A dynamic evaluation system for scale inhibitors

Abstract

This application belongs to the field of scale inhibitor performance evaluation, specifically a dynamic evaluation system for scale inhibitors. The system includes a water tank, a circulation unit, and a heating unit. The top of the water tank is open, and the tank has a receiving cavity for storing water samples. The circulation unit has an input end and an output end, both of which are connected to the receiving cavity. The water tank also has a first inlet for inputting anion-containing solutions, a second inlet for inputting cation-containing solutions, and a third inlet for inputting scale inhibitors. The heating unit is suspended in the receiving cavity by a support member, and a removable collection sleeve is fitted onto the heating unit. This system allows scale samples to deposit on the collection sleeve by fitting it onto the heating unit. After operation, the scale sample can be easily and quickly obtained for testing by removing the collection sleeve. By comparing the weight gain of the collection sleeve under different scale inhibitors and combining this with the scale sample test results, the scale inhibition effect of the scale inhibitor can be directly characterized.

Description

Technical Field

[0001] This application belongs to the field of scale inhibitor performance evaluation, specifically a scale inhibitor dynamic evaluation system. Background Technology

[0002] Closed-loop water circulation systems are an effective measure for reducing wastewater discharge in the paper industry. However, as the number of water circulation cycles increases, scale-forming ions in the water accumulate and deposit on the surface of system equipment after reaching a certain level, leading to problems such as increased energy consumption and low wastewater utilization. Adding scale inhibitors to the water system to control scale formation is the most efficient and economical way to solve the above problems. It is of great significance for energy conservation, emission reduction and environmental protection, mainly reflected in the following aspects: (1) reducing scale formation in pulp conveying pipelines, washing and screening equipment, reducing the cost of cleaning and maintaining equipment, and increasing production efficiency; (2) improving the heat transfer efficiency of heat exchange equipment and reducing energy consumption; (3) improving the water recycling rate, that is, reducing wastewater discharge and fresh water consumption, thereby saving water resources and protecting the environment. At present, scale inhibitors are widely used in cooling circulating water, power, metallurgy, seawater desalination and other industries. Unlike the above application scenarios, pulp and paper wastewater contains a large amount of organic matter and suspended solids, as well as a large amount of chemicals and impurities. At the same time, the operating conditions of the water circulation system are complex and variable. Choosing an efficient, rapid, and systematic method for evaluating scale inhibition and dispersion performance, and selecting suitable and effective scale inhibitors and dispersants, is of great significance for the stable and long-term operation of water circulation systems.

[0003] Therefore, the technical problem to be solved by this application is: how to facilitate the collection of scale samples while simulating the actual operating conditions of water systems in the pulping and papermaking fields, so as to intuitively characterize the scale inhibition effect of scale inhibitors. Utility Model Content

[0004] The purpose of this application is to solve the above problems and provide a dynamic evaluation system for scale inhibitors. This system uses a removable collection sleeve on the heating unit to allow scale samples to deposit on the collection sleeve. After operation, the scale sample can be easily and quickly obtained for testing by removing the collection sleeve. At the same time, by comparing the weight increase of the collection sleeve under the action of different scale inhibitors, and in conjunction with the test results of the scale sample, the scale inhibition effect of the scale inhibitor can be intuitively characterized.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A scale inhibitor dynamic evaluation system includes a water tank, a circulation unit, and a heating unit. The top of the water tank is open, and the water tank has a receiving cavity for storing water samples.

[0007] The circulation unit has an input end and an output end, both of which are connected to the containment cavity. The circulation unit is used to make the water sample flow horizontally within the containment cavity.

[0008] The water tank also has a first inlet for introducing anionic solutions, a second inlet for introducing cationic solutions, and a third inlet for introducing scale inhibitors; the anionic and cationic solutions can combine to form a precipitate that is insoluble in the water sample;

[0009] There is at least one heating unit, which is suspended in the receiving cavity by a support and is at least partially immersed in the water sample. A removable collection sleeve is fitted on the heating unit.

