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Device and process for treating flash evaporation condensate of coal water slurry gasification system

A technology of condensate and coal water slurry, which is applied in the field of coal chemical industry, can solve problems such as pipeline scaling and system operation instability, and achieve the effects of reducing pollution, improving pipeline scaling problems, and stable operation

Pending Publication Date: 2020-05-08
恒力石化(大连)炼化有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0004] Since the flash condensate contains a small amount of NH 3 、H 2 Harmful substances such as S, which enter the next step of the process, are also likely to cause scaling problems in the pipeline, resulting in unstable operation of the system

Method used

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  • Device and process for treating flash evaporation condensate of coal water slurry gasification system
  • Device and process for treating flash evaporation condensate of coal water slurry gasification system
  • Device and process for treating flash evaporation condensate of coal water slurry gasification system

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Embodiment Construction

[0025] A coal-water slurry gasification flash system, comprising a low-flash separator and a vacuum flash separator, the bottom of the low-flash separator and the vacuum flash separator are all provided with a condensate outlet, and the system is provided with a gas Chemical flash condensate treatment device, such as figure 1 As shown, the device comprises a stripper 5, a top condenser 8, a reflux tank 7, a reflux pump 6 and a non-condensable gas superheater 9; the top of the stripper 5 is provided with a feed inlet, and the steam A reflux liquid inlet is provided above the first floor tray of the stripping tower 5, and a non-condensable gas outlet is provided on the top of the stripping tower 5; the non-condensable gas outlet is connected to the top condenser 8 and the reflux tank successively 7; the reflux tank 7 has a liquid outlet and a gas outlet; the liquid outlet is communicated with the reflux liquid inlet through the reflux pump 6; the gas outlet is communicated with ...

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Abstract

The invention provides a device and process for treating flash evaporation condensate of a coal water slurry gasification system. The gasification flash evaporation condensate treatment device mainlycomprises a stripping tower, an overhead condenser, a reflux tank, a reflux pump and a non-condensable gas superheater; the upper part of the stripping tower is provided with a feed port and a refluxliquid inlet, and the tower top of the stripping tower is provided with a non-condensable gas outlet; the non-condensable gas outlet is sequentially communicated with the overhead condenser and the reflux tank; the reflux tank is provided with a liquid outlet and a gas outlet; the liquid outlet is communicated with the reflux liquid inlet through the reflux pump; the gas outlet is communicated with the non-condensable gas superheater. According to the process, the flash evaporation condensate in the coal water slurry gasification process is subjected to steam stripping by adopting the system,and harmful substances in the flash evaporation condensate are treated, so that the water quality is changed, the problem of pipeline scaling is greatly improved, the process is optimized, and the operation of the system is stabilized.

Description

technical field [0001] The invention relates to the technical field of coal chemical industry, in particular to a device and a process for treating harmful substances in the flash condensate in the coal-water slurry gasification process. Background technique [0002] The coal-water slurry gasification process uses pure oxygen and coal-water slurry as raw materials, adopts an entrained bed reactor, and performs partial oxidation reaction under pressurized and non-catalytic conditions to generate CO, H 2 Syngas is an effective component. In the process of producing syngas, high-temperature syngas will entrain a large amount of coal powder and fine ash. After the high-temperature gas is chilled and cooled, washed and purified, the coal powder and fine ash are washed by chilled water to form gasified black water. After the black water undergoes multi-stage flash evaporation, gray water and flash steam are formed, and the flash steam is condensed to form flash condensate. Since...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C10J3/48C10J3/72
CPCC02F1/042C10J3/485C10J3/72
Inventor 赵爽张记福许可咏
Owner 恒力石化(大连)炼化有限公司
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