CN219494092U

CN219494092U - Tubular self-preheating type gas burner

Info

Publication number: CN219494092U
Application number: CN202223577854.5U
Authority: CN
Inventors: 陈政武
Original assignee: Guangzhou Wetz Thermal Technology Co ltd
Current assignee: Guangzhou Wetz Thermal Technology Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-08-08
Anticipated expiration: 2032-12-30

Abstract

The utility model discloses a tubular self-preheating type gas burner, which comprises: the outer shell comprises a heat exchanger and an air shell, wherein the air shell is sleeved on the periphery of the rear end of the heat exchanger, the whole heat exchanger is of a cylindrical structure, and the front end of the heat exchanger is provided with an opening; the main part ignites, and it is including gas entry, gas pipeline, second grade gas pipe, nozzle head, ceramic combustion chamber and the inner tube spout that connect gradually, the whole holding of main part ignites is in outer shell, the lateral wall of gas pipeline and nozzle head are linked together respectively at the both ends of second grade gas pipe, gas entry is located the rear end of heat exchanger, the opening of inner tube spout intercommunication heat exchanger front end. According to the utility model, the secondary gas pipe is arranged, so that the burner can realize staged combustion, and the burner has high efficiency and low emission.

Description

Tubular self-preheating type gas burner

Technical Field

The utility model relates to the technical field of kiln combustion, in particular to a tubular self-preheating type gas burner.

Background

Burners are commonly known as combustion devices for industrial fuel furnaces, and are generally referred to as a combustion device body, which has a fuel inlet, an air inlet, and an ejection hole, and serves to distribute fuel and combustion air and to eject the fuel and air in a certain manner for combustion. The burner can also be called a burner, but is different from an integrated burner used on a small-sized boiler, the burner belongs to an integrated machine, and is also called a burner generally, and the burner comprises a combustion-supporting fan, a fuel pressurizing and conveying pipe fitting and an ignition monitoring controller which are integrated into a whole, so that the burner is suitable for the small-sized boiler and a small-sized fuel heating furnace with a small amount of spraying points; the former can include ignition electrode and flame monitoring probe, but single nozzle does not generally contain combustion-supporting fan, fuel pressurization and delivery pipe fitting and ignition monitoring controller, needs to arrange nozzle and combustion-supporting fan, combustion-supporting air shell way, fuel pressurization and delivery pipe fitting and ignition monitoring controller according to the specific structure and the heating technology requirement of different heating furnaces, and the application field of nozzle is wider than integrated combustor.

In the prior art, the heat exchange medium generally comprises two types, namely a first type, wherein the heat exchange medium is provided with a pipe wall and a heat accumulator, the heat accumulator is used as the heat exchange medium, the flue gas and the air are required to be frequently switched, and the temperature fluctuation of the air can influence the performance of the burner through the heat accumulator in turn; while the second type uses the tube wall as a heat exchange medium, the length of the tube wall and the heat exchange performance of the tube wall affect the performance of the burner.

The Chinese patent of publication No. CN209415449U discloses a secondary preheating burner, which comprises a burner inner tube, a gas tube, a burner outer tube, a smoke shell and a smoke air heat exchanger, wherein the front end of the burner inner tube is provided with a flame outlet, the front end of the burner outer tube is provided with an air outlet at the flame outlet, the smoke air heat exchanger comprises a smoke circulation channel and an air circulation channel, the smoke air heat exchanger is arranged, the air is preheated for the first time by utilizing the waste heat of smoke, and the smoke closer to an air nozzle is preheated for the second time after the air preheated for the first time passes through an air main channel, so that the full utilization of the smoke waste heat is increased, the waste of the smoke waste heat is reduced, and the combustion efficiency of fuel gas is improved.

However, the above patent only improves the gas efficiency and reduces waste heat, but the emission of harmful gases such as nitrogen oxides may increase, thereby affecting the health of staff, and it is difficult to have both high efficiency and low emission.

Disclosure of Invention

In order to overcome the technical defect that the existing burner is difficult to have high efficiency and low emission, the utility model provides a tubular self-preheating type gas burner.