[0010] Preferably, the support is a plate that overlaps the top of the water tank and is used to close the receiving cavity. There are multiple heating units arranged in a rectangular array on the plate, and the heating units are detachably connected to the plate.

[0011] Preferably, the heating unit includes a heating plate and a heat insulation component. The heating plate has two terminals with screwed nuts. The plate has vertically arranged mounting holes, the positions of which correspond one-to-one with the positions of the terminals. The heat insulation component is sleeved on the terminals, and the terminals pass through the mounting holes via the heat insulation component. The terminals pass through the mounting holes and are connected to the plate via nuts. The terminals are used to connect to external power supply lines.

[0012] Preferably, the collecting sleeve has a cuboid structure with an open top. The collecting sleeve contains a chamber matching the size of the heating plate. It also has a U-shaped connecting piece with an opening and a closing portion. Each of the two ends of the connecting piece along its length has a first connecting hole. On opposite sides of the collecting sleeve, there are second connecting holes matching the first connecting holes. The connecting piece is installed on the collecting sleeve from the top through the opening, at which point the first and second connecting holes are aligned and connected by external bolts. The closing portion seals off the top of the collecting sleeve. The collecting sleeve is made of 316 stainless steel, 316L stainless steel, or titanium alloy.

[0013] Preferably, the water tank has a first connecting pipe and a second connecting pipe. The first connecting pipe is located at one end of the water tank along its length, and the second connecting pipe is located at the bottom of the water tank and arranged away from the first connecting pipe. The input end is connected to the second connecting pipe, and the output end is connected to the first connecting pipe.

[0014] Preferably, the circulation unit includes a first peristaltic pump and a first hose. One end of the first hose is an input end and the other end is an output end along its length. The pump head of the first peristaltic pump is connected to the first hose. The first peristaltic pump is used to squeeze the first hose so that the first hose transports the water sample in the receiving cavity from the second connecting pipe to the first connecting pipe.

[0015] Preferably, the scale inhibitor dynamic evaluation system also includes a temperature probe, and the water tank also has a third connecting pipe, which is located at the bottom of the water tank and communicates with the receiving cavity. The temperature probe is connected to the third connecting pipe and extends into the receiving cavity.

[0016] Preferably, the scale inhibitor dynamic evaluation system further includes an annular baffle and a cover plate. The annular baffle is connected to the top of the plate body, and the outer edge of the annular baffle matches the shape of the outer edge of the plate body. The annular baffle and the plate body cooperate to form a top-open receiving groove for accommodating power supply lines. The cover plate is hinged to the annular baffle and is used to close the top of the receiving groove. A plug for connecting to an external power supply device is provided at one end of the annular baffle along its length direction. The heating plate and the plug are electrically connected through the power supply lines.

[0017] Preferably, the scale inhibitor dynamic evaluation system further includes two baffles, each with multiple through holes. The inner wall of the water tank is provided with four slots, which are evenly distributed on opposite inner wall surfaces in the water tank and arranged in pairs. The two ends of the baffle along its length are respectively connected to the oppositely arranged slots. The receiving cavity is divided into a first region, a second region, and a third region arranged sequentially along its length by the two baffles. The first infusion end is located in the first region, the heating unit is located in the second region, and the second and third infusion ends are both located in the third region.

[0018] Preferably, the scale inhibitor dynamic evaluation system further includes a first input unit, a second input unit, a third input unit, and a frame, with the water tank placed on the frame;

[0019] The first input unit includes a second peristaltic pump, a second hose, and a first storage tank. One end of the second hose is connected to the first storage tank, and the other end is connected to the first infusion end. The pump head of the second peristaltic pump is connected to the second hose. The first storage tank is used to store solutions containing scale-forming anions.

[0020] The second input unit includes a third peristaltic pump, a third hose, and a second storage tank. One end of the third hose is connected to the second storage tank, and the other end is connected to the second infusion end. The pump head of the third peristaltic pump is connected to the third hose. The second storage tank is used to store solutions containing scale-forming cations.

