Gas high-temperature reaction simulation test equipment and test method

Abstract

The invention relates to the technical field of electrical equipment operation and maintenance, and discloses gas high-temperature reaction simulation test equipment and a test method.The equipment comprises a first tank body used for containing gas to be tested and a second tank body surrounding the first tank body, a hollow interlayer is formed between the first tank body and the second tank body, and a heating device is arranged in the hollow interlayer. According to the invention, the heating device is arranged in the hollow interlayer and is not in contact with the to-be-tested gas, so that substances contained in the heating device are prevented from reacting with the to-be-tested gas to influence the accuracy of a gas high-temperature reaction characteristic analysis result, and the accuracy of a gas high-temperature reaction simulation test is improved; the heating device is not in contact with the first tank body, and the first tank body is heated in a radiation and convection manner, so that the phenomenon that the temperature of the gas in the first tank body is not uniform is reduced, the temperature detection device in the first tank body can more reliably obtain the reaction temperature of the gas to be tested, and the accuracy of the gas high-temperature reaction simulation test is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment operation and maintenance, and in particular to a gas high-temperature reaction simulation test device and a test method. Background Art

[0002] Environmentally friendly insulating gases such as C4F7N and CF3SO2F have excellent insulation performance, relatively stable physical and chemical properties, short atmospheric life, and their global warming potential (GWP) is much lower than that of SF6. Applying environmentally friendly insulating gases to high-voltage equipment such as gas-insulated metal-enclosed switchgear (GIS) and gas-insulated metal-enclosed lines (GIL) can significantly reduce the greenhouse effect.

[0003] However, when there are defects such as poor contact, magnetic saturation, or overload inside gas-insulated electrical equipment, the thermal stability of the problem area will be destroyed, resulting in local overheating failures in the gas-insulated electrical equipment. Under the influence of overheating failures, the environmentally friendly insulating gas may crack after being heated, or react chemically with other gases mixed with it, causing the insulation performance to deteriorate and threatening the reliability of the safe operation of gas-insulated electrical equipment. Therefore, it is of great significance to evaluate the state of environmentally friendly insulating gases when used in electrical equipment by experimentally simulating the reaction of different environmentally friendly insulating gases or mixed gases of environmentally friendly insulating gases and other gases at high temperatures, and by detecting the composition of the reaction products to reveal their high-temperature reaction characteristics.

[0004] In order to reduce the heating cost, the existing gas high temperature reaction simulation test device adopts a resistive heating device, and it is built into the reaction vessel to directly heat the gas in the container, such as the invention patent "Simulation device for overheating fault of contact surface of sulfur hexafluoride gas insulation equipment" with application publication number CN102520289A. Although this method can produce a local high temperature environment near the heating part of the heating device, the gas temperature in the reaction vessel is relatively uneven due to the extremely high gas temperature near the surface of the heating part, which makes the accuracy of the insulating gas reaction temperature obtained by the temperature detection device in the reaction vessel poor; and the resistive heating device may contain carbon elements (impurities or additives for improving resistance performance). When conducting high temperature cracking tests of carbon-containing environmentally friendly insulating gases such as C4F7N, CF3SO2F and their mixed gases, the C element in the heating device may react with the mixed gas under high temperature environment, making it difficult to determine whether the C element in the C-containing decomposition gas such as CO2, CO or CF4 produced by the reaction comes from the carbon-containing environmentally friendly insulating gas or the heating device, affecting the accuracy of the subsequent gas high temperature reaction characteristic analysis. Summary of the invention

[0005] The invention provides a gas high temperature reaction simulation test device and a test method, which solve the technical problem of poor accuracy of the gas high temperature reaction simulation test.

[0006] A first aspect of the present invention provides a gas high temperature reaction simulation test device, comprising: a first tank body for containing a gas to be tested and a second tank body surrounding the first tank body;

[0007] A hollow interlayer is formed between the first tank body and the second tank body;

[0008] A heating device is arranged in the hollow interlayer, and a heat generating portion of the heating device does not contact the first tank body.

[0009] Optionally, the hollow interlayer is a semi-open space.

