Water treatment agent testing system

Abstract

The invention discloses a water treatment agent test system which comprises a water taking unit, a test unit and a drainage unit, and the water taking unit is connected with the test unit and used for extracting a water body to be tested and conveying the water body to the test unit; the test unit comprises a chemical supply device, a chemical distribution device, a test device and a detection device, the test device is connected with the water taking unit and used for receiving a to-be-tested water body, the chemical distribution device is arranged in the test device, and the chemical supply device is connected with the chemical distribution device and used for dispersing and releasing a water treatment agent into the water body in the test device; the test device is also used for detecting physical, chemical or biological information of the water body; the detection device is connected with the test device and is used for detecting information of water flowing through the test device; the drainage unit is connected with the test device and used for draining water in the test device. According to the invention, the adding working condition of the water treatment agent in a practical engineering water conveying pipeline can be fully simulated, and the on-way diffusion rule and the action effect of the water treatment agent are obtained.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, and in particular to a water treatment agent testing system. Background Art

[0002] In order to prevent and control biological attachment in water pipes, it is often necessary to add water treatment agents for treatment. However, the treatment effect of water treatment agents is often closely related to their dispersion tendency in the water pipes, especially along the pipe walls. The diffusion and reduction of water treatment agents in the horizontal and vertical sections of the water pipes are the key factors affecting their performance along the wall.

[0003] Using test equipment to study the dispersion of water treatment agents in water pipelines is an effective means. However, there are patent documents, such as patent publication number CN

[0004] 101704567B, CN205873675U, CN208762175U, CN101993119A and CN206409235U, etc., only involve the dosing equipment of water treatment agents; such as patent publication numbers CN114397419A, CN217212642U, CN115436564A, CN

[0005] 2018028506U, CN204154721U, CN108344849A and CN1083448

[0006] 49B, etc., only involve the effect of biocides on organisms, and there is no test system suitable for studying the dispersion effect of water treatment agents along the water pipeline. As a result, the test personnel cannot correctly evaluate the dispersion effect of water treatment agents in the water pipeline after being added by the dosing equipment. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a water treatment agent testing system in view of the above-mentioned deficiencies in the prior art, which can fully simulate the injection processing conditions of the water treatment agent in the actual engineering water supply pipeline and obtain the diffusion law of the water treatment agent along the pipeline and its effect.

[0008] The technical solution of the present invention to solve the above technical problems is:

[0009] The present invention provides a water treatment agent test system, comprising a water intake unit, a test unit and a drainage unit, wherein:

[0010] The water intake unit is connected to the test unit and is used to extract the water to be tested and transport it to the test unit;

[0011] The test unit includes a drug supply device, a drug distribution device, a test device and a detection device. The test device is connected to the water intake unit and is used to receive the water to be tested. The drug distribution device is arranged in the test device. The drug supply device is connected to the drug distribution device and is used to disperse and release the water treatment agent into the water in the test device to change the physical, chemical or biological information of the water. The detection device is connected to the test device and is used to detect the information of the water flowing through the test device.

[0012] The drainage unit is connected to the test device and is used for draining the water in the test device.

[0013] Optionally, the test device comprises a test tube and a sampling tube, wherein:

[0014] The test pipe is connected to the water intake unit to receive the water to be tested;

[0015] The sampling tube penetrates the test tube in an insertion manner, one end of the sampling tube is closed, an opening is provided at the middle position, and a sampling valve is provided at the other end.

[0016] Optionally, the number of the sampling tubes is at least three groups, and each group of sampling tubes is distributed along the length direction of the test tube to collect water samples flowing through at least three cross sections in the test tube.

[0017] Optionally, the sampling tube is provided with a plurality of markings, each marking being distributed in sequence toward both ends of the sampling tube with the opening as the midpoint, so as to adjust the insertion depth of the sampling tube in the test tube.

[0018] Optionally, the markers are distributed in sequence toward both ends of the sampling tube at 1 / 4 of the inner diameter and 1 / 2 of the length of the test tube, so as to collect liquid samples flowing through at least five longitudinal sections in the test tube.

