CN217519853U - Combustor and combustion equipment - Google Patents

Abstract

The application provides a combustor and combustion apparatus belongs to combustion apparatus technical field. The combustor comprises a shell, a porous medium combustion piece and a gas collecting cover; the shell is provided with an air inlet and an air outlet; the porous medium combustion piece is accommodated in the shell and is positioned between the air inlet and the air outlet; the air inlet end of the air collecting cover is communicated with the air outlet, the air outlet end of the air collecting cover is positioned on one side of the air inlet end, which is far away from the air outlet, and the cross-sectional area of the air flow cavity in the air collecting cover at the air outlet end is smaller than that at the air inlet end. The combustor can improve the flow velocity of outlet flue gas, so that the requirement of larger flow velocity of outlet flue gas can be better met.

Description

Combustor and combustion equipment

Technical Field

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

Background

Compared with free combustion, the porous medium combustion has the advantages of high combustion rate, good combustion stability, large load regulation range, large heat accumulation intensity, small volume of the combustor, good gas adaptability, low pollutant discharge in flue gas, wide combustion limit, combustible gas with very low heat value and the like, so that the porous medium combustor is increasingly widely applied.

In some specific heating scenarios, a larger outlet flue gas flow rate is required, and the existing porous medium burner is generally difficult to meet the requirement of the larger outlet flue gas flow rate.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a combustor and combustion apparatus, can improve the export flue gas velocity of flow to can satisfy the demand of great export flue gas velocity of flow better.

The embodiment of the application is realized as follows:

in a first aspect, an embodiment of the present application provides a combustor, including: the device comprises a shell, a porous medium combustion piece and a gas collecting cover; the shell is provided with an air inlet and an air outlet; the porous medium combustion piece is accommodated in the shell and positioned between the air inlet and the air outlet; the air inlet end of the air collecting cover is communicated with the air outlet, the air outlet end of the air collecting cover is positioned on one side of the air inlet end, which is far away from the air outlet, and the cross-sectional area of the air flow cavity in the air collecting cover at the air outlet end is smaller than that at the air inlet end.

In the technical scheme, the gas collecting cover is additionally arranged, and the gas inlet end of the gas collecting cover is communicated with the gas outlet of the shell, so that high-temperature flue gas generated after combustion is sprayed out through the gas collecting cover. Because the cross-sectional area of the airflow cavity of the gas receiving cover at the gas outlet end is smaller than that of the gas inlet end, the flow velocity of the flue gas at the gas outlet end is greater than that of the flue gas at the gas inlet end, so that the flow velocity of the flue gas at the outlet end can be increased, and the requirement of larger flow velocity of the flue gas at the outlet can be better met.

In some alternative embodiments, the gas collecting cover is a revolving body structure, and the inner diameter of the gas outlet end is smaller than that of the gas inlet end.

Among the above-mentioned technical scheme, will receive the gas cover and prepare the form for the solid of revolution, can effectively realize the regulation of cross-sectional area through regulation and control internal diameter for cross-sectional area change degree and the corresponding exhaust velocity change degree of degree are adjusted conveniently, and the structure shaping is convenient.

In some alternative embodiments, the ratio of the inner diameter of the gas inlet end to the inner diameter of the gas outlet end is ≦ 2.

Among the above-mentioned technical scheme, the internal diameter of the end of admitting air and the internal diameter of the end of giving vent to anger are controlled in certain proportion, when effectively improving export flue gas velocity of flow, are favorable to discharging the flue gas more steadily.

In some alternative embodiments, the inner diameter of the gas-collecting hood gradually decreases from the gas inlet end to the gas outlet end.

In the technical scheme, the structure is convenient to form in a mode that the inner diameter of the gas collecting cover is gradually reduced; moreover, the flow velocity of the flue gas is gradually increased, which is beneficial to discharging the flue gas more stably.

In some alternative embodiments, the gas-collecting hood is a cone-shaped structure.

Among the above-mentioned technical scheme, the toper structure satisfies when receiving the gas cover internal diameter and reduce gradually, and the structure shaping is more convenient.

In some alternative embodiments, the included angle between the generatrix of the gas-collecting hood and the axis is alpha, and alpha is more than 0 degrees and less than or equal to 30 degrees.

