CN209293143U - Distributed sewage pretreatment system - Google Patents

Abstract

The utility model discloses a distributed sewage pretreatment system, which comprises an outer wellbore (1), a central wellbore (2), a water inlet pipe (3) and a water outlet pipe (4), the lower end of the central wellbore (2) and the outer wellbore A sewage storage area (5) is formed between the bottoms of (1), and a cylindrical overflow dam (6) is provided between the central wellbore (2) and the outer wellbore (1), and the lower end of the overflow dam (6) is connected by The bottom plate (7) is connected to the central shaft (2), and a water absorption well (8) is formed between the overflow dam (6) and the central shaft (2), and a water pump (9) is arranged in the water absorption well (8), and the water pump (9) Connected with the water outlet pipe (4), the water inlet pipe (3) can discharge sewage into the sewage storage area (5). The distributed sewage pretreatment system can store and pretreat sewage on site, and after in-situ pressurization and lifting, transport it to the sewage treatment plant for further centralized treatment through non-pressurized sewage pipelines and integrated pipe corridors.

Description

A Distributed Sewage Pretreatment System

technical field

The utility model relates to the field of sewage treatment, in particular to a distributed sewage pretreatment system.

Background technique

The current municipal sewage treatment system is mainly a centralized treatment system, that is, after the sewage within the designated sewage discharge range is collected, it will be transported to the sewage treatment plant through the non-pressure pipe network system for unified and centralized treatment. In the centralized treatment method, the sewage pipes are transported through lower buried depths, and the investment in the municipal pipe network accounts for 60% to 70% of the investment in sewage treatment.

For example, the sewage pipes are buried with a certain slope, and the sewage in the designated sewage area is transported to the sewage treatment plant in a non-pressure pipeline for treatment. The sewage pipes need to be equipped with inspection wells at intervals of tens of meters according to the diameter of the pipes. The disadvantage is that the sewage pipes are laid without pressure, and the buried depth of the pipes increases, and the sewage pipes at the end of the sewage area can even reach a depth of minus 7 or 8 meters. The non-pressurized sewage pipeline needs to set up inspection wells every tens of meters for maintenance and dredging. This kind of setting greatly occupies the limited space of municipal roads, and also leads to many manhole covers on the roads.

The construction of comprehensive utility corridors can effectively eliminate urban "pull links", ensure smooth road traffic, and ensure safe operation of underground pipelines. However, the pressureless transportation of sewage pipelines, the setting of inspection wells and the buried depth of pipelines all restrict its inclusion in the comprehensive pipe gallery, which also prevents the advantages of the comprehensive pipe gallery from being fully highlighted in municipal engineering. The non-pressurized sewage pipeline is not conducive to being incorporated into the comprehensive pipe gallery, and cannot completely eliminate the urban "pull link", and cannot reflect all the advantages of the construction of the pipe gallery.

Utility model content

In order to bring the sewage pipeline into the comprehensive pipe gallery, the utility model provides a distributed sewage pretreatment system, which can store and pretreat sewage on the spot, and pass through without pressure after in-situ pressurization and lifting. Sewage pipes and comprehensive pipe corridors are transported to the sewage treatment plant for further centralized treatment.

The technical utility model adopted by the utility model to solve the technical problems is: a distributed sewage pretreatment system, including an outer wellbore, a central wellbore, a water inlet pipe and a water outlet pipe, the central wellbore is set inside the outer wellbore, and the A sewage storage area is formed between the lower end and the bottom of the outer wellbore. A cylindrical overflow dam is provided between the central wellbore and the outer wellbore. The lower end of the overflow dam is connected to the central wellbore through the connecting floor. A water absorption well is formed, and a water pump is arranged in the water absorption well, and the water pump is connected with a water outlet pipeline, and the water inlet pipeline can discharge sewage into the sewage storage area.

The water inlet pipe is in a horizontal state, the inlet end of the water inlet pipe is located outside the outer shaft, and the outlet end of the water inlet pipe is connected with the central shaft.

A ring-shaped station platform is provided between the outer shaft and the center shaft, the station platform is located above the suction well, and the outlet end of the water inlet pipe is located below the station platform.

The water outlet pipeline includes a horizontal section and a vertical section, the lower end of the vertical section is connected with the water pump, the upper end of the vertical section is connected with the inner end of the horizontal section, and the outer end of the horizontal section is located outside the outer shaft.

