N MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu ch mang tnh
cht tham kho 1 MC LCTrang Phn I.CHUN B S S LIU TNH TON LA CHN DY
CHUYN CNG NGH I. Xc nh thng s tnh ton ...2 1.Lu lng tnh ton .2 2.
Xc nh nng cht bn..4 3. Xc nh dn s tnh ton 5 II. Xc nh mc x l nc thi
cn thit.6 1.Mc x l cn thit ca nc thi 6 2.La chn dy chuyn cng ngh 10
- Phng n I. 14 - Phng n II 15 Phn II: TNH TON CC CNG TRNHTRONG S
DYCHUYN CNG NGH 1.Ngn tip nhn nc thi...15 2.Song chn rc 16 3.B lng
ct ngang 18 4.Sn phi ct20 5.B lng ngang t I21 6.B Biophin cao ti (
b sinh hc ). 25 7.B lng ngang t II.. 28 8.B Mtan... 30 9.Tnh ton
trm kh trng..33 10. Tnh ton mng trn( mng trn vch ngn c l)...36 11.
Cng trnh b tip xc ly tm .37 12. Thit b o lu lng 38 13. Sn phi bn39
Phn III:THNG K B TR MT BNG VCAO TRNH CNG NGH 1. Mt bng 40 2. Cao
trnh mt nc . 41 A. Xy dng cao trnh cng ngh theo tuyn nc42 B. Xy dng
cao trnh cng ngh theo tuyn bn 44 Phn IV: TNH TON KINH T TRM X L
1.Gi thnh cng trnh xy dng... 45 2.Gi thnh qun l 46 Ti liu tham kho.
49 N MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu ch mang tnh
cht tham kho 2 Phn I CHUN B S S LIU TNH TON LA CHN DY CHUYN CNG NGH
I.Xc nh cc thng s tnh ton: 1.Lu lng tnh ton: * Lu lng nc thi sinh
hot: - Lu lng noc thi sinh hot trung bnh: Qsh = 1000.0q N ( m3/ng )
Vi: N: Dn s thnh ph, ngi; q0 : tiu chun nc thi thnh ph, 1/ng; Qsh =
1000150 . 120000= 18000( m3/ng ) Qsh = 750 ( m3/ h) Qsh =208( l /
s) Tra bng ta c h s khng iu ho K: Kch = 1,4 * Lu lng nc thi sn xut:
- Nh my I: QIsx = 1200 ( m3 /ng ) QIsx = 50 ( m3 / h) - Nh my II:
QIIsx = 1650 ( m3 /ng ) QIIsx = 68,8 ( m3 / h) * Lu lng tnh nc thi
thnh ph: Dokhngrtiliuvquylutthinccaccxnghipcngnghipnn coi lu lng nc
thi sn xut phn phi u theo cc gi trong ngy. V ta s c: N MN HC: X L
NC THI Cng ty CPTM v CNC Hong AnhTi liu ch mang tnh cht tham kho 3
Bng tng hp lu lng nc thi thnh ph ( Bng 1.1 ) gi% QshQsh( m3/h)%
QsxQsx( m3/h)Qtng( m3/h) 0 - 11.652974.168118.8415.8 1 -
21.652974.168118.8415.8 2 - 31.652974.168118.8415.8 3 - 4
1.652974.168118.8415.8 4 - 51.652974.168118.8415.8 5 -
64.27564.168118.8847.8 6 - 75.810444.168118.81162.8 7 -
85.810444.168118.81162.8 8 - 95.8510534.168118.81171.8 9
-105.8510534.168118.81171.8 10-115.8510534.168118.81171.8
11-125.059094.168118.81027.8 12- 134.27564.168118.8874.8 13-
145.810444.168118.81162.8 14- 155.810444.168118.81162.8 15-
165.810444.168118.81162.8 16- 175.810444.168118.81162.8 17-
185.7510354.168118.81153.8 18- 195.29364.168118.81054.8 19-
204.72849.64.168118.8968.4 20 -214.17384.168118.8856.8 21-
222.855134.168118.8631.8 22- 231.652974.168118.8415.8 23- 241.65
2974.168118.8415.8 Tng10018.000100285020850 - Lu lng tnh ton ngy m:
Qtt = 18.000 + 1200 + 1650 = 20.850( m3/ ng ) - Lu lng tnh ton gi
thi nc ln nht: Qhmax = 750.1,4 + 50 + 68,8 = 1162,8 ( m3/ h ) Ta c
lu lng nc thi tnh bng giy ln nht: N MN HC: X L NC THI Cng ty CPTM v
CNC Hong AnhTi liu ch mang tnh cht tham kho 4 qsmax = 324,67 ( l/s
) qsmax = 0,325 ( m3/ h ) - Lu lng tnh ton gi thot nc nh nht: Qhmin
= 415,8 ( m3/ h ) Ta c lu lng thi nc tnh bng giy nh nht: qsmin =
115,5 ( l/ s) - Lu lng trung bnh:
Qhtb = 20850/24 = 868,75 ( m3/ h )Ta c lu lng nc thi trung bnh
tnh bng giy: qstb = 868,75/3,6 = 241 (l/ s) 2.Xc nh nng cht bn: *
Nc thi sinh hot : - Hm lng cn trong nc thi sinh hot: Csh =1000
.0qashc (mg/ l) vi: - ashc : tiu chun thi cn i vi nc thi sinh hot (
55- 60 ) ( g/ng.ng) - q0 : tiu chun nc thi, 150 ( l/ng.ng); Csh =
1501000 . 55 =366,67(mg/ l) - Hm lng BOD c trong nc thi : Lsh
=01000 .qashBOD (mg/ l) vi :
-ashBOD:hmlngBOD5tnhtheoungincthisinhhot,theotiu chun ly bng 30(
g/ng.ng); Lsh = 1501000 . 30 = 200 (mg/ l) * Nc thi sn xut: N MN
HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu ch mang tnh cht
tham kho 5 Bng s liu nc thi sn xut ( Bng 1.2) S liu Tn nh my III Lu
lng, ( m3/ h)1200 1650 Hm lng cht l lng, ( mg/l ) 290120 BOD5 , (
mg/l )105127 COD,( mg/l ) pH Nhit 0C
Tng hp s liu: - Hm lng cn trong hn hp nc thi: Chh =
++sxishsxisxish shQ QQ C Q C . .
Chh = 2700 1200 180001650 . 120 1200 . 290 18000 . 67 , 366+ ++
+ = 342,74 ( mg/l ) - Hm lng BOD5 c trong hn hp nc thi: Lhh =
++sxisxsxisxish shQ QQ L Q L . . Lhh =1650 1200 180001650 . 127
1200 . 105 18000 . 200+ ++ + = 188,76( mg/l ) 3. Xc nh dn s tnh ton
: - Dn s tnh ton : Ntt = Nt + Ntd
Vi: Ntt : Dn s tnh ton, ngi; Nt: dn s thc ca thnh ph, 120.000(
ngi); Ntd :dn s tng ng quy i t cc nh my: +, Quy i theo hm cn l lng:
N MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu ch mang tnh
cht tham kho 6 NCtd = shcsxisxiaQ C. NCtd = 551650 . 120 1200 . 290
+= 9927 ( ngi ) Suy ra : NCtt = 120.000 + 9927 = 129.927 ( ngi ) +,
Quy i theo hm lng BOD5 : NtdBOD5= shBODsxisxiaQ L5. NtdBOD5= 301650
. 127 1200 . 105 + = 11.185 ( ngi ) Suy ra : NttBOD = 120.000 +
11.185 = 131.185 ( ngi ) II.Xc nh mc x l nc thi cn thit : * La chn
s dy chuyn cng ngh: 1.Mc x l cn thit ca nc thi : - H s pha long ca
nc ngun vi nc thi Nc thi thnh ph sau khi x l s c a vo ngun l sng,
loi A. Cc s liu v ngun tip nhn ( Bng 1.3 ) c im S liu v sng Loi
ngunA Lu lng nh nht im tnh ton ( m3/ s )48,1 Mc nc cao nht cng x
,(m )1 Mc nc thp nht cng x ,(m )2 Vn tc trung bnh ca dng chy, (m/
s)0,30 Chiu su trung bnh ca nc ngun, (m)4 Theo lch sng, (m
)3950Khong cch trung bnh tcngxnim tnh ton Theo ng thng, (m)3500
Nhit trung bnh ca nc v ma h, (0C)26,5 Hm lng cht l lng v ma h, (
mg/l )28 N MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu ch
mang tnh cht tham kho 7 BOD5, ( mg/l )2,9 Lng oxy ho tan, ( mg/l )
6,7 Theo Frolop - Rodginler ta c s ln pha long: n = sssqq Q
amaxmax. + Vi: Qs : Lu lng tnh ton ca ngun nc, 48,1 (m3/s ); qsmax
: Lu lng nc thi ln nht, (m3/s ); : H s so trn, xc nh: a =
..11max3131sxsxqe Qe+o .x1:khongcchtimcngxnimtnhtontheochiu dng
chy, m; . : H s tnh n nh hng thu lc: =3max.qE o : H s khc khuu ca
sng: = x1/x2 = 3959/3500 = 1,13 :Hsphthucvtrxncthi,thitkhngxgn b, =
1 E : H s khuych tn: E =200.H u= 2004 . 3 , 0= 0,006 = 1,13 13325 ,
0006 , 0 = 0,298 N MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi
liu ch mang tnh cht tham kho 8 a = 333950 . 298 , 03950 . 298 ,
0.325 , 01 , 4811+ee = 0,42 Suy ra : n = 325 , 0325 , 0 1 , 48 . 42
, 0 + = 63 ( ln) * Mc x l nc thi cn thit : - Theo hm lng cn l lng:
Hm lng cnl lng sau x l : Ct = (nssC pqQ a+ + ). 1.max Vi : . Cn :
Hm lng cn ca nc ngun trc khi x thi, Cn = 28(mg/l ); . p : tnghmlng
cn chophp,ngunloiA cho php p = 0,5 1( mg/l ), chn p = 0,75 ( mg/l
); Ct =8 , 2 75 , 0 ). 1325 , 01 , 48 . 42 , 0( + += 75,37 (mg/l )
Theo TCVN 5945 - 2005 ly Ct = 100 (mg/l )Mc x l nc thi cn thit: E0
=hht hhCC C E0 =% 100 .74 , 342100 74 , 342 = 70,82 % - Theo hm lng
BOD BOD5 sau khi x l: Lt = Ktcf t kng cft K ssLL LqQ a+ 10) 10 .