Among the above-mentioned technical scheme, receive the generating line of gas cover and the contained angle control of axis in certain standard, receive under the circumstances that the gas cover internal diameter reduces gradually, avoid receiving the internal diameter change of gas cover too fast, be favorable to discharging the flue gas more steadily.

In some optional embodiments, the porous medium combustion piece comprises an upstream piece, a downstream piece and an annular heat insulation layer, wherein the downstream piece is embedded in the annular heat insulation layer, and the upstream piece is abutted against one end of the annular heat insulation layer close to the air inlet.

Among the above-mentioned technical scheme, through upper reaches piece, low reaches piece and the cooperation of annular heat preservation for porous medium burning piece can burn better.

In some optional embodiments, a first flange is convexly arranged on the inner wall of one end of the annular heat-insulating layer close to the air outlet, a second flange is convexly arranged on the outer wall of the air inlet end, and the second flange is clamped between the downstream sheet and the first flange.

Among the above-mentioned technical scheme, with the second flange centre gripping between low reaches piece and first flange to realize receiving the intercommunication of the inlet end of gas cover and the gas outlet of casing, receive the connection of gas cover simple, and can effectively avoid receiving the inlet end of gas cover and appear leaking gas the problem.

In some optional embodiments, the gas collecting cover is made of a high-temperature-resistant and oxidation-resistant material.

Among the above-mentioned technical scheme, receive the gas cover and make by high temperature resistant anti-oxidant material, can adapt to operational environment better, guarantee to have longer life.

In some alternative embodiments, the gas-collecting hood is made of 310s stainless steel or polycrystalline silicon carbide.

In the technical scheme, the gas collecting cover is made of 310s stainless steel or polycrystalline silicon carbide, materials are easy to obtain, and the gas collecting cover has good high-temperature resistance and oxidation resistance.

In a second aspect, an embodiment of the present application provides a combustion apparatus, including: the device comprises a device main body, a burner and an air supply unit, wherein the burner is provided according to the embodiment of the first aspect; the shell is connected with the equipment main body; the air supply unit is communicated with the air inlet.

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 structural diagram of a combustor provided in an embodiment of the present application;

fig. 2 is a schematic cross-sectional structure view of a first gas collecting cover according to an embodiment of the present disclosure;

FIG. 3 is a schematic cross-sectional view of a second gas-collecting hood according to an embodiment of the present disclosure;

FIG. 4 is a schematic cross-sectional view of a third gas-collecting hood according to an embodiment of the present disclosure;

FIG. 5 is a schematic cross-sectional view of a fourth gas-collecting hood according to an embodiment of the present disclosure;

fig. 6 is a schematic cross-sectional structure view of a fifth gas collecting cover according to an embodiment of the present application.

Icon:

100-a burner;

110-a housing; 111-a stationary housing; 1111-air inlet; 1112-an air intake chamber; 1113-air distribution plate; 112-a combustion housing; 1121-gas outlet;

120-a porous media combustion element; 121-upstream sheet; 122-a downstream sheet; 123-annular heat insulation layer; 1231-a first flange;

130-gas receiving cover; 131-an air inlet end; 1311-a second flange; 132-outlet end.

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, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it is to be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally laid out when products of the application are used, and are only used for convenience in describing the application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application.

Furthermore, the terms "first," "second," "third," "fourth," "fifth," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "perpendicular", "parallel", and the like do not require that the components be absolutely perpendicular or parallel, but may be slightly inclined.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

In a first aspect, referring to fig. 1, an embodiment of the present application provides a combustor 100, including: a housing 110, a porous medium combustion member 120 and a gas-collecting cover 130. Housing 110 has an air inlet 1111 and an air outlet 1121. The porous medium combustion element 120 is housed in the casing 110 between the air inlet 1111 and the air outlet 1121. The air inlet end 131 of the air collecting cover 130 is communicated with the air outlet 1121, the air outlet end 132 of the air collecting cover 130 is located on one side of the air inlet end 131 far away from the air outlet 1121, and the cross-sectional area of the air flow cavity in the air collecting cover 130 at the air outlet end 132 is smaller than that at the air inlet end 131.

