Municipal sewage desanding device and desanding method

A technology for urban sewage and sewage, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems affecting the normal operation of the digester and biogas production, and the high cost of sewage treatment equipment loss , Sand removal effect cannot be guaranteed, etc., to achieve the effect of simple structure, high degree of automation, and labor reduction

CN111186926AActive Publication Date: 2020-05-22YIKANG TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-05-22

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Abstract

The invention discloses a municipal sewage desanding device and a desanding method. The device comprises a water collecting unit, a sand removing unit, a water storing and returning unit and a sand collecting unit, wherein the water collecting unit internally comprises the sand removing unit which is alternately connected in a circulating static and dynamic manner; a water inlet is formed in the upper left portion of the water collecting unit. A spiral stirrer is arranged in the sand removing unit; the lower part of the water collecting unit is connected with the water storing and returning unit through a water outlet pipe; the lower part of the sand removing unit is connected with the water storing and returning unit through a water return pipe; the lower portion of the sand removing unitis connected with the sand collecting unit through a sand conveying pipe. A one-way water valve is arranged in the water storing and returning unit; the lower part of the water storing and returningunit is provided with a water outlet, and the right side wall of the san collecting unit is provided with a sand outlet. The device is high in automation degree, a large amount of labor work is reduced and avoided, the labor cost is reduced, the precision is high, the sewage treatment efficiency is improved, and the service lifetime of subsequent water treatment equipment is prolonged.
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Description

technical field

[0001] The invention relates to the technical field of sand removal for sewage, in particular to an urban sewage sand removal device and a sand discharge method. Background technique

[0002] The amount of sand settling in general urban sewage can be calculated as 1 million m3 of sewage sand settling 30m3, with a water content of 60% and a density of 1500kg / m3, but some sewage treatment plant inlet water samples are often higher than the above values, or even 2-3 times the designed sand content. The increase of the sand content in the sewage will affect the various processes in the operation, which is very unfavorable to the daily operation of the sewage treatment system.

[0003] Inlet pump house forebay is the catchment area of ​​the pump house and also becomes a grit chamber for coarse particles in the sewage. In the water inlet channel, there is more serious sand accumulation in the diffusion and dead corners, which makes the water intake of the pump bl...

Examples

Embodiment 1

[0031] see Figure 1-3, in an embodiment of the present invention, an urban sewage sand removal device includes a water collection unit 1, a sand removal unit 2, a water storage and return unit 3, and a sand collection unit 4. The water collection unit 1 contains a circulation The desanding unit 2 is statically and dynamically connected alternately. The desanding unit 2 filters the mud and sand in the sewage. The upper left of the water collection unit 1 is provided with a water inlet 9. The sewage outlet 9 is used for the entry of sewage. The desanding unit 2 The inside of the sand unit 2 is provided with a spiral agitator 10, which is used for agitation of sewage to help sand removal. The lower part of the water collection unit 1 is connected with the water storage and return unit 3 through the outlet pipe 5, and the outlet pipe 5 is used for the transmission of sewage The bottom of the desanding unit 2 is connected with the water storage and return unit 3 through the return...

Embodiment 2

[0038] Water outlets 12 are provided below the primary static desanding water storage unit 301 , primary cyclone desanding water storage unit 302 , secondary static desanding water storage unit 303 , and secondary cyclone desanding water storage unit 304 , when the value of the mud and sand induction plate 14 reaches the standard, the corresponding water outlet 12 is opened, and the sewage enters the next processing unit.

[0039] After the mud and sand transported by the sand removal unit 2 through the sand conveying pipe 7 reaches the mud and sand induction plate 14, when the mud and sand induction plate 14 senses that the weight of the mud and sand is higher than the standard value, the sewage in the water storage and return unit 3, Through the return pipe 6, under the action of the pressure pump, it is reversely transported to the next stage of desanding treatment unit.

[0040] When the extruding plate 13 completes the desanding treatment of a section of sewage, the mud s...