A device and method for studying the effect of primary circuit zinc injection under hydrogen and oxygen controlled conditions

Abstract

The present invention relates to the field of material corrosion technology, and in particular to a research device and method for the effect of zinc injection in a circuit under controlled hydrogen and oxygen conditions. The research device includes a reactor, a water tank, a dosing box, and a hydrogen source. The reactor inlet is connected to the water tank outlet through a first pipeline; the reactor outlet is connected to the water tank inlet through a second pipeline, and the first pipeline and the second pipeline are respectively provided with sampling valves; and also includes a first hydrogen and oxygen detection structure for detecting the hydrogen and oxygen content in the first pipeline, and a second hydrogen and oxygen detection structure for detecting the hydrogen and oxygen content in the second pipeline. The present application adjusts the one-way waterway in the prior art into a circulating waterway. When in use, the corrosion test is only started after it is detected that the zinc concentration and dissolved hydrogen and oxygen content at the reactor inlet and outlet meet the requirements, thereby being able to accurately control the concentration of the test solution in the reactor and ensure the accuracy of the corrosion test data.

Description

Technical Field

[0001] The invention relates to the technical field of material corrosion, in particular to the technical field of material corrosion in zinc-containing primary circuit water, and in particular to a device and method for studying the effect of primary circuit zinc injection under hydrogen and oxygen controlled conditions. Background Art

[0002] The corrosion of the primary circuit equipment and materials of nuclear power plants affects the safety of nuclear power plant reactor operation, the economic efficiency of nuclear power and the life of the power plant. The primary circuit water chemistry control can prevent and mitigate problems such as uniform corrosion, intergranular corrosion and stress corrosion cracking, prevent corrosion products from depositing in the core, and control the radiation dose of the reactor. The primary circuit zinc injection technology of nuclear power plants has produced significant effects on mitigating problems such as stress corrosion cracking, intergranular corrosion and excessive radiation dose. In recent years, some pressurized water reactors (PWRs) have also begun to adopt the widely used primary circuit zinc injection technology to mitigate problems such as excessive radiation dose, intergranular corrosion and stress corrosion cracking (PWSCC).

[0003] Journal documents such as "Uniform Corrosion Behavior of Austenitic Stainless Steel in Zinc-Containing PWR Primary Water", "Uniform Corrosion Behavior of 690 Alloy and 800 Alloy in Zinc-Containing PWR Primary Water", "Study on the Effect of Zn on the Oxide Film Composition of 304 Austenitic Stainless Steel in Simulated Pressurized Water Reactor Primary Water Environment", etc., respectively studied the corrosion behavior of materials in primary water with different zinc concentrations and the corrosion behavior of different materials in primary water with the same zinc concentration. The research schemes are: prepare a solution of a certain zinc concentration, send it and hydrogen into the feed water tank by a circulating pump, and then pump it into the autoclave by a metering pump, and then detect the corrosion of the sample as the immersion time changes.

[0004] However, these research systems are all one-way channels, with the dosing structure in front and the autoclave in the back. Although the zinc concentration in the solution of the dosing structure is determined at the beginning, the solution will change when it passes through the above system: zinc may adhere to the inner wall of the box, pipe, and pump body, causing the zinc concentration to decrease; the next zinc solution may take away the zinc attached to the inner wall when it flows through it, causing the zinc concentration to rise; in short, the zinc concentration of the solution that finally reaches the autoclave may be inconsistent with the zinc concentration prepared at the beginning. The same is true for the content of dissolved hydrogen and oxygen in the solution. Although a dissolved hydrogen and oxygen content detection table is set in the above system, it cannot guarantee that the dissolved hydrogen and oxygen content of the solution will not change after passing through structures such as the water supply tank. The dissolved hydrogen and oxygen content of the solution that finally reaches the autoclave may be inconsistent with the content obtained by the above test. In order to study the effect of zinc concentration in a circuit under hydrogen and oxygen control conditions on material corrosion, it is necessary to ensure the accuracy of zinc concentration and dissolved hydrogen and oxygen content. Summary of the invention

[0005] The present invention aims to solve the above problems and provides a device and method for studying the effect of primary circuit zinc injection under hydrogen and oxygen controlled conditions.

