Aluminum radiator erosion corrosion simulation test device for indirect cooling system and its use method

Abstract

The present invention discloses an erosion corrosion simulation test device for an aluminum radiator of an indirect cooling system and a method for using the same. The device includes a water storage tank, a constant temperature heating device, a dissolved oxygen regulating device, a circulating water pump, a circulating water bypass filtering device, a suspended matter generating bypass, a 0° erosion corrosion simulation component, and a 45° erosion corrosion simulation component. The test device can accurately regulate the pH value, dissolved oxygen content, suspended matter content, and flow rate of the circulating water. The erosion corrosion simulation component uses the SCAL type indirect cooling system aluminum tube spare parts as the test object. The internal structure of the simulation component is designed with reference to the on-site aluminum tube use environment, and can more realistically simulate the water flow state at the aluminum tube nozzle position during system operation. Two experimental bypasses are designed in the device, which can simultaneously simulate the erosion corrosion of the aluminum tube nozzles in the system with erosion angles of 0° and 45°.

Description

Technical Field

[0001] The invention belongs to the field of laboratory material corrosion research simulation devices, and in particular relates to an erosion corrosion simulation test device for an aluminum radiator in an indirect cooling system and a use method thereof. Background Art

[0002] The SCAL intercooling system has gradually become the main form of steam condensation system in thermal power plants. The radiator of this intercooling system is made of pure aluminum. The pure aluminum material improves the heat exchange efficiency of the radiator, and its low density allows the radiator to be arranged vertically, reducing the floor space of the intercooling tower. However, the hardness of aluminum is low, and the surface oxide film is destroyed in the parts that are strongly impacted by the water flow, which is very prone to erosion corrosion. Many power plants that use this type of intercooling system have experienced erosion corrosion of the aluminum tube mouths in the early stage of commissioning or after a period of operation, and even caused radiators to leak, threatening safe production. According to current research, erosion corrosion of aluminum tube mouths is the most dangerous form of corrosion in this type of intercooling system.

[0003] Erosion corrosion is the result of the interaction between mechanical erosion and electrochemical corrosion. This type of corrosion is affected by many factors, including the quality of circulating water, the content of suspended matter in the water, the local water flow velocity, and the flow state. The SCAL intercooling system uses demineralized water as circulating water. The buffering capacity of circulating water is poor, and the pH value often increases abnormally. Pure aluminum is an amphoteric metal, and both acidic and alkaline circulating water will corrode it. The circulating water of this type of intercooling system contains a lot of suspended matter, including corrosion products formed by corrosion of carbon steel pipes and gravel that has not been flushed clean inside the system. Suspended matter will also aggravate the erosion corrosion of aluminum tubes. In addition, the radiator structure of the SCAL intercooling system is relatively special. The circulating water first enters the water collecting tank from the main pipe, and is distributed to each cooling tube by the water collecting tank. The distance between the water collecting tank inlet and the aluminum tube inlet pipe is short, and the angle of water flow impacting each aluminum tube is also different. There is a certain gap at the connection between the aluminum tube and the bottom water collecting tank, and the water flow will form a turbulent state here. Therefore, the factors affecting the erosion corrosion of aluminum tubes in the SCAL type indirect cooling system are relatively complex. However, there is currently little research on the erosion corrosion simulation test device for aluminum radiators in the indirect cooling system. Summary of the invention

[0004] In order to solve the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide an erosion-corrosion simulation test device for an aluminum radiator in an indirect cooling system and a method of using the same. The device can accurately control the pH value, dissolved oxygen content, suspended matter content and flow rate of the circulating water, and truly simulate the water flow angle and flow state in the local area of ​​the aluminum tube of the radiator of the SCAL type indirect cooling system. By referring to the method of using the device, the influence of a single factor on the erosion-corrosion of the pipe mouth of the aluminum radiator in the SCAL type indirect cooling system can be studied.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solution:

