Combustion system

Abstract

The utility model discloses a combustion system which comprises a combustion device. The main fuel gas pipeline is used for conveying fuel gas to the combustion device; the ignition pipeline is used for conveying fuel gas to an igniter of the combustion device during ignition; the first combustion-supporting air pipeline is used for conveying combustion-supporting air to the igniter during ignition; the second combustion-supporting air pipeline is used for conveying combustion-supporting air to the combustion device under a normal working condition, and the second combustion-supporting air pipeline and the first combustion-supporting air pipeline respectively form independent pipelines and are connected with the combustion device; according to the combustion system disclosed by the embodiment of the invention, combustion-supporting air can be provided by adopting an independent pipeline according to ignition requirements during ignition, and the combustion system is convenient to operate and debug and high in safety.

Description

Technical Field

[0001] The present application relates to the technical field of waste gas treatment, and in particular to a combustion system. Background Art

[0002] Existing combustion systems face a series of challenges and safety risks during installation and commissioning. In particular, these systems rely on the coordination of large-volume combustion air ducts and ignition ducts under normal operating conditions to ignite the initial small flame and provide a fire source for the entire combustion system, which not only increases the complexity of the commissioning and installation process, but also introduces many safety hazards, posing additional challenges to commissioning personnel. Utility Model Content

[0003] The purpose of the present application includes, for example, providing a combustion system that can use a separate pipeline to provide combustion-supporting air according to ignition needs during ignition, which is convenient for operation and debugging and has high safety.

[0004] According to the embodiment of the present application, the combustion system includes a combustion device; a main gas pipeline for conveying gas to the combustion device; an ignition pipeline for conveying gas to the igniter of the combustion device during ignition; a first combustion-supporting air pipeline for conveying combustion-supporting air to the igniter during ignition; a second combustion-supporting air pipeline for conveying combustion-supporting air to the combustion device under normal operating conditions, the second combustion-supporting air pipeline and the first combustion-supporting air pipeline are respectively formed as independent pipelines and are both connected to the combustion device; and a compressed air pipeline for conveying compressed air to the combustion device for cooling.

[0005] According to the combustion system of the embodiment of the present application, by providing a first combustion-supporting air pipeline and a second combustion-supporting air pipeline, independent pipelines can be used to provide combustion-supporting air under ignition and normal operating conditions, respectively. On the one hand, the combustion-supporting air demand during normal combustion and ignition can be ensured respectively, and on the other hand, the first combustion-supporting air pipeline can directly deliver the combustion-supporting air volume suitable for ignition needs, and there is no need to adjust the large volume of combustion-supporting air under normal operating conditions to match the ignition demand of small volume, which is convenient for operation and debugging, and can also improve safety during ignition. The compressed air pipeline is used to deliver compressed air to the combustion device for cooling, wherein the compressed air pipeline can be connected to the compressed air provided by the plant for cooling the combustion device, for example, it can be used to cool the furnace body, burner or other components of the combustion device, etc., to ensure the safe operation and high efficiency of the combustion system.

[0006] According to some embodiments of the present application, the combustion system further includes a mixer, the ignition pipeline and the first combustion-supporting air pipeline are both connected to the mixer, and are connected to the igniter through the mixer. The mixer can ensure that the combustion-supporting air and the fuel gas are mixed in a suitable ratio, thereby ensuring the safety of ignition and the success rate of ignition.

[0007] According to some embodiments of the present application, the first combustion-supporting air pipeline is provided with a first control valve, a pressure-regulating filter, a first regulating valve and a first pressure gauge in sequence, the first control valve is used to control the on-off of the first combustion-supporting air pipeline, the first regulating valve is used to regulate the flow of the first combustion-supporting air pipeline, the first pressure gauge is used to measure the pressure of the first combustion-supporting air pipeline, and the pressure-regulating filter is used to filter and regulate the pressure of the first combustion-supporting air pipeline. Thus, by filtering and regulating the pressure, the combustion-supporting air finally provided to the ignition pipeline can be both dry and clean, and the pressure is accurate, which can greatly improve the success rate of ignition and the life of the igniter.

[0008] According to some embodiments of the present application, the pressure regulating filter element includes a first filter and a first pressure regulating valve, the first filter is used to filter the combustion-supporting air flowing through the first combustion-supporting air pipeline, and the first pressure regulating valve is used to adjust the pressure of the first combustion-supporting air pipeline.

