WO2024048006A1 - Combustion equipment - Google Patents
Combustion equipment Download PDFInfo
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- WO2024048006A1 WO2024048006A1 PCT/JP2023/021916 JP2023021916W WO2024048006A1 WO 2024048006 A1 WO2024048006 A1 WO 2024048006A1 JP 2023021916 W JP2023021916 W JP 2023021916W WO 2024048006 A1 WO2024048006 A1 WO 2024048006A1
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- WIPO (PCT)
- Prior art keywords
- oxygen concentration
- furnace
- air
- combustion
- burner
- Prior art date
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 116
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 119
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 119
- 239000001301 oxygen Substances 0.000 claims abstract description 119
- 239000000446 fuel Substances 0.000 claims description 44
- 239000002737 fuel gas Substances 0.000 abstract description 20
- 239000007789 gas Substances 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 229910002091 carbon monoxide Inorganic materials 0.000 description 5
- 239000004071 soot Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Definitions
- the present invention adjusts the ratio of gaseous or liquid fuel supplied through a fuel supply pipe and combustion air supplied through an air supply pipe, and supplies the burner with the air ratio control system.
- the present invention relates to a combustion equipment that injects fuel and combustion air into a furnace for combustion.
- the fuel supplied to the burner and the combustion It is characterized in that a good combustion state can be stably obtained by appropriately controlling the ratio with air.
- fuel supplied through a fuel supply pipe and combustion air supplied through an air supply pipe are supplied to a burner at a predetermined ratio, and from this burner, fuel and combustion air are supplied into the furnace. It blows out air and burns it.
- the pressure and valve opening are controlled in the furnace using a regenerative burner.
- the burner's actual flow coefficient it is possible to treat the burner's flow coefficient as an actual value that matches changes in the state of the fluid, thereby controlling the combustion amount while keeping the air ratio in the furnace constant. This is shown here.
- the actual flow coefficient of the burner is determined by actually measuring the pressure and the valve opening, and the flow coefficient of the burner is treated as an actual value that matches the change in the state of the fluid. For example, when the amount of air entering the furnace changes significantly, such as when opening and closing the furnace door, the oxygen concentration inside the furnace changes greatly. It is very difficult to maintain a constant air ratio. For example, when the furnace door is opened and the amount of air entering the furnace increases significantly, it is difficult to maintain a constant air ratio within the furnace.
- Patent Document 2 Furthermore, in the conventional method of operating a continuous heating furnace equipped with a plurality of combustion zones each having combustion burners, as shown in Patent Document 2, some burners in the combustion zones are extinguished or operated in a low load state. It has been shown that at least the target value of oxygen concentration in the combustion zone concerned is determined when the combustion zone is in use, and the air ratio of each combustion zone on the upstream side is controlled based on the target value.
- An oxygen concentration meter and a CO concentration meter are installed on the exhaust gas outlet side, and when burners in some combustion zones are extinguished or operating under low load, at least the target value of oxygen concentration in the combustion zone is determined, and the The air ratio of each combustion zone on the upstream side is determined based on the target value, and either the CO concentration target value or the oxygen concentration target value is set according to the determined air ratio, and the set target value and the oxygen concentration meter are set. It is shown that either the oxygen concentration or the CO concentration is controlled based on the measured value of the oxygen concentration meter and the measured value of the CO concentration meter.
- an oxygen concentration meter and a CO concentration meter are provided on the flue gas outlet side of each combustion zone as described above, and burners in some combustion zones are extinguished or operated in a low load state.
- the furnace shown in Patent Document 1 is used. Similar to opening and closing the door, if the amount of air entering the furnace changes significantly and the oxygen concentration inside the furnace changes greatly, you can quickly respond and keep the air ratio in the furnace constant.
- the present invention adjusts the ratio of fuel supplied through a fuel supply pipe and combustion air supplied through an air supply pipe to a burner, and supplies the burner with fuel into the furnace.
- the object of the present invention is to solve the above-mentioned problems in a combustion equipment that blows out combustion air and burns the fuel and combustion air at an appropriate air ratio in a furnace.
- the present invention can be used in combustion equipment as described above, in which the amount of air entering the furnace changes significantly, such as when opening and closing the furnace door, and the oxygen concentration within the furnace changes significantly. Even in such cases, it is an object of the present invention to appropriately control the ratio of the fuel supplied to the burner and the combustion air so that a good combustion state can be stably obtained.
- the ratio of the fuel supplied through the fuel supply pipe and the combustion air supplied through the air supply pipe is adjusted by an air ratio control system.
- an oxygen concentration sensor is provided to detect the oxygen concentration in the furnace, and the oxygen concentration sensor The detected oxygen concentration in the furnace is outputted to the air ratio control system by the output control device, and the air ratio control system adjusts the ratio of fuel and combustion air to be supplied to the burner.
- the above-mentioned The oxygen concentration in the furnace detected by the oxygen concentration sensor is not outputted to the air ratio control system by the output control device, but the air ratio control system controls the fuel and combustion air to be supplied to the burner.
- the output control device outputs the oxygen concentration to the air ratio control system, and the air ratio control system controls the ratio of fuel to combustion air supplied to the burner. .
- the oxygen concentration in the furnace is detected by the oxygen concentration sensor as described above, and the oxygen concentration in the furnace detected by the oxygen concentration sensor is transmitted from the output device to the oxygen concentration in the furnace. Since the output is output to the ratio control system and the amount of fuel and combustion air supplied to the burner is adjusted by the air ratio control system, even when the oxygen concentration in the furnace is likely to change, the above-mentioned
- the air ratio control system keeps the air ratio in the furnace at a predetermined value by adjusting the ratio of the fuel supplied to the burner and the combustion air so that the oxygen concentration in the furnace does not change. Combustion can be performed.
- the air ratio control system controls the fuel and combustion air to be supplied to the burner. Even if the door installed in the furnace is opened and the oxygen concentration inside the furnace detected by the oxygen concentration sensor increases significantly, the air ratio control system The air ratio control system ensures that the proportion of combustion air supplied to the burner is not significantly reduced and that the fuel is completely combusted. (in other words, incomplete combustion), preventing unburned gas from being discharged from the furnace to the outside, and preventing soot and carbon monoxide from being generated.
- the oxygen concentration in the furnace detected by the oxygen concentration sensor is The output control device outputs an output to the air ratio control system, which causes the air ratio control system to restore the ratio of fuel to combustion air supplied to the burner, so that the furnace Stable combustion can be achieved by returning the air ratio to the original predetermined value.
- the oxygen concentration in the furnace is detected by the oxygen concentration sensor as described above, and the oxygen concentration in the furnace detected by the oxygen concentration sensor is transmitted from the output device to the air ratio control.
- the air ratio control system adjusts the amount of fuel and combustion air supplied to the burner, so even if the oxygen concentration in the furnace changes, the air ratio
- stable combustion can be achieved by setting the air ratio in the furnace to a predetermined value.
