Detection device and combustion system

Abstract

To enable back fire to be detected more appropriately in a combustion device.SOLUTION: A detection device 10 for detecting back fire in a combustion chamber 31 that combusts fuel supplied from a supply port, comprises: a conduit pipe 11 connected to the inside of the combustion chamber 31 via an opening part 111 provided in a side wall of the combustion chamber 31; a sensor unit 21 that measures a physical quantity inside the combustion chamber 31 via the conduit pipe 11; and a detection unit 22 that detects back fire in the combustion chamber 31 based on a measurement value of the physical quantity measured by the sensor unit 21. The conduit pipe 11 comprises an opening / closing unit 14 capable of opening and closing the internal space between the combustion chamber 31 and the sensor unit 21.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a detection device and a combustion system. [Background technology]

[0002] A detection device is known for detecting flashbacks that occur in gas turbines equipped with combustion devices that use a lean premixed combustion method. Flashbacks are a phenomenon in which a flame advances faster than the speed of fluids such as fuel and air, and the flame advances upstream through the fluid. In principle, flashbacks can occur in gas turbines that use natural gas as fuel, but it is easy to suppress flashbacks by restricting the operating conditions.

[0003] In recent years, there has been an increasing demand for hydrogen-fired gas turbines that use a mixture of natural gas and hydrogen gas, or hydrogen gas alone, as fuel, in order to realize a hydrogen society. Hydrogen gas has a faster burning speed than natural gas. Therefore, in hydrogen-fired gas turbines, flashbacks are more likely to occur than in gas turbines that consume natural gas as fuel gas. Increasing the concentration of hydrogen gas in the fuel gas narrows the conditions under which flashbacks do not occur, making it difficult to completely suppress flashbacks in practical operation.

[0004] In order to suppress flashbacks, research has been conducted on combustion devices equipped with multiple burners (fuel nozzles) called cluster burners. However, as the hydrogen gas concentration of the fuel increases, it becomes difficult to completely suppress the occurrence of flashbacks even when cluster burners are used.

[0005] Patent document 1 describes a combustion control device that is used in a combustion system and stops the fuel supply to a staging block including a main fuel nozzle in which a flashback has occurred based on a detection signal from a flashback detection unit that detects the flashback. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] International Publication No. 2015 / 097861 Summary of the Invention [Problem to be solved by the invention]

[0007] However, the conventional configuration has room for improvement in terms of ease of maintenance and ease of application to a combustion device having a large number of fuel nozzles.

[0008] Therefore, an object of the present disclosure is to enable more appropriate detection of flashback in a combustion device. [Means for solving the problem]

[0009] In some embodiments, the detection device comprises: (1) A detection device for detecting flashback in a combustion chamber in which fuel supplied from a supply port is combusted, comprising: a conduit connecting to the interior of the combustion chamber through an opening in a side wall of the combustion chamber; a sensor unit for measuring a physical quantity inside the combustion chamber through the conduit; a detection unit that detects flashback in the combustion chamber based on the measured value of the physical quantity measured by the sensor unit; Equipped with The conduit includes an opening / closing portion that is capable of opening and closing the internal space between the combustion chamber and the sensor portion.

[0010] In the detection device, the conduit has an opening / closing part that can open and close the internal space between the combustion chamber and the sensor part, so it is possible to close the opening / closing part and replace the sensor part while continuing combustion in the combustion chamber. In addition, the detection device detects flashback by measuring a physical quantity with the sensor part through an opening on the side of the combustion chamber, so it is easily applicable to large-scale combustion equipment equipped with many fuel nozzles. Therefore, it is possible to more appropriately detect flashback in the combustion equipment.

[0011] In one embodiment, (2) In the detection device of (1), The conduit may be connected to the interior of the combustion chamber through an opening provided in the side wall of the combustion chamber downstream of the supply port and upstream of a reference flame surface that is generated when the fuel is combusted normally in the combustion chamber.

[0012] In this way, the conduit is connected to the combustion chamber at a position downstream of the fuel supply port and upstream of the reference flame surface that occurs when the fuel is burned normally without flashback, so that the sensor unit measures the physical quantity in an area where the physical quantity changes drastically between when flashback occurs and when no flashback occurs, thereby making it possible to detect the occurrence of flashback with high accuracy.