[0009] According to some embodiments of the present application, the compressed air pipeline is provided with a second control valve and a pressure regulating and filtering dual-joint in sequence, wherein the second control valve is used to control the on-off of the compressed air pipeline, and the pressure regulating and filtering dual-joint is used to regulate and filter the compressed air flowing through the compressed air pipeline. This ensures the quality of the compressed air and prevents the compressed air with unstable pressure and moisture from entering the combustion device, thereby affecting the service life of the combustion device.

[0010] According to some embodiments of the present application, the second combustion-supporting air pipeline is provided with a combustion-supporting air fan, a proportional valve, a third control valve, and a second pressure gauge in sequence, wherein the proportional valve is used to adjust the combustion-supporting air volume entering the combustion device, the third control valve is used to control the on-off of the second combustion-supporting air pipeline, and the second pressure gauge is used to detect the outlet pressure of the proportional valve. Thus, the outlet pressure loss of the proportional valve can be effectively detected according to the second pressure gauge, and the opening of the proportional valve and the on-off of the entire second combustion-supporting air pipeline can be controlled through program interlocking.

[0011] According to some embodiments of the present application, the combustion system further includes a combustion-supporting air bypass pipeline, one end of which is connected to the second combustion-supporting air pipeline and connected between the combustion-supporting fan and the proportional valve, and the other end of which is connected to the combustion device for cooling. The combustion-supporting air of the second combustion-supporting pipeline can partially flow to the combustion-supporting air bypass pipeline for cooling, so that the excess combustion-supporting air can be effectively utilized and the utilization rate can be improved.

[0012] According to some embodiments of the present application, the main gas pipeline is provided with a fourth control valve, a second filter, a pressure reducing assembly and a pressure control assembly in sequence, wherein the second filter is used to filter the gas in the main gas pipeline, the pressure reducing assembly is used to adjust and detect the pressure of the main gas pipeline, and the pressure control assembly is used to detect the pressure of the main gas pipeline and control the on-off of the main gas pipeline according to the pressure. This can prevent gas with impurities from entering the combustion device and affecting the ignition effect, and can also adjust and stabilize the gas pressure of the main gas pipeline to prevent pressure instability from causing safety hazards and equipment damage.

[0013] According to some embodiments of the present application, the combustion system further includes at least one of the following:

[0014] (1) The decompression assembly includes a third pressure gauge, a first pressure reducing valve and a fourth pressure gauge which are arranged in sequence. The third pressure gauge is used to detect the outlet pressure of the second filter, the first pressure reducing valve is used to adjust the pressure of the main gas pipeline, and the fourth pressure gauge is used to detect the pressure of the main gas pipeline after decompression. Thus, the outlet pressure of the second filter can be detected to effectively monitor whether the second filter is clogged and the clogged condition, and the pressure of the main gas pipeline can be adjusted to keep it within a stable and safe pressure range.

[0015] (2) The pressure control assembly includes a low-pressure switch, a safety control valve and a high-pressure switch, which are arranged in sequence. The low-pressure switch is provided with a preset minimum pressure value and is used to monitor whether the pressure of the main gas pipeline is lower than the preset minimum pressure value. The high-pressure switch is provided with a preset maximum pressure value and is used to monitor whether the pressure of the main gas pipeline is higher than the preset maximum pressure value. The safety control valve is used to control the on-off of the main gas pipeline according to the monitoring results of the low-pressure switch and the high-pressure switch. This can prevent the pressure of the main gas pipeline from being too high or too low, and respond to the safety system to perform safety operations when the pressure exceeds the preset range.

[0016] According to some embodiments of the present application, the ignition pipeline is provided with a fifth control valve, a second pressure reducing valve, an ignition pressure switch and a fifth pressure gauge in sequence, the second pressure reducing valve is used to adjust the pressure of the ignition pipeline, the ignition pressure switch is used to monitor the outlet pressure of the second pressure reducing valve and respond to the safety control system, and the fifth pressure gauge is used to detect the outlet pressure of the second pressure reducing valve. Thus, the pressure of the ignition pipeline is controlled to be stable within a suitable range, and when the pressure exceeds the suitable range, the pressure out-of-range information is transmitted to the safety control system to improve the stability and safety of the combustion system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the structure of a combustion system according to an embodiment of the present application.

