Membrane pool water treatment system

Abstract

The utility model relates to the technical field of water treatment, in particular to a membrane pool water treatment system which comprises a membrane pool provided with a plurality of galleries, a medicament storage tank, a dosing pump, a dosing main pipeline, a plurality of branch pipelines and a controller, water inlet flow meters are arranged at the water inlet ends of the galleries; a first flow regulating valve is arranged on each branch pipeline; and the water inlet flow meter, the first flow regulating valve and the dosing pump are all in signal connection with the controller. According to the utility model, the defect in the prior art that the dosage cannot be respectively and accurately added manually according to the actual water quantity of each gallery is overcome, and the actual water quantity of the gallery can be measured by the water inlet flow meter, the medicament storage tank, the dosing pump, the first flow regulating valve and the controller; the controller can control the start and stop of the dosing pump and the opening degree of the first flow regulating valve according to the actual water quantity, so that the dosing amount of the medicament in each gallery is accurately controlled, the medicament is prevented from being excessive or insufficient, the flocculation effect can be ensured, the waste of the medicament can be avoided, and the medicament cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and more specifically, to a membrane tank water treatment system. Background Technology

[0002] Membrane tank water treatment systems are systems that utilize membrane separation technology for water purification and treatment. They are widely used in drinking water treatment, sewage treatment, and industrial wastewater treatment. For example, an existing anaerobic biofilm hydrolysis reactor and wastewater treatment system is disclosed. The reactor is equipped with an acetic acid inlet, a wastewater inlet, a sludge inlet, a water outlet, and a sludge outlet. The reactor has a multi-corridor structure, which is divided into multiple interconnected corridors by corridor partition walls. Each corridor is equipped with multiple main air inlets, multiple branch air inlets, multiple rotary cross-flow aerators, packing material, and packing material supports.

[0003] Aluminum sulfate is mainly used as a coagulant in membrane water treatment systems. Through charge neutralization, adsorption, and flocculation, it removes suspended solids, colloids, and some organic matter from the water, improving membrane filtration efficiency and effluent quality. Properly controlling the dosage of aluminum sulfate can enhance the operational performance and stability of the membrane water treatment system.

[0004] Traditional aluminum sulfate dosing methods typically involve manual control, which makes it impossible to accurately add the dosage based on the actual water volume in each channel of the membrane tank. This results in uneven dosing and affects the water treatment effect. Utility Model Content

[0005] To address the problem in the existing technology that manual addition of chemicals cannot accurately determine the actual water volume in each channel, this invention provides a membrane tank water treatment system that can automatically add accurate amounts of chemicals based on the actual water volume in each channel, reducing chemical waste and improving water treatment efficiency.

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0007] A membrane tank water treatment system includes a membrane tank with multiple channels, a chemical storage tank, a dosing pump, a main dosing pipeline, and multiple branch pipelines. The inlet end of the main dosing pipeline is connected to the chemical storage tank, and the dosing pump is installed on the main dosing pipeline. The inlet ends of the multiple branch pipelines are all connected to the outlet end of the main dosing pipeline, and the outlet ends of the multiple branch pipelines are connected to each of the multiple channels. Each channel is equipped with an inlet flow meter. Each branch pipeline is equipped with a first flow regulating valve. The system also includes a controller. The inlet flow meter, the first flow regulating valve, and the dosing pump are all signal-connected to the controller.

[0008] It is understandable that the water inlet of the corridor can refer to the water inlet of the corridor or the water inlet pipe connected to the water inlet of the corridor. Water is distributed to different corridors through the water inlet pipe.

[0009] In the above technical solution, the actual water volume in the corridor can be determined by measuring the inflow rate. After measuring the inflow rate, the inflow meter sends the data to the controller. The controller then controls the start / stop of the dosing pump and the opening of the first flow regulating valve based on the actual water volume in the corridor. This allows the aluminum sulfate in the chemical storage tank to flow through the main dosing pipeline into each branch pipeline, and finally into different corridors. Because the opening of the first flow regulating valve on each branch pipeline is different, the amount of aluminum sulfate added to each corridor is also different, thus achieving precise control of the chemical dosage in each corridor. The controller accurately controls the aluminum sulfate dosage in each corridor based on the actual water volume, avoiding excessive or insufficient dosage. This not only ensures the flocculation effect but also prevents chemical waste and saves on chemical costs.