[0013] In one embodiment, (3) In the detection device of (1) or (2), determining whether or not maintenance of the sensor unit is required based on a comparison between an average value of the measured values ​​of the physical quantities measured by the sensor unit and a predetermined threshold value; When it is determined that maintenance of the sensor unit is necessary, a notification is given that maintenance of the sensor unit is necessary. The device may further include a suggestion unit.

[0014] Therefore, when maintenance of the sensor unit is necessary, the detection device can notify the user of this fact.

[0015] In one embodiment, (4) In the detection device of (1) or (2), estimating a time when maintenance of the sensor unit is required based on a measurement value of the physical quantity measured by the sensor unit; notifying a user of the estimated time; The device may further include a suggestion unit.

[0016] In this way, the detection device can notify the user when maintenance of the sensor unit is required.

[0017] In one embodiment, (5) In any one of the detection devices according to (1) to (4), The sensor unit may measure a temperature, an optical spectrum, a pressure, or an acoustic pressure inside the combustion chamber.

[0018] In this manner, the detection device can detect flashback by implementing the sensor unit using a temperature sensor, an optical spectrum sensor, a pressure sensor, a sound pressure sensor, or the like.

[0019] In one embodiment, (6) In any one of the detection devices according to (1) to (5), The opening and closing portion may be a gate type or ball type valve.

[0020] In this way, by realizing the opening / closing section using a gate-type or ball-type valve, etc., it is possible to prevent the opening / closing section from obstructing the optical path when the opening / closing section is open when the sensor section is realized using an optical spectrum sensor.

[0021] In one embodiment, (7) In any one of the detection devices according to (1) to (6), The combustion engine may further include a signal output unit that outputs a signal indicating the occurrence of flashback to a control system that controls the supply of the fuel to the supply port in response to the detection unit detecting flashback in the combustion chamber.

[0022] In this way, upon detecting a flashback, the detection device notifies the control system that controls the fuel supply of the occurrence of a flashback, so that the control system can take control measures to respond to the flashback, such as stopping the fuel supply.

[0023] In some embodiments, the combustion system includes: (8) a combustion chamber for burning the fuel supplied from the supply port; a detection device for detecting flashback in the combustion chamber; Equipped with The detection device includes: a conduit connecting to the interior of the combustion chamber through an opening in a side wall of the combustion chamber; a sensor unit for measuring a physical quantity inside the combustion chamber through the conduit; a detection unit that detects flashback in the combustion chamber based on the measured value of the physical quantity measured by the sensor unit; Equipped with The conduit includes an opening / closing portion that is capable of opening and closing the internal space between the combustion chamber and the sensor portion.

[0024] In this way, the conduit of the combustion system is provided with an opening / closing part that can open and close the internal space between the combustion chamber and the sensor part, so it is possible to close the opening / closing part and replace the sensor part while continuing combustion in the combustion chamber. In addition, since the detection device detects flashback by measuring a physical quantity with the sensor part through an opening on the side of the combustion chamber, it is easily applicable to large-scale combustion equipment equipped with many fuel nozzles. Therefore, it is possible to more appropriately detect flashback in the combustion equipment.

[0025] In one embodiment, In the combustion system of (9)(8), The combustion chamber may be supplied with fuel from a plurality of fuel nozzle outlets serving as the fuel supply port.

[0026] In this way, even when fuel is supplied to the combustion chamber from multiple fuel nozzles, flashback is detected by measuring physical quantities inside the combustion chamber through an opening provided in the side wall of the combustion chamber, making it possible to detect flashback even in large-scale combustion equipment.

[0027] In one embodiment, (10) In the combustion system according to (8) or (9), The supply of the fuel to the supply port may be controlled in response to the detection device detecting flashback.