[0019] Reference numerals:

[0020] 100: Combustion system;

[0021] 10: Main gas pipeline, 11: Fourth control valve, 12: Second filter, 13: Pressure reducing assembly, 131: Third pressure gauge, 132: First pressure reducing valve, 133: Fourth pressure gauge, 14: Pressure control assembly, 141: Low pressure switch, 142: Safety control valve, 143: High pressure switch, 15: Proportional regulating valve, 16: Pressure gauge after proportional valve, 17: Manual ball valve;

[0022] 20: ignition pipeline, 21: fifth control valve, 22: second pressure reducing valve, 23: ignition pressure switch, 24: fifth pressure gauge, 25: solenoid valve, 26: pressure gauge after solenoid valve, 27: manual control valve;

[0023] 30: first combustion-supporting air pipeline, 31: first control valve, 32: first filter, 33: first pressure regulating valve, 34: first regulating valve, 35: first pressure gauge;

[0024] 40: second combustion-supporting air pipeline, 41: combustion-supporting fan, 42: combustion-supporting air bypass pipeline, 43: proportional valve, 44: third control valve, 45: second pressure gauge, 46: combustion-supporting air outlet pressure gauge;

[0025] 50: compressed air pipeline, 51: second control valve, 52: pressure regulating and filtering two-piece;

[0026] 60: mixer;

[0027] 70: Combustion device. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, it is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0032] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0033] It should be noted that, in the absence of conflict, the features in the embodiments of the present application may be combined with each other.

[0034] A combustion system 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0035] like Figure 1 As shown, according to an embodiment of the present application, the combustion system 100 includes a combustion device 70, a first combustion-supporting air pipeline 30, a second combustion-supporting air pipeline 40, an ignition pipeline 20, a compressed air pipeline 50 and a main gas pipeline 10, and the first combustion-supporting air pipeline 30, the second combustion-supporting air pipeline 40, the ignition pipeline 20, the compressed air pipeline 50 and the main gas pipeline 10 are all connected to the combustion device 70.

[0036] Specifically, the main gas pipeline 10 is connected to the combustion device 70 for conveying gas to the combustion device 70, and the ignition pipeline 20 is used to convey gas to the igniter of the combustion device 70 during ignition. The gas may be natural gas, liquefied petroleum gas, etc., wherein the main gas pipeline 10 connects the gas supply source and the combustion device 70, and is mainly used to convey gas to the combustion device 70 under normal working conditions for combustion, so as to ensure a stable and continuous supply of gas and ensure the efficiency and safety of the combustion process. The ignition pipeline 20 can be formed as a branch of the main gas pipeline 10, and the gas portion of the main gas pipeline 10 flows to the ignition pipeline 20 to convey gas to the igniter of the combustion device 70 during ignition, for example, to provide an ignition source when performing an ignition operation for the first time or when restarting the system, so as to start the combustion process of the main gas.

[0037] Regarding the setting of the ignition pipeline 20, in some examples, the ignition pipeline 20 can be formed as an independent pipeline, so as to adjust the gas volume according to the ignition demand; in other examples, the ignition pipeline 20 can be led out from the main gas pipeline 10 to form a branch of the main gas pipeline 10, such as Figure 1 As shown, both ends of the ignition pipeline 20 are connected to the main gas pipeline 10 and the combustion device 70 respectively, so there is no need to set up additional connecting pipelines, the structure is simple and the connection is convenient.

[0038] The first combustion-supporting air duct 30 is used to deliver combustion-supporting air to the igniter during ignition, and the second combustion-supporting air duct 40 is arranged in parallel with the first combustion-supporting air duct 30, so as to deliver combustion-supporting air to the combustion device 70 under normal operating conditions. Specifically, the first combustion-supporting air duct 30 and the second combustion-supporting air duct 40 are respectively formed as independent ducts and are both connected to the combustion device 70, that is, the first combustion-supporting air duct 30 and the second combustion-supporting air duct 40 are respectively connected to a combustion-supporting air source and the combustion device 70, wherein the combustion-supporting air delivered by the first combustion-supporting air duct 30 and the second combustion-supporting air duct 40 may come from the same combustion-supporting air source, for example, the same quality of combustion-supporting air is selected, and the two combustion-supporting air ducts are independently arranged, and the two combustion-supporting air ducts may be connected to the same combustion-supporting air source through different fans. In another embodiment, the two combustion-supporting air ducts may be independently arranged without affecting each other, and the combustion-supporting air may come from different combustion-supporting air sources, for example, combustion-supporting air of different qualities may be selected. Furthermore, the first combustion-supporting air duct 30 is used for ignition and has a small demand, so high-quality combustion-supporting air may be selected to increase the ignition rate, and the second combustion-supporting air duct 40 has a large demand for combustion-supporting air, so low-quality combustion-supporting air may be selected to reduce costs.

