Self-cleaning sewage treating device

Abstract

The invention relates to an automatic-cleaning waste disposal plant, comprising a cylinder, a grid filter screen and a motor, the mesh channel of the grid filter screen is a flow passage of variable section which means that the channel is becoming narrower along the liquid flowing direction, and the length of the channel is more than or equal to 3mm, the cylinder is provided with a baffle component composed of an upper support, a hollow casing pipe, a lower support and an inclined plate, one end of a rotating shaft is in connection with the outlet shaft of the motor, after passing through the lower support, the casing pipe and the upper support, the rotating shaft is connected with a grid which is in fixed connection with the grid filter screen, the inclined plate is fixed on the upper support and the lower support, which is arranged inside the cylinder of the grid filter screen in an inclined direction, the inner wall of the cylinder is fixed with two external baffles which are arranged in inclined direction corresponding to the two sides of the inclined plate, the baffles divide the grid filter screen and the cylinder into a filtering area and a backflushing area, the cylinder is provided with a water inlet, a water outlet, a water backflushing inlet and a water backflushing outlet, an internal rolling roller and an external rolling roller being arranged inside the cylinder are located in the inner and outer sides of the grid filter screen and is also located in the joining part of the filtering area and the backflushing area. The waste disposal plant of the invention is characterized by the reasonable structure, the low cost and the high waste filtering efficiency.

Description

technical field [0001] The invention relates to a sewage treatment device using sewage to provide energy, in particular to a self-cleaning sewage treatment device, which belongs to the field of sewage treatment. Background technique [0002] The sewage water source heat pump is a heating and air conditioning system that uses sewage as a cold and heat source for energy conversion. Since the sewage heat pump can save coal, gas, oil and other boiler room systems during heating, it can reduce the emission of greenhouse gas CO2 and other air pollutants, and its water source is untreated sewage, so it has the advantages of water saving, energy saving, Environmental protection and other advantages. [0003] Since the water source of the sewage water source heat pump is untreated sewage, and there are a large amount of suspended solids, dirt sediments and microorganisms in the sewage, and the pH of the sewage is relatively high, which will cause corrosion, scaling and blockage of t...

AI Technical Summary

Problems solved by technology

However, the cylindrical grid filter in the self-cleaning device of the above structure is a metal woven mesh. Although the mesh density per unit area of ​​the metal mesh is large, the diameter of the mesh is usually not more than 0.2mm due to the limitation of the process. The mesh flow channel of the filter screen is relatively shallow, and some fine particles and microorganisms in the sewage will enter the pipeline and heat exchanger through the mesh flow channel. It is easy to be corroded, and it will also corrode and deposit dirt on the heat exchanger and circulation pipeline, and accelerate the damage to the metal filter screen and heat exchanger

In addition, there are long strips of soft algae, hair and plastic fibers in the sewage. On the one hand, these long strips of suspended matter are easy to cause blockage of the mesh; On the mesh, even if the metal mesh is continuously recoiled, these strips are not easy to be washed off, which will accelerate the blockage of the mesh flow channel and affect the stability of the entire heat exchange system

In addition, the clapboard installed in the shell and the clapboard installed in the cylindrical grille filter are vertically arranged. When the sewage enters the water supply area in the cylinder from the water supply area in the shell through the cylindrical grille screen, the sewage The effect of uniform water distribution cannot be achieved, resulting in a part of the cylindrical grille filter being filtered intensively, while the other part does not pass through the sewage, which affects the filtering effect

Therefore, the current sewage heat source system uses various new materials and surface treatment technologies for various equipment in the heat exchange system to solve the problems of corrosion, blockage and scaling, and greatly increases the manufacturing and operating costs of the sewage heat source pump system. So that the sewage heat source pump cannot be widely used

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