Raw water sampling system for sewage treatment plant

Abstract

The utility model discloses a raw water sampling system of a sewage treatment plant, which comprises a raw water pipeline, a sampling pipe communicated with the raw water pipeline and a laboratory and a flushing pipe, a first control valve and a sampling pump are sequentially arranged on the sampling pipe along the water flow direction, one end of the flushing pipe is communicated with the raw water pipeline, and the other end of the flushing pipe is communicated with the laboratory. A second control valve, a flushing pump and a third control valve are sequentially arranged on the flushing pipe along the water flow direction, the other end of the flushing pipe is communicated with a water outlet of the sampling pump, and a fourth control valve is arranged on the sampling pipe between the sampling pump and the laboratory. On the basis of automatically sampling raw water through the sampling pump, the flushing pipe and the flushing pump are arranged, so that the sampling pump can be flushed when needed, the sampling pump is prevented from being blocked, and normal sampling work is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, and specifically designs a raw water sampling system for a sewage treatment plant. Background Art

[0002] During the sewage treatment process at the sewage plant, the laboratory of the sewage plant needs to sample and test the raw water (sewage before treatment) at different time periods to obtain relevant pollutants and their parameter information in the raw water, so as to control and adjust the sewage treatment process parameters. At present, there are two traditional sampling methods: one is manual sampling, but it has the defects of cumbersome operation and time-consuming; the other is to connect branches to the raw water pipeline, install sampling pumps to run intermittently, and transport the sampled sewage to the laboratory, but due to the complex composition and many debris in the raw water, it is easy to cause the sampling pump to be blocked. Utility Model Content

[0003] The utility model provides a raw water sampling system for a sewage treatment plant, so as to overcome the problems existing in the two existing raw water sampling methods described in the background technology.

[0004] A raw water sampling system for a sewage treatment plant comprises a raw water pipeline, a sampling tube and a flushing tube connecting the raw water pipeline and a laboratory, a first control valve and a sampling pump are sequentially arranged on the sampling tube along the water flow direction, one end of the flushing tube is connected to the raw water pipeline, a second control valve, a flushing pump and a third control valve are sequentially arranged on the flushing tube along the water flow direction, the other end of the flushing tube is connected to the water outlet of the sampling pump, and a fourth control valve is arranged on the sampling tube between the sampling pump and the laboratory.

[0005] Furthermore, the water outlet of the flushing pump is also connected to the water inlet of the sampling pump through a first water pipe, and a fifth control valve is provided on the first water pipe. The water outlet of the sampling pump is also connected to the raw water pipeline through a second water pipe, and a sixth control valve is provided on the second water pipe.

[0006] Furthermore, a filtering device is provided on the flushing pipe between the raw water pipeline and the second control valve.

[0007] Furthermore, the water outlet of the filter device is located directly above its water inlet, and the flushing pipe connected to the water inlet of the filter device is vertically arranged.

[0008] Furthermore, the filtering device includes a shell and a water inlet interface and a water outlet interface formed at the upper and lower ends of the shell, and at least one layer of filter screen is arranged from bottom to top in the shell.

[0009] Furthermore, the pores of the filter holes of the filter screen gradually decrease from bottom to top.

[0010] Furthermore, the top of the filter device is connected to a reclaimed water storage tank via a recoil pipe, and a water pump and a seventh control valve are provided on the recoil pipe.

[0011] Beneficial effects:

[0012] 1. On the basis of automatically sampling raw water through the sampling pump, the sampling pump can be flushed when necessary through the setting of the flushing pipe and flushing pump to avoid clogging of the sampling pump and ensure the normal sampling work;

[0013] 2. Through the arrangement of the flushing pipe, the first water pipe, the second water pipe, and the selective opening and closing of the first to sixth control valves, the system has multiple working modes, including laboratory sampling, forward flushing of the sampling pump, and backwashing of the sampling pump, which can meet the needs of various scenarios, with better applicability and more convenient use;

[0014] 3. The vertically arranged filtering device can facilitate the fall of impurities into the raw water pipe to avoid blockage of the filtering device and the flushing pump. If necessary, the filtering device can be flushed with the grey water in the grey water storage tank through a water pump to ensure its normal use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the pipeline structure of the utility model;

[0016] Figure 2 It is a structural diagram of the filtering device. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with embodiments and drawings.

