Coal gasification wastewater pretreatment system
A coal gasification wastewater and pretreatment technology, applied in degassed water/sewage treatment, water/sewage multi-stage treatment, heating water/sewage treatment, etc., can solve the problems of poor safety, danger, and influence on the promotion and application of coal gasification technology and other problems, to achieve the effect of strong practicability and convenient operation
Pending Publication Date: 2021-07-09
HUANENG CLEAN ENERGY RES INST +1
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Problems solved by technology
[0002] Coal gasification is the leading core technology in the field of IGCC power generation and coal chemical industry. In the coal gasification technology, the black water discharged from the gasifier needs to be treated through the sewage treatment system. In the existing technology, the black water generally carries a large amount of dissolved Crude synthesis gas will be dangerous and less safe if it is directly used in sewage treatment. If steam stripping is used, additional energy consumption will be increased, which seriously affects the promotion and application of coal gasification technology.
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[0024] refer to figure 1 , the coal gasification wastewater pretreatment system of the present invention comprises a black water input pipeline, a medium-pressure flash tank 1, a first heat exchanger 11, a deaerator 5, a vacuum flash tank 2, and a first gas-water separator 3 And the second gas-water separator 4; the black water input pipeline is connected with the inlet of the medium-pressure flash tank 1, and the top outlet of the medium-pressure flash tank 1 passes through the heat release side of the first heat exchanger 11, the first gas-water The heat-absorbing side of the separator 3, the deaerator 5 and the first heat exchanger 11 is connected with the external scrubber; the bottom outlet of the medium pressure flash tank 1 is connected with the inlet of the vacuum flash tank 2, and the vacuum flash The top outlet of the steamer 2 communicates with the inlet of the second gas-water separator 4 through the second heat exchanger 12, and the gas outlet of the second gas-wa...
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The invention discloses a coal gasification wastewater pretreatment system, which comprises a black water input pipeline, a medium-pressure flash tank, a first heat exchanger, a deaerator, a vacuum flash tank, an emptying pipeline, a first gas-water separator and a second gas-water separator, wherein the black water input pipeline is communicated with an inlet of the medium-pressure flash tank; a top outlet of the medium-pressure flash tank is communicated with an external washing tower after passing through a heat release side of the first heat exchanger, the first gas-water separator, the deaerator and a heat absorption side of the first heat exchanger; a bottom outlet of the medium-pressure flash tank is communicated with an inlet of the vacuum flash tank, a top outlet of the vacuum flash tank is communicated with an inlet of the second gas-water separator through the second heat exchanger, and a gas outlet of the second gas-water separator is communicated with the emptying pipeline.The system can remove crude syngas in black water without extra energy consumption, and meanwhile, a part of heat can be recycled.
Description
technical field [0001] The invention belongs to the technical field of wastewater treatment and relates to a coal gasification wastewater pretreatment system. Background technique [0002] Coal gasification is the leading core technology in the field of IGCC power generation and coal chemical industry. In the coal gasification technology, the black water discharged from the gasifier needs to be treated through the sewage treatment system. In the existing technology, the black water generally carries a large amount of dissolved If the crude synthesis gas is directly used in sewage treatment, it will be dangerous and less safe. If steam stripping is used, it will increase additional energy consumption, which seriously affects the promotion and application of coal gasification technology. Contents of the invention [0003] The purpose of the present invention is to overcome the disadvantages of the above-mentioned prior art, and provide a coal gasification wastewater pretreat...
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Login to View More IPC IPC(8): C02F9/10
CPCC02F9/00C02F1/06C02F1/20C02F1/001
Inventor 王鹏杰罗丽珍许世森任永强李小宇陶继业刘刚刘沅陈智樊强张欢
Owner HUANENG CLEAN ENERGY RES INST