Water supply and drainage sewage pretreatment device

Abstract

The utility model provides a water supply and drainage sewage pretreatment device and belongs to the technical field of water supply and drainage. The device is simple in structure, good in solid-liquid separation effect and convenient for subsequent purification treatment of sewage. A pretreatment box of the device is divided into a whipping groove and an outflow groove through a partition plate, a whipping device is arranged in the whipping groove, sewage carries solid matter to be gathered into the whipping groove, the solid matter is intercepted by the partition plate and reserved in the whipping groove, and the solid matter flows through the partition plate to enter the outflow groove after being stirred and crushed to a certain size through the whipping device; and discharging into a precipitation tank for precipitation treatment to finish solid-liquid separation. The device is simple in overall structure and good in pretreatment effect, subsequent sewage treatment is facilitated, the whipping device is provided with the double-layer blades, the whipping efficiency is high, the whipping effect is good, the partition plates are bent plates, the intercepting effect is good, the water passing efficiency is high, and the solid-liquid separation effect is good due to the inclined holes formed in the intercepting plates.

Description

Technical Field

[0001] This utility model belongs to the field of water supply and drainage technology, and in particular relates to a pretreatment device for water supply and drainage sewage. Background Technology

[0002] In municipal water supply and drainage systems, ensuring smooth operation is essential, as it guarantees the safe and stable operation of public services. Currently, municipal drainage systems frequently experience blockages due to the presence of debris. The lack of pretreatment systems to mitigate these blockages severely impacts residents' daily lives. Therefore, a device capable of pretreating drainage is needed to avoid blockages and ensure residents' convenience and comfort. Utility Model Content

[0003] To address the problems existing in the background technology, this utility model provides a pretreatment device for water supply and drainage sewage. The device has a simple structure, good solid-liquid separation effect, and facilitates subsequent purification treatment of sewage.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a pretreatment device for water supply and drainage sewage, including a pretreatment tank and a sedimentation tank. The pretreatment tank and the sedimentation tank are fixedly arranged. The sedimentation tank is connected to the outlet end of the pretreatment tank. A partition plate is erected in the middle of the inner side of the pretreatment tank. The partition plate divides the pretreatment tank into a stirring tank and an outflow tank. Through water holes are opened on the surface of the partition plate. A discharge pipe is set on the tank wall of the outflow tank away from the stirring tank. The discharge pipe leads to the sedimentation tank. Sewage flows into the stirring tank. Large solid objects are intercepted by the partition plate. Sewage carries small solid objects and flows through the water holes on the partition plate to the outflow tank. Finally, it flows into the sedimentation tank through the discharge pipe for sedimentation treatment.

[0005] The water supply and drainage sewage pretreatment device also includes a stirrer, which is rotatably installed at the center of the bottom surface of the stirring tank. The stirrer is driven to stir and break up the large solid objects remaining in the stirring tank.

[0006] Multiple upper blades and multiple lower blades are fixedly arranged on the outer circular surface of the shaft of the agitator. The multiple upper blades are located at the same height and are evenly distributed around the rotation axis of the agitator. The multiple lower blades are located at the same height and below the upper blades. The multiple lower blades are evenly distributed around the rotation axis of the agitator. The suspended end of each upper blade away from the shaft is bent and tilted upwards. The suspended end of each lower blade away from the shaft is tilted and drooping downwards.

[0007] The water supply and drainage sewage pretreatment device also includes multiple baffle plates. The sedimentation tank is divided into multiple collection tanks by partition plates. Each collection tank has a detachable baffle plate at the upper end of the tank. Each baffle plate has multiple inclined holes that penetrate the upper and lower ends, and the multiple inclined holes are fully installed.

[0008] An overflow outlet is provided on the wall of the sedimentation tank away from the pretreatment tank, and the wastewater that has completed the solid sedimentation treatment in the sedimentation tank is discharged from the sedimentation tank through the overflow outlet.

[0009] The partition plate is configured as a bent plate, with the bend line set horizontally and centered in the longitudinal height, and the concave side of the bend angle of the partition plate facing the mixing groove.

