Trapping method and trapping system for tar in coal gas

A technology for coal gas and tar, which is applied in the field of capture systems and methods for capturing tar in coal gas, and can solve the problems of high investment and production and operation costs of wastewater treatment equipment and difficult treatment.

Inactive Publication Date: 2017-02-22
内蒙古京能锡林煤化有限责任公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, this tar recovery process often produces a large amount of refractory phenol and ammonia wastewater, resulting in high equipment investment and production and operation costs for wastewater treatment plants

Method used

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  • Trapping method and trapping system for tar in coal gas
  • Trapping method and trapping system for tar in coal gas

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Experimental program
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Embodiment Construction

[0051] The core of the present invention is to provide a method for collecting tar in gas, which can not only ensure the oil removal effect, reduce the investment of the electric tar collector, but also avoid the generation of difficult-to-treat wastewater, thereby reducing the investment and production of wastewater treatment equipment. cost. On this basis, another core of the present invention is to provide a corresponding gas tar capture system.

[0052] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0053] It should be noted that the orientation words "upper and lower" herein are established based on the drawings in the specification, and their appearance should not limit the protection scope of the present invention.

[0054] Please refer to figure 1 , figure 1 It is...

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Abstract

The invention discloses a trapping method for tar in coal gas. The trapping method comprises steps as follows: gas-gas heat exchange: low-temperature gas exchanges heat with high-temperature coal gas, heat of the high-temperature gas is recovered, and the use amount of spray tar is reduced; trapping: low-temperature tar is sprayed on the high-temperature coal gas subjected to heat exchange, so that tar gas in the coal gas is condensed, separated out and recovered through trapping; defogging: tar fog drops about to escape are recovered gradually by use of a two-stage defogger. With the adoption of the tar trapping method, tar can be removed from the coal gas repeatedly, that is, the better tar recovery effect is realized in a tar washing manner. Compared with an existing technology for trapping tar through washing, firstly, the tar trapping method cannot produce a large amount of refractory wastewater, so that the investment, production and operation costs of wastewater treatment equipment are reduced; secondly, the trapping rate is high and secondary investment of an electrical tar precipitator is reduced. Besides, the invention further provides a trapping system for the tar in the coal gas.

Description

technical field [0001] The invention relates to the technical field of coal industry, in particular to a method and system for collecting tar in gas. Background technique [0002] Crude gas and raw pyrolysis gas (hereinafter collectively referred to as coal gas) produced during moving bed coal gasification and coal dry distillation pyrolysis usually contain a small amount of coal tar, and the tar in the gas needs to be recovered before entering the downstream process. [0003] At present, the recovery process of tar in gas usually adopts water washing method to wash, low temperature, oil-water separation of cooled oil-containing washing water to obtain coal tar, and regularly discharged washing wastewater is sent to sewage treatment plant after phenol and ammonia recovery. However, this tar recovery process often produces a large amount of refractory phenol and ammonia wastewater, resulting in high equipment investment and production and operation costs for wastewater treatm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/84B01D5/00B01D53/00B01D45/16B01D45/08
CPCB01D45/08B01D45/16B01D53/002C10J3/84Y02P70/10
Inventor 邢凌燕牛延军杨宝军姬晨平刘云辉周福勋
Owner 内蒙古京能锡林煤化有限责任公司
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