Plasma heating furnace

Abstract

The utility model particularly relates to a plasma heating furnace. The plasma heating furnace specifically comprises a furnace body, a plasma generating device and a delivery mechanism, the furnace body is provided with a heating channel for conveying working gas. The plasma generating device comprises a first electrode bar and a second electrode bar, a first working end of the first electrode bar and a second working end of the second electrode bar are arranged in the heating channel, and a discharge distance can be kept between the first working end and the second working end. The delivery mechanism is used for clamping and driving the first electrode bar and / or the second electrode bar to move. According to the plasma heating furnace, the delivery mechanism is arranged to clamp and drive the first electrode bar and / or the second electrode bar to move, continuous delivery of the first electrode bar and / or the second electrode bar can be achieved, and the problems that a graphite electrode in an existing plasma heating furnace is short in service life and cannot be fully utilized are solved. And the temperature of the output working gas can be adjusted, and the applicability of the plasma heating furnace can be improved.

Description

Technical Field

[0001] The utility model 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 generate a plasma jet of more than 8000℃, so as to directly or indirectly heat and calcine (roasting, sintering, gasification, melting, smelting) the material.

[0004] However, the existing graphite electrode rods are usually set inside the plasma heating furnace, and generally no more than 2 months, the graphite electrode rods cannot meet the use requirements of the equipment. At this time, it is necessary to stop the machine to replace the graphite electrode rods, and the shutdown requires waiting for the furnace body to cool down and clean up, which takes a long time and affects production efficiency. If the graphite rods are replaced during the production process, it is easy to cause gas leakage, high concentration of CO2 or toxic gases will pollute the environment, and seriously cause personal injury to the staff. At the same time, the replaced graphite electrode rods are not completely consumed and cannot be reused. Utility Model Content

[0005] The purpose of the utility model is to at least solve the problem that the graphite electrodes in the existing plasma heating furnace have a short service life and cannot be fully utilized. This purpose is achieved through the following technical solutions:

[0006] The utility model proposes a plasma heating furnace, comprising:

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

[0008] A plasma generating device, the plasma generating device comprising an electrode assembly, the electrode assembly comprising a first electrode rod and a second electrode rod, the first electrode rod and the second electrode rod are both arranged on the furnace body along a first straight line, the first straight line is perpendicular to the extension direction of the heating channel; a first working end of the first electrode rod and a second working end of the second electrode rod are both arranged inside the heating channel, and a discharge distance can be maintained between the first working end and the second working end;

[0009] A delivery mechanism is used to clamp and drive the first electrode rod and / or the second electrode rod to move.

[0010] According to the utility model, the plasma heating furnace includes a furnace body, a plasma generating device and a delivery mechanism. By arranging the first electrode rod and the second electrode rod on the furnace body and inputting direct current into the first electrode rod and the second electrode rod, the working gas between the first electrode rod and the second electrode rod can be transformed into a plasma state, and at this time, the working gas in the plasma state has a high temperature characteristic and can flow out from the output end of the heating channel. By setting a delivery mechanism to clamp and drive the first electrode rod and / or the second electrode rod to move, the continuous delivery of the first electrode rod and / or the second electrode rod can be achieved, which helps to solve the problem that the graphite electrode in the existing plasma heating furnace has a short service life and cannot be fully utilized. At the same time, the delivery mechanism drives the first electrode rod and / or the second electrode rod to move, which can achieve an adjustable discharge distance between the first working end and the second working end, and then can achieve an adjustable temperature of the working gas output from the heating channel, which helps to improve the applicability of the plasma gas heating furnace and enable it to be applied to a variety of heating fields.

[0011] In addition, the plasma heating furnace of the utility model achieves the purpose of generating high-temperature gas by ionizing the working gas, and the working gas outputted by the utility model can be used to replace the high-temperature flue gas generated by the combustion of fossil fuels, providing a heat source for the industrial furnace, which helps to achieve zero carbon dioxide emissions during the entire heating process and reduce pollution to the environment. Moreover, the plasma heating furnace also has good thermal conversion efficiency and improves resource utilization.

