System for sampling and analyzing effluent after sewage treatment

Abstract

The utility model discloses an effluent sampling analysis system after sewage treatment, which comprises an effluent header pipe, a water quality analyzer and a three-way valve, the effluent header pipe is connected between a sewage treatment tank and a clean water tank, a stop valve is arranged on the effluent header pipe, the effluent header pipe is communicated with the water quality analyzer through a sampling pipe, and the three-way valve is connected with the effluent header pipe. A first control valve, a filter, a sampling pump and a second control valve are sequentially arranged on the sampling pipe in the water flow direction, a water outlet of the water quality analyzer is communicated with a water inlet of the three-way valve, and one water outlet of the three-way valve is communicated with the clean water tank; and the other water outlet of the three-way valve is communicated with the water return port of the sewage treatment tank. Automatic and efficient sampling and water quality analysis of the effluent are realized, and the water quality of the effluent after sewage treatment is effectively ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, and specifically designs a effluent sampling and analysis system after sewage treatment. Background Art

[0002] During the sewage treatment process at the sewage plant, the sewage plant needs to sample and test the effluent after sewage treatment to obtain relevant pollutants and their parameter information in the effluent, so as to adjust the sewage treatment process parameters in time to ensure that the discharge meets the standards.

[0003] At present, the traditional sampling method is manual sampling, but it has the disadvantages of being cumbersome and time-consuming. Utility Model Content

[0004] The utility model provides a effluent sampling and analysis system after sewage treatment, which can realize efficient effluent sampling and water quality detection.

[0005] A system for sampling and analyzing effluent after sewage treatment, comprising an effluent main pipe, a water quality analyzer, and a three-way valve, wherein the effluent main pipe is connected between a sewage treatment tank and a clean water tank, a stop valve is arranged on the effluent main pipe, the effluent main pipe is connected to the water quality analyzer through a sampling pipe, a first control valve, a filter, a sampling pump, and a second control valve are arranged in sequence on the sampling pipe along the water flow direction, the water outlet of the water quality analyzer is connected to the water inlet of the three-way valve, one water outlet of the three-way valve is connected to the clean water tank, and the other water outlet of the three-way valve is connected to the return water outlet of the sewage treatment tank.

[0006] Furthermore, the filter is also connected to a tap water supply system via a flushing pipe, and a flushing pump and a third control valve are provided on the flushing pipe.

[0007] Furthermore, the filter includes a shell and a water inlet hole and a water outlet hole relatively opened on the shell, an installation cavity is formed in the shell between the water inlet hole and the water outlet hole, several layers of filter screens are fixed in the installation cavity, a water pipe is arranged in the shell beside the installation cavity, the inlet of the water pipe is connected to the water outlet of the flushing pipe, and multiple water outlets of the water pipe are connected to multiple nozzles, and the nozzles are arranged above each layer of filter screen.

[0008] Furthermore, the filter is arranged at an angle, and the nozzle is arranged above the side of the filter close to the water outlet.

[0009] Furthermore, a drain pipe is also provided in the shell, the water outlet of the drain pipe is connected to the water inlet, and a water collecting branch pipe corresponding to the filter is connected to the water inlet of the drain pipe, and the water inlet of the water collecting branch pipe is provided on the side of the filter close to the water outlet.

[0010] Furthermore, the water collecting branch pipe adopts an open structure, the large end of which is the water inlet, and the small end is connected to the water inlet of the drainage pipe.

[0011] Furthermore, the sampling tubes on both sides of the filter are respectively connected with a first flow meter and a second flow meter.

[0012] Beneficial effects:

[0013] 1. Through the sampling tube and the first control valve, filter, sampling pump and second control valve arranged on the sampling tube, automatic and efficient sampling of effluent after sewage treatment can be achieved, which improves the sampling efficiency and reduces labor costs. At the same time, the water quality analyzer performs water quality detection and analysis on the sampled effluent. If the water quality is qualified, the stop valve is opened to discharge the treated water in the sewage treatment tank to the clean water tank, and the sampled water is discharged into the clean water tank at the same time. If the water quality is unqualified, the stop valve is not opened, and the sampled effluent is sent to the sewage treatment tank through the return water port for secondary treatment, thereby effectively ensuring the effluent water quality and avoiding the detection of unqualified sampled water flowing into the clean water tank to cause pollution.

[0014] 2. The filter can be set up to block the garbage in the outlet water, prevent the garbage from entering the sampling tube and causing the sampling pump to be blocked, and avoid affecting the garbage dump detection data.

[0015] 3. After the system has been running for a period of time, if the first flow meter and the second flow meter detect that the flow rates on both sides of the filter are inconsistent, the filter should be backwashed to avoid clogging and affecting normal water sampling, and to extend the service life of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the pipeline structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the filter structure. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with embodiments and drawings.

