Soot blowing equipment matched with natural gas

Abstract

The utility model relates to the technical field of soot blowing equipment, one embodiment of the utility model provides natural gas matched soot blowing equipment which comprises a mixer, an air pipeline, a natural gas pipeline and an oxygen pipeline, and the outlet end of the air pipeline communicates with an inlet of the mixer; the outlet end of the natural gas pipeline is communicated with the air pipeline; and the outlet end of the oxygen pipeline is communicated with the air pipeline. By means of the technical scheme, the technical problem that when mixed gas is used for pulse soot blowing of a boiler in the prior art, combustion is insufficient, and energy waste is caused is solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of soot blowing equipment technology, and more specifically, to a soot blowing equipment for natural gas applications. Background Technology

[0002] Natural gas-powered soot blowing equipment is mainly used to mix natural gas and air to obtain a mixed gas, which is then used for pulse soot blowing in boilers. Current natural gas-powered soot blowing equipment has a relatively simple structure. Natural gas and air enter through the mixer inlet, mix, and then exit through the mixer outlet for pulse soot blowing in boilers. However, the mixed gas does not burn completely, resulting in energy waste. Utility Model Content

[0003] To overcome the above-mentioned defects, the embodiments of this disclosure provide a natural gas-supporting soot blowing device, which solves the technical problem in the related art that insufficient combustion of mixed gas during pulse soot blowing of boilers leads to energy waste.

[0004] According to one aspect, at least one embodiment of this disclosure provides a natural gas-supporting soot blowing device, comprising,

[0005] mixer,

[0006] An air duct, the outlet end of which is connected to the inlet of the mixer;

[0007] A natural gas pipeline, the outlet end of which is connected to the air pipeline;

[0008] An oxygen pipeline, the outlet end of which is connected to the air pipeline.

[0009] For example, in at least one embodiment of this disclosure, a natural gas-supporting soot blowing device further includes,

[0010] Air filter,

[0011] An air pressure reducing valve is connected in series between the air filter and the inlet end of the air duct.

[0012] For example, in at least one embodiment of the natural gas soot blowing equipment provided in this disclosure, the number of air pressure reducing valves is two, and the two air pressure reducing valves are connected in series between the air filter and the air pipeline, and also includes,

[0013] A first air control valve is connected in series between the two air pressure reducing valves;

[0014] A second air control valve, one end of which is connected to the outlet end of the air pressure reducing valve near the air filter, and the other end of which is connected to the outlet end of another air pressure reducing valve.

[0015] For example, in at least one embodiment of this disclosure, a natural gas-supporting soot blowing device further includes,

[0016] A three-way valve, wherein the two ports of the three-way valve are connected between the outlet end of the air pressure reducing valve, which is away from the air filter, and the inlet end of the air duct;

[0017] An air flow meter is installed on the third port of the three-way valve.

[0018] For example, in at least one embodiment of this disclosure, a natural gas-supporting soot blowing device further includes,

[0019] Oxygen filter,

[0020] An oxygen pressure reducing valve, wherein the inlet end of the oxygen pressure reducing valve is connected to the outlet end of the oxygen filter;

[0021] An oxygen control valve is connected in series between the oxygen pressure reducing valve and the inlet end of the oxygen pipeline;

[0022] An oxygen flow meter is disposed between the outlet end of the oxygen pressure reducing valve and the inlet end of the oxygen control valve.

[0023] For example, in at least one embodiment of this disclosure, a natural gas-supporting soot blowing device further includes,

[0024] An oxygen regulating valve, wherein the outlet end of the oxygen regulating valve is connected to the inlet end of the oxygen filter;

[0025] An oxygen check valve is connected in series between the oxygen control valve and the inlet end of the oxygen pipeline.

[0026] For example, in at least one embodiment of this disclosure, a natural gas-supporting soot blowing device further includes,

[0027] Natural gas filter,

[0028] A natural gas pressure reducing valve, wherein the inlet end of the natural gas pressure reducing valve is connected to the outlet end of the natural gas filter;

[0029] A natural gas control valve, wherein the natural gas control valve is connected in series between the outlet end of the natural gas pressure reducing valve and the inlet end of the natural gas pipeline;

[0030] A natural gas flow meter is installed between the outlet end of the natural gas pressure reducing valve and the inlet end of the natural gas control valve.

