CN217818286U - Heat exchange device suitable for dusty airflow - Google Patents
Heat exchange device suitable for dusty airflow Download PDFInfo
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- CN217818286U CN217818286U CN202221948984.2U CN202221948984U CN217818286U CN 217818286 U CN217818286 U CN 217818286U CN 202221948984 U CN202221948984 U CN 202221948984U CN 217818286 U CN217818286 U CN 217818286U
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Abstract
The utility model relates to the technical field of heat exchange equipment, and discloses a heat exchange device suitable for dusty airflow, which comprises at least one heat exchange unit, wherein the heat exchange unit comprises a flow guide section and a heat exchange section which are sequentially arranged along the airflow direction of the dusty airflow, and the flow guide section is a solid body; the heat exchange section comprises a first heat exchange plate and a second heat exchange plate which are oppositely arranged at intervals, a heat exchange medium channel is formed at an interval between the inner plate surface of the first heat exchange plate and the inner plate surface of the second heat exchange plate, and the heat exchange medium channel is provided with a heat exchange medium inlet and a heat exchange medium outlet; the outer side wall of the flow guide section, the outer plate surface of the first heat exchange plate and the outer plate surface of the second heat exchange plate are arranged in parallel, a plurality of heat exchange fins which are arranged at intervals are fixed on the outer side wall of the flow guide section, and each heat exchange fin is arranged in a downward inclined mode. The utility model rectifies the dusty airflow through the flow guide section, and weakens the scouring abrasion on the heat exchange surface; the heat exchange fins are arranged in a downward inclined mode, and dust is prevented from being accumulated on the heat exchange fins.
Description
Technical Field
The utility model relates to a indirect heating equipment technical field especially relates to a heat transfer device suitable for dusty air current.
Background
In an industrial process, dusty airflow needs to be heated frequently, for example, in a direct-fired pulverizing system of a coal-fired power plant, the temperature of pulverized coal airflow is usually only about 80 ℃, the temperature is low, ignition and combustion of pulverized coal are not facilitated, the stable combustion capability of a boiler is poor, and the condition can be obviously improved by increasing the temperature of the pulverized coal airflow.
The heating of the dusty gas stream is generally carried out in two ways, one is to arrange a heating device outside the dusty gas stream pipeline and indirectly heat the dusty gas stream by heating the dusty gas stream pipeline; however, this method is limited in that the heat exchange coefficient of the airflow side is low, and the heat exchange surface is only the inner surface of the pipe, so that the heat exchange area is difficult to expand, and the heating capacity of the dusty airflow is limited. One is to arrange a heating device in the pipeline of the dust-containing air flow, which can greatly increase the heat exchange area of the air flow side, thereby enhancing the heating capacity of the dust-containing air flow, but the dust-containing air flow has strong erosion property, the heat exchange surface of the heating device is quickly worn, and the service life is insufficient; meanwhile, a heating device installed inside the dusty airflow generally has a platform, a dead angle and the like, so that dust accumulation is easily caused, deflagration of dust possibly occurs to combustible dust, and potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, the utility model aims at providing a heat transfer device suitable for dusty air current to solve among the prior art and arrange heat transfer device in the pipeline inside of dusty air current, it is strong to have dusty air current erosion nature, easily leads to heat transfer device's heat transfer surface rapid wear, and simultaneously, heat transfer device usually has platform, dead angle etc. arouses the accumulational problem of dust easily.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the heat exchange device applicable to dusty airflow comprises at least one heat exchange unit, wherein the heat exchange unit is vertically arranged inside a dusty airflow pipeline;
the heat exchange unit comprises a flow guide section and a heat exchange section which are sequentially arranged along the airflow direction of the dusty airflow, wherein the flow guide section is a solid body; the heat exchange section comprises a first heat exchange plate and a second heat exchange plate which are oppositely arranged at intervals, a heat exchange medium channel for flowing a heat exchange medium is formed at an interval between the inner plate surface of the first heat exchange plate and the inner plate surface of the second heat exchange plate, and the heat exchange medium channel is provided with a heat exchange medium inlet and a heat exchange medium outlet;
the outer side wall of the flow guide section, the outer plate surface of the first heat exchange plate and the outer plate surface of the second heat exchange plate are arranged in parallel, a plurality of heat exchange fins are fixed on the outer side wall of the flow guide section, the outer plate surface of the first heat exchange plate and the outer plate surface of the second heat exchange plate at intervals from top to bottom, and each heat exchange fin is arranged in a downward inclined mode.
