WO2024082443A1 - 一种氨煤混合燃烧系统 - Google Patents
一种氨煤混合燃烧系统 Download PDFInfo
- Publication number
- WO2024082443A1 WO2024082443A1 PCT/CN2022/142955 CN2022142955W WO2024082443A1 WO 2024082443 A1 WO2024082443 A1 WO 2024082443A1 CN 2022142955 W CN2022142955 W CN 2022142955W WO 2024082443 A1 WO2024082443 A1 WO 2024082443A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ammonia
- branch
- section
- combustion
- outlet
- Prior art date
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 184
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 151
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 63
- 239000003245 coal Substances 0.000 title claims abstract description 38
- 239000000446 fuel Substances 0.000 claims abstract description 30
- 238000005192 partition Methods 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 22
- 238000010586 diagram Methods 0.000 description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 101001121408 Homo sapiens L-amino-acid oxidase Proteins 0.000 description 2
- 102100026388 L-amino-acid oxidase Human genes 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 101000827703 Homo sapiens Polyphosphoinositide phosphatase Proteins 0.000 description 1
- 102100023591 Polyphosphoinositide phosphatase Human genes 0.000 description 1
- 101100012902 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) FIG2 gene Proteins 0.000 description 1
- 101100233916 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) KAR5 gene Proteins 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- F23D14/66—Preheating the combustion air or gas
-
- 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
-
- 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
- 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
- F23D14/62—Mixing devices; Mixing tubes
Definitions
- the present disclosure relates to the technical field of combustion equipment, and in particular, to an ammonia-coal mixed combustion system.
- the present disclosure aims to solve one of the technical problems in the related art at least to some extent.
- an embodiment of the present disclosure proposes an ammonia-coal mixed combustion system, which can achieve cascade utilization of ammonia and reduce the emission of harmful gases.
- a fuel storage tank device comprising a discharge port
- a combustion boiler comprising a boiler section and an exhaust section connected in sequence, the exhaust section comprising an exhaust port, the exhaust port being arranged on a side of the exhaust section away from the boiler section so as to discharge gas generated by the boiler section;
- a conveying assembly wherein the conveying assembly connects the discharge port with the combustion boiler so as to convey the fuel in the fuel storage tank device to the combustion boiler, the conveying assembly comprises a burner branch and a first branch, a second branch, a third branch and a fourth branch, the outlet of the burner branch is connected to the boiler section, the outlet of the first branch is connected to the exhaust section and is disposed adjacent to the boiler section, the outlet of the second branch and the outlet of the third branch are connected to the exhaust section and are both located downstream of the outlet of the first branch so as to cause an SNCR reaction at 850° C.-1100° C., and the outlet of the fourth branch is connected to the exhaust section and is disposed adjacent to the exhaust port;
- An SCR reactor is disposed in the exhaust section and between an outlet of the fourth branch and the exhaust port.
- the ammonia-coal mixed combustion system of the embodiment of the present disclosure uses multiple branches to transport ammonia to the combustion boiler, which can reduce the nitric oxide in the exhaust gas discharged from the combustion boiler after combustion into nitrogen, thereby reducing the emission of harmful substances. Therefore, the ammonia-coal mixed combustion system of the embodiment of the present disclosure can realize the cascade utilization of ammonia and reduce the emission of harmful gases.
- the fuel storage tank device also includes a liquid ammonia storage tank and a liquid ammonia evaporator, wherein the liquid ammonia storage tank and the liquid ammonia evaporator are connected to each other and are used to convert the ammonia in the liquid ammonia storage tank from liquid to gaseous state, and the outlet of the liquid ammonia evaporator forms a discharge port for discharging vaporized ammonia; the exhaust section is located downstream of the boiler section.
- one end of the combustion branch is connected to the discharge port, and the other end of the combustion branch is used to introduce ammonia into the boiler section;
- one end of the first branch is connected to the discharge port, and the outlet of the other end of the first branch is arranged in the exhaust section, which is used to introduce ammonia into the exhaust section;
- one end of the second branch is connected to the discharge port, and the outlet of the other end of the second branch is arranged in the exhaust section;
- one end of the third branch is connected to the discharge port, and the outlet of the other end of the third branch is arranged in the exhaust section;
- one end of the fourth branch is connected to the discharge port, and the outlet of the other end of the fourth branch is arranged in the exhaust section.
- the combustion boiler further includes a partition screen and a graded air inlet, wherein the graded air inlet is arranged in the exhaust section and located between the outlet of the first branch and the outlet of the second branch, and the partition screen is arranged between the outlet of the second branch and the outlet of the third branch.
- the combustion boiler includes a furnace wall surrounded by multiple side walls and multiple combustion components.
- the furnace wall includes a mounting portion, and the mounting portion is formed between two connected side walls.
- the combustion components are arranged on the mounting portions.
- the combustion assembly includes a frame, a first burner group and a second burner group, the first burner group includes multiple first burners, the first burner includes a first nozzle, and the multiple first nozzles are arranged on the frame and spaced apart along the height direction of the frame; the second burner group includes multiple second burners, the second burner includes a second nozzle, and the multiple second nozzles are arranged on the frame, at least one of the multiple second nozzles is located on one side of the first burner group, and at least one of the multiple second nozzles is located on the other side of the first burner group.
- multiple first nozzles are arranged in the middle section of the frame, and the gaps between the multiple first nozzles are evenly set; at least one of the multiple second nozzles is arranged above the first burner group, and at least one of the multiple second nozzles is arranged below the burner group.
- the second burner includes a barrel and an ignition device, the barrel having a combustion chamber, one end of the barrel forming the second nozzle, the ignition device including an igniter and a mixed combustion nozzle, the mixed combustion nozzle being arranged in the combustion chamber, the mixed combustion nozzle including a shell, the shell having a cavity and a first air inlet and a second air inlet connected to the cavity, the first air inlet being used to be connected to an ammonia gas source, the second air inlet being used to be connected to an air gas source, so that air and ammonia are mixed in the cavity to form a mixed gas, the igniter is connected to the mixed combustion nozzle to ignite the mixed gas in the cavity; the second burner also includes a first heater and a second heater, the first heater being used to heat the ammonia passing into the first air inlet, the second heater being used to heat the air passing into the second air inlet.
- the second burner also includes an ammonia supply pipeline and an air supply pipeline, one end of the ammonia supply pipeline is connected to the ammonia gas source, and the other end of the ammonia supply pipeline is connected to the cavity through the first air inlet, and the first heater is arranged on the ammonia supply pipeline, one end of the air supply pipeline is connected to the air source, and the other end of the air supply pipeline is connected to the cavity through the second air inlet, and the second heater is arranged on the air supply pipeline.
- the shell includes a combustion port and an ignition section and a combustion section connected in sequence, the ignition section is located below the combustion section in the height direction of the mixed combustion nozzle, the first air inlet and the second air inlet are both provided on the ignition section, the combustion port is provided at one end of the combustion section away from the ignition section, the igniter is provided in the ignition section, and the cross-sectional area of the combustion section gradually decreases in the direction from the ignition section to the combustion section.
- the mixed combustion nozzle also includes a first connecting pipe and a second connecting pipe, one end of the first connecting pipe is connected to the ignition section, and the other end of the first connecting pipe forms the first air inlet, and one end of the second connecting pipe is connected to the ignition section, and the other end of the second connecting pipe forms the second air inlet.
- the cross-sectional area of the ignition section is constant along the height direction of the co-combustion nozzle, and the axis of the first connecting pipe and/or the axis of the second connecting pipe are orthogonal to the axis of the ignition section.
