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Coal pyrolysis and gasification coupling technology and device

A coupling device and pyrolysis gas technology, which is applied in the field of coal chemical industry, can solve the problems of unsuitable full-size raw coal, low yield of coal tar, high energy consumption, etc., and achieve the effects of increased yield, high hydrogen content, and high concentration

Inactive Publication Date: 2016-10-12
BEIJING GUODIAN FUTONG SCI & TECH DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is to overcome the defects of high energy consumption, low coal tar yield and poor quality, and inapplicability to full-grain raw coal in the existing coal pyrolysis and gasification coupling process, thereby providing an energy-consuming Coal pyrolysis gasification coupling process and device with small size, high coal tar yield and good quality, and full particle size feed of raw coal can be realized

Method used

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  • Coal pyrolysis and gasification coupling technology and device
  • Coal pyrolysis and gasification coupling technology and device

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Embodiment 1

[0041] Such as figure 1 As shown, the coal pyrolysis gasification coupling process described in this embodiment includes the following steps:

[0042] Sieve the raw coal and divide it into pulverized coal with a particle size of <6mm and raw coal with a particle size of ≥6mm; where:

[0043] The pulverized coal with a particle size of <6 mm enters the gasification furnace and is gasified under the action of a gasification agent to obtain hot coal gas. The hot coal gas is dedusted to obtain purified coal gas. In this embodiment, the gasification furnace It is a circulating fluidized bed gasifier, and the gasification agent used is air. Of course, in other embodiments, oxygen-enriched gas, oxygen or a mixture of oxygen and water vapor can also be selected as the gasification agent according to needs;

[0044] The raw coal with a particle size ≥ 6mm enters the fixed bed pyrolysis furnace, and in the drying section of the fixed bed pyrolysis furnace, the raw coal is dried with ho...

Embodiment 2

[0048] Such as figure 2 As shown, the coal pyrolysis gasification coupling device described in this embodiment includes:

[0049] Screening device 1, which is provided with a first outlet and a second outlet, the first outlet is used to discharge pulverized coal with a particle size of <6 mm, and the second outlet is used to discharge raw coal with a particle size of ≥6 mm;

[0050] A gasification furnace 2, the inlet of which is connected to the first outlet, and the outlet of the gasification furnace 2 is connected to a high-temperature dust removal device 3;

[0051] Fixed-bed pyrolysis furnace 4, which is provided with a drying section 41, a dry distillation section 42 and a cooling section 43 connected in sequence, the drying section 41 is connected to the second outlet, and the dry distillation section 42 is connected to the high-temperature dedusting The gas outlets of the device 3 are connected, and a pyrolysis gas outlet and a semi-coke outlet are also provided in t...

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Abstract

The invention provides a coal pyrolysis and gasification coupling technology and device. According to the technology, hot coal gas generated through coal gasification makes direct contact with dry coal, and the dry coal is subjected to dry distillation with the high-temperature sensible heat of the hot coal gas so that on one hand, the high-temperature sensible heat of the hot coal gas can be fully utilized, the heat exchange efficiency can be improved, and thus the energy consumption of the whole technology can be greatly reduced; on the other head, due to the fact that hydrogen in the gasified hot coal gas is high in content and concentration, the yield of tar can be increased through the hydrogen-rice atmosphere; furthermore, only large particle size raw coal is subjected to dry distillation, and thus the quality of the tar is improved; besides, in the technology, raw material coal is screened to be divided into small particle size pulverized coal and large particle size raw coal, and then gasification and dry distillation treatment are carried out on the pulverized coal and the raw coal respectively, so that the raw material coal within the full particle size range can be treated with the technology, and full particle size feeding of the raw material coal is achieved. According to the device, a purification device for the hot coal gas does not need to be independently arranged, and thus the energy consumption of the system can be easily reduced.

Description

technical field [0001] The invention relates to the technical field of coal chemical industry, in particular to a coal pyrolysis and gasification coupling process and device. Background technique [0002] my country is a country short of oil and gas, and relatively rich in coal resources. Coal accounts for more than 65% of primary energy. At present, my country's coal production and total consumption rank first in the world, and coal production is still showing an upward trend year by year. However, more than half of the existing coal resources in my country are low-rank coals. Because low-rank coals usually have the characteristics of high oxygen content, high moisture, poor stability and low calorific value, they are difficult to be used as raw materials for large-scale industrial gasification. , and more are only used as power fuels in local areas, but the discharge of a large amount of pollutants produced by the combustion of low-rank coal has led to the dual pressure of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/04C10B57/00C10K1/02C10K1/04C10B57/18C10J3/00
CPCC10B53/04C10B57/00C10B57/005C10B57/18C10J3/00C10K1/02C10K1/046C10L2290/02C10L2290/04C10L2290/06C10L2290/08
Inventor 苗文华陈家全张旭辉吴鹏屈万领张云鹏林红
Owner BEIJING GUODIAN FUTONG SCI & TECH DEV
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