Ignition monitoring method of boiler burner

Abstract

The invention provides an ignition monitoring method of a boiler burner. The ignition monitoring method for the boiler burner comprises the following steps that S100, fuel gas and air are introduced into the burner, and combustible mixed gas is obtained; s200, the real-time combustion value of the combustible mixed gas is collected through a temperature detection assembly of the ignition monitoring system; wherein the temperature detection assembly comprises an ignition temperature probe and a cooling pipe, a sensing part of the ignition temperature probe is located in the combustor, and the cooling pipe is arranged close to the ignition temperature probe and used for cooling the ignition temperature probe; s300, if the real-time combustion value is matched with a preset combustion value of the ignition monitoring system, a combustion working mode is started; and if not, returning to the step S200. According to the method, due to the fact that the cooling pipe is arranged adjacent to the ignition temperature probe, the cooling air coming out of the cooling pipe not only achieves a good cooling effect on the ignition temperature probe, but also achieves a cleaning effect on the ignition temperature probe, and the detection accuracy of the ignition temperature probe is effectively guaranteed.

Description

Technical Field

[0001] The present disclosure relates to the technical field of boiler burner ignition, and in particular to an ignition monitoring method for a boiler burner. Background Art

[0002] The application of boilers in pharmaceutical factories mainly focuses on its core function of providing stable and reliable steam supply, so that the generated steam can be used in the fermentation, extraction and concentration processes of pharmaceutical factories. The structure of a general boiler includes a boiler body and a burner. Before the boiler burns, it is usually necessary to use an ignition temperature probe to detect the combustible mixture in the burner to determine whether the combustible mixture in the burner has reached the ignition point of combustion, so as to ensure that the combustion of the boiler is carried out within the preset temperature range, effectively avoiding safety accidents caused by excessively high or low temperatures.

[0003] However, since the combustion temperature in the boiler body is as high as about 1200℃, the temperature in the burner is as high as about 400℃~500℃. Therefore, during long-term use, the ignition temperature probe is prone to aging, which affects the ignition temperature probe's inaccurate monitoring of the combustible mixture in the burner. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide an ignition monitoring method for a boiler burner which can both cool and clean the ignition temperature probe to ensure the accuracy of the ignition temperature probe detection.

[0005] The purpose of this disclosure is achieved through the following technical solutions:

[0006] A method for monitoring the ignition of a boiler burner comprises the following steps:

[0007] S100, respectively introducing fuel gas and air into the burner to obtain a combustible mixed gas;

[0008] S200, collecting the real-time combustion value of the combustible mixed gas through the temperature detection component of the ignition monitoring system; wherein the temperature detection component includes an ignition temperature probe and a cooling tube, the sensing part of the ignition temperature probe is located in the burner, the cooling tube is arranged adjacent to the ignition temperature probe, and the cooling tube is used to cool and clean the ignition temperature probe;

[0009] S300, if the real-time combustion value matches the preset combustion value of the ignition monitoring system, starting the combustion working mode;

[0010] If not, return to step S200.

[0011] In one embodiment, after step S300, the ignition monitoring method further includes the following steps:

[0012] S400: When the combustion operation is completed, cooling gas is introduced into the ignition temperature probe through the cooling pipe.

[0013] In one embodiment, the cooling gas includes at least one of clean air and oxygen.

[0014] In one of the embodiments, in step S200, the oxygen is introduced into the ignition temperature probe through the cooling tube; in step S400, clean air is introduced into the ignition temperature probe through the cooling tube.

[0015] In one of the embodiments, two through holes are provided on a side of the cooling tube away from the burner, namely a first through hole and a second through hole, the first through hole is used for connecting to an external oxygen tank, and the second through hole is used for connecting to an external air compressor.

[0016] In one embodiment, the flow rate of the oxygen is 1 m / s to 30 m / s, and the intake pressure of the oxygen is 0.001 kpa to 0.1 kpa; and / or,

[0017] The flow rate of the clean air is 10m / s to 30m / s, and the intake pressure of the clean air is 0.01kpa to 0.1kpa.

[0018] In one embodiment, the ignition temperature probe is an ultraviolet flame detector.

[0019] In one embodiment, the pressure of the gas is 0.02 kPa to 2.0 kPa; and / or,

[0020] The pressure of the air is 0.1 kpa to 1.0 kpa.

[0021] In one embodiment, the burner includes a shell, a gas component, an air component and an ignition monitoring system, the ignition monitoring system includes a temperature detection component and an ignition component, the ignition component includes a fire tube, a combustion head and a nozzle, the shell forms an air supply channel, the fire tube forms a accommodating cavity, the fire tube is connected to the shell, the combustion head is arranged in the accommodating cavity and communicated with the air supply channel, the gas component and the air component are respectively connected and arranged in the air supply channel, the sensing part of the ignition temperature probe is located in the air supply channel; the nozzle is arranged on the combustion head.

[0022] In one embodiment, the ignition monitoring system further comprises a control module, an ignition electrode is provided in the combustion head, and the control module is electrically connected to the ignition electrode and the ignition temperature probe respectively; and / or,

[0023] The number of the nozzles is at least two.

[0024] Compared with the prior art, the present invention has at least the following advantages:

[0025] Since the cooling tube is arranged adjacent to the ignition temperature probe, when the cooling tube is connected to the external cooling gas, the introduced cooling gas can play a good cooling effect on the ignition temperature probe, thereby preventing the ignition temperature probe from being easily heated up and causing the ignition temperature probe to be easily aged during long-term use. In addition, the introduced cooling gas can also effectively blow away the dust adhering to the surface of the ignition temperature probe, thereby achieving the cleaning effect of the ignition temperature probe, effectively ensuring the detection sensitivity of the ignition temperature probe, and ensuring that the ignition temperature probe can still maintain a high detection accuracy during long-term use, thereby achieving the accuracy of monitoring the combustible mixture in the burner, effectively avoiding the phenomenon of misjudgment, and extending the service life of the ignition temperature probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, 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 disclosure 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.

