Device and method for degrading sulfur hexafluoride by combining photo-thermal and cooperating with 304 stainless steel

Abstract

The invention relates to the technical field of sulfur hexafluoride degradation, in particular to a device and method for degrading sulfur hexafluoride through photo-thermal combined cooperation with 304 stainless steel, and the device comprises a ventilation assembly which comprises a gas mixing part and a control part, and the control part is arranged on the gas mixing part; the degradation assembly comprises a heating piece, an irradiation piece and a container piece, the heating piece is arranged on the gas mixing piece, the irradiation piece is arranged on the heating piece, and the container piece is arranged on the heating piece; the cooling and exhausting assembly comprises a cooling piece and a tail gas piece, the cooling piece is arranged on the heating piece, the tail gas piece is arranged on the cooling piece, high-concentration SF6 degradation can be achieved, the degradation efficiency is high, and the degradation rate is high; the content of degraded components can be visually displayed, and data investigation is very convenient; in the process of degrading SF6, even in a high-temperature environment, experimental equipment is not damaged.

Description

Technical Field

[0001] The invention relates to the technical field of sulfur hexafluoride degradation, and in particular to a device and method for degrading sulfur hexafluoride by using a combination of light and heat to synergize 304 stainless steel. Background Art

[0002] In recent years, with the rapid development of the global economy, the demand for SF6 has continued to increase, while new environmentally friendly insulating gases are still under research. Humans are facing increasingly severe SF6 governance issues. At present, more than 10,000 tons of SF6 gas are used in the world each year, of which more than 80% are used in the power industry. Therefore, how to recycle and discharge SF6 waste gas has become a hot issue in the field of power environmental protection.

[0003] A variety of methods have been studied and applied for SF6 waste gas treatment, including thermal catalytic degradation, photolysis, electrolysis, etc. Low-temperature plasma treatment technology has attracted much attention due to its convenience, simplicity, low energy consumption, and thorough treatment. In addition, existing patents involve the collection, purification and storage of SF6 gas, as well as the treatment of SF6 waste gas by thermal cracking and water washing.

[0004] In the process of exploring the efficient degradation of SF6 waste gas that is difficult to reuse or is about to be retired, 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 synergistic 304 stainless steel degradation of sulfur hexafluoride were developed. Summary of the invention

[0005] In view of the above-mentioned existing problem of efficiently degrading SF6 waste gas that is difficult to reuse or is about to be retired, the present invention is proposed.

[0006] Therefore, the object of the present invention is to provide a device for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a device for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel, comprising:

[0008] A ventilation component, comprising an air mixing component and a control component, wherein the control component is arranged on the air mixing component;

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

[0010] The cooling exhaust component comprises a cooling component and an exhaust component. The cooling component is arranged on the heating component, and the exhaust component is arranged on the cooling component.

[0011] As a preferred solution of the device for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel of 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 distribution and mixing instrument fixedly connected to the first gas cylinder, the second gas cylinder and the third gas cylinder.

[0012] As a preferred solution of the device for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel of the present invention, the control component includes 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 distribution and mixing instrument.

[0013] As a preferred solution of the device for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel of the present invention, the heating element comprises a quartz tube fixedly connected to one side of the gas distribution and mixing instrument, and a tubular reactor connected to the outside of the quartz tube.

[0014] As a preferred solution of the device for degrading sulfur hexafluoride of 304 stainless steel by combining light and heat in the present invention, the irradiation part includes a violet light tube surrounding the tubular reactor.

[0015] As a preferred solution of the device for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel of the present invention, the container comprises a 304 stainless steel body fixedly connected to the inner wall of the tubular reactor.

[0016] As a preferred solution of the device for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel of 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 solution of the device for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel of 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] A device and method for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel, comprising the above-mentioned device for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel, comprising the following steps:

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

[0020] Passing the mixed gas 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 solution of the device and method for degrading sulfur hexafluoride by 304 stainless steel by combining light and heat in the present invention, precise control is achieved through a three-way solenoid valve, and at the same time, the three-way solenoid valve is adjusted according to the gas pressure of the gas distribution and mixing device during the gas circulation process to control the amount of SF6 mixed gas added in real time.

[0023] Beneficial effects of the present invention: The present invention can be connected to gas cylinders of Ar, SF6 gas and H2, which can not only improve the degradation efficiency of SF6 and achieve deep treatment of SF6 products, but also accelerate the degradation rate of SF6. In addition, an SF6 detector is installed to observe the degradation efficiency of SF6 intuitively and quickly. The cooling device and drying treatment device connected to the rear of the photothermal combined reactor can protect the equipment and prevent the gas released by the high temperature and high heat reaction of the reactor from damaging the experimental equipment.

