CN217635620U - Combustion device - Google Patents

Abstract

The application provides a combustion apparatus, relates to porous medium burning technical field. The combustion device comprises a first combustor and a second combustor. The first combustor is annularly arranged, and the first combustor is provided with an inner ring surface which is enclosed to form a mounting through hole and a combustion surface for discharging smoke and heat. The second combustor is independently controlled with the first combustor, the second combustor is provided with an ignition electrode, a combustor body and a combustion head, the combustor body and the combustion head are coaxially connected, and the ignition electrode is used for igniting the combustion head. The combustor body is worn to locate in first combustor through the installation through-hole, and the burner head is located the combustion face outward, and the burner head is configured to can ignite the combustion face. On the basis of meeting the requirement of low nitrogen emission, the technical problem of low combustion efficiency of the combustor can be solved.

Description

Combustion device

Technical Field

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

Background

At present, in order to realize low nitrogen emission, a metal porous medium burner is generally adopted in a combustion device for low nitrogen emission, but the power of the burner is large, but the power regulation range is small, so that the start and stop of the combustion device are frequent, and the combustion efficiency is low.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide a combustion apparatus, it is on satisfying the basis that low nitrogen discharged, can solve the technical problem that combustor combustion efficiency is low.

The embodiment of the application provides a combustion device, which comprises a first combustor and a second combustor.

The first combustor is annularly arranged, and the first combustor is provided with an inner ring surface which is enclosed to form a mounting through hole and a combustion surface for discharging smoke and heat. The second combustor is independently controlled with the first combustor, the second combustor is provided with an ignition electrode, a combustor body and a combustion head, the combustor body and the combustion head are coaxially connected, and the ignition electrode is used for igniting the combustion head.

Wherein, the combustor body is worn to locate in first combustor through the installation through-hole, and the burner is located the combustion face outward, and the burner is configured to can ignite the combustion face.

In the implementation process, the second combustor is arranged in the first combustor in a penetrating mode and can ignite the first combustor, so that the combustion device is compact in structure and high in space utilization, a high-temperature area (a space limited by a combustion surface and a combustion head) is provided for mutual combustion by utilizing the first combustor and the second combustor, sufficient combustion is guaranteed to achieve low NOx emission, and meanwhile, the combustion efficiency is effectively improved.

In one possible embodiment, the second burner is a metal porous medium burner, the peripheral wall of the burner head having apertures through its surface for releasing the flame outwardly.

In the above-mentioned realization process, be the setting of metal porous medium combustor through the second combustor, utilize its own porous setting to be favorable to the gas mixture (gas and combustion-supporting gas mixture to obtain) fully to burn on the one hand, reduce NOx's emission, on the other hand is because it can produce the naked light, consequently can be convenient for ignite first combustor according to actual demand, when first combustor and second combustor all burn simultaneously, the flue gas of self-combustion face output can be further carried out the postcombustion by naked light and the heat that the combustion head produced in the high temperature region, be favorable to improving combustion efficiency, further reduce NOx's emission simultaneously.

In one possible embodiment, the first burner is a ceramic porous medium burner.

In the implementation process, the first combustor is used as the ceramic porous medium combustor, and the porous arrangement of the first combustor is favorable for full combustion of mixed gas (obtained by mixing fuel gas and combustion-supporting gas) and reduction of NOx emission. Meanwhile, the power of the common metal porous medium burner is large, the power adjusting range is small, the power of the ceramic porous medium burner is small, and the power adjusting range is large, so that the power adjusting range of the combustion device is favorably enlarged when the metal porous medium burner and the ceramic porous medium burner are used in a combined mode.

In a possible embodiment, the combustion device further comprises a combustion-supporting gas supply device, and an air supply outlet of the combustion-supporting gas supply device is respectively communicated with the first combustor and the combustor body.

In the implementation process, the same fuel gas source is used for respectively providing combustion-supporting gas for the first combustor and the second combustor, so that the combustion device is compact in structure, and the utilization rate of the fuel gas source is effectively improved.

