CN102228759A - Sewage filter - Google Patents

Abstract

A comprehensive shallow pool theory, dynamic coagulation, accelerated flocculation principle and inclined plate technology, strong sedimentation capacity, good hydraulic conditions, high sedimentation efficiency, stable sedimentation effect, increase the surface load of the vertical flow sedimentation tank, and effectively solve the problem of traditional inclined plate (Pipe) Sedimentation technology is easy to clog the problem, and the sewage filter is easy to maintain. The sewage filter utilizes equidistantly arranged filter covers and numerous through-hole structures to divide the moving raw water into fine sections to ensure uniform distribution of the water flow. A stable vortex is generated at the rear edge of the filter housing plate hole. Under the entrainment effect of the vortex, the non-fluid substances in the raw water gather to the center of the vortex, and continuously contact, collide, and bond in the vortex core, and flocculation reactions occur. The flocs are repeatedly extruded by the rotating fluid, and their mass and size become larger and larger, and finally settle with large-mass particles. The thin mud layer accumulated on the surface slides down along the slope of the cover body by gravity and sinks into the mud collecting bucket. Thereby, the purpose of removing suspended matter in the raw water and cleaning the water body is achieved. The sewage filter can rotate around the shaft axis. By rotating left and right quickly and repeatedly, a strong turbulent shear flow is formed, which can cause high-speed scouring of the inclined plate, and it is very convenient to remove possible deposits and blockages.

Description

sewage filter

technical field

The invention relates to a sewage filter capable of accelerating the sedimentation process of sewage treatment, clarifying water bodies and improving the sewage treatment effect.

Background technique

The vertical flow sedimentation tank is an important sewage treatment structure, which has many advantages such as small footprint, convenient sludge discharge, contact flocculation and sludge suspension layer interception, and is very suitable for small and medium-sized sewage treatment systems. However, its depth is large, and its adaptability to water impact load and water temperature change is not strong. There are often phenomena such as water distribution and water collection, and the sedimentation effect is unstable; the pool diameter should not be too large.

The advantages of inclined plate and inclined tube sedimentation tanks are large sedimentation area, high hydraulic load, high efficiency, which is more than double that of other sedimentation tanks, less land occupation, saving civil engineering investment, stable operation, safety and reliability, but inclined plates and The inclined tube is very easy to block, which affects the sedimentation, makes maintenance and management difficult, and greatly limits its scope of use.

Contents of the invention

In order to solve the defects that the depth of the vertical flow sedimentation tank is too large, the adaptability to the impact load of water volume and the change of water temperature is not strong, and the traditional inclined plate (pipe) is prone to sludge adhesion and clogging, which affects the sedimentation effect, the sewage filter integrates the shallow Pool theory, dynamic coagulation, accelerated flocculation principle and inclined plate technology, use equidistantly arranged filter covers and numerous through-hole structures to divide and divide the moving raw water to ensure uniform distribution of water flow; at the same time, use fluid to flow behind obstacles Or the characteristics of the high-speed rotating vortex formed in the depression make the raw water generate a stable vortex at the rear edge of the through hole of the filter cover. Under the entrainment effect of the vortex, the non-fluid substances in the raw water gather to the center of the vortex, and continuously contact, collide, and bond in the vortex core, and flocculation reactions occur. The flocs are repeatedly extruded by the rotating fluid, and their mass and size become larger and larger, and finally settle with large-mass particles. The thin mud layer accumulated on the surface slides down along the slope of the cover body by gravity and sinks into the mud collecting bucket. Thereby, the purpose of removing suspended matter in raw water and cleaning the water body is achieved.

The structure of multi-layer equidistant periodic arrangement makes the flocculation reaction and shallow pool sedimentation process repeat cycle, the suspended matter is continuously removed, and the purification efficiency is greatly improved.

The sewage filter can rotate around the shaft axis. By rotating left and right quickly and repeatedly, a strong turbulent shear flow is formed, which can cause high-speed scouring of the filter cover body, and it is very convenient to remove possible deposits and blockages.

The technical solution adopted by the present invention to solve its technical problems:

Several of the same shape and structure, the hollow filter covers of the cover body are arranged in parallel in the axial direction, and the middle is connected and fixed by a rotating shaft; the number of filter covers is not less than 1, and there is a distance between adjacent filter covers; there are regular arrangements on the cover surface Through holes; the through holes are evenly arranged in rows in the radial direction and distributed equidistantly along the circumferential direction.

The shape of the filter cover is a truncated cone, or a ball table, or a spherical crown.

The filter cover body is hollow without a lower bottom surface, and the upper bottom surface of the circular truncated and ball table shaped filter covers is a hub structure.

The rotating shaft is a hollow shaft structure.

The shape of the through hole of the filter cover is triangle, rhombus, rectangle, butterfly, circle, ellipse, quadrilateral, pentagon, hexagon, polygon or symmetrical curve figure.

The through holes of the adjacent filter covers are alternately arranged with the cover plates.

The filter cover is composed of a number of components with hubs and fan-shaped covers that are staggered and combined.

The beneficial effect of the present invention is that the flocculation reaction is sufficient, the SS of the effluent suspended matter is greatly reduced; the sedimentation area per unit area is increased, the hydraulic condition is good, the sedimentation efficiency is high, and the sedimentation effect is stable; the pool depth can be effectively reduced; the surface load of the pool body can be increased ; Reduce floor space; no mud, no clogging, easy to remove silt, completely overcome the problem of easy clogging of traditional inclined plate (pipe) sedimentation technology.

