On-line monitoring device and system for corrosion rate of circulating water system of SCAL type indirect cooling unit

Abstract

The utility model discloses a SCAL type intercooler unit circulating water system corrosion rate online monitoring device and system, comprising an electrochemical test container and an electrochemical test device; a first working electrode and a second working electrode are arranged on one side of the electrochemical test container; a carbon steel test electrode and a pure aluminum test electrode are arranged on the other side; the first working electrode and the carbon steel test electrode are arranged oppositely, and a first reference electrode is arranged between the two; the second working electrode and the pure aluminum test electrode are arranged oppositely, and a second reference electrode is arranged between the two; the electrochemical test container has a container water outlet and a test container water inlet interface; the electrochemical test device has a carbon steel electrochemical test cable and a pure aluminum electrochemical test cable. The device improves the accuracy of the test result.

Description

Technical Field

[0001] The utility model belongs to the technical field of material corrosion rate measurement in industrial field environment, and specifically relates to an online monitoring device and system for corrosion rate of a circulating water system of a SCAL type intercooler. Background Art

[0002] The SCAL intercooling unit is a new type of unit developed on the basis of the Heller intercooling system and the Harmon intercooling system. The circulating cooling water system of the unit adopts a vertically arranged pure aluminum radiator and a surface condenser made of stainless steel. It has the characteristics of a small footprint of the intercooling tower and can adapt to the large-scale unit. It has become the main model of newly built thermal power units. The unit uses desalted water as the unit supplementary water. The original design intention is to use the pure water environment to reduce the corrosion rate of materials in the system. However, during the operation of most units, the conductivity of the circulating water cannot be maintained in the desalted water state, and the conductivity is generally 30μS / cm-50μS / cm. The circulating water pipes of the circulating water system of the unit are made of carbon steel. In this water quality environment, carbon steel will undergo uniform corrosion. The corrosion products formed after the corrosion of carbon steel will partially fall off into the intercooling circulating water, resulting in abnormal water quality such as increased turbidity and increased iron content in the circulating water. The radiator of the SCAL intercooling unit includes a special shape of the bottom water collecting tank, which causes the water flow impact on some aluminum tubes more seriously. Especially when the content of iron corrosion products in the water is high, the impact of the solid-liquid two-phase flow on the aluminum tubes is more intense, exacerbating the erosion corrosion phenomenon of the aluminum tubes. In addition, the carbon steel corrosion products adsorbed on the surface of the aluminum tube will also affect the heat exchange efficiency of the aluminum tube, resulting in insufficient circulating water cooling and increased coal consumption of the unit in summer. The wall thickness of the pure aluminum radiator in this system is only 1mm, and the corrosion margin is small. Once corrosion leakage occurs, it will cause system leakage and other problems. In summary, the corrosion control of carbon steel and pure aluminum in the SCAL intercooling system is crucial to the safe and stable operation of the unit, and the online real-time monitoring of the corrosion rate of carbon steel and pure aluminum can provide guidance for operators to add corrosion inhibition or water quality control.

[0003] The corrosion rate online monitoring devices currently available on the market mainly monitor the corrosion rate of carbon steel materials. The test principles mainly include the two-electrode linear polarization resistance method, the resistance method and the inductance method. Among them, there are no products with pure aluminum test probes for the resistance method and the inductance method. The two-electrode linear polarization resistance method has three main disadvantages in monitoring the corrosion rate of pure aluminum or iron: (1) The problem with the two-electrode method is that the conductivity of the circulating water in the intercooling system is low, and the resistance of the test solution is large. (2) The test results are easily affected by the water flow. (3) There is no filtering equipment in the intercooling system, and the probe is easily attached with dirt.

