Device and method for testing performance of scale inhibition and prevention equipment

Abstract

The invention discloses a device and method for testing the performance of scale inhibition and prevention equipment, and belongs to the field of scale inhibition equipment performance tests.The testing device comprises a rack, a heating kettle is arranged on the rack, a stirring assembly is arranged in the heating kettle, a circulation pipeline is connected to the heating kettle, the circulation pipeline is wound around the rack in a lap joint mode, and the stirring assembly is arranged in the heating kettle. The circulating pipeline comprises a test branch, the test branch is detachably connected with scale inhibition and prevention equipment, and hanging piece pull rods which are vertically arranged and annularly distributed along the interior of the heating kettle are arranged in the heating kettle. The testing device can rapidly and efficiently evaluate the scale inhibition and removal performance of the alloy scale inhibition and removal product, is simple in structure, complete in function, convenient to operate, high in universality and capable of rapidly and efficiently evaluating the scale inhibition and removal performance of the alloy scale inhibition and removal product, and meanwhile, the invention further provides a scale inhibition and removal equipment performance testing method which is simple and efficient.

Description

Technical Field

[0001] This invention relates to a testing device, and more specifically, to a device and method for testing the performance of scale inhibition and prevention equipment. Background Technology

[0002] In the fields of chemical engineering and environmental water treatment, scaling is a widespread and serious problem. For example, scaling in circulating water systems increases resistance to media transport and reduces heat transfer efficiency, leading to decreased production efficiency, increased costs, and heightened safety risks. Currently, the scaling mechanism of alloy scale inhibition technology is not fully understood, and the scale inhibition and removal performance of alloy scale prevention equipment remains unclear. Existing testing equipment and evaluation methods for physical or chemical scale removal technologies are not entirely applicable to alloy scale prevention equipment.

[0003] For example, Chinese Patent Publication No. CN118183958A, published on June 14, 2024, entitled "A Simple Experimental Device and Method for Testing Scale Inhibition Performance," discloses a testing device and method for the performance of scale inhibition and prevention equipment. The device includes a water tank, a flow meter, a water pump, an electromagnetic scale inhibitor, a ball valve, and a temperature controller. The outlet of the water tank is connected to the inlet of the water pump via the flow meter, and the outlet of the water pump is connected to the inlet of the electromagnetic scale inhibitor. The outlet of the electromagnetic scale inhibitor is connected to the inlet of the water tank via the ball valve. A heating rod and a temperature sensor are installed inside the water tank. The temperature controller is connected to the control end of the heating rod, and the output end of the temperature sensor is connected to the temperature controller. The water tank contains an experimental solution. This device and method can achieve static testing of the scale inhibition performance of scale inhibitors and dynamic testing of the electromagnetic scale inhibition performance. However, this scheme cannot simulate the performance testing of scale inhibition and prevention equipment in a circulating water system and is not applicable to the scale inhibition and removal performance testing of alloy scale inhibitors. Summary of the Invention

[0004] This invention overcomes the above-mentioned technical problems and provides a performance testing device for scale inhibition and prevention equipment. The testing device can quickly and efficiently evaluate the scale inhibition and removal performance of alloy scale prevention products. It also provides a performance testing method for scale inhibition and prevention equipment, which is simple, efficient and intelligent.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a performance testing device for scale inhibition and prevention equipment, comprising a frame, a heating vessel mounted on the frame, a stirring assembly inside the heating vessel, and a circulation pipeline connected to the heating vessel. The circulation pipeline is coiled around the frame and includes a test branch on which scale inhibition and prevention equipment is detachably connected. Vertically arranged hanging rods are provided inside the heating vessel, arranged in a ring along its interior. The stirring assembly can stir the test water sample inside the heating vessel, improving its uniformity and simulating a turbulent environment. The two ends of the circulation pipeline are connected to the input and output ends of the heating vessel, respectively, allowing the test water sample inside to circulate. The scale inhibition and prevention equipment on the test branch can enhance scale inhibition and prevention in the pipeline, thereby verifying the scale inhibition and prevention effect of the equipment. This solution can quickly and efficiently evaluate the scale inhibition and removal performance of alloy scale inhibitor products.

[0006] Preferably, the stirring assembly is laterally inserted into the heating vessel. The heating assembly includes a stirrer, the width of which is parallel to the stirring shaft. This laterally inserted arrangement avoids interference with the top structure of the heating vessel and facilitates opening the vessel lid for observation of test results and cleaning. The parallel arrangement of the stirrer's width to the stirring shaft improves the stirring effect on the test water sample during rotation.

