CN220287440U

CN220287440U - Ultralow nitrogen combustor

Info

Publication number: CN220287440U
Application number: CN202322325459.6U
Authority: CN
Inventors: 李东禹; 谭文达; 刘永才
Original assignee: Shenzhen Jiayuntong Electronics Co Ltd
Current assignee: Shenzhen Jiayuntong Electronics Co Ltd
Priority date: 2023-08-29
Filing date: 2023-08-29
Publication date: 2024-01-02
Anticipated expiration: 2033-08-29

Abstract

The utility model relates to the technical field of burners, and provides an ultralow nitrogen burner. The burner comprises a main gas assembly, a combustion cylinder and an auxiliary gas assembly; the main gas assembly comprises a main gas pipe, a supporting rod, a cyclone and a flame stabilizing disc; the main gas pipe and the cyclone are sequentially connected and axially arranged in the combustion cylinder; the cyclone is arranged at one end of the support rod connected with the main gas pipe; the flame stabilizing disc is arranged at one end of the supporting rod far away from the main gas pipe and is connected with the inner wall of the combustion cylinder; a side wall of one end of the combustion cylinder body, which is far away from the flame stabilizing disc, is provided with a gas hole; one end of the main gas pipe far away from the support rod passes through the gas hole; the auxiliary gas assembly is sleeved at one end of the combustion cylinder body, which is close to the supporting rod, and the injection pipe of the auxiliary gas assembly extends to one end port of the combustion cylinder body, which is close to the supporting rod. The combustion device can effectively reduce the generation of NOx during combustion and improve the environmental protection effect.

Description

Ultralow nitrogen combustor

Technical Field

The utility model belongs to the technical field of burners, and particularly relates to an ultralow nitrogen burner.

Background

Along with the increasingly prominent environmental problems, the national environmental protection policy is becoming stricter, the emission requirements on nitrogen oxides of the boiler are also higher and higher, the thermal NOx is mainly used in the combustion process of the natural gas burner mainly used for methane, and when the flame temperature is higher, the NOx generation amount is more, and the emission into the air can pollute the environment. Therefore, how to reduce the NOx generated in the operation process of the boiler and avoid the emission of atmospheric pollution is a problem to be solved urgently at present.

Therefore, the ultralow nitrogen combustor is designed, the generation of NOx during combustion can be effectively reduced, the environmental protection effect is improved, and the ultralow nitrogen combustor is a problem to be solved urgently at present.

Disclosure of Invention

Based on the above, the utility model aims to overcome the defects of the prior art, and provides an ultralow nitrogen burner, which is characterized in that air is classified through a cyclone and a flame stabilizing disc, and is fully and effectively mixed with fuel gas through different main fuel gas branch pipes and second ventilation ports in each classification, so that the uniformity of the temperature of a combustion area is ensured, and the condition that NOx is generated at high temperature due to excessive local air is avoided. Meanwhile, the auxiliary gas component is arranged to realize the absorption of the backflow flue gas in the combustion, and the backflow flue gas reduces the temperature of flame, so that a good effect of inhibiting the generation of NOx can be achieved. Generally, the multi-stage air and gas mixing and the absorption of the backflow flue gas greatly improve the combustion temperature, effectively avoid the generation of NOx and improve the environmental protection performance of the burner.

The first technical scheme provided by the utility model is as follows:

an ultralow nitrogen combustor comprises a main gas assembly, a combustion cylinder and an auxiliary gas assembly; the main gas assembly comprises a main gas pipe, a supporting rod, a cyclone and a flame stabilizing disc; the main gas pipe and the cyclone are sequentially connected and axially arranged in the combustion cylinder; the cyclone is arranged at one end of the support rod connected with the main gas pipe; the flame stabilizing disc is arranged at one end of the supporting rod far away from the main gas pipe and is connected with the inner wall of the combustion cylinder; a side wall of one end of the combustion cylinder body, which is far away from the flame stabilizing disc, is provided with a gas hole; one end of the main gas pipe far away from the support rod passes through the gas hole; the auxiliary gas assembly is sleeved at one end of the combustion cylinder body, which is close to the supporting rod, and the injection pipe of the auxiliary gas assembly extends to one end port of the combustion cylinder body, which is close to the supporting rod.