The air inlet 1111 of the casing 110 is used for being communicated with an air supply unit and introducing mixed gas of fuel gas and combustion-supporting gas into the casing 110. The air outlet 1121 of the housing 110 is used for discharging flue gas and the like generated by combustion at the porous medium combustion element 120, and for facilitating combustion, the porous medium combustion element 120 is exemplarily disposed close to the air outlet 1121 of the housing 110, for example, inside the air outlet 1121.

As an example, the housing 110 includes a stationary housing 110 and a combustion housing 112, and the stationary housing 110 and the combustion housing 112 communicate with each other. The air inlet 1111 is opened in the fixed casing 110, and an air inlet cavity 1112 is formed inside the fixed casing 110; the air outlet 1121 is opened to the combustion casing 112, and the porous medium combustion element 120 is accommodated in the combustion casing 112.

Alternatively, the air inlet 1111 is opened at a side of the stationary housing 110 away from the combustion housing 112, the air outlet 1121 is opened at a side of the combustion housing 112 away from the stationary housing 110, and the air inlet 1111 and the air outlet 1121 are coaxially arranged along a predetermined direction. Further, an air distribution plate 1113 is disposed in the air inlet cavity 1112, the air distribution plate 1113 is, for example, a porous plate, and the air distribution plate 1113 is connected to the fixed housing 110 and is distributed in a predetermined direction like the air inlet 1111, so as to better distribute air uniformly to the porous medium combustion element 120.

The porous medium combustion member 120 has a porous combustion material layer for ventilation and combustion.

As an example, the porous medium combustion member 120 comprises an upstream sheet 121, a downstream sheet 122 and an annular insulating layer 123, wherein the downstream sheet 122 is embedded in the annular insulating layer 123, and the upstream sheet 121 abuts against one end of the annular insulating layer 123 close to the air inlet 1111. In this design, the porous medium combustion member 120 can be well combusted by the cooperation of the upstream sheet 121, the downstream sheet 122 and the annular insulating layer 123.

In the present application, the materials, the porosity specifications, and the like of the upstream sheet 121, the downstream sheet 122, and the annular insulating layer 123 may be selected according to conventional standards. In addition, the porous medium combustion member 120 may be configured according to the combustion needs, and in other embodiments, for example, only the downstream sheet 122 and the annular insulating layer 123 may be provided.

The gas-receiving cover 130 is a ring structure having a gas flow cavity therein and two open ends, namely a gas inlet end 131 and a gas outlet end 132.

As an example, the gas collecting cover 130 is a central symmetrical structure, and the gas inlet end 131 and the gas outlet end 132 are coaxially disposed and also distributed along a predetermined direction for better gas discharge.

According to the combustor 100 provided by the application, the gas collecting cover 130 is additionally arranged, and the gas inlet end 131 of the gas collecting cover 130 is communicated with the gas outlet 1121 of the shell 110, so that high-temperature flue gas generated after combustion is ejected out through the gas collecting cover 130. Because the cross-sectional area of the airflow cavity of the gas receiving cover 130 at the gas outlet end 132 is smaller than that at the gas inlet end 131, the flow rate of the flue gas at the gas outlet end 132 is greater than that at the gas inlet end 131, so that the flow rate of the flue gas at the outlet end can be increased, and the requirement of a larger flow rate of the flue gas at the outlet can be better met.

In the present application, the fixing manner of the air collecting hood 130 is not limited as long as the air collecting hood 130 can be fixed and the air inlet end 131 of the air collecting hood 130 can communicate with the air outlet 1121 of the housing 110. The air collecting cover 130 may be fixedly or detachably connected to the housing 110, for example, fixedly or detachably connected to the air outlet 1121 of the housing 110; it may also be fixedly or removably attached to the porous media combustion element 120.

Referring to fig. 1, as an example, a first flange 1231 is convexly provided on an inner wall of the annular insulating layer 123 near the air outlet 1121, a second flange 1311 is convexly provided on an outer wall of the air inlet 131, and the second flange 1311 is sandwiched between the downstream sheet 122 and the first flange 1231.

In this design, the second flange 1311 is clamped between the downstream sheet 122 and the first flange 1231 to communicate the air inlet end 131 of the air-receiving cover 130 with the air outlet 1121 of the housing 110, so that the air-receiving cover 130 is simply connected, and the air leakage problem at the air inlet end 131 of the air-receiving cover 130 can be effectively avoided.

