CN116734250A - Gradually-expanding combustion chamber and hydrogen-burning gas boiler with same - Google Patents
Gradually-expanding combustion chamber and hydrogen-burning gas boiler with same Download PDFInfo
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- CN116734250A CN116734250A CN202310695369.8A CN202310695369A CN116734250A CN 116734250 A CN116734250 A CN 116734250A CN 202310695369 A CN202310695369 A CN 202310695369A CN 116734250 A CN116734250 A CN 116734250A
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- cooled wall
- heat exchange
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 87
- 239000007789 gas Substances 0.000 claims abstract description 58
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 238000009792 diffusion process Methods 0.000 claims abstract description 16
- 230000005855 radiation Effects 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 75
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 19
- 239000003546 flue gas Substances 0.000 claims description 19
- 238000001816 cooling Methods 0.000 abstract description 30
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 15
- 239000001257 hydrogen Substances 0.000 abstract description 10
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 10
- 230000008021 deposition Effects 0.000 abstract description 3
- 238000010992 reflux Methods 0.000 abstract description 3
- 230000008093 supporting effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 8
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- 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
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/78—Cooling burner parts
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a gradually-expanding combustion chamber and a hydrogen-burning gas boiler with the same, wherein the combustion space of the combustion chamber comprises a diffusion combustion chamber formed by a front water-cooling wall and a side water-cooling wall of a hearth, a pressure-stabilizing combustion chamber formed by a sealing plate and the side water-cooling wall, and a back water-cooling wall and the side water-cooling wall of the hearth which are sequentially communicated form a back-burning combustion chamber; the direction from the inlet to the pressure-stabilizing combustion chamber of the diffusion combustion chamber is gradually expanded, the tail end of the backfire combustion chamber is provided with an air outlet, and the air outlet is connected with a radiation backflow screen. The gas boiler based on the combustion chamber achieves the heat exchange and supporting effects through the connection of the circulating pipeline. The design of the combustion chamber and the radiation reflux screen can enable flame to achieve the effect of stable combustion, reduce the temperature of a hearth, reduce the generation of nitrogen oxides, solve the problem of deposition of hydrogen in the hearth, enable the combustion to be full, improve the thermal efficiency of a boiler and meet the new requirements of energy conservation and environmental protection.
Description
Technical Field
The invention relates to the technical field of combustion and heat exchange systems, in particular to a divergent combustion chamber and a hydrogen-burning gas boiler with the divergent combustion chamber.
Background
As is well known, fossil fuels as a main source of energy are rapidly reduced and pollution is serious with the increasing demands of society for energy. Therefore, finding an alternative energy source is a focus of general social concern. Natural gas and hydrogen in clean energy are important available energy, and the energy has the characteristics of green, low carbon, cleanness, reproducibility and the like, and the development and the utilization of combustible gas energy are accelerated.
However, the existing combustion furnace generally has the problems of unstable combustion of a hearth, insufficient combustion, high temperature of a flue gas outlet, high emission concentration of nitrogen oxides and the like in the combustion process of clean fuels such as natural gas, hydrogen and the like, and the density of the hydrogen in the clean fuel is small, so that the hydrogen energy fuel boiler is easy to deposit in the hearth in the combustion process, and the thermal efficiency is low.
Therefore, in view of the above problems, how to provide a combustion furnace that improves thermal efficiency is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a divergent combustion chamber and a hydrogen-burning gas boiler with the divergent combustion chamber, wherein the structural design of the combustion chamber can greatly reduce the temperature of a hearth, realize low-nitrogen combustion, reduce the emission of nitrogen oxides, and further improve the thermal efficiency of the boiler. Meanwhile, the problem that the hydrogen is light in weight, small in density and easy to deposit in a hearth is solved. The gas boiler based on the combustion chamber is internally provided with the high-strength supporting pipeline structure, is safe and stable, does not need additional steel frame support, and has small occupied area, compact structure and less steel consumption.
