Combustion system and control method

Abstract

The invention relates to a combustion system and a control method in the technical field of combustion systems. The combustion system comprises a main gas supply pipeline system and a gas supply pipeline system which communicate with a combustor. The main gas supply pipeline system is used for providing first combustible gas and first combustion-supporting gas for the combustor, the gas supplementing pipeline system is used for providing second combustible gas and second combustion-supporting gas for the combustor, and the mixing cavity is arranged between the main gas supply pipeline system and the gas supplementing pipeline system in a communicating mode. High-pressure combustion-supporting gas or combustible gas is sprayed into the mixing cavity at a high speed through the gas supplementing pipeline system, strong turbulent jet flow is formed, the high-speed jet flow can entrain surrounding low-speed combustion-supporting gas or combustible gas with small concentration, forced mixing of gas flow is achieved within extremely short time, and the mixing efficiency is improved. Therefore, uniform and rapid gas supply is ensured, and the mixed gas in the combustor is combusted more fully.

Description

Technical Field

[0001] This invention relates to the field of combustion system technology, and in particular to a combustion system and control method. Background Technology

[0002] With the increase in global energy demand, especially the large-scale use of fossil fuels, more carbon dioxide and other pollutants are generated. Efficient combustion methods can not only help reduce pollutant emissions, but also improve energy utilization. However, although existing combustion systems can adjust the ratio of the gas mixture during combustion by regulating the flow rate, the long replenishment time makes it easy to miss the optimal time for replenishment, resulting in poor timeliness of replenishment and difficulty in effectively improving the combustion completeness of the gas mixture. Summary of the Invention

[0003] The technical problem to be solved by the present invention is that although the existing combustion system can adjust the ratio of the mixed gas during the combustion process by adjusting the flow rate, the compensation gas time is long, which makes it easy to miss the optimal time period for gas replenishment, resulting in poor timeliness of gas replenishment and difficulty in effectively improving the combustion completeness of the mixed gas. The present invention provides a combustion system and control method.

[0004] This invention aims to provide a combustion system, comprising:

[0005] Burner

[0006] The main gas supply pipeline system is used to supply the burner with a first combustible gas and a first combustion-supporting gas;

[0007] A gas supply pipeline system is used to provide the burner with a second combustible gas and a second combustion-supporting gas.

[0008] The mixing chamber is connected to the main gas supply pipeline system and the make-up gas pipeline system, and the mixing chamber is connected to the burner.

[0009] A gas concentration sensor is used to monitor the gas concentrations of the first combustible gas and the first combustion-supporting gas entering the burner. Based on the monitored gas concentrations, the gas supply volume of the gas replenishment pipeline system into the mixing chamber is controlled to adjust the gas ratio of the first combustible gas to the first combustion-supporting gas, thereby satisfying a preset combustion ratio.

[0010] In some embodiments, the main gas supply pipeline system includes a first gas supply pipeline and a second gas supply pipeline. The first gas supply pipeline is connected to the burner and is used to supply the burner with a first combustible gas. The second gas supply pipeline is connected to the burner and is used to supply the burner with a first combustion-supporting gas.

[0011] The gas supply pipeline system includes a first gas supply pipeline and a second gas supply pipeline. The first gas supply pipeline is connected to the burner and is used to provide the burner with a second combustible gas. The second gas supply pipeline is connected to the burner and is used to provide the burner with a second combustion-supporting gas.

[0012] The mixing chamber includes a first mixing chamber and a second mixing chamber. The first mixing chamber is disposed on the first gas supply pipeline and is connected to the first gas supply pipeline. The first gas replenishment pipeline is connected to the first mixing chamber through a first branch. The second mixing chamber is disposed on the second gas supply pipeline and is connected to the second gas supply pipeline. The second gas replenishment pipeline is connected to the second mixing chamber through a second branch.

[0013] In some embodiments, the gas concentration sensor includes a first gas concentration sensor and a second gas concentration sensor. The first gas concentration sensor is disposed at the connection between the first gas supply pipeline and the burner, and is used to monitor the concentration of combustible substances in the combustible gas entering the burner. The second gas concentration sensor is disposed at the connection between the second gas supply pipeline and the burner, and is used to monitor the concentration of combustion-supporting substances in the combustion-supporting gas entering the burner.

[0014] In some embodiments, control valves are provided on the first branch, the second branch, and the first gas supply line between the connection of the first branch and the connection of the burner, and on the second gas supply line between the connection of the second branch and the connection of the burner.

[0015] In some embodiments, the combustion system further includes a protective piping system connected to the burner for providing explosion-proof protective gas to the burner.

[0016] In some embodiments, a protective layer is provided on the outside of the burner, and a gas cavity is formed within the protective layer, which is filled with an explosion-proof protective gas.

[0017] In some embodiments, a control method for the above-described combustion system is provided, comprising:

[0018] Based on the monitoring data from the gas concentration sensor,

[0019] Control the flow rate and on / off state of the main gas supply pipeline system, and control the flow rate and on / off state of the make-up gas pipeline system.

[0020] In some embodiments, the method of monitoring data from the gas concentration sensor,

[0021] Controlling the flow rate and on / off state of the main gas supply pipeline system, and controlling the flow rate and on / off state of the make-up gas pipeline system, including:

[0022] Based on the actual ratio of the concentration of combustible substances in the first combustible gas to the concentration of combustion-supporting substances in the first combustion-supporting gas compared with the preset combustion ratio, it is determined whether the second combustible gas needs to be supplemented, or whether the second combustion-supporting gas needs to be supplemented, or whether the second combustible gas and the second combustion-supporting gas do not need to be supplemented.

[0023] If the actual ratio is greater than the preset combustion ratio, it is determined that the second combustion-supporting gas needs to be added, and the gas supply pipeline system is controlled to connect and inject the second combustion-supporting gas into the mixing chamber.

[0024] If the actual ratio is less than the preset combustion ratio, it is determined that the second combustible gas needs to be supplemented, and the gas supplementation pipeline system is controlled to connect and inject the second combustible gas into the mixing chamber.

[0025] If the actual ratio is equal to the preset combustion ratio, it is determined that there is no need to supplement the second combustible gas and the second combustion-supporting gas, and the gas supply pipeline system is controlled to be shut off.

[0026] Wherein, the concentration of combustible substances in the second combustible gas is greater than the concentration of combustible substances in the first combustible gas; and the concentration of combustion-supporting substances in the second combustion-supporting gas is greater than the concentration of combustion-supporting substances in the first combustion-supporting gas.

