All-weather ammonia nitrogen monitoring device

Abstract

The utility model relates to the technical field of sewage treatment water quality monitoring equipment, in particular to an all-weather ammonia nitrogen monitoring device which comprises a water tank arranged in a cabinet body, an ammonia nitrogen monitor arranged at the top in the water tank, a water inlet and outlet pipe arranged at the bottom of the water tank, and a three-way valve arranged at the end part of the water inlet and outlet pipe, one end of the three-way valve is connected with a water inlet pipe, the other end of the three-way valve is provided with a drainage pipe, the drainage pipe is provided with a drainage electric valve, the water inlet pipe is provided with a water inlet main valve and a water pump, the water inlet main valve is communicated with a main pipe, the main pipe is communicated with a plurality of branch pipes, one branch pipe is a backwashing water pipe, and the other branch pipes are water inlet branch pipes; a detection water sample is firstly filtered by the pretreatment filtering device before entering the water tank to be detected, and the pretreatment filtering device is periodically backwashed by the backwashing water pipe and the backwashing spray head, so that sampling flow fluctuation caused by filter membrane blockage is reduced, the service life of a filter membrane is prolonged, and the manual maintenance frequency is reduced; the constant temperature control module greatly improves the precision of monitoring data.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater treatment water quality monitoring equipment, and in particular to an all-weather ammonia nitrogen monitoring device. Background Technology

[0002] Ammonia nitrogen is one of the key indicators of effluent quality from wastewater treatment plants, and real-time monitoring of ammonia nitrogen concentration is crucial for process control and achieving discharge standards. Currently, wastewater treatment plants commonly use online ammonia nitrogen monitors; however, existing technologies have the following problems in practical applications:

[0003] (1) Poor adaptability: Most commercially available ammonia nitrogen monitors do not have pretreatment devices, which can cause abnormal sensor sampling flow in high turbidity water, resulting in distorted monitoring data, such as numerical drift and response lag.

[0004] (2) The filter element is prone to the adhesion of impurities. Existing equipment usually requires manual disassembly and cleaning on a regular basis, resulting in high maintenance costs and low automation. Under the complex working conditions of sewage treatment plants, it suffers from the defects of frequent maintenance and low data reliability.

[0005] (3) The existing constant temperature module relies on a unidirectional electric heating element. The temperature control strategy relies only on heating and lacks cooling or heat dissipation components. It cannot actively cool down in high temperature environment, which causes the temperature fluctuation of the sensor flow cell to exceed the allowable range (±2℃) and the measured value deviates from the true ammonia nitrogen concentration. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide an all-weather ammonia nitrogen monitoring device with dual-mode constant temperature control, automatic timed backwashing of filter membrane, reduced filter membrane clogging, reduced frequency of manual maintenance, and more accurate measurement.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is: an all-weather ammonia nitrogen monitoring device, including a water tank installed inside a cabinet, an ammonia nitrogen monitor installed at the top of the water tank, a drain pipe and a drain inlet pipe installed at the bottom of the water tank, a three-way valve installed at the end of the drain pipe and the inlet pipe, one end of the three-way valve connected to a water inlet pipe, the other end of the three-way valve connected to a drain pipe, a drain electric valve installed on the drain pipe, a main water inlet valve and a water pump installed on the water inlet pipe, the main water inlet valve connected to a main pipe, the main pipe connected to multiple branch pipes, one of which is a backwash water pipe, and the rest are... The branch pipe is an inlet branch pipe, and a backwash electric valve is installed on the backwash water pipe. An inlet electric valve is also installed on the inlet branch pipe. The system also includes a pretreatment filtration device installed in the water tank. The water sample to be tested passes through the pretreatment filtration device before entering the inlet branch pipe. A backwash nozzle is installed at the end of the backwash water pipe for backwashing the pretreatment filtration device. A constant temperature control module is installed inside the cabinet. The ammonia nitrogen monitor, the drain electric valve, the main inlet valve, the water pump, the backwash electric valve, and the inlet electric valve are all signal-connected to a control system.

[0008] As a preferred technical solution, there are two water inlet branch pipes, namely the water inlet branch pipe of pool A and the water inlet branch pipe of pool B. The water inlet electric valve on the water inlet branch pipe of pool A is the water inlet valve of pool A, and the water inlet electric valve on the water inlet branch pipe of pool B is the water inlet valve of pool B.

