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Reactor tanks for biogas
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Assentoft Silo supplies biogas reactor and storage tanks made from bolted steel plates, insulated, if required. Twenty-five years of experience in biogas projects and other major industrial projects throughout Europe makes Assentoft Silo an attractive partner, providing active coaching and help in designing your complete system.
Design of your biogas plantIn the tender and design phase, we prepare 3D drawings and films to illustrate the plant.
We help designing the plant and positioning the spools, components and equipment
In cooperation with our experienced project managers design and placement of connectors and components is
determined and illustrated in detailed drawings.
Biogas tanks from Assentoft Silo A/S
We often perform many versions of a plant, before the final design is determined.
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Choosing the right reactor tank
■ Selection and composition of materials - glass enameled, stainless steel, epoxy coated or galvanized steel sheets - as well as a choice between insulated steel roof or membrane roof.
■ Sizes from 500 m³ to 7,000 m³ with optional combination of height and diameter.
■ Suitable for center stirrer, side mounted stirrer and gasmix.
■ Used as both primary and secondary reactor vessels and storage tanks.
■ Minimization of heat loss by effectively insulation of the tank wall and the roof.
Documentation of the plantA thorough static calculation is provided with every tank according to current Eurocodes standards, taking local wind loads, snow loads, operating pressure, vacuum, and influences from stirrer into consideration. This static calculation can be used for project approval by the authorities.
Assentoft Silo’s reactor tanks provide maximum flexibility in:
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In collaboration with the two leading manufacturers of insulation, Assentoft Silo has developed a calculation of heat losses in the steel and concrete reactor tanks. To be used when comparing total costs for a project.
Help calculating operating and construction costs for a plant
Above is an example of a complete estimate for a customer in Denmark.
Enter the following Steel reactor tank Concrete reactor tank
The price for heating i kW DKK 0.25 DKK 0.25
Price pr. kW DKK 0.25 DKK 0.25
Interest rate 6% 6 %
The cost of the tank is amortirized over 20 years 20 years
Diameter 17.01 m 32.00 m
Hight - tank wall 17.75 m 5.00 m
Insulation thickness: roof 200 mm 20 mm
Insulation thickness: wall 200 mm 100 mm
Insulation thickness: foundation 150 mm 150 mm
Tank price incl. insulation, foundation and agitator DKK 3,300,000 DKK 2,700,000
Construction grants 30 % 30 %
Total yearly expenses for the whole tank Steel reactor tank Concrete reactor tank
Thermophillic Mesophillic Thermophillic Mesophillic
Volume gross 4030 m³ 4020 m³
Volumes net with 0.5 mm freeboard 3890 m³ 3620 m³
Price, deducting the construction grant DKK 2,310,000.00 DKK 1,890,000.00
Costs,tank investment ,amort.over: 20 years DKK 201,396 DKK 201,396 DKK 164,779 DKK 164,779
Costs for heat loss per year, roof DKK 5,771 DKK 2,918 DKK 140,403 DKK 89,311
Costs for heat loss per year, tank wall DKK 23,296 DKK 11,780 DKK 19,396 DKK 12,274
Costs for heat loss per year, foundation DKK 10,961 DKK 5,549 DKK 31,034 DKK 19,639
Cost of power for stirring per year DKK 31,536 DKK 31,536 DKK 78,840 DKK 78,840
Cost for pumping the biomass, per year
Cost for pumping the gas, per year
Cost of maintenance, per year
Other operating expenses, per year
Annual expenditure, total DKK 272,960 DKK 253,180 DKK 434,453 DKK 364,842
Note. You will need 3 stirrers for a concrete tank but only one top-mounted stirrer for a steel tank.
Comparison of a 4030 m³ steel tank and a 4020 m³ concrete tank
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In-house production of components for biogas plants
■ Assentoft Silo buys steel in large quantities, directly at the steel mills.
■ Angle iron, ladders, platforms, railings, spools,flanges, etc. are efficiently produced in our own workshop.
■ Flanges are welded on to pipes and bends, galvanized or sandblasted and coated on our own plant.
■ Electric control is designed and produced in our own electrical workshop.