[0012] In addition, the plasma heating furnace according to the utility model may also have the following additional technical features:

[0013] In some embodiments of the utility model, the number of the delivery mechanisms is two, one of the two delivery mechanisms is used to clamp the portion of the first electrode rod located outside the furnace body, and the other of the two delivery mechanisms is used to clamp the portion of the second electrode rod located outside the furnace body, and the two delivery mechanisms are used to drive the first electrode rod and the second electrode rod to move synchronously.

[0014] In some embodiments of the present invention, the delivery mechanism comprises:

[0015] A clamping assembly, the clamping assembly being used to clamp the first electrode rod and / or the second electrode rod at a portion outside the furnace body;

[0016] A driving member, wherein the driving member is used to drive the clamping assembly to move along the first straight line.

[0017] In some embodiments of the present invention, the clamping assembly comprises:

[0018] A connecting plate, the connecting plate being fixedly arranged at the power output end of the driving member;

[0019] a first clamping member, the first clamping member being arranged on the connecting plate;

[0020] A second clamping member is movably disposed on the connecting plate.

[0021] In some embodiments of the present invention, the plasma heating furnace further comprises:

[0022] A first detection member is used to detect the temperature of the working gas at the output end of the heating channel.

[0023] In some embodiments of the present invention, it also includes:

[0024] A controller is electrically connected to the first detection member, and is used to control the start or stop of the driving member.

[0025] In some embodiments of the utility model, two sealing assemblies are arranged 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:

[0026] 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;

[0027] 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;

[0028] 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;

[0029] 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.

[0030] In some embodiments of the present invention, the first electrode rod and / or the second electrode rod is configured as a plurality of electrode units, and two adjacent electrode units are connected by threads.

[0031] In some embodiments of the present invention, the plasma generating device further comprises:

[0032] A current supply component has a positive electrode and a negative electrode respectively connected to the first electrode rod and the second electrode rod, and the current supply component is used to output direct current.

[0033] In some embodiments of the present invention, there are multiple electrode assemblies, and the multiple electrode assemblies are arranged on the furnace body at intervals. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment 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:

[0035] Figure 1 It is a structural schematic diagram of a plasma heating furnace shown in an embodiment of the utility model;

[0036] Figure 2 It is a schematic structural diagram of a plasma heating furnace shown in an embodiment of the utility model from another perspective;

[0037] Figure 3 It is a schematic structural diagram of a plasma heating furnace shown in an embodiment of the utility model at a third viewing angle;

[0038] Figure 4 for Figure 2 Partial cross-sectional view in the CC direction;

[0039] Figure 5 Another structural schematic diagram of a plasma heating furnace shown in an embodiment of the utility model;

[0040] Figure 6 for Figure 1 A schematic cross-sectional view of a certain part in the middle BB direction;

[0041] Figure 7 for Figure 1 Partial cross-sectional view along the AA direction;

[0042] Figure 8 for Figure 4 A schematic diagram of the structure of the sealing assembly;

[0043] Fig. 9 for Figure 1 A schematic cross-sectional view of another part in the middle BB direction;

[0044] Fig.10 It is a schematic diagram of a control system of a plasma heating furnace shown in an embodiment of the present utility model.

