Gasification method and device for biomass and coal mixed fluidized-bed

A fluidized bed gasifier, biomass technology, applied in the direction of granular/powdered fuel gasification, etc., can solve the problems of tar treatment, increase the complexity of operation, etc. Effect of gas composition stabilization

Active Publication Date: 2004-12-29
JIANGSU UNIV
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Problems solved by technology

The method of double biomass in the United States improves the calorific value of the gas, but incr...

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  • Gasification method and device for biomass and coal mixed fluidized-bed
  • Gasification method and device for biomass and coal mixed fluidized-bed
  • Gasification method and device for biomass and coal mixed fluidized-bed

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Embodiment Construction

[0020] like figure 1 , figure 2As shown, the device is divided into a fluidized bed gasifier (1), a flue gas purification system, a gas purification system, an air supply system, and a steam system, wherein the upper part of the fluidized bed gasifier (1) is cylindrical, and the lower part is Inverted cone shape, the furnace body is steel plate structure with refractory lining, the lower part of the furnace body is equipped with air distribution plate (20), air chamber (21), air inlet (22), slag discharge valve (17), gasifier (1) There are two feed bins (5, 6) with screw feeding mechanism, the coal bin (5) is set at the lower part of the furnace body inverted cone; the biomass material bin (6) is set at the upper part of the furnace body inverted cone, and the top of the feed bin A stirrer (18) is provided to prevent the bridging and clogging of biomass materials; 4 secondary air nozzles (19) are arranged in the middle of the furnace body, which are evenly distributed around...

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Abstract

The present invention relates to energy source apparatus, and is one kind of simple biomass-coal mixture gasifying method and apparatus capable of producing high heat value gas and no tar. Inside fluidized bed gasifying furnace, biomass and coal as gasified material is burnt and gasified intermittently. In the burning stage, coal and blast are supplied to the furnace, so that coal is burnt in fluidizing state to produce heat; in the gasifying stage, vapor and biomass are supplied to the furnace, so that the high temperature carbon material layer produces water gas reaction in fluidizing state and biomass is dry distilled and pyrolyzed at high temperature to produce high heat value gas, which is cooled and made to enter the gas purifying system. By combining of biomass and coal with different advantages, the present invention produces high heat value fuel gas without tar.

Description

Technical field [0001] The invention relates to energy equipment, in particular to a fluidized bed method and a gasification device for converting biomass and coal into high calorific value fuel gas. Background technique [0002] Biomass energy is a widely existing and widely used energy source. Compared with coal, biomass has low energy density, low ash content, and high volatile phenol content. What is important is that it produces more polymeric hydrocarbons, that is, tar The output is large. For example, the amount of tar produced by straw gasification can reach 20g / NM 3 . Therefore, the feeding mechanism, gas-solid flow and temperature field in the bed of the conventional gasifier need to be rearranged. For example, the domestic biomass fluidized bed gasification furnace puts sand material of a certain size into the furnace, heats it to 700 ℃ ~ 800 ℃ to form a stable bed, and then adds biomass into the furnace and mixes it with sand material In this state, air is in...

Claims

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Application Information

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IPC IPC(8): C10J3/54
Inventor 王同章王立群周浩生
Owner JIANGSU UNIV
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