[0027] Figure 1 This is a flow chart of a method for monitoring the ignition of a boiler burner according to an embodiment of the present invention;

[0028] Figure 2 A schematic structural diagram of a boiler in one direction according to an embodiment of the present invention;

[0029] Figure 3 A schematic structural diagram of a burner in one direction according to an embodiment of the present invention;

[0030] Figure 4 A schematic structural diagram of a burner in another direction according to an embodiment of the present invention;

[0031] Figure 5 A partial structural schematic diagram of a burner according to an embodiment of the present invention;

[0032] Figure 6 A three-dimensional exploded view of a burner in one direction according to an embodiment of the present invention;

[0033] Figure 7 It is a structural schematic diagram of one direction of connection of a nozzle, a central nozzle mounting seat and a combustion head according to an embodiment of the present invention;

[0034] Figure 8 It is a structural schematic diagram of one direction of connection of an ignition temperature probe, a cooling tube and a bending flow tube according to an embodiment of the present invention;

[0035] Fig. 9 A partial cross-sectional view of a bent flow tube in one direction according to an embodiment of the present invention;

[0036] Fig.10 This is a physical picture of the installation of cooling pipes according to an embodiment of the present invention.

[0037] Figure numerals: 10, boiler; 100, boiler body; 200, burner; 210, gas assembly; 211, gas pipeline; 220, shell; 221, air supply channel; 2211, first air inlet; 2212, second air inlet; 300, ignition monitoring system; 310, temperature detection assembly; 311, ignition temperature probe; 3111, induction unit; 3112, installation shell; 3112a, installation cavity; 3112b, cooling cavity; 3113, ignition temperature Probe body; 312, cooling tube; 313, bent spoiler tube; 3131, diversion hole; 3133, first connecting tube; 3134, second connecting tube; 314, thermal expansion plug; 3141, deformation hole; 320, ignition assembly; 321, fire tube; 322, combustion head; 323, nozzle; 3231, bent short nozzle; 3232, bent long nozzle; 324, ignition electrode; 325, wind shield; 326, center nozzle mounting seat; 330, control module. DETAILED DESCRIPTION

[0038] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0039] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0041] The present disclosure provides an ignition monitoring method for a boiler burner, comprising the following steps: S100, respectively introducing fuel gas and air into the burner to obtain a combustible mixed gas; S200, collecting a real-time combustion value of the combustible mixed gas through a temperature detection component of an ignition monitoring system; wherein the temperature detection component comprises an ignition temperature probe and a cooling tube, the sensing portion of the ignition temperature probe is located in the burner, the cooling tube is arranged adjacent to the ignition temperature probe, and the cooling tube is used to cool and clean the ignition temperature probe; S300, if the real-time combustion value matches the preset combustion value of the ignition monitoring system, then starting a combustion working mode; if not, returning to step S200.

[0042] In the above-mentioned method for monitoring the ignition of a boiler burner, since the cooling tube is arranged adjacent to the ignition temperature probe, when the cooling tube is connected to the external cooling gas, the introduced cooling gas can play a good cooling effect on the ignition temperature probe, thereby preventing the ignition temperature probe from being easily heated up and causing the ignition temperature probe to be easily aged during long-term use. In addition, the introduced cooling gas can also effectively blow away the dust adhering to the surface of the ignition temperature probe, thereby achieving a cleaning effect on the ignition temperature probe, effectively ensuring the detection sensitivity of the ignition temperature probe, and ensuring that the ignition temperature probe can still maintain a high detection accuracy during long-term use, thereby achieving the accuracy of monitoring the combustible mixture in the burner, effectively avoiding the phenomenon of misjudgment, and extending the service life of the ignition temperature probe.

[0043] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments. Figure 2 In one embodiment, the ignition monitoring method of a boiler burner is performed in a boiler body, the boiler body includes a boiler body and a burner connected to each other, and the burner is used to provide heat to the boiler body. Figure 1 The ignition monitoring method of a boiler burner of an embodiment includes some or all of the following steps:

[0044] S100, respectively introducing fuel gas and air into the burner 200 to obtain a combustible mixed gas.

[0045] It is understandable that Figures 2 to 4As shown, in one embodiment, the burner 200 includes a gas component 210 and an air component (not shown), and an air supply channel 221 is formed in the burner 200, and the air supply channel 221 is formed with a first air inlet 2211 and a second air inlet 2212. The first air inlet 2211 is used to communicate with the gas component 210 so that the gas component 210 can deliver the gas into the air supply channel 221; and because the second air inlet 2212 is used to communicate with the air component so that the air component can deliver air into the air supply channel 221; thereby, a mixing operation of gas and air is realized to obtain a combustible mixed gas in preparation for combustion.

[0046] S200, collecting the real-time combustion value of the combustible mixed gas through the temperature detection component 310 of the ignition monitoring system 300 to obtain the current ignition point of the combustible mixed gas, so as to facilitate subsequent judgment with the preset value.

[0047] It is understandable that Figure 8 and Fig.10 As shown, the temperature detection component 310 includes an ignition temperature probe 311 and a cooling tube 312. The sensing portion 3111 of the ignition temperature probe 311 is located in the burner 200 to ensure that the sensing portion 3111 of the ignition temperature probe 311 can collect the combustion value of the air supply channel 221 in the burner 200. Since the cooling tube 312 is arranged adjacent to the ignition temperature probe 311, when the cooling tube 312 is connected to the external cooling gas, the introduced cooling gas can have a good cooling effect on the ignition temperature probe 311, thereby preventing the ignition temperature probe 311 from being easily damaged. The ignition temperature probe 311 is prone to aging during long-term use due to high-temperature heating. In addition, the introduced cooling gas can effectively blow away the dust adhering to the surface of the ignition temperature probe 311, thereby achieving a cleaning effect on the ignition temperature probe 311, effectively ensuring the detection sensitivity of the ignition temperature probe 311, and ensuring that the ignition temperature probe 311 can still maintain a high detection accuracy during long-term use, thereby achieving accurate monitoring of the combustible mixture in the burner 200, effectively avoiding misjudgment, and extending the service life of the ignition temperature probe 311.