- an axis of the first connecting tube is parallel to an axis of the second connecting tube, and a gap exists between the axis of the first connecting tube and the axis of the second connecting tube.
- the cylinder includes an inner casing, a middle casing and an outer casing, the middle casing is sleeved on the outside of the inner casing, the outer casing is sleeved on the outside of the middle casing, one end of the inner casing is used for introducing fuel, one end of the middle casing and one end of the outer casing are both used for introducing air, the inner casing includes a lumen, and the lumen is adjacent to the other end of the inner casing to form the combustion chamber.
- the other end of the middle casing is located between the other end of the inner casing and the other end of the outer casing.
- FIG1 is a schematic structural diagram of an ammonia-coal mixed combustion system according to an embodiment of the present disclosure.
- FIG2 is a schematic diagram of the structure of a combustion boiler of an ammonia-coal mixed combustion system according to an embodiment of the present disclosure.
- FIG3 is a schematic diagram of the structure of the combustion assembly of the ammonia-coal mixed combustion system according to an embodiment of the present disclosure.
- FIG4 is a schematic diagram of the structure of the combustion assembly of the ammonia-coal mixed combustion system according to an embodiment of the present disclosure.
- FIG5 is a schematic diagram of the structure of the second burner of the ammonia-coal mixed combustion system of the embodiment of the present disclosure.
- FIG6 is a schematic diagram of the structure of the co-combustion nozzle of the ammonia-coal co-combustion system according to an embodiment of the present invention.
- FIG. 7 is a schematic diagram of the structure of the co-combustion nozzle of the ammonia-coal co-combustion system according to an embodiment of the present disclosure.
- FIG8 is a schematic cross-sectional view taken along line A-A in FIG7 .
- Fuel storage tank device 1 liquid ammonia storage tank 11; liquid ammonia evaporator 12; discharge port 121;
- Combustion boiler 2 boiler section 21; exhaust section 22; exhaust port 221; furnace wall 23; mounting portion 231; combustion assembly 24; frame 241; first burner 242; first nozzle 2421;
- the second burner 3 a barrel 31; a second nozzle 311; an inner sleeve 312; a combustion chamber 3121; a middle sleeve 313; an outer sleeve 314;
- Ignition device 32 igniter 321; mixed combustion nozzle 322; housing 3221; cavity 3222; ignition section 32211; first air inlet 32212; second air inlet 32213; combustion section 32214; combustion port 32215; first connecting pipe 3223; second connecting pipe 3224;
- the ammonia-coal mixed combustion system of the embodiment of the present disclosure includes: a fuel storage tank device 1 , a combustion boiler 2 , a conveying component 6 and an SCR reactor 7 .
- the fuel storage tank device 1 includes a discharge port 121.
- the combustion boiler 2 includes a boiler section 21 and an exhaust section 22 connected in sequence.
- the exhaust section 22 includes an exhaust port, which is arranged on a side of the exhaust section 22 away from the boiler section 21 to discharge the gas generated by the boiler section 21.
- the fuel storage tank device 1 further includes a liquid ammonia storage tank 11 and a liquid ammonia evaporator 12, which are connected to convert the ammonia in the liquid ammonia storage tank 11 from liquid to gaseous state, and the outlet of the liquid ammonia evaporator 12 forms a discharge port 121 to discharge the gasified ammonia.
- the exhaust section 22 is located downstream of the boiler section 21, that is, the exhaust gas generated by the combustion in the boiler section 21 can pass through the exhaust section 22 and be discharged from the exhaust port.
- the conveying component 6 connects the discharge port 121 with the combustion boiler 2 so as to convey the fuel in the fuel storage tank device 1 to the combustion boiler 2.
- the conveying component 6 includes a burner branch 61 and a first branch 62, a second branch 63, a third branch 64, and a fourth branch 65.
- the outlet of the burner branch 61 is connected to the boiler section 21, the outlet of the first branch 62 is connected to the exhaust section 22 and is arranged adjacent to the boiler section 21, the outlet of the second branch 63 and the outlet of the third branch 64 are connected to the exhaust section 22 and are both located downstream of the outlet of the first branch 62 so that an SNCR reaction occurs at 850°C-1100°C, and the outlet of the fourth branch 65 is connected to the exhaust section 22 and is arranged adjacent to the exhaust port.
- the SCR reactor 7 is disposed in the exhaust section 22 and is located between the outlet of the fourth branch 65 and the exhaust port.
- one end of the combustion branch is connected to the discharge port 121, and the other end of the combustion branch is used to introduce ammonia into the boiler section 21.
- One end of the first branch 62 is connected to the discharge port 121, and the outlet of the other end of the first branch 62 is arranged in the exhaust section 22, so as to introduce ammonia into the exhaust section 22.
- one end of the second branch 63 is connected to the discharge port 121, and the outlet of the other end of the second branch 63 is arranged in the exhaust section 22;
- one end of the third branch 64 is connected to the discharge port 121, and the outlet of the other end of the third branch 64 is arranged in the exhaust section 22;
- one end of the fourth branch 65 is connected to the discharge port 121, and the outlet of the other end of the fourth branch 65 is arranged in the exhaust section 22.
- the combustion boiler 2 also includes a partition screen 9 and a graded air port 8.
- the graded air port 8 is arranged in the exhaust section 22 and is located between the outlet of the first branch 62 and the outlet of the second branch 63.
- the partition screen 9 is arranged between the outlet of the second branch 63 and the outlet of the third branch 64.
- the temperature of the flue gas after combustion in the boiler section 21 will gradually decrease as it is discharged from the exhaust section 22, that is, the temperature of the flue gas adjacent to the boiler section 21 is the highest, and the temperature at the outlet of the first branch 62, the temperature at the outlet of the second branch 63, the temperature at the outlet of the third branch 64, and the temperature at the outlet of the fourth branch 65 will gradually decrease.
- outlet of the second branch 63 is located on the side of the partition screen 9 adjacent to the boiler section 21
- outlet of the third branch 64 is located on the side of the partition screen 9 adjacent to the outlet of the third branch 64 .
- the ammonia-coal mixed combustion system of the embodiment of the present disclosure utilizes multiple branches to transport ammonia into the combustion boiler 2, and utilizes the transport component 6 to introduce ammonia into different temperature sections of the combustion boiler 2, so that the nitric oxide in the exhaust gas discharged after combustion in the combustion boiler 2 can be reduced into nitrogen, thereby reducing the emission of harmful substances.
- the ammonia-coal mixed combustion system of the embodiment of the present disclosure can achieve the cascade utilization of ammonia and reduce the emission of harmful gases.
- the combustion boiler 2 includes a furnace wall 23 surrounded by multiple side walls and multiple combustion components 24.
- the furnace wall 23 includes a mounting portion 231.
- the mounting portion 231 is formed between two connected side walls.
- the multiple combustion components 24 correspond one-to-one to the multiple mounting portions 231.
- the combustion components 24 are arranged on the mounting portions 231.
- the tangentially fired boiler 2 is a square tangentially fired boiler 2
- the plurality of side walls form a regular quadrilateral in cross section
- the mounting portion 231 is formed at the vertex of the regular quadrilateral.
- the two connected side walls are connected by a connecting section, and the connecting section is located at one side of the furnace chamber of the tangentially-fired boiler 2 to form a mounting portion 231 .
- the combustion assembly 24 includes a frame 241, a first burner 242 group and a second burner 3 group
- the first burner 242 group includes multiple first burners 242
- the first burner 242 includes a first nozzle 2421
- the multiple first nozzles 2421 are arranged on the frame 241 and arranged at intervals along the height direction of the frame 241
- the second burner 3 group includes multiple second burners 3
- the second burner 3 includes a second nozzle 311, and the multiple second nozzles 311 are arranged on the frame 241, at least one of the multiple second nozzles 311 is located on one side of the first burner 242 group, and at least one of the multiple second nozzles 311 is located on the other side of the first burner 242 group.
