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Thermal pyrolysis combination method and device

A pyrolysis gasification and combined device technology, which is applied in the field of coal chemical industry, can solve the problems of low calorific value and achieve the effects of low tar content, high calorific value of gas and simple system

Active Publication Date: 2011-10-12
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coal gas produced by gasification does not contain tar, but when oxygen-enriched or pure oxygen and pressurization methods are not used, the calorific value is low

Method used

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  • Thermal pyrolysis combination method and device
  • Thermal pyrolysis combination method and device
  • Thermal pyrolysis combination method and device

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Experimental program
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Effect test

Embodiment 1

[0043] Such as figure 1 In the pyrolysis and gasification combined method and device of the present invention shown, the coal is sent to the low-speed bed pyrolysis furnace for pyrolysis, and the semi-coke produced is sent to the circulating fluidized bed gasification chamber for gasification; the cyclone separator collects The solid particles are sent into the pyrolysis furnace as a solid heat carrier to provide heat for coal pyrolysis; the gasification temperature of the gasification furnace is 900°C, and the pyrolysis temperature of the pyrolysis furnace is 800°C. The gas is passed into the upper part of the gasifier to crack the tar in the pyrolysis gas and trap the solid particles in the pyrolysis gas and coal gas; the solid heat carrier is sent into the thermal Above the dense phase area of ​​the pyrolysis furnace; the semi-coke produced by the pyrolysis furnace is sent from the bottom of the pyrolysis furnace to the lower part of the gasifier.

[0044] Such as figure ...

Embodiment 2

[0046] Such as figure 2 In the pyrolysis and gasification combined method of the present invention shown, the biomass is sent to the low-speed bed pyrolysis furnace for pyrolysis, and the semi-coke produced is sent to the circulating fluidized bed gasification chamber for gasification; the cyclone separator traps Solid particles are sent into the pyrolysis furnace as a solid heat carrier to provide heat for biomass pyrolysis; the gasification temperature of the gasification furnace is 1000°C, and the pyrolysis temperature of the pyrolysis furnace is 900°C. The gas and the gas produced by the gasifier are passed into the cyclone separator together to crack the tar in the pyrolysis gas and capture the solid particles in the pyrolysis gas and coal gas; The middle part of the furnace side wall is sent to the top of the dense phase area of ​​the pyrolysis furnace; the semi-coke produced by the pyrolysis furnace is sent to the lower part of the gasifier from the bottom of the pyrol...

Embodiment 3

[0050] Such as image 3 In the pyrolysis and gasification combined method of the present invention shown, the coal is sent to the low-speed bed pyrolysis furnace for pyrolysis, and the semi-coke produced is sent to the circulating fluidized bed gasification chamber for gasification; the solids captured by the cyclone separator Particles are sent into the pyrolysis furnace as a solid heat carrier to provide heat for coal pyrolysis; the gasification temperature of the gasification furnace is 1200°C, and the pyrolysis temperature of the pyrolysis furnace is 1000°C. The pyrolysis gas produced by the pyrolysis furnace and The coal gas produced by the gasification furnace is passed into the cyclone separator together to crack the tar in the pyrolysis gas and capture the solid particles in the pyrolysis gas and coal gas; The middle part of the wall is sent to the upper part of the dense phase area of ​​the pyrolysis furnace; the semi-coke produced by the pyrolysis furnace is sent to ...

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Abstract

The invention discloses a thermal pyrolysis combination method and device and relates to a coal chemical industry technology. A fuel is pyrolyzed in a low-speed bed pyrolyzing furnace, the generated semicoke is discharged from the bottom of the pyrolyzing furnace, sent into a circulating fluid bed gasifier by virtue of a semicoke returning device so as to be subjected to gasification, and coal gas generated by the gasifier, carrying solid particles, enters in a cyclone separator; the gasification temperature of the gasifier is 900-1,200 DEG C, the fuel thermal pyrolysis temperature in the thermal pyrolyzing furnace is 50-200 DEG C lower than the temperature of the gasifier; pyrolysis gas generated in the pyrolyzing furnace is introduced into the upper part of the gasifier or introduced into the cyclone separator together with the coal gas generated in the gasifier; and the solid particles gathered by the cyclone separator are sent above the dense phase area of the pyrolyzing furnace by virtue of the returning device so as to provide heat for pyrolysis of the fuel. The method and device disclosed by the invention are used for pyrolysis and gasification of coal, biomass and other carbon-containing fuels, the generated coal gas has the advantages of high thermal value and low tar content, and the system is simple.

Description

technical field [0001] The invention relates to the technical field of coal chemical industry, in particular to a coal gasification method and device. Background technique [0002] Among the existing coal resources in my country, the coal types with high volatile content account for a relatively high proportion. In addition, some biomass and some carbon-containing wastes also have high volatile content. Through pyrolysis and gasification, the high-value utilization of these medium and high volatile carbon-containing fuels is of great significance to my country's energy supply. [0003] The solid heat carrier pyrolysis method transfers heat through the solid heat carrier in the combustion and pyrolysis circuit, extracts the volatile matter and easily cracked parts in the fuel, and produces tar, which is a pyrolysis oil production method with good applicability. Chinese patent application 200710120053.7 "Low-velocity bed pyrolysis method and device" discloses a solid heat car...

Claims

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Application Information

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IPC IPC(8): C10J3/66C10J3/56C10J3/54C10J3/84C10J3/86
Inventor 吕清刚朱治平李诗媛那永洁高鸣胡超权
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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