WO2024122143A1 - Dispositif de combustion - Google Patents

Dispositif de combustion Download PDF

Info

Publication number
WO2024122143A1
WO2024122143A1 PCT/JP2023/032976 JP2023032976W WO2024122143A1 WO 2024122143 A1 WO2024122143 A1 WO 2024122143A1 JP 2023032976 W JP2023032976 W JP 2023032976W WO 2024122143 A1 WO2024122143 A1 WO 2024122143A1
Authority
WO
WIPO (PCT)
Prior art keywords
ammonia
nozzle
injection port
furnace
injected
Prior art date
Application number
PCT/JP2023/032976
Other languages
English (en)
Japanese (ja)
Inventor
大樹 石井
泰林 金海
亮 花岡
Original Assignee
株式会社Ihi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社Ihi filed Critical 株式会社Ihi
Publication of WO2024122143A1 publication Critical patent/WO2024122143A1/fr

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C99/00—Subject-matter not provided for in other groups of this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • F23D14/24—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other at least one of the fluids being submitted to a swirling motion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J7/00—Arrangement of devices for supplying chemicals to fire
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply

Definitions

  • Patent Document 1 discloses a burner that mixes pulverized coal and ammonia as fuel.
  • the purpose of this disclosure is to provide a combustion device that can suppress the generation of NOx.
  • the combustion device of the present disclosure includes at least one first ammonia nozzle having a first nozzle facing the inside of the furnace, a plurality of second ammonia nozzles having a second nozzle facing the inside of the furnace and arranged at intervals in a circumferential direction surrounding the at least one first ammonia nozzle, an air flow path communicating with the inside of the furnace, arranged around the plurality of second ammonia nozzles and provided with a swirler, and a control device that controls the flow rate of ammonia injected from the first nozzle and the flow rate of ammonia injected from the second nozzle so that the flow rate of ammonia injected from the second nozzle is faster than the flow rate of ammonia injected from the first nozzle.
  • the at least one first ammonia nozzle may include a plurality of first ammonia nozzles arranged at intervals in the circumferential direction, and the first nozzle of each of the plurality of first ammonia nozzles may face the center in the circumferential direction when viewed from inside the furnace.
  • the second nozzle faces in a direction inclined with respect to the central axis direction of the second ammonia nozzle, and the second ammonia nozzle may be arranged to be rotatable about its central axis.
  • FIG. 1 is a schematic diagram illustrating a boiler according to an embodiment of the present disclosure.
  • FIG. 2 is a schematic diagram illustrating a combustion device according to an embodiment of the present disclosure.
  • FIG. 3 is a front view of a burner according to an embodiment of the present disclosure.
  • FIG. 4 is a diagram for explaining a combustion state in the combustion device according to the embodiment of the present disclosure.
  • FIG. 5 is a diagram for explaining a combustion state according to a comparative example.
  • FIG. 6 is a schematic diagram showing a combustion device according to a first modified example.
  • FIG. 7 is a front view showing a burner according to a first modified example.
  • FIG. 8 is a schematic diagram showing a combustion device according to a second modified example.
  • FIG. 1 is a schematic diagram showing a boiler 1 according to this embodiment. As shown in FIG. 1, the boiler 1 includes a furnace 2, a flue 3, and a burner 4.
  • the furnace 2 burns fuel to generate combustion heat.
  • the furnace 2 has a cylindrical shape, such as a rectangular cylinder shape, extending vertically.
  • high-temperature combustion gas is generated by burning the fuel.
  • An exhaust port 2a is provided at the bottom of the furnace 2 to discharge ash generated by the combustion of the fuel to the outside.
  • the flue 3 is a passage that guides the combustion gas generated in the furnace 2 to the outside as exhaust gas.
  • the flue 3 is connected to the top of the furnace 2.
  • the flue 3 has a horizontal flue 3a and a rear flue 3b.
  • the horizontal flue 3a extends horizontally from the top of the furnace 2.
  • the rear flue 3b extends downward from the end of the horizontal flue 3a.
  • the boiler 1 is equipped with a superheater (not shown) that is installed on the top of the furnace 2. In the superheater, heat is exchanged between the combustion heat generated in the furnace 2 and water, thereby generating steam.
