Plasma heating furnace

Abstract

The present invention specifically relates to a plasma heating furnace, which specifically includes a furnace body, a plasma generating assembly and a restraining mechanism. Among them, the furnace body has a heating channel for conveying working gas. The plasma generating assembly includes a first electrode rod and a second electrode rod, the first working end of the first electrode rod and the second working end of the second electrode rod are both arranged inside the heating channel, and a discharge distance is maintained between the first working end and the second working end. The restraining mechanism includes an air supply assembly, the air supply assembly includes an air supply member arranged along the circumference of the heating channel, and the air supply member has an air supply port arranged along the extension direction of the heating channel. The number of air supply assemblies is two, and the air supply ports of the air supply members of the two air supply assemblies are relatively arranged at the two ends of the heating channel. The plasma heating furnace of the present invention can not only effectively restrain and control the plasma high-temperature jet, thereby obtaining a plasma jet of the required temperature, but also has a good service life.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal engineering, and in particular relates to a plasma heating furnace. Background Art

[0002] Plasma is the fourth state of matter, and has many unique physical and chemical properties that are different from solid, liquid and gas, such as high temperature and energy density, electrical conductivity and luminescence, active chemical properties and the ability to enhance chemical reactions, and excellent environmental performance. Therefore, plasma technology is widely used in various heat treatment equipment due to its high temperature and high thermal conductivity.

[0003] At present, plasma heating furnace is one of the application equipment of plasma technology. Its essence is to use the positive and negative electrodes of graphite rods to energize and start arcs to generate plasma jets above 8000℃, thereby directly or indirectly heating and calcining (roasting, sintering, gasification, melting, smelting) the materials.

[0004] However, if the high-temperature plasma jet needs to be guided into other furnace bodies to heat materials, the temperature of the plasma jet must be effectively controlled. However, as the distance of the plasma jet increases, the temperature and heat will gradually decay. If the high-temperature plasma jet in the furnace body cannot be effectively restrained, not only will the plasma jet of the required temperature not be obtained, but the high-temperature plasma jet will also scour the inner wall of the furnace body, thereby affecting the service life of the furnace body. Summary of the invention

[0005] The purpose of the present invention is to at least solve the problem that the existing plasma heating furnace cannot effectively constrain and control the plasma high temperature jet, so as to obtain a plasma jet of the required temperature. This purpose is achieved through the following technical solutions:

[0006] A first aspect of the present invention provides a plasma heating furnace, comprising:

[0007] A furnace body having a heating channel for conveying a working gas;

[0008] a plasma generating assembly, the plasma generating assembly comprising a first electrode rod and a second electrode rod arranged at intervals on the furnace body, the first electrode rod having a first working end, the second electrode rod having a second working end, the first working end and the second working end being arranged inside the heating channel, and a discharge distance being able to be maintained between the first working end and the second working end;

[0009] A restraining mechanism, wherein the restraining mechanism comprises an air supply assembly, wherein the air supply assembly comprises an air supply member arranged along the circumference of the heating channel, and the air supply member has an air supply port arranged along the extension direction of the heating channel;

[0010] The number of the air supply components is two, the air supply members of the two air supply components are respectively arranged at two ends of the heating channel, and the air supply ports of the two air supply members are arranged opposite to each other.

[0011] The plasma heating furnace according to the present invention comprises a furnace body, a plasma generating assembly and a restraining mechanism. By arranging a first electrode rod and a second electrode rod on the furnace body and inputting current into the first electrode rod and the second electrode rod, the gas between the first electrode rod and the second electrode rod can be transformed into plasma, and at this time, the gas that becomes plasma can be mixed with the working gas flowing through the heating channel and then output, so as to achieve the purpose of generating high-temperature gas by ionizing the working gas, and the high-temperature gas can be used to replace the high-temperature flue gas generated by the combustion of fossil fuels to provide a heat source for the industrial furnace, so that the plasma heating furnace not only has a good heat conversion efficiency and ensures the heating effect of the high-temperature gas outputted, but also helps to achieve zero emission of carbon dioxide in the entire heating process and reduce pollution to the environment.

[0012] At the same time, by arranging the air supply parts of the two restraining mechanisms relatively on both sides of the heating channel, a high-pressure counter-flow can be formed in the circumferential direction of the heating channel to restrain the working gas mixed with plasma in the center of the heating channel. At this time, the restraining mechanism helps to reduce the heat dissipation of the working gas on the one hand, and at the same time, it can also prevent the inner wall of the furnace body from being eroded by the high-temperature plasma jet, thereby ensuring that the inner wall of the furnace body is not burned and improving the service life and safety of the equipment; on the other hand, the working gas input by the restraining mechanism can play a role in heat conduction, which helps to quickly neutralize the working gas with plasma, so that the required temperature of the working gas can be reached in the shortest time.