In order to achieve the above purpose, the invention adopts the following technical scheme:
firstly, the invention provides a gradually-expanding combustion chamber, which comprises a diffusion combustion chamber, a pressure-stabilizing combustion chamber and a backfire burnout chamber which are sequentially communicated;
the diffusion combustion chamber is provided with an inlet, the inlet of the diffusion combustion chamber is used for being connected with a combustor, and the back-combustion burnout chamber is provided with an air outlet;
the diffusion combustion chamber is gradually expanded from an inlet to the pressure-stabilizing combustion chamber, an air outlet is formed in the tail end of the backfire burnout chamber, and a radiation backflow screen is connected to the air outlet.
Preferably, the combustion chamber is a combustion space formed by connecting a front water-cooling wall of a furnace, a sealing plate, a rear water-cooling wall of the furnace and a side water-cooling wall, the front water-cooling wall of the furnace and the side water-cooling wall form a diffusion combustion chamber, the sealing plate and the side water-cooling wall form a pressure-stabilizing combustion chamber, and the rear water-cooling wall of the furnace and the side water-cooling wall form a back-combustion burnout chamber.
Furthermore, the two ends of the front water-cooling wall of the hearth are communicated with an upper header of the front water-cooling wall of the hearth and a lower header of the front water-cooling wall of the hearth, the two ends of the rear water-cooling wall of the hearth are communicated with an upper header of the rear water-cooling wall of the hearth and a lower header of the rear water-cooling wall of the hearth, and the two ends of the side water-cooling wall are communicated with an upper header of the side water-cooling wall and a lower header of the side water-cooling wall.
In addition, the invention also provides a gradually-expanding type combustor hydrogen-burning gas boiler, which comprises the combustor structure in the further technical scheme, and further comprises: a boiler barrel, a flue gas outlet and a convection heat exchange tube;
a water inlet is formed in the boiler barrel;
the boiler barrel is communicated with the front water-cooled wall upper header of the hearth, the front water-cooled wall lower header of the hearth, the rear water-cooled wall upper header of the hearth, the rear water-cooled wall lower header of the hearth, the side water-cooled wall upper header, the side water-cooled wall lower header and the convection heat exchange tube;
the flue gas outlet is communicated with the air outlet through an outlet sealing plate, and the convection heat exchange tube is wrapped on the outer wall of the outlet sealing plate.
Preferably, the gas boiler further comprises a gas collecting pipe;
the other end of the first section of seal is communicated with the boiler barrel;
the front water-cooled wall upper header, the rear water-cooled wall upper header, the side water-cooled wall upper header and the convection heat exchange tube are all communicated with the gas collecting tube.
Preferably, the gas boiler further comprises a front descending pipe and a rear descending pipe, wherein two ends of the front descending pipe are respectively communicated with the boiler barrel and the side water-cooled wall lower header, and two ends of the rear descending pipe are respectively communicated with the side water-cooled wall upper header and the side water-cooled wall lower header.
Further, the convection heat exchange tube comprises an upper convection heat exchange tube header and a lower convection heat exchange tube header, wherein the lower convection heat exchange tube header is communicated with the rear descending tube, and the upper convection heat exchange tube header is respectively communicated with the upper side water cooling wall header and the gas collecting tube.
Preferably, the convection heat exchange tube comprises a lower drum, and two ends of the convection heat exchange tube are respectively communicated with the drum and the lower drum to form a circulation loop.
Preferably, the gas boiler further comprises a water supply header and a return water header, wherein the water supply header is communicated with the boiler barrel and the side water cooling wall lower header, and the return water header is communicated with the boiler barrel and the side water cooling wall upper header.
Preferably, the gas boiler further comprises a first descending pipe and a second descending pipe, two ends of the first descending pipe are respectively communicated with the boiler barrel and the front water-cooled wall lower header of the hearth, and two ends of the second descending pipe are respectively communicated with the boiler barrel and the rear water-cooled wall lower header of the hearth.
Preferably, the gas boiler further comprises a water supply pipe;
one end of the water supply pipe is communicated with the boiler barrel, and the other end of the water supply pipe is communicated with the water inlet end of the convection heat exchange pipe.
Further, the convection heat exchange tube comprises an upper convection heat exchange tube header and a lower convection heat exchange tube header, the lower heat exchange tube header is communicated with the rear descending tube, and the upper convection heat exchange tube header is communicated with a water outlet header.