Further, main gas branch pipes are axially arranged on the main gas pipe close to the end of the support rod at intervals, and vent holes are arranged on the main gas branch pipes at intervals; the exhaust direction of the vent hole is consistent with the axis of the combustion cylinder body and faces the flame stabilizing disc.

Further, the cyclone comprises a plurality of blades which are axially arranged at intervals, and the blades are provided with first ventilation holes; the flame stabilizing disc comprises a disc body and a flame stabilizing body; the flame stabilizing body is arranged in the center of the tray body, and a flame stabilizing cavity of the flame stabilizing body is communicated with the support rod; a flame stabilizing hole is formed in one side, far away from the supporting rod, of the flame stabilizing body; the flame stabilizing disc is connected with the combustion cylinder body, and a flow deflector is arranged on one side of the disc body far away from the supporting rod at intervals; the tray body is provided with second ventilation holes at intervals.

Further, the auxiliary gas assembly comprises an auxiliary gas inlet pipe, a gas collecting bag and an injection pipe; the gas collecting bag is coated on the combustion cylinder; the auxiliary air inlet pipe is communicated with the air collecting bag; one end of the gas collecting bag, which is close to the flame stabilizing disc, is provided with a plurality of injection pipes at intervals around the circumference of the combustion cylinder body, and one end of each injection pipe is connected with the gas collecting bag.

Further, the injection pipe comprises an air separation section, a spray head, a mixed flow section and an elbow; the gas separation section, the spray head, the mixed flow section and the elbow are connected in sequence, and one end, far away from the spray head, of the gas separation section is connected with the gas collection bag; one end of the mixed flow section, which is close to the spray head, is circumferentially provided with negative pressure holes at intervals; one end of the elbow far away from the mixed flow section is bent in a direction which is close to the axis of the combustion cylinder.

Further, the number of the injection pipes is 4, and the injection pipes are uniformly circumferentially arranged at intervals.

The utility model has the beneficial effects that:

the ultra-low nitrogen burner carries out grading treatment on air through the cyclone and the flame stabilizing disc, and fully and effectively mixes with fuel gas through different main fuel gas branch pipes and second air inlets during each grading, so that the uniformity of the temperature of a combustion area is ensured, and the condition that NOx is generated at high temperature due to excessive local air is avoided. Meanwhile, the auxiliary gas component is arranged to realize the absorption of the backflow flue gas in the combustion, and the backflow flue gas reduces the temperature of flame, so that a good effect of inhibiting the generation of NOx can be achieved. Generally, the multi-stage air and gas mixing and the absorption of the backflow flue gas greatly improve the combustion temperature, effectively avoid the generation of NOx and improve the environmental protection performance of the burner.

Drawings

FIG. 1 is a schematic view of a first view angle structure of an ultra-low nitrogen burner according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a second view angle structure of an ultra-low nitrogen burner according to an embodiment of the utility model.

Reference numerals illustrate:

110. a combustion cylinder; 120. a main gas assembly; 121. a main gas pipe; 122. a cyclone; 123. a support rod; 124. a flame stabilizing disc; 41. a main gas branch pipe; 61. a tray body; 62. a flame stabilizing body; 130. an auxiliary gas assembly; 131. an auxiliary air inlet pipe; 132. a gas collecting bag; 133. an ejector tube; 31. dividing the gas into gas sections; 32. a spray head; 33. a mixed flow section; 34. an elbow; 51. and (3) a blade.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the embodiments of the present application, it should be understood that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate orientations or positional relationships based on those shown in the drawings, or those conventionally put in place when the product of the application is used, or those conventionally understood by those skilled in the art, merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the application.

In the description of the embodiments of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.

The technical solutions in the present application will be described below with reference to the accompanying drawings.

