CN114992637A - Low-nitrogen burner capable of improving combustion-supporting efficiency - Google Patents

Abstract

The invention discloses a low-nitrogen combustor capable of improving combustion-supporting efficiency, which comprises a shell, wherein one side of the shell is fixedly connected with an annular frame and a pipe body which are communicated with each other, the bottom inside the shell is provided with an air inducing device, the bottom of the annular frame is provided with a mounting seat, one side of the inner side of the pipe body is provided with an annular concave layer, one end of the annular concave layer is fixedly connected with four groups of conical baffles, and one side of the four groups of conical baffles is provided with an inner-layer gas spray pipe; the invention uses the connection of the first exhaust port, the second exhaust port and the heat dissipation exhaust port on the end surfaces of the outer layer air guide cavity and the inner layer air guide cavity as an exhaust system to promote the gas to be uniformly exhausted into the peripheral inner ring sprayed by the fuel gas, thereby ensuring the contact rate of the fuel gas and the oxygen and improving the combustion-supporting efficiency of the fuel gas.

Description

Low-nitrogen burner capable of improving combustion-supporting efficiency

Technical Field

The invention relates to the technical field of burners, in particular to a low-nitrogen burner capable of improving combustion-supporting efficiency.

Background

The low-nitrogen burner is an industrial device which is commonly used in industrial production and uses combustible gas to burn and heat materials or heat reaction, the emission of the low-nitrogen burner is mainly nitrogen oxide, the nitrogen oxide enters a human respiratory system through breathing to cause bronchitis or lung diseases and harm human health, and the nitrogen oxide and other pollutants in the atmosphere are subjected to photochemical reaction to form photochemical smog with great toxicity to pollute the environment.

When the burner operates, low-nitrogen combustion is generally carried out by combining oxygen injection and gas, however, the flow of the injected oxygen is difficult to guide and control and is not easy to be uniformly mixed with the gas, thereby reducing the controllability of the emission of nitrogen oxides, and when the oxygen is combined with the gas for combustion supporting along with the guide, if the oxygen concentration is higher, the reaction retention time is longer, the temperature compatibility of the oxygen and the gas is worsened, thereby reducing the parameter precision of the gas combustion, promoting the emission process of the nitrogen oxides to be obstructed, and the flame is more concentrated during the combustion, causing the combustion temperature at the center of the end surface of the burner to be overlarge, further causing the emission of combustion compounds to be easily overproof, and polluting the environment.

Disclosure of Invention

The present invention is directed to a low-nitrogen burner capable of improving combustion efficiency, so as to solve the problems related to the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a can improve low NOx burner of combustion-supporting efficiency, includes the casing, one side of casing rigid coupling respectively has the ring frame and the body of mutual intercommunication, the inside bottom of casing is equipped with the induced air device, the bottom of ring frame is equipped with the mount pad, the concave layer of annular has been seted up to the inboard one side of body, the one end rigid coupling of the concave layer of annular has four groups of toper baffles, four groups one side of toper baffle is equipped with inlayer gas spray tube, ring frame and the inside axle center punishment of body do not are equipped with inlayer air guide chamber and gas guide tube assembly, one side in the gas guide tube assembly outside is equipped with the gas distributor and the gas shunt tubes of mutual intercommunication respectively, one side in inlayer air guide chamber is equipped with the heat dissipation gas vent of mutual intercommunication, one side of gas shunt tubes is equipped with the outer gas spray tube of mutual intercommunication.

Preferably, one side of the inner side of the annular frame is provided with a preheating air guide assembly, the preheating air guide assembly comprises an annular cavity, an outer air guide cavity, spiral guide rods, guide ports, annular electric heating wires, a first exhaust port and a second exhaust port, the annular cavity is located on one side of the inner side of the annular frame, the edge of the inner side of the annular cavity is provided with the annular electric heating wires, four groups of outer air guide cavities are arranged on the outer side of the inner side of the pipe body close to the inner air guide cavity, the spiral guide rods are arranged on one side of the inner side of the outer air guide cavities, the first exhaust port and the second exhaust port which are communicated with each other are arranged on one side of the outer air guide cavities, and the guide ports which are opposite to the horizontal plane of the annular cavity are arranged on the other side of the outer air guide cavities and one side of the inner air guide cavities.

Preferably, the inside of mount pad is equipped with temperature controller, and temperature controller and annular electric heating wire control connection, the inboard of annular frame is equipped with the heat preservation, and the outside that the mouth was drawn in the heat preservation parcel connecing.