In the above technical solution, the convection heat exchange tube is a serpentine convection heat exchange tube or a linear convection heat exchange tube.
Compared with the prior art, the invention discloses a divergent combustion chamber and a hydrogen-burning gas boiler with the divergent combustion chamber, which have the following beneficial effects:
the design of the gradually-expanding combustion chamber and the radiation backflow screen can enable flame to achieve the effect of stable combustion, and greatly reduce the temperature of a hearth, so that the generation of nitrogen oxides is reduced, the problem of deposition of hydrogen in the hearth can be solved, the combustion is complete, the thermal efficiency of a boiler is improved, and the new energy-saving and environment-friendly requirements are met.
The gas boiler based on the combustion chamber adopts a pipeline structure with a supporting function to circulate, so that the heat exchange efficiency is improved, the steel consumption is saved, and the cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a diagram of the structure of a divergent combustor of example 1 of the present invention;
FIG. 2 is a gradually expanding type combustor hydrogen-fired gas boiler according to embodiment 2 of the present invention;
FIG. 3 is a gradually expanding type combustor hydrogen-fired gas boiler according to embodiment 3 of the present invention;
FIG. 4 is a gradually expanding type combustor hydrogen-fired gas boiler of example 4 of the present invention;
FIG. 5 is a gradually expanding type combustor hydrogen-fired gas boiler according to embodiment 5 of the present invention;
FIG. 6 is a side view of a divergent-type combustor hydrogen-fired gas boiler of example 6 of the present invention;
FIG. 7 is a gradually expanding type combustor hydrogen-fired gas boiler according to example 7 of the present invention.
In the figure, the lower header of the 1-side water-cooled wall, the 2-front downcomer, the 3-front water-cooled wall of the furnace, the 4-burner, the 5-flame, the 6-drum, the upper header of the 7-side water-cooled wall, the 8-side water-cooled wall, the 9-diffusion combustion chamber, the 10-connecting pipe III, the 11-front water-cooled wall upper header of the furnace, the 12-rear water-cooled wall upper header of the furnace, the 13-rear water-cooled wall of the furnace, the 14-connecting pipe I, the 15-upper header of the convection heat exchange tube, the 16-collecting tube, the 17-connecting pipe II, the 18-rear downcomer, the 19-air outlet, the 20, the flue gas outlet, the 21-convection heat exchange tube, the 22-lower header of the convection heat exchange tube, the 23-radiation reflux screen, the 24-afterburning chamber, the lower header of the 25-rear water-cooled wall of the furnace, the 26-downcomer II, the 27, the steady-pressure combustion chamber, the 28, the sealing plate, the 29-first downcomer, the 30-front water-cooled wall lower header of the 31-steam outlet, the 32-water inlet, the 33-backwater header, the 34-water supply header, the 35-water supply header, the water-supply header, the 36-water-supply header, the first-water-supply tube, the 37-water-return tube, the 37-water-outlet, the 37-backwater tube, the 37-outlet 39-outlet of the lower water-40.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1, a divergent combustion chamber in the technical scheme of the present invention is a combustion space formed by connecting a front water-cooled wall 3 of a furnace, a sealing plate 28, a rear water-cooled wall 13 of the furnace and a side water-cooled wall 8, wherein two ends of the front water-cooled wall 3 of the furnace are communicated with an upper header 11 of the front water-cooled wall of the furnace and a lower header 30 of the front water-cooled wall of the furnace, two ends of the rear water-cooled wall 13 of the furnace are communicated with an upper header 12 of the rear water-cooled wall of the furnace and a lower header 25 of the rear water-cooled wall of the furnace, and two ends of the side water-cooled wall 8 are communicated with an upper header 7 of the side water-cooled wall and a lower header 1 of the side water-cooled wall, wherein the side water-cooled wall 8 comprises left and right side water-cooled walls.
