CN219693241U

CN219693241U - Burner and combustion system

Info

Publication number: CN219693241U
Application number: CN202320955352.7U
Authority: CN
Inventors: 陈立; 王景
Original assignee: Zhongke Zhuoyi Environmental Technology Dongguan Co ltd
Current assignee: Zhongke Zhuoyi Environmental Technology Dongguan Co ltd
Priority date: 2023-04-25
Filing date: 2023-04-25
Publication date: 2023-09-15
Anticipated expiration: 2033-04-25

Abstract

The utility model belongs to the technical field of combustion equipment, and discloses a combustor and a combustion system, wherein the combustor comprises a shell, a combustion assembly and a cooling bracket, a mounting cavity is arranged in the shell, the combustion assembly comprises an insulating plate which is positioned in the mounting cavity and is provided with a plurality of vent holes, and a combustion plate formed by splicing a plurality of silicon carbide porous ceramic plates, the silicon carbide porous ceramic plates are of porous skeleton structures, holes which are communicated with each other are formed in the silicon carbide porous ceramic plates, and the silicon carbide porous ceramic plates are paved on the cooling bracket. Through adopting the better carborundum porous ceramic piece of high temperature resistance as the burning board for the burning board is difficult to take place the coking under the high temperature, has reduced the jam condition, has prolonged the life of combustor, because mixed combustible gas is disturbed by the porous skeleton structure of carborundum porous ceramic piece, makes the burning more abundant, the burning board that the concatenation of polylith carborundum porous ceramic piece formed possesses better thermal shock resistance, and the cost of changing monolithic carborundum porous ceramic piece is lower.

Description

Burner and combustion system

Technical Field

The utility model relates to the technical field of combustion equipment, in particular to a combustor and a combustion system.

Background

At present, clean energy is mainly natural gas, and clean combustion of the natural gas is particularly important, so that the combustion of the natural gas is required to meet the low-pollution emission requirement, and the influence on environmental ecology is avoided.

With the continuous improvement of environmental protection requirements, the emission requirements of nitrogen oxides are more and more strict, in order to meet low nitrogen emission, the existing burner generally adopts two forms, one is to adopt air classification supply, fuel classification combustion and auxiliary flue gas external circulation to reduce the emission of the nitrogen oxides as much as possible, in order to reduce the emission of the nitrogen oxides, the flue gas circulation quantity needs to be increased, and therefore the fan power needs to be increased, so that the output of a boiler and the stability of combustion can be influenced, and the other is to adopt a surface wire mesh premix burner, but because the hole diameter of a wire mesh passing through a gas hole is too small, the burner is insufficient in use, the combustion efficiency is low, and the risks of blocking the passing gas hole, coking and burning out are easily caused in the operation process, so that the service life is shortened, and the burner needs to be cleaned frequently.

Disclosure of Invention

The utility model aims to provide a combustor and a combustion system, which have the advantages of full combustion, high combustion efficiency, low emission of nitrogen oxides, no need of frequent cleaning and maintenance and long service life.

To achieve the purpose, the utility model adopts the following technical scheme:

in one aspect, there is provided a burner comprising:

the device comprises a shell, wherein an installation cavity is arranged in the shell, a combustion port and an air inlet which are communicated with the installation cavity are also respectively formed in two ends of the shell, and the air inlet is used for introducing mixed combustible gas;

the combustion assembly comprises an insulating plate and a combustion plate, the insulating plate and the combustion plate are arranged in the mounting cavity, the combustion plate is formed by splicing a plurality of silicon carbide porous ceramic plates, the silicon carbide porous ceramic plates are of porous skeleton structures, holes communicated with each other are formed in the silicon carbide porous ceramic plates, a plurality of vent holes are formed in the insulating plate, and the mixed combustible gas is combusted on the silicon carbide porous ceramic plates sequentially through the vent holes and the holes;

the cooling support is fixedly arranged on one side, close to the combustion port, of the mounting cavity, a plurality of silicon carbide porous ceramic plates are laid on the cooling support, and cooling medium used for cooling flows through the cooling support and the shell.

