CN214840808U - Injection type porous medium combustor - Google Patents
Injection type porous medium combustor Download PDFInfo
- Publication number
- CN214840808U CN214840808U CN202120918420.3U CN202120918420U CN214840808U CN 214840808 U CN214840808 U CN 214840808U CN 202120918420 U CN202120918420 U CN 202120918420U CN 214840808 U CN214840808 U CN 214840808U
- Authority
- CN
- China
- Prior art keywords
- porous medium
- gas
- injection type
- medium layer
- combustion chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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 relates to the technical field of burners, and provides an injection type porous medium burner, which comprises an injection type premixing device and a porous medium combustion chamber; the injection type premixing device comprises a gas nozzle, a gas premixing chamber and an air adjusting plate; the gas nozzle is arranged in the gas premixing chamber, and the air adjusting plate is used for adjusting the air flow entering the gas premixing chamber; the porous medium combustion chamber comprises the outer wall of the combustion chamber, a gas mixing area, a porous medium layer and an igniter; the porous medium layer is arranged at the upper end of the gas mixing area, and the igniter is arranged at the upper part of the porous medium combustion chamber; the outlet of the gas premixing chamber is connected with the inlet of the gas mixing area. The utility model can burn fuel gas with different properties, can adjust the air-fuel ratio, does not need a fan and reduces the cost; the porous medium combustion chamber effectively prevents tempering, has a large combustion regulation range and combustion strength, preheats upstream fuel gas through the porous medium framework, improves combustion stability, and reduces pollutant emission.
Description
Technical Field
The utility model relates to a combustor technical field, in particular to injection type porous medium combustor.
Background
With the rapid development of scientific technology in China, the restriction of energy and environment on economic development is increasingly obvious. Although China is a big energy utilization country, the problems of low efficiency, environmental pollution, large waste and the like still exist in the aspect of energy utilization. In order to improve the energy utilization rate, various low-calorific-value fuel gases in industrial production must be fully utilized to realize efficient and clean utilization of conventional energy.
The classification of the calorific value of the fuel gas is conventionally often divided into three grades, i.e. high calorific value fuel gas (HCVgas), medium calorific value fuel gas (MCVgas) and low calorific value fuel gas (LCVgas). The utilization mode is different according to the different properties of the fuel gas. The combustible components of the low-heat value gas are thin, the conventional combustion technology is difficult to directly and effectively utilize, and the problem of how to realize the complete and effective combustion of the low-heat value gas is always a difficult problem in the combustion field. The development and utilization of a novel combustion technology have important significance for improving the energy utilization efficiency of China.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming one of the not enough of prior art at least, providing an injection type porous medium combustor, based on porous medium and injection type combustor's combination technique, can make the low heat value gas that realizes fully premixing in the injector realize abundant effectual burning in porous medium. The gas produces swirl, reposition of redundant personnel and joins in porous medium pore inside, and preheats by the porous medium skeleton, and the burning is more stable. The combustion flame in the porous medium is divided by the porous medium and is represented as a volume combustion structure consisting of a plurality of small flames, the flame area is thickened, and the combustion intensity is increased.
The utility model adopts the following technical scheme:
an injection type porous medium burner comprising:
the injection type premixing device comprises a gas nozzle, a gas premixing chamber and an air adjusting plate; the gas nozzle is arranged in the gas premixing chamber, and the air adjusting plate is used for adjusting the air flow entering the gas premixing chamber;
the porous medium combustion chamber comprises a combustion chamber outer wall, a gas mixing area, a porous medium layer and an igniter; the porous medium layer is arranged at the upper end of the gas mixing area, and the igniter is arranged at the upper part of the porous medium combustion chamber;
the outlet of the gas premixing chamber is connected with the inlet of the gas mixing area;
and gas enters the gas premixing chamber through the gas nozzle, is premixed with air entering the gas premixing chamber through the air adjusting plate, enters the gas mixing area through the outlet of the gas premixing chamber for full mixing, and is ignited by the igniter and then is combusted in the porous medium layer.
In any of the above possible implementations, there is further provided an implementation in which the gas premixing chamber includes a convergent tube, a mixing tube, and an divergent tube connected in series, and the divergent tube is connected to the gas mixing zone of the porous medium combustion chamber.
Further providing an implementation mode, wherein the porous medium layer comprises a small-aperture porous medium layer on the lower layer and a large-aperture porous medium layer on the upper layer; the igniter is arranged between the small-aperture porous medium layer and the large-aperture porous medium layer.
And a metal gap partition plate is arranged at the lower part of the small-aperture porous medium layer and is used for supporting the small-aperture porous medium layer and the large-aperture porous medium layer.