[0019] Optionally, the opening is located against the direction of water flow.

[0020] Optionally, the test device further comprises a plurality of groups of biological hanging plates, each group of biological hanging plates being arranged in the test tube and distributed in sequence along the length direction of the test tube, for obtaining biological attachment information along the length of the test tube.

[0021] Optionally, the drug distribution device is detachably arranged at the water inlet end of the test tube, and is provided with a drug inlet and a plurality of drug outlet holes. The drug inlet is connected to the drug supply device through a one-way valve, and the drug outlet holes are evenly arranged on the drug distribution device toward the center side of the test tube or the side along the water flow.

[0022] Optionally, the water intake unit includes a water intake pump and a first buffer pipeline, and the water intake pump is connected to the test device through the first buffer pipeline.

[0023] Optionally, the water intake pump is one or more of a submersible pump, a centrifugal pump, or a combination of a centrifugal pump and a vacuum pump.

[0024] Optionally, the detection device includes a flow meter, a thermometer and a water quality monitoring probe, and the flow meter, the thermometer and the water quality monitoring probe are all arranged on the first buffer pipeline;

[0025] Alternatively, the detection device includes one or more water quality detection sensors of pH, dissolved oxygen, salinity, total dissolved solids and chlorophyll a / cyanobacteria probes, which are respectively arranged on the inlet and / or outlet of the test tube in the test device, and are used to detect the pH, dissolved oxygen, salinity, total dissolved solids and chlorophyll a / cyanobacteria information of the water entering and / or flowing out of the test device;

[0026] Alternatively, the detection device includes a residual chlorine detection sensor, which is arranged on the outlet of the sampling valve and is used to detect the residual chlorine concentration information of the water body flowing out of the sampling tube.

[0027] Optionally, the system further comprises a data acquisition and control system, and the flow meter, the thermometer and the water quality monitoring probe are respectively connected to the data acquisition and control system for real-time measurement and recording of the flow rate, temperature and water quality information of the water entering the test device;

[0028] One or more water quality detection sensors in the pH, dissolved oxygen, salinity, total dissolved solids and chlorophyll a / cyanobacteria probes are also connected to the data acquisition and control system respectively to display, transmit and / or store relevant pH, dissolved oxygen, salinity, total dissolved solids and chlorophyll a / cyanobacteria information in real time;

[0029] The residual chlorine detection sensor is also connected to the data acquisition and control system respectively to display, transmit and / or store relevant residual chlorine concentration information in real time.

[0030] Optionally, the water intake unit includes a second buffer pipeline and a drain valve, wherein:

[0031] The second buffer pipeline is connected to the drainage end of the test device, and the second buffer pipeline is provided with an inverted U-shaped pipe section, and the inverted U-shaped pipe section is higher than the height of the test pipe in the test device in a horizontal position;

[0032] The drain valve is arranged in front of the second buffer pipeline and is used to drain the water in the test system when the test is finished.

[0033] The water treatment agent testing system of the present invention has at least the following beneficial effects:

[0034] (1) It can fully simulate the injection and processing of water treatment agents in actual engineering water pipelines to obtain the diffusion law of water treatment agents along the pipeline and its effect;

[0035] (2) By arranging a plurality of sampling tubes with adjustable insertion depths along the test tube, liquid sample information on different horizontal and vertical sections in the test tube can be collected and obtained;

[0036] (3) By setting up multiple groups of biological hanging plates along the test tube, the biological attachment information along the test tube can be obtained, which is convenient for the test personnel to conduct correlation analysis on the diffusion law of water treatment agents along the test tube and their effects;

[0037] (4) By setting up a biological hanging plate, it is convenient to collect and analyze biological attachment samples without the need for destructive analysis of the entire test tube;

[0038] (5) By setting up an inverted U-shaped second buffer pipeline, the drainage pipeline can be raised so that the test pipe is always in a full flow state, avoiding the situation where the large-diameter test pipe is not fully filled when the liquid flow rate is small, resulting in interference caused by unstable dispersion due to the inability to evenly release the water treatment agent into the test water body. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Schematic diagram of the structure of the water treatment agent test system in an embodiment of the present invention;

[0040] Figure 2 A schematic diagram of water flow in a water treatment agent test system according to an embodiment of the present invention;

[0041] Figure 3 is a schematic diagram of the structure of a test device in an embodiment of the present invention;

[0042] Figure 4 is a schematic diagram of the structure of a sampling tube in an embodiment of the present invention;

[0043] Figure 5 Schematic diagram of the opening in the embodiment of the present invention.