Preferably, the horizontal cross-sectional profile of one end of the flow guide section, which faces the airflow direction, is triangular or streamline.
Preferably, the spacing distance between adjacent heat exchange fins is gradually reduced from bottom to top.
Preferably, the heat exchange fins are inclined downwards at an angle ranging from 20 degrees to 70 degrees.
Preferably, one outer side wall of the flow guide section is arranged in a coplanar manner with the outer plate surface of the first heat exchange plate, and the other outer side wall of the flow guide section is arranged in a coplanar manner with the outer plate surface of the second heat exchange plate.
Preferably, a plurality of division bars are arranged in the heat exchange medium channel at intervals along the length direction of the heat exchange medium channel, and the division bars are alternately arranged at the upper part and the lower part of the heat exchange medium channel to form a serpentine channel in the heat exchange medium channel.
Preferably, the heat exchange medium inlet is arranged at one end of the heat exchange medium channel far away from the flow guide section, and the heat exchange medium outlet is arranged at one end of the heat exchange medium channel near the flow guide section.
Preferably, the heat exchange medium inlet is disposed at a lower portion of the heat exchange medium channel, and the heat exchange medium outlet is disposed at an upper portion of the heat exchange medium channel.
Preferably, a plurality of said heat exchange units are spaced apart inside said dust laden gas stream duct.
Preferably, the heat exchange medium is one of water, steam and oil.
The embodiment of the utility model provides a heat transfer device suitable for dusty air current compares with prior art, and its beneficial effect lies in:
the utility model discloses heat transfer device suitable for dusty air current, heat transfer unit include water conservancy diversion section and the heat transfer section of arranging in proper order along the air current direction of dusty air current, and the water conservancy diversion section is the solid, carries out the rectification to dusty air current through the water conservancy diversion section, and dusty air current enters the heat transfer surface that the flow direction is on a parallel with the heat transfer section behind the heat transfer section, obviously weakens first heat transfer board, second heat transfer board and heat transfer fin's scouring and tearing degree. The heat exchange area of the airflow side can be increased through the first heat exchange plate, the second heat exchange plate and the heat exchange fins, the heat exchange capacity is improved, and the heat exchange effect is enhanced; moreover, the heat exchange fins are arranged in a downward inclined mode, and even if dust is settled, the dust can also slide downwards along the surfaces of the heat exchange fins under the action of gravity, so that the dust is prevented from being accumulated on the heat exchange fins.
Drawings
FIG. 1 is a schematic structural diagram of a heat exchange device suitable for a dusty gas stream according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a heat exchange apparatus suitable for use with a dusty gas stream in accordance with an embodiment of the present invention;
FIG. 3 is a sectional top view of a heat exchange unit according to an embodiment of the present invention;
FIG. 4 is a side sectional view of a heat exchange unit in an embodiment of the present invention;
in the figure, 10, a dust-containing gas flow pipeline; 101. a dusty airflow path; 20. a heat exchange unit;
1. a flow guide section; 11. a first guide wall; 12. a second guide wall; 2. a heat exchange section; 21. a first heat exchange plate; 22. a second heat exchange plate; 23. a heat exchange medium channel; 231. a heat exchange medium inlet; 232. a heat exchange medium outlet; 233. a parting strip; 3. and heat exchange fins.
Detailed Description
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 invention can be understood in specific cases to those skilled in the art.
The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
As shown in fig. 1-4, the utility model discloses a heat transfer device suitable for dusty air current, including at least one heat transfer unit 20, heat transfer unit 20 is used for vertical arrangement in the inside of dusty airflow pipeline 10, and a plurality of heat transfer units 20 are arranged at the inside left and right sides interval of dusty airflow pipeline 10, and the interval between adjacent heat transfer unit 20 forms the dusty airflow channel 101 that supplies dusty gas to flow, and dusty gas carries out the heat exchange with the heat transfer unit 20 of one side or both sides at the flow in-process.