[0010] The beneficial effects of this utility model are as follows: The device has a simple overall structure, with the pretreatment tank and sedimentation tank arranged sequentially in accordance with the direction of sewage flow, effectively separating solids and liquids in the sewage, resulting in good pretreatment effect and facilitating subsequent sewage treatment; the device's agitator is equipped with double-layer blades to agitate solids, resulting in high agitation efficiency and good agitation effect; the device's partition plate is a bent plate with a large working area, good interception effect, and high water flow efficiency; the inclined holes on the device's interception plate effectively prevent solids from repeatedly mixing into the sewage, thus avoiding affecting the water treatment effect. Attached Figure Description

[0011] In the attached diagram:

[0012] Figure 1 This is a schematic diagram of the overall structural layout of this utility model;

[0013] Figure 2 This is a schematic diagram of the pretreatment box structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the sedimentation tank structure of this utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the agitator of this utility model;

[0016] In the diagram: 1. Pretreatment tank; 2. Agitator; 3. Sedimentation tank; 4. Baffle plate; 11. Agitator tank; 12. Outflow tank; 13. Separator plate; 14. Discharge pipe; 21. Upper blade; 22. Lower blade; 31. Overflow outlet; 32. Collection tank; 41. Inclined hole. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0018] A wastewater pretreatment device includes a pretreatment tank 1 and a sedimentation tank 3. Both the pretreatment tank 1 and the sedimentation tank 3 are fixedly arranged. The sedimentation tank 3 is connected to the outlet end of the pretreatment tank 1. A partition plate 13 is erected in the middle of the inner side of the pretreatment tank 1, which divides the pretreatment tank 1 into a stirring tank 11 and an outlet tank 12. A through-hole is opened on the surface of the partition plate 13. A discharge pipe 14 is provided on the tank wall of the outlet tank 12 away from the stirring tank 11. The discharge pipe 14 leads to the sedimentation tank 3. Wastewater flows into the stirring tank 11. Large solid objects are intercepted by the partition plate 13. The wastewater carries small solid objects and flows through the through-hole on the partition plate 13 to the outlet tank 12. Finally, it flows into the sedimentation tank 3 through the discharge pipe 14 for sedimentation treatment.

[0019] The water supply and drainage sewage pretreatment device also includes a mixer 2, which is rotatably installed at the center of the bottom surface of the mixing tank 11. The drive motor for driving the mixer 2 to rotate is located outside the pretreatment box 1. The mixer 2 is connected to the drive end of the drive motor. The mixer 2 is driven to rotate and mix and crush the large solid objects remaining in the mixing tank 11.

[0020] Multiple upper blades 21 and multiple lower blades 22 are fixedly arranged on the outer circumference of the shaft of the agitator 2. The multiple upper blades 21 are located at the same height and are evenly distributed around the rotation axis of the agitator 2. The multiple lower blades 22 are located at the same height and below the upper blades 21. The multiple lower blades 22 are evenly distributed around the rotation axis of the agitator 2. The suspended end of each upper blade 21 away from the shaft is bent and tilted upwards. The suspended end of each lower blade 22 away from the shaft is tilted and drooping downwards. The bent upper blades 21 increase the length of the agitating blades in the limited radial space. The drooping lower blades 22 prevent solids from accumulating on the bottom plate of the agitator 11 and failing to be fully agitated and broken up.

[0021] The wastewater pretreatment device also includes multiple baffle plates 4. The interior of the sedimentation tank 3 is divided into multiple collection tanks 32 by partition plates. Each collection tank 32 has a detachable baffle plate 4 mounted on its upper opening. Each baffle plate 4 has multiple inclined holes 41 that penetrate the upper and lower surfaces. The multiple inclined holes 41 are fully installed. Solid matter carried in the wastewater entering the sedimentation tank 3 settles downwards under the action of gravity. The solid matter falls onto the baffle plate 4 and falls into the collection tank 32 through the inclined holes 41 for collection. Because the inclined holes 41 are inclined, the solid matter entering the collection tank 32 will not float up and re-mix into the wastewater due to the impact of the wastewater flow.

[0022] An overflow outlet 31 is provided on the wall of the sedimentation tank 3 away from the pretreatment tank 1. The height of the overflow outlet 31 is lower than the height of the outlet pipe 14 protruding into the sedimentation tank 3. Wastewater that has completed the solid sedimentation treatment in the sedimentation tank 3 is discharged from the sedimentation tank 3 through the overflow outlet 31.

[0023] The partition plate 13 is configured as a bent plate, with the bend line set horizontally and centered in the longitudinal height, and the concave side of the bend angle of the partition plate 13 facing the stirring groove 11.

