A treatment and discharge system for nitrogen-containing coating wastewater

Abstract

The invention discloses a treatment and discharge system for nitrogen-containing coating wastewater, particularly an energy-saving wastewater treatment system diluting coating wastewater with domesticwastewater, provided with a precipitation pool with a high tower structure, enabling self-flowing by utilizing water level difference, recovering effective microbe sludge by combining an inner circulation recovery system, capable of gathering and collecting precipitates and collecting other waste materials of wastewater treatment and a production line. The disclosed system is characterized in that a water storage pool is provided with two liquid accommodating zones respectively provided with feeding pipes and discharging pipes; the feeding pipes of the water storage pool are provided with anintercepting grid; the discharging pipes of the water storage pool are communicated with the precipitation pool through a high-pressure pump; the precipitation pool adopts a down-in and up-out manner;the pool wall of the bottom periphery of the precipitation pool is provided with a water collection groove for water guiding and sludge discharging; the bottom of the precipitation pool is provided with a plurality of trapezoid sludge hoppers and is communicated with the water storage pool through a sludge discharging pipe provided with a straightway valve.

Description

technical field [0001] The invention relates to a nitrogen-containing treatment and discharge system for painting wastewater, which relates to a structure for blowing and cleaning the molded jacket remaining on the core-pulling structure during mold production, and belongs to the field of sewage treatment. In particular, it involves a kind of domestic sewage to dilute the coating sewage, set up a sedimentation tank with a high tower structure, use the water level difference to carry out self-flow, and combine the internal recycling system to recycle the effective sludge, and can collect the sediment in a centralized manner. An energy-saving sewage treatment system for sewage treatment and collection of other waste from the production line. Background technique [0002] At present, coating the product can improve the anti-oxidation and corrosion resistance of the product surface, and isolate the product from external water and air through coating. However, during the coating ...

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Problems solved by technology

[0002] At present, coating the product can improve the anti-oxidation and corrosion resistance of the product surface, and isolate the product from external water and air through coating. However, during the coating process, a large amount of wastewater will be generated. The coating wastewater contains Pollutants include surfactants, oils, pigments, organic solvents, heavy metals and phosphates, etc. Therefore, the coating sewage needs to be treated before it can be discharged. If it is discharged directly, it will cause problems such as water quality deterioration and environmental pollution, especially in some industrial parks. Automobile manufacturing plants, such as more than 90% of the outer surfaces of automobiles and motorcycles, need to be painted. The painting of automobile bodies and parts is one of the links that produce the most types of pollutants and the largest amount of wastewater discharge in the production of the automobile industry. The amount of waste water discharged from the installation is large, and the amount that needs to be treated frequently is also large. At the same time, with the improvement of the environment in our country, more and more companies have begun to pay attention to the treatment of painting waste water. The existing treatment process of automobile painting waste water is relatively complicated. , the structure of the automobile painting wastewater treatment system is relatively complex, and it is not convenient for the treatment of automobile painting wastewater. Driven by energy, and the coating wastewater is directly treated, the processing load of the equipment increases, and the treatment effect decreases

[0003] Publication No. 201520253950.5 discloses a coating sewage treatment equipment, which adopts a combination of physical and chemical means, sets up multi-layer filter screens for physical filtration, and uses flocculants and defoamers to treat sewage, and in the circulation pool Activated carbon for adsorption and filtration is installed in the utility model. Although the structure of this utility model is simple and the cost is low, the treatment of organic matter is not thorough enough, and it can only meet the standard of circulating water, but not the standard of discharge. There is only one storage tank above the sedimentation tank and the secondary sedimentation tank. The reagents need to be manually prepared and placed in the storage tank. The workload is large, the daily processing volume is small, and it is not possible to use the environment with a large processing capacity.

Publication No. CN107265787A discloses an automobile painting wastewater treatment process and an automobile painting wastewater treatment system, including a pretreatment step, a coagulation reaction step, a precipitation removal step, a hydrolysis acidification step and a molecular decomposition step. There are few internal circulation systems in the system, Some beneficial factors have not been collected and reused, and the collection action for sedimentation is poor, the sewage flow mode is single, and the filtration, reaction time and effect are poor

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