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Biomass and coal mixed fluidized-bed gasification method and device

A fluidized bed gasifier, biomass technology, applied in the direction of granular/powdered fuel gasification, joint combustion mitigation, etc., can solve the problems of tar treatment, increase the complexity of operation, etc., to achieve a wide range of large quantities, not easy to large Large-scale concentrated use, the effect of improving the quality of life

Active Publication Date: 2005-12-07
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 increases the complexity of the operation and also has the problem of tar treatment in the production process

Method used

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  • Biomass and coal mixed fluidized-bed gasification method and device
  • Biomass and coal mixed fluidized-bed gasification method and device
  • Biomass and coal mixed fluidized-bed gasification method and device

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Embodiment Construction

[0020] like figure 1 , figure 2 As 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. The upper part of the fluidized bed gasifier 1 is cylindrical, and the lower part is an inverted cone. The furnace body is a steel plate structure with refractory lining. The lower part of the furnace body is equipped with an air distribution plate 20, an air chamber 21, an air inlet 22, and a slag discharge valve 17. The gasifier 1 is equipped with two feed bins 5 and 6 with screw feeding mechanisms. , the coal bin 5 is located at the lower part of the furnace body inverted cone; the biomass material bin 6 is located at the upper part of the furnace body inverted cone, and the top of the bin is provided with an agitator 18 to prevent the biomass from bridging and clogging; the middle part of the furnace body is provided with 4 The secondary air nozzle 19 is evenly distributed aro...

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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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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/54
CPCY02E20/18
Inventor 王同章王立群周浩生
Owner JIANGSU UNIV
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