CN218178873U - Porous medium gas fuel combustion device - Google Patents

Abstract

The utility model relates to a technical field of combustor particularly, relates to a porous medium gas fuel burner, and it includes the casing, cushion chamber and the burning chamber that has the intercommunication in the casing, one side intercommunication inlet duct in burning chamber is kept away from to the cushion chamber, the casing includes interior casing and shell body, be formed with flue gas backward flow chamber between interior casing and the shell body, be equipped with the preheating pipe way in the cushion chamber, preheating pipe way and flue gas backward flow chamber intercommunication. This application is through setting the casing to the double-deck casing of compriseing interior casing and shell body, form flue gas backward flow chamber between interior casing and the shell body, utilize flue gas backward flow chamber to return to reuse in the device with the high temperature flue gas that porous medium gas fuel burner produced to the cooperation sets up the preheating pipe way in the cushion chamber, let in the high temperature flue gas and preheat gas in the cushion chamber, make the energy obtain reasonable utilization, can improve combustion efficiency simultaneously.

Description

Porous medium gas fuel combustion device

Technical Field

The application relates to the technical field of combustors, in particular to a porous medium gas fuel combustion device.

Background

The porous medium combustion is used as a new-generation novel combustion technology, has the strong advantages of high combustion efficiency, high combustion intensity, high combustion stability, large radiation heat exchange, small equipment volume, low pollutant emission and the like when gas fuel is combusted, and has wide application prospect in the civil field.

The traditional porous medium burner generally utilizes gas and air to form mixed gas, the mixed gas is utilized to circulate in holes of a porous medium to form flameless combustion, in the process, high-temperature flue gas is generated by combustion, and the waste heat of the high-temperature flue gas of the traditional porous medium burner is not well utilized.

Disclosure of Invention

The utility model discloses problem to prior art provides a porous medium gaseous fuel burner, aims at solving prior art's technical problem.

The utility model provides a pair of porous medium gas fuel burner adopts following technical scheme:

the utility model provides a porous medium gaseous fuel burner, includes the casing, the cushion chamber and the burning chamber that have the intercommunication in the casing, one side intercommunication inlet duct in the burning chamber is kept away from to the cushion chamber, the casing includes interior casing and shell body, be formed with flue gas backward flow chamber between interior casing and the shell body, be equipped with the preheating pipe in the cushion chamber, preheating pipe and flue gas backward flow chamber intercommunication.

Through adopting above-mentioned technical scheme, set the casing to the double-deck casing of compriseing interior casing and shell body, form flue gas backward flow chamber between interior casing and shell body, utilize flue gas backward flow chamber to flow back to reuse in the device with the high temperature flue gas that porous medium gas fuel burner produced, and the cooperation sets up the preheating pipe in the cushion chamber, let in the high temperature flue gas and preheat the pipeline, utilize preheating pipe to preheat the gas of flowing through, make the energy obtain reasonable utilization, can improve combustion efficiency simultaneously.

As this application porous medium gaseous fuel burner's an improvement, the quantity of preheating the pipeline is a plurality of, the average level of preheating the pipeline is erect in the cushion chamber, every the both ends of preheating the pipeline communicate with the offside in flue gas backward flow chamber respectively, it circulates in the clearance in cushion chamber and burning chamber to have the gas flow between the preheating the pipeline. A plurality of preheating pipelines are horizontally arranged in the buffer cavity, so that the contact area between the gas and the preheating pipelines can be increased, and the gas can be more fully preheated.

As an improvement of the porous medium gas fuel combustion device, a plurality of preheating pipelines are arranged in parallel at intervals.

As an improvement of the porous medium gas fuel combustion device, a plurality of preheating pipelines are arranged in a staggered mode in the transverse and longitudinal directions.

As an improvement of the porous medium gas fuel combustion device, the preheating pipeline is a heat conducting material pipeline.

As an improvement of the porous medium gas fuel combustion device, the outer shell is a heat preservation and insulation shell.

