CN219045746U

CN219045746U - Low-nitrogen burner

Info

Publication number: CN219045746U
Application number: CN202223435685.1U
Authority: CN
Inventors: 谢进明; 郝兆龙; 陈怀举; 张依琳
Original assignee: Beijing Ruichen Hangyu Energy Technology Co ltd
Current assignee: Beijing Ruichen Hangyu Energy Technology Co ltd
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-05-19
Anticipated expiration: 2032-12-19

Abstract

The utility model discloses a low-nitrogen burner, belongs to the technical field of burners, and solves the technical problems of more pollutant generation and serious oxidation burning loss of steel in the prior art. The combustion engine comprises a central gun barrel, wherein one end of the central gun barrel is communicated with a central gun gas inlet channel and a central gun air inlet channel, and the other end of the central gun barrel is communicated with a first combustion chamber; one side of the central gun barrel, which is far away from the first combustion chamber, is connected with a gas distributor, one end of the gas distributor, which is far away from the first combustion chamber, is communicated with a gas inlet channel, and one end of the gas distributor, which is close to the first combustion chamber, is communicated with a plurality of gas pipes; one side of the first combustion chamber close to the central gun barrel is communicated with an air distributor, and one side of the first combustion chamber far away from the central gun barrel is communicated with a second combustion chamber; the air distributor is communicated with an air inlet channel. The low-nitrogen burner can heat steel better, and has high combustion efficiency, low steel loss and less pollution emission.

Description

Low-nitrogen burner

Technical Field

The utility model relates to the technical field of combustors, in particular to a low-nitrogen combustor.

Background

Along with the development of society, environmental protection consciousness is deep, energy conservation and emission reduction become important targets of combustor design, and China is used as a major country of steel, a large amount of steel can be produced each year, and when the steel is heated, a large amount of pollutants can be produced, and huge loss can be caused by oxidation of the steel, so that the reduction of oxidation burning loss of the steel during heating is urgent.

Patent publication No. CN212673215U discloses a low-nitrogen burner, which enhances the disturbance of the combustion air flow by providing a swirl impeller, a first disturbance hole and a second disturbance hole, so that the combustion air in the furnace is fully combusted, and pollutants such as nitrogen oxides are formed; however, the problem of the oxidation and burning loss of steel due to the difficulty in adjusting the furnace atmosphere caused by the excessive arrangement of air is not considered, and the oxidation and burning loss of steel billets is increased due to the fact that the whole furnace chamber is provided with the oxidizing atmosphere by the burner. Therefore, there is a need for a burner that can avoid oxidation and burning of steel and reduce emissions of pollutants such as nitrogen oxides.

Disclosure of Invention

The utility model aims to provide a low-nitrogen burner, which solves the technical problems of more pollutant generation and serious oxidation burning loss of steel in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a low-nitrogen combustor which comprises a central gun barrel, wherein one end of the central gun barrel is communicated with a central gun gas inlet channel and a central gun air inlet channel, and the other end of the central gun barrel is communicated with a first combustion chamber; one side of the central gun barrel, which is far away from the first combustion chamber, is connected with a gas distributor, one end of the gas distributor, which is far away from the first combustion chamber, is communicated with a gas inlet channel, and one end of the gas distributor, which is close to the first combustion chamber, is communicated with a plurality of gas pipes; one side of the first combustion chamber close to the central gun barrel is communicated with an air distributor, and one side of the first combustion chamber far away from the central gun barrel is communicated with a second combustion chamber; the air distributor is communicated with an air inlet channel.

The technical effect of adopting the technical scheme is as follows: through the center gun barrel and with the center gun air inlet way and the center gun gas inlet way of center gun barrel intercommunication for the mode that center gun barrel adopted premixed gas burning, make at center gun barrel gas exit end burning rate faster, be favorable to the quick ignition to fire other a plurality of gas pipe internal spun gas, realize the regulation to steel and steel surrounding atmosphere when heating through a plurality of gas pipes.

Optionally or preferably, the first combustion chamber is fixedly connected with a refractory brick layer, the first combustion chamber penetrates through the refractory brick layer, and the first combustion chamber is gradually retracted from one side close to the central gun barrel to one side far away from the central gun barrel.

Optionally or preferably, the refractory brick layer is fixedly connected with a furnace wall outside, a second combustion chamber is arranged inside the furnace wall, and the second combustion chamber is gradually expanded from one side close to the central gun barrel to one side far away from the central gun barrel.