[0004] In summary, there is currently no online corrosion rate monitoring device that can be applied to SCAL type intercooler systems. Utility Model Content

[0005] In order to solve the above-mentioned problems existing in the prior art, the purpose of the utility model is to provide an online monitoring device for the corrosion rate of the circulating water system of a SCAL type intercooler, which is used for online measurement of the corrosion rate of carbon steel and pure aluminum in the circulating cooling water system of a SCAL type intercooler. The device adopts a three-electrode method for electrochemical testing, and can reduce the solution resistance through a special circulation pool structure; it has filtering and backwashing functions, which can reduce the dirt on the probe surface, and can meet the online corrosion rate monitoring needs of carbon steel and pure aluminum in the SCAL system.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] In a first aspect, the utility model provides a SCAL type intercooler unit circulating water system corrosion rate online monitoring device, comprising an electrochemical test container and an electrochemical test device;

[0008] A first working electrode and a second working electrode are arranged on one side of the electrochemical test container; a carbon steel test electrode and a pure aluminum test electrode are arranged on the other side; the first working electrode and the carbon steel test electrode are arranged opposite to each other, and a first reference electrode is arranged between the two; the second working electrode and the pure aluminum test electrode are arranged opposite to each other, and a second reference electrode is arranged between the two; the electrochemical test container has a container water outlet and a test container water inlet interface;

[0009] The electrochemical testing device has a carbon steel electrochemical testing cable and a pure aluminum electrochemical testing cable. The first working electrode, the carbon steel testing electrode, and the first reference electrode are all connected to the carbon steel electrochemical testing cable; the second working electrode, the pure aluminum testing electrode, and the second reference electrode are all connected to the pure aluminum electrochemical testing cable.

[0010] Optionally, the electrochemical test container is a transparent structure as a whole.

[0011] Optionally, the first reference electrode and the second reference electrode are both temperature-resistant and voltage-resistant silver-silver chloride reference electrodes.

[0012] Optionally, the first working electrode is made of pure platinum, and a first working electrode test connector is welded on the back; the second working electrode is made of pure platinum, and a second working electrode test connector is welded on the back.

[0013] Optionally, the upper surface of the electrochemical test container has a container water outlet, a first reference electrode test joint and a second reference electrode test joint; the lower surface of the electrochemical test container has a sewage discharge end cover and a sewage discharge end cover disassembly port.

[0014] Optionally, the carbon steel test electrode includes a carbon steel electrode sheet wrapped with a first polytetrafluoroethylene layer, a first test electrode copper wire is welded on the back of the carbon steel electrode sheet, and a first test electrode external thread is provided on the outer surface of the first polytetrafluoroethylene layer; and a first polytetrafluoroethylene rod is protruded on one side of the first test electrode wire.

[0015] Optionally, the pure aluminum test electrode includes a pure aluminum electrode sheet wrapped with a second polytetrafluoroethylene layer; a second test electrode copper wire is welded on the back of the pure aluminum electrode sheet, and a second test electrode external thread is cut on the outer surface of the second polytetrafluoroethylene layer; and a second polytetrafluoroethylene rod is protruded on one side of the second test electrode copper wire.

[0016] Optionally, a cartridge filter is installed upstream of the water inlet interface of the test container, and a detachable filter cartridge is provided inside the cartridge filter.

[0017] Optionally, the electrochemical testing device has a wireless network card for sending the measurement results to a user.

[0018] In a second aspect, the utility model provides a SCAL type intercooler circulating water system corrosion rate online monitoring system, comprising a monitoring pipeline and the SCAL type intercooler circulating water system corrosion rate online monitoring device;

[0019] The SCAL type intercooling unit circulating water system corrosion rate online monitoring device is installed in the intercooling tower of the SCAL type intercooling system, and one end of the monitoring pipeline is connected from the hot water main pipe emptying door of one of the intercooling towers to the cold water main pipe emptying door;

[0020] The monitoring pipeline is provided with a pipeline water inlet main valve, a flow regulating valve, and a pipeline return water main valve in sequence; a test branch is provided between the pipeline water inlet main valve and the flow regulating valve, and the test branch is divided into two paths after passing through the electrochemical test container, one path flows through between the return flow regulating valve and the pipeline return water main valve; the other path passes through the corrosion hanging device and the flow meter in sequence and then returns to the emptying door of another cold water main pipe; the electrochemical test device transmits the measurement results to the user through the wireless network card.

