CN218494979U

CN218494979U - Low-nitrogen gas burner

Info

Publication number: CN218494979U
Application number: CN202222216888.5U
Authority: CN
Inventors: 周鹏飞
Original assignee: Wuxi Pannonio Industrial Equipment Co ltd
Current assignee: Wuxi Pannonio Industrial Equipment Co ltd
Priority date: 2022-08-23
Filing date: 2022-08-23
Publication date: 2023-02-17
Anticipated expiration: 2032-08-23

Abstract

The utility model provides a low nitrogen gas burner relates to combustor technical field, aims at solving current combustor and adopts diffusion formula burning, and gas combustion is not abundant, and flame is concentrated during the burning, the big problem of heating power type nitrogen oxide's formation volume. Including the combustor casing, the front end of combustor casing passes through the outside assembly of rotatory flange fixedly connected with, still install the inside assembly in center in the outside assembly, still install the ignition needle on the inside assembly in center, air door adjustment mechanism is installed to one side of combustor casing, the electric cabinet is installed to the opposite side of combustor casing, and through servo motor and the air door driving shaft direct-connection mode, drive the air door driving shaft and rotate, through the mutual cooperation of hinge and connecting rod, accomplish the rotation regulation of whole wind door plant, realize the upset of wind door plant, reduce the excess oxygen in the combustion process flue gas to reduce nitrogen oxide's formation.

Description

Low-nitrogen gas burner

Technical Field

The utility model relates to a combustor technical field especially relates to a low nitrogen gas burner.

Background

With the rapid development of society, people can be analogized to the turning period from the industrial civilization age to the ecological civilization age. Low-carbon economy is advocated vigorously, and ecological civilization is built. China faces double tasks of industrialization and ecology, and the contradiction between energy demand and environmental pollution is more and more prominent. The new flue gas emission standard reduces the emission of smoke concentration, CO and nitrogen oxides, and due to the improvement of emission requirements by national policies and the large application of various fuel gases, the research and development of low-nitrogen combustors become urgent needs for energy conservation and environmental protection.

The mixing head in a gas burner is a key core component of an ultra-low nitrogen burner. At present, in the domestic and foreign burner industry, the diffusion type combustion is adopted as a combustion mode, in order to ensure the sufficient combustion of fuel, a design idea of better mixing fuel and air is generally adopted, and the combustion mode has the advantages of more concentrated flame, high flame temperature and easy generation of nitrogen oxides. The amount of thermal nitrogen oxides generated increases according to the geometric multiple law with the increase of temperature. Therefore, it is very important to design a low-nitrogen gas burner.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the diffusion type combustion is adopted by the combustor in the prior art, the gas combustion is insufficient, the flame is concentrated during the combustion, the generation amount of thermal nitrogen oxide is large, and the low-nitrogen gas combustor is provided.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a low nitrogen gas burner, includes the combustor casing, the front end of combustor casing passes through the outside assembly of rotatory flange fixedly connected with, still install the inside assembly in center in the outside assembly, still install the ignition needle on the inside assembly in center, the air door is installed to one side of combustor casing and is adjusted the assembly, the air door is adjusted the assembly and is included air door case casing and air door adjustment mechanism, the electric cabinet is installed to the opposite side of combustor casing.

Preferably, the central inner assembly comprises a central bent pipe, the front end of the central bent pipe is fixedly connected with a central pipe, and the front end of the central pipe is fixedly connected with a flow divider mechanism.

Preferably, the splitter mechanism comprises a splitter, the splitter is fixedly connected to the front end of the central pipe, gas distribution pipes are uniformly distributed along the circumferential direction of the splitter, perforations are formed in the gas distribution pipes, a flame stabilizing disc is further fixedly connected to the front end of the splitter, and multiple groups of inclined long grooves can be formed in the flame stabilizing disc.

Preferably, the outer assembly comprises a flame tube, and the flame tube is fixedly connected to the rotating flange through a fastener.

Preferably, air door adjustment mechanism is including wind door driving shaft, the wind door driving shaft is worn to establish in the air door case casing, the driven shaft is still installed to the top of wind door driving shaft, wind door board is all installed to wind door driving shaft and driven shaft, all install the hinge on wind door driving shaft and the driven shaft.

