CN217154174U

CN217154174U - Air single heat storage burner

Info

Publication number: CN217154174U
Application number: CN202220696911.2U
Authority: CN
Inventors: 程奇伯; 张道明; 王宏宇; 冯霄红; 雍海泉
Original assignee: Chongqing CISDI Thermal and Environmental Engineering Co Ltd; CISDI Research and Development Co Ltd
Current assignee: Chongqing CISDI Thermal and Environmental Engineering Co Ltd; CISDI Research and Development Co Ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-08-09
Anticipated expiration: 2032-03-28

Abstract

The utility model relates to a single regenerative burner of air belongs to the combustor field. The burner comprises a high-temperature gas channel, a gas spray pipe and a heat accumulator, wherein the high-temperature gas channel is a single channel with a contraction section, and the horizontal dimension of the cross section of the channel is larger than the vertical dimension; the plurality of gas nozzles are offset from the upper side or the lower side of the high-temperature gas channel. This nozzle can provide tiling type flame through optimizing the spout design, simple structure, and the processing preparation is easy, has solved present because of the gas drunkenness in the heat accumulator, the nozzle casing that the high temperature flue gas condition such as bias current brought in the heat accumulator emits a fire, the heat accumulator utilization efficiency low grade problem.

Description

Air single heat storage burner

Technical Field

The utility model belongs to the combustor field, concretely relates to single heat accumulation nozzle of air.

Background

According to different preheating media of the heat accumulator, the heat accumulation combustion technology can be divided into two modes of air and gas double heat accumulation or air single heat accumulation. In the field of steel rolling heating furnaces, over ten years, a double heat storage combustion technology has developed relatively mature, and the air single heat storage combustion technology has some defects in application.

The common air single heat accumulation burner applied to domestic steel rolling heating furnaces is an imported product, the product is a revolving body structure with gas wrapped by heat accumulation air, a fuel channel of the product is arranged at the center of a high-temperature gas channel, although pouring material heat preservation and cooling measures are adopted, the characteristic of large production fluctuation of the heating furnace still causes thermal shock stripping of a castable heat preservation layer after multiple temperature rises and falls, then a metal spray pipe is exposed in flame, and the service life is severely limited; in addition, the revolving body flame structure of the air-wrapped fuel gas has the defects that the flame coverage is small, the oxidizing atmosphere at the outer side is close to the heated workpiece, and the like.

The prior art is optimized in the earlier stage, but the problems of flame emitting of the burner shell, low utilization efficiency of the heat accumulator and the like are caused by the conditions that fuel gas moves in the heat accumulator, high-temperature flue gas flows in the heat accumulator and the like in the specific implementation process.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a single heat accumulation nozzle of air provides tiling type flame through optimizing the spout design to solve the problem that the casing leaps up fire and high temperature flue gas bias flow brought.

In order to achieve the above purpose, the utility model provides a following technical scheme:

an air single heat accumulation burner comprises a high-temperature gas channel, a gas spray pipe and a heat accumulator, wherein the high-temperature gas channel is a single channel with a contraction section, and the size of the cross section of the single channel in the horizontal direction is larger than that in the vertical direction; the plurality of gas nozzles are offset from the upper side or the lower side of the high-temperature gas channel.

Further, the outlet section of the gas spray pipe is a sudden expansion section with the pipe diameter becoming larger.

Furthermore, an included angle A is formed between the axis of the gas spray pipe and the axis of the high-temperature gas channel, and A is more than or equal to 0 degree and less than or equal to 30 degrees.

Further, the number of the gas spray pipes is not less than two.

Further, the cross section of the high-temperature gas channel is rectangular or elliptical.

Furthermore, the contraction angle of the contraction section in the high-temperature gas channel is B, and B is more than or equal to 0 degree and less than or equal to 60 degrees.

Further, a plurality of gas nozzles are symmetrically arranged about a central plane of the high-temperature gas passage.

