Desulphurisation Systems

For the desulphurisation of sweet reserve or must, we build desulphurisation columns according to the patented STRASSBURGER process – namely of glass. This proves to be particularly resistant to aggressive vapours and is easy to clean.

The advantages of our desulphurisation systems:

  • exchange column made of glass
  • low maintenance and servicing costs
  • particularly easy cleaning
  • no taste impairment of the must

The heart of the STRASSBURGER desulphurisation system, the exchange column, is made of glass due to the aggressive vapours as well as the inflow line and the sprinkler where the highest temperatures are present. The glass parts are particularly easy to clean. Other parts and lines in contact with the product are realised in high-alloyed chrome steel (V4A). Other parts in normal chrome steel. The glass column is hooked for stability reasons into a pipe frame. The patented STRASSBURGER process dispenses with a complex vacuum pump, the maintenance and servicing costs are low.

A preferably pure lime (e.g. STRASSBURGER special lime), which is mixed in the (included in the delivery contents) mixing container enables a gentle desulphurisation and a problem-free (residue-free) cleaning of the lime milk carrying parts. The lime consumption amounts to approx. 2 kg per 1000 litres.

Not included in the delivery contents are the steam generator and a potentially required cooling unit. The system being during operation under a pressure of 1 bar is not subject to a TÜV acceptance test.

By means of a rotary pump the sulfurized must is passed through the heat exchanger and gradually heated. Preheating is done in countercurrent with backflowing desulfited must (heat recovery). Final heating is performed in countercurrent with saturated steam.

The must has now reached 110°C and is spread by a sprinkler over ceramic rings in exchange column. The sulfur dissolved in the must becomes steam. 

Steam formed in the lime milk tank by heating passes the  column in upward direction (meeting the must) and strips the sulfuric vapors that have been set free.

 

Verfahrensablauf bei Entschwefelungsanlagen

 

A rotary pump circulates lime milk from the lime milk tank into the gas jet washer which is working according to the injection method. By this “underpressure” the sulfuric vapors are sucked, mixed with lime milk in the pipe of the gas jet heat washer and by this procedure “washed” (neutralized). Via adroplet separator clean vapors stream again into the cycle.

The must discharged at the bottom of the column is desulfited by approx. 90 % depending upon the temperature of the must and the pH index (the higher the pH index the firmer the sulfur is tied up).

The desulfited must is fed again into the plate heat exchanger in order to heat the must not yet desulfited flowing in. After this heat recovery a temperature of 5-10 °C above the inlet temperature is reached.

If the inlet temperature is already very high, the must can be cooled down with water or cooling liquid in a third step. A rotary pump at the outlet of the heat exchanger ensures the regulated flow of the must.

Technical details

 Energy consumption
TypeDesulfiting capacity
l/h

Number of
columns

Dimensioins
L x B x H mm
electric
kW
vapor
kg/h
consumption
kg/h
KOL 500-ND 15050012000 x 1500 x 3800410050
KOL 1000-ND 200100013000 x 1800 x 3800510070
KOL 3000- ND 300300013600 x 2000 x 420010200120
KOL 5000-ND 500500013600 x 2000 x 450012300180
KOL 1000-2ND5001000023600 x 3600 x 470015600300