Preferably, the adjacent hinges are connected through a connecting rod, a servo motor is installed on the air door box shell, and the servo motor is connected with the air door driving shaft.

Compared with the prior art, the utility model has the advantages and positive effects that,

1. the utility model discloses in, in use, under the unchangeable prerequisite of the total air feed volume of combustor, send air and fuel into the gas-distributing pipe in the inside assembly of center from axial and radial hierarchical layering, make a plurality of regions such as burning production center, axial compressor, whirl, central burning zone territory fuel is in the oxygen deficiency state, and the fuel of not burning completely meets the air and burns once more when spreading to the periphery. The staged and staged combustion can reduce the peak value and the average value of the flame temperature and the temperature of a hearth, thereby reducing the generation of nitrogen oxides and solving the problems that a combustor adopts diffusion type combustion, the combustion of gas is insufficient, the flame is concentrated during combustion, and the generation amount of thermal nitrogen oxides is large.

2. The utility model discloses in, in use, through servo motor and air door driving shaft direct-connection mode, it rotates to drive the air door driving shaft, mutual cooperation through hinge and connecting rod, accomplish the rotation regulation of whole wind door board, realize the upset of wind door board, reduce the excess oxygen in the combustion process flue gas, thereby reduce nitrogen oxide's formation, accurate design through mixing center gas circuit, make air and fuel can be most effective, the most timely mixture, make the combustion process move on the condition of theoretical air quantity as far as possible, reduce the excess oxygen in the flue gas, can restrain nitrogen oxide's production.

Drawings

FIG. 1 is a front view of a low-nitrogen gas burner according to the present invention;

FIG. 2 is a top view of a low-nitrogen gas burner according to the present invention;

FIG. 3 is a partial cross-sectional view of a center inner assembly of a low-nitrogen gas burner of the present invention;

fig. 4 is a half sectional view of a low nitrogen gas burner of the present invention;

fig. 5 is a bottom view of the damper adjustment mechanism of the low-nitrogen gas burner of the present invention.

Illustration of the drawings: 1. a burner housing; 2. rotating the flange; 3. an outer assembly; 301. a flame tube; 4. a central interior assembly; 401. a central bent pipe; 402. a central tube; 5. an ignition needle; 6. a damper adjustment assembly; 601. a damper housing; 602. a damper adjustment mechanism; 6021. an air door driving shaft; 6022. a driven shaft; 6023. a wind door panel; 6024. a hinge; 6025. a connecting rod; 6026. a servo motor; 7. an electric cabinet; 8. a diverter mechanism; 801. a flow divider; 802. a gas distributing pipe; 803. a flame stabilizing disc; 804. an inclined long groove; 805. and (6) perforating.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the present invention is not limited to the limitations set forth in the following description of the specific embodiments.

The utility model provides a low-nitrogen gas burner, including combustor casing 1, the front end of combustor casing 1 is through rotatory flange 2 fixedly connected with outside assembly 3 for the protection to the inside assembly 4 structure of center, outside assembly 3 is including flame tube 301, flame tube 301 passes through fastener fixed connection on rotatory flange 2, still install the inside assembly 4 of center in the outside assembly 3, still install ignition needle 5 on the inside assembly 4 of center, air door adjusting assembly 6 is installed to one side of combustor casing 1, air door adjusting assembly 6 includes air door case casing 601 and air door adjustment mechanism 602, adjusts the amount of wind that gets into combustor casing 1 inside, electric cabinet 7 is installed to the opposite side of combustor casing 1 for control whole combustor;

on the premise that the total air supply quantity of the combustor is not changed, air and fuel are axially and radially fed into the air distribution pipe 802 in the central inner assembly 4 in a grading and layering manner, so that a plurality of areas such as a center, an axial flow and a rotational flow are generated during combustion, the fuel in the central combustion area is in an anoxic state, and the incompletely combusted fuel meets the air and is combusted again when being diffused to the periphery. This kind of fractional stage sectional combustion can reduce the peak value and the average value of flame temperature, the furnace temperature that can reduce, thereby reduce nitrogen oxide's formation, through outside assembly 3's setting, form the protection to the concrete structure of central inside assembly 4, adjust the amount of wind that gets into combustor casing 1 inside by air door adjustment mechanism 6, improve the burning quality of gas, air door adjustment mechanism 6's control is controlled by electric cabinet 7, compare the mode of conventional diffusion formula burning, the combustion rate of gas is greatly improved, in the continuous working process, the amount of nitrogen oxide that this combustor produced compares conventional combustor nitrogen oxide's production greatly reduced, reduce the pollution to the environment.

