An electric flame heating device

Abstract

The utility model relates to the field of combustor discloses an electric flame heating device, including the shell body and be located in the shell body's steady flame disc, the middle position of steady flame disc sets up a first electric flame generator, and the periphery of steady flame disc is provided with a plurality of second electric flame generators around the distribution setting of first electric flame generator, the output end inboard of shell body is provided with a plurality of third electric flame generators around the circumferential direction distribution setting, and each third electric flame generator all is inwards inclined setting.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, specifically to an electric flame heating device. Background Technology

[0002] A pulverized coal burner is an industrial device that uses a multi-stage, multi-nozzle air supply structure to rapidly and completely combust pulverized coal and generate a high-temperature vortex. It is widely used in industrial furnaces such as rotary kilns, boilers, asphalt mixing plants, annealing furnaces, and forging furnaces. However, existing burners still need improvement in terms of combustion thermal efficiency and environmental friendliness. In view of the aforementioned problems, the inventors of this case conducted in-depth research on these issues, resulting in this invention. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides an electric flame heating device that can improve combustion thermal efficiency while enhancing environmental friendliness.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An electric flame heating device includes an outer shell and a flame stabilizing plate disposed within the outer shell. A first electric flame generator is disposed at the center of the flame stabilizing plate, and a plurality of second electric flame generators are distributed around the first electric flame generator on the flame stabilizing plate. A plurality of third electric flame generators are distributed around the inner side of the output end of the outer shell in a circumferential direction, and each third electric flame generator is inclined inward.

[0006] Furthermore, it also includes a coal slurry supply coil located inside the outer casing; the coal slurry supply coil is located between the third electric flame generator and the flame stabilizing plate, and the coal slurry supply coil has several slurry outlets distributed around the circumference at one end near the third electric flame generator, and the other end of the coal slurry supply coil has a slurry inlet extending to the outside of the outer casing.

[0007] Furthermore, the first, second, and third electric flame generators each include an electrode needle, an insulating ceramic support tube, and a Venturi nozzle.

[0008] One end of the insulating ceramic support tube extends outward to form a nozzle support seat. A Venturi nozzle is mounted on the nozzle support seat. A through hole communicating with the interior of the Venturi nozzle is provided on the nozzle support seat along the axial direction of the insulating ceramic support tube. An electrode needle passes through the insulating ceramic support tube, with its tip extending into the interior of the Venturi nozzle and its other end extending into the exterior of the insulating ceramic support tube. The Venturi nozzle of the first electric flame generator extends to the location of the slurry outlet, while the Venturi nozzles of each of the second electric flame generators do not extend to the location of the slurry outlet. The electrode needle and the Venturi nozzle are made of the same material.

[0009] Furthermore, the insulating ceramic support tube has a limiting step at one end near the venturi nozzle, and the outer wall of the electrode needle has a limiting protrusion that cooperates with the limiting step to achieve limiting.

[0010] Furthermore, the flame stabilizing disc includes an inner ring body, an outer ring body, and a connecting piece connecting the inner ring body and the outer ring body. A first mounting hole for mounting a first electric flame generator is provided through the inner ring body; a second mounting hole for mounting a second electric flame generator is provided through the connecting piece; a first gap is formed between two adjacent connecting pieces; and a second gap is formed between the outer ring body and the inner wall of the outer shell.

[0011] Furthermore, each of the connecting pieces has a guide ramp extending forward on the side facing the output end, and the guide ramps on each connecting piece are arranged on the same side around the circumference.

[0012] Furthermore, the output end of the outer casing extends inward to form an annular inclined plate, and a preset angle is formed between the annular inclined plate and the outer casing. A third mounting hole for installing a third electric flame generator is provided through the annular inclined plate.

[0013] Furthermore, the preset included angle is 45°.

[0014] Furthermore, an annular support body is provided between the free end of the annular inclined plate and the flame stabilizing plate, and the annular support body is a conical structure that gradually narrows from one end near the flame stabilizing plate to the other end; the coal slurry supply coil is wound around the outer wall of the annular support body; the slurry outlet on the coal slurry supply coil is located between the free end of the annular inclined plate and the annular support body.

[0015] Furthermore, the coal slurry supply coil is specifically a copper pipe.