[0006] The technical solution to the problem of the present invention is to first provide a research device for the effect of zinc injection in a single circuit under hydrogen and oxygen controlled conditions, comprising a reactor, a water tank, a dosing box for adding drugs to the water tank, and a hydrogen source for adding hydrogen to the water tank, wherein the reactor inlet is connected to the water tank outlet through a first pipeline; the reactor outlet is connected to the water tank inlet through a second pipeline, and the first pipeline and the second pipeline are respectively provided with sampling valves; the research device also includes a hydrogen and oxygen control system, which includes a first hydrogen and oxygen detection structure for detecting the hydrogen and oxygen content in the first pipeline, and a second hydrogen and oxygen detection structure for detecting the hydrogen and oxygen content in the second pipeline.

[0007] As a preferred embodiment of the present invention, the hydrogen and oxygen control system includes a hydrogen and oxygen detection meter and a sample water two-way switching regulating valve, the sample water two-way switching regulating valve includes a first inlet connected to the first pipeline, a second inlet connected to the second pipeline, and an outlet connected to the hydrogen and oxygen detection meter; when the first inlet is connected to the first pipeline and the second inlet is not connected to the second pipeline, the hydrogen and oxygen detection meter forms the first hydrogen and oxygen detection structure; when the second inlet is connected to the second pipeline and the first inlet is not connected to the first pipeline, the hydrogen and oxygen detection meter forms the second hydrogen and oxygen detection structure.

[0008] As a preferred embodiment of the present invention, the outlet of the sample water two-way switching regulating valve is connected to the second pipeline through a third pipeline, and the hydrogen and oxygen detection meter is arranged on the third pipeline.

[0009] As a preferred embodiment of the present invention, a buffer tank is provided between the second inlet and the second pipeline.

[0010] As a preferred embodiment of the present invention, the hydrogen and oxygen control system also includes a nitrogen bubbling tube and a nitrogen covering tube, the inlet of the nitrogen bubbling tube and the inlet of the nitrogen covering tube are both connected to a nitrogen source, the outlet of the nitrogen bubbling tube is located below the liquid level of the medicine in the medicine dosing box, and the outlet of the nitrogen covering tube is located above the liquid level of the medicine in the medicine dosing box.

[0011] As a preferred embodiment of the present invention, the water tank is connected to the nitrogen source via an air pipe, and the outlet of the air pipe is located below the liquid level of the water body in the water tank; the dosing box is connected to the water tank via a dosing pipe, and the outlet of the dosing pipe is located above the liquid level of the water body in the water tank.

[0012] As a preferred embodiment of the present invention, a high-pressure pump and a heater are provided on the first pipeline.

[0013] As a preferred embodiment of the present invention, a cooler is provided on the second pipeline.

[0014] Another object of the present invention is to provide a method for studying the effect of primary zinc injection under hydrogen and oxygen controlled conditions, comprising the following steps:

[0015] S1. The metal material to be tested is placed in the reactor;

[0016] S2. Add the drug to the dosing box, and maintain the bubbling and covering of the dosing box through the nitrogen bubbling tube and the nitrogen covering tube;

[0017] S3. Detect the hydrogen and oxygen content in the first pipeline and control the hydrogen source switch until the hydrogen and oxygen content meets the requirements of the hot function test of the nuclear power plant;

[0018] S4. Open the reactor inlet valve and add water with qualified hydrogen and oxygen content into the reactor;

[0019] S5. Detect the hydrogen and oxygen content in the second pipeline and control the hydrogen source switch until the hydrogen and oxygen content meets the requirements of the hot function test of the nuclear power plant;

[0020] S6. Adjust the reactor temperature and pressure to the test conditions required during the hot functional test of the nuclear power plant;

[0021] S7. Add medicine to the medicine adding box to the target concentration range;

[0022] S8. Sampling and analysis are performed through the sampling valves of the first pipeline and the second pipeline, and the drugs are added or subtracted from the drug adding box until the zinc concentrations in the first pipeline and the second pipeline reach the target concentration;

[0023] S9. Start the passivation film formation timing of the metal material to be tested;

[0024] S10. After the passivation is completed, the metal material to be tested is taken out, and the surface performance and composition analysis of the material is carried out to evaluate the impact of different zinc concentrations on the primary circuit material of the nuclear power plant itself.

[0025] As a preferred embodiment of the present invention, in step S2, the bubbling and covering of the drug adding box is maintained for 20-40 minutes.

