An experimental system for simulating a hot salt heat exchanger device for regeneration of waste alkylation acid

Abstract

The utility model discloses a kind of experimental systems of simulation alkylated waste acid regeneration molten salt heat exchanger device, for testing the corrosion rate of test piece, including heating titration unit and data measurement and control unit;The heating titration unit includes reagent bottle, incubator and reagent delivery system, the data measurement and control unit includes flow temperature controller;The reagent delivery system one end of reagent bottle liquid outlet is located in the upper of test piece another end, heating rod is fixed in the incubator;Flow temperature controller and the heating rod are electrically connected and control heating rod heating;When experiment, the test piece is sleeved in the outer lateral wall of heating rod, and the reagent delivery system transports reagent in reagent bottle to test piece.The experimental system provided by the utility model, by heating titration unit and data measurement and control unit cooperation, accurately control sulfuric acid flow rate and test piece temperature, realize the test effect of simulation actual high-temperature sulfuric acid working condition.

Description

Technical Field

[0001] This utility model relates to the field of corrosion testing technology for petrochemical equipment, specifically to an experimental system for simulating the working environment of a molten salt heat exchanger during the regeneration of alkylation waste acid. Background Technology

[0002] In the petroleum processing industry, alkylation is a key technology for producing high-octane alkylate oils. This process typically uses concentrated sulfuric acid or hydrofluoric acid as a catalyst to drive the reaction between isobutane and olefins (such as butene). However, during the alkylation reaction, some sulfuric acid loses its catalytic activity due to dilution, side reaction impurities, and impurity accumulation, forming alkylation waste acid containing organic matter, metallic impurities, and unreacted sulfuric acid. Direct discharge of this waste acid will lead to serious environmental problems such as soil acidification and water pollution, while also wasting sulfuric acid resources. Therefore, a waste acid regeneration system is needed to convert the waste acid into high-concentration sulfuric acid through incineration, pyrolysis, absorption, and purification processes, achieving resource recycling and environmental protection.

[0003] The construction of new, efficient, and environmentally friendly sulfuric acid regeneration units has become an urgent need in the industry. However, current molten salt heat exchanger units for alkylation waste acid regeneration face prominent problems during operation: the heat exchange tube materials are prone to severe scaling, agglomeration, and sulfuric acid corrosion, and this problem worsens over time, directly affecting the normal and continuous operation of the alkylation unit. In the current market environment where alkylate oil has high added value, unit downtime and maintenance caused by heat exchange tube corrosion not only increase operation and maintenance costs but also cause significant economic losses.

[0004] In existing technologies, corrosion testing of heat exchanger tube materials in molten salt heat exchangers mostly relies on on-site plate experiments or simplified simulation devices, which have the following drawbacks: First, on-site plate experiments are time-consuming and costly, and are affected by fluctuations in actual operating conditions, making it difficult to accurately analyze the corrosion mechanism; second, simplified simulation devices have loose structures and cannot stably simulate actual operating parameters such as high temperatures and specific sulfuric acid flow rates, resulting in low temperature and flow control accuracy and large deviations in test results; third, some simulation devices lack effective safety protection and waste liquid collection structures, posing risks of sulfuric acid leakage and equipment corrosion, and lacking safety and reliability.

[0005] Therefore, there is an urgent need for a compact, easy-to-operate, parameter-controllable, and safe and reliable experimental system to accurately simulate the corrosion environment of molten salt heat exchangers under actual working conditions, and to provide strong support for analyzing corrosion mechanisms and screening corrosion-resistant materials. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an experimental system for simulating an alkylation waste acid regeneration molten salt heat exchanger device. The experimental system, through the cooperation of a heating titration unit and a data measurement and control unit, precisely controls the sulfuric acid flow rate and specimen temperature, thereby simulating actual high-temperature sulfuric acid working conditions and testing the corrosion rate of metal specimens.