- a plurality of first nozzles 2421 are arranged in the middle section of the frame 241, and the gaps between the plurality of first nozzles 2421 are evenly arranged, so that the combustion effect of the plurality of first burners 242 is better, more uniform and more stable when in use.
- At least one of the plurality of second nozzles 311 is arranged above the first burner 242 group, and at least one of the plurality of second nozzles 311 is arranged below the burner group.
- two of the plurality of second nozzles 311 are disposed above the first burner group 242 , and one of the plurality of second nozzles 311 is disposed below the first burner group 242 .
- the first burner 242 may be a direct current burner.
- the second burner 3 includes a cylinder 31 and an ignition device 32.
- the cylinder 31 has a combustion chamber 3121.
- a second nozzle 311 is formed at one end of the cylinder 31.
- the ignition device 32 includes an igniter 321 and a mixed combustion nozzle 322.
- the mixed combustion nozzle 322 is arranged in the combustion chamber 3121.
- the mixed combustion nozzle 322 includes a shell 3221.
- the shell 3221 has a cavity 3222 and a first air inlet 32212 and a second air inlet 32213 connected to the cavity 3222.
- the first air inlet 32212 is used to be connected to an ammonia gas source
- the second air inlet 32213 is used to be connected to an air gas source so that air and ammonia are mixed in the cavity 3222 to form a mixed gas.
- the igniter 321 is connected to the mixed combustion nozzle 322 to ignite the mixed gas in the cavity 3222.
- the second burner 3 also includes a first heater 41 and a second heater 51. The first heater 41 is used to heat the ammonia entering the first air inlet 32212, and the second heater 51 is used to heat the air entering the second air inlet 32213.
- the cavity 3222 of the mixed combustion nozzle 322 includes a mixture of heated ammonia and air, so that the mixture can be more conveniently ignited by the igniter 321.
- Fuel or a mixture of fuel and air can be introduced into the combustion chamber 3121 of the cylinder 31, so that the ignited mixture can be used to ignite the fuel in the combustion chamber 3121, thereby improving the combustion effect of the combustion assembly 24 of the embodiment of the present disclosure.
- the second burner 3 in the ammonia-coal mixed combustion system of the embodiment of the present disclosure can preheat the ammonia and the air separately before they are introduced into the mixed combustion nozzle 322, which can reduce the ignition energy and facilitate ignition.
- the combustion assembly 24 of the embodiment of the present disclosure can preheat the ammonia and the air separately, thereby improving the safety during ignition.
- the second burner 3 can be an ammonia coal burner, that is, when the combustion assembly 24 of the embodiment of the present disclosure is installed in the boiler for use, since the burnout path of the pulverized coal is long, the two second burners 3 are arranged above the first burner 242 group to ensure the full combustion of the pulverized coal. In addition, if the boiler is under low load, a second burner 3 is arranged below the first burner 242 group, so that the combustion assembly 24 can have a better stable combustion effect.
- the second burner 3 also includes an ammonia supply pipeline 4 and an air supply pipeline 5, one end of the ammonia supply pipeline 4 is connected to an ammonia gas source, and the other end of the ammonia supply pipeline 4 is connected to the cavity 3222 through a first air inlet 32212, a first heater 41 is disposed on the ammonia supply pipeline 4, one end of the air supply pipeline 5 is connected to an air source, and the other end of the air supply pipeline 5 is connected to the cavity 3222 through a second air inlet 32213, and a second heater 51 is disposed on the air supply pipeline 5.
- the other end of the ammonia supply pipeline 4 is connected to the shell body 3221, and the outlet of the ammonia supply pipeline 4 is connected to the cavity 3222 of the mixed combustion nozzle 322, so that ammonia can be passed into the cavity 3222 of the mixed combustion nozzle 322 through the first air inlet 32212, and the other end of the air supply pipeline 5 is connected to the shell body 3221, and the outlet of the air supply pipeline 5 is connected to the cavity 3222 of the mixed combustion nozzle 322, so that air can be passed into the cavity 3222 of the mixed combustion nozzle 322 through the second air inlet 32213.
- the first heater 41 is provided on the ammonia supply pipeline 4, and can heat the ammonia on the ammonia supply pipeline 4, and then pass the heated ammonia into the cavity 3222 of the co-combustion nozzle 322 through the first air inlet 32212.
- the second heater 51 is provided on the air supply pipeline 5, and can heat the air on the air supply pipeline 5, and then pass the heated air into the cavity 3222 of the co-combustion nozzle 322 through the second air inlet 32213. Heating the mixed ammonia and air is avoided, so as to ensure the safety of the combustion assembly 24 of the embodiment of the present disclosure.
- the shell 3221 includes a combustion port 32215 and an ignition section 32211 and a combustion section 32214 connected in sequence, the ignition section 32211 is located below the combustion section 32214 in the height direction of the mixed combustion nozzle 322, the first air inlet 32212 and the second air inlet 32213 are both provided on the ignition section 32211, the combustion port 32215 is provided at one end of the combustion section 32214 away from the ignition section 32211, and the igniter 321 is provided in the ignition section 32211.
- the combustion section 32214 is located above the ignition section 32211 , ammonia can enter the ignition section 32211 through the first air inlet 32212 , and air can enter the ignition section 32211 through the second air inlet 32213 .
- combustion port 32215 is arranged at the upper end of the combustion section 32214 and away from the first air inlet 32212 and the second air inlet 32213, thereby further facilitating the mixing of ammonia and air. After the ammonia and air are mixed, the igniter 321 located in the ignition section 32211 can be used to ignite the mixture.
- the cross-sectional area of the combustion section 32214 gradually decreases in the direction from the ignition section 32211 to the combustion section 32214. As shown in the figure, the cross-sectional area of the combustion section 32214 gradually decreases from bottom to top, that is, after the mixed gas in the cavity 3222 of the co-combustion nozzle 322 is ignited, the combustion section 32214 has a structure that is wide at the bottom and narrow at the top, so that the burning flame can be sprayed farther and more concentrated.
- the mixed combustion nozzle 322 also includes a first connecting pipe 3223 and a second connecting pipe 3224, one end of the first connecting pipe 3223 is connected to the ignition section 32211, and the other end of the first connecting pipe 3223 forms a first air inlet 32212, one end of the second connecting pipe 3224 is connected to the ignition section 32211, and the other end of the second connecting pipe 3224 forms a second air inlet 32213.
- the rear end of the first connecting tube 3223 is connected to the ignition section 32211, the front end opening of the first connecting tube 3223 forms a first air inlet 32212, the front end of the second connecting tube 3224 is connected to the ignition section 32211, and the rear end opening of the second connecting tube 3224 forms a second air inlet 32213.
- first connecting pipe 3223 is connected between the ammonia supply pipeline 4 and the co-combustion nozzle 322 to facilitate the connection of the ammonia supply pipeline 4, that is, the opening shape of the first connecting pipe 3223 can be changed according to the different shapes of the ammonia outlet of the ammonia supply pipeline to adapt to ammonia outlets of different shapes.
- second connecting pipe 3224 is connected between the gas supply pipeline 5 and the co-combustion nozzle 322 to facilitate the connection of the gas supply pipeline 5.
- the cross-sectional area of the ignition section 32211 is constant along the height direction of the co-combustion nozzle 322 , and the axis of the first connecting pipe 3223 and/or the axis of the second connecting pipe 3224 are orthogonal to the axis of the ignition section 32211 .
