Multi-fuel composite burner

Abstract

The invention discloses a multi-fuel composite burner, which is applied to the technical field of fuel burners, and is characterized in that the multi-fuel composite burner comprises a fuel barrel with one closed end and a flame nozzle coaxially and fixedly connected to the open end of the fuel barrel; an inner flange partition plate and an outer flange partition plate are coaxially and fixedly connected in the fuel barrel from inside to outside in sequence, a mounting disc is coaxially and fixedly connected to the end, close to the flame nozzle, of the inner flange partition plate, and an ultrasonic atomization assembly used for atomizing liquid fuel is coaxially and fixedly connected to the center position of the mounting disc. A plurality of nozzle assemblies allowing combustion gas to be sprayed out and at least one igniter used for ignition are evenly and fixedly connected to the installation disc in the circumferential direction, and a rotational flow disc used for guiding combustion air to form rotational flow is coaxially and fixedly connected between the tail end, close to the flame spraying opening, of the outer flange partition plate and the fuel barrel. The method has the technical effects that the adaptability to fuel and the tolerance are high.

Description

Technical Field

[0001] The invention relates to the technical field of fuel burners, in particular to a multi-fuel composite burner. Background Art

[0002] In the field of industrial production and energy utilization, the performance of combustion equipment is crucial to production efficiency, energy consumption and environmental protection. With the diversified development of energy structure, the disadvantages of traditional single-fuel burners are becoming increasingly prominent: on the one hand, traditional burners can only adapt to a single type of fuel, and lack flexibility in the face of differences in energy supply in different regions and diverse fuel needs of users. For example, in some areas with unstable natural gas supply, burners that only burn natural gas cannot switch to other fuels, resulting in reduced energy supply reliability and easy production interruptions; on the other hand, traditional burners have strict requirements on fuel quality. When the fuel composition and calorific value fluctuate, such as the sulfur content and calorific value of coal, the combustion efficiency will drop significantly, and unstable combustion may occur, which seriously affects the normal production and increases energy waste and production costs.

[0003] In addition, with environmental protection requirements becoming increasingly stringent, traditional single-fuel burners find it difficult to achieve clean and efficient use of energy. Their incomplete combustion will produce a large amount of pollutants, such as particulate matter and sulfur dioxide from coal combustion, which cannot meet the requirements of environmental protection regulations.

[0004] In summary, existing traditional burners have obvious deficiencies in fuel adaptability, tolerance to fuel quality, and environmental protection performance. It is urgent to develop a new type of multi-fuel composite burner to solve the above technical problems and meet the new needs of industrial production and energy utilization. Summary of the invention

[0005] The object of the present invention is to provide a multi-fuel compound burner, which has the advantages of strong adaptability and tolerance to fuel.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a multi-fuel composite burner, comprising a fuel cartridge closed at one end and a flame nozzle coaxially fixedly connected to the open end of the fuel cartridge; an inner flange partition and an outer flange partition are coaxially fixedly connected in sequence from the inside to the outside in the fuel cartridge, the inner flange partition and the outer flange partition divide the fuel cartridge into a gas fuel supply chamber, an ignition gas supply chamber and a combustion air supply chamber from the inside to the outside, an end of the inner flange partition close to the flame nozzle is coaxially fixedly connected to a mounting plate, an ultrasonic atomization assembly for atomizing liquid fuel is coaxially fixedly connected to the center position of the mounting plate, a plurality of nozzle assemblies for ejecting combustion gas and at least one igniter for ignition are evenly fixedly connected to the mounting plate along a circumferential direction, a swirl disk for guiding the combustion air to form a swirl is coaxially fixedly connected between the end of the outer flange partition close to the flame nozzle and the fuel cartridge.

[0007] The present invention is further configured as follows: the ultrasonic atomization assembly includes a mounting sleeve coaxially fixedly connected to the mounting plate and a liquid supply pipe coaxially inserted and fixedly connected to the mounting sleeve for supplying liquid fuel; the mounting sleeve is coaxially fixedly connected at the end near the flame nozzle with an atomizing nozzle for atomizing the liquid fuel.

[0008] The present invention is further configured as follows: the nozzle assembly includes a plurality of spray holes fixedly connected to the mounting plate along a circumferential direction and a plurality of nozzle blocks fixedly connected to the spray holes, an air intake pipe connected to the gas fuel supply chamber is coaxially provided on the nozzle block, and a plurality of nozzle holes connected to the air intake pipe and used for spraying gas to all sides are evenly arranged on the nozzle block.

