Vapor-liquid two-phase flow erosion corrosion test device and method

Abstract

The invention particularly relates to a vapor-liquid two-phase flow erosion corrosion test device and method, and belongs to the technical field of vapor-liquid two-phase flow erosion corrosion. According to the device, a test section is designed to be detachable, and a visible pipe section is added. According to the method, the device is used for carrying out a vapor-liquid two-phase flow erosion corrosion test. According to the invention, a two-phase flow erosion corrosion test within a certain temperature, pressure and flow range and evaluation of erosion corrosion resistance of a metal material are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of gas-liquid two-phase flow erosion-corrosion, and particularly to a gas-liquid two-phase flow erosion-corrosion test device and method. Background Art

[0002] The gas-liquid two-phase flow phenomenon widely exists in industries such as nuclear power, petroleum, chemical engineering, and ships. Under certain working conditions, the liquid-phase particles in the gas-liquid two-phase continuously and discretely impact the inner wall of the pipeline driven by the high-speed gas flow, causing local continuous damage to the system pipeline and pipeline components such as valves, orifice plates, reducers, etc., that is, erosion-corrosion damage.

[0003] Steam pipelines are important equipment in the power system and are extremely prone to erosion-corrosion damage during operation. Erosion-corrosion damage is mechanical damage, which is characterized by local thinning, a fast thinning speed, and can cause pipeline perforation and leakage in a short time, seriously threatening the reliability and operation safety of the power system. Therefore, it is necessary to study the gas-liquid two-phase flow erosion-corrosion phenomenon itself, as well as the erosion-corrosion resistance performance and damage characteristics of metal materials.

[0004] There are many influencing parameters for gas-liquid two-phase flow erosion-corrosion damage, including but not limited to humidity, flow rate, material composition, geometry, pipe wall roughness, and liquid droplet incident angle. Therefore, a method for testing and evaluating the erosion-corrosion resistance performance of metal materials is needed to control the influencing parameters of gas-liquid two-phase flow erosion-corrosion damage.

[0005] Existing pipe-flow two-phase flow erosion-corrosion performance tests generally use throttling components such as valves and Venturi tubes to reduce pressure, so that the pressure downstream of the throttling component is lower than the saturated vapor pressure at the current temperature to simulate the gas-liquid two-phase flow condition, but cannot fully realize the two-phase flow erosion-corrosion test at a certain temperature, pressure, and flow rate, and cannot quantitatively evaluate the erosion-corrosion resistance performance of materials under specific working conditions. Summary of the Invention

[0006] The purpose of the present invention is to provide a gas-liquid two-phase flow erosion-corrosion test device and method, which can achieve stable control of the thermal parameters of the gas-liquid two-phase flow, and at the same time design the test section to be detachable, increase the visible pipe section, and realize the two-phase flow erosion-corrosion test within a certain temperature, pressure, and flow rate range and the evaluation of the erosion-corrosion resistance performance of metal materials.

[0007] To achieve the above object, on the one hand, the present invention provides a vapor-liquid two-phase flow erosion-corrosion test device, which includes a pressure stabilizing tank, a water tank, a mixer, a dry steam pipeline, a makeup water pipeline, a wet steam pipeline, a condensate pipeline and a detachable test section; the pressure stabilizing tank is provided with a makeup water inlet, a dry steam outlet and a safety valve, the water tank is provided with a water supply outlet, a makeup water outlet and a condensate inlet, the mixer is provided with a water supply inlet, a dry steam inlet and a wet steam outlet, and stop valves are provided at the dry steam outlet, the makeup water inlet, the water supply outlet and the makeup water outlet; the dry steam outlet is connected to the dry steam inlet through the dry steam pipeline, the makeup water outlet is connected to the makeup water inlet through the makeup water pipeline, the water supply outlet is connected to the water supply inlet through the water supply pipeline, and the wet steam outlet is sequentially connected to the wet steam pipeline, the detachable test section, the condensate pipeline and the condensate inlet; the wet steam pipeline is provided with a visible section, the condensate pipeline is provided with a condenser, the makeup water pipeline is provided with a makeup water pump, the water supply pipeline is provided with a water supply pump, and various pipeline components to be verified or studied are installed in the detachable test section.

[0008] As one achievable way, the dry steam pipeline is sequentially provided with a first electric heater, a first pressure gauge, a first thermometer, an orifice flowmeter and a first regulating valve, wherein the first electric heater is close to the pressure stabilizing tank and the first regulating valve is close to the mixer.

[0009] As one achievable way, the water supply pipeline between the water supply pump and the mixer is sequentially provided with a rotameter, a second electric heater, a second pressure gauge and a second thermometer, wherein the rotameter is close to the water supply pump and the second thermometer is close to the mixer.

[0010] As one achievable way, a third pressure gauge and a third thermometer are provided on the wet steam pipeline between the mixer and the visible section.

[0011] As one achievable way, a fourth thermometer, a fourth pressure gauge and a second regulating valve are provided on the condensate pipeline between the detachable test section and the condenser.

[0012] As one achievable way, the mixer is a pipeline type steam-water mixer made of 304 stainless steel; the condenser is a 304 stainless steel water-cooled plate condenser.

[0013] As one achievable way, the detachable test section includes a test section, and test section hanging ears are welded on the test section; both the wet steam pipeline and the condensate pipeline section include straight pipe sections, and straight pipe section hanging ears are welded on the straight pipe sections; the test section and the straight pipe section are connected through flange connectors.

[0014] As one of the feasible ways, the flange connector includes a fixing member, fastening bolts, and connecting bolts; the fixing member is divided into an upper fixing member and a lower fixing member. The upper fixing member is provided with a boss, and the lower fixing member is provided with a groove. The upper fixing member and the lower fixing member form a fixing member through the cooperation of the boss and the groove; on one side of the fixing member, there are a test section hanger groove and a test section connection groove, and on the other side, there is a connecting thread; the test section hanger cooperates with the test section hanger groove, and the test section cooperates with the test section connection groove; the straight pipe section hanger is placed on the threaded side of the fixing member; a sealing gasket is placed between the test section hanger and the straight pipe section hanger; both the upper fixing member and the lower fixing member are provided with fastening threads, and the fastening bolts cooperate with the fastening threads to fasten the upper fixing member and the lower fixing member; the connecting bolts cooperate with the connecting threads to fasten the straight pipe section hanger to the fixing member.

[0015] As one of the feasible ways, the pipeline components include elbows, tees, orifice plates, reducers, and valves.

[0016] To achieve the above object, on the other hand, the present invention provides a method for a vapor-liquid two-phase flow erosion-corrosion test, using the above vapor-liquid two-phase flow erosion-corrosion test device, including the following steps:

[0017] (1), According to the requirements of the vapor-liquid two-phase flow erosion-corrosion test, determine the design pressure, temperature, and flow rate of each pipeline in the vapor-liquid two-phase flow erosion-corrosion test device;

[0018] (2), Verify the reliability and sealing performance of the vapor-liquid two-phase flow erosion-corrosion test device. At this time, the detachable test section is not installed on the vapor-liquid two-phase flow erosion-corrosion test device;

[0019] (3), Measure and record the initial weight, dimensions, and morphology of the detachable test section;

[0020] (4), Install the detachable test section on the vapor-liquid two-phase flow erosion-corrosion test device and conduct a cold-state sealing test on the detachable test section; conduct a normal-temperature pressure test on other pipelines in the vapor-liquid two-phase flow erosion-corrosion test device to detect their sealing performance;

[0021] (5), After the pressure stabilizing tank is filled with water, start heating. After heating to a certain temperature, open the safety valve to discharge air and boost the pressure to the given pressure;

[0022] (6), Start other equipment in the vapor-liquid two-phase flow erosion-corrosion test device;

