Influent sampling system for wastewater treatment plant

Abstract

The utility model discloses a sewage plant water inlet sampling system, including raw water pool, sampling pump and water collecting tank, be equipped with two sampling pumps in raw water pool, and sampling pump is respectively through sampling branch pipe and is gathered to the same sampling pipeline, and the sampling branch pipe downstream of sampling pump is provided with check valve respectively, and the sampling pipeline is provided with sand remover, the end of sampling pipeline is connected to water collecting tank, and the water collecting tank is equipped with filter equipment. The remarkable effect of the utility model is that two sampling pumps are used alternatively and are mutual standby, when the current sampling pump is blocked, another sampling pump can respond quickly and start, guaranteeing that laboratory sampling is continuous, and simultaneously, the newly added sand removing and filtering device can greatly reduce the amount of solid waste entering the laboratory, guaranteeing that there is no accumulation of solid waste in the laboratory, and the working environment of the laboratory is optimized.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection, specifically to a domestic sewage treatment system. Background Technology

[0002] The first step in treating domestic wastewater is to sample and test it to obtain real-time data on BOD, COD, ammonia nitrogen, phosphorus, and other indicators in the raw water. This data will provide a basis for decision-making in subsequent wastewater treatment processes, such as adding chemicals and aeration.

[0003] Wastewater sampling methods vary across different plants. A common approach involves drawing a certain amount of raw water from the raw water tank / pipe and temporarily storing it in a collection tank at the laboratory. The laboratory then releases the sample for testing based on the progress of the tests. However, because the wastewater entering the plant contains solid waste such as hair, kitchen scraps, and sand, the sampling pumps used to draw the raw liquid from the raw water tank / pipe are prone to clogging after prolonged use. This can lead to water shortages in the collection tank, sample loss, and the inability to obtain test samples at the laboratory. It can also cause the sampling pump to overload and burn out the motor. Therefore, at this stage, when the collection tank is low on water or the sampling pump is clogged, it is necessary to shut down the pump for cleaning. Shutting down the sampling pump will undoubtedly affect continuous sampling in the laboratory, which is detrimental to wastewater treatment operations.

[0004] In addition, solid waste in raw wastewater is not an important indicator that needs to be monitored. Large amounts of solid waste such as hair, kitchen waste, and sand are difficult to discharge after entering the laboratory. They are often filtered, collected, and then sent out in a centralized manner, which has an adverse impact on the working environment of the laboratory. Utility Model Content

[0005] To address the issues of discontinuous sampling in laboratories due to sampling pump shutdowns and poor working environments caused by large amounts of solid waste entering the laboratory from wastewater, this invention provides an influent sampling system. This system ensures continuous sampling by using a backup sampling pump and removes most solid waste such as hair, kitchen waste, and sand from the raw wastewater through sand removal and filtration devices, preventing solid waste accumulation in the laboratory. The main technical solutions adopted are as follows:

[0006] A wastewater treatment plant influent sampling system includes a raw water tank, a sampling pump, and a collection tank. The sampling pump is located within the raw water tank, and its output is connected to the collection tank via a sampling pipe. The key feature is:

[0007] Two sampling pumps are installed in the raw water tank. The sampling pumps are connected to the same sampling pipeline through sampling branch pipes. One-way valves are installed on the sampling branch pipes downstream of the sampling pumps. The one-way valves are open in the direction of the sampling pipeline. A sand remover is installed on the sampling pipeline.

[0008] The water collection tank has a water inlet and a water outlet on its wall, and the end of the sampling pipe is connected to the water inlet. The water collection tank is equipped with a filter device, and the water inlet and water outlet are located on opposite sides of the filter device.

[0009] Using the above scheme, one of the two sampling pumps operates selectively. If the pump becomes clogged or the collection tank runs dry, that pump is shut down for cleaning, and the other pump is started. This ensures continuous sampling in the laboratory. The sand separator installed on the sampling pipeline removes larger solid particles from the raw wastewater, and the filter inside the collection tank further removes smaller solid particles, significantly reducing the amount of solid waste entering the laboratory. After testing, the raw wastewater can be directly discharged, preventing solid waste accumulation and optimizing the laboratory's working environment. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 This is a schematic diagram of the structure of the sand separator 40;

[0012] Figure 3 This is a schematic diagram showing the assembly relationship of the water shortage detection device 60 on the water tank 30.

