CN221122213U - Fire row assembly and combustor - Google Patents

Abstract

The utility model relates to the technical field of heat supply, in particular to a fire grate assembly and a burner. The fire grate assembly comprises a fire grate body, an outer shell and a flow dividing piece, wherein the fire grate body is provided with an injection channel and a mixing channel which are communicated with each other, the side wall of the fire grate body is provided with a fuel gas flow dividing hole, and the fuel gas flow dividing hole is communicated with the mixing channel; the outer shell is fixedly arranged at two sides of the fire grate body, a gap is reserved between the fire grate body and the outer shell, a light flame cavity is formed, and the outer shell is provided with a plurality of air inlet holes communicated with the light flame cavity; the flow dividing piece is arranged in the fire grate body and positioned at the upper part of the mixing channel, and divides the fire grate body into two thick flame cavities. The shell body is provided with the air inlet, can reduce the gas content in the mixed gas, reduces the combustion heat and then reduces nitrogen oxide's formation, sets up the air inlet on the upper portion of subassembly is arranged to the fire simultaneously, can provide more air for the post combustion of gas, and then improves combustion quality, makes the gas can fully burn.

Description

Fire row assembly and combustor

Technical Field

The utility model relates to the technical field of heat supply, in particular to a fire grate assembly and a burner.

Background

In the prior art, in the burner of the conventional gas water heater, the emission amount of NOx gas (nitrogen oxides) is high. The nitrogen oxides can stimulate the lung, making it more difficult for people to fight respiratory diseases such as colds. In addition, nitrogen oxides, mainly nitric oxide and nitrogen dioxide, are an important cause of formation of photochemical smog and acid rain. Photochemical smog has special smell, stimulates eyes, hurts plants, and can reduce the atmospheric visibility. Therefore, the burner of the traditional gas water heater generates more NOx gas, which is not beneficial to environmental protection.

In order to solve the above problems, the burner provided in the prior art has two injection channels, wherein one injection channel is used for injecting a thick flame mixed gas, and the other injection channel is used for injecting a thin flame mixed gas, and the mixed gas of fuel gas and air is divided into a thick flame mixed gas and a thin flame mixed gas according to the mixing proportion, and although the two injection channels respectively introduce the mixed gas with different concentrations to reduce the NOx gas generated by combustion, the following defects exist: the two injection channels are arranged up and down to increase the manufacturing difficulty of the die, and meanwhile, the gas entering the two injection channels needs to be mixed in advance, so that the problem of insufficient combustion exists when the head of the fire grate body is burnt.

Disclosure of utility model

One of the technical problems to be solved by the utility model is to provide a fire grate assembly which can fully burn fuel gas.

The second technical problem to be solved by the utility model is to provide a burner which can ensure that the fuel gas is fully combusted.

The first technical problem is solved by the following technical scheme:

a fire grate assembly comprising:

The fire grate body is provided with an injection channel and a mixing channel which are communicated, the side wall of the fire grate body is provided with a fuel gas diversion hole, and the fuel gas diversion hole is communicated with the mixing channel;

The outer shell is fixedly arranged on two sides of the fire grate body, a gap exists between the fire grate body and the outer shell, a light flame cavity is formed, and the outer shell is provided with a plurality of air inlet holes communicated with the light flame cavity;

The flow dividing piece is arranged in the fire grate body and is positioned at the upper part of the mixing channel, and the flow dividing piece divides the fire grate body into two thick flame cavities.

Compared with the background technology, the fire grate assembly has the beneficial effects that:

The gas diversion holes are communicated with the mixing channel, so that after entering the cavity formed by the fire grate body and the diversion piece from the mixing channel, the mixed gas is firstly led into the thick flame cavity, at the moment, the content of the gas in the mixed gas in the thick flame cavity is high, as the gas diversion holes are arranged on the side wall of the fire grate body, the high-concentration mixed gas flows into the light flame cavity from the gas diversion holes, the air inlet holes are formed in the outer shell, and at the moment, the mixed gas in the light flame cavity is secondarily mixed with the air, so that the content of the gas is correspondingly reduced. The shell body is provided with the air inlet, can reduce the gas content in the mixed gas, reduces the combustion heat and then reduces nitrogen oxide's formation, sets up the air inlet on the upper portion of subassembly is arranged to the fire simultaneously, can provide more air for the post combustion of gas, and then improves combustion quality, makes the gas can fully burn.