The combustion space comprises a diffusion combustion chamber 9 formed by a front water-cooling wall 3 and a side water-cooling wall 8 of the hearth, a pressure-stabilizing combustion chamber 27 formed by a sealing plate 28 and the side water-cooling wall 8, and a back-combustion burnout chamber 24 formed by a rear water-cooling wall 13 and the side water-cooling wall 8 of the hearth, which are sequentially communicated; the direction from the inlet to the pressure stabilizing combustion chamber 27 of the diffusion combustion chamber 9 is gradually expanded, and the diffusion combustion chamber can be set into any gradually expanded shape according to the requirements; the inlet of the diffusion combustion chamber 9 is connected with a burner 4; the tail end of the backfire burnout chamber 24 is provided with an air outlet 19, and a radiation backflow screen is connected to the air outlet 19.
When the burner is used, the hydrogen or the premixed gas is used as fuel to be sprayed into a divergent combustion chamber through a nozzle of the burner 4, the burner is ignited and burned through an ignition device, the state of flame 5 after the burner is ignited is shown as shown in fig. 1, heat generated by combustion is absorbed by a front water-cooled wall 3 of a hearth, left and right side water-cooled walls 8, high-temperature flue gas and high-temperature flame generated at the same time flow backwards to a backfire combustion chamber while being burned, part of flue gas is re-baffled to the backfire combustion area under the action of a radiation backflow screen 23, and part of flue gas flows out through an air outlet 19. The design of the gradually-expanding combustion chamber enables the combustible gas to increase along with the increase of the sectional area of the expanding combustion chamber and reduce the flow speed in the entering process, so that the pressure of the combustion chamber is increased, the combustion is more stable and more sufficient, and the thermal efficiency of the boiler is further improved; the radiation reflux screen 23 can reduce the generation of nitrogen oxides, so that the combustion is more sufficient, and the thermal efficiency of the boiler is improved; the boiler structural design simplifies the flue gas flow into a linear type, is not easy to produce flue gas deposition, and solves the problems that when hydrogen is used as combustible gas, the hydrogen has light weight and small density and is easy to deposit in a hearth.
The following gas boilers are provided based on the above-described gradually expanding combustion chamber, but the gas boiler structure based on the combustion chamber is not limited thereto.
Example 2
As shown in fig. 2, the gradually-expanding type combustor hydrogen-burning gas boiler comprises the gradually-expanding type combustor in the scheme of the embodiment 1, and further comprises: a boiler barrel 6, a flue gas outlet 20 and a convection heat exchange tube 21;
the boiler barrel 6 is provided with a water inlet 32 and is also communicated with a gas collecting pipe 16;
the boiler barrel 6 is communicated with the side water-cooled wall upper header 7, and the front water-cooled wall upper header 11 of the hearth and the rear water-cooled wall upper header 12 of the hearth are communicated with the side water-cooled wall upper header 7, namely the front water-cooled wall upper header 11 of the hearth and the rear water-cooled wall upper header 12 of the hearth are communicated with the boiler barrel 6 through the side water-cooled wall upper header 7;
the boiler barrel 6 is communicated with a front downcomer 2, the other end of the front downcomer 2 is communicated with a side water-cooled wall lower header 1, a side water-cooled wall upper header 7 is communicated with a rear downcomer 18, and the other end of the rear downcomer 18 is communicated with the side water-cooled wall lower header 1;
the lower header 30 of the front water-cooled wall of the hearth is communicated with the boiler barrel 6 through a first descending pipe 29, and the lower header 25 of the rear water-cooled wall of the hearth is communicated with the boiler barrel 6 through a second descending pipe 26;
the convection heat exchange tube 21 adopts a serpentine convection heat exchange tube and comprises a convection heat exchange tube upper header 15 and a convection heat exchange tube lower header 22, wherein the convection heat exchange tube lower header 22 is communicated with the rear downcomer 18;
the air outlet 19 is communicated with the flue gas outlet 20 through an outlet sealing plate 38 to form a horizontal air outlet structure, and the convection heat exchange tube 21 is wound and wrapped on the surface of an air outlet channel formed by the outlet sealing plate 38;
the front water-cooled wall upper header 11 of the hearth, the rear water-cooled wall upper header 12 of the hearth and the convection heat exchange tube upper header 15 are all communicated with the side water-cooled wall upper header 7 through a connecting pipe III 10 and are all communicated with a gas collecting tube 16 through a connecting pipe I14.