[0024] The present invention has the following advantages:

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

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

[0027] (3) During the SF6 degradation process, even in a high temperature environment, no damage will be caused to the experimental equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 creative work.

[0029] Figure 1 This is a schematic diagram of the overall structure of a device for degrading sulfur hexafluoride using a combination of light and heat in synergy with 304 stainless steel according to the present invention.

[0030] Figure 2 This is a schematic diagram of the structural connections of a device for degrading sulfur hexafluoride using a combination of light and heat in synergy with 304 stainless steel according to the present invention. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one 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 term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0034] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0035] Example 1

[0036] Reference Figure 1 - Figure 2 , which is the first embodiment of the present invention, provides a device for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel. The device includes a ventilation component 100, including a gas mixing component 101 and a control component 102. The control component 102 is arranged on the gas mixing component 101;

[0037] The degradation component includes a heating element 201 , an irradiation element 202 and a container element 203 . The heating element 201 is arranged on the gas mixing element 101 , the irradiation element 202 is arranged on the heating element 201 , and the container element 203 is arranged 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 in parallel, and a gas distribution and mixing device 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 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 distribution and mixing device 101d.

[0040] Furthermore, the heating element 201 includes a quartz tube 201a fixedly connected to one side of the gas distribution and mixing device 101d, and a tubular reaction furnace 201b connected to the outer side of the quartz tube 201a.

[0041] Furthermore, the irradiation member 202 includes a violet light tube surrounding the tubular reaction furnace 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 the operation, the flow of H2, Ar and SF6 is controlled by solenoid valves to achieve the ratio of the three gases. The tubular reactor 201b and the quartz tube 201a are composed. The reactor mainly provides the temperature required for the reaction. The gas can react within the temperature range of 100-900℃ through the quartz tube 201a in the reactor; the ultraviolet irradiation system can provide ultraviolet light source on the inner wall of the reactor; and the 304 stainless steel inside the reactor needs to be scrubbed with alcohol, then dried for 4 hours to remove surface impurities, and finally installed in the quartz tube 201a inside the reactor. The gas after the reaction will be passed into the cooling device with the same gas pipe to prevent the high-temperature gas from damaging the experimental equipment, and a liquid collection device is also added behind the cooling device to collect the liquefied gas. Finally, after drying, the gas will be passed into the SF6 detector to detect the degradation efficiency of the entire device.

[0044] The photothermal combined reactor 200 includes at least an air inlet and an air outlet to ensure the internal airflow can circulate. The connecting parts of the cooling device, liquid collection device, drying device and SF6 detector must also be Teflon air pipes to prevent the air pipes from being corroded.

[0045] Example 2

[0046] Reference Figure 1 - Figure 2 , which is the second embodiment of the present invention, provides a device for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel. The device includes a cooling and exhaust assembly 300, including a cooling component 301 and an exhaust component 302. The cooling component 301 is arranged on the heating component 201, and the exhaust component 302 is arranged on the cooling component 301.

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

[0048] Furthermore, the exhaust 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 collector 302c fixedly connected to one side of the concentration detector 302b.

[0049] During operation, the gas cylinder contains H2 and SF6 waste gas, the carrier gas is Ar, and the SF6 waste gas is generally collected in the gas cylinder. During use, the gas in the gas cylinder is discharged through the solenoid valve, and the gas line can be shut off. When using the device, first open the main valve of the carrier gas cylinder, the initial absolute pressure is about 0.1Mpa, and then open the solenoid valve to release the gas, allowing the gas to enter the gas distribution and mixing device. After the gas distribution is completed, the mixed gas is introduced into the photothermal combined reactor 200. In the reaction device, the heating device is composed of a tubular reactor 201b and a quartz tube 201a. The reactor mainly provides the temperature required for the reaction. The gas can react within the temperature range of 100-900°C through the quartz tube 201a in the reactor, and an ultraviolet light source is provided inside the reaction device to provide ultraviolet light irradiation for the reaction. After passing through the photothermal combined reactor 200, the high-temperature gas will be discharged into the cooling device to prevent the high-temperature gas from damaging the experimental equipment. After the cooling is completed, the liquefied gas will also be collected by the liquid device, and the gas will also be discharged into the drying device to dry the remaining gas. After the gas is processed, it will be introduced into the SF6 concentration detector 302b, which can intuitively reflect the degree of SF6 degradation. After the processing is completed, the tail gas will be collected and processed.

