CN215765074U - Combustor suitable for low-heat-value biogas - Google Patents
Combustor suitable for low-heat-value biogas Download PDFInfo
- Publication number
- CN215765074U CN215765074U CN202120926634.5U CN202120926634U CN215765074U CN 215765074 U CN215765074 U CN 215765074U CN 202120926634 U CN202120926634 U CN 202120926634U CN 215765074 U CN215765074 U CN 215765074U
- Authority
- CN
- China
- Prior art keywords
- biogas
- burner
- preheating
- combustor
- flame
- 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.)
- Active
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
Landscapes
- Combustion Of Fluid Fuel (AREA)
Abstract
The utility model discloses a combustor suitable for low-heat value marsh gas. A circular groove structure and a telescopic central pipeline penetrating the groove and the bottom of the burner shell are arranged in the middle of the inside of the burner shell, a preheating flame stabilizing disc with a plurality of small holes is covered at the upper end of the central pipeline, and a preheating cavity is formed between the preheating flame stabilizing disc and the groove of the circular groove; the bottom of the circular groove structure is provided with a plurality of through holes, air swirl blades are arranged between the circular groove structure and the inner side wall of the combustor shell, and air inlets are formed in the side wall of the combustor shell below the air swirl blades; the upper side wall and the position higher than the circular groove structure are provided with a telescopic electronic ignition gun and a flame detector. The burner is simple in structure, and after optimization, the low-calorific-value biogas entering the burner is preheated, so that stable combustion is guaranteed, consumption of natural gas is reduced, running cost is reduced, and the utilization rate of the garbage leachate by-products in treatment is improved.
Description
Technical Field
The utility model relates to a burner suitable for low-calorific-value biogas.
Background
A large amount of leachate is generated in a waste incineration power plant every day, methane is generated in the leachate fermentation process, and the methane contains combustible gas, mainly takes methane and is accompanied by partial CO and the like. Due to the instability of the fermentation process, the content of combustible gas fluctuates to some extent, and the methane content is usually between 30% and 80% according to the on-site detection result of the project. When the methane content is low, the generated methane is difficult to directly combust through a combustor, and is usually sent to a garbage incinerator to be completely combusted together with garbage. The fluctuation of combustible components in the biogas can cause the instability of the biogas combustion process, which is very unfavorable for the direct combustion and utilization of the biogas.
CN106122963A provides a hydrogen-doped biogas burner, which improves the combustion performance of biogas by doping hydrogen into biogas. CN102853427A provides a structure of a biogas burner, which mixes part of air into biogas by jet injection of biogas to improve the burning characteristics of biogas, and increases small hole channels by nozzles to prevent backfire during the burning process of biogas. CN210772162U provides a cyclone biogas burner, which ensures efficient combustion of biogas by means of air cyclone. CN210267208U provides a whirlwind is from inhaling formula marsh gas combustor, utilizes whirlwind and efflux injection effect, mixes part air to the marsh gas to improve the burning characteristic of marsh gas, increases return circuit and marsh gas detection device simultaneously, ensures the safety of combustor. CN208124289U discloses a combustor of pig house methane boiler, including tuber pipe, the natural pond pipe of setting in tuber pipe one end, the flame holder who sets up at the hybrid tube top and install the burner at the flame holder top. According to the burner of the piggery biogas boiler, combustion-supporting air is transmitted to the interior of the air pipe through the air supply pipe, and the leaf fan is driven to rotate on the rotating shaft, so that a cyclone is formed on the surface of the leaf fan and is discharged from the plurality of air distribution ports, on one hand, the contact range of the combustion-supporting air is enlarged, the combustion efficiency is improved, and on the other hand, the phenomenon that flame is blown out due to overlarge and concentrated air speed is prevented; when the combustion-supporting air passes through the flame stabilizing ring, the surface of the flame stabilizing ring has different wind speeds to generate a negative pressure region, so that the combustion-supporting air can generate a backflow phenomenon of a part of space after passing through the flame stabilizing ring, and in the backflow region, the incandescent air flow can continuously flow back to ensure that the combustion-supporting air and methane mixture backflow region with different air-fuel ratios ignites and burns, thereby achieving the effect of stable combustion. This is done.