[0044] In the figure: 1-water intake unit; 11-water intake pump; 12-first buffer pipeline; 2-test unit; 21-drug supply device; 211-check valve; 22-drug distribution device; 23-test device;

[0045] 24-detection device; 3-drainage unit; 31-second buffer pipeline; 32-drainage port; 33-drain valve; 4-data acquisition and control system; 5-test tube; 51-sampling tube; 511-label; 512-opening; 513-sampling valve. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention.

[0047] In view of the problem that there is no test system suitable for studying the dispersion effect of water treatment agents along the water pipeline in the prior art, which results in the inability of test personnel to correctly evaluate the dispersion effect of water treatment agents in the water pipeline after being added by a dosing device, the present invention provides a water treatment agent test system, including a water intake unit, a test unit and a drainage unit, wherein:

[0048] The water intake unit is connected to the test unit and is used to extract the water to be tested and transport it to the test unit;

[0049] The test unit includes a drug supply device, a drug distribution device, a test device and a detection device. The test device is connected to the water intake unit and is used to receive the water to be tested delivered by the water intake unit. The drug distribution device is arranged in the test device. The drug supply device is connected to the drug distribution device and is used to disperse and release the water treatment agent into the water in the test device to change the physical, chemical or biological information of the water. The detection device is connected to the test device and is used to detect the information of the water flowing through the test device.

[0050] The drainage unit is connected to the test device and is used for draining the water in the test device.

[0051] Example 1

[0052] like Figure 1-Figure 5 As shown, this embodiment discloses a water treatment agent test system, including a water intake unit 1, a test unit 2 and a drainage unit 3, wherein:

[0053] The water intake unit 1 is connected to the test unit 2 and is used to extract the water to be tested and transport it to the test unit;

[0054] The test unit 2 includes a drug supply device 21, a drug distribution device 22, a test device 23 and a detection device 24. The test device 23 is connected to the water intake unit 1 and is used to receive the water body to be tested delivered by the water intake unit. The drug distribution device 22 is arranged in the test device 23. The drug supply device 21 is connected to the drug distribution device 22 and is used to disperse and release the water treatment agent into the water body in the test device to change the physical, chemical or biological information of the water body. The detection device 24 is connected to the test device 23 and is used to detect the information of the water body flowing through the test device.

[0055] The drainage unit 3 is connected to the test device 23 and is used to drain the water in the test device.

[0056] Specifically, the water treatment agent can be a variety of chemicals used to treat liquids, such as disinfectants or biological agents, but not limited to these; the water body to be tested can be polluted water or natural water (including river water, lake water or sea water, etc.), but not limited to these.

[0057] In some embodiments, the water treatment agent can be a biocide used to disinfect fouling organisms in the test water body, and the water treatment agent test system can be used to test the diffusion law of the biocide at a specific dose in the water pipeline under specific liquid flow rate and temperature conditions.

[0058] In some embodiments, the test device 23 includes a test tube 5 and a sampling tube 51, wherein: the test tube 5 is connected to the water intake unit 1 to receive the water to be tested delivered by the water intake unit; the sampling tube 51 penetrates the test tube 5 in an inserted manner, one end of the sampling tube 51 is closed, an opening 512 is provided in the middle position, and a one-way sampling valve 513 is provided at the other end, and the water flowing through the test tube enters the sampling tube through the opening.

[0059] In some more specific embodiments, the sampling tube 51 is vertically inserted into the test tube 5, with its top end closed and the sampling valve 513 disposed at the bottom. Water flowing through the test tube flows through the opening to the bottom sampling valve to collect water samples.