[0018] like Figure 1-Figure 2 As shown, a raw water sampling system for a sewage treatment plant includes a raw water pipeline 1, a sampling tube 2 connecting the raw water pipeline 1 and a laboratory, and a flushing tube 3. A first control valve 4 and a sampling pump 5 are sequentially arranged on the sampling tube 2 along the water flow direction. One end of the flushing tube 3 is connected to the raw water pipeline 1. A second control valve 6, a flushing pump 7, and a third control valve 8 are sequentially arranged on the flushing tube 3 along the water flow direction. The other end of the flushing tube 3 is connected to the water outlet of the sampling pump 5. A fourth control valve 9 is arranged on the sampling tube 2 between the sampling pump 5 and the laboratory.

[0019] By adopting the above design, the first control valve 4 and the fourth control valve 9 are opened, and the second control valve 6 and the third control valve 8 are closed, raw water sampling can be carried out through the sampling pump 5, and the raw water in the raw water pipeline 1 can be transported to the laboratory through the sampling tube for detection of pollutants and their parameter information; after running for a period of time, the fourth control valve 9 can be closed, and the first control valve 4, the second control valve 6 and the third control valve 8 can be opened, and the raw water in the raw water pipeline 1 can be pumped into the sampling pump 5 through the flushing pump 7 for reverse flushing, thereby effectively avoiding clogging of the sampling pump 5 and affecting the normal raw water sampling.

[0020] Preferably, the water outlet of the flushing pump 7 is also connected to the water inlet of the sampling pump 5 through a first water pipe 10, and a fifth control valve 11 is provided on the first water pipe 10. The water outlet of the sampling pump 5 is also connected to the raw water pipeline 1 through a second water pipe 12, and a sixth control valve 13 is provided on the second water pipe 12.

[0021] Based on the above design, when the sampling pump 5 needs to be flushed, the first control valve 4, the third control valve 8, and the fourth control valve 9 can be closed, and the second control valve 6, the fifth control valve 11, and the sixth control valve 13 can be opened. Then, the raw water in the raw water pipe 1 is pumped into the sampling pump 5 through the first water pipe 10 by the flushing pump 7 for forward flushing. The raw water after flushing is input into the raw water pipe 1 through the second water pipe 12 and sent to the sewage treatment plant for treatment.

[0022] In this embodiment, in order to prevent the flushing pump from being blocked, a filtering device 14 is provided on the flushing pipe 3 between the raw water pipeline 1 and the second control valve 6 .

[0023] Furthermore, the water outlet of the filter device 14 is located directly above its water inlet, and the flushing pipe 3 connected to the water inlet of the filter device 14 is vertically arranged. The above structural design allows impurities to fall into the raw water pipe 1 and be sent to the sewage treatment plant when the flushing pump 7 stops working.

[0024] In this example, the filtering device 14 includes a shell 141 and a water inlet interface 142 and a water outlet interface 143 formed at the upper and lower ends of the shell 141. Two layers of filter screens 144 are arranged from bottom to top in the shell 141. The pores of the filter holes 145 of each layer of the filter screen 144 gradually decrease from bottom to top, and the pores of the filter holes 145 of the lower layer of the filter screen 144 are larger than those of the upper layer of the filter screen 144.

[0025] Preferably, the top of the filtering device 14 is also connected to a reclaimed water storage tank 15 via a backwash pipe 18 , and a water pump 16 and a seventh control valve 17 are provided on the backwash pipe.

[0026] In order to avoid clogging of the filter device 14, after the system has been running for a period of time, the water pump 16 and the seventh control valve 17 can be turned on to pump the grey water in the grey water storage tank 15 into the filter device 14 through the backwash pipe 18 to backwash the filter device 14, thereby ensuring the normal operation of the filter device 14.