  • the boiler 1 may also be equipped with various devices such as a reheater, a coal economizer, or an air preheater that are not shown in FIG. 1.
  • the burners 4 are provided on the wall at the bottom of the furnace 2.
  • a plurality of burners 4 are provided in the furnace 2 at intervals in the circumferential direction of the furnace 2.
  • the burners 4 are also provided at intervals in the vertical direction, which is the extension direction of the furnace 2.
  • the burners 4 inject ammonia as fuel into the internal space 2b of the furnace 2.
  • the ammonia injected from the burners 4 burns, forming a flame F in the internal space 2b of the furnace 2.
  • the furnace 2 is provided with an ignition device (not shown) that ignites the ammonia injected from the burners 4.
  • FIG. 2 is a schematic diagram showing the combustion device 10 according to this embodiment.
  • the combustion device 10 includes a burner 4, an ammonia tank 5, a first flow control valve 6, a second flow control valve 7, and a control device 8.
  • FIG. 3 is a front view showing the burner 4 according to this embodiment. Specifically, FIG. 3 is a view of the burner 4 from inside the furnace 2.
  • the burner 4 is attached to the wall of the furnace 2 outside the furnace 2.
  • the burner 4 has a first ammonia nozzle 41, a plurality of second ammonia nozzles 42, a nozzle case 43, a housing 44, an air flow path 45, and a swirler 46.
  • the first ammonia nozzle 41 and the multiple second ammonia nozzles 42 are nozzles that spray ammonia.
  • the first ammonia nozzle 41 and the multiple second ammonia nozzles 42 have a substantially cylindrical shape.
  • the first ammonia nozzle 41 and the multiple second ammonia nozzles 42 are housed in the nozzle case 43 while being held in the nozzle case 43.
  • the nozzle case 43 has a substantially cylindrical shape.
  • the first ammonia nozzle 41, the multiple second ammonia nozzles 42, and the nozzle case 43 extend in the same direction. Specifically, the first ammonia nozzle 41, the multiple second ammonia nozzles 42, and the nozzle case 43 extend in a direction that intersects with the wall of the furnace 2 (specifically, in a direction that is substantially perpendicular).
  • the first ammonia nozzle 41 extends on the central axis of the nozzle case 43.
  • the multiple second ammonia nozzles 42 are arranged around the first ammonia nozzle 41.
  • the multiple second ammonia nozzles 42 are arranged at intervals in the circumferential direction surrounding the first ammonia nozzle 41.
  • the number of second ammonia nozzles 42 is eight.
  • the number of second ammonia nozzles 42 may be other than eight.
  • the multiple second ammonia nozzles 42 are arranged at equal intervals in the circumferential direction of the nozzle case 43.
  • the multiple second ammonia nozzles 42 may be arranged at unequal intervals in the circumferential direction of the nozzle case 43.
  • the circumferential direction surrounding the first ammonia nozzle 41 coincides with the circumferential direction of the nozzle case 43.
  • this direction is also referred to as the circumferential direction of the burner 4.
  • the extension direction of the central axis of the circumferential direction surrounding the first ammonia nozzle 41 coincides with the central axial direction of the nozzle case 43.
  • this direction is also referred to as the central axial direction of the burner 4.
  • the radial direction relative to the circumferential direction surrounding the first ammonia nozzle 41 coincides with the radial direction of the nozzle case 43.
  • this direction is also referred to as the radial direction of the burner 4.
  • a first injection port 41a is provided at the tip of the first ammonia nozzle 41 (the end on the right side in FIG. 2).
  • the first injection port 41a faces the internal space 2b of the furnace 2.
  • the ammonia supplied to the first ammonia nozzle 41 is injected from the first injection port 41a into the internal space 2b of the furnace 2.
  • the first injection port 41a faces the central axis direction of the first ammonia nozzle 41.
  • the flow of ammonia injected from the first injection port 41a is shown diagrammatically by the arrow A1 in FIG. 2.
  • the injection direction of ammonia from the first injection port 41a is the central axis direction of the burner 4.
  • a second injection port 42a is provided at the tip of each second ammonia nozzle 42 (the end on the right side in FIG. 2).