Example 1

As shown in fig. 1 to 5, the central inner assembly 4 includes a central elbow 401, a central pipe 402 is fixedly connected to a front end of the central elbow 401, a splitter mechanism 8 is fixedly connected to a front end of the central pipe 402, the splitter mechanism 8 includes a splitter 801 for layered transportation of fuel gas, the splitter 801 is fixedly connected to a front end of the central pipe 402, gas distribution pipes 802 are uniformly distributed along a circumferential direction of the splitter 801, perforations 805 are installed on the gas distribution pipes 802 for ejecting fuel gas, a flame stabilizing disc 803 is also fixedly connected to a front end of the splitter 801, a plurality of groups of inclined elongated slots 804 may be provided in the flame stabilizing disc 803 for forming a vortex in an area above the flame stabilizing disc 803,

the whole embodiment 1 achieves the effects that in use, the flame is divided into a plurality of small flame areas through the flow divider 801, so that the heat dissipation area of the flame is increased, the temperature of the peak value of the central flame is reduced, and the generation of thermal nitrogen oxides is reduced; the gas distributing pipes 802 are circumferentially distributed around the gas distributing pipes, fuel is sprayed out in multiple angles and multiple layers, a multi-flame distribution state is formed in the flame form, the temperature of the flame root is effectively reduced, the temperature of the whole flame tends to be in a uniform distribution state, an airflow with tangential speed is generated through the self structure of the flame stabilizing disc 803, the turbulent mixing of the fuel and the air is enhanced by specific rotating airflow, meanwhile, a large amount of smoke gas flows back in the central backflow area of the rotational flow to generate a vortex, the proper vortex strength can generate enough radial and axial gradients in the airflow, which can cause airflow reversal, an annular recirculation area is generated in the flame center, high-temperature gas in the central recirculation area returns to the middle of the combustor, which ensures the ignition of cold unburned gas, and the generation of nitrogen oxides is reduced by reducing the flame temperature.

Example 2

As shown in fig. 1 to 5, the damper adjustment mechanism 602 includes a damper driving shaft 6021, the damper driving shaft 6021 is inserted into the damper box housing 601, a driven shaft 6022 is further installed above the damper driving shaft 6021, the damper driving shaft 6021 and the driven shaft 6022 are both provided with a damper plate 6023, the damper driving shaft 6021 and the driven shaft 6022 are both provided with hinges 6024, the adjacent hinges 6024 are connected with each other through a connecting rod 6025, the damper box housing 601 is provided with a servo motor 6026, and the servo motor 6026 is connected with the damper driving shaft 6021

The whole embodiment 2 achieves the effect that, in use, the air door driving shaft 6021 is driven to rotate in a direct connection mode of the servo motor 6026 and the air door driving shaft 6021, the rotation adjustment of the whole air door plate 6023 is completed through the mutual cooperation of the hinge 6024 and the connecting rod 6025, the overturning of the air door plate 6023 is realized, and the excessive oxygen in the flue gas in the combustion process is reduced, so that the generation of nitrogen oxides is reduced.

The working principle is as follows: on the premise that the total air supply quantity of the combustor is not changed, air and fuel are axially and radially fed into the air distribution pipe 802 in the central inner assembly 4 in a grading and layering manner, so that a plurality of areas such as a center, an axial flow and a rotational flow are generated during combustion, the fuel in the central combustion area is in an anoxic state, and the incompletely combusted fuel meets the air and is combusted again when being diffused to the periphery. The staged and staged combustion can reduce the peak value and the average value of the flame temperature, and the temperature of a hearth can be reduced, so that the generation of nitrogen oxides is reduced, the specific structure of the central inner assembly 4 is protected by the arrangement of the outer assembly 3, the air quantity entering the combustor shell 1 is adjusted by the air door adjusting mechanism 602, the combustion quality of fuel gas is improved, and the control of the air door adjusting mechanism 602 is controlled by the electric cabinet 7.