[0026] Beneficial effects of the present invention:

[0027] 1. The present application adjusts the one-way water circuit in the prior art into a circulating water circuit. When in use, the corrosion test is not started until the zinc concentration and dissolved hydrogen and oxygen content at the inlet and outlet of the reactor (i.e., the first pipeline and the second pipeline) are detected to meet the requirements. Therefore, the concentration of the test solution in the reactor can be accurately controlled to ensure the accuracy of the corrosion test data.

[0028] 2. In the present application, the hydrogen and oxygen control system is connected to the water tank through a third pipeline to design a loop, and it is more convenient and accurate to dynamically adjust the hydrogen and oxygen content through the loop; at the same time, the first hydrogen and oxygen detection structure is designed as a loop that does not pass through the reactor to avoid the high hydrogen and oxygen content solution remaining in the reactor during the initial hydrogen and oxygen content adjustment, which will have an adverse effect on subsequent adjustments and tests.

[0029] 3. In the present application, the nitrogen bubbling tube and the nitrogen covering tube are used to maintain the bubbling and covering of the dosing box to reduce the oxygen content in the dosing box and avoid the dynamic influence of the oxygen content in the dosing box on the oxygen content in the circulating water circuit. Similarly, the dosing tube and the air pipe are used to maintain the bubbling and covering of the water tank to reduce the oxygen content in the water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of a device for studying the effect of zinc injection in a single circuit under controlled hydrogen and oxygen conditions;

[0031] In the figure: reactor 1, water tank 2, dosing box 3, first pipeline 41, second pipeline 42, sampling valve 411, third pipeline 43, hydrogen and oxygen detection meter 51, sample water two-way switching regulating valve 52, buffer tank 53, nitrogen bubbling tube 54, nitrogen covering tube 55, high-pressure pump 6, heater 7, cooler 8, heat exchanger 9. DETAILED DESCRIPTION

[0032] The following are specific implementations of the present invention, and in conjunction with the accompanying drawings, the technical solution of the present invention is further described, but the present invention is not limited to these embodiments.

[0033] A device for studying the effect of primary zinc injection under controlled hydrogen and oxygen conditions, such as Figure 1 As shown, it includes a reactor 1, a water tank 2, a dosing box 3, and a hydrogen source.

[0034] Reactor 1 is a 7-liter 316 stainless steel high-temperature and high-pressure reactor, with an inlet and an outlet respectively arranged at its lower part, and a temperature and pressure measuring instrument arranged on it. Reactor 1 is used to accommodate the metal material to be detected and solutions with different zinc concentrations for corrosion reaction research. In order to ensure the comprehensiveness of the corrosion of the metal material to be detected, it is preferred to hang the metal material to be detected in reactor 1. A hook can be arranged at the top of reactor 1, and the metal material to be detected is connected to the hook through a steel wire rope. At the same time, an observation window can be arranged to facilitate observation of the height of the solution in reactor 1 to ensure that the metal material to be detected is completely immersed in the solution.

[0035] The water tank 2 is used to supply zinc-containing hydrogen and oxygen solution into the reactor 1. The water tank 2 is an 80-liter 304 stainless steel water tank. The water tank 2 is connected to the inlet of the reactor 1 through the first pipeline 41. A water supply pump, a high-pressure pump, and a heater are also provided on the first pipeline 41 to supply water through the water supply pump, and the pressure of the reactor 1 is controllable through the high-pressure pump, and the temperature of the reactor is controllable through the heater. In addition, in order to detect the zinc concentration and hydrogen and oxygen concentration of the solution supplied to the reactor 1, a sampling valve 411 and a first hydrogen and oxygen detection structure are also provided on the first pipeline 41. Considering that the zinc, hydrogen and oxygen concentrations detected on the first pipeline 41 cannot accurately represent the concentrations in the reactor 1, the present application adds a second pipeline 42 between the outlet of the reactor 1 and the inlet of the water tank 2, so that the water tank 2 and the reactor 1 form a circulating water circuit. At this time, a sampling valve 411 and a second hydrogen and oxygen detection structure are also set on the second pipeline 42 to detect the zinc concentration and hydrogen and oxygen content of the solution coming out of the reactor 1. When the detection data of the first pipeline 41 and the second pipeline 42 are equal and reach the target concentration, it means that the concentration of the solution in the reactor 1 has reached a stable target concentration. In addition, considering that the solution coming out of the reactor 1 has a certain temperature, it is inconvenient to sample and detect, and it is also inconvenient to directly send it to the water tank 2, so a cooler 8 is also set on the second pipeline 42 to maintain the temperature required for sampling. Furthermore, a heat exchanger 9 is set between the first pipeline 41 and the second pipeline 42, and the heat of the second pipeline 42 is transferred to the first pipeline 41 through the heat exchanger 9 to reduce energy consumption.