In one embodiment, the splitter comprises two splitter plates arranged oppositely, each splitter plate is provided with a plurality of bending parts arranged at intervals along the length direction of the splitter plate, and the corresponding bending parts of the two splitter plates are mutually adhered and divide the space enclosed by the splitter into a plurality of main flame cavities.

In one embodiment, the height of the bottom surface of the flow divider is lower than the height of the gas flow divider aperture.

In one embodiment, the air inlet is lower than the gas distribution holes.

In one embodiment, the side surface of the outer shell is further provided with a guide plate, a plurality of guide plates are arranged in one-to-one correspondence with a plurality of air inlet holes, the guide plates cover the corresponding air inlet holes, and the lower part of the guide plate is provided with an air inlet communicated with the air inlet holes.

In one embodiment, the baffle is integrally formed with the outer housing.

In one embodiment, the fire grate assembly further comprises a plurality of connecting pieces, and two ends of each connecting piece are respectively connected with the two outer shells.

In one embodiment, two injection channels are arranged, inlets of the two injection channels are arranged at intervals relatively, and the two injection channels are communicated with the mixing channel.

In one embodiment, the side wall of the fire grate body is gradually closed from bottom to top towards the direction close to the middle of the fire grate body to form a second-stage step, the lower part of the outer shell is abutted to the initial bending part of the second-stage step, and the inner wall of the outer shell is attached to the second flat surface of the second-stage step.

The second technical problem is solved by the following technical scheme:

A burner comprising a plurality of fire grate assemblies as claimed in any one of the preceding aspects arranged side by side.

Compared with the background technology, the burner has the beneficial effects that:

The burner provided by the utility model has all the advantages and beneficial effects of the fire grate assembly, which are not repeated here.

Drawings

FIG. 1 is a schematic view of a fire grate assembly according to an embodiment of the present utility model;

FIG. 2 is a front view of a fire grate assembly provided in an embodiment of the present utility model;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 3 at B;

Fig. 5 is a schematic structural diagram of a fire grate body according to an embodiment of the present utility model;

Fig. 6 is a schematic structural diagram of a diverter according to an embodiment of the present utility model.

Description of the reference numerals:

1. a fire grate body; 11. fire discharging shell; 111. a gas diversion hole; 12. a connecting sheet; 13. a second step; 131. starting a bending part; 132. a second planar surface; 2. an outer housing; 21. an air inlet; 3. a shunt; 31. a diverter plate; 311. a bending part; 301. a main flame chamber; 4. a deflector; 101. an injection channel; 102. a mixing channel; 103. a thick flame chamber; 104. a light flame chamber.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying 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 application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, 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. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 6, the present utility model provides a fire grate assembly capable of reducing the concentration of NOx and ensuring sufficient combustion of fuel gas.

As shown in fig. 1 to 4, the fire grate assembly comprises a fire grate body 1, an outer shell 2 and a flow dividing piece 3, wherein the fire grate body 1 is provided with an injection channel 101 and a mixing channel 102 which are communicated, the side wall of the fire grate body 1 is provided with a fuel gas flow dividing hole 111, and the fuel gas flow dividing hole 111 is communicated with the mixing channel 102; the outer shell 2 is fixedly arranged on two sides of the fire grate body 1, a gap exists between the fire grate body 1 and the outer shell 2, a light flame cavity 104 is formed, and the outer shell 2 is provided with a plurality of air inlet holes 21 communicated with the light flame cavity 104; the splitter 3 is disposed in the flame row body 1 at an upper portion of the mixing channel 102, and the splitter 3 partitions the flame row body 1 into two thick flame chambers 103. Since the thick flame chamber 103 and the thin flame chamber 104 are formed between the splitter 3, the outer case 2 and the flame row body 1, the purpose of suppressing the generation of NOx during combustion can be achieved.

The gas flow dividing hole 111 is communicated with the mixing channel 102, so that after entering the cavity formed by the flame row body 1 and the flow dividing piece 3 from the mixing channel 102, the mixed gas is firstly guided into the thick flame cavity 103, at this time, the content of the gas in the mixed gas in the thick flame cavity 103 is high, as the gas flow dividing hole 111 is arranged on the side wall of the flame row body 1, the high-concentration mixed gas flows into the thin flame cavity 104 from the gas flow dividing hole 111, the air inlet 21 is arranged on the outer shell 2, at this time, the mixed gas in the thin flame cavity 104 is secondarily mixed with the air, and the content of the gas is correspondingly reduced. The shell body 2 is provided with the air inlet 21, can reduce the gas content in the mixed gas, reduces the combustion heat and then reduces the formation of nitrogen oxide, sets up the air inlet 21 in the upper portion of fire row subassembly simultaneously, can provide more air for the post combustion of gas, and then improves combustion quality, makes the gas can fully burn.

