CN219328115U - Tubular air preheater - Google Patents
Tubular air preheater Download PDFInfo
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- CN219328115U CN219328115U CN202320713587.5U CN202320713587U CN219328115U CN 219328115 U CN219328115 U CN 219328115U CN 202320713587 U CN202320713587 U CN 202320713587U CN 219328115 U CN219328115 U CN 219328115U
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- heat exchange
- exchange tube
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- flue gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The application belongs to the technical field of air preheaters, and particularly relates to a tubular air preheater. The tubular air preheater comprises a shell and a heat exchange tube bundle, wherein a flue gas channel is arranged in the shell, the heat exchange tube bundle is arranged in the flue gas channel, the heat exchange tube bundle comprises a plurality of rows of heat exchange tube rows, each row of heat exchange tube rows comprises a plurality of heat exchange tubes arranged at intervals, a first outer lining coating is arranged on the outer peripheral surface of at least one heat exchange tube, the smoothness of the first outer lining coating is higher than that of the outer peripheral surface of the heat exchange tube, and a heat conducting piece is arranged on the outer peripheral surface of at least one heat exchange tube provided with the first outer lining coating. The application can not only prevent that the dust from sticking on heat exchange pipeline, and can solve the problem that first outer lining coating reduces heat exchange pipeline's heat exchange efficiency.
Description
Technical Field
The application belongs to the technical field of air preheaters, and particularly relates to a tubular air preheater.
Background
The tubular air preheater is important auxiliary equipment of the thermal power generating unit, and can utilize the heat of the flue gas to heat the air entering the boiler, and in the process, the air can absorb the heat in the flue gas, so that the flue gas temperature of the boiler is reduced, and the heat loss of flue gas is reduced; at the same time, the air entering the boiler is heated in advance, so that the combustion efficiency and combustion stability of the boiler can be improved.
The tubular air preheater comprises a shell and a heat exchange tube bundle, wherein the heat exchange tube bundle is used for conveying air, a flue gas channel between the heat exchange tube bundle and the shell is used for conveying flue gas, and because the smoothness of the outer peripheral surface of the heat exchange tube bundle is lower, stains and dust in the flue gas are easy to adhere to the outer peripheral surface of the heat exchange tube bundle. In order to solve the problem, the related art lays a coating with higher smoothness on the outer peripheral surface of the heat exchange tube bundle, thereby improving the smoothness of the heat exchange tube bundle and preventing stains and dust from adhering to the heat exchange tube bundle, but the coating coats the outer peripheral surface of the heat exchange tube bundle, so that the heat exchange efficiency of the heat exchange tube bundle is reduced, the heating effect on air is reduced, and the combustion efficiency and the combustion stability of a boiler are further reduced.
Disclosure of Invention
The embodiment of the application aims to provide a tubular air preheater which can improve the heat exchange efficiency of a heat exchange tube bundle.
In order to solve the technical problems, the application is realized as follows:
the embodiment of the application provides a tubular air preheater, including casing and heat exchange tube bank, be equipped with flue gas passageway in the casing, in flue gas passageway was located to the heat exchange tube bank, heat exchange tube bank included the multirow heat exchange tube bank, and every heat exchange tube bank includes the heat exchange tube that a plurality of intervals set up, and the outer peripheral face of at least one heat exchange tube is equipped with first outer lining coating, and the smooth finish of first outer lining coating is higher than the smooth finish of heat exchange tube's outer peripheral face, is equipped with the heat conduction piece on the outer peripheral face of at least one heat exchange tube who is equipped with first outer lining coating.
In this embodiment, heat exchange tube bank includes multirow heat exchange tube bank, and every heat exchange tube bank includes the heat exchange tube who a plurality of intervals set up, and the outer peripheral face of at least one heat exchange tube is equipped with first outer lining coating, and the smooth finish of first outer lining coating is higher than the smooth finish of heat exchange tube's outer peripheral face, so can prevent spot, the dust adhesion in the flue gas on heat exchange tube's outer peripheral face. In addition, be equipped with the heat conduction piece on the outer peripheral face of at least one heat exchange pipeline that is equipped with first outer lining coating to can increase the heat transfer area of this heat exchange pipeline, and then increase the heat exchange efficiency of heat exchange pipeline, improve the heating effect to the air, and then improve the combustion efficiency and the combustion stability of boiler. Therefore, the dust can be prevented from adhering to the heat exchange pipeline, and the problem that the heat exchange efficiency of the heat exchange pipeline is reduced by the first outer lining coating can be solved.
