Development,Application and Innovation of Coking Phenol Cyanide Waste water Treatment Process
To solve the problem of substandard removal rates of COD and NH3-N in coking wastewater treatment process,an analysis was conducted on the generation,composition,and characteristics of raw water from coking wastewater.Combined with the production process of the coking plant,a preheating treatment was designed for the moisture content of coking coal before entering the furnace.The water used for cooling the coke oven gas was changed from semi open direct cooling to low-temperature closed loop water cooling provided by a refrigeration machine.The benzene removal process was changed to tube furnace heating for rich oil,and the ammonia water treatment adopted reheating and oil removal technology to reduce the amount of wastewater produced.And before biochemical treatment,the wastewater is pretreated using physical and chemical methods.At the end,the original biological phenol removal equipment is transformed into a three-level wastewater regeneration treatment process centered on biological denitrification technology to solve the problem of coking waste water pollution.
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