Problems in the zero-discharge section for coking dew point wastewater

This post was last edited by lyp1979 on 2010-5-24 at 23:14. The wastewater generated in coking plants comes mainly from the moisture in the coal fed into the furnace and the chemical water content during the carbonization process. In the case of compacting coking, the moisture content in the coal fed into the furnace is 10%, while the chemical water content is 2%. This moisture precipitates out during cooling in the initial coolers of the cold drum electrostatic collection unit; this is what is commonly referred to as residual ammonia water. At different temperatures, after being saturated with water vapor, gas contains varying amounts of water vapor. Anti-dew point involves spraying the remaining ammonia solution into gas at a certain temperature; at that temperature, the gas is just capable of holding the amount of ammonia present in the solution. Refer to the physicochemical constants of coking. Thereby ensuring that all the remaining ammonia water is contained in the gas, achieving zero discharge of process wastewater.

The combined water content is 2%. Just made a mistake in writing

This process is suitable for heat-exchange type coke ovens, where the gas contains a high amount of moisture and its temperature is around 80°C; this condition facilitates the extension of the flame and improves the vertical heating in the coke oven. If used in regenerative coke ovens, it remains to be tested in practice.