[0031] For example, in at least one embodiment of this disclosure, a natural gas-supporting soot blowing device further includes,

[0032] A natural gas regulating valve, wherein the outlet end of the natural gas regulating valve is connected to the inlet end of the natural gas filter;

[0033] A natural gas check valve is connected in series between the natural gas control valve and the inlet end of the natural gas pipeline.

[0034] For example, in at least one embodiment of this disclosure, a natural gas-supporting soot blowing device further includes,

[0035] A flame arrester, wherein the flame arrester is connected in series between the natural gas control valve and the natural gas check valve;

[0036] A shut-off valve is connected in series between the natural gas control valve and the flame arrester.

[0037] For example, in at least one embodiment of the present disclosure, a natural gas-supporting soot blowing device further includes a diversion plug. The outlet end of the natural gas pipeline and the outlet end of the oxygen pipeline both extend into the air pipeline and bend toward the inlet end of the air pipeline. The diversion plug is provided at the outlet end of the natural gas pipeline and the outlet end of the oxygen pipeline. The diversion plug is conical, and the diameter of the diversion plug gradually decreases from one end near the mixer to the other end. The outlet end sidewall of the natural gas pipeline has multiple natural gas diversion ports, and the outlet end sidewall of the oxygen pipeline has multiple oxygen diversion ports.

[0038] The beneficial effects of the embodiments disclosed are as follows: the outlet end of the air pipeline is connected to the inlet of the mixer; the outlet end of the natural gas pipeline is connected to the air pipeline; and the outlet end of the oxygen pipeline is connected to the air pipeline.

[0039] Compared to directly mixing natural gas and air for pulse soot blowing, the addition of oxygen in this disclosure is of great significance. Firstly, oxygen itself is a combustion-supporting agent; when mixed with natural gas and air, it ignites instantaneously during pulse soot blowing, causing the mixture to burn at higher temperatures and significantly enhancing its expansion energy. Secondly, oxygen improves the combustion reaction process, allowing for more complete combustion of the mixture, reducing energy waste and laying the foundation for subsequent efficient soot blowing.

[0040] The outlets of both the natural gas and oxygen pipelines are connected to the air pipeline, allowing the natural gas, oxygen, and air to be pre-mixed. Compared to directly entering the mixer, this pre-mixing method increases the contact area and mixing time of the natural gas, oxygen, and air, which is beneficial for forming a more uniform gas mixture in the mixer and making the gas mixture burn more completely. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0042] Figure 1 This is a schematic diagram of one embodiment of the present disclosure.

[0043] Figure 2 This is a schematic diagram of the connection structure of a natural gas pipeline, an oxygen pipeline, and an air pipeline in one embodiment of this disclosure.

[0044] In the diagram: 1. Mixer, 2. Air pipe, 3. Natural gas pipe, 4. Oxygen pipe, 5. Air filter, 6. Air pressure reducing valve, 7. First air control valve, 8. Second air control valve, 9. Three-way valve, 10. Air flow meter, 11. Oxygen filter, 12. Oxygen pressure reducing valve, 13. Oxygen control valve, 14. Oxygen flow meter, 15. Oxygen regulating valve, 16. Oxygen check valve, 17. Natural gas filter, 18. Natural gas pressure reducing valve, 19. Natural gas control valve, 20. Natural gas flow meter, 21. Natural gas regulating valve, 22. Natural gas check valve, 23. Flame arrester, 24. Shut-off valve, 25. Diverter plug, 26. Natural gas diverter port, 27. Oxygen diverter port. Detailed Implementation

[0045] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0046] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0047] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0048] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0050] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0051] like Figure 1 As shown, a natural gas-supported soot blowing device according to an embodiment of the present disclosure is illustrated, including a mixer 1, an air pipe 2, a natural gas pipe 3, and an oxygen pipe 4. The outlet end of the air pipe 2 is connected to the inlet of the mixer 1; the outlet end of the natural gas pipe 3 is connected to the air pipe 2; and the outlet end of the oxygen pipe 4 is connected to the air pipe 2.

