CN213207849U - Novel pure NH3 combustor based on fuel is preheated - Google Patents
Novel pure NH3 combustor based on fuel is preheated Download PDFInfo
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- CN213207849U CN213207849U CN202021138369.6U CN202021138369U CN213207849U CN 213207849 U CN213207849 U CN 213207849U CN 202021138369 U CN202021138369 U CN 202021138369U CN 213207849 U CN213207849 U CN 213207849U
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- 239000000446 fuel Substances 0.000 title claims abstract description 68
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 16
- 239000000919 ceramic Substances 0.000 claims abstract description 5
- 238000005485 electric heating Methods 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 13
- 239000010425 asbestos Substances 0.000 claims description 12
- 229910052895 riebeckite Inorganic materials 0.000 claims description 12
- 238000004321 preservation Methods 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 abstract description 29
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 230000002265 prevention Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 13
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000008358 core component Substances 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- 239000005431 greenhouse gas Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model discloses a novel pure NH3 combustor based on fuel preheats relates to resistance-type heating technical field. This novel pure NH3 combustor based on fuel is preheated, including outer device box, the fixed air pipe that is equipped with that inlays of the inside center department of outer device box, the fixed fuel pipe that is equipped with of the inside center department of air pipe, the input fixedly connected with heating device of fuel pipe, the fixed cover of surface at air pipe top is equipped with first device shell. This novel pure NH3 combustor based on fuel preheats, novel preheating device uses ceramic particle bed to strengthen the heating effect, distribute different temperature measuring point and preheat preceding temperature to the fuel, heat source temperature, the fuel temperature rise after carries out real-time supervision, provide the guide for the controllable novel pure NH3 burning experimental system of research temperature, also can produce positive impetus to the development of research fields such as burning reaction dynamics, turbulent combustion, atmosphere pollution prevention and control, have important scientific and meaning.
Description
Technical Field
The utility model relates to a resistance-type heating technical field specifically is based on novel pure NH3 combustor that fuel preheated.
Background
The swirl/turbulent premixed combustion mode is generally adopted for stable combustion, the swirl combustion is a common method for improving lean NH3 premixed flame, internal recirculation with a low-speed region is generated, so that the flame stability is enhanced, numerical simulation and experimental research of Hayakawa and the like on the turbulent premixed NH 3/air combustion show that the flow recirculation at the upstream of a combustor can form stable flame under the conditions of high turbulence intensity and high pressure, the lean premixed swirl NH3 combustion in a combustion chamber is three-dimensionally simulated by Xiao et al by adopting a large vortex simulation (LES) method to form stable swirl premixed flame, the impeller swirl combustor is adopted by Zhouyanhao and the like, the influence of different experimental parameters on the NH 3/air premixed swirl combustion stability, flame form and combustion limit is researched, the combustion performance of NH3 is enhanced for blending conventional fuel, such as blending NH3 with conventional hydrocarbon fuel such as CH4 and diesel oil, the combustion speed and the radiation characteristic of the fuel are higher than those of pure NH3, but the carbon emission caused by blended combustion is contrary to the original intention of reducing greenhouse gas emission by using NH3 fuel, and the contradiction is highlighted by the experimental research of non-premixed jet combustion of NH3/CH4 mixed fuel and air in the early period: as the proportion of NH3 in the mixed fuel increases, the flame lift effect is significant; when the content of NH3 is increased to 50%, stable combustion has not been formed; when the content of NH3 is increased to 65%, the mixed fuel at normal temperature can not be ignited, and for the combustion of NH3/H2 mixed fuel in an engine, the proportion of H2 needs to reach about 10%, which causes the trouble of safety and economy when the H2 fuel is used again, and even if an improved burner based on swirl combustion and a two-stage combustion mode is adopted, the NH3 fuel needs to be ignited by utilizing H2.
SUMMERY OF THE UTILITY MODEL
The utility model provides a novel pure NH3 combustor based on fuel preheats compares traditional fossil fuel or hydrocarbon burning more cleaner, is difficult to catch fire the problem of surely burning and provides new solution for NH3, and can obtain accurate control, also can produce positive impetus to the development of research fields such as burning reaction dynamics, turbulent combustion, atmosphere pollution prevention and control moreover, has important scientific meaning.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: novel pure NH3 combustor based on fuel preheats, including outer device box, the fixed air hose that is equipped with that inlays in the inside center department of outer device box, the fixed fuel pipe that is equipped with of center department of air hose inside, the input fixedly connected with heating device of fuel pipe, the fixed cover of surface at air hose top is equipped with first device shell, the bottom fixed mounting of outer device box inner wall has the second device shell.