[0007] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions: An experimental system for simulating a molten salt heat exchanger device for regenerating alkylation waste acid, used to test the corrosion rate of specimens, includes a heating titration unit and a data measurement and control unit; The heating titration unit includes a reagent bottle, an insulated box, and a reagent delivery system; the data measurement and control unit includes a flow and temperature controller. One end of the reagent delivery system is connected to the outlet of the reagent bottle, and the other end is located above the test piece. A heating rod is fixed inside the insulated box. The flow temperature controller is electrically connected to the heating rod and controls the heating of the heating rod. During the experiment, the test piece is fitted onto the outer wall of the heating rod, and the reagent delivery system delivers the reagent from the reagent bottle to the test piece.

[0008] According to one aspect of the present invention, the reagent delivery system includes a rubber tube, a solenoid valve, and a flow meter; One end of the rubber tube is connected to the outlet of the reagent bottle, and the other end is located above the test piece. The reagent in the reagent bottle is transported to the test piece through the rubber tube. The solenoid valve and flow meter are mounted on the rubber tube, and the flow meter is used to record the valve flow of the solenoid valve. Both the solenoid valve and the flow meter are electrically connected to the flow temperature controller. The flow temperature controller is used to control the opening and closing degree of the solenoid valve, thereby controlling the flow rate of the reagent in the reagent delivery system and obtaining the flow value of the flow meter.

[0009] According to one aspect of the present invention, the rubber hose includes a rubber main pipe and a plurality of rubber branch pipes, the solenoid valve includes a main solenoid valve and a plurality of branch solenoid valves, and the flow meter includes a main flow meter and a plurality of branch flow meters. The main solenoid valve and the main flow meter are disposed on the rubber main pipe, and each rubber branch pipe is provided with a branch solenoid valve and a branch flow meter.

[0010] According to one aspect of the present invention, the flow temperature controller is provided with a solenoid valve adjustment knob, which includes a main solenoid valve adjustment knob and multiple branch solenoid valve adjustment knobs to control the opening degree of the main solenoid valve and each branch solenoid valve respectively, thereby adjusting the flow rate of the reagent on the rubber main pipe and the corresponding rubber branch pipe.

[0011] According to one aspect of the present invention, the flow temperature controller is provided with a specimen temperature display screen and a heating rod temperature display screen to display the temperatures of the specimen and the heating rod, respectively.

[0012] According to one aspect of the present invention, fixing holes are provided on two opposite side walls inside the heat preservation box, and the two ends of the heating rod are respectively inserted into the fixing holes to fix the heating rod inside the heat preservation box.

[0013] According to one aspect of this utility model, the heat preservation box is a high temperature and high pressure resistant structure, and the heat preservation box is equipped with an exhaust pipe and a safety valve located on the exhaust pipe. During the experiment, the exhaust pipe and the safety valve release the flue gas generated during the experiment and ensure that the pressure inside the heat preservation box is within a safe range.

[0014] According to one aspect of the present invention, the flow temperature controller is provided with an emergency stop button and a system control switch. The system control switch is used to start or stop the data measurement and control unit, and the emergency stop button is used to shut down the entire system in case of an abnormality during the experiment.

[0015] According to one aspect of the present invention, the flow temperature controller is provided with a heating rod temperature adjustment knob to adjust the temperature of the heating rod.

[0016] According to one aspect of the present invention, a liquid collection tray is provided at the bottom of the insulated box, which is used to collect residual reagents and corrosion products of the test specimen during the experiment.