In a possible embodiment, the combustion device further comprises a first flow passage and a second flow passage, the air supply outlet of the combustion-supporting air supply device is communicated with the first combustor through the first flow passage, and the air supply outlet of the combustion-supporting air supply device is communicated with the combustor body through the second flow passage.

Wherein, the first runner and/or the second runner are provided with an adjusting air valve capable of adjusting air volume.

In the implementation process, the first flow passage and the second flow passage are respectively communicated with the air supply outlet, and the quantity of the combustion-supporting gas output by the air supply outlet is constant after the parameters are set in the actual use process, so that the quantity of the combustion-supporting gas input into the first combustor and the second combustor can be effectively adjusted no matter the adjusting air valve is arranged in the first flow passage or the second flow passage or the first flow passage and the second flow passage.

In a possible embodiment, the second flow passage is coaxially connected with the burner body, the first flow passage is an annular flow passage, and the first flow passage is arranged around the second flow passage.

In the implementation process, the arrangement that the first flow channel is the annular flow channel is beneficial to uniformly conveying the combustion-supporting gas to the second combustor, is beneficial to uniform combustion of the second combustor for sufficient combustion, and is beneficial to further reducing the nitrogen emission.

In a possible implementation scheme, a first premixing cavity and a gas distribution combustion cavity are sequentially arranged in the first combustor along the gas flow direction, a gas distribution assembly, an upstream sheet and a downstream sheet are sequentially arranged in the gas distribution combustion cavity along the gas flow direction, the combustion surface is located on the surface, far away from the upstream sheet, of the downstream sheet, and the installation through holes sequentially penetrate through the gas distribution assembly, the upstream sheet and the downstream sheet.

In a possible implementation scheme, a second premixing cavity is arranged in the combustor body and used for conveying premixed mixed gas to the combustion head, and gas inlets used for inputting gas are formed in the first premixing cavity and the second premixing cavity respectively.

In the implementation process, the gas inlets are used for respectively providing gas for the first premixing cavity and the second premixing cavity.

In a possible embodiment, the first burner and the second burner are arranged coaxially.

In the implementation process, the coaxial arrangement mode is favorable for the uniformity of secondary combustion of the flue gas output by the second combustor, so that the nitrogen emission is effectively reduced.

In one possible embodiment, a gap is left between the outer wall and the inner annular surface of the burner body, which gap is used for mounting the ignition electrode.

In the implementation process, the structure is compact, and the problem that the first combustor is in direct contact with the second combustor, and the gas temperature is too high due to high thermal conductivity, so that backfire can be caused is avoided.

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 cross-sectional view of a combustion apparatus according to an embodiment of the present disclosure.

Icon: 10-a combustion device; 11-a first burner; 111-inner ring surface; 112-gap; 113-a first premix chamber; 114-gas distribution combustion chamber; 115-gas distribution assembly; 116-an upstream sheet; 117-downstream sheet; 118-a combustion surface; 12-a second burner; 121-an ignition electrode; 123-a burner body; 125-a burner head; 127-a second premix chamber; 128-a gas inlet; 13-combustion-supporting gas supply device; 14-a first flow channel; 15-a second flow channel; 151-adjusting air valve; 16-third flow path.

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, 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 should be noted that the terms "center", "upper", "lower", "inner", "outer", and the like refer to orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally used in the product of the present application, and are used for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and operate, and therefore, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

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 the present application can be understood in a specific case by those of ordinary skill in the art.

Examples

Referring to fig. 1, a combustion apparatus 10 includes a first burner 11 and a second burner 12 which are independently controlled, wherein the second burner 12 is used for igniting the first burner 11.

The first burner 11 is annularly arranged, the first burner 11 is provided with an inner annular surface 111 enclosing to form a mounting through hole and a combustion surface 118 for discharging smoke and heat, the second burner 12 is provided with an ignition electrode 121, a burner body 123 and a combustion head 125, the burner body 123 and the combustion head 125 are coaxially connected, and the ignition electrode 121 is used for igniting the combustion head 125; the burner body 123 is disposed through the mounting through hole in the first burner 11, the burner head 125 is located outside the combustion surface 118, and the burner head 125 is configured to ignite the combustion surface 118.

