VOC volatilization prevention device for sewage treatment pools and tanks

Abstract

The invention provides a VOC volatilization prevention device for sewage treatment pools and tanks. The device comprises a fixed cover plate, a movable cover plate and a follow-up oil collecting assembly, wherein one side of the movable cover plate is connected with the fixed cover plate, the follow-up oil collecting assembly is installed below the fixed cover plate, the connecting side of the fixed cover plate and the connecting side of the movable cover plate are matched in a hinged mode, the movable cover plate can rotate around a hinged shaft in a one-way mode, the fixed cover plate and the movable cover plate are both of a hollow floating block structure and are matched to form a complete square sealing restraining cover, the bottom surface of the square sealing restraining cover is in hydraulic contact with a sewage treatment pool or tank, and the square sealing restraining cover is attached to the surface of liquid based on the buoyancy of the square sealing restraining cover. By means of the structure, oxygen isolation sealing can be better achieved, the oil collecting function is added, and sewage cleaning of a sewage pool and tank can be achieved more conveniently and rapidly.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a VOCs volatilization prevention device for sewage treatment pools and tanks with the function of collecting oil slicks and high sealing reliability. Background technique [0002] At present, sewage ponds, tanks and sewage treatment facilities are basically open-air design, so the sewage is in direct contact with the atmospheric environment. During the sewage treatment process, a large amount of volatile gases are released into the air, including the sewage itself contains a large amount of volatile Sulfur and nitrogen compounds produced by organic matter and biochemical reactions have become one of the main factors of environmental degradation. In recent years, the country has paid more attention to environmental protection, and has issued many environmental protection regulations. In the "GB31570-2015 Petroleum Refining Industry Pollutant Discharge Standard", the requirements fo...

AI Technical Summary

Problems solved by technology

However, the current cover plate is relatively simple in structure and poor in sealing performance, and the problem of VOCs volatilization cannot be completely solved in practice. Specifically, the current cover plate mainly has two structures, one is the middle soft material plus edge sealing Capsules, the other is the middle hard floating disk plus edge capsules, both of the above two structures have deficiencies

To be more specific, a gap is easily formed between the cover plate and the liquid surface, thereby causing the volatilization of VOCs, while the hardware floating plate has a single-layer structure, and the outer capsule needs to be higher than the floating plate, which will cause a gap between the capsule and the tank wall. The triangular gap area is also the main place where VOCs volatilize. In addition, the floating plate is mostly a single-layer structure, which has certain shortcomings in terms of sealing

[0005] In addition to the above deficiencies, the sewage tank itself has a special-shaped structure, which is quite different from the round tank, and the cleaning cycle is short. Most of the existing cover plates have an integrated structure. In the actual application process, there are still places that are not convenient for actual maintenance. More specifically, due to the deposition of dirt in the sewage pool, it is necessary to clean the pool, which is in contradiction with the sealing of the cover plate. Therefore, the cover plate needs to be lifted every time for maintenance, and the workload is large. , will also damage the edge sealing of the cover to a certain extent

[0006] Finally, the existing cover plates of this type do not have the function of collecting sewage slick oil, and there is a lack of functionality

Images