[0024] The bending design of the partition plate 13 can increase the plate size of the partition plate 13 within a limited height range, thereby increasing the water flow of the water passage, reducing the probability of solid objects blocking the water passage, and ensuring water flow efficiency.

[0025] The diameter of the water passage hole on the partition plate 13 is smaller than the diameter of the inclined hole 41. The solid material that has been agitated and broken by the agitator 2 can pass through the water passage hole, that is, it can definitely pass through the inclined hole 41, so there will be no jamming.

[0026] Working principle: Wastewater mixed with solids flows into the pretreatment tank 1 and first enters the agitation tank 11. Some wastewater flows through the baffle plate 13 into the outflow tank 12, raising the water level in the pretreatment tank 1. Some small solids pass through the water passage holes of the baffle plate 13 and enter the outflow tank 12 along with the wastewater. Large solids are intercepted by the baffle plate 13 and remain in the agitation tank 11. The agitator 2 rotates and agitates the large solids, breaking them down into smaller sizes until the solids can pass through the water passage holes. The solids are then carried down with the wastewater into the outflow tank 12 and finally discharged into the sedimentation tank 3 through the discharge pipe 14 for sedimentation treatment.

[0027] After wastewater containing solids enters the sedimentation tank 3, the solids settle due to gravity and are collected in the collection tank 32 through the inclined holes 41. The collection tank 32 only needs to be cleaned periodically. Wastewater that has completed sedimentation treatment in the sedimentation tank 3 is discharged from the sedimentation tank 3 through the overflow outlet 31.

[0028] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pretreatment device for water supply and drainage wastewater, characterized in that: The system includes a pretreatment tank (1) and a sedimentation tank (3), both of which are fixedly arranged. The sedimentation tank (3) is connected to the outlet end of the pretreatment tank (1). A partition plate (13) is erected in the middle of the inner side of the pretreatment tank (1). The partition plate (13) divides the pretreatment tank (1) into a stirring tank (11) and an outlet tank (12). A through-hole is opened on the surface of the partition plate (13). A discharge pipe (14) is set on the tank wall of the outlet tank (12) away from the stirring tank (11). The discharge pipe (14) leads to the sedimentation tank (3). Sewage flows into the stirring tank (11). Large solid objects are intercepted by the partition plate (13). Sewage carries small solid objects and flows through the through-hole on the partition plate (13) to the outlet tank (12), and finally flows into the sedimentation tank (3) through the discharge pipe (14) for sedimentation treatment.

2. The water supply and drainage sewage pretreatment device according to claim 1, characterized in that: The water supply and drainage sewage pretreatment device also includes a mixer (2), which is rotatably installed at the center of the bottom surface of the mixing tank (11). The mixer (2) is driven to operate and mix and crush the large solid objects remaining in the mixing tank (11).

3. The pretreatment device for water supply and drainage wastewater according to claim 2, characterized in that: Multiple upper blades (21) and multiple lower blades (22) are fixedly arranged on the outer circular surface of the shaft of the agitator (2). The multiple upper blades (21) are located at the same height and are evenly distributed around the rotation axis of the agitator (2). The multiple lower blades (22) are located at the same height and are located below the upper blades (21). The multiple lower blades (22) are evenly distributed around the rotation axis of the agitator (2). The suspended end of each upper blade (21) away from the shaft is bent and tilted upwards. The suspended end of each lower blade (22) away from the shaft is tilted and drooping downwards.

4. A pretreatment device for water supply and drainage wastewater according to claim 1 or 2, characterized in that: The water supply and drainage sewage pretreatment device also includes multiple baffle plates (4). The sedimentation tank (3) is divided into multiple collection tanks (32) by partition plates. Each collection tank (32) has a baffle plate (4) that can be detached and fixed on the upper end slot. Each baffle plate (4) has multiple inclined holes (41) that penetrate the upper and lower end faces. The multiple inclined holes (41) are fully installed.

5. A pretreatment device for water supply and drainage wastewater according to claim 4, characterized in that: An overflow port (31) is provided on the wall of the sedimentation tank (3) away from the pretreatment tank (1). Wastewater that has completed the solid sedimentation treatment in the sedimentation tank (3) is discharged from the sedimentation tank (3) through the overflow port (31).

6. A pretreatment device for water supply and drainage wastewater according to claim 2, characterized in that: The partition plate (13) is configured as a bent plate, with the bending line set horizontally and centered in the longitudinal height, and the concave side of the bending angle of the partition plate (13) facing the stirring groove (11).

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