[0007] Preferably, the circulation pipeline includes a first pipeline, which comprises a test branch and a control branch arranged in parallel. Ball valve assemblies are installed on both the test branch and the control branch. The first pipeline is used for both testing and control. The ball valve assemblies can respectively open and close the test water samples on the test branch and the control branch. The performance of the scale inhibition and prevention equipment is tested by comparing the test water samples and scaling conditions before and after the test on the two branches.

[0008] Preferably, the circulation pipeline further includes a second pipeline connected to the first pipeline. A support frame is provided on the platform, and the second pipeline is arranged in an S-shape and wound around the support frame. The second pipeline is used to simulate the environment of a circulating water system. By winding it into an S-shape, the distance between pipelines in the circulating water system can be effectively increased, reducing the overall volume of the device.

[0009] Preferably, the second pipeline is composed of several detachable connecting pipe sections, which are connected by U-shaped pipes. The use of connecting pipes in the second pipeline facilitates disassembly and weighing before and after testing.

[0010] Preferably, the diameter of the connecting pipe is varied along the pipeline direction. The variable-diameter design of the connecting pipe can break the laminar flow phenomenon in traditional test pipelines, and also allows for different flow velocities at different locations in the pipeline, enabling the testing of the scale inhibition and prevention equipment's performance under different flow velocities.

[0011] Preferably, the first pipeline is equipped with a first sampling valve and a second sampling valve at both its input and output ends, and the second pipeline is equipped with a third sampling valve at its output end. Installing sampling valves at different locations on the first and second pipelines allows for effective detection of the concentration of metal ions at different locations within the pipelines.

[0012] Preferably, the bottom of the heating vessel is connected to a drain pipe, the middle of which is connected to the heating vessel. One end of the drain pipe is equipped with a drain valve, and the other end is connected to the first pipeline. The drain valve can discharge the test water sample from the heating vessel and is controlled by the drain valve. Arranging the first pipeline and the drain pipe together can effectively simplify the pipeline layout of the device.

[0013] Preferably, the test stand is equipped with a drive pump located on the circulation pipeline, and the bottom of the test stand is equipped with a support base and a set of casters. The drive pump provides power for the circulation of the test water sample; the casters at the bottom of the test stand facilitate the movement of the device.

[0014] A method for testing the performance of scale inhibition and prevention equipment, implemented using the aforementioned scale inhibition and prevention equipment performance testing device, includes the following steps: S1: Heating the test water sample in the heating vessel to a set temperature; S2: Sequentially opening the ball valves on the test branch and the control branch to circulate the test water sample; S3: During the circulation of the test water sample, taking samples at the input and output ends of the first pipeline and the output end of the second pipeline at regular intervals; S4: Comparing the weight and metal ion concentration of the circulation pipeline before and after the test, and evaluating the scale crystal structure in the two sets of tests, to assess the effectiveness of the equipment.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the scale inhibition and descaling performance testing device and method are simple in structure, complete in function, convenient in operation, and highly versatile. They can quickly and efficiently evaluate the scale inhibition and descaling performance of alloy scale inhibition and descaling products, explore the influence of water quality parameters and element ratios and structural parameters of alloy scale inhibition equipment on scale inhibition and descaling performance, provide a way and platform support for the design and selection of alloy scale inhibition equipment, and provide verification and guidance for the field application of alloy scale inhibition equipment. Attached Figure Description

[0016] Figure 1 This is an isometric view of the present invention.

[0017] Figure 2 This is a top view of the present invention.

[0018] Figure 3 for Figure 2 A cross-sectional view along the AA direction.

[0019] Figure 4 This is a schematic diagram of the circulation pipeline arrangement on the test bench of the present invention.

[0020] Figure 5 This is a schematic diagram of the internal structure of the heating vessel of the present invention.

[0021] In the diagram: 1. Stand, 2. Heating vessel, 3. Circulation pipeline, 3.1. First pipeline, 3.2. Second pipeline, 4. Test branch, 5. Control branch, 6. Scale inhibition and prevention device, 7. Hanging plate tie rod, 8. Stirrer, 9. Stirring shaft, 10. Drive device, 11.1 First ball valve, 11.2. Second ball valve, 11.3. Third ball valve, 12. Support frame, 13. Connecting pipe, 14. U-shaped pipe, 15.1. First sampling valve 15.2. Second sampling valve, 15.3. Third sampling valve, 16. Drain pipe, 17. Drain valve, 18. Support base, 19. Casters, 20. Drive pump, 21.1. First thermometer, 21.2. Second thermometer, 21.3. Third thermometer, 22. Pressure gauge, 23. Check valve, 24. Flow meter, 25. Shut-off valve, 26. Cover plate, 27. Control system, 28. Temperature transmitter, 29. Level transmitter. Detailed Implementation

[0022] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1: As Figures 1 to 5 The scale inhibition and prevention device shown includes a stand 1, a heating vessel 2 and a circulation pipeline 3 arranged on the top of the stand 1. The two ends of the circulation pipeline 3 are connected to the input end and the output end of the heating vessel 2, respectively, so as to realize the circulation of the test water sample in the heating vessel 2. A test branch 4 and a control branch 5 are set in the circulation pipeline 3, and a scale inhibition and prevention device 6 is set on the test branch 4. The performance of the scale inhibition and prevention device 6 is tested by circulating the test water sample in the two branches respectively.