Further providing an implementation mode, wherein the small-aperture porous medium layer and the large-aperture porous medium layer are both made of foamed ceramic materials; the small-aperture porous medium layer is made of foamed ceramic with the porosity of 30% -50%, and the large-aperture porous medium layer is made of foamed ceramic with the porosity of 60% -75%.
Further provided is an implementation, wherein the voids of the metal void separator are smaller than the average pore size of the small-pore porous dielectric layer.
Further provides an implementation mode, and a heat exchange pipeline is arranged at the upper part of the porous medium layer.
Further provides an implementation mode, and the heat exchange pipeline is a double-layer close-packed pipeline.
Further provided is an implementation mode, wherein the outer wall of the combustion chamber of the porous medium combustion chamber is of a cylindrical structure.
Further provides an implementation mode, the air adjusting plate is a rotary air adjusting plate and is arranged at an air inlet of the injection type premixing device.
The utility model has the advantages that:
(1) this device uses the injection type premixing ware, and the high pressure gas jar links to each other with the injection type premixing ware nozzle, and high-speed efflux blowout drives the air and gets into along the shrinkage pipe from air inlet, need not the draught fan, reduce cost.
(2) This device can adopt incision rotation type air register, realizes the convenient regulation of air-fuel ratio to do not restrict the gas kind.
(3) The bottom of the combustion chamber of the device is provided with a mixing zone, and fuel and air are fully mixed at the mixing zone, so that the combustion efficiency is facilitated.
(4) The porous medium foamed ceramic material is used in the combustion chamber of the device, the flame area is thickened, the combustion strength is increased, upstream fuel gas is preheated through the framework heat conduction of the porous medium, and the combustion temperature is improved. Meanwhile, the upper pipeline is heated by high-temperature heat radiation of the combustion area, and the heat exchange efficiency is far higher than convection and conduction heat exchange.
(5) The device adopts a double-layer variable porosity porous medium, effectively prevents the possible tempering of premixed gas and improves the combustion stability.
(6) The top of the device adopts a double-layer close-packed heat exchange pipeline, so that the radiation angle coefficient of the heat exchange pipeline in a high-temperature combustion area is maximum, and the heat exchange efficiency is maximized.
The embodiment of the present invention does not have to have all the above-mentioned beneficial effects at the same time, but inevitably has at least one of the beneficial effects.
Drawings
Fig. 1 is a schematic structural view of an injection type porous medium burner according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the injection type pre-mixer in the embodiment.
Fig. 3 is a schematic structural view of an exemplary embodiment of a notched rotary damper.
Fig. 4 is a schematic structural diagram of a double-layer close-packed heat exchange pipeline in the embodiment.
In the figure: 1-air inlet, 2-air adjusting plate, 3-gas nozzle, 4-contraction tube, 5-mixing tube, 6-gradual expansion tube, 7-combustion chamber outer wall, 8-metal pore baffle, 9-small pore diameter porous medium layer, 10-large pore diameter porous medium layer, 11-igniter, 12-gas mixing zone, 13-fixer and 14-heat exchange pipeline.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that technical features or combinations of technical features described in the following embodiments should not be considered as being isolated, and they may be combined with each other to achieve better technical effects. In the drawings of the embodiments described below, the same reference numerals appearing in the respective drawings denote the same features or components, and may be applied to different embodiments.
As shown in fig. 1, the embodiment of the utility model provides an injection type porous medium combustor includes:
the injection type premixing device comprises a gas nozzle 3, a gas premixing chamber and an air adjusting plate 2; the gas nozzle 3 is arranged in the gas premixing chamber, and the air adjusting plate 2 is used for adjusting the air flow entering the gas premixing chamber;
the porous medium combustion chamber comprises a combustion chamber outer wall 7, a gas mixing zone 12, a porous medium layer and an igniter 11; the porous medium layer is arranged at the upper end of the gas mixing zone 12, and the igniter 11 is arranged at the upper part of the porous medium combustion chamber;
the outlet of the gas premixing chamber is connected to the inlet of the gas mixing zone 12.
In a preferred embodiment, the gas premixing chamber comprises a contraction pipe 4, a mixing pipe 5 and an expansion pipe 6 which are connected in sequence, and the expansion pipe 6 is connected with a gas mixing zone 12 of the porous medium combustion chamber. The contraction pipe 4 is of a pipe diameter reducing structure, so that the air flow resistance is reduced, the manufacturing is convenient, and a channel which is long enough in the mixing pipe 5 is used for preliminarily and uniformly mixing the gas and the air; the gradually expanding pipe 6 is of a pipe diameter gradually expanding structure, so that the gas pressure is improved, then the gas enters the gas mixing zone 12, the pipe diameter is further increased, and the air and the gas are fully diffused and mixed in the gas mixing zone 12.