[0013] In addition, the plasma heating furnace according to the present invention may also have the following additional technical features:

[0014] In some embodiments of the present invention, there are multiple air supply members, and the multiple air supply members are arranged in layers outward with the heating channel as the center.

[0015] In some embodiments of the present invention, the air supply assembly further comprises:

[0016] An air inlet pipe, wherein the air inlet pipe is arranged on the furnace body, and the number of the air inlet pipes is multiple;

[0017] A connecting pipe is arranged in the furnace body, one end of the connecting pipe is connected to the air inlet pipe, and the other end of the connecting pipe is connected to the air supply member.

[0018] In some embodiments of the present invention, the constraint mechanism further includes an air supply component, and the air supply component includes:

[0019] Fan,

[0020] A conveying main pipe, the conveying main pipe is connected to the fan;

[0021] A delivery branch pipe, wherein the number of the delivery branch pipes is multiple, one end of the delivery branch pipe is connected to the delivery main pipe, and the other end of the delivery branch pipe is connected to the air inlet pipe;

[0022] A control valve is provided on the delivery branch pipe, and the control valve is used to adjust the wind speed output by the delivery branch pipe.

[0023] In some embodiments of the present invention, a detection component is further included, and the detection component includes:

[0024] a first detection member, the first detection member being used to detect the temperature between the first working end and the second working end;

[0025] A second detection member is used to detect the temperature of the working gas output by the heating channel.

[0026] In some embodiments of the present invention, the inner wall of the furnace body is provided with refractory material.

[0027] In some embodiments of the present invention, a coolant inlet and a coolant outlet are provided on the furnace body, a cooling channel is provided between the coolant inlet and the coolant outlet, and the cooling channel is provided inside the refractory material.

[0028] In some embodiments of the present invention, the plasma heating furnace further comprises:

[0029] A delivery mechanism is used to clamp and drive the first electrode rod and / or the second electrode rod to move so as to adjust the discharge distance between the first working end and the second working end.

[0030] In some embodiments of the present invention, the first electrode rod and the second electrode rod are arranged on the furnace body along a first straight line, and the first straight line is perpendicular to the extension direction of the heating channel;

[0031] The number of the delivery mechanisms is two, and the delivery mechanisms include:

[0032] A clamping assembly, the clamping assembly being used to clamp a portion of the first electrode rod located outside the furnace body or a portion of the second electrode rod located outside the furnace body;

[0033] A driving member, wherein the driving member is used to drive the clamping assembly to move along the first straight line.

[0034] In some embodiments of the present invention, two sealing assemblies are provided on the furnace body, the first electrode rod passes through one of the two sealing assemblies, and the second electrode rod passes through the other of the two sealing assemblies, and the sealing assemblies include:

[0035] a first connecting seat, wherein the first connecting seat is arranged on the furnace body, and the first electrode rod or the second electrode rod is passed through the first connecting seat;

[0036] A protective member, the protective member being arranged between an inner wall of the first connecting seat and the first electrode rod or the second electrode rod;

[0037] a second connection seat, the second connection seat is fixedly connected to the first connection seat and sleeved on the first electrode rod or the second electrode rod, and the second connection seat is used to fix the protective member;

[0038] A sealing member is arranged inside the second connecting seat and located between the second connecting seat and the first electrode rod or the second electrode rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0040] Figure 1 It is a structural schematic diagram of a plasma heating furnace shown in an embodiment of the present invention;

[0041] Figure 2 It is a schematic diagram of a local structure of a plasma heating furnace shown in an embodiment of the present invention at a certain viewing angle;

[0042] Figure 3 It is a schematic diagram of a partial structure of a plasma heating furnace shown in an embodiment of the present invention from another perspective;

[0043] Figure 4 It is a schematic diagram of a partial structure of a plasma heating furnace shown in an embodiment of the present invention at a third viewing angle;

[0044] Figure 5 for Figure 2 Partial cross-sectional view along the BB direction;

[0045] Figure 6 for Figure 3 Schematic diagram of the cross section in the CC direction;

[0046] Figure 7 for Figure 6 A partial enlarged schematic diagram of D in the middle;

[0047] Figure 8 for Figure 2 Partial cross-sectional view along the AA direction;

[0048] Fig. 9 A partial structural cross-sectional view (CC direction) of another structure of a plasma heating furnace shown in an embodiment of the present invention;

[0049] Fig.10 A partial structural cross-sectional view (AA direction) of another structure of a plasma heating furnace shown in an embodiment of the present invention;

[0050] Fig.11 It is a partial structural cross-sectional view (CC direction) of the third structure of the plasma heating furnace shown in the embodiment of the present invention.