[0028] In this way, the fuel supply is controlled in response to flashback detection, so that accidents caused by flashback can be prevented. Effect of the Invention

[0029] According to an embodiment of the present disclosure, flashback can be more appropriately detected in a combustion device. [Brief description of the drawings]

[0030] [Figure 1] FIG. 1 is a diagram illustrating an example of the configuration of a combustion system according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] <Comparative Example> The combustion device according to the comparative example equipped with a cluster burner detects the occurrence of flashback by measuring the temperature near each burner with a temperature detector, and controls the supply of fuel and air. Methods for detecting flashback by optical means include a method using an optical sensor, and a method for optically measuring temperature with a thermopile. In such methods, as the device continues to be used, dirt in the combustion device, including molten metal, adheres to the sensing element, or to the lens provided in the optical path between the flame, which is the source of light, and the sensing element, as well as to the parts intended to protect the sensing element, including the observation window. As a result, in the combustion device according to the comparative example, the light transmittance decreases as the device continues to be used, and there is a possibility that flashback cannot be detected properly. Therefore, when detecting flashback by such optical means, it is necessary to periodically clean the parts provided in the optical path. However, since the parts in the combustion device on which dirt adheres are in contact with the space inside the combustion chamber, large-scale maintenance such as stopping the combustion device is required to clean them. In practical operation, such maintenance cannot be performed frequently, so it is extremely difficult to continuously detect flashback by optical means.

[0032] Furthermore, in a combustion apparatus equipped with many burners, such as a hydrogen gas-fueled combustion apparatus equipped with a cluster burner, a temperature sensor and associated wiring are required for each burner in order to detect flashback in each burner. In a combustion apparatus with limited space, it is difficult to install such temperature sensors and wiring. Therefore, in the combustion apparatus according to the comparative example, the number of burners limits the scope of application of the configuration for detecting flashback.

[0033] An object of the present disclosure is to enable flashback detection to be performed appropriately over the long term without extensive maintenance and without placing an upper limit on the number of burners in a combustion device.

[0034] <Embodiment> Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In each drawing, parts having the same configuration or function are denoted by the same reference numerals. In the description of this embodiment, duplicated descriptions of the same parts may be omitted or simplified as appropriate.

[0035] 1 is a diagram showing an example of the configuration of a combustion system 1 according to one embodiment. The combustion system 1 includes a detection device 10 and a combustion device 30. The combustion device 30 combusts a mixture of air and fuel gas. The detection device 10 detects flashback in the combustion device 30. Flashback occurs when a flame in a combustion chamber 31 advances through a fuel nozzle 32 in a direction from the combustion chamber 31 toward the inside of the fuel nozzle 32.

[0036] The combustion device 30 includes a combustion chamber 31 and a plurality of fuel nozzles 32. The fuel nozzle 32 includes a fuel supply port and supplies a mixture of air and fuel gas to the combustion chamber 31. The combustion chamber 31 has a space for burning the mixture gas supplied from the fuel nozzle 32. In this embodiment, the fuel is hydrogen gas, but is not limited thereto. For example, the fuel may be a mixture of hydrogen gas and natural gas, natural gas, or any fluid that can be used as a fuel. In this embodiment, the combustion device 30 includes a plurality of fuel nozzles 32, but the number of fuel nozzles 32 may be one.

[0037] When the combustion device 30 performs a combustion operation, each fuel nozzle 32 supplies fuel to the combustion chamber 31. In the combustion chamber 31, the supplied fuel is burned to form a flame 80. The flame 80 has an outer flame 81, an inner flame 82, and a flame surface 83. The outer flame 81 is a region of the flame 80 where the temperature is high. The inner flame 82 is a region of the flame 80 where the temperature is low. The flame surface 83 is a boundary surface of the flame 80 close to the fuel nozzle 32. Hereinafter, the flame surface 83 when no flashback occurs in the combustion chamber 31 and normal combustion is occurring may be referred to as a "reference flame surface." In general, the outer flame 81, which has a high temperature, is formed near the tip of the flame 80, far from the fuel nozzle 32. The inner flame 82, which has a low temperature, is formed near the flame surface 83, which is close to the fuel nozzle 32. As will be described later, when a flashback occurs, the flame surface 83 moves upstream from the reference flame surface. Therefore, the detection device 10 measures a physical quantity at a position downstream of the end of the fuel nozzle 32 facing the combustion chamber 31 and upstream from the reference flame surface, and detects flashback from a change in the measured physical quantity.

[0038] The detection device 10 includes a conduit 11 and an apparatus body 20. The apparatus body 20 includes a sensor unit 21, a detection unit 22, a proposal unit 23, a control unit 24, and a signal output unit 25.