[0009] As a preferred technical solution, manual valves are also installed on the branch pipes and between them and the main pipe.

[0010] As a preferred technical solution, the pretreatment filtration device includes a slide rail installed on the wall of the water tank, a connecting rod slidably installed vertically on the slide rail, a filter membrane frame fixedly installed at the lower end of the connecting rod, a filter membrane inserted into the filter membrane frame, a filter membrane outlet connected to a filter membrane outlet pipe, and the filter membrane outlet pipe connected to the inlet branch pipe.

[0011] As a preferred technical solution, the backwash water pipe is detachably installed on the connecting rod, and the backwash nozzle rotates and rinses the filter membrane.

[0012] As a preferred technical solution, the constant temperature control module includes a heating element and a cooling element installed inside the cabinet. A temperature sensor is installed inside the cabinet, and the heating element, the cooling element, and the temperature sensor are respectively connected to the control system.

[0013] As a preferred technical solution, the bottom of the water tank is conical, the upper part of the water tank is provided with an overflow port, and an overflow pipe is installed on the overflow port.

[0014] Due to the adoption of the above technical solution, the all-weather ammonia nitrogen monitoring device includes a water tank installed inside a cabinet. An ammonia nitrogen monitor is installed at the top of the water tank. A drain pipe and inlet / outlet pipe are installed at the bottom of the water tank. A three-way valve is installed at the end of the drain pipe, with one end connected to an inlet pipe and the other end connected to a drain pipe. A drain electric valve is installed on the drain pipe. A main inlet valve and a water pump are installed on the inlet pipe. The main inlet valve is connected to a main pipe, which in turn connects to multiple branch pipes. One branch pipe is a backwash water pipe, and the rest are inlet branch pipes. A backwash electric valve is installed on the backwash water pipe, and an inlet electric valve is installed on each inlet branch pipe. The device also includes a pretreatment filtration device installed inside the water tank. The water sample to be tested passes through the pretreatment filtration device before entering the inlet branch pipe. A backwash nozzle is installed at the end of the backwash water pipe for backwashing the pretreatment filtration device. A constant temperature control module is installed inside the cabinet. The ammonia nitrogen monitor is also included. The drain electric valve, main inlet valve, water pump, backwash electric valve, and inlet electric valve are each connected to a control system. The beneficial effects of this invention are: before entering the water tank for testing, the water sample is first filtered by a pretreatment filtration device. High-turbidity water is filtered before entering the ammonia nitrogen monitor for monitoring. Because there are multiple inlet branch pipes, it is easy to switch between the water tanks to be tested. The backwash pipe and backwash nozzle regularly backwash the pretreatment filtration device to ensure its filtration efficiency, reduce sampling flow fluctuations caused by filter membrane clogging, reduce the ammonia nitrogen concentration drift rate by 80%, and significantly reduce equipment maintenance costs; extend filter membrane life and reduce the frequency of manual maintenance; the constant temperature control module adjusts the temperature inside the cabinet in real time, eliminating water temperature interference with the ammonia nitrogen monitor, greatly improving the accuracy of monitoring data, reducing the measurement error from ±5% in traditional solutions to within ±1%, enhancing data stability and adaptability to complex water qualities. Attached Figure Description

[0015] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0016] Figure 1 This is a schematic diagram of the structure of the all-weather ammonia nitrogen monitoring device of this utility model;

[0017] Figure 2 This is a partial structural schematic diagram of the present invention;

[0018] Figure 3 This is a top view of the interior of the cabinet of this utility model.

