Project overview

Etuoke Banner Hongying Coal Coking Co., Ltd. is located in the east of the big coal mine of Etuoke Banner Qipanjing Town, with a coking capacity of 1.2 million tons per year and a 5.5-meter tamping coke oven. At present, the existing biochemical treatment process is as follows: homogenizing oil removal pool + anaerobic pool + anoxic pool + aerobic pool + secondary sedimentation pool + contact oxidation pool + coagulation reaction pool + coagulation sedimentation pool + clean pool. The sludge is filtered by stacked screw pressure.

At full production, the maximum water volume of steam ammonia wastewater is 65m3/h, and low concentration wastewater such as domestic sewage is 30m3/h, that is, biochemical effluent is 95m3/h. The reclaimed water reuse system was put into operation in the later half year of 2019, and the design water volume is 2*100m3/h. Now it cannot meet the stable operation under the condition of the maximum water volume of 137m3/h(95m3/h of biochemical effluent + 30m3/h of circulating cooling effluent + 12m3/h of concentrated water of debrine station) with the design recovery rate of 70%, so it needs to be reformed.

Now it is necessary to carry out zero discharge salting treatment for concentrated brine.

This concentrated salt water and salt zero discharge project is composed of biochemical system transformation unit, reclaimed water reuse system, concentrated water treatment system, and concentrated drying treatment system (including evaporation crystallization).

The treatment capacity of the project is 95m3/h for the biochemical system and 137m3/h for the reclaimed water reuse system (including 95m3/h for biochemical effluent, 30m3/h for circulating sewage, and 12m3/h for the concentrated water of the desalination station). Concentrated water treatment system 40m3/h; Evaporative crystallization unit 8m3/h.