[0027] Based on the pipeline structure of this system, the specific working principle is as follows:

[0028] 1. Laboratory sampling mode: open the first control valve 4 and the fourth control valve 9, close the second control valve 6, the third control valve 8, the fifth control valve 11, the sixth control valve 12, and the seventh control valve 17, the sampling pump 5 works, the cleaning pump 7 and the water pump 16 do not work, the sampling pump 5 performs raw water sampling and transports the raw water in the raw water pipeline 1 to the laboratory through the sampling tube for detection of pollutants and their parameter information;

[0029] 2. Sampling pump positive flushing mode: open the second control valve 6, the fifth control valve 11, and the sixth control valve 13, close the first control valve 4, the third control valve 8, the fourth control valve 9, and the seventh control valve 17, the cleaning pump 7 works, the sampling pump 5 and the water pump 16 do not work, the flushing pump 7 pumps the raw water in the raw water pipeline 1 into the sampling pump 5 through the first water pipe 10 for positive flushing, and the raw water after flushing is input into the raw water pipeline 1 through the second water pipe 12 and sent to the sewage treatment plant for treatment;

[0030] 3. Sampling pump backwash mode: open the first control valve 4, the second control valve 6 and the third control valve 8, close the fourth control valve 9, the fifth control valve 11, the sixth control valve 13 and the seventh control valve 17, the cleaning pump 7 works, the sampling pump 5 and the water pump 16 do not work, the flushing pump 7 pumps the raw water in the raw water pipe 1 into the sampling pump 5 for reverse flushing, and the raw water after flushing is input into the raw water pipe 1 through the sampling tube 2 connected to the water inlet of the sampling pump 5 and sent to the sewage treatment plant for treatment;

[0031] 4. Filter device cleaning mode: Open the seventh control valve 17, close the first control valve 4, the second control valve 6, the third control valve 8, the fourth control valve 9, the fifth control valve 11, and the sixth control valve 13, and pump the reclaimed water in the reclaimed water storage tank 15 into the filter device 14 through the backwash pipe 18 to backwash the filter device 14, thereby ensuring the normal operation of the filter device 14. Avoid mixing a large amount of reclaimed water in the raw water.

[0032] 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 raw water sampling system for a sewage treatment plant, comprising a raw water pipeline (1) and a sampling tube (2) connecting the raw water pipeline (1) and a laboratory, wherein a first control valve (4) and a sampling pump (5) are sequentially arranged on the sampling tube (2) along the water flow direction, and characterized in that: It also comprises a flushing pipe (3), one end of which is connected to the raw water pipeline (1), a second control valve (6), a flushing pump (7), and a third control valve (8) are arranged in sequence on the flushing pipe (3) along the water flow direction, the other end of the flushing pipe (3) is connected to the water outlet of the sampling pump (5), and a fourth control valve (9) is arranged on the sampling pipe (2) between the sampling pump (5) and the laboratory.

2. The sewage treatment plant raw water sampling system according to claim 1, characterized in that: The water outlet of the flushing pump (7) is also connected to the water inlet of the sampling pump (5) through a first water pipe (10), and a fifth control valve (11) is provided on the first water pipe (10). The water outlet of the sampling pump (5) is also connected to the raw water pipeline (1) through a second water pipe (12), and a sixth control valve (13) is provided on the second water pipe (12).

3. The sewage treatment plant raw water sampling system according to claim 1, characterized in that: A filtering device (14) is provided on the flushing pipe (3) between the raw water pipeline (1) and the second control valve (6).

4. The sewage treatment plant raw water sampling system according to claim 3, characterized in that: The water outlet of the filtering device (14) is located directly above its water inlet, and the flushing pipe (3) connected to the water inlet of the filtering device (14) is arranged vertically.

5. The sewage treatment plant raw water sampling system according to claim 4, characterized in that: The filtering device (14) comprises a shell (141) and a water inlet interface (142) and a water outlet interface (143) formed at the upper and lower ends of the shell (141), and at least one layer of filter screen (144) is arranged from bottom to top in the shell (141).

6. The sewage treatment plant raw water sampling system according to claim 5, characterized in that: The pores of the filtering holes (145) of the filter screen (144) gradually decrease from bottom to top.

7. The sewage treatment plant raw water sampling system according to any one of claims 3 to 6, characterized in that: The top of the filtering device (14) is also connected to a reclaimed water storage tank (15) via a backwash pipe (18), and a water pump (16) and a seventh control valve (17) are arranged on the backwash pipe.

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