[0024] Specifically, the frame 1 is a rectangular support structure, with four legs formed by horizontally and vertically arranged rods. A heating vessel 2 is positioned at the top center of the frame 1. The upper part of the heating vessel 2 is cylindrical, and the lower part is elliptical. A support plate is arranged at the junction of the cylindrical and elliptical structures and along the circumference of the heating vessel 2. The support plate is fixed to the top of the frame 1 using screws. A heating assembly (not shown in the figure) is installed inside the heating vessel 2. This heating assembly heats the test water sample inside the heating vessel 2 to a set temperature, simulating the temperature in a water circulation system.

[0025] Furthermore, a stirring assembly is also provided inside the heating vessel 2. Specifically, the stirring assembly includes a drive device 10, a stirring shaft 9, and a stirrer 8. The drive device 10 is located above the platform 1 and is fixedly connected to the platform 1. The drive device 10 is also located outside the stirring vessel 2. The output end of the drive device 10 is connected to the stirring shaft 9 and can drive the stirring shaft 9 to rotate. The end of the stirring shaft 9 away from the drive device 10 extends into the stirring vessel 2. The stirring shaft 9 and the stirring vessel 2 are sealed to prevent the test water sample in the heating vessel 2 from leaking out from the connection between the stirring shaft 9 and the heating vessel 2. A stirrer 8 is located on one side of the heating vessel, inside the stirring shaft 9. The stirrer 8 is positioned along the axis of the heating vessel 2 and has a fan-shaped hollow structure; that is, the outer periphery of the stirrer 8 is a fan-shaped frame, while the interior is hollow. This effectively reduces the weight of the stirrer 8. Furthermore, the width direction of the stirrer 8 (the direction in which the fan-shaped structure unfolds) is parallel to the direction of the stirring shaft 9, which effectively increases the stirring area of ​​the stirrer 8. To ensure the stirring effect, the radial dimension of the arc segment of the stirrer 8 can be designed to be slightly larger. The stirring effect of the stirrer 8 can effectively simulate turbulence in a water circulation system and enhance heat transfer. It also makes the test water sample inside the heating vessel 2 more uniform, improving the accuracy of the test.

[0026] Furthermore, the circulation pipeline 3 includes a first pipeline 3.1 and a second pipeline 3.2. The first pipeline 3.1 is arranged on the output side of the heating vessel 2, and the second pipeline 3.2 is arranged on the input side of the heating vessel 2. The input end of the first pipeline 3.1 is arranged sequentially along the flow direction of the test water sample with a third thermometer 21.3, a drive pump 20, a pressure gauge 22, and a check valve 23. The third thermometer 21.3 can detect the temperature at the input end of the first pipeline 3.1. The drive pump 20 can provide circulation power for the test water sample in the circulation pipeline 3 and the heating vessel 2. The pressure gauge 22 detects the water pressure in the circulation pipeline 3. The check valve 23 can prevent the test water sample in the circulation pipeline 3 from flowing back. In the main body of the first pipeline 3.1, a test branch 4 and a control branch 5 are arranged in parallel. In the main body of the first pipeline 3.1 and in front of the test branch 4 and the control branch 5, a first sampling valve 15.1, a first thermometer 21.1 and a flow meter 24 are also arranged. The first sampling valve 15.1 can sample the test water sample before it enters the branch. The first thermometer 21.1 can measure the temperature of the test water sample before it enters the branch. The flow meter 24 is used to measure the flow rate of the test water sample flowing through the circulation pipeline 3.

[0027] It should be noted that a drain pipe 16 is installed at the bottom of the heating vessel 2. Specifically, the drain pipe 16 is arranged horizontally, and the bottom of the heating vessel 2 is connected to the middle of the drain pipe 16. One end of the drain pipe 16 is connected to the input end of the first pipeline 3.1, and the other end of the drain pipe 16 is equipped with a drain valve 17. By opening the drain valve 17, the test water sample in the heating vessel 2 can be discharged. Arranging the first pipeline 3.1 and the drain pipe together can effectively simplify the pipeline layout of the device. It should also be noted that a shut-off valve 25 is installed between the drain pipe 16 and the third thermometer 21.3. When a drain operation is required, the shut-off valve 25 needs to be closed to prevent the test water sample from entering the circulation pipeline 3. When a test operation is required, the drain valve 27 is closed and the shut-off valve 25 is opened.