[0021] Compared with the prior art, the utility model has the following advantages:

[0022] The test container of the utility model device adopts a pressure-resistant structure as a whole, is sealed with a high-temperature resistant sealant, and uses a platinum wire as a reference electrode. It can perform electrochemical measurements in a high-temperature and high-pressure environment of circulating water in a heat network. The utility model adopts a flat electrochemical test container to minimize the distance between the test electrode and the working electrode and reduce the solution resistance. The flow rate through the test container is adjusted by bypass to reduce the interference of water flow disturbance on the test process. The device uses a three-electrode method for electrochemical testing. Compared with the traditional two-electrode method, the electrochemical test results are more stable.

[0023] Furthermore, a filter device is installed in front of the electrochemical test container to reduce the pollution of suspended matter on the electrode surface. The electrochemical test container is designed with a backwash function to keep the container clean. A transparent observation port is designed on the side to observe the state of the electrode surface.

[0024] Furthermore, the electrochemical test device is connected in series with a corrosion hanging device, and the corrosion hanging device can be used to regularly check and inspect the electrochemical test results, thereby improving the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are for explanation purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. In the drawings:

[0026] Figure 1 This is a schematic diagram of the electrochemical testing device of the utility model;

[0027] Figure 2 A schematic diagram of the rear surface of the electrochemical test container;

[0028] Figure 3 is a schematic diagram of the structure of the first working electrode;

[0029] Figure 4 is a schematic diagram of the structure of the second working electrode;

[0030] Figure 5 This is a schematic diagram of the pure aluminum test electrode structure;

[0031] Figure 6 This is a schematic diagram of the carbon steel test electrode structure;

[0032] Figure 7 It is a schematic diagram of the connection pipeline between the electrochemical measuring device of the utility model and the circulating water cooling water system of the SCAL type intercooler;

[0033] Among them, 1. electrochemical test container; 2. first working electrode; 3. second working electrode; 4. test end copper wire; 5. electrochemical test device; 6. sewage end cover; 7. container water outlet; 8. first working electrode test connector; 9. filter element; 10. first reference electrode; 11. carbon steel test electrode; 12. first interface; 13. carbon steel electrode sheet; 14. sewage end cover disassembly port; 15. filter element filter; 16. first polytetrafluoroethylene layer; 17. first test electrode copper wire; 18. telecommunication equipment; 19. carbon steel electrochemical test cable; 20. first test electrode external thread; 21. first polytetrafluoroethylene rod; 22. right surface; 23. pipeline water inlet main valve; 24. pipeline return water main valve; 25. hot water main pipe drain Empty door; 26, cold water main pipe emptying door; 27, test branch water inlet valve; 28, test branch water return valve; 29, flow meter; 30, backwash valve; 31, hanging plate pre-valve; 32, corrosion hanging plate; 33, pure aluminum electrochemical test cable; 34, second polytetrafluoroethylene rod; 35, second test electrode copper wire; 36, second polytetrafluoroethylene layer; 37, pure aluminum electrode sheet; 38, second test electrode external thread; 39, second working electrode test connector; 40, second reference electrode test connector; 41, first reference electrode test connector; 42, pure aluminum test electrode; 43, second interface; 44, test container water inlet interface; 45, cold water main pipe; 46, flow control valve; 47, hot water main pipe; 48, second reference electrode. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0035] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0037] like Figure 1 As shown, the first purpose of the utility model is to provide a SCAL type intercooler unit circulating water system corrosion rate online monitoring device, characterized in that it includes an electrochemical test container 1 and an electrochemical test device 5;

