Multi-product alcohol production equipment using sweet sorghum as raw material

Abstract

This invention provides a multi-product alcohol production equipment using sweet sorghum as raw material. It includes a stalk saccharification and concentration device, a two-stage bio-fermentation device, a continuous solid-state distillation device, and a biomass energy recovery device. The equipment performs saccharification through a multi-enzyme catalytic hydrolysis reactor, utilizes two-stage fermentation to simultaneously produce alcohol and industrial enzymes, and employs a continuous distillation system to improve separation efficiency. The entire system integrates waste heat recovery and biogas power generation to achieve energy recycling. Compared with traditional equipment, this invention can increase alcohol yield by 15-20% and reduce overall energy consumption by 30%, achieving the process goals of high efficiency, low energy consumption, and environmental friendliness.

Claims

1. A multi-product alcohol production device using sweet sorghum as raw material, comprising: a stalk saccharification and concentration device, including: A raw material pretreatment system includes washing, crushing, and juice extraction equipment; a multi-enzyme catalytic hydrolysis reactor installed on one side of the raw material pretreatment system for adding α-amylase, glucosylase, and isomerase to carry out multiple enzymatic saccharification reactions; a membrane separation and purification device installed on one side of the raw material pretreatment system, which uses ultrafiltration and reverse osmosis to remove non-sugar impurities and improve the purity of the sugar solution; a multi-effect evaporator connected to the membrane separation and purification device to concentrate the sugar solution to a fructose content of 55%; and a crystallization and drying device connected to the multi-effect evaporator to produce solid fructose-glucose product from the sugar solution; A two-stage bio-fermentation device, installed in the stalk saccharification and concentration equipment, includes: a primary fermentation tank containing a yeast strain specifically for the conversion of sugars into ethanol; a secondary fermentation tank connected to the primary fermentation tank for inoculating a recombinant engineered strain, simultaneously producing industrial enzymes such as cellulase and xylanase; a fermentation parameter control system electrically connected to the primary and secondary fermentation tanks, including mechanisms for adjusting temperature, pH, dissolved oxygen, and stirring speed; and a strain addition and transfer device installed between the primary and secondary fermentation tanks to ensure the two-stage fermentation process. The process proceeds sequentially; a continuous solid-state distillation unit, installed on one side of the two-stage bio-fermentation device, includes: a preheating feed mechanism equipped with a raw material conveyor belt connected to a steam preheating chamber; a multi-tower continuous distillation system connected to the preheating feed mechanism, comprising a crude distillation column, a rectification column, and a reflux condenser; an automated control distillation device electrically connected to the preheating feed mechanism and the multi-tower continuous distillation system, equipped with monitoring devices for parameters such as temperature, pressure, and flow rate; a comprehensive thermal energy utilization system connected to the multi-tower continuous distillation system, equipped with a waste heat recovery unit and a heat exchange network; and a product separation and collection device. Located on one side of the multi-tower continuous distillation system, it includes an alcohol storage tank and residue output equipment; a biomass energy recovery device, installed on the continuous solid-state distillation equipment, includes a high-temperature anaerobic digestion reactor, located on the product separation and collection device, which can treat organic waste residue from alcohol production; a biogas purification and separation device, connected to the high-temperature anaerobic digestion reactor, used to remove impurity gases such as CO2 and H2S; a biogas internal combustion generator set, installed after the biogas purification and separation device, converts biogas into electrical energy; and a waste heat capture and reuse system, installed on the biogas internal combustion generator set, to recover waste heat from the generator set and each reactor.

2. The sweet sorghum raw material multi-product alcohol production equipment as described in claim 1, wherein, The stalk saccharification and concentration equipment is equipped with a continuous enzyme immobilization reactor, which uses carrier immobilization technology to improve enzyme catalytic efficiency and reusability.

3. The sweet sorghum raw material multi-product alcohol production equipment as described in claim 1, wherein the biomass energy recovery device has an intelligent load distribution system that can automatically adjust the output ratio of electricity and heat according to production needs.

4. The sweet sorghum raw material multi-product alcohol production equipment as described in claim 1, wherein, The alcohol yield is increased by 15-20% compared to the single fermentation process, the value-added of by-product enzymes is over 50%, the distillation efficiency reaches 98.8%, the overall energy consumption is reduced by 30%, the sugar loss rate of sugar products is controlled within 5%, the system energy self-sufficiency rate reaches over 60%, and greenhouse gas emissions are reduced by 45%.

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