Preferably, the inner side of the pipe body is provided with an annular sound-absorbing plate, one side of the annular sound-absorbing plate is of an inclined structure, and one side of the inclined structure, which is protruded, is uniformly provided with a noise reduction net.

Preferably, outer gas spray tube and inlayer gas spray tube all are four groups, four groups outer gas spray tube is oblique type structure, four groups there is the clearance between inlayer gas spray tube and the toper baffle, the air exit and the clearance of heat dissipation gas vent correspond each other.

Preferably, four groups of fan-shaped through openings are formed in the inner layer of the annular concave layer, and the fan-shaped through openings are correspondingly matched with the heat dissipation exhaust port.

Preferably, the annular cavity is respectively communicated with the outer-layer air guide cavity and the inner-layer air guide cavity through the connecting and guiding ports, and the five groups of the connecting and guiding ports are in conical structures and are positioned between the annular cavity and the outer-layer air guide cavity as well as between the inner-layer air guide cavity.

Preferably, one side of each of the four outer air guide cavities is provided with an inclined air guide tube, and the four first exhaust ports and the four second exhaust ports are positioned on the outer side surface and the side surface of the inclined air guide tube.

Preferably, four groups the first exhaust port corresponds with outer layer gas spray pipe direction, four groups the second exhaust port corresponds with inlayer gas spray pipe direction, four groups the inboard of first exhaust port and second exhaust port all is equipped with arc air guide plate.

Preferably, one side of each of the four groups of spiral guide rods is provided with a fixed rod, the fixed rods are fixedly connected with the outer-layer air guide cavity, and the four groups of spiral guide rods correspond to the horizontal plane of the inner communication part of the four groups of guide connecting ports.

Compared with the prior art, the invention provides the low-nitrogen combustor capable of improving combustion-supporting efficiency, and the low-nitrogen combustor has the following beneficial effects:

1. the invention uses the connection of the first exhaust port, the second exhaust port and the heat dissipation exhaust port on the end surfaces of the outer air guide cavity and the inner air guide cavity as an exhaust system to promote the gas to be uniformly exhausted into the outer inner ring of the sprayed gas, thereby ensuring the contact rate of the gas and the oxygen and improving the combustion efficiency of the gas.

2. The invention utilizes the mutual cooperation of the preheating gas guide components to promote the oxygen to be heated under the cooperation of the annular electric heating wires before entering the guide port, the outer gas guide cavity and the inner gas guide cavity for graded guide, thereby leading the heated oxygen to be led out of the outer layer surface of the pipe body in a spiral system under the guide of the spiral guide rod so as to control the concentration content and the guide flow of the oxygen, improving the temperature compatibility of fuel gas and oxygen, further improving the mixed combustion-supporting efficiency of the fuel gas and the oxygen, strengthening the heat dissipation surface of the central eruption combustion temperature of the pipe body by utilizing the gaps formed by the heat dissipation exhaust ports among the four groups of conical baffles and the concave surface of the annular concave layer, layering the combustion surfaces of the fuel gas, avoiding the over concentration of flame, increasing the controllability of the combustion discharge amount of nitrogen oxides of the device, facilitating the acquisition of the optimal parameters of the combustion temperature, and preventing the discharge amount of the nitrogen oxides from exceeding the standard, causing environmental pollution.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a front cross-sectional view of the present invention;

FIG. 3 is an enlarged view taken at A of FIG. 2 according to the present invention;

FIG. 4 is a side view of the tube of the present invention;

FIG. 5 is a side view of the annular chamber of the present invention;

fig. 6 is a perspective view of a conical baffle of the present invention.

In the figure: 1. a housing; 2. a mounting seat; 3. an annular frame; 4. a pipe body; 5. an air inducing device; 6. an annular cavity; 7. a gas guide tube assembly; 8. an outer gas-conducting cavity; 9. a helical guide rod; 10. a lead-in port; 11. an annular electric heating wire; 12. an inner-layer gas-conducting cavity; 13. a first exhaust port; 14. a second exhaust port; 15. an outer layer gas spray pipe; 16. an annular concave layer; 17. an inner layer gas spray pipe; 18. a gas shunt pipe; 19. a heat dissipation exhaust port; 20. a gas distributor; 21. a conical baffle.

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.

