An integrated process system and method for petrochemical industrial wastewater treatment

Abstract

The invention provides a petroleum chemical industrial wastewater treatment integrated process system and method. The system comprises an on-line monitoring and analyzing system, an intelligent feedback control system and a wastewater treatment system, wherein the on-line monitoring and analyzing system is used for monitoring and analyzing the composition of water quality of petroleum chemical industrial wastewater and the composition of water quality of effluent at all treatment links and transferring monitoring and analyzing data to the intelligent feedback control system; the intelligent feedback control system is used for outputting a control signal to the wastewater treatment system after the monitoring and analyzing data are processed; the wastewater treatment system comprises a pre-treatment module, an oil removal module, a biochemistry module, a sludge treatment module and a depth treatment module; the pre-treatment module, the oil removal module, the biochemistry module, the sludge treatment module and the depth treatment module are used for treating the petroleum chemical industrial wastewater according to an instruction of the control signal output by the intelligent feedback control system. According to the method, treated water with stable and qualified indexes of SS, COD, chromaticity and the like is obtained by seven steps.

Description

Technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and specifically relates to an integrated process system and method for wastewater treatment in the petrochemical industry. Background technique [0002] Petrochemical industry is an industry that processes petroleum and natural gas as raw materials into various chemical products. Petrochemical wastewater is the wastewater discharged from the production process of petrochemical enterprises. The sources of wastewater are distributed in various production facilities, crude oil tank farms, water supply and drainage workshops, etc. Petrochemical wastewater contains a wide variety of substances, complex composition, and high organic content. COD is about 600~1200mg / L and BOD is 200~1000mg / L; due to the variety of catalysts used in the production process, the wastewater contains many heavy metals, and It is very toxic, has the characteristics of inhibiting biodegradation, and has a ...

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Problems solved by technology

[0004] ①The water quality components are complex and there are many by-products, and the reaction raw materials are mostly solvent substances or ring-structured compounds, etc.;

[0005] ② High concentration of pollutants in wastewater;

[0006] ③There are many toxic and harmful substances, such as halogen compounds, nitro compounds, sulfides, some surfactants or dispersants, etc.;

[0007] ④ Low BOD / COD value and poor biodegradability;

[0008] ⑤ High chroma of wastewater

At home and abroad, we attach great importance to this, and usually use chemical or physical methods to treat it, but not all petrochemical wastewater is difficult to degrade, only a small number of special processes or products produce wastewater that is difficult to treat or biochemically. The physical method has the problem of high operating cost and poor effect

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