[0010] Optionally, the first tank body includes a main body and a cover body sealed and covered with the main body.

[0011] Optionally, the second tank body is a tank body with an opening at the top;

[0012] An annular support member is provided on the outer edge of the opening of the main body of the first tank;

[0013] The annular support member is supported at the opening of the second tank body, the bottom of the annular support member is in contact with the opening of the second tank body, and the first tank body completely covers the opening of the second tank body.

[0014] Optionally, fins are arranged outside the opening of the second tank body.

[0015] Optionally, the gas high temperature reaction simulation test equipment further comprises a second valve;

[0016] The first tank body is provided with a first gas inlet and outlet;

[0017] The first gas inlet and outlet are connected to the second valve through a pipeline;

[0018] The second valve is a pressure relief valve.

[0019] Optionally, the hollow interlayer is a closed space.

[0020] Optionally, the gas high temperature reaction simulation test equipment further includes a fourth valve;

[0021] The second tank body is provided with a second gas inlet and outlet;

[0022] The second gas inlet and outlet are connected to the fourth valve through a pipeline;

[0023] The fourth valve is a pressure relief valve.

[0024] Optionally, the gas high temperature reaction simulation test equipment further comprises a temperature detection device for detecting the temperature of the gas to be tested in the first tank;

[0025] The temperature sensing portion of the temperature detection device extends into the first tank body.

[0026] A second aspect of the present invention provides a gas high temperature reaction simulation test method, which relates to a gas high temperature reaction simulation test device as described in any one of the above items, comprising:

[0027] Check the air tightness of the gas high temperature reaction simulation test equipment and perform gas washing;

[0028] Filling the test gas into the first tank of the gas high temperature reaction simulation test equipment until the gas pressure in the first tank meets the target gas pressure value of the test gas required for the test, stopping the filling and leaving it to stand for a second preset time;

[0029] When the air pressure in the first tank body reaches stability, the inflation of the first tank body is completed;

[0030] Starting the heating device of the gas high temperature reaction simulation test equipment to heat the gas in the first tank to the reaction temperature and keep the temperature constant;

[0031] After the heat preservation is completed and the temperature inside the first tank returns to room temperature, the components of the reactants inside the first tank are detected, and the high-temperature reaction characteristics of the gas to be tested are analyzed based on the detection results.

[0032] It can be seen from the above technical solutions that the present invention has the following advantages:

[0033] The present invention provides a gas high temperature reaction simulation test device and test method, the device includes a first tank body for accommodating the gas to be tested and a second tank body surrounding the first tank body, a hollow interlayer is formed between the first tank body and the second tank body, and a heating device is arranged in the hollow interlayer. In the present invention, the heating device is arranged in the hollow interlayer and does not contact the gas to be tested, so as to avoid the substance contained in the heating device reacting with the gas to be tested at high temperature to affect the accuracy of the gas high temperature reaction characteristic analysis result, thereby improving the accuracy of the gas high temperature reaction simulation test; and the heating device does not contact the first tank body, and heats the first tank body by radiation and convection, thereby reducing the phenomenon of uneven gas temperature in the first tank body to a certain extent, so that the temperature detection device in the first tank body can more reliably obtain the reaction temperature of the gas to be tested, further improving the accuracy of the gas high temperature reaction simulation test. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0035] Figure 1 A schematic diagram of the structure of a gas high temperature reaction simulation test device provided in Example 1 of the present invention;

[0036] Figure 2 A schematic cross-sectional structure diagram of a gas high temperature reaction simulation test device provided in Example 1 of the present invention;

[0037] Figure 3 A schematic cross-sectional structure diagram of a gas high temperature reaction simulation test device provided in Example 1 of the present invention;

[0038] Figure 4 A flow chart of the steps of a gas high temperature reaction simulation test method provided in Example 2 of the present invention;

[0039] Figure 5 This is a graph showing component detection results of a high temperature reaction simulation test of a CF3SO2F / N2 mixed gas at different temperatures provided in Example 2 of the present invention.