[0051] The symbols in the accompanying drawings are as follows:

[0052] 1. furnace body; 101. air inlet; 102. air outlet; 103. heating channel;

[0053] 21. a first electrode rod; 22. a second electrode rod;

[0054] 31. first driving member; 32. first clamping assembly; 321. connecting plate; 322. first clamping member; 323. second clamping member; 324. first cylinder; 325. fixing frame; 326. connecting frame; 33. second driving member; 34. second clamping assembly;

[0055] 41. first connecting seat; 411. baffle; 42. protective member; 43. second connecting seat; 431. seat body; 432. support plate; 433. sealing cover; 44. sealing member; 441. sleeve; 442. high temperature resistant skeleton oil seal;

[0056] 51. first detection member; 52. second detection member;

[0057] 61. Air supply part; 62. Connecting pipe; 63. Air inlet pipe;

[0058] 71. Fan; 72. Transport main pipe; 73. Transport branch pipe; 74. Control valve;

[0059] 8. Refractory materials;

[0060] 91. Coolant inlet; 92. Cooling channel; 93. Coolant outlet. DETAILED DESCRIPTION

[0061] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0062] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0063] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0064] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both above and below orientations.

[0065] like Figure 1-Figure 11As shown, according to an embodiment of the present invention, a plasma heating furnace is proposed, which can effectively constrain the plasma high-temperature jet in the furnace body 1 to obtain a plasma jet of a required temperature, and also help reduce the scouring of the inner wall of the furnace body 1 by the plasma high-temperature jet, thereby ensuring the service life of the furnace body 1.

[0066] In terms of overall design, the plasma heating furnace includes a furnace body 1, a plasma generating assembly and a restraining mechanism. Among them, the furnace body 1 has a heating channel 103 for conveying working gas. The plasma generating assembly includes a first electrode rod 21 and a second electrode rod 22 arranged at intervals on the furnace body 1, the first electrode rod 21 has a first working end, the second electrode rod 22 has a second working end, the first working end and the second working end are arranged inside the heating channel 103, and the discharge distance between the first working end and the second working end can be maintained. The restraining mechanism includes an air supply assembly, and the air supply assembly includes an air supply member 61 arranged along the circumference of the heating channel 103, and the air supply member 61 has an air supply port arranged along the extension direction of the heating channel 103. There are two air supply assemblies, and the air supply members 61 of the two air supply assemblies are respectively arranged at the two ends of the heating channel 103, and the air supply ports of the two air supply members 61 are arranged opposite to each other.

[0067] According to the plasma heating furnace of the present invention, by arranging the first electrode rod 21 and the second electrode rod 22 on the furnace body 1 and inputting current into the first electrode rod 21 and the second electrode rod 22, the gas between the first electrode rod 21 and the second electrode rod 22 can be converted into plasma. At this time, the gas that becomes plasma can be mixed with the working gas flowing through the heating channel 103 and then output, thereby achieving the purpose of generating high-temperature gas by ionizing the working gas. The high-temperature gas can be used to replace the high-temperature flue gas generated by the combustion of fossil fuels, provide a heat source for the industrial furnace, help achieve zero emission of carbon dioxide in the entire heating process, reduce pollution to the environment, and the plasma heating furnace also has good thermal conversion efficiency, thereby improving resource utilization.

[0068] At the same time, by relatively arranging the air supply parts 61 of the two restraining mechanisms on both sides of the heating channel 103, a high-pressure counter-flow can be formed in the circumferential direction of the heating channel 103 to restrain the working gas mixed with plasma at the center of the heating channel 103. At this time, the restraining mechanism helps to reduce the heat dissipation of the working gas on the one hand, and at the same time, it can also prevent the inner wall of the furnace body 1 from being eroded by the high-temperature plasma jet, thereby ensuring that the inner wall of the furnace body 1 is not burned, and improving the service life and safety of the equipment; on the other hand, the working gas input by the restraining mechanism can play a role in heat conduction, which helps to quickly neutralize the working gas with plasma, so that the required temperature of the working gas output by the plasma heating furnace can be reached in the shortest time.

[0069] Specifically, if Figure 1-Figure 4As shown, the furnace body 1 can be arranged on a mounting base, which can be the ground or a mounting plate. In this embodiment, the furnace body 1 is arranged on the ground. Figure 6 As shown, the furnace body 1 has an air inlet 101 and an air outlet 102, and a heating channel 103 is provided between the air inlet 101 and the air outlet 102. The air inlet 101 is used to input working gas with a certain speed, and the working gas can flow through the air inlet 101, the heating channel 103 and the air outlet 102 in sequence. As a preferred embodiment, the heating channel 103 is extended in the horizontal direction.

