Secondary liquefaction equipment and liquefaction process for producing alcohol from starch-bearing raw materials

Abstract

The invention provides secondary liquefaction equipment and a liquefaction process for producing alcohol from starch-bearing raw materials. According to the secondary liquefaction equipment and the liquefaction process for producing alcohol from starch-bearing raw materials disclosed by the invention, waste heat recycling equipment is increased to collect secondary steam in the distillation section after fermentation of the starch-bearing raw materials to produce alcohol, and to transport the secondary steam to a vapor heat exchanger for heat exchange of the starch-bearing raw materials, thereby realizing the recycling of waste heat from production, so as to achieve the purposes of saving energy and reducing emission, reducing the production cost of alcohol and improving the competitiveness of enterprises; at the same time, amylase is added before secondary liquefaction of the starch-bearing raw materials to filter the starch-bearing raw materials, improve the liquefaction quality of the starch-bearing raw materials and hydrolyze the long-chain starch structure into the short-chain glucose structure, in order to facilitate the improvement of the yield of alcohol by fermentation atthe later stage.

Description

technical field [0001] The invention belongs to the technical field of equipment for producing alcohol from starchy raw materials, and specifically relates to secondary liquefaction equipment and a liquefaction process for producing alcohol from starchy raw materials. Background technique [0002] In the prior art, when starchy raw materials such as wheat flour and corn flour are used to produce alcohol, the process generally includes raw material crushing-liquefaction-saccharification-fermentation-distillation-segregation and other process steps. After the primary crushing of raw materials, In the liquefaction process, it is necessary to mix wheat flour or corn flour with liquefying enzyme first, then feed it to liquefy mash at a temperature of 80-90°C, and then saccharify the mash to ferment and distill, and the multi-link high-temperature steam directly Cooling, resulting in a large amount of heat loss and energy waste. At the same time, in actual industrial production, ...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, when starchy raw materials such as wheat flour and corn flour are used to produce alcohol, the process generally includes raw material crushing-liquefaction-saccharification-fermentation-distillation-segregation and other process steps. After the primary crushing of raw materials, In the liquefaction process, it is necessary to mix wheat flour or corn flour with liquefying enzyme first, then feed it to liquefy mash at a temperature of 80-90°C, and then saccharify the mash to ferment and distill, and the multi-link high-temperature steam directly Cooling, causing a lot of heat loss and energy waste

At the same time, in actual industrial production, the liquefaction of starchy raw materials is not complete, resulting in a low alcohol fermentation yield. The liquefaction of starchy raw materials is related to many factors such as the degree of crushing of starchy raw materials, liquefaction temperature, and liquefaction enzymes.

Images