Considering that the temperature of the working environment of the gas collecting cover 130 is relatively high, as an example, the material of the gas collecting cover 130 is a high temperature resistant and oxidation resistant material.

In the design, the gas collecting cover 130 is made of high-temperature-resistant and anti-oxidation materials, so that the gas collecting cover can be well adapted to the working environment, and the service life is ensured to be longer.

Further, the gas collecting cover 130 is made of 310s stainless steel or polycrystalline silicon carbide.

In the design, 310s stainless steel or polycrystalline silicon carbide is selected to manufacture the gas receiving cover 130, the material is easy to obtain, and the gas receiving cover 130 has good high-temperature resistance and oxidation resistance.

It should be noted that, in the present application, the arrangement form of the cross-sectional area of the airflow cavity in the gas collecting cover 130 at the gas outlet end 132 being smaller than the cross-sectional area at the gas inlet end 131 is not limited, and the gas collecting cover 130 may be configured as a revolving structure and the inner diameter of the gas outlet end 132 may be reduced, or a flow-blocking bump, a baffle, or the like may be arranged at the gas outlet end 132 to reduce the cross-sectional area of the gas outlet end 132.

As an example, the gas collecting cover 130 is a solid of revolution, and the inner diameter of the gas outlet end 132 is smaller than that of the gas inlet end 131.

In the design, the gas receiving cover 130 is prepared into a rotary body form, and the adjustment of the cross sectional area can be effectively realized by regulating and controlling the inner diameter, so that the adjustment of the change degree of the cross sectional area and the corresponding change degree of the exhaust speed is convenient, and the structure forming is convenient.

It can be understood that, with respect to the gas collecting cover 130 provided by the present application, the larger the ratio of the inner diameter of the gas inlet end 131 to the inner diameter of the gas outlet end 132, the higher the degree of increase of the outlet flue gas flow rate by the gas collecting cover 130. However, when the degree of increase in the outlet flue gas flow rate is too high, there may be a certain influence on the stability of the discharged flue gas, and therefore, the degree of increase in the outlet flue gas flow rate needs to be controlled within a certain standard.

As an example, the ratio of the inner diameter of inlet end 131 to the inner diameter of outlet end 132 is ≦ 2, such as, but not limited to, any one of 1.2, 1.5, 1.8, and 2, or a range between any two.

In this design, the internal diameter of inlet end 131 and the internal diameter of the end 132 of giving vent to anger are controlled in certain proportion, when effectively improving export flue gas velocity of flow, are favorable to discharging the flue gas more stably.

In the present application, when the gas collecting cover 130 is arranged in a revolving structure, the shape of the gas collecting cover 130 is not limited as long as the inner diameter of the gas outlet end 132 is smaller than the inner diameter of the gas inlet end 131.

Referring to fig. 2-5, the inner diameter of the gas-receiving enclosure 130 illustratively decreases from the gas inlet end 131 to the gas outlet end 132.

In the design, the structure is convenient to form in a mode that the inner diameter of the gas collecting cover 130 is gradually reduced; moreover, the flow velocity of the flue gas is gradually increased, which is beneficial to discharging the flue gas more stably.

Referring to fig. 2, as a first example, the gas trap cover 130 has a cone-shaped structure.

In the design, the conical structure can meet the requirement that the inner diameter of the gas collecting cover 130 is gradually reduced, and meanwhile, the structure is more convenient to form.

Furthermore, the included angle between the generatrix of the gas-collecting hood 130 and the axis is alpha, alpha is more than 0 degree and less than or equal to 30 degrees, namely the included angle between the generatrix of the gas-collecting hood 130 and the surface of the downstream piece 122 is more than or equal to 60 degrees and less than 90 degrees.

In this design, receive the generating line of gas cover 130 and the contained angle control of axis in certain standard, receive under the condition that gas cover 130 internal diameter reduces gradually, avoid receiving the internal diameter change of gas cover 130 too fast, be favorable to discharging the flue gas more steadily.