In one embodiment, the diameter of the constriction 4 at the inlet is 60mm, reducing the air flow resistance. The mixing pipe 5 is a cylindrical pipe with a diameter of 40mm and a length of 100mm, and a passage long enough for mixing the gas and the air primarily and uniformly. The divergent pipe 6 is of a pipe diameter divergent structure, the diameter of the divergent opening is 80mm, the gas pressure is improved, and then the gas enters the gas mixing area 12.
As a preferred embodiment, the air adjusting plate 2 adopts a rotary air adjusting plate, and the air inlet amount can be adjusted when the air adjusting plate 2 rotates; further, a slit rotary register plate, an example of which is shown in fig. 3. In one embodiment, the diameter of the notched rotary register plate 2 is 60mm, the diameter of the central through opening is 10mm, and two fan-shaped through openings with 60 degrees are formed, and the effective flow area of the air inlet 1 is controlled by rotating the register plate 2, so that the air suction amount is adjusted.
As a preferred embodiment, the porous medium layer includes a lower small-aperture porous medium layer 9 and an upper large-aperture porous medium layer 10. In one embodiment, the lower small-pore porous medium layer 9 is made of silicon carbide ceramic foam with a porosity of 43% and a thickness of 60mm, the upper layer is made of large-pore porous medium layer 10 and silicon carbide ceramic foam with a porosity of 65% and a thickness of 80mm, and fuel gas enters the combustion chamber from the bottom and diffuses to the upper layer.
Further preferably, an electric spark igniter 11 is arranged between the two porous medium layers 9 and 10 in the porous medium combustion chamber, ignition is carried out after gas is uniformly and stably diffused, the upper heat exchange pipeline 14 is heated through heat radiation in the high-temperature combustion area, the pipeline can be a double-layer close-packed pipeline, as shown in fig. 4, the radiation angle coefficient of the high-temperature combustion area to the heat exchange pipeline 14 is increased, and the heat exchange efficiency is improved.
In one embodiment, the porous medium combustion chamber outer wall 7 is a cylindrical structure with a diameter of 100mm and a height of 200mm, and reduces the external heat dissipation area.
In one embodiment, a metal pore partition plate 8 is additionally arranged at the bottom of the porous medium layer, the size of the metal pores is smaller than the average pore diameter of the porous medium, and the porous medium layer 9 with small pore diameter is arranged above the bearing part, so that premixed gas can smoothly enter.
In one embodiment, the high pressure gas pipe is connected to the gas nozzle 3 of the ejector premix burner by a pipe.
In one embodiment, the injector premixer is fixed to the porous medium combustion chamber outer wall 7 by a holder 13.
The utility model discloses theory of operation of embodiment:
the gas is emitted at a high speed through the gas nozzle 3, the air pressure of the contraction pipe 4 is reduced, the outside air is driven to enter the contraction pipe 4, the air flow is adjusted by adjusting the area of the overlapping area of the notch rotary air adjusting plate 2 and the air inlet 1, and the air-fuel ratio is further changed. The gas and air are primarily mixed in the mixing pipe 5, the pressure is increased through the gradually expanding pipe 6, and the gas and the air enter the gas mixing area 12 in the combustion chamber to be fully mixed. The gas enters the porous medium combustion area from the bottom, is uniformly and stably diffused and then is ignited and combusted by the electric spark igniter 11 between the two porous medium layers 9 and 10, and the upper heat exchange pipeline 14 is heated by high-temperature heat radiation of the combustion area.
The utility model discloses a preferred embodiment an injection type porous medium combustor can burn the gas of different properties, convenient regulation air-fuel ratio, and does not need the fan, and the porous medium combustion chamber has great burning control range and combustion strength, and accessible porous medium layer skeleton preheats the upper reaches gas, improves combustion stability, and the prevention is tempered to reduce the emission of pollutant. A large number of radiant heat exchange heating pipelines are arranged above the combustion chamber, the upper porous medium is in a high-temperature region, the radiant heat exchange intensity is far greater than that of convective heat exchange, and the radiant intensity of the solid framework is far greater than that of gas, so that the pipeline heat exchange efficiency is improved.
While several embodiments of the present invention have been presented herein, it will be appreciated by those skilled in the art that changes can be made to the embodiments herein without departing from the spirit of the invention. The above-described embodiments are merely exemplary and should not be taken as limiting the scope of the invention.
Claims (10)
1. The utility model provides an injection type porous medium combustor which characterized in that, injection type porous medium combustor includes:
the injection type premixing device comprises a gas nozzle, a gas premixing chamber and an air adjusting plate; the gas nozzle is arranged in the gas premixing chamber, and the air adjusting plate is used for adjusting the air flow entering the gas premixing chamber;
the porous medium combustion chamber comprises a combustion chamber outer wall, a gas mixing area, a porous medium layer and an igniter; the porous medium layer is arranged at the upper end part of the gas mixing area, and the igniter is arranged at the upper part of the porous medium combustion chamber;
the outlet of the gas premixing chamber is connected with the inlet of the gas mixing area.