Referring to fig. 1-6, the present invention provides a technical solution: a low-nitrogen combustor capable of improving combustion-supporting efficiency comprises a shell 1, wherein one side of the shell 1 is fixedly connected with an annular frame 3 and a pipe body 4 which are communicated with each other, an air inducing device 5 is arranged at the bottom inside the shell 1, a mounting seat 2 is arranged at the bottom of the annular frame 3, an annular concave layer 16 is arranged at one side of the inner side of the pipe body 4, one end of the annular concave layer 16 is fixedly connected with four groups of conical baffles 21, inner-layer gas spray pipes 17 are arranged at one sides of the four groups of conical baffles 21, an inner-layer gas guide cavity 12 and a gas guide pipe assembly 7 are respectively arranged at the axle center inside the annular frame 3 and the pipe body 4, a gas distributor 20 and a gas shunt pipe 18 which are communicated with each other are respectively arranged at one side of the outer side of the gas guide pipe assembly 7, a heat dissipation exhaust port 19 which is communicated with each other is arranged at one side of the inner-layer gas guide cavity 12, and an outer-layer gas spray pipe 15 which is communicated with each other is arranged at one side of the gas shunt pipe 18.

As a preferable embodiment of the present embodiment: one side of 3 inboards of ring frame is equipped with preheats the air guide subassembly, and preheat the air guide subassembly and include annular chamber 6 respectively, outer air guide chamber 8, spiral guide rod 9, connect and lead mouth 10, annular electric heating wire 11, first exhaust port 13 and second exhaust port 14, annular chamber 6 is located 3 inboard one sides of ring frame, the edge of annular chamber 6 inboard is equipped with annular electric heating wire 11, four outer air guide chambers 8 of group have been seted up to the inboard outside that is close to inner air guide chamber 12 of body 4, four outer air guide chamber 8 inboard one sides of group are equipped with spiral guide rod 9, four outer air guide chamber 8 of group's one side is equipped with first exhaust port 13 and second exhaust port 14 that communicate each other respectively, four outer air guide chamber 8 of group's opposite side and inner air guide chamber 12 of group's one side all are equipped with and connect and lead mouth 10 relative with annular chamber 6 horizontal planes.

As a preferable embodiment of the present embodiment: the inside of mount pad 2 is equipped with temperature controller, and temperature controller and 11 control connection of annular electric heating wire, and the inboard of annular frame 3 is equipped with the heat preservation, and the outside of heat preservation parcel pigtail mouth 10, and the follow-up combustion-supporting efficiency of oxygen is improved to the preheating temperature of oxygen in the controlling means of being convenient for.

As a preferable aspect of the present embodiment: the inboard of body 4 is equipped with annular acoustical panel, and one side of annular acoustical panel is the oblique type structure arch, and the protruding one side of oblique type structure evenly is equipped with and falls the net of making an uproar, is convenient for through the outer system of annular acoustical panel and fall mutually supporting of the net of making an uproar, eliminates the noise that produces the inside gas water conservancy diversion of device and function and alleviates, increases the stationarity that the device operated.

As a preferable embodiment of the present embodiment: the outer layer gas spray pipes 15 and the inner layer gas spray pipes 17 are four groups, the four groups of outer layer gas spray pipes 15 are of an inclined structure, gaps exist between the four groups of inner layer gas spray pipes 17 and the conical baffle 21, air outlets of the heat dissipation air outlets 19 correspond to the gaps, the gaps between the heat dissipation air outlets 19 and the conical baffle 21 can be inserted, burning flames are blocked, oxygen is injected into the gaps for supporting combustion of the flames, the combustion rate of gas is improved, and heat dissipation is performed on the centers of the burning flames.

As a preferable embodiment of the present embodiment: four groups of fan-shaped openings are formed in the inner layer of the annular concave layer 16, the fan-shaped openings are correspondingly matched with the heat dissipation exhaust port 19, the fan-shaped openings are conveniently used for increasing the heat dissipation surface of a heat source, the disjunction of a fire source is improved, and flame is prevented from being concentrated mutually.

As a preferable embodiment of the present embodiment: the annular cavity 6 is respectively communicated with the outer-layer air guide cavity 8 and the inner-layer air guide cavity 12 through the connecting guide ports 10, the five groups of connecting guide ports 10 are in a conical structure and are located between the annular cavity 6 and the outer-layer air guide cavity 8 and between the five groups of connecting guide ports 10 and the inner-layer air guide cavity 12, and the flow guide effect of the connecting guide ports 10 and the outer-layer air guide cavity 8 and the inner-layer air guide cavity 12 is improved.

As a preferable embodiment of the present embodiment: one side of the four groups of outer air guide cavities 8 is provided with an inclined air guide tube, and the four groups of first air outlets 13 and the four groups of second air outlets 14 are positioned on the outer side surface and the side surface of the inclined air guide tube, so that oxygen is guided and expanded on the outer surface of the tube body 4 through the inclined air guide tube, and gas is enabled to wrap the combustion surface of gas.