Through the arrangement that the second combustor 12 is arranged in the first combustor 11 in a penetrating manner and the second combustor 12 can ignite the first combustor 11, the combustion device 10 is compact in structure and high in space utilization, and meanwhile, a high-temperature area (a space limited by the combustion surface 118 and the combustion head 125) is provided for mutual combustion by utilizing the first combustor 11 and the second combustor 12, so that sufficient combustion is ensured to realize low NOx emission, and meanwhile, the combustion efficiency is effectively improved, and meanwhile, because the second combustor 12 and the first combustor 11 are independently controlled, the first combustor 11 and the second combustor 12 can be independently used or combined to use, so that the power regulation range of the combustion device 10 can be enlarged, and the problem of low combustion efficiency caused by frequent starting and stopping of the combustion device 10 is avoided.

Optionally, a gap 112 is left between the outer wall of the burner body 123 and the inner annular surface 111, the gap 112 being used for mounting the ignition electrode 121.

In order to stably mount the burner body 123 to the mounting through hole without affecting the gap 112, optionally, the outer wall of the burner body 123 is provided with a bracket (not shown) which is sleeved on the circumference of the burner body 123 and is connected with the inner annular surface 111 to support the first burner 11.

Optionally, the combustion apparatus 10 may further include a fire detector (not shown) disposed at the gap 112 for checking whether the combustion head 125 is ignited and whether the combustion surface 118 is ignited.

The first burner 11 and the second burner 12 are both porous medium burners, wherein the porous mediums of the first burner 11 and the second burner 12 can be the same or different; meanwhile, the power adjustment range of the first burner 11 may be greater than that of the second burner 12, and may also be less than that of the second burner 12.

As shown in fig. 1, in the present embodiment, the first burner 11 is a ceramic porous medium burner (the material of the porous medium is ceramic), and the second burner 12 is a metal porous medium burner (the material of the porous medium is metal). At this point, because the burner head 125 is positioned outside the combustion face 118 and the gap 112 is present, the burner head 125 is able to ignite the combustion face 118 without risking flashback of the second combustor 12. The power control range of the first burner 11 is greater than the power control range of the second burner 12. When the two are used together, the power regulation range of the combustion device 10 is further improved, and the full combustion is facilitated.

Optionally, the second burner 12 is a stainless steel plate porous media burner. When the power regulation range of the stainless steel plate porous medium burner is 1:2.5, because the ceramic porous medium burner has a large power adjusting range, and after the ceramic porous medium burner and the ceramic porous medium burner are matched by adopting the structure, the power adjusting range of the combustion device 10 can be increased to 1:50 and NOx emissions lower than 30mg/m ³ The low-nitrogen emission standard is met, and the defect of small power regulation range of the metal porous medium burner can be overcome.

Alternatively, the first burner 11 and the second burner 12 are arranged coaxially.

The first combustor 11 is internally provided with a first premixing cavity 113 and a gas distribution combustion cavity 114 in sequence along the gas flowing direction, a gas distribution assembly 115, an upstream sheet 116 and a downstream sheet 117 are arranged in the gas distribution combustion cavity 114 in sequence along the gas flowing direction, a combustion surface 118 is positioned on one surface of the downstream sheet 117 far away from the upstream sheet 116, and installation through holes sequentially penetrate through the gas distribution assembly 115, the upstream sheet 116 and the downstream sheet 117.

That is, the first premix chamber 113 and the gas distribution combustion chamber 114 are annular, and the gas distribution assembly 115, the upstream plate 116, and the downstream plate 117 are also annular. For ease of assembly, the gas distribution assembly 115, upstream sheet 116, and downstream sheet 117 may be coaxially arranged.

The gas distribution assembly 115 is used for adjusting the velocity of the gas mixture passing through the gas distribution assembly, and uniformly and substantially uniformly distributing the gas mixture to the downstream sheet 117, the downstream sheet 117 is a porous medium ceramic layer for combustion of the gas mixture, and the upstream sheet 116 is a heat-resistant porous plate for limiting the flow rate of the gas flow input to the downstream sheet 117 to be substantially kept the same, and simultaneously limiting the gas flow to be uniformly input to the downstream sheet 117.

