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System and method for recycling sensible heat of biomass gasification gas

A sensible heat recovery and biomass technology, applied in gasification process, manufacture of combustible gas, chemical industry, etc., can solve problems such as boiler efficiency decline, and achieve the effect of increasing boiler efficiency and effective utilization

Pending Publication Date: 2018-06-26
HUANENG CLEAN ENERGY RES INST
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Biomass fuel needs to be dried to 20% moisture before entering the gasifier. The usual practice is to extract the high-temperature flue gas (200-300°C) from the coal-fired power plant after the economizer to heat and dry it. will reduce boiler efficiency

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  • System and method for recycling sensible heat of biomass gasification gas

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings. Those skilled in the art understand that the following content does not limit the protection scope of the present invention. Any improvements and changes made on the basis of the present invention are within the protection scope of the present invention.

[0018] The present invention is implemented through the following specific embodiments: as figure 1 As shown, a sensible heat recovery system for biomass gasification gas includes a dry conveying system composed of a biomass dryer 1 and a screw feeder 2, a biomass gasifier 3, a cyclone dust collector 4 and a pressurized Gasification system composed of fan 6, sensible heat recovery system composed of gas cooler 5, circulation pump 7, primary air heater 8, dry air preheater 9 and condensed water heater 10.

[0019] The biomass dryer 1 , the screw feeder 2 , the biomass gasifier 3 , the cyclone dust collector 4 , the ga...

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Abstract

The invention provides a system and a method for recycling sensible heat of biomass gasification gas. A drying and conveying system composed of a biomass dryer and a screw feeder is used for conveyinga biomass fuel into a gasification system composed of a biomass gasifier, a cyclone dust collector and a booster fan, then synthesis gas is produced and is subsequently conveyed into a power plant boiler for generating power; a three-level sensible heat recycling system composed of a gas cooler, a circulating pump, a primary air heater, a dry air preheater and a condensation water heater is used,so that the sensible heat of the high-temperature biomass gas can be flexibly and effectively used for drying the biomass raw materials, preheating the primary air and heating the condensation waterof the power plant boiler; the energy can be effectively utilized; and the efficiency of the boiler can be improved.

Description

technical field [0001] The invention belongs to the technical field of energy and chemical industry, and in particular relates to a sensible heat recovery system and method for biomass gasification gas. Background technique [0002] my country is rich in biomass resources, and the use of biomass gasification coupled power generation technology can develop new energy, save coal, and improve the energy structure. Biomass gasification coupled power generation technology means that the dried biomass raw material is sent to the circulating fluidized bed gasifier through the screw feeder for gasification, and the high-temperature gas generated is sent to the existing power plant boiler after dust removal, cooling and metering Combustion in the middle, use the existing steam turbine generator set to generate electricity. This method of biomass gasification coupling power generation has good versatility, the power generation is easy to measure, and has little impact on the original...

Claims

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Application Information

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IPC IPC(8): C10J3/00C10J3/72C10J3/84
CPCC10J3/00C10J3/72C10J3/84C10J2300/1603C10J2300/0956C10J2300/0909C10J2300/0916C10J2300/1807Y02P20/129Y02P20/10
Inventor 许世森樊强陶继业刘沅王鹏杰李小宇任永强
Owner HUANENG CLEAN ENERGY RES INST
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