[0048] like Figures 5-6As shown, in one embodiment, the burner 200 includes a shell 220, a gas component 210, an air component and an ignition monitoring system 300, the ignition monitoring system 300 includes a temperature detection component 310 and an ignition component 320, the ignition component 320 includes a fire tube 321, a combustion head 322 and a nozzle 323, the shell 220 is formed with an air supply channel 221, the fire tube 321 is formed with a receiving cavity, which is convenient for accommodating the combustion head 322; the fire tube 321 is connected to the shell 220, the combustion head 322 is arranged in the receiving cavity, and is communicated with the gas supply channel 221, so that the combustion head 322 can be communicated with the gas supply channel 221, so that air can enter the combustion head 322 from the gas supply channel 221, the gas component 210 and the air component are respectively connected and arranged in the gas supply channel 221; so that the gas component 210 can deliver gas into the gas supply channel 221, the air component The component can deliver air into the air supply channel 221, and at the same time, with the use of the fan of the air component, the delivered gas and air can enter the combustion head 322, realize the mixing operation of gas and air, and obtain a combustible mixed gas; and because the nozzle 323 is connected to the combustion head 322, the combustible mixed gas is ejected through the nozzle 323, and then the combustible mixed gas is ignited by the ignition electrode 324 on the combustion head 322, so that the gas and air can generate a flame, and because the nozzle 323 is located in the furnace cavity, the heat of the flame generated by the nozzle 323 will be dispersed and transferred to the furnace cavity of the boiler body 10, so as to realize the heating operation in the furnace cavity; and because the sensing part 3111 of the ignition temperature probe 311 is located in the air supply channel 221, the sensing part 3111 of the ignition temperature probe 311 can collect the combustion values ​​of the gas and air at this time, so as to realize the real-time combustion value collection operation of the combustible mixed gas.

[0049] In one embodiment, the ignition temperature probe 311 is an ultraviolet flame detector to realize the collection operation of the real-time combustion value of the combustible mixed gas.

[0050] In one embodiment, the model of the ultraviolet flame detector is QRA4 U or FFS08 UV-1 / 5M, so as to realize accurate and rapid information collection of combustible mixed gas.

[0051] In one embodiment, the ignition monitoring system 300 also includes a control module 330, an ignition electrode 324 is provided in the combustion head 322, and the control module 330 is electrically connected to the ignition electrode 324 and the ignition temperature probe 311, respectively, so that the ignition temperature probe 311 can feed back the real-time combustion value of the combustible mixture gas collected to the control module 330, and the control module 330 processes it; at the same time, the control module 330 can control the ignition opening and closing action of the ignition electrode 324 to realize the ignition operation of the ignition electrode 324 on the combustible mixture gas.

[0052] S300: If the real-time combustion value matches the preset combustion value of the ignition monitoring system 300, the combustion working mode is started; if not, the process returns to step S200.

[0053] It can be understood that since the ignition temperature probe 311 can feed back the real-time combustion value to the control module 330, the control module 330 will compare the real-time combustion value with the preset combustion value. If the real-time combustion value matches the preset combustion value, the combustion working mode will be started; if the real-time combustion value does not match the preset combustion value, the combustion requirement is not met, that is, the combustible mixture has insufficient combustion, resulting in a high nitrogen gas content and causing a waste of fuel gas.

[0054] It is worth mentioning that the comparison principle of the control module 330 on the real-time combustion value, the ignition principle of the ignition electrode 324, and the principle of the ignition temperature probe 311 sensing and collecting the real-time combustion value of the combustible mixed gas all belong to the prior art. Therefore, no specific description is given in this disclosure.

[0055] In the above-mentioned ignition monitoring method of the burner 200 of the boiler 10, since the cooling pipe 312 is arranged adjacent to the ignition temperature probe 311, when the cooling pipe 312 is connected to the external cooling gas, the introduced cooling gas can play a good cooling effect on the ignition temperature probe 311, thereby avoiding the ignition temperature probe 311 from being easily heated up due to high temperature, which may cause the ignition temperature probe 311 to be easily aged during long-term use. In addition, the introduced cooling gas can also effectively blow away the dust adhering to the surface of the ignition temperature probe 311, that is, the cleaning effect of the ignition temperature probe 311 is achieved, and the detection sensitivity of the ignition temperature probe 311 is effectively guaranteed, and it is ensured that the ignition temperature probe 311 can still maintain a high detection accuracy during long-term use, thereby achieving the accuracy of monitoring the combustible mixture in the burner 200, effectively avoiding the phenomenon of misjudgment, and extending the service life of the ignition temperature probe 311.

[0056] In one of the embodiments, after step S300, the ignition monitoring method further includes the following steps: S400, when the combustion operation is completed, cooling gas is introduced into the ignition temperature probe 311 through the cooling tube 312, thereby achieving a better cooling and cleaning effect on the high-temperature ignition temperature probe 311, and effectively avoiding the aging problem of the ignition temperature probe 311 during long-term use, so as to ensure that the ignition temperature probe 311 can more accurately collect real-time combustion values ​​during combustion operation.

[0057] In one embodiment, the cooling gas includes at least one of clean air and oxygen to achieve cooling and cleaning of the ignition temperature probe 311. In addition, since clean air and oxygen have less impurities and dust, it is ensured that the clean air and oxygen introduced will not adhere to the surface of the ignition temperature probe 311 due to more impurities or dust, thereby affecting the accuracy of the detection of the ignition temperature probe 311.

[0058] In one embodiment, the flow rate of the oxygen is 1m / s to 30m / s, and the intake pressure of the oxygen is 0.001kpa to 0.1kpa, so as to ensure that the amount of oxygen introduced is more appropriate, thereby ensuring that the introduced oxygen can achieve a better cooling and cleaning effect on the ignition temperature probe 311.

[0059] Similarly, in one of the embodiments, the flow rate of the clean air is 10m / s~30m / s, and the intake pressure of the clean air is 0.01kpa~0.1kpa, so as to ensure that the amount of clean air introduced is more appropriate, thereby ensuring that the clean air introduced can achieve a better cooling and cleaning effect on the ignition temperature probe 311.

