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Coupling process for producing ethyl alcohol with fibre and generating power with biomass combustion

A technology of burning power generation and biomass, applied in the direction of biofuel, biosynthesis, microbial-based methods, etc., to solve processing problems, improve utilization efficiency, and reduce production costs

Active Publication Date: 2009-04-08
STATE GRID ENERGY CONSERVATION SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no process research on coupling biomass combustion power generation and fuel ethanol production at home and abroad. This invention proposes a coupling process to realize comprehensive utilization of biomass and improve utilization efficiency

Method used

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  • Coupling process for producing ethyl alcohol with fibre and generating power with biomass combustion

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Wheat straw is used as raw material for biomass combustion for power generation and fiber production for ethanol fermentation, in which the mass percentages of cellulose, hemicellulose and lignin are 34.8%, 35% and 18.5% respectively (reference for measurement methods: edited by Qu Weijun. Pulp and Papermaking Experiment. Beijing: China Light Industry Press, 1990). The direct combustion test was carried out in a small biomass boiler made by North China Electric Power University. The screw feed was used, the feed rate was 1t / h, and the power was 30kW. The single-stage backpressure power generation steam turbine STF426 (Zibo Sante Power Equipment Co., Ltd.) was used to generate electricity. The test was carried out for 2 hours, 3000kJ of electric power was obtained, 10MPa of waste heat steam was recovered, the steam volume was 1.5kg / h, and the power generation efficiency was 28%.

[0025] In the process of producing ethanol from fibers, wheat straw was crushed with a micr...

Embodiment 2

[0028] Wheat straw is used as raw material for biomass combustion for power generation and ethanol fermentation for fiber production, in which the mass percentages of cellulose, hemicellulose and lignin are 34.8%, 35% and 18.5%, respectively. The direct combustion test was carried out in a small biomass boiler made by North China Electric Power University. The pneumatic conveying device was used to feed the material. The feed rate was 3t / h and the power was 30kW. Power generation, the test was carried out for 2 hours, the obtained power was 17556kJ, the recovered waste heat steam pressure was 10MPa, the steam volume was 14kg / h, and the power generation efficiency was 35%.

[0029]In the process of producing ethanol from fibers, the wheat straw was pulverized with a micro-plant sample pulverizer FZ102, and passed through a 60-mesh sieve. Pass steam into the lignocellulose pretreatment device, temperature control is 100 ℃, add sulfuric acid (mass fraction is 4%), after processin...

Embodiment 3

[0032] Corn stalks are used as raw materials for biomass combustion power generation and ethanol fermentation for fiber production, and corn stalks and coal are co-combusted for biomass combustion power generation. The mass percent contents of cellulose, hemicellulose and lignin in corn stover were 39%, 19.5% and 15.1%, respectively. The combustion test was carried out in a small biomass direct-fired boiler made by North China Electric Power University. The pneumatic conveying device was used to feed the material. The mass ratio of corn stalks to coal was 1:1, the feed rate was 3t / h, and the power was 30kW under single-stage back pressure. The power generation steam turbine STF426 (Zibo Sangte Power Equipment Co., Ltd.) is used for power generation. The test was carried out for 2 hours, and the power obtained was 27556kJ. The steam pressure of recovered waste heat was 10MPa, the steam volume was 18kg / h, and the power generation efficiency was 32%.

[0033] Corn stalks in fiber...

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Abstract

The invention discloses a coupling technology of cellulosic ethanol production and biomass combustion power generation, which belongs to the renewable energy technology field. The coupling technology takes lignocellulose as raw material for carrying out the cellulosic ethanol production and the biomass direct combustion or the mixed combustion power generation, the lignocellulose raw material separately passes through a lignocellulose feeding device to enter a biomass combustion power generation device for realizing the direct combustion power generation; or the lignocellulose raw material is mixed with coal for combustion, thus realizing the mixed combustion power generation and further realizing the combustion power generation of the lignocellulose; hot steam which is generated by the power generation technology is recovered through a waste heat recovery device and used for heating of the cellulosic ethanol production technology; the generated power enters a national power grid through a transformer or is supplied to the cellulosic ethanol production. Therefore, the coupling technology realizes the cellulosic ethanol production and the biomass combustion power generation. The biomass power generation efficiency achieves 28-32 percent and can provide the power.

Description

technical field [0001] The invention belongs to the technical field of renewable energy, and in particular relates to a coupling process of ethanol production from fiber and biomass combustion power generation using lignocellulose as raw material for biomass direct combustion or co-combustion power generation. Background technique [0002] Biomass energy is second only to coal, oil and natural gas and ranks fourth in the world's total energy consumption, and occupies an important position in the entire energy system. In recent years, the energy supply has been tense. In order to ensure the sustainable supply of energy and electricity, China has attached great importance to the development of renewable energy. The "Renewable Energy Law" promulgated and implemented in 2006 provides legal protection for the development of renewable energy. "National Medium and Long-Term Science and Technology Development Program (2006-2020)" clearly puts "low-cost and large-scale development a...

Claims

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Application Information

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IPC IPC(8): C12P19/14C12P7/10F01K11/02F01K17/00F01D15/10C12R1/865C12R1/38
CPCY02E50/16Y02E50/10Y02P20/129Y02P20/59
Inventor 郑宗明董长青杨勇平
Owner STATE GRID ENERGY CONSERVATION SERVICE
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