[0017] The advantages of this invention are as follows: First, the data control unit precisely controls the reagent flow rate through flow meter readings and solenoid valve opening adjustments, while the temperature display screen shows the real-time temperature of the heating rod and the specimen, reducing manual adjustment errors and manpower costs, and significantly improving experimental accuracy and safety. Second, the system structure of this invention is compact, easy to operate, and has low operating costs, solving the problems of large footprint and difficulty in low-cost simulation of existing alkylation waste acid regeneration molten salt heat exchanger devices. It eliminates the need for complex large-scale equipment and is suitable for laboratory experiments. Third, the experimental system consists of a heating titration unit and a data control unit, which are relatively independent and easy to assemble and disassemble. The experimental process of simulating the alkylation waste acid regeneration molten salt heat exchanger device can be started at any time, facilitating the testing of multiple sets of specimens of various materials. Finally, the heating titration unit uses a high-temperature and high-pressure insulated box to ensure sealing, and is equipped with an exhaust pipe and a safety valve to maintain constant pressure inside the insulated box, ensuring equipment safety. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the experimental system of the molten salt heat exchanger device for simulating alkylation waste acid regeneration, as described in this utility model.

[0020] The components are as follows: 1. Liquid inlet; 2. Reagent bottle; 3. Main rubber hose; 3-1. First rubber branch hose; 3-2. Second rubber branch hose; 3-3. Third rubber branch hose; 3-4. Fourth rubber branch hose; 4. Main solenoid valve; 5. Main flow meter; 6. Exhaust pipe; 7. Safety valve; 8-1. First solenoid valve; 8-2. Second solenoid valve; 8-3. Third solenoid valve; 8-4. Fourth solenoid valve; 9-1. First flow meter; 9-2. Second flow meter; 9-3. Third flow meter; 9-4. Fourth flow meter; 10. Fixing sleeve; 11-1. First test piece; 11-2. Second test piece; 11-3. The first test piece; 11-4. The second test piece; 11-5. The third test piece; 11-6. The third test piece; 11-7. The third test piece; 11-8. The third test piece; 11-9. The third test piece; 11-1. The third test piece; 11-1. The third test piece; 11-2. The third test piece; 11-3. The fourth ... Three test specimens, 11-4, fourth test specimen, 12, heating rod, 13, collection tray, 14, insulation box, 15, first solenoid valve adjustment knob, 16, second solenoid valve adjustment knob, 17, third solenoid valve adjustment knob, 18, fourth solenoid valve adjustment knob, 19, main solenoid valve adjustment knob, 20, heating rod temperature adjustment knob, 21, emergency stop button, 22, system control switch, 23, first test specimen temperature display screen, 24, second test specimen temperature display screen, 25, third test specimen temperature display screen, 26, fourth test specimen temperature display screen, 27, heating rod temperature display screen, 28, flow and temperature controller. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Figure 1 A schematic diagram of the experimental system of this invention, representing a molten salt heat exchanger device for simulating alkylation waste acid regeneration, is shown. Figure 1 As shown, the test system is used to simulate the operating conditions of an alkylation waste acid regeneration molten salt heat exchanger to test the corrosion rate of metal specimens. It includes a heating titration unit and a data measurement and control unit, which are electrically connected.

[0023] The heating titration unit includes a reagent bottle 2, an insulated box 14, and a reagent delivery system. The data measurement and control unit includes a flow and temperature controller 28. A heating rod 12 is fixedly installed inside the insulated box 14. During the test, the annular metal specimen to be tested is fitted onto the outer wall of the heating rod 12. The flow and temperature controller 28 is electrically connected to the heating rod 12 and controls the heating of the heating rod 12. One end of the reagent delivery system is connected to the outlet of the reagent bottle 2 and delivers the reagent in the reagent bottle 2 to the specimen inside the insulated box 14.

[0024] The reagent bottle 2 is equipped with a filling port 1 for convenient addition of reagents. In this embodiment of the invention, the reagent is sulfuric acid, and the concentration of the sulfuric acid must be consistent with the actual working conditions; the capacity of the reagent bottle is 1000ml.

[0025] In this embodiment of the invention, sulfuric acid is used to simulate the corrosive environment under the actual operating conditions of an alkylation waste acid regeneration molten salt heat exchanger. The sulfuric acid is then delivered to the surface of the metal specimen through a subsequent reagent delivery system to test the sulfuric acid corrosion rate of the metal specimen.