Of course, the inner diameter of the gas-collecting hood 130 is not limited to be gradually reduced, and the inner wall of the gas-collecting hood 130 may be a straight line, a smooth arc line or a plurality of arc lines in terms of the shape of the generatrix; from the outer diameter of the gas collecting cover 130, the outer diameter of the gas collecting cover 130 may gradually decrease as the inner diameter changes in the direction from the gas inlet end 131 to the gas outlet end 132, and the outer diameter of the gas collecting cover 130 may also be kept constant.

Referring to fig. 3, as a second example, a generatrix of the inner wall of the gas trap cover 130 is a rounded arc line and protrudes toward the inside of the gas trap cover 130.

Referring to fig. 4, as a third example, a generatrix of the inner wall of the gas trap cover 130 is a rounded arc line and protrudes toward the outside of the gas trap cover 130.

Referring to fig. 5, as a fourth example, the inner wall of the gas collecting cover 130 is tapered; the outer diameter of the gas receiving cover 130 is maintained in a direction from the gas inlet end 131 to the gas outlet end 132.

In this application, except for the way that the inner diameter of the gas-collecting cover 130 is gradually reduced, in other embodiments, the inner diameter of the gas-collecting cover 130 may be reduced only at the gas outlet end 132 in the direction from the gas inlet end 131 to the gas outlet end 132, and the inner wall of the gas-collecting cover 130 is in the shape of a two-step; the inner diameter of the gas-collecting cover 130 can also be suddenly reduced and kept unchanged for a plurality of times, and the inner wall of the gas-collecting cover 130 is in a multi-stage step shape at the moment; the inner diameter of the gas-collecting cover 130 may be gradually increased and then gradually decreased.

Referring to fig. 6, as a fifth example, the inner wall of the gas collecting cover 130 has a multi-step shape, and the inner diameter of the gas collecting cover 130 is gradually increased and then kept constant, and then gradually increased and then kept constant, and is cycled for a plurality of times.

In a second aspect, embodiments of the present application provide a combustion apparatus (not shown), including: an apparatus main body, a burner 100 as provided in the first aspect embodiment, and an air supply unit; the housing 110 is connected to the apparatus main body; the air supply unit communicates with the air inlet 1111.

In some exemplary embodiments, the housing 110 is connected to the apparatus main body through the fixed case 111.

As an example, the combustion device is a toaster.

As an example, the combustion device is an industrial furnace, for example of the larger furnace type.

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, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A burner, comprising:

a housing having an air inlet and an air outlet;

the porous medium combustion piece is accommodated in the shell and positioned between the air inlet and the air outlet; and

the air inlet end of the air collecting cover is communicated with the air outlet, the air outlet end of the air collecting cover is positioned on one side, far away from the air outlet, of the air inlet end, and the cross-sectional area of an air flow cavity in the air collecting cover at the air outlet end is smaller than that at the air inlet end.

2. The burner of claim 1, wherein the gas collecting cover is of a rotary structure, and the inner diameter of the gas outlet end is smaller than that of the gas inlet end.

3. The burner of claim 2, wherein the ratio of the inner diameter of the gas inlet end to the inner diameter of the gas outlet end is ≤ 2.

4. A burner according to claim 2 or 3, wherein the inner diameter of the gas-receiving enclosure decreases from the gas inlet end to the gas outlet end.

5. The burner of claim 4 wherein the gas-collecting hood is of a cone-type construction.

6. The burner of claim 5, wherein the angle between the generatrix of the gas-collecting hood and the axis is α, 0 ° < α ≦ 30 °.

7. The burner of claim 1, wherein the porous medium combustion element comprises an upstream piece, a downstream piece and an annular insulating layer, the downstream piece is embedded in the annular insulating layer, and the upstream piece abuts against one end of the annular insulating layer close to the air inlet.

8. The burner of claim 7, wherein a first flange is convexly arranged on the inner wall of one end of the annular insulating layer close to the air outlet, and a second flange is convexly arranged on the outer wall of the air inlet end, and the second flange is clamped between the downstream sheet and the first flange.

9. The burner of claim 1, wherein the gas-collecting hood is made of 310s stainless steel or polycrystalline silicon carbide.

10. A combustion apparatus, comprising:

an apparatus main body;

the burner as claimed in any one of claims 1 to 9, wherein the housing is connected to the apparatus main body; and

and the air supply unit is communicated with the air inlet.

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