CN112112256A

CN112112256A - Silt-proof sewage interception system of drainage pump station

Info

Publication number: CN112112256A
Application number: CN202011063928.6A
Authority: CN
Inventors: 吴俊�; 马艳; 顾杨; 韩小蒙; 郭恰; 张鑫; 宋姗姗; 智国铮; 李磊; 周新宇; 张东
Original assignee: Shanghai Municipal Water Resources Development And Utilization National Engineering Center Co ltd
Current assignee: Shanghai Municipal Water Resources Development And Utilization National Engineering Center Co ltd
Priority date: 2020-10-01
Filing date: 2020-10-01
Publication date: 2020-12-22

Abstract

The invention provides an anti-silt and anti-sewage system for a drainage pump station, which comprises a tank body, wherein the tank body comprises a sewage intercepting tank and an overflow tank, and further comprises a first water retaining wall, a second water retaining wall, a matrix and an adjustable weir, wherein the matrix is arranged between the first water retaining wall and the second water retaining wall, a sewage channel communicated with the matrix is arranged below the first water retaining wall, one end of the adjustable weir is arranged in contact with the first water retaining wall, and one end of the adjustable weir, which is in contact with the first water retaining wall, can move towards a direction far away from the first water retaining wall. The invention is suitable for the reconstruction and new construction of the combined system drainage pump station and the rainwater pump station with mixed connection. The invention can improve the flow velocity of sewage in the water inlet main pipe of the pump station and the front pool of the pump station in dry days, greatly reduce the deposition of pollutants at the tail end of the water inlet main pipe of the pump station and in the front pool of the pump station, avoid the sediment from entering a receiving water body along with overflow sewage, reduce the loss of a sewage interception pump and reduce the dredging frequency.

Description

Silt-proof sewage interception system of drainage pump station

Technical Field

The invention relates to the technical field of rain sewage treatment, in particular to a silt-preventing and sewage-intercepting system of a drainage pump station.

Background

The drainage pump station comprises a confluence system pump station, a shutoff type rainwater pump station and the like. The combined pumping station and the intercepting type rainwater pumping station are key nodes for pollution interception and overflow at the tail end of a drainage system and are directly related to the urban water environment quality. The problem of the interception amount of sewage is mainly concerned at the beginning of construction of the combined pumping station and the interception type rainwater pumping station, and the effective interception capacity of the pollution load is not carefully analyzed. The combined system pump station and the shutoff type rainwater pump station both comprise a rainwater pump and a sewage pump, the rainwater pump is responsible for draining stagnant water during rainfall, and the sewage pump is responsible for daily lifting or conveying sewage to a sewage treatment plant. No matter the confluence system pump station or the shutoff type rainwater pump station is at the tail end of a certain drainage system, in order to guarantee the operation capacity in the rainfall period, the pipe diameter of a water inlet main pipe of the pump station and the volume of a front pool of the pump station are both large (generally designed according to the maximum rainwater pump flow of 30 seconds, and far exceeds the delivery capacity of the sewage pump). Therefore, in dry days, the sewage in the water inlet main pipe of the pump station has low flow speed, so that a large amount of particulate matters are deposited in the main pipe; meanwhile, the larger front pool volume creates conditions for intermittent operation of the sewage pump, so that a large amount of sewage tends to be static in the front pool of the pump station, and a large amount of pollution particles settle at the bottom of the pool. And when the rainwater pump is started in rainy days, the pollution particles accumulated in the water inlet main pipe of the pump station and the front pool of the pump station are subjected to strong shearing and disturbance, and a large amount of pollution particles overflow to the receiving water body through the rainwater pump.