[0040] Description of the drawings: 1-first tank body; 11-main body; 12-cover body; 13-seal; 14-annular support; 2-second tank body; 21-fins; 3-hollow interlayer; 4-heating device; 51-first air pressure detection device; 52-first valve; 53-second valve; 6-thermal insulation layer; 7-explosion-proof layer; 8-temperature detection device; 9-display module. DETAILED DESCRIPTION

[0041] The embodiments of the present invention provide a gas high temperature reaction simulation test device and a test method, which are used to solve the technical problem of poor accuracy of the gas high temperature reaction simulation test.

[0042] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below 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 scope of protection of the present invention.

[0043] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0044] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] See also Figures 1 to 3 , Embodiment 1 of the present invention provides a gas high temperature reaction simulation test device, comprising a first tank body 1 for containing a gas to be tested and a second tank body 2 surrounding the first tank body 1;

[0046] A hollow interlayer 3 is formed between the first tank body 1 and the second tank body 2;

[0047] A heating device 4 is provided in the hollow interlayer 3 , and a heating portion of the heating device 4 is not in contact with the first can body 1 .

[0048] It can be understood that the first tank body 1 is a reaction container for the gas to be tested, and the first tank body 1 is a sealed space for containing the gas to be tested; since the gas will expand and react to increase its volume after being heated, the first tank body 1 is preferably a metal tank body with a certain thickness that can withstand high temperature and high pressure; specifically, the gas high-temperature reaction simulation test equipment provided in this embodiment also includes a temperature detection device 8 for detecting the temperature of the gas to be tested in the first tank body 1, and the temperature sensing part of the temperature detection device 8 extends into the first tank body 1; the gas high-temperature reaction simulation test equipment can also include a first An air pressure detection device 51 and a first valve 52, a first gas inlet and outlet are provided on the first tank body 1, the first gas inlet and outlet are connected to the first air pressure detection device 51 through a pipeline, the first air pressure detection device 51 is connected to one port of the first valve 52 through a pipeline, and the gas can be input into the first tank body 1 from the other port of the valve 52 or output from the first tank body 1; the gas high-temperature reaction simulation test equipment can also include a second valve 53, the second valve 53 is connected to the first gas inlet and outlet through a pipeline, the second valve 53 is a pressure relief valve, which can be automatically opened according to the set pressure value to release excess pressure.

[0049] The first tank body 1 specifically includes a main body 11 and a cover body 12 that can be sealed and connected to the main body 11. The operator can open the cover body to observe whether there is a solid reaction product inside the first tank body 1 and clean the first tank body 1. A seal 13 made of high-temperature resistant materials such as metal or graphite, such as a copper sealing ring, is arranged between the main body 11 and the cover body 12.

[0050] The second tank body 2 can surround the entire first tank body 1 or the main body 11 of the first tank body 1, and a heat preservation and heat insulation layer 6 is arranged outside the second tank body 2, and the heat preservation and heat insulation layer 6 can be made of materials with high temperature resistance and good heat insulation performance such as ceramic fiber, aluminum silicate fiber, microporous calcium silicate; further, one or more explosion-proof layers 7 can be arranged outside the heat preservation and heat insulation layer 6, and the explosion-proof layer 7 can be made of at least one of high-strength materials such as reinforced fiber cement and high-strength steel; the outermost explosion-proof layer 7 can be a high-strength steel plate with explosion-proof holes, and the explosion-proof holes form an array without affecting the protective performance of the high-strength steel plate. When the first tank body 1 and / or the second tank body 2 explode, the explosion wave can be buffered in the explosion-proof holes, reducing the damage of the explosion to the surrounding area and personnel. In the present invention, the selection of materials for each component of the gas high-temperature reaction simulation test equipment should enable the test equipment to meet the conditions of a maximum tolerance temperature of 1000°C and a maximum pressure of 1.2MPa, so as to be suitable for high-temperature reaction simulation tests of different types of gases.