- the output control device outputs the oxygen concentration in the air to the air ratio control system, and the air ratio control system controls the ratio of the fuel to the combustion air to be supplied to the burner.
- the proportion of combustion air supplied to the burner is greatly reduced and the fuel is This prevents complete combustion from occurring, prevents unburned gas from being discharged from the furnace to the outside, and prevents soot and carbon monoxide from being generated.
- the oxygen concentration of Stable combustion can be achieved by returning the ratio to its original predetermined value.
- FIG. 2 is a schematic explanatory diagram showing a state in which the ratio of fuel gas, which is fuel supplied to a burner, and combustion air is adjusted, and the fuel gas and combustion air are ejected from the burner into a furnace to be combusted.
- (A) is when the door provided in the furnace is opened and the oxygen concentration in the furnace detected by the oxygen concentration sensor increases significantly.
- FIG. 2 A schematic explanation showing a state in which the output control device does not output the oxygen concentration to the air ratio control system, and the air ratio control system maintains the ratio of the fuel gas supplied to the burner and the combustion air for combustion.
- Figure 2 (B) shows that when the door that is open as described above is closed and the oxygen concentration in the furnace detected by the oxygen concentration sensor returns to the predetermined value, the The output control device does not output the oxygen concentration in the burner to the air ratio control system, and the air ratio control system maintains the ratio of fuel gas supplied to the burner to combustion air to perform combustion. It is a schematic explanatory diagram.
- FIG. 4 is a timing chart showing changes in oxygen concentration and air ratio in the burner.
- combustion equipment according to the present invention is not limited to that shown in the embodiments below, and can be implemented with appropriate modifications within the scope of the gist of the invention.
- combustion air Air is supplied through an air supply pipe 40, and the combustion air Air and fuel gas G are ejected from the burner 20 into the furnace 10 for combustion. I have to.
- the fuel gas G is supplied to the burner 20 through the fuel supply pipe 30 as described above, and the combustion air Air is supplied through the air supply pipe 40.
- the air ratio control system 50 adjusts the flow rate adjustment valve 31 provided in the pipe 30 and the flow rate adjustment valve 41 provided in the air supply pipe 40 to adjust the ratio of the fuel gas G and combustion air Air supplied to the burner 20.
- the air ratio in the burner 20 is adjusted to a predetermined value, and the fuel gas G and combustion air Air are ejected from the burner 20 into the furnace 10 for combustion.
- the combustion equipment in this embodiment is provided with an oxygen concentration sensor 51 that detects the oxygen concentration in the furnace 10, and the oxygen concentration in the furnace 10 detected by the oxygen concentration sensor 51 is controlled by the output control device 52.
- the air ratio control system 50 controls the flow rate regulating valve 31 provided in the fuel supply pipe 30 and the air supply pipe 40.
- the ratio of the fuel gas G and combustion air Air supplied to the burner 20 is controlled by adjusting the flow rate regulating valve 41 provided in the burner 20, and the air ratio in the burner 20 is adjusted to a predetermined value.
- FIG. 1 shows a state in which the output control device 52 is connected to the air ratio control system 50.
- the output control device 52 outputs the oxygen concentration in the furnace 10 to the air ratio control system 50 and supplies it to the burner 20.
- the ratio of the fuel gas G to the combustion air Air is controlled by the air ratio control system 50, and the amount of combustion air Air supplied to the burner 20 is greatly increased so that the air ratio in the furnace 10 becomes a predetermined value.
- the fuel gas G supplied to the burner 20 is not completely combusted, resulting in unburned gas remaining in the furnace 10 and being discharged to the outside, or generating soot and carbon monoxide. occurs.
- the door 12 of the furnace 10 is opened, and a large amount of external air Air' outside the furnace 10 flows into the furnace 10 through the opening 11 of the furnace 10, and the oxygen concentration sensor 51 detects the If the detected oxygen concentration in the furnace 10 increases significantly, the output control device 52 is turned off and the oxygen concentration detected by the oxygen concentration sensor 51 increases, as shown in FIGS. 2(A) and 3.
- the oxygen concentration in the furnace 10 is not outputted to the air ratio control system 50, and the ratio of the fuel gas G and combustion air Air supplied to the burner 20 is not changed by the air ratio control system 50.
- the air ratio is kept constant.
- FIG. 2(A) and FIG. 2(B), which will be described later, show that the output control device 52 and the air ratio control system 50 are in a disconnected state.
- the door 12 of the furnace 10 that has been opened as described above is closed, and the external air Air' outside the furnace 10 is stopped from flowing into the furnace 10. Even if the oxygen concentration in the furnace 10 is high, as detected by the oxygen concentration sensor 51, the output control device 52 is kept in the OFF state, and the oxygen concentration sensor The oxygen concentration in the furnace 10 detected by the air ratio control system 51 is not outputted to the air ratio control system 50. Note that at this time, the oxygen concentration sensor 51 continues to monitor the oxygen concentration within the furnace 10.
- the output control device 52 When the door 12 of the furnace 10 is closed as described above and the oxygen concentration inside the furnace 10 detected by the oxygen concentration sensor 51 returns to a predetermined value, as shown in FIGS. 1 and 3, , the output control device 52 is turned on, and the oxygen concentration in the furnace 10 detected by the oxygen concentration sensor 51 is outputted to the air ratio control system 50 by the output control device 52 to fix the air ratio. is released, and the air ratio control system 50 adjusts the flow rate adjustment valve 31 provided in the fuel supply pipe 30 and the flow rate adjustment valve 41 provided in the air supply pipe 40 to control the fuel gas G supplied to the burner 20. The ratio between the combustion air and the combustion air Air is controlled so that the air ratio in the burner 20 is adjusted to a predetermined value.
- the timing for turning off the output control device 52 is set to coincide with the timing for opening the door 12 of the furnace 10, as shown in FIG. It is also possible to turn off the device 52 immediately before opening the door 12 of the furnace 10 or immediately after opening the door 12 of the furnace 10.
- the case where the door 12 provided in the furnace 10 is opened and closed is shown as a case in which the oxygen concentration detected by the oxygen concentration sensor 51 changes significantly.
- the case where the detected oxygen concentration changes significantly is not limited to this.
- each burner performs combustion. From the state in which combustion is occurring in the burners, combustion in one or more burners is stopped, and a large amount of cooling air is supplied into the furnace through the cooling air supply pipe around the outer periphery of the fuel nozzle of each burner that has been stopped. Even in a case where the oxygen concentration detected by the oxygen concentration sensor increases significantly, control can be performed in the same manner as in the above embodiment.