[0028] Furthermore, a scale inhibition and prevention device 6 is installed on the test branch 4. The scale inhibition and prevention device 6 is detachably connected to the test branch 4. The scale inhibition and prevention device 6 can reduce the amount of scale formation in the circulation pipe 3, thus achieving the effect of scale inhibition and prevention. In addition, a first ball valve 11.1 and a second ball valve 11.2 are arranged on the test branch 4 and on both sides of the scale inhibition and prevention device 6. The first ball valve 11.1 is located on the input side of the scale inhibition and prevention device 6, and the second ball valve 11.2 is located on the output side of the scale inhibition and prevention device 6. The first ball valve 11.1 and the second ball valve 11.2 can control the opening and closing of the test branch. A third ball valve 11.3 is installed on the control branch 5, which can control the opening and closing of the control branch 6.

[0029] Furthermore, a second sampling valve 15.2 is provided at the connection position of the first pipeline 3.1 and the second pipeline 3.2. The second sampling valve 15.2 can take a sample once before the test water sample enters the second pipeline 3.2 through the first pipeline 3.1 to detect the concentration of metal ions in the test water sample.

[0030] The second conduit 3.2 is a coiled conduit structure. Specifically, the second conduit 3.2 is composed of several connecting pipes 13 and U-shaped pipes 14 connected together. Specifically, the U-shaped pipe 14 acts as a connector, linking two connecting pipes 13 together to form an S-shaped coiled second conduit 3.2. The length direction of the U-shaped pipe 14 is horizontal, and the plane in which the U-shaped pipe 14 is located is either vertical or horizontal, such as... Figure 4 As shown, the connecting pipe 13 at the bottom of the second pipeline 3.2 is connected by a U-shaped pipe 14 and arranged vertically, while the connecting pipe 13 at the top of the second pipeline 3.2 is connected by a U-shaped pipe 14 and is in the same horizontal position. This results in two different pipeline configurations on the second pipeline 3.2, allowing for testing of the impact of vertically arranged connecting pipes 13 and horizontally connected connecting pipes 13 on scale inhibition and prevention performance, thus improving the measurement reliability of the testing device. It should be noted that a support frame 12 is installed at the bottom of the test bench 1, where the second pipeline 3.2 is located. Three sets of support frames 12 are arranged vertically, and the connecting pipes 13 on the second pipeline 3.2 are fixedly supported by the support members on the support frames 13, thereby improving the stability of the second pipeline 3.2.

[0031] A second thermometer 21.2 and a third sampling valve 15.3 are installed at the output end of the second pipe 3.2. The second thermometer 21.2 can detect the temperature of the test water sample after passing through the second pipe 3.2. By opening the third sampling valve 15.3 to take a sample, the concentration of metal ions in the test water sample after passing through the second pipe 3.2 can be detected. Finally, the output end of the second pipe 3.2 is connected to the input end of the heating vessel 2 to complete the circulation of the test water sample.

[0032] Furthermore, the heating vessel 2 is a jacketed electric heating vessel with heat transfer oil, the jacket (not shown in the figure) containing heat transfer oil. The heat transfer oil is heated by the heating element, and the heat transfer oil transfers heat to the test water sample inside the heating vessel 2 through the jacket, avoiding direct contact between the test water sample and the heating element, effectively preventing scale formation on the heating element from affecting the experimental accuracy. A cover plate 26 is installed on the top of the heating vessel 2, with a sealing strip on the cover plate 26, and it is sealed to the heating vessel 2 with a snap-fit ​​mechanism to prevent the test water sample from evaporating and decreasing. In addition, multiple sets of evenly distributed hanging rods 7 are installed inside the heating vessel 2, arranged in a ring at equal intervals. The hanging rods 7 are fixed to the bracket inside the heating vessel 2 with nuts. Multiple sets of holes are evenly distributed on the hanging rods 7 for fixing the hanging rod assembly. The hanging rods 7 and nuts are made of polytetrafluoroethylene or other non-metallic materials, thereby avoiding contact between the hanging rods and metal materials, which could affect the experimental data.