[0060] It can be understood that when the burner 200 is in the initial stage of ignition, the temperature of the burner 200 and the boiler body 10 is relatively low, and the combustible mixture introduced at this time is also at a relatively low temperature. In addition, the temperature of the newly introduced fuel gas and air is also relatively low, resulting in the combustible mixture being more difficult to ignite in the initial stage of ignition. Therefore, in one of the embodiments, in step S200, the oxygen is introduced into the ignition temperature probe 311 through the cooling tube 312; the introduced oxygen helps to increase the oxygen content in the combustible mixture, so as to realize the rapid ignition operation of the combustible mixture, and effectively improve the phenomenon that the combustible mixture is difficult to ignite in the initial stage of ignition; in step S400, clean air is introduced into the ignition temperature probe 311 through the cooling tube 312, so that the introduced clean air can not only clean up all the oxygen remaining in the cooling tube 312 into the air supply channel 221, thereby improving the utilization rate of oxygen, but also effectively avoiding the problem of low oxygen utilization rate caused by oxygen remaining in the cooling tube 312; and the cleaned oxygen can enter the combustion head 322, so that the incompletely burned combustible mixture continues to burn, thereby improving the combustion efficiency of the combustible mixture.

[0061] In one embodiment, two through holes are provided on the side of the cooling tube 312 away from the burner 200, which are a first through hole and a second through hole. The first through hole is used to connect with an external oxygen tank, so that the oxygen in the oxygen tank can enter the cooling tube 312 through the first through hole, and then enter the ignition temperature probe 311 through the cooling tube 312; the second through hole is used to connect with an external air compressor, so that the air in the air compressor can enter the cooling tube 312 through the second through hole, and then enter the ignition temperature probe 311 through the cooling tube 312; the dual-purpose effect of one cooling tube 312 is achieved, which not only saves costs but also improves the compactness of the burner 200 structure.

[0062] It is understandable that, during the use process, when the gas or air introduced occasionally fluctuates, such as when the gas is introduced in a large amount or the air is introduced in a small amount, the oxygen content in the mixture ratio of the combustible mixed gas will be low, resulting in incomplete combustion of the combustible mixed gas and reducing the thermal energy utilization rate of the gas. Therefore, in one embodiment, in step S300, when the burner 200 enters the combustion operation, a trace amount of the oxygen is introduced into the ignition temperature probe 311 through the cooling pipe 312 to achieve oxygen compensation operation for the combustible mixed gas, thereby ensuring that the combustible mixed gas is fully burned during the entire combustion process, effectively avoiding the problem of incomplete combustion of the combustible mixed gas due to occasional fluctuations in the gas or air introduced during the combustion process; and the fully burned combustible mixed gas can provide sufficient power for the subsequent nozzles 323 to meet the flame ignition requirements of a large number of nozzles 323 with high power. In addition, the introduced oxygen can also play a certain cooling and cleaning role on the ignition temperature probe 311 during combustion operation, effectively avoiding the aging problem of the ignition temperature probe 311 caused by the high temperature of long-term combustion operation, and ensuring the accuracy of the ignition temperature probe 311 monitoring during combustion operation.

[0063] It is understandable that if too much oxygen is introduced in step S300, white dew will form on the surface of the ignition temperature probe 311 and affect the accuracy of the detection of the ignition temperature probe 311. If too little oxygen is introduced in step S300, sufficient power cannot be provided for the subsequent nozzle 323. Therefore, the intake pressure of the oxygen introduced in step S300 is 0.001kpa~0.05kpa, and the flow rate of oxygen is 1m / s~10m / s, so as to ensure that the amount of oxygen added is more appropriate to achieve the effect of supporting combustion, and ensure that the flow rate of the added oxygen is relatively slow. In this way, the oxygen just entering the air supply channel 221 will quickly absorb the heat in the air supply channel 221, and mix with the gas in the air supply channel 221 to form a higher temperature gas, thereby reducing the temperature actually reaching the sensing part 3111 of the ignition temperature probe 311, thereby avoiding the problem of white dew forming on the surface of the ignition temperature probe 311 due to the introduction of more and faster oxygen, thereby affecting the detection accuracy of the ignition temperature probe 311, and providing sufficient power for the subsequent nozzles 323 to meet the high-power flame ignition requirements of a large number of nozzles 323.

[0064] That is to say, when the intake pressure of the oxygen is 0.001kpa~0.05kpa and the flow rate of oxygen is 1m / s~10m / s, it can have a certain cooling effect on the ignition temperature probe 311, and at the same time will not cause white dew on the surface of the ignition temperature probe 311.

[0065] In one of the preferred embodiments, in step S200, the intake pressure of the oxygen introduced is 0.05kpa~0.1kpa, and the flow rate of oxygen is 20m / s~30m / s, so that the amount of oxygen introduced is relatively high and relatively fast, so that the oxygen introduced can quickly flow into the air supply channel 221, effectively increasing the oxygen content in the combustible mixed gas, so as to achieve a rapid combustion-supporting effect on the combustible mixed gas, and effectively improving the phenomenon that the combustible mixed gas is difficult to ignite at the initial stage of ignition. It is worth mentioning that if the step S200 uses oxygen with a slow flow rate and a relatively small amount, the rapid combustion-supporting effect cannot be achieved. Therefore, in the present disclosure, in order to achieve a rapid combustion-supporting effect on the combustible mixed gas, by controlling the intake pressure of oxygen to 0.05kpa~0.1kpa and the flow rate of oxygen to 20m / s~30m / s, it is ensured that the amount of oxygen introduced is relatively large, so as to quickly achieve the combustion-supporting effect.

[0066] It should be noted that, in step S200, the burner 200 is in the initial stage of operation, and the temperature of the various components in the burner 200 is relatively low at this time, that is, the temperature of the ignition temperature probe 311 in this stage is lower than that during combustion operation. Therefore, the temperature difference between the ignition temperature probe 311 in step S200 and the introduced oxygen is relatively small. Therefore, a relatively large amount of oxygen can be introduced in this stage to ensure that the combustible mixture can quickly reach the preset combustion value.