Abstract
An air ratio control system 50 adjusts the ratio of fuel gas G and combustion air Air supplied to a burner 20, and when the fuel gas and combustion air are combusted in a furnace 10, the oxygen concentration in the furnace detected by an oxygen concentration sensor 51 is output by an output control device 52 to an air ratio control system to adjust the ratio of fuel gas and combustion air supplied to the burner. Meanwhile, when the oxygen concentration in the furnace detected by the oxygen concentration sensor changes significantly, the output control device does not output the detected oxygen concentration in the furnace to the air ratio control system, and the air ratio control system maintains the ratio of the fuel gas and combustion air supplied to the burner.
Description
本発明は、燃料供給管を通して供給される気体や液体の燃料と、空気供給管を通して供給される燃焼用空気との割合を、空気比制御システムにより調整してバーナーに供給し、前記のバーナーから燃料と燃焼用空気とを炉内に噴出させて燃焼させるようにした燃焼設備に関するものである。特に、炉の扉を開閉させる場合のように、炉内に侵入する侵入空気の量が大幅に変化して、炉内における酸素濃度が大きく変化する場合においても、バーナーに供給する燃料と燃焼用空気との割合を適切に制御して、良好な燃焼状態が安定して得られるようにした点に特徴を有するものである。
The present invention adjusts the ratio of gaseous or liquid fuel supplied through a fuel supply pipe and combustion air supplied through an air supply pipe, and supplies the burner with the air ratio control system. The present invention relates to a combustion equipment that injects fuel and combustion air into a furnace for combustion. In particular, even when the amount of air entering the furnace changes significantly, such as when opening and closing the furnace door, and the oxygen concentration inside the furnace changes greatly, the fuel supplied to the burner and the combustion It is characterized in that a good combustion state can be stably obtained by appropriately controlling the ratio with air.
従来から、燃焼設備においては、燃料供給管を通して供給される燃料と、空気供給管を通して供給される燃焼用空気とを所定の割合にしてバーナーに供給し、このバーナーから炉内に燃料と燃焼用空気とを噴出させて燃焼させるようにしている。
Conventionally, in combustion equipment, fuel supplied through a fuel supply pipe and combustion air supplied through an air supply pipe are supplied to a burner at a predetermined ratio, and from this burner, fuel and combustion air are supplied into the furnace. It blows out air and burns it.
ここで、炉内において燃料と燃焼用空気とが所定の空気比になるようにして燃焼させるにあたり、特許文献１に示されるものにおいては、リジェネバーナーを用いた炉において、圧力、弁開度を実測してバーナーの実流量係数を決定することにより、バーナーの流量係数を流体の状態変化に合わせた実測値として取り扱えるようにして、炉内における空気比を一定に保持したまま燃焼量を制御するようにしたものが示されている。
Here, in order to burn the fuel and combustion air at a predetermined air ratio in the furnace, in the method shown in Patent Document 1, the pressure and valve opening are controlled in the furnace using a regenerative burner. By actually measuring and determining the burner's actual flow coefficient, it is possible to treat the burner's flow coefficient as an actual value that matches changes in the state of the fluid, thereby controlling the combustion amount while keeping the air ratio in the furnace constant. This is shown here.
しかし、特許文献１に示されるものにおいては、圧力、弁開度を実測してバーナーの実流量係数を決定することにより、バーナーの流量係数を流体の状態変化に合わせた実測値として取り扱うため、例えば、炉の扉を開閉させた場合のように、炉内に侵入する侵入空気の量が大幅に変化して、炉内における酸素濃度が大きく変化する場合に、速やかに対応して炉内における空気比を一定化させることは非常に困難であり、例えば、炉の扉を開けて、炉内に侵入する侵入空気の量が大幅に増加した場合において、炉内における空気比を一定化させるように、バーナーに供給する燃焼用空気の割合を減少させて、バーナーにおける空気比を大幅に減少させると、バーナーから未燃ガスが噴出されて、煤や一酸化炭素が発生しやすくなり、操業時における安全性が低下したり、製品や環境に悪影響を及ぼすという問題があった。
However, in the method shown in Patent Document 1, the actual flow coefficient of the burner is determined by actually measuring the pressure and the valve opening, and the flow coefficient of the burner is treated as an actual value that matches the change in the state of the fluid. For example, when the amount of air entering the furnace changes significantly, such as when opening and closing the furnace door, the oxygen concentration inside the furnace changes greatly. It is very difficult to maintain a constant air ratio. For example, when the furnace door is opened and the amount of air entering the furnace increases significantly, it is difficult to maintain a constant air ratio within the furnace. In addition, if the air ratio in the burner is significantly reduced by reducing the proportion of combustion air supplied to the burner, unburned gas will be ejected from the burner, making it easier to generate soot and carbon monoxide, which will cause problems during operation. There have been problems with the safety of products and the environment being adversely affected.
また、従来においては、特許文献２に示されるように、燃焼バーナーを有する複数の燃焼帯を備えた連続式加熱炉の操業方法において、一部の燃焼帯のバーナーが消火又は低負荷状態で操業しているときに、当該燃焼帯での少なくとも酸素濃度の目標値を求め、当該目標値に基づいて上流側の各燃焼帯の空気比を制御することが示されており、各燃焼帯の燃焼排ガス出側に酸素濃度計及びＣＯ濃度計を設け、一部の燃焼帯のバーナーが消火又は低負荷状態で操業しているときに、当該燃焼帯での少なくとも酸素濃度の目標値を求め、当該目標値に基づいて上流側の各燃焼帯の空気比を求め、求めた空気比に応じてＣＯ濃度目標値及び酸素濃度目標値の何れかを設定し、設定された目標値と前記酸素濃度計及びＣＯ濃度計の計測値とに基づいて酸素濃度及びＣＯ濃度の何れかを制御することが示されている。
Furthermore, in the conventional method of operating a continuous heating furnace equipped with a plurality of combustion zones each having combustion burners, as shown in Patent Document 2, some burners in the combustion zones are extinguished or operated in a low load state. It has been shown that at least the target value of oxygen concentration in the combustion zone concerned is determined when the combustion zone is in use, and the air ratio of each combustion zone on the upstream side is controlled based on the target value. An oxygen concentration meter and a CO concentration meter are installed on the exhaust gas outlet side, and when burners in some combustion zones are extinguished or operating under low load, at least the target value of oxygen concentration in the combustion zone is determined, and the The air ratio of each combustion zone on the upstream side is determined based on the target value, and either the CO concentration target value or the oxygen concentration target value is set according to the determined air ratio, and the set target value and the oxygen concentration meter are set. It is shown that either the oxygen concentration or the CO concentration is controlled based on the measured value of the oxygen concentration meter and the measured value of the CO concentration meter.
