Cracking purification method for combustible gas produced by gasifying crude material

A biomass and gas technology, which is applied in the direction of catalytic treatment of combustible gas, can solve the problems of easy carbon deposition and deactivation of catalysts, increased gas production costs, and incomplete purification, and achieves increased market application potential, obvious environmental protection benefits, and production strong effect

Inactive Publication Date: 2004-03-31
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The purpose of the present invention is to provide a novel biomass gasification method to overcome the disadvantages of incomplete purification or complex technology, the catalyst is prone to carbon deposition and deactivation and S poisoning, and the application of the catalyst greatly increases the production cost of gas. The generated combustible gas cracking and purification method combines high-temper

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  • Cracking purification method for combustible gas produced by gasifying crude material
  • Cracking purification method for combustible gas produced by gasifying crude material
  • Cracking purification method for combustible gas produced by gasifying crude material

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Embodiment Construction

[0031] This embodiment is a 3MW circulating fluidized bed biomass gasification power station, which uses the gas cracking and purification method and combined device of the present invention to crack the combustible gas containing tar and dust produced by the gasification of the circulating fluidized bed biomass gasification furnace Purification, clean combustible gas after purification is supplied to 6 500KW gas generator sets for power generation.

[0032] Example uses figure 2 The combustible gas pyrolysis and purification combination device produced by biomass gasification is shown, which includes moving bed cracker I, heat exchanger (air preheater (cooler) II), electrostatic precipitator III, Venturi tube IV and water washing spray tower V and VI; the gas outlet of the former device of the six independent devices is connected with the gas inlet of the latter device with pipelines to form a complete combined device.

[0033] The moving bed cracker I is a fixed bed gasifi...

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Abstract

A method of degrading and cleansing combustible gases produced during gasifying biological matters. It comprises) passing a cracking machine with a moving bed, the combustible gases will be cracked by high-temperature and catalysis in the charcoal bed at 800-1200degree C, most of tar is removed; b)reducing the temperature of combustible gases from 800degree C to 300-350degree C; c) dedusting by static electricity at a high-voltage electric field of 80000 volts, reducing the temperature to 250-300degree Cú”(d) washed by water, debusting and detarring, reducing the temperature to 60-80degree Cú”(E) washing, filtering and reducing the temperature to below 40degree C, the contents of tar and dust in the combustible gases will be reduced below 50mg/Nm3. The invention could remove completely dust and tar in combustible gases.

Description

technical field [0001] The invention relates to a method for pyrolysis and purification of combustible gas produced by biomass gasification. Background technique [0002] my country's biomass reserves are very rich, and the use of biomass as an alternative energy source can achieve C0 2 Zero emissions, while greatly reducing the greenhouse effect and acid rain pollution. Due to the high volatile content in biomass and the high activity of carbon, the current high-efficiency utilization of biomass at home and abroad mainly focuses on pyrolysis and gasification to produce combustible gas for gas supply and power generation. Circulating fluidized bed biomass gasification has strong raw material adaptability, uniform bed temperature, high production intensity, high gas calorific value, and high gasification efficiency. However, the main problem is that the fine particle ash is carried seriously, and the gasification process produces more tar, which makes it difficult to purify...

Claims

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Application Information

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IPC IPC(8): C10K3/02
Inventor 吴创之赵增立郑舜鹏
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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