High-salinity and high organic matter wastewater treatment process

Abstract

The invention discloses a high-salinity and high organic matter wastewater treatment process which comprises the following steps: by means of waste low-temperature exhaust heat in a plant, at a low temperature of 50-70 DEG C, concentrating high-salinity and high organic matter substances in wastewater into solids to be collected in a gas-liquid falling film evaporator through five process steps; and converting the high-salinity and high organic matter water into evaporated vapor water, and condensing and recovering so as to recover the high-salinity and high organic matter wastewater. The process provided by the invention is low in working temperature, does not cause scale formation and can prevent corrosion, and equipment is simple and convenient to maintain, low in investment cost and small in occupied area. The process completely separates water and pollutants in the high-salinity and high organic matter wastewater, no medicaments are added in the treatment process, and residual heat is used in treatment and operation, and little power is just consumed, so that zero emission of the wastewater system is realized, the water source is saved while the environment is protected. The process is suitable for being popularized and applied to wastewater treatment in the industries such as petrochemicals and chemical engineering and the like.

Description

Technical field [0001] The invention relates to the technical field of petrochemical wastewater treatment, in particular to a high-salt and high-organic-matter wastewater treatment process. Background technique [0002] With the rapid development of my country's industry, more and more high-salt and high-organic waste water is produced in the daily production of petroleum, chemical, metallurgical and electric power industries. Due to the chemical oxygen demand (COD) index and salt content of waste water The amount is very high, which seriously pollutes the environment. The discharge of high-salt and organic-containing wastewater has brought salinization of river soil, especially industrial saline wastewater, which contains a large amount of toxic and refractory substances in addition to high-concentration salt itself. Due to the high salt content and high organic matter, these wastewaters cannot be treated by traditional biochemical methods or cannot meet the discharge stand...

AI Technical Summary

Problems solved by technology

Although some results have been achieved in the treatment of saline wastewater, the high operating costs and investment costs and the corrosion and scaling of equipment make it difficult to popularize and apply steam evaporation high-salt and high-organic waste water treatment technology. How to solve high-salt and high organic matter wastewater treatment technology This difficult problem of wastewater treatment is an urgent task to be completed in this technical field

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