Sludge ozonation reaction tank

Abstract

The invention relates to a sludge ozonation reaction tank. The sludge ozonation reaction tank comprises a tank body, an upper cover and a stirring device. The stirring device comprises stirring disks, a rotating shaft and a driving mechanism. An ozone inlet channel is disposed in the rotating shaft along the axial direction. Each stirring disk comprises an upper disk and a lower disk which are fixed to each other. The upper disks and the lower disks are provided with ozone outlet channels and aeration ports. Each aeration port is provided with an aeration head. Each aeration head comprises a sleeve, a rigid net, an elastic soft membrane and an annular hold hoop. The end with a smaller cross section of each sleeve protrudes out of the outer surface of the corresponding upper disk or the outer surface of the corresponding lower disk. Each rigid net is disposed at the end surface of the protruding end of the corresponding sleeve. Each elastic soft membrane covers the corresponding rigid net and is fixed to the protruding end of the corresponding sleeve through the corresponding annular hold hoop. Each elastic soft membrane is provided with at least one cross kerf. The outer surfaces of the elastic soft membranes are fully exposed in the tank body. Aeration is performed under a stirring state so that sludge and the ozone are fully contacted. The aeration heads can suit stirring conditions well and achieve better aeration and backflow prevention functions.

Description

technical field [0001] The invention relates to a sludge ozonation reaction tank. Background technique [0002] The national standard "Sludge Disposal of Municipal Sewage Treatment Plants for Mixed Landfill Mud" (GB / T 23485-2009) stipulates that when sludge and domestic waste are mixed for landfill, the moisture content of the sludge should be less than 60%. The existing sludge dehydration treatment device is generally composed of a sludge delivery pump and a box-type diaphragm filter press. The sludge with a water content of 99% produced in a sewage treatment plant is directly pumped into the box-type diaphragm filter press for pressure filtration and dehydration. The device can basically meet the requirements of the above standards. However, this device directly sends the sludge with a moisture content of 99% to the chamber-type diaphragm filter press without any pre-dehydration, and the dehydration capacity is large, so that the filter press maintains a huge working load...

AI Technical Summary

Problems solved by technology

[0004] Existing sludge ozonation devices, such as the name "airlift type internal and external double cycle ozone sludge contact reaction device", the publication number is "102583936" Chinese invention patent disclosed, the ozone reaction tank is designed as a common spray tower The structure is to drop the sludge from a high place and use the diversion baffle with small holes to turn the sludge into mist and sprinkle it down. The lower part uses the aeration plate to spray ozone to make the ozone react with the sludge. At the same time, the lower part is equipped with The return pump pumps the sludge back to the top and falls again to realize the repeated contact between the sludge and the ozone in order to achieve the effect. However, due to this design, the ozone cannot fill the entire reaction device, so that the contact between the ozone and the sludge is insufficient, and the overall ozone oxidation effect not good

Another name is "Ozonation Sludge Reduction System", the Chinese invention patent with the publication number "102910794", in order to improve the utilization rate of ozone, a two-stage ozone reaction tank is set up, although the contact time between ozone and sludge , but because the sludge in the reaction tank is basically in a static state, the contact between ozone and sludge is not sufficient, resulting in a poor overall sludge reduction effect

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