Semi-coke high-concentration organic wastewater resource treatment system and method

Abstract

The invention relates to a semi-coke high-concentration organic wastewater resource treatment system and method. The system comprises a pretreatment unit, an ammonia evaporation and phenol extractiontreatment unit and a fine filtration and adsorption treatment unit which are connected in sequence, wherein the pretreatment unit completes pretreatment on semi-coke high-concentration organic wastewater by heavy oil separation, multiphase flow separation, flocculation sedimentation, double medium filtration and high-precision coalescence oil-water separation, so that coal tar and mechanical impurities in the pretreated wastewater are treated to qualified indicators; the ammonia evaporation and phenol extraction treatment unit implements ammonia removal and phenol extraction on the pretreatedwastewater by using hot steam carrier heat transfer and countercurrent extraction for separating phenol oil and water; and the fine filtration and adsorption treatment unit performs fine filtration and deep phenol removal on the wastewater after the ammonia removal and phenol extraction. The system and the method can effectively treat the semi-coke wastewater, recover ammonia nitrogen, phenol andoil as byproducts from the semi-coke wastewater, greatly reduce the operating cost of an environmental protection device, and are particularly effective for later industrial application.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a system and method for recycling organic waste water with high concentration of blue charcoal. Background technique [0002] Semi-coke wastewater, also known as semi-coke wastewater, refers to a kind of industrial wastewater formed in the process of low-metamorphism coal dry distillation (about 600-800°C), gas purification, and semi-coke steam quenching. The wastewater has "four high "One less" (high COD, high oil, high ammonia nitrogen, high phenol, less waste water production), which contains a large number of complex components that are difficult to degrade and highly toxic substances, such as ammonia, phenol, petroleum and other substances. During the coke quenching process, most of these pollutants are attached to the semi-coke, which seriously affects the quality of the semi-coke as a clean fuel. [0003] The phenol and petroleum substances contained i...

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Problems solved by technology

[0006] At present, there is no mature semi-coke wastewater treatment process at home and abroad, and most semi-coke enterprises directly use it as coke quenching water after simple degreasing, which seriously affects the quality of semi-coke.

Very few have treatment measures, and the treatment methods mainly refer to the coking wastewater treatment process with similar water quality, but the water quality of semi-coke wastewater is 10 times worse than that of coking wastewater, and the biodegradability of wastewater is even worse. At the same time, various treatment processes are currently being promoted and applied There are some serious problems, such as high primary investment cost, high operating cost, harsh reaction conditions, poisoning, fouling or scaling of extractant, blockage of ammonia distillation pipeline, unstable operation, etc., which are urgently needed in the field of semi-coke wastewater treatment. solved problem

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