The horizontal section of the water outlet pipeline is located between the upper end of the outer shaft and the station platform, and the station platform is provided with hoisting holes, and the positions of the hoisting holes correspond to the positions of the water pumps.

A cover plate is arranged in the hoisting hole, and a grille is arranged at the outlet end of the water inlet pipe.

The grid is a basket grid or crushed grid, and an inner guide rail is arranged in the central shaft, and the inner guide rail is arranged along the vertical direction, and the grid can move up and down along the inner guide rail.

A manhole cover is arranged inside the upper end of the central shaft, and a connecting top plate is arranged between the upper end of the outer shaft and the upper end of the central shaft.

A ladder is provided in the central shaft, and the lower end of the ladder corresponds to the station platform, or the lower end of the ladder corresponds to the bottom of the outer shaft.

The water pump is an auto-coupling submersible pump. An outer guide rail is arranged at the auto-coupling connection of the water pump. The outer guide rail is arranged along the vertical direction, and the water pump can move up and down along the outer guide rail.

The beneficial effects of the utility model are:

1. The utility model integrates the water collection well and the water pump, so that the sewage in a small area can be collected for pretreatment in the early stage, and the distributed treatment of sewage can be realized.

2. The pre-pretreated sewage can be transported to the sewage treatment plant under pressure through the lifting pump, breaking through the limitation of sewage relying on gravity flow pipeline transportation.

3. Sewage is transported by pressure flow pipelines, which can solve the shortcomings of traditional gravity flow pipelines that need to increase the buried depth of sewage pipelines with the increase of slope, and reduce investment costs.

4. Sewage pressure flow transportation does not need to set sewage inspection wells at a certain distance like traditional sewage pipeline transportation, which solves the problem of many manhole covers on municipal roads.

5. Before the drainage pipe enters the water collection well, a basket grill can be installed to intercept large particle obstacles. Guide rails are set at the junction of the grill and the pipe. When there are many obstacles intercepted by the grill, the old grill can be lifted out through the guide rails and a new one can be introduced. grid. The grille can also be equipped with a crushing type, which crushes large particles of obstacles into fine particles, and the fine particles are lifted to the pipeline by the lift pump and discharged to the sewage treatment plant.

6. The sewage overflows from the overflow dam of the central shaft well to the suction well, which can make the water flow uniform and benefit the water absorption performance of the pump.

7. Control the start, stop, alarm, etc. of the lifting pump according to the liquid level, without manual operation.

8. Guide rails are set at the self-coupling connection of the water pump. During the maintenance of the pump, the water pump is transported up and down through the guide rails. After the maintenance, the water pump is sent to the self-coupling joint of the water pump in the suction well through the guide rails, and the water pump can be connected by self-coupling by adjusting the guide rails. Personnel go down to operate.

9. The central cylinder is equipped with a ladder, through which one can reach the station platform or the bottom of the integrated device. The submersible pump hoisting hole is set on the platform, which is convenient for the submersible pump to be transported to the ground for inspection and maintenance through the guide rail.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model.

Fig. 1 is a schematic longitudinal sectional view of the distributed sewage pretreatment system of the present invention.

Fig. 2 is an enlarged schematic diagram of the distributed sewage pretreatment system described in the present invention.

1. Outer shaft; 2. Central shaft; 3. Inlet pipe; 4. Outlet pipe; 5. Sewage storage area; 6. Overflow dam; 7. Connecting bottom plate; 8. Suction well; 9. Water pump; 10. Station Man platform; 11. Hoisting hole; 12. Cover plate; 13. Manhole cover; 14. Connecting roof; 15. Ladder; 16. Outer guide rail; 17. Inner guide rail; 18. Grille;

41. Horizontal section; 42. Vertical section.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

A distributed sewage pretreatment system, comprising an outer wellbore 1, a central wellbore 2, a water inlet pipe 3 and an outlet pipe 4, the central wellbore 2 is set inside the outer wellbore 1, and the lower end of the central wellbore 2 is higher than the lower end of the outer wellbore 1 A sewage storage area 5 is formed between the lower end of the central wellbore 2 and the bottom of the outer wellbore 1, and a cylindrical overflow dam 6 is arranged between the central wellbore 2 and the outer wellbore 1, and the lower end of the overflow dam 6 connects the bottom plate 7 with the The central well shaft 2 is connected, and a water absorption well 8 is formed between the overflow dam 6 and the central well shaft 2. The bottom of the water absorption well 8 is in a closed state, and the top of the water absorption well 8 is in an open state. A water pump 9 is arranged in the water absorption well 8. The water pump 9 and The outlet pipe 4 is connected, the water pump 9 can discharge the sewage in the suction well 8 through the outlet pipe 4, and the water inlet pipe 3 can discharge the sewage into the sewage storage area 5, as shown in Figures 1 and 2.

