Method for recovering and treating coking phenol-cyanogen wastewater by adopting Isa furnace

Abstract

The invention belongs to the field of coking phenol-cyanogen wastewater treatment and particularly relates to a method for recovering and treating coking phenol-cyanogen wastewater by adopting an Isa furnace. In a material granulation step of a mineral smelting process of the Isa furnace, the phenol-cyanogen wastewater is used for performing water supplement on materials and enters the Isa furnace together with the materials to be smelted, phenol water is completely decomposed into water and CO2 by utilizing high temperature greater than 1,200 DEG C, and heat of pollutants such as phenol, cyanogen and the like is used for smelting, so that wastes are turned into wealth, the health of workers is maintained, and the production safety is improved. The method is reasonable, relatively low in cost and easy to popularize.

Description

technical field [0001] The invention belongs to the field of coking phenol-cyanide wastewater treatment, and in particular relates to a method for recovering and treating coking phenol-cyanide wastewater by adopting an Isa furnace. Background technique [0002] During the coking production process, a large amount of waste water containing toxic and harmful substances such as phenol, cyanide, oil, ammonia nitrogen, etc. will be discharged. The phenol cyanide wastewater mainly comes from the process of coking, gas purification and refining of chemical products, and the main source is the residual ammonia produced in the ammonia distillation process. The remaining ammonia water is mainly composed of three parts: the wet water on the surface of the furnace coal, the combined water produced by the dry distillation of the furnace coal, and the oily process wastewater added to the suction gas pipeline and the gas collector circulating oxygen water pump. The remaining ammonia water...

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Problems solved by technology

Another key disadvantage of using the incineration method to treat phenolic sewage is that once the operation is careless, the furnace temperature will drop, which will often cause incomplete combustion and easily cause secondary pollution.

However, due to the high concentration of volatile phenol and cyanide in the phenolic sewage, it will seriously pollute the boiler operators and the environment.

Moreover, the load of small boilers is generally unstable. When the boiler load is low, when the furnace temperature is low and cannot reach the decomposition temperature of phenol, it will drift with the flue gas, causing secondary pollution, and the pollution area is larger and more difficult to deal with.

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