Reactor Tanks: 2 x 1,500 m³ for the demonstration plant Ringkøbing Skjern, built by Assentoft Silo in June 2012 for ComBigaS.
Tegnet af
Kontrolleretaf
Date Name
Projekt nr.:Matr.:
Silovej 1, Assentoft, DK - 8900 RandersTlf. 86494566 - Fax. 86494863E-mailadr. - [email protected]
COPYRIGHT:Denne tegning er vor ejendom og må ikke forevises, overlades til uvedkommende, kopieres eller på anden måde anvendes uden vor tilladelse.
KontrolleretafSælger/Projektleder
assentoft siloDEMONSTRATIONSANLÆG
470010-101
sk18-04-2012
470010
470010-101.idw
COMBIGAS demonstrations anlæg
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2
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3
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5
5
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7
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A A
B B
C C
D D
E E
F F
Purchasing services from Assentoft Silo includes
25 years of experience in building biogas tanks, includingDenmark’s first tank from 1988 to Nordvestjysk Folkecenter, and more than 30 reactor tanks in Denmark subsequent.
When buying tanks from Assentoft Silo, you are as close as possible to the tank manufacturer. Therefore, the quality is high - and the price reasonable.
Enter the following Steel reactor tank Concrete reactor tank
The price for heating i kW DKK 0.25 DKK 0.25
Price pr. kW DKK 0.25 DKK 0.25
Interest rate 6% 6 %
The cost of the tank is amortirized over 20 years 20 years
Diameter 17.01 m 32.00 m
Hight - tank wall 17.75 m 5.00 m
Insulation thickness: roof 200 mm 20 mm
Insulation thickness: wall 200 mm 100 mm
Insulation thickness: foundation 150 mm 150 mm
Tank price incl. insulation, foundation and agitator DKK 3,300,000 DKK 2,700,000
Construction grants 30 % 30 %
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Piping
Pipes, bends, spools etc. of any size can be supplied according to customer requirements Produced, sandblasted and coated at our factory in North Jutland.
Control panels for controlling biogas plantsWe have a large production of electric control pa-nels for our silo plants, also for industrial purposes and biogas.
Our electric control panels are made with PLC and touch screen for management and monitoring of the biogas plant. Including connection to analog and digital input signals and perhaps connection to the internetfor external monitoring and service. We can also offer GSM based alarm system, calling up to more than one priority-controlled numbers for voice or text message.
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Assentoft Silo secures a satisfying result that lasts!
- 500 industrial projects and 4,000 farm silo projects throughout Europe is the proof.
Reactor tanks from Assentoft Silo are designed for 30 years of operation.
Standard operating pressure in a steel tank is 0.03 mbar or 300 mm water column, whichmoves the gas on in the process without a gas blower.
The tanks are suitable for both thermophilic and mesophilic operation - or switching between the two types.
Tanks, where the diameter and height corresponds to each other, is less expensive to stir, and it is easier to obtain an effective stirring without any dead zones and channeling. This provides higher gas production and more efficient use of the tank.
With bolted tanks a short erection time is required , and there is no hot work on the site.
The 2,000 m³ reactor tank built for ComBigaS east of Berlin in 2011 (before insulation).
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In Denmark and other European countries, Assentoft Silo delivers effective and reliable project management
3.300 m3 silo for cement delivered in France, 2009.
Assentoft Silo provides complete tank or silo solutions also for storage of grain, maize kernel, cement, sand, bitumen, fish oil etc. In addition we act as subcontractor of tanks and silos for leading Danish suppliers of e.g. concrete plants, asphalt plants and flue gas cleaning filters.