Through the search of the technical scheme, the structure of the existing biogas burner is simpler, and the stable combustion of biogas is generally ensured by adopting a rotational flow or premixing mode. To the marsh gas combustor that has the whirl structure, the combustor of this kind of structure can guarantee the good mixture of marsh gas and air to a certain extent, can utilize the structural feature of whirl combustor simultaneously, and the high-temperature gas that produces after the partial burning of entrainment maintains going on smoothly of combustion process, has certain effect to stable burning, nevertheless is not big to the marsh gas effect that methane content is lower, and probably because the whirl effect is too strong for flame surface stretch rate is too high, destroys the stable of combustion process and goes on. Although the stable combustion of the biogas burner adopting a premixing form is greatly improved, the risk of backfire and deflagration can be generated after the biogas is mixed with air, and the safety is not good enough in engineering use; if the stable combustion process of the biogas is maintained in a mode of premixing combustible gas with high calorific value throughout the year, the stable combustion effect is excellent, but the operation cost is higher.
SUMMERY OF THE UTILITY MODEL
Aiming at the problem of unstable combustion of the burner in the prior art, the utility model provides the burner suitable for the low-heat-value biogas, the burner is simple in structure, the low-heat-value biogas entering the burner is preheated after optimization, and the preheating process can be self-maintained by absorption and conduction of flame radiation heat through a flame stabilizing disc in the combustion process, so that the stable combustion is ensured, meanwhile, the consumption of natural gas is reduced, the operation cost is reduced, and the utilization rate of waste leachate byproducts in the treatment is improved.
In order to solve the problems of the prior art, the utility model adopts the technical scheme that:
a circular groove structure is arranged in the middle of the combustor shell, and a telescopic central pipeline is arranged at the bottom of the combustor shell and penetrates through a groove; a preheating flame stabilizing disc covers a port of the central pipeline in the combustor shell, and a plurality of small holes are formed in the center of the preheating flame stabilizing disc; a preheating cavity is formed between the preheating flame stabilizing disc and the groove of the circular groove structure; the bottom of the circular groove structure is provided with a plurality of through holes, and the through holes penetrate through the bottom of the combustor shell; an air swirl blade is arranged between the circular groove structure and the inner side wall of the combustor shell, and an air inlet is arranged on the side wall of the combustor shell below the air swirl blade; the burner shell is characterized in that the upper side wall and the position of the burner shell are higher than the upper edge of the circular groove structure, a telescopic electronic ignition gun and a flame detector are arranged, the telescopic electronic ignition gun can be inserted into the preheating cavity, the flame detector can move up and down along the inner side wall, and the flame detector is higher than the preheating flame stabilizing disc.
As an improvement, the small holes on the preheating flame stabilizing disc are circular and are uniformly distributed.
The improvement wherein the total area of said apertures is from 0.6 to 0.8 of the cross-sectional area of the central conduit.
In a further improvement, the number of the small holes is 10-20.
As an improvement, the through hole is connected with the natural gas input pipeline or the air input pipeline through a quick-connection male-female lock catch.
As an improvement, the thickness of the preheating flame stabilizing disc is 0.8-1.5cm (the preheating effect on the biogas can be ensured, and the pressure loss of the combustor is reasonably controlled).
As a refinement, the flame detector is an optical flame detector.
The utility model adopts the burner structure for self-maintaining heating of the biogas, preheats the biogas to a certain degree, thereby improving the combustion performance of the biogas, ensuring the stable combustion of the biogas, and the burner structure can be adjusted to a certain degree, thereby further enhancing the adaptability of the biogas burner to the working conditions.