[0070] It should be understood that the furnace body 1 can be made of carbon steel, low alloy steel or high alloy steel, and the specific material selection of the furnace body 1 can be determined by the heating temperature required to be achieved by the plasma heating furnace, which will not be described in detail here.

[0071] Here, it should be noted that the working gas can be set to air, or it can be set to one or a mixed gas of nitrogen, carbon dioxide and inert gas, so as to ensure that the working gas meets the set temperature after mixing with the plasma working gas, and the set temperature range is 80℃~500℃.

[0072] At this time, the first electrode rod 21 and the second electrode rod 22 are both installed on the furnace body 1, and the first electrode rod 21 and the second electrode rod 22 are arranged opposite to each other along the first straight line. In this embodiment, the first straight line is a vertical line, and at this time, the first straight line is perpendicular to the extension direction of the heating channel 103. Figure 6 As shown, the first electrode rod 21 is arranged at the top of the furnace body 1, and the second electrode rod 22 is arranged at the bottom of the furnace body 1, wherein the first electrode rod 21 has a first working end and a first connecting end, and the second electrode rod 22 has a second working end and a second connecting end, and the first working end and the second working end are arranged inside the heating channel 103, and a discharge distance can be maintained between the first working end and the second working end.

[0073] It should be understood that the plasma generating assembly further includes a current supply member, which has a positive electrode and a negative electrode respectively connected to the first electrode rod 21 and the second electrode rod 22, and the current supply member is not shown in the figure. In this embodiment, the current supply member is used to output direct current, and the positive electrode and the negative electrode of the current supply member are respectively connected to the first connection end of the first electrode rod 21 and the second connection end of the second electrode rod 22. The current supply member outputs direct current to the first electrode rod 21 and the second electrode rod 22, and by adjusting the magnitude of the input current, in conjunction with the following delivery mechanism to regulate the discharge distance, the control effect of the temperature between the first working end and the second working end can be further improved, thereby ensuring the accuracy of the output temperature of the plasma heating furnace.

[0074] like Figure 1 , Figure 2 and Figure 4 As shown, the plasma heating furnace also includes a delivery mechanism, which is used to clamp and drive the first electrode rod 21 and / or the second electrode rod 22 to move, so as to adjust the discharge distance between the first working end and the second working end. The plasma heating furnace of the present application can achieve adjustable discharge distance between the first working end and the second working end, and continuous delivery of the first electrode rod 21 and the second electrode rod 22 by setting a delivery mechanism to clamp the first electrode rod 21 and / or the second electrode rod 22, and by driving the first electrode rod 21 and / or the second electrode rod 22 to move, which helps to improve the applicability of the plasma gas heating furnace and enable it to be applied to a variety of heating fields.

[0075] In this embodiment, there are two delivery mechanisms, and the two delivery mechanisms have the same structure. For ease of description, the two delivery mechanisms are respectively referred to as the first delivery mechanism and the second delivery mechanism. The first delivery mechanism is taken as an example for description below. Figure 4 As shown, the first delivery mechanism includes a first clamping assembly 32 and a first driving member 31, and correspondingly, the first delivery mechanism includes a second driving member 33 and a second clamping assembly 34. The first clamping assembly 32 is used to clamp the portion of the first electrode rod 21 outside the furnace body 1, and the second clamping assembly 34 is used to clamp the portion of the second electrode rod 22 outside the furnace body 1. In this embodiment, the first driving member 31 is configured as a hydraulic cylinder. Preferably, the first driving member 31 and the second driving member 33 are configured to be started or closed synchronously, so that the first electrode rod 21 and the second electrode rod 22 can move toward each other or move away from each other, which can further improve the control effect of the discharge distance between the first electrode rod 21 and the second electrode rod 22, thereby helping to improve the control accuracy of the plasma heating furnace.

[0076] Combination Figure 5 As shown, the first clamping assembly 32 includes a connecting plate 321, a first clamping member 322 and a second clamping member 323, wherein the connecting plate 321 is fixedly arranged at the power output end of the first driving member 31. The first clamping member 322 is arranged on the connecting plate 321, and the second clamping member 323 is movably arranged on the connecting plate 321. The second clamping member 323 is arranged to be movable, so that the second clamping member 323 can cooperate with the first clamping member 322 to achieve clamping and loosening of the first electrode rod 21.