In this embodiment, the centerline of the outer wellbore 1, the centerline of the central wellbore 2 and the centerline of the overflow dam 6 coincide, an annular space is formed between the overflow dam 6 and the central wellbore 2, and the overflow dam 6 and the outer wellbore 1 also forms an annular space between them. The water inlet pipe 3 is in a horizontal state, the inlet end of the water inlet pipe 3 is located outside the outer shaft 1, the outlet end of the water inlet pipe 3 is connected with the central shaft 2, and the sewage is fed into the central shaft.

In this embodiment, an annular plate-shaped station platform 10 is provided between the outer shaft 1 and the central shaft 2, the station platform 10 is parallel to the horizontal plane, the station platform 10 is located above the water suction well 8, and the station platform 10 is located Below the top of the central well shaft 2 , the outlet end of the water inlet pipe 3 is located below the station platform 10 . The outlet pipe 4 contains a horizontal section 41 and a vertical section 42 connected in sequence, the lower end of the vertical section 42 is connected with the water pump 9, the upper end of the vertical section 42 is connected with the inner end of the horizontal section 41, and the outer end of the horizontal section 41 is located outside Shaft 1 outside.

In this embodiment, the horizontal section 41 of the outlet pipe 4 is located between the upper end of the outer well shaft 1 and the station platform 10, and the station platform 10 is provided with a hoisting hole 11, and the position of the hoisting hole 11 corresponds to the position of the water pump 9 . The station platform 10 is provided with a plurality of hoisting holes 11, and the suction well 8 is provided with a plurality of water pumps 9, and the positions of the hoisting holes 11 correspond to the positions of the water pumps 9 one by one. The hoisting hole 11 is provided with a cover plate 12, the outlet end of the water inlet pipe 3 is provided with a grid 18, the grid 18 is a basket grid or crushed grid, and the inner guide rail 17 is provided in the central well shaft 2, and the inner guide rail 17 Arranged in the vertical direction, the grid can move up and down along the inner guide rail 17 . Basket grill or crushed grill, as shown in Figure 1.

In this embodiment, a manhole cover 13 is provided inside the upper end of the central shaft 2, and a connecting top plate 14 is provided between the upper end of the outer shaft 1 and the upper end of the central shaft 2, and the connecting top plate 14 is circular. A ladder 15 is provided in the central shaft 2, and the lower end of the ladder 15 corresponds to the station platform 10, or the lower end of the ladder 15 corresponds to the bottom of the outer shaft 1. Water pump 9 is a self-coupling submersible pump, and the self-coupling connection of water pump 9 is provided with outer guide rail 16, and outer guide rail 16 is arranged along the vertical direction, and water pump 9 can move up and down along outer guide rail 16.

In the utility model, the water collection well (outer well shaft 1) and the lifting pump station (water pump 9) are integrated, which can carry out preliminary treatment and realize distributed sewage treatment. The discharge pipes are arranged in the comprehensive pipe gallery, and the sewage can be transported to the sewage treatment plant under pressure, which breaks through the limitation that the sewage pipes rely on gravity flow.

In the utility model, the sewage is transported by the pressure pipeline, which solves the disadvantage of increasing the depth of the pipeline with the slope when the traditional gravity flow pipeline is transported, and reduces the investment cost. The sewage pipeline adopts pressure flow transportation without setting up sewage inspection wells, which solves the problems of large area occupied by sewage inspection wells and many manhole covers on municipal roads.

In the utility model, before the water inlet pipe 3 enters the water collection well, a basket grill is arranged to intercept large particle obstacles; a crushing type grill is arranged to crush the large particle obstacles into fine particles. A guide rail is set at the junction of the grille and the pipe, through which the old grille can be lifted out and the new grille can be introduced.