[0039] The first combustion-supporting air duct 30 is mainly used to provide combustion-supporting air for the igniter during ignition, and the second combustion-supporting air duct 40 is mainly used to provide combustion-supporting air for the combustion of the combustion device 70 under normal operating conditions. The combustion-supporting air volume required for normal combustion is relatively large, while the combustion-supporting air volume required for ignition is relatively small. If the second combustion-supporting air duct 40 under normal operating conditions is used in conjunction with the ignition duct 20 to ignite an initial small flame to provide a fire source, the combustion-supporting air supply is too large, while the gas supply is significantly small. In this case, it will be extremely difficult to achieve a suitable combustion-supporting air intake volume only by adjusting the proportional valve, which will not only increase the complexity of the debugging and installation process, but also easily introduce many safety hazards, which is also very difficult for the debugging personnel. The combustion system 100 of the embodiment of the utility model adopts independent pipelines to provide combustion-supporting air under ignition and normal operating conditions respectively. On the one hand, it can ensure the combustion-supporting air demand during normal combustion and ignition respectively. On the other hand, the first combustion-supporting air pipeline 30 can directly deliver the combustion-supporting air volume suitable for ignition needs. There is no need to adjust the combustion-supporting air intake volume to a large extent under normal operating conditions, which is convenient for operation and debugging, and can also improve the safety during ignition.

[0040] It should be noted that the normal working condition in the embodiment of the utility model refers to other working conditions except the ignition. The combustion-supporting wind can be air or other oxidants such as oxygen to promote combustion and ensure sufficient and efficient combustion. Furthermore, the combustion-supporting wind can be compressed air.

[0041] The compressed air pipeline 50 is used to deliver compressed air to the combustion device 70 for cooling. Specifically, the compressed air pipeline 50 can be connected to the compressed air provided by the factory to cool the combustion device 70. For example, it can be used to cool the furnace body, burner or other components of the combustion device 70 to ensure the safe operation and high efficiency of the combustion system 100.

[0042] In some embodiments of the present application, Figure 1 As shown, the combustion system 100 of the embodiment of the present application may also include a mixer 60, and the ignition pipeline 20 and the first combustion-supporting air pipeline 30 are both connected to the mixer 60 and connected to the igniter through the mixer 60, so that the combustion-supporting air delivered by the first combustion-supporting air pipeline 30 and the fuel gas delivered by the ignition pipeline 20 can be mixed through the mixer 60 and then delivered to the igniter. The mixer 60 can ensure that the combustion-supporting air and the fuel gas are mixed in a suitable proportion, thereby ensuring the safety of ignition and the success rate of ignition.

[0043] like Figure 1 As shown, the first combustion-supporting air pipeline 30 is provided with a first control valve 31 and a pressure-regulating filter in sequence. The first control valve 31 is used to control the on-off of the first combustion-supporting air pipeline 30, and the pressure-regulating filter is used to filter and regulate the pressure of the first combustion-supporting air pipeline 30, thereby providing high-quality and pressure-stable combustion-supporting air for ignition, so as to improve the ignition success rate.

[0044] In some examples, the pressure regulating filter element may include a first filter 32 and a first pressure regulating valve 33. The first filter 32 is used to filter the combustion-supporting air flowing through the first combustion-supporting air duct 30, and the first pressure regulating valve 33 is used to adjust the pressure of the first combustion-supporting air duct 30 so that the combustion-supporting air in the first combustion-supporting air duct 30 is maintained within a suitable and stable pressure range. The first filter 32 can filter out moisture and impurities in the combustion-supporting air, and then the first pressure regulating valve 33 can accurately adjust the pipeline pressure. In this way, the combustion-supporting air finally provided to the ignition pipeline 20 can be dry and clean, and the pressure is accurate through filtering and pressure regulation, which can greatly improve the success rate of ignition and the life of the igniter. In addition, the quality of the combustion-supporting air (compressed air) required for ignition is relatively high. The first combustion-supporting air duct 30 of the combustion system 100 of the present application can use two components, a filter and a pressure regulating valve, respectively, without the need to use an integral pressure regulating and filtering two-piece, which can also reduce costs.