[0036] Among them, the first hydrogen and oxygen detection structure and the second hydrogen and oxygen detection structure are realized by a hydrogen and oxygen detection meter 51 and a water sample two-way switching regulating valve 52. The hydrogen and oxygen detection meter 51 is a general term for a dissolved hydrogen meter and a dissolved oxygen meter connected in series. The water sample two-way switching regulating valve 52 includes a first inlet connected to the first pipeline 41, a second inlet connected to the second pipeline 42, and an outlet; the outlet is connected to the second pipeline 42 through a third pipeline 43, a hydrogen and oxygen detection meter 51 is arranged on the third pipeline, and a buffer tank 53 is arranged between the second inlet and the second pipeline 42. When the first inlet is connected to the first pipeline 41 and the second inlet is not connected to the second pipeline 42, the water in the water tank 2 flows to the water sample two-way switching regulating valve 52 through the first pipeline 41, flows through the hydrogen and oxygen detection meter 51, and then flows back to the water tank 2 through the second pipeline 42, forming a loop for detecting the hydrogen and oxygen content in the first pipeline 41. When the second inlet is connected to the second pipeline 42 and the first inlet is not connected to the first pipeline 41, the solution in the reactor 1 flows through the second pipeline 42 through the buffer tank 53 to the sample water two-way switching regulating valve 52, flows through the hydrogen and oxygen detection meter 51, and then returns to the second pipeline 42 and flows back to the water tank 2, which is used for the hydrogen and oxygen content in the outlet solution of the reactor 1. The hydrogen and oxygen detection meter 51 can also be connected to the hydrogen source through a controller, and the controller is used to feed back the hydrogen and oxygen content detection results to the central control system, and the central control system controls the switch of the hydrogen source to accurately control the hydrogen content. In addition, a flow meter is also provided between the hydrogen and oxygen detection meter 51 and the sample water two-way switching regulating valve 52 to monitor the detection flow.

[0037] The hydrogen source is used to introduce hydrogen into the water tank 2 to adjust the hydrogen content in the above-mentioned circulating water circuit. The hydrogen source is connected to the water tank 2 through a hydrogen pipe. It is preferred that the outlet of the hydrogen pipe is set below the liquid level of the water body in the water tank 2 to bubbling hydrogenation, improve hydrogenation efficiency and avoid bringing oxygen into the water tank 2. The hydrogen content in the circulating water circuit needs to be maintained within a certain range, but the oxygen content needs to be as low as possible, so there is no need to set an oxygen source.

[0038] The dosing box 3 is used to adjust the zinc concentration in the above-mentioned circulating water circuit. The dosing box 3 is a 6-liter box body, with a dosing port at the top and an outlet at the bottom, and is connected to the water tank 2 through a dosing pipe, and the dosing pipe is provided with a dosing pump. Oxygen may also be introduced during dosing. In order to control the oxygen content at a lower level, a nitrogen bubbling tube 54 and a nitrogen covering tube 55 are also included. The inlet of the nitrogen bubbling tube 54 and the inlet of the nitrogen covering tube 55 are both connected to a nitrogen source. The outlet of the nitrogen bubbling tube 54 is located below the liquid level of the medicine in the dosing box 3, and the outlet of the nitrogen covering tube 55 is located above the liquid level of the medicine in the dosing box 3. The oxygen content in the dosing box 3 is reduced by bubbling and covering the dosing box 3.

[0039] If the water in the water tank 2 is exposed to air, oxygen may also be dissolved and the oxygen content may increase. Therefore, when the solution in the dosing tank 1 is passed into the water tank 2 through the dosing pipe, it is considered that the outlet of the dosing pipe is located above the liquid level of the water in the water tank 2, and the water is covered by the liquid medicine to avoid contact with oxygen and dissolved oxygen. At the same time, the water tank 2 is also connected to the nitrogen source through an air pipe, and the outlet of the air pipe is located below the liquid level of the water in the water tank 2, and the oxygen content is further reduced by nitrogen bubbling.