.(10 ....max Vi : t : thi gian xo trn sau khi x thi nc thi vo ngun
: t = x1/ = 3950/0,3 = 13.166,67 (s ) 3,65 h 0,15 ngy K: Hng s tc
oxy ho ca nc thi v nc ngun KT = K20 T- 20K20 = 0,1; = 1,0476, T =
21,5 0C K21,5 = 0,107 N MN HC: X L NC THI Cng ty CPTM v CNC Hong
AnhTi liu ch mang tnh cht tham kho 9 Lcf: Hm lng BOD cho php, Lcf =
4 (mg/l ) v ngun loi A Lng : Hm lng BOD c trong nc ngun, Lng = 2,5
( mg/l ) Lt = 15 , 0 . 1 , 015 , 0 . 1 , 015 , 0 . 1 , 0104) 10 . 9
, 2 4 (10 . 325 , 01 , 48 . 42 , 0+ = 81,34( mg/l ) Cn c theoTCVN
5945 - 2005gi tr ti hn ca BOD5 khixvongunloiAl 30 mg/l nn ta c hiu
qu x l cn thit theo BOD l: EBOD =hht hhLL L .100% EBOD = 76 , 18830
76 , 188 .100% = 84,1 % * Theo Oxy ho tan : Khng k n oxykhuych tn
bmt.HmlngBOD5 sau khixl cho phpx vo ngun Lt c tnh trong biu thc:
aQngOng - ( aQLng10-2K1ng + qLnth10-2K1nth ) = ( aQng + qsmax )Oyc
Lnt = nth ntkyck ng kng yc ngs ngO L O OqQ a1 1 12 2 2max10 . 10 ).
10 . .(. Vi : Qng : Lu lng tnh ton ca nc ngun, 48,1( m3/s ); Ong
:Lng Oxyho tanvonccangun trc khixnc thivo 6,7( mg/l );
Lng,Lt-BOD5cancngunvncthisaukhicchophpxvo ngun, Lng = 2,9 mg/l; Lng
Oxy ho tan nh nht cn t c l : 6mg/l Suy ra ta tnh c :
Lnth = 1 , 0 . 2 1 , 0 . 2 1 , 0 . 210 . 4 10 ). 10 . 9 , 2 6 7
, 6 .(325 , 01 , 48 . 42 , 0 = -117,64 < 0 + C k n lng Oxy
khuych tn qua b mt: Xc nh nng BOD5 yu cu m bo hm lng oxy ho tan
trong nc sng m c k n qua trnh khuych tn oxy b mt. Ta c nhit ca sng
l 21,5 0C, tra bng ta c Osbh = mg/l8,58 thiu ht oxy ban u l : Da =
Osbh - Os = 8,58 - 6,7 = 1,88 mg/l N MN HC: X L NC THI Cng ty CPTM
v CNC Hong AnhTi liu ch mang tnh cht tham kho 10 thiu ht oxy sau
khi thi l : Dt = Obh - Ocfs = 8,58 -6 =2,58 mg/lThi gian ti hn ng
vi lng oxy nh nht l : tth = 1 21212.) 1 (1 lg(k kL kk k Dkkaa((
Trong : La : nhu cu oxy sinh ho ban u k2 = 0,21 do vn tc sng chy
yu ( v < 0,5m/s ) k1 = 0,126 tth =2126 , 0 21 , 0126 , 0) 126 ,
0 21 , 0 ( 88 , 11126 , 021 , 0lg=||.|
\|((
aL La = 20,95 (mg/l ) ) / ( 1041 95 , 20325 , 0) 9 , 2 95 , 20 (
1 , 48 42 , 0) ( .l mg LqL L Q qLang at= + = += -
Theotiuchun5945:quynhnnggiihnchocaBOD5khix thi nc vo ngun loi A l
30 mg/l nn phi ly lng BOD cn x l = 50mg/l do hiu qu cn x l cn thit
theo BOD : % 2 , 86 % 10053 , 21730 53 , 217% 100 = = =hhT hhBODL L
LE Nh vy mc x l nc thi l : . Hm lng cht thi l lng l 70,8% . Theo
BOD mc x l l 86,2% 2. La chn dy chuyn cng ngh: * Cc mc x l cn thit
ca nc thi: Theo tnh ton cc yu cu x l phn trn ta c mc x l cn t n: -
Theo hm lng cht l lng: 70,8% - Theo BOD mc x l : 86,2% - Theo hm
lng oxy ho tan c k n s khuych tn oxy khng kh cn x l hon ton nc thi.
