Furnace burner device

Abstract

The utility model relates to the technical field of kilns, in particular to a kiln burner device which comprises a burner and a gas supply mechanism, the burner comprises a support frame and a burning assembly arranged on the support frame, the burning assembly comprises a natural gas outer pipe and an oxygen inner pipe, the natural gas outer pipe is connected with the support frame, and the oxygen inner pipe is connected with the support frame. The oxygen inner pipe is sleeved with the natural gas outer pipe, one end of the oxygen inner pipe extends out of the natural gas outer pipe, and a flame probe is arranged on the outer side of one end of the natural gas outer pipe; the gas supply mechanism comprises a natural gas supply assembly, an oxygen supply assembly and a protection gas supply assembly, the natural gas supply assembly comprises a natural gas pipeline, a filter, a first pneumatic control valve and a stop valve, and the oxygen supply assembly comprises an oxygen pipeline and a second pneumatic control valve; by accurately adjusting the flow of oxygen and natural gas, the baking temperature in the kiln can be accurately controlled, and the service life of the refractory material of the kiln is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of furnace and kiln technology, specifically to a furnace and kiln burner device. Background Technology

[0002] A furnace burner is a device that injects fuel and air in a specific manner for combustion. It is mainly used in furnaces and kilns to ensure efficient and stable fuel combustion. A burner typically consists of a nozzle, a mixing chamber, and an ignition device. Fuel is injected through the nozzle, mixed with air, and then thoroughly mixed in the mixing chamber before being ignited by the ignition device to form a flame for combustion. The burner design should ensure a stable flame, high combustion efficiency, and adaptability to different fuels and operating conditions.

[0003] Existing furnace burners use a mixture of natural gas and air in a certain proportion for combustion. However, due to the low oxygen content in the combustion air, the heat released by the combustion of natural gas in the combustion air is low, resulting in high energy consumption. Furthermore, during the furnace baking process, it is necessary to strictly follow the temperature curve to ensure the life of the furnace refractory materials. Traditional burners only have three flame size adjustment settings, making it difficult to accurately control the furnace temperature. Summary of the Invention

[0004] This invention addresses the problem of existing furnace burners' inability to accurately control the furnace temperature by providing a furnace burner device. This device uses pure oxygen as the combustion-supporting gas, increasing the heat released by the combustion of natural gas in the combustion-supporting gas. At the same time, by precisely adjusting the flow rates of oxygen and natural gas, the baking temperature inside the furnace can be precisely controlled, extending the service life of the furnace refractory materials.

[0005] To achieve the above objectives, the technical solution of this utility model is: a furnace burner device, comprising a burner and a gas supply mechanism. The burner includes a support frame and a combustion assembly mounted on the support frame. The combustion assembly includes a natural gas outer pipe and an oxygen inner pipe. The natural gas outer pipe is connected to the support frame, and the oxygen inner pipe is sleeved inside the natural gas outer pipe. One end of the oxygen inner pipe extends to the outside of the natural gas outer pipe, and a flame probe is provided on the outer side of one end of the natural gas outer pipe. Natural gas is supplied to the furnace through the natural gas outer pipe, and oxygen is simultaneously supplied through the oxygen inner pipe to ensure thorough mixing of the natural gas and oxygen, which is then ignited by an ignition device to form a flame. The burner can be mounted on the furnace through the support frame, and the flame probe serves to detect the flame.

[0006] The gas supply system includes a natural gas supply component, an oxygen supply component, and a protective gas supply component. The natural gas supply component includes a natural gas pipeline, a filter, a pneumatic regulating valve, and a shut-off valve. The natural gas pipeline is connected to an external natural gas pipeline, and the filter, pneumatic regulating valve, and shut-off valve are sequentially installed on the natural gas pipeline. The flow rate of the supplied natural gas can be adjusted by the pneumatic regulating valve; when the flame probe detects that the flame has been extinguished, the shut-off valve can close and cut off the natural gas supply.

[0007] The oxygen supply assembly includes an oxygen pipeline and a second pneumatic regulating valve. The oxygen pipeline is connected to an inner oxygen pipe, and the second pneumatic regulating valve is installed on the oxygen pipeline. The protective supply assembly is connected to both the natural gas pipeline and the oxygen pipeline. The second pneumatic regulating valve can adjust the flow rate of the delivered oxygen.