Has the advantages that:
compared with the prior art, the combustor suitable for the low-calorific-value biogas has the following advantages:
1. according to the utility model, the preheating flame stabilizing disc is arranged at the upper end port of the central pipeline, so that the low-calorific-value biogas can be heated by effectively absorbing the radiant heat of flame, and the combustion stability can be maintained without an external heat source;
2. the central pipeline adopts a telescopic form, can effectively adjust the flame form, and is suitable for low-heat value biogas with different combustion characteristics;
3. the burner has strong adaptability, and can adopt a small amount of natural gas to maintain the stability of the low-heat value biogas combustion process under extreme working conditions (the biogas heat value is extremely low or the burner load is low), thereby reducing the operation cost and lowering the cost;
4. under normal working conditions (the heat value of the biogas basically conforms to the design heat value, the deviation does not exceed +/-30 percent, and the load of the burner is not lower than 70 percent), the stability of the combustion process can be maintained without consuming natural gas.
Drawings
Fig. 1 is a schematic structural diagram of a burner suitable for low-calorific-value biogas, wherein 1-a burner shell, 2-a circular groove structure, 3-a central pipeline, 4-a preheating flame stabilizing disc, 5-a through hole, 6-an air swirl vane, 7-an electronic ignition gun, 8-an air inlet and 9-a flame detector.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Example 1
A circular groove structure is arranged in the middle of the combustor shell, and a telescopic central pipeline is arranged at the bottom of the combustor shell and penetrates through a groove; a preheating flame stabilizing disc covers a port of the central pipeline in the combustor shell, and a plurality of small holes are formed in the center of the preheating flame stabilizing disc; a preheating cavity is formed between the preheating flame stabilizing disc and the groove of the circular groove structure; the bottom of the circular groove structure is provided with a plurality of through holes, and the through holes penetrate through the bottom of the combustor shell; an air swirl blade is arranged between the circular groove structure and the inner side wall of the combustor shell, and an air inlet is arranged on the side wall of the combustor shell below the air swirl blade; the burner housing is characterized in that the upper side wall and the position of the burner housing are higher than the upper edge of the circular groove structure and are provided with a telescopic electronic ignition gun and a flame detector, the telescopic electronic ignition gun can be inserted into the preheating cavity, the flame detector can move up and down along the inner side wall, and the flame detector is only required to be higher than the preheating flame stabilizing disc to realize the stable monitoring effect.
The preheating flame stabilizing disc is good in heat conducting performance, the thickness of the preheating flame stabilizing disc is 0.8-1.5cm, the preheating flame stabilizing disc is directly connected with the central pipeline in a welding mode, heat conduction can be achieved between the preheating flame stabilizing disc and the central pipeline, the shape of the small holes can be determined according to the size and the shape of the central pipeline, the number of the small holes is 10-20, and the total area of the small holes accounts for 0.6-0.8 of the cross section area of the central pipeline.
The central pipeline can be stretched in a mechanical or manual mode and can be adjusted according to the combustion condition of the biogas.
The through holes are respectively connected with the natural gas input pipeline and the air input pipeline, and at least 1 natural gas input pipeline and 1 air input pipeline are ensured in all pipelines connected with the through holes, so that the natural gas is ensured to be combusted, and high-temperature flue gas is generated; the through hole can be connected with the natural gas input pipeline and the air input pipeline by adopting a quick-connection male-female lock catch.
Air swirl blades are arranged outside the preheating cavity, a cavity is formed in the bottom of each swirl blade, air enters from the cavity at the bottom, generates swirl through the swirl blades and is mixed with biogas to perform combustion reaction.
A telescopic electronic ignition gun is arranged on the side surface of the combustor and is used for igniting the biogas combustor; and an optical flame monitor is arranged for monitoring the combustion condition of the biogas.
Example 2
The combustor suitable for low-calorific-value biogas in the embodiment 1 is utilized for working, and the specific process comprises the following steps:
during the ignition, retract central line to combustor innermost through mechanical or manual mode, send into a small amount of natural gas and air in preheating the intracavity, use retractable electron burning torch to preheat the chamber and effectively ignite, after successfully igniteing, take certain distance out in following the combustion chamber with the electron burning torch, prevent that the electron burning torch is direct to be contacted with high temperature flue gas and burnt out. After the natural gas in the preheating cavity is stably combusted, high-temperature flue gas flows out from a gap between the preheating flame stabilizing disc and the circular groove structure, and the central pipeline and the preheating flame stabilizing disc are effectively heated; at the moment, low-heat value methane is sent into the central pipeline and air is input from the air inlet, and when the low-heat value methane passes through the central pipeline and the preheating flame stabilizing disc, the low-heat value methane is preheated by the central pipeline and the preheating flame stabilizing disc, and then is effectively mixed with the air after the air rotating blades rotate, and is simultaneously mixed with high-temperature smoke discharged from the preheating cavity, so that the low-heat value methane can be effectively ignited and starts to burn.
