Method and device for producing fuel alcohol by fermentation liquor distillation-free whole molecular sieve adsorptive separation

Abstract

The invention belongs to the technical field of chemical industry, in particular to a preparation method and device of fuel alcohol through distill-free fermentation and molecular sieve adsorption and separation. The method and steps are as follows: extracting directly of the mixture of ethyl alcohol and water above the fermentation fluid raw material (unclear wine fluid, ethyl alcohol comprising 1 to 15 percent) with a temperature of 20 to 40 degrees, and leading into the sparse water silicon zeolite absorbent bed level after heating to 100 to 120 degrees C. Then the ethyl alcohol is absorbed by sparse water absorbent, and the water is discharged. Afterward pressure reducing desorption or gas carrying desorption are adopted to enable the high-concentration alcohol desorption absorbed by the sparse water silicon zeolite absorbent to get highly concentrated ethyl alcohol vapor with a concentration of more than 95 percent, which can be fuel alcohol with a concentration of more than 99.2 percent after the dehydration through the 3A molecular sieve or dry dehydration by other drying agents. Compared with traditional multiple-effect rectification method, the method can save energy by above 50 percent. The preparation method and device of fuel alcohol through distill-free fermentation and molecular sieve adsorption and separation has the advantages of the realization of continuous production, simple equipment, small occupying area, high efficiency, low energy consumption, and extensive application prospect in the concentration production of the organic solvents of the biomass fermentation high volatile molecules.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a preparation method and device of fuel alcohol. Background technique [0002] As a non-renewable energy, petroleum has limited reserves all over the world. As the international crude oil price continues to soar, it poses a serious challenge to the sustained and healthy development of the national economy and national security. Opening up new renewable energy sources is a requirement of the country's sustainable development strategy, and it is also a top priority. [0003] Biological resources - plants (or animals) are sustainably generated and available for continuous consumption of energy. Some countries that are short of oil resources, such as Brazil, have already successfully developed the process of fermenting sugar leftovers from corn and sugar cane to produce alcohol for fuel. Currently, about 50% of the country's car power comes from fuel ethanol....

AI Technical Summary

Problems solved by technology

Because in this range, the amount of alcohol and water in the liquid phase and the vapor phase are relatively close (see Figure 1 (A)), the rectification efficiency is low

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