しかし、特許文献２に示されるものにおいては、前記のように各燃焼帯の燃焼排ガス出側に酸素濃度計及びＣＯ濃度計を設け、一部の燃焼帯のバーナーが消火又は低負荷状態で操業しているときに、当該燃焼帯での少なくとも酸素濃度の目標値を求めて、当該目標値に基づいて上流側の各燃焼帯の空気比を求めるため、前記の特許文献１に示される炉の扉を開閉させた場合と同様に、炉内に侵入する侵入空気の量が大幅に変化して、炉内における酸素濃度が大きく変化する場合に、速やかに対応して炉内における空気比を一定化させることは非常に困難であり、例えば、バーナーを複数設けた炉において、一部のバーナーの燃焼を停止し、燃料ノズルの熱変形を防止するための冷却用空気だけが炉内に流れ込むことによって、炉内に侵入する侵入空気の量が大幅に増加した場合において、炉内における空気比を一定化させるように、バーナーに供給する燃焼用空気の割合を減少させて、バーナーにおける空気比を大幅に減少させると、バーナーから未燃ガスが噴出されて、煤や一酸化炭素が発生しやすくなり、操業時における安全性が低下したり、製品や環境に悪影響を及ぼすという問題があった。
However, in the device shown in Patent Document 2, an oxygen concentration meter and a CO concentration meter are provided on the flue gas outlet side of each combustion zone as described above, and burners in some combustion zones are extinguished or operated in a low load state. In order to obtain at least a target value for the oxygen concentration in the combustion zone and determine the air ratio in each combustion zone on the upstream side based on the target value, the furnace shown in Patent Document 1 is used. Similar to opening and closing the door, if the amount of air entering the furnace changes significantly and the oxygen concentration inside the furnace changes greatly, you can quickly respond and keep the air ratio in the furnace constant. For example, in a furnace with multiple burners, it is very difficult to stop combustion in some burners and allow only cooling air to flow into the furnace to prevent thermal deformation of the fuel nozzle. When the amount of air entering the furnace increases significantly, the ratio of combustion air supplied to the burner is reduced to keep the air ratio in the furnace constant. If the amount is significantly reduced, unburned gas will be ejected from the burner, making it easier to generate soot and carbon monoxide, which will reduce safety during operation and have a negative impact on products and the environment.
本発明は、燃料供給管を通して供給される燃料と、空気供給管を通して供給される燃焼用空気との割合を、空気比制御システムにより調整してバーナーに供給し、このバーナーから炉内に燃料と燃焼用空気とを噴出させて、炉内において燃料と燃焼用空気とを適切な空気比にして燃焼させるようにした燃焼設備における前記のような問題を解決することを課題とするものである。
The present invention adjusts the ratio of fuel supplied through a fuel supply pipe and combustion air supplied through an air supply pipe to a burner, and supplies the burner with fuel into the furnace. The object of the present invention is to solve the above-mentioned problems in a combustion equipment that blows out combustion air and burns the fuel and combustion air at an appropriate air ratio in a furnace.
すなわち、本発明は、前記のような燃焼設備において、炉の扉を開閉させる場合のように、炉内に侵入する侵入空気の量が大幅に変化して、炉内における酸素濃度が大きく変化する場合においても、バーナーに供給する燃料と燃焼用空気との割合を適切に制御して、良好な燃焼状態が安定して得られるようにすることを課題とするものである。
That is, the present invention can be used in combustion equipment as described above, in which the amount of air entering the furnace changes significantly, such as when opening and closing the furnace door, and the oxygen concentration within the furnace changes significantly. Even in such cases, it is an object of the present invention to appropriately control the ratio of the fuel supplied to the burner and the combustion air so that a good combustion state can be stably obtained.
本発明に係る燃焼設備においては、前記のような課題を解決するため、燃料供給管を通して供給される燃料と、空気供給管を通して供給される燃焼用空気との割合を、空気比制御システムにより調整してバーナーに供給し、前記のバーナーから燃料と燃焼用空気とを炉内に噴出させて燃焼させる燃焼設備において、炉内の酸素濃度を検知する酸素濃度センサーを設け、前記の酸素濃度センサーによって検知された炉内の酸素濃度を、出力制御装置により前記の空気比制御システムに出力して、前記の空気比制御システムにより前記のバーナーに供給する燃料と燃焼用空気との割合を調整する一方、前記の炉に設けられた扉を開けることにより、炉内に侵入する侵入空気の量が大きくなって、酸素濃度センサーによって検知される炉内の酸素濃度が大きく増加する場合には、前記の酸素濃度センサーによって検知された炉内の酸素濃度を、前記の出力制御装置により前記の空気比制御システムに出力せずに、前記の空気比制御システムにより、バーナーに供給する燃料と燃焼用空気との割合を維持させる一方、前記の扉が閉じられて、前記の酸素濃度センサーによって検知される炉内の酸素濃度が所定の値に戻った場合に、前記の酸素濃度センサーによって検知された炉内の酸素濃度を、前記の出力制御装置により前記の空気比制御システムに出力して、前記の空気比制御システムにより、前記のバーナーに供給する燃料と燃焼用空気との割合を制御するようにした。
In order to solve the above problems, in the combustion equipment according to the present invention, the ratio of the fuel supplied through the fuel supply pipe and the combustion air supplied through the air supply pipe is adjusted by an air ratio control system. In a combustion equipment that supplies fuel and combustion air to a burner and injects the fuel and combustion air from the burner into the furnace for combustion, an oxygen concentration sensor is provided to detect the oxygen concentration in the furnace, and the oxygen concentration sensor The detected oxygen concentration in the furnace is outputted to the air ratio control system by the output control device, and the air ratio control system adjusts the ratio of fuel and combustion air to be supplied to the burner. , if opening the door installed in the furnace increases the amount of intruding air that enters the furnace, and the oxygen concentration in the furnace detected by the oxygen concentration sensor increases significantly, the above-mentioned The oxygen concentration in the furnace detected by the oxygen concentration sensor is not outputted to the air ratio control system by the output control device, but the air ratio control system controls the fuel and combustion air to be supplied to the burner. When the door is closed and the oxygen concentration in the furnace detected by the oxygen concentration sensor returns to a predetermined value, The output control device outputs the oxygen concentration to the air ratio control system, and the air ratio control system controls the ratio of fuel to combustion air supplied to the burner. .
そして、本発明の燃焼設備においては、前記のように炉内の酸素濃度を酸素濃度センサーによって検知し、前記の酸素濃度センサーによって検知された炉内の酸素濃度を前記の出力装置から前記の空気比制御システムに出力し、空気比制御システムにより、前記のバーナーに供給する燃料と燃焼用空気との量を調整するようにしたため、炉内における酸素濃度が変化しそうな場合等においても、前記の空気比制御システムにより、炉内における酸素濃度が変化しないように、前記のバーナーに供給する燃料と燃焼用空気との割合を調整することにより、炉内における空気比を所定の値にして安定した燃焼を行うことができる。
In the combustion equipment of the present invention, the oxygen concentration in the furnace is detected by the oxygen concentration sensor as described above, and the oxygen concentration in the furnace detected by the oxygen concentration sensor is transmitted from the output device to the oxygen concentration in the furnace. Since the output is output to the ratio control system and the amount of fuel and combustion air supplied to the burner is adjusted by the air ratio control system, even when the oxygen concentration in the furnace is likely to change, the above-mentioned The air ratio control system keeps the air ratio in the furnace at a predetermined value by adjusting the ratio of the fuel supplied to the burner and the combustion air so that the oxygen concentration in the furnace does not change. Combustion can be performed.