[0050] Example 3

[0051] Reference Figure 1 - Figure 2 , which is the third embodiment of the present invention, provides a device and method for degrading sulfur hexafluoride of 304 stainless steel by combining light and heat, including the following contents:

[0052] S1. Each gas cylinder is connected to a gas distribution and mixing device through a solenoid valve. Gas is distributed in the gas distribution and mixing device, and the mixed gas is introduced into the photothermal combined reactor 200 for full reaction;

[0053] S2. After the reaction is completed, the gas after the reaction is passed into the cooling device to prevent the high temperature gas from damaging the experimental equipment. After the cooling is completed, the liquefied gas will be collected by the liquid collection device, and the remaining gas will be dried and then tested for SF6 concentration;

[0054] S3, the treated gas is passed into the tail gas collection device for treatment;

[0055] S4. After the device is finished running, it should be shut down in the order of gas circuit first and then circuit. First close the main valve of the SF6 gas cylinder, and then close the solenoid valve. Wait for a few minutes to allow the reaction device to completely degrade the remaining SF6 mixed gas before turning off the power. Finally, close the valve of the carrier gas to ensure that the carrier gas washes the remaining SF6 gas in the gas pipe and the reaction device.

[0056] After the device is finished running, it should also be closed in the order of gas circuit first and then circuit. Because there is an uncertain reaction device in the middle of the device, only the gas circuit closing situation of the device is described here. First, the main valve of the SF6 gas cylinder should be closed, and then the solenoid valve should be closed. After that, wait for a few minutes and wait for the reaction device to completely degrade the remaining SF6 mixed gas before turning off the power. Note that the gas circuit of the carrier gas should be closed last, because the carrier gas needs to clean the remaining SF6 gas in the gas pipe and the reaction device. Finally, close the valve of the carrier gas, and the closing order is consistent with the SF6 gas circuit.

[0057] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values, mounting arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, improvements, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0058] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0059] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, without undue experimentation, the development effort will be a routine task of design, fabrication, and production.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A device for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel, characterized by: include, A ventilation assembly (100) comprises an air mixing element (101) and a control element (102), wherein the control element (102) is arranged on the air mixing element (101); as well as A degradation component, comprising a heating element (201), an irradiation element (202) and a container element (203), wherein the heating element (201) is arranged on the gas mixing element (101), the irradiation element (202) is arranged on the heating element (201), and the container element (203) is arranged on the heating element (201); and, The cooling exhaust component (300) comprises a cooling component (301) and an exhaust component (302), wherein the cooling component (301) is arranged on the heating component (201), and the exhaust component (302) is arranged on the cooling component (301).

2. The device for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel according to claim 1 is characterized in that: The gas mixing component (101) comprises a first gas cylinder (101a), a second gas cylinder (101b) and a third gas cylinder (101c) arranged in parallel, and a gas distribution and mixing device (101d) fixedly connected to the first gas cylinder (101a), the second gas cylinder (101b) and the third gas cylinder (101c).

3. The device for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel according to claim 2 is characterized in that: The control component (102) comprises 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 distribution and mixing device (101d).

4. The device for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel according to claim 2 or 3, characterized in that: The heating element (201) comprises a quartz tube (201a) fixedly connected to one side of the gas distribution and mixing device (101d), and a tubular reaction furnace (201b) connected to the outside of the quartz tube (201a).

5. The device for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel according to claim 4 is characterized in that: The irradiating element (202) comprises a violet light tube surrounding the tubular reaction furnace (201b).

6. The device for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel according to claim 5 is characterized in that: The container (203) comprises a 304 stainless steel body (203a) fixedly connected to the inner wall of the tubular reaction furnace (201b).

7. The device for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel according to claim 6 is characterized in that: The cooling element (301) comprises a cooling machine (301a) fixedly connected to one side of the tubular reaction furnace (201b), and a liquid collector (301b) fixedly connected to one side of the cooling machine (301a).

8. The device for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel according to claim 7 is characterized in that: The exhaust component (302) comprises 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 collector (302c) fixedly connected to one side of the concentration detector (302b).

9. A device and method for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel, characterized in that: The device for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel as claimed in any one of claims 1 to 8 comprises the following steps: The dilution ratio is controlled by a solenoid valve to configure the mixed gas; Passing the mixed gas 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 device and method for degrading sulfur hexafluoride by combining light and heat with 304 stainless steel according to claim 9, characterized in that: Precise control is achieved through three-way solenoid valves. At the same time, during the gas circulation process, the three-way solenoid valves are adjusted according to the gas pressure conditions of the gas distribution and mixing device to control the amount of SF6 mixed gas added in real time.

Images