[0008] Furthermore, the support frame includes a circular plate, a V-shaped plate, a core brick, and a connecting rod. The circular plate has an opening for the core brick to pass through. The V-shaped plates are symmetrically arranged on one side of the circular plate, with the core brick positioned between the two V-shaped plates. Both ends of the connecting rod are fixedly connected to the two V-shaped plates, with the connecting rod positioned at the end of the V-shaped plate furthest from the circular plate. The circular plate and V-shaped plates securely mount the core brick, and the connecting rod limits its movement, preventing it from detaching from the V-shaped plates.

[0009] Furthermore, the gun core brick has a gun core hole that matches the natural gas outer pipe. The diameter of the gun core hole is larger than the diameter of the natural gas outer pipe. The natural gas outer pipe is sleeved in the gun core hole, and the combustion assembly is fitted onto the gun core brick through the gun core hole so that the gun core brick can protect and fix the combustion assembly.

[0010] Furthermore, a shut-off valve is installed on the natural gas external pipeline, and a manual valve is also installed on both sides of the pneumatic regulating valve. When the pneumatic regulating valve is damaged and cannot regulate the natural gas flow, the natural gas flow can be regulated or the natural gas can be cut off through the manual valve.

[0011] Furthermore, the natural gas supply assembly also includes a backup pipeline, which is equipped with a manual valve. Both ends of the backup pipeline are connected to the natural gas pipeline. One end of the backup pipeline is located between the filter and the manual valve, and the other end is located between the shut-off valve and the manual valve. When the pneumatic regulating valve fails and cuts off the natural gas supply, preventing the continued supply of natural gas to the burner, the manual valve can be opened to allow the natural gas to continue flowing through the backup pipeline.

[0012] Furthermore, the oxygen pipeline is equipped with a shut-off valve two, and also with manual valves three located on both sides of the pneumatic regulating valve two; the oxygen supply assembly also includes a backup pipeline two, which is equipped with a manual valve four, and both ends of the backup pipeline two are connected to the oxygen pipeline. When the pneumatic regulating valve two fails and cuts off the oxygen supply, preventing further oxygen delivery to the burner, the manual valve four can be opened to continue supplying oxygen through the backup pipeline two.

[0013] Furthermore, both the natural gas pipeline and the oxygen pipeline are equipped with check valves, flow meters, and pressure gauges. The check valves can prevent backflow of natural gas or oxygen, the flow meters on the natural gas pipeline and the oxygen pipeline can detect the flow rate of natural gas and oxygen respectively, and the pressure gauges on the natural gas pipeline and the oxygen pipeline can detect the delivery pressure of natural gas and oxygen respectively.

[0014] Furthermore, the protective gas supply assembly includes a nitrogen pipeline, a switching pipeline, and a switching valve. The nitrogen pipeline is equipped with a shut-off valve and connects to two switching pipelines, which are respectively connected to a natural gas pipeline and an oxygen pipeline. Each of the two switching pipelines is equipped with a switching valve. When burner flame extinguishing is detected, nitrogen gas can be supplied to the natural gas pipeline and the oxygen pipeline through the nitrogen pipeline and the switching pipeline to protect the burner.

[0015] The beneficial effects of this utility model through the above technical solution are as follows:

[0016] This utility model has a reasonable structure and good performance. It uses pure oxygen as the combustion-supporting gas, which increases the heat released by the combustion of natural gas in the combustion-supporting gas, thus achieving energy saving. At the same time, by precisely adjusting the flow rate of oxygen and natural gas, the temperature inside the kiln can be precisely controlled, so that the kiln baking process can be heated according to the baking curve of the refractory material, thus extending the service life of the kiln refractory material.

[0017] The pneumatic regulating valve one of the natural gas supply assembly of this utility model can regulate the flow rate of natural gas transported in the natural gas pipeline, and the pneumatic regulating valve two of the oxygen supply assembly can regulate the flow rate of oxygen transported in the oxygen pipeline, so as to achieve the effect of precise control of the temperature inside the kiln.

[0018] This invention uses a flame probe on the natural gas pipeline to detect the flame status. When the flame probe detects that the flame has extinguished, the shut-off valve can close the natural gas pipeline to cut off the natural gas supply. At the same time, the gas supply component is protected by supplying nitrogen to the natural gas pipeline and the oxygen pipeline through the nitrogen pipeline and the switching pipeline to protect the burner. This achieves the effect of eliminating safety hazards caused by sudden situations during use, and is sensitive and reliable.