[0045] The inventor has discovered through research that the ignition pipeline of the combustion system in the related technology relies on a combustion-supporting air pipeline with a large air volume under normal operating conditions to ignite the initial small flame and provide a fire source for the entire combustion system. The specific combustion system includes a branch pipeline and a main pipeline for providing combustion-supporting air under normal operating conditions. The branch pipeline is a branch of the main pipeline, that is, a branch pipeline is led out from the main pipeline to provide combustion-supporting air for ignition. However, the amount of combustion-supporting air used under normal operating conditions does not need to be filtered and pressure-regulated, and the quality of the combustion-supporting air can be relatively poor to reduce costs. The combustion-supporting air provided to the ignition pipeline not only makes it easy for impurities to be generated in the combustion-supporting air, affecting the ignition success rate, but also the initial flow rate of the main pipeline is large and difficult to adjust. In the present application, a separate combustion-supporting air pipeline is used for ignition, which can not only provide high-quality combustion-supporting air, but also filter and pressure-regulate the combustion-supporting air to further improve the quality of the combustion-supporting air, reduce the ignition failure rate, and increase the service life of the combustion device 70.

[0046] like Figure 1 As shown, the first combustion-supporting air pipeline 30 is also provided with a first regulating valve 34 and a first pressure gauge 35. The first regulating valve 34 is used to regulate the flow rate of the first combustion-supporting air pipeline 30, and the first pressure gauge 35 is used to measure the pressure of the first combustion-supporting air pipeline 30. Specifically, the first regulating valve 34 can be a butterfly valve, and the first pressure gauge 35 is used to detect the pressure after the butterfly valve adjusts the flow rate, wherein the first regulating valve 34 and the first pressure gauge 35 are respectively arranged between the first pressure regulating valve 33 and the mixer 60. After the combustion-supporting air is filtered and pressure-regulated, the first regulating valve 34 is used to accurately adjust the pressure, thereby providing more stable and appropriate combustion-supporting air for ignition, so as to improve the ignition success rate and increase the service life.

[0047] like Figure 1As shown, the compressed air pipeline 50 is provided with a second control valve 51 and a pressure regulating and filtering two-piece component 52 in sequence. The second control valve 51 is used to control the on-off of the compressed air pipeline 50, and the pressure regulating and filtering two-piece component 52 is used to filter and regulate the pressure of the compressed air in the compressed air pipeline 50. Thus, by regulating and filtering the compressed air, the humidity and pressure of the compressed air can be ensured, the quality of the compressed air can be improved, and the unstable and humid compressed air can be prevented from entering the combustion device 70 to affect the service life of the combustion device 70.

[0048] like Figure 1 As shown, the second combustion-supporting air pipeline 40 is provided with a combustion-supporting fan 41, a proportional valve 43, a third control valve 44 and a second pressure gauge 45 in sequence. The combustion-supporting fan 41 is used to provide power for the delivery of the combustion-supporting air, the proportional valve 43 is used to adjust the amount of the combustion-supporting air entering the combustion device 70, the third control valve 44 is used to control the on-off of the second combustion-supporting air pipeline 40, and the second pressure gauge 45 is used to detect the outlet pressure of the proportional valve 43, thereby the pressure loss at the outlet of the proportional valve 43 can be effectively detected according to the first pressure gauge 45, and the opening of the proportional valve 43 and the on-off of the entire second combustion-supporting air pipeline 40 can be controlled through program interlocking. The third control valve 44 can be a manual valve, for example, a manual butterfly valve, so that the butterfly valve can be manually opened and closed, making maintenance and emergency handling faster and more effective.

[0049] like Figure 1 As shown, the second combustion-supporting air pipeline 40 is also provided with a combustion-supporting fan outlet pressure gauge 46 for detecting the outlet pressure value of the combustion-supporting fan 41. The outlet of the combustion-supporting fan 41 can be softly connected to the pipeline, and the soft connection can be made of non-woven fabric, thereby reducing vibration transmission.

[0050] In some embodiments of the present application, the combustion system 100 may further include a combustion-supporting air bypass line 42, one end of which is connected to the second combustion-supporting air line 40 and is connected between the combustion-supporting fan 41 and the proportional valve 43, and the other end of the combustion-supporting air bypass line 42 can be connected to the combustion device 70 for cooling. That is, a portion of the combustion-supporting air delivered by the combustion-supporting fan 41 can flow to the combustion device 70 to promote combustion, and a portion can flow to the combustion-supporting air bypass line 42 and flow to the combustion device 70 for cooling, so that excess combustion-supporting air can be effectively utilized and the utilization rate can be improved. For example, the combustion-supporting air in the combustion-supporting air bypass line 42 can be used to provide a cooling air source for sight glasses, etc., so that there is no need for additional external compressed air.