Further, the heat accumulator is disposed on the way of the high-temperature gas passage.

The beneficial effects of the utility model reside in that:

(1) the gas spray pipe is offset at one side of the high-temperature gas channel, so that the service life of the gas nozzle can be effectively ensured; the sudden expansion structure at the outlet of the gas spray pipe can thoroughly avoid gas from mixing in cracks of the heat accumulator, and further cut off or avoid fire from mixing in the heat accumulator or at the joint of the heat accumulator and the furnace wall.

(2) The fuel gas and the air are layered up and down, and the upper side and the lower side of the flame are respectively in reducing property and oxidizing property, so that the atmosphere on the surface of the heated workpiece can be conveniently adjusted according to the requirement.

(3) The gas spray pipe and the high-temperature gas channel are provided with a small included angle, so that the air nozzle and the gas nozzle are spread in the horizontal direction, stable flame with wide-area distribution is provided, and the temperature uniformity of a heating space is improved.

(4) The single high-temperature gas channel with the small necking is beneficial to the uniform distribution of high-temperature flue gas in the heat storage body in the smoke exhaust stage, and can accelerate high-temperature air in the heat supply stage, thereby enhancing the rigidity and stability of flame and greatly reducing the manufacturing difficulty of the channel.

Generally speaking, this nozzle can provide tiling type flame through optimizing the spout design, has the characteristic of low oxidation, no flaring, no flue gas bias flow and temperature distribution is even, has solved present nozzle shell flaring, the heat accumulator inefficiency scheduling problem that brings because of the circumstances such as gas drunkenness in the heat accumulator, high temperature flue gas bias flow in the heat accumulator. The structure is simple, the processing and the manufacturing are easy, and the device can be widely applied to thermal equipment taking gas as fuel in the industries of metallurgy, machinery, chemical industry and the like, and is particularly suitable for hot rolling heating furnaces.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.

Drawings

For the purposes of promoting a better understanding of the objects, features and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a side view of FIG. 1 illustrating the cross-sectional configuration of the hot gas path and the gas lance;

FIG. 3 is a side view of FIG. 1 illustrating a cross-sectional configuration of the hot gas path and the gas lance;

reference numerals:

the high-temperature gas heat-storage device comprises a high-temperature gas channel 1, a gas spray pipe 2, a heat accumulator 3, a contraction section 101 and a sudden expansion section 201.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.

Referring to fig. 1 to 3, the air single regenerative burner in the present embodiment includes a high-temperature gas channel 1, a gas nozzle 2, and a heat accumulator 3, where the high-temperature gas channel 1 is a single channel with a small-angle contraction section 101, and a horizontal dimension of a cross section of the single channel is greater than a vertical dimension of the single channel; three gas lances 2 are offset from the upper side of the hot gas channel 1.

In the burner, the heat accumulator 3 is arranged along the high-temperature gas channel 1, and can be arranged on one side of the air inlet end of the high-temperature gas channel 1 or on one side of the air nozzle end of the high-temperature gas channel 1. The contraction angle of the contraction section 101 in the high-temperature gas channel 1 is B, preferably 0 DEG-60 deg. Along the air flow direction, the contraction section 101 on the high-temperature gas channel 1 should be located the place ahead of heat accumulator 3, and this contraction section 101 is favorable to high-temperature flue gas evenly distributed in heat accumulator 3 in the stage of discharging fume, can accelerate (formed through the heating of heat accumulator 3) high-temperature air in the heat supply stage, can not only strengthen flame rigidity and flame stability like this, can also reduce the preparation degree of difficulty of nozzle by a wide margin.

In this embodiment, three gas lances 2 are offset from the upper side of the hot gas channel 1, and the cross section of the hot gas channel 1 has a horizontal dimension greater than a vertical dimension, and preferably has a rectangular or oval cross section. At this time, the gas nozzle 2 and the high-temperature gas channel 1 are arranged in a vertically layered manner, and the gas and the air are also in a vertically layered manner. The gas spray pipe 2 which is offset at one side of the high-temperature gas channel 1 can effectively ensure the service life of a gas nozzle; the upper and lower sides of the flame can respectively present reducibility and oxidizability, so that the atmosphere on the surface of the heated workpiece can be conveniently adjusted according to requirements.

In order to ensure the uniformity of the mixture of the fuel gas and the air and facilitate the control of the fuel delivery quantity, the three fuel gas spray pipes 2 are symmetrically arranged relative to the central plane of the high-temperature gas channel 1. Here, it should be specifically noted that: the term "cross section" in this embodiment refers to the high-temperature gas channel 1 as a pipe, and the cross section corresponds to a radial section of the pipe. The "horizontal direction" and the "vertical direction" are the X-axis direction and the Y-axis direction on the cross section.

Preferably, an included angle A is formed between the axis of the gas nozzle 2 and the axis of the high-temperature gas channel 1, and A is more than or equal to 0 degree and less than or equal to 30 degrees. The small included angle A can enable the air nozzle of the high-temperature gas channel 1 and the gas spray pipe 2 to spread in the horizontal direction, is favorable for providing stable flame distributed in a wide area, and is favorable for improving the temperature uniformity of a heating space.

In this embodiment, the outlet sections of the three gas nozzles 2 are all the sudden expansion sections 201 with the larger pipe diameters, and the specific change trend of the pipe diameters is linearly increased along the spraying direction of the gas. The sudden expansion structure at the outlet of the gas spray pipe 2 can thoroughly avoid the gas from mixing in cracks of the heat accumulator, and further cut off or avoid fire leaping in the heat accumulator 3 or at the joint of the heat accumulator and the furnace wall.

This nozzle can provide tiling type flame through optimizing the spout design, simple structure, and the processing preparation is easy, has solved present because of the gas drunkenness in the heat accumulator, the nozzle casing that the high temperature flue gas condition such as bias current brought in the heat accumulator emits a fire, the heat accumulator utilization efficiency low grade problem. It can be widely used in the thermal equipment using gas as fuel in the metallurgy, mechanical and chemical industries, especially in the hot rolling heating furnace.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.

Claims

1. The utility model provides a single heat accumulation nozzle of air, includes high temperature gas passageway (1), gas spray tube (2) and heat accumulator (3), its characterized in that: the high-temperature gas channel (1) is a single channel with a contraction section (101), and the horizontal dimension of the cross section of the channel is larger than the vertical dimension; the plurality of gas nozzles (2) are offset at the upper side or the lower side of the high-temperature gas channel (1).

2. An air single regenerative burner according to claim 1, characterized in that: the outlet section of the gas spray pipe (2) is a sudden expansion section (201) with the pipe diameter being enlarged.

3. An air single regenerative burner according to claim 1, characterized in that: an included angle A is formed between the axis of the gas spray pipe (2) and the axis of the high-temperature gas channel (1), and A is more than or equal to 0 degree and less than or equal to 30 degrees.

4. An air single regenerative burner according to any of claims 1 to 3, characterized in that: the number of the gas jet pipes (2) is not less than two.

5. An air single regenerative burner according to claim 4, characterized in that: the cross section of the high-temperature gas channel (1) is rectangular or oval.

6. An air single regenerative burner in accordance with claim 5, wherein: the contraction angle of the contraction section (101) in the high-temperature gas channel (1) is B, and B is more than or equal to 0 degree and less than or equal to 60 degrees.

7. An air single regenerative burner according to claim 5, characterized in that: the plurality of gas nozzles (2) are symmetrically arranged relative to the central plane of the high-temperature gas channel (1).

8. An air single regenerative burner according to claim 1, characterized in that: the heat accumulator (3) is arranged along the high-temperature gas channel (1).