[0006] A simulation test device for scouring and corrosion of aluminum radiators in an indirect cooling system, comprising a circulating water tank; a water tank filling valve and a thermometer are installed on the top of the circulating water tank, and a constant temperature heating device, a water discharge valve, an air charging valve and a porous ring pipe are installed at the bottom of the circulating water tank; the air charging valve is arranged on the air charging pipe, and the air charging pipe is connected with the porous ring pipe;

[0007] The water outlet pipe at the bottom of the circulating water tank is connected to the circulating water main line through a circulating water pump, and the circulating water main line is connected to two parallel test bypasses, the first test bypass includes a first test bypass flowmeter and a 0° scour corrosion simulation component; the second test bypass includes a second test bypass flowmeter and a 45° scour corrosion simulation component, and the first test bypass and the second test bypass are both connected to the first water inlet pipe of the circulating water tank; two aluminum tube specimens are respectively arranged in the 0° scour corrosion simulation component and the 45° scour corrosion simulation component;

[0008] Between the circulating water pump and the first test bypass, a suspended matter filtration bypass, a flow regulating bypass, a first carbon steel corrosion bypass and a second carbon steel corrosion bypass are led out in sequence.

[0009] As a further improvement of the present invention, a flow regulating valve and a bypass water return valve are provided on the flow regulating bypass, and the bypass water return valve is connected to the second water inlet pipe of the circulating water tank.

[0010] As a further improvement of the present invention, the suspended matter filtration bypass includes a suspended matter filtration bypass water inlet valve, a suspended matter filtration device and a suspended matter filtration bypass water outlet valve which are arranged in sequence; the suspended matter filtration device is filled with quartz sand and anthracite; the suspended matter filtration bypass water outlet valve is connected to the bypass return water valve.

[0011] As a further improvement of the present invention, the first carbon steel corrosion bypass includes a first carbon steel corrosion bypass water inlet valve, a first carbon steel corrosion pipe section and a first carbon steel corrosion bypass return water valve arranged in sequence, and the first carbon steel corrosion bypass return water valve is connected to the bypass return water valve.

[0012] As a further improvement of the present invention, the second carbon steel corrosion bypass includes a second carbon steel corrosion bypass water inlet valve, a second carbon steel corrosion pipe section and a second carbon steel corrosion bypass return water valve which are arranged in sequence, and the second carbon steel corrosion bypass return water valve is connected to the bypass return water valve.

[0013] As a further improvement of the present invention, a sampling valve is introduced on the circulating water main line, and a sampling port is connected behind the valve.

[0014] As a further improvement of the present invention, the 0° scour corrosion simulation assembly comprises a bottom flange, a bottom drainage pipe, a water collecting tank structure simulation device and a first aluminum tube sample, a top drainage pipe and a top flange; the bottom flange, the bottom drainage pipe, the water collecting tank structure simulation device, the top drainage pipe and the top flange are connected in sequence, the first aluminum tube sample is arranged in the top drainage pipe, and the bottom of the first aluminum tube sample extends into the water collecting tank structure simulation device;

[0015] The bottom of the rod of the water collecting tank structure simulation component in the 0° scour corrosion simulation component is grooved for tight bonding with the bottom drainage pipe.

[0016] 8. The erosion-corrosion simulation test device for aluminum radiator of indirect cooling system according to claim 1 is characterized in that, as a further improvement of the present invention, the 45° erosion-corrosion simulation component includes a bottom flange, a bottom V-shaped drainage pipe, a reinforcing rib plate, a water collecting tank structure simulation component, a second aluminum tube sample, a top drainage pipe and a top flange; the bottom flange, the bottom V-shaped drainage pipe, the water collecting tank structure simulation component, the top drainage pipe and the top flange are connected in sequence, the second aluminum tube sample is arranged in the top drainage pipe, and the bottom of the second aluminum tube sample is arranged in the water collecting tank structure simulation component.