[0077] Specifically, the connecting plate 321 is fixedly connected to the power output end of the first driving member 31 by bolts, a fixing frame 325 is connected to the first connecting plate 321 by bolts, and a first clamping member 322 and a first cylinder 324 are installed on the fixing frame 325, wherein the output end of the first cylinder 324 is fixedly connected to the second clamping member 323 by a connecting frame 326, and at this time, a return spring is arranged between the fixing frame 325 and the connecting frame 326 to cooperate with the first cylinder 324 to ensure the clamping effect of the first clamping assembly 32 on the second clamping member 323. By arranging the first cylinder 324 to drive the second clamping member 323 to move, the distance between the first clamping member 322 and the second clamping member 323 can be adjusted, thereby facilitating the clamping and fixing of the first electrode rod 21 by the first clamping assembly 32, and ensuring that the first electrode rod 21 will not move during actual use.

[0078] like Figure 4 , Figure 6 and Figure 7 As shown, two sealing components are provided on the furnace body 1, the first electrode rod 21 passes through one of the two sealing components, and the second electrode rod 22 passes through the other of the two sealing components. In this embodiment, the two sealing components are respectively provided at the top and bottom of the furnace body 1. By providing the sealing components on the furnace body 1, the airflow in the heating channel 103 can be effectively prevented from escaping, the loss of high-temperature gas can be reduced, the heat conversion rate of the plasma heating furnace can be guaranteed, and at the same time, external substances can be prevented from entering the furnace body 1, thereby improving the safety of the furnace body 1 when in use.

[0079] At this time, for the convenience of description, the sealing assembly located at the top of the furnace body 1 is taken as an example for description. Figure 7 As shown, the sealing assembly includes a first connection seat 41, a protective member 42, a second connection seat 43 and a sealing member 44. The first connection seat 41 is arranged on the furnace body 1, and the first electrode rod 21 passes through the first connection seat 41. Preferably, a baffle 411 is arranged on the first connection seat 41, and the protective member 42 is arranged inside the first connection seat 41 and abuts against the baffle 411 at one end, and at this time, the second connection seat 43 is fixedly connected to the first connection seat 41 and abuts against the other end of the protective member 42 to fix the protective member 42 inside the first connection seat 41. In this embodiment, the protective member 42 is an electrode insulating sleeve, which helps to prevent direct current from flowing to the furnace body 1 through the first electrode rod 21, thereby improving the safety of the furnace body 1 when in use.

[0080] Still Figure 7As shown, the second connection seat 43 is sleeved on the first electrode rod 21. Specifically, the second connection seat 43 includes a seat body 431 and a sealing cover 433. The seat body 431 is used to be fixedly connected to the first connection seat 41, and the first end of the seat body 431 is in contact with the protective member 42, and the second end of the seat body 431 is provided with a sealing cover 433. At the same time, a support plate 432 is provided inside the seat body 431. The sealing member 44 is clamped between the sealing cover 433 and the support plate 432, and is in contact with the peripheral surface of the first electrode rod 21. In this embodiment, the sealing member 44 includes a plurality of sleeves 441 and high-temperature resistant skeleton oil seals 442 of different lengths, and a high-temperature resistant skeleton oil seal 442 is provided between two adjacent sleeves 441. Such a configuration helps to improve the sealing effect of the sealing assembly, reduce the loss of gas, and ensure that the penetration and movement of the first electrode rod 21 are feasible.

[0081] like Figure 6 As shown, the above-mentioned constraint mechanism includes an air supply assembly and an air supply assembly. Among them, the air supply assembly includes an air inlet pipe 63, a connecting pipe 62 and an air supply member 61. There are multiple air inlet pipes 63 and they are all arranged on the furnace body 1. The connecting pipe 62 is arranged inside the furnace body 1. One end of the connecting pipe 62 is connected to an air inlet pipe 63, and the other end of the connecting pipe 62 is connected to the air supply member 61. The air supply member 61 is arranged along the circumference of the heating channel 103, and the air supply member 61 has an air supply port arranged along the extension direction of the heating channel 103. By setting the air supply assembly, the working gas can be transported to the heating channel 103, so that it can be further mixed with the working gas mixed with plasma in the heating channel 103, so as to reach the required temperature of the output gas of the plasma heating furnace in the shortest time. As a preferred embodiment, the air supply port of the air supply member 61 is parallel to the extension direction of the conveying pipeline, that is, the air supply port of the air supply member 61 is oriented in the horizontal direction.

[0082] It should be understood that the plasma heating furnace has two air supply components, and the air supply parts 61 of the two air supply components are respectively arranged at the two ends of the heating channel 103, and the air supply ports of the two air supply parts 61 are arranged relatively. Since the air supply parts 61 are arranged along the circumference of the heating channel 103, when the two air supply components supply air at the same time, high-pressure counter-airflow can be formed in the circumference of the heating channel 103, which helps to confine the working gas mixed with plasma to the center position of the heating channel 103. At this time, the restraint mechanism can not only prevent the inner wall of the furnace body 1 from being eroded by the high-temperature plasma jet, ensure that the inner wall of the furnace body 1 is not burned, and improve the service life and safety of the equipment, but also can quickly neutralize the working gas with plasma through the input working gas, so as to reach the required temperature of the working gas output by the plasma heating furnace in the shortest time.