[0033] Example 2: As Figures 1 to 5 The scale inhibition and prevention device shown includes a stand 1, a heating vessel 2 and a circulation pipeline 3 arranged on the top of the stand 1. The two ends of the circulation pipeline 3 are connected to the input end and the output end of the heating vessel 2, respectively, so as to realize the circulation of the test water sample in the heating vessel 2. A test branch 4 and a control branch 5 are set in the circulation pipeline 3, and a scale inhibition and prevention device 6 is set on the test branch 4. The performance of the scale inhibition and prevention device 6 is tested by circulating the test water sample in the two branches respectively.

[0034] Specifically, the frame 1 is a rectangular support structure, with four legs formed by horizontally and vertically arranged rods. A heating vessel 2 is positioned at the top center of the frame 1. The upper part of the heating vessel 2 is cylindrical, and the lower part is elliptical. A support plate is arranged at the junction of the cylindrical and elliptical structures and along the circumference of the heating vessel 2. The support plate is fixed to the top of the frame 1 using screws. A heating assembly (not shown in the figure) is installed inside the heating vessel 2. This heating assembly heats the test water sample inside the heating vessel 2 to a set temperature, simulating the temperature in a water circulation system. At the bottom of the frame 1, a support base 18 and casters are also provided. The support base 18 supports the frame 1 and is threadedly connected to the bottom of the frame 1. The support height of the support base 18 can be adjusted, and four sets of support bases 18 are arranged at the four corners of the frame 1. The caster set includes four casters 19, which are arranged in relation to the positions of the four support bases 18. The casters 19 facilitate the handling and movement of the testing device.

[0035] Furthermore, a stirring assembly is also provided inside the heating vessel 2. Specifically, the stirring assembly includes a drive device 10, a stirring shaft 9, and a stirrer 8. The drive device 10 is located above the platform 1 and is fixedly connected to the platform 1. The drive device 10 is also located outside the stirring vessel 2. The output end of the drive device 10 is connected to the stirring shaft 9 and can drive the stirring shaft 9 to rotate. The end of the stirring shaft 9 away from the drive device 10 extends into the stirring vessel 2. The stirring shaft 9 and the stirring vessel 2 are sealed to prevent the test water sample in the heating vessel 2 from leaking out from the connection between the stirring shaft 9 and the heating vessel 2. A stirrer 8 is located on one side of the heating vessel, inside the stirring shaft 9. The stirrer 8 is positioned along the axis of the heating vessel 2 and has a fan-shaped hollow structure; that is, the outer periphery of the stirrer 8 is a fan-shaped frame, while the interior is hollow. This effectively reduces the weight of the stirrer 8. Furthermore, the width direction of the stirrer 8 (the direction in which the fan-shaped structure unfolds) is parallel to the direction of the stirring shaft 9, which effectively increases the stirring area of ​​the stirrer 8. To ensure the stirring effect, the radial dimension of the arc segment of the stirrer 8 can be designed to be slightly larger. The stirring effect of the stirrer 8 can effectively simulate turbulence in a water circulation system and enhance heat transfer. It also makes the test water sample inside the heating vessel 2 more uniform, improving the accuracy of the test.

[0036] Furthermore, the circulation pipeline 3 includes a first pipeline 3.1 and a second pipeline 3.2. The first pipeline 3.1 is arranged on the output side of the heating vessel 2, and the second pipeline 3.2 is arranged on the input side of the heating vessel 2. The input end of the first pipeline 3.1 is arranged sequentially along the flow direction of the test water sample with a third thermometer 21.3, a drive pump 20, a pressure gauge 22, and a check valve 23. The third thermometer 21.3 can detect the temperature at the input end of the first pipeline 3.1. The drive pump 20 can provide circulation power for the test water sample in the circulation pipeline 3 and the heating vessel 2. The pressure gauge 22 detects the water pressure in the circulation pipeline 3. The check valve 23 can prevent the test water sample in the circulation pipeline 3 from flowing back. In the main body of the first pipeline 3.1, a test branch 4 and a control branch 5 are arranged in parallel. In the main body of the first pipeline 3.1 and in front of the test branch 4 and the control branch 5, a first sampling valve 15.1, a first thermometer 21.1 and a flow meter 24 are also arranged. The first sampling valve 15.1 can sample the test water sample before it enters the branch. The first thermometer 21.1 can measure the temperature of the test water sample before it enters the branch. The flow meter 24 is used to measure the flow rate of the test water sample flowing through the circulation pipeline 3.