[0010] Preferably, each branch pipe is equipped with a chemical flow meter, and each flow meter is connected to the controller via a signal connection. The flow meters can measure the actual amount of aluminum sulfate added to each branch pipe in real time and feed the measured flow rate back to the controller. Based on the feedback signal, the controller dynamically adjusts the opening of the first flow regulating valve and the operating status of the dosing pump, thereby precisely adjusting the chemical dosage in each corridor. Adding flow meters enables closed-loop control of the chemical dosing, improving the system's control accuracy.

[0011] Because aluminum sulfate crystals easily form in branch pipes after prolonged use, leading to pipe blockage and ultimately affecting the normal operation of the system, the system preferably also includes a cleaning agent storage tank, a backwash pump, and a flushing pipe. The inlet end of the flushing pipe is connected to the cleaning agent storage tank, and the backwash pump is installed on the flushing pipe; all branch pipes are connected to the flushing pipe. The cleaning agent storage tank can store cleaning agents such as sodium hydroxide, which is a strong alkali and can effectively remove aluminum sulfate crystals. When the crystal thickness in the branch pipe reaches a certain level, the backwash pump can be turned on to pump sodium hydroxide from the cleaning agent storage tank to the flushing pipe, which then delivers the sodium hydroxide to each branch pipe to flush and remove it from the inner wall of the branch pipe.

[0012] Preferably, the outlet end of the flushing pipe is connected to the main dosing pipe. The flushing pipe delivers sodium hydroxide to the main dosing pipe, which then distributes the sodium hydroxide to each branch pipe. This eliminates the need to install additional pipes to connect each branch pipe to the flushing pipe.

[0013] Preferably, each branch pipe is equipped with a thickness detector, which is connected to the controller via a signal connection. The thickness detector monitors the thickness of crystals within the branch pipe in real time. When the detected crystal thickness exceeds a set threshold, it sends a signal to the controller, which then activates the backwash pump upon receiving the signal. The thickness detector facilitates timely detection of crystallization problems, preventing excessive crystal thickness from causing pipe blockage or equipment damage.

[0014] The thickness detector can be an ultrasonic detector, a radiation detector (only useful for metal pipes), an electromagnetic detector, etc. Preferably, the thickness detector is an ultrasonic thickness detector. Ultrasonic thickness detectors utilize the propagation characteristics of ultrasound in a medium to calculate the thickness of the crystal by measuring the time difference of the reflected wave. Compared to other types of detectors, ultrasonic thickness detectors have higher measurement accuracy and lower cost.

[0015] Preferably, the system also includes an alarm, which is signal-connected to the controller. When the thickness detector detects that the crystal thickness within the branch pipe exceeds a set threshold, the controller activates the alarm.

[0016] Preferably, the system further includes a water tank, a water delivery pipe, a greywater pump, and a pipe mixer. The inlet end of the water delivery pipe is connected to the water tank. The greywater pump is installed on the water delivery pipe and is signal-connected to the controller. The outlet end of the water delivery pipe is connected to the flushing pipe and located on the outlet side of the backwash pump. The pipe mixer is installed on the flushing pipe and located between the outlet end of the water delivery pipe and the branch pipe. In implementation, the backwash pump is turned on to pump sodium hydroxide from the cleaning agent storage tank to the pipe mixer. Simultaneously, the greywater pump is turned on to pump water from the water tank to the pipe mixer, mixing sodium hydroxide and water at a ratio of 1:20 in the pipe mixer. The diluted sodium hydroxide solution flows from the pipe mixer to the main dosing pipe and finally into each branch pipe to clean the aluminum sulfate crystals within the branch pipes. After rinsing the crystals from the branch pipes, the backwash pump is turned off, while the greywater pump remains running for 5 minutes to pump clean water and remove any remaining sodium hydroxide from the pipes, preventing any impact on the quality of the subsequent produced water. Sodium hydroxide is diluted in a specific ratio before being introduced into the branch pipe, thus eliminating the need for manual preparation of sodium hydroxide dilution solution. This also avoids the problem of excessively high sodium hydroxide solution concentration corroding the branch pipe or excessively low concentration leading to ineffective cleaning.