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lumei
nthe
silos
hellm
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tftSil
td
dlt
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lume i
n the
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ilo stan
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ate s
izes 2
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x 1.1
79)
Volum
e in t
he si
lo sh
ell m
(Asse
ntoft S
ilo stan
dard pl
ate s
izes 2
.4288
x 1.1
79)
45
67
89
1011
1213
1415
1617
1819
2021
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f ring
s4
56
78
910
1112
1314
1516
1718
1920
21No
. of r
ings
45
67
89
1011
1213
1415
1617
1819
2021
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t47
859
671
483
295
010
6811
8613
0414
2215
4016
5817
7618
9420
1121
2922
4723
6524
83He
ight
4,78
5,96
7,14
8,32
9,50
10,68
11,86
13,04
14,22
15,40
16,58
17,76
18,94
20,11
21,29
22,47
23,65
24,83
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513
915
316
718
119
520
822
223
625
026
427
829
13,8
75
5670
8498
112
125
139
153
167
181
195
208
222
236
250
264
278
291
464
681
101
121
141
161
181
200
220
240
260
280
300
320
340
360
380
400
420
4,64
681
101
121
141
161
181
200
220
240
260
280
300
320
340
360
380
400
420
5,41
711
013
716
419
121
924
627
330
032
735
438
140
843
646
349
051
754
457
15,4
17
110
137
164
191
219
246
273
300
327
354
381
408
436
463
490
517
544
571
618
814
417
921
525
028
532
135
639
242
746
349
853
356
960
464
067
571
174
66,1
88
144
179
215
250
285
321
356
392
427
463
498
533
569
604
640
675
711
746
6,18
814
417
921
525
028
532
135
639
242
746
349
853
356
960
464
067
571
174
669
69
182
227
272
316
361
406
451
496
541
585
630
675
720
765
810
855
899
944
6,96
918
222
727
231
636
140
645
149
654
158
563
067
572
076
581
085
589
994
477
310
225
280
335
391
446
501
557
612
667
723
778
834
889
944
1000
1055
1110
1166
7,73
1022
528
033
539
144
650
155
761
266
772
377
883
488
994
41.0
001.0
551.1
101.1
668,5
011
272
339
406
473
540
607
674
741
808
875
942
1.009
1.076
1.143
1.210
1.276
1.343
1.410
8,50
1127
233
940
647
354
060
767
474
180
887
594
21.0
091.0
761.1
431.2
101.2
761.3
431.4
109,2
812
323
403
483
563
642
722
802
881
961
1.041
1.121
1.200
1.280
1.360
1.439
1.519
1.599
1.679
9,28
1232
340
348
356
364
272
280
288
196
11.0
411.1
211.2
001.2
801.3
601.4
391.5
191.5
991.6
7910
0513
380
473
567
660
754
847
941
1034
1128
1222
1315
1409
1502
1596
1689
1783
1876
1970
10,05
1338
047
356
766
075
484
794
11.0
341.1
281.2
221.3
151.4
091.5
021.5
961.6
891.7
831.8
761.9
70,
1082
1444
054
965
776
687
498
310
9112
0013
0814
1715
2516
3417
4218
5119
5920
6821
7622
8510
,8214
440
549
657
766
874
983
1.091
1.200
1.308
1.417
1.525
1.634
1.742
1.851
1.959
2.068
2.176
2.285
1160
1550
563
075
487
910
0411
2812
5313
7715
0216
2617
5118
7520
0021
2522
4923
7424
9826
2311
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505
630
754
879
1.004
1.128
1.253
1.377
1.502
1.626
1.751
1.875
2.000
2.125
2.249
2.374
2.498
2.623
12,37
1657
571
785
81.0
001.1
421.2
841.4
251.5
671.7
091.8
501.9
922.1
342.2
762.4
172.5
592.7
012.8
422.9
8412
,3716
575
717
858
1.000
1.142
1.284
1.425
1.567
1.709
1.850
1.992
2.134
2.276
2.417
2.559
2.701
2.842
2.984
1314
1764
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996
911
2912