The operation and circulation principle of the device are as follows:
boiler feed water enters a water space of the boiler barrel 6 from a water inlet 32, flows downwards through a front downcomer 2, a first downcomer 29, a second downcomer 26, a side water-cooled wall upper header 7 and a rear downcomer 18, enters a side water-cooled wall lower header 1, a front water-cooled wall lower header 30 of a hearth, a rear water-cooled wall lower header 25 of the hearth and a convection heat exchange tube lower header 22, and enters a side water-cooled wall 8, a front water-cooled wall 3 of the hearth and a rear water-cooled wall 13 of the hearth upwards, steam is generated in a heating surface by radiation heat exchange and convection heat exchange water in the convection heat exchange tube 21 and flows upwards, and the generated steam is finally collected in a steam space at the upper part of the side water-cooled wall upper header 7 and a gas collecting tube 16 through various pipelines and is finally discharged from a steam outlet 31 on the boiler barrel 6; and the water which is not gasified and evaporated is finally collected in the lower water space of the header 7 on the side water wall through the connection relation of the pipelines to be redistributed into the next cycle, thus completing the circulating heat exchange function.
Example 3
As shown in fig. 3, the difference from embodiment 2 is that the position of the drum 6 is changed. The principle of operation is the same as that of the boiler of example 2.
Example 4
As shown in fig. 4, the difference from embodiment 2 is that the gas outlet 19 is connected to the gas outlet 20 through the outlet sealing plate 38, so as to form a vertical gas outlet structure with upward gas outlet. The principle of operation is the same as that of the boiler of example 2.
Example 5
As shown in fig. 5, the gradually expanding type combustor hydrogen-burning gas boiler comprises the gradually expanding type combustor in the scheme of the embodiment 1, and further comprises: a boiler barrel 6, a flue gas outlet 20 and a convection heat exchange tube 21;
the boiler barrel 6 is provided with a water inlet 32 and is also communicated with a water supply pipe 35;
the boiler barrel 6 is communicated with the side water-cooled wall upper header 7, the boiler barrel 6 is communicated with the front water-cooled wall upper header 11 of the hearth through a first return pipe 36, and is communicated with the rear water-cooled wall upper header 12 of the hearth through a second return pipe 37;
the boiler barrel 6 is communicated with a front downcomer 2, the other end of the front downcomer 2 is communicated with a side water-cooled wall lower header 1, a side water-cooled wall upper header 7 is communicated with a rear downcomer 18, and the other end of the rear downcomer 18 is communicated with the side water-cooled wall lower header 1;
the lower header 30 of the front water-cooled wall of the hearth is communicated with the boiler barrel 6 through a first descending pipe 29, and the lower header 25 of the rear water-cooled wall of the hearth is communicated with the boiler barrel 6 through a second descending pipe 26;
the convection heat exchange tube 21 adopts a serpentine convection heat exchange tube and comprises a convection heat exchange tube upper header 15 and a convection heat exchange tube lower header 22, wherein the convection heat exchange tube lower header 22 is communicated with a water supply tube 35, and the convection heat exchange tube upper header 15 is communicated with a water outlet header 39 through a connecting tube II 17;
the air outlet 19 is communicated with the flue gas outlet 20 through an outlet sealing plate 38 to form a horizontal air outlet structure, and the convection heat exchange tube 21 is wound and wrapped on the surface of an air outlet channel formed by the outlet sealing plate 38;
the operation and circulation principle of the device are as follows:
boiler feed water enters the water space of the boiler barrel 6 from the water inlet 32, flows downwards through the front downcomer 2, the first downcomer 29, the second downcomer 26, the side water-cooled wall upper header 7 and the rear downcomer 18, enters the side water-cooled wall lower header 1, the front water-cooled wall lower header 30 of the hearth and the rear water-cooled wall lower header 25 of the hearth, water upwards enters the side water-cooled wall 8, the front water-cooled wall 3 of the hearth and the rear water-cooled wall 13 of the hearth, and the water subjected to radiation heat exchange and convection heat exchange returns to the boiler barrel 6 through the first return pipe 36, the second return pipe 37 and the side water-cooled wall upper header 7, then enters the convection heat exchange tube lower header 22 through the feed pipe 35 communicated with the boiler barrel 6, further enters the convection heat exchange tube 21 for heat exchange, and the hot water subjected to heat exchange enters the convection heat exchange tube upper header 15, and finally is discharged into the hot water outlet header 39 through the connecting pipe II17 to complete the circulating heat exchange work.