[0039] The conduit 11 is a hollow member that connects the inside of the combustion chamber 31 with the sensor unit 21 of the device body 20. As shown in Fig. 1, the conduit 11 is connected to the inside of the combustion chamber 31 through an opening 111 provided in the side wall of the combustion chamber 31. The conduit 11 is provided with an opening / closing unit 14 that can open / close the internal space of the conduit 11 between the combustion chamber 31 and the sensor unit 21 to close it.

[0040] The sensor unit 21 measures a physical quantity in the combustion chamber 31 through the internal space of the conduit 11. The detection unit 22 detects flashback in the combustion chamber 31 based on the measured value of the physical quantity measured by the sensor unit 21. For example, the sensor unit 21 may be configured with a thermopile (temperature sensor), an optical sensor (optical spectrum sensor), a pressure sensor, or an acoustic sensor (sound pressure sensor). The thermopile is a temperature sensor in which a large number of minute thermocouples that measure temperature by infrared rays are arranged in a planar shape. The thermopile measures the temperature at a predetermined position across a space. When the sensor unit 21 is configured with a thermopile, the detection unit 22 detects flashback based on the temperature measured by the sensor unit 21. The optical sensor measures light emitted from a predetermined position. When the sensor unit 21 is realized with an optical sensor, the detection unit 22 detects flashback at a predetermined position from the received optical spectrum. The pressure sensor measures the pressure in the combustion chamber 31. When the sensor unit 21 is realized by a pressure sensor, the detection unit 22 detects flashback based on a change in pressure. The acoustic sensor measures a sound pressure spectrum. When the sensor unit 21 is realized by an acoustic sensor, the detection unit 22 detects flashback based on a change in sound pressure spectrum.

[0041] The opening 111 may be provided at a position facing the flame front 83 during normal operation so that the sensor unit 21 and the detection unit 22 can detect flashback by movement of the flame front 83 in the combustion chamber 31. For example, the opening 111 may be provided downstream of the end of the fuel nozzle 32 constituting the combustion device 30 that faces the combustion chamber 31, on the side of the combustion chamber 31 where a position upstream of the flame front 83 (reference flame front) during normal operation can be observed.

[0042] The opening / closing unit 14 is a valve that does not obstruct the optical path between the flame 80 in the combustion chamber 31 and the sensor unit 21. For example, the opening / closing unit 14 may be a gate-type or ball-type valve.

[0043] The suggestion unit 23 suggests to the user when to clean or replace the sensor unit 21. Specifically, the suggestion unit 23 may determine whether or not maintenance of the sensor unit 21 is necessary based on a comparison between an average value of the measured values ​​of the physical quantities measured by the sensor unit 21 and a predetermined threshold value. When it is determined that maintenance of the sensor unit 21 is necessary, the suggestion unit 23 may notify the user that maintenance of the sensor unit 21 is necessary. For example, the suggestion unit 23 may display an image indicating that maintenance is necessary on a display or output an alarm sound from a speaker. Alternatively, the suggestion unit 23 may transmit information indicating that maintenance is necessary to a computer used by the user via a predetermined communication means.

[0044] The control unit 24 is one or more processors. The control unit 24 controls the operation of each component of the detection device 10. For example, the control unit 24 may control the opening and closing of the opening / closing unit 14. Furthermore, the control unit 24 may control the operation of the combustion device 30 in addition to controlling the operation of the detection device 10. For example, the control unit 24 may control the fuel discharged from the fuel nozzle 32 in response to the detection of flashback.

[0045] When the detector 22 detects flashback in the combustion chamber 31, the signal output unit 25 outputs a signal indicating the occurrence of flashback to a control system that controls the supply of fuel to the fuel nozzle 32.

[0046] Each component of the device main body 20 may be realized by a processor executing a program.

[0047] If the temperature of the air in the combustion chamber 31 is higher than the rated temperature of the opening / closing section 14, the distance between the opening / closing section 14 and the combustion chamber 31 may be increased by extending the conduit 11 to an appropriate length in order to lower the temperature of the air in the opening / closing section 14.