  • the second injection port 42a faces the internal space 2b of the furnace 2.
  • the ammonia supplied to each second ammonia nozzle 42 is injected from the second injection port 42a into the internal space 2b of the furnace 2.
  • the second injection port 42a faces in a direction inclined with respect to the central axis direction of the second ammonia nozzle 42.
  • the flow of ammonia injected from the second injection port 42a is shown diagrammatically by the arrow A2 in FIG. 2 and FIG. 3.
  • the injection direction of ammonia from the second injection port 42a is the circumferential direction of the burner 4 when viewed from the internal space 2b of the furnace 2.
  • the second injection port 42a faces in a direction inclined with respect to the central axis direction of the burner 4 in the circumferential direction of the burner 4.
  • the second nozzle 42a faces the tangential direction of the nozzle case 43 when viewed in the central axial direction of the burner 4. Therefore, the ammonia injected from the second nozzle 42a flows radially outward of the burner 4 in parallel to the tangential direction of the nozzle case 43 as shown by arrow A2 when viewed in the central axial direction of the burner 4. As shown by arrow A2 in Figure 2, the ammonia injected from the second nozzle 42a flows radially outward beyond the nozzle case 43 as it moves away from the second nozzle 42a.
  • An accurate illustration of the inclination of the second nozzle 42a is omitted in Figure 2.
  • the first ammonia nozzle 41 and each of the second ammonia nozzles 42 are connected to the ammonia tank 5 via a flow path.
  • the flow path connected to the ammonia tank 5 branches and is connected to the first ammonia nozzle 41 and each of the second ammonia nozzles 42, respectively.
  • Ammonia is stored in the ammonia tank 5.
  • ammonia is stored in a liquid state in the ammonia tank 5.
  • the ammonia stored in the ammonia tank 5 is vaporized by a vaporizer (not shown). The vaporized ammonia is supplied to the first ammonia nozzle 41 and each of the second ammonia nozzles 42 through the flow path.
  • the first flow control valve 6 is provided in a portion of the flow path connected to the ammonia tank 5 that is connected to the first ammonia nozzle 41.
  • the first flow control valve 6 adjusts the flow rate of ammonia supplied from the ammonia tank 5 to the first ammonia nozzle 41.
  • the opening degree of the first flow control valve 6 the flow rate of ammonia supplied from the ammonia tank 5 to the first ammonia nozzle 41 is adjusted. This adjusts the flow rate of ammonia sprayed from the first nozzle 41a of the first ammonia nozzle 41.
  • the second flow control valve 7 is provided in a portion of the flow path connected to the ammonia tank 5 that is connected to the multiple second ammonia nozzles 42.
  • the second flow control valve 7 adjusts the flow rate of ammonia supplied from the ammonia tank 5 to each second ammonia nozzle 42.
  • the flow rate of ammonia supplied from the ammonia tank 5 to each second ammonia nozzle 42 is adjusted by adjusting the opening degree of the second flow control valve 7. This adjusts the flow rate of ammonia sprayed from the second injection port 42a of the second ammonia nozzle 42.
  • the second flow control valve 7 may be provided for each second ammonia nozzle 42.
  • the housing 44 covers the tip of the outer peripheral surface of the nozzle case 43 (the end on the right side in FIG. 2) and is connected to the wall of the furnace 2.
  • the housing 44 has a roughly truncated cone shape and is arranged coaxially with the nozzle case 43.
  • An air flow path 45 is defined by the inner surface of the housing 44 and the outer peripheral surface of the nozzle case 43.
  • the air flow path 45 is arranged so as to cover the space between the tip of the nozzle case 43 (the end on the right side in FIG. 2) and the furnace 2. In other words, the air flow path 45 is arranged around the multiple second ammonia nozzles 42. Air is supplied to the air flow path 45.
  • An air injection port 45a is formed at the tip of the air flow path 45 (the end on the right side in FIG. 2).
  • the air injection port 45a faces the internal space 2b of the furnace 2.
  • the air injection port 45a has a circular ring shape.
  • the flow of air through the air flow path 45 is shown diagrammatically by the arrow A3 in FIG. 2. As shown by the arrow A3 in FIG. 2, the air that has passed through the air flow path 45 is injected from the air injection port 45a into the internal space 2b of the furnace 2.
  • a swirler 46 is provided in the air flow path 45.