[0026] Fixing holes 10 are provided on two opposite side walls inside the insulated box 14. The two ends of the heating rod 12 are inserted into the fixing holes 10, thereby fixing the heating rod 12 inside the insulated box 14. During the experiment, the annular metal specimen is directly placed on the outer wall of the heating rod 12, so that the inner wall of the specimen is in close contact with the outer wall of the heating rod; at the same time, the heating rod 12 is clamped and fixed by the two fixing holes 10 inside the insulated box 14, ensuring the stability of the heating rod position, and thus ensuring that the specimen and the heating rod are in close contact without loosening.

[0027] In this embodiment of the invention, the reagent delivery system includes a rubber tube, a solenoid valve, and a flow meter. The solenoid valve and flow meter are mounted on the rubber tube; the inlet of the flow meter is connected to the outlet of the solenoid valve, and the flow meter is used to record the reagent flow rate through the solenoid valve.

[0028] One end of the rubber tube is connected to the outlet of reagent bottle 2, while the other end is free and located above the specimen inside the insulated box 14. During the experiment, by controlling the solenoid valve, the reagent (sulfuric acid) in reagent bottle 2 can be transported through the rubber tube to the top of the specimen and dripped evenly onto the surface of the metal specimen, thereby simulating the corrosion environment of the metal specimen under the actual operating conditions of an alkylation waste acid regeneration molten salt heat exchanger.

[0029] To precisely control the reagent flow rate, both the solenoid valve and the flow meter are electrically connected to the flow temperature controller 28. The flow temperature controller 28 can control the opening and closing degree of the solenoid valve, thereby controlling the flow rate of the reagent in the reagent delivery system; at the same time, the flow temperature controller 28 can also obtain the flow rate value of the solenoid valve through the flow meter.

[0030] In this embodiment of the invention, the solenoid valve, flow meter, and flow-temperature controller 28 work together in a closed-loop logic of signal acquisition, data processing, and command execution to precisely control the flow rate of the reagent. Specifically, the flow meter, acting as the flow data acquisition terminal, collects real-time reagent (sulfuric acid) flow data and transmits these flow electrical signals to the flow-temperature controller 28 in real time. Upon receiving the signal, the flow-temperature controller 28 converts it into a flow value, compares it with the experimentally set flow target value, calculates the deviation using a built-in algorithm, and generates a valve opening adjustment command. Subsequently, the solenoid valve adjusts its opening according to the flow adjustment command to precisely control the reagent flow. Simultaneously, the corrected flow data is again collected by the flow meter and fed back to the flow-temperature controller 28, forming a complete flow control closed loop. This collectively achieves precise and stable control of the total sulfuric acid flow and the flow rate of a single channel, ensuring the accuracy of corrosion testing under simulated actual working conditions.

[0031] To improve testing efficiency, this invention enables corrosion testing of multiple specimens in a single experiment or batch testing of various specimens under different operating conditions based on reagent (sulfuric acid) flow rates. In this embodiment, the rubber tubing includes a main rubber pipe 3 and branch rubber pipes; the solenoid valves include a main solenoid valve 4 and branch solenoid valves; and the flow meters include a main flow meter 5 and branch flow meters. The main solenoid valve 4 and the main flow meter 5 are mounted on the main rubber pipe 3. There are multiple branch rubber pipes, branch solenoid valves, and branch flow meters, all in equal quantities. Each branch rubber pipe is equipped with one branch solenoid valve and one branch flow meter.

[0032] In this embodiment of the utility model, the branch solenoid valve includes a first solenoid valve 8-1, a second solenoid valve 8-2, a third solenoid valve 8-3, and a fourth solenoid valve 8-4; the branch flow meter includes a first flow meter 9-1, a second flow meter 9-2, a third flow meter 9-3, and a fourth flow meter 9-4; and the rubber branch pipe includes a first rubber branch pipe 3-1, a second rubber branch pipe 3-2, a third rubber branch pipe 3-3, and a fourth rubber branch pipe 3-4.