[0027] In some embodiments, the method of monitoring data from the gas concentration sensor,

[0028] Controlling the flow rate and on / off state of the main gas supply pipeline system, and controlling the flow rate and on / off state of the make-up gas pipeline system, including:

[0029] According to the preset combustion ratio, the gas supply pipeline system is controlled to supply the second combustible gas and the second combustion-supporting gas to the burner, and the main gas supply pipeline system is shut off.

[0030] Adjust the flow rate of the gas supply pipeline system so that the flow ratio of the second combustible gas and the second combustion-supporting gas meets the preset combustion ratio;

[0031] Wherein, the concentration of combustible substances in the second combustible gas is equal to the concentration of oxidizers in the second oxidizing gas.

[0032] In some embodiments, a control method for the above-described combustion system is provided, comprising:

[0033] The preset combustion ratio is calculated by comparing the actual ratio of the concentration of combustible substances in the first combustible gas to the concentration of combustion-supporting substances in the first combustion-supporting gas.

[0034] If the actual ratio is greater than the preset combustion ratio, it is determined that the second combustion-supporting gas needs to be supplemented, the second branch is connected and the second gas supply line is shut off, and the second combustion-supporting gas is injected into the second mixing chamber.

[0035] If the actual ratio is less than the preset combustion ratio, it is determined that the second combustible gas needs to be added, the first branch is connected and the first gas supply line is shut off, and the second combustible gas is injected into the first mixing chamber.

[0036] If the actual ratio is equal to the preset combustion ratio, it is determined that there is no need to supplement the second combustible gas and the second combustion-supporting gas, and the first branch, the first gas supply line, the second branch, and the second gas supply line are all shut off.

[0037] Wherein, the concentration of combustible substances in the second combustible gas is greater than the concentration of combustible substances in the first combustible gas; and the concentration of combustion-supporting substances in the second combustion-supporting gas is greater than the concentration of combustion-supporting substances in the first combustion-supporting gas.

[0038] In some embodiments, a control method for the above-described combustion system is provided, comprising:

[0039] The first gas supply line, the second gas supply line, the first branch line, and the second branch line are all shut off, while the first gas replenishment line and the second gas replenishment line are both connected.

[0040] Adjust the flow ratio of the first air supply line and the second air supply line to equal the preset combustion ratio;

[0041] Wherein, the concentration of combustible substances in the second combustible gas is equal to the concentration of oxidizers in the second oxidizing gas.

[0042] In some embodiments, the first combustible gas is designed to be natural gas;

[0043] The second combustible gas is designed to be: methane;

[0044] The first combustion-supporting gas is designed to be: air;

[0045] The second combustion-supporting gas is designed to be oxygen.

[0046] The solution provided by this invention has the following advantages compared with the prior art:

[0047] As needed, a gas supply method can be implemented by injecting a higher concentration of combustion-supporting gas or combustible gas into the mixing chamber, which then entrains a lower concentration of the same gas within the chamber. This, combined with increased flow rate, allows for high-pressure combustion-supporting gas or combustible gas to be injected at high speed into the mixing chamber through the gas supply pipeline system. This creates a strong turbulent jet, which entrains surrounding lower-concentration, slower-moving combustion-supporting gas or combustible gas, achieving forced mixing of the airflow in a very short time. By adjusting the injection rate of the combustion-supporting gas or combustible gas, the concentration of the gas within the mixing chamber can be precisely controlled. This on-demand gas supply mode replaces the direct oxygen supply method of injecting gas into the burner, avoiding the low utilization rate and poor oxygen supply effect caused by uneven oxygen entry into the burner. Combined with increased airflow in the main gas supply pipeline system, a negative pressure gradient is created in the mixing chamber, accelerating the diffusion and mixing of the jet within the chamber. Compared to single-gas regulation, the response speed of gas supply is significantly improved by the dual-pipeline coordinated regulation, ensuring uniform and rapid gas supply and more complete combustion of the mixed gas within the burner. Attached Figure Description

[0048] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0049] Figure 1 This is a schematic diagram of a combustion system shown in an embodiment of the present invention;

[0050] Figure 2 This is one of the combustion system flowcharts shown in the embodiments of the present invention;

[0051] Figure 3 This is the second flow chart of the combustion system shown in the embodiment of the present invention;

[0052] Figure 4 This is the third flow chart of the combustion system shown in the embodiment of the present invention;

[0053] Figure 5 This is the fourth flow chart of the combustion system shown in the embodiment of the present invention.

[0054] In the diagram: 1-burner, 201-first gas supply line, 202-second gas supply line, 301-first make-up gas line, 3011-first branch line, 302-second make-up gas line, 3021-second branch line, 401-first gas concentration sensor, 402-second gas concentration sensor, 501-first mixing chamber, 502-second mixing chamber, 6-protection piping system.

[0055] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0056] In the description of this invention, it should be noted that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this invention and simplifying the description, and do not 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 limiting this invention.

[0057] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "contact," and "communication" 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0058] Existing combustion systems can adjust the ratio of the gas mixture during combustion by regulating the flow rate, but due to the long replenishment time, they are prone to missing the optimal time for replenishment, resulting in poor timeliness of replenishment and difficulty in effectively improving the combustion completeness of the gas mixture.

[0059] Based on this, the following embodiments are proposed.

[0060] Example 1:

[0061] like Figure 1 As shown, this embodiment provides a combustion system, including:

[0062] Burner 1,

[0063] The main gas supply pipeline system is used to supply the burner 1 with a first combustible gas and a first combustion-supporting gas;

[0064] A gas supply pipeline system is used to provide the burner 1 with a second combustible gas and a second combustion-supporting gas.

[0065] The mixing chamber is connected to the main gas supply pipeline system and the make-up gas pipeline system, and the mixing chamber is connected to the burner 1.

[0066] A gas concentration sensor is used to monitor the gas concentration of the first combustible gas and the first combustion-supporting gas entering the burner 1. Based on the monitored gas concentration, the gas supply volume of the gas replenishment pipeline system into the mixing chamber is controlled to adjust the gas ratio of the first combustible gas to the first combustion-supporting gas to meet the preset combustion ratio.