[0040] Based on this, a research method using the research device for the effect of primary zinc injection under the above-mentioned hydrogen and oxygen controlled conditions is carried out, comprising the following steps:

[0041] Film forming tests were conducted on 316 material and 690TT material under different zinc concentration conditions. The test parameters are as follows:

[0042] Temperature: 300°C; Pressure: 15-16MPa; Dissolved oxygen content: <100ppb; Dissolved hydrogen content: 2.2-3.1ppm; Lithium content: 0.3-0.8ppm; Zinc concentration: Target concentration 1 (50ppb), Target concentration 2 (100ppb).

[0043] S1. Pretreatment of the test piece: 316 and 690TT test pieces were polished with 2000-grit sandpaper, and the surface oil and various impurities were removed with anhydrous ethanol and deionized water in turn. After cleaning, they were blown dry for later use;

[0044] Preparation of reactor 1: Clean reactor 1 thoroughly by wiping it with anhydrous ethanol and deionized water in turn. In particular, it is necessary to ensure that the sealing groove on the reactor cover is free of debris to ensure high sealing performance of reactor 1.

[0045] Put the sample into the reactor: Wear disposable gloves and hang the sample into the reactor 1.

[0046] S2. First, use 40L high-purity water to clean the experimental circuit for more than 3 times. After sampling and monitoring the impurity ion content in the water to meet the index, add the medicine to the medicine adding box 3, and maintain the bubbling and covering of the medicine adding box 3 for 30 minutes through the nitrogen bubbling tube 54 and the nitrogen covering tube 55.

[0047] S3. Detect the hydrogen and oxygen content in the first pipeline 41 and control the hydrogen source switch until the hydrogen and oxygen content meets the relevant requirements of the nuclear power plant hot function test, that is, dissolved oxygen content: <100ppb; dissolved hydrogen content: 2.2-3.1ppm.

[0048] S4. Open the inlet valve of reactor 1 and add water with qualified hydrogen and oxygen content into reactor 1;

[0049] S5. Detect the hydrogen and oxygen content in the second pipeline 42 and control the hydrogen source switch until the hydrogen and oxygen content meets the relevant requirements of the nuclear power plant hot function test, that is, dissolved oxygen content: <100ppb; dissolved hydrogen content: 2.2-3.1ppm.

[0050] S6. Increase the pressure of the system to 15-16MPa. After the system pressure is stable, check the sealing of reactor 1 to ensure that there is no water leakage or air leakage in reactor 1. After the system pressure is stable, increase the temperature of the system at a heating rate of 2℃ / min to reach the target value of 300℃.

[0051] S7. During the system temperature rise process, the lithium and zinc contents in the dosing box 3 are adjusted to the target concentration range according to the target concentration.

[0052] S8. Sampling and analysis are performed through the sampling valves 411 of the first pipeline 41 and the second pipeline 42, and adjustments are made in real time until the zinc concentrations in the first pipeline 41 and the second pipeline 42 are both at the target concentrations.

[0053] S9. Start the passivation film formation timing.

[0054] S10. When the test time (336 h) is reached, close the reactor 1, wait for the temperature to drop to room temperature, and the pressure to drop to atmospheric pressure, then open the reactor 1 and take out the sample. Wear medical powder-free gloves, take out the samples one by one, register and label them, and use electrochemical impedance spectroscopy to analyze the film formation of 316 material and 690TT material on the metal surface at different zinc concentrations.

