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Coal gasification black water and grey water treatment system and method with high heat recovery efficiency

A recovery efficiency and treatment system technology, applied in the direction of heating water/sewage treatment, degassed water/sewage treatment, return water treatment, etc., can solve the problems of low energy utilization rate, heavy maintenance workload, etc., to improve energy utilization rate , Reduce the maintenance workload, improve the effect of heat recovery efficiency

Pending Publication Date: 2017-07-14
BEIJING QING CHUANG JIN HUA TECH CO LTD
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Problems solved by technology

[0007] The object of the present invention is to solve the above-mentioned deficiencies in the prior art, and provide a coal gasification black water and gray water treatment system and method with high heat recovery efficiency. The system and method can effectively solve the problem by improving the existing technology. Problems such as low energy utilization rate and heavy maintenance workload in the existing process

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  • Coal gasification black water and grey water treatment system and method with high heat recovery efficiency

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Embodiment Construction

[0031] The technical solutions and technical effects of the present invention will be further described below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the following embodiments are used to illustrate the present invention, but not to limit the scope of the present invention.

[0032] refer to figure 2 , shows a coal gasification black water and gray water treatment system and process flow according to an embodiment of the present invention. The system includes a high-pressure flash tank (201), a low-pressure flash tank (202), a vacuum flash tank (203), a settling tank (204), a gray water tank (205), a low-pressure gray water pump (206), a deaerator (207), deaeration water pump (208), hot water tower (209), high-pressure gray water pump (210), vacuum flash condenser (211), flash vacuum pump (212), flash vacuum pump separation tank (213), Air cooler (214), air separation tank (215), flocculant preparation tan...

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Abstract

The invention relates to a coal gasification black water and grey water treatment system with high heat recovery efficiency. The treatment system is characterized in that grey / black water from a gasification segment is subjected to three-stage flash evaporation treatment, namely, high-pressure flash evaporation, low-pressure flash evaporation and vacuum flash evaporation, and direct heat exchange is performed through a hot water tower. In the coal gasification black water and grey water treatment system disclosed by the invention, direct heat exchange equipment is provided, so that indirect heat exchange equipment is omitted, the heat recovery efficiency is increased, and the energy utilization rate is increased; meanwhile, the equipment quantity and work flow are simplified on the whole, so that the equipment blocking risk is lowered, and the equipment overhauling workload is greatly lowered. The invention further provides a coal gasification black water and grey water treatment method with high heat recovery efficiency.

Description

technical field [0001] The invention relates to the technical field of coal gasification equipment, in particular to a coal gasification black water and gray water treatment system and method with high heat recovery efficiency. Background technique [0002] The efficient and clean utilization of coal has always been a major technical problem in my country's environmental protection and energy fields, and it is also one of the key technologies that affects the proportion structure of my country's primary energy. Coal gasification is one of the main uses of coal in my country at present, and it is the main way to convert primary energy into relatively clean secondary energy. The current popular coal gasification technology is mainly entrained bed coal gasification, and the entrained bed technology is divided into two types according to different feed conditions: coal water slurry gasification and dry powder gasification. Regardless of coal-water slurry gasification or dry pow...

Claims

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Application Information

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IPC IPC(8): C02F9/10
CPCC02F9/00C02F1/001C02F1/06C02F1/20C02F1/52C02F2303/10C02F2301/04
Inventor 雷玉龙张本凤岳博岳军宋丹丹王帅
Owner BEIJING QING CHUANG JIN HUA TECH CO LTD
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