[0067] In this embodiment, preferably, the first combustible gas is designed as natural gas; the second combustible gas is designed as methane; the first combustion-supporting gas is designed as air; and the second combustion-supporting gas is designed as oxygen. Natural gas and air are supplied to burner 1 via the main gas supply pipeline system. The burner ignites and burns. The chemical formula for methane combustion is: CH4 + 2O2 → CO2 + 2H2O. Therefore, the optimal ratio of methane to oxygen for combustion is 1:2. Natural gas is the primary combustible gas containing methane, and air is the primary combustion-supporting gas containing oxygen. By monitoring the concentration of combustible substances in the primary combustible gas (methane concentration in natural gas) and the concentration of combustion-supporting substances in the primary combustion-supporting gas (oxygen concentration in air), the optimal ratio of natural gas to air for combustion can be obtained. For example, if the oxygen concentration in air is 21% and the methane concentration in natural gas is 90%, the optimal ratio of natural gas to air for combustion (1:2) can be deduced to be 21:180, i.e., the preset combustion ratio is 21:180. Under normal conditions, this combustion system controls the main gas supply pipeline... The flow rate of the combustion system is controlled to maintain a ratio of 21:180 between the supply of the first combustible gas and the first oxidizing gas, ensuring relatively complete combustion of the gas mixture within the combustion system. However, during the gas supply process, incomplete combustion may occur because the concentrations of natural gas and air cannot remain consistently stable. By monitoring the concentration of combustible substances in the first combustible gas and the concentration of oxidizing substances in the first oxidizing gas using gas concentration sensors in the combustion system, the actual ratio of combustible substances and oxidizing substances in the two gases can be obtained. If the actual ratio of combustible substance methane to oxidizing substance oxygen is not equal to 1:2, the actual ratio of combustible substance methane to oxidizing substance oxygen can be adjusted by adjusting the flow rate and on / off state of the main gas supply pipeline system and the flow rate and on / off state of the make-up gas pipeline system, so that the ratio approaches 1:2 infinitely, ensuring complete combustion of the gas mixture within burner 1.

[0068] For example, if the actual ratio of combustible methane to combustion-supporting oxygen is greater than the preset combustion ratio of 1:2, it is determined that the second combustion-supporting gas oxygen needs to be supplemented. The second combustion-supporting gas oxygen is injected into the mixing chamber through the gas injection pipeline system. The injected oxygen quickly entrains the air in the mixing chamber, and the air and oxygen quickly reach a uniform mixing state. They are then input into the burner 1 through the main gas supply pipeline system. The injected oxygen increases the oxygen concentration in the air in the mixing chamber. At the same time, by increasing the air flow rate in the main gas supply pipeline system, the above-mentioned gas injection method of entraining mixed air by oxygen jet and increasing flow rate can be achieved. By injecting high-pressure oxygen into the mixing chamber at high speed through the gas injection pipeline system, a strong turbulent jet is formed. According to the principle of fluid mechanics, the high-speed jet will entrain the surrounding low-speed air (Venturi effect), achieving forced mixing of airflow in a very short time (millisecond level). By adjusting the oxygen injection amount, the oxygen concentration in the mixing chamber can be precisely controlled (for example, from 21% to 23%~30%). This on-demand oxygen replenishment mode replaces the method of directly inputting pure oxygen into burner 1, avoiding the situation where the oxygen entering burner 1 is uneven, resulting in low utilization and poor oxygen replenishment effect.

[0069] By increasing the airflow in the main gas supply pipeline system, a negative pressure gradient is created in the mixing chamber, accelerating the diffusion and mixing of the oxygen jet. Compared to single-gas regulation, the response speed of oxygen replenishment is significantly improved by coordinating the two pipelines. This ensures uniform and rapid oxygen replenishment and more complete combustion of the mixed gas in burner 1.

[0070] Similarly, if the actual ratio is less than the preset combustion ratio, it is determined that the second combustible gas needs to be supplemented. The gas supply pipeline system is then connected to inject the second combustible gas into the mixing chamber. The second combustible gas oxygen is injected into the mixing chamber through the gas supply pipeline system. The methane injected into the mixing chamber quickly entrains the natural gas in the mixing chamber, and the methane and natural gas quickly reach a uniform mixing state. They are then input into the burner 1 through the main gas supply pipeline system. The injected methane increases the methane concentration in the natural gas in the mixing chamber. At the same time, by increasing the air flow in the main gas supply pipeline system, the above-mentioned gas supply method of entraining the mixed natural gas with the methane jet and increasing the flow can be achieved. By injecting high-pressure methane into the mixing chamber at high speed through the gas supply pipeline system, a strong turbulent jet is formed. According to the principle of fluid mechanics, the high-speed jet will entrain the surrounding low-speed natural gas (Venturi effect), achieving forced mixing of the airflow in a very short time (millisecond level). By adjusting the amount of methane injected, the increase in the methane concentration in the mixing chamber can be precisely controlled. This on-demand methane replenishment mode replaces the method of directly inputting pure methane into burner 1, avoiding the situation where the utilization rate of methane entering burner 1 is low and the replenishment effect is poor due to uneven methane input.

[0071] By increasing the natural gas flow rate in the main gas supply pipeline system, a negative pressure gradient is created in the mixing chamber, accelerating the diffusion and mixing of the natural gas jet. Compared to single-gas regulation, the response speed of dual-pipeline coordinated regulation can be significantly improved. This ensures uniform and rapid gas replenishment and more complete combustion of the mixed gas in burner 1.

[0072] Optionally, in one implementation of this embodiment, such as Figure 1 As shown,

[0073] The main gas supply pipeline system includes a first gas supply pipeline 201 and a second gas supply pipeline 202. The first gas supply pipeline 201 is connected to the burner 1 and is used to supply the burner 1 with a first combustible gas. The second gas supply pipeline 202 is connected to the burner 1 and is used to supply the burner 1 with a first combustion-supporting gas.

[0074] The gas supply pipeline system includes a first gas supply pipeline 301 and a second gas supply pipeline 302. The first gas supply pipeline 301 is connected to the burner 1 and is used to provide the burner 1 with a second combustible gas. The second gas supply pipeline 302 is connected to the burner 1 and is used to provide the burner 1 with a second combustion-supporting gas.

[0075] The mixing chamber includes a first mixing chamber 501 and a second mixing chamber 502. The first mixing chamber 501 is disposed on and connected to the first gas supply line 201. The first gas replenishment line 301 is connected to the first mixing chamber 501 through a first branch line 3011. The second mixing chamber 502 is disposed on and connected to the second gas supply line 202. The second gas replenishment line 302 is connected to the second mixing chamber 502 through a second branch line 3021.

[0076] Furthermore, the gas concentration sensor includes a first gas concentration sensor 401 and a second gas concentration sensor 402. The first gas concentration sensor 401 is disposed at the connection between the first gas supply pipeline 201 and the burner 1, and is used to monitor the concentration of combustible substances in the combustible gas entering the burner 1. The second gas concentration sensor 402 is disposed at the connection between the second gas supply pipeline 202 and the burner 1, and is used to monitor the concentration of combustion-supporting substances in the combustion-supporting gas entering the burner 1.

[0077] More specifically, control valves are provided on the first branch 3011, the second branch 3021, and the first gas supply line 301 between the connection of the first branch 3011 and the connection of the burner 1, and on the second gas supply line 302 between the connection of the second branch 3021 and the connection of the burner 1.