[0060] In some embodiments, the number of sampling tubes 51 is at least three groups, and each group of sampling tubes 51 is distributed along the length direction of the test tube 5 (i.e., arranged along the length) to collect water samples flowing through at least three cross sections in the test tube, that is, horizontal multi-point sampling and detection is adopted to facilitate test personnel to obtain the along-the-way reduction information of the water treatment agent in the test tube 5.

[0061] In some embodiments, a plurality of marks 511 are provided on the sampling tube 51, and each mark 511 is distributed in sequence toward both ends of the sampling tube 51 with the opening 512 as the midpoint, and the direction of the opening is marked, so that the insertion depth of the sampling tube in the test tube can be adjusted according to the mark, and then the direction and position of the opening in the test tube can be adjusted to collect liquid samples flowing through different longitudinal sections in the test tube, that is, longitudinal multi-point sampling and detection is adopted, which is convenient for test personnel to obtain radial diffusion information of the water treatment agent in the test tube 5.

[0062] In some more specific embodiments, the markers 511 are distributed in sequence toward both ends of the sampling tube 51 at 1 / 4 of the inner diameter and 1 / 2 of the length of the test tube 5, so as to collect liquid samples flowing through at least five longitudinal sections in the test tube.

[0063] In some embodiments, the opening 512 is located in the reverse direction of the water flow of the sampling tube 51, that is, facing the opening on the water flow side (such as Figure 5 As shown), compared with the holes on both sides of the sampling tube 51 or on the side facing away from the water flow, firstly, the tube can be fully filled with water samples, and secondly, the water samples received are ensured to be the water samples at the opening position, thereby realizing fixed-point sampling.

[0064] In some embodiments, the test device 23 also includes several groups of biological hanging plates (not shown in the figure), each group of biological hanging plates is arranged in the test tube 5 and distributed in sequence along the length direction of the test tube 5, and is used to obtain biological attachment information along the test tube.

[0065] In some embodiments, the medicine dispensing device 22 is detachably arranged at the water inlet end of the test tube 5 by means of a snap or the like. The type of the medicine dispensing device 22 is designed according to the specifications of the test tube, and is provided with a medicine inlet and a plurality of medicine outlet holes (not shown in the figure). The medicine inlet is arranged at the geometric center of the medicine dispensing device 22, but is not limited thereto. It can also be arranged at any other position such as the bottom or the top of the medicine dispensing device 22. The medicine inlet is connected to the metering pump outlet of the medicine supply device through a one-way valve. A plurality of medicine outlet holes are evenly arranged on the medicine dispensing device toward the center side of the test tube 5 or along the water flow side, so that the water treatment agent can be dispersed as evenly as possible in the water flow.

[0066] In some embodiments, the water intake unit 1 includes a water intake pump 11 and a first buffer pipeline 12 , and the water intake pump 11 is connected to the water inlet end of the test tube 5 in the test device 23 through the first buffer pipeline 12 .

[0067] In some more specific embodiments, the first buffer line 12 is made of a metal or non-metal hose to facilitate the removal and installation of the test tube.

[0068] In some more specific embodiments, the water intake pump 11 is one or more of a submersible pump or a centrifugal pump or a combination of a centrifugal pump and a vacuum pump, wherein the submersible pump or the centrifugal pump is preferably used to pump water bodies with a smaller suction range, and the combination of a centrifugal pump and a vacuum pump is preferably used to pump water bodies with a larger suction range.

[0069] In some embodiments, the test device 23 is provided with an external bracket, and the bracket of the test device 23, the first buffer line 12, and the drainage unit 3 are of split design and movable design to facilitate the disassembly and removal of the test tube 5, thereby facilitating the replacement of the medicine dispensing device 22.

[0070] In the water treatment test system of this embodiment, the detection device 24 can be a variety of detection devices according to test requirements, and the specific arrangement position can also be changed.

[0071] In some embodiments, the detection device 24 may include a flow meter, a thermometer and a water quality monitoring probe (not shown in the figure), and the flow meter, thermometer and water quality monitoring probe are all arranged on the first buffer line 12. Specifically, they are arranged between the outlet of the first buffer line 12 and the water inlet end of the test tube 5 in the test device 23 to detect the flow rate, temperature, water quality and other information of the water body entering the test device, that is, only the raw water information before the chemical treatment is obtained.