[0023] (7), Adjust each pipeline in the vapor-liquid two-phase flow erosion-corrosion test device to the design pressure, temperature, and flow rate and maintain a stable state, and then start the vapor-liquid two-phase flow erosion-corrosion test;

[0024] (8), After the vapor-liquid two-phase flow erosion-corrosion test is completed, turn off each equipment in the vapor-liquid two-phase flow erosion-corrosion test device;

[0025] (9). Remove the detachable test section from the vapor-liquid two-phase flow erosion-corrosion test device, analyze the erosion-corrosion morphology of the detachable test section, and evaluate the erosion-corrosion resistance of the detachable test section.

[0026] (10). Conduct a thermal-hydraulic performance analysis of the detachable test section.

[0027] The beneficial effects of the present invention are as follows:

[0028] The vapor-liquid two-phase flow erosion-corrosion test device and method of the present invention enable the control of the temperature, pressure, flow rate, and humidity of wet steam, and realize the vapor-liquid two-phase flow erosion-corrosion test and the evaluation of the erosion-corrosion resistance of pipeline components under certain temperature, pressure, flow rate, and humidity conditions; visually simulate the erosion-corrosion effect of the vapor-liquid two-phase flow on different metal materials through the visual section, and evaluate the reliability, erosion-corrosion resistance, and applicability of metal material components; conduct a comparative study on the mass, internal macroscopic morphology, damage characteristics, and pit depth before and after the test section through the detachable test section; and are applicable to the research of various corrosion damage types under vapor-liquid two-phase flow conditions. Description of the Drawings

[0029] Figure 1 It is a schematic structural diagram of an embodiment of the vapor-liquid two-phase flow erosion-corrosion test device of the present invention;

[0030] Figure 2 It is a schematic structural diagram of an embodiment of the detachable test section;

[0031] Figure 3 It is a front view of an embodiment of the upper fixing part;

[0032] Figure 4 It is a top view of an embodiment of the upper fixing part;

[0033] Figure 5 It is a front view of an embodiment of the lower fixing part;

[0034] Figure 6 It is a top view of an embodiment of the lower fixing part.

[0035] In the figure, 1 is a pressure stabilizing tank; 2 is a first electric heater; 3 is a first pressure gauge; 4 is a first thermometer; 5 is an orifice flowmeter; 6 is a first regulating valve; 7 is a mixer; 8 is a second thermometer; 9 is a second pressure gauge; 10 is a second electric heater; 11 is a rotameter; 12 is a feed water pump; 13 is a third pressure gauge; 14 is a third thermometer; 15 is a visible section; 16 is a detachable test section; 17 is a fourth thermometer; 18 is a fourth pressure gauge; 19 is a second regulating valve; 20 is a condenser; 21 is a water tank; 22 is a make-up water pump; 200 is a fastening thread; 201 is a fastening bolt; 202 is a fixing part; 203 is a connecting bolt; 204 is a straight pipe section; 205 is a connecting thread; 206 is a straight pipe section hanger ear; 207 is a test section hanger ear; 208 is a test section; 209 is a sealing gasket; 210 is a test section connecting groove; 211 is a test piece hanger ear groove; 212 is a boss; 213 is a groove. Detailed implementation manners

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used in the description of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0037] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, terms such as "arranged", "installed", "connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0039] Terms such as "first", "second", "third", "fourth", etc. are only used to distinguish elements with similar attributes and do not indicate or imply relative importance or a specific order. The term "comprising", "including", or any other variant thereof is intended to cover non-exclusive inclusion, including not only those listed elements but also other elements not explicitly listed.