[0078] In this embodiment, the concentration of combustible substances in the first combustible gas (i.e., the concentration of methane in natural gas) is monitored by the first gas concentration sensor 401, and the concentration of combustion-supporting substances in the first combustion-supporting gas (i.e., the concentration of oxygen in air) is monitored by the second gas concentration sensor 402. This allows for the determination of the optimal ratio of natural gas to air for combustion. For example, if the oxygen concentration in air is 21% and the methane concentration in natural gas is 90%, and the optimal ratio of methane to oxygen for combustion is 1:2, then the optimal ratio of natural gas to air for combustion is 21:180. Under normal conditions, by controlling the flow rate of the main gas supply pipeline system and maintaining the ratio of the supply of the first combustible gas to the supply of the first combustion-supporting gas at 21:180, the relatively complete combustion of the gas mixture within the combustion system can be ensured. However, during gas supply... During the process, since the concentrations of natural gas and air cannot remain consistently stable, incomplete combustion may occur. By using two gas concentration sensors in the combustion system to monitor the concentrations of combustible substances in the first combustible gas and the concentrations of combustion-supporting substances in the first combustion-supporting gas, the actual ratio of combustible substances and combustion-supporting substances in the two gases can be obtained. If the actual ratio of combustible substance methane to combustion-supporting substance oxygen is not equal to 1:2, the actual ratio of combustible substance methane to combustion-supporting substance oxygen can be adjusted by adjusting the flow rate and on / off state of the first gas supply line 201 and the second gas supply line 202, and by adjusting the flow rate and on / off state of the first gas replenishment line 301 and the second gas replenishment line 302, so that the ratio approaches 1:2 infinitely, ensuring complete combustion of the mixed gas in the burner 1.

[0079] For example, if the actual ratio of combustible methane to oxidizing oxygen is greater than the preset combustion ratio of 1:2, it is determined that the second oxidizing gas oxygen needs to be supplemented. This is done by connecting the second branch 3021 and shutting off the second gas supply line 302, injecting the second oxidizing gas oxygen into the second mixing chamber 502. The injected oxygen quickly entrains the air in the second mixing chamber 502, rapidly achieving a uniform mixture. Both are then fed into the burner 1 through the second gas supply line 202. The injected oxygen further enhances the uniformity of the air in the second mixing chamber 502. The oxygen concentration is increased, and simultaneously, by increasing the air flow rate in the second air supply line 202, the aforementioned air replenishment method, which involves the synergistic increase of air flow rate and oxygen jet entrainment for mixing, can be achieved. High-pressure oxygen is injected at high speed into the mixing chamber through the air replenishment line system, forming a strong turbulent jet. According to fluid dynamics principles, the high-speed jet entrains surrounding low-speed air (Venturi effect), achieving forced mixing of the airflow in a very short time (milliseconds). By adjusting the oxygen injection volume, the oxygen concentration within the second mixing chamber 502 can be precisely controlled (e.g., increased from 21% to 23%–30%). This on-demand oxygen replenishment mode replaces the method of directly inputting pure oxygen into the burner 1, avoiding the situation where uneven oxygen entry into the burner 1 leads to low utilization and poor oxygen replenishment effect.

[0080] By increasing the airflow in the second gas supply line 202, a negative pressure gradient is created in the mixing chamber, accelerating the diffusion and mixing of the oxygen jet. Compared to single-gas regulation, the response speed of oxygen replenishment is significantly improved by the coordinated regulation of the two lines. This ensures uniform and rapid oxygen replenishment and more complete combustion of the mixed gas in burner 1.

[0081] Similarly, if the actual ratio is less than the preset combustion ratio, it is determined that the second combustible gas needs to be supplemented, and the gas supply pipeline system is controlled to inject the second combustible gas into the mixing chamber; by connecting the first branch 3011 and shutting off the first gas supply pipeline 301, the second combustible gas is injected into the first mixing chamber 501. The methane injected into the first mixing chamber 501 quickly entrains the natural gas in the first mixing chamber 501, and the methane and natural gas quickly reach a uniform mixing state, and are then input into the burner 1 through the first gas supply pipeline 201. The injected methane makes the first mixture... The methane concentration in the natural gas within the mixing chamber 501 is increased. Simultaneously, by increasing the air flow rate in the first gas supply line 201, the aforementioned gas replenishment method—which involves the methane jet entraining and mixing of natural gas in synergy with the increased flow rate—can be achieved. High-pressure methane is injected at high speed into the first mixing chamber 501 through the first gas replenishment line 301, forming a strong turbulent jet. According to fluid mechanics principles, this high-speed jet entrains surrounding low-speed natural gas (Venturi effect), achieving forced mixing of the airflow in a very short time (milliseconds). By adjusting the methane injection rate, the increase in methane concentration within the first mixing chamber 501 can be precisely controlled. This on-demand methane replenishment mode replaces the method of directly inputting pure methane into the burner 1, avoiding the low utilization rate and poor replenishment effect caused by uneven methane entry into the burner 1.

[0082] By increasing the natural gas flow rate in the first gas supply pipeline 201, a negative pressure gradient is created in the first mixing chamber 501, accelerating the diffusion and mixing of the natural gas jet. Compared to single-gas regulation, the response speed of dual-pipeline coordinated regulation can be significantly improved. This ensures uniform and rapid gas replenishment and more complete combustion of the mixed gas in the burner 1.

[0083] Optionally, in one implementation of this embodiment, such as Figure 1 As shown,

[0084] The combustion system further includes a protective piping system 6, which is connected to the burner 1 and is used to provide explosion-proof protective gas to the burner 1.

[0085] In this embodiment, the explosion-proof protective gas can be nitrogen. The fundamental reason why methane and oxygen explode within burner 1 is that the mixture reaches its explosive limits and encounters an ignition source. By using nitrogen for explosion protection, nitrogen is supplied to burner 1 through the protective pipeline system 6. This dilutes the oxygen concentration within burner 1, isolates combustible materials from contact with oxygen, and absorbs the heat of reaction, thus destroying the necessary conditions for an explosion.

[0086] Alternatively, in one implementation of this embodiment,

[0087] The burner 1 is provided with a protective layer on the outside, and a gas cavity is formed inside the protective layer, which is filled with explosion-proof protective gas.

[0088] In this embodiment, by providing a protective layer on the outside of the burner 1, the mixed gas inside the burner 1 can be diluted in a timely manner when there are cracks on the outer wall of the burner 1, thereby avoiding dangerous situations more promptly.

[0089] Example 2

[0090] like Figure 2 As shown, this embodiment provides a control method for a combustion system according to Embodiment 1, including:

[0091] Based on the monitoring data from the gas concentration sensor,

[0092] Control the flow rate and on / off state of the main gas supply pipeline system, and control the flow rate and on / off state of the make-up gas pipeline system.