  • the swirler 46 has swirling blades that impart a swirling force in the circumferential direction of the burner 4 to the air flowing through the air flow path 45. Therefore, the air injected from the air injection port 45a of the air flow path 45 is sent to the internal space 2b of the furnace 2 while swirling in the circumferential direction of the burner 4.
  • FIG. 2 an example is shown in which there is one air path in the air flow path 45.
  • the air flow path 45 may be partially divided, and the air path in the air flow path 45 may branch.
  • a swirler 46 is installed at one location in the air flow direction in the air flow path 45.
  • multiple swirlers 46 may be installed at intervals in the air flow direction in the air flow path 45.
  • the control device 8 includes a central processing unit (CPU), a ROM in which programs and the like are stored, a RAM as a work area, and the like, and controls the entire combustion device 10.
  • the control device 8 controls the operation of the first flow control valve 6 and the second flow control valve 7.
  • the control device 8 can control the flow rate of ammonia injected from the first injection port 41a of the first ammonia nozzle 41 by controlling the aperture of the first flow control valve 6.
  • the control device 8 can control the flow rate of ammonia injected from the second injection port 42a of the second ammonia nozzle 42 by controlling the aperture of the second flow control valve 7.
  • FIG. 4 is a diagram for explaining the combustion state in the combustion device 10 according to this embodiment. As described above, ammonia is injected from the burner 4 into the internal space 2b of the furnace 2. As a result, as shown in FIG. 4, a flame F is formed in the internal space 2b of the furnace 2.
  • the air injected from the air injection port 45a of the air flow path 45 swirls in the circumferential direction of the burner 4.
  • ammonia is injected from the second injection port 42a of the second ammonia nozzle 42 toward the air swirling in the circumferential direction of the burner 4.
  • the ammonia injected from the second injection port 42a is effectively mixed with the air while swirling together with the air. Therefore, the ammonia injected from the second injection port 42a is quickly burned.
  • region R in FIG. 4 the ammonia injected from the second nozzle 42a is effectively mixed with the air.
  • Region R is formed near the tip of the burner 4 and is located radially outward of the burner 4 with respect to the flame F.
  • the flame F extends from the inside of region R into the furnace 2.
  • region R the ratio of air to ammonia is locally low.
  • the control device 8 controls the flow rate of the ammonia injected from the first nozzle 41a of the first ammonia nozzle 41 and the flow rate of the ammonia injected from the second nozzle 42a of the second ammonia nozzle 42 so that the flow rate of the ammonia injected from the second nozzle 42a is faster than the flow rate of the ammonia injected from the first nozzle 41a.
  • the magnitude relationship between the flow rate of the ammonia injected from the second nozzle 42a and the flow rate of the ammonia injected from the first nozzle 41a is expressed by the difference in thickness between the arrow A2 and the arrow A1.
  • the region R where the ratio of air to ammonia is locally low becomes larger compared to when the flow rate of the ammonia injected from the second nozzle 42a is slower than the flow rate of the ammonia injected from the first nozzle 41a.
  • the faster flow rate of the ammonia injected from the second nozzle 42a promotes mixing with the combustion air. Therefore, stable combustion can be achieved while suppressing the generation of NOx.
  • the injection direction of ammonia from the second injection port 42a is the circumferential direction of the burner 4 when the burner 4 is viewed from inside the furnace 2.
  • the ammonia injected from the second injection port 42a is more likely to be effectively mixed with the air while swirling with the air. Therefore, the combustion stability of the ammonia and the shape stability of the flame F are improved.
  • the injection direction of ammonia from the second injection port 42a is not limited to the example of FIG. 3.
  • the second injection port 42a may face the central axis direction of the second ammonia nozzle 42, and the injection direction of ammonia from the second injection port 42a may be the central axis direction of the burner 4.
