Apparatus and method for synergistic photothermal degradation of sulfur hexafluoride using 304 stainless steel

Abstract

The present invention relates to the technical field of sulfur hexafluoride degradation, and in particular, to an apparatus and a method for synergistic photothermal degradation of sulfur hexafluoride using 304 stainless steel. The apparatus comprises: a gas introduction assembly, comprising a mixing component and a control component, the control component being disposed on the mixing component; a degradation assembly, comprising a heating component, an irradiation component, and a container component, the heating component being disposed on the mixing component, the irradiation component being disposed on the heating component, and the container component being disposed on the heating component; and a cooling and exhaust assembly, comprising a cooling component and an exhaust component, the cooling component being disposed on the heating component, and the exhaust component being disposed on the cooling component. The apparatus can achieve degradation of high-concentration SF6 with high efficiency and fast degradation rate and can directly display the content of degradation products, making data inspection very convenient. During a degradation process of SF6, even under high-temperature conditions, the experimental equipment will not be damaged.

Description

An apparatus and method for the combined photothermal and thermal degradation of sulfur hexafluoride in 304 stainless steel. Technical Field

[0001] This invention relates to the technical field of sulfur hexafluoride degradation, and more particularly to an apparatus and method for the combined photothermal and photochemical degradation of sulfur hexafluoride in 304 stainless steel. Background Technology

[0002] In recent years, with the rapid development of the global economy, the demand for SF6 has been increasing, while new environmentally friendly insulating gases are still under research, and humanity is facing an increasingly severe problem of SF6 control. Currently, the world uses more than 10,000 tons of SF6 gas annually, with over 80% used in the power industry. Therefore, how to recycle and discharge SF6 waste gas has become a hot topic in the field of power environmental protection.

[0003] Various methods have been researched and applied for SF6 waste gas treatment, including thermocatalytic degradation, photolysis, and electrolysis. Low-temperature plasma treatment technology has attracted considerable attention due to its advantages such as convenience, simplicity, low energy consumption, and thorough treatment. Furthermore, existing patents cover the collection, purification, and storage of SF6 gas, as well as the treatment of SF6 waste gas using methods such as thermal pyrolysis and water washing.

[0004] In the process of exploring efficient degradation of SF6 waste gas that is difficult to reuse or is about to be decommissioned, the study found that 304 stainless steel has a positive effect on the degradation of SF6 waste gas. Based on this discovery, a device and method for the combined photothermal and photothermal degradation of sulfur hexafluoride by 304 stainless steel were developed. Summary of the Invention

[0005] In view of the aforementioned problems with the efficient degradation of SF6 waste gas, which is difficult to reuse or is about to be decommissioned, this invention is proposed.

[0006] Therefore, the purpose of this invention is to provide an apparatus for the combined photothermal and photochemical degradation of sulfur hexafluoride in 304 stainless steel.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a device for the combined photothermal and chemical degradation of sulfur hexafluoride in 304 stainless steel, comprising,

[0008] A ventilation assembly includes a mixing element and a control element, wherein the control element is disposed on the mixing element;

[0009] A degradation component includes a heating element, an irradiation element, and a container, wherein the heating element is disposed on the gas mixing element, the irradiation element is disposed on the heating element, and the container is disposed on the heating element; and,

[0010] A cooling exhaust assembly includes a cooling component and an exhaust component, wherein the cooling component is disposed on the heating component and the exhaust component is disposed on the cooling component.

[0011] As a preferred embodiment of the device for the combined photothermal degradation of sulfur hexafluoride in 304 stainless steel according to the present invention, the gas mixing component includes a first gas cylinder, a second gas cylinder, and a third gas cylinder arranged in parallel, and a gas mixing instrument is fixedly connected to the first gas cylinder, the second gas cylinder, and the third gas cylinder.

[0012] As a preferred embodiment of the device for the combined photothermal degradation of sulfur hexafluoride in 304 stainless steel according to the present invention, the control components include a first solenoid valve provided on the first gas cylinder, a second solenoid valve provided on the second gas cylinder, a third solenoid valve provided on the third gas cylinder, and a fourth solenoid valve provided on the gas mixing instrument.

[0013] As a preferred embodiment of the device for the combined photothermal and thermal degradation of sulfur hexafluoride in 304 stainless steel according to the present invention, the heating element includes a quartz tube fixedly connected to one side of the gas mixing instrument, and a tubular reactor connected to the outside of the quartz tube.

[0014] As a preferred embodiment of the apparatus for the combined photothermal and synergistic degradation of sulfur hexafluoride in 304 stainless steel according to the present invention, the irradiation element includes a UV lamp tube surrounding the tubular reactor.