[0040] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0041] See Figures 1-6 Figures 1-6 , this embodiment provides a vapor-liquid two-phase flow erosion-corrosion test device, which includes a pressure stabilizing tank 1, a water tank 21, a mixer 7, a dry steam pipeline, a makeup water pipeline, a wet steam pipeline, a condensate pipeline and a detachable test section 16; a makeup water inlet, a dry steam outlet and a safety valve are provided on the pressure stabilizing tank 1, a water supply outlet, a makeup water outlet and a condensate inlet are provided on the water tank 21, a water supply inlet, a dry steam inlet and a wet steam outlet are provided on the mixer 7, and stop valves are provided at the dry steam outlet, the makeup water inlet, the water supply outlet and the makeup water outlet; the dry steam outlet is connected to the dry steam inlet through a dry steam pipeline, the makeup water outlet is connected to the makeup water inlet through a makeup water pipeline, the water supply outlet is connected to the water supply inlet through a water supply pipeline, and the wet steam outlet is sequentially connected to the wet steam pipeline, the detachable test section 16, the condensate pipeline and the condensate inlet; a visible section 15 is provided on the wet steam pipeline for studying the flow state of the vapor-liquid two-phase flow; a condenser 20 is provided on the condensate pipeline, a makeup water pump 22 is provided on the makeup water pipeline, and a water supply pump 12 is provided on the water supply pipeline.

[0042] The dry steam produced by the pressure stabilizing tank 1 enters the dry steam pipeline through the dry steam outlet and then enters the mixer 7 through the dry steam inlet; the water in the water tank 21 is used as the water supply and enters the water supply pipeline through the water supply outlet via the water supply pump 12 and then enters the mixer 7 through the water supply inlet; the dry steam and the water supply are mixed in the mixer 7 to generate wet steam, which sequentially enters the wet steam pipeline and the detachable test section 16 through the wet steam outlet to form the wet steam after the test; the wet steam after the test enters the condensate pipeline, is condensed by the condenser 20 to form condensate and enters the water tank 21 through the condensate inlet; the water in the water tank 21 is used as makeup water and enters the makeup water pipeline through the makeup water outlet via the makeup water pump 22 and then enters the pressure stabilizing tank 1 through the makeup water inlet.

[0043] In this embodiment, as one of the realizable ways, a first electric heater 2, a first pressure gauge 3, a first thermometer 4, an orifice flowmeter 5 and a first regulating valve 6 are sequentially provided on the dry steam pipeline, wherein the first electric heater 2 is close to the pressure stabilizing tank 1 and the first regulating valve 6 is close to the mixer 7; the first electric heater 2 is used to heat the dry steam; the first pressure gauge 3 is used to measure the dry steam pressure, the first thermometer 4 is used to measure the dry steam temperature, the orifice flowmeter 5 is used to measure the dry steam flow rate, and the first regulating valve 6 is used to adjust the dry steam flow rate.

[0044] In this embodiment, as one of the realizable ways, a rotameter 11, a second electric heater 10, a second pressure gauge 9 and a second thermometer 8 are sequentially provided on the water supply pipeline between the water supply pump 12 and the mixer 7, wherein the rotameter 11 is close to the water supply pump 12 and the second thermometer 8 is close to the mixer 7; the rotameter 11 is used to measure the water supply flow rate, the second electric heater 10 is used to heat the water supply, the second pressure gauge 9 is used to measure the water supply pressure, and the second thermometer 8 is used to measure the water supply temperature.

[0045] In this embodiment, as one of the feasible ways, a third pressure gauge 13 and a third thermometer 14 are provided on the wet steam pipeline between the mixer 7 and the visible section 15; the third pressure gauge 13 is used to measure the wet steam pressure, and the third thermometer 14 is used to measure the wet steam temperature.

[0046] In this embodiment, as one of the feasible ways, a fourth thermometer 17, a fourth pressure gauge 18 and a second regulating valve 19 are provided on the condensate pipeline between the detachable test section 16 and the condenser 20; the fourth pressure gauge 18 is used to measure the wet steam pressure after the test, the fourth thermometer 17 is used to measure the wet steam temperature after the test; the second regulating valve 19 is used to adjust the wet steam flow rate after the test.

