Clean synthesis gas and preparation method thereof

A synthesis gas and clean technology, applied in the direction of granular/powdered fuel gasification, etc., can solve the problems of secondary pollution, high volatile content of biomass, low energy density, etc., improve utilization rate, and contribute to CO2 reduction row, achieve large-scale effects

Active Publication Date: 2011-02-02
EAST CHINA UNIV OF SCI & TECH
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  • Description
  • Claims
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the high tar content in the synthesis gas generated by gasification due to the high volatile content of biomass and low energy density in the existing biomass gasification method, which may easily cause secondary decoking. pollution and other defects, a new clean syngas and its preparation method are provided

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  • Clean synthesis gas and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] use figure 1 process. Biomass was pine wood waste from wood processing plants.

[0032] Clean synthesis gas is prepared by:

[0033] 1. Grind the waste pine wood to 2-3 mm in the pulverizer 1, and dry it with nitrogen gas at 150° C. until the water content is 10.0 wt % to obtain dried pine wood chips; grind the coal through the ball mill 2 to an average particle size of 0.1 mm , while drying by 150°C heat-carrying nitrogen to a moisture content of 10.0wt%, to obtain dry coal powder;

[0034] 2. Under the carrying effect of nitrogen, the dried pine wood chips and the dried coal powder are respectively passed through the pipeline 3 and the pipeline 4 to the pipeline 5 to complete uniform mixing to obtain mixed granules, wherein the dried pine wood chips account for 40% of the mass of the mixed granules;

[0035] 3. The gas-solid separation of the mixed particles is realized in the bag filter 6, and the separated nitrogen gas is discharged from the system, and the mixed...

Embodiment 2

[0039] Adopt the same flow process as embodiment 1. The biomass is straw.

[0040] Clean synthesis gas is prepared by:

[0041] 1. The rice straw is pulverized to about 3 mm in the pulverizer 1, and simultaneously dried by 250° C. heat-carrying nitrogen until the water content is 0.0 wt % to obtain dried rice straw particles; Drying at 250°C with heat-carrying nitrogen until the water content is 0.0wt%, to obtain dried coal powder;

[0042] 2. The dried straw granules and the dried pulverized coal are respectively passed through the pipeline 3 and the pipeline 4 to the pipeline 5 under the carrying action of nitrogen to complete the uniform mixing to obtain the mixed granules, wherein the content of the straw granules is 5% of the mixed granule mass;

[0043] 3. The gas-solid separation of the mixed particles is realized in the bag filter 6, and the separated nitrogen gas is discharged from the system, and the mixed particles enter the material tank 8 through the pipeline 7;...

Embodiment 3

[0047] Adopt the same flow process as embodiment 1. Biomass was a mixture of straw and pine wood (1:1 by weight).

[0048] Clean synthesis gas is prepared by:

[0049] 1. Grinding the biomass to 1-2mm in the pulverizer 1, and simultaneously drying it with nitrogen gas at 220°C until the water content is 4.0wt%, to obtain dry biomass particles; grinding the coal through the ball mill 2 to an average particle size of 58 μm , while drying by 220°C heat-carrying nitrogen to a moisture content of 4.0wt%, to obtain dry coal powder;

[0050] 2. The dried biomass granules and the dried coal powder are carried by nitrogen gas respectively through the pipeline 3 and the pipeline 4 to the pipeline 5 to complete the uniform mixing to obtain the mixed granules, wherein the mass of the biomass granules accounts for 0.1% of the mass of the mixed granules. %;

[0051] 3. The gas-solid separation of the mixed particles is realized in the bag filter 6, and the separated nitrogen gas is disch...

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Abstract

The invention relates to a preparation method of clean synthesis gas. The method comprises the following steps of: mixing dried biomass particles and dried coal powder uniformly to obtain the mixed particles; and feeding the mixed particles into an entrained flow gasifier by dense phase pneumatic transmission mode, and performing co-gasification on the mixed particles and a gasification agent to generate the clean synthesis gas. The invention also relates to the clean synthesis gas prepared by the method. In the preparation method of the clean synthesis gas, the co-gasification temperature of the entrained flow gasifier is high, the obtained synthesis gas dose not contain harmful ingredients, such as tar, phenol and the like, so the problem that the volatile content of the biomass is high and energy density is low, so secondary pollution is caused by decoking due to high the tar content of the synthesis gas which is gasified independently is solved; meanwhile, the use ratio of the biomass is increased, CO2 emission reduction is facilitated, large-scale, high-efficiency, clean and economic use of the biomass can be realized.

Description

technical field [0001] The invention relates to a clean synthesis gas and a preparation method thereof. Background technique [0002] Among various renewable energy sources, biomass energy is the only carbon resource that can be converted into gaseous, liquid and solid fuels and other chemical raw materials or products that can replace fossil energy. Biomass energy conversion and utilization technologies mainly include thermochemical conversion technology and biochemical conversion technology, and biomass gasification in thermochemical conversion technology is one of the fastest-growing and most practical technologies for high-grade utilization of biomass energy, and it is also the first to realize One of the commercially applied biomass energy conversion technologies. [0003] However, there are some disadvantages in separate biomass gasification: ① The seasonality of biomass and the dispersion of its distribution limit the continuity and scale of biomass gasification; ② D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/46
Inventor 陈雪莉龚欣郭晓镭代正华梁钦锋于广锁周志杰王亦飞李伟锋许建良郭庆华王兴军刘霞王辅臣刘海峰
Owner EAST CHINA UNIV OF SCI & TECH
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