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Device and method for preparing hydrogen-rich gas by gasifying biomass

A biomass and hydrogen-rich technology, applied in the manufacture of combustible gas, petroleum industry, energy input, etc., can solve the problems of difficult conversion and removal, high tar content, complicated purification, etc. The effect of self-heating

Active Publication Date: 2014-07-16
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Technical problem: The purpose of the present invention is to provide a device and method for producing hydrogen-rich gas from biomass, so as to solve the problem that the existing biomass gasification products have many components, complex purification, high tar content, and difficult conversion and removal. To solve the problem, a biomass gasification device and its method for producing tar-free and easily purified hydrogen-rich gas by thermochemical conversion of biomass are proposed

Method used

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  • Device and method for preparing hydrogen-rich gas by gasifying biomass

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Embodiment 1

[0060] Agricultural waste corn stalks are used as raw materials, and the gasification process is as described above: corn stalks are crushed to about 1mm, moisture content 2 o 3 and K 2 CO 3 , the ratio of the two is 4:1, the component H of the vaporized hydrogen-rich gas is condensed 2 : 63.9%, CO: 8.3%, CO 2 : 27.7%, CH 43 / kg cornstalk.

Embodiment 2

[0062] Agricultural waste straw is used as raw material, and the gasification process is as above: wheat straw is crushed to about 1mm, moisture content is 2 o 3 and K 2 CO 3 , the ratio of the two is 4:1, and the component H of the vaporized hydrogen-rich gas is condensed 2 : 63.1%, CO: 5.8%, CO 2 : 30.9%, CH 4 3 / kg.

Embodiment 3

[0064] Agricultural waste straw is used as raw material, and the gasification process is as above: wheat straw is crushed to about 1mm, moisture content is 2 o 3 、K 2 CO 3 and CaO mixture, the ratio of the three is 3:1:1, the composition of the vaporized hydrogen-rich gas after condensation is H2: 80.6%, CO: 3.8%, CO 2 : 15.5%, CH 4 3 / kg straw.

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Abstract

The invention discloses device and method for preparing hydrogen-rich gas by gasifying biomass. The device mainly comprises a pyrolysis reactor, a combustion reactor, a gasification reactor, a gas-solid separator, a gas cooler and an exhaust heat boiler, wherein the pyrolysis reactor is arranged in the combustion reactor. In a process course, the biomass is firstly pyrolyzed in the pyrolysis reactor to generate pyrolysis gas and coke, the pyrolysis gas is directly combusted to provide heat for biomass pyrolysis and gasification, and the coke is subjected to gasification reaction with water vapor to obtain the hydrogen-rich gas. The device and method disclosed by the invention realize the separation of the pyrolysis process and coke gasification process of the biomass and can be used for displacing the hydrogen contained in the water vapor by sufficiently utilizing fixed carbon contained in the biomass. According to the device and method, the obtained hydrogen-rich gas mainly contains H2, CO2 and a small amount of CO, so that the conventionally gasified hydrogen-rich gas product is prevented from being mixed with low-carbon hydrocarbon gas and tar, and the subsequent decontamination and purification utilization are simple, convenient and economic.

Description

technical field [0001] The invention discloses a method for preparing a hydrogen-rich body from biomass and a device system thereof, and relates to the field of utilization of biomass resources. Background technique [0002] Hydrogen energy is a high-quality clean energy. The product in the energy conversion process is water, which can truly achieve zero discharge of pollutants. Since hydrogen energy is a secondary energy source, it must be obtained through primary energy conversion. At present, hydrogen is mainly produced through the thermochemical conversion of fossil fuels such as natural gas, coal, and petroleum. Although the technology is mature, the conversion process consumes a lot of energy, the conversion efficiency is low, and the cost is high, and the conversion process is accompanied by a large amount of CO 2 emission. With the shortage of fossil energy and the increasingly severe ecological environment, the use of renewable biomass to seek a clean, economical ...

Claims

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Application Information

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IPC IPC(8): C10J3/58C10J3/84C10J3/86
CPCY02P20/129
Inventor 肖军沈来宏黄瑛李海燕周亚运
Owner SOUTHEAST UNIV
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