[0051] It should be noted that the hollow interlayer 3 can be a semi-open space or a sealed space; in a preferred implementation of the present embodiment, the hollow interlayer 3 is a semi-open space, and the semi-open space allows a certain degree of air circulation. After the gas in the hollow interlayer 3 is heated and expanded by the heating device 4, it can escape to the outside through the open part of the hollow interlayer 3, thereby avoiding excessive air pressure in the hollow interlayer 3. There is no need to set up additional pressure relief devices to manage the pressure of the hollow interlayer 3, which simplifies the overall design of the device and improves safety; specifically, please refer to Figure 2 or Figure 3 The second tank body 2 is a tank body with an opening at the top. An annular support 14 is provided on the outer edge of the opening of the main body 11 of the first tank body 1. The maximum size of the annular support 14 is larger than the opening size of the second tank body 2. The annular support 14 is supported at the opening of the second tank body 2. The bottom of the annular support 14 contacts the opening of the second tank body 2, so that the first tank body 1 can completely cover the opening of the second tank body 2. The outer side of the main body 11 is completely surrounded by the second tank body 2, and a hollow interlayer 3 is formed between the first tank body 1 and the second tank body 2. At this time, the hollow interlayer 3 is a semi-open space. The gas in the hollow interlayer 3 is heated and expands to overcome the first tank body 1 and the setting After the gravity of other components on the first tank body 1, the air can overflow from the contact surface between the bottom of the annular support 14 and the opening of the second tank body 2, but it is relatively difficult for external air to enter the hollow interlayer 3 from the contact surface between the bottom of the annular support 14 and the opening of the second tank body 2; fins 21 can be provided outside the top opening of the second tank body 2. On the one hand, the fins 21 can play a role in heat dissipation, so that the temperature here is basically maintained slightly higher than the room temperature, avoiding burns to the operators and making the operation safer. On the other hand, the top of the fin 21 can be flush with the opening of the second tank body 2, so that it can support the first tank body 1 together with the opening of the second tank body 2.

[0052] Furthermore, if the hollow interlayer 3 is a semi-open space and the first tank body 1 is connected to the first valve 6, the first valve 6 can automatically open to release excess pressure when the air pressure in the first tank body 1 is greater than a first preset air pressure value. The first preset pressure value is set according to the design maximum working pressure of the first tank body 1 and the pipeline connected to the first tank body 1.

[0053] In another preferred implementation manner of the present embodiment, when the hollow interlayer 3 is a sealed space, the second tank body 2 is preferably a metal tank body with a certain thickness that can withstand high temperature and high pressure, which can be filled with a heat-conducting medium. The heat-conducting medium can be air or other gases with high stability and thermal conductivity, such as helium, nitrogen, etc., or a liquid with a high boiling point and high thermal conductivity. However, the cracking temperature of the liquid used as the heat-conducting medium must be higher than the heating temperature. For example, insulating oil usually cracks when heated to 300°C, while the high-temperature reaction simulation test of environmentally friendly insulating gas needs to be heated to 200°C to 400°C. Therefore, insulating oil is not suitable for filling in the hollow interlayer 3.

[0054] In this preferred embodiment, when the heat-conducting medium in the hollow interlayer 3 is gas, after the heated volume of the gas in the hollow interlayer 3 increases, the pressure applied to the first tank body 1 by the gas to be tested in the first tank body 1 and the gas in the hollow interlayer 3 can be partially offset; the gas high-temperature reaction simulation test equipment can also include a second air pressure detection device and a third valve, a second gas inlet and outlet are provided on the second tank body 2, the second gas inlet and outlet are connected to the second air pressure detection device through a pipeline, the second air pressure detection device is connected to one port of the third valve through a pipeline, and the gas can be input into the hollow interlayer 3 from the other port of the third valve or output from the hollow interlayer 3; the gas high-temperature reaction simulation test equipment can also include a fourth valve, the second gas inlet and outlet are connected to the fourth valve through a pipeline, the fourth valve is a pressure relief valve, which can be automatically opened according to the set pressure value to release excess pressure. Furthermore, if the first tank body 1 is connected If the second valve 53 is opened, when the air pressure in the hollow interlayer 3 is greater than the second preset air pressure value, the fourth valve is automatically opened to release the excess pressure. When the difference between the air pressure in the hollow interlayer 3 and the air pressure in the first tank body 1 is a positive number and the absolute value is greater than the third preset air pressure value, the second valve 53 and the fourth valve are automatically opened to release the excess pressure. When the difference between the air pressure in the hollow interlayer 3 and the air pressure in the first tank body 1 is a negative number and the absolute value is greater than the third preset air pressure value, the second valve 53 is automatically opened to release the excess pressure. The second preset air pressure value is set according to the designed maximum working pressure of the second tank body 2 and the pipeline connected to the second tank body 2, or is set according to the second tank body 2 and the insulation layer and explosion-proof layer arranged outside the second tank body and the pipeline connected to the second tank body 2. The third preset air pressure value is set according to the designed maximum working pressure of the pipeline connected to the first tank body 1 and the first tank body 1.

