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Method for removing biomass gasification pollutants by magnetically stabilized bed

A technology for magnetically stabilizing a bed and pollutants, which is applied in the field of biomass gasification pollutant treatment, can solve the problems of complex process, increase cost, etc., achieve high catalytic efficiency, improve service life, and inhibit the generation of bubbles.

Inactive Publication Date: 2019-03-22
HUNAN JUNXIN ENVIRONMENTAL PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, both of these two processes require a large amount of dust removal equipment at the end, which not only increases the cost, but also complicates the process

Method used

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  • Method for removing biomass gasification pollutants by magnetically stabilized bed
  • Method for removing biomass gasification pollutants by magnetically stabilized bed
  • Method for removing biomass gasification pollutants by magnetically stabilized bed

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Embodiment 1

[0027] A method for removing biomass gasification pollutants by a magnetically stabilized bed of the present invention, comprising the steps of:

[0028] (1) Preparation of magnetic catalyst Co / γ-Al by impregnation method 2 o 3

[0029] Take 18g Co(NO 3 ) 2 •9H 2 O was adjusted to 20 mL with deionized water, and 3 mol / L Co(NO 3 ) 2 solution. Add about 20g of 0.63mm γ-Al 2 o 3 Immerse into it and let stand for 12h. Afterwards, the catalyst and the solution were separated into solid and liquid, and the solid was dried in an oven at 105 °C for 12 h. Finally, the dried catalyst was put into a muffle furnace from room temperature to 500°C at a rate of 10°C / min, and calcined at this temperature for 4 hours to obtain Co / γ-Al with a Co content of 15%wt. 2 o 3 Catalyst precursor, followed by hydrogen reduction to obtain Co / γ-Al 2 o 3 catalyst.

[0030] In the present invention, the particle size of the catalyst is controlled to be 0.6-0.65 mm, and studies have proved tha...

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Abstract

The invention discloses a method for removing biomass gasification pollutants by a magnetically stabilized bed. The method comprises the following steps: charging Co / gamma-Al2O3 into a reactor bed body of a magnetically stabilized bed reactor; then, heating the magnetically stabilized bed up to 600-750 DEG C and performing heat preservation; feeding a mixed gas of gasification gas with fly ash andtar and water vapor into the magnetically stabilized bed reactor; and removing pollutants in the gasification gas under a magnetic field strength of 250-1000 Oe. The method provided by the inventionefficiently removes the fly ash and biomass tar in the biomass gasification gas by using Co / gamma-Al2O3 as a catalyst and controlling specific temperature, magnetic field strength, gas velocity and other parameters, and has advantages of simple operation, stable operating, less damage to magnetic catalyst, high recovery rate and low operating costs.

Description

technical field [0001] The invention relates to the technical field of biomass gasification pollutant treatment, in particular to a method for removing biomass gasification pollutants by a magnetically stable bed. Background technique [0002] In the biomass gasification process, in addition to the main product gasification gas, by-products such as biomass tar and fly ash are also generated, and tar removal and dust removal equipment are required at the end. Common tar catalytic cracking devices such as fixed bed and fluidized bed have certain limitations. For example, the bed of the fluidized bed is disturbed violently, the catalyst is easily broken and thus mechanically deactivated, and there are bubbles in the bed of the fluidized bed, causing Gas short circuit, insufficient contact between fluid and catalyst, bed material entrainment phenomenon in fluidized bed, resulting in catalyst loss; fixed bed bed material particle size is large, unable to exert catalyst size effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/02B01J8/24B01J23/75B01J37/02B01J37/18
CPCB01J8/02B01J8/24B01J23/75B01J37/0201B01J37/18B01J35/33
Inventor 毛正江
Owner HUNAN JUNXIN ENVIRONMENTAL PROTECTION CO LTD
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