Used APV Evaporation Plant

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Used APV Evaporation Plant

Manufacturer: APV
Model: Evaporation Plant

The Plant that follows was previously used for Cider Evaporation. It is however possible that this standard plate evaporation system which was manufactured by APV could be converted for other evaporation The information to follow is the description of the Plant including an itemised listing of equipment which is currently located at our works in Rossington, Doncaster.

The Evaporator is a specially designed plate heat exchanger. It comprises a number of pressed stainless steel plates separated by rubber gaskets and clamped between a fixed steel had and a movable steel head. The plates are made with connection ports so that on one side of each plate is vacuum steam condensing at approximately 70°C. On the other side is cider under vacuum and boiling at approximately 50°C as it runs in a thin film down the plate. The Evaporator is therefore classed as a Falling Film Evaporator.

Evaporation takes plate continuously but in two distinct stages. The product plates are divided vertically down the middle. The first stage of evaporation takes plate on one side of the plates and the second stage takes place on the other.

A mixture of vapour and boiling liquid passes from the Evaporator to the separator. The separator is the vertical cylindrical vessel on support legs. It has a tangential inlet from both sides of the evaporation plates. The liquid separated from the vapour in the separator is pumped to the second stage since it is only partially de-alcoholised. The liquid from the second stage, being fully de-alcoholised cider, is pumped out of a collection chamber in the dust between the second stage and the separator and is transferred to the two horizontal product storage tanks. The vapour containing water and alcohol passes to the main condenser which is a horizontal shell and tube heat exchanger. A large flow of cooling water passes through the tubes and the condensed alcoholic vapour collects in the bottom of the shell.

A water ring vacuum pump creates the partial vacuum in the Evaporator, separator and main condenser. It draws the uncondensed vapour and gases from the main condenser through a second condenser – a vent condenser – to ensure that all traces of alcohol are condensed and removed. This ensures that the vacuum pump does not operate with an alcoholic liquid ring which would contravene H M Customs & Excise Regulations!.

The vent condenser is a plate heat exchanger and uses glycol at approximately 0°C to condense the alcohol.

Alcohol from the two condensers is pumped to the two vertical alcohol storage tanks ready for sale (for vinegar production) or for disposal to drain in accordance with H M Customs & Excise Regulations.

Only uncondensible gases are drawn through the vacuum pump

The Evaporator is located high on a platform so that there is sufficient pressure on the inlet of the interstage liquid transfer pump and product transfer pump to enable them to operate. The vent condenser is located on the platform so that the condensed alcohol can drain into the alcohol transfer pump There is a third plate heat exchanger located on the ground floor It is split into four sections for pre-heating cider to the Evaporator and cooling the product. The cider feed is heated using outgoing product, steam condensate from the Evaporator and hot water from a hot water set. The product is cooled using incoming cider feed and glycol.

There is a packaged refrigeration plant on the ground floor which provides the cold glycol for the product cooker and the vent condenser.

There are seven control loops on the plant and their microprocessor bases three term controller (with proportional, integral and derivative action) are mounted on the instrument panel. the following process variables have to be controlled.

1. Cider feed temperature
2. Steam flow to evaporator
3. Vacuum on the cider side of the evaporator ( e. e boiler point of the cider)
4. Flow rate of cider to Evaporator
5. Temperature of cooled product
6. Temperature of cooled product
7. Temperature of uncondensed gases (glycol control to vent condenser)
8. Temperature of refrigeration plant condenser feed water.

Relevant facts on the Evaporator:

Feed Rate 4200 1 per hr (925 gall per hr)
Alcohol concentration infeed 8.5% by volume
Evaporation rate 40% by volume on each stage of two stages
It produces in 12 hours sufficient LA cider for two shifts production at 100% on S1 line.
Alcohol concentration in condensed vapour 15-20% by volume.

(Further information available includes flow diagram and wiring diagram)


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Operating instructions, manuals and drawings available.

Additional information

Motor Size

Equipment to sell? We are interested.

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