[0038] A first working electrode 2 and a second working electrode 3 are arranged on one side of the electrochemical test container 1; a carbon steel test electrode 11 and a pure aluminum test electrode 42 are arranged on the other side; the first working electrode 2 and the carbon steel test electrode 11 are arranged opposite to each other, and a first reference electrode 10 is arranged between the two; the second working electrode 3 and the pure aluminum test electrode 42 are arranged opposite to each other, and a second reference electrode 48 is arranged between the two; the electrochemical test container 1 has a container water outlet 7 and a test container water inlet interface 44;

[0039] The electrochemical testing device 5 has a carbon steel electrochemical testing cable 19 and a pure aluminum electrochemical testing cable 33. The first working electrode 2, the carbon steel test electrode 11, and the first reference electrode 10 are all connected to the carbon steel electrochemical testing cable 19; the second working electrode 3, the pure aluminum test electrode 42 and the second reference electrode 48 are all connected to the pure aluminum electrochemical testing cable 33.

[0040] The utility model of the SCAL type intercooler unit circulating water system corrosion rate online monitoring device can monitor the corrosion rate of the circulating water system in real time online through the combination of an electrochemical test container and an electrochemical test device. By arranging different working electrodes and reference electrodes, accurate electrochemical data can be obtained, and then the corrosion rate can be analyzed and calculated, which is crucial for preventing and promptly dealing with corrosion problems. Carbon steel test electrodes and pure aluminum test electrodes are set in the device, which means that it can simultaneously monitor the corrosion of different materials in the circulating water system. This multi-material adaptability makes the device have a wider application prospect in complex industrial environments.

[0041] The connection mode of the electrochemical test cable makes data collection and transmission more convenient, and remote monitoring can be achieved through the electrochemical test device 5. At the same time, the electrochemical test container has a water outlet and a water inlet interface, which is convenient for sampling and replacing circulating water, making the device easy to maintain and maintain during long-term use.

[0042] Through the reasonable arrangement of electrodes and the use of reference electrodes, the device can monitor the corrosion rate without interfering with the normal operation of the circulation system. This not only ensures the safe operation of the system, but also enables accurate acquisition of corrosion data. Through online monitoring, corrosion problems can be discovered and dealt with in a timely manner, avoiding equipment damage and increased maintenance costs caused by corrosion. In addition, the design of the device takes into account the stability and durability of long-term use, further improving cost-effectiveness.

[0043] In summary, this SCAL type intercooler circulating water system corrosion rate online monitoring device has the advantages of real-time monitoring, high-precision measurement, multi-material adaptability, easy operation, safety and reliability, and high cost-effectiveness, providing an effective solution for corrosion monitoring and protection of industrial circulating water systems.

[0044] like Figure 7 As shown, the second purpose of the utility model is to provide a SCAL type intercooler circulating water system corrosion rate online monitoring system, including a monitoring pipeline and the SCAL type intercooler circulating water system corrosion rate online monitoring device;

[0045] The SCAL type intercooler unit circulating water system corrosion rate online monitoring device is installed in the intercooler tower of the SCAL type intercooler system and is connected in parallel with the monitoring pipeline through a test branch.

[0046] The system integrates monitoring pipelines and online corrosion rate monitoring devices, making the entire system more compact and efficient. This highly integrated design not only reduces the footprint, but also simplifies the installation and maintenance process and improves work efficiency. This dynamic monitoring method can detect corrosion problems in a timely manner, avoid the lag that may exist in traditional regular testing, and improve early warning and response speed. The system realizes flexible monitoring of the circulating water system through the parallel design of monitoring pipelines and test branches. In addition, the system can be expanded as needed to add more monitoring points or monitoring equipment to adapt to circulating water systems of different sizes and complexities.

[0047] Through real-time online monitoring, the system can detect potential corrosion problems in advance, so as to carry out preventive maintenance and management in time. This can not only extend the service life of the equipment, but also reduce the failure rate and maintenance costs caused by corrosion.

[0048] The utility model is further described in conjunction with the accompanying drawings and specific embodiments.

