CN114660228A - Fuel droplet combustion system with adjustable combustion intensity - Google Patents
Fuel droplet combustion system with adjustable combustion intensity Download PDFInfo
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- CN114660228A CN114660228A CN202210364352.XA CN202210364352A CN114660228A CN 114660228 A CN114660228 A CN 114660228A CN 202210364352 A CN202210364352 A CN 202210364352A CN 114660228 A CN114660228 A CN 114660228A
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Abstract
The core of the system is the configuration of mixed gas fuel and the adjustment of combustion intensity, and the system is used for scientific research on combustion characteristics in the dynamic change process of the fuel. The system adopts a pressure division method to store propane, oxygen and air in the air storage tank, the air storage tank is used as an air supply source of combustible mixed gas, the distribution of the gas follows the principle of complete combustion of the propane and the oxygen, the air is used as a combustion environment, and the combustion environments of the air with different oxygen ratios can be formed by configuring the air with different oxygen ratios. The combustible mixed gas supplied to the combustor by the gas storage tank is subjected to flow regulation through the throttling and speed regulating action of the needle valve, is finally conveyed to the combustor through the gas path, flows out of the porous medium plate of the combustor, and forms homogeneous stable flame with stepless-adjustable combustion intensity after being ignited.
Description
Technical Field
The invention belongs to the technical field of fuel droplet combustion research, and particularly relates to a fuel droplet combustion system with adjustable combustion intensity.
Background
Fuel oil plays an important role as an industrial fuel in the human industry in production and life. The fuel oil has a wide application range, such as being used for converting heat energy and mechanical energy in an engine so as to provide power, being used for a heating furnace in the steel industry and being used for fuel oil power generation in the electric power industry. The type of fuel used varies from application to application. Fuel combustion, whether supplied as power or heat source, is not one hundred percent thermally efficient, with energy losses and incomplete combustion producing pollutants. Therefore, scientists have been devoted to the development and utilization of fuel oil in order to improve combustion efficiency and reduce pollutant emissions.
Human research on combustion has continued for centuries and its mechanism has not yet been explored. In the past, the research on fuel combustion utilizes advanced testing means, from the analysis of chemical components and physical characteristics to the analysis of luminescence and heat generation characteristics during the combustion, thereby completing the whole process research on the fuel quality. The research on combustion of fuel droplets in the dropping process is few, because the process is the combination of a dynamic process and a combustion chemical process, the process is more complex than a simple combustion process, and the combustion mechanism of the fuel in a dynamic process can be researched, so that the research on the quality of the fuel is enriched. Therefore, it is necessary to design an experimental system capable of realizing the combustion of oil droplets in the dynamic dripping process.
Disclosure of Invention
The technical problem solved by the invention is as follows: the invention provides a fuel droplet combustion system with adjustable combustion intensity, which is suitable for the research of the dynamic combustion characteristics of fuel, and researches the combustion characteristics of the fuel in the dynamic development process under specific physical characteristics by observing combustion information such as a combustion lag phase, brightness, flame color and the like during the combustion in the dynamic dropping process of the fuel droplets by adopting a high-speed optical test means, thereby evaluating the quality of the fuel.