Example 6
As shown in fig. 6, the gradually expanding type combustor hydrogen-burning gas boiler comprises the gradually expanding type combustor in the scheme of the embodiment 1, and further comprises: a boiler barrel 6, a flue gas outlet 20 and a convection heat exchange tube 21;
the boiler barrel 6 is provided with a water inlet 32 and is also communicated with a gas collecting pipe 16;
the boiler barrel 6 is communicated with the side water-cooled wall upper header 7 through a backwater header 33, and the front water-cooled wall upper header 11 of the hearth and the rear water-cooled wall upper header 12 of the hearth are communicated with the side water-cooled wall upper header 7, namely the front water-cooled wall upper header 11 of the hearth and the rear water-cooled wall upper header 12 of the hearth are communicated with the boiler barrel 6 through the side water-cooled wall upper header 7;
the boiler barrel 6 is communicated with a front downcomer 2, the other end of the front downcomer 2 is communicated with a water supply header 34, the water supply header 34 is communicated with a side water-cooled wall lower header 1, a side water-cooled wall upper header 7 is communicated with a rear downcomer 18, and the other end of the rear downcomer 18 is communicated with the side water-cooled wall lower header 1;
the lower header 30 of the front water-cooled wall of the hearth is communicated with the boiler barrel 6 through a first descending pipe 29, and the lower header 25 of the rear water-cooled wall of the hearth is communicated with the boiler barrel 6 through a second descending pipe 26;
the convection heat exchange tube 21 adopts a serpentine convection heat exchange tube and comprises a convection heat exchange tube upper header 15 and a convection heat exchange tube lower header 22, wherein the convection heat exchange tube lower header 22 is communicated with the rear downcomer 18;
the air outlet 19 is communicated with the flue gas outlet 20 through an outlet sealing plate 38 to form a horizontal air outlet structure, and the convection heat exchange tube 21 is wound and wrapped on the surface of an air outlet channel formed by the outlet sealing plate 38;
the front water-cooled wall upper header 11 of the hearth, the rear water-cooled wall upper header 12 of the hearth and the convection heat exchange tube upper header 15 are all communicated with the side water-cooled wall upper header 7 through a connecting pipe III 10 and are all communicated with a gas collecting tube 16 through a connecting pipe I14.
The operation and circulation principle of the device are as follows:
boiler feed water enters a water space of the boiler barrel 6 from a water inlet 32, flows downwards through a front downcomer 2, a first downcomer 29, a second downcomer 26, a side water-cooled wall upper header 7 and a rear downcomer 18, enters a water supply header 34 and then enters a side water-cooled wall lower header 1, a front water-cooled wall lower header 30 of a hearth, a rear water-cooled wall lower header 25 of the hearth and a convection serpentine tube bundle lower header 22, water upwards enters the side water-cooled wall 8, the front water-cooled wall 3 of the hearth and the rear water-cooled wall 13 of the hearth, steam is generated in a heating surface by radiation heat exchange and convection heat exchange water and flows upwards, and the generated steam finally is collected in a steam space at the upper part of the side water-cooled wall upper header 7 and a gas collecting tube 16 through various pipelines and is finally discharged from a steam outlet 31 on the boiler barrel 6; and the water which is not gasified and evaporated finally gathers in the lower water space of the upper header 7 of the side water wall through the connection relation of the pipelines, and then enters the backwater header 33 for being redistributed to enter the next cycle, thus completing the circulating heat exchange function.
Example 7
As shown in fig. 7, the gradually expanding type combustor hydrogen-burning gas boiler comprises the gradually expanding type combustor in the scheme of the embodiment 1, and further comprises: a boiler barrel 6, a flue gas outlet 20 and a convection heat exchange tube 21;
the boiler barrel 6 is provided with a water inlet 32 and is also communicated with a gas collecting pipe 16;
the boiler barrel 6 is communicated with the side water-cooled wall upper header 7, and the front water-cooled wall upper header 11 of the hearth and the rear water-cooled wall upper header 12 of the hearth are communicated with the side water-cooled wall upper header 7, namely the front water-cooled wall upper header 11 of the hearth and the rear water-cooled wall upper header 12 of the hearth are communicated with the boiler barrel 6 through the side water-cooled wall upper header 7;
the boiler barrel 6 is communicated with a front downcomer 2, the other end of the front downcomer 2 is communicated with a side water-cooled wall lower header 1, a side water-cooled wall upper header 7 is communicated with a rear downcomer 18, and the other end of the rear downcomer 18 is communicated with the side water-cooled wall lower header 1;
the lower header 30 of the front water-cooled wall of the hearth is communicated with the boiler barrel 6 through a first descending pipe 29, and the lower header 25 of the rear water-cooled wall of the hearth is communicated with the boiler barrel 6 through a second descending pipe 26;
the convection heat exchange tube 21 adopts a linear convection heat exchange tube and comprises a lower drum 40, two ends of the convection heat exchange tube 21 are respectively communicated with the drum 6 and the lower drum 40, and the three make the convection heat exchange tube form a circulating pipeline;
the air outlet 19 is communicated with the flue gas outlet 20 through an outlet sealing plate 38 to form a horizontal air outlet structure, and the convection heat exchange tube 21 is wound and wrapped on the surface of an air outlet channel formed by the outlet sealing plate 38;
the front water-cooled wall upper header 11 of the hearth and the rear water-cooled wall upper header 12 of the hearth are communicated with the side water-cooled wall upper header 7 through a connecting pipe III 10 and are communicated with a gas collecting pipe 16 through a connecting pipe I14.
The operation and circulation principle of the device are as follows:
boiler feed water enters a water space of the boiler barrel 6 from a water inlet 32, flows downwards through a front downcomer 2, a first downcomer 29, a second downcomer 26, a side water-cooled wall upper header 7 and a rear downcomer 18, enters a side water-cooled wall lower header 1, a front water-cooled wall lower header 30 of a hearth and a rear water-cooled wall lower header 25 of the hearth, water upwards enters a side water-cooled wall 8, a front water-cooled wall 3 of the hearth and a rear water-cooled wall 13 of the hearth, water in the boiler barrel 6 downwards flows into a convection heat exchange tube 21 and then enters a lower boiler barrel 40, steam is generated in a heated surface through radiation heat exchange and convection heat exchange, flows upwards, and the generated steam finally is collected in a steam space at the upper part of the side water-cooled wall upper header 7 and a gas collecting tube 16 through various pipelines and is finally discharged through a steam outlet 31 on the boiler barrel 6; and the water which is not gasified and evaporated is finally collected in the lower water space of the header 7 on the side water wall through the connection relation of the pipelines to be redistributed into the next cycle, thus completing the circulating heat exchange function.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (12)
1. The gradually-expanding combustion chamber is characterized by comprising a diffusion combustion chamber, a pressure-stabilizing combustion chamber and a backfire burnout chamber which are sequentially communicated;
the diffusion combustion chamber is provided with an inlet, and the back-combustion burnout chamber is provided with an air outlet;
the diffusion combustion chamber is gradually expanded from an inlet to the pressure-stabilizing combustion chamber, an air outlet is formed in the tail end of the backfire burnout chamber, and a radiation backflow screen is connected to the air outlet.
2. The divergent combustion chamber of claim 1, wherein the combustion chamber is a combustion space formed by connecting a front water-cooled wall of a furnace, a sealing plate, a rear water-cooled wall of the furnace and a side water-cooled wall, wherein the front water-cooled wall of the furnace and the side water-cooled wall form a diffusion combustion chamber, the sealing plate and the side water-cooled wall form a pressure-stabilizing combustion chamber, and the rear water-cooled wall of the furnace and the side water-cooled wall form a back-combustion burnout chamber.