As an improvement of the porous medium gas fuel combustion device, a gas distribution plate is further arranged in the buffer cavity and located on one side, close to the gas inlet pipeline, of the preheating pipeline.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the porous medium gas fuel combustion device can be reasonably utilized in energy, and can preheat gas by utilizing generated waste heat and improve combustion efficiency.

2. The utility model provides a structural design is ingenious, realizes that burning and waste heat utilization's process links up.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic overall structure diagram of an embodiment of the present application;

FIG. 2 is a schematic diagram of a pre-heating conduit according to the present application;

fig. 3 is another schematic diagram of the structure of the preheating pipe in the present application.

Description of reference numerals: 100. a housing; 101. an inner housing; 102. an outer housing; 1. a buffer chamber; 2. a combustion chamber; 3. an air intake duct; 11. a gas distribution plate; 12. a thermally insulating flame retardant mesh; 21. a macroporous porous medium layer; 22. a small-pore porous medium layer; 4. a flue gas reflux cavity; 5. preheating a pipeline; 6. a smoke exhaust duct; 7. a fan.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in 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 obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict.

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

Referring to fig. 1, an embodiment of the present application provides a porous medium gas fuel combustion apparatus, including a housing 100, a buffer chamber 1 and a combustion chamber 2 communicated with each other are provided in the housing 100, the buffer chamber 1 and the combustion chamber 2 are arranged in parallel up and down, and one side of the buffer chamber 1 away from the combustion chamber 2 is communicated with an air inlet pipe 3. The shape of the combustion cavity 2 can be a circular cylinder, and correspondingly, the shape of the buffer cavity 1 is a circular truncated cone; the combustion chamber 2 may be rectangular and cylindrical, and correspondingly, the cushion chamber 1 may be truncated-pyramid-shaped. In this embodiment, the shape of combustion chamber 2 is circular tube-shape, and the shape of cushion chamber 1 is round platform form, and the main aspects of cushion chamber 1 links up with combustion chamber 2, and the tip of cushion chamber 1 links up with inlet duct 3.

Be equipped with gas distribution plate 11 and thermal-insulated fire-retardant net 12 in the cushion chamber 1, gas distribution plate 11 is located one side that cushion chamber 1 is close to admission line 3 for gas that lets in cushion chamber 1 to admission line 3 carries out even gas distribution. The heat-insulating flame-retardant mesh 12 is used to improve the anti-backfire performance. The combustion chamber 2 is internally provided with a large-hole porous medium layer 21 and a small-hole porous medium layer 22, and the small-hole porous medium layer 22 is positioned at one side close to the buffer chamber 1, so that the arrangement mode can improve the anti-backfire performance. In some exemplary embodiments, the layers of macroporous 21 and small porous 22 media are laid down in series. In some exemplary embodiments, the layers of large porous media 21 and small porous media 22 may be spaced above and below each other.

In order to better gain the energy and improve combustion effect, flue gas backward flow chamber 4 and preheating pipe 5 have been added to this application for realize the high temperature flue gas backward flow that the burning produced and preheat the gas in the cushion chamber 1. Specifically, the casing 100 includes an inner casing 101 and an outer casing 102, the inner casing 101 is the casing 100 close to one side of the chamber, a flue gas recirculation cavity 4 is formed between the inner casing 101 and the outer casing 102, and an end face of the flue gas recirculation cavity 4 is open, so that the generated high-temperature flue gas can be recirculated into the flue gas recirculation cavity 4. One end of the smoke return cavity 4 close to the air inlet pipeline 3 is connected with a smoke exhaust pipeline 6. In addition, a preheating pipeline 5 is arranged in the buffer cavity 1, and an air distribution plate 11 is positioned on one side of the preheating pipeline 5 close to the air inlet pipeline 3. The preheating pipeline 5 is communicated with the flue gas reflux cavity 4. Specifically, the number of preheating pipes 5 is a plurality of, and the equal level of preheating pipes 5 is erect in cushion chamber 1, and every preheating pipe 5's both ends communicate with the offside of flue gas backward flow chamber 4 respectively, have the gas flow in the clearance in cushion chamber 1 and burning chamber 2 between the preheating pipe 5. Therefore, in the process that the gas enters the combustion chamber 2 from the buffer chamber 1, the gas can pass through the gap of the preheating pipeline 5, and the preheating pipeline 5 transfers heat to the gas in a heat transfer mode, so that the effect of preheating the gas is achieved. Based on this, in the present embodiment, the preheating pipe 5 is a heat conducting pipe, which is beneficial for heat transfer. In addition, the outer shell 102 is a heat-insulating shell 100, and the inner shell 101 is also a heat-insulating shell 100, so that on one hand, heat loss can be reduced, and on the other hand, at the side of the buffer cavity 1 close to the air inlet pipeline 3, the influence of the flue gas recirculation cavity 4 on the temperature can be reduced, that is, the influence of too high temperature at the position of the buffer cavity 1 close to the air inlet pipeline 3 on the backfire preventing performance can be avoided.