The structure of each heat exchange unit 20 is substantially the same. The heat exchange unit 20 comprises a flow guide section 1 and a heat exchange section 2 which are sequentially arranged along the airflow direction of the dusty airflow, wherein the flow guide section 1 is a solid body, and a heat exchange medium channel 23 is not arranged inside the flow guide section 1; the heat exchange section 2 comprises a first heat exchange plate 21 and a second heat exchange plate 22, the first heat exchange plate 21 and the second heat exchange plate 22 are arranged at intervals, a heat exchange medium channel 23 for flowing a heat exchange medium is formed at an interval between an inner plate surface of the first heat exchange plate 21 and an inner plate surface of the second heat exchange plate 22, the heat exchange medium channel 23 is provided with a heat exchange medium inlet 231 and a heat exchange medium outlet 232, the inner plate surface is a plate surface facing one side of the heat exchange medium channel 23, and the outer plate surface is a plate surface facing one side of the dust-containing air flow channel 101;
the outer side wall of the flow guide section 1, the outer plate surface of the first heat exchange plate 21 and the outer plate surface of the second heat exchange plate 22 are arranged in parallel, a plurality of heat exchange fins 3 which are arranged at an upper interval and a lower interval are welded and fixed on the outer side wall of the flow guide section 1, the outer plate surface of the first heat exchange plate 21 and the outer plate surface of the second heat exchange plate 22, and each heat exchange fin 3 inclines downwards.
The utility model discloses a water conservancy diversion section 1 carries out the rectification to the dusty air current, and the dusty air current gets into 2 back flow direction of heat transfer sections and is on a parallel with the heat transfer surface of heat transfer section 2, even the flow direction that gets the dusty air current is all parallel with the outer panel of first heat transfer board 21, the planking face of second heat transfer board 22 for the dusty air current obviously weakens first heat transfer board 21, second heat transfer board 22 and heat transfer fin 3's scouring and tearing degree. The heat exchange area of the airflow side can be increased through the first heat exchange plates 21, the second heat exchange plates 22 and the heat exchange fins 3, the heat exchange capacity is improved, and the heat exchange effect is enhanced; moreover, the heat exchange fins 3 are arranged in a downward inclined mode, and even if dust settlement occurs, the dust can also slide downwards along the surfaces of the heat exchange fins 3 under the action of gravity, so that the dust is prevented from being accumulated on the heat exchange fins 3.
In this embodiment, the heat exchange unit 20 is configured to heat the dust-containing gas flow, and the heat exchange medium flowing in the heat exchange medium channel 23 is a heat source medium, which may be one of water, steam, and oil.
Preferably, the spacing distance between adjacent heat exchange fins 3 is gradually reduced from bottom to top, so that the arrangement density of the heat exchange fins 3 at the lower part of the heat exchange device is smaller than that of the heat exchange fins 3 at the upper part, the circulation space of the dust-containing gas at the lower part of the dust-containing gas flow channel 101 is larger, the flow resistance is smaller, and the dust carrying capacity of the dust-containing gas flow is stronger, thereby avoiding the accumulation of the dust falling from the heat exchange fins 3 at the bottom of the dust-containing gas flow pipeline 10, and effectively improving the dust accumulation prevention performance of the heat exchange device.
Alternatively, as shown in fig. 2, the heat exchange fins 3 are inclined downward at an angle ranging from 20 ° to 70 °. The inclination angle may be any one of values of 20 ° to 70 °, for example, 30 °, 40 °, 50 °, 60 °, and the like. A plurality of heat exchange fins 3 are arranged in parallel. The heat exchange fins 3 of the flow guide section 1 and the heat exchange fins 3 of the heat exchange section 2 are respectively positioned at the same height position in a one-to-one correspondence manner, and the inclination angles of the heat exchange fins 3 of the flow guide section 1 and the heat exchange fins 3 of the heat exchange section 2 are equal.
In this embodiment, the heat exchange fins 3 extend along the longitudinal direction of the heat exchange unit 20.
