A mobile on-line automatic detection instrument for reverse osmosis

Abstract

The utility model discloses a mobile reverse osmosis on-line automatic detection instrument. An installation plate is installed on the installation board. A control center is arranged inside the shell. A camera is connected to the front end of the shell. A motor is installed on the installation board. The output shaft of the motor is connected to a propeller. A protective mesh cover is arranged outside the motor and the propeller. The protective mesh cover is connected to the installation board. A conductivity electrode is also arranged inside the shell. The electrode plate of the conductivity electrode extends outside the shell. The control center includes a power supply, a locator, a processor and a wireless communication module. The power supply supplies power to the conductivity electrode, the camera, the motor, the processor, the locator and the wireless communication module. The processor is connected to a remote control terminal through the wireless communication module. The utility model is small in volume, has little influence on the fresh water flow pattern during the movement in the fresh water channel, can detect during the normal operation of the reverse osmosis device, and can reflect the real situation during operation; during detection, a single person can operate, without manual sampling and measurement, without wasting water resources, and saving manpower and material resources.

Description

Technical Field

[0001] This utility model belongs to the field of industrial water treatment technology and is applied to industrial water membrane purification treatment, demineralized water preparation, boiler feedwater treatment, high-purity water preparation and other application systems. Specifically, it relates to a mobile reverse osmosis online automatic detection instrument. Background Technology

[0002] In industrial water treatment, especially in process systems such as boiler feedwater treatment, demineralized water, and ultrapure water, reverse osmosis is the most commonly used process equipment for removing salt from water. It is generally equipped with instruments such as pressure and conductivity to monitor the influent, effluent, and product water of each section of the reverse osmosis unit. However, when the reverse osmosis product water is unqualified, it is not possible to find out which specific membrane element or location has a problem. Currently, the market only offers manual sampling and measurement devices that can roughly reflect the performance of a single membrane element within a membrane housing. When using this device, the reverse osmosis unit must be stopped. Remove the plugs or sampling valves from the freshwater outlets on both end plates of the reverse osmosis membrane housing. Insert the manual sampling hose into the membrane housing along one end in the direction of the permeate flow. Observe from the other end that the sampling hose has reached that end. Then, reinstall the plug or sampling valve from the freshwater outlet on that end plate. Reinstall the measuring plug from the freshwater outlet on the opposite end plate. Keep the hose stationary during plug installation. Once the reverse osmosis system is running smoothly, gradually pull out the sampling hose and record the conductivity data from samples taken at different locations. This testing method has significant errors: because it uses a flexible tube, the length of the tube entering the membrane housing differs from the membrane housing length, and the length error is substantial. Furthermore, the measurement location is determined based on the length of the tube pulled out from one end of the membrane housing. Additionally, the tube's elasticity introduces measurement errors, so the recorded data cannot accurately reflect the actual location. It's difficult to pinpoint which membrane element or connector within the membrane housing is faulty, or even whether the problem lies with the membrane element or the connector. Moreover, manual sampling is highly susceptible to environmental and human interference during the sampling process and sample delivery and measurement, resulting in low data accuracy. This method requires repeated disassembly and reassembly of the reverse osmosis unit's membrane housing endplate plugs or sampling valves, resulting in repeated water draining and significant water waste. It also necessitates repeated start-ups and shutdowns of the reverse osmosis unit. Sampling requires at least three people and dedicated safety personnel for monitoring, creating a substantial demand on human and material resources.

[0003] Some reverse osmosis detection and sampling devices use sampling tubes with a certain degree of rigidity instead of sampling hoses for manual sampling. Although the accuracy of the measurement length is improved, the reverse osmosis device still needs to be stopped before it can be used, and online automatic detection cannot be achieved.