[0047] In this embodiment, as one of the feasible ways, the mixer 7 is a pipeline type steam-water mixer, and the material is 304 stainless steel.

[0048] In this embodiment, as one of the feasible ways, the condenser 20 is a 304 stainless steel water-cooled plate condenser.

[0049] In this embodiment, as one of the feasible ways, the rated flow rates of the feed water pump 12 and the make-up water pump 22 are both 0.72 m 3 / s.

[0050] The present invention controls the temperature and pressure of the dry steam through the pressure stabilizing tank 1 and the first electric heater 2, so as to determine the specific enthalpy of the dry steam; controls the temperature and pressure of the feed water through the second electric heater 10, so as to determine the specific enthalpy of the feed water; the dry steam and the high-temperature feed water are fully mixed by the mixer 7 to generate wet steam, and by measuring the temperature and pressure of the wet steam at the outlet of the mixer 7, the specific enthalpy, flow rate and humidity of the wet steam at the outlet of the mixer 7 are determined according to the methods of mass conservation and energy conservation.

[0051] In this embodiment, as one of the feasible ways, the detachable test section 16 includes a test section 208, and a test section hanger 207 is welded to the test section 208; both the wet steam pipeline and the condensate pipeline section include a straight pipe section 204, and a straight pipe section hanger 206 is welded to the straight pipe section; the test section 208 and the straight pipe section 204 are connected by a flange connector.

[0052] In this embodiment, as one of the feasible ways, the flange connector includes a fixing member 202, a fastening bolt 201, and a connecting bolt 203; the fixing member 202 is divided into an upper fixing member and a lower fixing member. The upper fixing member is provided with a boss 212, and the lower fixing member is provided with a groove 213. The upper fixing member and the lower fixing member cooperate through the boss 212 and the groove 213 to form the fixing member 202; on one side of the fixing member 202, there are a test section hanger groove 211 and a test section connection groove 210, and on the other side, there is a connecting thread 205; the test section hanger 207 cooperates with the test section hanger groove 211, and the test section 208 cooperates with the test section connection groove 210; the straight pipe section hanger 206 is placed on the threaded side of the fixing member 202; a sealing gasket 209 is placed between the test section hanger 207 and the straight pipe section hanger 206; both the upper fixing member and the lower fixing member are provided with fastening threads 200, and the fastening bolt 201 cooperates with the fastening threads 200 to fasten the upper fixing member and the lower fixing member; the connecting bolt 203 cooperates with the connecting thread 205 to fasten the straight pipe section hanger 206 to the fixing member 202.

[0053] In this embodiment, as one of the feasible ways, the test section 208 is made of a 304 stainless steel seamless steel pipe that meets the requirements of the GB / T14976 standard.

[0054] In this embodiment, as one of the feasible ways, the sealing gasket 209 is made of a high-temperature resistant polytetrafluoroethylene material.

[0055] In this embodiment, as one of the feasible ways, the detachable test section 16 can be installed with various pipeline components that need to be verified or studied, including but not limited to elbows, tees, orifice plates, reducers, and valves.

[0056] This embodiment also provides a method for the erosion-corrosion test of gas-liquid two-phase flow. Using the above-mentioned gas-liquid two-phase flow erosion-corrosion test device, it includes the following steps:

[0057] (1) According to the requirements of the gas-liquid two-phase flow erosion-corrosion test, determine the design pressure, temperature, and flow rate of each pipeline in the gas-liquid two-phase flow erosion-corrosion test device;

[0058] (2) Verify the reliability and sealing performance of the gas-liquid two-phase flow erosion-corrosion test device. At this time, the detachable test section 16 is not installed on the gas-liquid two-phase flow erosion-corrosion test device;

[0059] (3) Measure and record the initial weight, dimensions, and morphology of the detachable test section 16;

[0060] (4) Install the detachable test section 16 on the gas-liquid two-phase flow erosion-corrosion test device and conduct a cold-state sealing test on the detachable test section 16; conduct a normal-temperature pressure test on other pipelines in the gas-liquid two-phase flow erosion-corrosion test device to detect their sealing performance;

