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Device and method for direct catalytic cracking or reforming of high-temperature pyrolysis gas of carbon-containing substance

A high-temperature pyrolysis and catalytic cracking technology, which is applied in the direction of combustible gas purification, chemical modification of combustible gas, and heat treatment of combustible gas, can solve the problems of ecological environment threat, complex composition, waste of water resources, etc., and achieve the elimination of investment and Effects of operating costs, shortening the process flow, and saving energy

Pending Publication Date: 2021-08-24
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cold shock of raw gas and ammonia water and the recovery of chemical products are the most important sources of pollutant discharge in coking plants, especially the produced wastewater containing phenol and cyanide, which has complex components and is the most difficult type of industrial wastewater to treat, posing a serious threat to the ecological environment. It also wastes a lot of water

Method used

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  • Device and method for direct catalytic cracking or reforming of high-temperature pyrolysis gas of carbon-containing substance
  • Device and method for direct catalytic cracking or reforming of high-temperature pyrolysis gas of carbon-containing substance
  • Device and method for direct catalytic cracking or reforming of high-temperature pyrolysis gas of carbon-containing substance

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Experimental program
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Effect test

Embodiment 1

[0061] The device used in this embodiment includes a pyrolysis cyclone separator 1, a multistage tar cracking reactor 2, a catalyst buffer tank 3, a riser carbon oxidation reactor 4, a fluidized bed charcoal regenerator 5, a cyclone dust collector 6, a Heat cooler 7, oil-gas separator 8, induced draft fan 9 and thermostat 10. The multi-stage tar cracking reactor 2 is composed of 4 stages of cyclone contact separators, wherein the form of cyclone contact separators is Humboldt type. The inner diameter of the riser charcoal oxidation reactor 4 is 500mm and the height is 6m; the inner diameter of the lower straight cylinder part of the fluidized bed charcoal regenerator 5 is 2000mm and the height is 8m. The catalyst buffer tank 3 has an inner diameter of 1000 mm and a height of 2 m; the bottom uniform distributors of the fluidized bed charcoal regenerator 5 and the catalyst buffer tank 3 are multi-tube type, and the opening ratio is 4%.

[0062] The pyrolysis gas from the high-t...

Embodiment 2

[0067] The device used in this embodiment includes a pyrolysis cyclone separator 1, a multistage tar cracking reactor 2, a catalyst buffer tank 3, a riser carbon oxidation reactor 4, a fluidized bed charcoal regenerator 5, a cyclone dust collector 6, a Heat cooler 7, oil-gas separator 8, induced draft fan 9 and thermostat 10. The multi-stage tar cracking reactor 2 is composed of 4 stages of cyclone contact separators, wherein the form of cyclone contact separators can be Humboldt type. The inner diameter of the riser charcoal oxidation reactor 4 is 500mm, and the height is 15m; the inner diameter of the lower straight cylinder part of the fluidized bed charcoal regenerator 5 is 1500mm, and the height is 5m; the inner diameter of the catalyst buffer tank 3 is 800mm, and the height is 2m; The bottoms of the bed charcoal-burning regenerator 5 and the catalyst buffer tank 3 are equipped with cone-shaped distributors with an opening ratio of 4.5%.

[0068] The pyrolysis gas from t...

Embodiment 3

[0073]The device used in this embodiment includes a pyrolysis cyclone separator 1, a multistage tar cracking reactor 2, a catalyst buffer tank 3, a riser carbon oxidation reactor 4, a fluidized bed charcoal regenerator 5, a cyclone dust collector 6, a Heat cooler 7, oil-gas separator 8, induced draft fan 9 and thermostat 10. The multi-stage tar cracking reactor 2 is composed of 4 stages of cyclone contact separators, wherein the form of cyclone contact separators can be Humboldt type. The inner diameter of the riser charcoal oxidation reactor 4 is 750mm and the height is 10m; the inner diameter of the lower straight cylinder part of the fluidized bed charcoal regenerator 5 is 2000mm and the height is 7m; the inner diameter of the catalyst buffer tank 3 is 1000mm and the height is 2.5m; Bottoms of the fluidized bed charcoal-burning regenerator 5 and the catalyst buffer tank 3 are both provided with plate-tube distributors, and the opening ratio is less than 4.6%.

[0074] The ...

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Abstract

The invention relates to a device and method for direct catalytic cracking or reforming of high-temperature pyrolysis gas of a carbon-containing substance. The device comprises a pyrolysis gas cyclone separator, a multi-stage tar cracking reactor, a riser carbon oxidation reactor, a fluidized-bed charking regenerator, a heat exchange cooler, an oil-gas separator and the like. According to the invention, high-temperature pyrolysis gas from a coke oven or a semi-coke furnace is in reverse contact with catalyst powder in the multi-stage tar cracking reactor to undergo a catalytic cracking or reforming reaction, and a catalyst is subjected to sufficient charking regeneration through a riser and a fluidized bed and is recycled. According to the invention, heavy-component tar in the high-temperature pyrolysis gas can be directly cracked or reformed into light components, and an ammonia water chilling process of the high-temperature pyrolysis gas is canceled, so problem in treatment of phenol-and-cyanogen-containing wastewater are fundamentally solved.

Description

technical field [0001] The invention relates to a direct catalytic cracking or reforming device and method for high-temperature pyrolysis gas of carbon-containing substances, belonging to the field of chemical industry. Background technique [0002] With my country's commitment to carbon peaking in 2030 and carbon neutrality in 2060, the high-value utilization of solid fossil fuel coal and the recycling of biomass have attracted more and more attention. Coal and biomass are both carbonaceous substances, the main component of which is carbon (C), but also contains a large amount of hydrogen (H). The carbon-to-hydrogen ratio (C:H) in coal is about 1:0.8. In addition to the energy generated by its combustion, the chemical energy of the elements and compounds in it has not been effectively utilized, but the compounds in it are released at high temperatures and then reused as chemicals, which is the so-called split utilization. At present, the separation and utilization of carbo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10K3/00C10K3/02C10K1/02C10K1/04
CPCC10K1/026C10K3/026C10K3/023C10K3/003C10K1/04
Inventor 胡永琪王建英周理龙李彦菊刘玉敏赵瑞红
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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