Preferably, the horizontal cross-sectional profile of one end of the flow guide section 1, which faces the airflow direction, is triangular or streamlined to reduce the local resistance to the dusty airflow, wherein the horizontal cross-section is parallel to the thickness direction of the flow guide section 1. As shown in fig. 3, the first guide wall 11 and the second guide wall 12 of the guide section 1 both extend in the opposite direction to the airflow direction, the extending section of the first guide wall 11 inclines in the direction close to the second guide wall 12, the extending section of the second guide wall 12 inclines in the direction close to the first guide wall 11, and the extending section of the first guide wall 11 and the extending section of the second guide wall 12 are arranged at an included angle, so that a triangular protrusion is formed at one end of the guide section 1 facing the airflow direction.
In this embodiment, one of the outer side walls (i.e., the first flow guide wall 11) of the flow guide section 1 is coplanar with the outer plate surface of the first heat exchange plate 21, and the other outer side wall (i.e., the second flow guide wall 12) of the flow guide section 1 is coplanar with the outer plate surface of the second heat exchange plate 22, so that the heat exchange fins 3 can be conveniently arranged, and the erosion wear of the dusty air flow to the outer plate surfaces of the first heat exchange plate 21 and the second heat exchange plate 22 can be reduced.
In the embodiment, the flow guide section 1 is made of wear-resistant materials, and has good wear resistance.
In this embodiment, a plurality of division bars 233 are arranged in the heat exchange medium channel 23 at intervals along the length direction of the heat exchange medium channel 23, and the division bars 233 are alternately arranged at the upper part and the lower part of the heat exchange medium channel 23 to form a serpentine channel in the heat exchange medium channel 23, so that the heat exchange medium flows in the serpentine channel in the heat exchange medium channel 23, the flow time of the heat exchange medium can be prolonged, and the heat exchange effect can be enhanced. The division bar 233 may have a plate shape.
Optionally, the heat exchange medium inlet 231 is disposed at one end of the heat exchange medium channel 23 far away from the flow guide section 1, and the heat exchange medium outlet 232 is disposed at one end of the heat exchange medium channel 23 close to the flow guide section 1, so that a flowing direction of the heat exchange medium is opposite to a flowing direction of the dusty gas flow, and a heat exchange effect is improved. Further, as shown in fig. 4, the heat exchange medium inlet 231 is disposed at a lower portion of the heat exchange medium channel 23, and the heat exchange medium outlet 232 is disposed at an upper portion of the heat exchange medium channel 23.
It should be noted that, as shown in fig. 2 and fig. 4, the upper portion of the heat exchange device extends upward to the inner wall of the upper portion of the dust-containing gas flow duct 10, the lower portion of the heat exchange device extends downward to the inner wall of the lower portion of the dust-containing gas flow duct 10, and the heat exchange medium channel 23 is formed by the inner plate surfaces of the first heat exchange plates 21, the second heat exchange plates 22, and the inner wall of the dust-containing gas flow duct 10. The heat exchange medium inlet 231 and the heat exchange medium outlet 232 may be formed on the wall of the dusty gas flow duct 10. In the length direction of the heat exchange medium channel 23, the front end of the heat exchange medium channel 23 is sealed by the flow guide section 1, and the rear end of the heat exchange medium channel 23 can be provided with a rear end plate, wherein the front end is the end close to the flow guide section 1, and the rear end is the end far away from the flow guide section 1.