Referring to fig. 1-2, an embodiment of the present application provides an ultra-low nitrogen burner, which includes a main gas assembly 120, a combustion cylinder 110, and an auxiliary gas assembly 130; the main gas assembly 120 includes a main gas pipe 121, a support rod 123, a swirler 122, and a flame holding tray 124; the main gas pipe 121 and the cyclone 122 are sequentially connected and axially arranged in the combustion cylinder 110; the cyclone 122 is arranged at one end of the support rod 123 connected with the main gas pipe 121; the flame stabilizing disc 124 is arranged at one end of the supporting rod 123 far away from the main gas pipe 121, and the flame stabilizing disc 124 is connected with the inner wall of the combustion cylinder 110; a side wall of one end of the combustion cylinder 110, which is far away from the flame stabilizing disc 124, is provided with a gas hole; one end of the main gas pipe 121, which is far away from the supporting rod 123, passes through the gas hole; the auxiliary gas assembly 130 is sleeved on one end of the combustion cylinder 110, which is close to the supporting rod 123, and the injection pipe 133 of the auxiliary gas assembly 130 extends to one end port of the combustion cylinder 110, which is close to the supporting rod 123.

The ultra-low nitrogen burner performs classification treatment on air through the cyclone 122 and the flame stabilizing disc 124, and performs full and effective mixing with fuel gas through different main fuel gas branch pipes 41 and second ventilation ports during each classification, so as to ensure the uniformity of the temperature of a combustion area and avoid the condition of generating NOx at high temperature due to excessive local air. Meanwhile, the auxiliary gas assembly 130 is arranged to realize the absorption of the backflow flue gas in the combustion, and the backflow flue gas reduces the temperature of flame, so that a good effect of inhibiting the generation of NOx can be achieved. Generally, the multi-stage air and gas mixing and the absorption of the backflow flue gas greatly improve the combustion temperature, effectively avoid the generation of NOx and improve the environmental protection performance of the burner.

The specific structure of the ultra-low nitrogen burner is described in detail below:

the main gas pipe 121 is provided with main gas branch pipes 41 at intervals in the axial direction near the end of the supporting rod 123, and the main gas branch pipes 41 are provided with vent holes at intervals; the vent holes are vented in a direction coincident with the axis of the combustion bowl 110 and toward the flame stabilizing tray 124. The vent hole in the main gas branch pipe 41 discharges part of the gas and air to be mixed for the first time, and the mixture is fully mixed through the cyclone 122.

The cyclone 122 comprises a plurality of blades 51 which are axially arranged at intervals, and the blades 51 are provided with first ventilation holes; the flame stabilizing tray 124 includes a tray body 61 and a flame stabilizing body 62; the flame stabilizing body 62 is arranged in the center of the tray body 61, and a flame stabilizing cavity of the flame stabilizing body 62 is communicated with the supporting rod 123; a flame stabilizing hole is arranged on one side of the flame stabilizing body 62 far away from the supporting rod 123; the flame stabilizing disc 124 is connected with the combustion cylinder 110, and a flow guide sheet is arranged on one side of the disc 61 far away from the supporting rod 123 at intervals; the tray 61 is provided with second ventilation holes at intervals.

The auxiliary gas assembly 130 comprises an auxiliary gas inlet pipe 131, a gas collecting bag 132 and an injection pipe 133; the gas collecting bag 132 is coated on the combustion cylinder 110; the auxiliary air inlet pipe is communicated with the air collecting bag 132; one end of the gas collecting bag 132, which is close to the flame stabilizing disc 124, is provided with a plurality of injection pipes 133 at intervals around the circumference of the combustion cylinder 110, and one end of each injection pipe 133 is communicated with the gas collecting bag 132. The auxiliary gas assembly 130 mainly performs backflow suction of the flue gas, so that on one hand, the flue gas can be fully combusted at one time, and on the other hand, the flame temperature can be reduced by utilizing the flue gas, and further, the generation of NOx during combustion is avoided.