[0049] Example 1

[0050] The SCAL type intercooler circulating water system corrosion rate online monitoring device of this embodiment comprises an electrochemical test container 1, such as Figure 1 shown.

[0051] Optionally, the electrochemical test container 1 is made of organic glass as a whole. The electrochemical test container 1 is a vertically arranged rectangular parallelepiped structure, which is hollow inside and can flow water. For the convenience of description, the six surfaces of the electrochemical test container 1 are respectively described as the front surface, the rear surface, the upper surface, the lower surface, the left surface and the right surface. The organic glass of the left surface and the right surface 22 has good light transmittance, and the electrode surface state can be observed during the test, such as Figure 2 Of course, other transparent materials that meet the test requirements can also be used as the material of the electrochemical test container 1.

[0052] The front surface of the electrochemical test container 1 is provided with a first working electrode 2 and a second working electrode 3. Figure 3 and Figure 4 As shown, the first working electrode 2 is made of pure platinum, and a first working electrode test connector 8 is welded on the back, and a copper wire can be used for the test connector. The second working electrode 3 is made of pure platinum, and a second working electrode test connector 39 is welded on the back, and a copper wire can be used for the test connector.

[0053] The first working electrode 2 is arranged opposite to the carbon steel test electrode 11, and serves as the working electrode in the electrochemical test process of the carbon steel test, and a first reference electrode 10 is arranged between the two. The second working electrode 3 is arranged opposite to the pure aluminum test electrode 42, and serves as the working electrode for the pure aluminum test, and a second reference electrode 48 is arranged between the two. The reference electrodes are all silver-silver chloride reference electrodes that are temperature-resistant and pressure-resistant.

[0054] The upper surface of the electrochemical test container 1 is provided with a container water outlet 7, a first reference electrode test joint 41 and a second reference electrode test joint 40. The lower surface of the electrochemical test container 1 is provided with a sewage discharge end cap 6 and a sewage discharge end cap disassembly port 14.

[0055] A carbon steel test electrode 11 , a pure aluminum test electrode 42 and a test container water inlet interface 44 are arranged on the rear surface of the electrochemical test container 1 .

[0056] like Figure 5 and Figure 6 As shown, the carbon steel test electrode 11 includes a carbon steel electrode sheet 13, and a first polytetrafluoroethylene layer 16 tightly wrapped thereon. A first test electrode copper wire 17 is welded on the back of the carbon steel electrode, and the first polytetrafluoroethylene layer 16 is cylindrical, and a first test electrode external thread 20 is cut on the outer surface, which is used to be tightly connected to the electrochemical test container 1, and a circular first interface 12 is provided on the rear surface of the electrochemical test container 1.

[0057] During use, the cylindrical carbon steel test electrode 11 is rotatably mounted on the rear surface of the electrochemical test container 1. There are four protruding first polytetrafluoroethylene rods 21 on one side of the wire of the carbon steel test electrode 11, and the four protruding first polytetrafluoroethylene rods 21 are used as force application points during the installation process of the carbon steel test electrode 11.

[0058] The pure aluminum test electrode 42 includes a pure aluminum electrode sheet 37, and a second polytetrafluoroethylene layer 36 tightly wrapped outside. A second test electrode copper wire 35 is welded on the back of the pure aluminum electrode. The second polytetrafluoroethylene layer 36 is cylindrical, and a second test electrode external thread 38 is cut on the outer surface for tight connection with the electrochemical test container 1. The rear surface of the electrochemical test container 1 has a circular second interface 43. During use, the cylindrical pure aluminum test electrode 42 is rotated and installed on the rear surface of the electrochemical test container 1. There are four raised second polytetrafluoroethylene rods 34 on one side of the carbon steel test electrode 11 wire, and the four raised second polytetrafluoroethylene rods 34 are used as force points during the installation process of the pure aluminum test electrode.