[0016] By adopting the above-described technical solution of this utility model, at least the following beneficial effects are achieved:

[0017] 1. This invention utilizes a first, second, and third electric flame generator to convert electrical energy into heat energy. Simultaneously, it leverages the Venturi effect to rapidly extract and atomize the high-temperature coal slurry supplied to the coil. The atomized high-temperature mist is then mixed with the electric flames generated by the first and third electric flame generators, allowing the atomized high-temperature mist to undergo complete combustion under the influence of the electric flames, thereby providing an additional heat source. Therefore, compared to traditional burners, this electric flame heating device effectively improves combustion thermal efficiency and reduces energy waste.

[0018] 2. Using electricity as a supplementary energy source, electricity has a wide range of sources and can be converted from clean energy sources such as solar energy and wind energy. At the same time, the electric flame can electrolyze the harmful waste gases and substances produced by the combustion of coal powder slurry. No harmful gases or dust pollutants such as carbon dioxide and sulfur dioxide are produced during the combustion process, which can significantly reduce environmental pollution and help achieve carbon emission reduction targets in the industrial sector, thus improving environmental protection. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of an electric flame heating device according to the present invention;

[0020] Figure 2 This is a structural diagram of the output end of an electric flame heating device according to this utility model;

[0021] Figure 3 This is a cross-sectional view of an electric flame heating device according to the present invention;

[0022] Figure 4 This is an exploded view of the first, second, or third electric flame generator of this utility model;

[0023] Figure 5 This is a cross-sectional view of the first, second, or third electric flame generator of this utility model;

[0024] Figure 6 This is a structural diagram of the flame stabilizer disk of this utility model;

[0025] Figure 7 This is a structural diagram of the coal pulverized slurry supply coil of this utility model.

[0026] Figure label:

[0027] Electric flame heating device 100;

[0028] Outer shell 1, annular inclined plate 11, third mounting hole 111;

[0029] Flame stabilizer 2, inner ring 21, first mounting hole 211, outer ring 22, connecting piece 23, second mounting hole 231, guide plate 232, first gap 24, second gap 25;

[0030] First electric flame generator 31, second electric flame generator 32, third electric flame generator 33, electrode needle 341, limiting protrusion ring 3411, insulating ceramic support tube 342, nozzle support seat 3421, through hole 3422, limiting step 3423, venturi nozzle 343.

[0031] Coal powder slurry supply coil 4, slurry outlet 41, slurry inlet 42;

[0032] 5. Circular support body. Detailed Implementation

[0033] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] Please see the appendix Figures 1-7 As shown, this utility model provides a preferred embodiment of an electric flame heating device 100. The electric flame heating device 100 includes a housing 1 and a flame stabilizing plate 2 disposed within the housing 1. A first electric flame generator 31 is disposed at the center of the flame stabilizing plate 2, and a plurality of second electric flame generators 32 are distributed around the first electric flame generator 31 on the flame stabilizing plate 2. A plurality of third electric flame generators 33 are distributed around the circumference on the inner side of the output end of the housing 1, and each third electric flame generator 33 is inclined inward. This utility model utilizes the first electric flame generator 31, the second electric flame generator 32, and the third electric flame generator 33 to convert electrical energy into heat energy and provide the required heat source for other equipment (such as the hot recycling mixing equipment or the drying drum used in the asphalt mixture mixing equipment). Compared with traditional burners, it can improve combustion thermal efficiency and enhance environmental protection.

[0035] In a preferred embodiment of this utility model, in order to provide more heat sources to better meet actual usage needs, the electric flame heating device 100 further includes a coal slurry supply coil 4 disposed inside the outer shell 1; the coal slurry supply coil 4 is located between the third electric flame generator 33 and the flame stabilizing plate 2, and a plurality of slurry outlets 41 are distributed around the circumference at one end of the coal slurry supply coil 4 near the third electric flame generator 33, and the other end of the coal slurry supply coil 4 has a slurry inlet 42 extending to the outside of the outer shell, wherein the slurry inlet 42 is used to input coal slurry into the coal slurry supply coil 4, and the slurry outlet 41 is used to output coal slurry.

[0036] In the preferred embodiment of this utility model, please refer to the following: Figure 4 and Figure 5 As shown, the first electric flame generator 31, the second electric flame generator 32 and the third electric flame generator 33 all include an electrode needle 341, an insulating ceramic support tube 342 and a Venturi nozzle 343. The electrode needle 341 and the Venturi nozzle 343 are made of the same material, and both the electrode needle 341 and the Venturi nozzle 343 are made of high temperature resistant and high conductivity materials.