[0013] Figure 4 This is a structural schematic diagram of the tilting frame 62;

[0014] Figure 5 This is a block diagram showing the working logic of sensor 63, controller 70, sampling pump 20, and sand discharge valve. Detailed Implementation

[0015] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0016] like Figures 1 to 5 As shown, a wastewater influent sampling system for a wastewater treatment plant includes a raw water tank 10, a sampling pump 20, and a collection tank 30. The sampling pump 20 is disposed in the raw water tank 10, and the output end of the sampling pump 20 is connected to the collection tank 30 through a sampling pipe 21.

[0017] Two sampling pumps 20 are configured in the raw water tank 10. The sampling pumps 20 are preferably submersible pumps. The sampling pumps 20 are respectively connected to the same sampling pipeline 21 through sampling branch pipes 22. One-way valves 23 are respectively installed on the sampling branch pipes 22 downstream of the sampling pumps 20. The one-way valves 23 are open in the direction of the sampling pipeline 21. The two sampling pumps 20 are backups for each other. During sampling, only one sampling pump 20 is started and the other sampling pump 20 is turned off. The function of the one-way valves 23 is to prevent the sampling water from flowing in the wrong direction.

[0018] A sand separator 40 is installed on the sampling pipe 21. Specifically, the sand separator 40 includes a sand separator tank 41, the tank wall of which is provided with a sand separator tank inlet 4a, a sand separator tank outlet 4b, and a sand discharge outlet 4c. A cylindrical filter element is installed inside the sand separator tank 41, with both ends of the filter element abutting against the inner wall of the sand separator tank 41. The inner area of ​​the cylindrical filter element is the inlet sand collection area, and the outer area is the outlet area. The cylindrical filter element is vertically arranged. The inlet 4a of the sand removal tank is connected to the top of the sand collection area, the sand discharge outlet 4c is connected to the bottom of the sand collection area, and the outlet 4b of the sand removal tank is connected to the outlet area. The outlet 4b of the sand removal tank is located at the upper part of the sand removal tank 41. The inlet 4a and outlet 4b of the sand removal tank are connected in series to the sampling pipe 21. The inlet 4a of the sand removal tank is used to receive water from the sampling pump 20, and the outlet 4b of the sand removal tank is used to supply water to the collection tank 30. The sand discharge outlet 4c is located at the bottom of the sand removal tank 41, and the sand discharge outlet 4c is connected to a sand discharge pipe 26, which is equipped with a sand discharge valve.

[0019] The filter pores configured in the cylindrical filter element can have a relatively large diameter. The raw sewage enters the inlet sand collection area inside the cylindrical filter element through the inlet 4a of the sand removal tank. Large particles of solid waste cannot pass through the cylindrical filter element and accumulate at the bottom of the inlet sand collection area. The sand discharge valve can be opened in time to flush out the large particles of solid waste accumulated at the bottom of the inlet sand collection area.

[0020] To ensure a certain level of redundancy, the actual flow rate and power of the sampling pump 20 selected in the workshop are usually greater than required, resulting in a relatively larger amount of water sample entering the water collection tank 30. In this case, a return pipe 24 can be connected to the sampling pipe 21 between the sand remover 40 and the water collection tank 30, and the end of the return pipe 24 is connected to the raw water pool 10.

[0021] The water collection tank 30 is provided with a water tank inlet 3a, a water tank outlet 3b, and an overflow outlet 3c on its tank wall. The water tank inlet 3a and the water tank outlet 3b are preferably respectively located on two opposite side walls of the water collection tank 30. The end of the sampling pipe 21 is connected to the water tank inlet 3a. The overflow outlet 3c is preferably located at the top of the water collection tank 30.

[0022] The water tank inlet 3a is used to receive raw water from the sand separator 40, and the water tank outlet 3b supplies water to the laboratory through pipes and valves.

[0023] The water collection tank 30 is equipped with a filter device 50. The water tank inlet 3a and water tank outlet 3b are located on both sides of the filter device 50. The overflow outlet 3c and the water tank inlet 3a are located on the same side of the filter device 50. The horizontal position of the overflow outlet 3c is above the horizontal position of the water tank inlet 3a. The overflow outlet 3c is connected to an overflow pipe 25, and the end of the overflow pipe 25 is connected to the raw water tank 10.