[0061] (5) After the pressure stabilizing tank 1 is filled with water, start heating. After heating to a certain temperature, open the safety valve to discharge air and boost the pressure to the given pressure;

[0062] (6) Start other equipment in the gas-liquid two-phase flow erosion-corrosion test device;

[0063] (7) Adjust each pipeline in the gas-liquid two-phase flow erosion-corrosion test device to the designed pressure, temperature and flow rate, and start the gas-liquid two-phase flow erosion-corrosion test after maintaining a stable state;

[0064] (8) After the gas-liquid two-phase flow erosion-corrosion test is completed, turn off each equipment in the gas-liquid two-phase flow erosion-corrosion test device;

[0065] (9) Remove the detachable test section 16 from the gas-liquid two-phase flow erosion-corrosion test device, analyze the erosion-corrosion morphology of the detachable test section 16, and evaluate the erosion-corrosion resistance of the detachable test section 16;

[0066] (10) Conduct a thermal-hydraulic performance analysis of the detachable test section 16.

[0067] In this embodiment, as one of the realizable ways, the erosion-corrosion resistance of the detachable test section 16 is divided into three grades: high, relatively high and poor.

[0068] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A vapor-liquid two-phase flow erosion-corrosion test device, characterized in that, It includes a pressure stabilizing tank (1), a water tank (21), a mixer (7), a dry steam pipeline, a make-up water pipeline, a wet steam pipeline, a condensate pipeline and a detachable test section (16); the pressure stabilizing tank (1) is provided with a make-up water inlet, a dry steam outlet and a safety valve, the water tank (21) is provided with a feed water outlet, a make-up water outlet and a condensate inlet, the mixer (7) is provided with a feed water inlet, a dry steam inlet and a wet steam outlet, and stop valves are provided at the dry steam outlet, the make-up water inlet, the feed water outlet and the make-up water outlet; the dry steam outlet is connected to the dry steam inlet through the dry steam pipeline, the make-up water outlet is connected to the make-up water inlet through the make-up water pipeline, the feed water outlet is connected to the feed water inlet through the feed water pipeline, and the wet steam outlet is successively connected to the wet steam pipeline, the detachable test section (16), the condensate pipeline and the condensate inlet; the wet steam pipeline is provided with a visible section (15), the condensate pipeline is provided with a condenser (20), the make-up water pipeline is provided with a make-up water pump (22), the feed water pipeline is provided with a feed water pump (12), and various pipeline components to be verified or studied are installed in the detachable test section (16).

2. The vapor-liquid two-phase flow erosion-corrosion test device according to claim 1, wherein A first electric heater (2), a first pressure gauge (3), a first thermometer (4), an orifice flowmeter (5) and a first regulating valve (6) are successively arranged on the dry steam pipeline, wherein the first electric heater (2) is close to the pressure stabilizing tank (1), and the first regulating valve (6) is close to the mixer (7).

3. The vapor-liquid two-phase flow erosion-corrosion test device according to claim 1, wherein A rotameter (11), a second electric heater (10), a second pressure gauge (9) and a second thermometer (8) are successively arranged on the feed water pipeline between the feed water pump (12) and the mixer (7), wherein the rotameter (11) is close to the feed water pump (12), and the second thermometer (8) is close to the mixer (7).

4. The vapor-liquid two-phase flow erosion-corrosion test device according to claim 1, characterized in that A third pressure gauge (13) and a third thermometer (14) are arranged on the wet steam pipeline between the mixer (7) and the visible section (15).

5. The vapor-liquid two-phase flow erosion-corrosion test device according to claim 1, characterized in that, A fourth thermometer (17), a fourth pressure gauge (18) and a second regulating valve (19) are arranged on the condensate pipeline between the detachable test section (16) and the condenser (20).