[0067] It can also be understood that if the flow rate of oxygen is greater than 30m / s or the intake pressure is greater than 0.1kpa, the amount of oxygen introduced will be relatively large, resulting in white dew on the surface of the ignition temperature probe 311 and affecting the accuracy of the detection of the ignition temperature probe 311. If the flow rate of oxygen is less than 20m / s or the intake pressure is less than 0.05kpa, the amount of oxygen introduced will be relatively small, and the rapid combustion-supporting effect on the combustible mixed gas cannot be achieved. Therefore, in the present disclosure, by controlling the intake pressure of oxygen in step S200 to be 0.05kpa~0.1kpa and the flow rate of oxygen to be 20m / s~30m / s, it is ensured that the amount of oxygen introduced is relatively large to quickly achieve the combustion-supporting effect, and it is also ensured that the amount of oxygen introduced will not cause white dew on the surface of the ignition temperature probe 311 and affect the accuracy of the detection of the ignition temperature probe 311. In particular, the oxygen introduced in step S300 has an intake pressure of 0.001 kpa to 0.05 kpa and an oxygen flow rate of 1 m / s to 10 m / s, to ensure that the introduced oxygen can achieve a better combustion-supporting effect in the initial stage of ignition and the combustion of the boiler 10, and also to ensure that the introduced oxygen can achieve a cooling and cleaning effect on the ignition temperature probe 311, which not only ensures the detection accuracy of the ignition temperature probe 311, but also extends the service life of the ignition temperature probe 311.

[0068] like Figure 8 and Fig.10As shown in one embodiment, the ignition temperature probe 311 includes a mounting shell 3112 and an ignition temperature probe body 3113. The mounting shell 3112 is disposed on the outer shell 220 of the burner 200. A mounting cavity 3112a and a cooling cavity 3112b are formed in the mounting shell 3112. The ignition temperature probe body 3113 is disposed in the mounting cavity 3112a. The sensing portion 3111 of the ignition temperature probe body 3113 is located in the air supply passage 221. The channel 221 is connected with the combustion head 322, so that the sensing part 3111 of the ignition temperature probe body 3113 can better collect the real-time combustion value of the combustible mixed gas; the cooling tube 312 is detachably arranged in the cooling cavity 3112b, so that the cooling gas passed by the cooling tube 312 can enter the cooling cavity 3112b, and because an outlet is formed at one end of the cooling cavity 3112b located in the air supply channel 221, the outlet is arranged toward the sensing part 3111 of the ignition temperature probe body 3113, so that the outlet The cooling gas flowing out of the outlet can realize the cooling and cleaning effect of the ignition temperature probe body 3113, and the cooling gas in the cooling cavity 3112b can flow in the cooling cavity 3112b, thereby realizing a more comprehensive cooling and cooling effect on the ignition temperature probe body 3113, thereby ensuring the accuracy of the ignition temperature probe 311 detection, especially when the cooling gas introduced is oxygen, the oxygen intake pressure of step S200 is controlled to be 0.05kpa~0.1kpa, and the oxygen flow rate is 20m / s~30m / s, the intake pressure of the oxygen introduced in step S300 is 0.001kpa~0.05kpa, and the flow rate of oxygen is 1m / s~10m / s, so as to ensure that the introduced oxygen can achieve a good combustion-supporting effect in the initial stage of ignition and the combustion work of the boiler 10, and also ensure that the introduced oxygen can achieve a cooling and cleaning effect on the ignition temperature probe 311, which not only ensures the detection accuracy of the ignition temperature probe 311, but also extends the service life of the ignition temperature probe 311.

[0069] In one embodiment, a sensing portion 3111 is formed at one end of the ignition temperature probe body 3113 close to the combustion head 322 .

[0070] In one embodiment, the cooling cavity 3112b is provided with a cooling air inlet, and the cooling pipe 312 is screwed into the fixing and cooling air inlet to realize the detachable connection between the cooling pipe 312 and the mounting shell 3112. Of course, the detachable connection between the cooling pipe 312 and the mounting shell 3112 can also be a snap connection.

[0071] like Fig.10 As shown, in one embodiment, the cooling air intake is located at the bottom of the mounting shell 3112.

[0072] In one embodiment, there are multiple air outlets, and each air outlet is evenly distributed along the circumference of the cooling cavity 3112b to ensure that the multiple air outlets can achieve a more comprehensive cooling and cleaning effect on the sensing part 3111 of the ignition temperature probe 311.

[0073] like Figure 8 As shown, in one embodiment, the temperature detection component 310 also includes a plurality of spoiler tubes, and the plurality of spoiler tubes are arranged in a one-to-one correspondence with the plurality of air outlets, and each spoiler tube is formed with a plurality of diversion holes 3131, and each diversion hole 3131 is arranged around the outer peripheral wall of the spoiler tube to achieve a more comprehensive cooling and cleaning effect on the sensing part 3111 of the ignition temperature probe 311.

[0074] It can be understood that, although adding a plurality of spoiler tubes can achieve a more comprehensive cooling and cleaning effect on the sensing portion 3111 of the ignition temperature probe 311, if the plurality of spoiler tubes are arranged more densely, it will affect the collection of the sensing portion 3111 of the ignition temperature probe 311. Therefore, the spoiler tube is a bent spoiler tube 313, so that the plurality of bent spoiler tubes 313 can form an open trumpet-shaped gas cooling area at the sensing portion 3111 of the ignition temperature probe 311, that is, it is ensured that the collection area at the tail of the sensing portion 3111 of the ignition temperature probe 311 is larger, and the accuracy of the collection of the sensing portion 3111 of the ignition temperature probe 311 is effectively avoided from being affected by the addition of a plurality of spoiler tubes.

[0075] It can also be understood that if the distance between the bent spoiler tube 313 and the sensing part 3111 of the ignition temperature probe 311 is too close, the cooling gas just ejected will form more white dew on the surface of the sensing part 3111 of the ignition temperature probe 311, especially the sensing part 3111 of the ignition temperature probe 311 closer to the combustion head 322, the probability of white dew forming will be greater. Therefore, in the present disclosure, the bent spoiler tube 313 is bent outward along the central axis of the ignition temperature probe 311 to ensure that the multiple bent spoiler tubes 313 can form an inverted funnel-shaped gas cooling zone around the ignition temperature probe 311, so that the distance between the inverted funnel-shaped gas cooling zone and the sensing part 3111 of the ignition temperature probe 311 gradually increases from the end far away from the combustion head 322 to the end close to the combustion head 322. In this way, the cooling gas ejected from the multiple bent spoiler tubes 313 will not cause the surface of the sensing part 3111 of the ignition temperature probe 311 to be exposed due to the close distance, thereby effectively reducing the probability of the sensing part 3111 of the ignition temperature probe 311 at the end close to the combustion head 322 being easily exposed, thereby ensuring the accuracy of the detection of the sensing part 3111 of the ignition temperature probe 311.