Optionally or preferably, the plurality of gas pipes comprises a plurality of primary gas pipes and a plurality of secondary gas pipes; the first-stage gas pipes are arranged on the left side and the right side of the central gun barrel in a straight line and are communicated with the first combustion cavity; the plurality of secondary gas pipes are arranged on the upper side or the lower side of the central gun barrel, penetrate through the refractory brick layer and are communicated with the second combustion cavity.

The technical effect of adopting the technical scheme is as follows: the secondary gas pipe is arranged on the upper side or the lower side of the central gun barrel, so that the atmosphere in the combustion cavity is regulated when steel is heated, a reducing atmosphere area is formed on one side close to the arrangement of the secondary gas pipe, and the reduction of the oxidation burning loss and the generation amount of nitrogen oxides just before is facilitated.

Optionally or preferably, flame holders are arranged at the gas nozzles of the first-stage gas pipes.

Optionally or preferably, the first-stage gas pipes are arranged independently or are communicated with each other; the gas output end of the primary gas pipe is a hole-shaped nozzle; the number of the secondary gas pipes is three, and the secondary gas pipes and the primary gas pipes are arranged in parallel on the upper side of the central gun barrel.

The technical effect of adopting the technical scheme is as follows: through arranging the first-stage gas pipe in a straight line on two sides of the central gun barrel and adopting a mode of the hole-shaped nozzle, fuel gas in the first-stage gas pipe is sprayed out through the hole-shaped nozzle at a certain angle, the spraying surface of the fuel gas is increased, the mixing of the fuel gas and air is facilitated, and the generation of pollutants is reduced.

Based on the technical scheme, the embodiment of the utility model at least has the following technical effects:

(1) According to the low-nitrogen combustor provided by the utility model, the secondary fuel gas is arranged at one side, so that the atmosphere in a hearth is regulated, a reduction zone is formed in the hearth, and the oxidation of a steel billet and the generation amount of nitrogen oxides are reduced;

(2) The primary gas injector adopts a straight-line arranging structure, and the gas output end adopts a hole-shaped nozzle, which is equivalent to an aggregate of a row of simple small-hole nozzles, so that the injection surface of the gas is increased, the mixing of the gas and air is facilitated, and the generation of pollutants is reduced;

(3) The central gun barrel adopts a premixed flame mode, so that the combustion speed is high, and the main stream flame of the combustor can be ignited and ignited rapidly.

Drawings

FIG. 1 is a schematic view of the overall structure of the low nitrogen burner of the present utility model;

FIG. 2 is a left side view of a central cross-section of the low nitrogen burner central barrel of the present utility model;

FIG. 3 is a central cross-sectional elevation view of a low nitrogen burner central barrel of the present utility model;

FIG. 4 is a schematic cross-sectional view of the center of the secondary gas pipe of the low nitrogen burner of the present utility model.

In the figure: 1. a central gun gas inlet channel; 2. a center gun air inlet channel; 3. a gas inlet channel; 4. an air inlet duct; 5. a layer of firebrick; 6. a furnace wall; 7. a flame holder; 8. an air distributor; 9. a central gun barrel; 10. a gas distributor; 11. a primary gas pipe; 12. a secondary gas pipe; 13. a thermal insulation panel layer; 14. a first combustion chamber; 15. and a second combustion chamber.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model; it is apparent that the described embodiments are only some embodiments of the present utility model, not all of them, and all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present utility model without making any inventive effort are within the scope of the present utility model.

Referring to fig. 1 to 4, a low-nitrogen burner includes a central barrel 9 as an ignition device, and a central gun gas inlet 1 and a central gun air inlet 2 which are communicated with one end of the central barrel 9, wherein the central barrel 9 as a burner pilot lamp adopts a premixed gas burning mode, so that the burning speed at a gas outlet end is high, and the burner is favorable for quickly igniting and igniting gas ejected from a plurality of other gas pipes.

The other end of the central gun barrel 9 is communicated with a first combustion chamber 14, and a refractory brick layer 5 is arranged outside the first combustion chamber 14, namely the first combustion chamber 14 penetrates through the refractory brick layer 5, and the refractory brick layer 5 is used for heat preservation, fixation and sealing; the outside of the firebrick layer 5 is fixedly connected with a furnace wall 6, a second combustion chamber 15 is arranged in the furnace wall 6, and the first combustion chamber 14 is gradually arranged from one side close to the central gun barrel 9 to one side far away from the central gun barrel 9, namely gradually arranged from left to right in fig. 2; the second combustion chamber 15 is arranged to be divergent from the side closer to the central barrel 9 to the side further from the central barrel 9, i.e. from left to right in fig. 2. The side of the first combustion chamber 14, which is close to the central gun barrel 9, is communicated with an air distributor 8, and the side of the first combustion chamber 14, which is far away from the central gun barrel 9, is communicated with a second combustion chamber 15; the air distributor 8 is communicated with an air inlet channel 4.