[0072] In some embodiments, the system may also include a data acquisition and control system (not shown in the figure), and detection devices 24 such as flow meters, thermometers and water quality monitoring probes are respectively connected to the data acquisition and control system to display, transmit and / or store relevant flow, temperature, water quality and other information in real time.

[0073] In other embodiments, the detection device 24 may also include a variety of water quality detection sensors (not shown in the figure) such as pH, dissolved oxygen, salinity, total dissolved solids and chlorophyll a / cyanobacteria probes. These water quality detection sensors are respectively arranged on the inlet and / or outlet of the test tube 5 in the test device 23, specifically, they are respectively arranged on the first buffer line 12 and / or the second buffer line 31 in the drainage unit 3, and are used to detect the pH, dissolved oxygen, salinity, total dissolved solids and chlorophyll a / cyanobacteria and other information of the water body entering and / or flowing out of the test device 23, so as to obtain the impact of the chemical treatment on the water quality.

[0074] In addition, various water quality detection sensors such as pH, dissolved oxygen, salinity, total dissolved solids and chlorophyll a / cyanobacteria probes can also be connected to the data acquisition and control system respectively to display, transmit and / or store relevant pH, dissolved oxygen, salinity, total dissolved solids and chlorophyll a / cyanobacteria information in real time.

[0075] In some other embodiments, the detection device 24 may further include a residual chlorine detection sensor (not shown in the figure), which is disposed at the outlet of the sampling valve 515 and is used to detect the residual chlorine concentration information of the water flowing out of the sampling tube.

[0076] In addition, the residual chlorine detection sensor can also be connected to the data acquisition and control system respectively to display, transmit and / or store relevant residual chlorine concentration information in real time.

[0077] In this embodiment, online detection can be achieved through the detection device 24, and by providing a sampling tube 51, samples can be collected for offline detection through other portable or laboratory instruments.

[0078] In some embodiments, in order to control the flow and speed of water entering the test system, the water pump 11 is connected to the data acquisition and control system 4, and the speed of the water pump 11 is adjusted by the data acquisition and control system to control the flow and speed of the extracted water.

[0079] Specifically, the water intake pump 11 is coupled to the flow meter in the detection device 24 through the data acquisition and control system, so that the data acquisition and control system can automatically adjust the rotation speed of the water intake pump 11 according to the real-time flow of the water body entering the test device 23, so that during the test, the flow of the water body entering the test device can be maintained at a stable value without being affected by the fluctuation of the water level of the water body to be tested.

[0080] In some embodiments, the water intake unit 1 includes a second buffer line 31 and a drain valve 33, wherein: the water inlet of the second buffer line 31 is connected to the drain end of the test tube 5 in the test device 23, and the second buffer line 31 preferably adopts an inverted U-shaped design, that is, the second buffer line 31 is provided with an inverted U-shaped pipe section, and the highest point of the inverted U-shaped pipe section is higher than the height of the test tube 5 in the test device 23 in a horizontal position to ensure that the water in the test tube is always in a full flow state during all test flow rate operations, and the height of the drain port 32 of the second buffer line 31 is lower than the height of the test tube 5 to facilitate smooth drainage; the drain valve 33 is arranged in front of the second buffer line 31, that is, between the drain end of the test tube 5 in the test device 23 and the water inlet of the second buffer line 31, and is used to drain the water in the test system at the end of the test. During the test, the drain valve is in a closed state, and after the test, the drain valve is opened to discharge the liquid in the test unit.

[0081] In some embodiments, in order to facilitate test personnel to discharge the liquid in the test system after the test, a drain valve can also be provided on the first buffer pipeline before the inlet of the water pump 11 to discharge the water in the water pump 11 and the first buffer pipeline at the end of the test.

[0082] The water treatment agent test system of this embodiment, when in use:

[0083] like Figure 2 As shown, the water pump 11 draws the water to be tested, enters the test pipe in the test unit 2 through the first buffer pipeline 12, and then reaches the drain port 32 through the second buffer pipeline 31 to be discharged.