[0083] like Figure 6 and Figure 8As shown, the number of air inlet pipes 63 is six, and correspondingly, the number of connecting pipes 62 is six. The provision of six air inlet pipes 63 helps to ensure the stability of the wind pressure in the air supply member 61, so that the working gas output by the air supply member has the same wind pressure or wind speed. In this embodiment, the air supply member 61 is an integrated structure, and one side of the air supply member 61 is opened in the horizontal direction. Such a configuration helps to further improve the restraining effect of the air supply member 61 on the working gas mixed with plasma.

[0084] Here, it should be noted that in addition to being set as an integrated structure, the air supply member 61 can also be set as a split structure. For example, the air supply member 61 is divided into six air supply pipes, and the six air supply pipes are arranged at circumferential intervals along the heating channel 103. Each air supply pipe is connected to an air inlet pipe 63 through a connecting pipe 62, which can also achieve the confinement of the working gas mixed with plasma. Of course, the air supply member 61 with an integrated structure has the best effect.

[0085] It should be further understood that the number of air supply members 61 can also be set to multiple, and the multiple air supply members 61 are layered and arranged outward from the heating channel 103 as the center, so as to be able to perform multi-layer confinement on the gas in the heating channel 103, thereby helping to further improve the confinement effect on the target gas. Fig. 9 and Fig.10 As shown, in this embodiment, three air supply members 61 are provided, and the three air supply members 61 extend outwardly with the heating channel 103 as the center and are arranged at intervals, so as to realize multi-layer confinement of the gas in the heating channel 103. Providing a plurality of air supply members 61 helps to further improve the confinement effect of the confinement mechanism on the working gas mixed with plasma, and the neutralization control effect of the confinement mechanism on the gas in the heating channel 103.

[0086] Of course, if Fig.11 As shown, the three air supply components 61 can also be configured as split structures, that is, each air supply component 61 is provided with multiple air supply pipes. Such a configuration helps to reduce the processing cost of the air supply component and improve the assembly efficiency of the air supply component.

[0087] At this time, the air supply component includes a fan 71, a main delivery pipe 72, a delivery branch pipe 73 and a control valve 74. Among them, the working gas output by the fan 71 flows through the main delivery pipe 72 and the delivery branch pipe 73 in sequence, and finally flows to the air inlet pipe 63 of the air supply component. In this embodiment, there are multiple delivery branch pipes 73, and one end of the delivery branch pipe 73 is connected to the main delivery pipe 72, and the other end of the delivery branch pipe 73 is connected to an air inlet. By arranging a control valve 74 on the delivery branch pipe 73, the wind speed input into the air inlet pipe 63 can be controlled, and then the wind speed output by the air supply component 61 can be controlled. Specifically, the wind speed in the air inlet pipe 63 can be adjusted by adjusting the opening and closing degree of the control valve 74.

[0088] It is necessary to further understand that Fig.11 When there are three air supply members 61, and each air supply member 61 is connected to a plurality of air inlets 101 separately, and the air inlets 101 are connected to the main delivery pipe 72 through the delivery branch pipe 73, and at this time, by adjusting the opening of the control valve 74 on the delivery branch pipe 73, at most three constraint channels can be formed in the circumferential direction of the delivery pipe, and the wind pressure and wind speed of each constraint channel are different, which helps to further improve the use effect of the plasma heating furnace.

[0089] Here, it should be noted that the working gas inputted into the furnace body 1 by the restraining mechanism and the working gas inputted into the furnace body 1 by the air inlet assembly are the same type of gas.

[0090] like Figure 6 , Figure 8 , Fig. 9 and Fig.10 , a refractory material 8 is arranged on the inner wall of the furnace body 1, which helps to protect the inner wall of the furnace body 1 and prevent the high-temperature and high-speed target gas from burning the furnace body 1 due to excessive temperature. At the same time, it can also ensure that the heat in the furnace is not lost, thereby improving the utilization efficiency. In this embodiment, the refractory material 8 is arranged inside the furnace body 1 by masonry. As a preferred embodiment, the refractory material 8 is a high-temperature resistant material or a composite of multiple high-temperature resistant materials. Specifically, the refractory material 8 is set as a graphite refractory material or a corundum brick, a high-alumina brick refractory material. It should be noted that by setting the refractory material 8, it is possible to cooperate with the constraint mechanism to further prevent the inner wall of the furnace body 1 from being eroded by the high-temperature gas, which helps to ensure that the inner wall of the furnace body 1 is not burned, thereby improving the service life and safety of the equipment.