[0052] Compared to directly mixing natural gas and air for pulse soot blowing, the addition of oxygen pipeline 4 in this embodiment is of great significance. On the one hand, oxygen itself has combustion-supporting properties; when mixed with natural gas and air, it ignites instantly during pulse soot blowing, enabling the mixed gas to burn at a higher temperature, which can greatly enhance the gas expansion energy. On the other hand, oxygen can improve the combustion reaction process, allowing the mixed gas to burn more completely, reducing energy waste and laying the foundation for subsequent efficient soot blowing.

[0053] The outlets of both the natural gas pipeline 3 and the oxygen pipeline 4 are connected to the air pipeline 2, allowing the natural gas, oxygen, and air to be pre-mixed. Compared to directly entering the mixer 1, this pre-mixing method increases the contact area and mixing time of the natural gas, oxygen, and air, which is beneficial for forming a more uniform gas mixture in the mixer 1 and making the gas mixture burn more completely.

[0054] Air duct 2, as the core airflow delivery channel, can continuously provide the initial power air source for mixer 1. Compressed air is delivered through air duct 2. The compressed air has a high pressure, which can make the mixed gas form a strong and comprehensive impact on the ash accumulation on the boiler heating surface during the soot blowing process, so that the ash accumulation on the boiler heating surface is thoroughly cleaned.

[0055] Adding air to the natural gas and oxygen mixture dilutes the oxygen concentration, making it less likely for the mixture to reach its explosive limits. This reduces the possibility of explosions and other safety accidents, improving the safety of the pulse soot blowing process. Air also acts as a buffer and regulator, slowing down the combustion rate and making the combustion process more stable. This contributes to a more uniform and continuous pulse soot blowing effect, avoiding problems such as uneven soot blowing intensity and poor localized soot blowing results caused by unstable combustion. Oxygen typically needs to be produced or purchased using specialized equipment, which is relatively expensive. Adding air to the mixture reduces the amount of oxygen used. By utilizing oxygen from the air to participate in the combustion reaction while maintaining soot blowing effectiveness, dependence on pure oxygen resources is reduced, lowering overall operating costs.

[0056] In some examples, an air filter 5 and an air pressure reducing valve 6 are also included, which are connected in series between the air filter 5 and the inlet end of the air duct 2.

[0057] For example, such as Figure 1 As shown, during use, the inlet of air filter 5 is connected to the air delivery equipment. Air passes through air filter 5 and enters air pressure reducing valve 6, then mixes with natural gas and oxygen before entering mixer 1. Filtering the air with air filter 5 prevents dust, impurities, and other particles from entering the subsequent piping system, avoiding wear and blockages to the boiler and ensuring optimal combustion of the mixed gas. Air pressure reducing valve 6 regulates the air pressure, stabilizing it within a suitable range before it enters the mixing stage. This prevents excessive pressure from causing damage to pipes, mixer 1, and other components due to excessive impact.

[0058] In some examples, there are two air pressure reducing valves 6 connected in series between the air filter 5 and the air duct 2. There is also a first air control valve 7 and a second air control valve 8 connected in series between the two air pressure reducing valves 6. One end of the second air control valve 8 is connected to the outlet end of the air pressure reducing valve 6 near the air filter 5, and the other end of the second air control valve 8 is connected to the outlet end of the other air pressure reducing valve 6.

[0059] For example, such as Figure 1 As shown, the right end of air duct 2 is connected to mixer 1. Two air pressure reducing valves 6 are connected in series between air filter 5 and air duct 2. A first air control valve 7 is connected in series between the two air pressure reducing valves 6. The first air control valve 7, after being connected in series with the right-side air pressure reducing valve 6, is then connected in parallel with the second air control valve 8. When the second air control valve 8 is opened and the first air control valve 7 is closed, the right-side air pressure reducing valve 6 is inactive, and the air pressure can be adjusted using the left-side air pressure reducing valve 6. When the second air control valve 8 is closed and the first air control valve 7 is opened, the two air pressure reducing valves 6 can be used to achieve staged pressure reduction, adapting to the diverse pressure requirements of soot blowing under different working conditions, ensuring stable and efficient system operation, and optimizing the formation and delivery of the mixed gas.