[0019] When the pneumatic regulating valve 1 fails and cannot regulate the natural gas flow, the natural gas flow can be regulated or cut off via manual valve 1. When the pneumatic regulating valve 1 fails and cuts off the natural gas flow, and the natural gas cannot continue to be supplied to the burner, the natural gas can continue to be supplied via manual valve 2 and backup pipeline 1. At the same time, when the pneumatic regulating valve 2 fails and cannot regulate the oxygen flow, the oxygen flow can be regulated or cut off via manual valve 3. When the pneumatic regulating valve 2 fails and cuts off the oxygen flow, and the oxygen cannot continue to be supplied to the burner, the oxygen can continue to be supplied via manual valve 4 and backup pipeline 2, thereby reducing the failure rate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a furnace burner device according to the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the burner of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the support component of this utility model.

[0023] The attached diagram is labeled as follows: 1 is the outer natural gas pipe, 2 is the inner oxygen pipe, 3 is the circular plate, 4 is the V-shaped plate, 5 is the connecting rod, 6 is the gun core brick, 601 is the gun core hole, 7 is the natural gas pipeline, 8 is the shut-off valve one, 9 is the filter, 10 is the pneumatic regulating valve one, 11 is the manual valve one, 12 is the backup pipeline one, 13 is the manual valve two, 14 is the shut-off valve, 15 is the check valve, 16 is the flow meter, 17 is the pressure gauge, 18 is the oxygen pipeline, 19 is the shut-off valve two, 20 is the pneumatic regulating valve two, 21 is the manual valve three, 22 is the backup pipeline two, 23 is the manual valve four, 24 is the nitrogen pipeline, 25 is the shut-off valve three, 26 is the switching pipeline, and 27 is the switching valve. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0025] like Figures 1-3As shown, a furnace burner device includes a burner and a gas supply mechanism. The burner includes a support frame and a combustion assembly mounted on the support frame. The combustion assembly includes a natural gas outer pipe 1 and an oxygen inner pipe 2. The natural gas outer pipe 1 is connected to the support frame. The oxygen inner pipe 2 is sleeved inside the natural gas outer pipe 1. One end of the oxygen inner pipe 2 extends to the outside of the natural gas outer pipe 1. A flame probe is provided on the outside of one end of the natural gas outer pipe 1. In this embodiment, the combustion assembly is fixed by a support frame, and natural gas is supplied to the furnace through the natural gas outer pipe 1. The natural gas outer pipe 1 is a cylindrical structure with one end open and the other end closed. The diameter of the natural gas outer pipe 1 is twice the diameter of the oxygen inner pipe 2. Pure oxygen is supplied to the furnace through the oxygen inner pipe 2. The combustion gas for natural gas combustion is pure oxygen, which replaces the compressed air used in traditional burners. The combustion efficiency is 50-70% higher than that of traditional burners, resulting in significant energy savings. Both the natural gas outer pipe 1 and the oxygen inner pipe 2 are made of 310s stainless steel, which has the advantage of high temperature resistance. In this embodiment, the flow rate of natural gas and oxygen is adjusted by the central control DCS system to change the size of the burner flame and achieve the purpose of controlling the furnace temperature. The flame probe can detect the state of the burner flame. When the burner flame is extinguished, the flame probe can feed back the signal to the central control DCS system.

[0026] The gas supply mechanism includes a natural gas supply component, an oxygen supply component, and a protective gas supply component. The natural gas supply component includes a natural gas pipeline 7, a filter 9, a pneumatic regulating valve 10, and a shut-off valve 14. The natural gas pipeline 7 is connected to the natural gas external pipe 1. The filter 9, the pneumatic regulating valve 10, and the shut-off valve 14 are sequentially installed on the natural gas pipeline 7. In this embodiment, the natural gas pipeline 7 includes a natural gas pipe and a metal hose. The natural gas pipe is connected to the natural gas outer pipe 1 through the metal hose to facilitate the disassembly and installation of the burner. The filter 9 can filter the natural gas supplied to the burner in the natural gas pipeline 7. The pneumatic regulating valve 10 regulates the flow rate of the natural gas supplied in the natural gas pipeline 7. The shut-off valve 14 can cut off the natural gas supplied in the natural gas pipeline 7. The shut-off valve 14 is a pneumatic valve. Both the shut-off valve 14 and the pneumatic regulating valve 10 are electrically connected to the central control DCS system. When the flame probe detects that the burner flame has been extinguished and feeds the signal back to the central control DCS system, the central control DCS system controls the shut-off valve 14 to cut off the natural gas supplied in the natural gas pipeline 7 and stop the supply of natural gas to the burner. The pneumatic regulating valve 10 can be controlled by the central control DCS system to regulate the flow rate of natural gas.