3. A divergent combustion chamber as claimed in claim 2 wherein the front furnace water wall has two ends communicating with the front furnace water wall upper header and the front furnace water wall lower header, the rear furnace water wall has two ends communicating with the rear furnace water wall upper header and the rear furnace water wall lower header, and the side water wall has two ends communicating with the side water wall upper header and the side water wall lower header.
4. A divergent-type combustor hydrogen-fired gas boiler comprising the combustor of claim 3, further comprising: a boiler barrel, a flue gas outlet and a convection heat exchange tube;
a water inlet is formed in the boiler barrel;
the boiler barrel is communicated with the front water-cooled wall upper header of the hearth, the front water-cooled wall lower header of the hearth, the rear water-cooled wall upper header of the hearth, the rear water-cooled wall lower header of the hearth, the side water-cooled wall upper header, the side water-cooled wall lower header and the convection heat exchange tube;
the flue gas outlet is communicated with the air outlet through an outlet sealing plate, and the convection heat exchange tube is wrapped on the outer wall of the outlet sealing plate.
5. The diverging combustion chamber hydrogen-fired gas boiler of claim 4, further comprising a gas header;
the other end of the first section of seal is communicated with the boiler barrel;
the front water-cooled wall upper header, the rear water-cooled wall upper header, the side water-cooled wall upper header and the convection heat exchange tube are all communicated with the gas collecting tube.
6. The divergent-type combustor hydrogen-fired gas boiler of claim 4, further comprising a front downcomer and a rear downcomer, wherein two ends of the front downcomer are respectively communicated with the drum and the lower side-wall header, and two ends of the rear downcomer are respectively communicated with the upper side-wall header and the lower side-wall header.
7. The divergent-type combustor hydrogen-fired gas boiler of claim 6, wherein the convection heat exchange tube comprises an upper convection heat exchange tube header and a lower convection heat exchange tube header, the lower convection heat exchange tube header being in communication with the rear downcomer, the upper convection heat exchange tube header being in communication with the upper side water-cooled wall header and the gas header, respectively.
8. The gradually expanding combustor hydrogen-fired gas boiler according to claim 4, wherein the convection heat exchange tube comprises a lower drum, and two ends of the convection heat exchange tube are respectively communicated with the drum and the lower drum to form a circulation loop.
9. The gradually expanding combustor hydrogen-fired gas boiler of claim 4, further comprising a water supply header and a return header, wherein the water supply header communicates with the drum and the side water cooled wall lower header, and the return header communicates with the drum and the side water cooled wall upper header.
10. A divergent-type combustor hydrogen-fired gas boiler as claimed in any one of claims 4 to 9 and further comprising a first down pipe and a second back down pipe, wherein two ends of the first down pipe are respectively communicated with the boiler barrel and the front water-cooled wall lower header of the furnace, and two ends of the second down pipe are respectively communicated with the boiler barrel and the back water-cooled wall lower header of the furnace.
11. The diverging combustion chamber hydrogen-fired gas boiler of claim 4, further comprising a feed water pipe;
one end of the water supply pipe is communicated with the boiler barrel, and the other end of the water supply pipe is communicated with the water inlet end of the convection heat exchange pipe.
12. The divergent-type combustor hydrogen-fired gas boiler of claim 11, wherein the convection heat exchange tube comprises an upper convection heat exchange tube header and a lower convection heat exchange tube header, the lower heat exchange tube header being in communication with the rear downcomer, the upper heat exchange tube header being in communication with a water outlet header.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310695369.8A CN116734250A (en) | 2023-06-13 | 2023-06-13 | Gradually-expanding combustion chamber and hydrogen-burning gas boiler with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310695369.8A CN116734250A (en) | 2023-06-13 | 2023-06-13 | Gradually-expanding combustion chamber and hydrogen-burning gas boiler with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116734250A true CN116734250A (en) | 2023-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310695369.8A Pending CN116734250A (en) | 2023-06-13 | 2023-06-13 | Gradually-expanding combustion chamber and hydrogen-burning gas boiler with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116734250A (en) |
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2023
- 2023-06-13 CN CN202310695369.8A patent/CN116734250A/en active Pending
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