[0017] As a further improvement of the present invention, the bottom of the water collecting tank structure simulation component in the 45° scour and corrosion simulation device is not grooved, and is directly bonded to the bottom V-shaped drainage pipe. The angle between the upper and lower parts of the V-shaped drainage pipe is °, and the angle between the upper part of the V-shaped drainage pipe and the water collecting tank structure simulation component is 45°; a reinforcing rib plate is bonded between the upper and lower parts of the V-shaped drainage pipe.

[0018] A method for using an erosion corrosion simulation test device for an aluminum radiator in an indirect cooling system comprises the following steps:

[0019] Install the 0° scour corrosion simulation component and the 45° scour corrosion simulation component on the simulation test bench, open the water tank filling valve to inject desalted water into the water tank; turn on the constant temperature heating device, and set the intercooling circulating water temperature to be simulated; after the temperature rises to the target value, open the flow regulating valve and the bypass return valve, open the first test bypass flow regulating valve, the second test bypass flow regulating valve, the second bypass return valve, the return valve, and start the circulating water pump, and adjust the first test bypass flow meter and the second test bypass flow meter to the flow target value by adjusting the opening of the flow regulating valve, the first test bypass flow regulating valve and the second test bypass flow regulating valve;

[0020] By opening the sampling port valve, sampling is conducted from the sampling port to detect pH changes in the circulating water;

[0021] Open the first carbon steel corrosion bypass water inlet valve and the first carbon steel corrosion bypass water outlet valve to allow part of the circulating water to flow through the carbon steel pipe section; continue to open the second carbon steel corrosion bypass water inlet valve and the second carbon steel corrosion bypass water outlet valve to allow part of the circulating water to flow through the carbon steel pipe section, and take samples through the sampling port to analyze the content of suspended matter in the circulating water;

[0022] The corrosion conditions of the aluminum tube specimens in the 0° erosion-corrosion simulation assembly and the 45° erosion-corrosion simulation assembly were compared.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] The device of the present invention can accurately control the pH value, dissolved oxygen content, suspended matter content and flow rate of circulating water. By referring to the use method thereof, the influence of a single factor on the scouring corrosion of the pipe mouth of the aluminum radiator of the SCAL type intercooling system can be studied; two experimental bypasses are designed in the device, which can simultaneously simulate the scouring corrosion of the aluminum pipe mouth with scouring angles of 0° and 45° in the system. The scouring corrosion simulation component of the device of the present invention uses the aluminum tube spare parts of the SCAL type intercooling system as test samples, and the internal structure of the simulation component is designed with reference to the on-site aluminum tube use environment, which can more realistically simulate the water flow state at the aluminum tube nozzle position during the system operation; the test device can accurately adjust the pH value, dissolved oxygen content, suspended matter content and flow rate of the circulating water, and the influence of a single factor on the scouring corrosion of the aluminum radiator nozzle of the SCAL type intercooling system can be studied with reference to the use method thereof; wherein the scouring corrosion simulation component uses the aluminum tube spare parts of the SCAL type intercooling system as test objects, and the internal structure of the simulation component is designed with reference to the on-site aluminum tube use environment, which can more realistically simulate the water flow state at the aluminum tube nozzle position during the system operation; the device is made of transparent organic glass, and the corrosion damage of the aluminum tube can be observed in real time; two experimental bypasses are designed in the device, which can simultaneously simulate the scouring corrosion of the aluminum tube nozzles with scouring angles of 0° and 45° in the system.

[0025] Furthermore, the erosion corrosion simulation component of the device of the present invention is made of transparent organic glass, which can observe the corrosion damage of the aluminum tube and the flow state of water around the aluminum tube mouth in real time.

[0026] Furthermore, the device of the present invention is provided with a carbon steel corrosion bypass, which can simulate the formation process of suspended matter in the circulating water of the indirect cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the erosion corrosion simulation test device of the present invention;

[0028] Figure 2 This is a schematic diagram of a 0° erosion-corrosion simulation component in the present invention;

[0029] Figure 3This is a schematic diagram of a 45° erosion-corrosion simulation component in the present invention;

[0030] Figure 4 Schematic diagram of key dimensions of the local structural simulation components of the water collecting tank in the present invention; (a) is the main view, (b) is the top view;

[0031] Figure 5 It is a schematic diagram of the key dimensions of the assembly position of the aluminum tube sample and the water collecting tank simulation component in the present invention. DETAILED DESCRIPTION

[0032] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings 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 are within the protection scope of the present invention.