[0051] like Figure 1As shown, the main gas pipeline 10 is provided with a fourth control valve 11, a second filter 12, a pressure reducing assembly 13 and a pressure control assembly 14 in sequence. The second filter 12 is used to filter the gas in the main gas pipeline 10 to prevent impurities from entering the combustion device 70 and affecting the ignition and combustion effects. Optionally, the second filter 12 can be a Y-shaped filter.

[0052] The pressure reducing assembly 13 is used to adjust and detect the pressure of the main gas pipeline 10, so as to adjust and stabilize the gas pressure of the main gas pipeline 10 to ensure stability and efficiency. The pressure control assembly 14 is used to detect the pressure of the main gas pipeline 10 and control the on and off of the main gas pipeline 10 according to the pressure, so as to prevent the pressure from being unstable and causing safety hazards, such as preventing the pressure from being too low and causing incomplete combustion or flameout, and preventing the pressure from being too high and causing equipment damage or other safety problems.

[0053] In such Figure 1 In the example shown, the pressure reducing assembly 13 may include a third pressure gauge 131, a first pressure reducing valve 132 and a fourth pressure gauge 133 which are arranged in sequence. The third pressure gauge 131 is used to detect the outlet pressure of the second filter 12. According to the detection result, it can effectively detect whether the second filter 12 is blocked and the blocking condition, so as to prevent the poor filtering effect or the normal delivery of the gas caused by the blockage of the second filter 12. The first pressure reducing valve 132 is used to adjust the pressure of the main gas pipeline 10, reduce and stabilize the pressure of the main gas pipeline 10, so that the pressure of the main gas pipeline 10 is in a stable and appropriate pressure range to ensure stability and safety; the fourth pressure gauge 133 is used to detect the pressure of the main gas pipeline 10 after pressure reduction, so as to detect whether the gas pressure meets the standard after filtering and pressure reduction.

[0054] like Figure 1 As shown, the pressure control component 14 includes a low-pressure switch 141, a safety control valve 142, and a high-pressure switch 143 which are arranged in sequence. The low-pressure switch 141 is provided with a preset minimum pressure value and is used to monitor whether the pressure of the main gas pipeline 10 is lower than the preset minimum pressure value. The high-pressure switch 143 is provided with a preset maximum pressure value and is used to detect whether the pressure of the main gas pipeline 10 is higher than the preset maximum pressure value. The safety control valve 142 is used to control the on-off of the main gas pipeline 10 according to the monitoring results of the low-pressure switch 141 and the high-pressure switch 143.

[0055] Specifically, the low-pressure switch 141 has a minimum preset pressure safety lower limit value, i.e., a preset minimum pressure value. If the pressure is too low, such as lower than the preset minimum pressure value, the low-pressure switch 141 will be triggered and will respond to the safety control system to start the combustion system 100 safety program, such as executing the operation of shutting down some or all components of the combustion system 100 to prevent incomplete combustion or flameout of the combustion device 70; the high-pressure switch 143 has a maximum preset pressure safety upper limit value, i.e., a preset maximum pressure value, to monitor whether the pressure of the main gas pipeline 10 exceeds the safety upper limit. High pressure may cause equipment damage or other safety problems. If the pressure of the main gas pipeline 10 is too high, such as higher than the preset maximum pressure value, the high-pressure switch 143 will be triggered and start the combustion system 100 safety program, and take necessary safety measures, such as shutting down the combustion device 70 or cutting off the gas supply, to protect the combustion system 100 from the harm of excessive pressure.

[0056] In this way, by using the high-pressure switch 143, the low-pressure switch 141 and the safety control valve 142 in coordination, it is possible to ensure that the combustion system 100 operates within a safe pressure range. If the pressure exceeds the normal pressure range, the high-pressure switch 143 or the low-pressure switch 141 will trigger the safety program. The safety program can control the safety control valve 142 to interrupt the gas supply, thereby avoiding potential safety risks and monitoring and protecting the safe operation of the combustion system 100.