[0091] like Figure 1-Figure 3 As shown, the plasma heating furnace further includes a detection component, which includes a first detection member 51, wherein the first detection member 51 is used to detect the temperature of the output end of the heating channel 103. In this embodiment, the first detection member 51 is configured as a thermometer or a temperature sensor, and is disposed at one end of the furnace body 1 close to the gas outlet 102 to detect the temperature of the output end of the heating channel 103, that is, the gas temperature at the gas outlet 102. By arranging the first detection member 51 on the furnace body 1, the temperature of the working gas output by the plasma heating furnace can be regulated in cooperation with the above-mentioned constraint mechanism.

[0092] It should be further understood that the detection assembly further includes a second detection member 52, wherein the second detection member 52 is used to detect the temperature between the first working end and the second working end. In this embodiment, the second detection member 52 is configured as a thermometer. The thermometer is disposed on the furnace body 1 and is located on the side of the first working end and / or the second working end close to the gas outlet 102. By providing the second detection member 52, the temperature change of the working gas in the heating channel 103 under the action of the constraint mechanism can be determined in cooperation with the first detection member 51, thereby helping to further improve the control accuracy of the temperature of the output gas.

[0093] At this time, the cooling assembly includes a coolant inlet 91 and a coolant outlet 93 opened on the furnace body 1, and a cooling channel 92 is arranged between the coolant inlet 91 and the coolant outlet 93. The cooling channel 92 is arranged inside the refractory material 8. Preferably, the cooling channel 92 is spirally arranged in a spiral structure and is arranged around the heating channel 103 as the center. It is helpful to cool down the heat conducted from the inner wall of the refractory material 8, thereby preventing the temperature of the outer shell of the furnace body 1 from exceeding the standard, playing a role of cooling protection, and cooperating with the refractory material 8 and the restraint mechanism, which can further improve the protection effect of the furnace body 1. In this embodiment, the material of the cooling channel 92 can be selected from a copper tube or a stainless steel tube, or an S stainless steel tube to enhance the thermal conductivity and service life of the cooling channel 92, and it is not easy to produce rust.

[0094] It should be further understood that the plasma heating furnace also includes a controller, which is electrically connected to the first detection member 51 and the second detection member 52 of the detection assembly, and the controller is also electrically connected to the first driving member 31, the second driving member 33, the first cylinder 324 of the first clamping assembly 32, the second cylinder of the second clamping assembly 34, and the fan 71 of the constraint mechanism. The plasma heating furnace can achieve precise control of the output working gas of the plasma heating furnace by adjusting the wind pressure output by the air supply member 61 and the discharge distance between the first working end and the second working end through the linkage control of the controller, so as to ensure that the output working gas reaches the required temperature and help improve the thermal conversion efficiency of the plasma heating furnace. Preferably, the controller is electrically connected to the current supply member, and cooperates with the delivery mechanism to adjust the discharge distance between the first working end and the second working end, so as to further improve the control effect of the working gas output by the plasma heating furnace.

[0095] The plasma heating furnace of the present application, by supplying direct current to the first electrode rod 21 and the second electrode rod 22, can convert the gas between the first electrode rod 21 and the second electrode rod 22 into plasma, and mix it with the working gas input from the air inlet 101 to generate high-temperature working gas, and finally output it from the air outlet 102, which helps to replace the high-temperature flue gas generated by the combustion of fossil fuels with the high-temperature medium gas generated by ionizing the working gas, provides the heat source required for production for industrial kilns, and helps to eliminate environmental pollution caused by fuel problems. As a heat source for industrial kilns, the heat source supply device of the present application reduces the demand for fossil fuels, thereby reducing carbon emissions at the source, which is of significant significance to achieving the goal of carbon neutrality in the industrial production process.

[0096] At the same time, the present application helps to improve the production efficiency of the target gas and ensure the thermal conversion efficiency of the plasma heating furnace by setting a constraint mechanism and a sealing component, so that compared with the prior art, the thermal conversion efficiency of the heat source supply device can reach 75% to 80%, thereby accelerating the heating speed, shortening the production process, and improving production efficiency. Moreover, the setting of the constraint mechanism can cooperate with the refractory material 8 to prevent the inner wall of the furnace body 1 from being eroded by the high-temperature gas, which helps to ensure that the inner wall of the furnace body 1 is not burned, and improves the service life and safety of the equipment. In addition, the working gas output by the constraint mechanism can play a role in heat conduction and neutralization of the working gas, thereby improving the precise control of the plasma heating furnace.