Description of drawings

The invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is an axial sectional view of the application of the present invention in a vertical flow sedimentation tank.

Fig. 2 is a perspective view of the present invention with a 6-layer filter cover structure.

Fig. 3 is an axial sectional view of the present invention with a 6-layer filter housing structure.

Fig. 4 is a perspective view of the present invention with a one-layer filter housing structure.

Fig. 5 is a perspective view of a separate filter housing.

Fig. 6 is an axial sectional view of a separate filter housing.

Fig. 7 is a perspective view of an assembly composed of a hub and a 140° fan-shaped cover.

Fig. 8 is a perspective view of a filter housing composed of three components shown in Fig. 7 .

Fig. 9 is a perspective view of a filter housing and a rotating shaft formed by combining three components shown in Fig. 7 .

In the figure: 1. Pool body 2. Sewage 3. Central water inlet pipe 4. Reflector plate 5. Water outlet hole 6. Water outlet weir 7. Water outlet tank 8. Settling dirt 9. Mud storage bucket 10. Mud discharge pipe 11. Filter cover 12. Shaft 13. Through hole 14. Substrate 15. Hub 16. Fan-shaped cover

Detailed ways

In the embodiment shown in Fig. 1, the present invention is sleeved outside the central sewage inlet pipe and supported by a bracket. Sewage enters the pool from top to bottom through the water inlet pipe located in the center of the pool. The umbrella-shaped baffle under the tube makes the waste water spread evenly horizontally. Limited by the space of the cover, the raw water gathers under the cover and flows upward through the evenly distributed through holes. Due to the orifice effect, the raw water generates a vortex at the rear edge of the through hole of the filter cover. Under the entrainment effect of the vortex, the non-fluid substances in the raw water gather to the center of the vortex, and continuously contact, collide, and bond in the vortex core, and flocculation reactions occur. The flocs are repeatedly extruded by the rotating fluid, and their mass and size become larger and larger, and finally settle with large-mass particles. Therefore, the through holes on the cover surface are constructed into turbulent flow vortex flocculation microreactors one by one. When the size of the micro-vortex produced by the through hole is similar or equal to the particle size of the alum flower, the flocculation reaction is the most sufficient, and the flocculation effect is the best; the more the number of vortex, the greater the vortex intensity, the more thoroughly the dirt is separated, and the alum flower is also The denser it is.

Due to the staggered arrangement of the through holes and the cover plates of the adjacent cover bodies, the particles in the center of the flow channel of the through holes, which are not easy to be entrained by the vortex, collide with the top layer of the cover plate. Due to the high viscosity of the boundary layer near the solid wall, and being hindered by the shape of the cover wall, the moving particles and the cover plate have achieved a stationary collision, that is, the speed of the particles' floating motion has been reduced to zero instantaneously. Stall particles or adhere to the cover wall to form a sludge suspension layer, waiting to intercept the moving particles, after continuous collision, bonding, sweeping, netting, and finally gather into a large mass of dense flocs to settle. Part of the particles move away from the front mask wall as the flow changes direction, and their upward kinetic energy decreases. Particles with reduced energy are easily entrained or intercepted and filtered in the next stage of the process.

The long and narrow space formed by the two covers constitutes a shallow sedimentation tank, and the raw water and the settled sediment move and separate from each other in each shallow sedimentation layer.

The thin mud layer deposited and accumulated on the surface of the cover body slides down along the slope of the cover body by gravity and sinks into the mud collecting bucket.

The multi-layer equidistant periodic arrangement of the filter cover structure makes the flocculation reaction and the shallow pool sedimentation process repeat cycle, the suspended matter in the raw water is continuously removed, and the purification efficiency is greatly improved.

The sewage filter can rotate around the shaft axis. During maintenance, by rotating the rotating shaft quickly, a strong turbulent shear flow can be formed in the through hole and the cover surface, causing high-speed scouring of the filter cover body, and it is very convenient to remove possible deposits and blockages.

Claims (7)

1. effluent filter, it is characterized in that: several shapes are identical, and structure is identical, cover body hollow filter mantle is arranged in parallel vertically, and the centre is passed through with rotating shaft and is connected and fixing; Filter mantle quantity is no less than 1, and adjacent filtration is covered with spacing; Have regularly arranged through hole on the cover; Through hole is evenly distributed embarking on journey radially, along circumferentially being equally spaced.

2. effluent filter as claimed in claim 1 is characterized in that: described filter mantle shape is round table-like, or billiard table shape or spherical crown shape.

3. effluent filter as claimed in claim 1 is characterized in that: described filter mantle cover body hollow, and no bottom surface, round table-like and upper bottom surface billiard table shape filter mantle is a wheel hub structure.

4. effluent filter as claimed in claim 1 is characterized in that: described rotating shaft is a hollow shaft structure.

5. effluent filter as claimed in claim 1 is characterized in that: described filter mantle shape of through holes is triangle, rhombus, rectangle, butterfly shape, circle, ellipse, quadrangle, pentagon, hexagon, polygon or symmetrical curve figure.

6. effluent filter as claimed in claim 1 is characterized in that: described adjacent filter mantle through hole and cover plate interlaced arrangement.

7. effluent filter as claimed in claim 1 is characterized in that: described filter mantle is made of some staggered stack combinations of assembly that have wheel hub and fan-shaped cover.

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