* La chn dy chuyn cng ngh Phng n I: -S dy chuyn cng ngh : N MN HC:
X L NC THI Cng ty CPTM v CNC Hong AnhTi liu ch mang tnh cht tham
kho 11 Ngn tip nhn Song chn rc B lng ct ngang B lm thong s b B lng
ngang t I B Aerotank B lng ngang t II Mng trn B tip xc My nghin rc
Sn phi ct B Metal Trm nn kh B nn bn Sn phi bn Ra sng Bn rung Trm
Clo N MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu ch mang
tnh cht tham kho 12 -Phn tch phng n I: - Noc thi c dn t mng li v a
qua ng c p vo ngn tip nhn: . Ngn tip nhn c b tr trn cao m bo th nng
cho noc c th t chy qua cc cng trnh x l khc. - Nc thi qua song chn
rc: . Ti y, cc rc ln s c song chn rc gi li . B phn vt rc c gii s a
rc thi t my nghin sau rc nghin c a v b Mtan d x l. - Nc thi tip tc
i qua b ln ct ngang: . Ta thit k b lng ct ngang c c s tin li trong
thi cng v vn dng qun l m vn t c hiu qu x l cn thit. . Cc loi ht
khong, ct, v kim loi ( mt phn nh ) s c gi li v a sang sn phi ct lm
kh. - Nc thi c dn ti b ng t sinh hc: . Cng trnh ng t sinh hc vi chc
nng ca n s m bo s hot ng n nh ca cc cng trnh sau. - Tip nhn nc thi
i qua b lng ngang t I: . Bc u ca phn hu cc cht hu c. . Bn cn lng c
a sang b mtan . - Nc thi tip tc i sang b Aroten thc hin qu trnh phn
hy hu c: . Cc cht hu c kh phn hu s c phn hu mt cch trit hn ti y qua
qu trnh sinh trng v pht trin ca vi sinh vt. - Nc thi qua b lng t
II: . Nhm tch cc ht cn to thnh b aeroten, lm sch hn cho nc thi. -
Bn lng b t II c a sang b nn bn ly tm gim m sau dn sang b mtan v cui
cng l sn phi bn. - Sau nc thi c kh trng, qua b tip xc lm tng qu
trnh kh trng ca cht ho hc v s khuych tn trong nc. - Nc thi s c a
qua mng dn v ngun tip nhn. - cc cht b sau khi phn hu b mtan th c a
ra sn phi bn. ti y qu trnh lm kh v a bn i s dng s c tip din. * Phng
n II: - S dy truyn cng ngh N MN HC: X L NC THI Cng ty CPTM v CNC
Hong AnhTi liu ch mang tnh cht tham kho 13
Ngn tip nhn Song chn rc B lng ct ngang B lm thong s b B lng
ngang t I B Biophin cao ti B lng ngang t II Mng trn B tip xc My
nghin rc Sn phi ct B Metal Trm nn kh Sn phi bn Ra sng Bn rung Trm
Clo N MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu ch mang
tnh cht tham kho 14 - Phn tch phng n th 2: - Nc thi c dn t mng li a
qua ng c p vp ngn tip nhn . Ngn tip nhn c b tr trn cao m bo th nng
cho nc c th t chy qua cc cng trnh x l khc. - Nc thi qua song chn
rc: . Ti y cc rc ln s c song chn rc gi li . B phn vt rc c gii s a
rc thi t my nghin sau rc nghin c a v b Mtan d x l. - Nc thi tip tc
i qua b ln ct ngang: . Ta thit k b lng ct ngang c c s tin li trong
thi cng v vn dng qun l m vn t c hiu qu x l cn thit. . Cc loi ht
khong, ct, v kim loi ( mt phn nh ) s c gi li v a sang sn phi ct lm
kh. - Nc thi c dn ti b ng t sinh hc: . Cng trnh ng t sinh hc vi chc
nng ca n s m bo s hot ng n nh ca cc cng trnh sau. - Tip nhn nc thi
i qua b lng ngang t I: . Bc u ca phn hu cc cht hu c. . Bn cn lng c
a sang b mtan . - Nc thi tip tc i sang b Biophin thc hin qu trnh
phn hy hu c: . Cc cht hu c kh phn hu s c phn hu mt cch trit hn ti y
qua qu trnh sinh trng v pht trin ca vi sinh vt. - Nc thi qua b lng
t II: . Nhm tch cc ht cn to thnh b Biophin, lm sch hn cho nc thi. -
Sau nc thi c kh trng, qua b tip xc lm tng qu trnh kh trng ca ho cht
v s khuych tn trong nc. - Nc thi s c a mng dn ra ngun tip nhn. - Cc
cht b sau khi phn hu b mtan th c a ra sn phi bn.Ti y qu trnh lm kh
v a bn i s dng s c tip din. * La chn phng php ti u : Da trn nhng u
im ni bt nht ca phng n I: - Tnh ph hp gia cc cng trnh vi cng sut
trm, cc n nguyn se pht huy c ht cng sut v u im. - Cc n nguyn c th c
khi tch ln nhng cng ph hp vi tnh hnh ca a phng v din tch mt bng. -
Tnh cht ca cc cng tnh ph hp vi iu kin kh hu cng nh trnh vn hnh qun
l. - Mc d khi lng xy dng cng trnh ln nhng phng n I s n nh sua khi
lm vic. N MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu ch
mang tnh cht tham kho 15 - Phng n II xy dng thun tin nhng sua 1 thi
gian lm vic vi cng sut ln cng trnh lm vic khng n nh. Do b Biophin s
dng vt liu lc ln lp mng sinh vt bm trn vt liu lc, sau mt thi gian
lm vic s gim hiu qu x l T cc u im trn ta quyt nh chn phng n I. Phn
II TNH TON CC CNG TRNH TRONG S DY CHUYN CNG NGH 1. Ngn tip nhn: Nc
thi thnh ph thng c dn bng cc ng p lc ln ngn tip nhn. Ngn tip nhn c
lp y, b tr trn cao t nc thi c th t chy qua cc cng trnh x l. - Da vo
Bng 16.3 - Gio trnh: X L NC THI- PGS.TS. Hong Vn Hu; PGS.TS Trn c
H, ta c th s b chn kch thc ca ngn tip nhn, ng vi lu lng Qhmax =
1168(m3/h) nh sau: Kch thc s b ngn tip nhn ( Bng 2.1) Kch thc c
bnng knh ng dn ABH1hh1bll2l1 2 ng
2000230020001600750750600100001200250 Chn mng dn nc sang cng trnh
tip theo l mng c tit din hnh ch nht, ta c cc thng s c bn sau: Thng
s tnh ton thu lc mng dn (Bng 2.2) Lu lng tnh ton (l/s )Thng s tnh
ton qmax = 325qtb = 241qmin = 115 chiu rng mng800800800 N MN HC: X
L NC THI Cng ty CPTM v CNC Hong AnhTi liu ch mang tnh cht tham kho
16 dc i0,00050,00050,0005 y (h/H)0,7430,5880,328 Chiu caolp nc
(m)0,7430.5880,328 Vn tc v (m/s)0,610,5690,4726 Ta tnh c chiu su lp
nc ln nht vi lu lng ln nht ng vi l lng v y ln nht 0,743: h =
1000.0,743 = 743 (mm ) 2. Song chn rc :* S khe h song chn rc: - Chn
2 song chn rc 1 cng tc v 1 d phng. S khe h n ca 1 song chn :
b hk qns. ..10v= ( khe ) Vi : . q : lu lng tnh ton ln nht, (
m3/s ); . vs : tc nc chy qua song chn, vs = 1 m/s . h1 : su nc chn
song chn rc, m; . k0 : h s tnh n s thu hp dng chy , k0 = 1,05; . b
: chiu rng khe h song chn rc, chn b = 0,016(m); 292 . 016 , 0 . 743
, 0 . 105 , 1 . 325 , 0= = n ( khe ) * Chiu rng bung t song chn rc:
Chiu rng bung t song chn rc Bs : Bs = d.(n + 1 ) + b.n ( m ) Vi : .
d : dy thanh song chn rc, d = 0,012 ( m ); Bs = 0,012.( 29-1 )+
0,016.29 = 0,8 ( m ) - Kim tra vn tc qua song chn rc vi lu lng nh
nht nhm trnh s lng ng cn rong mng; v = o,4m/s 22 , 0328 , 0 . 8 , 0
. 2115 , 0.minminminmin= = = u vh Bqss ( m/s ) * Chiu di bung t
song chn rc:Cng thc: L = l1 + l2 + ls ( m ) Vi : N MN HC: X L NC
THI Cng ty CPTM v CNC Hong AnhTi liu ch mang tnh cht tham kho 17 ls
: Chiu di t bung song ly bng 3(m); l1, l2 : chiu di on mng m rng,
thu hp trc v sau thanh chn rc: ) (. 2mtgB Blm su= : gc m, = 200, ly
bng 0,349 rad ; = 1l 020 28 , 0 8 , 0=tg ( m ) l2 = 0,5l1 = 0,5.0 =
0 ( m ) = L 0 + 0 + 3 = 3 ( m ) * Chiu su xy dng ca bung t song chn
rc: - Tn tht p lc qua song chn rc: htt =) ( .. 2.02m kgv ; k = 2;
Vi : : h s tn tht cc b ca song chn rc: o u sin . .3 / 4|.|
\|=bs . v : vn tc trc song chn rc, ly bng 1,0 (m/s ); . : Gc
nghing t song chn rc, = 600 ; . u: H s ph thuc vo thanh chn rc;
2,42; 02 , 2 60 sin .016 , 0012 , 0. 42 , 23 / 4= |.|
\|= ) ( 31 , 0 3 .81 , 9 . 21. 02 , 22m htt= =Ta ly s b tn tht
xut hin khi my vt rc c gii hot ng l 0,1 ( m ) - Chiu su xy dng ca
bung t song chn rc: H = h + hccln + hbv = 0,31 + 0,743 + 0,5 =
1,55( m ) vi 0,5 l chiu cao bo v * Lng rc gi li song chn rc: Lung
rc gi li song chn rc c tnh theo cng thc: ) / ( 85 , 21000 .