Drawings
FIG. 1 is a schematic view of a portion of the interior of a tubular air preheater disclosed in an embodiment of the present application;
FIG. 2 is an enlarged schematic view of FIG. 1A of the present application;
FIG. 3 is a schematic cross-sectional view of a tubular air preheater disclosed in an embodiment of the present application.
Reference numerals illustrate:
100-shell, 110-flue gas channel, 111-sub-channel, 120-flue gas inlet, 130-flue gas outlet, 140-first inner wall, 150-second inner wall, 200-heat exchange pipeline, 300-heat conducting piece, 310-central plane, 320-first heat conducting plane, 330-second heat conducting plane, 400-first ash guiding piece, 410-first guiding plane, 500-second ash guiding piece, 510-second guiding plane, 600-tube plate.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings of the embodiments of the present application, and it is apparent that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
The tubular air preheater provided in the embodiment of the application is described in detail below by means of specific embodiments and application scenarios thereof with reference to the accompanying drawings.
As shown in fig. 1-3, embodiments of the present application disclose a tubular air preheater comprising a housing 100 and a heat exchange tube bundle. Specifically, the housing 100 is a base member of a tubular air preheater that may provide a mounting base for a heat exchange tube bundle, such as: tube sheet 600 may be disposed within shell 100 with a portion of heat exchange tubes 200 in the heat exchange tube bundle positioned within through-holes of tube sheet 600 for securing heat exchange tubes 200 within flue gas channel 110.
The housing 100 is provided with a flue gas channel 110, and the heat exchange tube bundle is arranged in the flue gas channel 110 and comprises a plurality of rows of heat exchange tube rows, wherein each row of heat exchange tube rows comprises a plurality of heat exchange tubes 200 arranged at intervals. Specifically, the flue gas channel 110 is used for conveying flue gas, the heat exchange pipeline 200 is used for conveying air, and heat exchange can be performed between the flue gas and the air, so that the temperature of the flue gas is reduced, and the temperature of the air is increased; the heat exchange tube 200 may be a round tube, a square tube, etc.
The outer circumferential surface of at least one heat exchange tube 200 is provided with a first outer lining layer, the smoothness of which is higher than that of the outer circumferential surface of the heat exchange tube 200, and the outer circumferential surface of at least one heat exchange tube 200 provided with the first outer lining layer is provided with a heat conductive member 300. In this embodiment, the heat exchange tube bank includes the multirow heat exchange tube bank, and every heat exchange tube bank includes the heat exchange tube 200 that a plurality of intervals set up, and the outer peripheral face of at least one heat exchange tube 200 is equipped with first outer lining coating, and the smoothness of first outer lining coating is higher than the smoothness of the outer peripheral face of heat exchange tube 200, so can prevent spot, the dust adhesion in the flue gas on the outer peripheral face of heat exchange tube 200. In addition, the heat conducting piece 300 is arranged on the outer peripheral surface of at least one heat exchange pipeline 200 provided with the first outer lining coating, so that the heat exchange area of the heat exchange pipeline 200 can be increased, the heat exchange efficiency of the heat exchange pipeline 200 can be further increased, the heating effect on air can be improved, and the combustion efficiency and the combustion stability of the boiler can be further improved. Therefore, the dust can be prevented from adhering to the heat exchange pipeline 200, and the problem that the heat exchange efficiency of the heat exchange pipeline 200 is reduced by the first outer lining coating can be solved. In addition, dirt and dust may accumulate on the heat exchange tube 200, which may corrode the heat exchange tube 200, and thus the present application may also prevent the heat exchange tube 200 from being corroded by the dirt and dust.
