Technology and equipment for preparation of synthetic gas by two-stage high temperature biomass gasification

A biomass and synthesis gas technology, applied in the chemical industry, sustainable manufacturing/processing, granular/powdered fuel gasification, etc., can solve the problems of many impurities in the gas, high tar content, and low calorific value of the gas, and achieve Improve gasification intensity and production capacity, improve tar cracking, and improve thermal energy efficiency

Inactive Publication Date: 2011-10-26
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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Problems solved by technology

The development of the gasification process is the key to the efficient utilization of biomass. The gas produced by the existing biomass gasification devic

Method used

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  • Technology and equipment for preparation of synthetic gas by two-stage high temperature biomass gasification
  • Technology and equipment for preparation of synthetic gas by two-stage high temperature biomass gasification

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[0019] The present invention will be further described below in conjunction with the drawings.

[0020] The present invention provides a two-stage high-temperature biomass gasification process for preparing synthesis gas. The method includes the following steps:

[0021] The biomass raw materials such as rice husk, straw, wood chips, etc. are crushed into powder, and two storage bins I and II connected in series are used for feeding to realize continuous feeding while ensuring system sealing. A valve is arranged between the two sealed storage bins; the storage bin is connected with the air compressor 1 through a pipeline to provide balance gas. Then the raw materials are fed into the gasification furnace I through the screw feeder 2 for the primary gasification reaction, and the feed rate is controlled and adjusted by the rotation speed of the screw feeder 2;

[0022] The gasification reaction is carried out in two stages. The raw materials first enter the furnace through the feed p...

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Abstract

The invention relates to a technology and equipment for preparation of synthetic gas by two-stage high temperature biomass gasification. Gasification in the technology is carried out in two stages, namely, primary gasification and high temperature gasification; biomass combustion gas, unreacted solids, tar and the like obtained in the primary gasification are directly delivered into a high temperature vapourizing furnace at high temperature and steam and air are also delivered into the vapourizing furnace so as to carry out high temperature gasification, thereby enhancing thermal efficiency, conversion rate of carbon and cracking rate of tar. In the process of the preparation, heat energy is self supplied, and heat is recovered to improve thermal efficiency; a thermal value of prepared synthetic gas can reach 7 to 8 MJ/m<3>. Equipment for realizing the technology comprises a biomass feed unit, gasification reactors, a dust collector, a heat reclaim unit, a washing unit, an air compressor, etc. The technology and equipment provided in the invention can be used to convert biomass raw materials like agricultural waste into synthetic gas with a high thermal value and low content of tar and are applicable to heat supply by biomass combustion gas, power generation by combustion gas or synthesis of liquid fuels.

Description

technical field [0001] The invention relates to the technical field of biomass gasification, in particular to a process and equipment for preparing raw material gas that can be used for synthesizing liquid fuels by using biomass raw materials. Background technique [0002] Biomass is the first kind of energy used in the development of human society. It is clean and renewable. It is the only renewable energy that can be converted into solid fuel, gas fuel, liquid fuel and electricity. my country is a big energy consumer, the primary energy consumption is second only to the United States, and it is the second largest energy consumer in the world. Facing the depletion of fossil resources, CO 2 In the severe situation of increasing emissions, the development of renewable energy and the adjustment of energy structure are important guarantees for the realization of my country's sustainable development strategy. my country is rich in biomass resources. According to statistics, the...

Claims

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Application Information

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IPC IPC(8): C10J3/46C10J3/48C10J3/84C10J3/72
CPCY02P20/10Y02P20/145
Inventor 应浩涂军令蒋剑春李琳娜孙云娟许玉
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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