  • the second injection port 42a does not have to face the tangential direction of the nozzle case 43 when viewed in the central axis direction of the burner 4, and may face radially inward or outward from the tangential direction.
  • the multiple second ammonia nozzles 42 are arranged at intervals in the circumferential direction surrounding the first ammonia nozzle 41. Therefore, ammonia is injected from each of the multiple second injection ports 42a that are separated from each other. As a result, the total contact area between the ammonia injected from the second injection port 42a and the air is larger than when, for example, the second ammonia nozzle 42 is a single cylindrical nozzle that covers the first ammonia nozzle 41 and ammonia is injected from a single second injection port 42a. Therefore, the ammonia is more likely to be effectively mixed with the air. This improves the combustion stability of the ammonia and the shape stability of the flame F.
  • FIG. 5 is a diagram for explaining the combustion state in the comparative example.
  • the flow rate of the ammonia injected from the first nozzle 41a of the first ammonia nozzle 41 and the flow rate of the ammonia injected from the second nozzle 42a of the second ammonia nozzle 42 are controlled so that the flow rate of the ammonia injected from the second nozzle 42a is slower than the flow rate of the ammonia injected from the first nozzle 41a.
  • the magnitude relationship between the flow rate of the ammonia injected from the second nozzle 42a and the flow rate of the ammonia injected from the first nozzle 41a is expressed by the difference in thickness between the arrow A2 and the arrow A1.
  • the flow rate of the ammonia injected from the second nozzle 42a is slower than the flow rate of the ammonia injected from the first nozzle 41a, so that the region R where the ratio of air to ammonia is locally low becomes smaller.
  • the slow flow rate of the ammonia injected from the second nozzle 42a makes it difficult to promote mixing with the combustion air. Therefore, it may be difficult to achieve stable combustion while suppressing the generation of NOx.
  • the combustion device 10 comprises at least one first ammonia nozzle 41 having a first injection port 41a facing the inside of the furnace (in the above example, the internal space 2b of the furnace 2), a plurality of second ammonia nozzles 42 having second injection ports 42a facing the inside of the furnace and arranged at intervals in the circumferential direction surrounding the at least one first ammonia nozzle 41 around the at least one first ammonia nozzle 41, an air flow path 45 that communicates with the inside of the furnace, is arranged around the plurality of second ammonia nozzles 42 and is provided with a swirler 46, and a control device 8 that controls the flow rate of ammonia injected from the first injection port 41a and the flow rate of ammonia injected from the second injection port 42a so that the flow rate of ammonia injected from the second injection port 42a is faster than the flow rate of ammonia injected from the first injection port 41a.
  • the flow rate of the ammonia injected from the second nozzle 42a becomes faster than the flow rate of the ammonia injected from the first nozzle 41a, and the region R where the ratio of air to ammonia becomes locally low becomes larger compared to the case where the flow rate of the ammonia injected from the second nozzle 42a is slower than the flow rate of the ammonia injected from the first nozzle 41a.
  • the high flow rate of the ammonia injected from the second nozzle 42a promotes mixing with the combustion air. Therefore, stable combustion can be achieved while suppressing the generation of NOx. As described above, the combustion device 10 can suppress the generation of NOx.
  • ammonia is injected from each of the multiple second injection ports 42a that are spaced apart from one another, so that the total contact area between the ammonia injected from the second injection ports 42a and the air is increased. This makes it easier for the ammonia to mix effectively with the air. This improves the combustion stability of the ammonia and the shape stability of the flame F.
  • FIG. 6 is a schematic diagram showing a combustion device 10A according to a first modified example.
  • the combustion device 10A differs from the above-described combustion device 10 in that the burner 4 is replaced with a burner 4A.
  • FIG. 7 is a front view showing the burner 4A according to the first modified example. Specifically, FIG. 7 is a view of the burner 4A as seen from inside the furnace 2.
  • the burner 4A differs from the burner 4 described above in that the burner 4A has a plurality of first ammonia nozzles 41.