Heating device includes the shell, the fixed heat preservation asbestos layer that is provided with in inside of shell, the inside packing on heat preservation asbestos layer has spherical ceramic particle, the fixed gas seal pipe that inlays in inside on heat preservation asbestos layer, the fixed electrothermal tube that is equipped with in inside of gas seal pipe, the left side of electrothermal tube is connected with the temperature control case through the auxiliary line, the electrothermal tube surface is close to the fixed admission line that inlays in left top, the fixed temperature meter that is equipped with in top that the electrothermal tube is close to center department, the left side fixedly connected with pipeline of giving vent to anger of gas seal pipe surface.
For the convenience of mixing with air, as the utility model discloses based on the pure NH3 combustor preference of novel of fuel preheating, the top fixed mounting of fuel pipe has the nozzle, the bottom fixed mounting that the surface of fuel pipe is close to the nozzle has the whirl blade.
In order to mix NH3 and air conveniently, as the utility model discloses based on the fuel preheats novel pure NH3 combustor is preferred, the particle mixing chamber has been seted up to the inside of second device shell, the wake chamber has been seted up to the inside of first device shell, circular through-hole, two have all been seted up with the bottom of particle mixing chamber inner wall to the wake chamber the input of circular through-hole all is connected with outside air compressor's output, the fixed surface of first device shell is connected at the top of outer device box inner wall.
For the convenience of connection with the heating device, as the utility model discloses novel pure NH3 combustor based on fuel is preferred, the air pipe runs through outer device box, first device shell and second device shell, and the air pipe extends to the bottom of outer device box.
In order to facilitate the rotation of the swirl vanes, the utility model discloses a novel pure NH3 combustor based on fuel preheating is preferred, the top of air pipe inner wall has been seted up with swirl vane assorted recess, the inside center department of air pipe has seted up with fuel pipe assorted through-hole.
In order to conveniently adjust the height of the outer device box, as the utility model discloses it is preferred based on the novel pure NH3 combustor that the fuel preheats, there are a plurality of leveling bolts bottom of outer device box surface through threaded connection, the bottom of outer device box surface seted up with leveling bolt assorted screw thread through-hole.
The utility model provides a novel pure NH3 combustor based on fuel preheats. The method has the following beneficial effects:
(1) this novel pure NH3 combustor based on fuel preheats, novel preheating device uses ceramic particle bed to strengthen the heating effect, distribute different temperature measuring point to the fuel temperature before preheating, the heat source temperature, the fuel intensifies the back temperature and carries out real-time supervision, provide the guidance for the controllable novel pure NH3 burning experimental system of research temperature, the research achievement not only has important theoretical value to a series of basic scientific problems who solves NH3 combustion process, and also to the development in research fields such as burning reaction dynamics, turbulent combustion, air pollution prevention and control also can produce positive impetus, important scientific significance has.
(2) The novel pure NH3 combustor based on fuel preheating ignites after preheating and heating NH3 fuel before combustion, and provides a new solution for the problem that NH3 is difficult to catch fire and is stable in combustion.
(3) The novel pure NH3 burner based on fuel preheating has the advantages of stable performance of the resistance heater, uniform heating, high thermal efficiency and less environmental pollution, and the heating temperature of a target object can be selected in a wide range from room temperature to over 1000 ℃ according to the heating process requirement and can be accurately controlled.
(4) The new pure NH3 burner based on fuel preheating is the most attractive and promising new carbon-free alternative fuel with NH3 in the worldwide scientific wave devoted to reducing greenhouse gas emissions. The use of a novel alternative fuel NH3 can effectively relieve the fuel shortage crisis, and the combustion product is free from CO2 emission and is cleaner than the conventional fossil fuel or hydrocarbon combustion.
Drawings
FIG. 1 is a perspective view of the burner structure of the present invention;
fig. 2 is a plan view of the structure of the fuel preheating pipe of the present invention.