[0015] As a preferred embodiment of the apparatus for the combined photothermal and synergistic degradation of sulfur hexafluoride by 304 stainless steel according to the present invention, the container includes a 304 stainless steel body fixedly connected to the inner wall of the tubular reactor.

[0016] As a preferred embodiment of the device for the combined photothermal and thermal degradation of sulfur hexafluoride in 304 stainless steel according to the present invention, the cooling component includes a cooling machine fixedly connected to one side of the tubular reactor, and a liquid collector fixedly connected to one side of the cooling machine.

[0017] As a preferred embodiment of the device for the combined photothermal and thermal degradation of sulfur hexafluoride in 304 stainless steel according to the present invention, the exhaust gas component includes a dryer fixedly connected to one side of the cooling machine, a concentration detector fixedly connected to one side of the dryer, and an exhaust gas collector fixedly connected to one side of the concentration detector.

[0018] An apparatus and method for the combined photothermal and thermal degradation of sulfur hexafluoride in 304 stainless steel, comprising the above-mentioned apparatus for the combined photothermal and thermal degradation of sulfur hexafluoride in 304 stainless steel, including the following steps:

[0019] The dilution ratio is controlled by a solenoid valve to prepare the mixed gas;

[0020] The mixed gas is introduced into the photothermal combined reactor for degradation;

[0021] The degradation efficiency of SF6 waste gas is monitored in real time using cooling and drying equipment.

[0022] As a preferred embodiment of the apparatus and method for the combined photothermal degradation of sulfur hexafluoride in 304 stainless steel according to the present invention, the method is as follows: precise control is achieved through three solenoid valves, and the amount of SF6 mixed gas added is adjusted in real time according to the gas pressure of the gas mixing device during the gas circulation process.

[0023] The beneficial effects of this invention are as follows: This invention can be connected to gas storage cylinders containing Ar, SF6, and H2, which not only improves the degradation efficiency of SF6 and enables deep processing of SF6 products, but also accelerates the degradation rate of SF6. Furthermore, it is equipped with an SF6 detector, allowing for direct and rapid observation of the SF6 degradation efficiency. The cooling and drying devices connected to the downstream of the photothermal combined reactor protect the equipment from damage caused by gases released during the high-temperature, high-heat reaction in the reactor.

[0024] The main advantages of using this invention are as follows:

[0025] (1) It can achieve high concentration SF6 degradation with high degradation efficiency and fast degradation rate;

[0026] (2) It can intuitively display the content of degradation components, making data collection very convenient;

[0027] (3) During the degradation of SF6, even under high temperature conditions, the experimental equipment will not be damaged. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 is a schematic diagram of the overall structure of the device for the combined photothermal and synergistic degradation of sulfur hexafluoride in 304 stainless steel according to the present invention.

[0030] Figure 2 is a schematic diagram of the various structural connections of the device for the combined photothermal and synergistic degradation of sulfur hexafluoride in 304 stainless steel according to the present invention. Detailed Implementation

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0034] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include the three-dimensional spatial dimensions of length, width, and depth.

[0035] Example 1

[0036] Referring to Figures 1-2, the first embodiment of the present invention provides a device for the combined photothermal and synergistic degradation of sulfur hexafluoride in 304 stainless steel. This device includes a ventilation component 100, which includes a gas mixing component 101 and a control component 102, with the control component 102 disposed on the gas mixing component 101.

[0037] The degradation component includes a heating element 201, an irradiation element 202, and a container 203. The heating element 201 is disposed on the gas mixing element 101, the irradiation element 202 is disposed on the heating element 201, and the container 203 is disposed on the heating element 201.

[0038] Specifically, the gas mixing unit 101 includes a first gas cylinder 101a, a second gas cylinder 101b, and a third gas cylinder 101c arranged side by side, and a gas mixing instrument 101d fixedly connected to the first gas cylinder 101a, the second gas cylinder 101b, and the third gas cylinder 101c.

[0039] Furthermore, the control unit 102 includes a first solenoid valve 102a disposed on the first gas cylinder 101a, a second solenoid valve 102b disposed on the second gas cylinder 101b, a third solenoid valve 102c disposed on the third gas cylinder 101c, and a fourth solenoid valve 102d disposed on the gas mixing instrument 101d.

[0040] Furthermore, the heating element 201 includes a quartz tube 201a fixedly connected to one side of the gas mixing instrument 101d, and a tubular reactor 201b connected to the outside of the quartz tube 201a.

[0041] Furthermore, the irradiation element 202 includes a UV lamp tube surrounding the tubular reactor 201b.