[0059] A cartridge filter 15 is installed upstream of the test container water inlet interface 44. The filter element 9 inside the cartridge filter 15 can be replaced regularly to filter and remove suspended matter and sludge in the intercooling circulating water to reduce interference with the test process.

[0060] This embodiment uses a flat electrochemical test container 1 to minimize the distance between the test electrode and the working electrode and reduce the solution resistance. The flow rate through the test container is adjusted by bypassing to reduce the interference of water flow disturbance on the test process. The three-electrode method is used for electrochemical testing, and the electrochemical test results are more stable compared to the traditional two-electrode method. A filter device is installed in front of the electrochemical test container 1 to reduce the contamination of the electrode surface by suspended matter. The electrochemical test container 1 is designed with a backwash function to keep the container clean. A transparent observation port is designed on the side to observe the surface state of the electrode. The electrochemical test device 5 is connected in series with a corrosion hanging plate device, and the corrosion hanging plate device can be used to regularly check and inspect the electrochemical test results, thereby improving the accuracy of the test results.

[0061] Example 2

[0062] like Figure 7 As shown, the electrochemical testing device 5 is installed in the intercooling tower of the SCAL type intercooling system, and a three-way joint is installed at the position of the emptying door 25 of the hot water main pipe of the intercooling tower in one of the sectors. A monitoring pipeline flows through the pipeline water inlet main valve 23, the flow regulating valve 46, the pipeline return water main valve 24 in sequence and then returns to the emptying door 26 of another cold water main pipe.

[0063] A test branch is provided between the pipeline water inlet main valve 23 and the flow regulating valve 46. The water flows through the test branch water inlet valve 27, flows through the electrochemical test container 1, flows out from the container water outlet 7, and then is divided into two paths. One path flows through the backwash valve 30, and the water returns between the flow regulating valve 46 and the pipeline return water main valve 24.

[0064] The other path flows through the pre-valve 31 of the hanging device, the corrosion hanging device 32, the flow meter 29 and the test branch return valve 28, and then returns to the bypass, flows through the pipeline return main valve 24, and then returns to another cold water main pipe emptying door 26.

[0065] The electrochemical testing device 5 has two test cables, the carbon steel electrochemical testing cable 19 is connected to the first working electrode test connector 8, the first reference electrode test connector 41 and the first test electrode copper wire 17, and the linear polarization resistance of the carbon steel electrode in the intercooling circulating water is tested by the three-electrode method.

[0066] The pure aluminum electrochemical test cable 33 is connected to the second working electrode test connector 39, the second reference electrode test connector 40 and the second test electrode copper wire 35, and the linear polarization resistance of the pure aluminum electrode in the intercooling circulating water is tested by the three-electrode method. The electrochemical test device 5 transmits the measurement results to the user through the wireless network card.

[0067] Unless otherwise specified, the device elements involved in the above embodiments are all conventional device elements, and the structural settings, working modes or control modes involved are all conventional settings, working modes or control modes in the art unless otherwise specified.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A SCAL type intercooler unit circulating water system corrosion rate online monitoring device, characterized in that: It comprises an electrochemical test container (1) and an electrochemical test device (5); A first working electrode (2) and a second working electrode (3) are arranged on one side of an electrochemical test container (1); a carbon steel test electrode (11) and a pure aluminum test electrode (42) are arranged on the other side; the first working electrode (2) and the carbon steel test electrode (11) are arranged opposite to each other, and a first reference electrode (10) is arranged between the two; the second working electrode (3) and the pure aluminum test electrode (42) are arranged opposite to each other, and a second reference electrode (48) is arranged between the two; the electrochemical test container (1) has a container water outlet (7) and a test container water inlet interface (44); The electrochemical testing device (5) comprises a carbon steel electrochemical testing cable (19) and a pure aluminum electrochemical testing cable (33); the first working electrode (2), the carbon steel testing electrode (11), and the first reference electrode (10) are all connected to the carbon steel electrochemical testing cable (19); and the second working electrode (3), the pure aluminum testing electrode (42), and the second reference electrode (48) are all connected to the pure aluminum electrochemical testing cable (33).

