Downer-moving bed coupling pyrolysis reaction device

A technology of moving bed reactor and reaction device, which is applied in the direction of direct heating dry distillation, preparation of liquid hydrocarbon mixture, special form of dry distillation, etc. It can solve the problems of short residence time of solid fuel and long residence time of pyrolysis gas, and achieve high thermal efficiency , The process is simple and reliable

Inactive Publication Date: 2012-09-05
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0008] In order to overcome the problems existing in existing pyrolysis reactors such as the need for fluidized gas, long residence time of pyr

Method used

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Examples

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example 1

[0032] Example 1 Pyrolysis of coal in a down bed-moving bed coupled rapid pyrolysis reactor

[0033] Such as figure 2 As shown, the 850°C hot ash separated from the cyclone separator of the circulating fluidized bed boiler and the coal with a particle size of less than 1mm enter the descending bed reactor 1. The descending bed reactor 1 is equipped with a baffle-type gravity solid-solid mixer 8. The hot ash and coal have fully mixed heat transfer, and pyrolysis reaction occurs. The outlet of the descending bed reactor 1 is equipped with a baffle 6, relying on the difference of gas-solid inertia, the pyrolysis vapor and the solid mixture are quickly separated. The pyrolysis vapor leaves the pyrolysis reactor from the pyrolysis gas outlet 7 of the moving bed and enters In the subsequent quenching device, in the moving bed reactor 3, the temperature of the solid mixture drops to 650°C, the large solid fuel particles that are not fully pyrolyzed continue to be pyrolyzed, and the mi...

example 2

[0034] Example 2 Pyrolysis of oil shale in a down bed-moving bed coupled fast pyrolysis reactor

[0035] Such as figure 2 As shown, the 850°C hot sand separated from the cyclone separator of the circulating fluidized bed boiler and the oil shale with a particle size of less than 1mm are mixed and transferred in the descending bed reactor 1, and the temperature of the solid mixture drops to 550 after reaching the moving bed. ℃, the pyrolysis steam is quenched to obtain shale oil and coal gas. The mixture of hot ash and semi-coke enters the combustion furnace to burn, and the hot ash is heated and circulated again.

example 3

[0036] Example 3 Pyrolysis of biomass in a down-bed-moving-bed coupled fast pyrolysis reactor

[0037] Such as figure 2 As shown, the 850°C hot sand separated from the cyclone separator of the circulating fluidized bed combustion furnace and the biomass with a particle size of less than 1mm are mixed and transferred in the descending bed reactor 1, and the temperature of the solid mixture drops to 500 after reaching the moving bed. ℃, the biomass pyrolysis steam is quenched to obtain biomass pyrolysis oil and coal gas. The mixture of hot sand and biomass semi-coke enters the combustion furnace for combustion, and the hot sand is heated and circulated again.

[0038] When using the descending bed-moving bed coupled rapid pyrolysis reaction device of the present invention to pyrolyze solid fuels in Examples 1 to 3, compared with using a descending bed pyrolysis reactor alone or a moving bed pyrolysis reactor alone , The residence time of the gas phase can be controlled within 1 sec...

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Abstract

The invention relates to a downer-moving bed coupling pyrolysis reaction device. The pyrolysis reaction device comprises a downer reactor (1) and a moving bed reactor (3), wherein the mixture of a solid thermal carrier and solid fuel isolated from the bottom of the downer reactor (1) further enters the moving bed reactor (3) to enable the solid fuel and the solid thermal carrier to be fully mixed and transfer heat for pyrolysis, pyrolysis gas generated by pyrolysis enters a subsequent quenching device through a pyrolysis gas outlet (7) at the upper end of the moving bed reactor (3), and products - liquid fuel and coal gas are obtained after condensation. The downer-moving bed coupling pyrolysis reaction device has the advantages that by adopting the device, the residence time of gas phase can be controlled within 1 second, the residence time of solid fuel particles can be prolonged by tens of minutes, the yield of the liquid product can be increased by about 20% to the maximum extent, the whole process is simpler and more reliable, and the thermal efficiency is higher.

Description

Technical field [0001] The present invention relates to the field of solid fuel pyrolysis, in particular, the present invention relates to a descending bed-moving bed coupled pyrolysis reaction device. Background technique [0002] The solid fuel represented by coal is usually composed of organic matter and inorganic matter. During the heating process, the organic matter will undergo a thermal decomposition reaction to generate organic products and gases, while remaining semi-coke and ash. Using rapid pyrolysis technology, the solid fuel is heated to 400-750°C in less than 1 second, and a large amount of complex organic matter in the solid fuel is quickly decomposed into active organic intermediates. These products maintain the original non-equilibrium state by quenching , So as to obtain as many valuable liquid products, coal gas and semi-coke as possible. [0003] Many research institutions at home and abroad have developed various types of fast pyrolysis reactors for the produc...

Claims

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Application Information

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IPC IPC(8): C10B53/04C10B53/06C10B49/18C10B53/02C10G1/00
CPCY02E50/10
Inventor 宋文立林伟刚李松庚都林王泽郝丽芳
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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