[0048] Since the detection device 10 includes an opening / closing unit 14 capable of opening and closing the internal space between the combustion chamber 31 and the sensor unit 21 in the conduit 11, it is possible to replace the sensor unit 21 by closing the opening / closing unit 14 while continuing combustion in the combustion chamber 31. Furthermore, since the detection device 10 detects flashback by measuring a physical quantity using the sensor unit 21 from the opening 111 on the side surface of the combustion chamber 31, it is easily applicable to a large-scale combustion device 30 provided with a large number of fuel nozzles 32. Therefore, the combustion system 1 makes it possible to appropriately detect flashback over the long term without large-scale maintenance and without setting an upper limit on the number of fuel nozzles 32 in the combustion device 30.

[0049] The operation of the detection device 10 according to the present embodiment will be described in detail below. Flashback is the movement of the flame front 83 towards the fuel nozzle 32.

[0050] When sensor unit 21 is a thermopile, and the combustion device 30 is performing normal combustion that does not involve flashback, sensor unit 21 measures the temperature of inner flame 82, which is a low-temperature region in flame 80. When flashback occurs, flame front 83 moves toward fuel nozzle 32. As a result, sensor unit 21 measures the temperature of outer flame 81, which is a high-temperature region in flame 80. Detection device 10 detects flashback from such a change in the temperature measurement value.

[0051] In the case where the sensor unit 21 is an optical sensor, when the combustion device 30 is performing normal combustion without flashback, the sensor unit 21 measures the optical spectrum of the inner flame 82. When flashback occurs, the flame front 83 moves toward the fuel nozzle 32. As a result, the sensor unit 21 measures the optical spectrum of the outer flame 81. The detection device 10 detects flashback from such a change in the optical spectrum.

[0052] In the case where the sensor unit 21 is a pressure sensor, the pressure in the combustion chamber 31 fluctuates when flashback occurs in the combustion chamber 31. The detection device 10 detects flashback by measuring this pressure fluctuation.

[0053] In the case where the sensor unit 21 is an acoustic sensor, when flashback occurs in the combustion chamber 31, a detonation state occurs due to the movement of the flame 80 exceeding the speed of sound. Therefore, when flashback occurs, the surrounding sound pressure spectrum changes, and an explosion sound is detected outside. Therefore, the detection device 10 detects flashback by measuring the change in the sound pressure spectrum corresponding to such an explosion sound.

[0054] When the detection device 10 is used for a long period of time, dirt such as molten metal in the combustion chamber 31 adheres to the part of the sensor unit 21 facing the space in the combustion chamber 31. This reduces the detection sensitivity of physical quantities such as light (including infrared rays), pressure, and sound pressure that the sensor unit 21 can measure, and reduces the ability of the detection device 10 to detect flashback. When the performance of the detection device 10 deteriorates, the opening and closing unit 14 may be closed to block the internal space of the conduit 11. By closing the opening and closing unit 14, the sensor unit 21 can be safely removed from the conduit 11 and the sensor unit 21 can be cleaned even if the combustion device 30 is in operation. Furthermore, the detection device 10 can be operated again by reattaching the sensor unit 21 to the conduit 11 and opening the opening and closing unit 14.

[0055] As dirt adheres to the sensor unit 21, the detection sensitivity of the physical quantities that can be measured by the sensor unit 21 decreases. Therefore, the suggestion unit 23 may determine that maintenance is necessary when the average value of the measurements of the physical quantities measured by the sensor unit 21 falls below a predetermined threshold value. When it is determined that maintenance of the sensor unit 21 is necessary, the suggestion unit 23 may notify the user that maintenance of the sensor unit 21 is necessary. Furthermore, the suggestion unit 23 may periodically measure the average value of the measurements of the physical quantities measured by the sensor unit 21, predict the time to replace the sensor unit 21 based on a change in this average value, and notify the user of the prediction.

[0056] The sensor unit 21 may include two or more sensors selected from a variety of sensors including a thermopile, an optical sensor, a pressure sensor, and an acoustic sensor, and the detection unit 22 may detect flashback based on the measured values ​​of the sensors. This allows the detection device 10 to detect flashback with high accuracy.