[0021] The third input unit includes a fourth peristaltic pump, a fourth hose, and a third storage tank. One end of the fourth hose is connected to the third storage tank, and the other end is connected to the third infusion end. The pump head of the fourth peristaltic pump is connected to the fourth hose, and the third storage tank is used to store scale inhibitor.

[0022] Compared with the prior art, the beneficial effects of this application are:

[0023] This system uses a removable collection sleeve fitted onto the heating unit to allow scale to deposit on the sleeve. After operation, the scale can be easily and quickly obtained for testing by removing the collection sleeve. Furthermore, by comparing the weight gain of the collection sleeve under different scale inhibitors, and in conjunction with the scale test results, the scale inhibition effect of the scale inhibitor can be directly characterized. Attached Figure Description

[0024] Figure 1 This is a three-dimensional view of the scale inhibitor dynamic evaluation system of Example 1;

[0025] Figure 2 This is a front view (with hose) of the scale inhibitor dynamic evaluation system of Example 1;

[0026] Figure 3 This is a top view of the water tank of the scale inhibitor dynamic evaluation system in Example 1;

[0027] Figure 4 yes Figure 3 A sectional view;

[0028] Figure 5 This is a schematic diagram of the water tank structure of the scale inhibitor dynamic evaluation system of Example 1 without the cover plate;

[0029] Figure 6 This is a schematic diagram of the water tank structure of the scale inhibitor dynamic evaluation system of Example 1 without the plate body;

[0030] Figure 7 This is an exploded view of the heating unit of the scale inhibitor dynamic evaluation system in Example 1;

[0031] The labels for each item are as follows:

[0032] 1. Water tank; 2. Circulation unit; 3. Heating unit; 4. Support; 5. Collection sleeve; 6. Annular baffle; 7. Receiving tank; 8. Cover plate; 9. Frame; 11. Receiving cavity; 12. First infusion end; 13. Second infusion end; 14. Third infusion end; 15. First connecting pipe; 16. Second connecting pipe; 17. Baffle; 18. Fixing strip; 19. Third connecting pipe; 21. First peristaltic pump; 22. First hose; 31. Heating plate; 32. Heat insulation component; 33. Gasket; 41. Plate; 51. Chamber; 52. Second connecting hole; 53. Connecting piece; 54. Bolt; 61. Plug; 101. First input unit Second input unit 102; Third input unit 103; First area 111; Second area 112; Third area 113; Slot 181; Input terminal 221; Output terminal 222; Terminal 311; Nut 312; Mounting hole 411; First connecting hole 531; Second peristaltic pump 1011; Second hose 1012; First storage tank 1013; Third peristaltic pump 1021; Third hose 1022; Second storage tank 1023; Fourth peristaltic pump 1031; Fourth hose 1032; Third storage tank 1033; Hole A; Buckle B. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0034] Example 1

[0035] refer to Figures 1-7 A scale inhibitor dynamic evaluation system includes a water tank 1, a circulation unit 2, and a heating unit 3. The top of the water tank 1 is open, and the water tank 1 has a receiving cavity 11 for storing water samples.

[0036] The circulation unit 2 has an input end 221 and an output end 222. Both the input end 221 and the output end 222 are connected to the receiving cavity 11. The circulation unit 2 is used to make the water sample flow horizontally in the receiving cavity 11.

[0037] The water tank 1 also has a first inlet 12 for inputting anionic solutions, a second inlet 13 for inputting cationic solutions, and a third inlet 14 for inputting scale inhibitors; the anionic solutions and the cationic solutions can combine to form a precipitate that is insoluble in the water sample;

[0038] There is at least one heating unit 3, which is suspended in the receiving cavity 11 by a support member 4 and is at least partially immersed in the water sample. A removable collection sleeve 5 is fitted on the heating unit 3.

[0039] It's important to note that scale inhibitors work by using mechanisms such as chelation, dispersion, and lattice distortion to prevent scale-forming ions like calcium and magnesium in the water from precipitating and adhering to the equipment surface. Their core function is to interfere with the inorganic salt crystallization process, inhibiting scale formation, thereby improving heat exchange efficiency and extending equipment lifespan.