[0033] The present invention is further described in conjunction with the accompanying drawings and specific embodiments.

[0034] like Figure 1 As shown, a simulation test device for erosion corrosion of aluminum radiator of indirect cooling system includes a circulating water tank 40, a water tank filling valve 1 and a thermometer 4 are installed on the top of the circulating water tank 40, and a constant temperature heating device 3, a drain valve 2, an air charging valve 5 and a porous ring pipe 6 for air charging are installed at the bottom of the circulating water tank 40. The air charging valve 5 is arranged on the air charging pipe, and the inner end of the air charging pipe is connected with the porous ring pipe 6.

[0035] The circulating water is drawn out from the bottom of the circulating water tank 40, and after being pressurized by the circulating water pump 7, it flows through the first test bypass flow regulating valve 18, the first test bypass flow meter 20, enters the 0° scour corrosion simulation component 22, and returns to the circulating water tank 40 through the return valve 42. A second test bypass is drawn out between the first test bypass flow regulating valve 18 and the first test bypass flow meter 20. The second test bypass includes a second test bypass flow regulating valve 19, a second test bypass flow meter 21, a 45° scour corrosion simulation component, and a second bypass return valve 24. Before the second test bypass merges into the return valve 42, the circulating water flows through the return valve 42 and returns to the circulating water tank 40. Between the circulating water pump 7 and the first test bypass flow regulating valve 18, a suspended solids filtration bypass, a flow regulating bypass, a first carbon steel corrosion bypass, and a second carbon steel corrosion bypass are drawn out in sequence. The flow regulating bypass is provided with a flow regulating valve 11 and a bypass return valve 41. The suspended matter filtration bypass is composed of a suspended matter filtration bypass water inlet valve 8, a suspended matter filtration device 9 and a suspended matter filtration bypass water outlet valve 10. The suspended matter filtration device is filled with quartz sand and anthracite for removing suspended matter in the circulating water. After the circulating water flows through the suspended matter filtration bypass, it flows into the flow regulating bypass in front of the bypass return valve 41 and finally flows through the bypass return valve 41 to return to the circulating water tank 40.

[0036] The first carbon steel corrosion bypass is provided with a first carbon steel corrosion bypass water inlet valve 12, a first carbon steel corrosion pipe section 43 and a first carbon steel corrosion bypass water return valve 15. After the circulating water flows through the first carbon steel corrosion bypass, it flows into the flow regulating bypass from before the bypass water return valve 41, and finally flows through the bypass water return valve 41 to return to the circulating water tank 40. The second carbon steel corrosion bypass is provided with a second carbon steel corrosion bypass water inlet valve 13, a second carbon steel corrosion pipe section 44 and a second carbon steel corrosion bypass water return valve 14. After the circulating water flows through the second carbon steel corrosion bypass, it flows into the flow regulating bypass from before the bypass water return valve 41, and finally flows through the bypass water return valve 41 to return to the circulating water tank. A sampling valve 16 is drawn out from the circulating water main line, and a sampling port 17 is connected behind the valve. All of the above parts are connected with 304 stainless steel pipes.

[0037] like Figure 2 As shown, the 0° erosion corrosion simulation assembly 22 is composed of a bottom flange 31, a bottom drainage pipe 30, a water collecting tank structure simulation device 29, a first aluminum tube sample 28, a top drainage pipe 27 and a top flange 25. The bottom flange 31, the bottom drainage pipe 30, the water collecting tank structure simulation device 29, the top drainage pipe 27 and the top flange 25 are connected in sequence, the first aluminum tube sample 28 is arranged in the top drainage pipe 27, and the bottom of the first aluminum tube sample 28 extends into the water collecting tank structure simulation device 29.