In the utility model, the sewage overflows from the central shaft overflow dam to the water absorption well, which is beneficial to the water absorption performance of the water pump. Control the start, stop, alarm, etc. of the lifting pump according to the liquid level, without manual operation. The self-coupling connection of the water pump is equipped with a guide rail, through which the water pump can be transported to the ground for inspection and maintenance. At the same time, the water pump can be connected by self-coupling by adjusting the guide rail, without the need for personnel to go into the well for operation.

In the utility model, the central cylinder is provided with a ladder, which is convenient for personnel to enter and exit. The submersible pump hoisting hole is set on the platform, which is convenient for the submersible pump to be transported to the ground for inspection and maintenance through the guide rail.

The above is only a specific embodiment of the utility model, and it cannot limit the scope of utility model implementation, so the replacement of its equivalent components, or the equivalent changes and modifications made according to the patent protection scope of the utility model should still belong to areas covered by this patent. In addition, in the utility model, the technical features and the technical features, the technical features and the technical utility models, and the technical utility models and the technical utility models can be freely combined and used.

Claims (10)

1. a kind of distribution pretreatment system for sewage, which is characterized in that the distribution pretreatment system for sewage includes outer shaft wall (1), center pit shaft (2), water inlet line (3) and outlet conduit (4), center pit shaft (2) are sheathed in outer shaft wall (1), centerwell Sewage storage area (5) are formed between the lower end of cylinder (2) and the bottom of outer shaft wall (1), between center pit shaft (2) and outer shaft wall (1) The lower end of overfall dam (6) equipped with tubular, overfall dam (6) is connect by connecting bottom board (7) with center pit shaft (2), overfall dam (6) Absorbing well, absorption well (8) are formed between center pit shaft (2), are equipped with water pump (9) in absorbing well, absorption well (8), water pump (9) and outlet conduit (4) are even It connects, sewage can be discharged into sewage storage area (5) by water inlet line (3).

2. distribution pretreatment system for sewage according to claim 1, which is characterized in that water inlet line (3) is horizontal The arrival end of state, water inlet line (3) is located at outer shaft wall (1) outside, and the outlet end of water inlet line (3) is connect with center pit shaft (2).

3. distribution pretreatment system for sewage according to claim 2, which is characterized in that outer shaft wall (1) and center pit shaft (2) people from station platform (10) of annular is equipped between, people's platform (10) of standing is located at the top of absorbing well, absorption well (8), and water inlet line (3) goes out Mouth end is located at the lower section at people from station platform (10).

4. distribution pretreatment system for sewage according to claim 3, which is characterized in that outlet conduit (4) contains level Section (41) and vertical section (42), the lower end of vertical section (42) are connect with water pump (9), the upper end and horizontal segment (41) of vertical section (42) Inner end connection, the outer end of horizontal segment (41) is located at outer shaft wall (1) outside.

5. distribution pretreatment system for sewage according to claim 4, which is characterized in that the horizontal segment of outlet conduit (4) (41) between the upper end and people from station platform (10) of outer shaft wall (1), people's platform (10) are stood equipped with hole for hoist (11), hole for hoist (11) position is corresponding with the position of water pump (9).

6. distribution pretreatment system for sewage according to claim 5, which is characterized in that be equipped with cover board in hole for hoist (11) (12), the outlet end of water inlet line (3) is equipped with grid (18).

7. distribution pretreatment system for sewage according to claim 6, which is characterized in that the grid (18) is basket grid Or crushed rack bar screen, center pit shaft (2) is interior to be equipped with interior guide rail (17), and interior guide rail (17) is arranged along the vertical direction, grid (18) energy It is enough to be moved up and down along interior guide rail (17).

8. distribution pretreatment system for sewage according to claim 1, which is characterized in that in the upper end of center pit shaft (2) Equipped with well lid (13), connection top plate (14) is equipped between the upper end of outer shaft wall (1) and the upper end of center pit shaft (2).

9. distribution pretreatment system for sewage according to claim 3, which is characterized in that be equipped with and climb in center pit shaft (2) The lower end of terraced (15), ladder (15) is corresponding with station people's platform (10) or the bottom phase of the lower end of ladder (15) and outer shaft wall (1) It is corresponding.

10. distribution pretreatment system for sewage according to claim 1, which is characterized in that water pump (9) is autocoupling type diving Outer guide (16) are arranged in the self coupling junction of pump, water pump (9), and outer guide (16) is arranged along the vertical direction, and water pump (9) can be along outer Guide rail (16) moves up and down.