In order to reduce pollution load of rain day overflow discharge in a combined pumping station and a cut-off type rainwater pumping station, Chinese patent with publication number CN 106836441B applies a cut-off type sewage drainage pumping station cut-off optimization system additionally provided with a porous water-permeable partition wall, which cuts off partial particles in the water-permeable partition wall through the water-permeable partition wall so as to reduce the total amount of pollutants discharged in rain day overflow discharge, but the device cannot fundamentally improve the hydraulic flow dynamic characteristic in a front pool of the pumping station, because the partition wall is permeable, the volume of a communicated block in a pool body is not obviously reduced, the flow rate of water in the pool before dry days is still slow, a large amount of sediments are still deposited in a sewage pump cut-off area of the front pool, and to a certain extent, the mode can bring larger deposition in the front pool, and simultaneously because the flow rate of the sewage pump is small, higher flow shearing force of water flow is difficult to form during dry days, so that the particles still deposit in the, even if the flow of the sewage pump is large, a large amount of particles enter the water pump at the same time, so that the service life of the water pump is greatly shortened, and meanwhile, the normal sewage interception work of a pump station is influenced, and higher overflow pollution risk is brought; in addition, the partition wall is permeable, so that when water flows transversely, the retention time is short, the partition wall cannot be fully contacted with the matrix, and the interception efficiency of particles is low; in addition, the partition wall permeates water to ensure that the sewage in the sewage intercepting area at the inner side is purified to a certain degree, the service life of a medium is shortened, and meanwhile, the COD concentration in the sewage intercepted to a sewage treatment plant is reduced, the C/N ratio of the inlet water of the sewage treatment plant is reduced, and the treatment efficiency is reduced; in addition, the water flow formed by opening the sewage pump and the rainwater pump transversely and directly flows through the permeable partition wall, so that large impact is brought to the structure and stability of the filler in the water flow, particularly the fillers with low density such as quartz sand, zeolite, ceramsite, anthracite and the like, the water flow cannot be fully contacted with the filler, the early occurrence of the blocking condition is easy to cause, and the service life of the filler is shortened; finally, the filler in the permeable partition wall is in an anoxic or anaerobic condition for a long time, and the treatment efficiency of organic pollutants, nitrogen, phosphorus and other substances in the overflow sewage is low. The inconvenience will greatly aggravate the maintenance of the system, and due to many factors, the actual sewage interception effect is general.

Therefore, the anti-silt and anti-sewage system for the drainage pump station is sought to be established, wherein the anti-silt and anti-sewage system has less siltation and strong sewage interception capability in dry days and has less overflow pollution in rainy days.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides the silt-preventing and sewage-intercepting system for the drainage pump station, which can improve the sewage-intercepting efficiency of the pump station, reduce the content of pollutants in the overflow discharge in rainy days, reduce the content of particulate matters and soluble pollutants in the overflow sewage and reduce the content of pollutants in the overflow discharge in rainy days.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a drainage pump station silt-prevention cuts dirty system, includes the cell body, the cell body is located including cutting dirty pond and overflow tank cut dirty pond with first breakwater, second breakwater, matrix between the overflow tank, and locate the adjustable weir of the top of first breakwater, first breakwater is located the second breakwater is close to cut one side in dirty pond, the matrix is located first breakwater with between the second breakwater, first breakwater below be equipped with the sewage passageway of matrix intercommunication, the one end of adjustable weir with first breakwater contact sets up, adjustable weir with the one end of first breakwater contact can be to keeping away from the direction of first breakwater removes.

As a further optimization of the invention, one end of the adjustable weir, which is close to the first water retaining wall, is provided with a water stop.

As a further refinement of the present invention, the adjustable weir includes a body, and an adjustable weir rotating shaft, the body being hinged to the adjustable weir rotating shaft.

As a further optimization of the invention, the water stop belt is in contact with one surface of the first water retaining wall far away from the second water retaining wall.

As a further optimization of the invention, the contact area of the first water retaining wall and the adjustable weir is made of rubber materials.

As a further optimization of the invention, the sewage channel is provided with an interception grid.

As a further optimization of the invention, the first water retaining wall and the bottom of the tank body are arranged at intervals, and the first water retaining wall and the bottom of the tank body are surrounded to form the sewage channel.