In the figure: 1. an external device case; 2. a housing; 208. a temperature meter; 202. a heat-insulating asbestos layer; 203. a gas-tight tube; 204. an air outlet pipe; 205. an electric heating tube; 206. a temperature control box; 207. an air intake duct; 3. an air tube; 301. a fuel tube; 302. a swirl vane; 303. burning a nozzle; 4. a particle mixing chamber; 401. a flow-accompanying cavity; 402. a circular through hole; 403. a first device housing; 404. a second device housing; 5. leveling bolts.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a novel pure NH3 burner based on fuel preheating comprises an outer device box 1, an air pipe 3 is fixedly embedded in the center of the inner part of the outer device box 1, a fuel pipe 301 is fixedly embedded in the center of the inner part of the air pipe 3, the input end of the fuel pipe 301 is fixedly connected with a heating device, a first device shell 403 is fixedly sleeved on the outer surface of the top of the air pipe 3, a second device shell 404 is fixedly installed at the bottom of the inner wall of the outer device box 1, the heating device comprises a shell 2, a heat preservation asbestos layer 202 is fixedly arranged in the shell 2, spherical ceramic particles are filled in the heat preservation asbestos layer 202, a gas sealing pipe 203 is fixedly embedded in the heat preservation asbestos layer 202, an electric heating pipe 205 is fixedly embedded in the gas sealing pipe 203, the left side of the electric heating pipe 205 is connected with a temperature control box 206 through an auxiliary line, and an air inlet pipeline 207 is fixedly embedded on the, a temperature measuring meter 208 is fixedly embedded at the top of the electric heating tube 205 close to the center, an air outlet pipeline 204 is fixedly connected to the left side of the outer surface of the air sealing tube 203, the air tube 3 penetrates through the outer device box 1, the first device shell 403 and the second device shell 404, the air tube 3 extends to the bottom of the outer device box 1, a groove matched with the rotational flow blade 302 is formed in the top of the inner wall of the air tube 3, and a through hole matched with the fuel tube 301 is formed in the center of the inner part of the air tube 3.
In this embodiment: the core component, the electric heating tube 205 is controlled by the temperature control box 206, the temperature control box 206 can realize the conversion of heating power, the power is distributed by setting an expected target temperature, and after the power supply is connected, the electric heating tube 205 can be heated in a short time. After flowing in from the opening of the inlet pipe 207, NH3 is fully heat exchanged in the tubular electric heating tube 205 and then flows out through the outlet pipe 204. The gas sealing tube 203 wrapped outside the electrothermal tube 205 can effectively prevent gas from escaping. The heat preservation asbestos layer 202 has the function of reducing heat loss to the greatest extent possible, when NH3 enters the fuel pipe 301 through the gas outlet pipe 204, air is supplied by the air compressor, and enters the particle mixing chamber 4 below the heating device in four ways to be further uniformly mixed, and forms swirling air after passing through the swirling vanes 302 upwards, so that sufficient oxidant is provided for NH3 combustion.
Specifically, a burner 303 is fixedly mounted on the top of the fuel pipe 301, and swirl vanes 302 are fixedly mounted on the outer surface of the fuel pipe 301 near the bottom of the burner 303.
In this embodiment: the particles are further uniformly mixed in the particle mixing chamber 4 below the heating device in four ways, and form cyclone air after passing through the cyclone blades 302 upwards, so that sufficient oxidant is provided for NH3 combustion.
Specifically, the particle mixing chamber 4 has been seted up to the inside of second device shell 404, the wake flow chamber 401 has been seted up to the inside of first device shell 403, circular through-hole 402 has all been seted up to the bottom of wake flow chamber 401 and particle mixing chamber 4 inner wall, and the input of two circular through-holes 402 all is connected with the output of outside air compressor, and the external surface fixed connection of first device shell 403 is at the top of outer device box 1 inner wall.
In this embodiment: NH3 gas heated by the preheating pipe is introduced into the accompanying flow cavity 401 through the fuel pipe 301, and is mixed with a certain amount of accompanying flow air provided by the accompanying flow cavity 401 and the circular through hole 402 at the outlet of the burner 303 from the periphery of the fuel pipe 301 to be ignited, so that ignition and stable combustion of NH3 are realized.
Specifically, the bottom of the outer surface of the outer device box 1 is connected with a plurality of leveling bolts 5 through threads, and the bottom of the outer surface of the outer device box 1 is provided with threaded through holes matched with the leveling bolts 5.
In this embodiment: the leveling bolt 5 is used to adjust the height and balance of the outer device case 1.