- the cross section of the ignition section 32211 is circular, that is, the ignition section 32211 is cylindrical.
- the axis of the first connecting pipe 3223 is orthogonal to the axis of the ignition section 32211; or, the axis of the second connecting pipe 3224 is orthogonal to the axis of the ignition section 32211; or, the axis of the first connecting pipe 3223 and the axis of the second connecting pipe 3224 are both orthogonal to the axis of the ignition section 32211.
- extension direction of the axis of the ignition section 32211 is consistent with the up-down direction, and the extension direction of at least one of the axis of the first connecting tube 3223 and the axis of the second connecting tube 3224 is orthogonal to the up-down direction.
- the axis of the first connecting tube 3223 is parallel to the axis of the second connecting tube 3224, and there is a gap between the axis of the first connecting tube 3223 and the axis of the second connecting tube 3224. It can be understood that, for example, as shown in the figure, the extending direction of the axis of the first connecting tube 3223 and the extending direction of the axis of the second connecting tube 3224 are consistent with the front-to-back direction, and there is a gap between the axis of the first connecting tube 3223 and the axis of the second connecting tube 3224 in the left-right direction.
- ammonia and air enter the cavity 3222 of the mixing nozzle 322 through the first connecting pipe 3223 and the second connecting pipe 3224 respectively.
- the flow direction of the gas is tangent to the side wall of the ignition section 32211, so that the ammonia and air are mixed in a ring shape in the mixing nozzle 322, thereby making the mixing more complete and facilitating the ignition of the mixed gas.
- the cylinder 31 includes an inner casing 312, a middle casing 313 and an outer casing 314.
- the middle casing 313 is sleeved on the outside of the inner casing 312, and the outer casing 314 is sleeved on the outside of the middle casing 313.
- One end of the inner casing 312 is used for introducing fuel
- one end of the middle casing 313 and one end of the outer casing 314 are both used for introducing air
- the interior of the other end of the inner casing 312 forms a combustion chamber 3121.
- the middle sleeve 313 is sleeved on the inner sleeve 312, and there is a gap between the inner wall surface of the left end of the middle sleeve 313 and the outer wall surface of the left end of the inner sleeve 312, and the outer sleeve 314 is sleeved on the middle sleeve 313, and there is a gap between the inner wall surface of the outer sleeve 314 and the outer wall surface of the middle sleeve 313.
- the inner casing 312 is used to pass fuel or a mixture of fuel and air into the combustion chamber 3121, so that the flame ejected from the mixing nozzle 322 can be used to ignite the fuel in the combustion chamber 3121, and the middle casing 313 and the outer casing 314 are used to pass air to provide the air required for fuel combustion, thereby ensuring the combustion effect.
- the end surface of the other end of the middle casing 313 is located between the end surface of the other end of the inner casing 312 and the end surface of the other end of the outer casing 314 .
- the left end surface of the middle casing 313 is located between the left end surface of the inner casing 312 and the left end surface of the outer casing 314 .
- the left end surface of the middle casing 313 and the left end surface of the outer casing 314 are both located on the left side of the left end surface of the inner casing 312, which can better provide the required oxygen for fuel combustion, thereby making the combustion effect of the burner of the embodiment of the present disclosure better.
- first and second are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
- a feature defined as “first” or “second” may explicitly or implicitly include at least one of the features.
- “plurality” means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
- the terms “installed”, “connected”, “connected”, “fixed” and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined.
- installed installed”, “connected”, “connected”, “fixed” and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined.
- the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.
- a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium.
- a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
- a first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
- the terms “one embodiment”, “some embodiments”, “examples”, “specific examples”, or “some examples” etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure.
- the schematic representations of the above terms do not necessarily refer to the same embodiment or example.
- the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner.
- those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.
Abstract
本公开提出一种氨煤混合燃烧系统，所述氨煤混合燃烧系统包括：燃料储罐装置、燃烧锅炉、输送组件和SCR反应器。燃料储罐装置包括出料口，燃烧锅炉包括依次相连的锅炉段和排气段，排气段包括排气口，排气口设在排气段远离锅炉段一侧，输送组件连通出料口与燃烧锅炉，输送组件包括燃烧器支路和第一支路、第二支路、第三支路、第四支路，燃烧器支路的出口与锅炉段相连，第一支路的出口与排气段相连且邻近锅炉段设置，第二支路的出口与第三支路的出口与排气段相连且均位于第一支路的出口的下游，第四支路的出口邻近排气口设置，SCR反应器设在第四支路的出口与排气口之间。
Description
相关申请的交叉引用
本申请基于申请号为202211275223.X、申请日为2022年10月18日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
本公开涉及燃烧设备技术领域，具体地，涉及一种氨煤混合燃烧系统。
在碳达峰碳中和背景下，氨替代传统化石燃料，成为未来发展的趋势之一。目前国内发电设备以燃煤发电为主。相关技术中，煤粉燃烧过程中会利用煤粉与氨气混合燃烧，但在燃烧过程中会产生一氧化氮等有害气体的排放，污染环境。
发明内容
本公开旨在至少在一定程度上解决相关技术中的技术问题之一。
为此，本公开的实施例提出一种氨煤混合燃烧系统，该氨煤混合燃烧系统能够实现氨气的梯级利用，降低有害气体的排放。
本公开实施例的氨煤混合燃烧系统包括：
燃料储罐装置，所述燃料储罐装置包括出料口；
燃烧锅炉，所述燃烧锅炉包括依次相连的锅炉段和排气段，所述排气段包括排气口，所述排气口设在所述排气段远离所述锅炉段一侧，以便排出所述锅炉段产生的气体；
输送组件，所述输送组件连通所述出料口与所述燃烧锅炉，以便将所述燃料储罐装置中的燃料输送至所述燃烧锅炉内，所述输送组件包括燃烧器支路和第一支路、第二支路、第三支路、第四支路，所述燃烧器支路的出口与所述锅炉段相连，所述第一支路的出口与所述排气段相连且邻近所述锅炉段设置，所述第二支路的出口与所述第三支路的出口与所述排气段相连且均位于所述第一支路的出口的下游，以便在850℃-1100℃发生SNCR反应，所述第四支路的出口与所述排气段相连且邻近所述排气口设置；
SCR反应器，所述SCR反应器设在所述排气段且位于所述第四支路的出口与所述排气口之间。
本公开实施例的氨煤混合燃烧系统利用多个支路将氨气输送到燃烧锅炉内，可以将燃烧锅炉燃烧后排出的废气中的一氧化氮还原成氮气，减少有害物质的排放。因此，本公开实施例的氨煤混合燃烧系统能够实现氨气的梯级利用，降低有害气体的排放。
在一些实施例中，所述燃料储罐装置还包括液氨储罐和液氨蒸发器，所述液氨储罐和所述液氨蒸发器相连，用于将所述液氨储罐中的氨由液态转化为气态，所述液氨蒸发器的出口形成出料口，用于排出气化的氨气；所述排气段位于所述锅炉段的下游。
在一些实施例中，所述燃烧支路的一端与所述出料口相连，所述燃烧支路的另一端用于向所述锅炉段通入氨气；所述第一支路的一端与所述出料口相连，所述第一支路的另一端的出口设在所述排气段内，用于向所述排气段通入氨气；所述第二支路的一端与所述出料口相连，所述第二支路的另一端的出口设在所述排气段内；所述第三支路的一端与所述出料口相连，所述第三支路的另一端的出口设在所述排气段内；所述第四支路的一端与所述出料口相连，所述第四支路的另一端的出口设在所述排气段内。
在一些实施例中，所述燃烧锅炉还包括分隔屏和分级风口，所述分级风口设在所述排气段，且位于所述第一支路的出口和所述第二支路的出口之间，所述分隔屏设在所述第二支路的出口和所述第三支路的出口之间。
在一些实施例中，所述燃烧锅炉包括多个侧壁围成的炉壁和多个燃烧组件，所述炉壁包括安装部，相连的两个所述侧壁之间形成所述安装部，所述燃烧组件有多个，多个所述燃烧组件与多个所述安装部一一对应，所述燃烧组件设在所述安装部上。
在一些实施例中，所述燃烧组件包括架体、第一燃烧器组和第二燃烧器组，所述第一燃烧器组包括多个第一燃烧器，所述第一燃烧器包括第一喷口，多个所述第一喷口设在所述架体上沿所述架体的高度方向间隔布置；所述第二燃烧器组包括多个第二燃烧器，所述第二燃烧器包括第二喷口，多个所述第二喷口设在所述架体上，多个所述第二喷口中的至少一个位于所述第一燃烧器组的一侧，多个所述第二喷口中的至少一个位于所述第一燃烧器组的另一侧。
在一些实施例中，多个所述第一喷口设在所述架体的中段，且多个所述第一喷口之间的间隙均匀设置；多个所述第二喷口中的至少一个设在所述第一燃烧器组的上方，且多个所述第二喷口中的至少一个设在所述燃烧器组的下方。
在一些实施例中，所述第二燃烧器包括筒体和点火装置，所述筒体具有燃烧室，所述筒体的一端形成所述第二喷口，所述点火装置包括点火器和混燃喷嘴，所述混燃喷嘴设在所述燃烧室内，所述混燃喷嘴包括壳体，所述壳体具有空腔以及与所述空腔连通的第一进气口和第二进气口，所述第一进气口用于与氨气气源相连，所述第二进气口用于与空气气源相连，以使空气与氨气在所述空腔内混合形成混合气，所述点火器与所述混燃喷嘴相连，以便点燃所空腔内的混合气；所述第二燃烧器还包括第一加热器和第二加热器，所述第一加热器用于加热通入所述第一进气口的氨气，所述第二加热器用于加热通入所述第二进气口的空气。
在一些实施例中，所述第二燃烧器还包括供氨管路和供气管路，所述供氨管路的一端与所述氨气气源相连，所述供氨管路的另一端通过所述第一进气口连通所述空腔，所述第一加热器设在所述供氨管路上，所述供气管路的一端与所述空气气源相连，所述供气管路的另一端通过所述第二进气口连通所述空腔相连，所述第二加热器设在所述供气管路上。
在一些实施例中，所述壳体包括燃烧口和依次相连的点火段和燃烧段，所述点火段在所述混燃喷嘴的高度方向位于所述燃烧段的下方，所述第一进气口和所述第二进气口 均设在所述点火段上，所述燃烧口设在所述燃烧段远离所述点火段的一端，所述点火器设在所述点火段，所述燃烧段的横截面积在由所述点火段指向所述燃烧段的方向上逐渐减小。
在一些实施例中，所述混燃喷嘴还包括第一连接管和第二连接管，所述第一连接管的一端与所述点火段相连，所述第一连接管的另一端形成所述第一进气口，所述第二连接管的一端与所述点火段相连，所述第二连接管的另一端形成所述第二进气口。
在一些实施例中，所述点火段的横截面积沿所述混燃喷嘴的高度方向恒定，所述第一连接管的轴线和/或所述第二连接管的轴线正交于所述点火段的轴线。
在一些实施例中，所述第一连接管的轴线与所述第二连接管的轴线平行，所述第一连接管的轴线与所述第二连接管的轴线之间具有间隙。
在一些实施例中，所述筒体包括内层套管、中层套管和外层套管，所述中层套管套设在所述内层套管外侧，所述外层套管套设在所述中层套管外侧，所述内层套管的一端用于通入燃料，所述中层套管的一端和所述外层套管的一端均用于通入空气，所述内层套管包括管腔，所述管腔邻近所述内层套管的另一端形成所述燃烧室。