[0019] In the diagram: 1-Cabinet; 2-Water tank; 3-Ammonia nitrogen monitor; 4-Drain pipe; 5-Three-way valve; 6-Inlet pipe; 7-Drain pipe; 8-Drain electric valve; 9-Main inlet valve; 10-Water pump; 11-Main pipe; 12-Backwash water pipe; 13-Backwash electric valve; 14-A tank inlet branch pipe; 15-A tank inlet valve; 16-B tank inlet branch pipe; 17-B tank inlet valve; 18-Manual valve; 19-Tank wall; 20-Slide rail; 21-Connecting rod; 22-Filter membrane frame; 23-Filter membrane; 24-Filter membrane outlet pipe; 25-Heating element; 26-Cooling element; 27-Overflow pipe; 28-Temperature sensor. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0021] like Figures 1 to 3As shown, the all-weather ammonia nitrogen monitoring device includes a water tank 2 installed inside a cabinet 1. An ammonia nitrogen monitor 3 is installed at the top of the water tank 2. A drain pipe and inlet / outlet pipe 4 are installed at the bottom of the water tank 2. A three-way valve 5 is installed at the end of the drain pipe and inlet / outlet pipe 4. One end of the three-way valve 5 is connected to an inlet pipe 6, and the other end is connected to a drain pipe 7. A drain electric valve 8 is installed on the drain pipe 7. A main inlet valve 9 and a water pump 10 are installed on the inlet pipe 6. The main inlet valve 9 is connected to a main pipe 11. Pipe 11 is connected to multiple branch pipes, one of which is a backwash water pipe 12, and the rest are inlet branch pipes. A backwash electric valve 13 is installed on the backwash water pipe 12, and an inlet electric valve is installed on each of the inlet branch pipes. The system also includes a pretreatment filtration device installed in the water tank. The water sample to be tested passes through the pretreatment filtration device before entering the inlet branch pipe. A backwash nozzle is installed at the end of the backwash water pipe 12 for backwashing the pretreatment filtration device. A constant temperature control system is installed inside the cabinet 1. The control module includes an ammonia nitrogen monitor 3, a drain electric valve 8, a main inlet valve 9, a water pump 10, a backwash electric valve 13, and an inlet electric valve, all of which are connected to a control system. Before entering the water tank 2 for testing, the water sample is first filtered by a pretreatment filtration device. High-turbidity water is filtered before entering the ammonia nitrogen monitor 3 for monitoring. Multiple inlet branch pipes allow for easy switching between the water tanks to be tested. The backwash pipe 12 and backwash nozzles periodically backwash the pretreatment filtration device to ensure its filtration efficiency, reduce sampling flow fluctuations caused by filter membrane 23 blockage, decrease the ammonia nitrogen concentration drift rate by 80%, and significantly reduce equipment maintenance costs. The filter membrane 23 has an extended lifespan, reducing the frequency of manual maintenance. The constant temperature control module adjusts the temperature inside the cabinet 1 in real time, eliminating water temperature interference with the ammonia nitrogen monitor 3, greatly improving the accuracy of monitoring data. The measurement error is reduced from ±5% in the traditional scheme to within ±1%, enhancing data stability and adaptability to complex water qualities.

[0022] like Figure 3 As shown, there are two inlet branch pipes: inlet branch pipe 14 for pool A and inlet branch pipe 16 for pool B. The electric inlet valve on inlet branch pipe 14 is inlet valve 15 for pool A, and the electric inlet valve on inlet branch pipe 16 is inlet valve 17 for pool B. When testing the water quality in pool A, inlet valve 15, main inlet valve 9, and water pump 10 are opened; when testing the water quality in pool B, inlet valve 17, main inlet valve 9, and water pump 10 are opened. Of course, if there is only one pool, then only one inlet branch pipe is needed.

[0023] like Figure 3 As shown, manual valves 18 are also installed on the branch pipes between them and the main pipe 11. Manual valves 18 are backup valves used in case the solenoid valve fails.

[0024] like Figure 1As shown, the pretreatment filtration device includes a slide rail 20 installed on the wall 19 of the water tank. A connecting rod 21 is vertically slidably installed on the slide rail 20. A filter membrane frame 22 is fixedly installed at the lower end of the connecting rod 21. A filter membrane 23 is inserted into the filter membrane frame 22. The outlet of the filter membrane 23 is connected to a filter membrane outlet pipe 24, which is connected to an inlet branch pipe. When the filter membrane 23 needs to be replaced, the connecting rod 21 is lifted upwards along the slide rail 20 to the water surface. Since the filter membrane 23 is inserted into the filter membrane frame 22, it is very convenient to replace the new filter membrane 23. After replacement, the connecting rod 21 is slid downwards along the slide rail 20 into the water tank.

