Environment-friendly sewage sedimentation pretreatment device

Abstract

The utility model relates to a kind of environment-friendly sewage sedimentation pretreatment device, it is related to sewage treatment technical field, including pre-sedimentation tank, the upper portion of the pre-sedimentation tank is provided with separation cylinder, the front end of the separation cylinder is installed with sewage inlet pipe in one side, the upper portion of the separation cylinder is installed with separation water outlet pipe, the bottom of the separation cylinder is installed with sludge discharge pipe by connecting pipe, one end of the sludge discharge pipe is equipped with first motor, the other end of the sludge discharge pipe is equipped with sludge discharge port, the inside of the pre-sedimentation tank is equipped with multiple equidistant distribution and parallel inclined plate, the bottom of the pre-sedimentation tank is conical structure, and the bottom of conical structure is equipped with sludge discharge cavity, the lower end of one side of the sludge discharge cavity is installed with second motor, the inside of the sludge discharge pipe and sludge discharge cavity is all installed with auger mechanism, and the scheme solves the problem that a large number of and complex component impurity particles in sewage are not treated directly to deposit, and the problem that the deposition effect is poor and the burden of deposition equipment is increased.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to an environmentally friendly wastewater sedimentation pretreatment device. Background Technology

[0002] A wastewater sedimentation unit is a treatment device that uses gravity to separate suspended solid particles from water in wastewater. Its core principle is to allow wastewater to flow slowly or remain still within the unit. Denser solid particles settle to the bottom under gravity, forming sludge, while the relatively clear water at the top is discharged for subsequent treatment stages. The unit typically includes an inlet zone, sedimentation zone, sludge zone, and effluent zone. By rationally designing the water flow velocity, sedimentation area, and residence time, effective removal of suspended solids from wastewater can be achieved.

[0003] For example, the Chinese authorized patent CN220424775U, entitled "A Wastewater Sedimentation Device," includes a sedimentation space, a frame on the sedimentation space, a first driving component on the frame, a fixed seat at one end of the first driving component, a rotary motor on the fixed seat, and a rotating rod on one side of the rotary motor. The sedimentation space includes a first sedimentation space and a second sedimentation space. A filter cylinder is provided in the first sedimentation space. The filter cylinder includes a cylinder body and a cylinder cover. The rotating rod passes through the cylinder cover and is disposed inside the cylinder body, and the rotating rod is fixedly connected to the cylinder cover. Several stirring rods are provided on the side wall of the rotating rod, and a sludge storage tank is provided at the bottom of the rotating rod. A bottom cleaning device for the second sedimentation space is provided for treating the sediment in the second sedimentation space.

[0004] While the existing technologies can achieve sedimentation of wastewater, the complex composition and high content of impurities in the wastewater mean that direct sedimentation not only increases the workload of the sedimentation equipment, but also the large amount of complex dirt seriously affects the sedimentation effect. Therefore, they do not meet the current needs. To address this, we propose an environmentally friendly wastewater sedimentation pretreatment device. Utility Model Content

[0005] The purpose of this invention is to provide an environmentally friendly wastewater sedimentation pretreatment device to solve the problem mentioned in the background art that the sedimentation effect is poor and the burden on sedimentation equipment is increased when a large number of complex impurity particles in wastewater are directly precipitated without treatment.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an environmentally friendly wastewater sedimentation pretreatment device, comprising a pre-sedimentation tank, a separation cylinder arranged above the pre-sedimentation tank, the lower end of the separation cylinder being conical, a wastewater inlet pipe installed on one side of the front end of the separation cylinder, a separation water outlet pipe installed above the separation cylinder and connected to the pre-sedimentation tank, a sludge discharge pipe installed at the bottom of the separation cylinder via a connecting pipe, a first motor provided at one end of the sludge discharge pipe, a sludge discharge port provided at the other end of the sludge discharge pipe, multiple equidistant and parallel inclined plates arranged inside the pre-sedimentation tank, the included angle of the inclined plates being 60 degrees, the bottom of the pre-sedimentation tank being conical, and a sludge discharge chamber provided at the bottom of the conical structure, a second motor installed at the lower end of one side of the sludge discharge chamber, and a screw conveyor mechanism installed inside both the sludge discharge pipe and the sludge discharge chamber.