[0033] The first flow meter 9-1 and the first solenoid valve 8-1 are both installed on the first rubber branch pipe 3-1, and the outlet of the first solenoid valve 8-1 is connected to the inlet of the first flow meter 9-1; the second flow meter 9-2 and the second solenoid valve 8-2 are both installed on the second rubber branch pipe 3-2, and the outlet of the second solenoid valve 8-2 is connected to the inlet of the second flow meter 9-2; the third flow meter 9-3 and the third solenoid valve 8-3 are both installed on the third rubber branch pipe 3-3, and the outlet of the third solenoid valve 8-3 is connected to the inlet of the third flow meter 9-3; the fourth flow meter 9-4 and the fourth solenoid valve 8-4 are both installed on the fourth rubber branch pipe 3-4, and the outlet of the fourth solenoid valve 8-4 is connected to the inlet of the fourth flow meter 9-4; the outlet of the main solenoid valve 4 is connected to the inlet of the main flow meter 5.

[0034] Meanwhile, the test specimens include a first test specimen 11-1, a second test specimen 11-2, a third test specimen 11-3, and a fourth test specimen 11-4. The first test specimen 11-1, the second test specimen 11-2, the third test specimen 11-3, and the fourth test specimen 11-4 are all annular metal test specimens and are evenly spaced and fitted onto the outer wall of the heating rod 12, so that the inner wall of the test specimen is in close contact with the outer wall of the heating rod to facilitate heating of the test specimen.

[0035] The free ends of the first rubber branch tube 3-1, the second rubber branch tube 3-2, the third rubber branch tube 3-3, and the fourth rubber branch tube 3-4 are located directly above the first specimen 11-1, the second specimen 11-2, the third specimen 11-3, and the fourth specimen 11-4, respectively. The reagent (sulfuric acid) in the reagent bottle can be delivered to the corresponding specimen through each rubber branch tube. In this way, four types of metal specimens can be tested simultaneously within one experimental cycle, greatly improving experimental efficiency.

[0036] Among them, the first solenoid valve 8-1, the second solenoid valve 8-2, the third solenoid valve 8-3, the fourth solenoid valve 8-4 and the main solenoid valve 4 are all electrically connected to the flow and temperature controller 28.

[0037] To achieve precise flow regulation of each solenoid valve, the flow and temperature controller 28 is equipped with solenoid valve adjustment knobs, including a main solenoid valve adjustment knob 19 and branch solenoid valve adjustment knobs, with multiple branch solenoid valve adjustment knobs. In this embodiment, the branch solenoid valve adjustment knobs include a first solenoid valve adjustment knob 15, a second solenoid valve adjustment knob 16, a third solenoid valve adjustment knob 17, and a fourth solenoid valve adjustment knob 18, which respectively control the opening of the first solenoid valve 8-1, the second solenoid valve 8-2, the third solenoid valve 8-3, and the fourth solenoid valve 8-4 to regulate the flow rate of the reagent on the corresponding rubber branch tube. Specifically, the main solenoid valve 4 adjusts its valve core opening according to the total flow regulation command to stabilize the total flow, while the first solenoid valve 8-1, the second solenoid valve 8-2, the third solenoid valve 8-3, and the fourth solenoid valve 8-4 independently adjust their openings according to their respective branch regulation commands to precisely control the flow of a single branch.

[0038] To facilitate the adjustment of the heating rod temperature, the flow temperature controller 28 is also equipped with a heating rod temperature adjustment knob 20. The temperature of the heating rod 12 can be adjusted through this knob, thereby adjusting the experimental temperature of the metal specimen.