[0027] The oxygen supply assembly includes an oxygen pipeline 18 and a pneumatic regulating valve 20. The oxygen pipeline 18 is connected to the inner oxygen pipe 2, and the pneumatic regulating valve 20 is installed on the oxygen pipeline 18. The protective gas supply assembly is connected to the natural gas pipeline 7 and the oxygen pipeline 18. In this embodiment, the oxygen pipeline 18 includes an oxygen tube and a flexible metal tube. The oxygen tube is connected to the inner oxygen pipe 2 through the flexible metal tube. The pneumatic regulating valve 20 can regulate the oxygen flow rate delivered in the oxygen pipeline 18. The pneumatic regulating valve 20 is electrically connected to the central control DCS system, and the central control DCS system can control the pneumatic regulating valve 20 to regulate the oxygen flow rate.

[0028] The support frame includes a circular plate 3, a V-shaped plate 4, a core brick 6, and connecting rods 5. The circular plate 3 has an opening for the core brick 6 to pass through. The V-shaped plates 4 are symmetrically arranged on one side of the circular plate 3, with the core brick 6 positioned between the two V-shaped plates 4. The two ends of the connecting rods 5 are fixedly connected to the two V-shaped plates 4 respectively, and the connecting rods 5 are located at the ends of the V-shaped plates 4 furthest from the circular plate 3. In this embodiment, the two V-shaped plates 4 are welded and fixed to the connecting rods 5 and the circular plate 3. The two V-shaped plates 4 serve to limit and fix the core brick 6. There are two connecting rods 5, which also limit the core brick 6. The support frame allows the combustion assembly to be fixedly installed at the mounting holes on the furnace.

[0029] The core brick 6 has a core hole 601 that matches the natural gas outer pipe 1. The diameter of the core hole 601 is larger than the diameter of the natural gas outer pipe 1, and the natural gas outer pipe 1 is fitted inside the core hole 601. In this embodiment, the core hole 601 provides an installation position for the natural gas outer pipe 1. The purpose of the core hole 601 being larger than the diameter of the natural gas outer pipe 1 is to facilitate the installation of the natural gas outer pipe 1 on the core brick 6. The core brick 6 serves to protect and fix the natural gas outer pipe 1 and the oxygen inner pipe 2.

[0030] A shut-off valve 8 is installed on the natural gas external pipeline 1, and manual valves 11 are also installed on both sides of the pneumatic regulating valve 10. In this embodiment, the shut-off valve 8 is used to open and close the natural gas external pipeline 1; there are two manual valves 11, which are ball valves. When the pneumatic regulating valve 10 is damaged and cannot regulate the natural gas flow, the natural gas flow can be regulated or cut off through the manual valves 11. When the pneumatic regulating valve 10 is in normal use, both manual valves 11 are in the open state; the natural gas is stored in a gas storage tank, and the shut-off valve 8 is in the open state.

[0031] The natural gas supply assembly also includes a backup pipeline 12, on which a manual valve 13 is installed. Both ends of the backup pipeline 12 are connected to the natural gas pipeline 7. One end of the backup pipeline 12 is located between the filter 9 and the manual valve 11, and the other end is located between the shut-off valve 14 and the manual valve 11. In this embodiment, the manual valve 13 is a ball valve. When the pneumatic regulating valve 10 fails and cuts off the natural gas, preventing the natural gas from continuing to be supplied to the burner, the manual valve 13 is opened, allowing the natural gas to be supplied to the backup pipeline 12, bypassing the pneumatic regulating valve 10, and continuing to be supplied to the burner along the natural gas pipeline 7.

[0032] The oxygen pipeline 18 is equipped with a shut-off valve 2 19, and the oxygen pipeline 18 is also equipped with a manual valve 3 21 located on both sides of the pneumatic regulating valve 20; the oxygen supply assembly also includes a backup pipeline 2 22, the backup pipeline 2 22 is equipped with a manual valve 4 23, and both ends of the backup pipeline 2 22 are connected to the oxygen pipeline 18. In this embodiment, shut-off valve 219 serves to open and close oxygen pipeline 18; there are two manual valves 321, which are ball valves. When pneumatic regulating valve 20 is damaged and cannot regulate the natural gas flow, the oxygen flow can be regulated or cut off by manual valve 321. When pneumatic regulating valve 20 is in normal use, both manual valves 321 are in the open state. When pneumatic regulating valve 20 is damaged and cuts off the oxygen, and the oxygen cannot continue to be delivered to the burner, manual valve 423 is opened, and the oxygen can be delivered to the backup pipeline 22, bypassing pneumatic regulating valve 220 and continuing to be delivered to the burner along the oxygen pipeline 18; the oxygen is stored in the gas storage tank, and shut-off valve 219 is in the open state.