[0057] As described above, the detection device 10 detects flashback in the combustion chamber 31 in which fuel supplied from the supply port (fuel nozzle 32) is combusted. The detection device 10 includes the conduit 11, the sensor unit 21, and the detection unit 22. The conduit 11 is connected to the inside of the combustion chamber 31 through an opening 111 provided in the side wall of the combustion chamber 31. The sensor unit 21 measures a physical quantity inside the combustion chamber 31 through the conduit 11. The detection unit 22 detects flashback in the combustion chamber 31 based on the measured value of the physical quantity measured by the sensor unit 21. Here, the conduit 11 includes an opening / closing unit 14 capable of opening and closing the internal space between the combustion chamber 31 and the sensor unit 21.

[0058] In this way, the conduit 11 of the detection device 10 includes an opening / closing section 14 that can open and close the internal space between the combustion chamber 31 and the sensor section 21. When the detection device 10 is used for a long period of time, dirt adheres to the sensor section 21, and the flashback detection capability decreases. However, by closing the opening / closing section 14, the sensor section 21 can be removed even while the combustion device 30 is in operation, and the sensor section 21 can be cleaned or replaced. As a result, the detection device 10 can continue to detect flashback for a long period of time without large-scale maintenance. Furthermore, the detection device 10 can remotely monitor the presence or absence of flashback in the multiple fuel nozzles 32 via the conduit 11, and there is no need to install wiring inside the combustion device 30. Therefore, the detection device 10 can appropriately detect flashback without setting an upper limit on the number of fuel nozzles 32 in the combustion device 30.

[0059] The conduit 11 may be connected to the inside of the combustion chamber 31 through an opening 111 provided in a sidewall of the combustion chamber 31 downstream of the supply port (fuel nozzle 32) and upstream of a reference flame surface that occurs when fuel is burned in the combustion chamber 31. As described above, the reference flame surface is the flame surface 83 when normal combustion occurs in the combustion chamber 31 without the occurrence of flashback. In this case, the sensor unit 21 measures the physical quantity in an area where the physical quantity changes drastically between when flashback does not occur and when flashback occurs. Therefore, such a detection device 10 can detect the occurrence of flashback with high accuracy.

[0060] Furthermore, the suggestion unit 23 may determine whether maintenance of the sensor unit 21 is necessary based on a comparison between an average value of the measured values ​​of the physical quantities measured by the sensor unit 21 and a predetermined threshold value, and may notify the user of the necessity of maintenance when it is determined that maintenance is necessary. The maintenance of the sensor unit 21 may include cleaning and replacement of the sensor unit 21. Therefore, with such a configuration, the user can know when maintenance of the sensor unit 21 is necessary.

[0061] Furthermore, the suggestion unit 23 may estimate the time when maintenance of the sensor unit 21 will be required based on the measurement values ​​of the physical quantities measured by the sensor unit 21, and notify the user of the estimated time. For example, the detection device 10 may acquire in advance change data regarding changes in the measurement values ​​of the physical quantities due to use of the sensor unit 21 over time, and compare the measurement values ​​of the sensor unit 21 with the change data to estimate the time when maintenance will be required. With such a configuration, the user can know the time when maintenance of the sensor unit 21 will be required and make a maintenance plan.

[0062] Furthermore, the sensor unit 21 may measure the temperature, the optical spectrum, the pressure, or the sound pressure inside the combustion chamber 31. With such a configuration, the detection device 10 can detect flashback in the combustion chamber 31 using various physical quantities.

[0063] Furthermore, the opening / closing unit 14 may be a gate type (slide type) or ball type (a type in which a ball with a hole is rotated) valve. The opening / closing unit 14 may be realized by a gate type or ball type valve, etc., to detect flashback. Furthermore, when the sensor unit 21 is realized by a thermopile or optical sensor, the opening / closing unit 14 may be realized by a gate type or ball type valve, making it possible to measure a physical quantity without obstructing the optical path. When the sensor unit 21 is realized by a sensor that does not use light, the opening / closing unit 14 may be realized by any valve.

[0064] Furthermore, in response to detection unit 22 detecting flashback in combustion chamber 31, control unit 24 may output a signal indicating the occurrence of flashback from signal output unit 25 to a control system that controls the supply of fuel to the supply port. In response to detection of flashback, detection device 10 notifies the control system that controls fuel supply of the occurrence of flashback, so that the control system can perform control in response to the flashback, such as stopping the fuel supply.