[0060] In some examples, a three-way valve 9 and an air flow meter 10 are also included. The two ports of the three-way valve 9 are connected between the outlet of the air pressure reducing valve 6, which is away from the air filter 5, and the inlet of the air duct 2; the air flow meter 10 is located on the third port of the three-way valve 9.

[0061] For example, such as Figure 1 As shown, the left and right ports of the three-way valve 9 are connected in series between the air duct 2 and the air pressure reducing valve 6 on the right. The three-way valve 9 provides the system with flexible air path switching functionality. It allows for changing the airflow direction, enabling multi-path distribution or selection, directing air to different branches as needed. This facilitates equipment debugging, maintenance, or air volume allocation according to the requirements of different soot blowing areas. An air flow meter 10 is installed on the third port of the three-way valve 9. Utilizing the flow measurement principle, it can monitor the passing airflow in real time, ensuring that the air supply meets the usage requirements.

[0062] In some examples, it also includes an oxygen filter 11, an oxygen pressure reducing valve 12, an oxygen control valve 13, and an oxygen flow meter 14. The inlet end of the oxygen pressure reducing valve 12 is connected to the outlet end of the oxygen filter 11; the oxygen control valve 13 is connected in series between the oxygen pressure reducing valve 12 and the inlet end of the oxygen pipeline 4; and the oxygen flow meter 14 is located between the outlet end of the oxygen pressure reducing valve 12 and the inlet end of the oxygen control valve 13.

[0063] For example, such as Figure 1As shown, when in use, the inlet end of the oxygen filter 11 is connected to the oxygen delivery equipment. After being filtered by the oxygen filter 11, the oxygen enters the oxygen pressure reducing valve 12, passes through the oxygen pressure reducing valve 12 and the oxygen control valve 13, and then enters the oxygen pipeline 4. Finally, it enters the mixer 1 through the air pipeline 2.

[0064] The oxygen filter 11 filters out impurities from the oxygen, preventing them from entering subsequent pipelines and affecting oxygen quality and combustion efficiency. The oxygen pressure reducing valve 12 reduces the pressure of high-pressure oxygen to a suitable level to meet the requirements of mixed combustion. The oxygen flow meter 14 measures the oxygen flow rate, and the oxygen control valve 13 controls the oxygen on / off state and flow rate. The oxygen flow meter 14 and the oxygen control valve 13 work together to precisely control the oxygen supply, ensuring complete and stable combustion. This enhances soot blowing energy, avoids oxygen waste, and improves soot blowing efficiency and economy.

[0065] In some examples, it also includes an oxygen regulating valve 15 and an oxygen check valve 16, with the outlet of the oxygen regulating valve 15 connected to the inlet of the oxygen filter 11; the oxygen check valve 16 is connected in series between the oxygen control valve 13 and the inlet of the oxygen pipeline 4.

[0066] For example, such as Figure 1 As shown, the oxygen regulating valve 15 can be used to adjust the amount of oxygen entering the system to adapt to the oxygen demand under different operating conditions and optimize combustion efficiency. The oxygen check valve 16 uses its one-way conduction characteristic to allow oxygen to flow only into the oxygen pipeline 4, which can prevent the gas in the oxygen pipeline 4 from flowing back, and can prevent the dangers of backfire, explosion and other hazards caused by the backflow of mixed gas, and can better ensure the safe and reliable operation of the entire soot blowing system.

[0067] In some examples, a natural gas filter 17, a natural gas pressure reducing valve 18, a natural gas control valve 19, and a natural gas flow meter 20 are also included. The inlet end of the natural gas pressure reducing valve 18 is connected to the outlet end of the natural gas filter 17; the natural gas control valve 19 is connected in series between the outlet end of the natural gas pressure reducing valve 18 and the inlet end of the natural gas pipeline 3; and the natural gas flow meter 20 is installed between the outlet end of the natural gas pressure reducing valve 18 and the inlet end of the natural gas control valve 19.