  • the plurality of first ammonia nozzles 41 are arranged at intervals in the circumferential direction of the burner 4A.
  • the number of first ammonia nozzles 41 is four.
  • the number of first ammonia nozzles 41 may be other than four.
  • the plurality of first ammonia nozzles 41 are arranged at equal intervals in the circumferential direction of the burner 4A.
  • the plurality of first ammonia nozzles 41 may be arranged at unequal intervals in the circumferential direction of the burner 4A.
  • each first injection port 41a faces in a direction inclined with respect to the central axis direction of the burner 4A.
  • the flow of ammonia injected from the first injection port 41a is shown diagrammatically by arrow A1 in Figures 6 and 7.
  • the injection direction of ammonia from each first injection port 41a is toward the central axis of the burner 4A when viewed from the internal space 2b of the furnace 2.
  • each first injection port 41a faces the circumferential center of the burner 4A when viewed from the internal space 2b of the furnace 2.
  • At least one first ammonia nozzle 41 includes a plurality of first ammonia nozzles 41 arranged at intervals in the circumferential direction (i.e., the circumferential direction of the burner 4A) in which a plurality of second ammonia nozzles 42 surround at least one first ammonia nozzle 41, and the first injection port 41a of each of the plurality of first ammonia nozzles 41 faces the center in the circumferential direction when viewed from inside the furnace (in the above example, the internal space 2b of the furnace 2).
  • FIG. 8 is a schematic diagram showing a combustion device 10B according to a second modified example.
  • the combustion device 10B differs from the combustion device 10 described above in that the burner 4 is replaced with a burner 4B.
  • burner 4B differs from the burner 4 described above in that the second ammonia nozzle 42 is arranged to be rotatable around the central axis of the second ammonia nozzle 42.
  • the second ammonia nozzle 42 is supported by a bearing (not shown) to be rotatable.
  • the burner 4B is provided with a drive device 47 that rotates the second ammonia nozzle 42.
  • the drive device 47 is a motor that rotates the second ammonia nozzle 42, and is provided for each second ammonia nozzle 42.
  • the control device 8 can rotate the second ammonia nozzle 42 by controlling the operation of the drive device 47.
  • the second ammonia nozzle 42 is provided so as to be rotatable about the central axis of the second ammonia nozzle 42.
  • the second injection port 42a faces in a direction inclined with respect to the central axis direction of the second ammonia nozzle 42. Therefore, by rotating the second ammonia nozzle 42, the injection direction of ammonia from the second injection port 42a can be changed.
  • the injection direction of ammonia from the second injection port 42a can be adjusted according to the combustion state such as the shape of the flame F in the combustion device 10B. This makes it possible to more appropriately improve the performance of suppressing the generation of NOx, the combustion stability of ammonia, and the shape stability of the flame F according to the combustion state in the combustion device 10B.
  • the combustion device 10B according to the second modified example is an example of the above-mentioned combustion device 10 in which the second ammonia nozzle 42 is made rotatable and a drive unit 47 is added.
  • the second ammonia nozzle 42 may be made rotatable and a drive unit 47 may be added to the above-mentioned combustion device 10A according to the first modified example.
  • combustion devices 10, 10A, and 10B are provided in the furnace 2 of the boiler 1.
  • the combustion devices 10, 10A, and 10B can be used in various furnaces in facilities other than the boiler 1.
  • burners 4, 4A, and 4B that inject ammonia as fuel are provided in the furnace 2 of the boiler 1.
  • the furnace 2 of the boiler 1 may also be provided with a burner that injects pulverized coal as fuel.
  • the burners 4, 4A, and 4B inject ammonia as fuel.
  • the burners 4, 4A, and 4B may inject pulverized coal as fuel in addition to ammonia.
  • the disclosure can promote the use of ammonia to reduce CO2 emissions, thereby contributing, for example, to Sustainable Development Goal (SDG) Goal 7 "Ensure access to affordable, reliable, sustainable and modern energy” and Goal 13 "Take urgent action to combat climate change and its impacts.”
  • SDG Sustainable Development Goal