365129927 . 81000 . 365.3ng mN aw = = = N MN HC: X L NC THI Cng ty
CPTM v CNC Hong AnhTi liu ch mang tnh cht tham kho 18 Vi : . a :
lng rc tnh trn u ngi trong mt nm, 8 (l/ng.n ) . N : S dan tnh ton
tng ng theo hm lng cn l lng, 129927( ngi) - Vi dung trng rc l 750 (
kg/m3 ) th tng lng rc trong ngy s l: p = 750.2,85 = 2137 kg/ng p =
2,137 T/ng - Lng rc trong tng giog ca ngy m: p1 =18 , 0 224137 ,
224= = hkp ( tn/ngy) - Rc c nghin nh bng my nghin sau a trc tip n b
mtan. - Lng rc cung cp cho my ngin l 40m3/tn rc. Q = 40.p =
40.2,137 = 85,48 ( m3/ngy ) - Tng s song chn rc l 3 trong 2 cng tc,
1 d phng 6010012341. Song chn rc2. ng c dn ng3. B phn vt rc4. Dy
chuyn5. Bung t song chn rc 3. B lng ct ngang: N MN HC: X L NC THI
Cng ty CPTM v CNC Hong AnhTi liu ch mang tnh cht tham kho 19 B lng
ct ni chung c nhim v tch cc ht khong, cc ht mt kim loi v ct... c
trng lng ln ra khi nc thi.S tnh ton cho 2 b lm vic v mt b d phng :
* B lng ct ngang : - Chiu di b lng ct ngang: ) ( 89 , 122 , 248 , 0
. 3 , 0 . 3 , 1 . 1000 . . . 10000mUh v KL = = = Trong : . K : h s
ph htuc vo kiu b lng, ly K = 1,3 . h : chiu su tnh ton ca b lng ct,
chn h = 0,8m . v : Tc ca nc trong b lng, ly v = 0,3 m/s . Uo : Tc
thu lc ca ht ct, theo TCXDVN 51:2006 ly Uo =24,2(m/s ) - Chn b lng
ct gm 2 nguyn n cng tc v mt nguyn n d phng, din tch t ca mi n
nguyn: 2max, 542 , 02 . 3 , 0325 , 0.W mn vqs= = =Trong : qsmax :
Lu lng ln nht giy ca nc thin : s ngn lm vic ng thi, n = 2 - Chiu
rng ca mi n nguyn: 5 -mng thu nc4 - mng phn phi3 -h thu cn2 -mng dn
nc ra1 -mng dn nc vo4352 11 2 N MN HC: X L NC THI Cng ty CPTM v CNC
Hong AnhTi liu ch mang tnh cht tham kho 20 ) ( 68 , 08 , 0542 , 0
Wmhb = = =- Th tch phn lng ct ca b lng ct xc nh theo cng thc: ) ( 2
, 510002 . 02 , 0 . 1299271000. .W3cmT P Ntt= = =trong : . Ntt : dn
s tnh ton theo cht l lng . P : lng ct c gi li trong b th theo u
ngi, theo TCXDVN 51:2006 ly P = 0,02l/ng T : chu k thi ct, ly T =
2ng - Chiu cao lp ct trong b lng ct : ) ( 297 , 02 . 68 , 0 . 89 ,
122 , 5L.b.nWcm hc= = =Trong : n : s ngn lm vic ca b lng, n = 2 -
Chiu cao xy dng ca b lng ngang: HXD = htt + hc + hbv = 0,8 + 0,3 +
0,5 = 1,59m ly HXD = 1,6 m Trong : hbv : chiu cao bo v, ly hbv =
0,5m Kim tra li th ton vi iu kin: vmin >= 0,15 (m/s) m bo tnh
lng cn) / ( 26 , 0328 , 0 . 68 , 0 . 2115 , 0. . 2vminminmins mh
bqs= = =Ct c a ra khi b bng thit b nng thu lc. 4. Sn phi ct : Ct c
lm ro sn phi ct. Sn phi ct c xy dng gn b lng ct, chung quanh c p t
cao. Nc sau khi tu t sn phi ct qua h thng ng dn v trc b lng ct. N
MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu ch mang tnh cht
tham kho 21 II 12 3 4 S TNH TON Mt ct A- A Ra sn phi ct 1. ng dn ct
t b lng 2. Mng phn phi 3. ng dn D200 tiu nc 4. hai lp nha lt sn Mt
bng sn phi ct Ra sn phi ct - Din tch sn phi ct c tnh theo cng thc :
) ( 98 , 1895 . 1000365 . 129927 . 02 , 0. 1000365 . .2mhN PFctt= =
=Vi : . P : Lg ct tnh theo u ngi trong mt ngy m, P = 0,02( l/ng) .
h : chiu cao lp ct trong mt nm, h = 5 (m/nm) . Nctt : Dn s tnh ton
theo cht l lng, Nctt = 129927ngi Ta chn din tch xy dng l 190 m2 v
sn phi ct gm 2 vi kch thc mi l 9,510m 5. B lng ngang t I: - B lng
ngang t I l b lng s b cc tp cht th khng tan trong nc thi - Vic tnh
ton b lng ngang t I c tin hnh tun theo quy nh trong iu
6.5-42TCN-51-2006.
N MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu ch mang tnh
cht tham kho 22 S TNH TON B LNG NGANG T I
Cc thng s k thut b lng ngang t I: - Chiu di b lng ngang:
0..U K H vL =Vi : . v : vn tc dng nc trong b lng ngang, theo quy
phm v = 8mm/s . H : chiu cao cng tc ca b lng , ly H = 3m . K : h s
ph thuc loi b lng , vi b lng ngang K = 0,5 . U0 : th thu lc ca ht
cn, c xc nh theo cng thc sau: ) / ( 41 , 132 , 1 . 843 . 96 , 03 .
5 , 0 . 1000... . 10000s mm whH KtH KUn= = |.|
\|=o Vi : . n : h s ph thuc tnh cht ca cht l lng, vi nc thi sinh
hotn = 0,25413 31 2 Hct5HthHbv2 hbv: chiu cao lp bo vhth: chiu cao
lp trung hahct: chiu cao cng tcmng phn phi nc h thu cnmng dn nc
ramng dn nc vomng thu nc 25341 N MN HC: X L NC THI Cng ty CPTM v
CNC Hong AnhTi liu ch mang tnh cht tham kho 23 . : H s tnh n nh hng
ca nhit ca nc thi.Theo tiu chun tnh ton v nc thi ta c : =0,96 . t:
Thi gian lng ca nc thi trong hnh tr vi chiu su lp nc h t hiu qu lng
bng hiu qu lng tnh ton ly theo bng 612 TCN 51-2006. Vi Chh =
342,79(mg/l ) Ta c : t = 843s, hiu sut lng E = 55% . nhH K|.|
\| .c tra theo bng 6.13 TCN 51-2006, H = 3m ta c nhH K|.|
\| .=1,32 . w : vn tc ca dng chy theo thnh phn ng, theo bng
6.11TCN 51-2006, w = 0,03(mm/s) Ta tnh c chiu di b: ) ( 04 , 3441 ,
1 . 5 , 03 . 8m L = =- Din tch t ca b lng: ) ( 625 , 40008 , 0325 ,
02 maxmvQ= = = O- Tng chiu rng b: mHB 54 , 133625 , 40= =O= Chn s
ngn b l n = 4. chiu rng mi ngn b l: b = B/4 = 3,385 (m) - Kim tra
vn tc thc t : s mm s mb HQvth/ 9 , 8 / 0089 , 0385 , 3 . 3 . 6 ,
3325 , 0. . 6 , 3max= = = =- Chiu cao xy dng b: HXD = h1 + h2 + h3
+ h4 = 0,5+ 3 + 0,3+ 0,3 = 4,1(m) trong : . h1 : chiucao bo v , h=
0,5m . h2 = H = 3 m . h3 : chiu cao lp nc trung ho chn h3 = 0,3 m .
h4 : chiu cao lp bn cn ( 0,2- 0,5 )m Vy tng th tch ca b lng ngang t
I l : W = B.L. (Hxd -h1) = 13,54.34,04.(4,1- 0,5)= 1659,24 (m3 )
Thi gian lu nc trong b vi lu lng ln nht : ) ( 42 , 13600 . 352 ,
024 , 1659QWmaxh T = = =- Dung tch ngn cha cn :
). 100 (100 . . . .W0 .cpT E C Qngd= N MN HC: X L NC THI Cng ty
CPTM v CNC Hong AnhTi liu ch mang tnh cht tham kho 24 Trong : .
Qngd : lu lng ngy m, Qngd = 20850(m3/ngd) . Co : Nng cht l lng
trong nc thi trc khi lng, C0 = 342,74(mg/l) . E : hiu sut b lng
ngang t I , E = 55% . T : Thi gian gia hai ln x cn, T = 1 ngy . p :
m ca cn, p = 93% . : trng lng trn mt n v th tch ca cn (1T/m3 ) ) .
/ ( 15 , 5610 ). 93 100 (1 . 55 . 74 , 342 . 20850). 100 (100 . . .