[0033] Both the natural gas pipeline 7 and the oxygen pipeline 18 are equipped with check valves 15, flow meters 16, and pressure gauges 17. In this embodiment, the check valve 15 on the natural gas pipeline 7 prevents natural gas backflow, the flow meter 16 detects the flow rate of natural gas transported in the natural gas pipeline 7, and the pressure gauge 17 detects the pressure of natural gas transported in the natural gas pipeline 7; similarly, the check valve 15 on the oxygen pipeline 18 prevents oxygen backflow, the flow meter 16 detects the flow rate of oxygen transported in the oxygen pipeline 18, and the pressure gauge 17 detects the pressure of oxygen transported in the oxygen pipeline 18.

[0034] The protective gas supply assembly includes a nitrogen pipeline 24, a switching pipeline 26, and a switching valve 27. A shut-off valve 25 is installed on the nitrogen pipeline 24. The nitrogen pipeline 24 connects to two switching pipelines 26, which are respectively connected to a natural gas pipeline 7 and an oxygen pipeline 18. Each of the two switching pipelines 26 is equipped with a switching valve 27. In this embodiment, the shut-off valve 25 functions to open and close the nitrogen pipeline 24. The switching valves 27 on both switching pipelines 26 are pneumatic valves and are electrically connected to the central control DCS system. When the flame probe detects that the burner flame has extinguished and feeds the signal back to the central control DCS system, the central control DCS system controls the shut-off valve 14 to close while simultaneously controlling the two switching valves 27 to open, thereby supplying nitrogen to the oxygen pipeline 18 and the natural gas pipeline 7 to protect the burner. The nitrogen is stored in a gas storage tank, and the shut-off valve 25 is in the open state.

[0035] The working principle of this utility model is as follows: Before use, leak testing is performed at each connection plate of the pipeline and burner. The burner is placed in an open and ventilated place, with no hot work within 10 meters. The pneumatic regulating valve -10 is opened and the pressure is maintained at 0.1MPa. Soap water is used to test for leaks at the connection between the natural gas pipe and the metal hose, and at the connection between the natural gas outer pipe 1 and the metal hose. If there is a leak, the screws at the connecting flange are tightened. Then the pneumatic regulating valve -10 is closed. The same method is then used to test for leaks at each connection of the oxygen pipeline.

[0036] Before igniting the burner, place it in an open area on the platform, where personnel are prohibited from passing by. Put the self-shut-off valve 14 on the natural gas pipeline 7 into the manual open state; open the shut-off valve 19 and manual valve 21 on the oxygen pipeline 18, and use the pneumatic regulating valve 20 to control the oxygen pressure of the oxygen pipeline 18 to 0.04 MPa. Then, use a glowing wooden stick to check whether the stick can reignite at the burner inlet to determine whether the oxygen has passed through the burner and whether the concentration meets the requirements. After the oxygen level is normal, close the pneumatic regulating valve 20 on the oxygen pipeline 18; then open the shut-off valve 8 and manual valve 11 on the natural gas pipeline 7, and adjust the pneumatic regulating valve 10 to make the natural gas pressure in the natural gas pipeline 7 0.04MPa. Use a natural gas leak detector to measure that the natural gas is flowing through the burner head; then open the pneumatic regulating valve 20 on the oxygen pipeline 18 again to control the oxygen pressure in the oxygen pipeline 18 to 0.04MPa. Then ignite the oxygen and natural gas mixture at the burner opening with a torch. The mixture burns stably. Then, the operator can insert the natural gas outer pipe 1 into the gun core hole 601, and then install the support frame in the burner hole on the kiln and adjust and fix the angle.

[0037] When the burner is in use, the pneumatic regulating valve 10 and pneumatic regulating valve 20 can be controlled by the central control DCS system to adjust the flow rate of natural gas in natural gas pipeline 7 and the flow rate of oxygen in oxygen pipeline 18, thereby adjusting the size of the burner flame and controlling the baking temperature in the kiln. The ratio of natural gas to oxygen flow rate is 1:2.5 to ensure that the natural gas is fully combusted.