[0017] Preferably, the system further includes a second flow regulating valve, which is disposed on the flushing pipe and signal-connected to the controller. The second flow regulating valve is located between the outlet end of the water supply pipe and the pipe mixer. By adjusting the opening of the second flow regulating valve, the pumping rate of sodium hydroxide and clean water can be adjusted, thereby eliminating the need for frequent start-stop of the backwash pump and the greywater pump.

[0018] Preferably, each of the corridors is equipped with a membrane module; it also includes a permeate collection pipe and a permeate pump. The permeate collection pipe has multiple inlet ends, and the outlet ends of the membrane modules are connected to the inlet ends of the permeate collection pipe one by one; the permeate pump is mounted on the permeate collection pipe and is signal-connected to the controller. It is understood that the membrane modules, located within the corridor, are used to filter permeate, and the permeate pump is used to draw the permeate from the membrane modules. The membrane modules, permeate collection pipes, and permeate pumps are all prior art; therefore, this specification will not describe their specific structures and working principles in detail.

[0019] The beneficial effects of this utility model are:

[0020] 1. By setting up an inlet flow meter, a chemical storage tank, a dosing pump, a first flow regulating valve, and a controller, the inlet flow meter can measure the actual water volume in the corridor. The controller can control the start and stop of the dosing pump and the opening of the first flow regulating valve according to the actual water volume, thereby accurately controlling the amount of chemical added to each corridor and avoiding excessive or insufficient chemical addition. This not only ensures the flocculation effect but also avoids chemical waste and saves chemical costs.

[0021] 2. Install an ultrasonic thickness detector, a cleaning agent storage tank, and a backwash pump. The ultrasonic thickness detector can detect the crystal thickness in the branch pipe. When the crystal thickness reaches the set value, the controller can control the backwash pump to start, thereby delivering the cleaning agent in the cleaning agent storage tank to the branch pipe to flush the crystal and avoid excessive crystal thickness that could cause pipe blockage or equipment damage.

[0022] 3. It is also equipped with a water tank, a medium-water pump and a pipeline mixer. When the medium-water pump and the backwash pump are turned on at the same time, the cleaning agent in the cleaning agent storage tank and the water in the water tank can be pumped to the pipeline mixer to mix. The mixed liquid is used to rinse the crystals in the branch pipes without the need for manual dilution of the cleaning agent in advance. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a first embodiment of a membrane tank water treatment system;

[0024] Figure 2 This is a schematic diagram of a second embodiment of a membrane pool water treatment system;

[0025] Figure 3 This is a structural schematic diagram of a third embodiment of a membrane pool water treatment system.

[0026] Figures 1 to 3 The dashed lines in the diagram represent signal feedback lines or control lines, and the arrows all point in the direction of liquid flow.

[0027] In the attached diagram: 1-corridor; 2-chemical storage tank; 3-dosing pump; 4-main dosing pipeline; 5-branch pipeline; 6-inlet flow meter; 7-first flow regulating valve; 8-controller; 9-chemical flow meter; 10-cleaning agent storage tank; 11-backwash pump; 12-flushing pipeline; 13-thickness detector; 14-water tank; 15-water delivery pipeline; 16-reclaimed water pump; 17-pipeline mixer; 18-second flow regulating valve; 19-collecting pipe; 20-product water pump. Detailed Implementation

[0028] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0029] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0030] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0031] Example 1