In this embodiment, a thermal insulation panel layer 13 is disposed at the periphery of the air distributor 8, the interior of the thermal insulation panel layer 13 is sealed, and the air inlet 4 penetrates through the thermal insulation panel layer 13 and communicates with the air distributor 8.

The central gun barrel 9 is connected with a gas distributor 10 at one side far away from the first combustion chamber 14, one end of the gas distributor 10 far away from the first combustion chamber 14 is communicated with a gas inlet channel 3, one end of the gas distributor 10 near the first combustion chamber 14 is connected with a plurality of gas pipes, and the plurality of gas pipes comprise a first-stage gas pipe 11 which is arranged on the left side and the right side of the central gun barrel 9 in a straight line.

In this embodiment, the adjacent primary gas pipes 11 are communicated, and the gas output end of the primary gas pipe 11 is a hole-shaped nozzle, so that the gas is sprayed out at a certain angle through the hole-shaped nozzle, the spraying surface of the gas is increased, the mixing with air can be enhanced, and the formation of pollutants such as carbon smoke, nitrogen oxides and the like is reduced; the gas output ends of the plurality of primary gas pipes 11 are provided with flame holders 7.

The plurality of gas pipes further comprise three secondary gas pipes 12 which are arranged on the upper side of the central gun barrel 9 and penetrate through the refractory brick layer 5 and are communicated with the second combustion chamber 15, when the burner heats steel, the position of the steel is generally located above or below the burner, when the steel is burnt, the steel is always excessive, namely, in the steel heating process, the position is generally located on the upper side or the lower side of the central gun barrel 6 in the device, the secondary gas pipes 12 are arranged on one side of the burner, and the gas is concentrated on one side of the burner, so that a reducing atmosphere is formed on one side of the burner where the gas is located more easily, and the problems that the steel is seriously burnt due to oxidation and more pollutants are avoided in the steel heating process.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The low-nitrogen combustor is characterized by comprising a central gun barrel (9), wherein one end of the central gun barrel (9) is communicated with a central gun gas inlet channel (1) and a central gun air inlet channel (2), and the other end of the central gun barrel (9) is communicated with a first combustion chamber (14);

one side of the central gun barrel (9) far away from the first combustion chamber (14) is connected with a gas distributor (10), one end of the gas distributor (10) far away from the first combustion chamber (14) is communicated with a gas inlet channel (3), and one end of the gas distributor (10) near the first combustion chamber (14) is communicated with a plurality of gas pipes;

one side of the first combustion chamber (14) close to the central gun barrel (9) is communicated with an air distributor (8), and one side of the first combustion chamber (14) far away from the central gun barrel (9) is communicated with a second combustion chamber (15); the air distributor (8) is communicated with an air inlet channel (4).

2. The low-nitrogen burner according to claim 1, characterized in that the first combustion chamber (14) is fixedly connected with a firebrick layer (5) outside, the first combustion chamber (14) is arranged penetrating the firebrick layer (5), and the first combustion chamber (14) is gradually arranged from one side close to the central gun barrel (9) to one side far away from the central gun barrel (9).

3. The low-nitrogen burner according to claim 2, characterized in that the exterior of the firebrick layer (5) is fixedly connected with a furnace wall (6), a second combustion chamber (15) is arranged in the furnace wall (6), and the second combustion chamber (15) is gradually expanded from one side close to the central gun barrel (9) to one side far away from the central gun barrel (9).

4. A low nitrogen burner according to claim 3, wherein said plurality of gas pipes comprises a plurality of primary gas pipes (11) and a plurality of secondary gas pipes (12); a plurality of primary gas pipes (11) are arranged on the left side and the right side of the central gun barrel (9) in a straight line and are communicated with the first combustion cavity (14); the plurality of secondary gas pipes (12) are arranged on the upper side or the lower side of the central gun barrel (9) and penetrate through the refractory brick layer (5) to be communicated with the second combustion cavity (15).

5. The low-nitrogen burner according to claim 4, characterized in that flame holders (7) are arranged at the gas nozzles of a plurality of the primary gas pipes (11).

6. The low-nitrogen burner according to claim 4, wherein a plurality of the primary gas pipes (11) are provided independently of each other or are provided in communication between adjacent primary gas pipes (11); the gas output end of the primary gas pipe (11) is a hole-shaped nozzle;

the number of the secondary gas pipes (12) is three, and the secondary gas pipes (12) are arranged on the upper side of the central gun barrel (9) in parallel with the primary gas pipes (11).