[0038] like Figure 3As shown, the 45° erosion corrosion simulation component 23 is composed of a bottom flange 39, a bottom V-shaped drainage pipe 37, a reinforcing rib plate 38, a water collecting tank structure simulation component 35, a second aluminum tube sample 34, a top drainage pipe 33 and a top flange 32. The bottom flange 39, the bottom V-shaped drainage pipe 37, the water collecting tank structure simulation component 35, the top drainage pipe 33 and the top flange 32 are connected in sequence, the second aluminum tube sample 34 is arranged in the top drainage pipe 33, and the bottom of the second aluminum tube sample 34 is arranged in the water collecting tank structure simulation component 35.

[0039] The water collecting tank structure simulation components are all made of organic glass rods with a diameter of φ=70mm and a height of 14mm. The top center is opened with a circular hole of φ=35mm with a depth of 5mm; a circular hole of φ=28mm with a depth of 3mm; and a circular hole of φ=24mm with a depth of 6mm. The bottom of the rod of the water collecting tank structure simulation component in the 0° scour corrosion simulation device is grooved for tight bonding with the bottom drainage pipe. The bottom of the water collecting tank structure simulation component in the 45° scour corrosion simulation device is not grooved, but directly bonded to the bottom V-shaped drainage pipe 37. The angle between the upper and lower parts of the V-shaped drainage pipe 37 is 90°, and the angle between the upper part of the V-shaped drainage pipe 37 and the water collecting tank structure simulation component is 45°. A reinforcing rib plate 38 is bonded between the upper and lower parts of the V-shaped drainage pipe to enhance structural stability.

[0040] like Figure 4 As shown, the radiator aluminum tube used in the SCAL type intercooling system has an outer diameter of 26mm and a wall thickness of 1mm. In the present invention, the aluminum tube stock is cut into aluminum tube samples with a length of 30mm. The top drainage tube 33 and the top drainage tube 27 are made of organic glass tubes with an inner diameter of 25mm and an outer diameter of 35mm. The aluminum tube sample is inserted into the top drainage tube to a depth of 25.5mm. The organic glass tube is processed using a lathe to ensure that the aluminum tube can be closely matched with the top drainage tube. Figure 5 As shown, after the aluminum tube and the top drainage pipe are assembled, they are bonded to the water collecting tank structure simulation component. After bonding, the gap between the aluminum tube specimen and the second-level circular hole of the water collecting tank structure simulation component is 1 mm, and the vertical distance between the bottom of the aluminum tube and the top edge of the third-level circular hole of the water collecting tank structure simulation component is 1.5 mm.

[0041] The present invention also provides a method for using the erosion-corrosion simulation device, comprising the following steps:

