Energy-saving liquefaction system for production of alcohol from starchiness raw materials

Abstract

The invention belongs to the technical field of equipment for the production of alcohol from starchiness raw materials, and particularly relates to an energy-saving liquefaction system for the production of the alcohol from the starchiness raw materials. The energy-saving liquefaction system comprises a mixing spiral conveyer, a primary preheating device, a liquefying preheating system, a steam heating device, a liquefying conveyor pump, a liquefying system, a liquefying mash cooling system, a saccharifying tank, a saccharifying liquid cooling system, a saccharifying liquid cache tank, a saccharifying liquid high-temperature pump, a saccharifying liquid low-temperature pump, a heat exchanger and a tail gas condensation washing discharge device. According to the energy-saving liquefaction system, secondary steam generated in the flash evaporation and cooling process of liquified mash the evaporation and cooling process of saccharified liquid after liquefying the starch raw materials isrecovered, the starch raw materials are preheated by using the recovered secondary steam, temperature rising and pre-liquefying are conducted on the starch raw materials step by step, thus the recovery and reuse of the secondary steam are achieved, the purposes of reducing energy consumption, cooling water consumption, energy conservation and emission reduction are achieved, thus the production cost of alcohol is lowered, and the competitiveness of enterprises is improved.

Description

Technical field: [0001] The invention belongs to the technical field of equipment for producing alcohol from starchy raw materials, and in particular relates to an energy-saving liquefaction system for producing alcohol from starchy raw materials. Background technique: [0002] In the prior art, when corn, cassava, rice, wheat, sorghum and other starchy raw materials are used to produce ethanol, the process generally includes raw material crushing—liquefaction—saccharification—fermentation—distillation—segment separation And other process steps, after the raw material is crushed, it is necessary to mix and stir the starchy raw material with the liquefaction enzyme in the liquefaction process, and then heat up to 95~103°C for liquefaction after liquefaction by spraying, and then exchange it with cold water through a plate heat exchanger after liquefaction. Heat, the liquefied mash cools down to about 60°C and enters the saccharification tank for saccharification. After the co...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, when corn, cassava, rice, wheat, sorghum and other starchy raw materials are used to produce ethanol, the process generally includes raw material crushing—liquefaction—saccharification—fermentation—distillation—segment separation And other process steps, after the raw material is crushed, it is necessary to mix and stir the starchy raw material with the liquefaction enzyme in the liquefaction process, and then heat up to 95~103°C for liquefaction after liquefaction by spraying, and then exchange it with cold water through a plate heat exchanger after liquefaction. Heat, the liquefied mash cools down to about 60°C and enters the saccharification tank for saccharification. After the cold water is heated up, it is cooled by the glass fiber reinforced plastic cooling tower and then recycled. The saccharification liquid is then exchanged with cooling water through a plate heat exchanger to about 45°C and sent to the saccharification temporary storage tank. Storage, then cooled and then fermented. During the cooling process of the liquefied mash, the heated cold water will not only cause waste of heat consumption, but also cause consumption of cooling water during the cooling process of the liquefied mash. Heat consumption is wasteful. Therefore, when the existing starchy raw materials are used to produce alcohol, in the process of liquefaction and saccharification of starchy raw materials, energy consumption is large, a large amount of energy is wasted, and a large amount of cooling water is also consumed

Images