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Improved alkaline process flow with coking sewage treatment (A/O) method

A technology for coking sewage and process flow, which is applied in the fields of degassed water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Efficiency, simplification of process, effect of reducing NH3-N content

Inactive Publication Date: 2011-03-30
JILIN DONGSHENG COKING
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  • Abstract
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  • Application Information

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Problems solved by technology

[0002] At present, many domestic coking enterprises use activated sludge biological process (A / O) for wastewater treatment, and A / O, A 2 / O, A / O 2 and other processes, among which A 2 The / O process is the most widely used. The treatment of coking sewage requires adding alkali to the O pool to supplement the alkalinity required for the nitrification reaction. The alkali consumption is 1t / d, and the work is labor-intensive. Manual alkali addition is required, resulting in production Inconvenience

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  • Improved alkaline process flow with coking sewage treatment (A/O) method

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[0011] As shown in the figure, the lye is pumped to the alkali-adding pump 4 through the lye dissolving tank to the lye pipeline 14 and the lye is passed through the lye to the ammonia distillation tower pipeline 13 (concentration 35-40%) into the top of the ammonia distillation tower 1 for spraying, After heat exchange by heat exchanger 2, the remaining ammonia water is heated from about 70°C to about 98°C and enters ammonia distillation tower 1, where it is directly stripped by 0.5Mpa steam, and the steamed ammonia (volatile ammonium and fixed ammonium ) into the ammonia splitter and cooled with circulating water at 32°C, the condensed liquid is directly returned to the top of the ammonia distillation tower 1 for reflux, and the uncondensed NH 3 Not less than 10% of the ammonia is transported through the ammonia gas pipeline 18 of the desaturator and enters the saturator to produce ammonium sulfate. From the bottom of the ammonia distillation tower 1, the ammonia distillatio...

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Abstract

The invention relates to an improved alkaline process flow with a coking sewage treatment (A / O) method, belonging to the field of environment protection and waste water treatment technology; the improved alkaline process flow aims at effectively treating coking sewage, improving the ammonia recovery rate and reducing the content of NH3-N in waste water, alkaline process is not needed in the sewage treatment section, thereby having the effect of increasing production, reducing consumption, reducing environment pollution and energy saving and emission reduction and having high economic and social benefits.

Description

technical field [0001] The invention relates to the improvement of the coking sewage treatment (A / O) process of adding alkali, which belongs to the technical field of environmental protection and waste water treatment, and especially refers to the process of using the SDN process to treat the coking waste water. technical background [0002] At present, many domestic coking enterprises use activated sludge biological process (A / O) for wastewater treatment, and A / O, A 2 / O, A / O 2 and other processes, among which A 2 The / O process is the most widely used. The treatment of coking sewage requires adding alkali to the O pool to supplement the alkalinity required for the nitrification reaction. The alkali consumption is 1t / d, and the work is labor-intensive. Manual alkali addition is required, resulting in production inconvenience. Through technical research, the inventor has repeatedly studied the process and adopted an improved process, which has achieved the effects of incr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C01C1/02C02F3/30C02F1/40C02F1/52C02F1/20
Inventor 赵永宽安树君
Owner JILIN DONGSHENG COKING