一方、前記の炉に設けられた扉を開けることにより、炉内に侵入する侵入空気の量が大きくなって、酸素濃度センサーによって検知される炉内の酸素濃度が大きく増加する場合には、前記の酸素濃度センサーによって検知された炉内の酸素濃度を、前記の出力制御装置により前記の空気比制御システムに出力せずに、前記の空気比制御システムにより、バーナーに供給する燃料と燃焼用空気との割合を維持させるようにしたため、炉に設けられた扉が開かれて、酸素濃度センサーによって検知される炉内の酸素濃度が大きく増加した場合においても、前記の空気比制御システムによって、バーナーに供給する燃料と燃焼用空気との割合が維持されるようになり、前記の空気比制御システムにより、バーナーに供給する燃焼用空気の割合が大きく減少されるということがなく、燃料が完全燃焼されなくなって（つまり、不完全燃焼となり）、炉内から未燃ガスが外部に排出されたり、煤や一酸化炭素が発生したりするのが防止される。
On the other hand, if opening the door installed in the furnace increases the amount of air entering the furnace, and the oxygen concentration in the furnace detected by the oxygen concentration sensor increases significantly, The oxygen concentration in the furnace detected by the oxygen concentration sensor is not outputted to the air ratio control system by the output control device, but the air ratio control system controls the fuel and combustion air to be supplied to the burner. Even if the door installed in the furnace is opened and the oxygen concentration inside the furnace detected by the oxygen concentration sensor increases significantly, the air ratio control system The air ratio control system ensures that the proportion of combustion air supplied to the burner is not significantly reduced and that the fuel is completely combusted. (in other words, incomplete combustion), preventing unburned gas from being discharged from the furnace to the outside, and preventing soot and carbon monoxide from being generated.
また、前記の扉が閉じられて、前記の酸素濃度センサーによって検知される炉内の酸素濃度が所定の値に戻った場合に、前記の酸素濃度センサーによって検知された炉内の酸素濃度を、前記の出力制御装置により前記の空気比制御システムに出力して、前記の空気比制御システムにより、前記のバーナーに供給する燃料と燃焼用空気との割合を元通りに制御させるようにしたため、炉おける空気比を元通りの所定の値にして安定した燃焼を行うことができる。
Further, when the door is closed and the oxygen concentration in the furnace detected by the oxygen concentration sensor returns to a predetermined value, the oxygen concentration in the furnace detected by the oxygen concentration sensor is The output control device outputs an output to the air ratio control system, which causes the air ratio control system to restore the ratio of fuel to combustion air supplied to the burner, so that the furnace Stable combustion can be achieved by returning the air ratio to the original predetermined value.
本発明における燃焼設備においては、前記のように炉内の酸素濃度を酸素濃度センサーによって検知し、前記の酸素濃度センサーによって検知された炉内の酸素濃度を前記の出力装置から前記の空気比制御システムに出力して、空気比制御システムにより、前記のバーナーに供給する燃料と燃焼用空気との量を調整するようにしたため、炉内における酸素濃度が変化した場合等においても、前記の空気比制御システムにより、前記のバーナーに供給する燃料と燃焼用空気との割合を調整することによって、炉内における空気比を所定の値にして安定した燃焼を行うことができる。一方、前記の炉に設けられた扉を開けることにより、炉内に侵入する侵入空気の量が大きくなって、酸素濃度センサーによって検知される炉内の酸素濃度が大きく増加する場合には、前記の酸素濃度センサーによって検知された炉内の酸素濃度を、前記の出力制御装置により前記の空気比制御システムに出力せずに、前記の空気比制御システムにより、バーナーに供給する燃料と燃焼用空気との割合を維持させる一方、前記の扉が閉じられて、前記の酸素濃度センサーによって検知される炉内の酸素濃度が所定の値に戻った場合に、前記の酸素濃度センサーによって検知された炉内の酸素濃度を、前記の出力制御装置により前記の空気比制御システムに出力して、前記の空気比制御システムにより、前記のバーナーに供給する燃料と燃焼用空気との割合を制御するようにしたため、炉に設けられた扉が開けられて、酸素濃度センサーによって検知される炉内の酸素濃度が大きく増加した場合に、バーナーに供給される燃焼用空気の割合が大きく減少されて、燃料が完全燃焼されなくなるということがなく、炉内から未燃ガスが外部に排出されたり、煤や一酸化炭素が発生したりするのが防止されると共に、前記の酸素濃度センサーによって検知される炉内の酸素濃度が所定の値に戻った場合には、前記の空気比制御システムにより、前記のバーナーに供給する燃料と燃焼用空気との割合を元通りに制御させるようにしたため、炉内における空気比を元通りの所定の値にして安定した燃焼を行うことができる。
In the combustion equipment according to the present invention, the oxygen concentration in the furnace is detected by the oxygen concentration sensor as described above, and the oxygen concentration in the furnace detected by the oxygen concentration sensor is transmitted from the output device to the air ratio control. The air ratio control system adjusts the amount of fuel and combustion air supplied to the burner, so even if the oxygen concentration in the furnace changes, the air ratio By adjusting the ratio of fuel and combustion air supplied to the burner using a control system, stable combustion can be achieved by setting the air ratio in the furnace to a predetermined value. On the other hand, if opening the door installed in the furnace increases the amount of air entering the furnace, and the oxygen concentration in the furnace detected by the oxygen concentration sensor increases significantly, The oxygen concentration in the furnace detected by the oxygen concentration sensor of When the door is closed and the oxygen concentration in the furnace detected by the oxygen concentration sensor returns to a predetermined value, The output control device outputs the oxygen concentration in the air to the air ratio control system, and the air ratio control system controls the ratio of the fuel to the combustion air to be supplied to the burner. Therefore, when the door installed in the furnace is opened and the oxygen concentration inside the furnace detected by the oxygen concentration sensor increases significantly, the proportion of combustion air supplied to the burner is greatly reduced and the fuel is This prevents complete combustion from occurring, prevents unburned gas from being discharged from the furnace to the outside, and prevents soot and carbon monoxide from being generated. When the oxygen concentration of Stable combustion can be achieved by returning the ratio to its original predetermined value.
この結果、本発明における燃焼設備においては、炉の扉を開閉させる場合のように、炉内に侵入する侵入空気の量が大幅に変化して、炉内における酸素濃度が大きく変化する場合においても、バーナーに供給する燃料と燃焼用空気との割合を適切に制御して、良好な燃焼状態が安定して得られるようになる。
As a result, in the combustion equipment of the present invention, even when the amount of air entering the furnace changes significantly, such as when opening and closing the furnace door, the oxygen concentration inside the furnace changes greatly. By appropriately controlling the ratio of fuel supplied to the burner and combustion air, a good combustion state can be stably obtained.
