Coking wastewater recycling method

Abstract

The invention discloses a coking wastewater recycling method and belongs to the technical field of environmental protection treatment for metallurgy systems. At present, coking wastewater is treated with biochemical methods, organic and harmful ingredients such as phenol, benzene and the like in the wastewater are decomposed through activated sludge, but the requirement for the harmful ingredients in the wastewater is relatively strict, the activated sludge is poisoned to death and loses the decomposition effect easily due to the higher content of the harmful ingredients, the running cost is higher, and the disposable equipment investment is high. The technical scheme is as follows: directly delivering the coking wastewater to an ingredient plant of a sintering machine through a water pump and a pipeline, adding 7-8% of the coking wastewater to to-be-sintered ingredients to adjust and control the content of moisture so as to meet the ingredient requirement, and burning organic matters in the coking wastewater in the follow-up sintering process to recycle the coking wastewater. The method has the advantages as follows: the investment is low, the treatment capacity is high, the coking wastewater can be treated relatively thoroughly, no secondary wastewater is produced, and the method is the best in existing treatment methods and technologies.

Description

technical field [0001] The invention belongs to the technical field of environmental protection treatment of metallurgical systems, and more specifically relates to a method for recycling coking waste water. Background technique [0002] At present, coking wastewater is treated by biochemical method, and organic harmful components such as phenol and benzene in sewage are decomposed by activated sludge, but the requirements for harmful components in sewage are relatively strict, and the high content will easily cause poisoning and death of activated sludge and lose its decomposition effect , high operating costs, hundreds of thousands a year, one-time equipment investment of millions of yuan, and the sewage discharge is not up to standard, and nearly one million yuan of sewage discharge fees are handed over to the environmental protection department every year. Contents of the invention [0003] For overcoming above-mentioned shortcoming, the purpose of the present inventio...

AI Technical Summary

Problems solved by technology

[0002] At present, coking wastewater is treated by biochemical method, and organic harmful components such as phenol and benzene in sewage are decomposed by activated sludge, but the requirements for harmful components in sewage are relatively strict, and the high content will easily cause poisoning and death of activated sludge and lose its decomposition effect , high operating costs, hundreds of thousands a year, one-time equipment investment of millions of yuan, and the sewage discharge is not up to standard, and nearly one million yuan of sewage discharge fees are handed over to the environmental protection department every year