[0032] This embodiment is a first embodiment of a membrane tank water treatment system, such as Figure 1 As shown, the system includes a membrane tank (not shown) with four channels 1, a reagent storage tank 2 containing aluminum sulfate, a dosing pump 3, a main dosing pipeline 4, and four branch pipelines 5. The inlet end of the main dosing pipeline 4 is connected to the reagent storage tank 2, and the dosing pump 3 is installed on the main dosing pipeline 4. The inlet ends of the four branch pipelines 5 are all connected to the outlet ends of the main dosing pipeline 4, and the outlet ends of the four branch pipelines 5 are connected to the four channels 1 one by one. Each channel 1 is equipped with an inlet flow meter 6. Each branch pipeline 5 is equipped with a first flow regulating valve 7, which is an electric valve. The system also includes a controller 8, which is a PLC controller. The inlet flow meter 6, the first flow regulating valve 7, and the dosing pump 3 are all signal connected to the controller 8.

[0033] Furthermore, each branch pipe 5 is equipped with a chemical flow meter 9, which is connected to the controller 8. The chemical flow meter 9 can measure the actual amount of aluminum sulfate added in each branch pipe 5 in real time and feed the measured chemical flow rate back to the controller 8. The controller 8 dynamically adjusts the opening of the first flow regulating valve 7 and the operating status of the dosing pump 3 based on the feedback signal, thereby accurately adjusting the chemical dosage in each corridor 1. The addition of the chemical flow meter 9 enables closed-loop control of chemical dosing and improves the control accuracy of the system.

[0034] Furthermore, each corridor 1 is equipped with a membrane module (not shown in the figure); it also includes a permeate collection pipe 19 and a permeate pump 20. The permeate collection pipe 19 has multiple inlet ends, and the outlet ends of the membrane modules are connected to the inlet ends of the permeate collection pipe 19 one by one; the permeate pump 20 is installed on the permeate collection pipe 19 and is signal-connected to the controller 8. It can be understood that the membrane modules located in the corridor 1 are used to filter permeate, and the permeate pump 20 is used to draw out the permeate from the membrane modules. The membrane modules, permeate collection pipe 19, and permeate pump 20 are all prior art, therefore, their specific structures and working principles will not be described in detail in this specification.

[0035] The working principle or workflow of this embodiment is as follows: By measuring the inflow rate of corridor 1, the actual water volume in corridor 1 can be determined. After the inflow rate of corridor 1 is measured by the inflow meter 6, the data is sent to the controller 8. The controller 8 then controls the start and stop of the dosing pump 3 and the opening degree of the first flow regulating valve 7 according to the actual water volume in corridor 1, so that the aluminum sulfate in the chemical storage tank 2 flows into each branch pipe 5 through the main dosing pipe 4 and finally enters different corridors 1. Since the opening degree of the first flow regulating valve 7 on each branch pipe 5 is different, the dosage of chemical added to each corridor 1 is also different, thereby achieving precise control of the dosage of chemical added to each corridor 1.

[0036] The beneficial effects of this embodiment are as follows: By setting up an inlet flow meter, a chemical storage tank, a dosing pump, a first flow regulating valve, and a controller, the inlet flow meter can measure the actual water volume in the corridor, and the controller can control the start and stop of the dosing pump and the opening of the first flow regulating valve according to the actual water volume, thereby accurately controlling the amount of chemical added to each corridor, avoiding excessive or insufficient chemical addition, which not only ensures the flocculation effect, but also avoids chemical waste and saves chemical costs.