The housing 100 has a flue gas inlet 120 and a flue gas outlet 130 disposed opposite each other, the flue gas inlet 120 and the flue gas outlet 130 being in communication with the flue gas channel 110, respectively. Specifically, the flue gas may flow from the flue gas inlet 120 to the flue gas outlet 130, and the flow direction of the flue gas is parallel to the direction extending from the flue gas inlet 120 to the flue gas outlet 130.
Alternatively, the extending direction of the heat conducting member 300 may intersect with the first direction, and at this time, the extending direction of the heat conducting member 300 intersects with the flowing direction of the flue gas, so that the heat conducting member 300 blocks the flow of the flue gas, and the heat exchange efficiency of the tubular air preheater is reduced. In an alternative embodiment, the heat conducting member 300 extends in a first direction, wherein the first direction is parallel to the direction extending from the flue gas inlet 120 to the flue gas outlet 130. In this embodiment, the heat conducting member 300 extends along the first direction, that is, the extending direction of the heat conducting member 300 is parallel to the flowing direction of the flue gas, so that the influence of the heat conducting member 300 on the flue gas flow can be reduced or even avoided.
In addition, the heat conducting member 300 may be a heat conducting layer, and the heat conducting layer wraps at least a portion of the outer peripheral surface of the heat exchange tube 200, and the heat conducting layer wraps the heat exchange tube 200, so that the surface area of the heat conducting layer is larger than that of the heat exchange tube 200, that is, the heat exchange area of the heat exchange tube 200 can be increased by arranging the heat conducting layer, so that the heat exchange efficiency of the heat exchange tube 200 is increased, and the heating effect on air is improved.
In an alternative embodiment, the heat exchange tube rows are spaced apart along the first direction, and in the first direction, both ends of the heat conductive member 300 are connected to the adjacent two heat exchange tubes 200, respectively, that is, the first connection end of the heat conductive member 300 is connected to the heat exchange tube 200 adjacent thereto, and the second connection end of the heat conductive member 300 is connected to the heat exchange tube 200 adjacent thereto. In this embodiment, two ends of the heat conducting member 300 are respectively connected to two adjacent heat exchange tubes 200, so that the length of the heat conducting member 300 extending along the first direction is longer, thereby increasing the heat exchange area of the heat conducting member 300 and further increasing the heat exchange efficiency of the heat exchange tubes 200. In addition, the two ends of the heat conductive member 300 are respectively connected with the two adjacent heat exchange tubes 200, so that the connection strength between the two adjacent heat exchange tubes 200 can be increased, and the structural strength of the heat exchange tube bundle can be further increased.
Alternatively, the heat conducting member 300 may have a columnar structure, and the heat exchanging area of the heat conducting member 300 is smaller, and the heat exchanging efficiency of the heat exchanging pipe 200 is also smaller. In an alternative embodiment, the heat conductive member 300 has a plate-like structure, and the length direction of the heat conductive member 300 is parallel to the axial direction of the heat exchange tube 200. In this embodiment, the heat conducting member 300 has a plate-shaped structure, and the length direction of the heat conducting member 300 is parallel to the axial direction of the heat exchange tube 200, so that the heat exchange area of the plate-shaped structure is larger than that of the columnar structure, and the heat exchange efficiency of the heat exchange tube 200 can be further increased. In addition, compared with the columnar structure, the connection area between the heat conducting member 300 and the heat exchange pipes 200 is larger, so that the connection strength between two adjacent heat exchange pipes 200 can be increased, and the structural strength of the heat exchange pipe bundle can be further increased.
The tubular air preheater further includes a first ash guide 400, and the heat conductive member 300 has a first connection end and a second connection end in sequence in a direction in which the flue gas inlet 120 extends toward the flue gas outlet 130, the first connection end and the second connection end being respectively connected to the adjacent heat exchange pipe 200. In the above embodiment, taking the orientation shown in fig. 2 as an example, dust in the flue gas may be accumulated on the left and right sides of the second connection end during the flowing process of the flue gas.