[0042] Furthermore, the container 203 includes a 304 stainless steel body 203a fixedly connected to the inner wall of the tubular reactor 201b.

[0043] During operation, the flow rates of H2, Ar, and SF6 are controlled by solenoid valves to achieve the desired ratio of the three gases. The reactor consists of a tubular reactor 201b and a quartz tube 201a. The reactor primarily provides the required temperature for the reaction, allowing the gases to react within a temperature range of 100-900℃ through the quartz tube 201a. An ultraviolet irradiation system provides a UV light source to the inner wall of the reactor. The 304 stainless steel inside the reactor is cleaned with alcohol and then dried for 4 hours to remove surface impurities before being installed in the quartz tube 201a. After the reaction, the gases are piped into a cooling device to prevent damage to the equipment from the high-temperature gases. A liquid collection device is also installed after the cooling device to collect the liquefied gases. Finally, after drying, the gases are passed through an SF6 detector to measure the degradation efficiency of the entire apparatus.

[0044] The combined photothermal reactor 200 includes at least inlet and outlet ports to ensure internal airflow. The connection parts of the cooling device, liquid collection device, drying device, and SF6 detector must also be made of Teflon tubing to prevent corrosion.

[0045] Example 2

[0046] Referring to Figures 1-2, the second embodiment of the present invention provides a device for the combined photothermal and thermal degradation of sulfur hexafluoride in 304 stainless steel. This device includes a cooling and exhaust assembly 300, which includes a cooling element 301 and an exhaust element 302. The cooling element 301 is disposed on the heating element 201, and the exhaust element 302 is disposed on the cooling element 301.

[0047] Specifically, the cooling component 301 includes a cooling unit 301a fixedly connected to one side of the tubular reactor 201b, and a liquid collector 301b fixedly connected to one side of the cooling unit 301a.

[0048] Furthermore, the exhaust gas component 302 includes a dryer 302a fixedly connected to one side of the cooling unit 301a, a concentration detector 302b fixedly connected to one side of the dryer 302a, and an exhaust gas collector 302c fixedly connected to one side of the concentration detector 302b.

[0049] During operation, the gas cylinders contain both H2 and SF6 exhaust gas, with Ar as the carrier gas. SF6 exhaust gas is typically also collected in gas cylinders. During use, the gas in the cylinders is discharged through a solenoid valve, which can also control the shut-off of the gas supply. When using the device, first open the main valve of the carrier gas cylinder, initially setting the absolute pressure to approximately 0.1 MPa, then open the solenoid valve to release the gas, allowing it to enter the gas mixing device. After gas mixing is completed, the mixed gas is introduced into the photothermal combined reactor 200. In the reactor, the heating device consists of a tubular reactor 201b and a quartz tube 201a. The reactor primarily provides the temperature required for the reaction. The gas passes through the quartz tube 201a within the reactor and reacts within a temperature range of 100-900℃. An ultraviolet light source is installed inside the reactor to provide ultraviolet light irradiation for the reaction. After passing through the photothermal combined reactor 200, the high-temperature gas is discharged into a cooling device to prevent damage to the experimental equipment. After cooling, the liquefied gas is collected by a liquid handling device, and the remaining gas is then discharged into a drying device for drying. After the gas is processed, it is introduced into an SF6 concentration detector 302b, which can visually reflect the degree of SF6 degradation. Finally, the exhaust gas is collected and treated.

[0050] Example 3

[0051] Referring to Figures 1-2, the third embodiment of the present invention provides an apparatus and method for the combined photothermal and photochemical degradation of sulfur hexafluoride in 304 stainless steel, comprising the following:

[0052] S1. Each gas cylinder is connected to a gas mixing device via a solenoid valve. Gas mixing is carried out in the gas mixing device, and the mixed gas is then introduced into the photothermal combined reactor 200 for complete reaction.

[0053] S2. After the reaction is complete, the reacted gas is passed into a cooling device to prevent the high-temperature gas from damaging the experimental equipment. After cooling, the liquefied gas will be collected by a liquid collection device, and the remaining gas will be dried before SF6 concentration detection.

[0054] S3. The treated gas is then fed into the exhaust gas collection device for further processing.

[0055] S4. After the device has finished operating, it should be shut down in the order of gas lines first, then electrical lines. First, close the main valve of the SF6 cylinder, then close the solenoid valve. Wait a few minutes to allow the reaction device to completely degrade the remaining SF6 mixture before turning off the power. Finally, close the carrier gas valve to ensure that the carrier gas has flushed out the remaining SF6 gas in the gas pipes and the reaction device.