[0019] like Figure 1As shown, a system for sampling and analyzing effluent after sewage treatment includes an effluent main pipe 3, a water quality analyzer 12, and a three-way valve 13. The effluent main pipe 3 is connected between a sewage treatment tank 1 and a clean water tank 2. A stop valve 4 is arranged on the effluent main pipe 3. The effluent main pipe 3 is connected to the water quality analyzer 12 through a sampling pipe 5. A first control valve 6, a filter 8, a sampling pump 10 and a second control valve 11 are arranged in sequence on the sampling pipe 5 along the water flow direction. The water outlet of the water quality analyzer 12 is connected to the water inlet of the three-way valve 13, one water outlet of the three-way valve 13 is connected to the clean water tank 2, and the other water outlet of the three-way valve 13 is connected to the return water outlet of the sewage treatment tank 1.

[0020] Based on the above sampling and analysis system, when sampling is performed, the first control valve 6, the sampling pump 10 and the second control valve 11 are opened, and the effluent of the water main 3 is pumped into the water quality analyzer 12 through the sampling pipe 5 for water quality analysis. If the water quality is qualified, the stop valve 4 is opened to discharge the treated water in the sewage treatment tank 1 to the clean water tank 2. At the same time, the three-way valve 13 connects the water quality analyzer 12 and the clean water tank 2 to discharge the sampled water into the clean water tank 2. If the water quality is unqualified, the stop valve 4 is not opened. At the same time, the three-way valve 13 connects the water quality analyzer 12 and the sewage tank 1 to send the sampled effluent to the sewage treatment tank through the return water port for secondary treatment to avoid contamination of the water in the clean water tank 2. In addition, the setting of the filter 8 can block the garbage in the effluent water, prevent the garbage from entering the sampling pipe to cause the sampling pump to be blocked, and avoid the impact of the garbage pile detection data.

[0021] See attached Figure 1 The first flow meter 7 and the second flow meter 9 are connected to the sampling tubes 5 on both sides of the filter 8, respectively. After the system runs for a period of time, if the first flow meter 7 and the second flow meter 9 detect that the flow rates on both sides of the filter are inconsistent, it is determined that there are too many foreign objects such as garbage in the filter 8, causing it to be blocked. At this time, the filter can be backwashed to avoid blockage and affect normal water sampling, and the service life of the filter can be extended.

[0022] from Figure 1 It can also be seen that the filter 8 is also connected to the tap water supply system through a flushing pipe 15, and a flushing pump 16 and a third control valve 17 are provided on the flushing pipe 15. By introducing tap water to backwash the filter 8, it is effectively avoided that the filter 8 is blocked and affects the water sampling, and the service life of the filter can be extended.

[0023] like Figure 2As shown, the filter 8 includes a shell 81 and a water inlet hole 82 and a water outlet hole 83 which are relatively opened on the shell 81, and an installation cavity 84 is formed in the shell 81 between the water inlet hole 82 and the water outlet hole 83, and a plurality of layers of filter screens 85 are fixed in the installation cavity 84. A water pipe 86 is arranged in the shell 81 beside the installation cavity 84, and the inlet of the water pipe 86 is connected to the water outlet of the flushing pipe 15, and a plurality of nozzles 87 are connected to the plurality of water outlets of the water pipe 86, and the nozzles 87 are arranged above each layer of filter screen 85.

[0024] In order to improve the filtering effect, the filter screen 85 is arranged at an angle, and the nozzle 87 is arranged above the filter screen 85 on the side close to the water outlet 83 .

[0025] In order to conveniently collect foreign matter in the water such as garbage left behind by the inclined filter 85, a drain pipe 88 is further provided in the shell 81, and the water outlet of the drain pipe 88 is connected to the water inlet 82, and a water collecting branch pipe 89 corresponding to the filter 85 is connected to the water inlet of the drain pipe 88, and the water inlet of the water collecting branch pipe 89 is provided on the side of the filter 85 close to the water outlet 83.

[0026] In order to facilitate the collection of foreign objects in the water such as garbage and avoid clogging the water collecting branch pipe 89, the water collecting branch pipe 89 adopts an open structure, the large end of which is the water inlet and the small end is connected to the water inlet of the drain pipe 88.

[0027] During the specific implementation of this embodiment, a controller can also be used for automatic control to achieve automatic sampling of outlet water and automatic flushing of the filter. Specifically: the first flow meter 7, the second flow meter 9, the water quality analyzer 12 and the input end group of the controller are electrically connected, and the stop valve 4, the first control valve 6, the sampling pump 10, the second control valve 11, the three-way valve 13, the flushing pump 16 and the third control valve 17 are all connected to the control signal output end group of the controller.