To reduce the risk of dust accumulating on the left and right sides of the second connection end, in an alternative embodiment, at least one of the two sides of the heat conductive member 300 in the direction in which the heat exchange tube row extends is provided with a first ash guide 400, the first ash guide 400 being connected to the second connection end and the heat exchange tube 200 connected to the second connection end, respectively, the first ash guide 400 having a first guide surface 410, the height of the first guide surface 410 gradually decreasing in the direction in which the heat conductive member 300 extends toward the first ash guide 400; in this embodiment, the first guiding surface 410 is used for guiding dust in the flue gas into the flue gas channel 110, and as an example, the first guiding surface 410 is used for guiding dust into the flue gas channel 110, so that the risk of dust accumulation on at least one of the left and right sides of the second connection end is reduced. Note that, the height of the first guiding surface 410 refers to a vertical distance between the first guiding surface 410 and the ground plane. Alternatively, the first ash guide 400 may be a separate member, or may be a weld that connects the second connection end to the heat exchange pipe 200; the first guiding surface 410 may be an inclined surface or an arc surface.
Further, the tubular air preheater further includes a second ash guide 500, at least one of two sides of the heat conductive member 300 in the direction in which the heat exchange tube row extends is provided with the second ash guide 500, the second ash guide 500 is connected to the first connection end and the heat exchange tube 200 connected to the first connection end, respectively, the second ash guide 500 has a second guide surface 510, and the height of the second guide surface 510 is gradually increased in the direction in which the heat conductive member 300 extends toward the second ash guide 500. In this embodiment, taking the orientation shown in fig. 2 as an example, at least one of the left and right sides of the first connection end is provided with the second ash guiding member 500, when the dust in the flue gas passes through the second guiding surface 510 of the second ash guiding member 500, the second guiding surface 510 can guide the dust from the first connection end to the second connection end, so that the risk that the dust adheres to at least one of the left and right sides of the first connection end can be reduced, and the dust can be guided into the flue gas channel 110 by the first ash guiding member 400 at the second connection end. Alternatively, the second ash guide member 500 may be a separate member, or may be a weld that connects the first connection end to the heat exchange pipe 200; the second guiding surface 510 may be an inclined surface or an arc surface.
Taking the orientation shown in fig. 2 as an example, when the heat exchange pipeline 200 is a circular pipe, the inclination of the tangent line of the top of the heat exchange pipeline 200 compared with the horizontal plane is minimum, that is, the inclination of the top of the pipe is minimum, so that dust in flue gas is not easy to enter the flue gas channel 110 when falling on the top of the pipe, but is easy to accumulate on the top of the heat exchange pipeline 200, and the top of the heat exchange pipeline 200 refers to the highest position of the heat exchange pipeline 200.
In an alternative embodiment, the heat conducting member 300 has a central surface 310, the heat conducting member 300 has a first heat conducting surface 320 and a second heat conducting surface 330 in the direction in which the heat exchanging tube row extends, the first heat conducting surface 320 and the second heat conducting surface 330 are symmetrical with respect to the central surface 310, and the axis of the heat exchanging tube 200 connected to the heat conducting member 300 is located in the plane of the central surface 310, that is, in the orientation shown in fig. 2, the top of the heat exchanging tube 200 is located in the plane of the central surface 310 of the heat exchanging member 300, and the first heat conducting surface 320 and the second heat conducting surface 330 are located at the left and right sides of the top of the heat exchanging tube 200, respectively, so that dust cannot fall on the top of the tube with the smallest gradient, but can fall on the position of the heat exchanging tube 200 with the larger gradient than the top of the tube, and at this time, under the action of the gradient, the dust is easily guided into the flue gas channel 110, so that the risk of dust accumulating on the heat exchanging tube 200 can be reduced.
In an alternative embodiment, the rows of heat exchange tubes are spaced apart along a first direction in which the housing 100 has a first inner wall 140 and a second inner wall 150. Alternatively, the first inner wall 140 may be an inner top wall or an inner bottom wall of the housing 100, and the second inner wall 150 may be an inner bottom wall or an inner top wall of the housing 100.