As a further optimization of the invention, the device also comprises a breather pipe with one end connected with the substrate.

As a further optimization of the present invention, the height of the second retaining wall is not higher than the height of the first retaining wall.

As a further optimization of the present invention, the height corresponding to the head loss caused by the matrix is not greater than the difference between the top elevation of the adjustable weir and the top elevation of the second retaining wall.

Compared with the prior art, the invention has the beneficial effects that:

according to the silt-preventing and sewage-intercepting system of the drainage pump station, in dry days, sewage fully contacts with a matrix from the sewage channel, and the second water blocking wall blocks the sewage in the sewage intercepting pool and prevents the sewage from entering the overflow pool, so that the dry-day sewage can quickly pass through the sewage intercepting pool, and the deposition of pollutants is reduced. In rainy days, along with the rising of sewage in the sewage intercepting pool, the sewage flows through the substrate from bottom to top and is fully contacted with the substrate, pollutants are effectively degraded and intercepted, the quantity of pollutants in overflow pollution is reduced, when the sewage continues to rise to exceed the second water retaining wall, the sewage enters the overflow pool, when the sewage in the overflow pool reaches a preset water level, the rainwater pump is started, when the water level of the sewage in the overflow pool reaches the height of the adjustable weir, the adjustable weir moves, so that the rainwater and sewage in the sewage intercepting pool quickly enters the overflow pool, the rapid drainage is realized, part of the rainwater and sewage quickly falls into the surface layer of the substrate, the surface layer of the substrate is washed, the blocking risk of the surface layer of the substrate is reduced, when the water level of the rainwater and sewage in the sewage intercepting pool falls, the liquid level in the sewage intercepting pool starts to gradually fall to the liquid level of the adjustable weir, and the adjustable weir resets, the water level in the overflow tank gradually drops to a position below the top elevation of the second water retaining wall, at the moment, the rain and sewage mixed water in the matrix starts to flow from top to bottom to enter the sewage pipe under the influence of the operation of the sewage interception pump, the matrix is reversely washed, and the matrix is repeatedly operated in such a way, so that the blocking condition of the matrix can be greatly reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an anti-silt and dirt-intercepting system of a drainage pump station according to the invention;

FIG. 2 is a schematic cross-sectional view a-a of the embodiment of FIG. 1;

FIG. 3 is a schematic cross-sectional view b-b of the embodiment of FIG. 1;

fig. 4 is a schematic diagram of the turning process of the adjustable weir in the embodiment of fig. 1.

In the above figures, 1, a water inlet pipe; 2. a water inlet gate; 3. a water inlet grille; 4. a water inlet channel; 5. a sewage interception tank; 6. an overflow tank; 7. a first water retaining wall; 8. a second water retaining wall; 9. a substrate; 10. an adjustable weir; 10', an adjustable weir rotating shaft; 10', a water stop; 10 ' ' ' body; 11. a breather pipe; 12. intercepting a grid mesh; 13. a sewage pipe; 14. a rain pipe; 15. a sewage interception pump; 16. a rainwater pump; 17. a tank body; 18. a sewage channel.

Detailed Description

The invention is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 1-4, the invention provides an anti-sludge sewage interception system for a drainage pump station, which comprises a tank body 17, wherein the tank body 17 comprises a sewage interception tank 5 and an overflow tank 6, a first water retaining wall 7, a second water retaining wall 8, a matrix 9 and an adjustable weir 10 arranged above the first water retaining wall 7, the first water retaining wall 7 is arranged on one side of the second water retaining wall 8 close to the sewage interception tank 5, the matrix 9 is arranged between the first water retaining wall 7 and the second water retaining wall 8, a sewage channel 18 communicated with the matrix 9 is arranged below the first water retaining wall 7, one end of the adjustable weir 10 is arranged in contact with the first water retaining wall 7, and one end of the adjustable weir 10 in contact with the first water retaining wall 7 can move in a direction away from the first water retaining wall 7.