[0038] When the burner is in use, after the flame probe detects that the burner flame has been extinguished, it sends a signal to the central control DCS system. The central control DCS system then controls the shut-off valve 14 to close and simultaneously controls the two switching valves 27 to open, supplying nitrogen to the oxygen pipeline 18 and the natural gas pipeline 7 through the nitrogen pipeline 24 and the switching pipeline 26 to protect the burner.

[0039] The embodiments described above are merely preferred embodiments of the utility model and are not intended to limit the scope of the utility model. Therefore, all equivalent changes or modifications made to the technical solutions described in the scope of the utility model patent application should be included within the scope of the utility model patent application.

Claims

1. A furnace burner device, characterized in that, The device includes a burner and a gas supply mechanism. The burner includes a support frame and a combustion assembly mounted on the support frame. The combustion assembly includes a natural gas outer pipe (1) and an oxygen inner pipe (2). The natural gas outer pipe (1) is connected to the support frame. The oxygen inner pipe (2) is sleeved inside the natural gas outer pipe (1). One end of the oxygen inner pipe (2) extends to the outside of the natural gas outer pipe (1). A flame probe is provided on the outside of one end of the natural gas outer pipe (1). The gas supply mechanism includes a natural gas supply component, an oxygen supply component and a protective gas supply component. The natural gas supply component includes a natural gas pipeline (7), a filter (9), a pneumatic regulating valve (10) and a shut-off valve (14). The natural gas pipeline (7) is connected to the natural gas external pipe (1). The filter (9), the pneumatic regulating valve (10) and the shut-off valve (14) are sequentially installed on the natural gas pipeline (7). The oxygen supply assembly includes an oxygen pipeline (18) and a pneumatic regulating valve (20). The oxygen pipeline (18) is connected to the oxygen inner pipe (2), and the pneumatic regulating valve (20) is installed on the oxygen pipeline (18). The protective gas supply assembly is connected to the natural gas pipeline (7) and the oxygen pipeline (18).

2. The furnace burner device according to claim 1, characterized in that, The support frame includes a circular plate (3), a V-shaped plate (4), a gun core brick (6), and a connecting rod (5). The circular plate (3) has an opening for the gun core brick (6) to pass through. The V-shaped plates (4) are symmetrically arranged on one side of the circular plate (3). The gun core brick (6) is located between the two V-shaped plates (4). The two ends of the connecting rod (5) are fixedly connected to the two V-shaped plates (4) respectively. The connecting rod (5) is located at the end of the V-shaped plate (4) away from the circular plate (3).

3. A furnace burner device according to claim 2, characterized in that, The gun core brick (6) has a gun core hole (601) that matches the natural gas outer pipe (1). The diameter of the gun core hole (601) is larger than the diameter of the natural gas outer pipe (1). The natural gas outer pipe (1) is fitted inside the gun core hole (601).

4. A furnace burner device according to claim 1, characterized in that, The natural gas outer pipe (1) is equipped with a shut-off valve (8), and the natural gas outer pipe (1) is also equipped with a manual valve (11) located on both sides of the pneumatic regulating valve (10).

5. A furnace burner device according to claim 4, characterized in that, The natural gas supply assembly also includes a backup pipeline (12), on which a manual valve (13) is installed. Both ends of the backup pipeline (12) are connected to the natural gas pipeline (7). One end of the backup pipeline (12) is located between the filter (9) and the manual valve (11), and the other end of the backup pipeline (12) is located between the shut-off valve (14) and the manual valve (11).

6. A furnace burner device according to claim 1, characterized in that, The oxygen pipeline (18) is equipped with a shut-off valve two (19), and the oxygen pipeline (18) is also equipped with a manual valve three (21) located on both sides of the pneumatic regulating valve two (20); the oxygen supply assembly also includes a backup pipeline two (22), the backup pipeline two (22) is equipped with a manual valve four (23), and both ends of the backup pipeline two (22) are connected to the oxygen pipeline (18).

7. A furnace burner device according to claim 1, characterized in that, Both the natural gas pipeline (7) and the oxygen pipeline (18) are equipped with check valves (15), flow meters (16) and pressure gauges (17).

8. A furnace burner device according to claim 1, characterized in that, The protective gas supply assembly includes a nitrogen pipeline (24), a switching pipeline (26), and a switching valve (27). The nitrogen pipeline (24) is equipped with a shut-off valve (25). The nitrogen pipeline (24) is connected to two switching pipelines (26). The two switching pipelines (26) are respectively connected to a natural gas pipeline (7) and an oxygen pipeline (18). The two switching pipelines (26) are each equipped with a switching valve (27).

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