Through simulation calculation, when the design working condition of the burner stably runs, the temperature of the preheating flame stabilization plate is about 400-450 ℃, the low-heat value biogas can be effectively preheated from room temperature to 100-150 ℃, and the stable combustion of the low-heat value biogas is maintained.
After the biogas burner is successfully ignited, under the action of swirl air, the distance of the central pipeline inserted into the burner is reasonably adjusted, so that a short and powerful flame can be formed in the burning process of biogas, the flame temperature is high, the preheating flame stabilizing disc can be effectively subjected to heat radiation, the preheating flame stabilizing disc is continuously heated, the preheating flame stabilizing disc is connected with the central pipeline, the heat can be continuously transmitted to the central pipeline, and the heat of the preheating flame stabilizing disc can be continuously taken away when low-calorific-value biogas flows through the central pipeline and the preheating flame stabilizing disc, so that the low-calorific-value biogas is preheated, and the low-calorific-value biogas can be stably burnt in a preheating state.
When the biogas is stably combusted, the preheating flame stabilizing disc can absorb the radiant heat generated by flame combustion, so that the preheating flame stabilizing disc can keep a higher temperature to preheat the biogas, and meanwhile, the preheating flame stabilizing disc is welded with the central pipeline and both the preheating flame stabilizing disc and the central pipeline are made of metal materials, so that the biogas sent into the combustor can be continuously preheated after entering the central pipeline, the biogas preheating and stable combustion can be maintained without consuming natural gas, and the consumption of the natural gas can be greatly saved; meanwhile, the telescopic electronic ignition gun is completely moved out of the combustion chamber, so that the electronic ignition gun is prevented from being burnt out, and the operation and maintenance cost of the equipment is saved. Through tests, the stability of the combustion process can be maintained without consuming natural gas under the normal working condition (the heat value of the biogas basically conforms to the design heat value, the deviation does not exceed +/-30 percent, and the load of a combustor is not lower than 70 percent).
The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and any simple modifications or equivalent substitutions of the technical solutions that can be obviously obtained by those skilled in the art within the technical scope of the present invention are within the scope of the present invention.
Claims (7)
1. The combustor suitable for the low-calorific-value biogas is characterized by comprising a combustor shell (1) with an opening at the upper end, wherein a circular groove structure (2) is arranged in the middle of the combustor shell (1), and a telescopic central pipeline (3) is arranged at the bottom of a penetrating groove and the combustor shell; a preheating flame stabilizing disc (4) covers a port of the central pipeline (3) positioned in the combustor shell (1), and a plurality of small holes are formed in the center of the preheating flame stabilizing disc (4); a preheating cavity is formed between the preheating flame stabilizing disc (4) and the groove of the circular groove structure (2); the bottom of the circular groove structure (2) is provided with a plurality of through holes (5), and the through holes (5) penetrate through the bottom of the combustor shell (1); an air swirl blade (6) is arranged between the circular groove structure (2) and the inner side wall of the combustor shell (1), and an air inlet (8) is arranged on the side wall of the combustor shell (1) below the air swirl blade (6); the side wall just is higher than the border department on circular slot structure (2) and is equipped with retractable electron burning torch (7) and flame detector (9) on the side wall of going up of combustor casing (1), retractable electron burning torch can insert and preheat the intracavity, the flame detector can reciprocate along the inside wall, guarantees that the flame detector is higher than preheating steady flame dish.
2. Burner suitable for biogas with low calorific value according to claim 1, characterized in that the holes of the pre-heating flame stabilizing disc (4) are circular and evenly distributed.