在一些实施例中，所述中层套管的另一端位于所述内层套管的另一端和所述外层套管的另一端之间。
图1是本公开实施例的氨煤混合燃烧系统的结构示意图。
图2是本公开实施例的氨煤混合燃烧系统的燃烧锅炉的结构示意图。
图3是本公开实施例的氨煤混合燃烧系统的燃烧组件的结构示意图。
图4是本公开实施例的氨煤混合燃烧系统的燃烧组件的结构示意图。
图5是本公开实施例的氨煤混合燃烧系统的第二燃烧器的结构示意图。
图6是本发明实施例的氨煤混合燃烧系统的混燃喷嘴的结构示意图。
图7是本公开实施例的氨煤混合燃烧系统的混燃喷嘴的结构示意图。
图8是图7中A-A处的剖视示意图。
附图标记：
燃料储罐装置1；液氨储罐11；液氨蒸发器12；出料口121；
燃烧锅炉2；锅炉段21；排气段22；排气口221；炉壁23；安装部231；燃烧组件24；架体241；第一燃烧器242；第一喷口2421；
第二燃烧器3；筒体31；第二喷口311；内层套管312；燃烧室3121；中层套管313；外层套管314；
点火装置32；点火器321；混燃喷嘴322；壳体3221；空腔3222；点火段32211；第一进气口32212；第二进气口32213；燃烧段32214；燃烧口32215；第一连接管3223；第二连接管3224；
供氨管路4；第一加热器41；
供气管路5；第二加热器51；
输送组件6；燃烧器支路61；第一支路62；第二支路63；第三支路64；第四支路65；
CSR反应器7。
分级风口8；
分隔屏9。
下面详细描述本公开的实施例，所述实施例的示例在附图中示出。下面通过参考附图描述的实施例是示例性的，旨在用于解释本公开，而不能理解为对本公开的限制。
如图1-图8所示，本公开实施例的氨煤混合燃烧系统包括：燃料储罐装置1、燃烧锅炉2、输送组件6和SCR反应器7。
燃料储罐装置1包括出料口121。燃烧锅炉2包括依次相连的锅炉段21和排气段22，排气段22包括排气口，排气口设在排气段22远离锅炉段21一侧，以便排出锅炉段21产生的气体。
如图1所示，燃料储罐装置1还包括液氨储罐11和液氨蒸发器12，液氨储罐11和液氨蒸发器12相连，以便将液氨储罐11中的氨由液态转化为气态，液氨蒸发器12的出口形成出料口121，以排出气化的氨气。排气段22位于锅炉段21的下游，即锅炉段21内燃烧产生的废气可以通过排气段22并从排气口排出。
输送组件6连通出料口121与燃烧锅炉2，以便将燃料储罐装置1中的燃料输送至燃烧锅炉2内，输送组件6包括燃烧器支路61和第一支路62、第二支路63、第三支路64、第四支路65，燃烧器支路61的出口与锅炉段21相连，第一支路62的出口与排气段22相连且邻近锅炉段21设置，第二支路63的出口与第三支路64的出口与排气段22相连且均位于第一支路62的出口的下游，以便在850℃-1100℃发生SNCR反应，第四支路65的出口与排气段22相连且邻近排气口设置。
SCR反应器7设在排气段22且位于第四支路65的出口与排气口之间。
如图1所示，燃烧支路的一端与出料口121相连，燃烧支路的另一端用于向锅炉段21通入氨气，第一支路62的一端与出料口121相连，第一支路62的另一端的出口设在排气段22内，以便向排气段22通入氨气，同理，第二支路63的一端与出料口121相连，第二支路63的另一端的出口设在排气段22内；第三支路64的一端与出料口121相连，第三支路64的另一端的出口设在排气段22内；第四支路65的一端与出料口121相连，第四支路65的另一端的出口设在排气段22内。
此外，如图1所示，燃烧锅炉2还包括分隔屏9和分级风口8，分级风口8设在排气段22，且位于第一支路62的出口和第二支路63的出口之间，分隔屏9设在第二支路63的出口和第三支路64的出口之间。
可以理解的是，锅炉段21燃烧后的烟气温度，会随着从排气段22排出的方向逐渐 降低，即邻近锅炉段21的烟气温度最高，则第一支路62出口处的温度、第二支路63出口处的温度、第三支路64出口处的温度、第四支路65出口处的温度逐渐降低。
需要说明的是，第二支路63的出口位于分隔屏9邻近锅炉段21的一侧，第三支路64的出口位于分隔屏9邻近第三支路64的出口一侧。
也就是说，本公开实施例的氨煤混合燃烧系统利用多个支路将氨气输送到燃烧锅炉2内，利用输送组件6向燃烧锅炉2的不同温度段通入氨气，可以将燃烧锅炉2燃烧后排出的废气中的一氧化氮还原成氮气，从而减少有害物质的排放。
因此，本公开实施例的氨煤混合燃烧系统能够实现氨气的梯级利用，降低有害气体的排放。
在一些实施例中，燃烧锅炉2包括多个侧壁围成的炉壁23和多个燃烧组件24，炉壁23包括安装部231，相连的两个侧壁之间形成安装部231，燃烧组件24有多个，多个燃烧组件24与多个安装部231一一对应，燃烧组件24设在安装部231上。
如图1和图2所示，例如切圆燃烧锅炉2为四角切圆燃烧锅炉2，则多个侧壁围成截面为正四边形，安装部231形成在正四边形的顶角。
如图所示，相连两个侧壁通过连接段相连，连接段位于切圆燃烧锅炉2的炉腔一侧形成安装部231。
在一些实施例中，燃烧组件24包括架体241、第一燃烧器242组和第二燃烧器3组，第一燃烧器242组包括多个第一燃烧器242，第一燃烧器242包括第一喷口2421，多个第一喷口2421设在架体241上沿架体241的高度方向间隔布置；第二燃烧器3组包括多个第二燃烧器3，第二燃烧器3包括第二喷口311，多个第二喷口311设在架体241上，多个第二喷口311中的至少一个位于第一燃烧器242组的一侧，多个第二喷口311中的至少一个位于第一燃烧器242组的另一侧。
如图3和图4所示，多个第一喷口2421设在架体241的中段，且多个第一喷口2421之间的间隙均匀设置，以使多个第一燃烧器242在使用时燃烧效果更佳均匀稳定。多个第二喷口311中的至少一个设在第一燃烧器242组的上方，且多个第二喷口311中的至少一个设在燃烧器组的下方。
如图3所示，多个第二喷口311中的两个设在第一燃烧器242组的上方，多个第二喷口311中的一个设在第一燃烧器242组的下方。
第一燃烧器242可以为直流燃烧器。
如图5所示，第二燃烧器3包括筒体31和点火装置32，筒体31具有燃烧室3121，筒体31的一端形成第二喷口311，点火装置32包括点火器321和混燃喷嘴322，混燃喷嘴322设在燃烧室3121内，混燃喷嘴322包括壳体3221，壳体3221具有空腔3222以及与空腔3222连通的第一进气口32212和第二进气口32213，第一进气口32212用于与氨气气源相连，第二进气口32213用于与空气气源相连，以使空气与氨气在空腔3222内混合形成混合气，点火器321与混燃喷嘴322相连，以便点燃所空腔3222内的混合气。第二燃烧器3还包括第一加热器41和第二加热器51，第一加热器41用于加热通入 第一进气口32212的氨气，第二加热器51用于加热通入第二进气口32213的空气。
可以理解的是，混燃喷嘴322在通过点火器321点燃之前，混燃喷嘴322的空腔3222内包括了加热后的氨气与空气的混合气，从而能够利用点火器321更方便的点燃该混合气。而筒体31的燃烧室3121内可以通入燃料或者燃料与空气的混合物，以便利用点然后的混合气点燃燃烧室3121内的燃料，进而提高本公开实施例的燃烧组件24的燃烧效果。
也就是说，本公开实施例的氨煤混合燃烧系统中的第二燃烧器3能够将氨气与空气在通入混燃喷嘴322前，分别进行了预热，可以降低点火能，便于点火，此外，由于混合预热具有一定的危险性，因此，本公开实施例的燃烧组件24能够将氨气与空气分别进行预热，提高了点火时的安全性。
需要说明的是，第二燃烧器3可以为氨煤燃烧器，即，本公开实施例的燃烧组件24安装在锅炉中使用时，由于煤粉的燃尽路径较长，因此，将两个第二燃烧器3设在第一燃烧器242组的上方，以保证煤粉的充分燃烧。此外，若锅炉为低负荷时，将一个第二燃烧器3设在第一燃烧器242组的下方，能够燃烧组件24有更好的稳燃效果。
在一些实施例中，第二燃烧器3还包括供氨管路4和供气管路5，供氨管路4的一端与氨气气源相连，供氨管路4的另一端通过第一进气口32212连通空腔3222，第一加热器41设在供氨管路4上，供气管路5的一端与空气气源相连，供气管路5的另一端通过第二进气口32213连通空腔3222相连，第二加热器51设在供气管路5上。
如图6-图7所示，供氨管路4的另一端与壳体3221相连，且供氨管路4的出口与混燃喷嘴322的空腔3222连通，以便可以将氨气通过第一进气口32212通入到混燃喷嘴322的空腔3222内，供气管路5的另一端与壳体3221相连，且供气管路5的出口与混燃喷嘴322的空腔3222连通，以便可以将空气通过第二进气口32213通入到混燃喷嘴322的空腔3222内。
可以理解的是，第一加热器41设在供氨管路4上，可以将供氨管路4上的氨气进行加热，再通过第一进气口32212将加热后的氨气通入到混燃喷嘴322的空腔3222，同理，第二加热器51设在供气管路5上，可以将供气管路5上的空气进行加热，再通过第二进气口32213将加热后的空气通入到混燃喷嘴322的空腔3222。避免了加热混合后的氨气与空气，以便保证本公开实施例的燃烧组件24的安全性。