[0055] The heating device 4 is preferably a resistive heating device, preferably a nickel heating rod or other resistive heating devices with good heat resistance; the heating device 4 is arranged in the hollow interlayer 3, and heats the first tank body 1 by radiation and convection; the number of the heating devices 4 can be one or more; in a preferred embodiment of this embodiment, as Figure 2 As shown, the second tank body 2 surrounds the main body 11 of the first tank body 1, the number of the heating device 4 is one and is arranged at the center of the inner bottom surface of the second tank body 2, and the heating device 4 mainly heats the first tank body 1 through convection of the gas in the hollow interlayer 3; in another preferred embodiment of this embodiment, as Figure 3 As shown, the second tank body 2 surrounds the main body 11 of the first tank body 1, the number of the heating device 4 is more than one, and it is evenly arranged around the outer side of the first tank body 1 in the hollow interlayer 3, and the first tank body 1 is heated by radiation and convection of gas in the hollow interlayer 3.

[0056] In this embodiment, the heating device 4 is arranged in the hollow interlayer 3 and does not contact the gas to be tested, so as to avoid the substance contained in the heating device 4 reacting with the gas to be tested at high temperature to contaminate the reaction product, affect the accuracy of the analysis results of the high-temperature reaction characteristics of the gas, and improve the accuracy of the gas high-temperature reaction simulation test; and the heating device 4 does not contact the first tank body 1, and heats the first tank body 1 by radiation and convection, which reduces the phenomenon of uneven gas temperature in the first tank body 1 to a certain extent, so that the temperature detection device in the first tank body 1 can more reliably obtain the reaction temperature of the gas to be reacted, further improving the accuracy of the gas high-temperature reaction simulation test.

[0057] In a preferred embodiment, the gas high temperature reaction simulation test equipment provided by the present invention further includes an information acquisition module, a display module 9 and a control module;

[0058] The information acquisition module is respectively connected to the display module 9, the control module, the temperature detection device and each air pressure detection device, and the control module is respectively connected to the temperature detection device and each air pressure detection device;

[0059] The information acquisition module is used to collect and record the detection data of each air pressure detection device of the temperature detection device in real time, and is also used to send the collected detection data to the display module 9 and the control module.

[0060] The display module 9 is used to display the received detection data.

[0061] The control module is used to control the heating device 4 to generate heat according to the received detection data and in combination with preset parameters; the preset parameters include but are not limited to the target temperature, temperature rise time, temperature rise rate, and insulation time.

[0062] See also Figure 4 Embodiment 2 of the present invention provides a gas high temperature reaction simulation test method, comprising the following steps:

[0063] Step S1, assembling the gas high temperature reaction simulation test equipment, checking the air tightness of each part of the gas high temperature reaction simulation test equipment, and using buffer gas for gas washing.

[0064] It can be understood that the gas high temperature reaction simulation test equipment used in this embodiment is the gas high temperature reaction simulation test equipment described in any of the above-mentioned embodiments.

[0065] Specifically, step S1 includes the following sub-steps S11 to S13:

[0066] Step S11, use a vacuum pump to evacuate the first tank body 1 until the detection data of the first air pressure detection device 51 does not change, and then turn off the vacuum pump.

[0067] Step S12: If the detection data of the first air pressure detection device 51 does not change within the first preset time period, the air tightness of each part of the gas high temperature reaction simulation test equipment is good.

