Ammonia distillation and dephenolization coupling device for semi-coke production wastewater and process thereof

Abstract

The invention relates to the technical field of semi-coke wastewater treatment, in particular to an ammonia distillation and dephenolization coupling device for semi-coke production wastewater. The device comprises a heating mechanism, a spray tower is erected above the heating mechanism, a heat exchange mechanism is installed on the side wall of the spray tower, a preheating mechanism is arrangedon the side, away from the heat exchange mechanism, of the spray tower, and the preheating mechanism is connected with the heating mechanism; and an air conveying mechanism is mounted on the heatingmechanism. Through the arranged heating mechanism, water vapor containing phenol can be combusted, then the combusted phenol is decomposed into water and carbon dioxide, formed water vapor performs heat exchange in the heat exchange mechanism, the heating mechanism can further heat phenol-containing liquid entering a heating chamber, the phenol-containing liquid is vaporized and then conveyed intoa combustion chamber through the air conveying mechanism to be combusted, water in a water guide pipe can be preheated through the arranged preheating mechanism, and a large amount of water can be saved.

Description

technical field [0001] The invention relates to the technical field of semi-coke wastewater treatment, in particular to a coupling device for distilling ammonia and removing phenols from wastewater used in semi-coke production and a process thereof. Background technique [0002] Semi-coke wastewater is wastewater produced during the recovery process of coal-based coking products. Its composition is complex and changeable, and it belongs to difficult-to-treat industrial wastewater. The treatment methods of semi-coke wastewater mainly include biological methods, chemical methods and physical and chemical methods. Develop a new technology of high-efficiency and low-cost semi-carbon wastewater treatment, and conduct experiments on the combination of ammonia distillation-dephenol-SBR treatment process. The semi-coke wastewater of a factory was treated, and the adaptation of microorganisms and the treatment effect on wastewater were investigated. The results showed that the ammoni...

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Problems solved by technology

[0004] Aiming at the problems in the prior art, the present invention provides a coupling device for distilling ammonia and removing phenols from wastewater used in semi-coke production and its process, which solves the problem of distilling ammonia and then distilling phenol in two steps in the prior art, with complicated procedures and high temperature heating. Phenol-containing sewage, the phenol in the sewage evaporates and overflows with the steam, and then passes through the lye to absorb it into phenol sodium salt, so as to achieve the purpose of dephenolization. This method is simple to operate, less investment, but consumes more steam. There is a lot of waste heat, great environmental pollution, and the amount of water consumed cannot be reused, and the dephenolization efficiency is not ideal, and generally the goal of complete dephenolization cannot be achieved.

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