[0076] like Figure 8As shown, in one embodiment, the bent spoiler tube 313 is formed with a bent portion, and the bending angle of the bent portion is 105° to 175°, so as to ensure that the multiple bent spoiler tubes 313 can form an inverted funnel-shaped gas cooling zone around the ignition temperature probe 311.

[0077] In one embodiment, the bent spoiler tube 313 includes a first connecting tube 3133 and a second connecting tube 3134 connected to each other, the first connecting tube 3133 and the second connecting tube 3134 are connected to form a bending portion of 105° to 175°, and the first connecting tube 3133 is connected and arranged on the air outlet so that the cooling gas can enter the first connecting tube 3133 from the cooling cavity 3112b, and then flow into the second connecting tube 3134, and flow out through the diversion hole 3131 of the first connecting tube 3133 and the second connecting tube 3134, so as to realize the cooling and cleaning effect on the ignition temperature probe body 3113.

[0078] In one embodiment, the length ratio of the first connecting tube 3133 and the second connecting tube 3134 is 1:(2~5), so as to ensure that the area of ​​the inverted funnel-shaped gas cooling zone is larger, which is conducive to the sensing part 3111 of the ignition temperature probe 311 to better collect the real-time combustion value of the combustible mixture gas; it also ensures the stability of the connection between the first connecting tube 3133 and the second connecting tube 3134.

[0079] In one of the embodiments, the end of the bent spoiler tube 313 is flush with the end of the sensing portion 3111 of the ignition temperature probe 311, so as to ensure that the multiple bent spoiler tubes 313 can just achieve a more comprehensive cooling and cleaning effect on the sensing portion 3111 of the ignition temperature probe 311, and at the same time avoid the problem that the multiple bent spoiler tubes 313 protrude from the sensing portion 3111 of the ignition temperature probe 311 and cause the bent spoiler tubes 313 to be too close to the combustion head 322, which makes the bent spoiler tubes 313 prone to aging, and at the same time reduces the use cost of the bent spoiler tubes 313.

[0080] In one embodiment, the number of the bent spoiler tubes 313 is 2 to 6, so as to ensure that the multiple bent spoiler tubes 313 are arranged more appropriately in the cooling chamber 3112b, while achieving better cooling and cleaning of the ignition temperature probe 311, and effectively avoiding the bent spoiler tubes 313 from affecting the collection of the sensing part 3111 of the ignition temperature probe 311 due to their dense arrangement.

[0081] It can be understood that when oxygen is introduced in step S300, it is at a high temperature stage. Although the problem of whitening on the surface of the sensing portion 3111 of the ignition temperature probe 311 can be improved to a certain extent by reducing the oxygen amount and oxygen velocity in step S300, since the plurality of diverter holes 3131 are arranged around the outer peripheral wall of the spoiler tube, the oxygen sprayed from the plurality of diverter holes 3131 will still cause the problem of whitening on the surface of the sensing portion 3111 of the ignition temperature probe 311. Therefore, if Fig. 9 As shown, in one of the embodiments, a plurality of diversion holes 3131 on one side of the bent spoiler tube 313 facing the sensing portion 3111 of the ignition temperature probe 311 are provided with heat expansion plugs 314 at intervals, and deformation holes 3141 are formed in the heat expansion plugs 314, so that the added heat expansion plugs 314 will expand themselves at the high temperature of step S300 and close the deformation holes 3141, thereby effectively reducing the amount of gas ejected toward the sensing portion 3111 of the ignition temperature probe 311, so that most of the oxygen will be ejected from the side of the sensing portion 3111 away from the ignition temperature probe 311, further reducing the problem of white exposure on the surface of the sensing portion 3111 of the ignition temperature probe 311, especially in combination with the inverted funnel-shaped gas cooling zone, more effectively reducing the problem of white exposure on the surface of the sensing portion 3111 of the ignition temperature probe 311.

[0082] Furthermore, since the multiple diversion holes 3131 on the side of the bent spoiler tube 313 facing the sensing part 3111 of the ignition temperature probe 311 are spaced apart with thermal expansion plugs 314, a small number of unclosed diversion holes 3131 are left on the side of the bent spoiler tube facing the sensing part 3111 of the ignition temperature probe 311, so as to ensure that the cooling and cleaning effect of the sensing part 3111 of the ignition temperature probe 311 can still be achieved in step S300, thereby ensuring the accuracy of the detection of the ignition temperature probe 311.

[0083] In one embodiment, the heat expansion plug 314 is embedded in the diversion hole 3131 by means of high temperature resistant glue to ensure the stability of the connection between the heat expansion plug 314 and the bent spoiler tube 313 .

[0084] Specifically, the thermal expansion plug 314 is intermittently embedded in the diversion hole 3131 of the second connecting pipe 3134 facing the sensing part 3111 , while the first connecting pipe 3133 is not provided with the thermal expansion plug 314 .

[0085] In one embodiment, the thermal expansion plug 314 is made of a thermal expansion material to ensure that the thermal expansion plug 314 expands as the temperature increases, thereby closing the deformation hole 3141 of the thermal expansion plug 314 .

[0086] In one embodiment, the thermal expansion plug 314 is a polymer expansion material. Further, in one embodiment, the thermal expansion plug 314 is a silicone rubber plug. Further, the rubber content of the silicone rubber plug is 70% to 80% to ensure that the silicone rubber plug can expand itself under high temperature conditions to achieve a sealing effect inside the thermal expansion plug 314.