2. The injection type porous medium combustor of claim 1, wherein the gas premixing chamber comprises a contraction pipe, a mixing pipe and a gradually expanding pipe which are connected in sequence, and the gradually expanding pipe is connected with a gas mixing area of the porous medium combustion chamber.
3. The injection type porous medium burner of claim 1, wherein the porous medium layer comprises a lower small-aperture porous medium layer and an upper large-aperture porous medium layer; the igniter is arranged between the small-aperture porous medium layer and the large-aperture porous medium layer.
4. The injection type porous medium burner of claim 3, wherein a metal gap baffle is arranged at the lower part of the small-aperture porous medium layer and is used for supporting the small-aperture porous medium layer and the large-aperture porous medium layer.
5. The injection type porous medium burner of claim 3, wherein the small-aperture porous medium layer and the large-aperture porous medium layer are both made of foamed ceramic materials; the small-aperture porous medium layer is made of foamed ceramic with the porosity of 30% -50%, and the large-aperture porous medium layer is made of foamed ceramic with the porosity of 60% -75%.
6. The ejector porous media burner of claim 4, wherein the metal gap separator has gaps smaller than the average pore size of the small pore size porous media layer.
7. The injection type porous medium burner as claimed in any one of claims 1 to 6, wherein a heat exchange pipeline is arranged at the upper part of the porous medium layer.
8. The injection type porous medium burner of claim 7, wherein the heat exchange pipe is a double-layer close-packed pipe.
9. The injection type porous medium burner of claim 1, wherein the outer wall of the combustion chamber of the porous medium combustion chamber is of a cylindrical structure.
10. The injection type porous medium burner of claim 1, wherein the air adjusting plate is a rotary air adjusting plate and is arranged at an air inlet of the injection type pre-mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120918420.3U CN214840808U (en) | 2021-04-29 | 2021-04-29 | Injection type porous medium combustor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120918420.3U CN214840808U (en) | 2021-04-29 | 2021-04-29 | Injection type porous medium combustor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214840808U true CN214840808U (en) | 2021-11-23 |
Family
ID=78771292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120918420.3U Expired - Fee Related CN214840808U (en) | 2021-04-29 | 2021-04-29 | Injection type porous medium combustor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214840808U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116428589A (en) * | 2023-05-31 | 2023-07-14 | 广东顺德西安交通大学研究院 | Burner |
-
2021
- 2021-04-29 CN CN202120918420.3U patent/CN214840808U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116428589A (en) * | 2023-05-31 | 2023-07-14 | 广东顺德西安交通大学研究院 | Burner |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2484481Y (en) | Gradual-change porous-medium burner | |
| CN108180475B (en) | Premixed gas porous medium burner capable of stabilizing combustion axially and radially | |
| CN104089287B (en) | Cylindrical radiation porous medium heater capable of achieving diffusive combustion in cavity | |
| CN102418927B (en) | Gradually-expanding premixing porous medium combustor for combusting biomass gasification gas | |
| CN1828137B (en) | Gas fuel catalytic combustor | |
| CN107300169A (en) | The catalytic flameless burner and combustion method of a kind of extremely low pollutant emission | |
| CN110425536B (en) | Angle type porous medium burner | |
| CN214840808U (en) | Injection type porous medium combustor | |
| CN111396873A (en) | Heat storage premixed biomass gas burner and use method thereof | |
| CN112212328A (en) | Burner and use thereof | |
| CN216346263U (en) | Novel marsh gas low-nitrogen burner | |
| CN109185882A (en) | A kind of gradual-enlargement type porous media combustor | |
| CN114935146B (en) | Flow equalization type porous medium burner and working method thereof | |
| CN208901632U (en) | A kind of energy-saving hot air stove | |
| CN115264498A (en) | Injection type porous medium combustor | |
| CN208349289U (en) | A kind of porous media combustor of subsidiary heat exchange function | |
| CN109869718B (en) | Inclined axial rotation porous medium burner | |
| CN112443838B (en) | Air blast premixed porous medium combustion radiator with secondary air and combustion method thereof | |
| CN203010604U (en) | Corrosion resistant duel fuel combustor | |
| CN102261675A (en) | Energy-saving furnace with cyclone generator | |
| CN112128751B (en) | Porous medium combustor matched with foamed ceramic | |
| CN202092183U (en) | Energy-saving stove with cyclone generator | |
| CN105402725A (en) | Micro diffuse type combustion apparatus for micro-thermphotoelectric system | |
| CN103994437B (en) | Back-heating type bicone flames in opposing direction porous media combustor | |
| CN212057277U (en) | Biomass gas burner with heat storage combustion chamber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211123 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |