High-temperature water vapor pyrolysis-cracking-gasification device and method for solid fuel

A high-temperature water vapor and solid fuel technology, which is applied in the fields of gasification comprehensive utilization, solid combustion pyrolysis, and pyrolysis, can solve the problems of low tar yield, high content of heavy tar components, increased system and technical complexity, etc. problems, to achieve the effect of saving hydrogen consumption and reducing energy consumption

Active Publication Date: 2013-01-02
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, most co-production processes have not yet been promoted and applied, especially the process of co-production of oil products, there are still many problems
Moreover, in the down-bed or fluidized-bed pyrolysis process using hot ash and circulating sand as the solid heat carrier, the obtained solid product semi-coke and solid heat carrier particles are in a solid-solid mixed state, which makes it difficult to separate and obtain pure semi-coke. Coke ...

Method used

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  • High-temperature water vapor pyrolysis-cracking-gasification device and method for solid fuel
  • High-temperature water vapor pyrolysis-cracking-gasification device and method for solid fuel

Examples

Experimental program
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Effect test

Embodiment 1

[0058] Raw material: a kind of bituminous coal with high volatile content, pellet particle size is 20-30mm

[0059] Features: Simulated moving bed pyrolysis reactor

Embodiment 2

[0063] Raw material: a kind of lignite with high volatile content, particle size less than 3mm

[0064] Features: Fluidized bed pyrolysis reactor

[0065] method of execution:

[0066]The coal sample is crushed to less than 3 mm, dried and sent to the feeder; then the material is sent to the fluidized bed pyrolysis reactor; under the high-temperature water vapor generated by the combustion of oxygen and a little excess hydrogen from the hydrogen-oxygen combustion controller Pyrolysis occurs under the action; through the infrared detector connected to the exhaust port of the pyrolyzer, the CO concentration at the outlet is detected in real time, and the average residence time of pulverized coal is adjusted to avoid the gasification reaction of semi-coke under the action of high-temperature water vapor. The thermal state of the volatile matter discharged from the pyrolyzer is directly sent to the thermal cracking reactor, where it is cracked with the high-temperature steam fro...

Embodiment 3

[0068] Raw material: Bituminous coal with high volatile content, pellet particle size of 20-30 mm

[0069] Features: fixed bed pyrolysis reactor

[0070] method of execution:

[0071] The coal sample is crushed and made into coal pellets of a size of 20 mm, which are dried and sent to the feeder; then the coal pellets are sent into a fixed-bed pyrolysis reactor (two pyrolysis reactors in parallel, used alternately); The hydrogen-oxygen combustion controller pyrolyzes under the action of high-temperature water vapor produced by combustion of oxygen and a little excess hydrogen; during the reaction process, the CO concentration at the outlet is detected by an infrared detector connected to the exhaust port of the pyrolyzer; when When the CO concentration starts to rise, stop the reaction in the pyrolyzer to avoid the gasification reaction between semi-coke and high-temperature water vapor; switch the valve so that high-temperature water vapor passes through another pyrolysis r...

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Abstract

The invention relates to the comprehensive utilization field of a solid fuel, specifically to high-temperature water vapor pyrolysis-cracking-gasification device and method for the solid fuel. The method includes introducing the high-temperature water vapor generated by the combustion of O2 and H2 into the solid fuel for low-temperature pyrolysis, to separate out the volatile matter and obtain an oil gas product and pyrolysis semi-coke; performing thermal cracking to the oil gas product in hot state under the action of the high-temperature water vapor, and separating to obtain a lightweight product and a heavyweight component; gasifying the pyrolysis semi-coke and the heavyweight component under the action of oxygen-carrying high-temperature water vapor, to obtain water gas; and allowing the reaction between the water gas and water vapor, to obtain CO2 and H2, separating, storing the CO2, and using the H2 in power generation. The invention is characterized in that the high-temperature water vapor generated by hydrogen-oxygen combustion is used to provide heat; the oil gas product generated by the pyrolysis directly enters the thermal cracking reactor in hot state; higher-added value products, such as lightweight olefins and BTX, are obtained via the thermal cracking; and the clean and high-efficiency comprehensive utilization of the solid fuel is realized through fractional extraction.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of pyrolysis, thermal cracking and gasification of solid combustion. Specifically, the invention relates to a high-temperature steam pyrolysis-cracking-gasification device and method for solid fuel. Background technique [0002] Carbon-containing solid fuels can be processed by various thermal conversion processes (such as combustion, gasification, liquefaction, and pyrolysis, etc.) to obtain heat energy, electrical energy, chemicals, or fuels. At present, most industrial processing methods are to convert coal, biomass, etc. Carbon raw materials are considered as a single material, which is all converted into a single product through a single process. The processes of direct liquefaction, indirect liquefaction and gasification of coal are mainly to obtain a target product, and the process of obtaining oil and gas products is relatively complicated, with harsh conditions and high investment...

Claims

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Application Information

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IPC IPC(8): C01B3/02C01B3/12C01B3/32C01B3/34C10J3/66C10J3/64C10B49/02C10B57/00C01B31/20C01B32/50
CPCY02A50/20Y02E20/18Y02P30/00
Inventor 宋文立林伟刚李松庚许志宏郝丽芳都林王泽姚建中
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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