The number of the heat conducting pieces 300 is plural, the length direction of each heat conducting piece 300 is parallel to the axial direction of the heat exchange pipeline 200, in the first direction, the heat conducting pieces 300 are arranged between two adjacent heat exchange pipelines 200, between the first inner wall 140 and the heat exchange pipeline 200 adjacent to the heat conducting pieces, and between the second inner wall 150 and the heat exchange pipeline 200 adjacent to the heat conducting pieces, the heat conducting pieces 300, the heat exchange pipeline 200, the first inner wall 140 and the second inner wall 150 divide the flue gas channel 110 into a plurality of sub-channels 111, that is, the sub-channels 111 are not communicated with each other, and the sub-channels 111 are distributed at intervals along the extending direction of the heat exchange pipeline row. In this embodiment, in the first direction, the heat conducting members 300 are disposed between each heat exchange tube 200 in the heat exchange tube row close to the first inner wall 140 and the first inner wall 140, the heat conducting members 300 are disposed between each heat exchange tube 200 in the adjacent two heat exchange tube rows, and the heat conducting members 300 are disposed between each heat exchange tube 200 in the heat exchange tube row close to the second inner wall 150 and the second inner wall 150, so that the flue gas channel 110 can be divided into a plurality of sub-channels 111 distributed at intervals along the extending direction of the heat exchange tube row, the flue gas can be split into each sub-channel 111 after entering from the flue gas inlet 120, and because each sub-channel 111 is not communicated, the flue gas in each sub-channel 111 can not flow from one sub-channel 111 with higher pressure to the other sub-channel 111 with lower pressure, thereby avoiding dust from striking the heat conducting members 300 in the process of flowing from one sub-channel 111 to the other sub-channel 111, and avoiding dust from being blocked by the heat conducting members 300 and accumulating on the heat exchange tube 200.
In an alternative embodiment, the outer surface of the heat conducting member 300 is provided with a second overcoat layer, and the smoothness of the second overcoat layer is higher than that of the outer surface of the heat conducting member 300, so that dirt and dust in the smoke is prevented from adhering to the outer surface of the heat conducting member 300. Alternatively, the second overcoat layer may entirely cover the outer surface of the heat conductive member 300, or may cover a portion of the outer surface of the heat conductive member 300; the second outer lining coating of this embodiment may be an enamel layer or a ceramic layer, and the enamel layer and the ceramic layer have a higher finish, and the enamel layer and the ceramic layer have better corrosion resistance and high temperature resistance, so that the heat conductive member 300 can be prevented from being corroded.
In an alternative embodiment, the first outer lining coating is an enamel layer or a ceramic layer. In this embodiment, the enamel layer and the ceramic layer have higher smoothness, and the enamel layer and the ceramic layer have better corrosion resistance and high temperature resistance, so that the heat exchange pipeline 200 can be prevented from being corroded.
Alternatively, the first outer coating layer may completely cover the outer circumferential surface of the heat exchange tube 200, and the heat conductive member 300 may be disposed on the outer circumferential surface of the first outer coating layer, which may result in a smaller increased heat exchange efficiency of the heat exchange tube 200, because the first outer coating layer may hinder heat transfer between the heat conductive member 300 and the heat exchange tube 200. In an alternative embodiment, the outer peripheral surface of the heat exchange tube 200 has a coated region and a non-coated region, the first outer liner coating being disposed on and covering the coated region, and the heat conductive member 300 being disposed on and covering the non-coated region. In this embodiment, the heat conducting member 300 is disposed in and covers the non-coating area, and the heat conducting member 300 is directly connected to the heat exchange tube 200 at this time, that is, no first outer coating is disposed between the heat conducting member 300 and the heat exchange tube 200, so that the heat transfer efficiency between the heat conducting member 300 and the heat exchange tube 200 is high, and further the heat exchange efficiency of the heat exchange tube 200 is further improved.
In the embodiments described above, the differences between the embodiments are mainly described, and as long as there is no contradiction between the different optimization features between the embodiments, the different optimization features may be combined to form a better embodiment, and in consideration of brevity of line text, the description is omitted here. The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.