2. The SCAL type intercooler unit circulating water system corrosion rate online monitoring device according to claim 1 is characterized in that: The electrochemical test container (1) is a transparent structure as a whole.

3. The SCAL type intercooler unit circulating water system corrosion rate online monitoring device according to claim 1 is characterized in that: The first reference electrode (10) and the second reference electrode (48) are both temperature-resistant and voltage-resistant silver-silver chloride reference electrodes.

4. The SCAL type intercooler unit circulating water system corrosion rate online monitoring device according to claim 1 is characterized in that: The first working electrode (2) is made of pure platinum, and a first working electrode test connector (8) is welded on the back; the second working electrode (3) is made of pure platinum, and a second working electrode test connector (39) is welded on the back.

5. The SCAL type intercooler unit circulating water system corrosion rate online monitoring device according to claim 1 is characterized in that: The upper surface of the electrochemical test container (1) is provided with a container water outlet (7), a first reference electrode test joint (41) and a second reference electrode test joint (40); the lower surface of the electrochemical test container (1) is provided with a sewage discharge end cover (6) and a sewage discharge end cover disassembly port (14).

6. The SCAL type intercooler unit circulating water system corrosion rate online monitoring device according to claim 1 is characterized in that: The carbon steel test electrode (11) comprises a carbon steel electrode sheet (13) which is wrapped with a first polytetrafluoroethylene layer (16); a first test electrode copper wire (17) is welded to the back of the carbon steel electrode sheet (13); a first test electrode external thread (20) is provided on the outer surface of the first polytetrafluoroethylene layer (16); and a first polytetrafluoroethylene rod (21) is protruded on one side of the first test electrode copper wire (17).

7. The SCAL type intercooler unit circulating water system corrosion rate online monitoring device according to claim 1 is characterized in that: The pure aluminum test electrode (42) comprises a pure aluminum electrode sheet (37) which is wrapped with a second polytetrafluoroethylene layer (36); a second test electrode copper wire (35) is welded on the back of the pure aluminum electrode sheet (37), and a second test electrode external thread (38) is cut on the outer surface of the second polytetrafluoroethylene layer (36); and a protruding second polytetrafluoroethylene rod (34) is provided on one side of the second test electrode copper wire (35).

8. The SCAL type intercooler unit circulating water system corrosion rate online monitoring device according to claim 1 is characterized in that: A cartridge filter (15) is installed upstream of the test container water inlet interface (44), and a detachable filter cartridge (9) is provided inside the cartridge filter (15).

9. The SCAL type intercooler unit circulating water system corrosion rate online monitoring device according to claim 1 is characterized in that: The electrochemical testing device (5) has a wireless network card for sending the measurement results to a user.

10. A SCAL type intercooler circulating water system corrosion rate online monitoring system, characterized in that: It comprises a monitoring pipeline and a SCAL type intercooler unit circulating water system corrosion rate online monitoring device according to any one of claims 1 to 9; The SCAL type intercooler unit circulating water system corrosion rate online monitoring device is installed in the intercooler tower of the SCAL type intercooler system, and one end of the monitoring pipeline is connected from the hot water main pipe emptying door (25) of one of the intercooler towers to the cold water main pipe emptying door (26); The monitoring pipeline is provided with a pipeline water inlet main valve (23), a flow regulating valve (46), and a pipeline water return main valve (24) in sequence; a test branch is provided between the pipeline water inlet main valve (23) and the flow regulating valve (46); the test branch is divided into two paths after passing through the electrochemical test container (1), one path flows through the return flow regulating valve (46) and the pipeline water return main valve (24); the other path passes through the corrosion hanging device (32) and the flow meter (29) in sequence and then returns to another cold water main pipe emptying door (26); the electrochemical test device (5) transmits the measurement result to the user through the wireless network card.

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