The technical scheme adopted by the invention is as follows: the fuel oil droplet combustion system with adjustable combustion strength comprises an air distribution system, a flow regulating system, a burner and a cooling system, wherein the air distribution system comprises a propane air supply bottle, an oxygen air supply bottle, an air supply bottle and an air storage tank, an air storage tank stop valve is arranged at the bottle mouth of the air storage tank, the bottle mouth of the propane air supply bottle is connected with the air storage tank stop valve of the air storage tank through a propane air bottle stop valve and a propane air supply reducing valve in sequence, the oxygen air supply bottle is connected with the air storage tank stop valve of the air storage tank through the oxygen bottle stop valve and the oxygen air supply reducing valve in sequence, and the air supply bottle is connected with the air storage tank stop valve of the air storage tank through an air bottle stop valve and an air supply reducing valve in sequence;
the flow regulating system comprises a gas storage tank gas supply pressure reducing valve and a needle valve, a gas storage tank stop valve of the gas storage tank is connected with a gas inlet interface of the combustor sequentially through the gas storage tank gas supply pressure reducing valve and the needle valve, and the cooling system is connected with a water inlet interface and a water return interface of the combustor and used for circularly cooling the combustor during working;
the gas distribution system stores propane, oxygen and air in a gas storage tank respectively according to the pressure from low to high through sequential switch operation of each stop valve and a gas supply pressure reducing valve to complete gas distribution operation of combustible mixed gas, the flow regulating system is used for carrying out stepless flow regulation on the combustible mixed gas conveyed to a burner by the gas storage tank, the combustible mixed gas entering the burner forms homogeneous stable flame after being ignited, and fuel oil drops falling from a central pipe are close to the lower part of the flame to complete the oil drop combustion process;
further inject above-mentioned technical scheme, propane gas cylinder stop valve is connected to propane air feed bottle bottleneck, propane gas cylinder stop valve passes through the hose and is connected with propane air feed relief pressure valve, propane air feed relief pressure valve passes through the hose and is connected with gas tank stop valve, oxygen gas feed bottle bottleneck connection oxygen cylinder stop valve, oxygen cylinder stop valve passes through the hose and is connected with oxygen air feed relief pressure valve, oxygen air feed relief pressure valve passes through the hose and is connected with gas tank stop valve, air bottle stop valve is connected with air feed relief pressure valve through the hose, air feed relief pressure valve passes through the hose and is connected with gas tank stop valve, gas tank stop valve passes through the hose and is connected with gas tank air feed relief pressure valve, gas tank air feed relief pressure valve passes through the hose and is connected with the needle valve.
Further inject above-mentioned technical scheme, the combustor includes the combustor cavity, the combustor cavity divide into logical sap cavity and ventilate the chamber, cooling system includes electric pump and water tank, the end cover will lead to the sap cavity closing cap, the interface of intaking is located logical sap cavity one end of intaking, the return water interface is located logical sap cavity return water one end, the interface of intaking is connected with the electric pump, the electric pump draws the cooling water from the water tank, the return water interface is with the through-flow return water case of cooling water, compress tightly fixed porous medium board through gland and housing bolt in the cavity of ventilating, the center tube is sealed from the middle part that ventilates the chamber and lead to the sap cavity and is passed, the one end of ventilating the chamber air inlet is located to the interface of intaking.
Compared with the prior art, the invention has the advantages that:
1. the scheme is a fuel droplet combustion system capable of realizing adjustable combustion strength, and the system is used for combustion research in a dynamic fuel droplet dropping process and provides technical support for fuel quality research;
2. the scheme can realize the adjustment of the combustion intensity, and the flow of the mixed fuel passing through the porous medium plate of the combustor is adjusted through the throttling and speed-adjusting function of the needle valve, so that the effect of adjusting the combustion intensity is achieved;
3. the scheme can manufacture combustion environments with air with different oxygen ratios, three mixed gas fuels of propane, oxygen and air are configured in the air storage tank through a partial pressure method, and the partial pressure method is used for distributing air to ensure that the propane and the oxygen are completely combusted, so that the combustion environments with the air with different oxygen ratios, such as oxygen-poor air environments and oxygen-rich air environments, can be configured with different ratios of the oxygen in the air to form the combustion environments with the air with different oxygen ratios during propane combustion, and technical support is provided for analyzing combustion of fuel oil in the air environments with different oxygen ratios.
Drawings
FIG. 1 is a schematic diagram of the overall system of the present invention.
FIG. 2 is a schematic view showing the operation of the burner of the present invention during combustion.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements" does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.
Referring to fig. 1-2, embodiments of the present invention are described in detail.
The fuel droplet combustion system with adjustable combustion intensity comprises a gas distribution system, a flow regulating system, a combustor and a cooling system.
The gas distribution system comprises a propane gas supply bottle 1, an oxygen gas supply bottle 2, an air gas supply bottle 3 and a gas storage tank 11, a gas storage tank stop valve 10 is arranged at the bottle mouth of the gas storage tank 11, the bottle mouth of the propane gas supply bottle 1 is connected with the gas storage tank stop valve 10 of the gas storage tank 11 through a propane gas bottle stop valve 4 and a propane gas supply pressure reducing valve 9 in sequence, the oxygen gas supply bottle 2 is connected with the gas storage tank stop valve 10 of the gas storage tank 11 through an oxygen gas bottle stop valve 5 and an oxygen gas supply pressure reducing valve 8 in sequence, and the air gas supply bottle 3 is connected with the gas storage tank stop valve 10 of the gas storage tank 11 through an air bottle stop valve 6 and an air gas supply pressure reducing valve 7 in sequence. Specifically, 1 bottleneck connection propane gas cylinder stop valve 4 of propane gas supply bottle, propane gas cylinder stop valve 4 passes through the hose and is connected with propane air feed relief pressure valve 9, propane air feed relief pressure valve 9 passes through the hose and is connected with gas holder stop valve 10, 2 bottleneck connection oxygen cylinder stop valves 5 of oxygen gas supply bottle, oxygen cylinder stop valve 5 passes through the hose and is connected with oxygen air feed relief pressure valve 8, oxygen air feed relief pressure valve 8 passes through the hose and is connected with gas holder stop valve 10, air bottle stop valve 6 is connected to 3 bottlenecks of air gas supply bottle, air bottle stop valve 6 passes through the hose and is connected with air feed relief pressure valve 7, air feed relief pressure valve 7 passes through the hose and is connected with gas holder stop valve 10. In the above, three gas cylinders respectively store three kinds of high-pressure gas, three gas cylinder shutoff valves are used as switches of the three gas cylinders, three pressure reducing valves perform pressure setting of the three kinds of gas during gas distribution by a partial pressure method, a gas storage tank stores combustible mixed gas configured by the partial pressure method, and the gas storage tank shutoff valve is used as a switch of the gas storage tank.
The gas distribution system adopts a partial pressure method to complete gas distribution operation. During gas distribution, propane, oxygen and air are respectively stored in a gas storage tank 11 from low to high through sequential operation of a propane gas cylinder stop valve 4, an oxygen cylinder stop valve 5, an air cylinder stop valve 6, an air supply reducing valve 7, an oxygen supply reducing valve 8, a propane supply reducing valve 9 and a gas storage tank stop valve 10, so that configuration operation of combustible mixed gas is completed.
The flow control system comprises a gas storage tank gas supply pressure reducing valve 12 and a needle valve 13, and a gas storage tank stop valve 10 of the gas storage tank 11 is connected with a gas inlet interface 22 of the combustor sequentially through the gas storage tank gas supply pressure reducing valve 12 and the needle valve 13. Specifically, the gas storage tank stop valve 10 is connected with a gas storage tank gas supply pressure reducing valve 12 through a hose, and the gas storage tank gas supply pressure reducing valve 12 is connected with a needle valve 13 through a hose.
The flow regulating system can perform stepless flow regulation on the combustible mixed gas delivered to the burner by the gas storage tank 11. The gas storage tank gas supply pressure reducing valve 12 performs pressure reduction operation on the combustible mixed gas output by the gas storage tank 11, and the flow stepless regulation of the combustible mixed gas is realized by regulating the opening size of the needle valve 13. When the pressure of the combustible mixed gas in the gas storage tank 11 is lower than the set pressure value of the gas supply pressure reducing valve 12 of the gas storage tank, the gas needs to be distributed again by using a partial pressure method.
The combustor includes combustor cavity 16, combustor cavity 16 divide into logical sap cavity 17 and breather chamber 18, cooling system includes electric pump 15 and water tank 14, end cover 21 will lead to the sap cavity 17 closing cap, intake interface 19 locates logical sap cavity 17 one end of intaking, return interface 20 locates logical sap cavity 17 return water one end, intake interface 19 is connected with electric pump 15, electric pump 15 draws the cooling water from water tank 14, return interface 20's rivers return water tank 14, compress tightly fixed porous medium board 25 through gland 23 and clamp bolt 24 in the breather chamber 18, porous medium board 25 is through the combustible mixture of the micropore outflow that spreads all over on it. A central tube 26 is hermetically passed through the middle of the vent chamber 18 and the vent chamber 17, the central tube 26 is used for passing the dropped fuel droplets, and the central tube 26 and the end cover 21 are welded on the combustor chamber 16 to ensure the sealing of the vent chamber 17 and the vent chamber 18. The air inlet port 22 is disposed at an air inlet end of the ventilation cavity 18.
The burner is the carrier where the combustion ultimately takes place. The combustible mixture entering the burner ventilation cavity 18 flows out through the porous medium plate 25 and forms a homogeneous and stable flame after being ignited. When a fuel droplet burning experiment is carried out, oil droplets drop and then pass through the central pipe 26, and the oil droplets are burnt under the vicinity close to the flame.
The cooling system is connected with a water inlet interface 19 and a water return interface 20 of the combustor, and provides continuous circulating cooling water for the liquid through cavity 17 of the combustor cavity 16, so as to perform circulating cooling on the combustor during operation. The cooling system is used for circularly cooling the combustor during operation. The electric pump 15 draws cooling water from the water tank 14 to the liquid passing chamber 17 of the burner, and the cooling water then flows back to the water tank, and the circulation cooling of the burner is completed in a repeated cycle.
The working principle is as follows:
the gas distribution system adopts a partial pressure method to configure combustible mixed gas, and all stop valves are closed before gas distribution. Firstly, the propane is configured, the propane gas cylinder stop valve 4 is opened, the propane gas supply reducing valve 9 is adjusted to a required pressure value, the gas storage tank stop valve 10 is opened to enable propane in the propane gas supply cylinder 1 to enter the gas storage tank 11, the gas storage tank stop valve 10 and the propane gas cylinder stop valve 4 are closed after the inflation pressure is stable, and the propane configuration is finished. Secondly, according to the principle that propane and oxygen are completely combusted, oxygen higher than propane pressure is configured, the oxygen cylinder stop valve 5 is opened, the oxygen gas supply pressure reducing valve 8 is adjusted to a required pressure value, the gas storage tank stop valve 10 is opened to enable oxygen in the oxygen gas supply cylinder 2 to enter the gas storage tank 11, the gas storage tank stop valve 10 and the oxygen cylinder stop valve 5 are closed after the inflation pressure is stable, and the oxygen configuration is finished. And finally, air with the highest pressure is configured, the air bottle stop valve 6 is opened, the air supply pressure reducing valve 7 is adjusted to a required pressure value, the air storage tank stop valve 10 is opened to enable the air in the air supply bottle 3 to enter the air storage tank 11, the air storage tank stop valve 10 and the air bottle stop valve 6 are closed after the inflation pressure is stable, and the air configuration is finished.
The combustible mixture delivered to the burner by the gas storage tank 11 needs to pass through a flow regulating system. Firstly closing the needle valve 13, then opening the stop valve 10 of the gas storage tank, adjusting the gas supply pressure reducing valve 12 of the gas storage tank to reduce the gas supply pressure, and finally opening the needle valve 13 to adjust the flow of the combustible mixture supplied to the burner to realize the adjustment of the combustion intensity. When the pressure of the combustible mixed gas in the gas storage tank 11 is lower than the set value of the gas supply pressure reducing valve 12 of the gas storage tank, the combustible mixed gas needs to be configured by utilizing the partial pressure method again.
The combustor is a carrier which is finally combusted, the air inlet connector 22 is communicated with combustible mixed gas, the water inlet connector 19 is communicated with cooling water inlet, and the water return connector 20 is communicated with cooling water return. The combustible mixture flowing into the ventilation cavity 18 flows out of the porous medium plate 25, after ignition, a mean value stable flame with adjustable combustion intensity is formed, and during experiment, dropped fuel droplets pass through the central pipe 26 and are combusted nearby below the flame.
In order to prevent the temperature of the combustor from being too high during operation, the combustor is circularly cooled by a cooling system. The cooling medium is water, the electric pump 15 sucks cooling water from the water tank 14, the cooling water is conveyed to the liquid through cavity 17 of the combustor through the water inlet connector 19, and then the cooling water flows back to the water tank 14 through the water return connector 20, and the circular cooling is completed.
