Gasification device and method for preparing hydrogen-rich synthetic gas from biomass

A gasification device and biomass technology, which is applied in the production of combustible gas, granular/powder fuel gasification, petroleum industry, etc., can solve the problems of sacrificing the calorific value of gasification gas, difficulty in enlarging fixed beds, and high cost. Achieve the effect of promoting steam gasification reaction, improving energy utilization rate, and promoting biomass gasification reaction

Active Publication Date: 2010-11-10
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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Problems solved by technology

[0006]The above three processes have obvious weaknesses respectively. The pyrolysis process needs to burn part of the combustible gas to make the reactor reach a high temperature of 1000°C, thus sacrificing the calorific value of the gasification gas ; The two-stage gasification process requires a large amount of heat source to be supplied to the pyrolysis chamber for pyrolysis, and the fixed bed has the disadvantage of being difficult to scale up; although the three-step process can obtain a gas with a high degree of cleanliness, the cost is too high and the economy is very low Difference

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  • Gasification device and method for preparing hydrogen-rich synthetic gas from biomass
  • Gasification device and method for preparing hydrogen-rich synthetic gas from biomass
  • Gasification device and method for preparing hydrogen-rich synthetic gas from biomass

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Embodiment 1

[0050] Example 1 A Process for Producing Low-Tar Hydrogen-rich Syngas by Sawdust Circulating Fluidized Bed Gasification

[0051] usefigure 1 The shown device takes the sawdust raw material of the wood processing plant, and the industrial analysis and elemental analysis of the sawdust are as shown in attached table 1. The sawdust and the adsorbent are mixed in a ratio of 95:5 and passed through the biomass feeder 1 through the biomass feed pipe 13 Send it to the mixer 2, and quickly mix and exchange heat with heat carrier and adsorbent at a temperature of 850 °C (the mass ratio of heat carrier and adsorbent is 7:3), and change the circulation rate by adjusting the opening of the disc valve 11, and the sawdust is After heating to about 600°C, the sawdust, heat carrier, and adsorbent are accelerated into the pyrolysis chamber 3 by gravity, and then decelerated to a stationary state by the blockage of the pyrolysis chamber baffle 16, experiencing a cycle of constant acceleration-de...

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Abstract

The invention provides a gasification device and a gasification method for preparing hydrogen-rich synthetic gas from biomass. The device comprises a biomass feeder, a mixer, a pyrolysis chamber, a gasification chamber, a gasified gas separator, a combustion chamber, a flue gas separator, a bin and a butterfly valve. In the method, the biomass gasifying process is divided into three parts, namelybiomass pyrolysis, semicoke gasification and heat carrier circulation. Through the method and the device, the synthetic gas with the tar content less than 200mg / Nm<3> and the H2 / CO ratio more than 1.1 can be obtained, and the energy utilization rate and the process economy are obviously improved.

Description

technical field [0001] The invention relates to the technical field of biomass gasification, in particular to a gasification device and method for producing hydrogen-rich synthesis gas from biomass. technical background [0002] The physical and chemical processes of biomass gasification mainly include biomass drying, pyrolysis, gasification, and gas phase reaction. The above pyrolysis and gasification processes can produce tar. When the pyrolysis reaction temperature is 400°C, the biomass devolatilizes to produce sugars, aldehydes, and acid compounds. Butene and cyclopentadiene are the main precursors of tar; as the reaction temperature rises, these precursors undergo devolatization H. Polymerization and other reactions to generate phenolic compounds; when the reaction temperature is further increased to 900°C, the tar is mainly composed of polycyclic aromatic hydrocarbons and alkyl-substituted polycyclic aromatic hydrocarbons. According to the characteristics of tar compo...

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Application Information

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IPC IPC(8): C10J3/66C10J3/84C10J3/54C10J3/56
Inventor 谢建军阴秀丽吴创之
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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