在一些实施例中，壳体3221包括燃烧口32215和依次相连的点火段32211和燃烧段32214，点火段32211在混燃喷嘴322的高度方向位于燃烧段32214的下方，第一进气口32212和第二进气口32213均设在点火段32211上，燃烧口32215设在燃烧段32214远离点火段32211的一端，点火器321设在点火段32211。
如图6所示，燃烧段32214位于点火段32211的上方，氨气可以通过第一进气口32212进入点火段32211，空气可以通过第二进气口32213进入点火段32211。
可以理解的是，燃烧口32215设在燃烧段32214的上端，且远离第一进气口32212和第二进气口32213，因此进一步有利于氨气和空气的混合，氨气和空气混合后，可以 利用位于点火段32211的点火器321进行点燃混合气。
燃烧段32214的横截面积在由点火段32211指向燃烧段32214的方向上逐渐减小。如图所示，燃烧段32214的横截面积由下向上逐渐减小，也就是说，混燃喷嘴322的空腔3222内的混合气被点燃之后，由燃烧段32214下宽上窄的结构设置，可以是燃烧的火焰喷射的更远、更聚集。
在一些实施例中，混燃喷嘴322还包括第一连接管3223和第二连接管3224，第一连接管3223的一端与点火段32211相连，第一连接管3223的另一端形成第一进气口32212，第二连接管3224的一端与点火段32211相连，第二连接管3224的另一端形成第二进气口32213。
如图6所示，第一连接管3223的后端与点火段32211相连，第一连接管3223的前端开口形成第一进气口32212，第二连接管3224的前端与点火段32211相连，第二连接管3224的后端开口形成第二进气口32213。
可以理解的是，第一连接管3223连接在供氨管路4和混燃喷嘴322之间，方便供氨管路4的连接，即，第一连接管3223的开口形状可以根据供氨管道的氨气出口的形状的不同而改变，以适用不同形状的氨气出口，同理，第二连接管3224连接在供气管路5和混燃喷嘴322之间，方便供气管路5的连接。
在一些实施例中，点火段32211的横截面积沿混燃喷嘴322的高度方向恒定，第一连接管3223的轴线和/或第二连接管3224的轴线正交于点火段32211的轴线。
如图6和图7所示，点火段32211的横截面为圆形，即点火段32211为圆柱形。第一连接管3223的轴线正交于点火段32211的轴线；或者，第二连接管3224的轴线正交于点火段32211的轴线；或者，第一连接管3223的轴线和第二连接管3224的轴线均正交于点火段32211的轴线。
可以理解的是，点火段32211的轴线延伸方向与上下方向一致，则第一连接管3223的轴线和第二连接管3224的轴线中的至少一者的延伸方向正交于上下方向。
第一连接管3223的轴线与第二连接管3224的轴线平行，第一连接管3223的轴线与第二连接管3224的轴线之间具有间隙。可以理解的是，例如，如图所示，第一连接管3223的轴线延伸方向和第二连接管3224的轴线延伸方向与前后方向一致，且第一连接管3223的轴线与第二连接管3224的轴线在左右方向之间具有间隙。
也就是说，氨气与空气分别通过第一连接管3223和第二连接管3224进入混燃喷嘴322的空腔3222，气体进入混燃喷嘴322时，使气体的流向与点火段32211侧壁相切，从而使氨气与空气在混燃喷嘴322内呈环形混合，从而使混合更加充分，有利于混合气的点燃。
在一些实施例中，筒体31包括内层套管312、中层套管313和外层套管314，中层套管313套设在内层套管312外侧，外层套管314套设在中层套管313外侧，内层套管312的一端用于通入燃料，中层套管313的一端和外层套管314的一端均用于通入空气，内层套管312的另一端的内部形成燃烧室3121。
如图5所示，中层套管313套设在内层套管312上，且中层套管313左端的内壁面与内层套管312左端的外壁面之间具有间隙，外层套管314套设在中层套管313上，且外层套管314的内壁面与中层套管313的外壁面之间具有间隙。
可以理解的是，内层套管312用于将燃料或者燃料与空气的混合物通入燃烧室3121，以便可以利用混燃喷嘴322喷出的火焰点燃燃烧室3121内的燃料，中层套管313和外层套管314用于通入空气，以提供燃料燃烧所需的空气，进而保证燃烧效果。
在一些实施例中，中层套管313的另一端的端面位于内层套管312的另一端的端面和外层套管314的另一端的端面之间。
如图5所示，中层套管313的左端面位于内层套管312的左端面和外层套管314的左端面之间。
可以理解的是，内层套管312的左端内部的燃料被点燃之后，中层套管313的左端面和外层套管314的左端面均位于内层套管312的左端面的左侧，能够更好的为燃料燃烧提供所需的氧气，进而使本公开实施例的燃烧器的燃烧效果更好。
在本公开的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本公开的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本公开中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接或彼此可通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本公开中的具体含义。
在本公开中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
在本公开中，术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本公开的 至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
尽管已经示出和描述了上述实施例，可以理解的是，上述实施例是示例性的，不能理解为对本公开的限制，本领域普通技术人员对上述实施例进行的变化、修改、替换和变型均在本公开的保护范围内。
Claims (15)
- 一种氨煤混合燃烧系统，包括：燃料储罐装置，所述燃料储罐装置包括出料口；燃烧锅炉，所述燃烧锅炉包括依次相连的锅炉段和排气段，所述排气段包括排气口，所述排气口设在所述排气段远离所述锅炉段一侧，以便排出所述锅炉段产生的气体；输送组件，所述输送组件连通所述出料口与所述燃烧锅炉，用于将所述燃料储罐装置中的燃料输送至所述燃烧锅炉内；所述输送组件包括燃烧器支路和第一支路、第二支路、第三支路、第四支路；所述燃烧器支路的出口与所述锅炉段相连，所述第一支路的出口与所述排气段相连且邻近所述锅炉段设置，所述第二支路的出口与所述第三支路的出口与所述排气段相连且均位于所述第一支路的出口的下游，用于在850℃-1100℃发生SNCR反应，所述第四支路的出口与所述排气段相连且邻近所述排气口设置；SCR反应器，所述SCR反应器设在所述排气段且位于所述第四支路的出口与所述排气口之间。
- 根据权利要求1所述的氨煤混合燃烧系统，其中，所述燃料储罐装置还包括液氨储罐和液氨蒸发器，所述液氨储罐和所述液氨蒸发器相连，用于将所述液氨储罐中的氨由液态转化为气态，所述液氨蒸发器的出口形成出料口，用于排出气化的氨气；所述排气段位于所述锅炉段的下游。
- 根据权利要求1所述的氨煤混合燃烧系统，其中，所述燃烧支路的一端与所述出料口相连，所述燃烧支路的另一端用于向所述锅炉段通入氨气；所述第一支路的一端与所述出料口相连，所述第一支路的另一端的出口设在所述排气段内，用于向所述排气段通入氨气；所述第二支路的一端与所述出料口相连，所述第二支路的另一端的出口设在所述排气段内；所述第三支路的一端与所述出料口相连，所述第三支路的另一端的出口设在所述排气段内；所述第四支路的一端与所述出料口相连，所述第四支路的另一端的出口设在所述排气段内。
- 根据权利要求1所述的氨煤混合燃烧系统，其中，所述燃烧锅炉还包括分隔屏和分级风口，所述分级风口设在所述排气段，且位于所述第一支路的出口和所述第二支路的出口之间，所述分隔屏设在所述第二支路的出口和所述第三支路的出口之间。
- 根据权利要求1所述的氨煤混合燃烧系统，其中，所述燃烧锅炉包括多个侧壁围成的炉壁和多个燃烧组件，所述炉壁包括安装部，相连的两个所述侧壁之间形成所述安装部，所述燃烧组件有多个，多个所述燃烧组件与多个所述安装部一一对应，所述燃烧组件设在所述安装部上。
- 根据权利要求5所述的氨煤混合燃烧系统，其中，所述燃烧组件包括架体、第一燃烧器组和第二燃烧器组，所述第一燃烧器组包括多个第一燃烧器，所述第一燃烧器包括第一喷口，多个所述第一喷口设在所述架体上沿所述架体的高度方向间隔布置；所述第二燃烧器组包括多个第二燃烧器，所述第二燃烧器包括第二喷口，多个所述 第二喷口设在所述架体上，多个所述第二喷口中的至少一个位于所述第一燃烧器组的一侧，多个所述第二喷口中的至少一个位于所述第一燃烧器组的另一侧。
- 根据权利要求6所述的氨煤混合燃烧系统，其中，多个所述第一喷口设在所述架体的中段，且多个所述第一喷口之间的间隙均匀设置；多个所述第二喷口中的至少一个设在所述第一燃烧器组的上方，且多个所述第二喷口中的至少一个设在所述燃烧器组的下方。