[0045] The symbols in the accompanying drawings are as follows:

[0046] 1. Furnace body; 11. Air inlet; 12. Air outlet; 13. Heating channel; 14. Installation platform;

[0047] 21. a first electrode rod; 22. a second electrode rod;

[0048] 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; 327. return spring; 33. second driving member; 34. second clamping assembly;

[0049] 4. Sealing assembly; 41. First connecting seat; 411. Baffle; 42. Protective member; 43. Second connecting seat; 431. Sealing body; 432. Support plate; 433. Sealing cover; 434. Cooling jacket; 44. Sealing member; 441. Direction sleeve; 442. High temperature resistant skeleton oil seal; 45. Connecting member;

[0050] 51. First detection member; 52. Second detection member; 53. Third detection member;

[0051] 61. Air supply part; 62. Connecting pipe; 63. Air inlet pipe;

[0052] 7. Refractory materials;

[0053] 81. Coolant inlet; 82. Cooling channel; 83. Coolant outlet. DETAILED DESCRIPTION

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] like Figure 1-Figure 4 As shown, according to the implementation mode of the utility model, a plasma heating furnace is proposed to solve the problem that the graphite electrodes of the existing plasma heating furnaces have a short service life and cannot be fully utilized.

[0059] In terms of overall design, the plasma heating furnace includes a furnace body 1, a plasma generating device and a delivery mechanism. Among them, the furnace body 1 has a heating channel 13 for conveying working gas. The plasma generating device includes a first electrode rod 21 and a second electrode rod 22, and the first electrode rod 21 and the second electrode rod 22 are both arranged on the furnace body 1 along a first straight line, and the first straight line is perpendicular to the extension direction of the heating channel 13; the first working end of the first electrode rod 21 and the second working end of the second electrode rod 22 are both arranged inside the heating channel 13, and the discharge distance can be maintained between the first working end and the second working end. The delivery mechanism is used to clamp and drive the first electrode rod 21 and / or the second electrode rod 22 to move.

[0060] The plasma heating furnace of the utility model can make the working gas between the first electrode rod 21 and the second electrode rod 22 change into a plasma state 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. At this time, the working gas in the plasma state has a high temperature characteristic and can flow out from the output end of the heating channel 13. By arranging a delivery mechanism to clamp and drive the first electrode rod 21 and / or the second electrode rod 22 to move, the first electrode rod 21 and / or the second electrode rod 22 can be continuously delivered, which helps to solve the problem that the graphite electrode in the existing plasma heating furnace has a short service life and cannot be fully utilized. At the same time, the delivery mechanism drives the first electrode rod 21 and / or the second electrode rod 22 to move, which can realize the adjustable discharge distance between the first working end and the second working end, and then realize the adjustable temperature of the working gas output from the heating channel 13, which helps to improve the applicability of the plasma gas heating furnace and enable it to be applied to various heating fields.

[0061] In addition, the plasma heating furnace of the utility model achieves the purpose of generating high-temperature gas by ionizing the working gas, and the working gas outputted by the utility model can be used to replace the high-temperature flue gas generated by the combustion of fossil fuels, providing a heat source for the industrial furnace, which helps to achieve zero carbon dioxide emissions during the entire heating process and reduce pollution to the environment. Moreover, the plasma heating furnace also has good thermal conversion efficiency and improves resource utilization.

[0062] Specifically, if Figure 1-Figure 3 As 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 4 As shown, the furnace body 1 has an air inlet 11 and an air outlet 12, and a heating channel 13 is provided between the air inlet 11 and the air outlet 12. The air inlet 11 is used to input working gas with a certain speed, and the working gas can flow through the air inlet 11, the heating channel 13 and the air outlet 12 in sequence. As a preferred embodiment, the heating channel 13 is extended in the horizontal direction.

[0063] 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.

[0064] Here, it should be noted that in addition to being set to air, the working gas can also be set to one or a mixed gas of nitrogen, carbon dioxide and inert gas to ensure that the working gas meets the set temperature after mixing with the plasma working gas. The set temperature range is 80°C to 500°C.