In order to solve the problems, the utility model is realized according to the following technical scheme:

the utility model discloses a tubular self-preheating type gas burner, which comprises:

the outer shell comprises a heat exchanger and an air shell, wherein the air shell is sleeved on the periphery of the rear end of the heat exchanger, the whole heat exchanger is of a cylindrical structure, and the front end of the heat exchanger is provided with an opening;

the main part ignites, and it is including gas entry, gas pipeline, second grade gas pipe, nozzle head, ceramic combustion chamber and the inner tube spout that connect gradually, the whole holding of main part ignites is in outer shell, the lateral wall of gas pipeline and nozzle head are linked together respectively at the both ends of second grade gas pipe, gas entry is located the rear end of heat exchanger, the opening of inner tube spout intercommunication heat exchanger front end.

As a preferred embodiment of the utility model, the number of the secondary gas pipes is at least 2, and the secondary gas pipes are arranged around the gas pipeline at intervals so as to realize the multi-stage supply of the burner head gas.

As a preferred embodiment of the present utility model, the heat exchanger includes a heat exchanger inner tube, a heat exchanger outer tube, and a heat exchanger cap.

As a preferred embodiment of the utility model, the upper end of the air shell is provided with an upward extending flue gas outlet.

As a preferred embodiment of the present utility model, the lower end of the air housing is provided with an air inlet protruding downward; alternatively, the air inlet is located on one of the vertical sides of the air housing and extends outwardly.

As a preferred embodiment of the utility model, the connection part between the gas inlet and the gas pipeline is bent at 90 degrees; the opening of the fuel gas inlet is downwards arranged; or the opening of the fuel gas inlet is upward; alternatively, the opening of the gas inlet is arranged towards the left; alternatively, the opening of the gas inlet is disposed toward the right.

As a preferred embodiment of the utility model, the burner head is of a conical structure, and the smaller end of the burner head and the ceramic combustion chamber is connected with the end part of the injection preheating device.

As a preferred embodiment of the utility model, the inclined surface of the burner head is provided with a main nozzle at the middle part and a plurality of split nozzle holes distributed at the periphery, the main nozzle is used for being connected with a fuel gas pipeline, and the split nozzle holes are used for being connected with a secondary fuel gas pipe.

As a preferred embodiment of the utility model, the outer surface of the heat exchanger outer tube is provided with a heat exchange fin structure.

As a preferred embodiment of the present utility model, the inner tube spout is made of a ceramic material.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model creatively adds the secondary gas pipe directly on the gas pipeline and the burner head, can simultaneously meet the stable air temperature, the higher preheated air temperature and the lower emission of nitrogen oxides, and can enhance the mixing efficiency of the gas and the air by arranging the secondary gas pipe so as to shorten the combustion reaction time and further reduce the highest flame temperature, thereby improving the combustion performance of the burner, improving the combustion efficiency and simultaneously greatly reducing the emission of harmful gases such as nitrogen oxides and the like, so that the burner has high efficiency and low emission.

Drawings

The utility model is described in further detail below with reference to the attached drawing figures, wherein:

FIG. 1 is a schematic perspective view of a tubular self-preheating gas burner of the present utility model;

FIG. 2 is a schematic side view of a tubular self-preheating gas burner of the present utility model;

FIG. 3 is a schematic cross-sectional view of a tubular self-preheating gas burner of the present utility model;

in the figure:

1. a gas inlet; 2. a gas pipeline; 3. a secondary gas pipe; 4. a burner head; 5. an inner tube spout; 6. a flue gas outlet; 7. an air housing; 8. an inner tube of the heat exchanger; 9. an outer tube of the heat exchanger; 10. a ceramic combustion chamber; 11. a heat exchanger cap opening; 12. an air inlet.

Detailed Description

The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.