[0056] After the equipment has finished operating, it should be shut down in the order of gas path first, then electrical path. Because there may be uncertainties in the reaction process, this section only describes the shutdown of the gas path. First, close the main valve of the SF6 cylinder, and then close the solenoid valve. Afterward, wait a few minutes for the reaction unit to completely degrade the remaining SF6 mixture before turning off the power. Note that the carrier gas path should be shut down last, as it needs to purge the remaining SF6 gas from the gas pipe and the reaction unit. Finally, close the carrier gas valve, following the same shutdown order as the SF6 path.

[0057] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., variations in the size, scale, structure, shape, and proportion of various elements, as well as parameter values, mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, changes, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0058] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0059] It should be understood that numerous specific implementation decisions can be made during the development of any actual implementation method, and in any engineering or design project. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A device for the combined photothermal and thermal degradation of sulfur hexafluoride using 304 stainless steel, characterized in that: include, A ventilation assembly (100) includes a mixing element (101) and a control element (102), the control element (102) being disposed on the mixing element (101); as well as The degradation assembly includes a heating element (201), an irradiation element (202), and a container (203), wherein the heating element (201) is disposed on the gas mixing element (101), the irradiation element (202) is disposed on the heating element (201), and the container (203) is disposed on the heating element (201); and, A cooling exhaust assembly (300) includes a cooling component (301) and an exhaust component (302), wherein the cooling component (301) is disposed on the heating component (201) and the exhaust component (302) is disposed on the cooling component (301).

2. The apparatus for the combined photothermal and synergistic degradation of sulfur hexafluoride in 304 stainless steel according to claim 1, characterized in that: The gas mixing unit (101) includes a first gas cylinder (101a), a second gas cylinder (101b), and a third gas cylinder (101c) arranged side by side, and a gas mixing instrument (101d) is fixedly connected to the first gas cylinder (101a), the second gas cylinder (101b), and the third gas cylinder (101c).

3. The apparatus for the combined photothermal and synergistic degradation of sulfur hexafluoride in 304 stainless steel according to claim 2, characterized in that: The control unit (102) includes a first solenoid valve (102a) provided on the first gas cylinder (101a), a second solenoid valve (102b) provided on the second gas cylinder (101b), a third solenoid valve (102c) provided on the third gas cylinder (101c), and a fourth solenoid valve (102d) provided on the gas mixing instrument (101d).

4. The apparatus for the combined photothermal and synergistic degradation of sulfur hexafluoride in 304 stainless steel according to claim 2 or 3, characterized in that: The heating element (201) includes a quartz tube (201a) fixedly connected to one side of the gas mixing instrument (101d), and a tubular reactor (201b) connected to the outside of the quartz tube (201a).

5. The apparatus for the combined photothermal and synergistic degradation of sulfur hexafluoride in 304 stainless steel according to claim 4, characterized in that: The irradiation element (202) includes a UV lamp tube surrounding the tubular reactor (201b).

6. The apparatus for the combined photothermal and synergistic degradation of sulfur hexafluoride in 304 stainless steel according to claim 5, characterized in that: The container (203) includes a 304 stainless steel body (203a) fixedly connected to the inner wall of the tubular reactor (201b).

7. The apparatus for the combined photothermal and synergistic degradation of sulfur hexafluoride in 304 stainless steel according to claim 6, characterized in that: The cooling component (301) includes a cooling machine (301a) fixedly connected to one side of the tubular reactor (201b), and a liquid collector (301b) fixedly connected to one side of the cooling machine (301a).

8. The apparatus for the combined photothermal and synergistic degradation of sulfur hexafluoride in 304 stainless steel according to claim 7, characterized in that: The exhaust gas component (302) includes a dryer (302a) fixedly connected to one side of the cooling machine (301a), a concentration detector (302b) fixedly connected to one side of the dryer (302a), and an exhaust gas collector (302c) fixedly connected to one side of the concentration detector (302b).

9. An apparatus and method for the combined photothermal and thermal degradation of sulfur hexafluoride in 304 stainless steel, characterized in that: The apparatus for the combined photothermal and synergistic degradation of sulfur hexafluoride in 304 stainless steel as described in any one of claims 1 to 8 includes the following steps: The dilution ratio is controlled by a solenoid valve to prepare the mixed gas; The mixed gas is introduced into the photothermal combined reactor (200) for degradation; The degradation efficiency of SF6 waste gas is monitored in real time using cooling and drying equipment.

10. The apparatus and method for the combined photothermal and thermal degradation of sulfur hexafluoride in 304 stainless steel according to claim 9, characterized in that: Precise control is achieved through three solenoid valves. At the same time, during the gas circulation process, the three solenoid valves are adjusted according to the gas pressure of the gas mixing device to regulate the amount of SF6 mixed gas added in real time.

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