[0097] In addition, the heat source supply device of the present application can increase the existing 2MW to more than 30MW, and the temperature of the working gas outputted by it can be adjusted from 500 to 3000 degrees (and can be increased to a higher temperature required for industrial production). Therefore, the heat source supply device has the characteristics of high power and high heating temperature. At the same time, the heat source supply device can adjust the temperature and flow of the high-temperature gas in real time, so as to provide part or all of the heat source for the industrial kiln to meet the process and production requirements of the industrial kiln, and the heat source supply device can achieve continuous and stable operation, such as the first electrode rod 21 and the second electrode rod 22 can be used continuously for up to 20,000-30,000 hours (can work continuously for more than 3 years). In addition, the gas source selection range of the working gas is wide (oxidizing or reducing gas, and one or more of inert gas).

[0098] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A plasma heating furnace, characterized in that: include: A furnace body having a heating channel for conveying a working gas; a plasma generating assembly, the plasma generating assembly comprising a first electrode rod and a second electrode rod arranged at intervals on the furnace body, the first electrode rod having a first working end, the second electrode rod having a second working end, the first working end and the second working end being arranged inside the heating channel, and a discharge distance being able to be maintained between the first working end and the second working end; A restraining mechanism, wherein the restraining mechanism comprises an air supply assembly, wherein the air supply assembly comprises an air supply member arranged along the circumference of the heating channel, and the air supply member has an air supply port arranged along the extension direction of the heating channel; The number of the air supply components is two, the air supply members of the two air supply components are respectively arranged at two ends of the heating channel, and the air supply ports of the two air supply members are arranged opposite to each other.

2. The plasma heating furnace according to claim 1, characterized in that: There are multiple air supply members, and the multiple air supply members are arranged in layers outward with the heating channel as the center.

3. The plasma heating furnace according to claim 2, characterized in that: The air supply assembly also includes: An air inlet pipe, wherein the air inlet pipe is arranged on the furnace body, and the number of the air inlet pipes is multiple; A connecting pipe is arranged in the furnace body, one end of the connecting pipe is connected to the air inlet pipe, and the other end of the connecting pipe is connected to the air supply member.

4. The plasma heating furnace according to claim 3, characterized in that: The restraint mechanism also includes an air supply component, and the air supply component includes: Fan, A conveying main pipe, the conveying main pipe is connected to the fan; A delivery branch pipe, wherein the number of the delivery branch pipes is multiple, one end of the delivery branch pipe is connected to the delivery main pipe, and the other end of the delivery branch pipe is connected to the air inlet pipe; A control valve is provided on the delivery branch pipe, and the control valve is used to adjust the wind speed output by the delivery branch pipe.

5. The plasma heating furnace according to claim 1, characterized in that: Also included is a detection component, the detection component comprising: a first detection member, the first detection member being used to detect the temperature between the first working end and the second working end; A second detection member is used to detect the temperature of the working gas output by the heating channel.

6. The plasma heating furnace according to claim 1, characterized in that: The inner wall of the furnace body is provided with refractory material.

7. The plasma heating furnace according to claim 6, characterized in that: A coolant inlet and a coolant outlet are provided on the furnace body, a cooling channel is provided between the coolant inlet and the coolant outlet, and the cooling channel is provided inside the refractory material.

8. The plasma heating furnace according to any one of claims 1 to 7, characterized in that: The plasma heating furnace also includes: A delivery mechanism is used to clamp and drive the first electrode rod and / or the second electrode rod to move so as to adjust the discharge distance between the first working end and the second working end.

9. The plasma heating furnace according to claim 8, characterized in that: The first electrode rod and the second electrode rod are arranged on the furnace body along a first straight line, and the first straight line is perpendicular to the extension direction of the heating channel; The number of the delivery mechanisms is two, and the delivery mechanisms include: A clamping assembly, the clamping assembly being used to clamp a portion of the first electrode rod located outside the furnace body or a portion of the second electrode rod located outside the furnace body; A driving member, wherein the driving member is used to drive the clamping assembly to move along the first straight line.

10. The plasma heating furnace according to claim 9, characterized in that: The furnace body is provided with two sealing assemblies, the first electrode rod passes through one of the two sealing assemblies, and the second electrode rod passes through the other of the two sealing assemblies, and the sealing assemblies include: a first connecting seat, wherein the first connecting seat is arranged on the furnace body, and the first electrode rod or the second electrode rod is passed through the first connecting seat; A protective member, the protective member being arranged between an inner wall of the first connecting seat and the first electrode rod or the second electrode rod; a second connection seat, the second connection seat is fixedly connected to the first connection seat and sleeved on the first electrode rod or the second electrode rod, and the second connection seat is used to fix the protective member; A sealing member is arranged inside the second connecting seat and located between the second connecting seat and the first electrode rod or the second electrode rod.

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