[0037] One end of the insulating ceramic support tube 342 extends outward to be provided with a nozzle support seat 3421. A venturi nozzle 343 is installed on the nozzle support seat 3421. A through hole 3422 is provided on the nozzle support seat 3421 along the axial direction of the insulating ceramic support tube 342 and communicates with the interior of the venturi nozzle 343. The through hole 3422 is used to allow airflow to pass through. An electrode needle 341 passes through the insulating ceramic support tube 342, with the tip of the electrode needle 341 extending into the interior of the venturi nozzle 343 and the other end of the electrode needle 341 extending into the exterior of the insulating ceramic support tube 342.

[0038] The specific working principles of the first electric flame generator 31, the second electric flame generator 32, and the third electric flame generator 33 of this utility model are as follows: When a high voltage is applied to the electrode needle 341, since both the electrode needle 341 and the Venturi nozzle 343 are made of high-temperature resistant and highly conductive materials, a high voltage difference will be generated between the electrode needle 341 and the Venturi nozzle 343, causing the electrode needle 341 to discharge and break down the gas, and ionize the gas to form plasma above 1000°C; at the same time, a portion of the high-speed airflow introduced from one end of the outer shell 1 will enter the Venturi nozzle 343 through the through hole 3422 on the nozzle support 3421, and blow out the high-temperature plasma to form a plasma jet (i.e., electric flame); when the electric flame is ejected from the Venturi nozzle 343, it can use the Venturi effect to accelerate the flow speed of the plasma electric flame, making the ejected electric flame larger and longer, ensuring that the electric flame can be sprayed to the heating area at high speed, enhancing the heat transfer efficiency and reducing heat loss.

[0039] The Venturi nozzle 343 of the first electric flame generator 31 extends to the position of the slurry outlet 41, while the Venturi nozzle 343 of each of the second electric flame generators 32 does not extend to the position of the slurry outlet 41. In specific operation, each of the second electric flame generators 32 is used to preliminarily heat the high-speed airflow (specifically, a high-speed airflow can be introduced into the outer shell 1 by an induced draft fan) to form a high-speed hot airflow. At the same time, each of the second electric flame generators 32 can also heat the coal powder slurry in the coal powder slurry supply coil 4. Each of the third electric flame generators 33 and the first electric flame generator 31 together form the main electric flame, which is used to provide the main heat source for the entire electric flame heating device 100.

[0040] Furthermore, the insulating ceramic support tube 342 has a limiting step 3423 at one end near the venturi nozzle 343, and the outer wall of the electrode needle 341 has a limiting protrusion ring 3411 that cooperates with the limiting step 3423 to limit the electrode needle 341, thereby improving the stability of use.

[0041] In the preferred embodiment of this utility model, please refer to the following: Figure 6 As shown, the flame stabilizing disc 2 includes an inner ring body 21, an outer ring body 22, and a connecting piece 23 connecting the inner ring body 21 and the outer ring body 22. The inner ring body 21 has a first mounting hole 211 for installing a first electric flame generator 31, and the insulating ceramic support tube 342 of the first electric flame generator 31 is installed in the first mounting hole 211. The connecting piece 23 has a second mounting hole 231 for installing a second electric flame generator 32, and the insulating ceramic support tube 342 of the second electric flame generator 32 is installed in the second mounting hole 231. In specific implementation of this utility model, in order to achieve more uniform initial heating of the incoming high-speed airflow and better heating of the coal powder slurry in the coal powder slurry supply coil 4, a number of connecting pieces 23 are evenly distributed around the circumference between the inner ring body 21 and the outer ring body 22, and each connecting piece 23 has at least two second mounting holes 231, and each second mounting hole 231 is equipped with a second electric flame generator 32.

[0042] A first gap 24 is formed between two adjacent connecting pieces 23, which is used to allow most of the airflow introduced into the outer shell 1 to pass through; a second gap 25 is formed between the outer ring body 22 and the inner wall of the outer shell 1, which is used to allow another small portion of the airflow introduced into the outer shell 1 to pass through.

[0043] Furthermore, each of the connecting pieces 23 has a guide plate 232 extending forward on the side facing the output end, and the guide plates 232 on each connecting piece 23 are arranged on the same side in the circumferential direction. The guide plates 232 are used to guide the airflow, so that the airflow passing through the first gap 24 can rotate under the guidance of the guide plates 232.