The detailed features and advantages of the present utility model will be set forth in the following detailed description of the embodiments, which is provided to enable any person skilled in the art to make and use the present utility model, and the related objects and advantages of the present utility model will be readily understood by those skilled in the art from the present disclosure, claims and drawings. The following examples are presented to illustrate the aspects of the utility model in further detail, but are not intended to limit the scope of the utility model in any way.

In addition, the following drawings disclose embodiments of the present utility model, for the purpose of making the drawings clean, some conventional structures and elements may be schematically depicted in the drawings, and some of the features in the drawings may be slightly enlarged or changed in scale or size to achieve the purpose of facilitating understanding and viewing of the technical features of the present utility model, but the present utility model is not limited thereto. Further, coordinate axes are provided in the drawings to facilitate understanding of the relative positional relationship and actuation direction of the elements.

It should be understood that the direction or positional relationship indicated by the terms "upper", "lower", etc. are based on the direction or positional relationship shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" 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.

In addition, the terms "end," "portion," "region," and "place" may be used hereinafter to describe particular elements and structures or particular features thereon or therebetween, but these elements and structures are not limited by these terms. "and/or" may also be used herein to refer to a combination comprising one or more of the listed elements or structures. Furthermore, the terms "substantially," "about," or "approximately" when used in connection with a range of sizes, concentrations, temperatures, or other physical or chemical properties or characteristics may be used hereinafter to cover deviations in the upper and/or lower limits of the ranges of properties or characteristics that may exist, or to represent acceptable deviations from manufacturing tolerances or analysis procedures, while still achieving the desired results.

Moreover, unless defined otherwise, all terms or words used herein, including technical and scientific terms and other words, are to be taken to include their ordinary meanings as understood by one of ordinary skill in the art. Furthermore, the definitions of the words and terms used in the present specification should be interpreted as including a meaning consistent with the technical field of the present utility model. These terms are not to be construed as being overly idealized or formal intent unless expressly so defined.

As shown in fig. 1 to 3, the preferred structure of the tubular self-preheating gas burner according to the present utility model is shown.

the outer shell comprises a heat exchanger and an air shell 7, wherein the air shell 7 is sleeved on the periphery of the rear end of the heat exchanger, the whole heat exchanger is of a cylindrical structure, and the front end of the heat exchanger is provided with an opening;

the main part that ignites, it is including gas entry 1, gas pipeline 2, second grade gas pipe 3, nozzle head 4, ceramic combustion chamber 10 and the inner tube spout 5 that connect gradually, the whole holding of main part that ignites is in outer shell, the lateral wall of gas pipeline 2 and the lateral wall of nozzle head 4 are linked respectively to the both ends of second grade gas pipe 3, gas entry 1 is located the rear end of heat exchanger, the opening of inner tube spout 5 intercommunication heat exchanger front end.

As a preferred embodiment of the present utility model, the number of the secondary gas pipes 3 is at least 2, and the secondary gas pipes 3 are arranged around the gas pipe 2 at intervals, so as to realize multi-stage supply of the gas of the burner head 4.

As a preferred embodiment of the utility model, the heat exchanger comprises an inner heat exchanger tube 8, an outer heat exchanger tube 9 and a heat exchanger cap 11.

As a preferred embodiment of the utility model, the upper end of the air housing 7 is provided with an upwardly projecting flue gas outlet 6.

As a preferred embodiment of the present utility model, the lower end of the air housing 7 is provided with an air inlet 1 protruding downward; alternatively, the air inlet 1 is located on one of the vertical sides of the air housing 7 and protrudes outwards.

As a preferred embodiment of the utility model, the connection part between the gas inlet 1 and the gas pipeline 2 is bent at 90 degrees; the opening of the fuel gas inlet 1 is arranged downwards; alternatively, the opening of the gas inlet 1 is upward; alternatively, the opening of the gas inlet 1 is provided to the left; alternatively, the opening of the gas inlet 1 is provided to the right.

As a preferred embodiment of the utility model, the burner head 4 is in a conical structure, and the smaller end of the ceramic combustion chamber 10 of the burner head 4 is connected with the end part of the injection preheating device.