.W360 .cd ng mpT E C Qngd=== Hm lng cn sau khi qua b: ) / ( 23 ,
154100) 55 100 .( 74 , 342100) 100 .( CC0 0l mgE===Ta thy C >
150mg/l do vy cn lm thong s b, to qu trnh keo t cn l lng lm tng hiu
sut qu trnh lng trong b ct: E0 = 65 % ) / ( 96 , 119100) 65 100 .(
74 , 342100) 100 .( CC0 0l mgE===- Vy hm lng cn sau lng I tho mn yu
cu x l tip theo. -Tnh ton b lm thong s b : - Th tch b lm thong s b
c xc nh: ) ( 5 , 6601200 . 325 , 060.W3 maxsbmt q= = =Vi t: thi
gian thi kh, t = 20 pht = 1200s q: lu lng giy ln nht - Lng khng kh
cn cung cp cho b lm thong c xc nh theo lu lng ring ca khng kh : V =
D.qmax = 0,5.0,325 = 0,163 (m3/s) vi D : lu lng nc ca khng kh trn 1
m3 nc thi, D = 0,5m3/m3. - Din tch b lm thong s b mt bng: ) ( 4 ,
503 , 0163 , 02mIVF = = =vi I = 0,03m3/gi: cng thi kh ln 1m2 mt nc
trong 1h Kch thc thit k b lm thong s b: 3,4 x 1,6 m - Chiu cao cng
tc ca b lm thong s b : H = W/F = 6,5/5,4 = 1,2 m Chiu cao bo v ca b
chn hbv = 0,3m N MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu
ch mang tnh cht tham kho 25 Hm lng cht l lng sau khi lm thong s b v
lng vi hiu sut 65% c tnh bng cng thc :
) / ( 96 , 119100) 65 100 .( 74 , 342100) 100 .( CC0 0l mgE===-
Kt qu ny tho mn yu cu - Sau b lm thong s b v b lng ngang BOD gim
15% do ta c BOD ca nc tah trc khi vo b Biophin l: BOD =
188,76.(100-15)% = 160,45mg/l 6.B Biophin ( b lc sinh hc cao ti )
Nc sua khi lm thong s b v lng b lng ngang t I, c dn ti b Biophin.
Tnh ton b Biophin da trn TCXDVN 51 -2008. BOD5 ca noc thi khng vt
qu 250mg/l. H s hot ng ca b K:
taLLK = Trong : La : BOD5 ca nc thi a vo b Nc sau khi x l lng
ngang t I, BOD5 gim 15% BOD5 trc Biophin l La = 188,76.0,85 =
160,4(mg/l) Lt : BOD5 ca nc thi lm sch Lt = 30 (mg/l) T ta cK =
160,4/30 = 5,34 Theo 7.118 v bng 7.23 TCXDVN 51 - 2008 ta cChn ti
trng thu lc : Q = 30m3/m2.ng.. ng vi nhit trung bnh v ma ng l
21,50C. Ta c cc thng s : Lu lng kh a vo b B = 8m3/m2 nc thi. - Chiu
cao lp vt liu lc H = 2m Do BOD5 < 250mg/l nn chng ta khng phi
tun hon nc thi. * Din tch b Biophin: 0qQF =trong : Q : Lu lng thi
trung bnh ca nc thi, m3/ngy Q = 20850m3/ng. q0 : Ti trng thu lc
206953020850mqQF = = = N MN HC: X L NC THI Cng ty CPTM v CNC
Hong AnhTi liu ch mang tnh cht tham kho 26 Chn s b n = 4 * Din tch
mt bng 1 b: 275 , 17346954mFf = = = * ng knh b : m D 88 , 1414 ,
375 , 173 . 4= =* Tnh ton h thng phn lc: Lu lng tnh ton ca b : s
lqQb/ 17 , 81467 , 3244max= = =ng knh ca h thng ng ti : Dt = Db -
0,4 = 14,88 - 0,4 = 14,48(m) Chn s ng ti ca mi b l 4 vi d0 = 200mm
Vn tc chy trong c l : s m s mdQVb/ 1 / 65 , 02 , 0 . 14 , 308117 ,
0. 14 , 32 20< = = =nn t yu cu S l trn mi ng ti :
9314880801 11801 112=|.|
\| =||.|
\| =tDml Khong cch t mi l n trc ng l : mmmi Drii5 ,
771931.214880.2= = =vi i : s th t ca l k t trc cnh tiS vng quay
trong mt pht:
otqD d mn .. .10 . 8 , 34216=Trong : . d1 : ng knh l trn ng ti d
= 12mm . q0 : lu lng ca mi ng ti , q0 = 81,17/4 = 20,27 (l/s) N MN
HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu ch mang tnh cht
tham kho 27 54 , 3 27 , 20 .14880 . 12 . 9310 . 8 , 3426= = n
(vng/pht) p lc cn thit ca h thng ti : mm q h 04 , 38610 . 3001836 .
29420010 . 81112 . 1210 . 256. 27 , 2010 . 3001836 . 29420010 .
81112 . 1210 . 256.3 2 462 4623 2 462 4620=||.|
\|+ =||.|
\|+ =h = 386,04mm = 0,38604m Nh vy ph hp h| | e 1 2 , 0 t yu cu
B biophin cao ti mt ct a-a mt bng Lp vt liu lc cao 300 cm Lp b tng
c l dy 8 cm Lp b tng to dc Lp b tng ct thp dy 20 cm Lp b tng gch v
dy 20 cm ng dn nc vo b D300 Lp b tng c l BxB=1000x1000Lp vt liu lc
ng phn lc c l D200 N MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi
liu ch mang tnh cht tham kho 28 7.B lng ngang t II: Tnh ton theo
quy phm TCXDVN 51-2008 * Xc nh trng ti tnh ton b lng ngang t II sau
Biophin: q = U.Uo.3,6 (m3/m2.h) Trong : U = 0,5 : H s s dng th tch
i vi b lng ngang U0 = 1,8: ln thu lc bn cn sau Biophin q =
0,5.1,8.3,6 = 3,24 (m3/m2.h) * Din tch mt thong b lng: ) ( 74 ,
36024 , 38 , 11682 maxmqQFh= = =Chn : Vn tc chy trong b : v =
5(mm/s) = 0,005(m/s ) Chiu cao xy dng b : H = 3,5m * Din tch mt ct
t ca b l :
) ( 93 , 643600 . 005 , 08 , 11683600 .2 maxmvQfh= = = 1 143
3Hct2 5HthHbv2 hbv: Chiu cao lp bo vhth: chiu cao lp trung hahct:
chiu cao cng tch thu cnmng dn nc ramng dn nc vomng phn phi nc mng
thu nc 25341 N MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu
ch mang tnh cht tham kho 29 Chiu rng ca b : ) ( 55 , 185 , 393 ,
64mHfB = = = Chn s n nguyn xy lp : n = 4, Vy chiu rng ca mi n
nguyn:
) ( 637 , 4455 , 18mnBb = = = * Chiudi b lng ngang t II: ) ( 45
, 1955 , 1874 , 360mBFL = = =Thi gian lu nc li trong b : ) ( 08 ,
13600 . 005 , 045 , 193600 .hv Lt = = =Khng m bo thi gian lng ca b
lng ngang Biophin ( t = 1,5 - 2 h ) m bo thi gian lu nc li trong b
lng ta cn chiu di b lng ngang t II l : L = v.t = 0,005.1,5.3600 =
27 ( m ) ng vi thi gian nc lu li trong b : t = 1,5 h * Th tch vng
cha bn cn nn :
( )) (4 . 1000 . 1000 . 100100 . .W3bmpN att=Trong :. a =
28g/ng. : tiu chun bn hot tnh sau Biophin . p = 93% : m bn hot tnh
d. . n = 4 : s n nguyn b lng. . Ntt = 131185 ngi : Dn s tnh ton
theo BOD20
( ) ( )) ( 1185 , 134 . 1000 . 1000 . 93 100100 . 131185 . 284 .
1000 . 1000 . 100100 . .W3bmpN att=== Chiu cao lp bn trong b lng: )
( 104 , 0637 , 4 . 271185 , 13.Whbmb L b= = = * Chiu cao xy dng b
lng ngang t II: HXD = hbv + hth + hb + H = 0,5 + 0,4 + 0,104 + 3,5
= 4,5( m) N MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu ch
mang tnh cht tham kho 30 10 11 1. ng dn cn ti v bn hot tnh 2.ng x
cn ln men D250 3.ng tho cn b 4.ng dn hi nng 5.ng dn kh t 6.ng trn
7.b tng 8.gch 9.x 10. lp ph mm 11. my trn kiu chn vt Trong : . hbv:
Chiu cao bo v b lng . H : chiu cao cng tc b . hth : chiu cao lp nc
trung ho . hb: chiu cao lp cn lng Kch thc xy dng b lng ngang t II c
xc nh : H.B.L = 4,5.18,55.27 (m) 8. Tnh ton b Metal: 9 6 1 72 4 3
Cc loi cn c dn ti x l ti b mtan bao gm : - Cn ti t b lng t I - Bn
hot tnh t b nn bn ng tp trung sau lng t II - Rc nghin. a. Cn ti t b
lng ngang t I : Khi lng bn cn ( )6c10 . 100. . .WpK E Q Co hh=Trong
:. K : h stnh n s tng lng cn do c ht l lng ln,K = 1,1 N MN HC: X L
NC THI Cng ty CPTM v CNC Hong AnhTi liu ch mang tnh cht tham kho 31
. Chh : hm lng cn l lng tron hn hp nc thi, Chh = 342,74mg/l . Q: lu
lng nc thi ngy m , Q = 20850m3/ng. . E0: Hiu sut lng b lng ngang t
II sau lm thong s b E0 = 65 % . p: m bn cn sau lng I ( ) ( )) ( 99
, 7210 . 93 1001 , 1 . 65 . 20850 . 74 , 34210 . 100. . .W36 6cmpK
E Q Co hh===
b. Bn hot tnh nn : Khi lng bn cn sau lng t Ii tnh ton l: Wb =
13,1185 ( m3 ) Vi hiu sut nn bn b nn bn ng l : Enb = 70% m gim t
97%90% theo tiu chun thit k 20 TCN 51- 84 Dung tch khi bn cn sau nn
cn: Wbn = Wb . Enb = 13,1185 . 70% = 9,182 (m3 ) c. Lung rc nghin :
Lng rc nghin nh, m tng: p1 = 80% n p2 = 95%: ) . / ( 76 , 895 10080
100. 19 , 2100100. W W321r ad ng mpp===Vi : Wr = 2,19 m3/ng.d l lng
rc vt ln t song chn , m 80% suy ra : Th tch ca hn hp cn: Whh = Wa +
Wbn + Wc = 8,76 + 9,182 + 72,99 = 90,9 (m3/ng.d) * m trung bnh ca
hn hp cn l : ||.|
\| + + =hhhhW1 . 100 pk k kR B C
Trong : . Ck : lng cht kh trong cn ti ) . (tan/ 65 , 310095 100.