[0042] Install the 0° scour corrosion simulation component 22 and the 45° scour corrosion simulation component 23 on the simulation test bench, open the water tank filling valve 1 to inject deionized water into the water tank 40. Turn on the constant temperature heating device 3 and set the intercooling circulating water temperature to be simulated. After the temperature rises to the target value, open the flow regulating valve 11 and the bypass return valve 41, open the first test bypass flow regulating valve 18, the second test bypass flow regulating valve 19, the second bypass return valve 24, and the return valve 42, and turn on the circulating water pump 7. By adjusting the opening of the flow regulating valve 11, the first test bypass flow regulating valve 18, and the second test bypass flow regulating valve 19, adjust the first test bypass flow meter 20 and the second test bypass flow meter 21 to the flow target value. When studying the effect of circulating water pH on aluminum tube scour corrosion, an appropriate amount of alkaline substance (such as 0.1mol / LNaOH solution) can be added through the water tank filling valve, and the sampling port valve 16 can be opened to sample the circulating water pH change from the sampling port 17. When studying the effect of suspended matter in circulating water on erosion corrosion of aluminum tubes, the first carbon steel corrosion bypass water inlet valve 12 and the first carbon steel corrosion bypass water outlet valve 15 can be opened to allow part of the circulating water to flow through the carbon steel pipe section 43. If you want to further increase the content of suspended matter, you can continue to open the second carbon steel corrosion bypass water inlet valve 13 and the second carbon steel corrosion bypass water outlet valve 14 to allow part of the circulating water to flow through the carbon steel pipe section 44, and sample and analyze the content of suspended matter in the circulating water through the sampling port 17. When the content of suspended matter is high, the filter device water inlet valve 8 and the filter device water outlet valve 10 can be opened to allow part of the circulating water to flow through the filter device 9 to reduce the content of suspended matter in the circulating water. When studying the effect of dissolved oxygen content in circulating water on erosion corrosion of aluminum tubes, valve 5 can be opened to introduce nitrogen, and at the same time, the water tank water injection valve 1 can be opened. After the nitrogen is dispersed through the porous ring tube 6, the dissolved oxygen content in the circulating water is reduced. By comparing the corrosion conditions of the aluminum tube specimens in the 0° scour corrosion simulation assembly 22 and the 45° scour corrosion simulation assembly 23, the effect of the water flow scour angle on the scour corrosion conditions can be studied.

[0043] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A simulation test device for erosion and corrosion of aluminum radiator in an indirect cooling system, characterized in that: It comprises a circulating water tank (40); the top of the circulating water tank (40) is provided with a water tank filling valve (1) and a thermometer (4); the bottom of the circulating water tank (40) is provided with a constant temperature heating device (3), a water discharge valve (2), an air charging valve (5) and a porous annular tube (6); the air charging valve (5) is arranged on the air charging tube, and the air charging tube is connected to the porous annular tube (6); The water outlet pipe at the bottom of the circulating water tank (40) is connected to the circulating water main line through a circulating water pump (7), and the circulating water main line is connected to two parallel test bypasses, the first test bypass includes a first test bypass flow meter (20) and a 0° scour corrosion simulation component (22); the second test bypass includes a second test bypass flow meter (21) and a 45° scour corrosion simulation component (23), and both the first test bypass and the second test bypass are connected to the first water inlet pipe of the circulating water tank (40); two aluminum tube specimens are respectively arranged in the 0° scour corrosion simulation component (22) and the 45° scour corrosion simulation component (23); Between the circulating water pump (7) and the first test bypass, a suspended matter filtration bypass, a flow regulating bypass, a first carbon steel corrosion bypass and a second carbon steel corrosion bypass are sequentially led out; The 0° erosion corrosion simulation component (22) comprises a bottom flange (31), a bottom drainage pipe (30), a water collecting tank structure simulation device (29) and a first aluminum tube sample (28), a top drainage pipe (27) and a top flange (25); the bottom flange (31), the bottom drainage pipe (30), the water collecting tank structure simulation device (29), the top drainage pipe (27) and the top flange (25) are connected in sequence, the first aluminum tube sample (28) is arranged in the top drainage pipe (27), and the bottom of the first aluminum tube sample (28) extends into the water collecting tank structure simulation device (29); The bottom of the rod of the water collecting tank structure simulation component in the 0° scour corrosion simulation component (22) is grooved for tightly bonding with the bottom drainage pipe; The 45° erosion corrosion simulation component (23) comprises a bottom flange (39), a bottom V-shaped drainage pipe (37), a reinforcing rib plate (38), a water collecting tank structure simulation component (35), a second aluminum tube sample (34), a top drainage pipe (33) and a top flange (32); the bottom flange (39), the bottom V-shaped drainage pipe (37), the water collecting tank structure simulation component (35), the top drainage pipe (33) and the top flange (32) are connected in sequence, the second aluminum tube sample (34) is arranged in the top drainage pipe (33), and the bottom of the second aluminum tube sample (34) is arranged in the water collecting tank structure simulation component (35).