[0040] Therefore, in this embodiment, after the operator prepares the water sample and the heating unit 3, the water sample is allowed to flow horizontally in the receiving cavity 11 through the circulation unit 2. The solution containing anions and the solution containing cations are added separately, and the scale inhibitor is added separately, or simultaneously with the solution containing anions, or simultaneously with the solution containing cations. Specifically, the solution containing anions is added first, and the solution containing cations and the scale inhibitor are added later. The water sample is heated by the heating unit 3. The solution containing anions and the solution containing cations combine to form a precipitate that is difficult to dissolve in the water sample. Since the surface temperature of the heating unit 3 is higher than the temperature of the water sample, even if a collection sleeve 5 is fitted on the heating unit 3, the surface temperature of the collection sleeve 5 will still be higher than the temperature of the water sample. The precipitate will tend to deposit on the surface of the collection sleeve 5, which is scale.

[0041] After the operation is completed, the scale sample can be easily and quickly obtained by removing the collection sleeve 5. After drying the scale sample on the collection sleeve 5, the total weight of the collection sleeve 5 can be used as the amount of scale to compare the scale inhibition effect of different scale inhibitors. At the same time, some scale sample can be scraped off from the collection sleeve 5 for testing to compare the distortion effect of different scale inhibitors on scale sample crystals, which can intuitively characterize the scale inhibition effect of the scale inhibitor.

[0042] In this embodiment, the water sample used can be one of the following from pulping and papermaking processes: cooking waste liquor, bleaching wastewater, paper machine white water, cooling circulating water, or alkali recovery black liquor, or a water sample can be prepared according to experimental needs; solutions containing anions can be solutions containing CO3. 2- HCO3 - C2O4 2- PO4 3- SiO3 2- SO4 2- One or more aqueous solutions of the above; solutions containing cations can use solutions containing Ca. 2+ Mg 2+ Ba 2+ 、Sr 2+ Al 3+ One or more aqueous solutions.

[0043] Preferably, the support member 4 is a plate 41, which overlaps the top of the water tank 1 and is used to close the receiving cavity 11. There are multiple heating units 3, which are arranged in a rectangular array on the plate 41. The heating units 3 are detachably connected to the plate 41.

[0044] Specifically, the support member 4, using a plate 41, can not only serve as a support carrier for the heating unit 3, but also close the receiving cavity 11 from the top of the water tank 1. By using multiple heating units 3, the accuracy of the scale inhibitor evaluation can be ensured.

[0045] Furthermore, the heating unit 3 includes a heating plate 31 and a heat insulation component 32. The heating plate 31 has two terminals 311, and each terminal 311 has a screwed nut 312. The plate body 41 has vertically arranged mounting holes 411, and the positions of the mounting holes 411 correspond one-to-one with the positions of the terminals 311. The heat insulation component 32 is sleeved on the terminals 311, and the terminals 311 pass through the mounting holes 411 through the heat insulation component 32. The terminals 311 pass through the mounting holes 411 and are connected to the plate body 41 by the nuts 312. The terminals 311 are used to connect to external power supply lines.

[0046] Specifically, in this embodiment, the heating plate 31 is a cast aluminum heating plate 31. The specific structure can be found in the Baidu Encyclopedia. Its two terminals 311 are common knowledge in the field and are used to connect to the external power supply line. During installation, the heat insulation component 32 is sleeved on the terminal 311 and installed in the mounting hole 411 of the plate body 41 through the heat insulation component 32. Then, the output end 222 of the power supply line is sleeved on the terminal 311. The heating plate 31 is locked on the plate body 41 by the nut 312, while the nut 312 is electrically connected to the power supply line. In addition, if the mounting hole 411 is too large, a washer 33 can be added to assist the nut 312 in locking the heating plate 31. It should be noted that the washer 33 is made of conductive material. Regarding the structure of the heat insulation component 32, the heat insulation component 32 has an inverted T-shaped structure and is mainly made of heat insulation material. After being sleeved on the terminal block 311, the horizontal part of the heat insulation component 32, i.e. the horizontal part of the T-shape, contacts the top of the heating plate 31, while the vertical part of the heat insulation component 32, i.e. the vertical part of the T-shape, is sleeved on the terminal block 311. After locking the heating plate 31, the heating plate 31 and the plate body 41 clamp the horizontal part of the heat insulation component 32 to prevent the heating plate 31 and the plate body 41 from directly contacting each other and transferring heat to the plate body 41.