99 , 72100100. W Cc kd ngpc= |.|
\| = |.|
\| = . Bk : Lng cht kh trong bn hot tnh sau nn : ) . (tan/ 918 ,
010090 100. 182 , 9100100. W Bbn kd ngpbn= |.|
\| = |.|
\| =. Rk : lng cht kh trong rc nghin) . (tan/ 1095 , 010095 100.
19 , 2100100. W Rr kd ngpr= |.|
\| = |.|
\| = N MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu ch
mang tnh cht tham kho 32 Nn ta c : % 9 , 949 , 901095 , 0 918 , 0
65 , 31 . 100 Phh= |.|
\| + + =Vi m l 94,9% , ta chn ch ln men m vi nhit l : 33 350C. *
Dung tch b Metan c tnh : ) ( 90910100 . 9 , 90 100 . WW3 hhMmd= = =
Vid : liulng cn thi ngy m(%) theo tiu chun 42- 20 TCN51- 84, vi Phh
= 94,9 % , ch ln men m chn d= 10% Theo bng p3.8 " Tnh ton thit k cc
cng trnh x l nc thi HXD-2006" Ta chn xy dng b Metan vi kch thc: D =
15m, H = 7,5 m h1 = 2,35m,h2 = 2,6 m v th tch hu ch ca b l :
16000m3 - Lng kh ga thu c trong qu trnh ln men cn c tnh : 100n.D -
ay =Vi : . a: Kh nng ln nht ca cht khng tro ca cn ti: (%)44 )
53.(Ca0 0 00 0 0B R CB R+ ++ +=- Lng cht khng tro ca cn ti
( )100 . 100100 ). 100 .( CCk0c cT A =Vi :. Ac : m ho nc ng vi
cn ti , Ac : 5 6 %. T c : tro ca cht kh tuyt i ng vi cn ti, Tc =
25% ( )) . (tan/ 57 , 2100 . 10025 100 ). 6 100 .( 3,65C0d ng = =-
Lng cht tro ca rc nghin : R0
( )100 . 100100 ). 100 .( RRk0R RT A =Vi : . AR : m ho nc ng vi
rc nghinAR = 5 6% . T R : tro ca cht kh tuyt i ng vi rc nghin, TR =
25%
( )) . (tan/ 0772 , 0100 . 10025 100 ). 6 100 .( 0,1095R0d ng =
= N MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu ch mang tnh
cht tham kho 33 - Lng cht khng tro bn hot tnh d : B0
( )) . (tan/100 . 100100 ). 100 .( BBk0d ngT Ab b =Vi : . Ab: m
ho nc ng vi bn hot tnh d Ab = 6% . Tb : tro ca cht kh tuyt i ng vi
bn hot tnh d, Tb = 27%
( )) . (tan/ 673 , 0100 . 10027 100 ). 6 100 .( 0,981B0d ng =
=(%) 176 , 51673 , 0 0772 , 0 57 , 2673 , 0 . 44 ) 0772 , 0
53.(2,57a =+ ++ += n : H s ph thuc vo m cn a vo b ly theo bng 43-
20 TCN 51- 84 Vi Phh = 94,9%, t = 330C, ta c n = 0,89 Liu lng cn
thi ngy m D = 10%, ta coa lng kh thu c: ) . / ( 423 . 010010 . 89 ,
0 176 , 51100.y3d ng mD n a===K = y.(C0 + R0 + B0 ).1000 =
0,423.(2,57+ 0,0772 + 0,673) = 1404,45(m3/ng.d) 9.Trm kh trng nc
thi: Trm kh trng m nhn chc nng lm sch trit cc vi khun m cc cng trnh
x l c hc, sinh hc cha x l c trc khi x ra sng. kh trng nc thi, ta
dng phng php clorua ha bng hi clo Vic tnh ton trm kh trng nc thi c
hin theo: 6.20- TCN 51-84 Qu trnh phn ng gia clo v nc thi xy ra nh
sau: Cl2 + H2O = HCl + HOCl - Axit Hypoclorid mt phn b oxy ha.HOCl
v c bit io OCl- vi nng xc nh s to iu kin oxy ha mnh c kh nng dit
khun. HClO l axit khng bn, d b phn hy thnh acid clohydrid v xy
nguyn t HClO Cl- + OH+ N MN HC: X L NC THI Cng ty CPTM v CNC Hong
AnhTi liu ch mang tnh cht tham kho 34 - Lng Clo hot tnh cn thit kh
trng c tnh theo cng thc: 1000.Q ay =Trong : . Q: Lu lng c trng ca
nc thi, m3/h . a : Liu lng clo hot tnh xc nh theo 6.20- 20TCN 51-84
a = 3g/m3 - ng vi tng liu lng c trng ta xc nh c clo hot tnh: ) / (
506 , 310008 , 1168 . 31000.maxmaxh kgQ ayh= = = ) / ( 606 ,
2100075 , 868 . 31000.h kgQ ayhtbtb= = = ) / ( 247 , 110008 , 415 .