In the silt-preventing and sewage-intercepting system of the drainage pump station, in dry weather, sewage fully contacts a substrate 9 along a sewage channel 18 from a sewage-intercepting pool 5, and a second water-retaining wall 8 blocks the sewage in the sewage-intercepting pool 5 to prevent the sewage from entering an overflow pool 6, so that the sewage in dry weather can rapidly pass through the sewage-intercepting pool 5, in rainy weather, along with the rising of the sewage in the sewage-intercepting pool 5, the sewage can flow through the substrate 9 from bottom to top and fully contact with the substrate 9, pollutants are effectively degraded and intercepted, the quantity of pollutants in overflow pollution is reduced, when the sewage continues to rise to exceed the second water-retaining wall 8, the sewage can enter the overflow pool 6, when the sewage in the overflow pool 6 reaches a preset water level, a rainwater pump is started, when the water level of the sewage in the overflow pool 6 reaches the height of an adjustable weir 10, the adjustable weir 10 moves to enable the rainwater in the sewage-intercepting pool 5 to rapidly enter the overflow pool 6, realize quick drainage waterlogging, part rain sewage falls into the top layer of matrix 9 fast, erodees the top layer of matrix 9, has reduced the jam risk on matrix 9 top layer, and when the rain sewage water level in intercepting dirty pond 5 descends, adjustable weir 10 resets, and the system resumes to the dry day operational mode.

With further reference to fig. 4, a water stop 10 "is provided at an end of the adjustable weir 10 close to the first water retaining wall 7, the adjustable weir 10 includes a body 10" ', and an adjustable weir rotating shaft 10 ', the body 10 "' is hinged to the adjustable weir rotating shaft 10 ', the water stop 10" is in contact with a surface of the first water retaining wall 7 away from the second water retaining wall 8, the arrangement is such that the water stop 10 "is effectively sealed when in contact with the first water retaining wall 7 to prevent water from flowing from the intercepting basin 5 to the overflow basin 6, and when it is required to open, the body 10" ' is rotated to make the water stop 10 "away from the first water retaining wall 7, in this embodiment, the contact between the first water retaining wall 7 and the water stop 10" is made of rubber, so as to better contact the seal.

Different from the above embodiments, the adjustable weir 10 is a lifting type, and it should be noted that, no matter the adjustable weir 10 is a lifting type or an overturning type, the adjustable weir 10 may adopt an electric or other active driving manner, and the overturning type may also adopt a hydraulic driving manner.

With further reference to fig. 2 and 3, the sewage channel 18 is provided with an intercepting grid 12, so as to effectively screen large-volume impurities, in this embodiment, the first water retaining wall 7 and the bottom of the tank body 1 are arranged at intervals, the first water retaining wall 7 and the bottom of the tank body 1 are surrounded to form the sewage channel 18, the structure is simple, the flow area is large, in this embodiment, the intercepting grid 12 is a 304 stainless steel mesh structure, and the aperture is 23 mm.

Unlike the previous embodiment, the sewage passage 18 is a connected tubular passage.

Further, still include one end with breather pipe 11 that matrix 9 is connected, breather pipe 11 with the inside intercommunication of matrix 9, effectual assurance 9 inside air circulation of matrix, to microorganism in the matrix 9 provides oxygen, guarantees the effective degradation of corresponding degradation fungus class, breather pipe 11's quantity can set up as required, can be one, also can be a plurality of, in this embodiment, breather pipe 11 is two, breather pipe 11's top elevation is greater than the top elevation of inlet tube 1.

Further, the height of the second water retaining wall 8 is not higher than that of the first water retaining wall 7, so that the problem that the waterlogging cannot be drained quickly between the sewage interception tank 5 and the overflow tank 6 after the adjustable weir 10 is opened is avoided.

Further, still include inlet tube 1, and with the water inlet grille 3 that inlet tube 1 is connected, water inlet grille 3 with cut dirty pond 5 intercommunication.