3. Burner for biogas with a low calorific value, according to claim 1, wherein the total area of the apertures represents 0.6-0.8 of the cross-sectional area of the central tube.
4. Burner for biogas with a low calorific value, according to claim 3, characterized in that the number of said holes is comprised between 10 and 20.
5. Burner suitable for biogas with a low calorific value according to claim 1, characterized in that the through hole (5) is connected with the natural gas input pipeline or the air input pipeline by a quick-connect male-female lock.
6. Burner for biogas with a low calorific value, according to claim 1, characterized in that the thickness of the pre-heating flame-stabilizing disc (4) is 0.8-1.5 cm.
7. Burner for biogas with low heating value, according to claim 1, characterized in that the flame detector (9) is an optical flame detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120926634.5U CN215765074U (en) | 2021-04-30 | 2021-04-30 | Combustor suitable for low-heat-value biogas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120926634.5U CN215765074U (en) | 2021-04-30 | 2021-04-30 | Combustor suitable for low-heat-value biogas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215765074U true CN215765074U (en) | 2022-02-08 |
Family
ID=80096416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120926634.5U Active CN215765074U (en) | 2021-04-30 | 2021-04-30 | Combustor suitable for low-heat-value biogas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215765074U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114574330A (en) * | 2022-05-06 | 2022-06-03 | 成都剀瑞环保工程有限公司 | Methane energy conversion structure for residential heating |
-
2021
- 2021-04-30 CN CN202120926634.5U patent/CN215765074U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114574330A (en) * | 2022-05-06 | 2022-06-03 | 成都剀瑞环保工程有限公司 | Methane energy conversion structure for residential heating |
| CN114574330B (en) * | 2022-05-06 | 2022-07-08 | 成都剀瑞环保工程有限公司 | Methane energy conversion structure for residential heating |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205504983U (en) | Gas recirculation low NOx burner in combustion -supporting wind injection type stove | |
| CN201521963U (en) | Low heat value gas fuel combustor | |
| CN107420892A (en) | A kind of outer circulation smoke backflow formula all-premixing burner | |
| CN107894001B (en) | Special burner for incinerating high boiling point waste liquid and waste gas | |
| CN215765074U (en) | Combustor suitable for low-heat-value biogas | |
| CN114234192A (en) | Hydrogen-burning ultra-low NOx and CO emission combustor | |
| CN116241887B (en) | Shaftless hydrogen-rich gas burner | |
| CN111664451A (en) | Low-heat value gas burner with heat storage stable flame cone | |
| CN208108090U (en) | A kind of ultralow nitrogen metal fiber surface combustor | |
| CN101220954A (en) | Combustor and combustion method for pure burning blast furnace gas or low-calorific value gas | |
| CN217302790U (en) | Ammonia-hydrogen mixed burner | |
| CN103123109B (en) | Gasification combustor of solid fuel cooking range | |
| WO2019011346A1 (en) | Stable and environmentally friendly combustion method for biomass gasification combustible gas, and environmentally friendly combustion chamber | |
| CN212339283U (en) | Pre-mixing device for waste gas and liquid in front of furnace | |
| CN210165377U (en) | Energy-saving low-nitrogen combustor and energy-saving low-nitrogen combustion system | |
| CN209605154U (en) | A kind of low heat value gas combustion burner | |
| CN212929997U (en) | Burner of low NOx tail gas incinerator | |
| KR101471636B1 (en) | Pellet Combustion Device and Method for Low-Emission | |
| CN218443373U (en) | Flue gas heating system applied to double-flue SCR | |
| CN214536344U (en) | Oil-water mixed combustion energy-saving environment-friendly furnace | |
| CN211290044U (en) | Dilute phase premixing burner | |
| CN214172212U (en) | Cooling flame low-nitrogen combustion device | |
| CN216897292U (en) | Novel energy-saving environment-friendly burner | |
| CN216431714U (en) | Combustion head with flue gas internal circulation ultralow nitrogen NOx content less than or equal to 50mg | |
| CN112240545B (en) | Low-nitrogen combustor, combustor assembly and low-nitrogen combustor system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |