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Double fluidized bed pyrolysis combustion waste heat utilization system and method

A technology of double fluidized bed and circulating fluidized bed

Pending Publication Date: 2020-05-15
山西平朔煤矸石发电有限责任公司
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Problems solved by technology

[0004] The purpose of the present invention is to provide a dual fluidized bed pyrolysis combustion waste heat utilization system and method in order to solve the technical problems of waste heat loss, low system efficiency and environmental pollution in the dual fluidized bed pyrolysis combustion system

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  • Double fluidized bed pyrolysis combustion waste heat utilization system and method
  • Double fluidized bed pyrolysis combustion waste heat utilization system and method

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with drawings and embodiments.

[0034] like figure 1 As shown, a dual fluidized bed pyrolysis combustion waste heat utilization system in this embodiment includes a circulating fluidized bed power generation system and a coal pyrolysis system; the circulating fluidized bed power generation system consists of a boiler 1, a separator 23, The air preheater 2, the dust remover 3, the desulfurization tower 4, the first steam-gas heat exchanger 5 and the chimney 6 are composed, the separator 23 is a cyclone separator, the flue gas outlet of the boiler 1 and the flue gas of the separator 23 The gas inlet is connected through a pipeline, the ash outlet of the separator 23 is connected with the furnace of the boiler 1 through a pipeline, the flue gas outlet of the separator 23 is connected with the flue gas inlet of the air preheater 2 through a pipeline, and the air preheater The flue gas outlet of 2 is conn...

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Abstract

The invention relates to a double fluidized bed pyrolysis combustion waste heat utilization system and method, and aims to solve the technical problems of waste heat loss, low system efficiency and environmental pollution in a double fluidized bed pyrolysis combustion system. The system is mainly composed of a circulating fluidized bed power generation system and a coal pyrolysis system, a heat source is provided for a raw coal preheater of the coal pyrolysis system is through hot flue gas behind a dust remover, and the flue gas obtained after heat release serves as secondary air to return toa boiler; and part of steam from an outlet of a high-temperature superheater of the coal pyrolysis system is used for heating flue gas at an outlet of a desulfurizing tower of the power generation system, the other part of steam heats circulating coal gas of the pyrolysis system, and the steam obtained after heat release is used as steam sources of purging, heat tracing, material conveying and thelike of other equipment pipelines of the pyrolysis system. Waste heat utilization of the circulating fluidized bed power generation system and the coal pyrolysis system is combined, the efficiency ofa combustion furnace and a pyrolysis furnace is improved while the smoke exhaust loss is reduced, the generation amount of phenol-containing wastewater is reduced, and the pyrolysis efficiency is improved.

Description

technical field [0001] The invention belongs to the fields of thermal power generation technology and coal pyrolysis technology, and in particular relates to a system and method for utilizing waste heat of pyrolysis and combustion in double fluidized beds. Background technique [0002] In recent years, the state has focused on encouraging the clean and efficient utilization technology of low-quality coal graded transformation, in which the circulating fluidized bed power generation system and the fluidized bed pyrolysis system are coupled to realize the combination of heat, electricity, gas and tar in one system. Production. Realize the optimization of the overall benefit of the coal utilization system, and greatly increase the utilization value and utilization efficiency of inferior bituminous coal. [0003] In the dual-fluidized bed pyrolysis combustion system, although the coal has been utilized in different grades, there is still a certain amount of waste heat loss unav...

Claims

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Application Information

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IPC IPC(8): F23J15/02F23J15/06F23J15/08F01K17/02F22G1/00F23L9/00F23L15/00F28F27/02C10B49/10C10B53/04
CPCF23J15/022F23J15/02F23J15/08F23J15/06F23L15/00F23L9/00F22G1/00F28F27/02C10B49/10C10B53/04F01K17/02F23J2215/20Y02P20/129Y02E20/34
Inventor 王亚琴乔岗杰刘红刚张润元赵云凯杨彦卿何利昌尉万红延彪石龙龙武建芳赵耀芳周银行廖光明
Owner 山西平朔煤矸石发电有限责任公司
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