The cross-sectional area of the first premixing chamber 113 is smaller than the cross-sectional area of the gas distribution combustion chamber 114, which is beneficial for the mixture to enter the gas distribution combustion chamber 114 and prevents the mixture from flowing reversely.

As shown in fig. 1, in this case, on the premise that the diameter of the outer wall constituting the first premix chamber 113 is the same as the diameter of the outer wall constituting the gas distribution combustion chamber 114, the diameter of the inner annular surface 111 constituting the first premix chamber 113 is larger than the diameter of the inner annular surface 111 constituting the gas distribution combustion chamber 114.

Since the second burner 12 is a metal porous medium burner, the burner head 125 is a metal porous medium burner head 125, and the peripheral wall of the burner head 125 has pores (not shown) penetrating the surface thereof, and the pores are used for releasing flame outwards, and since the combustion surface 118 is located in the circumferential direction of the burner body 123, after the mixture is output along the axial direction thereof, the flame released by the peripheral wall of the burner head 125 in the circumferential direction thereof will contact with the mixture, so that the second burner head 125 can directly ignite the combustion surface 118 by using the flame.

Alternatively, the metal porous media burner head 125 is cylindrical with pores uniformly distributed around its perimeter wall and on the side away from the burner body 123.

A second premixing chamber 127 is provided in the burner body 123, and the second premixing chamber 127 is used for delivering premixed mixture to the burner head 125. Because the burner body 123 is disposed in the first burner 11 through the mounting through hole, in the actual use process, if the first burner 11 and the second burner 12 are used simultaneously, the heat generated by the first burner 11 during the combustion can preheat the air-fuel mixture in the second premixing cavity 127, thereby improving the combustion efficiency of the second burner 12.

The burner body 123 and the second pre-mixing chamber 127 may be respectively cylindrical. Optionally, a gas distribution plate (not shown) may be disposed within the second premix chamber 127.

The combustion apparatus 10 further comprises an oxidant gas supply 13.

The combustion-supporting gas supply device 13 is used for providing combustion-supporting gas, the combustion-supporting gas is oxygen-containing gas, generally air, so the combustion-supporting gas supply device 13 can be a fan, and the combustion-supporting gas supply device 13 is a variable frequency fan for the purpose of good energy-saving effect and convenient control.

The number of the combustion-supporting gas supply devices 13 may be one or two, and when the number of the combustion-supporting gas supply devices 13 is two, the two combustion-supporting gas supply devices 13 supply air independently to the corresponding first combustor 11 or second combustor 12 respectively.

In this embodiment, the number of the combustion-supporting gas supply devices 13 is one, wherein the blowing ports of the combustion-supporting gas supply devices 13 are respectively communicated with the first combustor 11 and the combustor body 123.

As shown in the figure, the combustion apparatus 10 further includes a first flow passage 14 and a second flow passage 15, the air supply outlet of the combustion-supporting air supply device 13 is communicated with the first premixing cavity 113 of the first combustor 11 through the first flow passage 14, and the air supply outlet of the combustion-supporting air supply device 13 is communicated with the second premixing cavity 127 of the second combustor 12 through the second flow passage 15.

The first flow path 14 and/or the second flow path 15 are/is provided with an air volume adjusting damper 151, for example, the air volume adjusting damper 151 is provided only in the first flow path 14 or the second flow path 15, or the air volume adjusting damper 151 is provided in both the first flow path 14 and the second flow path 15.

In the present embodiment, the adjusting damper 151 is provided only in the second flow path 15, and the amount of air supplied into the first premix chamber 113 and the second premix chamber 127 can be adjusted by the setting of the adjusting damper 151.

Since the second premixing cavity 127 is annular, in this embodiment, the second flow passage 15 is coaxially connected to the burner body 123, the first flow passage 14 is an annular flow passage, and the first flow passage 14 surrounds the second flow passage 15, so that the combustion-supporting gas is uniformly delivered into the second premixing cavity 127, which is beneficial to uniform gas mixing.

As shown, the combustion-supporting gas supply device 13 is located at one end of the first premixing chamber 113 far away from the combustion surface 118, and the combustion-supporting gas supply device 13 is located at one end of the second premixing chamber 127 far away from the combustion head 125.