[0065] like Figure 1 and Figure 3 As shown, the plasma generating assembly includes a first electrode rod 21 and a second electrode rod 22 which are arranged at intervals on the furnace body 1. Specifically, the first electrode rod 21 and the second electrode rod 22 are both arranged on the furnace body 1, and the first electrode rod 21 and the second electrode rod 22 are located on a first straight line. In this embodiment, the first straight line is a vertical line and is perpendicular to the extension direction of the heating channel 13, that is, the first straight line is perpendicular to the horizontal direction. Such an arrangement helps to reduce the influence of the first electrode rod 21 and the second electrode rod 22 on the flow velocity of the working gas when the first electrode rod 21 and the second electrode rod 22 are discharged, and ensures that the plasma-state working gas generated after the first electrode rod 21 and the second electrode rod 22 are discharged can be quickly output.

[0066] Combination Figure 4 As shown, a portion of the first electrode rod 21 and a portion of the second electrode rod 22 are both inserted into the heating channel 13, and are arranged at intervals inside the heating channel 13. Specifically, the first electrode rod 21 has a first working end, and the second electrode rod 22 has a second working end. The first working end and the second working end are both arranged inside the heating channel 13, and a discharge distance can be maintained between the first working end and the second working end. In this embodiment, the first electrode rod 21 or the second electrode rod 22 can move along the first straight line under the action of the following delivery mechanism, so that the first electrode rod 21 or the second electrode rod 22 can be continuously delivered. At the same time, the discharge distance between the first working end and the second working end can be adjusted. When current is passed through the first electrode rod 21 and the second electrode rod 22, the plasma state conversion rate of the working gas can be regulated, and the temperature between the first working end and the second working end can be regulated, which helps to achieve the regulation of the temperature of the gas output from the gas outlet 12, thereby improving the applicability of the plasma heating furnace.

[0067] It should be further understood that the plasma generating device 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. Specifically, the first electrode rod 21 has a first connection end, and the second electrode rod 22 has a second connection end. Among them, the first connection end is arranged opposite to the first working end, and the second connection end is arranged opposite to the second working end. 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 is used to output direct current to the first electrode rod 21 and the second electrode rod 22. At this time, by adjusting the size of the input current, the discharge distance can be adjusted in coordination, which helps to further improve the control effect of the temperature of the working gas between the first working end and the second working end, thereby ensuring the accuracy of the output temperature of the plasma heating furnace.

[0068] like Figure 5 As shown, the first electrode rod and / or the second electrode rod is configured as a plurality of electrode units, and two adjacent electrode units are connected by threads. The first electrode rod or the second electrode rod is configured as a plurality of electrode units screwed end to end, which helps to ensure that the first electrode rod or the second electrode rod has a sufficient length for use. In this embodiment, the first electrode rod or the second electrode rod is configured as three electrode units, and each electrode unit is configured as a graphite electrode. Of course, the electrode unit can also be configured as an electrode of other materials. With such a configuration, the plasma generating assembly can cooperate with the delivery mechanism to further ensure that the continuous delivery of the electrode unit can be implemented, thereby helping to increase the service life of the electrode unit in the plasma heating furnace, such as the first electrode rod 21 and the second electrode rod 22 can be used continuously for up to 30,000 hours (can work continuously for more than 3 years).

[0069] At this time, the number of the above-mentioned plasma generating components is multiple, and the multiple plasma generating components are arranged on the furnace body at intervals. Figure 5 As shown, a plurality of electrode assemblies can be arranged at intervals along the extension direction of the heating channel. Such an arrangement can further increase the power usage of the plasma heating furnace from the existing 2MW to more than 30MW. At this time, the temperature of the target gas output by the plasma heating furnace can be adjusted from 200 to 3000 degrees (and can be increased to a higher temperature required for industrial production), which helps to further improve the thermal conversion efficiency of the plasma heating furnace and improve the utilization of resources.