As a preferable embodiment of the present embodiment: the four groups of first exhaust ports 13 correspond to the outer layer gas jet pipe 15 in direction, the four groups of second exhaust ports 14 correspond to the inner layer gas jet pipe 17 in direction, and arc-shaped gas guide plates are arranged on the inner sides of the four groups of first exhaust ports 13 and the inner sides of the four groups of second exhaust ports 14 to promote oxygen to be sprayed and guided, and can be gathered and wrapped on the outer side surface of the pipe body 4 to circularly combust nitrogen oxides.

As a preferable embodiment of the present embodiment: one side of the four groups of spiral guide rods 9 is provided with a fixed rod which is fixedly connected with the outer layer air guide cavity 8, the four groups of spiral guide rods 9 correspond to the horizontal plane of the inner side communication part of the four groups of guide ports 10, and the spiral guide rods 9 can be used for conducting spiral guide on oxygen, so that the flow rate of the air guided in the outer layer air guide cavity is uniform, and the flow rate and the exhaust of the air are more balanced.

In embodiment 1, as shown in fig. 1-2, when oxygen enters the outer layer air guide cavity 8 for guiding along with the guidance of the annular cavity 6 and the guide port 10, the spiral guide rod 9 in the outer layer air guide cavity 8 can guide the oxygen spirally, so as to make the flow rate of the oxygen more uniform, and improve the oxygen backflow rate sprayed from the first exhaust port 13, that is, the nitrogen oxides generated by the combustion of the gas and the oxygen can be recirculated by the spraying of the first exhaust port 13 and the second exhaust port 14, thereby further improving the controllability of the discharge amount of the nitrogen oxides and the environmental protection of the device.

In embodiment 2, as shown in fig. 1 to 3, when the device is used for gas guidance, noise reduction nets uniformly installed at the protrusions of the annular noise reduction plates installed on the outer sides of the four outer air guide chambers 8 of the outer layer can be used for noise reduction, so that noise generated in the internal operation of the device can be reduced, and the guidance of the gas and oxygen can be more stable by using the flow guide of the four outer air guide chambers 8 and the multi-stage spraying of the four outer gas nozzles 15 and the inner gas nozzles 17, so as to further increase the operation stability and stability of the device.

The working principle is as follows: when the device is used, external oxygen can be absorbed by the air inducing device 5 and flows inside the annular cavity 6, during the period, the oxygen is preheated by starting the annular electric heating wire 11, the oxygen is promoted to be communicated with the inner layer air guide cavity 12 through the five groups of connecting guide ports 10 and the outer layer air guide cavity 8, so that the oxygen obtains a layered and uniform guide system, then the fuel gas is guided by the fuel gas guide pipe assembly 7, the fuel gas is promoted to be discharged through the four groups of outer layer fuel gas spray pipes 15 and inner layer fuel gas spray pipes 17 under the shunting of the fuel gas distributor 20 and the fuel gas shunt pipe 18, the oxygen is discharged from the first exhaust port 13 and the second exhaust port 14 by matching the guide of the outer layer air guide cavity 8, so that the oxygen is uniformly contacted and mixed with the fuel gas discharged from the inner layer of the annular concave layer 16, and the oxygen guided by the inner layer air guide cavity 12 seeps out from the gap of the conical baffle 21 through the heat dissipation exhaust port 19, so that the contact rate and the combustion-supporting efficacy of the oxygen and the fuel gas are enlarged, and the gaps and the layered discharge of the four groups of outer layer gas spray pipes 15 and inner layer gas spray pipes 17 are utilized to separate the gas spraying combustion surface, thereby avoiding the over-concentration of flame heat and improving the working efficiency of low-nitrogen combustion of the combustor.