[0093] In this embodiment, the processor controls the flow rate and on / off status of each pipeline in the combustion system;

[0094] For example: the processor receives monitoring data from the first gas concentration sensor 401 and the second gas concentration sensor 402, compares the actual ratio of the concentration of combustible substances in the first combustible gas to the concentration of combustion-supporting substances in the first combustion-supporting gas, and determines that the second combustible gas needs to be supplemented. It then controls the gas supply pipeline system to connect and inject the second combustible gas into the mixing chamber; controls the first branch 3011 to connect and controls the first gas supply pipeline 301 to close, injecting the second combustible gas into the first mixing chamber 501. The methane injected into the first mixing chamber 501 rapidly entrains the natural gas in the first mixing chamber 501, and the methane and natural gas quickly mix. In a uniform state, methane is injected into the burner 1 through the first gas supply line 201. The injected methane increases the methane concentration in the natural gas within the first mixing chamber 501. Simultaneously, by increasing the airflow rate in the first gas supply line 201, the aforementioned gas replenishment method—involving the methane jet entraining and mixing of natural gas with the increased airflow—can be achieved. High-pressure methane is injected at high speed into the first mixing chamber 501 through the first gas replenishment line 301, forming a strong turbulent jet. According to fluid dynamics principles, the high-speed jet entrains surrounding low-speed natural gas (Venturi effect), achieving forced mixing of the airflow in a very short time (milliseconds). By adjusting the methane injection rate, the increase in methane concentration within the first mixing chamber 501 can be precisely controlled. This on-demand methane replenishment mode replaces the direct injection of pure methane into the burner 1, avoiding the low utilization rate and poor replenishment effect caused by uneven methane entry into the burner 1.

[0095] By coordinating with the control of the increased natural gas flow in the first gas supply pipeline 201, a negative pressure gradient is formed in the first mixing chamber 501, accelerating the diffusion and mixing of the natural gas jet. Compared with single-gas regulation, the response speed of dual-pipeline coordinated regulation can be significantly improved. This ensures uniform and rapid gas replenishment and more complete combustion of the mixed gas in burner 1.

[0096] Optionally, in one implementation of this embodiment, such as Figure 2 , 3 As shown,

[0097] The monitoring data from the gas concentration sensor,

[0098] Controlling the flow rate and on / off state of the main gas supply pipeline system, and controlling the flow rate and on / off state of the make-up gas pipeline system, including:

[0099] Based on the actual ratio of the concentration of combustible substances in the first combustible gas to the concentration of combustion-supporting substances in the first combustion-supporting gas compared with the preset combustion ratio, it is determined whether the second combustible gas needs to be supplemented, or whether the second combustion-supporting gas needs to be supplemented, or whether the second combustible gas and the second combustion-supporting gas do not need to be supplemented.

[0100] If the actual ratio is greater than the preset combustion ratio, it is determined that the second combustion-supporting gas needs to be added, and the gas supply pipeline system is controlled to connect and inject the second combustion-supporting gas into the mixing chamber.

[0101] If the actual ratio is less than the preset combustion ratio, it is determined that the second combustible gas needs to be supplemented, and the gas supplementation pipeline system is controlled to connect and inject the second combustible gas into the mixing chamber.

[0102] If the actual ratio is equal to the preset combustion ratio, it is determined that there is no need to supplement the second combustible gas and the second combustion-supporting gas, and the gas supply pipeline system is controlled to be shut off.

[0103] Wherein, the concentration of combustible substances in the second combustible gas is greater than the concentration of combustible substances in the first combustible gas; and the concentration of combustion-supporting substances in the second combustion-supporting gas is greater than the concentration of combustion-supporting substances in the first combustion-supporting gas.

[0104] Furthermore, this embodiment provides a control method for a combustion system, including:

[0105] Qi replenishment mode;

[0106] The gas replenishment mode includes: determining whether to replenish the second combustible gas, or to replenish the second combustion-supporting gas, or to determine whether to replenish the second combustible gas and the second combustion-supporting gas, based on the actual ratio of the concentration of combustible substances in the first combustible gas to the concentration of combustion-supporting substances in the first combustion-supporting gas compared with the preset combustion ratio.

[0107] If the actual ratio is greater than the preset combustion ratio, it is determined that the second combustion-supporting gas needs to be supplemented, and the second branch 3021 is connected and the second gas supply line 302 is closed, and the second combustion-supporting gas is injected into the second mixing chamber 502.

[0108] If the actual ratio is less than the preset combustion ratio, it is determined that the second combustible gas needs to be supplemented. The first branch 3011 is connected and the first gas supply line 301 is closed, and the second combustible gas is injected into the first mixing chamber 501.

[0109] If the actual ratio is equal to the preset combustion ratio, it is determined that there is no need to supplement the second combustible gas and the second combustion-supporting gas, and the first branch 3011, the first gas supply line 301, the second branch 3021 and the second gas supply line 302 are all shut off.

[0110] In this embodiment, before controlling the combustion system to ignite, the control method of the combustion system obtains whether each pipeline in the combustion system is sealed to ensure system safety. If any pipeline is not sealed, the processor is fed back fault information and the processor controls the combustion system to cancel its operation.

[0111] If all pipelines are in a sealed state, then based on the actual ratio of the concentration of combustible substances in the first combustible gas to the concentration of combustion-supporting substances in the first combustion-supporting gas compared with the preset combustion ratio, it is determined whether a second combustible gas or a second combustion-supporting gas needs to be added, or whether a second combustible gas or a second combustion-supporting gas does not need to be added.

[0112] Taking the following example, the first combustible gas is designed as natural gas; the second combustible gas is designed as methane; the first combustion-supporting gas is designed as air; and the second combustion-supporting gas is designed as oxygen: The chemical formula for methane combustion is CH4 + 2O2 → CO2 + 2H2O. Therefore, the optimal ratio of methane to oxygen for combustion is 1:2. Natural gas is the first combustible gas containing methane, and air is the first combustion-supporting gas containing oxygen. By monitoring the concentration of combustible substances in the first combustible gas (methane concentration in natural gas) and the concentration of combustion-supporting substances in the first combustion-supporting gas (oxygen concentration in air) using a gas concentration sensor, the optimal ratio of natural gas to air for combustion can be obtained. For example, if the oxygen concentration in air is 21% and the methane concentration in natural gas is 90%, the optimal ratio of natural gas to air for combustion can be deduced from the optimal ratio of 1:2. This combustion system operates under normal conditions... By controlling the flow rate of the main gas supply pipeline system, the ratio of the supply of the first combustible gas to the supply of the first combustion-supporting gas is controlled to 21:180, which ensures relatively complete combustion of the mixed gas in the combustion system. However, during the gas supply process, since the concentrations of natural gas and air cannot remain continuously stable, incomplete combustion may occur. By monitoring the concentration of combustible substances in the first combustible gas and the concentration of combustion-supporting substances in the first combustion-supporting gas through the gas concentration sensor in the combustion system, the actual ratio of combustible substances and combustion-supporting substances in the two gases can be obtained. If the actual ratio of combustible substance methane to combustion-supporting substance oxygen is not equal to the preset combustion ratio of 1:2, the actual ratio of combustible substance methane to combustion-supporting substance oxygen can be adjusted by adjusting the flow rate and on / off state of the main gas supply pipeline system and the flow rate and on / off state of the make-up gas pipeline system, so that the ratio approaches 1:2 infinitely, ensuring complete combustion of the mixed gas in burner 1.