[0065] Furthermore, in the combustion system 1, the combustion chamber 31 may be supplied with fuel from the discharge ports of a plurality of fuel nozzles 32 as fuel supply ports. Even when fuel is supplied to the combustion chamber 31 from a plurality of fuel nozzles 32 in this way, the combustion system 1 detects flashback by measuring a physical quantity inside the combustion chamber 31 via an opening 111 provided in a side wall of the combustion chamber 31. Therefore, the combustion system 1 makes it possible to detect flashback even in a large-scale combustion device 30.

[0066] Furthermore, the combustion system 1 may control the supply of fuel to the supply port in response to the detection of flashback by the detection device 10. In this manner, the combustion system 1 controls the fuel supply in response to the detection of flashback, and therefore, accidents caused by flashback can be prevented.

[0067] The present disclosure is not limited to the above-described embodiment. For example, multiple blocks shown in the block diagram may be integrated, or one block may be divided. Other modifications are possible without departing from the spirit of the present disclosure. [Explanation of symbols]

[0068] 1 Combustion system 10. Detection Device 11 Conduit 111 Opening 14 Opening and closing section 20. Device body 21 Sensor section 22 Detection unit 23 Proposal Department 24 Control Unit 25 Signal output section 30 Combustion equipment 31 Combustion chamber 32 Fuel nozzle 80 Flame 81 External Inflammation 82 Internal inflammation 83 Flame Surface

Claims

1. A detection device for detecting flashback in a combustion chamber in which fuel supplied from a supply port is combusted, comprising: a conduit connecting to the interior of the combustion chamber through an opening in a side wall of the combustion chamber; a sensor unit for measuring a physical quantity inside the combustion chamber through the conduit; a detection unit that detects flashback in the combustion chamber based on the measured value of the physical quantity measured by the sensor unit; Equipped with The conduit includes an opening / closing portion capable of opening and closing an internal space between the combustion chamber and the sensor portion. Detection device.

2. 2. The detection device of claim 1, wherein the conduit is connected to the interior of the combustion chamber through the opening provided in the side wall of the combustion chamber downstream of the supply port and upstream of a reference flame surface that is generated when the fuel is normally combusted in the combustion chamber.

3. determining whether or not maintenance of the sensor unit is required based on a comparison between an average value of the measured values ​​of the physical quantities measured by the sensor unit and a predetermined threshold value; When it is determined that maintenance of the sensor unit is necessary, a notification is given that maintenance of the sensor unit is necessary. The detection device according to claim 1 , further comprising a suggestion unit.

4. estimating a time when maintenance of the sensor unit is required based on a measurement value of the physical quantity measured by the sensor unit; notifying a user of the estimated time; The detection device according to claim 1 , further comprising a suggestion unit.

5. The detection device according to claim 1 , wherein the sensor unit measures a temperature, a light spectrum, a pressure, or a sound pressure inside the combustion chamber.

6. The detection device according to claim 1 , wherein the opening and closing portion is a gate-type or ball-type valve.

7. 2. The detection device according to claim 1, further comprising a signal output unit that outputs a signal indicating an occurrence of flashback to a control system that controls the supply of the fuel to the supply port in response to the detection unit detecting flashback in the combustion chamber.

8. a combustion chamber for burning the fuel supplied from the supply port; a detection device for detecting flashback in the combustion chamber; Equipped with The detection device includes: a conduit connecting to the interior of the combustion chamber through an opening in a side wall of the combustion chamber; a sensor unit for measuring a physical quantity inside the combustion chamber through the conduit; a detection unit that detects flashback in the combustion chamber based on the measured value of the physical quantity measured by the sensor unit; Equipped with The conduit includes an opening / closing portion capable of opening and closing an internal space between the combustion chamber and the sensor portion. Combustion system.

9. The combustion system according to claim 8 , wherein the combustion chamber is supplied with fuel from a plurality of fuel nozzle outlets as the fuel supply ports.

10. The combustion system of claim 8 , further comprising: controlling the supply of fuel to the supply port in response to the detection device detecting flashback.

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