[0047] Furthermore, the collecting sleeve 5 has a cuboid structure with an open top. Inside the collecting sleeve 5, there is a chamber 51 that matches the size of the heating plate 31. The collecting sleeve 5 also has a U-shaped connecting piece 53 with an opening and a closing part. The connecting piece 53 has a first connecting hole 531 at both ends along its length. On the collecting sleeve 5, there are second connecting holes 52 on opposite sides that match the first connecting holes 531. The connecting piece 53 is installed on the collecting sleeve 5 from the top through the opening. At this time, the first connecting holes 531 and the second connecting holes 52 are in corresponding positions and are connected by an external bolt 54. The closing part closes the top of the collecting sleeve 5. The collecting sleeve 5 is made of 316 stainless steel, 316L stainless steel, or titanium alloy.

[0048] In a preferred embodiment, the collecting sleeve 5 is made of 316 stainless steel. The operator inserts the heating plate 31 into the collecting sleeve 5 through the cavity 51, ensuring the collecting sleeve 5 completely covers the portion except for the terminal block 311. Then, the connecting piece 53 is installed on the collecting sleeve 5. Specifically, the connecting piece 53 is connected to the collecting sleeve 5 through its opening. At this point, both sides of the collecting sleeve 5 are located within the connecting piece 53. The first connecting holes 531 at both ends of the connecting piece 53 match the second connecting holes 52 on both sides of the collecting sleeve 5, and are connected by bolts 54. Under the constraint of the connecting piece 53, the heating plate 31 is less likely to detach from the top of the collecting sleeve 5. In this embodiment, the connecting piece 53 is preferably made of the same material as the collecting sleeve 5.

[0049] In this embodiment, the water tank 1 has a first connecting pipe 15 and a second connecting pipe 16. The first connecting pipe 15 is located at one end of the water tank 1 along its length direction, and the second connecting pipe 16 is located at the bottom of the water tank 1 and arranged away from the first connecting pipe 15. The input end 221 is connected to the second connecting pipe 16, and the output end 222 is connected to the first connecting pipe 15.

[0050] Specifically, the first connecting pipe 15 and the second connecting pipe 16 should be positioned far apart from each other to ensure that the water sample in the receiving cavity 11 is closer to the actual working conditions when the circulation unit 2 is working, thus avoiding localized flow.

[0051] Furthermore, the circulation unit 2 includes a first peristaltic pump 21 and a first hose 22. One end of the first hose 22 along its length is an input end 221 and the other end is an output end 222. The pump head of the first peristaltic pump 21 is connected to the first hose 22. The first peristaltic pump 21 is used to squeeze the first hose 22 so that the first hose 22 transports the water sample in the receiving cavity 11 from the second connecting pipe 16 to the first connecting pipe 15.

[0052] In this embodiment, the first peristaltic pump 21 is a flow-type peristaltic pump, which can acquire flow information and adjust the flow rate in real time. For details on the specific structure and operation of the peristaltic pump, please refer to the description on Baidu Encyclopedia. Under the action of the first peristaltic pump 21, the water sample is transported from the second connecting pipe 16 to the first connecting pipe 15 through the first flexible tube 22, so that the water sample in the receiving cavity 11 is in a horizontal flow state.

[0053] The scale inhibitor dynamic evaluation system also includes a temperature probe (not shown in the figure), and the water tank 1 also has a third connecting pipe 19, which is located at the bottom of the water tank 1 and communicates with the receiving cavity 11. The temperature probe is sealed to the third connecting pipe 19 and extends into the receiving cavity 11.

[0054] The temperature probe is a temperature sensor and is connected to the external PLC control system to acquire the temperature of the water sample in real time. At the same time, the heating plate 31 is also connected to the external PLC control system to feed back the real-time temperature of the water sample to the heating plate 31 in order to adjust the temperature of the water sample.

[0055] Regarding the connection method of the temperature probe, a threaded temperature sensor can be used, that is, a thread is provided on the inner wall of the third connecting pipe 19, and the temperature probe is threadedly connected to the third connecting pipe 19.

[0056] Regarding the drainage of the water tank, the operator can drain the water from the third connecting pipe 19 by disconnecting the connection between the third connecting pipe 19 and the temperature probe.

[0057] Preferably, the scale inhibitor dynamic evaluation system further includes an annular baffle 6 and a cover plate 8. The annular baffle 6 is connected to the top of the plate 41, and the outer edge of the annular baffle 6 matches the shape of the outer edge of the plate 41. The annular baffle 6 and the plate 41 cooperate to form a top-open receiving groove 7, which is used to accommodate the power supply line. The cover plate 8 is hinged to the annular baffle 6 and is used to close the top of the receiving groove 7. A plug 61 for connecting to an external power supply device is provided at one end of the annular baffle 6 along its length direction. The heating plate 31 and the plug 61 are electrically connected through the power supply line.

[0058] More specifically, by connecting the annular baffle 6 to the plate 41, a receiving groove 7 for accommodating the power supply line can be formed on the plate 41 to ensure electrical safety. At the same time, the cover plate 8, which is hinged to the annular baffle 6, can swing to cover the annular baffle 6 and close the top of the receiving groove 7, further providing safety. The external power supply equipment can be connected to the plug 61 to supply power to the heating plate 31 through the plug 61 and the power supply line.

[0059] In addition, in this embodiment, a liquid level probe can also be provided. Regarding the method of setting the liquid level probe, a hole A can be opened on the annular baffle 6, and a hole A can also be opened on the plate 41. The liquid level probe passes through the annular baffle 6 and the plate 41 in sequence and extends into the receiving cavity 11, and is located below the liquid surface of the water sample.

[0060] In a preferred embodiment, a latch B can also be provided on the cover plate 8 and the annular baffle 6 to lock the cover plate 8 and improve security. Specifically, the structure and usage of the latch B can be found in the Baidu Encyclopedia entry. Therefore, details regarding the latch B will not be elaborated upon in this embodiment.

[0061] In this embodiment, the scale inhibitor dynamic evaluation system also includes two baffles 17, each with multiple through holes 171. The inner wall of the water tank 1 is provided with four slots 181, which are evenly distributed on opposite inner wall surfaces in the water tank 1 and arranged in pairs. The two ends of the baffles 17 along their length are respectively connected to the oppositely arranged slots 181. The receiving cavity 11 is divided by the two baffles 17 into a first region 111, a second region 112, and a third region 113 arranged sequentially along its length. The first infusion end 12 is located in the first region 111, the heating unit 3 is located in the second region 112, and the second infusion end 13 and the third infusion end 14 are both located in the third region 113.

[0062] During installation, the two ends of the baffle 17 are inserted into the slots 181 located on both sides of the receiving groove 7 according to the position of the corresponding slots 181. After the installation of the two baffles 17 is completed, the receiving cavity 11 is divided into a first region 111, a second region 112, and a third region 113 arranged sequentially along its length direction by the two baffles 17. Specifically, the solution containing anions is introduced into the first region 111, and the anions are transported from the through holes 171 on the baffle 17 to the second region 112 and the third region 113 by the horizontal flow of water. The solution containing cations and the scale inhibitor are transported to the third region 113 and then transported to the first region 111 by the first peristaltic pump 21. This ensures that the cations will better contact and react with the scale inhibitor.

[0063] In a preferred embodiment, the four slots 181 are formed by eight fixing strips 18, and the gap between each pair of fixing strips 18 is a slot 181. The fixing strips 18 are connected to the inner wall of the water tank 1 in a vertical arrangement.

[0064] In other embodiments, the slot 181 can also be formed by recessing the inner wall of the water tank 1 towards the outer wall.

[0065] In a specific implementation, the scale inhibitor dynamic evaluation system also includes a first input unit 101, a second input unit 102, a third input unit 103, and a frame 9, with the water tank 1 placed on the frame 9;

[0066] The first input unit 101 includes a second peristaltic pump 1011, a second hose 1012, and a first storage tank 1013. One end of the second hose 1012 is connected to the first storage tank 1013, and the other end is connected to the first infusion end 12. The pump head of the second peristaltic pump 1011 is connected to the second hose 1012. The first storage tank 1013 is used to store solutions containing scale-forming anions.

[0067] The second input unit 102 includes a third peristaltic pump 1021, a third hose 1022, and a second storage tank 1023. One end of the third hose 1022 is connected to the second storage tank 1023, and the other end is connected to the second infusion end 13. The pump head of the third peristaltic pump 1021 is connected to the third hose 1022. The second storage tank 1023 is used to store a solution containing scale-forming cations.

[0068] The third input unit 103 includes a fourth peristaltic pump 1031, a fourth hose 1032, and a third storage tank 1033. One end of the fourth hose 1032 is connected to the third storage tank 1033, and the other end is connected to the third infusion end 14. The pump head of the fourth peristaltic pump 1031 is connected to the fourth hose 1032. The third storage tank 1033 is used to store scale inhibitor.

[0069] In practical applications, regarding the connections between the first connecting tube 15, the second connecting tube 16 and the first flexible tube 22, the second flexible tube 1012 and the first infusion end 12, the third flexible tube 1022 and the second infusion end 13, and the fourth flexible tube 1032 and the third infusion end 14, due to the elasticity of the flexible tubes, a tight-fitting method can be used, or a sealing method can be used. Specifically, the sealing method includes a sealing gasket and a sealing cap. The sealing gasket is connected to the end faces of the first connecting tube 15, the second connecting tube 16, the first infusion end 12, the second infusion end 13, and the third infusion end 14, and the sealing gasket covers the inner hole of the above end faces. The sealing cap is connected to the first connecting tube 15, the second connecting tube 16, the first infusion end 12, the second infusion end 13, and the third infusion end 14 respectively to fix the sealing gasket. When connecting the corresponding flexible tubes, the flexible tubes pass through the sealing cap and the sealing gasket in sequence, and the sealing gasket abuts against the outer peripheral wall of the flexible tube.

[0070] The other end of the second hose 1012 extends into the first storage tank 1013, the other end of the third hose 1022 extends into the second storage tank 1023, and the other end of the fourth hose 1032 extends into the third storage tank 1033. This method facilitates the replacement of different scale inhibitors and the replenishment of solutions containing anions and solutions containing cations.

[0071] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A dynamic evaluation system for scale inhibitors, characterized in that, It includes a water tank, a circulation unit, and a heating unit. The top of the water tank is open, and the water tank has a receiving cavity for storing water samples. The circulation unit has an input end and an output end, both of which are connected to the receiving cavity. The circulation unit is used to make the water sample flow horizontally within the receiving cavity. The water tank also has a first inlet for inputting an anion-containing solution, a second inlet for inputting a cation-containing solution, and a third inlet for inputting a scale inhibitor; the anion-containing solution and the cation-containing solution can combine to form a precipitate that is insoluble in the water sample; The heating unit is at least one, and the heating unit is suspended in the receiving cavity by a support member and is at least partially immersed in the water sample. The heating unit is fitted with a removable collection sleeve.

2. The scale inhibitor dynamic evaluation system according to claim 1, characterized in that, The support is a plate that overlaps the top of the water tank and is used to close the receiving cavity. There are multiple heating units arranged in a rectangular array on the plate, and the heating units are detachably connected to the plate.

3. The scale inhibitor dynamic evaluation system according to claim 2, characterized in that, The heating unit includes a heating plate and a heat insulation component. The heating plate has two terminals with screwed nuts. The plate has vertically arranged mounting holes, the positions of which correspond one-to-one with the positions of the terminals. The heat insulation component is sleeved on the terminals, and the terminals pass through the mounting holes via the heat insulation component. The terminals penetrate the mounting holes and are connected to the plate via the nuts. The terminals are used to connect to an external power supply line.