[0070] like Figure 3 , Figure 6 and Figure 7As shown, the delivery mechanism is used to clamp and drive the first electrode rod 21 and / or the second electrode rod 22 to move, so as to achieve the approach or distance between the first working end and the second working end, thereby achieving the purpose of adjusting the discharge distance between the first working end and the second working end. Specifically, there are two delivery mechanisms, one of which is used to clamp the portion of the first electrode rod 21 outside the furnace body 1, and the other of the two delivery mechanisms is used to clamp the portion of the second electrode rod 22 outside the furnace body 1. In this embodiment, the structures of the two delivery mechanisms are the same. For the convenience of description, the two delivery mechanisms are respectively referred to as the first delivery mechanism and the second delivery mechanism, wherein the first delivery mechanism is used to drive the first electrode rod 21 to move, and the second delivery mechanism is used to drive the second electrode rod 22 to move.

[0071] Specifically, the first delivery mechanism includes a first driving member 31 and a first clamping assembly 32, and correspondingly, the second delivery mechanism includes a second driving member 33 and a second clamping assembly 34. In this embodiment, the first driving member 31 is arranged on the furnace body, and the first clamping assembly 32 is arranged at the output end of the first driving member 31. The second driving member 33 is arranged on the same mounting base as the furnace body 1, and the second clamping assembly 34 is arranged at the output end of the second driving member 33. As a preferred embodiment, a mounting platform 14 is arranged on the side wall of the furnace body 1, the first driving member 31 is fixedly mounted on the mounting platform 14, and the second driving member 33 is fixedly arranged on the ground. Among them, the first driving member 31 and the second driving member 33 are both arranged as hydraulic cylinders.

[0072] It should be further understood that the first driving member 31 and the second driving member 33 are configured to move synchronously, so as to drive the first electrode rod 21 and the second electrode rod 22 to move synchronously. Such a configuration can make the first electrode rod 21 and the second electrode rod 22 move closer to or farther away from each other, which helps to further improve the control accuracy of the delivery mechanism on the discharge distance between the first electrode rod 21 and the second electrode rod 22, thereby improving the accuracy of its temperature control of the working gas, which can further improve the use effect of the heat source supply furnace.

[0073] In this embodiment, since the first clamping assembly 32 and the second clamping assembly 34 have the same structure, the first clamping assembly 32 is taken as an example for description. 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.

[0074] 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 327 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.

[0075] Here, it should be noted that, in addition to fixing the first clamping member 322 on the connecting plate 321, the first clamping member 322 can also be movably set on the connecting plate 321, and in this case, another cylinder needs to be set on the connecting plate 321, and the two cylinders move synchronously to ensure that the clamping position of the first electrode rod 21 is fixed. Of course, the first clamping member 322 is fixedly set on the connecting plate 321, which helps to determine the clamping position of the first electrode rod 21, and the clamping effect of the first electrode rod 21 is optimal.

[0076] In addition, the first clamping member 322 has a first action surface that abuts against the first electrode rod 21, and the second clamping member 323 has a second action surface that abuts against the first electrode rod 21. Preferably, the first action surface and the second action surface are both configured as arc surfaces, and can be closely connected with the peripheral surface of the first electrode rod 21. Such a configuration helps to reduce the damage of the first clamping assembly 32 to the first electrode rod 21 and helps to ensure the stability of the clamping. At the same time, as a preferred embodiment, the first clamping member 322 and the second clamping member 323 are both configured as high-temperature resistant ceramic pipes, and can be customized according to the size of the first electrode rod 21 or the second electrode rod 22.

[0077] like Figure 3 , Figure 4 and Figure 8As shown, two sealing components 4 are provided on the furnace body 1, and the first electrode rod 21 passes through one of the two sealing components 4, and the second electrode rod 22 passes through the other of the two sealing components 4. Since the first electrode rod 21 and the second electrode rod 22 are both provided on the furnace body 1 and extend into the heating channel 13, and the heating channel 13 is used to transport the working gas, the sealing component 4 is provided on the furnace body 1, so that the airflow in the heating channel 13 can be effectively prevented from escaping, the loss of high-temperature gas can be reduced, and the heat conversion rate of the plasma heating furnace can be guaranteed. In this embodiment, the number of sealing components 4 is two, and they are respectively provided at the top and bottom of the furnace body. In addition, the provision of the sealing component 4 can also prevent external substances from entering the furnace body 1, thereby improving the safety of the furnace body 1 when in use.