When the electric heating tube 205 is used, the core component is controlled by the temperature control box 206, the temperature control box 206 can realize the conversion of heating power, the power is distributed by setting an expected target temperature, and after the power supply is connected, the electric heating tube 205 can be heated in a short time. After flowing in from the opening of the inlet pipe 207, NH3 is fully heat exchanged in the tubular electric heating tube 205 and then flows out through the outlet pipe 204. The gas sealing tube 203 wrapped outside the electrothermal tube 205 can effectively prevent gas from escaping. The heat preservation asbestos layer 202 has the function of reducing heat loss to the greatest extent possible, when NH3 enters the fuel pipe 301 through the gas outlet pipe 204, air is supplied by an air compressor, the air enters the particle mixing cavity 4 below the heating device in four ways to be further uniformly mixed, swirling air is formed after the air passes through the swirling vanes 302 upwards, sufficient oxidant is provided for NH3 combustion, NH3 gas heated by the preheating pipe is guided into the wake flow cavity 401 through the fuel pipe 301, and a certain amount of wake flow air is provided from the periphery wake flow cavity 401 and the circular through holes 402 of the fuel pipe 301 at the outlet of the burner 303 to be mixed and ignited, so that ignition and stable combustion of NH3 are realized.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. Novel pure NH3 combustor based on fuel preheats, including outer device box (1), its characterized in that: an air pipe (3) is fixedly embedded in the center of the inner part of the outer device box (1), a fuel pipe (301) is fixedly embedded in the center of the inner part of the air pipe (3), the input end of the fuel pipe (301) is fixedly connected with a heating device, a first device shell (403) is fixedly sleeved on the outer surface of the top of the air pipe (3), and a second device shell (404) is fixedly installed at the bottom of the inner wall of the outer device box (1);
the heating device comprises a shell (2), a heat-preservation asbestos layer (202) is fixedly arranged in the shell (2), spherical ceramic particles are filled in the heat-preservation asbestos layer (202), a gas sealing pipe (203) is fixedly embedded in the heat-preservation asbestos layer (202), an electric heating pipe (205) is fixedly embedded in the gas sealing pipe (203), the left side of the electric heating pipe (205) is connected with a temperature control box (206) through an auxiliary line, an air inlet pipeline (207) is fixedly embedded in the position, close to the left side, of the outer surface of the electric heating pipe (205), a temperature measuring meter (208) is fixedly embedded in the position, close to the center, of the electric heating pipe (205), and an air outlet pipeline (204) is fixedly connected to the left side of the outer surface of the gas sealing pipe (203).
2. The new pure NH3 burner based on fuel preheating according to claim 1, characterized in that: the top of the fuel pipe (301) is fixedly provided with a burner (303), and the outer surface of the fuel pipe (301) close to the bottom of the burner (303) is fixedly provided with swirl vanes (302).
3. The new pure NH3 burner based on fuel preheating according to claim 1, characterized in that: particle mixing chamber (4) have been seted up to the inside of second device shell (404), companion flow chamber (401) have been seted up to the inside of first device shell (403), circular through-hole (402) have all been seted up to companion flow chamber (401) and the bottom of particle mixing chamber (4) inner wall, two the input of circular through-hole (402) all is connected with outside air compressor's output, the fixed connection of surface at the top of outer device box (1) inner wall of first device shell (403).
4. The new pure NH3 burner based on fuel preheating according to claim 1, characterized in that: the air tube (3) penetrates through the outer device box (1), the first device shell (403) and the second device shell (404), and the air tube (3) extends to the bottom of the outer device box (1).
5. The new pure NH3 burner based on fuel preheating according to claim 1, characterized in that: the top of air pipe (3) inner wall is seted up with whirl blade (302) assorted recess, the center department of air pipe (3) inside is seted up with fuel pipe (301) assorted through-hole.
6. The new pure NH3 burner based on fuel preheating according to claim 1, characterized in that: the bottom of the outer surface of the outer device box (1) is connected with a plurality of leveling bolts (5) through threads, and threaded through holes matched with the leveling bolts (5) are formed in the bottom of the outer surface of the outer device box (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021138369.6U CN213207849U (en) | 2020-06-18 | 2020-06-18 | Novel pure NH3 combustor based on fuel is preheated |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021138369.6U CN213207849U (en) | 2020-06-18 | 2020-06-18 | Novel pure NH3 combustor based on fuel is preheated |
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| CN213207849U true CN213207849U (en) | 2021-05-14 |
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| CN202021138369.6U Active CN213207849U (en) | 2020-06-18 | 2020-06-18 | Novel pure NH3 combustor based on fuel is preheated |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113864783A (en) * | 2021-09-06 | 2021-12-31 | 清华大学 | Ammonia fuel fast pyrolysis grading injection gun |
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2020
- 2020-06-18 CN CN202021138369.6U patent/CN213207849U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113864783A (en) * | 2021-09-06 | 2021-12-31 | 清华大学 | Ammonia fuel fast pyrolysis grading injection gun |
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