The invention adopts a pressure division method to store propane, oxygen and air in the air storage tank, the air storage tank is used as an air supply source of combustible mixed gas, the air distribution follows the principle of complete combustion of propane and oxygen, the air is used as a combustion environment, and the combustion environments of air with different oxygen ratios can be formed by configuring the air with different oxygen ratios; the combustible mixed gas supplied to the combustor by the gas storage tank is subjected to flow regulation through the throttling and speed regulating action of the needle valve, is finally conveyed to the combustor through the gas path, flows out of the porous medium plate of the combustor, and forms homogeneous stable flame with stepless-adjustable combustion intensity after being ignited, so that the gas storage tank is used for scientific research on combustion characteristics in the dynamic change process of fuel. The invention adopts a high-speed optical testing means, researches the combustion characteristics of the fuel in the dynamic development process under specific physical characteristics by observing combustion information such as the combustion lag phase, the brightness, the flame color and the like during the combustion of the fuel droplets in the dynamic dropping process, and further evaluates the quality of the fuel.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (3)
1. Burning intensity adjustable fuel droplet combustion system which characterized in that: the device comprises an air distribution system, a flow regulating system, a burner and a cooling system, wherein the air distribution system comprises a propane air supply bottle (1), an oxygen air supply bottle (2), an air supply bottle (3) and an air storage tank (11), an air storage tank stop valve (10) is arranged at the bottle mouth of the air storage tank (11), the bottle mouth of the propane air supply bottle (1) is connected with the air storage tank stop valve (10) of the air storage tank (11) through a propane air bottle stop valve (4) and a propane air supply reducing valve (9) in sequence, the oxygen air supply bottle (2) is connected with the air storage tank stop valve (10) of the air storage tank (11) through an oxygen bottle stop valve (5) and an oxygen air supply reducing valve (8) in sequence, and the air supply bottle (3) is connected with the air storage tank stop valve (10) of the air storage tank (11) through an air bottle stop valve (6) and an air supply reducing valve (7) in sequence;
the flow regulating system comprises a gas storage tank gas supply pressure reducing valve (12) and a needle valve (13), a gas storage tank stop valve (10) of the gas storage tank (11) is connected with a gas inlet interface (22) of the combustor sequentially through the gas storage tank gas supply pressure reducing valve (12) and the needle valve (13), and the cooling system is connected with a water inlet interface (19) and a water return interface (20) of the combustor and used for circularly cooling the combustor during working;
the distribution system stores propane, oxygen and air into the gas storage tank (11) respectively according to the pressure from low to high through the sequential switch operation of each stop valve and the gas supply reducing valve to finish the distribution operation of combustible mixed gas, the flow regulating system is used for carrying out stepless flow regulation on the combustible mixed gas conveyed to the burner by the gas storage tank (11), the combustible mixed gas entering the burner forms homogeneous stable flame after being ignited, and the fuel oil drops falling from the central pipe (26) finish the oil drop combustion process under the position close to the flame.
2. The fuel droplet combustion system with adjustable combustion intensity of claim 1, wherein: the propane gas bottle stop valve (4) is connected with the opening of the propane gas bottle (1), the propane gas bottle stop valve (4) is connected with the propane gas supply reducing valve (9) through a hose, the propane gas supply reducing valve (9) is connected with the gas storage tank stop valve (10) through a hose, the oxygen gas bottle (2) is connected with the oxygen gas bottle stop valve (5) through a hose, the oxygen gas bottle stop valve (5) is connected with the oxygen gas supply reducing valve (8) through a hose, the oxygen gas supply reducing valve (8) is connected with the gas storage tank stop valve (10) through a hose, the air gas supply bottle (3) is connected with the air bottle stop valve (6) through an opening, the air bottle stop valve (6) is connected with the air gas supply reducing valve (7) through a hose, the air gas supply reducing valve (7) is connected with the gas storage tank stop valve (10) through a hose, the gas storage tank (10) is connected with the gas storage tank stop valve (12) through a hose, the air supply pressure reducing valve (12) of the air storage tank is connected with the needle valve (13) through a hose.
3. The fuel droplet combustion system with adjustable combustion intensity of claim 1, wherein: the burner comprises a burner cavity (16), the burner cavity (16) is divided into a liquid through cavity (17) and a ventilation cavity (18), the cooling system comprises an electric pump (15) and a water tank (14), the end cover (21) covers the liquid through cavity (17), the water inlet interface (19) is arranged at the water inlet end of the liquid through cavity (17), the water return interface (20) is arranged at the water return end of the liquid through cavity (17), the water inlet interface (19) is connected with an electric pump (15), the electric pump (15) sucks cooling water from a water tank (14), a water flow return tank (14) of the return water interface (20), a porous medium plate (25) is pressed and fixed in the ventilation cavity (18) through a gland (23) and a compression bolt (24), the central pipe (26) passes through the middle parts of the ventilation cavity (18) and the liquid passing cavity (17) in a sealing way, and the air inlet interface (22) is arranged at the air inlet end of the ventilation cavity (18).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210364352.XA CN114660228A (en) | 2022-04-07 | 2022-04-07 | Fuel droplet combustion system with adjustable combustion intensity |
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| CN202210364352.XA CN114660228A (en) | 2022-04-07 | 2022-04-07 | Fuel droplet combustion system with adjustable combustion intensity |
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