Take to heat dusty air current as the example, explain the utility model discloses a working process is:
when the heat exchanger is in operation, a heat source medium enters the heat exchange medium channel 23 from the heat exchange medium inlet 231 of the heat exchange section 2, and flows in a serpentine manner in the heat exchange medium channel 23 under the constraint of the spacing bars 233, and heats the dust-containing gas flow through the first heat exchange plates 21, the second heat exchange plates 22 and the heat exchange fins 3, and finally flows out from the heat exchange medium outlet 232; the dusty airflow enters the interior of the dusty airflow pipeline 10, is rectified by the flow guide section 1, and then enters the heat exchange section 2, and the airflow direction is parallel to the heat exchange surfaces of the first heat exchange plate 21, the second heat exchange plate 22, the heat exchange fins 3 and the like, so that the scouring abrasion to the heat exchange surfaces is obviously reduced; through adjustment heat transfer fin 3 arrangement, make heat transfer fin 3 density of heat transfer device lower part less, the air current circulation resistance is less, and the dust carrying capacity is stronger, can prevent that the dust that causes from sliding down from heat transfer fin 3 from piling up.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (10)
1. A heat exchange device suitable for dusty gas flow is characterized by comprising at least one heat exchange unit, wherein the heat exchange unit is used for being vertically arranged inside a dusty gas flow pipeline;
the heat exchange unit comprises a flow guide section and a heat exchange section which are sequentially arranged along the airflow direction of the dusty airflow, wherein the flow guide section is a solid body; the heat exchange section comprises a first heat exchange plate and a second heat exchange plate which are oppositely arranged at intervals, a heat exchange medium channel for flowing a heat exchange medium is formed at an interval between the inner plate surface of the first heat exchange plate and the inner plate surface of the second heat exchange plate, and the heat exchange medium channel is provided with a heat exchange medium inlet and a heat exchange medium outlet;
the outer side wall of the flow guide section, the outer plate surface of the first heat exchange plate and the outer plate surface of the second heat exchange plate are arranged in parallel, a plurality of heat exchange fins are fixed on the outer side wall of the flow guide section, the outer plate surface of the first heat exchange plate and the outer plate surface of the second heat exchange plate at intervals from top to bottom, and each heat exchange fin is arranged in a downward inclined mode.
2. The heat exchange device for dusty gas stream of claim 1, wherein the horizontal cross sectional profile of the end of the flow guide section facing the gas stream direction is triangular or streamlined.
3. The heat exchange device for a dusty gas stream of claim 1, wherein the spacing distance between adjacent heat exchange fins decreases from bottom to top.
4. A heat exchange unit adapted for use with a dusty gas stream as claimed in claim 1 wherein the heat exchange fins are inclined downwardly at an angle in the range 20 ° to 70 °.
5. The heat exchange device for a dusty gas stream of claim 1, wherein one of the outer side walls of the flow guide section is disposed coplanar with the outer plate surface of the first heat exchange plate and the other outer side wall of the flow guide section is disposed coplanar with the outer plate surface of the second heat exchange plate.
6. The heat exchange device for a dusty gas stream according to claim 1, wherein a plurality of division bars are arranged at intervals along the length direction of the heat exchange medium channel in the heat exchange medium channel, and the division bars are alternately arranged at the upper part and the lower part of the heat exchange medium channel to form a serpentine channel in the heat exchange medium channel.
7. The heat exchange device for a dusty gas stream of claim 1, wherein the heat exchange medium inlet is disposed at an end of the heat exchange medium channel distal from the flow guide section, and the heat exchange medium outlet is disposed at an end of the heat exchange medium channel proximal to the flow guide section.
8. The heat exchange device suitable for a dusty gas stream of claim 7, wherein the heat exchange medium inlet is disposed at a lower portion of the heat exchange medium channel and the heat exchange medium outlet is disposed at an upper portion of the heat exchange medium channel.
9. The heat exchange device for a dusty gas stream of claim 1, wherein a plurality of the heat exchange units are spaced apart inside the dusty gas stream duct.
10. The heat exchange device suitable for a dusty gas stream of claim 1, wherein the heat exchange medium is one of water, steam, and oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221948984.2U CN217818286U (en) | 2022-07-22 | 2022-07-22 | Heat exchange device suitable for dusty airflow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221948984.2U CN217818286U (en) | 2022-07-22 | 2022-07-22 | Heat exchange device suitable for dusty airflow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217818286U true CN217818286U (en) | 2022-11-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221948984.2U Active CN217818286U (en) | 2022-07-22 | 2022-07-22 | Heat exchange device suitable for dusty airflow |
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| Country | Link |
|---|---|
| CN (1) | CN217818286U (en) |
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2022
- 2022-07-22 CN CN202221948984.2U patent/CN217818286U/en active Active
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