Optionally, the combustion assembly further comprises a first fixing ring for fixing the insulation panel within the mounting chamber;

the combustion assembly further includes a second securing ring for securing the combustion plate within the mounting chamber.

Optionally, the burner further comprises a pressing member connected to the mounting chamber, the pressing member being used for pressing the heat insulating plate and the combustion plate on the cooling bracket in sequence along a first direction.

Optionally, the casing includes shell and inner shell, the shell with be equipped with the intermediate layer space between the inner shell, the inside cavity of cooling support with the intermediate layer space intercommunication, the casing still include with feed liquor pipe and the drain pipe of intermediate layer space intercommunication.

Optionally, the liquid inlet pipe is provided with a first flange, the first flange is used for being connected with a liquid supply device for providing the cooling medium, the liquid outlet pipe is provided with a second flange, and the second flange is used for being connected with a recovery device for recovering the cooling medium.

Optionally, the insulating plate is a polycrystalline alumina plate.

Optionally, the plurality of ventilation holes on the insulating plate are uniformly distributed at equal intervals.

Optionally, the burner further comprises a fire detection probe, and the fire detection probe is arranged on one side of the shell close to the combustion port.

Optionally, the burner further comprises an ignition device, and the ignition device is arranged on one side of the shell close to the combustion port.

In another aspect, there is provided a combustion system comprising a burner as claimed in any one of the preceding claims, the combustion system further comprising a fan and a gas pre-mixer connected to the fan, the gas pre-mixer being in communication with the inlet of the burner, the fan being arranged to feed air into the gas pre-mixer for mixing with fuel gas, the mixed fuel gas entering the burner through the inlet.

The utility model has the beneficial effects that:

the utility model provides a burner and a combustion system, which adopt silicon carbide porous ceramic plates with better high temperature resistance as combustion plates, so that the combustion plates are not easy to coke at high temperature, the blocking condition is reduced, the service life of the burner is prolonged, and as the silicon carbide porous ceramic plates are of a porous framework structure and are internally provided with mutually communicated holes, mixed combustible gas is disturbed and disturbed when passing through the holes, large flames are divided into small flames, so that the combustion is more sufficient. Because the silicon carbide porous ceramic sheet is paved on the cooling support, the cooling support and the shell are prevented from being deformed due to high temperature by introducing cooling medium into the cooling support and the shell, so that the damage of the cooling support and the shell is avoided.

Drawings

FIG. 1 is a front view of a burner of the present utility model;

fig. 2 is a side view of the burner of the present utility model.

In the figure:

1. a housing; 11. a mounting chamber; 12. a combustion port; 13. an air inlet; 131. an air inlet pipe; 132. a connecting flange; 14. a housing; 15. an inner case; 16. an interlayer space; 17. a liquid inlet pipe; 171. a first flange; 18. a liquid outlet pipe; 181. a second flange;

2. a combustion assembly; 21. a heat insulating plate; 211. a vent hole; 22. a combustion plate; 221. a hole; 23. a first fixing ring; 24. a second fixing ring;

3. a cooling support;

4. a pressing member; 41. a compression ring; 42. a sleeve; 43. a flange plate;

5. a fire detection probe;

6. an ignition device.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the 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.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

In order to ensure the full progress of the combustion process, improve the combustion efficiency, reduce the emission of nitrogen oxides, reduce the frequency of cleaning and maintenance, and prolong the service life, the embodiment provides a combustor and a combustion system.

The combustion system comprises a combustor, a fan and a gas pre-mixer, wherein the gas pre-mixer is communicated with an air inlet 13 of the combustor, the fan is used for sending air into the gas pre-mixer to be mixed with fuel gas, and mixed fuel gas enters the combustor through the air inlet 13. By applying the burner, the combustion system ensures the full progress of the combustion process, thereby improving the combustion efficiency of the combustion system and reducing the emission of nitrogen oxides.