[0044] When the electric flame heating device 100 of this utility model is working, most of the airflow introduced from one end of the outer shell 1 passes through the first gap 24 on the flame stabilizing plate 2 and the through holes 3422 on the first electric flame generator 31 and the second electric flame generator 32. At the same time, the airflow passing through the first gap 24 can rotate under the guidance of the guide plate 232, which can effectively control the shape of the flame and prevent the flame from being too large. The airflow passing through the through holes 3422 of the first electric flame generator 31 and the second electric flame generator 32 can blow out high-temperature plasma to form a plasma jet (i.e., electric flame). Another small part of the airflow introduced from one end of the outer shell 1 can pass through the second gap 25 through the through holes 3422 of each of the third electric flame generators 33 to blow out high-temperature plasma to form a plasma jet (i.e., electric flame).

[0045] In a preferred embodiment of this invention, an annular inclined plate 11 extends inward from the output end of the outer casing 1, forming a predetermined angle α between the annular inclined plate 11 and the outer casing 1. A third mounting hole 111 for mounting a third electric flame generator 33 is provided through the annular inclined plate 11, and the insulating ceramic support tube 342 of the third electric flame generator 33 is installed in the third mounting hole 111. In a specific implementation of this invention, a plurality of third mounting holes 111 are evenly distributed around the circumference of the annular inclined plate 11, and a third electric flame generator 33 is installed in each third mounting hole 111. Furthermore, because the annular inclined plate 11 extends inward from the output end of the outer casing 1, the overall shape of the outer casing 1 can be designed to have a Venturi structure, which can more effectively accelerate the introduced airflow.

[0046] In one specific embodiment of this utility model, the preset included angle α is 45°.

[0047] In the preferred embodiment of this utility model, please refer to the following: Figure 3 As shown, an annular support body 5 is provided between the free end of the annular inclined plate 11 and the flame stabilizing plate 2. The annular support body 5 is a conical structure that gradually narrows from one end near the flame stabilizing plate 2 to the other end. In this way, the annular support body 5, the outer shell 1, and the annular inclined plate 11 can roughly form a Venturi structure. The coal slurry supply coil 4 is wrapped around the outer wall of the annular support body 5 to support the coal slurry supply coil 4. The slurry outlet 41 on the coal slurry supply coil 4 is located between the free end of the annular inclined plate 11 and the annular support body 5. That is, the slurry outlet 41 is exactly at the narrowest point of the Venturi structure formed by the annular support body 5, the outer shell 1, and the annular inclined plate 11. In this way, the coal slurry in the coal slurry supply coil 4 can be quickly drawn out and atomized by utilizing the Venturi effect (the principle is similar to that of an industrial dust suppression fog cannon).

[0048] In one specific embodiment of this utility model, in order to better heat the pulverized coal slurry in the pulverized coal slurry supply coil 4, the pulverized coal slurry supply coil 4 is specifically a copper pipe.

[0049] The overall working principle of the electric flame heating device 100 of this utility model is as follows: Coal powder slurry is input into the coal powder slurry supply coil 4 through the slurry inlet 42, and a high-speed airflow is introduced from one end of the outer shell 1. At the same time, the operation of each second electric flame generator 32 is controlled. The airflow passing through the through hole 3422 of the second electric flame generator 32 can blow out the generated high-temperature plasma to form a plasma jet (i.e., electric flame), and realize the preliminary heating of the introduced airflow and the heating of the coal powder slurry in the coal powder slurry supply coil 4.

[0050] The first electric flame generator 31 and each of the third electric flame generators 33 are controlled to operate. The airflow passing through the through holes 3422 of the first electric flame generator 31 and each of the third electric flame generators 33 can blow out the generated high-temperature plasma to form a plasma jet. The formed plasma jet can provide part of the heat source. At the same time, since the slurry outlet 41 is located at the narrowest point of the Venturi structure formed by the annular support body 5, the outer shell 1 and the annular inclined plate 11, the Venturi effect can be used to quickly draw out and atomize the high-temperature coal powder slurry supplied to the coil 4. The atomized high-temperature mist can mix with the electric flame generated by the first electric flame generator 31 and each of the third electric flame generators 33. In this process, water will generate hydrogen and oxygen under the electrolysis and thermal decomposition of the plasma arc in the high-temperature electric flame. This hydrogen will be re-burned, and the coal powder will be efficiently excited and fully burned by the electric flame, thereby providing more heat source and ensuring that the heat source generated by the entire electric flame heating device 100 can meet the actual use requirements.