[0113] When the actual ratio of combustible methane to combustion-supporting oxygen is greater than the preset combustion ratio of 1:2, it is determined that the second combustion-supporting gas oxygen needs to be supplemented. The second combustion-supporting gas oxygen is injected into the mixing chamber through the gas supply pipeline system. The injected oxygen quickly entrains the air in the mixing chamber, and the air and oxygen quickly reach a uniform mixing state. They are then input into the burner 1 through the main gas supply pipeline system. The injected oxygen increases the oxygen concentration in the air in the mixing chamber. At the same time, by increasing the air flow rate in the main gas supply pipeline system, the above-mentioned gas supply method of oxygen jet entraining mixed air and increasing flow rate can be achieved. By injecting high-pressure oxygen into the mixing chamber at high speed through the gas supply pipeline system, a strong turbulent jet is formed. According to the principle of fluid mechanics, the high-speed jet will entrain the surrounding low-speed air (Venturi effect), and the forced mixing of airflow is achieved in a very short time (millisecond level). By adjusting the oxygen injection amount, the oxygen concentration in the mixing chamber can be precisely controlled (for example, from 21% to 23%~30%). This on-demand oxygen replenishment mode replaces the method of directly inputting pure oxygen into burner 1, avoiding the situation where the oxygen entering burner 1 is uneven, resulting in low utilization and poor oxygen replenishment effect.

[0114] By increasing the airflow in the main gas supply pipeline system, a negative pressure gradient is created in the mixing chamber, accelerating the diffusion and mixing of the oxygen jet. Compared to single-gas regulation, the response speed of oxygen replenishment is significantly improved by coordinating the two pipelines. This ensures uniform and rapid oxygen replenishment and more complete combustion of the mixed gas in burner 1.

[0115] When the actual ratio is less than the preset combustion ratio, it is determined that the second combustible gas needs to be supplemented. The gas supply pipeline system is then connected to inject the second combustible gas into the mixing chamber. The second combustible gas oxygen is injected into the mixing chamber through the gas supply pipeline system. The methane injected into the mixing chamber quickly entrains the natural gas in the mixing chamber, and the methane and natural gas quickly reach a uniform mixing state. They are then input into the burner 1 through the main gas supply pipeline system. The injected methane increases the methane concentration in the natural gas in the mixing chamber. At the same time, by increasing the air flow in the main gas supply pipeline system, the above-mentioned gas supply method of entraining the mixed natural gas with the methane jet and increasing the flow can be achieved. By injecting high-pressure methane into the mixing chamber at high speed through the gas supply pipeline system, a strong turbulent jet is formed. According to the principle of fluid mechanics, the high-speed jet will entrain the surrounding low-speed natural gas (Venturi effect), achieving forced mixing of the airflow in a very short time (millisecond level). By adjusting the amount of methane injected, the increase in the methane concentration in the mixing chamber can be precisely controlled. This on-demand methane replenishment mode replaces the method of directly inputting pure methane into burner 1, avoiding the situation where the utilization rate of methane entering burner 1 is low and the replenishment effect is poor due to uneven methane input.

[0116] By increasing the natural gas flow rate in the main gas supply pipeline system, a negative pressure gradient is created in the mixing chamber, accelerating the diffusion and mixing of the natural gas jet. Compared to single-gas regulation, the response speed of dual-pipeline coordinated regulation can be significantly improved. This ensures uniform and rapid gas replenishment and more complete combustion of the mixed gas in burner 1.

[0117] For each increase of 1 in the actual proportionality coefficient, oxygen needs to be added to system 2 in the same proportion. When the oxygen concentration:methane concentration equals 2, no gas compensation is required. The concentration changes are continuously monitored and coefficient compensation is performed in real time.

[0118] For example, if the actual ratio of combustible methane to oxidizing oxygen is greater than the preset combustion ratio of 1:2, it is determined that the second oxidizing gas oxygen needs to be supplemented. The second branch 3021 is connected, and the second gas supply line 302 is closed. The second oxidizing gas oxygen is injected into the second mixing chamber 502. The injected oxygen quickly entrains the air in the second mixing chamber 502, and the air and oxygen quickly reach a uniform mixture state. Both are then input into the burner 1 through the second gas supply line 202. The injected oxygen causes the air in the second mixing chamber 502 to... The oxygen concentration is increased, and by increasing the air flow rate in the second air supply line 202, the aforementioned air replenishment method, which combines oxygen jet entrainment with increased air flow, can be achieved. High-pressure oxygen is injected at high speed into the mixing chamber through the air replenishment line system, forming a strong turbulent jet. According to fluid dynamics principles, the high-speed jet entrains surrounding low-speed air (Venturi effect), achieving forced mixing of the airflow in a very short time (milliseconds). By adjusting the oxygen injection volume, the oxygen concentration in the second mixing chamber 502 can be precisely controlled (e.g., increased from 21% to 23%–30%). This on-demand oxygen replenishment mode replaces the method of directly inputting pure oxygen into the burner 1, avoiding the situation where uneven oxygen entry into the burner 1 leads to low utilization and poor oxygen replenishment effect.

[0119] By coordinating with the increased airflow in the second gas supply line 202, a negative pressure gradient is created in the mixing chamber, accelerating the diffusion and mixing of the oxygen jet. Compared to single-gas regulation, the response speed of oxygen replenishment is significantly improved by the coordinated regulation of the two lines. This ensures uniform and rapid oxygen replenishment and more complete combustion of the mixed gas in burner 1.