[0004] Chinese Patent Application No. 201810076351.9 also discloses an automatic detection device for reverse osmosis membrane housings, including a detection part and a main body part. The detection part includes a probe located at the top and a moving mechanism connecting the probe and the main body part. The probe is movable within the permeate center tube of the reverse osmosis membrane housing via the moving mechanism to reach a predetermined position and detect conductivity and flow data at that predetermined position. A processing unit is electrically connected to the detection part, the driving mechanism, and a touch screen. The processing unit generates conductivity and flow trend graphs based on the displacement data, conductivity data, and flow data, and obtains the location data of the fault point in the permeate center tube of the reverse osmosis membrane housing. While the probe of this device can enter the permeate center tube of the reverse osmosis membrane housing, the main body part cannot, resulting in only one membrane element being detected at a time, leading to low detection efficiency. Summary of the Invention

[0005] To address the problems of existing technologies that cannot perform online testing of reverse osmosis devices or can only test one membrane element at a time, resulting in low testing efficiency, this invention provides a mobile online automatic reverse osmosis testing instrument that is simple to operate and provides accurate measurements.

[0006] The objective of this utility model is achieved in the following manner:

[0007] A mobile reverse osmosis online automatic detection instrument includes a housing, a mounting plate connected to the rear outer wall of the housing, a control center inside the housing, a camera connected to the front end of the housing, a motor mounted on the mounting plate, a propeller connected to the motor output shaft, a protective mesh cover on the outside of the motor and propeller, and the protective mesh cover connected to the mounting plate. A conductivity electrode is also installed inside the housing, with its plate extending outside the housing. The control center includes a power supply, a positioner, a processor, and a wireless communication module. The power supply provides power to the conductivity electrode, camera, motor, processor, positioner, and wireless communication module. The processor is connected to a remote control terminal via a wireless communication module.

[0008] The automatic testing instrument has a diameter of 8-10mm and a length of 20-25mm.

[0009] The conductivity electrodes are arranged in two sets that are parallel and symmetrical to each other.

[0010] Each set of conductivity electrodes has its plates extending 2 mm beyond the outer surface of the casing, and the distance between the plates of the two sets of conductivity electrodes is 2 mm.

[0011] Multiple ribs are evenly distributed on the outside of the shell, and the ribs have a streamlined structure.

[0012] Compared to existing technologies, this utility model discloses a mobile online automatic reverse osmosis testing instrument. It is small in size, its movement within the freshwater channel has minimal impact on the freshwater flow pattern, and it performs testing during normal operation of the reverse osmosis unit, providing data that accurately reflects the actual operating conditions. Testing can be operated by a single person, eliminating the need for manual sampling and measurement, thus saving water resources and manpower. Conductivity measurement data and instrument position are displayed in real time, and the internal conditions of the freshwater channel can be observed intuitively via video feed. Once installed in the reverse osmosis unit, the instrument can perform testing at any time, including during operation, flushing, and chemical cleaning processes, without affecting the testing. It achieves truly online testing, enabling full-process monitoring of the reverse osmosis unit's membrane elements, membrane element connectors, membrane element-shell connectors, freshwater branch pipes, and freshwater main pipe. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is the front view of this utility model.

[0015] Figure 3 This is the left view of this utility model.

[0016] Figure 4 This is the right view of this utility model. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. After reading the contents of the present invention, those skilled in the art can make various modifications or alterations to the present invention, and these equivalent forms also fall within the scope defined by the present invention.

[0018] like Figure 1-4 As shown, a mobile reverse osmosis online automatic detection instrument includes a housing 1, a mounting plate 2 connected to the rear outer wall of the housing 1, a control center 3 inside the housing 1, a camera 4 connected to the front end of the housing 1, a motor 5 mounted on the mounting plate 2, a propeller 6 connected to the output shaft of the motor 5, a protective mesh cover 7 outside the motor 5 and the propeller 6, and the protective mesh cover 7 connected to the mounting plate 2. A conductivity electrode 8 is also provided inside the housing 1, with the electrode plate of the conductivity electrode 8 extending outside the housing. The control center 3 includes a power supply, a positioner, a processor, and a wireless communication module. The power supply provides power to the conductivity electrode 8, the camera 4, the motor 5, the processor, the positioner, and the wireless communication module. The processor is connected to a remote control terminal through a wireless communication module.

[0019] The remote control terminal includes an input module and a display module. The input module is used to input parameters to control the automatic detection instrument to move forward, backward, or stop. The conductivity data measured by the online detection instrument, the real-time position, and the real-time images captured by the camera are transmitted through the wireless communication module and displayed on the display module of the remote control terminal.

