An ozone reaction tank for sewage treatment system

Abstract

An ozone reaction tank for a sewage treatment system, characterized in that it includes a reaction tank body and a cover plate covering the top of the reaction tank body, wherein the reaction tank body is separated by a partition to form a reaction zone, a slow flow channel, and a sedimentation zone in sequence The upstream of the reaction zone is provided with a water inlet pipe and an air inlet pipe, and the downstream of the sedimentation area is provided with an outlet pipe and an exhaust pipe, the inlet pipe is connected to the ozone generator, and the exhaust pipe is connected to the ozone tail gas destroyer, and a blocking assembly is arranged in the reaction zone. The barrier assembly includes a fixed frame fixed to the pool wall of the reaction pool body, and a lower baffle unit and an upper baffle unit fixed to the fixed frame. Arranged in the height direction, the present invention has the advantage of making the utilization of ozone more fully.

Description

technical field [0001] The invention relates to the technical field of ozone contact reaction treatment of sewage and waste water, in particular to an ozone reaction pool used in a sewage treatment system. Background technique [0002] With the development of industry, the composition of industrial wastewater is becoming more and more complex and its biodegradability is getting worse. Most of the industrial wastewater needs to undergo pre-oxidation treatment or three-stage advanced treatment to achieve water pollution control and wastewater recycling. As one of the effective wastewater pre-oxidation and advanced treatment methods, ozone has a series of advantages such as strong oxidation ability, fast reaction speed, convenient use, and no secondary pollution after the reaction, so it has been valued by people. [0003] The most common structure of the existing reaction tank for ozone contact is that the tank is provided with a baffle for prolonging the reaction time between...

AI Technical Summary

Problems solved by technology

[0003] The most common structure of the existing reaction tank for ozone contact is that the tank is provided with a baffle for prolonging the reaction time between the ozone gas and the water body, such as the ozone contact designed by the design method used in the patent with the publication number CN104609534B The pool is one of the most common basic pool types at present. However, because the ozone gas exists in the water body for a short time and the air buoyancy of the ozone gas makes it easy to overflow out of the water body, the vertical direction of the pool body is equipped with baffles. The main function is to prolong the flow time of the water body. The aeration device is installed at the bottom of the pool when the water body flows through the baffles and the water body descends. In essence, it is a multi-stage aeration for the water body, which is to compensate for the contact time between ozone and the water body. Insufficient measures to increase the amount, and because the open opening of the pool body will make the ozone that is not dissolved in the water body overflow quickly, resulting in a waste of ozone utilization

[0004] On the basis of the above-mentioned type of ozone contact tank, in order to improve the dissolution rate of ozone and sewage and the utilization efficiency of ozone, a tower type ozone contact tank has been formed, such as the patent of CN203530002U (plate type) and CN105036294B (packing type). As the conventional representative type of this type, the tower-type ozone contact tank utilizes the upward overflow of ozone itself relative to the water body and prolongs the contact time of gas and liquid through partitions or fillers. However, although the tower-type ozone contact tank has improved Ozone Utilization Efficiency But this process has very obvious following disadvantages, one is that due to the limited volume of the tower structure, the amount of treated water is not as good as that of the ozone contact pool set on the flat ground, and the other is that it is not suitable for the use of the packing process. The growth and iterative formation of microorganisms will make it difficult to clean the plugging of the packing layer. The third is that for the tower structure with horizontal partitions, the gas entering from the bottom does not completely follow the designed gas flow direction and contact with the water body. Too many air bubbles will accumulate on several partitions at the bottom, and the air bubbles that cannot overflow will form a layer of air film at the bottom of the board and be isolated from the water body. The ozone that enters the air film is difficult to dissolve in the air until it decomposes into oxygen. The water body reacts, which is undoubtedly a waste of the use of ozone. Fourth, the arrangement of the water body's upper inflow and lower outflow and gas inflow and upper outflow requires strict control of air pressure and hydraulic pressure, otherwise it is easy to form liquid flooding and reduce mass transfer efficiency.

Images