[0037] Example 2

[0038] This embodiment is a second embodiment of a membrane tank water treatment system. This embodiment is similar to Embodiment 1, except that, as shown in the following... Figure 2As shown, the system also includes a cleaning agent storage tank 10, a backwash pump 11, and a flushing pipe 12. The inlet end of the flushing pipe 12 is connected to the cleaning agent storage tank 10, and the backwash pump 11 is installed on the flushing pipe 12. All branch pipes 5 are connected to the flushing pipe 12. The cleaning agent storage tank 10 can store cleaning agents such as sodium hydroxide. Sodium hydroxide is a strong alkali and can effectively remove aluminum sulfate crystals. When the thickness of the crystals in the branch pipes 5 reaches a certain level, the backwash pump 11 can be turned on to pump the sodium hydroxide from the cleaning agent storage tank 10 to the flushing pipe 12. The flushing pipe 12 then delivers the sodium hydroxide to each branch pipe 5 to flush and remove the crystals from the inner wall of the branch pipes 5.

[0039] Furthermore, the outlet end of the flushing pipe 12 is connected to the main dosing pipe 4 and is located between the dosing pump 3 and the branch pipes 5. The flushing pipe 12 delivers sodium hydroxide to the main dosing pipe 4, which then distributes the sodium hydroxide to each branch pipe 5. This eliminates the need to install additional pipes to connect each branch pipe 5 to the flushing pipe 12.

[0040] Furthermore, each branch pipe 5 is equipped with a thickness detector 13, which is connected to the controller 8. The thickness detector 13 monitors the thickness of crystals in the branch pipe 5 in real time. When the detected crystal thickness exceeds a set threshold, it sends a signal to the controller 8. Upon receiving the signal, the controller 8 controls the backwash pump 11 to open. The thickness detector 13 facilitates timely detection of crystallization problems and prevents excessive crystal thickness from causing pipe blockage or equipment damage.

[0041] Specifically, the thickness detector 13 is an ultrasonic thickness detector. The ultrasonic thickness detector utilizes the propagation characteristics of ultrasound waves in a medium to calculate the thickness of the crystal by measuring the time difference of the reflected waves. Compared to other types of detectors, the ultrasonic thickness detector has higher measurement accuracy and lower cost.

[0042] Furthermore, an alarm (not shown in the figure) is also included, which is signal-connected to the controller 8. When the thickness detector 13 detects that the crystal thickness in the branch pipe 5 exceeds a set threshold, the controller 8 controls the alarm to sound an alarm.

[0043] Other features, working principles, and beneficial effects of this embodiment are the same as those of Embodiment 1.

[0044] Example 3

[0045] This embodiment is a third embodiment of a membrane tank water treatment system. This embodiment is similar to embodiment 2, except that, as Figure 3As shown, the system also includes a water tank 14, a water delivery pipe 15, a secondary water pump 16, and a pipe mixer 17. The inlet end of the water delivery pipe 15 is connected to the water tank 14. The secondary water pump 16 is installed on the water delivery pipe 15 and is signal-connected to the controller 8. The outlet end of the water delivery pipe 15 is connected to the flushing pipe 12 and is located on the outlet side of the backwash pump 11. The pipe mixer 17 is installed on the flushing pipe 12 and is located between the outlet end of the water delivery pipe 15 and the branch pipe 5. In practice, the controller 8 controls the backwash pump 11 to start, thereby pumping the sodium hydroxide in the cleaning agent storage tank 10 to the pipe mixer 17. At the same time, the controller 8 controls the secondary water pump 16 to start, thereby pumping the water in the water tank 14 to the pipe mixer 17, so that the sodium hydroxide and water are mixed in the pipe mixer 17 at a ratio of 1:20. The diluted sodium hydroxide solution flows out from the pipe mixer 17 to the main dosing pipe 4, and finally flows into each branch pipe 5 to clean the aluminum sulfate crystals in the branch pipe 5. After rinsing away the crystals in branch pipe 5, first turn off backwash pump 11, then keep reclaimed water pump 16 running for 5 minutes to pump clean water and clean away any remaining sodium hydroxide in the pipe, thus avoiding affecting the quality of subsequent produced water. The sodium hydroxide is diluted according to a specific ratio before being introduced into branch pipe 5, eliminating the need for manual preparation of the sodium hydroxide dilution solution. This also avoids the problem of excessively high sodium hydroxide solution concentration corroding branch pipe 5 or excessively low concentration leading to ineffective cleaning.