[0068] For example, such as Figure 1 As shown, when in use, the inlet end of the natural gas filter 17 is connected to the natural gas transmission equipment. After being filtered by the natural gas filter 17, the natural gas enters the natural gas pressure reducing valve 18, passes through the natural gas pressure reducing valve 18 and the natural gas control valve 19, and then enters the natural gas pipeline 3. Finally, it enters the mixer 1 through the air pipeline 2.

[0069] The natural gas filter 17 removes impurities from the natural gas, such as sulfide particles and moisture, preventing them from affecting combustion efficiency and promoting stable and efficient combustion. This reduces pollutant emissions, prevents boiler corrosion, and lowers equipment maintenance costs. The natural gas pressure reducing valve 18 reduces the pressure of the high-pressure natural gas to the required mixing range, ensuring stable mixing with oxygen and air. The natural gas flow meter 20 measures the natural gas flow rate, and the natural gas control valve 19 precisely regulates the on / off state and flow rate. The natural gas flow meter 20 and the natural gas control valve 19 are linked to precisely control the natural gas supply, optimize the mixing ratio, and improve soot blowing efficiency.

[0070] In some examples, a natural gas regulating valve 21 and a natural gas check valve 22 are also included. The outlet of the natural gas regulating valve 21 is connected to the inlet of the natural gas filter 17. The natural gas check valve 22 is connected in series between the natural gas control valve 19 and the inlet of the natural gas pipeline 3.

[0071] For example, such as Figure 1 As shown, the initial amount of natural gas entering the natural gas pipeline 3 can be controlled using the natural gas regulating valve 21 to adapt to changes in operating conditions, thereby saving energy and increasing efficiency. The natural gas check valve 22 can prevent backflow of gas in the natural gas pipeline 3, preventing backfire and thus improving the safety of equipment operation.

[0072] In some examples, a flame arrester 23 and a shut-off valve 24 are also included. The flame arrester 23 is connected in series between the natural gas control valve 19 and the natural gas check valve 22; the shut-off valve 24 is connected in series between the natural gas control valve 19 and the flame arrester 23.

[0073] For example, such as Figure 1 As shown, the flame arrester 23 can prevent backfire in the natural gas pipeline 3, better protecting equipment and personnel safety and ensuring the long-term stable operation of the natural gas soot blowing system under complex conditions. During equipment maintenance, repair, emergency handling, or process adjustments, the shut-off valve 24 can quickly cut off the natural gas supply, preventing safety accidents caused by natural gas leaks or misoperation. It also facilitates the maintenance and replacement of local equipment, better ensuring the reliability and stability of the entire soot blowing system.

[0074] In some examples, a diversion plug 25 is also included. The outlet ends of the natural gas pipeline 3 and the oxygen pipeline 4 extend into the air pipeline 2 and bend toward the inlet end of the air pipeline 2. A diversion plug 25 is provided at the outlet ends of the natural gas pipeline 3 and the oxygen pipeline 4. The diversion plug 25 is conical and its diameter gradually decreases from one end near the mixer 1 to the other end. The outlet end sidewall of the natural gas pipeline 3 has multiple natural gas diversion ports 26, and the outlet end sidewall of the oxygen pipeline 4 has multiple oxygen diversion ports 27.

[0075] For example, such as Figure 2 As shown, taking air pipeline 2 transporting air from left to right as an example, the outlet ends of natural gas pipeline 3 and oxygen pipeline 4 are both located inside air pipeline 2 and both bend to the left. The diameter of the diversion plug 25 gradually decreases from right to left. All natural gas diversion ports 26 are evenly arranged around natural gas pipeline 3, and all oxygen diversion ports 27 are evenly arranged around oxygen pipeline 4. After air encounters the diversion plug 25 on the left, it diffuses outwards along the side wall of the diversion plug 25, mixing with the oxygen flowing out of the oxygen diversion port 27. Then, after encountering the diversion plug 25 on the right, it diffuses outwards again along the side wall of the diversion plug 25, mixing with the natural gas flowing out of the natural gas diversion port 26. This increases the contact area between the gases and improves the premixing effect.