[0037] It should be noted that a drain pipe 16 is installed at the bottom of the heating vessel 2. Specifically, the drain pipe 16 is arranged horizontally, and the bottom of the heating vessel 2 is connected to the middle of the drain pipe 16. One end of the drain pipe 16 is connected to the input end of the first pipeline 3.1, and the other end of the drain pipe 16 is equipped with a drain valve 17. By opening the drain valve 17, the test water sample in the heating vessel 2 can be discharged. Arranging the first pipeline 3.1 and the drain pipe together can effectively simplify the pipeline layout of the device. It should also be noted that a shut-off valve 25 is installed between the drain pipe 16 and the third thermometer 21.3. When a drain operation is required, the shut-off valve 25 needs to be closed to prevent the test water sample from entering the circulation pipeline 3. When a test operation is required, the drain valve 27 is closed and the shut-off valve 25 is opened.

[0038] Furthermore, a scale inhibition and prevention device 6 is installed on the test branch 4. The scale inhibition and prevention device 6 is detachably connected to the test branch 4. The scale inhibition and prevention device 6 can reduce the amount of scale formation in the circulation pipe 3, thus achieving the effect of scale inhibition and prevention. In addition, a first ball valve 11.1 and a second ball valve 11.2 are arranged on the test branch 4 and on both sides of the scale inhibition and prevention device 6. The first ball valve 11.1 is located on the input side of the scale inhibition and prevention device 6, and the second ball valve 11.2 is located on the output side of the scale inhibition and prevention device 6. The first ball valve 11.1 and the second ball valve 11.2 can control the opening and closing of the test branch. A third ball valve 11.3 is installed on the control branch 5, which can control the opening and closing of the control branch 6.

[0039] Furthermore, a second sampling valve 15.2 is provided at the connection position of the first pipeline 3.1 and the second pipeline 3.2. The second sampling valve 15.2 can take a sample once before the test water sample enters the second pipeline 3.2 through the first pipeline 3.1 to detect the concentration of metal ions in the test water sample.

[0040] The second conduit 3.2 is a coiled conduit structure. Specifically, the second conduit 3.2 is composed of several connecting pipes 13 and U-shaped pipes 14 connected together. Specifically, the U-shaped pipe 14 acts as a connector, linking two connecting pipes 13 together to form an S-shaped coiled second conduit 3.2. The length direction of the U-shaped pipe 14 is horizontal, and the plane in which the U-shaped pipe 14 is located is either vertical or horizontal, such as... Figure 4As shown, the connecting pipe 13 at the bottom of the second pipeline 3.2 is connected by a U-shaped pipe 14 and arranged vertically, while the connecting pipe 13 at the top of the second pipeline 3.2 is connected by a U-shaped pipe 14 and is in the same horizontal position. This results in two different pipeline configurations on the second pipeline 3.2, allowing for testing of the impact of vertically arranged connecting pipes 13 and horizontally connected connecting pipes 13 on scale inhibition and prevention performance, thus improving the measurement reliability of the testing device. It should be noted that a support frame 12 is installed at the bottom of the test bench 1, where the second pipeline 3.2 is located. Three sets of support frames 12 are arranged vertically, and the connecting pipes 13 on the second pipeline 3.2 are fixedly supported by the support members on the support frames 13, thereby improving the stability of the second pipeline 3.2.

[0041] It should be noted that in this embodiment, the connecting pipe 13 is a variable diameter pipe. Along the flow direction of the test water sample in the second pipeline 3.2, the diameter of the connecting pipe 13 gradually increases or decreases. The variable diameter pipe design of the connecting pipe 13 can break the laminar flow phenomenon in the traditional test pipeline, and at the same time, it can make the flow velocity different at different positions in the connecting pipe 13, so as to test the performance of the scale inhibition and scale prevention equipment under different flow velocities of the test water sample.

[0042] A second thermometer 21.2 and a third sampling valve 15.3 are installed at the output end of the second pipe 3.2. The second thermometer 21.2 can detect the temperature of the test water sample after passing through the second pipe 3.2. By opening the third sampling valve 15.3 to take a sample, the concentration of metal ions in the test water sample after passing through the second pipe 3.2 can be detected. Finally, the output end of the second pipe 3.2 is connected to the input end of the heating vessel 2 to complete the circulation of the test water sample.

[0043] Furthermore, the heating vessel 2 is a jacketed electric heating vessel with heat transfer oil, the jacket (not shown in the figure) containing heat transfer oil. The heat transfer oil is heated by the heating element, and the heat transfer oil transfers heat to the test water sample inside the heating vessel 2 through the jacket, avoiding direct contact between the test water sample and the heating element, effectively preventing scale formation on the heating element from affecting the experimental accuracy. A cover plate 26 is installed on the top of the heating vessel 2, with a sealing strip on the cover plate 26, and it is sealed to the heating vessel 2 with a snap-fit ​​mechanism to prevent the test water sample from evaporating and decreasing. In addition, multiple sets of evenly distributed hanging rods 7 are installed inside the heating vessel 2, arranged in a ring at equal intervals. The hanging rods 7 are fixed to the bracket inside the heating vessel 2 with nuts. Multiple sets of holes are evenly distributed on the hanging rods 7 for fixing the hanging rod assembly. The hanging rods 7 and nuts are made of polytetrafluoroethylene or other non-metallic materials, thereby avoiding contact between the hanging rods and metal materials, which could affect the experimental data.