8914
4916
0917
6919
2920
8922
4924
0925
6927
2928
8930
4932
0933
6913
,1417
649
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969
1.129
1.289
1.449
1.609
1.769
1.929
2.089
2.249
2.409
2.569
2.729
2.889
3.049
3.209
3.369
13,14
1764
980
996
91.1
291.2
891.4
491.6
091.7
691.9
292.0
892.2
492.4
092.5
692.7
292.8
893.0
493.2
093.3
6913
9218
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907
1086
1266
1445
1625
1804
1983
2163
2342
2521
2701
2880
3059
3239
3418
3597
3777
13,92
1872
890
71.0
861.2
661.4
451.6
251.8
041.9
832.1
632.3
422.5
212.7
012.8
803.0
593.2
393.4
183.5
973.7
77,
1469
1981
110
1112
1114
1016
1018
1020
1022
1024
1026
0928
0930
0932
0934
0936
0938
0840
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0814
,6919
811
1.011
1.211
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1.610
1.810
2.010
2.210
2.410
2.609
2.809
3.009
3.209
3.409
3.609
3.808
4.008
4.208
1546
2089
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2013
4115
6317
8420
0622
2724
4826
7028
9131
1333
3435
5637
7739
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4146
6315
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1.120
1.341
1.563
1.784
2.006
2.227
2.448
2.670
2.891
3.113
3.334
3.556
3.777
3.998
4.220
4.441
4.663
16,24
2199
11.2
351.4
791.7
231.9
672.2
112.4
552.6
992.9
433.1
883.4
323.6
763.9
204.1
644.4
084.6
524.8
965.1
4116
,2421
991
1.235
1.479
1.723
1.967
2.211
2.455
2.699
2.943
3.188
3.432
3.676
3.920
4.164
4.408
4.652
4.896
5.141
1701
2210
8713
5516
2318
9121
5924
2726
9529
6332
3034
9837
6640
3443
0245
7048
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4217
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1.087
1.355
1.623
1.891
2.159
2.427
2.695
2.963
3.230
3.498
3.766
4.034
4.302
4.570
4.838
5.106
5.374
5.642
17,01
221.0
871.3
551.6
231.8
912.1
592.4
272.6
952.9
633.2
303.4
983.7
664.0
344.3
024.5
704.8
385.1
065.3
745.6
4217
7823
1188
1481
1774
2067
2360
2652
2945
3238
3531
3824
4117
4409
4702
4995
5288
5581
5874
6166
17,78
231.1
881.4
811.7
742.0
672.3
602.6
522.9
453.2
383.5
313.8
244.1
174.4
094.7
024.9
955.2
885.5
815.8
746.1
6618
5524
1294
1613
1931
2250
2569
2888
3207
3526
3845
4163
4482
4801
5120
5439
5758
6076
6395
6714
18,55
241.2
941.6
131.9
312.2
502.5
692.8
883.2
073.5
263.8
454.1
634.4
824.8
015.1
205.4
395.7
586.0
766.3
956.7
1419
,3325
1.404
1.750
2.096
2.442
2.788
3.134
3.480
3.826
4.172
4.518
4.864
5.210
5.556
5.901
6.247
6.593
6.939
7.285
19,33
251.4
041.7
502.0
962.4
422.7
883.1
343.4
803.8
264.1
724.5
184.8
645.2
105.5
565.9
016.2
476.5
936.9
397.2
8520
,1026
1.518
1.893
2.267
2.641
3.015
3.389
3.764
4.138
4.512
4.886
5.260
5.635
6.009
6.383
6.757
7.131
7.506
7.880
20,10
261.5
181.8
932.2
672.6
413.0
153.3
893.7
644.1
384.5
124.8
865.2
605.6
356.0
096.3
836.7
577.1
317.5
067.8
8020
8727
1637
2041
2445
2848
3252
3655
4059
4462
4866
5269
5673
6076
6480
6883
7287
7691
8094
8498
20,87
271.6
372.0
412.4
452.8
483.2
523.6
554.0
594.4
624.8
665.2
695.6
736.0
766.4
806.8
837.2
877.6
918.0
948.4
98,
2165
2817
6121
9526
2930
6334
9739
3143
6547
9952
3356
6761
0165
3569
6974
0378
3782
7187
0591
3921
,6528
1.761
2.195
2.629
3.063
3.497
3.931
4.365
4.799
5.233
5.667
6.101
6.535
6.969
7.403
7.837
8.271
8.705
9.139
2242
2918
8923
5528
2032
8637
5142
1746
8251
4856
1360
7965
4470
1074
7579
4184