[0078] At this time, for the convenience of description, the sealing assembly 4 located at the top of the furnace body is taken as an example for description. Figure 8 As shown, the sealing assembly 4 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, and the first electrode rod 21 is passed through the first connection seat 41. Specifically, a mounting opening is opened on the furnace body, the first connection seat 41 is welded on the mounting opening, 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 one end thereof abuts against the baffle 411, 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, so as to fix the protective member 42 inside the first connection seat 41. In this embodiment, the protective member 42 is an electrode insulating sleeve and is located between the inner wall of the first connecting seat 41 and the circumferential surface of the first electrode rod 21, that is, the protective member 42 is sleeved on the first electrode rod 21, which helps to prevent direct current from flowing to the furnace body 1 through the first electrode rod 21, thereby helping to improve the safety of the furnace body 1 during use.

[0079] In this embodiment, the second connection seat 43 is connected to the first connection seat 41 by bolts, and a connection member 45 is provided between the second connection seat 43 and the first connection seat 41. The connection member 45 can effectively ensure the sealing of the connection between the second connection seat 43 and the first connection seat 41, which helps to reduce the loss of gas. The connection member 45 can be set as a rubber member.

[0080] Still Figure 8As 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 abuts against 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, and at this time, the support plate 432, the inner wall of the seat body 431, and the sealing cover 433 cooperate to form an accommodating space, and the above-mentioned sealing member 44 is fixedly provided in the accommodating space and abuts against 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, wherein the sleeves 441 are in contact with the support plate 432 and the sealing cover 433, and a high temperature resistant skeleton oil seal 442 is arranged between two adjacent sleeves 441. Such an arrangement helps to improve the sealing effect of the sealing assembly 4, reduce gas loss, and ensure the feasibility of the insertion and movement of the first electrode rod 21.

[0081] In addition, a cooling sleeve 434 is provided on the outer peripheral surface of the seat body 431. The cooling sleeve 434 is welded to the outer side of the seat body 431 and cooperates with the seat body 431 to form a cooling cavity. At the same time, an inlet and an outlet connected to the cooling cavity are provided on the cooling sleeve 434 for inputting and outputting the cooling liquid. The provision of the cooling sleeve 434 helps to reduce the temperature of the sealing assembly 4 and improve the safety of the plasma heating furnace.

[0082] like Figure 1-Figure 2 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 13. 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 12 to detect the temperature of the output end of the heating channel 13, that is, the gas temperature at the gas outlet 12. By arranging the first detection member 51 on the furnace body 1, the size of the discharge distance can be adjusted in conjunction with the above-mentioned delivery mechanism, and thus the temperature of the working gas output by the plasma heating furnace can be regulated.

[0083] It should be further understood that the detection assembly further includes a second detection member 52 and a third detection member 53, 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 12. By providing the second detection member 52, the temperature change of the working gas when it moves in the heating channel 13 can be determined in cooperation with the first detection member 51, thereby helping to further improve the control of the temperature of the output gas.

[0084] At this time, the third detection member 53 is disposed on the circumferential surface of the furnace body 1, and the third detection member 53 is used to detect the discharge distance between the first electrode rod 21 and the second electrode rod 22. Figure 1 , Figure 2 and Fig. 9 As shown, an observation port is provided on the peripheral surface of the furnace body 1, and the third detection member 53 is configured as a sight glass and is disposed on the observation port. As a preferred embodiment, a scale is provided on the sight glass to improve the accuracy of observation and provide a data basis for adjusting the discharge distance.