[0024] The filter device 50 is a filter screen plate, and the diameter of the filter holes on the filter screen plate can be relatively small. The upper edge of the filter screen plate is horizontally positioned above the horizontal position of the overflow port 3c.

[0025] Since there is a positive correlation between the blockage of sampling pump 20 and the lack of water in water collection tank 30, the blockage of sampling pump 20 means that water collection tank 30 is short of water. In order to monitor the blockage of sampling pump 20 in real time, an equivalent replacement can be considered by monitoring the water shortage of water collection tank 30 in real time.

[0026] Specifically, a water shortage detection device 60 is installed on the water collection tank 30. The water shortage detection device 60 is used to detect the water inlet 3a of the water tank.

[0027] The specific structure of a water shortage detection device 60 may be as follows: the water shortage detection device 60 includes a support 61, a flipping frame 62, and a sensor 63;

[0028] The bracket 61 is fixed to the wall of the water collection tank 30. The bracket 61 can be angle steel / angle iron, and the bracket 61 can be welded and fixed to the water collection tank 30.

[0029] The flipping frame 62 is hinged to the bracket 61; the sensor 63 is fixed to the bracket 61;

[0030] A portion of the tilting frame 62 extends into the water collection tank 30 and is close to the water inlet 3a of the tank. The tilting frame 62 is configured to rotate in response to the impact of incoming water at the water inlet 3a of the tank.

[0031] A portion of the tilting frame 62 is located near the sensor 63, which is configured to be triggered as the tilting frame 62 rotates.

[0032] A further embodiment is as follows: the bracket 61 is fixed to the outer wall of the water collection tank 30 directly above the water tank inlet 3a, and the sensor 63 is located outside the water collection tank 30;

[0033] The flipping frame 62 includes a water flow impact part 621, a switch pressing part 622, and an extension rod 623;

[0034] The extension rod 623 is hinged to the bracket 61. One end of the extension rod 623 extends obliquely downward into the interior of the water collection tank 30, and the other end extends obliquely upward into the exterior of the water collection tank 30. The water flow impact part 621 is fixed to the lower end of the extension rod 623, and the switch pressing part 622 is fixed to the upper end of the extension rod 623.

[0035] The water flow impact part 621 is located inside the water collection tank 30, the water flow impact part 621 faces the water inlet 3a of the water tank, and the switch pressing part 622 faces the sensor 63.

[0036] The extension rod 623 can be a single extension rod or multiple extension rods. The extension rod 623 can be a straight extension rod or an irregular extension rod.

[0037] The tilting frame 62 can be further configured as follows:

[0038] The water flow impact part 621 is moved away from the water tank inlet 3a by the impact of the incoming water, and the sensor 63 is triggered to open as the switch pressing part 622 approaches; at this time, it indicates that there is no shortage of water inside the water collection tank 30.

[0039] When the water flow impact part 621 stops, it approaches the water inlet 3a of the water tank under the action of gravity, and the sensor 63 is turned off as the switch pressing part 622 moves away; at this time, it indicates that the water collection tank 30 is short of water.

[0040] The water flow impact part 621 can be an impact plate, with one side of the impact plate facing the water tank inlet 3a, and the upper edge of the impact plate is fixedly connected to the extension rod 623. The sensor 63 can be a limit switch, and the switch pressing part 622 is a pressing rod that is linked to the sensing component of the limit switch.

[0041] It also includes a controller 70, to which the detection signal of the water shortage detection device 60 (specifically the signal of the sensor 63) is output, and the controller 70 is communicatively connected to the two sampling pumps 20.

[0042] One of the two sampling pumps 20 operates selectively. When the sensor 63 of the water shortage detection device 60 detects that there is no water coming into the water tank inlet 3a, the controller 70 controls the currently operating sampling pump 20 to shut down (specifically, controls the power switch of the currently operating sampling pump 20 to turn off the power), and the other sampling pump 20 starts (specifically, controls the power switch of the other sampling pump 20 to turn on the power). This restores water intake to the water tank inlet 3a until the next time no water is detected coming into the water tank inlet 3a, at which point the above control process is repeated.

[0043] The controller 70 also controls the sand discharge valve to open in stages.

