AV-ME-WI-15 Operation Instruction for Falling Film Evaporator

7/27/2019 AV-ME-WI-15 Operation Instruction for Falling Film Evaporator.

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Department: MaintenanceDOC. No. : AV/ME/WI/015

Page No. : Page 1 of 3

Issue Date: 01.03.06Revision No. Date : !00)-01.03.06

"u#$ect %peration instruction &or ''E.

REVISIONS

Revision

No.

Revised

Pages

Revision Description Date of Revision

00 0 Original Issue 01.03.06

Prepare( )* Approve( )* Aut+ori,e( #*

Maintenance Officer Management Representative Factor Manager

!C"#$$%F%&D: %nterna' (se On' !


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Page No. : Page of 3



1. Commissioning:1. Check the arability of steam at required pressure in the steam header.

2. Open main steam valve of the steam header then drain out all the condensate from

the header.

3. Open the sealing ater main hand valve after the sealing ater tank and also the

hand valve placed in front of the single !.!. pumps.

. Check the availability of the instrument air hich is at a minimum pressure of "

kg#!q. cm $g%.

!. Close all openings through hich air can penetrate into the plant.

2. Vac""m Prod"ction:1. !tart all pumps one after the another but alays ait so long until liquid appears in

the separator I. then start the corresponding supply pump.

2. &he plant is operated ith ater. 'nsure the continuous availability of the ater in

balance tank. &he flo rate be controlled through the flo regulating valve provided

at the discharge line of the feed pump.

3. !tart the cooling ater pump and open sloly appro(. half od the cooling ater

valve.

. Once ater is circulated through plant) open seal ater to vacuum pump and sitchon vacuum pump.

3. Start "p of t#e p$ant %it# steam:1. If the vacuum has reached appr. 600mm open sloly the steam valve at the

thermo*compressor to the half of the set point.

2. !tart the condensate pump.

3. &he set point at the steam pressure controller has to be ad+usted to desiredsteam pressure. &he pneumatic has to be sloly open by turning the hand

remote ad+uster of the steam pressure controller and after this to ad+ust an

automatic.

. ,hen the vacuum has reached 6-0 mm ad+ust the pressure at the thermo

compressor to the nominal pressure or to that pressure hich has given the

correct density last time.

!. d+ust the flo quantity to nominal quantity.&. d+ust the nominal value at the temperature controller to the desired value.

!loly open the steam valve of the temperature controller.

'. In case of /!I unit for steriliation) open the steam valve at the inlet of stem

line to sterilier and set the desired valve of temperature through controller.





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!. C#anging Over to Prod"ct ( Evaporation Process:

1. s soon the plant is orking steadly ith ater and the separators have a

minimum level) the product valve has to be opened.

2. ,hen the product is appearing in the separator of the final stage or it is

appeared in the final discharge line. &he outlet quantity has to be conveyed

back into the balance tank.

3. ,hen the concentration has reached desired concentrate) the concentrate hasto be filled in to the concentrate tank by changing over the valve provided in

the discharge end.

. /uring the ne(t half hour) the orking condition has to be controlled

regularly and have to be read+usted to obtain the nominal conditions. s soonas they are achieved) the controllers have to be put on automatic.

&. Stopping of P$ant:

1. !top the instrument air supply.

2. the main stem valve has to be closed.

3. the flo quantity has to be reduced to appear 1# of the quantity during

ma(imum operation.

. ,ait until the plant has cool don) then the supply pumps have to be

sitched off. s soon as all separators are empty) all pumps have to besitched off one after the other. &he cooling ater pumps have to be stopped.

!. &o start the plant again) all controllers have to be sitched on hand.&. ir cocks have to be opened.

Preca"tions:

1. In case of failure of electricity) the steam supply is shut don. &he solenoid valve

closes the air supply in the pneumatic control valve) so that this valve closes. Ifthe failure of electricity has ended) one must pump out all the product of the plant)

the evaporator must be cleaned and started up again.

2. In case of steam failure) close the product supply. ,hen the steam is available

again) the evaporator must be emptied 2 Cleaned and after this started again.

3. If the cooling ater supply is broken don) the total plant must be shutdon

immediately.




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AV-ME-WI-15 Operation Instruction for Falling Film Evaporator