With continued reference to fig. 1 and 3, the fire grate assembly further includes a plurality of connecting tabs 12, each connecting tab 12 being connected at each end to two outer housings 2, the plurality of connecting tabs 12 dividing each of the rich flame chamber 103 and the lean flame chamber 104 into a plurality of segments. Thus, the thick flame chamber 103 and the thin flame chamber 104 can be divided into a plurality of sections, so that the heat dissipation area of the flame can be increased, the flame temperature can be reduced, and the concentration of nitrogen oxides can be further reduced.

In some embodiments, the height of the bottom surface of the splitter 3 is lower than the height of the bottom surface of the gas splitter bore 111. By the arrangement, the mixed gas can be prevented from directly flowing out of the gas diversion holes 111 without being diverted by the diversion plate 31, so that the excessive mixed gas quantity entering the light flame cavity 104 is avoided, the mixed gas quantity of the thick flame cavity 103 is small to cause thermal recombination, and the mixed gas is uniformly introduced into different combustion holes to be combusted.

As shown in connection with fig. 1 and 4, a plurality of main flame cavities 301 are provided in the splitter 3. The main flame cavity 301 is communicated with the mixing channel 102, after the fuel gas and the air are mixed from the air-fuel gas mixing cavity, through the flow division of the flow dividing piece 3, one part of the mixed gas enters the main flame cavity 301 to participate in combustion, and the other part of the mixed gas enters the thick flame cavity 103 to participate in combustion, and as the fire grate body 1 is provided with the fuel gas flow dividing hole 111, the mixed gas in the thick flame cavity 103 flows out from the fuel gas flow dividing hole 111 to enter the thin flame cavity 104, and the air inlet hole 21 of the outer shell 2 achieves the aim of secondarily entering the air, so that the mixed gas can be fully combusted to reduce the concentration of NOx.

In some embodiments, as shown in fig. 4, the side wall of the fire grate body 1 gradually approaches to the middle of the fire grate body 1 from bottom to top to form a secondary step 13, the lower part of the outer shell 2 is abutted with the initial bending part 131 of the secondary step 13, and the inner wall of the outer shell 2 is abutted with the second flat surface 132 of the secondary step 13. In order to ensure the space volume of the light flame cavity 104, the side walls need to be gradually closed from bottom to top towards the direction close to the middle of the fire grate body 1 to form a secondary step 13, so that the volume of the light flame cavity 104 can be ensured, and the mixed gas and air can be secondarily mixed after entering, so that light flame is generated by combustion.

The air inlet 21 has a height lower than that of the gas distribution hole 111. This mixes more air before combustion, reducing the heat of combustion and thus the concentration of NOx.

In order to achieve the air diversion, in some embodiments, the side surface of the outer casing 2 is further provided with a diversion plate 4, the diversion plates 4 are arranged in one-to-one correspondence with the air inlet holes 21, the diversion plate 4 covers the corresponding air inlet holes 21, and the lower part of the diversion plate 4 is provided with an air inlet communicated with the air inlet holes 21, so that the arrangement can block the mixed gas from flowing out, and meanwhile, the air can enter from the bottom, so that the oxygen content in the air is improved.

For example, the baffle 4 is integrally formed with the outer housing 2, which improves the manufacturing efficiency of the outer housing 2.

In some embodiments, as shown in fig. 5, the gas flow dividing holes 111 are arranged in a row along the length direction of the fire grate body 1, and the gas flow dividing holes 111 of adjacent two rows are staggered. The gas flow dividing holes 111 are arranged in rows along the length direction of the fire grate body 1, so that the mixed gas can uniformly enter the positions of the light flame cavities 104, and the concentration uniformity of the mixed gas entering the light flame cavities 104 can be further improved due to the staggered arrangement of the gas flow dividing holes 111 of two adjacent rows.

In order to enable a reduction in the number of fire grate components installed under the same thermal load, in some embodiments, two injection channels 101 are provided, the inlets of the two injection channels 101 being spaced apart relative to each other, and each injection channel 101 being in communication with a mixing channel 102. Because the injection channels 101 are opposite and are arranged at intervals, the heat load of the single fire row assembly is larger, so that the number of fire row assemblies installed by the burner under the same heat load can be correspondingly reduced, the use of clamps can be reduced when the burner is integrally installed, and the production efficiency is improved. In addition, the injection channels 101 are opposite and are arranged at intervals, so that the area of the fire hole is increased, the flame is more uniform, the combustion is more stable, and the reduction of the concentration of nitrogen oxides is facilitated.