Finally, it should be noted that the above-mentioned contents are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, and that the simple modifications or equivalent substitutions of the technical solutions of the present invention by those of ordinary skill in the art can be made without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A low-nitrogen burner capable of improving combustion efficiency comprises a shell (1), and is characterized in that: an annular frame (3) and a pipe body (4) which are mutually communicated are fixedly connected to one side of the shell (1) respectively, an air inducing device (5) is arranged at the bottom inside the shell (1), a mounting seat (2) is arranged at the bottom of the annular frame (3), an annular concave layer (16) is arranged at one side of the inner side of the pipe body (4), four groups of conical baffles (21) are fixedly connected to one end of the annular concave layer (16), inner-layer gas spraying pipes (17) are arranged at one sides of the four groups of conical baffles (21), an inner-layer gas guide cavity (12) and a gas guide pipe assembly (7) are arranged at the axial centers inside the annular frame (3) and the pipe body (4) respectively, a gas distributor (20) and a gas shunt pipe (18) which are mutually communicated are arranged at one side of the outer side of the gas guide pipe assembly (7) respectively, and a heat radiating exhaust port (19) which is mutually communicated is arranged at one side of the inner-layer gas guide cavity (12), and an outer layer gas spray pipe (15) which is communicated with each other is arranged on one side of the gas shunt pipe (18).

2. The low-nitrogen burner capable of improving combustion efficiency according to claim 1, wherein: one side of the inner side of the annular frame (3) is provided with a preheating air guide assembly, the preheating air guide assembly comprises an annular cavity (6), an outer air guide cavity (8), spiral guide rods (9), a guide connection port (10), annular electric heating wires (11), a first exhaust port (13) and a second exhaust port (14), the annular cavity (6) is located on one side of the inner side of the annular frame (3), the annular electric heating wires (11) are arranged at the edge of the inner side of the annular cavity (6), four groups of outer air guide cavities (8) are arranged on the outer side, close to the inner air guide cavity (12), of the inner side of the tube body (4), the four groups of outer air guide cavities (8) are arranged on one side of the inner side of the outer air guide cavity (8) and are provided with the spiral guide rods (9), the four groups of outer air guide cavities (8) are respectively provided with the first exhaust port (13) and the second exhaust port (14) which are communicated with each other, and the other side of the outer air guide cavity (8) and one side of the inner air guide cavity (12) are provided with the spiral guide rods (6) The horizontal plane is opposite to the lead-in port (10).

3. The low-nitrogen burner capable of improving combustion efficiency according to claim 1, wherein: the inside of mount pad (2) is equipped with temperature controller, and temperature controller and annular electric heating wire (11) control connection, the inboard of annular frame (3) is equipped with the heat preservation, and the heat preservation parcel connects the outside of drawing mouth (10).

4. The low-nitrogen burner capable of improving combustion efficiency according to claim 1, wherein: the inner side of the pipe body (4) is provided with an annular silencing plate, one side of the annular silencing plate is of an inclined structure, and one side of the inclined structure, which is protruded, is uniformly provided with a noise reduction net.

5. The low-nitrogen burner capable of improving combustion efficiency according to claim 1, wherein: outer gas spray tube (15) all are four groups, four groups with inlayer gas spray tube (17) outer gas spray tube (15) are oblique type structure, four groups there is the clearance between inlayer gas spray tube (17) and toper baffle (21), the air exit and the clearance of heat dissipation gas vent (19) correspond each other.

6. The low-nitrogen burner capable of improving combustion efficiency according to claim 1, wherein: four groups of fan-shaped through holes are formed in the inner layer of the annular concave layer (16), and the fan-shaped through holes are correspondingly matched with the heat dissipation exhaust port (19).

7. The low-nitrogen burner capable of improving combustion efficiency according to claim 2, wherein: the annular cavity (6) is respectively communicated with the outer-layer air guide cavity (8) and the inner-layer air guide cavity (12) through the guide connecting port (10), and five groups of guide connecting ports (10) are arranged between the annular cavity (6) and the inner-layer air guide cavity (12) in a conical structure.

8. The low-nitrogen burner capable of improving combustion efficiency according to claim 2, wherein: one side of the four outer-layer air guide cavities (8) is provided with inclined air guide tubes, and the four groups of first air exhaust ports (13) and second air exhaust ports (14) are located on the outer side surfaces and the side surfaces of the inclined air guide tubes.

9. The low-nitrogen burner capable of improving combustion efficiency according to claim 2, wherein: the four groups of first exhaust port (13) correspond to the direction of outer layer gas spray pipe (15), the four groups of second exhaust port (14) correspond to the direction of inner layer gas spray pipe (17), and the four groups of the inner sides of first exhaust port (13) and second exhaust port (14) are all provided with arc-shaped air guide plates.

10. The low-nitrogen burner capable of improving combustion efficiency according to claim 2, wherein: one side of each of the four groups of spiral guide rods (9) is provided with a fixed rod which is fixedly connected with the outer layer air guide cavity (8), and the horizontal planes of the communicated positions of the four groups of spiral guide rods (9) and the inner sides of the four groups of guide connecting ports (10) correspond to each other.

Images