以下、本発明の実施形態に係る燃焼設備を添付図面に基づいて具体的に説明する。なお、本発明に係る燃焼設備は、下記の実施形態に示したものに限定されず、発明の要旨を変更しない範囲において、適宜変更して実施できるものである。
Hereinafter, a combustion facility according to an embodiment of the present invention will be specifically described based on the accompanying drawings. Note that the combustion equipment according to the present invention is not limited to that shown in the embodiments below, and can be implemented with appropriate modifications within the scope of the gist of the invention.
この実施形態における燃焼設備においては、図１に示すように、開口部１１の開閉を行なう扉１２が設けられた炉１０にバーナー２０を設け、前記のバーナー２０に、燃料供給管３０を通して燃料である都市ガス等の燃料ガスＧを供給すると共に、空気供給管４０を通して燃焼用空気Ａｉｒを供給し、このバーナー２０から燃焼用空気Ａｉｒと燃料ガスＧとを炉１０内に噴出させて燃焼させるようにしている。
In the combustion equipment according to this embodiment, as shown in FIG. In addition to supplying a fuel gas G such as a certain city gas, combustion air Air is supplied through an air supply pipe 40, and the combustion air Air and fuel gas G are ejected from the burner 20 into the furnace 10 for combustion. I have to.
そして、この実施形態における燃焼設備においては、前記のようにバーナー２０に、燃料供給管３０を通して燃料ガスＧを供給すると共に、空気供給管４０を通して燃焼用空気Ａｉｒを供給するにあたり、前記の燃料供給管３０に設けた流量調整弁３１と空気供給管４０に設けた流量調整弁４１とを空気比制御システム５０により調整して、バーナー２０に供給する燃料ガスＧと燃焼用空気Ａｉｒとの割合を制御し、バーナー２０における空気比を所定の値に調整して、バーナー２０から燃料ガスＧと燃焼用空気Ａｉｒとを炉１０内に噴出させて燃焼させるようにしている。
In the combustion equipment of this embodiment, the fuel gas G is supplied to the burner 20 through the fuel supply pipe 30 as described above, and the combustion air Air is supplied through the air supply pipe 40. The air ratio control system 50 adjusts the flow rate adjustment valve 31 provided in the pipe 30 and the flow rate adjustment valve 41 provided in the air supply pipe 40 to adjust the ratio of the fuel gas G and combustion air Air supplied to the burner 20. The air ratio in the burner 20 is adjusted to a predetermined value, and the fuel gas G and combustion air Air are ejected from the burner 20 into the furnace 10 for combustion.
また、この実施形態における燃焼設備においては、炉１０内の酸素濃度を検知する酸素濃度センサー５１を設け、この酸素濃度センサー５１によって検知された炉１０内の酸素濃度を、出力制御装置５２により前記の空気比制御システム５０に出力させるようにし、出力された炉１０内の酸素濃度に基づいて、前記の空気比制御システム５０により、燃料供給管３０に設けた流量調整弁３１と空気供給管４０に設けた流量調整弁４１とを調整して、バーナー２０に供給する燃料ガスＧと燃焼用空気Ａｉｒとの割合を制御し、バーナー２０における空気比を所定の値に調整するようにしている。なお、図１においては、出力制御装置５２を空気比制御システム５０に接続させている状態を示している。
In addition, the combustion equipment in this embodiment is provided with an oxygen concentration sensor 51 that detects the oxygen concentration in the furnace 10, and the oxygen concentration in the furnace 10 detected by the oxygen concentration sensor 51 is controlled by the output control device 52. Based on the output oxygen concentration in the furnace 10, the air ratio control system 50 controls the flow rate regulating valve 31 provided in the fuel supply pipe 30 and the air supply pipe 40. The ratio of the fuel gas G and combustion air Air supplied to the burner 20 is controlled by adjusting the flow rate regulating valve 41 provided in the burner 20, and the air ratio in the burner 20 is adjusted to a predetermined value. Note that FIG. 1 shows a state in which the output control device 52 is connected to the air ratio control system 50.
そして、この実施形態における燃焼設備において、図２（Ａ）に示すように、炉１０の扉１２が開かれると、炉１０の開口部１１を通して炉１０外の外部空気Ａｉｒ’が大量に炉１０内に流れ込んで、前記の酸素濃度センサー５１によって検知される炉１０内の酸素濃度が大幅に増加することになる。
In the combustion equipment of this embodiment, as shown in FIG. As a result, the oxygen concentration within the furnace 10 detected by the oxygen concentration sensor 51 increases significantly.
ここで、このように炉１０内の酸素濃度が大幅に増加した場合には、前記のように炉１０内の酸素濃度を出力制御装置５２により空気比制御システム５０に出力し、バーナー２０に供給する燃料ガスＧと燃焼用空気Ａｉｒとの割合を空気比制御システム５０により制御して、炉１０内における空気比が所定の値になるようにバーナー２０に供給する燃焼用空気Ａｉｒの量を大幅に減少させる結果となり、バーナー２０に供給された燃料ガスＧが完全燃焼されなくなって、炉１０内に未燃ガスが残って外部に排出されたり、煤や一酸化炭素が発生したりするという問題が生じる。
Here, when the oxygen concentration in the furnace 10 increases significantly as described above, the output control device 52 outputs the oxygen concentration in the furnace 10 to the air ratio control system 50 and supplies it to the burner 20. The ratio of the fuel gas G to the combustion air Air is controlled by the air ratio control system 50, and the amount of combustion air Air supplied to the burner 20 is greatly increased so that the air ratio in the furnace 10 becomes a predetermined value. As a result, the fuel gas G supplied to the burner 20 is not completely combusted, resulting in unburned gas remaining in the furnace 10 and being discharged to the outside, or generating soot and carbon monoxide. occurs.