[0020] Furthermore, threaded holes are provided at both the front and rear ends of the housing 1. One end is threaded to the camera and the other end is threaded to the motor housing. The connection is sealed with rubber sealing rings, polytetrafluoroethylene fillers or water-resistant sealant to prevent water ingress.

[0021] The automatic testing instrument has a diameter of 8-10mm and a length of 20-25mm. The housing 1 is the skeleton of the automatic testing instrument, used to assemble and fix various components. Since the automatic testing instrument needs to drill into the reverse osmosis central tube with an inner diameter of 1", and needs to bend at the 90° bend of the freshwater pipe, its overall size needs to be controlled. After calculation and experimental verification, the movement is smoothest when the diameter is 8-10mm and the length is 20-25mm. The power supply for the conductivity electrode 8, camera 4, motor 5, processor, positioner and wireless communication module all need to be selected from micro-components.

[0022] Further optimization options include: for camera 4, the SS-L1475 model (4.4mm in diameter) can be selected with the power supply removed; for motor 5, the 0612 model 3.7V drone mini motor (6mm in diameter and 12mm in length) can be selected; for propeller 6, the 568JIW0V model (26mm in diameter) can be machined to a diameter of 10mm; and for power supply, the CR927 model can be selected.

[0023] The two sets of reverse osmosis membrane elements are connected by a connecting central tube. There may be gaps or minor unevenness at the connection between this connecting central tube and the central tube inside the membrane element. The elliptical spherical cap design at the ends of the housing 1 and the protective mesh cover 7 ensures that the automatic detection instrument can pass smoothly through the connection of the central tube of the reverse osmosis membrane element without getting stuck.

[0024] The material of the shell 1 is required to be corrosion resistant and have low density; common low-density plastics and foamed plastics can be used.

[0025] Camera 4 can observe cracks in the inner wall of the connecting central tube and whether there is membrane biofouling inside the reverse osmosis central tube, thus clarifying the cause of the sudden change in conductivity. Based on the cause, further operations can be carried out. For example, if membrane biofouling is the cause, only cleaning is required, and the reverse osmosis membrane does not need to be replaced. If the sudden change in conductivity after ruling out membrane biofouling is the cause, it can be determined that the reverse osmosis membrane is damaged and needs to be replaced.

[0026] The structural design of the protective net cover 7 can reduce the overall weight of the automatic detection instrument and allow the propeller to be placed in water, thus meeting the propeller's usage requirements.

[0027] Furthermore, the conductivity electrodes 8 are arranged in two parallel and symmetrical sets. One set measures conductivity below 1000 μs / cm, and the other set measures conductivity above 1000 μs / cm. In this way, the cleaning effect of reverse osmosis can be detected during chemical cleaning of the reverse osmosis unit, and the cleaning effect of each membrane element can be accurately judged.

[0028] Each set of conductivity electrodes has its plates extending 2 mm beyond the casing, with a 2 mm gap between the plates of two sets of conductivity electrodes. The plates of the conductivity electrodes 8 exposed outside the casing must be strictly parallel and symmetrical. The plate size and spacing can vary, but considering the operating environment of the automatic testing instrument and the capacity of the battery used, a 2 mm extension of the plates and a 2 mm gap between the plates of two sets of conductivity electrodes are optimal. This ensures accurate measurement while preventing the plate size from affecting the movement of the automatic testing instrument within the reverse osmosis central tube.

[0029] Multiple ribs 9 are evenly arranged on the outside of the housing 1. The ribs 9 have a streamlined structure to prevent them from getting stuck when the detection instrument passes through the membrane element connecting to the central tube.

[0030] The method for conducting tests using the aforementioned mobile online automatic reverse osmosis testing instrument includes the following steps:

[0031] a. When the reverse osmosis unit is shut down, disconnect a freshwater branch pipe connected to the end plate of the reverse osmosis membrane housing, place the aforementioned automatic detection instrument inside it, and let it fall into the freshwater branch main pipe, then restore the freshwater branch pipe.