[0084] like Figure 3 As shown, when the water passes through the test tube 5, the water treatment agent quantitatively extracted from the medicine storage box by the medicine supply device 21 through the metering pump is released into the water passing through the test tube 5 through the medicine distribution device 22 and reacts with the water to change the physical, chemical or biological information of the liquid, thereby fully simulating the injection processing of the water treatment agent in the actual engineering water pipeline; the water mixed with the water treatment agent enters the sampling tube 51 through the opening 512 on the sampling tube 51, and is then collected through the sampling valve 513, so that the test personnel can analyze the water mixed with the water treatment agent, and then obtain the diffusion law of the water treatment agent along the way and its effect.

[0085] During the test, if Figure 4 As shown, by adjusting the insertion depth of the sampling tube 51 in the test tube 5 and controlling the direction of the opening, liquid samples on different longitudinal sections in the test tube 5 can be collected, which is convenient for test personnel to obtain radial diffusion information of the water treatment agent in the test tube 5; through a plurality of sampling tubes 51 arranged along the way, water samples on different cross sections in the test tube 5 can be collected, which is convenient for obtaining the along-the-way dissipation information of the water treatment agent in the test tube 5.

[0086] When the water treatment agent is released into the water body, it will flow with the flow of the water body and diffuse under the action of hydraulic force. When the water body flows in the water treatment agent test system, the substances it carries (such as seaweed, fouling organisms, etc.) will flow with the flow of the water body, and will react after contacting the water treatment agent, thereby changing the original information of the liquid and the water treatment agent. For example, because the seaweed is killed, the number of chlorophyll a and cyanobacteria cells in the liquid will change. For example, the water treatment agent is consumed by killing seaweed and other organisms, and the water treatment agent content in the water body will be reduced beyond the hydraulic diffusion, which will eventually lead to a change in the water treatment agent content in the water body and can be detected through experiments. Based on the above test results, the test personnel can analyze the diffusion law and effect of the water treatment agent in the water pipeline.

[0087] In summary, the water treatment agent testing system of this embodiment has at least the following beneficial effects:

[0088] (1) It can fully simulate the injection and processing of water treatment agents in actual engineering water pipelines to obtain the diffusion law of water treatment agents along the pipeline and its effect;

[0089] (2) By arranging a plurality of sampling tubes with adjustable insertion depths along the test tube, liquid sample information on different horizontal and vertical sections in the test tube can be collected and obtained;

[0090] (3) By setting up multiple groups of biological hanging plates along the test tube, the biological attachment information along the test tube can be obtained, which is convenient for the test personnel to conduct correlation analysis on the diffusion law of water treatment agents along the test tube and their effects;

[0091] (4) By setting up a biological hanging plate, it is convenient to collect and analyze biological attachment samples without the need for destructive analysis of the entire test tube;

[0092] (5) By setting up an inverted U-shaped second buffer pipeline, the drainage pipeline can be raised so that the test pipe is always in a full flow state, avoiding the situation where the large-diameter test pipe is not fully filled when the liquid flow rate is small, resulting in interference caused by unstable dispersion due to the inability to evenly release the water treatment agent into the test water body.

[0093] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A water treatment agent testing system, characterized in that: It includes water intake unit, test unit and drainage unit, among which: The water intake unit is connected to the test unit and is used to extract the water to be tested and transport it to the test unit; The test unit includes a drug supply device, a drug distribution device, a test device and a detection device. The test device is connected to the water intake unit and is used to receive the water to be tested. The drug distribution device is arranged in the test device. The drug supply device is connected to the drug distribution device and is used to disperse and release the water treatment agent into the water in the test device to change the physical, chemical or biological information of the water. The detection device is connected to the test device and is used to detect the information of the water flowing through the test device. The drainage unit is connected to the test device and is used for draining the water in the test device.

2. The water treatment agent testing system according to claim 1, characterized in that: The test device comprises a test tube and a sampling tube, wherein: The test pipe is connected to the water intake unit to receive the water to be tested; The sampling tube penetrates the test tube in an insertion manner, one end of the sampling tube is closed, an opening is provided at the middle position, and a sampling valve is provided at the other end.