[0085] like Figure 8 As shown, the plasma heating furnace also includes a constraint mechanism to effectively constrain the target gas so that the airflow and heat in the heating channel 13 do not escape, thereby improving the utilization efficiency of the plasma heating furnace. In this embodiment, the constraint mechanism includes an air supply component and an air supply component, wherein the air supply component is used to output the working gas to the air supply component, and the air supply component is used to constrain the working gas mixed with the plasma state at the center position of the heating channel 13.

[0086] Specifically, if Figure 3 and Figure 4 As shown, 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 output end of each air inlet pipe 63 is connected to a connecting pipe 62. The connecting pipe 62 extends to the interior of the furnace body 1 and is connected to the air supply member 61. At this time, the air supply member 61 is arranged along the circumference of the heating channel 13, and the air supply member 61 has an air supply port arranged along the extension direction of the heating channel 13. In this embodiment, the number of the air inlet pipes 63 is six, and accordingly, the number of the connecting pipes 62 is six. Figure 4 and Fig. 9 As shown, the air supply member 61 is an integrated structure, and the air supply port is arranged along the circumference of the heating channel 13.

[0087] 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 13, and the air supply ports of the two air supply parts 61 are arranged relatively. When the air supply component inputs working gas to the air supply component, it can form opposing high-pressure airflows in the circumferential direction of the heating channel 13, which helps to limit the flow direction of the gas in the heating channel 13 and reduce heat loss. At the same time, it can also prevent the inner wall of the furnace body 1 from being eroded by high-temperature gas, ensure that the inner wall of the furnace body 1 is not burned, and improve the service life and safety of the equipment. Moreover, the constraint mechanism can also cooperate with the delivery mechanism, the air intake component and the detection component to conduct heat to the working gas input by the air intake component, and quickly neutralize and regulate the temperature of the working gas, so as to achieve the required temperature and flow rate of the set target gas in the shortest time.

[0088] Here, it should be noted that the working gas inputted into the furnace body 1 by the air supply assembly and the working gas flowing in the heating channel 13 are the same type of gas.

[0089] like Figure 4 and Figure 5 As shown, a refractory material 7 and a cooling assembly are provided on the inner wall of the furnace body 1 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 and improve the utilization efficiency. Among them, the refractory material 7 is a high-temperature resistant material or a composite of multiple high-temperature resistant materials. Specifically, the refractory material 7 is set to a graphite refractory material or a corundum brick, a high-alumina brick refractory material.

[0090] At this time, the cooling assembly includes a coolant inlet 81 and a coolant outlet 83 opened on the furnace body, and a cooling channel 82 is arranged between the coolant inlet 81 and the coolant outlet 83. The cooling channel 82 is arranged inside the refractory material 7. Preferably, the cooling channel 82 is spirally arranged in a spiral structure and is arranged around the heating channel 13 as the center. It is helpful to cool down the heat conducted from the inner wall of the refractory material 7, thereby preventing the shell temperature of the furnace body 1 from exceeding the standard, and playing a role in cooling protection. In this embodiment, the material of the cooling channel 82 can be selected from a copper tube or a stainless steel tube, S stainless steel tube, so as to enhance the thermal conductivity and service life of the cooling channel 82, and it is not easy to produce rust.

[0091] It should be further understood that the plasma heating furnace also includes a controller, such as Fig.10 As shown, in this embodiment, the controller is electrically connected to the first detection member 51 and the second detection member 52 of the detection assembly, and the controller is also connected to the first driving member 31, the second driving member 33, the first cylinder 324 of the first clamping assembly 32, and the second cylinder of the second clamping assembly 34. The plasma heating furnace can accurately control the output working gas of the plasma heating furnace through the linkage control of the controller to ensure that the output working gas reaches the required temperature and helps to improve the thermal conversion efficiency of the plasma heating furnace. Preferably, the controller is electrically connected to the current supply member to cooperate with the delivery mechanism to further improve the control effect of the working gas output by the plasma heating furnace.