2. The erosion corrosion simulation test device for aluminum radiator of indirect cooling system according to claim 1 is characterized in that: The flow regulating bypass is provided with a flow regulating valve (11) and a bypass water return valve (41), and the bypass water return valve (41) is connected to the second water inlet pipe of the circulating water tank (40).

3. The erosion corrosion simulation test device for aluminum radiator of indirect cooling system according to claim 2 is characterized in that: The suspended matter filter bypass comprises a suspended matter filter bypass water inlet valve (8), a suspended matter filter device (9) and a suspended matter filter bypass water outlet valve (10) which are arranged in sequence; the suspended matter filter device contains quartz sand and anthracite; and the suspended matter filter bypass water outlet valve (10) is connected to the bypass return water valve (41).

4. The erosion corrosion simulation test device for aluminum radiator of indirect cooling system according to claim 2 is characterized in that: The first carbon steel corrosion bypass comprises a first carbon steel corrosion bypass water inlet valve (12), a first carbon steel corrosion pipe section (43) and a first carbon steel corrosion bypass water return valve (15) which are arranged in sequence; the first carbon steel corrosion bypass water return valve (15) is connected to the bypass water return valve (41).

5. The erosion corrosion simulation test device for aluminum radiator of indirect cooling system according to claim 2 is characterized in that: The second carbon steel corrosion bypass comprises a second carbon steel corrosion bypass water inlet valve (13), a second carbon steel corrosion pipe section (44) and a second carbon steel corrosion bypass water return valve (14) which are arranged in sequence, and the second carbon steel corrosion bypass water return valve (14) is connected to the bypass water return valve (41).

6. The erosion corrosion simulation test device for aluminum radiator of indirect cooling system according to claim 1 is characterized in that: A sampling valve (16) is led out from the circulating water main line, and a sampling port (17) is connected behind the valve.

7. The erosion corrosion simulation test device for aluminum radiator of indirect cooling system according to claim 1 is characterized in that: In the 45° scour corrosion simulation device, the bottom of the water collecting tank structure simulation component is not grooved and is directly bonded to the bottom V-shaped drainage pipe (37); the angle between the upper and lower parts of the V-shaped drainage pipe (37) is (90)°, and the angle between the upper part of the V-shaped drainage pipe (37) and the water collecting tank structure simulation component is 45°; a reinforcing rib plate (38) is bonded between the upper and lower parts of the V-shaped drainage pipe.

8. The method for using the erosion corrosion simulation test device for aluminum radiator of indirect cooling system according to any one of claims 1 to 7, characterized in that: The following steps are involved: The 0° erosion corrosion simulation component (22) and the 45° erosion corrosion simulation component (23) are mounted on a simulation test bench, and the water tank filling valve (1) is opened to inject demineralized water into the water tank (40); Turn on the constant temperature heating device (3) and set the intercooling circulating water temperature to be simulated; after the temperature rises to the target value, open the flow regulating valve (11) and the bypass return water valve (41), open the first test bypass flow regulating valve (18), the second test bypass flow regulating valve (19), the second bypass return water valve (24), and the return water valve (42), and start the circulating water pump (7); by adjusting the opening of the flow regulating valve (11), the first test bypass flow regulating valve (18), and the second test bypass flow regulating valve (19), adjust the first test bypass flow meter (20) and the second test bypass flow meter (21) to the flow target value; By opening the sampling port valve (16), sampling is taken from the sampling port (17) to detect pH changes in the circulating water; Open the first carbon steel corrosion bypass water inlet valve (12) and the first carbon steel corrosion bypass water outlet valve (15) to allow part of the circulating water to flow through the carbon steel pipe section (43); continue to open the second carbon steel corrosion bypass water inlet valve (13) and the second carbon steel corrosion bypass water outlet valve (14) to allow part of the circulating water to flow through the carbon steel pipe section (44), and sample and analyze the suspended matter content in the circulating water through the sampling port (17); The corrosion conditions of the aluminum tube specimens in the 0° erosion corrosion simulation assembly (22) and the 45° erosion corrosion simulation assembly (23) were compared.

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