3. The water treatment agent testing system according to claim 2, characterized in that: The number of the sampling tubes is at least three groups, and each group of sampling tubes is distributed along the length direction of the test tube to collect water samples flowing through at least three cross sections in the test tube.

4. The water treatment agent testing system according to claim 2, characterized in that: The sampling tube is provided with a plurality of marks, each mark is distributed in sequence toward both ends of the sampling tube with the opening as the midpoint, so as to adjust the insertion depth of the sampling tube in the test tube.

5. The water treatment agent testing system according to claim 4, characterized in that: The marks are distributed in sequence toward both ends of the sampling tube at 1 / 4 of the inner diameter and 1 / 2 of the length of the test tube, so as to collect liquid samples flowing through at least five longitudinal sections in the test tube.

6. The water treatment agent testing system according to claim 2, characterized in that: The opening is located in the direction opposite to the water flow.

7. The water treatment agent testing system according to claim 2, characterized in that: The test device also includes several groups of biological hanging plates. Each group of biological hanging plates is arranged in the test tube and distributed in sequence along the length direction of the test tube, so as to obtain the biological attachment information along the test tube.

8. The water treatment agent testing system according to claim 2, characterized in that: The drug distribution device is detachably arranged at the water inlet end of the test tube, and is provided with a drug inlet and a plurality of drug outlet holes. The drug inlet is connected to the drug supply device through a one-way valve, and the drug outlet holes are evenly arranged on the drug distribution device toward the center side of the test tube or the side along the water flow.

9. The water treatment agent testing system according to any one of claims 1 to 8, characterized in that: The water intake unit comprises a water intake pump and a first buffer pipeline, and the water intake pump is connected to the test device through the first buffer pipeline.

10. The water treatment agent testing system according to claim 9, characterized in that: The water intake pump is one or more of a submersible pump, a centrifugal pump, or a combination of a centrifugal pump and a vacuum pump.

11. The water treatment agent testing system according to claim 9, characterized in that: The detection device includes a flow meter, a thermometer and a water quality monitoring probe, and the flow meter, the thermometer and the water quality monitoring probe are all arranged on the first buffer pipeline; or, The detection device comprises one or more water quality detection sensors of pH, dissolved oxygen, salinity, total dissolved solids and chlorophyll a / cyanobacteria probes, which are respectively arranged on the inlet and / or outlet of the test tube in the test device, and are respectively used to detect the pH, dissolved oxygen, salinity, total dissolved solids and chlorophyll a / cyanobacteria information of the water body entering and / or flowing out of the test device; or, The detection device comprises a residual chlorine detection sensor, which is arranged on the outlet of the sampling valve and is used to detect the residual chlorine concentration information of the water body flowing out of the sampling tube.

12. The water treatment agent testing system according to claim 11, characterized in that: The system also includes a data acquisition and control system, The flow meter, the thermometer and the water quality monitoring probe are respectively connected to the data acquisition and control system, and are used to measure and record the flow rate, temperature and water quality information of the water entering the test device in real time; One or more water quality detection sensors in the pH, dissolved oxygen, salinity, total dissolved solids and chlorophyll a / cyanobacteria probes are also connected to the data acquisition and control system respectively to display, transmit and / or store relevant pH, dissolved oxygen, salinity, total dissolved solids and chlorophyll a / cyanobacteria information in real time; The residual chlorine detection sensor is also connected to the data acquisition and control system respectively to display, transmit and / or store relevant residual chlorine concentration information in real time.

13. The water treatment agent testing system according to claim 9, characterized in that: The water intake unit includes a second buffer pipeline and a drain valve. The second buffer pipeline is connected to the drainage end of the test device, and the second buffer pipeline is provided with an inverted U-shaped pipe section, and the inverted U-shaped pipe section is higher than the height of the test pipe in the test device in a horizontal position; The drain valve is arranged in front of the second buffer pipeline and is used to drain the water in the test system when the test is finished.

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