[0007] Preferably, one end of the sewage inlet pipe located inside the separation cylinder is attached to the inner wall of the separation cylinder, and the sewage inlet pipe is embedded in the separation cylinder. The end of the sewage inlet pipe located inside the pre-sedimentation tank is inclined.

[0008] Preferably, the auger mechanism includes a rotating shaft and spiral conveying blades, the output shafts of the first motor and the second motor are respectively fixed to the rotating shaft, and the spiral conveying blades are welded to the rotating shaft.

[0009] Preferably, a sealing door is provided at the other end of the sludge discharge chamber, the upper end of the sealing door is hinged to the pre-sedimentation tank, and the lower end of the sealing door is fixed to the pre-sedimentation tank by bolts.

[0010] Preferably, a drain pipe is provided on one side of the pre-sedimentation tank, and a turbidity sensor is installed on the outside of the drain pipe.

[0011] Preferably, the upper part of the pre-sedimentation tank is provided with three sets of backflushing pipes, the bottom of the backflushing pipes is provided with multiple equally spaced nozzles, the other side of the pre-sedimentation tank is provided with a clean water delivery pipe, the outside of the clean water delivery pipe is equipped with a pressure boosting valve, and the clean water delivery pipe is connected to the backflushing pipe through a main water supply pipe.

[0012] Preferably, the front end of the upper surface of the pre-sedimentation tank is provided with two feeding mechanisms. Each feeding mechanism includes a storage tank containing flocculant, and the pipe at the bottom of the storage tank is connected to the pre-sedimentation tank. A valve is installed on the outside of the pipe at the bottom of the storage tank.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model features a separation cylinder with an inclined sewage inlet pipe inside. By connecting the sewage inlet pipe to a sewage pipeline, the sewage enters and undergoes a high-speed spiral swirling motion along the inner wall of the separation cylinder. Under centrifugal force, denser solid particles are thrown against the cylinder wall and slide down to the bottom of the separation cylinder, while less dense water forms an upward flow in the center of the swirling motion and is eventually discharged from the separation water outlet pipe at the top of the separation cylinder. This structure significantly improves the solid-liquid separation efficiency, and compared to traditional sedimentation devices, it can process more sewage in a shorter time. Moreover, it creates a stable swirling flow within the device, effectively reducing the problem of secondary suspension of suspended solids during the separation process.

[0015] 2. This utility model incorporates a pre-sedimentation tank below the separation cylinder. Water discharged from the separation water outlet pipe enters the pre-sedimentation tank and slowly descends under gravity. Multiple parallel inclined plates within the tank divide the sedimentation space into several shallow areas. Wastewater flows in a tortuous manner between the inclined plates. Fine suspended particles in the wastewater settle towards the surface of the inclined plates under the influence of gravity and water flow. The particles slide down the inclined plates to the bottom of the pre-sedimentation tank. The inclined plates greatly increase the sedimentation area, significantly improving sedimentation efficiency based on shallow sedimentation theory. This effectively traps fine suspended solids that are not completely removed by the separation cylinder, further purifying the water quality. The inclined angle and parallel distribution design of the inclined plates shorten the particle sedimentation path, reduce sedimentation time, and improve the overall wastewater treatment speed.

[0016] 3. This utility model features a sludge discharge chamber at the bottom of the pre-sedimentation tank and a sludge discharge pipe below the separation cylinder, both equipped with an auger mechanism. The auger mechanism consists of a rotating shaft and spiral conveying blades. By turning on the motor, the rotating shaft drives the spiral conveying blades to rotate. The spiral conveying blades generate a spiral pushing force in the sludge discharge pipe and sludge discharge chamber, axially conveying the deposited sludge along the pipe or chamber, and finally discharging the sludge from the sludge discharge port of the device. This completes the automatic collection and transportation process of sludge, avoiding the accumulation of sludge in the device that affects the sedimentation effect and ensuring the long-term stable operation of the equipment. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2 This is another perspective view of the present invention;

[0019] Figure 3 This is a sectional perspective view of the present invention;

[0020] Figure 4 This is a schematic diagram of the internal structure of this utility model.