- 根据权利要求6所述的氨煤混合燃烧系统，其中，所述第二燃烧器包括筒体和点火装置，所述筒体具有燃烧室，所述筒体的一端形成所述第二喷口，所述点火装置包括点火器和混燃喷嘴，所述混燃喷嘴设在所述燃烧室内，所述混燃喷嘴包括壳体，所述壳体具有空腔以及与所述空腔连通的第一进气口和第二进气口，所述第一进气口用于与氨气气源相连，所述第二进气口用于与空气气源相连，以使空气与氨气在所述空腔内混合形成混合气，所述点火器与所述混燃喷嘴相连，以便点燃所空腔内的混合气；所述第二燃烧器还包括第一加热器和第二加热器，所述第一加热器用于加热通入所述第一进气口的氨气，所述第二加热器用于加热通入所述第二进气口的空气。
- 根据权利要求8所述的氨煤混合燃烧系统，其中，所述第二燃烧器还包括供氨管路和供气管路，所述供氨管路的一端与所述氨气气源相连，所述供氨管路的另一端通过所述第一进气口连通所述空腔，所述第一加热器设在所述供氨管路上，所述供气管路的一端与所述空气气源相连，所述供气管路的另一端通过所述第二进气口连通所述空腔相连，所述第二加热器设在所述供气管路上。
- 根据权利要求9所述的氨煤混合燃烧系统，其中，所述壳体包括燃烧口和依次相连的点火段和燃烧段，所述点火段在所述混燃喷嘴的高度方向位于所述燃烧段的下方，所述第一进气口和所述第二进气口均设在所述点火段上，所述燃烧口设在所述燃烧段远离所述点火段的一端，所述点火器设在所述点火段，所述燃烧段的横截面积在由所述点火段指向所述燃烧段的方向上逐渐减小。
- 根据权利要求10所述的氨煤混合燃烧系统，其中，所述混燃喷嘴还包括第一连接管和第二连接管，所述第一连接管的一端与所述点火段相连，所述第一连接管的另一端形成所述第一进气口，所述第二连接管的一端与所述点火段相连，所述第二连接管的另一端形成所述第二进气口。
- 根据权利要求11所述的氨煤混合燃烧系统，其中，所述点火段的横截面积沿所述混燃喷嘴的高度方向恒定，所述第一连接管的轴线和/或所述第二连接管的轴线正交于所述点火段的轴线。
- 根据权利要求12所述的氨煤混合燃烧系统，其中，所述第一连接管的轴线与所述第二连接管的轴线平行，所述第一连接管的轴线与所述第二连接管的轴线之间具有间隙。
- 根据权利要求9所述的氨煤混合燃烧系统，其中，所述筒体包括内层套管、中 层套管和外层套管，所述中层套管套设在所述内层套管外侧，所述外层套管套设在所述中层套管外侧，所述内层套管的一端用于通入燃料，所述中层套管的一端和所述外层套管的一端均用于通入空气，所述内层套管包括管腔，所述管腔邻近所述内层套管的另一端形成所述燃烧室。
- 根据权利要求14所述的氨煤混合燃烧系统，其中，所述中层套管的另一端位于所述内层套管的另一端和所述外层套管的另一端之间。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211275223.X | 2022-10-18 | ||
| CN202211275223.XA CN115597062A (zh) | 2022-10-18 | 2022-10-18 | 一种氨煤混合燃烧系统 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024082443A1 true WO2024082443A1 (zh) | 2024-04-25 |
Family
ID=84849734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2022/142955 WO2024082443A1 (zh) | 2022-10-18 | 2022-12-28 | 一种氨煤混合燃烧系统 |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115597062A (zh) |
| WO (1) | WO2024082443A1 (zh) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109058979A (zh) * | 2018-08-13 | 2018-12-21 | 中国华能集团有限公司 | 旋风炉脱硝系统及方法 |
| CN209386281U (zh) * | 2018-08-29 | 2019-09-13 | 赫普科技发展（北京）有限公司 | 一种氨混配煤粉锅炉燃烧系统 |
| CN112879942A (zh) * | 2021-03-31 | 2021-06-01 | 西安热工研究院有限公司 | 一种混氨燃料火力发电系统及方法 |
| CN114110572A (zh) * | 2021-12-01 | 2022-03-01 | 青岛科技大学 | 超声协同控制的预热式氨燃烧方法及系统 |
| JP2022091595A (ja) * | 2020-12-09 | 2022-06-21 | 川崎重工業株式会社 | バーナ及びその制御方法、並びに、燃焼炉 |
-
2022
- 2022-10-18 CN CN202211275223.XA patent/CN115597062A/zh active Pending
- 2022-12-28 WO PCT/CN2022/142955 patent/WO2024082443A1/zh unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109058979A (zh) * | 2018-08-13 | 2018-12-21 | 中国华能集团有限公司 | 旋风炉脱硝系统及方法 |
| CN209386281U (zh) * | 2018-08-29 | 2019-09-13 | 赫普科技发展（北京）有限公司 | 一种氨混配煤粉锅炉燃烧系统 |
| JP2022091595A (ja) * | 2020-12-09 | 2022-06-21 | 川崎重工業株式会社 | バーナ及びその制御方法、並びに、燃焼炉 |
| CN112879942A (zh) * | 2021-03-31 | 2021-06-01 | 西安热工研究院有限公司 | 一种混氨燃料火力发电系统及方法 |
| CN114110572A (zh) * | 2021-12-01 | 2022-03-01 | 青岛科技大学 | 超声协同控制的预热式氨燃烧方法及系统 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115597062A (zh) | 2023-01-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104654306B (zh) | 一种低氮氧化物燃烧器 | |
| CN108027144A (zh) | 涡轮机的燃烧腔室，尤其是具有同流换热器的、用于产生电能的热力学循环涡轮机 | |
| KR100973414B1 (ko) | 예열이 필요없는 미분탄 연소방식의 석탄버너 | |
| WO2024082443A1 (zh) | 一种氨煤混合燃烧系统 | |
| CN104132343A (zh) | 一种辐射管燃烧器 | |
| CN217302790U (zh) | 一种氨氢混合燃烧器 | |
| CN104583677B (zh) | 用于操作液体燃料催化燃烧的催化加热器和反应器中的燃料喷射系统 | |
| US10955131B2 (en) | System and method for providing combustion in a boiler | |
| CN215411868U (zh) | 旋流烟气再循环燃气燃烧器 | |
| CN211925749U (zh) | 一种蓄热式燃烧器 | |
| JP2020003185A (ja) | ガス燃焼装置および真空式温水機 | |
| CN114811582A (zh) | 一种双旋流低氮燃烧器 | |
| CN107420890A (zh) | 一种醇基燃料汽化燃烧装置 | |
| CN210069874U (zh) | 烟气加热系统 | |
| CN203385195U (zh) | 一种可混合冷风的多孔介质烟气热风炉 | |
| CN103115360A (zh) | 燃气短火焰高温工业燃烧器 | |
| CN113108283B (zh) | 气体燃料部分预混低氮燃烧器 | |
| CN212691749U (zh) | 水煤浆燃烧器 | |
| CN203116019U (zh) | 燃气短火焰高温工业燃烧器 | |
| CN211060090U (zh) | 一种基于现有室燃锅炉改造的可燃烧生物质燃料的锅炉 | |
| CN216925165U (zh) | 一种梭式窑天然气纯氧烧嘴和梭式窑 | |
| US4063872A (en) | Universal burner | |
| CN214275718U (zh) | 一种适用于中小型燃气锅炉的低氮燃烧装置 | |
| CN214840798U (zh) | 气体燃料的部分预混燃烧装置 | |
| WO2023204102A1 (ja) | 粉状燃料バーナ |