Method and device for preparing hydrogen-enriched fuel gas through sawdust charcoal gasification by high-temperature water vapor

A technology of high-temperature water vapor and water vapor, applied in the field of biomass gasification, to achieve the effect of saving hydrogen production costs and simplifying the process flow

Inactive Publication Date: 2017-03-29
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Technical problem to be solved: the purpose of this invention is to provide a method and device for producing hydrogen-rich gas by high-temperature steam gasification of sawdust charcoal, which can effectively solve th

Method used

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  • Method and device for preparing hydrogen-enriched fuel gas through sawdust charcoal gasification by high-temperature water vapor
  • Method and device for preparing hydrogen-enriched fuel gas through sawdust charcoal gasification by high-temperature water vapor
  • Method and device for preparing hydrogen-enriched fuel gas through sawdust charcoal gasification by high-temperature water vapor

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Example 1: Using sawdust charcoal less than 0.56 mm in size as the raw material, check the system connection before starting the experiment, and check the air tightness of the system by purging with nitrogen. At the beginning of the experiment, first set a heating rate of 10°C / min to raise the temperature of the gasifier to 850°C, turn on the steam generator, and output the required flow rate of reaction steam stably. After the system is stable, the screw feeding device will be turned on to transport the sawdust charcoal to the gasifier. The gasification reaction will be stable and the steam generator will be turned off, and the waste heat recovery device will provide the water vapor required for the reaction.

[0024] The main reactions that take place in the gasifier furnace are as follows:

[0025] C+H 2 O→CO+H 2

[0026] CO+H 2 O→CO 2 +H 2

[0027] C+CO 2 →2CO

[0028] The three reactions are all endothermic reactions, and the H 2 output.

[0029] After t...

Embodiment 2

[0030] Example 2: The gasification reaction temperature is 900° C., the implementation process is the same as in Example 1, and the experimental results are shown in Table 1.

[0031] Table 1 Water vapor gasification results of sawdust charcoal at 850°C and 900°C

[0032]

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Abstract

The invention discloses a method and a device for preparing hydrogen-enriched fuel gas through sawdust charcoal gasification by high-temperature water vapor. Sawdust charcoal is used as a raw material, and water vapor is used as a gasification medium, so as to prepare the hydrogen-enriched fuel gas. The method mainly comprises the following steps: helical feeding of sawdust charcoal, generation of water vapor, gasification of sawdust charcoal and cooling of hydrogen-enriched fuel gas. The water vapor is supplied by a water vapor generator in the early stage; after the system is stabilized, the water vapor is supplied by a waste heat recycling device; the temperature of a reactor is 800 to 950 DEG C; and the hydrogen-enriched fuel gas is prepared under technological conditions of proper reaction temperature, flow of the water vapor, particle size of the raw material, reaction time and the like. According to the method, the hydrogen-enriched fuel gas with the hydrogen volume percentage of 61.2 to 65.8 percent and the maximum hydrogen yield of 113.5 mmol/g can be prepared. The method has the advantages that the hydrogen volume percentage of the fuel gas is high, no tar is generated, and the gasification device is simple in structure; and the hydrogen-enriched fuel gas can be applied to preparation of high-purity hydrogen, synthesized natural gas, liquid fuel including methyl alcohol and dimethyl ether, and the like.

Description

technical field [0001] The invention relates to biomass gasification technology, in particular to a method and device for producing hydrogen-rich gas by high-temperature steam gasification of sawdust charcoal. Background technique [0002] With the gradual depletion of fossil energy and the increasingly serious environmental problems caused by greenhouse gases, there is an urgent need to find new clean energy to replace the use of existing fossil fuels. Among many new energy sources, hydrogen energy is one of the most effective forms as a clean and efficient energy source. At present, 96% of hydrogen comes from fossil fuels, of which steam reforming of methane accounts for 48%, 30% comes from heavy oil and naphtha, coal gasification accounts for 18%, and 4% comes from electrolysis of water. The main disadvantage of hydrogen production from fossil fuels is that nitrogen, sulfur and greenhouse gases will be produced, which will pollute the environment, and the process will co...

Claims

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Application Information

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IPC IPC(8): C10J3/00C10J3/72C10J3/84C10J3/80
CPCC10J3/00C10J3/72C10J3/80C10J3/84C10J2300/094C10J2300/0976Y02P20/10Y02P20/129
Inventor 应浩贾爽蒋剑春孙云娟许玉徐卫孙宁
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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