Water-oil ammonia sulfur residue separation system and method for phenol ammonia wastewater treatment

Abstract

The invention provides a water-oil ammonia-sulfur residue separation system and method for phenol-ammonia wastewater treatment, the phenol-ammonia wastewater treatment system comprises a mother liquor separation tank, a gaseous substance collection unit, a water-oil ammonia-sulfur separation unit, a water-oil separation unit and an ammonia-sulfur treatment unit, phenol-ammonia wastewater flows in the mother liquor separation tank; the gaseous substance collection unit is communicated with the mother liquor separation tank, and the water-oil ammonia-sulfur separation unit is communicated with the gaseous substance collection unit, the water-oil separation unit and the ammonia-sulfur treatment unit. The phenol-ammonia wastewater treatment method is based on the phenol-ammonia wastewater treatment system. Based on different physical characteristics of water, oil, ammonia, sulfur and other substances in wastewater, phenol-ammonia wastewater is gasified and separated at high temperature by heating the mother liquor separation tank, gaseous substances are recovered by the gaseous substance collection unit, water-oil and ammonia-sulfur are separated by the water-oil ammonia-sulfur separation unit, and light oil is recovered by the water-oil separation unit after water-oil enters the water-oil separation unit; ammonia and sulfur enter the power plant boiler to participate in combustion of the power plant boiler, and finally thorough quality-divided recovery of water, oil, ammonia, sulfur and slag is achieved.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a system and method for separating water, oil, ammonia, and sulfur residues for phenol ammonia wastewater treatment. Background technique [0002] The coal pyrolysis process produces a large amount of phenolic ammonia wastewater. The phenolic ammonia wastewater has the characteristics of complex composition, high concentration of pollutants, high chroma, high toxicity, and stable properties. It is one of the difficult industrial wastewaters to treat. [0003] The above-mentioned phenol ammonia wastewater contains oil up to 3500mg / L, volatile phenol up to 5000mg / L, and ammonia nitrogen content up to 5500mg / L. Compared with coking wastewater, because the types of pollutants in phenolic ammonia wastewater are similar but their concentration is nearly 10 times higher than that of coking wastewater, the treatment cost of phenolic ammonia wastewater is extremely high, and there is c...

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Problems solved by technology

Compared with coking wastewater, because the types of pollutants in phenolic ammonia wastewater are similar but their concentration is nearly 10 times higher than that of coking wastewater, the treatment cost of phenolic ammonia wastewater is extremely high, and there is currently no mature wastewater treatment process

[0004] At the same time, when pulverized coal, seed coal, and lump coal are comprehensively pyrolyzed, coke powder is easily brought into the gas during the pyrolysis process, and the coke residue is brought into the water-oil separation unit during the process of gas passing through the bridge pipe and the ammonia water washing process of the gas collection tank, causing water Coke deposits in the oil separation unit increase the cleaning frequency of the water-oil separation unit and affect the tar yield and quality at the same time

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