[0028] Working principle:

[0029] Sampling process: During sampling, the controller sends a control command to open the first control valve 6 and the second control valve 11. At this time, the stop valve 4, the three-way valve 13, and the third control valve 7 are closed, and the sampling pump 10 is powered to pump the water from the water outlet main pipe 3 into the water quality analyzer 12 through the sampling pipe 5;

[0030] Water quality analysis process: During analysis, the controller issues a control command to close the first control valve 6 and the second control valve 11, at which time the stop valve 4, the three-way valve 13, and the third control valve 7 remain closed;

[0031] After analysis: if the water quality is qualified, the controller sends a control instruction to open the stop valve 4 to discharge the treated water in the sewage treatment tank 1 to the clean water tank 2. At the same time, the controller sends a control instruction to control the three-way valve 13 to connect the water quality analyzer 12 and the clean water tank 2 to discharge the sampled water into the clean water tank 2. If the water quality is unqualified, the stop valve 4 is not opened. At the same time, the three-way valve 13 is controlled to connect the water quality analyzer 12 and the sewage tank 1 to send the sampled outlet water to the sewage treatment tank through the return water port for secondary treatment. During this process, the other valves remain closed;

[0032] Backwash cleaning process: After the system has been running for a period of time, if the first flow meter 7 and the second flow meter 9 detect that the flow rates on both sides of the filter 8 are inconsistent, the controller determines that there are too many foreign objects such as garbage in the filter 8, causing it to be blocked. The controller sends a command to close the first control valve 6, the second control valve 11, the stop valve 4, and the three-way valve 13, and open the third control valve 17. The flushing pump 16 is energized to pump tap water into the filter 8. The tap water is sprayed out from the nozzle 87 through the water pipe 86 to backwash each layer of the filter 85. The cleaned sewage is collected by the water collection branch pipe 89 and sent to the sewage treatment tank 1 through the drainage pipe 88 for treatment.

[0033] In summary, this system can not only realize the automatic and efficient sampling and water quality analysis of the effluent after sewage treatment, but also determine whether to transport the treated sewage to the clean water tank according to the water quality analysis results, and transport the sampled effluent to the sewage treatment tank or the clean water tank, thereby effectively ensuring the water quality of the effluent after sewage treatment, and avoiding the detection of unqualified sampled water flowing into the clean water tank and causing pollution. In addition, after the system has been running for a period of time, it can automatically backwash the filter according to the flow detection results on both sides of the filter to avoid blockage and affect the normal effluent sampling, and can also extend the service life of the filter.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. A sewage treatment effluent sampling and analysis system, characterized in that: The invention comprises a water outlet main pipe (3), a water quality analyzer (12), and a three-way valve (13); the water outlet main pipe (3) is connected between a sewage treatment tank (1) and a clean water tank (2); a stop valve (4) is arranged on the water outlet main pipe (3); the water outlet main pipe (3) is connected to the water quality analyzer (12) through a sampling pipe (5); a first control valve (6), a filter (8), a sampling pump (10), and a second control valve (11) are arranged in sequence on the sampling pipe (5) along the water flow direction; the water outlet of the water quality analyzer (12) is connected to the water inlet of the three-way valve (13); one water outlet of the three-way valve (13) is connected to the clean water tank (2); and the other water outlet of the three-way valve (13) is connected to the return water port of the sewage treatment tank (1).

2. The sewage treatment effluent sampling and analysis system according to claim 1, characterized in that: The filter (8) is also connected to a tap water supply system via a flushing pipe (15), and a flushing pump (16) and a third control valve (17) are arranged on the flushing pipe (15).

3. The sewage treatment effluent sampling and analysis system according to claim 2, characterized in that: The filter (8) comprises a shell (81) and a water inlet hole (82) and a water outlet hole (83) which are arranged on the shell (81) in a relative manner. An installation cavity (84) is formed in the shell (81) between the water inlet hole (82) and the water outlet hole (83). A plurality of layers of filter screens (85) are fixed in the installation cavity (84). A water delivery pipe (86) is arranged in the shell (81) beside the installation cavity (84). The inlet of the water delivery pipe (86) is connected to the water outlet of the flushing pipe (15). A plurality of nozzles (87) are connected to the plurality of water outlets of the water delivery pipe (86). The nozzles (87) are arranged above each layer of filter screen (85).

4. The sewage treatment effluent sampling and analysis system according to claim 3 is characterized in that: The filter screen (85) is arranged at an angle, and the nozzle (87) is arranged above the filter screen (85) on one side close to the water outlet (83).

5. The sewage treatment effluent sampling and analysis system according to claim 4, characterized in that: A drain pipe (88) is also provided in the shell (81), the water outlet of the drain pipe (88) being connected to the water inlet (82), and a water collecting branch pipe (89) provided in one-to-one correspondence with the filter screen (85) is connected to the water inlet of the drain pipe (88), and the water inlet of the water collecting branch pipe (89) is provided on a side of the filter screen (85) close to the water outlet (83).

6. The sewage treatment effluent sampling and analysis system according to claim 5, characterized in that: The water collecting branch pipe (89) adopts an open structure, the large end of which is a water inlet, and the small end is connected to the water inlet of the drainage pipe (88).

7. The sewage treatment effluent sampling and analysis system according to any one of claims 1 to 6, characterized in that: The sampling tubes (5) on both sides of the filter (8) are respectively connected to a first flow meter (7) and a second flow meter (9).

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