[0068] The first preset time is preferably 3 hours; if the detection data of the first air pressure detection device 51 changes within the first preset time, the air tightness of each part of the gas high temperature reaction simulation test equipment is unqualified and the test is terminated.

[0069] Step S13, fill the first tank body 1 with the gas to be tested or one of the gases to be tested as buffer gas, and use a vacuum pump to evacuate the first tank body 1 after standing until the detection data of the first air pressure detection device 51 does not change, and then turn off the vacuum pump.

[0070] Step S13 is performed at least three times; before inflation, the first tank body 1 needs to be connected to a gas source of the gas to be tested.

[0071] Step S2, fill the test gas into the first tank body 1 until the air pressure in the first tank body meets the target air pressure value of the test gas required for the test (that is, the detection data of the first air pressure detection device 51 meets the target air pressure value of the test gas required for the test), stop filling and let it stand for a second preset time.

[0072] If a pressure reducing valve is provided between the inflation device and the first tank body 1 , the opening of the pressure reducing valve can be adjusted according to the target pressure value of the test gas before the test gas is filled into the first tank body 1 ; the second preset time length is preferably 5 minutes.

[0073] Step S3: When the air pressure in the first tank body 1 reaches stability (the detection data of the first air pressure detection device 51 no longer changes), the inflation of the first tank body 1 is completed.

[0074] Step S4, start the heating device or control the heating device 4 through the control module to start heating, heat the gas in the first tank body 1 to the reaction temperature and keep it warm.

[0075] The control module can set parameters such as the target temperature in the first tank, heating time, heating rate, and insulation time. The control module can combine the detection data of the temperature detection device and each air pressure detection device and the above parameters to control the heating of the heating device 4.

[0076] Step S5: After the heat preservation is completed and the temperature inside the first tank body returns to room temperature, the components of the reactants in the first tank body 1 are detected, and the high-temperature reaction characteristics of the test gas are analyzed based on the detection results.

[0077] Specifically, the reactants in the first tank body 1 include gas, or gas and solid. The gas in the first tank body 1 can be taken out by a gas extraction device or collected by a sampling bag. The components and concentrations of the gaseous reactants can be detected by gas-mass spectrometry chromatograph, infrared gas analyzer and other equipment. The components of the solid reactants can be detected by X-ray fluorescence spectrometer, atomic absorption spectrometer and other equipment.

[0078] A new type of environmentally friendly insulating gas CF3SO2F and N2 mixed gas is used as an example. The gas parameters used are 0.3MPa 10% CF3SO2 / 90% N2 mixed gas. High temperature reaction simulation tests are carried out at 150℃, 200℃ and 250℃. The 150℃ high temperature reaction simulation test method includes:

[0079] Step S21, check the air tightness of the entire gas high temperature reaction simulation test equipment, and use CF3SO2F or N2 as buffer gas for more than three times of gas washing.

[0080] Step S22, adjusting the pressure reducing valve between the first tank and the gas source, and charging CF3SO2 and N2 into the first tank in proportion, respectively, and the target gas pressure value of the gas to be tested is 0.3 MPa;

[0081] Step S23, when the air pressure in the first tank reaches 0.3 MPa, stop inflating and let it stand for about 5 minutes;

[0082] Step S24: After standing for 5 minutes, when the air pressure in the first tank body reaches stability, the inflation of the first tank body is completed;

[0083] Step S25, according to the experimental needs, set the target temperature, heating time, heating rate, insulation time and other parameters of the temperature inside the first tank in the control module, specifically set to heat from 20°C (room temperature) to 150°C in 10 minutes, keep warm at 150°C for 10 hours, and control the heating device to generate heat through the control module;

[0084] Step S26, after the insulation is completed and the temperature inside the first tank slowly returns to room temperature, open the first valve, use the gas extraction device to extract gas or use a sampling bag to collect a small amount of gas in the first tank, and use a gas mass spectrometer to detect the gas composition and concentration.