[0057] Optionally, the main gas pipeline 10 may also be provided with a proportional regulating valve 15, a pressure gauge 16 after the proportional valve, and a manual ball valve 17. The proportional regulating valve 15 is used to accurately adjust the gas flow rate to ensure that the combustion device 70 receives an appropriate amount of gas to achieve the best combustion efficiency. The proportional regulating valve 15 is linked with the proportional valve 43 to make the combustion air and gas reach a suitable ratio. By changing the opening of the proportional regulating valve 15, the combustion system 100 can adjust the gas supply according to the combustion demand, thereby achieving the economy and environmental protection of the combustion process. The pressure gauge 16 after the proportional valve is used to detect the pressure value of the main gas pipeline 10 after the proportional regulating valve 15 is adjusted to ensure the stability of the gas pressure flowing from the main gas pipeline 10 to the combustion device 70; the manual ball valve 17 can fully open or close the main gas pipeline 10 to control the on-off of the main gas pipeline 10. For example, when maintenance and inspection are required or in an emergency, the manual ball valve 17 can be manually operated to control the on-off of the main gas pipeline 10.

[0058] like Figure 1As shown, the ignition pipeline 20 is provided with a fifth control valve 21, a second pressure reducing valve 22, an ignition pressure switch 23 and a fifth pressure gauge 24 in sequence. The fifth control valve 21 is used to control the on-off of the ignition pipeline 20. The second pressure reducing valve 22 is used to adjust the pressure of the ignition pipeline 20. For example, the second pressure reducing valve 22 can reduce and stabilize the gas pressure of the ignition pipeline 20 to ensure stability. The ignition pressure switch 23 is used to detect the outlet pressure of the second pressure reducing valve 22 and respond to the safety control system. In other words, the ignition pressure switch 23 can be used to monitor whether the pressure of the ignition pipeline 20 is within the safety pressure range. If the pressure exceeds the safety pressure range, the ignition pressure switch 23 can be used to monitor whether the pressure of the ignition pipeline 20 is within the safety pressure range. range, the ignition pressure switch 23 is triggered to transmit information to the safety control system to start the safety program. For example, the ignition pressure switch 23 can be an ignition low-pressure switch, which is used to detect whether the pressure of the ignition line 20 is lower than the preset safety lower limit. If the pressure is too low, the ignition low-pressure switch will be triggered to start the safety program, such as shutting down part or all of the operations of the combustion system 100 to prevent incomplete combustion or burner flameout. The fifth pressure gauge 24 is used to detect the outlet pressure of the second pressure reducing valve 22, so as to detect whether the second pressure reducing valve 22 adjusts the pressure too low to cause ignition failure.

[0059] like Figure 1 As shown, the ignition pipeline 20 is also provided with a solenoid valve 25, a pressure gauge 26 after the solenoid valve and a manual control valve 27 in sequence. The solenoid valve 25 is used to accurately control the supply of gas to ensure combustion efficiency. At the same time, it can respond to the needs of the safety control system to quickly cut off the gas flow in case of emergency. The pressure gauge 26 after the solenoid valve is used to detect the pressure value after the solenoid valve 25, that is, to detect the final pressure value at the end of the ignition pipeline 20. The solenoid valve 25 can perform an opening or closing operation according to the pressure value detected by the pressure gauge 26 after the solenoid valve. The manual control valve 27 is used to manually control the on and off of the ignition pipeline 20. For example, the manual control valve 27 can be operated in an emergency or other situation requiring manual control. Further, a spare solenoid valve can also be provided on the ignition pipeline 20, and the spare solenoid valve can be arranged between the solenoid valve 25 and the pressure gauge 26 after the solenoid valve.

[0060] It should be noted that the first control valve 31, the second control valve 51, the fourth control valve 11, the fifth control valve 21 and the manual control valve 27 can all be manual ball valves, which have good sealing performance, flow capacity and corrosion resistance, and can ensure the stability and safety of the combustion system 100.

[0061] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A combustion system (100), characterized in that: include: Combustion device (70); a main gas pipeline (10), the main gas pipeline (10) being connected to the combustion device (70) for conveying gas to the combustion device (70); an ignition pipeline (20) for delivering fuel gas to an igniter of the combustion device (70) during ignition; A first combustion-supporting air pipeline (30) is used to deliver combustion-supporting air to the igniter during ignition; a second combustion-supporting air pipeline (40) for conveying combustion-supporting air to the combustion device (70) under normal working conditions, wherein the second combustion-supporting air pipeline (40) and the first combustion-supporting air pipeline (30) are respectively formed as independent pipelines and are both connected to the combustion device (70); A compressed air pipeline (50) is used to deliver compressed air to the combustion device (70) for cooling.

2. The combustion system (100) according to claim 1, characterized in that: It also includes a mixer, and the ignition pipeline (20) and the first combustion-supporting air pipeline (30) are both connected to the mixer (60) and connected to the igniter through the mixer (60).