[0021] In the diagram: 1. Pre-sedimentation tank; 2. Separation cylinder; 3. Sewage inlet pipe; 4. Separated water outlet pipe; 5. Connecting pipe; 6. Sludge discharge pipe; 7. First motor; 8. Sludge discharge port; 9. Feeding mechanism; 10. Sealing door; 11. Main water supply pipe; 12. Clean water supply pipe; 13. Pressure booster valve; 14. Drain pipe; 15. Turbidity sensor; 16. Storage tank; 17. Valve; 18. Second motor; 19. Inclined plate; 20. Backflush pipe; 21. Nozzle; 22. Sludge discharge chamber; 23. Rotating shaft; 24. Spiral conveyor blades. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Example 1:

[0024] Please see Figure 1-4 An embodiment of this utility model provides an environmentally friendly wastewater sedimentation pretreatment device, comprising a pre-sedimentation tank 1, a separation cylinder 2 disposed above the pre-sedimentation tank 1, the lower end of the separation cylinder 2 having a conical structure, a wastewater inlet pipe 3 installed on one side of the front end of the separation cylinder 2, a separation water outlet pipe 4 installed above the separation cylinder 2 and connected to the pre-sedimentation tank 1, a sludge discharge pipe 6 installed at the bottom of the separation cylinder 2 via a connecting pipe 5, a first motor 7 provided at one end of the sludge discharge pipe 6, a sludge discharge port 8 provided at the other end of the sludge discharge pipe 6, multiple equally spaced and parallel inclined plates 19 provided inside the pre-sedimentation tank 1, the included angle of the inclined plates 19 being 60 degrees, the bottom of the pre-sedimentation tank 1 having a conical structure, and a sludge discharge chamber 22 provided at the bottom of the conical structure, a second motor 18 installed at the lower end of one side of the sludge discharge chamber 22, and a screw conveyor mechanism installed inside both the sludge discharge pipe 6 and the sludge discharge chamber 22;

[0025] Wastewater enters the separation cylinder 2 through the wastewater inlet pipe 3. Since the wastewater inlet pipe 3 is embedded close to the inner wall of the separation cylinder 2, the wastewater rotates at high speed along the cylinder wall after entering. Under centrifugal force, denser solid particles are thrown against the cylinder wall and slide down to the conical structure at the bottom of the separation cylinder 2, where they accumulate. The separated wastewater flows into the pre-sedimentation tank 1 through the separation water outlet pipe 4. Inside the pre-sedimentation tank 1, the wastewater flows between multiple inclined plates at a 60-degree angle. Fine suspended solids settle to the surface of the inclined plates under gravity and slide down to the sludge discharge chamber 22 at the bottom of the pre-sedimentation tank 1. When sludge discharge is required, the first motor 7 and the second motor 18 are started. The motors drive the rotating shaft 23 to rotate, and the spiral conveying blades 24 rotate accordingly, axially conveying the sludge from the bottom of the separation cylinder 2 through the sludge discharge pipe 6 and the sludge discharge chamber 22 of the pre-sedimentation tank 1 to the sludge discharge port. The separation cylinder combines the principle of centrifugal separation to quickly separate most of the suspended solids in sewage, improving treatment efficiency; the inclined plate in the pre-sedimentation tank increases the sedimentation area and uses the principle of shallow sedimentation to further remove fine particles and improve the quality of effluent; the screw conveyor mechanism enables automatic and continuous discharge of sludge, reducing the workload and frequency of manual dredging and lowering operation and maintenance costs.

[0026] Please see Figure 3 The sewage inlet pipe 3 is located inside the separation cylinder 2, with one end attached to the inner wall of the separation cylinder 2 and embedded in the separation cylinder 2. The sewage inlet pipe 3 is located inside the pre-sedimentation tank 1 with one end set at an angle. The installation method of the sewage inlet pipe 3 inside the separation cylinder 2 allows the sewage to rotate at high speed along the cylinder wall to form a vortex after entering. The angled setting inside the pre-sedimentation tank 1 helps the sewage to flow smoothly into the pre-sedimentation tank, and under the action of gravity, the sewage is more likely to contact the inclined plate in the tank, realizing the sedimentation of suspended solids.