To sum up, the utility model discloses a self structure of flame stabilizing disc generates an air current that has tangential velocity, the turbulent mixing of fuel and air has been strengthened to specific rotatory air current, make the inside backward flow of a large amount of flue gases and produce the vortex in the central backward flow district of whirl simultaneously, suitable vortex intensity will produce sufficient radial and axial gradient in the air current, this can lead to the air current reversal, produce an annular recirculation region at the flame center, the high temperature gas in central recirculation region will get back to the combustor middle part, this has ensured the ignition to cold unburnt gas, reduce the formation of nitrogen oxide through reducing flame temperature simultaneously, through servo motor and air door driving shaft direct-connection mode, drive the rotation of air door driving shaft, through the mutual cooperation of hinge and connecting rod, accomplish the rotation regulation of whole air door board, realize the upset of air door board, reduce the excessive oxygen in the combustion process flue gas, thereby reduce the formation of nitrogen oxide, through the accurate design of mixing center gas circuit, make air and fuel can be most effective, in time mix as far as possible, make the combustion process operate on the condition of theoretical air quantity, reduce the excessive oxygen in the flue gas, can restrain the nitrogen oxide production of nitrogen oxide.

It should be noted that, the utility model discloses the multiple standard component that uses all can be obtained from the market, and nonstandard component then can customize very much, the utility model discloses the connected mode that adopts such as bolted connection, welding etc. also are very common means in the mechanical field, and the inventor is no longer repeated here.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a low nitrogen gas burner, includes combustor casing (1), its characterized in that, the front end of combustor casing (1) is through rotatory flange (2) the outside assembly (3) of fixedly connected with, still install central inside assembly (4) in outside assembly (3), still install ignition needle (5) on the inside assembly (4) in center, air door adjusting assembly (6) are installed to one side of combustor casing (1), air door adjusting assembly (6) are including air door case casing (601) and air door adjustment mechanism (602), electric cabinet (7) are installed to the opposite side of combustor casing (1).

2. A low-nitrogen gas burner according to claim 1, wherein the central inner assembly (4) comprises a central elbow (401), the front end of the central elbow (401) is fixedly connected with a central tube (402), and the front end of the central tube (402) is fixedly connected with a flow divider mechanism (8).

3. The low-nitrogen gas burner as claimed in claim 2, wherein the flow divider mechanism (8) comprises a flow divider (801), the flow divider (801) is fixedly connected to the front end of the central tube (402), gas distribution tubes (802) are uniformly distributed along the circumference of the flow divider (801), perforations (805) are arranged on the gas distribution tubes (802), a flame stabilizing disc (803) is also fixedly connected to the front end of the flow divider (801), and a plurality of groups of inclined elongated slots (804) can be arranged in the flame stabilizing disc (803).

4. A low-nitrogen gas burner according to claim 1, wherein the outer assembly (3) comprises a flame tube (301), and the flame tube (301) is fixedly connected to the rotary flange (2) through a fastener.

5. The low-nitrogen gas burner as claimed in claim 1, wherein the damper adjusting mechanism (602) comprises a damper driving shaft (6021), the damper driving shaft (6021) is arranged in the damper box housing (601) in a penetrating manner, a driven shaft (6022) is further arranged above the damper driving shaft (6021), the damper driving shaft (6021) and the driven shaft (6022) are both provided with a damper plate (6023), and hinges (6024) are respectively arranged on the damper driving shaft (6021) and the driven shaft (6022).

6. A low-nitrogen gas burner as claimed in claim 5, wherein adjacent hinges (6024) are connected by a link (6025), and a servo motor (6026) is mounted on the damper box housing (601), and the servo motor (6026) is connected to the damper driving shaft (6021).