[0076] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A natural gas-supporting soot blowing device, characterized in that: include, Mixer (1) An air duct (2) is connected to the inlet of the mixer (1) at its outlet end. Natural gas pipeline (3), the outlet end of which is connected to the air pipeline (2); Oxygen pipe (4), the outlet end of which is connected to air pipe (2).

2. The natural gas-supporting soot blowing equipment according to claim 1, characterized in that: It also includes, Air filter (5) An air pressure reducing valve (6) is connected in series between the air filter (5) and the inlet end of the air duct (2).

3. A natural gas-supporting soot blowing device according to claim 2, characterized in that: The number of air pressure reducing valves (6) is two, and the two air pressure reducing valves (6) are connected in series between the air filter (5) and the air duct (2), and also include, The first air control valve (7) is connected in series between the two air pressure reducing valves (6); A second air control valve (8) is connected at one end to the outlet end of the air pressure reducing valve (6) near the air filter (5), and at the other end to the outlet end of another air pressure reducing valve (6).

4. A natural gas-supporting soot blowing device according to claim 3, characterized in that: It also includes, Three-way valve (9), the two ports of which are connected between the outlet end of the air pressure reducing valve (6) which is away from the air filter (5) and the inlet end of the air duct (2); An air flow meter (10) is installed on the third port of the three-way valve (9).

5. A natural gas-supporting soot blowing device according to claim 1, characterized in that: It also includes, Oxygen filter (11). An oxygen pressure reducing valve (12) is provided, the inlet of which is connected to the outlet of the oxygen filter (11). An oxygen control valve (13) is connected in series between the oxygen pressure reducing valve (12) and the inlet end of the oxygen pipeline (4); Oxygen flow meter (14) is disposed between the outlet end of the oxygen pressure reducing valve (12) and the inlet end of the oxygen control valve (13).

6. A natural gas-supporting soot blowing device according to claim 5, characterized in that: It also includes, An oxygen regulating valve (15) is provided, the outlet of which is connected to the inlet of the oxygen filter (11). An oxygen check valve (16) is connected in series between the oxygen control valve (13) and the inlet end of the oxygen pipeline (4).

7. A natural gas-supporting soot blowing device according to claim 1, characterized in that: It also includes, Natural gas filter (17). Natural gas pressure reducing valve (18), the inlet end of which is connected to the outlet end of the natural gas filter (17); Natural gas control valve (19), wherein the natural gas control valve (19) is connected in series between the outlet end of the natural gas pressure reducing valve (18) and the inlet end of the natural gas pipeline (3); Natural gas flow meter (20) is installed between the outlet end of the natural gas pressure reducing valve (18) and the inlet end of the natural gas control valve (19).

8. A natural gas-supporting soot blowing device according to claim 7, characterized in that: It also includes, Natural gas regulating valve (21), the outlet end of which is connected to the inlet end of natural gas filter (17); Natural gas check valve (22) is connected in series between the natural gas control valve (19) and the inlet end of the natural gas pipeline (3).

9. A natural gas-supporting soot blowing device according to claim 8, characterized in that: It also includes, A flame arrester (23) is connected in series between the natural gas control valve (19) and the natural gas check valve (22); A shut-off valve (24) is connected in series between the natural gas control valve (19) and the flame arrester (23).

10. A natural gas-supporting soot blowing device according to claim 1, characterized in that: It also includes a diversion plug (25). The outlet end of the natural gas pipeline (3) and the outlet end of the oxygen pipeline (4) extend into the air pipeline (2) and bend toward the inlet end of the air pipeline (2). The diversion plug (25) is provided at the outlet end of the natural gas pipeline (3) and the outlet end of the oxygen pipeline (4). The diversion plug (25) is conical. The diameter of the diversion plug (25) gradually decreases from one end near the mixer (1) to the other end. The outlet end sidewall of the natural gas pipeline (3) has multiple natural gas diversion ports (26), and the outlet end sidewall of the oxygen pipeline (4) has multiple oxygen diversion ports (27).

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