[0025] like Figure 1 As shown, the backwash water pipe 12 is detachably mounted on the connecting rod 21, and the backwash nozzle rotates and rinses the filter membrane 23. During routine maintenance, the filter membrane 23 is rinsed by opening the backwash nozzle at regular intervals. A rotating nozzle can be selected to rinse the filter membrane 23 from multiple angles and directions, resulting in a cleaner, more thorough cleaning. Existing technology nozzles are sufficient. Backwashing reduces the frequency of filter membrane 23 replacements, extends its lifespan, and lowers the frequency of manual maintenance.

[0026] like Figure 1 As shown, the constant temperature control module includes a heating element 25 and a cooling element 26 installed inside the cabinet 1. A temperature sensor 28 is installed inside the cabinet 1. The heating element 25, cooling element 26, and temperature sensor 28 are respectively connected to the control system. The constant temperature control module integrates a dual-mode temperature control system of heating and semiconductor cooling element 26, with temperature fluctuation ≤ ±0.5℃. It improves sensor accuracy and optimizes sensor placement to achieve rapid response. It needs to balance energy efficiency and temperature control accuracy, and maintain a constant water temperature to make the monitoring results more accurate.

[0027] like Figure 1 and Figure 2 As shown, the bottom of water tank 2 is conical, and the upper part of water tank 2 is provided with an overflow port, on which an overflow pipe 27 is installed. The conical bottom design makes it easier to empty and leaves no residue of the previous sample.

[0028] The workflow of this utility model is as follows:

[0029] (a) In single-pool mode, let's assume it's pool A;

[0030] Step 1. Perform the test according to the set test cycle. The control system sends the open signal to the inlet valve 15 and the main inlet valve 9 of pool A, and the water pump 10 starts to extract water samples from pool A.

[0031] Step 2. The water sample enters the pretreatment filtration device installed in pool A, and after filtration, it enters the water tank 2 inside cabinet 1;

[0032] Step 3. The ammonia nitrogen monitor 3 detects the ammonia nitrogen value of the water sample and uploads the data to the control system. Excess water sample flows out through the overflow pipe 27 of the water tank 2.

[0033] Step 4. After this round of testing is completed, water pump 10 is turned off, inlet valve 15 of pool A is closed, and drain electric valve 8 is opened to empty water tank 2, in preparation for the next test.

[0034] Step 5. Backwashing System: Backwashing is performed according to the set backwashing cycle. During backwashing, the current mode is determined. If it is single-tank mode, first close the main inlet valve 9 and water pump 10, and open the backwash electric valve 13 and A-tank inlet valve 15. The backwash water then backwashes the filter membrane 23. The backwash water can be recycled water from the plant area.

[0035] (ii) In the dual-single pool mode, assuming there are pool A and pool B, the switching period detection between pool A and pool B in the dual-pool mode prioritizes detection of pool A, and then detects detection of pool B after the switching is completed.

[0036] Step 1. The system will open the inlet valve 15 of tank A and the main inlet valve 9, and close the backwash electric valve 13, the inlet valve 17 of tank B, and the drain electric valve 8. After the inlet valve 15 of tank A and the main inlet valve 9 are fully opened, the water pump 10 will be turned on. A water sample will be drawn from tank A for testing. After the test is completed, the drain electric valve 8 will be opened to empty the water tank 2, preparing for the next test.

[0037] Step 2. After draining the water sample from tank 2, close the drain electric valve 8, open the B tank inlet valve 17 and the main inlet valve 9, and close the backwash electric valve 13 and the A tank inlet valve 15. After the B tank inlet valve 17 and the main inlet valve 9 are fully open, start the water pump 10. Draw a water sample from the B tank for testing. After the test is completed, open the drain electric valve 8 to drain tank 2, preparing for the next test.

[0038] Step 3. Backwashing System: Backwashing is performed according to the set backwashing cycle. During backwashing, the current mode is determined. If it is a dual-tank mode, Tank A is cleaned first. First, the main inlet valve 9 and water pump 10 are closed, and the backwash electric valve 13 and Tank A inlet valve 15 are opened. The backwash water then backwashes the filter membrane 23 in Tank A. Reclaimed water from the plant area can be used for backwashing. After completion, Tank B is cleaned. The Tank A inlet valve 15 and water pump 10 are closed, and the Tank B inlet valve 17 is opened. The backwash water then backwashes the filter membrane 23 in Tank B. Reclaimed water from the plant area can be used for backwashing.