[0046] Furthermore, a second flow regulating valve 18 is included. The second flow regulating valve 18 is a solenoid valve, which is installed on the flushing pipe 12 and signal-connected to the controller 8. The second flow regulating valve 18 is located between the outlet end of the water supply pipe 15 and the pipe mixer 17. By adjusting the opening of the second flow regulating valve 18, the pumping rate of sodium hydroxide and clean water can be adjusted, thereby eliminating the need for frequent start-stop of the backwash pump 11 and the greywater pump 16.

[0047] Other features, working principles, and beneficial effects of this embodiment are the same as those of Embodiment 2.

[0048] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0049] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description, and it is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A membrane tank water treatment system, comprising a membrane tank with multiple corridors (1), a chemical storage tank (2), a dosing pump (3), a main dosing pipeline (4), and multiple branch pipelines (5); the inlet end of the main dosing pipeline (4) is connected to the chemical storage tank (2), and the dosing pump (3) is installed on the main dosing pipeline (4); the inlet ends of the multiple branch pipelines (5) are all connected to the outlet end of the main dosing pipeline (4), and the outlet ends of the multiple branch pipelines (5) are connected to each of the multiple corridors (1); characterized in that, The inlet end of the corridor (1) is equipped with an inlet flow meter (6); the branch pipe (5) is equipped with a first flow regulating valve (7); the system also includes a controller (8); the inlet flow meter (6), the first flow regulating valve (7) and the dosing pump (3) are all connected to the controller (8) via signal.

2. The membrane tank water treatment system according to claim 1, characterized in that, Each branch pipe (5) is equipped with a drug flow meter (9), and each drug flow meter (9) is connected to the controller (8) via signal.

3. The membrane tank water treatment system according to claim 1, characterized in that, It also includes a cleaning agent storage tank (10), a backwash pump (11) and a flushing pipe (12). The inlet end of the flushing pipe (12) is connected to the cleaning agent storage tank (10), and the backwash pump (11) is installed on the flushing pipe (12). All branch pipes (5) are connected to the flushing pipe (12).

4. The membrane tank water treatment system according to claim 3, characterized in that, The outlet end of the flushing pipe (12) is connected to the main dosing pipe (4).

5. The membrane tank water treatment system according to claim 3, characterized in that, Each of the branch pipes (5) is equipped with a thickness detector (13), and the thickness detector (13) is connected to the controller (8) via signal.

6. The membrane tank water treatment system according to claim 5, characterized in that, The thickness detector (13) is an ultrasonic thickness detector.

7. A membrane tank water treatment system according to claim 5, characterized in that, It also includes an alarm that is signal-connected to the controller (8).

8. A membrane tank water treatment system according to claim 5, characterized in that, It also includes a water tank (14), a water delivery pipe (15), a secondary water pump (16), and a pipe mixer (17). The inlet end of the water delivery pipe (15) is connected to the water tank (14). The secondary water pump (16) is installed on the water delivery pipe (15) and is signal-connected to the controller (8). The outlet end of the water delivery pipe (15) is connected to the flushing pipe (12) and is located on the outlet side of the backwash pump (11). The pipe mixer (17) is installed on the flushing pipe (12) and is located between the outlet end of the water delivery pipe (15) and the branch pipe (5).

9. A membrane tank water treatment system according to claim 8, characterized in that, It also includes a second flow regulating valve (18), which is disposed on the flushing pipe (12) and signal-connected to the controller (8). The second flow regulating valve (18) is located between the outlet end of the water supply pipe (15) and the pipe mixer (17).

10. A membrane tank water treatment system according to any one of claims 1 to 9, characterized in that, Each of the corridors (1) is equipped with a membrane module; it also includes a water collection pipe (19) and a water pump (20). The water collection pipe (19) is provided with multiple water inlets, and the water outlet of the membrane module is connected to the water inlet of the water collection pipe (19) one by one. The water pump (20) is installed on the water collection pipe (19) and is signal-connected to the controller (8).

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