[0009] The present invention is further configured such that the number of the nozzle blocks is not greater than the number of the nozzle holes, and the distribution shape and gas density of the gas fuel entering the flame nozzle are controlled based on adjusting the number and arrangement of the nozzle holes.

[0010] The present invention is further configured as follows: the swirl disk includes a disk body and a stepped mounting hole opened at the center of the disk body for stably mounting the disk body to the end of the outer flange partition; the flame nozzle is based on a sealing flange assembly to crimp and fix the disk body to the end of the flange partition; the disk body is evenly provided with a plurality of inclined air bleed holes whose center lines are inclined relative to the center line of the disk body along the circumferential direction.

[0011] The present invention is further configured as follows: the center line of the inclined air ducting hole is inclined between 10 and 45 degrees relative to the center line of the disk body, and the swirl angle of the air swirl entering the flame nozzle is controlled based on replacing different swirl disks, and the intensity of the air swirl entering the flame nozzle is controlled based on changing the diameter and number of the inclined air ducting holes.

[0012] The present invention is further configured as follows: the sealing flange assembly includes a first flange coaxially fixedly connected to the open end of the fuel cylinder and a second flange coaxially fixedly connected to the flame nozzle, a sealing gasket is provided between the first flange and the second flange, a plurality of locking screws are evenly fixedly connected to the second flange along the circumferential direction, a locking hole matching the locking screw is provided on the first flange, and a locking nut is provided on the locking screw.

[0013] The present invention is further configured as follows: a gas fuel supply pipe for connecting to the gas fuel supply chamber, an ignition gas supply pipe for connecting to the ignition gas supply chamber, and a combustion air supply pipe for connecting to the combustion air supply chamber are respectively fixedly connected to the fuel cylinder, and at least one gas fuel supply pipe is provided.

[0014] The present invention is further configured as follows: the closed end of the fuel cartridge is also fixedly connected to a flame scanner tube extending to the mounting plate for scanning the flame in the flame nozzle, and an observation hole for observing the flame is also provided.

[0015] The present invention is further configured such that the gaseous fuel uses natural gas or waste gas, and the liquid fuel uses fuel oil, waste oil or waste liquid.

[0016] In summary, the present invention has the following beneficial effects: 1. By using an inner flange partition and an outer flange partition, the fuel cylinder is divided into a gas fuel supply chamber, an ignition gas supply chamber and a combustion air supply chamber from the inside to the outside, and at least one gas fuel supply pipe is arranged on the gas fuel supply chamber. During the combustion process, the gas combustion enters the fuel cylinder through the gas fuel supply pipe and is ejected by the nozzle assembly. The liquid fuel is atomized by the ultrasonic atomization assembly and then discharged into the flame nozzle. The ignition gas is discharged from the ignition gas supply chamber into the flame nozzle. The swirl disk causes the combustion air to swirl, promotes the full mixing of the fuel and the air, and improves the combustion efficiency. When the fuel is mixed, a high-voltage electric spark is generated through the igniter, thereby The ignition gas is ignited and then the main fuel is ignited, thereby achieving the ability to burn one or two liquid or gaseous fuels, or even waste gas, waste liquid, etc., which greatly expands the scope of fuel use, reduces dependence on specific fuels, improves the versatility and flexibility of the equipment, and can also adapt to inferior fuels and waste fuels. It has better adaptability to fluctuations in fuel composition and calorific value, ensures stable operation under different fuel supply conditions, improves production continuity and reliability, and can achieve precise control of the combustion process by adjusting parameters such as the fuel supply and combustion air flow rate, pressure, and swirl rate of the swirl body to meet the combustion requirements under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of this embodiment; Figure 2 It is a schematic diagram of the overall structure explosion of this embodiment; Figure 3 is a cross-sectional view of the overall structure of this embodiment; Figure 4 is a schematic structural diagram of the nozzle block of this embodiment; Figure 5 Schematic diagram of the structure of the swirl disk of this embodiment.

[0018] Figure numerals: 1. fuel cylinder; 14. gas fuel supply pipe; 15. ignition gas supply pipe; 16. combustion air supply pipe; 2. flame nozzle; 3. inner flange partition; 31. mounting plate; 4. outer flange partition; 5. gas fuel supply chamber; 6. ignition gas supply chamber; 7. combustion air supply chamber; 8. ultrasonic atomization assembly; 81. mounting sleeve; 82. liquid supply pipe; 83. atomization nozzle; 9. nozzle assembly; 91. spray hole; 92. nozzle block; 93. air inlet pipe; 94. nozzle hole; 10. igniter; 11. swirl disk; 111. disk body; 112. stepped mounting hole; 113. sealing flange assembly; 114. inclined air inlet hole; 115. first flange; 116. second flange; 117. sealing gasket; 118. locking screw; 119. locking nut; 12. flame scanner tube. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0020] Example: refer to Figures 1 to 5 A multi-fuel composite burner comprises a fuel cartridge 1 closed at one end and a flame nozzle 2 coaxially fixedly connected to the open end of the fuel cartridge 1, an inner flange partition 3 and an outer flange partition 4 are coaxially fixedly connected in sequence from the inside to the outside in the fuel cartridge 1, the inner flange partition 3 and the outer flange partition 4 divide the fuel cartridge 1 into a gas fuel supply chamber 5, an ignition gas supply chamber 6 and a combustion air supply chamber 7 from the inside to the outside in sequence, a gas fuel supply pipe 14 for connecting the gas fuel supply chamber 5, an ignition gas supply pipe 15 for connecting the ignition gas supply chamber 6 and a combustion air supply pipe 16 for connecting the combustion air supply chamber 7 are respectively fixedly connected to the fuel cartridge 1, the gas fuel supply pipe 14 is provided with at least one for introducing a variety of gas fuels or gaseous wastes into the gas fuel supply chamber 5, a mounting plate 31 is coaxially fixedly connected to one end of the inner flange partition 3 close to the flame nozzle 2, and an ultrasonic atomizer for atomizing liquid fuel is coaxially fixedly connected to the center position of the mounting plate 31 The ultrasonic atomization component 8 atomizes the liquid fuel through the ultrasonic atomization component 8. Compared with the traditional atomization method, the liquid fuel can be atomized more fully and mixed with the air more evenly, thereby improving the combustion efficiency and reducing pollutant emissions. A plurality of nozzle assemblies 9 for ejecting combustion gas and at least one igniter 10 for ignition are evenly fixedly connected on the mounting plate 31 along the circumferential direction. A swirl disk 11 for guiding the combustion air to form a swirl is coaxially fixedly connected between the end of the outer flange partition 4 close to the flame nozzle 2 and the fuel barrel 1. The swirl disk 11 causes the combustion air to swirl, which promotes the full mixing of the fuel and the air and improves the combustion efficiency. A flame scanner tube 12 is also fixedly connected to the closed end of the fuel barrel 1 and extends to the mounting plate 31 for scanning the flame in the flame nozzle 2. At the same time, an observation hole for observing the flame is also provided. The flame scanner tube 12 and the observation hole are used to accurately control the current combustion process to meet the combustion requirements under different working conditions. In this embodiment, the gas fuel uses natural gas or waste gas, and the liquid fuel uses fuel oil, waste oil or waste liquid.

[0021] refer to Figure 1 to Figure 2Specifically, the ultrasonic atomization assembly 8 includes a mounting sleeve 81 coaxially fixedly connected to the mounting plate 31 and a liquid supply pipe 82 coaxially inserted and fixedly connected to the mounting sleeve 81 for supplying liquid fuel. The mounting sleeve 81 is coaxially fixedly connected at the end near the flame nozzle 2 with an atomization nozzle 83 for atomizing the liquid fuel. The atomization nozzle 83 realizes the atomization of the liquid by superimposing ultrasonic waves generated at the wave crest through the diffraction principle generated when the liquid passes through the gap. Compared with the traditional atomization method, the liquid fuel can be atomized more fully and mixed with the air more evenly, thereby improving the combustion efficiency and reducing pollutant emissions.

[0022] refer to Figure 2 and Figure 4 Specifically, the nozzle assembly 9 includes a plurality of spray holes 91 fixedly connected to the mounting plate 31 along the circumferential direction and a plurality of nozzle blocks 92 fixedly connected to the spray holes 91. An air intake pipe 93 connected to the gas fuel supply chamber 5 is coaxially provided on the nozzle block 92. A plurality of nozzle holes 94 connected to the air intake pipe 93 and used for spraying gas to the surroundings are evenly arranged on the nozzle block 92. The gas enters the air intake pipe 93 and is discharged to the surroundings from the nozzle holes 94, thereby increasing the distribution area of ​​the gas fuel and the fullness of the gas fuel combustion. The number of nozzle blocks 92 is not higher than the number of spray holes 91. Based on adjusting the number of nozzle holes 94, the number of nozzle blocks 92 is not greater than the number of spray holes 91. The amount and arrangement of the nozzle holes 94 can control the distribution shape and gas density of the gas fuel entering the flame nozzle 2. When the nozzle block 92 is not installed in the nozzle hole 91, the gas is discharged in a straight line through the nozzle, the gas discharge rate is high, and the total amount of discharged gas is large. When the nozzle block 92 is installed, the gas is discharged in a scattered form, and the density and total amount of the discharged gas are low. By adjusting the number and arrangement of the nozzle holes 94, the shape and gas density of the combustion gas entering the flame nozzle 2 can be directly adjusted so that the gas fuel can be fully mixed with the air while also having a sufficient amount of combustion gas to mix with the air, thereby improving the combustion speed and increasing the consumption rate of the exhaust gas.

[0023] refer to Figure 2 and Figure 5Specifically, the swirl disk 11 includes a disk body 111 and a stepped mounting hole 112 opened at the center of the disk body 111 for stably mounting the disk body 111 to the end of the outer flange partition 4. The disk body 111 is crimped and fixed to the end of the flange partition based on the sealing flange assembly 113 at the flame nozzle 2. A plurality of inclined air intake holes 114 with center lines inclined relative to the center line of the disk body 111 are evenly opened along the circumferential direction of the disk body 111. When the combustion air is discharged from the inclined air intake holes 114, it is discharged at an inclined angle, so that a swirl is generated when the combustion air enters the flame nozzle 2, which promotes full mixing of fuel and air and improves combustion efficiency. The center line of the inclined air intake hole 114 is inclined between 10 and 45 degrees relative to the center line of the disk body 111. The swirl angle of the air swirl entering the flame nozzle 2 is controlled based on replacing different swirl disks 11, and the swirl angle of the air swirl entering the flame nozzle 2 is controlled based on changing the inclination. The diameter and number of the oblique air holes 114 are used to control the intensity of the air swirl entering the flame nozzle 2, so that the swirl intensity of the combustion air can be adjusted according to actual combustion requirements, the mixing effect of fuel and air can be optimized, and the stability and efficiency of combustion can be further improved. The sealing flange assembly 113 includes a first flange 115 coaxially fixedly connected to the open end of the fuel cartridge 1 and a second flange 116 coaxially fixedly connected to the flame nozzle 2. A sealing gasket 117 is provided between the first flange 115 and the second flange 116. The second flange 116 is evenly and fixedly connected with a plurality of locking screws 118 along the circumferential direction. A locking hole cooperating with the locking screw 118 is provided on the first flange 115, and a locking nut 119 is provided on the locking screw 118. By disassembling and assembling the locking nut 119, the flame nozzle 2 can be quickly disassembled and assembled to achieve replacement of the swirl disk 11.

[0024] Brief description of the use process: During the combustion process, the gas combustion enters the fuel cylinder 1 through the gas fuel supply pipe 14 and is ejected by the nozzle assembly 9. The liquid fuel is atomized by the ultrasonic atomization assembly 8 and then discharged into the flame nozzle 2. The ignition gas is discharged from the ignition gas supply chamber 6 to the flame nozzle 2. The swirl disk 11 causes the combustion air to swirl, promotes the full mixing of fuel and air, and improves the combustion efficiency. After the fuel is mixed, a high-voltage electric spark is generated through the igniter 10 to ignite the ignition gas and then ignite the main fuel, thereby achieving the ability to burn one or two liquid or gas fuels, or even waste gas, waste liquid, etc., which greatly expands the scope of fuel use and reduces dependence on specific fuels.

[0025] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make creative modifications to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it will be protected by the patent law.

Claims

1. A multi-fuel composite burner, comprising a fuel cartridge (1) with one end closed and a flame nozzle (2) coaxially fixedly connected to the open end of the fuel cartridge (1); characterized in that: An inner flange partition (3) and an outer flange partition (4) are coaxially fixedly connected in sequence from the inside to the outside of the fuel barrel (1); the inner flange partition (3) and the outer flange partition (4) divide the fuel barrel (1) into a gas fuel supply chamber (5), an ignition gas supply chamber (6) and a combustion air supply chamber (7) in sequence from the inside to the outside; an end of the inner flange partition (3) close to the flame nozzle (2) is coaxially fixedly connected to a mounting plate (31); an ultrasonic atomizing assembly (8) for atomizing liquid fuel is coaxially fixedly connected to the center of the mounting plate (31); a plurality of nozzle assemblies (9) for ejecting combustion gas and at least one igniter (10) for ignition are evenly fixedly connected to the mounting plate (31) along the circumferential direction; a swirl disk (11) for guiding combustion air to form a swirl is coaxially fixedly connected between the end of the outer flange partition (4) close to the flame nozzle (2) and the fuel barrel (1).

2. A multi-fuel composite burner according to claim 1, characterized in that: The ultrasonic atomization assembly (8) comprises a mounting sleeve (81) coaxially fixedly connected to the mounting plate (31) and a liquid supply pipe (82) coaxially inserted and fixedly connected to the mounting sleeve (81) for supplying liquid fuel; the mounting sleeve (81) is coaxially fixedly connected at its end near the flame nozzle (2) with an atomization nozzle (83) for atomizing the liquid fuel.

3. A multi-fuel composite burner according to claim 1, characterized in that: The nozzle assembly (9) comprises a plurality of spray holes (91) fixedly connected to the mounting plate (31) along a circumferential direction and a plurality of nozzle blocks (92) fixedly connected to the spray holes (91); an air intake pipe (93) connected to the gas fuel supply chamber (5) is coaxially provided on the nozzle block (92); and a plurality of nozzle holes (94) connected to the air intake pipe (93) and used for spraying gas in all directions are evenly arranged on the nozzle block (92).

4. A multi-fuel composite burner according to claim 3, characterized in that: The number of the nozzle blocks (92) is not greater than the number of the nozzle holes (91), and the distribution shape and gas density of the gas fuel entering the flame nozzle (2) are controlled by adjusting the number and arrangement of the nozzle holes (94).

5. A multi-fuel composite burner according to claim 1, characterized in that: The swirl disk (11) comprises a disk body (111) and a stepped mounting hole (112) opened at the center of the disk body (111) for stably mounting the disk body (111) to the end of the outer flange partition (4); the flame nozzle (2) is based on a sealing flange assembly (113) to realize the pressing and fixing of the disk body (111) to the end of the flange partition; the disk body (111) is evenly opened with a plurality of inclined air intake holes (114) along the circumferential direction, the center line of which is inclined relative to the center line of the disk body (111).

6. A multi-fuel composite burner according to claim 5, characterized in that: The center line of the inclined air bleed hole (114) is inclined at a degree between 10 and 45 relative to the center line of the disk body (111), and the swirl angle of the air swirl entering the flame nozzle (2) is controlled by replacing different swirl disks (11), and the intensity of the air swirl entering the flame nozzle (2) is controlled by changing the diameter and number of the inclined air bleed holes (114).

7. A multi-fuel composite burner according to claim 6, characterized in that: The sealing flange assembly (113) comprises a first flange (115) coaxially fixedly connected to the open end of the fuel cylinder (1) and a second flange (116) coaxially fixedly connected to the flame nozzle (2), a sealing gasket (117) is arranged between the first flange (115) and the second flange (116), a plurality of locking screws (118) are evenly fixedly connected to the second flange (116) along the circumferential direction, a locking hole matching with the locking screw (118) is provided on the first flange (115), and a locking nut (119) is provided on the locking screw (118).

8. A multi-fuel composite burner according to claim 1, characterized in that: The fuel cylinder (1) is respectively fixedly connected with a gas fuel supply pipe (14) for communicating with the gas fuel supply chamber (5), an ignition gas supply pipe (15) for communicating with the ignition gas supply chamber (6), and a combustion air supply pipe (16) for communicating with the combustion air supply chamber (7), and at least one gas fuel supply pipe (14) is provided.

9. A multi-fuel composite burner according to claim 2, characterized in that: The closed end of the fuel cartridge (1) is also fixedly connected to a flame scanner tube (12) extending to the mounting plate (31) for scanning the flame in the flame nozzle (2), and is also provided with an observation hole for observing the flame.

10. A multi-fuel composite burner according to any one of claims 1 to 9, characterized in that: Gaseous fuel uses natural gas or waste gas, and liquid fuel uses fuel oil, waste oil or waste liquid.

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