4. The scale inhibitor dynamic evaluation system according to claim 3, characterized in that, The collecting sleeve has a cuboid structure with an open top. It contains a chamber matching the size of the heating plate and a U-shaped connecting piece. The connecting piece has an opening and a closing portion. Each of its two ends along its length has a first connecting hole. On opposite sides of the collecting sleeve, there are second connecting holes matching the first connecting holes. The connecting piece is installed on the collecting sleeve from the top through the opening, with the first and second connecting holes aligned. It is connected by external bolts. The closing portion seals off part of the top of the collecting sleeve. The collecting sleeve is made of 316 stainless steel, 316L stainless steel, or titanium alloy.

5. The scale inhibitor dynamic evaluation system according to claim 1, characterized in that, The water tank has a first connecting pipe and a second connecting pipe. The first connecting pipe is located at one end of the water tank along its length, and the second connecting pipe is located at the bottom of the water tank and arranged away from the first connecting pipe. The input end is connected to the second connecting pipe, and the output end is connected to the first connecting pipe.

6. The scale inhibitor dynamic evaluation system according to claim 5, characterized in that, The circulation unit includes a first peristaltic pump and a first hose. One end of the first hose along its length is the input end and the other end is the output end. The pump head of the first peristaltic pump is connected to the first hose. The first peristaltic pump is used to squeeze the first hose so that the first hose transports the water sample in the receiving cavity from the second connecting pipe to the first connecting pipe.

7. The scale inhibitor dynamic evaluation system according to claim 1, characterized in that, The scale inhibitor dynamic evaluation system also includes a temperature probe, and the water tank also has a third connecting pipe, which is located at the bottom of the water tank and communicates with the receiving cavity. The temperature probe is connected to the third connecting pipe and extends into the receiving cavity.

8. The scale inhibitor dynamic evaluation system according to claim 3, characterized in that, The scale inhibitor dynamic evaluation system also includes an annular baffle and a cover plate. The annular baffle is connected to the top of the plate body, and the outer edge of the annular baffle matches the shape of the outer edge of the plate body. The annular baffle and the plate body cooperate to form a top-open receiving groove for accommodating the power supply line. The cover plate is hinged to the annular baffle and is used to close the top of the receiving groove. A plug for connecting to an external power supply device is provided at one end of the annular baffle along its length direction. The heating plate and the plug are electrically connected through the power supply line.

9. The scale inhibitor dynamic evaluation system according to claim 1, characterized in that, The scale inhibitor dynamic evaluation system also includes two baffles, each with multiple through holes. The inner wall of the water tank has four slots, which are evenly distributed on opposite inner wall surfaces in the water tank and arranged in pairs. The two ends of the baffle along its length are respectively connected to the opposite slots. The receiving cavity is divided into a first region, a second region, and a third region arranged sequentially along its length by the two baffles. The first infusion end is located in the first region, the heating unit is located in the second region, and both the second and third infusion ends are located in the third region.

10. The scale inhibitor dynamic evaluation system according to claim 1, characterized in that, The scale inhibitor dynamic evaluation system also includes a first input unit, a second input unit, a third input unit, and a frame, with the water tank placed on the frame; The first input unit includes a second peristaltic pump, a second hose, and a first storage tank. One end of the second hose is connected to the first storage tank, and the other end is connected to the first infusion end. The pump head of the second peristaltic pump is connected to the second hose. The first storage tank is used to store a solution containing scale-forming anions. The second input unit includes a third peristaltic pump, a third hose, and a second storage tank. One end of the third hose is connected to the second storage tank, and the other end is connected to the second infusion end. The pump head of the third peristaltic pump is connected to the third hose. The second storage tank is used to store a solution containing scale-forming cations. The third input unit includes a fourth peristaltic pump, a fourth hose, and a third storage tank. One end of the fourth hose is connected to the third storage tank, and the other end is connected to the third infusion end. The pump head of the fourth peristaltic pump is connected to the fourth hose. The third storage tank is used to store scale inhibitor.

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