[0120] Similarly, if the actual ratio is less than the preset combustion ratio, it is determined that the second combustible gas needs to be supplemented. The gas supply pipeline system is then connected to inject the second combustible gas into the mixing chamber. By controlling the connection of the first branch 3011 and the disconnection of the first gas supply pipeline 301, the second combustible gas is injected into the first mixing chamber 501. The methane injected into the first mixing chamber 501 rapidly entrains the natural gas within it, and the methane and natural gas quickly reach a homogeneous mixture. Both are then input into the burner 1 through the first gas supply pipeline 201. The injected methane... The methane concentration in the natural gas within the first mixing chamber 501 is increased. Simultaneously, the air flow rate in the first gas supply line 201 is controlled and increased. This gas replenishment method, which involves the methane jet entraining and mixing of natural gas in synergy with the increased air flow rate, can be achieved. By injecting high-pressure methane at high speed into the first mixing chamber 501 through the first gas replenishment line 301, a strong turbulent jet is formed. According to fluid mechanics principles, the high-speed jet entrains the surrounding low-speed natural gas (Venturi effect), achieving forced mixing of the airflow in a very short time (milliseconds). By adjusting the methane injection rate, the increase in methane concentration within the first mixing chamber 501 can be precisely controlled. This on-demand methane replenishment mode replaces the method of directly inputting pure methane into the burner 1, avoiding the situation where the methane entering the burner 1 is uneven, resulting in low utilization and poor replenishment effect.

[0121] By coordinating with the control of the increased natural gas flow in the first gas supply pipeline 201, a negative pressure gradient is formed in the first mixing chamber 501, accelerating the diffusion and mixing of the natural gas jet. Compared with single-gas regulation, the response speed of dual-pipeline coordinated regulation can be significantly improved. This ensures uniform and rapid gas replenishment and more complete combustion of the mixed gas in burner 1.

[0122] Example 3

[0123] like Figure 4 As shown, based on the monitoring data from the gas concentration sensor,

[0124] Controlling the flow rate and on / off state of the main gas supply pipeline system, and controlling the flow rate and on / off state of the make-up gas pipeline system, including:

[0125] According to the preset combustion ratio, the gas supply pipeline system is controlled to supply the second combustible gas and the second combustion-supporting gas to the burner 1, and the main gas supply pipeline system is shut off.

[0126] Adjust the flow rate of the gas supply pipeline system so that the flow ratio of the second combustible gas and the second combustion-supporting gas meets the preset combustion ratio;

[0127] Wherein, the concentration of combustible substances in the second combustible gas is equal to the concentration of oxidizers in the second oxidizing gas.

[0128] Furthermore, this embodiment provides a control method for a combustion system, including:

[0129] Direct control mode;

[0130] Control the first gas supply line 201, the second gas supply line 202, the first branch line 3011 and the second branch line 3021 to shut off, and connect the first gas supply line 301 and the second gas supply line 302.

[0131] Adjust the flow ratio of the first air supply line 301 and the second air supply line 302 to be equal to the preset combustion ratio;

[0132] Wherein, the concentration of combustible substances in the second combustible gas is equal to the concentration of oxidizers in the second oxidizing gas.

[0133] In this embodiment, when the concentrations of combustible substances in the first combustible gas and the concentrations of combustion-supporting substances in the first combustion-supporting gas are in a relatively unstable fluctuating state, the gas replenishment mode will result in frequent adjustments. In this case, a direct control mode can be used, that is, shutting off the first gas supply line 201, the second gas supply line 202, the first branch line 3011, and the second branch line 3021; ​​connecting the first gas replenishment line 301 and the second gas replenishment line 302; and adjusting the flow ratio of the first gas replenishment line 301 and the second gas replenishment line 302 to be equal to the preset value. The combustion ratio is achieved by replacing the first combustible gas and the first combustion-supporting gas with a second combustible gas and a second combustion-supporting gas, which are directly input into burner 1. For example, the second combustible gas is methane and the second combustion-supporting gas is oxygen. Since the concentration of combustible substances in methane is 100% and the concentration of combustion-supporting substances in oxygen is 100%, the flow rates of both are set according to the preset combustion ratio to ensure that the actual ratio of the two is close to the preset combustion ratio, thus achieving efficient combustion. The direct control mode is easier to control the ratio of combustible substances and combustion-supporting substances compared to the supplementary gas mode, but the raw material cost is high.

[0134] In summary, the ingenious design of the combustion system lies in:

[0135] As needed, a gas supply method can be implemented by injecting a higher concentration of combustion-supporting gas or combustible gas into the mixing chamber, which then entrains a lower concentration of the same gas within the chamber. This, combined with increased flow rate, allows for high-pressure combustion-supporting gas or combustible gas to be injected at high speed into the mixing chamber through the gas supply pipeline system. This creates a strong turbulent jet, which entrains surrounding lower-concentration, slower-moving combustion-supporting gas or combustible gas, achieving forced mixing of the airflow in a very short time. By adjusting the injection rate of the combustion-supporting gas or combustible gas, the concentration of the gas within the mixing chamber can be precisely controlled. This on-demand gas supply mode replaces the direct oxygen supply method of injecting gas into the burner, avoiding the low utilization rate and poor oxygen supply effect caused by uneven oxygen entry into the burner. Combined with increased airflow in the main gas supply pipeline system, a negative pressure gradient is created in the mixing chamber, accelerating the diffusion and mixing of the jet within the chamber. Compared to single-gas regulation, the response speed of gas supply is significantly improved by the dual-pipeline coordinated regulation, ensuring uniform and rapid gas supply and more complete combustion of the mixed gas within the burner.

[0136] It can be further understood that in this disclosure, "multiple" refers to two or more, and other quantifiers are similar. "And / or" describes the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The singular forms "a," "the," and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0137] It is further understood that the terms "first," "second," etc., are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another, and do not indicate a specific order or degree of importance. In fact, the expressions "first," "second," etc., are completely interchangeable. For example, without departing from the scope of this disclosure, first information can also be referred to as second information, and similarly, second information can also be referred to as first information.

[0138] It is further understood that although operations are described in a specific order in the accompanying drawings in the embodiments of this disclosure, this should not be construed as requiring these operations to be performed in the specific order or serial order shown, or requiring all of the shown operations to be performed to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0139] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims of this application.

[0140] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A combustion system, characterized in that, include: Burner (1), The main gas supply pipeline system is used to supply the burner (1) with a first combustible gas and a first combustion-supporting gas; A gas supply pipeline system is used to provide a second combustible gas and a second combustion-supporting gas to the burner (1); The mixing chamber is connected to the main gas supply pipeline system and the make-up gas pipeline system, and the mixing chamber is connected to the burner (1). A gas concentration sensor is used to monitor the gas concentration of the first combustible gas and the first combustion-supporting gas entering the burner (1), and to control the gas flow rate of the gas supply pipeline system into the mixing chamber according to the monitored gas concentration, thereby adjusting the gas ratio of the first combustible gas to the first combustion-supporting gas to meet the preset combustion ratio.