[0032] b. Start the reverse osmosis unit and operate it using the remote control terminal. Start the drive motor 5 to drive the propeller 6 to rotate, thereby automatically moving the detection instrument in the freshwater branch pipe. By measuring the change in conductivity of each freshwater branch pipe leading to the branch pipe, if the data at a certain position suddenly changes sharply, it indicates that there is a problem with the water production of the freshwater branch pipe connected at that point. Record this position and process it after the test is completed.

[0033] c. Move the automatic detection instrument to the freshwater main pipe into which the freshwater branch main pipes converge, then move it to the next freshwater branch main pipe and repeat the operation.

[0034] d. Shut down the reverse osmosis unit and remove the automatic testing instruments;

[0035] e. Remove the freshwater branch pipe that has been identified as having a problem, place the reverse osmosis online monitoring instrument inside it, and push it into the central tube of the reverse osmosis membrane housing end plate connected to it, and then restore the freshwater branch pipe.

[0036] f. Start the reverse osmosis unit and operate it using the remote control terminal. Move the automatic testing instrument in the central tube of the reverse osmosis membrane element and measure the change in conductivity of the fresh water in the central tube from the first membrane element to the last membrane element. If the data at a certain position suddenly changes sharply, it indicates that there is a problem with the reverse osmosis membrane element or the connection at that position. Record this position and process it after the measurement is completed.

[0037] g. Furthermore, after the automatic detection instrument is placed, it moves to the branch pipe position of the reverse osmosis unit and stops there. During the operation of the reverse osmosis unit, it can be operated at any time using the remote control terminal.

[0038] Compared with the prior art, this utility model has the following advantages:

[0039] 1. The instrument is small in size, and its movement in the freshwater channel has little impact on the freshwater flow pattern. It can detect the flow during normal operation of the reverse osmosis unit, and the data can reflect the actual operating conditions.

[0040] 2. The test can be operated by a single person without the need for manual sampling and measurement, thus saving water resources and manpower and material resources;

[0041] 3. Conductivity measurement data and instrument position are displayed in real time, and the internal conditions of the freshwater channel can be observed intuitively through video footage;

[0042] 4. After the instrument is installed in the reverse osmosis unit, it can be tested at any time, and the operation, rinsing and chemical cleaning processes will not affect the test.

[0043] 5. It achieves fully online testing, enabling comprehensive testing of the reverse osmosis unit's membrane elements, membrane element connectors, membrane element-membrane housing connectors, freshwater branch pipes, and freshwater main pipes.

[0044] The above description is only a preferred embodiment of the present utility model. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present utility model, and these should also be considered within the protection scope of the present utility model.

Claims

1. A mobile reverse osmosis online automatic detection instrument, characterized in that: The device includes a housing (1), a mounting plate (2) connected to the outer wall of the rear end of the housing (1), a control center (3) set inside the housing (1), a camera (4) connected to the front end of the housing (1), a motor (5) mounted on the mounting plate (2), a propeller (6) connected to the output shaft of the motor (5), a protective mesh cover (7) set outside the motor (5) and the propeller (6), the protective mesh cover (7) being connected to the mounting plate (2), a conductivity electrode (8) also set inside the housing (1), the electrode plate of the conductivity electrode (8) extending out of the housing, the control center (3) including a power supply, a locator, a processor and a wireless communication module, the power supply providing power to the conductivity electrode (8), the camera (4), the motor (5), the processor, the locator and the wireless communication module, the processor being connected to a remote control terminal through a wireless communication module.

2. The mobile reverse osmosis online automatic detection instrument according to claim 1, characterized in that: The automatic testing instrument has a diameter of 8-10mm and a length of 20-25mm.

3. The mobile reverse osmosis online automatic detection instrument according to claim 1, characterized in that: The conductivity electrodes (8) are two sets arranged in parallel and symmetrically.

4. The mobile reverse osmosis online automatic detection instrument according to claim 3, characterized in that: Each set of conductivity electrodes has its plates extending 2 mm beyond the outer surface of the casing, and the distance between the plates of the two sets of conductivity electrodes is 2 mm.

5. The mobile reverse osmosis online automatic detection instrument according to claim 1, characterized in that: Multiple ribs (9) are evenly arranged on the outside of the shell (1), and the ribs (9) have a streamlined structure.

Images