[0039] To display the real-time temperatures of the specimen and heating rod 12, the flow temperature controller 28 is equipped with a specimen temperature display screen and a heating rod temperature display screen 24. The heating rod temperature display screen 24 can display the temperature of the heating rod 12, and the specimen temperature display screen can display the specimen's temperature during the experiment. In this embodiment of the invention, there are multiple specimen temperature display screens, including a first specimen temperature display screen 23, a second specimen temperature display screen 24, a third specimen temperature display screen 25, a fourth specimen temperature display screen 26, and a heating rod temperature display screen 27, to respectively display the temperatures of the first specimen 11-1, the second specimen 11-2, the third specimen 11-3, and the fourth specimen 11-4.

[0040] In this embodiment of the invention, the flow and temperature controller 28 is further provided with an emergency stop button 21 and a system control switch 22. The system control switch 22 is used to start or stop the data measurement and control unit; the emergency stop button 21 is used to shut down the entire system in case of an experimental anomaly.

[0041] It is understood that, in order to simulate the actual working conditions of the molten salt heat exchanger for the regeneration of alkylation waste acid, the insulation box 14 of this invention has a high-temperature and high-pressure resistant structure, and the insulation box 14 is equipped with an exhaust pipe 6 and a safety valve 7 located on the exhaust pipe 6. The exhaust pipe 6 is located at an appropriate position above the insulation box 14. During the test, the exhaust pipe 6 and the safety valve 7 work together not only to release the flue gas generated during the experiment, but also to maintain the pressure inside the insulation box 14 at a constant and safe value, preventing abnormal pressure from damaging the insulation box 14.

[0042] The experimental system for simulating the molten salt heat exchanger for regenerating alkylation waste acid is also equipped with a collection tray 13, which is located at the bottom of the insulated box 14. During the experiment, the collection tray 13 can be used to collect excess reagents that do not have time to evaporate and corrosion products of the test specimens, preventing the reagents from directly contacting the inner wall of the insulated box 14 and causing corrosion of the box.

[0043] The advantages of this invention are as follows: First, the data control unit precisely controls the reagent flow rate through flow meter readings and solenoid valve opening adjustments, while the temperature display screen shows the real-time temperature of the heating rod and the specimen, reducing manual adjustment errors and manpower costs, and significantly improving experimental accuracy and safety. Second, the system structure of this invention is compact, easy to operate, and has low operating costs, solving the problems of large footprint and difficulty in low-cost simulation of existing alkylation waste acid regeneration molten salt heat exchanger devices. It eliminates the need for complex large-scale equipment and is suitable for laboratory experiments. Third, the experimental system consists of a heating titration unit and a data control unit, which are relatively independent and easy to assemble and disassemble. The experimental process of simulating the alkylation waste acid regeneration molten salt heat exchanger device can be started at any time, facilitating the testing of multiple sets of specimens of various materials. Finally, the heating titration unit uses a high-temperature and high-pressure insulated box to ensure sealing, and is equipped with an exhaust pipe and a safety valve to maintain constant pressure inside the insulated box, ensuring equipment safety.

[0044] In summary, the experimental system of this invention can accurately simulate the high-temperature and high-pressure corrosion environment under actual working conditions, evaluate the corrosion of different metal specimens, and screen out the metal specimens with the lowest degree of corrosion and the slowest corrosion rate. It provides a basis for the selection of heat exchange tube materials for actual alkylation waste acid regeneration molten salt heat exchangers and has important industrial application value.

[0045] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An experimental system for simulating a molten salt heat exchanger device for regenerating alkylation waste acid, used to test the corrosion rate of specimens, characterized in that, Includes a heating titration unit and a data measurement and control unit; The heating titration unit includes a reagent bottle (2), an insulated box (14), and a reagent delivery system. The data measurement and control unit includes a flow and temperature controller (28). One end of the reagent delivery system is connected to the outlet of the reagent bottle (2), and the other end is located above the test piece. A heating rod (12) is fixed inside the insulated box (14). The flow temperature controller (28) is electrically connected to the heating rod (12) and controls the heating of the heating rod (12); During the experiment, the test piece is fitted onto the outer wall of the heating rod (12), and the reagent delivery system delivers the reagent in the reagent bottle (2) to the test piece.