[0044] In addition, a control system 27 is installed on the test bench 1, and a temperature transmitter 28 and a level transmitter 29 are installed at the bottom of the heating vessel 2. The temperature transmitter 28 monitors the temperature of the test water sample in the heating vessel 2 and sends the temperature signal to the control system 27. The level transmitter 29 monitors the liquid level of the test water sample in the heating vessel 2 and sends the liquid level signal to the control system 27. The control system 27 includes electronic components such as a PLC controller, a touch screen, a circuit breaker, a frequency converter, and a temperature controller. The control system 27 receives temperature signals, liquid level signals, flow signals, and controls the heating power, stirring power, and power of the drive pump 20. The control system 27 adjusts the heating power of the heating vessel 2 according to the temperature signal from the temperature transmitter 28 and ensures that the temperature of the test water sample in the heating vessel 2 is maintained at the test set value. The control system 27 receives the liquid level signal from the level transmitter 29, and stops heating of the heating vessel 2 and operation of the drive pump 20 when the liquid level signal is lower than the set value. The control system 27 controls the power of the water pump based on the flow signal from the flow meter 24 to ensure that the flow rate of the test water sample is maintained at the test set value.

[0045] Example 3: A method for testing the performance of scale inhibition and prevention equipment, implemented using the scale inhibition and prevention equipment performance testing device in Example 1 or Example 2, including scale inhibition test of alloy scale inhibition and prevention equipment and scale removal test of alloy scale inhibition and prevention equipment.

[0046] The scale inhibition test procedure for alloy scale inhibition and prevention equipment is as follows.

[0047] (1) Alloy scale inhibition test: Weigh each section of the connecting pipe 13 and the hanging plate, and install them on the test platform. Place the test water sample in the heating vessel 2, turn on the heating vessel 2 and the driving device 10, so that the test water sample reaches the set test temperature. Open the first ball valve 11.1 and the second ball valve 11.2, close the third ball valve 11.3, and turn on the driving pump 20 to circulate the test water sample through the test branch 4. During the circulation process, open the first sampling valve 15.1, the second sampling valve 15.2, and the third sampling valve 15.3 at regular intervals to take samples and measure the Ca content of the test water sample. 2+ Concentration and record. After circulation, disassemble connecting pipe 13, measure and record the total weight of each pipe section and scale, remove the hanging plate, measure and record its weight. Clean some scale from connecting pipe 13 and observe its crystal structure. After the experiment, clean heating vessel 2 and circulation pipe 3.

[0048] (2) Blank test: Replace the connecting pipe 13 and the hanging plate, weigh each section of the connecting pipe 13 and the hanging plate, and install them on the test platform. Prepare the test water sample in the heating vessel 2, turn on the heating and driving device 10 of the heating vessel 2, and bring the test water sample to the set test temperature. Close the first ball valve 11.1 and the second ball valve 11.2, open the third ball valve 11.3, and turn on the driving pump 20 to circulate the test water sample through the control branch 5. During the circulation process, open the first sampling valve 15.1, the second sampling valve 15.2, and the third sampling valve 15.3 at regular intervals to take samples and measure the Ca of the test water sample. 2+ Concentration and record. After circulation, disassemble connecting pipe 13, measure and record the total weight of each pipe section and scale, remove the hanging plate, measure and record its weight. Clean some scale from connecting pipe 13 and observe its crystal structure. After the experiment, clean heating vessel 2 and circulation pipe 3.

[0049] (3) By comparing the weight of each section of the pipe and connecting pipe 13 before and after the alloy scale inhibition test and the blank test, and the Ca at different time periods in the two sets of tests, 2+ The scale inhibition effect of the alloy scale inhibitor was evaluated by considering the concentration changes and the crystal structure of scale in the two sets of experiments.

[0050] The descaling test steps for alloy scale inhibitor and prevention equipment are as follows.