[0087] In one embodiment, the size of the deformation hole 3141 of the heat expansion plug 314 is set according to the thermal expansion rate of the silicone rubber plug to ensure that the heat expansion plug 314 can effectively seal the deformation hole 3141 as the temperature rises.

[0088] In one embodiment, the gas pressure is 0.02kpa~2.0kpa, especially when the air pressure is 0.1kpa~1.0kpa, to ensure that the amount of gas introduced can achieve a good mixing ratio with the air, so as to ensure that the obtained combustible mixed gas can achieve sufficient combustion, effectively reduce the generation of nitrogen-containing gas, and improve the thermal energy utilization rate of the gas. For details, please refer to Figure 5 .

[0089] like Figure 7 As shown, in one embodiment, the number of the nozzles 323 is at least two, so that the added multiple nozzles 323 can simultaneously transfer and disperse the heat generated by the combustion head 322 in the furnace cavity of the boiler body 10, effectively avoiding the problem of low heat on both sides of the furnace cavity due to excessive heat accumulation in a single nozzle 323.

[0090] In one embodiment, the ignition assembly 320 also includes a central nozzle mounting seat 326, which is arranged at one end of the burner head 322 close to the furnace chamber, and a plurality of first shunt channels are formed in the burner head 322, and the burner head 322 is connected to the gas supply channel 221 through the plurality of first shunt channels; a plurality of second shunt channels are formed on the central nozzle mounting seat 326, and each second shunt channel is connected to each second shunt channel one by one, so that the burner head 322 can be connected to the plurality of second shunt channels of the central nozzle mounting seat 326 through the plurality of first shunt channels, so that the gas supply The air in the channel 221 can enter the multiple second branch flow channels of the central nozzle mounting seat 326 through the multiple first branch flow channels; and because the multiple nozzles 323 are arranged at intervals on the central nozzle mounting seat 326, and the multiple nozzles 323 are respectively connected to the gas pipeline 211 of the gas component 210, the gas coming out of the multiple nozzles 323 can be mixed with the air in the multiple second branch flow channels to form a combustible mixed gas; and because the ignition electrode 324 is arranged on the central nozzle mounting seat 326 and is arranged adjacent to the nozzle 323, the ignition electrode 324 can realize a rapid ignition operation of the combustible mixed gas.

[0091] like Figure 5 , Figure 6 As shown, in one embodiment, the gas pipeline 211 of the gas assembly 210 is arranged in the gas delivery channel 221 and extends into the accommodating cavity of the fire tube 321. The burner head 322 is sleeved on the gas pipeline 211 in the accommodating cavity to realize the connection between the burner head 322 and the gas pipeline 211. Since the central nozzle mounting seat 326 is sleeved on the burner head 322, the connection between the burner head 322 and the central nozzle mounting seat 326 is realized. Since the plurality of nozzles 323 are arranged on the central nozzle mounting seat 32 6, and are respectively connected to the gas pipeline 211, realizing the connection arrangement of multiple nozzles 323 and the gas pipeline 211, so that the gas in the gas pipeline 211 can be sprayed out through the multiple nozzles 323 and mixed with the air coming in from the surrounding of the central nozzle mounting seat 326 to obtain a combustible mixed gas; the fire tube 321 is sleeved on the outer shell 220, and the combustion head 322 and the central nozzle mounting seat 326 are accommodated therein, thereby improving the compactness of the connection of the fire tube 321, the combustion head 322, and the central nozzle mounting seat 326.

[0092] In one embodiment, a mounting portion is formed in the middle of the central nozzle mounting seat 326, and a plurality of mounting holes are formed in the mounting portion. Each nozzle 323 is correspondingly arranged in the mounting hole to achieve the connection setting of the plurality of nozzles 323 and the central nozzle mounting seat 326.

[0093] like Figure 7 As shown, in one embodiment, the nozzle 323 includes a bent short nozzle 3231 and a bent long nozzle 3232, and the bent short nozzle 3231 and the bent long nozzle 3232 are arranged adjacent to each other, so as to ensure that the bent short nozzle 3231 and the bent long nozzle 3232 can form two injection laminar flow surfaces, which helps to accelerate the rapid mixing of gas and air.

[0094] It can be understood that if the bending angle is less than 100°, it is impossible to achieve rapid mixing of gas and air. If the bending angle is greater than 130°, the multiple bent short nozzles 3231 and the bent long nozzles 3232 will be more discrete, and it is impossible to ensure that a single ignition electrode 324 can achieve rapid ignition of the combustible mixed gas. Therefore, in one embodiment, the bending angle of the bent short nozzle 3231 and the bending angle of the bent long nozzle 3232 are both 100° to 130°, so as to ensure that the multiple bent short nozzles 3231 and the multiple bent long nozzles 3232 can achieve rapid ignition of the combustible mixed gas on the premise of accelerating the rapid mixing of gas and air. In addition, the multiple bent short nozzles 3231 and the bent long nozzles 3232 can transfer and disperse the heat to the furnace cavity more evenly, effectively avoiding the problem of uneven heat distribution in the furnace cavity due to the concentrated heat of a single nozzle 323.

[0095] In one of the embodiments, the bending angles of each bent short nozzle 3231 are not equal, and the bending angles of each bent long nozzle 3232 are not equal, so as to ensure that multiple bent short nozzles 3231 and multiple bent long nozzles 3232 can form multiple injection laminar flow surfaces, which helps to accelerate the rapid mixing of gas and air, especially when the bending angles of the bent short nozzles 3231 and the bent long nozzles 3232 are both 100° to 130°, it is ensured that a single ignition electrode 324 can achieve rapid ignition operation of the combustible mixed gas.

[0096] In a preferred embodiment, the number of nozzles 323 is three, namely, three bent short nozzles 3231 and three bent long nozzles 3232, to ensure that the number distribution of nozzles 323 is relatively appropriate, especially with the use of a gas pressure of 0.02kpa~2.0kpa and an air pressure of 0.1kpa~1.0kpa, to ensure that the three bent short nozzles 3231 and the three bent long nozzles 3232 can achieve better dispersed transfer of heat, thereby improving the thermal energy utilization rate of the gas.