このため、この実施形態における燃焼設備において、炉１０の扉１２が開かれて、炉１０の開口部１１を通して炉１０外の外部空気Ａｉｒ’が大量に炉１０内に流れ込み、酸素濃度センサー５１によって検知される炉１０内の酸素濃度が大幅に増加する場合には、図２（Ａ）及び図３に示すように、前記の出力制御装置５２をＯＦＦにして、酸素濃度センサー５１によって検知された炉１０内の酸素濃度を、空気比制御システム５０に出力させないようにし、バーナー２０に供給する燃料ガスＧと燃焼用空気Ａｉｒとの割合を空気比制御システム５０によって変更させないようにし、バーナー２０における空気比を一定に固定するようにしている。このようにすると、炉１０内の酸素濃度が大幅に増加した場合に、前記のようにバーナー２０に供給する燃焼用空気Ａｉｒの量が大幅に減少されるということがなく、バーナー２０に供給された燃料ガスＧが完全燃焼されなくなるのが防止される。なお、図２（Ａ）及び後述する図２（Ｂ）においては、出力制御装置５２と空気比制御システム５０とが切断状態にあることを示している。
Therefore, in the combustion equipment of this embodiment, the door 12 of the furnace 10 is opened, and a large amount of external air Air' outside the furnace 10 flows into the furnace 10 through the opening 11 of the furnace 10, and the oxygen concentration sensor 51 detects the If the detected oxygen concentration in the furnace 10 increases significantly, the output control device 52 is turned off and the oxygen concentration detected by the oxygen concentration sensor 51 increases, as shown in FIGS. 2(A) and 3. The oxygen concentration in the furnace 10 is not outputted to the air ratio control system 50, and the ratio of the fuel gas G and combustion air Air supplied to the burner 20 is not changed by the air ratio control system 50. The air ratio is kept constant. In this way, when the oxygen concentration in the furnace 10 increases significantly, the amount of combustion air Air supplied to the burner 20 will not be significantly reduced as described above, and the amount of combustion air supplied to the burner 20 will be reduced. This prevents the fuel gas G from being completely combusted. Note that FIG. 2(A) and FIG. 2(B), which will be described later, show that the output control device 52 and the air ratio control system 50 are in a disconnected state.
また、図２（Ｂ）及び図３に示すように、前記のように開かれた炉１０の扉１２が閉じられて、炉１０外の外部空気Ａｉｒ’が炉１０内に流れ込むのが停止された状態であっても、前記の酸素濃度センサー５１によって検知された炉１０内の酸素濃度が高い状態にある場合には、前記の出力制御装置５２をＯＦＦにした状態で維持させ、酸素濃度センサー５１によって検知された炉１０内の酸素濃度を、空気比制御システム５０に出力させないようにする。なお、このとき、酸素濃度センサー５１は炉１０内の酸素濃度の監視を続けている。
Further, as shown in FIGS. 2(B) and 3, the door 12 of the furnace 10 that has been opened as described above is closed, and the external air Air' outside the furnace 10 is stopped from flowing into the furnace 10. Even if the oxygen concentration in the furnace 10 is high, as detected by the oxygen concentration sensor 51, the output control device 52 is kept in the OFF state, and the oxygen concentration sensor The oxygen concentration in the furnace 10 detected by the air ratio control system 51 is not outputted to the air ratio control system 50. Note that at this time, the oxygen concentration sensor 51 continues to monitor the oxygen concentration within the furnace 10.
そして、前記のように炉１０の扉１２が閉じられて、酸素濃度センサー５１によって検知される炉１０内の酸素濃度が所定の値に戻った場合には、図１及び図３に示すように、前記の出力制御装置５２をＯＮにして、前記の酸素濃度センサー５１によって検知された炉１０内の酸素濃度を、出力制御装置５２により前記の空気比制御システム５０に出力し、空気比の固定を解除して、この空気比制御システム５０により、燃料供給管３０に設けた流量調整弁３１と空気供給管４０に設けた流量調整弁４１とを調整して、バーナー２０に供給する燃料ガスＧと燃焼用空気Ａｉｒとの割合を制御し、バーナー２０における空気比を所定の値に調整させるようにする。
When the door 12 of the furnace 10 is closed as described above and the oxygen concentration inside the furnace 10 detected by the oxygen concentration sensor 51 returns to a predetermined value, as shown in FIGS. 1 and 3, , the output control device 52 is turned on, and the oxygen concentration in the furnace 10 detected by the oxygen concentration sensor 51 is outputted to the air ratio control system 50 by the output control device 52 to fix the air ratio. is released, and the air ratio control system 50 adjusts the flow rate adjustment valve 31 provided in the fuel supply pipe 30 and the flow rate adjustment valve 41 provided in the air supply pipe 40 to control the fuel gas G supplied to the burner 20. The ratio between the combustion air and the combustion air Air is controlled so that the air ratio in the burner 20 is adjusted to a predetermined value.
ここで、この実施形態における燃焼設備においては、前記の出力制御装置５２をＯＦＦにするタイミングが、図３に示すように、炉１０の扉１２を開けるタイミングと同時になるようにしたが、出力制御装置５２をＯＦＦにするタイミングを、炉１０の扉１２を開く直前や、炉１０の扉１２を開いた直後にすることも可能である。
Here, in the combustion equipment of this embodiment, the timing for turning off the output control device 52 is set to coincide with the timing for opening the door 12 of the furnace 10, as shown in FIG. It is also possible to turn off the device 52 immediately before opening the door 12 of the furnace 10 or immediately after opening the door 12 of the furnace 10.
また、この実施形態における燃焼設備においては、酸素濃度センサー５１によって検知される酸素濃度が大きく変化する場合として、炉１０に設けられた扉１２を開閉させる場合を示したが、酸素濃度センサー５１によって検知される酸素濃度が大きく変化する場合はこれに限定されない。
Furthermore, in the combustion equipment of this embodiment, the case where the door 12 provided in the furnace 10 is opened and closed is shown as a case in which the oxygen concentration detected by the oxygen concentration sensor 51 changes significantly. The case where the detected oxygen concentration changes significantly is not limited to this.
例えば、図示していないが、バーナーの燃料ノズルの外周に熱変形防止用の冷却空気供給管が設けられたバーナーを炉に複数設け、各バーナーにより燃焼を行うようになった燃焼設備において、各バーナーにおいて燃焼を行っている状態から、１本以上のバーナーにおける燃焼が停止されて、停止された各バーナーにおける燃料ノズルの外周における冷却空気供給管を通して大量の冷却用空気が炉内に供給されて、酸素濃度センサーによって検知される酸素濃度が大きく増加するような場合においても、前記の実施形態の場合と同様にして制御することができる。
For example, although not shown in the figure, in a combustion equipment where a furnace is equipped with multiple burners each having a cooling air supply pipe installed around the outer periphery of the burner fuel nozzle to prevent thermal deformation, each burner performs combustion. From the state in which combustion is occurring in the burners, combustion in one or more burners is stopped, and a large amount of cooling air is supplied into the furnace through the cooling air supply pipe around the outer periphery of the fuel nozzle of each burner that has been stopped. Even in a case where the oxygen concentration detected by the oxygen concentration sensor increases significantly, control can be performed in the same manner as in the above embodiment.