3. The combustion system (100) according to claim 1, characterized in that: The first combustion-supporting air pipeline (30) is provided with a first control valve (31), a pressure regulating filter, a first regulating valve (34) and a first pressure gauge (35) in sequence, wherein the first control valve (31) is used to control the on-off of the first combustion-supporting air pipeline (30), the first regulating valve (34) is used to regulate the flow of the first combustion-supporting air pipeline (30), the first pressure gauge (35) is used to measure the pressure of the first combustion-supporting air pipeline (30), and the pressure regulating filter is used to filter and regulate the pressure of the first combustion-supporting air pipeline (30).

4. The combustion system (100) according to claim 3, characterized in that: The pressure regulating filter element comprises a first filter (32) and a first pressure regulating valve (33), wherein the first filter (32) is used to filter the combustion-supporting air flowing through the first combustion-supporting air pipeline (30), and the first pressure regulating valve (33) is used to adjust the pressure of the first combustion-supporting air pipeline (30).

5. The combustion system (100) according to claim 1, characterized in that: The compressed air pipeline (50) is provided with a second control valve (51) and a pressure regulating and filtering dual component (52) in sequence, wherein the second control valve (51) is used to control the on-off of the compressed air pipeline (50), and the pressure regulating and filtering dual component (52) is used to regulate and filter the pressure of the compressed air flowing through the compressed air pipeline (50).

6. The combustion system (100) according to claim 1, characterized in that: The second combustion-supporting air pipeline (40) is provided with a combustion-supporting air fan (41), a proportional valve (43), a third control valve (44) and a second pressure gauge (45) in sequence. The proportional valve (43) is used to adjust the amount of combustion-supporting air entering the combustion device (70). The third control valve (44) is used to control the on-off of the second combustion-supporting air pipeline (40). The second pressure gauge (45) is used to detect the outlet pressure of the proportional valve.

7. The combustion system (100) according to claim 6, characterized in that: It also includes a combustion-supporting air bypass pipeline (42), one end of which is connected to the second combustion-supporting air pipeline (40) and connected between the combustion-supporting air fan (41) and the proportional valve (43), and the other end of which is connected to the combustion device (70) for cooling.

8. The combustion system (100) according to claim 1, characterized in that: The main gas pipeline (10) is provided with a fourth control valve (11), a second filter (12), a pressure reducing assembly (13) and a pressure control assembly (14) in sequence; the second filter (12) is used to filter the gas in the main gas pipeline (10); the pressure reducing assembly (13) is used to adjust and detect the pressure of the main gas pipeline (10); and the pressure control assembly (14) is used to monitor the pressure of the main gas pipeline (10) and control the on and off of the main gas pipeline (10) according to the pressure.

9. The combustion system (100) according to claim 8, characterized in that: Also includes at least one of the following features: (1) The pressure reducing assembly (13) comprises a third pressure gauge (131), a first pressure reducing valve (132) and a fourth pressure gauge (133) which are arranged in sequence, the third pressure gauge (131) being used to detect the outlet pressure of the second filter (12), the first pressure reducing valve (132) being used to adjust the pressure of the main gas pipeline (10), and the fourth pressure gauge (133) being used to detect the pressure of the main gas pipeline (10) after pressure reduction; (2) The pressure control component (14) comprises a low-pressure switch (141), a safety control valve (142) and a high-pressure switch (143) which are arranged in sequence. The low-pressure switch (141) is provided with a preset minimum pressure value and is used to monitor whether the pressure of the main gas pipeline (10) is lower than the preset minimum pressure value. The high-pressure switch (143) is provided with a preset maximum pressure value and is used to monitor whether the pressure of the main gas pipeline (10) is higher than the preset maximum pressure value. The safety control valve (142) is used to control the on-off of the main gas pipeline (10) according to the monitoring results of the low-pressure switch (141) and the high-pressure switch (143).

10. The combustion system (100) according to claim 1, characterized in that: The ignition pipeline (20) is provided with a fifth control valve (21), a second pressure reducing valve (22), an ignition pressure switch (23) and a fifth pressure gauge (24) in sequence, wherein the second pressure reducing valve (22) is used to adjust the pressure of the ignition pipeline (20), the ignition pressure switch (23) is used to monitor the outlet pressure of the second pressure reducing valve and respond to the safety control system, and the fifth pressure gauge (24) is used to detect the outlet pressure of the second pressure reducing valve (22).

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