31000.minminh kgQ ayh= = = nh lng clo, xo trn clo hi vi nc cng tc,
iu ch v vn chuyn n ni s dng ta dng Clorato chn khng.Ta chn clorato
lm vic v mt clorato d phng c c tnh k thut da theo tiu chun sau: -
Cng sut theo hi clo : 1,28 8,1kg/h - Loi lu lng k : Pc = 5 - p lc
nc trc Ejector : 3- 3,5 kg,cm3 - Trng lng: 37,5 kg phc v cho 2
clorato, chn 3 ban cng trung gian bng thp tip nhn clo nc chuyn thnh
clo hi v dn ti clorator lm vic. Trong trm kh trng ta dng cc thng
cha clo c dung tch 512 lit - ng kinhd thng cha d = 0,64m - Chiu di
thng cha L = 1,8 m - Lng clo ly ra t 1m2 b mt trong thng cha 3kg N
MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu ch mang tnh cht
tham kho 35 - B mt cha clo bn trong thng l: 3,6m2. Nh vy lng clo ly
ra t mt thng cha l : qc = 3,6.3 = 10,8 (kg/h) - S thng clo cn thit
trong 1 gi l :25 , 008 , 10606 , 2= = =ctbqyN - S thng clo cn thit
trong 1 thng l :450030 . 24 . 606 , 250030 . 24 .= = =tbtyN thng -
Lu lng clo ln nht c tnh theo cng thc: ) / ( 34 , 21000 . 1000 . 15
, 0100 . 8 , 1168 . 31000 . 1000 .100 . ..3 maxmaxh mb Q aQh= = =
Vi b: nng clo trong nc ly theo ho tan clo trong nc ca ejecto, ph
thucvo nhit , b = 0,15% - Lng nc tng cng cn cho nhu cu ca trm
clorato c xc nh: ) / ( 56 , 41000) 300 1 . 1000 .( 506 , 310001000
.(3 ) 2 1 maxh mV V yQ =+=+=Trong : V1 = 1l/g_ ha tan clo trong nc
nhit 26,50C V2 = 300 l/g_ lu lng cn thit bc hi clo s b Nc clo c dn
ra mng trn bng ng cao su mm nhiu lp, ng knh ng : d = 70 mm, vn tc
dn v = 1,5 m/s N MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu
ch mang tnh cht tham kho 36 10.mng trn vch ngn c c l: xo trn nc thi
vi clot a dng mng trn vi thi gian xo trn c thc hin trong vng 1 n 2
pht. S mng trn vch ngn c l: mng trn vch ngn c l thng gm 2 n 3 vch
ngn vi cc l c ng knh l : d = 90 mm - S l trong 1 vch ngn c tnh : )
(. .. 42maxloV dqnt=Vi : qmax _ lu lng ln nht giy, q = 0,325m3/s d
= 0,09 m_ ng knh l V = 1 m/s_ vn tc nc chuyn ng qua l ) ( 511 . 09
, 0 . 14 , 3325 , 0 . 42lo n = =- Chn 6 hng l theo chiu ng v 10 hng
theo chiu ngang ly bng2d= 2.0,09 = 0,18m, -chiu ngang mng trn l :B
= 2d.9 = 0,18.9 = 1,62m - Chiu cao lp nc trc vch ngn th nht :
113221 - Mng dn nc vo2 - Mng thu ncra3 - Vch ngn c l N MN HC: X L
NC THI Cng ty CPTM v CNC Hong AnhTi liu ch mang tnh cht tham kho 37
H1 = 2d.7 = 0,18.7 = 1,26m - Chiu cao lp nc trc vch ngn th 2 l H2 =
H1 + h Vi h: tn tht p lc qua vch ngn th nht: mgVh 082 , 081 , 9 . 2
. 62 , 012 .2= = = vi _ h s lu lng Nn H2 = 1,26 + 0,082 = 1,342 m -
Khong cch gia cc tm cc l theo chiu ng ca vch ngn l : 1,342: 7 =
0,192 m - Khong cch gia cc vch ngn :l = 1,5B = 1,5.1,62 = 2,43m -
Chiu di tng cng vi vch trn 2 ngn l : L = 3.l = 3.2,43 = 7,29m - Thi
gian lu li nc trong b: sqL B HqWt 50325 , 092 , 7 . 62 , 1 . 26 , 1
. .max1max= = = =11.B tip xc li tm: B tip xc li tm c thit k khng
bao gm thit k vt bn. Nc thi sau ha trn vi clo hi c dn ti b tip xc
to qu trnh tip xc, kh trng, sau theo mng dn da ra sng vi khong thi
gian tnh tonl 30 pht; - Thi gian tip xc trong b: ) ( 8 , 2460 . 8 ,
02503060 .30 phutv lt = = =Vi : l = 250m _ chiu di mng dn t b tip
xc ti ging x V: vn tc dng chy trong mng dn - Th tch hu ch b tip xc
c xc nh: W = Qhmax . t = 1168,8.24,8:60 = 483,104(m3) - Chn xy dng
2 b, th tch mt b l : w = 483,104/2 = 241,552 (m3) N MN HC: X L NC
THI Cng ty CPTM v CNC Hong AnhTi liu ch mang tnh cht tham kho 38 -
Din tch mt bng b tip xc trn mt bng: ) ( 52 , 803552 , 24121mHwF = =
=vi H1_ chiu cao cng tc b, H = 3 - ng knh tip xc ca b: mFD 13 ,
1014 , 352 , 80 . 4 4= = =t m cn b tip xc : 96%, cn c dn ti sn phi
bn 12. Thit b o lu lng: m bo cc cng trnh x l hot ng n nh v hiu qu,
ta cn qun l lu lng nc chy vo tng cng trnh v bin ng theo tng gi. xc
nh lu lng, ta dng mng parsan. Kch thc mng c nh hnh theo tiu chun v
ty thuc vo lng nc vi gi tr tnh ton ca trm l : . qmax = 325(l/s) .
qtb = 241 ( l/s) . qmin = 115 (l/s) Theo 9.4 X l nc thi HXD 1978,
ta chn mang Pacsan: + Kh ng vn chuyn ln nht: 500l/s + Kh nng vn
chuyn nh nht: 5l/s + kch thc : b = 30cm L1 = 135cm L2 = 60cm L3 =
90cm A = 84 cm B = 60cmC = 84 cm N MN HC: X L NC THI Cng ty CPTM v
CNC Hong AnhTi liu ch mang tnh cht tham kho 39 60006000600013. Sn
phi bn : Cn sau khi ln men b Metal v cn t b tip xc c dn n sn phi bn
lm kh cn n mc cn thit. - Th tch cn t b tip xc c tnh; ) . / ( 94 ,
31000131185 . 03 , 01000.30d ng mN aWtt= = = Vi : a _ tiu chun lng
cn trong b tip xc, a = 0,03(l/nguoi.ng.d) Ntt _ dn s tnh ton theo
hm lng cn l lng - Th tch tng cng ca lng cn dn ti sn phi bn c tnh:
Wch = Whh + W0 = 90,9 + 3,94 = 94,84 (m3) Whh : th tch cn t b metan
Nn din tch sn phi bn c tnh: N MN HC: X L NC THI Cng ty CPTM v CNC
Hong AnhTi liu ch mang tnh cht tham kho 40 ) ( 64107 , 2 . 2365 .
84 , 94.365 .20mn qWFchs= = =Trong : q0 = 2m3/m2_ ti trng ln nn sn
phi.Tra bng 5.5 gio trnh x l nc thi HXD 1978, Vi nn nhn to c h thng
rt khi lm kh cn v bn hot tnh ln men n = 2,7 _ h s k n iu kin kh hu
- Chn xy dng sn phi bn chia lm 12 . Din tch mt l : f s = 6410/12 =
534,17 m2
Kch thc thit k : 22m.24m Tng din tch s dng bao gm din tch t s
dng, vn hnh Phn III THNG K CC S LIU V B TR MT BNG VCAO TRNH CNG
NGH1. Mt bng Tng mt bngtrm x l l t hp cc cng trnh n v v cc cng trnh
phc v khc c b tr bt buctheo mt s nguyn tc v k thut v v sinh. Da vo
cng sut trm theo quy phm TCN 81-84, ta c: * Phng th nghim gm c : -
Th nghim ha l. - Th nghim vi sinh vt- Dng c th nghim Vi tng kch thc
ly bng : 10.15(m) * Nh ha cht : - Kho cha clo: 6.8(m) - Nh clo :
6.8 (m) N MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu ch
mang tnh cht tham kho 41 * Nh trm bin th v t my pht d phng m bo s
lm vic tc ca trm, kch thc : 5.8 (m) * Nh hnh chnh bao gm : - phng k
thut- phng trc ban - Phng trm trng - Phng sinh hot cng nhnVi tng
kch thc: 10.16(m) * Gara xe hi v xe ca cng nhn vn hnh trm, ta dng
nh bn kin c c kch thc : 6.20 (m) * Phng bo v : 5.5 (m) * Kho cha :
10. 10 (m) V tr ca cng trnh c b tr nh trn bn v 2. Theo cao trnh mt
nc * S liu v cao mt t vd nc ngun : - Ct mt t t nhin trn mt x l :
0m. - Ct mc nc cao nht ti ca x : -1m - Ct mc nc thp nht ti ca x :
-2m * Chiu cao lm vic ca cc cng trnh n v theo tnh ton : -Mng dn
chnh ra cc cng trnh v ra b sng ly bng kch thc mng chnh vo b lng ct
c kch thc : B.H = 800.750 (m). Vi lu lng ln nht th c y h = 0,74); v
= 0,61m/s v dc mng dn i = 0,0005 - B tip xc li tmHxd = 3m - B trn
ngn c l : HXD = 1,342 (m) - B lng ngang t II : HXD = 4,5 (m) - B
Biophin cao ti: HXD = 3,5 (m) - B lng ngang t I : HXD = 4,1(m) N MN
HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu ch mang tnh cht
tham kho 42 - Mng o lu lng pacsan : HXD = 1 (m) - B lng ct ngang:
1,6 m - Ngn tip nhn: 2m - Cc ging phn phi: 2m * Tn tht s b qua cc
cng trnh theo gio trnh x l nc thi: - Qua b tip xc li tm: Htt1=0,4m
- Qua iuke dn nc t ging phn phi vo b tip xc: htt2 = 0,4m - Qua b
trn : htt3 = 0,2 m - Qua mng dn t b lng ngang t II n b trn :htt4 =
0,5 m - Qua iuke dn nc t ging phn phi vo b lng ngang t II: ( HXD =
0,6m, chuyn ng bn nc) - Ly h = 0,6m l tn tht p lc ca iu ke dn nc t
ging phn phi n ng trung tm ca cc b lng t I v II: -Qua b lng ngang t
II: htt5 =0,2 m -Qua mng dn t Biophin n b lng ngang t II: htt6 =
0,2m - Qua Biophin : htt7 = 3,5 +1,5 = 5m - Qua mng dn t b lng
ngang t I vo trm bm : Htt8 = 0,2 m - Qua b lng ngang t I: htt9 =
0,2 m - Qua iu ke dn nc t ging phn phi n b lng ngang t I:htt10 =
0,6m - Qua mng o lu lng Pac- san: htt11 = 0,1 m - Qua b lng ct
ngang : htt12 = 0,2 m - Qua mng dn t song chn rc ti b lng ct ngang:
htt13 = 0,1 m - Qua song chn rc :htt14 = 0,2 m - Qua mng dn t ngn
tip nhn n song chn rc: htt15 = 0,1m - Qua ngn tip nhn: htt16 = 0,3
m A.Xy dng cao trnh cng ngh theo tuyn nc N MN HC: X L NC THI Cng ty
CPTM v CNC Hong AnhTi liu ch mang tnh cht tham kho 43 - xy dng nc t
chy t mng dn ra b sng th cao trnh mc nc mng dn ra b sng ti ging thm
ngay by gi phi cao hn mc nc cao nht ca sng ly bng 1,5 m. Cao trnh
mc nc cao nht ca sng l -1m . Vy cao trnh mc nc ging thm l 0,5m . -
nc c th xo trn pha long tt mc nc ti ca x cn thp hn mc nc sng l 0,5
m. Mc nc thp nht sng l -2 m do y ca ming x s l -2,5m - T mng dn ti
ming x c cao chnh lch ln ta xy dng ging chuyn bc cng l ging thm
ngay b sng- Mng dn di 250 m dc i = 0,0025 nn mc nc ti st b tip xc
ca mng l :0,5+ 250.0,0025 = 1,125 m - Cao trnh mc nc ca b tip xc :
1,125 + 0,4 = 1,525 m - Cao trnh mc nc mng phn phi vo b tip xc li
tm1,525+0,4 = 1,925 m - Cao trnh mc nc b trn: : 1,925+0,2 = 2,125 m
- Cao trnh mc nc mng dn t b lng ngang t II ti b trn : 2,125 + 0,2 =
2,325m - Cao trnh mc nc b lngII: 2,325+0,3= 2,625 m - Cao trnh mc
nc mng phn phi vo b lng ngang t II: 2,625+0,2 = 2,825 m - Cao trnh
mc nc b Biophin cao ti: 2,825 + 5= 7,825 m - Cao trnh mc nc ti my
bm t mng dn ln b biophin: 0.0m - Cao trnh mc ncca mng dn vo trm bm:
0,0 +0,2 = 0,2m - Cao trnh mc nc blng ngang t I: N MN HC: X L NC
THI Cng ty CPTM v CNC Hong AnhTi liu ch mang tnh cht tham kho 44
0,2 + 0,2 = 0,4 m - Cao trnh mc nc ging phn phi ti b lng ngang t I
: 0,4 +0,6 = 1m - Cao trnh mc nc mng o lu lng Pascan 1 + 0,1 = 1,1
m - Cao trnh mc nc b lng ct ngang: 1,1 +0,2 = 1,3 - Cao trnh mc nc
mng dn t song chn rc n b lng ct ngang: 1,3 +0,1 = 1,4 m - Cao trnh
mc nc song chn rc: 1,4+0,1 = 1,5 m - Cao trnh mc nc ca mng dn t ngn
tip nhn n song chn rc: 1,5+0,1 = 1,6 m - Cao trnh mc nc ngn tip nhn
: 1,6+0,3 = 1,9m Cui cng ta c cc cao trnh mc nc ca tt c cc cng trnh
t cng thm chiu cao bo v hay tr ichiu cao xy dng c ct y cng trnh. V
thc t cho thy c cng trnh nh Biophin cao ti, b lng t I, II u c th xy
dng mt t t nhin hoc na chm na ni nh vy tit kim c khi lng o p t. B.
Xy dng cao trnh cng ngh theo tuyn bn Theo tuyn bn do c b mtan l cng
trnh x l bn cn ch yu trc khi bn cn c lm kh trn sn phi. Ta s dng bm
bn bm bn cn t b cha tm thi tip nhn bn cn t b lng I,II, my nghin rc
v b tip xc a ln b mtan. * Cc thng s tnh ton cao trnh tuyn bn : - Sn
phi bn t trn nn t t nhin, cao trnh 0.0m vi b t bao chn 1,5 m - Trn
b t ca sn phi bn t mng dn v phn phi bn c kch thc 40. 40 (cm ) v dc
i = 0,001 N MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu ch
mang tnh cht tham kho 45 - ng x cn t b ti t b mtanD200, dc i =
0,001 v p lc thy tnh l 2 m Phn IV TNH TON KINH T TRM X L 1. Gi thnh
cng trnh xy dng : C s tnh ton kinh t da vo cc ti liu hin hnh sau nh
mc d ton cp thot nc( ban hnh theo quyt nh s 441/BXD ngy 29/06/1996
ca B xy dng ) Theo tnh ton s b gi thnh xy dng cc cng trnh tnh theo
khi lng xy lp trong trm x l l : - Vi cng trnh n gin ( cng tnh c hc)
n gi : 1.500.000(ng/m3) - Vi cng tnh phc tp ( cng trnh sinh hc) n
gi : 2.000.000( ng/m3) - Vi cng trnh sn phi ct, sn phi bn th n gi :
70.000(ng/m3) N MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu
ch mang tnh cht tham kho 46 K.lngThnh tinThit bGi thnhSTTCng trnh
m3 100010001000 1Ngn tip nhn 9,21380013800 2Song chn
rc1,8427605533312 3B lng ctngang23,1134665673341562 4B lng ngang t
I22054156000326300456213 5B Biophin4945,571750001435000545142 6B
lng ngang t II646,274923000854000123123 7Mng trn36,4553215212154 8B
tip xc li tm336,588540851231500781212 9B
mtan132,9527451508151232454614 10Sn phi ct302,7(m2)14100054562 11Sn
phi bn19914,36882000445623 12Trm bm 925,51355250271212121312 13Trm
kh trng821320002500044121 14Trm kh nn6080000017000054465 15
Tng20340253004072825456254 2.Gi thnh qun l: a. Chi ph in nng: - Chi
ph cho trm bm nc thi : an nT H QEdc b.3600 . . . 102365 . . . .
100001 = Trong :. Q: Lu lng trm bm 1177,5 m3/h N MN HC: X L NC THI
Cng ty CPTM v CNC Hong AnhTi liu ch mang tnh cht tham kho 47 H0: p
lc bm 11,5 m T: thif gian hot ng 24 h a: gi in A = 2000/KWh nb: hiu
sut nb = 0,8 ndc: hiu sut ng c ndc = 0,65 E1 = 1,09 . 109 (ng) +,
in thp sng: ly chi ph in thps sng bng 2% in sn xut: E2 = 0,02E1 =
1,09.109.0,02 = 0,218.109 ng = 2,8 triu ng b, Chi ph ho cht: + Lng
clo cn kh tng 1 nm: VTB = 2,76.24.365 = 22425,6kg/nm Gi tin 1kg clo
l 4500 : Tng s tin chi ph cho ho cht: Khc = 22425,6.4500 =100,91(
triu ng) c. Chi ph vn hnh v lng cng nhn: Cngnhn vn hnh qun l trm bm
nc thi : 5 ngi Cng nhn vn hnh trm x l 20 ngui Lng cng nhn:
1.500.000(ng/thng) L = 25.1500000. 12 = 450 triu ng d Chi ph khu
hao: * chi ph khu hao c bn ca cng trnh: chi ph khu hao c bn ly bng
10% gi thnh xy dng: Kkh = 10%GXD= 10%25452654= 2545,63 triu ng *
chi ph sa cha ly bng 3% gi thnh xy dng: Ksc = 3%GXD = 763,7 ( triu
ng) Tng chi ph qun l hng nm: Gq1 = E1 +E2 + Kch + L + Kkh + Ksc =
6000( triu ng) Gi thnh x l 1m3 nc thi:) / ( 1000365 1990010 600036m
dongQGgql== = N MN HC: X L NC THI Cng ty CPTM v CNC Hong AnhTi liu
ch mang tnh cht tham kho 48 Vn u t xy dng tnh cho 1 m3 nc thi: 610
5 , 1 = =QGXDV (ng.m3) N MN HC: X L NC THI Cng ty CPTM v CNC Hong
AnhTi liu ch mang tnh cht tham kho 49 TI LIU THAM KHO :
1.PGS.TS.Trn c H. X l nc thi th.Nh xut bn khoa hc k thut.H ni- 2006
2.X l nc thi_ PGS.PTS Hong Hu, H Kin trc H Ni 3.Tnh ton thit k cc
cng trnh x l nc thi.TS Trnh Xun Lai 4.TS Trn Hiu Nhu, cc bng tnh
ton thy lc cng v mng thot nc
