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Dephenolization treatment method for coking residual ammonia wastewater

A technology for coking residual ammonia water and treatment methods, which is applied in the field of environmental protection treatment in the coking industry. It can solve the problems of complex post-processing procedures and large residual ammonia water treatment volume, reduce the difficulty of stripping treatment, reduce sewage output, and increase recovery rate. Effect

Active Publication Date: 2014-09-10
河北协同水处理技术有限公司
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Problems solved by technology

However, this method still does not solve the problems of large residual ammonia treatment volume and complicated post-treatment procedures.

Method used

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  • Dephenolization treatment method for coking residual ammonia wastewater

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Embodiment Construction

[0048] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0049] A kind of dephenolization processing method of coking residual ammonia water, such as figure 1 As shown, the raw coal gas is cooled by spraying circulating ammonia water in the gas collecting pipe, and enters the gas-liquid separator 1 through the raw coal gas input pipeline 18, and the residual ammonia water and residual gas of fixed ammonium are separated. The residual ammonia water of fixed ammonium enters the fixed ammonium dephenolization treatment unit for post-treatment, and the remaining gas continues to enter the gas primary cooler 2 for cooling to obtain the residual ammonia water of free ammonia, which is temporarily stored in the condensation tank 4 of the primary gas cooler, and then Enter the free ammonia dephenolization treatment unit for post-treatment.

[0050] (1) Post-treatment of residual ammonia water after immobilizing ammonium

[0051] ...

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Abstract

The invention discloses a dephenolization treatment method for coking residual ammonia wastewater. Fixed ammonium surplus ammonia water and free ammonia surplus ammonia water are respectively obtained after a raw coke oven gas is processed, wherein the fixed ammonium surplus ammonia water enters a fixed ammonium dephenolization treatment unit for post-treatment, which comprises three procedures, namely oil-water separation, oil removal in a sedimentation manner, and fixed ammonium decomposition; the free ammonia surplus ammonia water enters a free ammonia dephenolization treatment unit for post-treatment, which comprises five procedures, namely oil removal in a sedimentation manner, extraction and oil removal, steam stripping and dephenolization, distillation and dephenolization, and extraction and dephenolization. By adopting the dephenolization treatment method, the sewage output is effectively reduced, the biochemical treatment pressure is reduced, meanwhile, phenol in the residual ammonia water is effectively recovered, the heat of each procedure is reasonably utilized, the energy cost is effectively reduced, and the chemical oxygen demand (COD) value of the processed wastewater is very low, so as to lay a foundation for simplifying treatment of biochemical wastewater.

Description

technical field [0001] The invention relates to a method for removing phenols from coking residual ammonia water, and belongs to the technical field of environmental protection treatment in the coking industry. Background technique [0002] During the coking process, a large amount of volatile substances, namely raw coal gas, will be produced. The composition of raw coal gas is complex, including water vapor, tar vapor, crude benzene, ammonia, hydrogen sulfide, phenol, ammonium salt, cyanide and other substances. The temperature of raw gas is as high as 650℃~700℃. After cooling down, condensate is obtained. The condensate mainly contains water, tar, crude benzene, ammonia, phenol, etc.; part of the condensate is used as circulating ammonia water, and the remaining condensate is called It is the remaining ammonia water, which is treated and discharged as waste water. [0003] Traditional treatment methods for residual ammonia include the following two methods: [0004] 1. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F9/10C01C1/10C10K1/00C10K1/04C10K1/06C07C39/04C07C37/68
CPCY02P20/10Y02P20/50
Inventor 韩卫荣次新波李欢欢岳学军
Owner 河北协同水处理技术有限公司
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