2. The experimental system of the molten salt heat exchanger device for simulating alkylation waste acid regeneration according to claim 1, characterized in that, The reagent delivery system includes rubber tubing, a solenoid valve, and a flow meter; One end of the rubber tube is connected to the outlet of the reagent bottle (2), and the other end is located above the test piece. The reagent in the reagent bottle (2) is transported to the test piece through the rubber tube. The solenoid valve and flow meter are mounted on the rubber tube, and the flow meter is used to record the valve flow of the solenoid valve. Both the solenoid valve and the flow meter are electrically connected to the flow temperature controller (28). The flow temperature controller (28) is used to control the opening and closing degree of the solenoid valve, thereby controlling the flow rate of the reagent in the reagent delivery system and obtaining the flow value of the flow meter.

3. The experimental system of the molten salt heat exchanger device for simulating alkylation waste acid regeneration according to claim 2, characterized in that, The rubber pipe includes a rubber main pipe (3) and multiple rubber branch pipes. The solenoid valve includes a main solenoid valve (4) and multiple branch solenoid valves. The flow meter includes a main flow meter (5) and multiple branch flow meters. The main solenoid valve (4) and the main flow meter (5) are installed on the rubber main pipe (3), and each rubber branch pipe is equipped with a branch solenoid valve and a branch flow meter.

4. The experimental system of the molten salt heat exchanger device for simulating alkylation waste acid regeneration according to claim 3, characterized in that, The flow and temperature controller (28) is equipped with a solenoid valve adjustment knob, which includes a main solenoid valve adjustment knob (19) and multiple branch solenoid valve adjustment knobs to control the opening of the main solenoid valve (4) and each branch solenoid valve respectively, thereby adjusting the flow rate of the reagent on the rubber main pipe (3) and the corresponding rubber branch pipe.

5. The experimental system of the molten salt heat exchanger device for simulating alkylation waste acid regeneration according to claim 1, characterized in that, The flow temperature controller (28) is equipped with a specimen temperature display screen and a heating rod temperature display screen (27) to display the temperature of the specimen and the heating rod (12) respectively.

6. The experimental system of the molten salt heat exchanger device for simulating alkylation waste acid regeneration according to claim 1, characterized in that, Fixing holes (10) are provided on the two opposite side walls inside the heat preservation box (14). The two ends of the heating rod (12) are respectively inserted into the fixing holes (10) to fix the heating rod (12) inside the heat preservation box (14).

7. The experimental system of the molten salt heat exchanger device for simulating alkylation waste acid regeneration according to claim 1, characterized in that, The heat preservation box (14) is a high temperature and high pressure resistant structure and is equipped with an exhaust pipe (6) and a safety valve (7) located on the exhaust pipe (6). During the experiment, the exhaust pipe (6) and the safety valve (7) release the flue gas generated during the experiment and ensure that the pressure inside the heat preservation box (14) is within a safe range.

8. The experimental system of the molten salt heat exchanger device for simulating alkylation waste acid regeneration according to claim 1, characterized in that, The flow and temperature controller (28) is equipped with an emergency stop button (21) and a system control switch (22). The system control switch (22) is used to start or stop the data measurement and control unit, and the emergency stop button (21) is used to shut down the entire system in case of an abnormality in the experiment.

9. The experimental system of the molten salt heat exchanger device for simulating alkylation waste acid regeneration according to claim 1, characterized in that, The flow temperature controller (28) is equipped with a heating rod temperature adjustment knob (20) to adjust the temperature of the heating rod (12).

10. The experimental system for a simulated alkylation waste acid regeneration molten salt heat exchanger device according to any one of claims 1 to 9, characterized in that, The bottom of the insulated box (14) is provided with a liquid collection tray (13), which is used to collect residual reagents and corrosion products of the test specimens during the experiment.

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