[0039] This utility model adopts a modular and detachable instrument interface, uses a box and RS485 signal conversion module (Modbus protocol adaptive), is compatible with multiple brands of ammonia nitrogen analyzers, and regularly flushes the filter membrane 23 to automatically remove impurities and biofilm from the surface of the filter membrane 23, reducing the maintenance frequency by 75%, significantly improving the accuracy of monitoring data, enhancing data stability, optimizing operating energy consumption and space occupation, and enhancing adaptability to complex water quality.

[0040] The technical features of the software and circuit programs involved in this application are existing technologies. The essence of the technical solution of this application is to improve the composition and connection relationship of the hardware part, and does not involve the improvement of the software program or circuit structure itself.

[0041] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying 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 element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An all-weather ammonia nitrogen monitoring device, characterized by: The system includes a water tank (2) installed inside a cabinet (1), an ammonia nitrogen monitor (3) installed on the top of the water tank (2), a drain pipe (4) installed at the bottom of the water tank (2), a three-way valve (5) installed at the end of the drain pipe (4), a water inlet pipe (6) connected to one end of the three-way valve (5), a drain pipe (7) installed at the other end of the three-way valve (5), a drain electric valve (8) installed on the drain pipe (7), a main inlet valve (9) and a water pump (10) installed on the water inlet pipe (6), a main inlet valve (9) connected to a main pipe (11), and a main pipe (11) connected to multiple branch pipes, one of which is a backwash water pipe (12), and the rest... The branch pipe is an inlet branch pipe, and a backwash electric valve (13) is installed on the backwash water pipe (12). An inlet electric valve is installed on the inlet branch pipe. It also includes a pretreatment filter device, which is installed in the water tank. The water sample to be tested enters the inlet branch pipe after passing through the pretreatment filter device. A backwash nozzle is installed at the end of the backwash water pipe (12) for backwashing the pretreatment filter device. A constant temperature control module is installed in the cabinet (1). The ammonia nitrogen monitor (3), the drain electric valve (8), the main inlet valve (9), the water pump (10), the backwash electric valve (13), and the inlet electric valve are respectively connected to the control system.

2. The all-weather ammonia nitrogen monitoring device of claim 1, wherein: There are two water inlet branches, namely the A pool water inlet branch (14) and the B pool water inlet branch (16). The water inlet electric valve on the A pool water inlet branch (14) is the A pool water inlet valve (15), and the water inlet electric valve on the B pool water inlet branch (16) is the B pool water inlet valve (17).

3. The all-weather ammonia nitrogen monitoring device of claim 1, wherein: Manual valves (18) are also installed on the branch pipes and between them and the main pipe (11).

4. The all-weather ammonia nitrogen monitoring device of claim 1, wherein: The pretreatment filtration device includes a slide rail (20) installed on the wall (19) of the pool. A connecting rod (21) is slidably installed vertically on the slide rail (20). A filter membrane frame (22) is fixedly installed at the lower end of the connecting rod (21). A filter membrane (23) is inserted into the filter membrane frame (22). The outlet of the filter membrane (23) is connected to a filter membrane outlet pipe (24). The filter membrane outlet pipe (24) is connected to the inlet branch pipe.

5. The all-weather ammonia nitrogen monitoring device of claim 4, wherein: The backwash water pipe (12) is detachably installed on the connecting rod (21), and the backwash nozzle rotates and rinses the filter membrane (23).

6. The all-weather ammonia nitrogen monitoring device of claim 1, wherein: The constant temperature control module includes a heating element (25) and a cooling element (26) installed in the cabinet (1). A temperature sensor (28) is installed in the cabinet (1). The heating element (25), the cooling element (26) and the temperature sensor (28) are respectively connected to the control system.

7. The all-weather ammonia nitrogen monitoring device according to any one of claims 1 to 6, characterized in that: The bottom of the water tank (2) is conical, and the upper part of the water tank (2) is provided with an overflow port, and an overflow pipe (27) is installed on the overflow port.

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