As shown in fig. 6, the splitter 3 includes two splitter plates 31 disposed opposite to each other, each splitter plate 31 has a plurality of bending portions 311 disposed at intervals along a length direction thereof, and the corresponding bending portions 311 of the two splitter plates 31 are mutually adhered and divide a space defined by the splitter into a plurality of main flame chambers 301. The space enclosed by the flow dividing piece 3 is divided into a plurality of main flame cavities 301, so that the thick flame mixed gas entering the flow dividing piece 3 can be divided into a plurality of airflows, and a plurality of thick flame combustion ports are formed at the top of the fire grate body 1, so that the thick flame mixed gas is divided into a plurality of strands, and the thick flame mixed gas is more orderly and stable in combustion.

In an embodiment of the present utility model, there is also provided a burner comprising a housing and a plurality of fire grate assemblies as provided in the above embodiment disposed side by side, wherein the fire grate assemblies are disposed within the housing.

The burner according to the embodiment of the present utility model has all the advantages and benefits of the fire grate assembly provided by the above embodiment, and will not be described in detail herein.

In the specific content of the above embodiment, any combination of the technical features may be performed without contradiction, and for brevity of description, all possible combinations of the technical features are not described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing detailed description of the embodiments presents only a few embodiments of the present utility model, which are described in some detail and are not intended to limit the scope of the present utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A fire grate assembly, comprising:

The fire grate comprises a fire grate body (1), wherein the fire grate body (1) is provided with an injection channel (101) and a mixing channel (102) which are communicated, the side wall of the fire grate body (1) is provided with a fuel gas diversion hole (111), and the fuel gas diversion hole (111) is communicated with the mixing channel (102);

The fire grate comprises an outer shell (2) fixedly arranged on two sides of a fire grate body (1), a gap is reserved between the fire grate body (1) and the outer shell (2) and a light flame cavity (104) is formed, and the outer shell (2) is provided with a plurality of air inlet holes (21) communicated with the light flame cavity (104);

The flow dividing piece (3) is arranged in the fire grate body (1) and is positioned at the upper part of the mixing channel (102), and the flow dividing piece (3) divides the fire grate body (1) into two thick flame cavities (103).

2. A fire grate assembly as claimed in claim 1, wherein the flow divider (3) comprises two oppositely disposed flow divider plates (31), each flow divider plate (31) having a plurality of bent portions (311) disposed at intervals along its length, the corresponding bent portions (311) of the two flow divider plates (31) being mutually engaged and separating the space enclosed by the flow divider (3) and forming a plurality of main flame chambers (301).

3. Fire grate assembly according to claim 1, characterized in that the bottom surface of the flow divider (3) is lower than the height of the gas flow divider holes (111).

4. Fire grate assembly according to claim 1, characterized in that the air inlet openings (21) are of a lower height than the gas distribution openings (111).

5. The fire grate assembly according to claim 1, wherein a deflector (4) is further arranged on the side surface of the outer shell (2), a plurality of deflectors (4) are arranged in one-to-one correspondence with a plurality of air inlet holes (21), the deflector (4) covers the corresponding air inlet holes (21), and an air inlet communicated with the air inlet holes (21) is formed in the lower portion of the deflector (4).

6. Fire grate assembly according to claim 5, characterized in that the deflector (4) is integrally formed with the outer housing (2).

7. Fire grate assembly according to claim 1, characterized in that it further comprises a plurality of connection pieces (12), each connection piece (12) being connected at both ends to two outer shells (2).

8. The fire grate assembly according to claim 2, wherein two injection channels (101) are arranged, inlets of the two injection channels (101) are arranged at opposite intervals, and the two injection channels (101) are communicated with the mixing channel (102).

9. Fire grate assembly according to claim 2, characterized in that the side wall of the fire grate body (1) gradually closes from bottom to top towards the direction close to the middle of the fire grate body (1) and forms a secondary step (13), the lower part of the outer shell (2) is abutted with the initial bending part (131) of the secondary step (13), and the inner wall of the outer shell (2) is abutted with the second flat surface (132) of the secondary step (13).

10. A burner comprising a plurality of fire grate assemblies as claimed in any one of claims 1 to 9 arranged side by side.