[0027] Please see Figure 3 The auger mechanism includes a rotating shaft 23 and a spiral conveying blade 24. The output shafts of the first motor 7 and the second motor 18 are fixed to the rotating shaft 23 respectively. The spiral conveying blade 24 is welded to the rotating shaft 23. When the first motor 7 and the second motor 18 are started, the output shaft of the motor drives the rotating shaft 23 to rotate, and the spiral conveying blade 24 welded to the rotating shaft 23 rotates accordingly, forming a spiral pushing force in the sludge discharge pipe 6 and the sludge discharge chamber 22, which transports the sludge axially to the sludge discharge port for discharge.

[0028] Please see Figure 1A sealing door 10 is provided at the other end of the sludge discharge chamber 22. The upper end of the sealing door 10 is hinged to the pre-sedimentation tank 1, and the lower end of the sealing door 10 is fixed to the pre-sedimentation tank 1 by bolts. When it is necessary to inspect or clean the sludge discharge chamber 22, the bolts at the lower end of the sealing door 10 are unscrewed, and the sealing door is opened with the hinge as the axis, allowing entry into the sludge discharge chamber for operation. After the operation is completed, the sealing door is closed and the bolts are tightened to restore the sealing state. The sealing door design facilitates the inspection, maintenance, and cleaning of the sludge discharge chamber by personnel, ensuring the normal operation of the sludge discharge chamber and the auger mechanism. At the same time, the sealing structure can prevent sludge leakage and odor emission.

[0029] Please see Figure 1 A drain pipe 14 is provided on one side of the pre-sedimentation tank 1. A turbidity sensor 15 is installed on the outside of the drain pipe 14. Wastewater treated by the pre-sedimentation tank is discharged from the drain pipe 14. The turbidity sensor 15 monitors the turbidity of the water flow in the drain pipe 14 in real time and converts the monitoring data into an electrical signal and transmits it to the control system. The turbidity sensor can provide real-time feedback on the wastewater treatment effect, providing accurate data support for staff to adjust equipment operating parameters and determine whether subsequent treatment processes need to be adjusted, which helps to improve the quality and efficiency of wastewater treatment.

[0030] Example 2:

[0031] Please see Figure 1 , Figure 3 and Figure 4 The upper part of the pre-sedimentation tank 1 is provided with three sets of backflush pipes 20, and the bottom of the backflush pipes 20 is provided with multiple equally spaced nozzles 21. The other side of the pre-sedimentation tank 1 is provided with a clean water delivery pipe 12, and a pressure boosting valve 13 is installed on the outside of the clean water delivery pipe 12. The clean water delivery pipe 12 and the backflush pipes 20 are connected through a water supply main pipe 11.

[0032] When excessive sludge adheres to the surface of the inclined plate in the pre-sedimentation tank 1, affecting the sedimentation effect, the pressure booster valve 13 is opened. Clean water flows from the clean water delivery pipe 12 through the main water supply pipe 11 into the backflushing pipe 20. High-pressure water jets are then sprayed onto the surface of the inclined plate through the nozzle 21 at the bottom of the backflushing pipe 20. The impact force of the water jets flushes the sludge off the inclined plate, causing it to fall into the sludge discharge chamber 22, and then be discharged by the auger mechanism. The automatic backflushing cleaning system effectively prevents the inclined plate from clogging, maintains good sedimentation performance of the inclined plate, and ensures the continuous and efficient operation of the pre-sedimentation tank. Compared with manual cleaning, automated cleaning reduces manpower input and improves cleaning efficiency.

[0033] Example 3:

[0034] Please see Figure 1 and Figure 2The front end of the upper surface of the pre-sedimentation tank 1 is provided with two feeding mechanisms 9. The feeding mechanism 9 includes a storage tank 16 containing flocculant, and the pipe at the bottom of the storage tank 16 is connected to the pre-sedimentation tank 1. A valve 17 is installed on the outside of the pipe at the bottom of the storage tank 16.

