基于PLC的秸稈發(fā)酵制取燃料乙醇設(shè)備與控制技術(shù)的研究

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Research of Straw Fermentation of Fuel Ethanol Equipment
and Control Technology Based on PLC
Abstract: With the fossil resources is becoming more and more seriously depleted and polluted, more and more countries attach great importance to renewable biomass clean energy around the world. More and more countries put fuel ethanol and other alternative energy sources as one of the main direction of the energy strategy. Fuel ethanol is prepared by chemical synthesis and biological fermentation, the biological method mainly takes starch, molasses, or cellulose as raw material, and to produce ethanol by microbial metabolism. Use of the planet's most abundant renewable resources straw cellulose to produce bio-ethanol has been more nationally attended. Representative cellulose of Straw to produce fuel ethanol has broad prospects for development. It develops fast. But there is no large-scale production by now mainly because of higher production costs and low efficiency. Related production technology is not very mature, and related production equipment is imperfect. So the research to technology of straw cellulose fermentation fuel ethanol and equipment is necessary.
Based on the fermentation of straw cellulose was analyzed, using plant straw as the research object, the fermentation process, using the enzymatic hydrolysis andsimultaneous saccharification and fermentation, distillation, process of producingfuel ethanol purification. In this process, established the mathematical model of biomass concentration, using T-S fuzzy predictive control algorithm to optimize the control of cell concentration in fermentation process, completed based onKingview as upper machine and Siemens S7-200 PLC for the design of control system of fermentation process computer.

Keywords: Simultaneous saccharification and fermentation, T-S fuzzy predictive controller,
S7-200 PLC, Kingview
目 錄
第一章 緒 論 ...1
1.1 燃料乙醇的概述 ..............................................................................................................1
1.2 燃料乙醇在國內(nèi)外的發(fā)展概況 ........................................................................................1
1.3 本課題的主要研究內(nèi)容 ....................................................................................................3
1.4 本章小結(jié) ............................................................................................................................4
第二章 秸稈制取燃料乙醇的發(fā)酵工藝流程 5
2.1 秸稈發(fā)酵的主要發(fā)酵工藝 ................................................................................................5
2.1.1 預(yù)處理.......................................................................................................................5
2.1.2 水解...........................................................................................................................5
2.1.3 發(fā)酵...........................................................................................................................6
2.1.4 脫水...........................................................................................................................7
2.2 秸稈發(fā)酵的發(fā)酵工藝流程...............................................................................................7
2.3 主要環(huán)境因子對(duì)發(fā)酵過程的影響...................................................................................7
2.3.1 溫度對(duì)發(fā)酵過程的影響...........................................................................................8
2.3.2 pH值對(duì)發(fā)酵過程的影響..........................................................................................9
2.3.3 溶氧量對(duì)發(fā)酵過程的影響.............................