The first premixing cavity 113 and the second premixing cavity 127 are respectively provided with a gas inlet 128 for inputting gas. Wherein the fuel gas can be natural gas.

The gas inlet 128 of the first premixing chamber 113 is communicated with the third flow passage 16, and the gas inlet 128 of the second premixing chamber 127 is communicated with the fourth flow passage (not shown), wherein the third flow passage 16 and the fourth flow passage are both provided with valves (not shown), and the valves are opened or closed to selectively provide gas for the first premixing chamber 113 and the second premixing chamber 127.

In order to mix more uniformly, the number of the gas inlets 128 of the first premixing chamber 113 is multiple, and the multiple gas inlets 128 located in the first premixing chamber 113 are arranged at intervals along the circumference of the first premixing chamber 113.

Combustion apparatus 10 work flow: when the combustion apparatus 10 is started, the second burner 12 is supplied with the mixed gas and ignited to start the second burner 12, the first burner 11 is supplied with the burner after the power is insufficient, the first burner 11 is ignited by using the second burner 12 to start the first burner 11, and when the load is reduced, the supply of the gas to the second burner 12 is stopped to close the second burner 12, then the supply of the gas to the first burner 11 is stopped, and the first burner 11 is closed.

To sum up, the burner that this application embodiment provided utilizes the cooperation of first combustor and second combustor, on the basis that satisfies low nitrogen and discharge, can solve the technical problem that combustor combustion efficiency is low.

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 to the present application 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 (10)

1. A combustion apparatus, comprising:

the first combustor is annularly arranged and provided with an inner ring surface surrounding a mounting through hole and a combustion surface for discharging smoke and heat; and

the second combustor is independently controlled with the first combustor, the second combustor is provided with an ignition electrode, a combustor body and a combustion head, the combustor body and the combustion head are coaxially connected, and the ignition electrode is used for igniting the combustion head;

the burner body penetrates through the mounting through hole to be arranged in the first burner, the burner head is located outside the combustion surface, and the burner head is configured to be capable of igniting the combustion surface.

2. The combustion device as claimed in claim 1, wherein said second burner is a metallic porous medium burner, and said peripheral wall of said burner head has apertures through its surface for releasing flame outwardly.

3. The combustion apparatus of claim 1 wherein said first burner is a ceramic porous medium burner.

4. The combustion device as claimed in any one of claims 1 to 3, further comprising an oxidant gas supply device, wherein the air supply outlet of the oxidant gas supply device is respectively communicated with the first burner and the burner body.

5. The combustion device as claimed in claim 4, further comprising a first flow passage and a second flow passage, wherein the supply port of the combustion-supporting gas supply device is communicated with the first burner through the first flow passage, and the supply port of the combustion-supporting gas supply device is communicated with the burner body through the second flow passage;

and the first flow channel and/or the second flow channel are/is provided with an adjusting air valve capable of adjusting air volume.

6. The combustion device as claimed in claim 5, wherein the second flow passage is coaxially connected to the burner body, the first flow passage is an annular flow passage, and the first flow passage is arranged around the second flow passage.

7. The combustion device as claimed in any one of claims 1 to 3, wherein a first premixing cavity and a gas distribution combustion cavity are sequentially arranged in the first combustor along a gas flow direction, a gas distribution assembly, an upstream piece and a downstream piece are sequentially arranged in the gas distribution combustion cavity along the gas flow direction, the combustion surface is positioned on one surface of the downstream piece far away from the upstream piece, and the installation through hole sequentially penetrates through the gas distribution assembly, the upstream piece and the downstream piece.

8. The combustion device as claimed in claim 7, wherein a second premixing cavity is arranged in the combustor body, the second premixing cavity is used for conveying premixed gas mixture to the combustion head, and gas inlets for inputting gas are respectively formed in the first premixing cavity and the second premixing cavity.

9. A combustion unit according to any one of claims 1-3, characterized in that the first burner and the second burner are arranged coaxially.

10. A combustion unit according to any one of claims 1-3, characterized in that a gap is left between the outer wall of the burner body and the inner annular surface, said gap being intended for mounting the ignition electrode.

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