[0092] The plasma heating furnace of the present application converts the working gas between the first electrode rod 21 and the second electrode rod 22 into a plasma state by means of a direct current supply, and finally outputs a high-temperature working gas with a certain speed from the gas outlet 12, which helps to replace the high-temperature flue gas generated by the combustion of fossil fuels with the high-temperature gas generated by the ionized working gas, provides the heat source required for production for industrial kilns, and helps to eliminate environmental pollution caused by fuel problems. The heat source supply device of the present application, as a heat source for industrial kilns, reduces the demand for fossil fuels, thereby reducing carbon emissions at the source.

[0093] At the same time, the present application also helps to improve the production efficiency of the working gas and ensure the heat conversion efficiency of the heat source supply device by setting a constraint mechanism and a sealing component, so that compared with the prior art, the heat 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 7 to effectively prevent the inner wall of the furnace body 1 from being eroded by 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 target gas, thereby improving the precise control of the plasma heating furnace.

[0094] The plasma gas heating furnace of the present application has the characteristics of high power and high heating temperature. At the same time, it sets a delivery mechanism to drive the movement of the first electrode rod 21 and / or the second electrode rod 22, which can not only realize the continuous delivery of the electrode unit so that it can achieve continuous and stable operation, but also realize the temperature regulation of the high-temperature gas, so that it can provide part or all of the heat source for the industrial kiln, meeting the process and production requirements of the industrial kiln.

[0095] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model 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 utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A plasma heating furnace, characterized in that: include: A furnace body, the furnace body having a heating channel for conveying working gas; A plasma generating device, the plasma generating device comprising an electrode assembly, the electrode assembly comprising a first electrode rod and a second electrode rod, the first electrode rod and the second electrode rod are both arranged on the furnace body along a first straight line, the first straight line is perpendicular to the extension direction of the heating channel; a first working end of the first electrode rod and a second working end of the second electrode rod are both arranged inside the heating channel, and a discharge distance can be maintained between the first working end and the second working end; A delivery mechanism is used to clamp and drive the first electrode rod and / or the second electrode rod to move.

2. The plasma heating furnace according to claim 1, characterized in that: There are two delivery mechanisms, one of which is used to clamp the portion of the first electrode rod outside the furnace body, and the other of which is used to clamp the portion of the second electrode rod outside the furnace body. The two delivery mechanisms are used to drive the first electrode rod and the second electrode rod to move synchronously.

3. The plasma heating furnace according to claim 2, characterized in that: The delivery mechanism comprises: A clamping assembly, the clamping assembly being used to clamp the first electrode rod and / or the second electrode rod at a portion 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.

4. The plasma heating furnace according to claim 3, characterized in that: The clamping assembly comprises: A connecting plate, the connecting plate being fixedly arranged at the power output end of the driving member; a first clamping member, the first clamping member being arranged on the connecting plate; A second clamping member is movably disposed on the connecting plate.

5. The plasma heating furnace according to claim 3, characterized in that: The plasma heating furnace also includes: A first detection member is used to detect the temperature of the working gas at the output end of the heating channel.

6. The plasma heating furnace according to claim 5, characterized in that: Also includes: A controller is electrically connected to the first detection member, and is used to control the start or stop of the driving member.

7. The plasma heating furnace according to claim 2, 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.

8. The plasma heating furnace according to claim 2, characterized in that: The first electrode rod and / or the second electrode rod is configured as a plurality of electrode units, and two adjacent electrode units are connected by threads.

9. The plasma heating furnace according to claim 1, characterized in that: The plasma generating device further comprises: A current supply component has a positive electrode and a negative electrode respectively connected to the first electrode rod and the second electrode rod, and the current supply component is used to output direct current.

10. The plasma heating furnace according to claim 9, characterized in that: There are multiple electrode assemblies, and the multiple electrode assemblies are arranged on the furnace body at intervals.

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