As shown in fig. 1 to 2, the burner comprises a housing 1, a combustion assembly 2 and a cooling bracket 3. The shell 1 is internally provided with a mounting cavity 11, two ends of the shell 1 are respectively provided with a combustion port 12 and an air inlet 13 which are communicated with the mounting cavity 11, the air inlet 13 is used for introducing mixed combustible gas, the combustion assembly 2 comprises an insulating plate 21 and a combustion plate 22, the insulating plate 21 and the combustion plate 22 are all arranged in the mounting cavity 11, the combustion plate 22 is formed by splicing a plurality of silicon carbide porous ceramic plates, the silicon carbide porous ceramic plates are of a porous skeleton structure, holes 221 which are mutually communicated are formed in the inside, the insulating plate 21 is provided with a plurality of vent holes 211, the mixed combustible gas is combusted on the silicon carbide porous ceramic plates sequentially through the vent holes 211 and the holes 221, the cooling bracket 3 is fixedly arranged on one side, close to the combustion port 12, of the mounting cavity 11, and a plurality of silicon carbide porous ceramic plates are paved on the cooling bracket 3, and cooling media for cooling are circulated in the cooling bracket 3 and the shell 1.

Through adopting the better carborundum porous ceramic piece of high temperature resistance as burning board 22, compare in the porous material of metal fiber more high temperature resistant, make burning board 22 be difficult to take place coking under high temperature, reduce the jam condition, thereby prolonged the life of combustor, and because carborundum porous ceramic piece is porous skeleton structure, inside has hole 221 of intercommunication each other, make mixed combustible gas be disturbed when passing hole 221, disturb, cut apart big flame into little flame, make the burning more abundant, in addition, burning board 22 adopts the porous ceramic piece concatenation of polylith carborundum to form, make it possess better thermal shock resistance, reduce its probability of damaging, and change the porous ceramic piece of carborundum of monolithic damage, cost of maintenance has also been reduced. Because the silicon carbide porous ceramic sheet is paved on the cooling support 3, the cooling support 3 and the shell 1 can not be deformed due to high temperature by introducing cooling medium into the cooling support 3 and the shell 1, so that the damage of the cooling support 3 and the shell 1 is avoided.

In the present embodiment, the housing 1 has a hollow cylindrical structure, so that it is convenient to adapt to the hearth structure of most boilers and heating furnaces, thereby increasing the application range of the burner. And an air inlet pipe 131 is arranged on the air inlet 13, and a connecting flange 132 is arranged on the air inlet pipe 131, so that the shell 1 is conveniently connected with the gas premixer.

Optionally, the combustion assembly 2 further comprises a first fixing ring 23, the first fixing ring 23 being used for fixing the insulation panel 21 in the mounting chamber 11, and the combustion assembly 2 further comprises a second fixing ring 24, the second fixing ring 24 being used for fixing the combustion panel 22 in the mounting chamber 11. The heat insulating plate 21 and the combustion plate 22 are preferably mounted and fixed by providing the first fixing ring 23 and the second fixing ring 24. The first fixing ring 23 and the second fixing ring 24 are made of alumina, and have heat insulation effect, so that deformation caused by overhigh temperature due to direct contact between the shell 1 and the combustion assembly 2 can be avoided.

Optionally, as shown in fig. 1, the burner further comprises a pressing member 4, the pressing member 4 being connected to the mounting chamber 11, the pressing member 4 being adapted to press the heat insulating plate 21 and the combustion plate 22 against the cooling support 3 in sequence in the first direction. Thereby facilitating the fixing of the heat insulating plate 21 and the combustion plate 22. In this embodiment, the pressing member 4 includes a pressing ring 41, a sleeve 42 and a flange 43, one end of the sleeve 42 is connected with the pressing ring 41, the other end of the sleeve 42 is connected with the flange 43, the outer wall of the sleeve 42 is attached to the inner wall of the installation cavity 11, the pressing ring 41 contacts with the heat insulation plate 21, and the flange 43 is connected with a connecting flange 132 of an air inlet pipe 131 on the housing 1, so that the pressing member 4 is fixed on the housing 1.

Optionally, as shown in fig. 1, the casing 1 includes an outer casing 14 and an inner casing 15, an interlayer space 16 is provided between the outer casing 14 and the inner casing 15, the interior of the cooling bracket 3 is hollow and is communicated with the interlayer space 16, and the casing 1 further includes a liquid inlet pipe 17 and a liquid outlet pipe 18 which are communicated with the interlayer space 16. By introducing cooling medium into the shell 1 and the cooling support 3, the shell 1 and the cooling support 3 are cooled, and the structures of the shell 1 and the cooling support 3 are prevented from being damaged by high temperature.

In this embodiment, the housing 1 is a cylinder with an interlayer, which is rolled by a steel plate, the cooling bracket 3 is formed by combining a plurality of steel pipes, two ends of each steel pipe are respectively communicated with the interlayer space 16, so that a cooling medium in the interlayer space 16 can enter the cooling bracket 3, and the steel pipes are connected with the housing 1 by welding. In addition, in this embodiment, the cooling medium may be cooling water or cooling oil, and the cooling medium may have a cooling function, and will not be described here.

Further, as shown in fig. 1, the liquid inlet pipe 17 is provided with a first flange 171, the first flange 171 is used for being connected with a liquid supply device for providing cooling medium, the liquid outlet pipe 18 is provided with a second flange 181, and the second flange 181 is used for being connected with a recovery device for recovering the cooling medium. The liquid inlet pipe 17 is conveniently connected with the liquid supply device by arranging the first flange 171, and the liquid outlet pipe 18 is conveniently connected with the recovery device by arranging the second flange 181.

Alternatively, the insulating plate 21 is a polycrystalline alumina plate. Since the polycrystalline alumina plate has good refractory material with high temperature resistance, it is not easy to burn out, which is beneficial to prolonging the service life of the burner, and in other embodiments, other materials with refractory function can be selected as the insulating plate 21.

Further, as shown in fig. 1, the plurality of ventilation holes 211 on the heat insulating plate 21 are uniformly distributed at equal intervals. By equally distributing the ventilation holes 211, it is ensured that the mixed combustible gas is uniformly brought into contact with the combustion plate 22, thereby ensuring uniform combustion, ensuring sufficient progress of the combustion process, and thus reducing emission of nitrogen oxides.

Optionally, as shown in fig. 2, the burner further includes a fire detection probe 5, and the fire detection probe 5 is disposed on a side of the housing 1 near the combustion port 12. The temperature of combustion is observed in real time by providing the fire detection probe 5. In this embodiment, the combustion system further includes a safety control device, and the combustion system is controlled by receiving and analyzing the data detected on the fire detection probe 5, so as to avoid risks such as equipment damage caused by too high temperature.

Optionally, as shown in fig. 2, the burner further comprises an ignition device 6, wherein the ignition device 6 is arranged on one side of the housing 1 close to the combustion opening 12. The mixed combustible gas is ignited by the ignition device 6, and the mixed combustible gas is burned on the combustion plate 22. The ignition device 6 is illustratively an ignition gun.

When the burner works, firstly, the combustion system controls the fan to send air into the gas premixer to be mixed with combustible gas, then the mixed combustible gas in the gas premixer sequentially passes through the vent hole 211 and the hole 221 through the air inlet 13, the ignition device 6 is started at the moment, the mixed combustible gas is ignited, so that the mixed combustible gas burns on the surface of the combustion plate 22, as the silicon carbide porous ceramic plates forming the combustion plate 22 are of a porous skeleton structure, the holes 221 which are communicated with each other are formed in the porous ceramic plates, the mixed combustible gas is disturbed and disturbed when passing through the holes 221, the large flame is divided into small flames, so that the combustion is more complete, and the heat insulation plate 21 is made of a polycrystalline alumina plate, so that the heat insulation plate is not ignited, thereby playing the role of a fire arrestor, at the moment, the fire detection probe 5 detects the combustion temperature at any time, thereby ensuring the safe operation of the combustion process, and the interlayer space 16 of the shell 14 and the cooling support 3 are always introduced with cooling medium in the combustion process, thereby cooling the shell 14 and the cooling support 3, and avoiding the influence of high temperature.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. A burner, characterized in that it comprises:

the fuel gas burner comprises a shell (1), wherein an installation cavity (11) is arranged in the shell (1), a combustion port (12) and an air inlet (13) which are communicated with the installation cavity (11) are respectively formed in two ends of the shell (1), and the air inlet (13) is used for introducing mixed combustible gas;

the combustion assembly (2), the combustion assembly (2) comprises an insulating plate (21) and a combustion plate (22), the insulating plate (21) and the combustion plate (22) are arranged in the installation cavity (11), the combustion plate (22) is formed by splicing a plurality of silicon carbide porous ceramic plates, the silicon carbide porous ceramic plates are of porous framework structures, holes (221) which are mutually communicated are formed in the silicon carbide porous ceramic plates, a plurality of vent holes (211) are formed in the insulating plate (21), and the mixed combustible gas sequentially passes through the vent holes (211) and the holes (221) to burn on the silicon carbide porous ceramic plates;

the cooling support (3), cooling support (3) set firmly in one side that installation cavity (11) is close to combustion port (12), the polylith carborundum porous ceramic piece shop in on cooling support (3), cooling support (3) with circulate in casing (1) and be used for refrigerated cooling medium.

2. Burner according to claim 1, wherein the combustion assembly (2) further comprises a first fixing ring (23), the first fixing ring (23) being used for fixing the insulation panel (21) within the mounting chamber (11);

the combustion assembly (2) further comprises a second fixing ring (24), the second fixing ring (24) being used for fixing the combustion plate (22) in the mounting chamber (11).

3. Burner according to claim 1, characterized in that it further comprises a hold-down element (4), said hold-down element (4) being connected in said mounting chamber (11), said hold-down element (4) being adapted to hold down said insulation panels (21) and said combustion plates (22) in sequence in a first direction on said cooling support (3).

4. A burner according to any one of claims 1-3, characterized in that the housing (1) comprises an outer shell (14) and an inner shell (15), a sandwich space (16) is provided between the outer shell (14) and the inner shell (15), the cooling rack (3) is hollow inside and communicates with the sandwich space (16), and the housing (1) further comprises a liquid inlet pipe (17) and a liquid outlet pipe (18) communicating with the sandwich space (16).

5. Burner according to claim 4, characterized in that the inlet pipe (17) is provided with a first flange (171), the first flange (171) being adapted to be connected to a liquid supply device for supplying the cooling medium, the outlet pipe (18) is provided with a second flange (181), the second flange (181) being adapted to be connected to a recovery device for recovering the cooling medium.

6. A burner according to any one of claims 1-3, characterized in that the insulating plate (21) is a polycrystalline alumina plate.

7. A burner according to claim 6, wherein a plurality of said ventilation holes (211) in said insulating panel (21) are equally spaced.

8. A burner according to any one of claims 1-3, characterized in that the burner further comprises a fire detection probe (5), the fire detection probe (5) being arranged on a side of the housing (1) close to the combustion opening (12).

9. A burner according to any one of claims 1-3, characterized in that the burner further comprises an ignition device (6), the ignition device (6) being arranged on the side of the housing (1) adjacent to the combustion opening (12).

10. Combustion system, characterized in that it comprises a burner according to any one of claims 1-9, further comprising a fan and a gas pre-mixer connected to the fan, which gas pre-mixer communicates with the gas inlet (13) of the burner, which fan is adapted to feed air into the gas pre-mixer for mixing with the gas, the mixed combustible gas after mixing entering the burner through the gas inlet (13).