1, Introduction to the Process
This Process has the advantages of advanced-process, high-technology, energy-saving, and high-operable, and the main technology are: double-enzyme liquefied saccharifying technology, multiple-use of waste heat technology, batched (or continuous) Fermentation, five differential pressure energy-saving distillation technology, molecular sieve dehydration technology, DCS control system, and etc.. It represents the technical strengths and advantages of Feicheng JINTA Machinery Co., Ltd.
2,Crushing section
The clean raw material after impurities removal is milled to flour to increase the heating surface area, which is good for the swelling and pasting of starch granules, and which improves the efficiency of heat treatment, shortens the cooking time, and makes mixture easy for flowing and transportation.

3, Liquefied and Saccharifying Section
It takes double-enzyme and continuous liquefying and saccharifying to lower the cooking temperature; the heat of cooking mash is collected by the heat-exchanging of thin paste and cooking mash; and it saves steam(save 250kg/ton alcohol)and cooling water by using thin paste to cool saccharifying mash..
Brief introduction to technology flow :

The thin paste goes directly to pre-liquefying tank after mixing, and then goes to low-temperature tank after preheated in thin paste pre-heater, and then the paste (high temperature) goes to low-temperature tank. Add amylase into the tank.

The thin paste then goes to thin paste pre-heater and then goes to steam jet heater (heated to 105℃) after pre-heated by cooking mash. After 100-120 minutes in liquefying tank, the mash then goes to cooling system (cool to 60~65℃) , and then to saccharifying tank. Add some extent of saccharifying enzyme to saccharifying tank and control the PH value to 3.8-4.2. The mash then goes to fermentation tank after temperature to 33℃.

4,Fermentation Section

Continuous fermentation is taken in this section to reduce manual operation and material consumption increase fermentation capacity. The fermentation time is 50~60 hours, and the designed alcohol content in matured mash is 11%（V/V）.

The Saccharifying mash first goes to yeast activation tank and then yeast tank. After 6-8 hours when the number of yeast reaches 100 million, the mash goes into 1# fermenter , and after the fullness of 1# fermenter , the mash then goes to 2# fermenter through connecting pipe, and by this analogy, the mash goes to the last tank. Meanwhile, the yeast also finishes the process of Proliferation and fermentation, with the matured mash to be drained to distillation section at the bottom of the last fermenter. The light wine in CO2 air (from fermenter) will be collected in light wine collector.

5,Distillation section(Five column distillation
      Matured fermenting mash goes to mash column after pre-heated in mash pre-heater I and II. The wine steam from the top of mash column is extracted in dilute column after condensing. The light wine from dilute column bottom flows to rectification column. 96%Half-product alcohol extracted from upper part of rectification column flows to and purified in off methanol column. Finished-product alcohol is taken at the bottom of off methanol column. The impurities extracted from middle rectification column and light wine from fusel oil separator flow to impurity column,and then extract fusel oil. The purified alcohol flows to dilute column.

      The key of this process is the heating methods: Rectification column is heated directly by fresh steam through re-boiler; Rectification column is heated directly by fresh steam. Dilute column and off methanol column is heated by the wine steam from the top of rectification column through two re-boilers. Mash column is heated separately by wine steam from the top of dilute column and off methanol column through two re-boilers. Impurity column is heated by flashed steam. Feed one column and five columns work to achieve three-effect thermal coupling and energy-save. Less than 2.3 ton steam per ton excellent-grade alcohol.

      In electricity saving, the forced-circulating heating method is replaced by thermosiphon re-boiler circulating heating method, which could avoid the blocking of heat-exchanging pipeline. Electricity consumption is 20kw, and compared with the former 40~50kw, it saves 50% electricity, avoids the repair of circulating pumps and also extends the working life of re-boilers.

      The trend of material: The fermenting mash goes to the top of mash column after heated by two pre-heaters. The wine steam from the top of mash column goes to dilute column after condensing, and after diluted & purified in dilute column, the impurity column reaches to 12~18%. Light wine from column bottom flows to rectification column after pre-heated. And the 96% alcohol is extracted at the side of upper rectification column, then goes to off methanol column. Finished alcohol product is extracted at the bottom of off methanol column after impurities-removal.

      On Impurity treatment： Impurity alcohol from condensers of mash column, dilute column, off methanol column and etc. as well as light wine from fusel oil separator goes to impurity column. Industrial alcohol is extracted after impurity-removing in impurity alcohol condenser, and fusel oil is extracted in the middle lower part. Impurity alcohol extracted at side of upper impurity alcohol flows to dilute column to improve the receiving rate of excellent-grade alcohol.

      Besides process improvement, equipment structure is also improved to improve alcohol quality. Add impurity alcohol purifying system to mash column, and add copper packing sulfur-removing system to rectification column to ensure alcohol purity and tast