摘要:
The invention relates to a method and apparatus for preparing an ethanol/water mixture, in which fermentable raw materials (1) and the necessary auxiliary substances (2, 3) are fed into a reactor (4), the fermentable raw materials being selected from sugars and raw materials capable of being hydrolyzed into fermentable sugars; the raw materials are fed into the reactor (4), and the ethanol/water mixture is separated from the reactor fermentation solution in an evaporator (13); and non-fermented matter (6) is removed from the reactor. According to the invention, the reactor (4) fermentation solution is continuously being fed into a first falling-film evaporator (13) while the fermentation is going on; the ethanol/water mixture is evaporated in the first falling-film evaporator (13), and the evaporate (14) obtained from the evaporator (13) is condensed, and the condensed ethanol/water mixture is concentrated in a second falling-film evaporator (18), which is arranged in series with the first falling-film evaporator (13); from the second evaporator (18), water is removed as underflow (20); and non-volatile matter (15) is removed from the first evaporator (13) and is recycled to the reactor (4).
摘要:
The invention relates to a method and an apparatus for processing waste (1) containing fermentable raw materials selected from sugars and raw materials such as starch and cellulose capable of being saccharified into fermentable sugars. The method includes a crushing step for forming fine-divided waste (30), a saccharification step for saccharifying with saccharifying enzymes (20) the fine-divided waste (30) to obtain saccharified fine-divided waste (31), a fermentation step for fermenting with an ethanol-producing microorganism (23) said saccharified fine-divided waste (31) to obtain fermented fine-divided waste (32) containing mixture of ethanol and water (25), and a vaporization step for at least partly separating by vaporization said mixture of ethanol and water (25), a dehydrating step for at least partly dehydrating said fermented fine-divided waste (32) to form dry matter (24).
摘要:
The invention relates to a method and an apparatus for dewatering mixture of ethanol and water. The method for dewatering mixture of ethanol and water in a pervaporation process arranged to dewater ethanol, to the retentate, from water as enriched to the permeate. In the method at least one of the streams of the permeate that is about to be cooled, before the entry of the stream into a vaporizer (2) arranged to vaporize at least partly once processed ethanol-water mixture by the pervaporation process, or another permeate stream upstream of pervaporation unit, is taken (HEXI) in the cooling phase of said at least one of the streams of the permeate, so that said heat taken is at least partly directed as secondary energy into the use for heating of the mixture of the ethanol and the water that is entering into the pervaporation unit, which is arranged to dewater the mixture of the ethanol and water by pervaporation. The invention relates also to a heat exchanger, use of the heat exchanger in general, but specifically in a pervaporation process for de-watering of ethanol-water mixture. The invention also relates to pervaporation unit comprising such a heat exchanger, and also to utility unit for ethanol rectification using the heat exchanger.
摘要:
The invention relates to a method and an apparatus for processing waste (1) containing fermentable raw materials selected from sugars and raw materials such as starch and cellulose capable of being saccharified into fermentable sugars. The method includes a crushing step for forming fine-divided waste (30), a saccharification step for saccharifying with saccharifying enzymes (20) the fine- divided waste (30) to obtain saccharified fine-divided waste (31), a fermentation step for fermenting with an ethanol-producing microorganism (23) said saccharified fine-divided waste (31) to obtain fermented fine-divided waste (32) containing mixture of ethanol and water (25), and a vaporization step for at least partly separating by vaporization said mixture of ethanol and water (25), a dehydrating step for at least partly dehydrating said fermented fine-divided waste (32) to form dry matter (24).
摘要:
The invention relates to an apparatus for recovery of organic compounds and drying organic mass. The apparatus comprises a dryer (13) incorporating a dryer vessel (1) equipped with a material inlet nozzle (10), a material outlet nozzle (11) and a gas discharge nozzle (2). The apparatus comprises a column (4) communicating with the gas discharge nozzle (2) of the dryer vessel (1) for feeding discharge gas (14) exiting via the gas discharge nozzle (2) of the dryer vessel (1) to the column (4) in order to concentrate in the column (4) the discharge gas (14) or the portion of the discharge gas (14) at least partially condensed. To the gas discharge nozzle (2) is connected a boiler (3) for transferring the thermal energy of the discharge gas (14) flowing through the gas discharge nozzle (2) at least partially to the column (4).
摘要:
The invention relates to a method and an apparatus for dewatering mixture of ethanol and water. The method comprises steps for feeding mixture of ethanol and water (1) into an evaporator (2), evaporating said mixture of ethanol and water (1) and feeding a stream of vaporized mixture of ethanol and water (3) to a vapor recompression unit (4), pressurizing vaporized mixture of ethanol and water (3) in the vapor recompression unit (4) and feeding a stream of pressurized vaporized mixture of ethanol and water (5) to a membrane unit (6), and dividing said stream of pressurized mixture of ethanol and water (5) in to a stream of mixture of ethanol and water (8) and into a stream of dewatered mixture of ethanol and water (7).