2. The combustion system according to claim 1, characterized in that, The main gas supply pipeline system includes a first gas supply pipeline (201) and a second gas supply pipeline (202). The first gas supply pipeline (201) is connected to the burner (1) and is used to supply the burner (1) with a first combustible gas. The second gas supply pipeline (202) is connected to the burner (1) and is used to supply the burner (1) with a first combustion-supporting gas. The gas supply pipeline system includes a first gas supply pipeline (301) and a second gas supply pipeline (302). The first gas supply pipeline (301) is connected to the burner (1) and is used to provide the burner (1) with a second combustible gas. The second gas supply pipeline (302) is connected to the burner (1) and is used to provide the burner (1) with a second combustion-supporting gas. The mixing chamber includes a first mixing chamber (501) and a second mixing chamber (502). The first mixing chamber (501) is disposed on the first gas supply pipeline (201) and is connected to the first gas supply pipeline (201). The first gas replenishment pipeline (301) is connected to the first mixing chamber (501) through a first branch (3011). The second mixing chamber (502) is disposed on the second gas supply pipeline (202) and is connected to the second gas supply pipeline (202). The second gas replenishment pipeline (302) is connected to the second mixing chamber (502) through a second branch (3021).

3. The combustion system according to claim 2, characterized in that, The gas concentration sensor includes a first gas concentration sensor (401) and a second gas concentration sensor (402). The first gas concentration sensor (401) is located at the connection between the first gas supply line (201) and the burner (1) and is used to monitor the concentration of combustible substances in the combustible gas entering the burner (1). The second gas concentration sensor (402) is located at the connection between the second gas supply line (202) and the burner (1) and is used to monitor the concentration of combustion-supporting substances in the combustion-supporting gas entering the burner (1).

4. The combustion system according to claim 2, characterized in that, Control valves are provided on the first branch (3011), the second branch (3021), and the first gas supply line (301) between the connection of the first branch (3011) and the connection of the burner (1), and on the second gas supply line (302) between the connection of the second branch (3021) and the connection of the burner (1).

5. The combustion system according to claim 1, characterized in that, The combustion system further includes a protective pipeline system (6), which is connected to the burner (1) and is used to provide explosion-proof protective gas to the burner (1).

6. The combustion system according to claim 1, characterized in that, The burner (1) is provided with a protective layer on the outside, and a gas cavity is formed in the protective layer, which is filled with explosion-proof protective gas.

7. A control method for a combustion system as described in any one of claims 1-6, characterized in that, include: Based on the monitoring data from the gas concentration sensor, Control the flow rate and on / off state of the main gas supply pipeline system, and control the flow rate and on / off state of the make-up gas pipeline system.

8. The control method for the combustion system according to claim 7, characterized in that, The monitoring data from the gas concentration sensor, Controlling the flow rate and on / off state of the main gas supply pipeline system, and controlling the flow rate and on / off state of the make-up gas pipeline system, including: Based on the actual ratio of the concentration of combustible substances in the first combustible gas to the concentration of combustion-supporting substances in the first combustion-supporting gas compared with the preset combustion ratio, it is determined whether the second combustible gas needs to be supplemented, or whether the second combustion-supporting gas needs to be supplemented, or whether the second combustible gas and the second combustion-supporting gas do not need to be supplemented. If the actual ratio is greater than the preset combustion ratio, it is determined that the second combustion-supporting gas needs to be added, and the gas supply pipeline system is controlled to connect and inject the second combustion-supporting gas into the mixing chamber. If the actual ratio is less than the preset combustion ratio, it is determined that the second combustible gas needs to be supplemented, and the gas supplementation pipeline system is controlled to connect and inject the second combustible gas into the mixing chamber. If the actual ratio is equal to the preset combustion ratio, it is determined that there is no need to supplement the second combustible gas and the second combustion-supporting gas, and the gas supply pipeline system is shut off. Wherein, the concentration of combustible substances in the second combustible gas is greater than the concentration of combustible substances in the first combustible gas; and the concentration of combustion-supporting substances in the second combustion-supporting gas is greater than the concentration of combustion-supporting substances in the first combustion-supporting gas.

9. The control method for the combustion system according to claim 7, characterized in that, The monitoring data from the gas concentration sensor, Controlling the flow rate and on / off state of the main gas supply pipeline system, and controlling the flow rate and on / off state of the make-up gas pipeline system, including: According to the preset combustion ratio, the gas supply pipeline system is controlled to supply the second combustible gas and the second combustion-supporting gas to the burner (1), and the main gas supply pipeline system is shut off; Adjust the flow rate of the gas supply pipeline system so that the flow ratio of the second combustible gas and the second combustion-supporting gas meets the preset combustion ratio; Wherein, the concentration of combustible substances in the second combustible gas is equal to the concentration of oxidizers in the second oxidizing gas.

10. A control method for a combustion system as described in claim 4, characterized in that, include: The preset combustion ratio is calculated by comparing the actual ratio of the concentration of combustible substances in the first combustible gas to the concentration of combustion-supporting substances in the first combustion-supporting gas. If the actual ratio is greater than the preset combustion ratio, it is determined that the second combustion-supporting gas needs to be supplemented, and the second branch (3021) is connected and the second gas supply line (302) is closed, and the second combustion-supporting gas is injected into the second mixing chamber (502); If the actual ratio is less than the preset combustion ratio, it is determined that the second combustible gas needs to be supplemented. The first branch (3011) is connected and the first gas supply line (301) is closed. The second combustible gas is injected into the first mixing chamber (501). If the actual ratio is equal to the preset combustion ratio, it is determined that there is no need to supplement the second combustible gas and the second combustion-supporting gas, and the first branch (3011), the first gas supply line (301), the second branch (3021) and the second gas supply line (302) are all shut off. Wherein, the concentration of combustible substances in the second combustible gas is greater than the concentration of combustible substances in the first combustible gas; and the concentration of combustion-supporting substances in the second combustion-supporting gas is greater than the concentration of combustion-supporting substances in the first combustion-supporting gas.

11. A control method for a combustion system as described in claim 4, characterized in that, include: The first gas supply line (201), the second gas supply line (202), the first branch line (3011) and the second branch line (3021) are all shut off, while the first gas replenishment line (301) and the second gas replenishment line (302) are both connected. Adjust the flow ratio of the first air supply line (301) and the second air supply line (302) to be equal to the preset combustion ratio; Wherein, the concentration of combustible substances in the second combustible gas is equal to the concentration of oxidizers in the second oxidizing gas.

12. The control method for the combustion system according to any one of claims 7-11, characterized in that, The first combustible gas is designed to be: natural gas; The second combustible gas is designed to be: methane; The first combustion-supporting gas is designed to be: air; The second combustion-supporting gas is designed to be oxygen.

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