[0085] The high temperature reaction simulation test at 200°C and 250°C only requires modifying the target temperature of the control module in step S25; the test results are as follows Figure 5As shown in the figure, the main decomposition gases of the mixed gas of the new environmentally friendly insulating gas CF3SO2F and N2 include CF4, CO2, SF6, COS, SO2, etc., and the content ratio of each decomposition gas at different temperatures is basically the same. This shows that the decomposition mechanism of the mixed gas at different temperatures is similar. Increasing the temperature only speeds up the generation rate of the decomposition products and does not change the types of the decomposition products.

[0086] In a preferred embodiment, the hollow interlayer of the gas high temperature reaction simulation test equipment is a sealed space, the heat conducting medium in the hollow interlayer is gas, and the hollow interlayer is connected to the second air pressure detection device; step S1 also includes checking the air tightness of the hollow interlayer 3, and the specific air tightness checking method can refer to steps S11 to S13;

[0087] After step S1 and before step S4, the following steps are also included:

[0088] Step S31, fill the hollow interlayer 3 with a heat-conducting medium until the air pressure in the hollow interlayer 3 meets the target air pressure value of the heat-conducting gas required for the test (the detection data of the second air pressure detection device meets the target air pressure value of the heat-conducting gas required for the test), stop charging and let it stand for a second preset time.

[0089] Step S32: When the air pressure in the hollow interlayer 3 reaches stability (the detection data of the second air pressure detection device no longer changes), the inflation of the hollow interlayer 3 is completed.

[0090] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas high temperature reaction simulation test equipment, characterized in that: include: A first tank body for containing the gas to be tested and a second tank body surrounding the first tank body; A hollow interlayer is formed between the first tank body and the second tank body; A heating device is arranged in the hollow interlayer, and a heat generating portion of the heating device does not contact the first tank body.

2. The gas high temperature reaction simulation test equipment according to claim 1, characterized in that: The hollow interlayer is a semi-open space.

3. The gas high temperature reaction simulation test equipment according to claim 1 or 2, characterized in that: The first tank body comprises a main body and a cover body sealed and connected to the main body.

4. The gas high temperature reaction simulation test equipment according to claim 3, wherein the second tank body is a tank body with an opening at the top; An annular support member is provided on the outer edge of the opening of the main body of the first tank; The annular support member is supported at the opening of the second tank body, the bottom of the annular support member is in contact with the opening of the second tank body, and the first tank body completely covers the opening of the second tank body.

5. The gas high temperature reaction simulation test equipment according to claim 1, characterized in that: The opening of the second tank body is provided with fins outside.

6. The gas high temperature reaction simulation test equipment according to claim 1, characterized in that: Also included is a second valve; The first tank body is provided with a first gas inlet and outlet; The first gas inlet and outlet are connected to the second valve through a pipeline; The second valve is a pressure relief valve.

7. The gas high temperature reaction simulation test equipment according to claim 1 or 6, characterized in that: The hollow interlayer is a closed space.

8. The gas high temperature reaction simulation test equipment according to claim 7, characterized in that: Also included is a fourth valve; The second tank body is provided with a second gas inlet and outlet; The second gas inlet and outlet are connected to the fourth valve through a pipeline; The fourth valve is a pressure relief valve.

9. The gas high temperature reaction simulation test equipment according to claim 1, characterized in that: Also included is a temperature detection device for detecting the temperature of the gas to be tested in the first tank; The temperature sensing portion of the temperature detection device extends into the first tank body.

10. A gas high temperature reaction simulation test method, relating to the gas high temperature reaction simulation test equipment as claimed in any one of claims 1 to 9, characterized in that: include: Check the air tightness of the gas high temperature reaction simulation test equipment and perform gas washing; Filling the test gas into the first tank of the gas high temperature reaction simulation test equipment until the gas pressure in the first tank meets the target gas pressure value of the test gas required for the test, stopping the filling and leaving it to stand for a second preset time; When the air pressure in the first tank body reaches stability, the inflation of the first tank body is completed; Starting the heating device of the gas high temperature reaction simulation test equipment to heat the gas in the first tank to the reaction temperature and keep the temperature constant; After the heat preservation is completed and the first tank body returns to room temperature, the components of the reactants in the first tank body are detected, and the high-temperature reaction characteristics of the gas to be tested are analyzed based on the detection results.

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