[0097] It should be noted that, since the injection amount of the three bent short nozzles 3231 and the three bent long nozzles 3232 is relatively high, if the gas or air introduced occasionally fluctuates, the gas pressure of the combustible mixed gas will be relatively low, that is, it cannot reach 0.6kpa~0.8kpa. When the combustible mixed gas is lower than 0.6kpa~0.8kpa, it is impossible to ensure that the combustible mixed gas can be fully burned. Therefore, in the present disclosure, in step S300, a trace amount of the oxygen is introduced into the ignition temperature probe 311 through the cooling pipe 312 to achieve the oxygen compensation operation of the combustible mixed gas, thereby ensuring that the combustible mixed gas is fully burned during the entire combustion process, effectively avoiding the problem of insufficient combustion of the combustible mixed gas due to occasional fluctuations in the gas or air introduced during the combustion process, thereby improving the thermal energy utilization rate of the gas.

[0098] like Figure 4 As shown, in one embodiment, the ignition assembly 320 also includes a plurality of wind shields 325, each of which is arranged along the periphery of the fire tube 321. The plurality of wind shields 325 are used to prevent the air in the second diverter channel from diffusing outward, so as to ensure that the air coming out of the second diverter channel can be better mixed with the fuel gas from the plurality of nozzles 323, thereby helping to improve the completeness of the combustion of the combustible mixed gas.

[0099] In one embodiment, the wind shield 325 is tiltedly disposed at the periphery of the fire tube 321 to achieve better air collection, thereby better ensuring the uniformity of the mixing of air and gas.

[0100] In one embodiment, the wind shield 325 is triangular or conical, and is disposed at intervals in the gap between adjacent bent short nozzles 3231 and bent long nozzles 3232, thereby better ensuring the uniformity of the mixing of air and gas.

[0101] In one embodiment, the width of the wind shield 325 decreases from the periphery close to the fire tube 321 to the periphery far away from the fire tube 321. In this way, the wind shield 325 can block the air in the second diverter channel from diffusing outward while facilitating the circulation of the gas to achieve more effective mixing of air and gas.

[0102] Compared with the prior art, the present invention has at least the following advantages:

[0103] Since the cooling tube 312 is arranged adjacent to the ignition temperature probe 311, when the cooling tube 312 is connected to the external cooling gas, the introduced cooling gas can play a good cooling effect on the ignition temperature probe 311, thereby preventing the ignition temperature probe 311 from being easily heated up and causing the ignition temperature probe 311 to be easily aged during long-term use. In addition, the introduced cooling gas can also effectively blow away the dust adhering to the surface of the ignition temperature probe 311, that is, it realizes the cleaning effect of the ignition temperature probe 311, effectively ensures the detection sensitivity of the ignition temperature probe 311, and ensures that the ignition temperature probe 311 can still maintain a high detection accuracy during long-term use, thereby achieving the accuracy of monitoring the combustible mixture in the burner 200, effectively avoiding the phenomenon of misjudgment, and extending the service life of the ignition temperature probe 311.

[0104] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

Claims

1. A method for monitoring the ignition of a boiler burner, characterized in that: The steps include: S100, respectively introducing fuel gas and air into the burner to obtain a combustible mixed gas; S200, collecting the real-time combustion value of the combustible mixed gas through the temperature detection component of the ignition monitoring system; wherein the temperature detection component includes an ignition temperature probe and a cooling tube, the sensing part of the ignition temperature probe is located in the burner, the cooling tube is arranged adjacent to the ignition temperature probe, and the cooling tube is used to cool and clean the ignition temperature probe; S300, if the real-time combustion value matches the preset combustion value of the ignition monitoring system, starting the combustion working mode; If not, return to step S200.

2. The ignition monitoring method for a boiler burner according to claim 1, characterized in that: After step S300, the ignition monitoring method further comprises the following steps: S400: When the combustion operation is completed, cooling gas is introduced into the ignition temperature probe through the cooling pipe.

3. The ignition monitoring method for a boiler burner according to claim 2, characterized in that: The cooling gas includes at least one of clean air and oxygen.

4. The ignition monitoring method for a boiler burner according to claim 3, characterized in that: In step S200, the oxygen is introduced into the ignition temperature probe through the cooling pipe; in step S400, clean air is introduced into the ignition temperature probe through the cooling pipe.

5. The ignition monitoring method for a boiler burner according to claim 4, characterized in that: The cooling tube is provided with two through holes on a side away from the burner, which are a first through hole and a second through hole. The first through hole is used for communicating with an external oxygen tank, and the second through hole is used for communicating with an external air compressor.

6. The ignition monitoring method for a boiler burner according to claim 4 or 5, characterized in that: The flow rate of the oxygen is 1 m / s to 30 m / s, and the intake pressure of the oxygen is 0.001 kpa to 0.1 kpa; and / or, The flow rate of the clean air is 10m / s to 30m / s, and the intake pressure of the clean air is 0.01kpa to 0.1kpa.

7. The ignition monitoring method for a boiler burner according to claim 4 or 5, characterized in that: The ignition temperature probe is an ultraviolet flame detector.

8. The ignition monitoring method for a boiler burner according to claim 1, characterized in that: The pressure of the gas is 0.02kpa to 2.0kpa; and / or, The pressure of the air is 0.1 kpa to 1.0 kpa.

9. The ignition monitoring method for a boiler burner according to claim 1, characterized in that: The burner includes a shell, a gas component, an air component and an ignition monitoring system. The ignition monitoring system includes a temperature detection component and an ignition component. The ignition component includes a fire tube, a combustion head and a nozzle. The shell forms an air supply channel. The fire tube forms a accommodating cavity. The fire tube is connected to the shell. The combustion head is arranged in the accommodating cavity and communicated with the air supply channel. The gas component and the air component are respectively connected and arranged in the air supply channel. The sensing part of the ignition temperature probe is located in the air supply channel; the nozzle is connected and arranged on the combustion head.

10. The ignition monitoring method for a boiler burner according to claim 9, characterized in that: The ignition monitoring system further comprises a control module, an ignition electrode is arranged in the combustion head, and the control module is electrically connected to the ignition electrode and the ignition temperature probe respectively; and / or, The number of the nozzles is at least two.

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