[0035] Based on the wastewater quality, valve 17 on the bottom pipe of storage tank 16 is opened, allowing the flocculant in storage tank 16 to flow into pre-sedimentation tank 1 through the pipe, where it mixes thoroughly with the wastewater. The flocculant hydrolyzes and polymerizes in the wastewater, causing tiny suspended particles and colloidal particles in the wastewater to adsorb and agglomerate into larger flocs, accelerating particle settling and improving the sedimentation efficiency of the pre-sedimentation tank. Flocculant can be flexibly added according to different wastewater characteristics to enhance the treatment capacity for various suspended solids and improve the overall pretreatment effect. The feeding mechanism has a simple structure, is easy to operate, and facilitates control of the flocculant dosage, avoiding waste and reducing reagent usage costs. By improving the sedimentation effect, the load on subsequent wastewater treatment stages is reduced.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An environmentally friendly wastewater sedimentation pretreatment device, comprising a pre-sedimentation tank (1), characterized in that: A separation cylinder (2) is provided above the pre-sedimentation tank (1), and the lower end of the separation cylinder (2) is conical. A sewage inlet pipe (3) is installed on one side of the front end of the separation cylinder (2). A separation water outlet pipe (4) is installed above the separation cylinder (2), and the separation water outlet pipe (4) is connected to the pre-sedimentation tank (1). A sludge discharge pipe (6) is installed at the bottom of the separation cylinder (2) through a connecting pipe (5). A first motor (7) is provided at one end of the sludge discharge pipe (6), and a sludge discharge port (8) is provided at the other end of the sludge discharge pipe (6). Multiple equally spaced and parallel inclined plates (19) are provided inside the pre-sedimentation tank (1), and the included angle of the inclined plates (19) is sixty degrees. The bottom of the pre-sedimentation tank (1) is conical, and a sludge discharge chamber (22) is provided at the bottom of the conical structure. A second motor (18) is installed at the lower end of one side of the sludge discharge chamber (22). A screw conveyor mechanism is installed inside both the sludge discharge pipe (6) and the sludge discharge chamber (22).

2. The environmentally friendly wastewater sedimentation pretreatment device according to claim 1, characterized in that: The sewage inlet pipe (3) is located inside the separation cylinder (2) with one end attached to the inner wall of the separation cylinder (2), and the sewage inlet pipe (3) is embedded in the separation cylinder (2). The sewage inlet pipe (3) is located inside the pre-sedimentation tank (1) with one end inclined.

3. The environmentally friendly wastewater sedimentation pretreatment device according to claim 1, characterized in that: The auger mechanism includes a rotating shaft (23) and a spiral conveying blade (24). The output shafts of the first motor (7) and the second motor (18) are fixed to the rotating shaft (23) respectively, and the spiral conveying blade (24) is welded to the rotating shaft (23).

4. The environmentally friendly wastewater sedimentation pretreatment device according to claim 1, characterized in that: The other end of the sludge discharge chamber (22) is provided with a sealing door (10). The upper end of the sealing door (10) is hinged to the pre-sedimentation tank (1), and the lower end of the sealing door (10) is fixed to the pre-sedimentation tank (1) by bolts.

5. The environmentally friendly wastewater sedimentation pretreatment device according to claim 4, characterized in that: A drain pipe (14) is provided on one side of the pre-sedimentation tank (1), and a turbidity sensor (15) is installed on the outside of the drain pipe (14).

6. The environmentally friendly wastewater sedimentation pretreatment device according to claim 1, characterized in that: The upper part of the pre-sedimentation tank (1) is provided with three sets of backflush pipes (20), and the bottom of the backflush pipes (20) is provided with multiple equally spaced nozzles (21). The other side of the pre-sedimentation tank (1) is provided with a clean water delivery pipe (12), and a pressure boosting valve (13) is installed on the outside of the clean water delivery pipe (12). The clean water delivery pipe (12) and the backflush pipes (20) are connected through a water supply main (11).

7. The environmentally friendly wastewater sedimentation pretreatment device according to claim 1, characterized in that: The pre-sedimentation tank (1) has two feeding mechanisms (9) at the front end of its upper surface. The feeding mechanism (9) includes a storage tank (16) containing flocculant, and the pipe at the bottom of the storage tank (16) is connected to the pre-sedimentation tank (1). A valve (17) is installed on the outside of the pipe at the bottom of the storage tank (16).

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