0788
7293
3822
,4229
1.889
2.355
2.820
3.286
3.751
4.217
4.682
5.148
5.613
6.079
6.544
7.010
7.475
7.941
8.407
8.872
9.338
23,19
302.0
222.5
203.0
183.5
164.0
144.5
135.0
115.5
096.0
076.5
057.0
047.5
028.0
008.4
988.9
969.4
959.9
9323
,1930
2.022
2.520
3.018
3.516
4.014
4.513
5.011
5.509
6.007
6.505
7.004
7.502
8.000
8.498
8.996
9.495
9.993
2474
3223
0028
6734
3440
0145
6751
3457
0162
6868
3574
0279
6885
3591
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6910
236
1080
311
370
24,74
322.3
002.8
673.4
344.0
014.5
675.1
345.7
016.2
686.8
357.4
027.9
688.5
359.1
029.6
6910
.236
10.80
311
.370
24,74
322.3
002.8
673.4
344.0
014.5
675.1
345.7
016.2
686.8
357.4
027.9
688.5
359.1
029.6
6910
.236
10.80
311
.370
2629
3425
9732
3638
7645
1651
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9664
3670
7677
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9696
3610
275
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511
555
1219
526
,2934
2.597
3.236
3.876
4.516
5.156
5.796
6.436
7.076
7.716
8.356
8.996
9.636
10.27
510
.915
11.55
512
.195
,27
8336
2911
3628
4346
5063
5781
6498
7215
7933
8650
9368
1008
510
802
1152
012
237
1295
513
672
27,83
362.9
113.6
284.3
465.0
635.7
816.4
987.2
157.9
338.6
509.3
6810
.085
10.80
211
.520
12.23
712
.955
13.67
229
3838
3243
4043
4842
5641
6441
7240
8039
8839
9638
1043
711
237
1203
612
835
1363
514
434
29,38
383.2
434.0
434.8
425.6
416.4
417.2
408.0
398.8
399.6
3810
.437
11.23
712
.036
12.83
513
.635
14.43
430
,9240
3.594
4.480
5.365
6.251
7.137
8.022
8.908
9.794
10.67
911
.565
12.45
113
.336
14.22
230
,9240
3.594
4.480
5.365
6.251
7.137
8.022
8.908
9.794
10.67
911
.565
12.45
113
.336
14.22
234
0244
4349
5420
6492
7564
8635
9707
1077
911
850
1292
213
994
1506
534
,0244
4.349
5.420
6.492
7.564
8.635
9.707
10.77
911
.850
12.92
213
.994
15.06
534
,0244
4.349
5.420
6.492
7.564
8.635
9.707
10.77
911
.850
12.92
213
.994
15.06
537
1148
5175
6451
7726
9001
1027
711
552
1282
714
103
1537
816
654
37,11
485.1
756.4
517.7
269.0
0110
.277
11.55
212
.827
14.10
315
.378
16.65
440
2052
6074
7570
9067
1056
412
061
1355
815
054
1655
140
,2052
6.074
7.570
9.067
10.56
412
.061
13.55
815
.054
16.55
146
,3960
8.086
10.07
912
.072
14.06
516
.057
18.05
046
,3960
8.086
10.07
912
.072
14.06
516
.057
18.05
0
10
All-welded silos and tanks
Rational storage and handling of dry products/residues and liquid raw materials for biogas production. Welded tanks and silos from 10 m³ and up to 150 m³, designed, produced and supplied on site.
On our own factory in North Jutland 15 certified welders produce tanks, silos and piping systems. The tanks are sandblasted and epoxy treated in our own paint shop and insulated, if required by customer.
The tanks are made as standard products – with the possibility of equippingafter customer demand.Diameters from 2546 to 4500 mm.
11
Example of equipment on an all-welded silo
WAM SILO TOP FILTER WITH FILTER FLANGE
ALUMINIUM ACCESS HATCH
LEVEL INDICATOR
WELDED LADDER
POSITIVE/NE-GATIVE PRES-SURE VALVE
ROOF RAILING
STEEL ACCESS HATCH
CONE WITH VIBRATION BOTTOMH
DAMPER (TURNABLE)
CAPACITIVE SENSOR
LIME AUGER
CONTROL PANEL
SILO WALL TO GROUND - WITH DOOR
Silovej 1, Assentoft ·
DK-8960 Randers SØ
Tlf.: +45 86 49 45 66
Fax: +45 86 49 48 63
Email: [email protected]
www.assentoftsilo.dk
DE
VISI
ON
155
008