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)

Abstract

L'invention concerne un dispositif de combustion (10) comprenant : au moins une première buse d'ammoniac (41) qui a un premier orifice d'injection (41a) qui fait face à l'intérieur d'un four ; une pluralité de secondes buses d'ammoniac (42) qui ont chacune un second orifice d'injection (42a) qui fait face à l'intérieur du four et qui sont agencées autour de la ou des premières buses d'ammoniac (41) à des intervalles dans la direction périphérique entourant la ou les premières buses d'ammoniac (41) ; un trajet d'écoulement d'air (45) qui est en communication avec l'intérieur du four, qui est agencé autour de la pluralité de secondes buses d'ammoniac (42) et qui est pourvu d'un dispositif de turbulence (46) ; et un dispositif de commande (8) qui commande le débit d'ammoniac évacué du premier orifice d'injection (41a) et le débit d'ammoniac évacué du second orifice d'injection (42a) de telle sorte que le débit d'ammoniac évacué du second orifice d'injection (42a) est supérieur au débit d'ammoniac évacué du premier orifice d'injection (41a).
PCT/JP2023/032976 2022-12-09 2023-09-11 Dispositif de combustion WO2024122143A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-196868 2022-12-09
JP2022196868 2022-12-09

Publications (1)

Publication Number Publication Date
WO2024122143A1 true WO2024122143A1 (fr) 2024-06-13

Family

ID=91378745

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/032976 WO2024122143A1 (fr) 2022-12-09 2023-09-11 Dispositif de combustion

Country Status (1)

Country Link
WO (1) WO2024122143A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5168033U (fr) * 1974-11-26 1976-05-29
JP2015094583A (ja) * 2013-11-12 2015-05-18 韓国生産技術研究院Ｋｏｒｅａ Ｉｎｓｔｉｔｕｔｅ Ｏｆ Ｉｎｄｕｓｔｒｉａｌ Ｔｅｃｈｎｏｌｏｇｙ 燃焼ガスの内部再循環による超低窒素酸化物燃焼装置およびその運転方法
US20170307213A1 (en) * 2014-11-07 2017-10-26 Kiln Flame Systems Limited Burner
JP2020041748A (ja) * 2018-09-11 2020-03-19 株式会社Ihi 燃焼装置及びボイラ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5168033U (fr) * 1974-11-26 1976-05-29
JP2015094583A (ja) * 2013-11-12 2015-05-18 韓国生産技術研究院Ｋｏｒｅａ Ｉｎｓｔｉｔｕｔｅ Ｏｆ Ｉｎｄｕｓｔｒｉａｌ Ｔｅｃｈｎｏｌｏｇｙ 燃焼ガスの内部再循環による超低窒素酸化物燃焼装置およびその運転方法
US20170307213A1 (en) * 2014-11-07 2017-10-26 Kiln Flame Systems Limited Burner
JP2020041748A (ja) * 2018-09-11 2020-03-19 株式会社Ihi 燃焼装置及びボイラ

Similar Documents

Publication Publication Date Title
JP7485500B2 (ja) 燃焼装置及びボイラ
JP7027817B2 (ja) 燃焼装置及びボイラ
US20070272201A1 (en) Combustion Apparatus and Combustion Method
US20080193886A1 (en) Combustion Apparatus
BG64878B1 (bg) Горелка за твърдо гориво и метод за регулиране нагоренето, осъществявано от горелката за твърдо гориво
PL212230B1 (pl) Sposób spalania paliw węglowodorowych
JP6950464B2 (ja) ボイラ
KR20020000758A (ko) 접촉 연소 시스템 작동 방법
JP3664832B2 (ja) 微粉炭バーナ
WO2022176347A1 (fr) Dispositif de combustion et chaudière
JP2008209062A (ja) 燃焼バーナ、ボイラ、微粉炭の燃焼方法
WO2024122143A1 (fr) Dispositif de combustion
KR101328255B1 (ko) 연소속도가 다른 복수의 가스를 사용하는 버너
WO2023120700A1 (fr) Brûleur, chaudière équipée de celui-ci et procédé de fonctionnement de brûleur
KR20240129193A (ko) 버너 및 이것을 구비한 보일러 그리고 버너의 운전 방법
KR102686756B1 (ko) 연소 장치 및 보일러
JP4402683B2 (ja) 燃焼装置
JP7468772B2 (ja) 燃焼装置およびボイラ
JP3680659B2 (ja) 燃焼装置および燃焼方法
KR100372146B1 (ko) 질소산화물 저감용 미분탄 버너
TWI850917B (zh) 噴燃器及具備此之鍋爐以及噴燃器的運作方法
KR100372145B1 (ko) 질소산화물저감형미분탄버너
WO2023127919A1 (fr) Brûleur et four à combustion
WO2023120395A1 (fr) Brûleur à combustion d'ammoniac et chaudière
TWI855471B (zh) 噴燃器及具備此之鍋爐以及噴燃器的運作方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23900269

Country of ref document: EP

Kind code of ref document: A1