[0044] Beneficial effects: The advantages of this utility model are that one of the two sampling pumps can be used and can serve as a backup for the other. When the current sampling pump is blocked, the other sampling pump can respond quickly and start, ensuring continuous sampling in the laboratory. At the same time, the newly added sand removal and filtration device can greatly reduce the amount of solid waste entering the laboratory, ensuring that there is no accumulation of solid waste in the laboratory and optimizing the working environment of the laboratory.

[0045] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. A wastewater influent sampling system for a wastewater treatment plant, comprising a raw water tank (10), a sampling pump (20), and a collection tank (30), wherein the sampling pump (20) is disposed within the raw water tank (10), and the output end of the sampling pump (20) is connected to the collection tank (30) via a sampling pipe (21), characterized in that: Two sampling pumps (20) are installed in the raw water tank (10). The sampling pumps (20) are connected to the same sampling pipeline (21) through sampling branch pipes (22). One-way valves (23) are installed on the sampling branch pipes (22) downstream of the sampling pumps (20). The one-way valves (23) are open to the sampling pipeline (21). A sand remover (40) is installed on the sampling pipeline (21). The water collection tank (30) is provided with a water tank inlet (3a) and a water tank outlet (3b) on its wall. The end of the sampling pipe (21) is connected to the water tank inlet (3a). A filter device (50) is provided inside the water collection tank (30). The water tank inlet (3a) and the water tank outlet (3b) are located on both sides of the filter device (50).

2. The wastewater influent sampling system according to claim 1, characterized in that: The water collection tank (30) is equipped with a water shortage detection device (60), which is used to detect the water inflow at the water tank inlet (3a).

3. The wastewater treatment plant influent sampling system according to claim 2, characterized in that: The detection signal of the water shortage detection device (60) is output to the controller (70), which is communicatively connected to the two sampling pumps (20).

4. The wastewater treatment plant influent sampling system according to claim 3, characterized in that: One of the two sampling pumps (20) is operated. When the water shortage detection device (60) detects that there is no water coming into the water tank inlet (3a), the controller (70) controls the currently operating sampling pump (20) to shut down and the other sampling pump (20) to start.

5. The wastewater treatment plant influent sampling system according to any one of claims 1-4, characterized in that: The sampling pipe (21) between the sand separator (40) and the water collection tank (30) is connected to a return pipe (24), the end of which is connected to the raw water tank (10).

6. The wastewater treatment plant influent sampling system according to any one of claims 1-4, characterized in that: The top of the water collection tank (30) is provided with an overflow port (3c), which is located on the same side of the filter device (50) as the water tank inlet (3a). The horizontal position of the overflow port (3c) is above the horizontal position of the water tank inlet (3a). The overflow port (3c) is connected to an overflow pipe (25), the end of which is connected to the raw water tank (10).

7. The wastewater treatment plant influent sampling system according to any one of claims 1-4, characterized in that: The sand separator (40) includes a sand separator tank (41), the tank wall of which is provided with a sand separator tank inlet (4a), a sand separator tank outlet (4b) and a sand discharge port (4c). The inlet (4a) and outlet (4b) of the sand removal tank are respectively connected to the sampling pipe (21). The sand discharge port (4c) is located at the bottom of the sand removal tank (41). The sand discharge port (4c) is connected to the sand discharge pipe (26), which is equipped with a sand discharge valve.

8. The wastewater treatment plant influent sampling system according to claim 2, 3 or 4, characterized in that: The water shortage detection device (60) includes a bracket (61), a flipping frame (62), and a sensor (63). The bracket (61) is fixed to the wall of the water collection tank (30), the flipping frame (62) is hinged to the bracket (61), and the sensor (63) is fixed to the bracket (61). A portion of the tilting frame (62) extends into the water collection tank (30) and is close to the water tank inlet (3a). The tilting frame (62) is configured to rotate in response to the impact of incoming water at the water tank inlet (3a). A portion of the flipping frame (62) is close to the sensor (63), which is configured to be triggered as the flipping frame (62) rotates.

9. The wastewater treatment plant influent sampling system according to claim 8, characterized in that: The flipping frame (62) includes a water flow impact part (621), a switch pressing part (622), and an extension rod (623). The extension rod (623) is hinged to the bracket (61), and the water flow impact part (621) and the switch pressing part (622) are respectively fixed to both ends of the extension rod (623); The water flow impact part (621) is located inside the water collection tank (30), the water flow impact part (621) faces the water inlet (3a) of the water tank, and the switch pressing part (622) faces the sensor (63).

Images