The injection pipe 133 comprises a gas separation section 31, a spray head 32, a mixed flow section 33 and an elbow 34; the gas separation section 31, the spray head 32, the mixed flow section 33 and the elbow 34 are sequentially connected, and one end, far away from the spray head 32, of the gas separation section 31 is communicated with the gas collecting bag 132; the end of the mixed flow section 33, which is close to the spray head 32, is circumferentially provided with negative pressure holes at intervals; the end of the elbow 34 remote from the mixing section 33 is curved in a direction that is too close to the axis of the combustion bowl 110. The plurality of negative pressure holes are used for sucking part of the returned smoke. The outlets of the elbows 34 are all oriented toward the axis, and the back-flowing flue gas reduces the peak temperature of the flame again, so that the generation of NOx is inhibited again.

Of course, the number of the injection pipes 133 can be set as required, and in this application, the injection pipes 133 are 4 in number and evenly circumferentially spaced.

In summary, the main effective effects of the embodiments provided by the present utility model are as follows:

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. An ultralow nitrogen combustor is characterized by comprising a main gas component, a combustion cylinder and an auxiliary gas component; the main gas assembly comprises a main gas pipe, a supporting rod, a cyclone and a flame stabilizing disc; the main gas pipe and the cyclone are sequentially connected and axially arranged in the combustion cylinder; the cyclone is arranged at one end of the supporting rod, which is connected with the main gas pipe; the flame stabilizing disc is arranged at one end, far away from the main gas pipe, of the supporting rod and is connected with the inner wall of the combustion cylinder; a side wall of one end of the combustion cylinder body far away from the flame stabilizing disc is provided with a gas hole; one end, far away from the supporting rod, of the main fuel gas pipe penetrates through the fuel gas hole; the auxiliary gas assembly is sleeved on one end, close to the supporting rod, of the combustion cylinder body, and the injection pipe of the auxiliary gas assembly extends to an end port, close to the supporting rod, of the combustion cylinder body.

2. The ultra-low nitrogen burner of claim 1, wherein main gas branch pipes are axially spaced on the main gas pipe near the ends of the support rods, and vent holes are spaced on the main gas branch pipes; the exhaust direction of the vent hole is consistent with the axis of the combustion cylinder body and faces the flame stabilizing disc.

3. The ultra-low nitrogen combustor according to claim 1, wherein said swirler comprises a plurality of axially spaced vanes, and said vanes are provided with first ventilation holes; the flame stabilizing disc comprises a disc body and a flame stabilizing body; the flame stabilizing body is arranged in the center of the tray body, and a flame stabilizing cavity of the flame stabilizing body is communicated with the supporting rod; a flame stabilizing hole is formed in one side, far away from the supporting rod, of the flame stabilizing body; the flame stabilizing disc is connected with the combustion cylinder body, and guide vanes are arranged on one side, far away from the supporting rod, of the disc body at intervals; and second ventilation holes are formed in the tray body at intervals.

4. The ultra-low nitrogen combustor according to claim 1, wherein said auxiliary gas assembly comprises an auxiliary gas inlet pipe, a gas collection bag and an ejector pipe; the gas collecting bag is coated on the combustion cylinder; the auxiliary air inlet pipe is communicated with the air collecting bag; and a plurality of injection pipes are arranged at intervals around the circumference of the combustion cylinder body at one end of the gas collecting bag, which is close to the flame stabilizing disc, and one end of each injection pipe is communicated with the gas collecting bag.

5. The ultra-low nitrogen burner of claim 4, wherein said ejector tube comprises a gas-dividing section, a nozzle, a mixed flow section, and an elbow; the gas separation section, the spray head, the mixed flow section and the elbow are sequentially connected, and one end, far away from the spray head, of the gas separation section is communicated with the gas collecting bag; negative pressure holes are circumferentially arranged at intervals at one end, close to the spray head, of the mixed flow section; and one end of the elbow, which is far away from the mixed flow section, is bent in a direction which is close to the axis of the combustion cylinder.

6. The ultra-low nitrogen burner of claim 5, wherein said injector tube is positioned 4 times and evenly circumferentially spaced.