6. The vapor-liquid two-phase flow erosion-corrosion test device according to claim 1, characterized in that, The detachable test section (16) includes a test section (208), and test section lugs (207) are welded to the test section (208); both the wet steam pipeline and the condensate pipeline section include straight pipe sections (204), and straight pipe section lugs (206) are welded to the straight pipe sections (204); the test section (208) and the straight pipe section (204) are connected through flange connectors.

7. The vapor-liquid two-phase flow erosion-corrosion test device according to claim 6, characterized in that The flange connection includes a fixing member (202), a fastening bolt (201), and a connecting bolt (203); the fixing member (202) is divided into an upper fixing member and a lower fixing member. The upper fixing member is provided with a boss (212), and the lower fixing member is provided with a groove (213). The upper fixing member and the lower fixing member cooperate through the boss (212) and the groove (213) to form the fixing member (202); one side of the fixing member (202) is provided with a test section hanger groove (211) and a test section connection groove (210), and the other side is provided with a connecting thread (205); the test section hanger (207) cooperates with the test section hanger groove (211), and the test section (208) cooperates with the test section connection groove (210); the straight pipe section hanger (206) is placed on the threaded side of the fixing member (202); a sealing gasket (209) is placed between the test section hanger (207) and the straight pipe section hanger (206); both the upper fixing member and the lower fixing member are provided with fastening threads (200), and the fastening bolt (201) cooperates with the fastening threads (200) to fasten the upper fixing member and the lower fixing member; the connecting bolt (203) cooperates with the connecting thread (205) to fasten the straight pipe section hanger (206) to the fixing member (202).

8. The vapor-liquid two-phase flow erosion-corrosion test device according to claim 1, wherein, The pipeline components include elbows, tees, orifice plates, reducers, and valves.

9. The vapor-liquid two-phase flow erosion-corrosion test device according to claim 1, characterized in that, The mixer (7) is a pipeline type steam-water mixer, and the material is 304 stainless steel; the condenser (20) is a 304 stainless steel water-cooled plate condenser.

10. A method for a vapor-liquid two-phase flow erosion-corrosion test, characterized in that, Using the vapor-liquid two-phase flow erosion-corrosion test device according to any one of claims 1-9, the following steps are included: (1). According to the requirements of the vapor-liquid two-phase flow erosion-corrosion test, determine the design pressure, temperature, and flow rate of each pipeline in the vapor-liquid two-phase flow erosion-corrosion test device; (2). Verify the reliability and sealing performance of the vapor-liquid two-phase flow erosion-corrosion test device. At this time, the detachable test section (16) is not installed in the vapor-liquid two-phase flow erosion-corrosion test device; (3). Measure and record the initial weight, size, and morphology of the detachable test section (16); (4). Install the detachable test section (16) on the vapor-liquid two-phase flow erosion-corrosion test device and conduct a cold-state sealing test on the detachable test section (16); conduct a normal temperature pressure test on other pipelines in the vapor-liquid two-phase flow erosion-corrosion test device to detect their sealing performance; (5). After the pressure stabilizing tank (1) is filled with water, start heating. After heating to a certain temperature, open the safety valve to discharge air and boost the pressure to the given pressure; (6). Start other equipment in the vapor-liquid two-phase flow erosion-corrosion test device; (7). Adjust each pipeline in the vapor-liquid two-phase flow erosion-corrosion test device to the design pressure, temperature, and flow rate and maintain a stable state, and then start the vapor-liquid two-phase flow erosion-corrosion test; (8). After the vapor-liquid two-phase flow erosion-corrosion test is completed, turn off each equipment in the vapor-liquid two-phase flow erosion-corrosion test device; (9). Remove the detachable test section (16) from the vapor-liquid two-phase flow erosion-corrosion test device, analyze the erosion-corrosion morphology of the detachable test section (16), and evaluate the anti-erosion-corrosion performance of the detachable test section (16); (10). Conduct a thermal-hydraulic performance analysis of the detachable test section (16).

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