１０ ：炉
１１ ：開口部
１２ ：扉
２０ ：バーナー
３０ ：燃料供給管
３１ ：流量調整弁
４０ ：空気供給管
４１ ：流量調整弁
５０ ：空気比制御システム
５１ ：酸素濃度センサー
５２ ：出力制御装置
Ａｉｒ ：燃焼用空気
Ａｉｒ’ ：外部空気
Ｇ ：燃料ガス 10: Furnace 11: Opening 12: Door 20: Burner 30: Fuel supply pipe 31: Flow rate adjustment valve 40: Air supply pipe 41: Flow rate adjustment valve 50: Air ratio control system 51: Oxygen concentration sensor 52: Output control device Air : Combustion air Air' : External air G : Fuel gas
１１ ：開口部
１２ ：扉
２０ ：バーナー
３０ ：燃料供給管
３１ ：流量調整弁
４０ ：空気供給管
４１ ：流量調整弁
５０ ：空気比制御システム
５１ ：酸素濃度センサー
５２ ：出力制御装置
Ａｉｒ ：燃焼用空気
Ａｉｒ’ ：外部空気
Ｇ ：燃料ガス 10: Furnace 11: Opening 12: Door 20: Burner 30: Fuel supply pipe 31: Flow rate adjustment valve 40: Air supply pipe 41: Flow rate adjustment valve 50: Air ratio control system 51: Oxygen concentration sensor 52: Output control device Air : Combustion air Air' : External air G : Fuel gas
Claims (2)
- 燃料供給管を通して供給される燃料と、空気供給管を通して供給される燃焼用空気との割合を、空気比制御システムにより調整してバーナーに供給し、前記のバーナーから燃料と燃焼用空気とを炉内に噴出させて燃焼させる燃焼設備において、炉内の酸素濃度を検知する酸素濃度センサーを設け、前記の酸素濃度センサーによって検知された炉内の酸素濃度を、出力制御装置により前記の空気比制御システムに出力して、前記の空気比制御システムにより前記のバーナーに供給する燃料と燃焼用空気との割合を調整する一方、前記の炉に設けられた扉を開けることにより、炉内に侵入する侵入空気の量が大きくなって、酸素濃度センサーによって検知される炉内の酸素濃度が大きく増加する場合には、前記の酸素濃度センサーによって検知された炉内の酸素濃度を、前記の出力制御装置により前記の空気比制御システムに出力せずに、前記の空気比制御システムにより、バーナーに供給する燃料と燃焼用空気との合を維持させる一方、前記の扉が閉じられて、前記の酸素濃度センサーによって検知される炉内の酸素濃度が所定の値に戻った場合に、前記の酸素濃度センサーによって検知された炉内の酸素濃度を、前記の出力制御装置により前記の空気比制御システムに出力して、前記の空気比制御システムにより、前記のバーナーに供給する燃料と燃焼用空気との割合を制御することを特徴とする燃焼設備。 The proportion of fuel supplied through the fuel supply pipe and combustion air supplied through the air supply pipe is adjusted by an air ratio control system and supplied to the burner, and the fuel and combustion air are supplied from the burner to the furnace. In combustion equipment that injects air into the furnace for combustion, an oxygen concentration sensor is provided to detect the oxygen concentration in the furnace, and the oxygen concentration in the furnace detected by the oxygen concentration sensor is controlled by the output control device to control the air ratio. output to the system and adjust the ratio of fuel and combustion air supplied to the burner by the air ratio control system, while entering the furnace by opening the door provided in the furnace. When the amount of intruding air increases and the oxygen concentration in the furnace detected by the oxygen concentration sensor increases significantly, the oxygen concentration in the furnace detected by the oxygen concentration sensor is controlled by the output control device. The air ratio control system maintains the combination of fuel supplied to the burner and combustion air without outputting to the air ratio control system, while the door is closed and the oxygen concentration is maintained. When the oxygen concentration in the furnace detected by the sensor returns to a predetermined value, the oxygen concentration in the furnace detected by the oxygen concentration sensor is outputted to the air ratio control system by the output control device. A combustion facility characterized in that the air ratio control system controls the ratio of fuel and combustion air supplied to the burner.
- 請求項１に記載の燃焼設備において、前記の酸素濃度センサーによって検知された炉内の酸素濃度を前記の出力制御装置により前記の空気比制御システムに出力させないようにするタイミングを、前記の扉を開く直前にしたことを特徴とする燃焼設備。 The combustion equipment according to claim 1, wherein the timing at which the output control device prevents the output control device from outputting the oxygen concentration in the furnace detected by the oxygen concentration sensor to the air ratio control system is controlled by opening the door. Combustion equipment characterized by what it did just before opening.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022-135532 | 2022-08-29 | ||
| JP2022135532A JP7210125B2 (en) | 2022-08-29 | 2022-08-29 | Combustion equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024048006A1 true WO2024048006A1 (en) | 2024-03-07 |
Family
ID=84237619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2023/021916 WO2024048006A1 (en) | 2022-08-29 | 2023-06-13 | Combustion equipment |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7210125B2 (en) |
| WO (1) | WO2024048006A1 (en) |
Citations (4)
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|---|---|---|---|---|
| JPS573848B2 (en) * | 1977-02-17 | 1982-01-23 | ||
| JPS6051607B2 (en) * | 1979-12-05 | 1985-11-14 | 日本鋼管株式会社 | Combustion control device in heating furnace |
| JPH07103461A (en) * | 1993-10-12 | 1995-04-18 | Nkk Corp | Air ratio regulating method for furnace employing heat accumulation type burner |
| JP2000274670A (en) * | 1999-03-23 | 2000-10-03 | Ngk Insulators Ltd | Batch type combustion furnace and burner combustion control method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5843658B2 (en) * | 1978-08-30 | 1983-09-28 | 川崎製鉄株式会社 | Combustion control method for combustion equipment where outside air can enter |
| JP5310817B2 (en) | 2011-10-03 | 2013-10-09 | 株式会社Ｉｈｉ | Heating furnace atmosphere control method |
| JP6773066B2 (en) | 2018-03-14 | 2020-10-21 | Ｊｆｅスチール株式会社 | Abnormality judgment method and abnormality judgment device of oxygen concentration meter installed in the continuous heating furnace |
| JP2019168209A (en) | 2018-03-26 | 2019-10-03 | 東邦瓦斯株式会社 | Combustion monitoring device and combustion control system |
| JP2020060330A (en) | 2018-10-11 | 2020-04-16 | 京都Ｅｉｃ株式会社 | Air ratio controller, control program, and control method |
| JP7214940B2 (en) | 2019-02-28 | 2023-01-31 | 株式会社神戸製鋼所 | Heating furnace air volume control method |
-
2022
- 2022-08-29 JP JP2022135532A patent/JP7210125B2/en active Active
-
2023
- 2023-06-13 WO PCT/JP2023/021916 patent/WO2024048006A1/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS573848B2 (en) * | 1977-02-17 | 1982-01-23 | ||
| JPS6051607B2 (en) * | 1979-12-05 | 1985-11-14 | 日本鋼管株式会社 | Combustion control device in heating furnace |
| JPH07103461A (en) * | 1993-10-12 | 1995-04-18 | Nkk Corp | Air ratio regulating method for furnace employing heat accumulation type burner |
| JP2000274670A (en) * | 1999-03-23 | 2000-10-03 | Ngk Insulators Ltd | Batch type combustion furnace and burner combustion control method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7210125B2 (en) | 2023-01-23 |
| JP2022177842A (en) | 2022-12-01 |
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