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Low-emission biomass gasification poly-generation reburning device and technology

A biomass gas and biomass technology, applied in the field of biomass, can solve the problems of low gas outlet temperature, high moisture content of biomass, and high tar content, and achieve the effects of stable combustion, reduction of S element content, and reduction of NOx emissions.

Inactive Publication Date: 2016-10-26
HEFEI DEBO BIOENERGY SCI & TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a low-emission biomass gasification polygeneration reburning device and process. By adopting the combination of updraft gasifier and gas preheating, the biomass raw material is placed in the biomass updraft Pyrolysis and gasification reactions occur in the gasification cogeneration device to generate biomass gas, which solves the problem of low gas outlet temperature, high tar content in gas, and high biomass moisture in the existing biomass gasification process. low level problem

Method used

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  • Low-emission biomass gasification poly-generation reburning device and technology

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Experimental program
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Effect test

Embodiment 1

[0050] The raw material is 5cm bamboo chips with a water content of 35%. The circulating fluidized bed gas heating furnace 2 is filled with wear-resistant bed material, and the biomass gasification gasification cogeneration device 1 is gasified to produce biomass gas. The temperature of the gas is about 60°C. Value 680kcal / Nm 3 The biomass gas is pressurized by the gas booster fan 4 and sent into the circulating fluidized bed gas heating furnace 2 equipped with wear-resistant bed material. The circulating fluidized bed gas heating furnace 2 organizes the mixing and combustion of biomass gas and air to heat the gas to 750°C. The high-temperature gas is sent into the boiler 3, and is combusted with the preheated high-temperature air in the boiler combustion furnace 301. The high-temperature flue gas generated by combustion passes through the heating surface 302, the air preheater 303, and the economizer 304 to recover heat and then discharge it. The NOx content in the exhaust g...

Embodiment 2

[0052] The raw material is biomass pellets with a water content of 15%. The circulating fluidized bed gas heating furnace 2 is fed with wear-resistant bed materials, and the biomass updraft gasification cogeneration device 1 is gasified to produce biomass gas and biochar. The temperature of the gas is about 250℃, calorific value 1200kcal / Nm 3 The biomass gas is pressurized by the gas booster fan 4 and sent into the circulating fluidized bed gas heating furnace 2 equipped with wear-resistant bed material. The circulating fluidized bed gas heating furnace 2 organizes the mixing and combustion of biomass gas and air to heat the gas to 900°C. The high-temperature gas is sent into the boiler 3, and is combusted with the preheated high-temperature air in the boiler combustion furnace 301. The high-temperature flue gas generated by combustion passes through the heating surface 302, the air preheater 303, and the economizer 304 to recover heat and then discharge it. The NOx content i...

Embodiment 3

[0054] The raw material is straw with a water content of 30%. The circulating fluidized bed gas heating furnace 2 is added with wear-resistant bed materials, and the biomass updraft gasification cogeneration device 1 is gasified to produce biomass gas and biochar. The temperature of the gas is about 140°C. Calorific value 450kcal / Nm 3 The biomass gas is pressurized by the gas booster fan 4 and sent into the circulating fluidized bed gas heating furnace 2 equipped with wear-resistant bed material. The circulating fluidized bed gas heating furnace 2 organizes the mixing and combustion of biomass gas and air, and heats the gas to 500°C. The high-temperature gas is sent into the boiler 3, and is combusted with the preheated high-temperature air in the boiler combustion furnace 301. The high-temperature flue gas generated by combustion passes through the heating surface 302, the air preheater 303, and the economizer 304 to recover heat and then discharge it. The NOx content in the...

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Abstract

The invention discloses a low-emission biomass gasification poly-generation reburning device and technology. The low-emission biomass gasification poly-generation reburning device comprises a biomass updraught type gasification cogeneration device, wherein the gas outlet of the biomass updraught type gasification cogeneration device is connected with a gas pressure boost fan inlet; a gas pressure boost fan outlet is connected with a circulating fluidized bed gas heating furnace; the circulating fluidized bed gas heating furnace comprises a gas-solid separator and a return feeder; the circulating fluidized bed gas heating furnace is also connected with an air blaster; the outlet of the gas-solid separator is connected with a boiler; the tail of the boiler is connected with an induced draft fan; the outlet of the induced draft fan is connected with a chimney. Biomass gas is preheated by the circulating fluidized bed gas heating furnace, the biomass gas is firstly preheated to be above a fire point, and then, air distribution burnout is carried out. Compared with a traditional burner, the low-emission biomass gasification poly-generation reburning device is characterized in that the temperature and calorific value requirements of the biomass gas are lowered, the type and the moisture content of the biomass which can be used for gasification are enlarged, and an environment protection effect is good.

Description

technical field [0001] The invention belongs to the technical field of biomass, in particular to a low-emission biomass gasification polygeneration reburning device and process. Background technique [0002] Biomass energy resources are relatively abundant on the earth. The earth produces 173 billion tons of matter through photosynthesis every year, and the energy contained in it is equivalent to 10-20 times the total energy consumption in the world. However, due to the development value of biomass in traditional utilization methods Low, resulting in a current utilization rate of less than 3%. [0003] Biomass gasification polygeneration technology is the most promising technology to maximize the value of biomass. It is mainly divided into two types of furnaces: fixed bed and fluidized bed. Among them, they are widely used due to their high conversion efficiency. The biomass gas and raw materials in the up-suction fixed-bed polygeneration device move countercurrently in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/20C10J3/72C10J3/84C10J3/86
CPCC10J3/20C10J3/72C10J3/84C10J3/86C10J2300/0916C10J2300/1606
Inventor 张守军范晓旭鲁万宝赵成武张守峰冯干李益瑞吴银龙胡鹏
Owner HEFEI DEBO BIOENERGY SCI & TECH
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