[0051] By adopting the above-mentioned technical solution of the utility model, at least the following beneficial effects are achieved:

[0052] 1. The electric flame generator 31, 32, and 33 are used to convert electrical energy into heat energy. At the same time, the Venturi effect is used to quickly draw out and atomize the high-temperature coal slurry supplied to the coil 4. The atomized high-temperature mist is mixed with the electric flames generated by the first electric flame generator 31 and each of the third electric flame generators 33, so that the atomized high-temperature mist can be fully burned under the action of the electric flame, thereby providing more heat source. Therefore, compared with traditional burners, the electric flame heating device of this utility model can effectively improve combustion thermal efficiency and reduce energy waste.

[0053] 2. Using electricity as a supplementary energy source, electricity has a wide range of sources and can be converted from clean energy sources such as solar energy and wind energy. At the same time, the electric flame can electrolyze the harmful waste gases and substances produced by the combustion of coal powder slurry. No harmful gases or dust pollutants such as carbon dioxide and sulfur dioxide are produced during the combustion process, which can significantly reduce environmental pollution and help achieve carbon emission reduction targets in the industrial sector, thus improving environmental protection.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electric flame heating device, characterized in that, It includes an outer shell and a flame stabilizing plate disposed within the outer shell. A first electric flame generator is disposed in the middle of the flame stabilizing plate, and several second electric flame generators are distributed around the first electric flame generator on the flame stabilizing plate. Several third electric flame generators are distributed around the inner side of the output end of the outer shell in a circumferential direction, and each third electric flame generator is inclined inward.

2. The electric flame heating device according to claim 1, characterized in that, It also includes a coal slurry supply coil located inside the outer casing; the coal slurry supply coil is located between the third electric flame generator and the flame stabilizing plate, and the coal slurry supply coil has several slurry outlets distributed around the circumference at one end near the third electric flame generator, and the other end of the coal slurry supply coil has a slurry inlet extending to the outside of the outer casing.

3. The electric flame heating device according to claim 1, characterized in that, The first, second, and third electric flame generators each include an electrode needle, an insulating ceramic support tube, and a Venturi nozzle. One end of the insulating ceramic support tube extends outward to form a nozzle support seat. A Venturi nozzle is mounted on the nozzle support seat. A through hole communicating with the interior of the Venturi nozzle is provided on the nozzle support seat along the axial direction of the insulating ceramic support tube. An electrode needle passes through the insulating ceramic support tube, with its tip extending into the interior of the Venturi nozzle and its other end extending into the exterior of the insulating ceramic support tube. The Venturi nozzle of the first electric flame generator extends to the location of the slurry outlet, while the Venturi nozzles of each of the second electric flame generators do not extend to the location of the slurry outlet. The electrode needle and the Venturi nozzle are made of the same material.

4. The electric flame heating device according to claim 3, characterized in that, The insulating ceramic support tube has a limiting step at one end near the venturi nozzle, and the outer wall of the electrode needle has a limiting protrusion that cooperates with the limiting step to achieve limiting.

5. The electric flame heating device according to claim 1, characterized in that, The flame stabilizing plate includes an inner ring body, an outer ring body, and a connecting piece connecting the inner ring body and the outer ring body. A first mounting hole for installing a first electric flame generator is provided through the inner ring body; a second mounting hole for installing a second electric flame generator is provided through the connecting piece; a first gap is formed between two adjacent connecting pieces; a second gap is formed between the outer ring body and the inner wall of the outer shell.

6. The electric flame heating device according to claim 5, characterized in that, Each of the connecting pieces has a guide ramp extending forward on the side facing the output end, and the guide ramps on each connecting piece are arranged on the same side around the circumference.

7. The electric flame heating device according to claim 2, characterized in that, The output end of the outer casing extends inward to form an annular inclined plate, and a preset angle is formed between the annular inclined plate and the outer casing. A third mounting hole for installing a third electric flame generator is provided through the annular inclined plate.

8. The electric flame heating device according to claim 7, characterized in that, The preset included angle is 45°.

9. The electric flame heating device according to claim 7, characterized in that, An annular support body is provided between the free end of the annular inclined plate and the flame stabilizing plate, and the annular support body is a conical structure that gradually narrows from one end near the flame stabilizing plate to the other end; the coal powder slurry supply coil is wrapped around the outer wall of the annular support body; the slurry outlet on the coal powder slurry supply coil is located between the free end of the annular inclined plate and the annular support body.

10. The electric flame heating device according to claim 2, characterized in that, The coal slurry supply coil is specifically a copper pipe.

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