[0055] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A method for studying the effect of primary zinc injection under hydrogen and oxygen controlled conditions, characterized in that: The following research apparatus was used: The research device comprises a reactor (1), a water tank (2), a dosing box (3) for adding a drug to the water tank (2), and a hydrogen source for adding hydrogen to the water tank (2); the inlet of the reactor (1) is connected to the outlet of the water tank (2) via a first pipeline (41); the outlet of the reactor (1) is connected to the inlet of the water tank (2) via a second pipeline (42); the first pipeline (41) and the second pipeline (42) are respectively provided with a sampling valve (411); the research device further comprises a hydrogen and oxygen control system, the hydrogen and oxygen control system comprising a first hydrogen and oxygen detection structure for detecting the hydrogen and oxygen content in the first pipeline (41), and a second hydrogen and oxygen detection structure for detecting the hydrogen and oxygen content in the second pipeline (42). The hydrogen and oxygen detection structure; the hydrogen and oxygen control system further comprises a nitrogen bubbling tube (54) and a nitrogen covering tube (55); the inlet of the nitrogen bubbling tube (54) and the inlet of the nitrogen covering tube (55) are both connected to a nitrogen source; the outlet of the nitrogen bubbling tube (54) is located below the liquid level of the medicine in the medicine dosing box (3); the outlet of the nitrogen covering tube (55) is located above the liquid level of the medicine in the medicine dosing box (3); the water tank (2) is connected to the nitrogen source via an air pipe; the outlet of the air pipe is located below the liquid level of the water in the water tank (2); the medicine dosing box (3) is connected to the water tank (2) via a medicine dosing tube; the outlet of the medicine dosing tube is located above the liquid level of the water in the water tank (2); The following steps are involved: S1. The metal material to be tested is placed in the reactor (1); S2. Add the drug to the drug adding box (3), and maintain the bubbling and covering of the drug adding box (3) through the nitrogen bubbling tube (54) and the nitrogen covering tube (55); S3. Detecting the hydrogen and oxygen content in the first pipeline (41) and controlling the hydrogen source switch until the hydrogen and oxygen content meets the requirements of the hot function test of the nuclear power plant; S4. Open the inlet valve of the reactor (1) and add water with qualified hydrogen and oxygen content into the reactor (1); S5. Detecting the hydrogen and oxygen content in the second pipeline (42) and controlling the hydrogen source switch until the hydrogen and oxygen content meets the requirements of the hot function test of the nuclear power plant; S6. The system is pressurized; after the system pressure is stabilized, the reactor (1) is inspected for tightness to ensure that there is no water or air leakage in the reactor (1); after the system pressure is stabilized, the system is heated; S7. During the system heating process, the lithium and zinc contents are adjusted to the target concentration range in the dosing box (3) according to the target concentration; S8. Sampling and analyzing are performed through the sampling valves (411) of the first pipeline (41) and the second pipeline (42), and adding or subtracting drugs to the drug adding box (3) until the zinc concentrations in the first pipeline (41) and the second pipeline (42) reach the target concentrations; S9. Start the passivation film formation timing of the metal material to be tested; S10. After the passivation is completed, the metal material to be tested is taken out, and the surface performance and composition analysis of the material is carried out to evaluate the impact of different zinc concentrations on the primary circuit material of the nuclear power plant itself.

2. The method for studying the effect of primary zinc injection under hydrogen and oxygen controlled conditions according to claim 1, characterized in that: The hydrogen and oxygen control system comprises a hydrogen and oxygen detection meter (51) and a water sample two-way switching regulating valve (52); the water sample two-way switching regulating valve (52) comprises a first inlet connected to the first pipeline (41), a second inlet connected to the second pipeline (42), and an outlet connected to the hydrogen and oxygen detection meter (51); when the first inlet is connected to the first pipeline (41) and the second inlet is not connected to the second pipeline (42), the hydrogen and oxygen detection meter (51) forms the first hydrogen and oxygen detection structure; when the second inlet is connected to the second pipeline (42) and the first inlet is not connected to the first pipeline (41), the hydrogen and oxygen detection meter (51) forms the second hydrogen and oxygen detection structure.

3. The method for studying the effect of primary zinc injection under hydrogen and oxygen controlled conditions according to claim 2, characterized in that: The outlet of the sample water two-way switching regulating valve (52) is connected to the second pipeline (42) via a third pipeline (43), and the hydrogen and oxygen detection meter (51) is arranged on the third pipeline (43).

4. The method for studying the effect of primary zinc injection under hydrogen and oxygen controlled conditions according to claim 2, characterized in that: A buffer tank (53) is provided between the second inlet and the second pipeline (42).

5. The method for studying the effect of primary zinc injection under hydrogen and oxygen controlled conditions according to claim 1, characterized in that: The first pipeline (41) is provided with a high-pressure pump (6) and a heater (7).

6. The method for studying the effect of primary zinc injection under hydrogen and oxygen controlled conditions according to claim 1, characterized in that: A cooler (8) is provided on the second pipeline (42).

7. The method for studying the effect of primary zinc injection under hydrogen and oxygen controlled conditions according to claim 1, characterized in that: In step S2, the bubbling and covering of the drug adding box (3) is maintained for 20-40 minutes.

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