In actual manufacturing, a through hole is formed in the inner shell 101, and the pipe wall of the preheating pipe 5 is hermetically connected with the hole wall, so that only the preheating pipe 5 is communicated with the preheating return cavity.

Referring to fig. 2, in some exemplary embodiments, several preheating conduits 5 are arranged in parallel at intervals. I.e. the overall arrangement of all preheating conduits 5 is shaped like a strip network.

Referring to fig. 3, in some exemplary embodiments, several of the preheating conduits 5 are arranged in a staggered manner. I.e. the overall arrangement of all preheating conduits 5 is shaped like a grid.

Referring back to fig. 1, in some exemplary embodiments, a fan 7 is disposed within the exhaust duct. The fluidity of the gas in the flue gas recirculation chamber 4 can be promoted if necessary. It should be noted that the fan 7 may also be arranged at a position of the flue gas recirculation chamber 4 close to the exhaust duct.

Therefore, two gas passages are formed in the porous medium gas fuel combustion device, wherein one gas passage is a passage of mixed gas formed by gas and air, and the mixed gas enters the buffer cavity 1 from the gas inlet pipeline 3 and then enters the combustion cavity 2 for combustion reaction; the other gas passage is a high-temperature flue gas passage generated by combustion, and in the combustion process, part of redundant high-temperature flue gas enters from the port of the flue gas reflux cavity 4, then enters the preheating pipeline 5, returns to the flue gas reflux cavity 4 and is discharged from the smoke exhaust pipeline 6.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (7)

1. The utility model provides a porous medium gaseous fuel burner, includes casing (100), its characterized in that, cushion chamber (1) and burning chamber (2) that have the intercommunication in casing (100), one side intercommunication admission line (3) of burning chamber (2) are kept away from in cushion chamber (1), casing (100) are including interior casing (101) and shell body (102), be formed with flue gas backward flow chamber (4) between interior casing (101) and shell body (102), be equipped with preheating pipe (5) in cushion chamber (1), preheating pipe (5) and flue gas backward flow chamber (4) intercommunication.

2. The porous medium gas fuel combustion device according to claim 1, characterized in that the number of the preheating pipes (5) is several, the preheating pipes (5) are horizontally arranged in the buffer chamber (1), two ends of each preheating pipe (5) are respectively communicated with opposite sides of the flue gas recirculation chamber (4), and a gap for gas to flow through the buffer chamber (1) and the combustion chamber (2) is arranged between the preheating pipes (5).

3. A porous medium gaseous fuel combustion apparatus according to claim 2, wherein a plurality of said preheating conduits (5) are arranged in parallel at intervals.

4. The porous medium gas fuel combustion device of claim 2, wherein a plurality of the preheating pipes (5) are arranged in a staggered manner.

5. A porous medium gas fuel combustion device according to any of claims 1-4, characterized in that the preheating conduit (5) is a conduit of heat conducting material.

6. A porous medium gaseous fuel combustion apparatus according to any of claims 1-4, wherein said outer casing (102) is a heat insulating casing (100).

7. A porous medium gaseous fuel combustion apparatus according to claim 1, wherein a gas distribution plate (11) is further provided in said buffer chamber (1), said gas distribution plate (11) being located on the side of the preheating pipe (5) adjacent to the gas inlet pipe (3).

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