In the above embodiment, the material of the substrate 9 may be one or more of an elastic filler, a natural medium, a modified medium, and a synthetic medium, and may be partitioned or not partitioned, in this embodiment, the substrate 9 is a melon seed sheet with a particle size of 25-32mm, and a height h obtained by converting a head loss caused by the substrate 9 (h = P/ρ g) is less than or equal to a difference between a top elevation of the adjustable weir 10 and a top elevation of the second waterproof wall 8, so as to effectively ensure that the rain and sewage mixed water enters the overflow tank 6 and the operation of the adjustable weir 10 when the water amount is large; the elevation that the height ratio of second breakwater 8 is first breakwater 7 is higher than 12cm, matrix 9 is in the projected area of the bottom surface of cell body 17 approximately accounts for 18% of cell body 17 basal area, the end mark height of breather pipe 11 is higher than cut the highest water level 3cm of dirty pond 5 when dry day cuts dirty pump 15 full load operation, the apical mark height of breather pipe 11 exceeds cell body surface 3 cm.

The embodiment can effectively avoid the deposition of particles in the front pool of the pump station and the tail end of the water inlet main pipe in dry days, and the total dry weight of deposited sediments is reduced by 85kg in 6 months after the application of the embodiment compared with that in 6 months before the application; under the condition of rainfall less than 25mm in a single day (including the condition that the rainfall field in the local year is more than 92%), the SS concentration of the overflow rain sewage mixed water is averagely reduced by 53% after the embodiment is applied compared with that before the embodiment, wherein the main contribution is caused by the great reduction of the sediment at the tail end of the forebay and the water inlet main pipe.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.

Claims

1. The utility model provides a drainage pump station silt-prevention cuts dirty system, a serial communication port, includes the cell body, the cell body is located including cutting dirty pond and overflow pond cut dirty pond with first breakwater, second breakwater, matrix between the overflow pond, and locate the adjustable weir of the top of first breakwater, first breakwater is located second breakwater is close to cut one side in dirty pond, the matrix is located first breakwater with between the second breakwater, first breakwater below be equipped with the sewage passageway of matrix intercommunication, the one end of adjustable weir with first breakwater contact sets up, adjustable weir with the one end of first breakwater contact can be to keeping away from the direction of first breakwater removes.

2. The sludge preventing and sewage intercepting system of the drainage pump station according to claim 1, wherein a water stop is arranged at one end of the adjustable weir close to the first water retaining wall.

3. The sludge preventing and sewage intercepting system of the drainage pump station according to the claim 2, wherein the adjustable weir comprises a body and an adjustable weir rotating shaft, and the body is hinged on the adjustable weir rotating shaft.

4. The sludge-preventing and sewage-intercepting system of the drainage pump station according to claim 3, wherein the water stop belt is in contact with one surface of the first retaining wall, which is far away from the second retaining wall.

5. The sludge preventing and sewage intercepting system of the drainage pump station according to claim 3, wherein the contact area between the first water retaining wall and the adjustable weir is made of rubber.

6. The silt-preventing and sewage-intercepting system of the drainage pump station according to claim 1, wherein an intercepting grid is arranged at the sewage channel.

7. The sludge-preventing and sewage-intercepting system of the drainage pump station according to claim 1, wherein the first water-retaining wall and the bottom of the tank body are arranged at intervals, and the first water-retaining wall and the bottom of the tank body are enclosed to form the sewage channel.

8. The sludge prevention and interception system of the drainage pumping station according to claim 1, further comprising a vent pipe having one end connected to said substrate.

9. The silt-preventing and sewage-intercepting system of the drainage pumping station according to claim 1, wherein the height of the second retaining wall is not higher than that of the first retaining wall.

10. The sludge preventing and sewage intercepting system of the drainage pump station according to claim 1, wherein the height corresponding to the head loss caused by the matrix is not more than the difference between the top elevation of the adjustable weir and the top elevation of the second retaining wall.