[0051] (1) Scale formation process: Weigh each section of the connecting pipe 13 and the hanging plate, and install them on the test platform. Prepare the test water sample in the heating vessel 2, turn on the heating and driving device 10 of the heating vessel 2, and make the test water sample reach the test set temperature value. Close the first ball valve 11.1 and the second ball valve 11.2, open the third ball valve 11.3, and turn on the driving pump 20 to make the test water sample circulate through the control branch 5. Stop the circulation when a stable and solid scale layer is formed on the circulation pipe 3 and the hanging plate. Disassemble the connecting pipe 13, clean some of the scale in the connecting pipe 13 and observe its crystal structure. Measure and record the total weight of each section of pipe and scale, remove the hanging plate, measure its weight and record it.

[0052] (2) Descaling test: Reinstall the connecting pipe 13 and the mounting plate. Open the first ball valve 11.1 and the second ball valve 11.2, close the third ball valve 11.3, and start the drive pump 20 to circulate the test water sample through the test branch 1. During the circulation process, open the first sampling valve 15.1, the second sampling valve 15.2, and the third sampling valve 15.3 at regular intervals to take samples and measure the Ca content of the test water sample. 2+Record the concentration. After circulation, disassemble connecting pipe 13, observe whether scale has detached, observe the crystal structure of the detached scale, collect and measure the weight of the detached scale. Measure and record the weight of each section of the pipe, remove the hanging plate, measure its weight and record it. After the experiment, clean the heating vessel 2 and circulation pipe 3.

[0053] (3) By comparing the weight of the hanging plate and each section of the connecting pipe 13 in the scaling test and blank test, the weight of the scale that fell off, and the Ca at different time periods in the descaling test, the results were obtained. 2+ The descaling effect of alloy anti-scaling equipment is evaluated by concentration changes.

[0054] The scale inhibition and scale prevention performance of alloy scale inhibitors was evaluated by setting different parameters such as flow rate and temperature of test water samples. The performance influencing factors were investigated by replacing alloy scale inhibitors with different metal element ratios and structures.

Claims

1. A performance testing device for scale inhibition and prevention equipment, characterized in that, The device includes a frame on which a heating vessel is mounted. A stirring assembly is installed inside the heating vessel. A circulation pipeline is connected to the heating vessel. The circulation pipeline is coiled around the frame. The circulation pipeline includes a test branch and a scale-inhibiting device is detachably connected to the test branch. A hanging plate tie rod is arranged vertically and distributed in a ring along the inside of the heating vessel.

2. The scale inhibition and prevention equipment performance testing device according to claim 1, characterized in that, The stirring assembly is inserted laterally into the heating vessel. The heating assembly includes a stirrer, the width of which is parallel to the stirring axis.

3. The scale inhibition and prevention equipment performance testing device according to claim 1, characterized in that, The circulation pipeline includes a first pipeline, which includes a test branch and a control branch arranged in parallel, and ball valve assemblies are provided on the test branch and the control branch.

4. The scale inhibition and prevention equipment performance testing device according to claim 3, characterized in that, The circulation pipeline also includes a second pipeline connected to the first pipeline. The platform is provided with a support frame, and the second pipeline is arranged in an S-shape around the support frame.

5. The scale inhibition and prevention equipment performance testing device according to claim 4, characterized in that, The second conduit is composed of several detachable connecting pipes, which are connected by U-shaped pipes.

6. The scale inhibition and prevention equipment performance testing device according to claim 5, characterized in that, The diameter of the connecting pipe varies along the pipeline direction.

7. A scale inhibition and scale prevention equipment performance testing device according to any one of claims 4 to 6, characterized in that, The first pipeline is equipped with a first sampling valve and a second sampling valve at both its input and output ends, and the second pipeline is equipped with a third sampling valve at its output end.

8. A scale inhibition and scale prevention equipment performance testing device according to any one of claims 3 to 6, characterized in that, The bottom of the heating vessel is connected to a vent pipe, the middle of which is connected to the heating vessel. One end of the vent pipe is equipped with a vent valve, and the other end of the vent pipe is connected to the first pipeline.

9. A scale inhibition and scale prevention equipment performance testing device according to any one of claims 1 to 6, characterized in that, The platform is equipped with a drive pump, which is located on the circulation pipeline. The bottom of the platform is equipped with a support base and a set of casters.

10. A method for testing the performance of scale inhibition and prevention equipment, characterized in that, The performance testing device for scale inhibition and prevention equipment as described in any one of claims 4 to 9 is used, and includes the following steps: S1: Heat the test water sample in the heating vessel to the set temperature; S2: Open the ball valves on the test branch and the control branch in sequence to circulate the test water sample; S3: During the test water sample circulation process, samples are taken at the input and output ends of the first pipeline and the output end of the second pipeline at regular intervals. S4: Compare the weight and metal ion concentration of the circulation pipeline before and after the test branch and the control branch, and evaluate the effectiveness of the scale crystal structure evaluation equipment in the two groups of tests.

Images