As a preferred embodiment of the present utility model, the inclined surface of the burner head 4 is provided with a main nozzle at the middle part and a plurality of split nozzle holes distributed at the periphery, wherein the main nozzle is used for being connected with the gas pipeline 2, and the split nozzle holes are used for being connected with the secondary gas pipe 3.

As a preferred embodiment of the present utility model, the outer surface of the heat exchanger outer tube 9 is provided with a heat exchange fin structure.

In the utility model, the combustion of the tubular self-preheating gas burner is carried out in a staged manner. The primary fuel gas is supplied through the fuel gas pipeline 2 and enters the burner head 4 from the central spray hole, the primary fuel gas and the preheated air are mixed and combusted, the secondary fuel gas is supplied through the secondary fuel gas pipe 3 and enters the burner head 4 from the split nozzles distributed on the wall surface of the burner head 4, and a large amount of accelerated air and the high-temperature mixed gas which is incompletely combusted for the first time are mixed and combusted in the burner head 4, so that strong surge motion is generated, and the mixture is fully mixed and combusted again.

The working principle of the tubular self-preheating type gas burner provided by the utility model is as follows:

the utility model creatively adds the secondary gas pipe 3 directly on the gas pipeline 2 and the burner head 4, can simultaneously meet the stable air temperature, higher preheated air temperature and lower nitrogen oxide emission, and can enhance the mixing efficiency of gas and air by arranging the secondary gas pipe 3 so as to shorten the combustion reaction time and further reduce the highest flame temperature, thereby improving the combustion performance of the burner, improving the combustion efficiency and greatly reducing the emission of harmful gases such as nitrogen oxides and the like, and simultaneously ensuring that the burner has high efficiency and low emission.

Other structures of the tubular self-preheating gas burner described in this embodiment are referred to in the prior art.

The present utility model is not limited to the preferred embodiments, and any modifications, equivalent variations and modifications made to the above embodiments according to the technical principles of the present utility model are within the scope of the technical proposal of the present utility model.

Claims

1. A tubular self-preheating gas burner, comprising:

2. The tubular self-preheating gas burner of claim 1, wherein:

the number of the secondary gas pipes is at least 2, and the secondary gas pipes are distributed at intervals and are arranged around the gas pipeline so as to realize the multistage supply of the burner head gas.

3. The tubular self-preheating gas burner of claim 2, wherein:

the heat exchanger comprises an inner heat exchanger tube, an outer heat exchanger tube and a heat exchanger cap opening.

4. A tubular self-preheating gas burner as claimed in claim 3, wherein:

the upper end of the air shell is provided with a smoke outlet which extends upwards.

5. The tubular self-preheating gas burner of claim 4, wherein:

the lower end of the air shell is provided with an air inlet which extends downwards;

alternatively, the air inlet is located on one of the vertical sides of the air housing and extends outwardly.

6. The tubular self-preheating gas burner of claim 5, wherein:

the joint between the gas inlet and the gas pipeline is bent at 90 degrees;

the opening of the fuel gas inlet is downwards arranged;

or the opening of the fuel gas inlet is upward;

alternatively, the opening of the gas inlet is arranged towards the left;

alternatively, the opening of the gas inlet is disposed toward the right.

7. The tubular self-preheating gas burner of claim 6, wherein:

the burner head is of a conical structure, and the smaller end of the burner head and the smaller end of the ceramic combustion chamber are connected with the end part of the injection preheating device.

8. The tubular self-preheating gas burner of claim 7, wherein:

the burner is characterized in that a main nozzle positioned in the middle and a plurality of diversion spray holes distributed on the periphery are arranged on the inclined surface of the burner head, the main nozzle is used for being connected with a gas pipeline, and the diversion spray holes are used for being connected with a secondary gas pipe.

9. The tubular self-preheating gas burner of claim 1, wherein:

the outer surface of the outer tube of the heat exchanger is provided with a heat exchange fin structure.

10. The tubular self-preheating gas burner of claim 1, wherein:

the inner tube spout is made of a ceramic material.