Claims (10)
1. A tubular air preheater is characterized by comprising a shell (100) and a heat exchange tube bundle,
a flue gas channel (110) is arranged in the shell (100), the heat exchange tube bundle is arranged in the flue gas channel (110), the heat exchange tube bundle comprises a plurality of rows of heat exchange tube rows, each row of heat exchange tube rows comprises a plurality of heat exchange tubes (200) arranged at intervals, the outer peripheral surface of at least one heat exchange tube (200) is provided with a first outer lining coating, the smoothness of the first outer lining coating is higher than that of the outer peripheral surface of the heat exchange tube (200),
at least one of the heat exchange tubes (200) provided with the first outer lining layer is provided with a heat conducting member (300) on the outer peripheral surface thereof.
2. The tubular air preheater according to claim 1, wherein said housing (100) has oppositely disposed flue gas inlet (120) and flue gas outlet (130), said flue gas inlet (120) and said flue gas outlet (130) being in communication with said flue gas channel (110), respectively, said heat conducting member (300) extending in a first direction,
wherein the first direction is parallel to a direction extending from the flue gas inlet (120) to the flue gas outlet (130).
3. A tubular air preheater according to claim 2, wherein each of said heat exchange tube rows is spaced apart along said first direction, and wherein said heat conducting members (300) are connected at both ends thereof to adjacent ones of said heat exchange tubes (200), respectively, in said first direction.
4. A tubular air preheater according to claim 3, wherein said heat conducting member (300) has a plate-like structure, and a longitudinal direction of said heat conducting member (300) is parallel to an axial direction of said heat exchanging tube (200).
5. A tubular air preheater according to claim 3, further comprising a first ash guide member (400), said heat guide member (300) having a first connection end and a second connection end in sequence in a direction in which said flue gas inlet (120) extends toward said flue gas outlet (130), said first connection end and said second connection end being respectively connected to adjacent said heat exchange tubes (200),
at least one of the two sides of the heat conducting piece (300) along the extending direction of the heat exchange tube row is provided with a first ash guiding piece (400), the first ash guiding piece (400) is respectively connected with the second connecting end and the heat exchange tube (200) connected with the second connecting end, the first ash guiding piece (400) is provided with a first guiding surface (410), and the height of the first guiding surface (410) is gradually reduced in the extending direction of the heat conducting piece (300) to the first ash guiding piece (400).
6. A tubular air preheater according to claim 3, wherein said heat conducting member (300) has a central plane (310), said heat conducting member (300) having a first heat conducting plane (320) and a second heat conducting plane (330) in the direction in which said heat exchange tube rows extend, said first heat conducting plane (320) and said second heat conducting plane (330) being symmetrical about said central plane (310),
the axis of the heat exchange tube (200) connected to the heat conducting member (300) is located in a plane in which the center plane (310) is located.
7. The tubular air preheater according to claim 2, wherein each of said heat exchange tube rows is spaced apart along said first direction, said housing (100) has a first inner wall (140) and a second inner wall (150) in said first direction, said heat conducting members (300) are plural in number, and a length direction of each of said heat conducting members (300) is parallel to an axial direction of said heat exchange tube (200),
in the first direction, the heat conducting pieces (300) are arranged between two adjacent heat exchange pipelines (200), between the first inner wall (140) and the heat exchange pipeline (200) adjacent to the first inner wall, and between the second inner wall (150) and the heat exchange pipeline (200) adjacent to the second inner wall,
the heat conducting piece (300), the heat exchange pipeline (200), the first inner wall (140) and the second inner wall (150) divide the flue gas channel (110) into a plurality of sub-channels (111), and the sub-channels (111) are distributed at intervals along the extending direction of the heat exchange pipeline row.
8. A tubular air preheater according to claim 1, wherein the outer surface of the heat conducting member (300) is provided with a second outer lining coating, the second outer lining coating having a finish higher than the finish of the outer surface of the heat conducting member (300).
9. A tubular air preheater according to claim 1, wherein said first outer liner coating is an enamel layer or a ceramic layer.
10. A tubular air preheater according to claim 1, wherein said heat exchange tube (200) has a coated region and a non-coated region on its outer periphery, said first outer liner coating being disposed over and covering said coated region, said heat conducting member (300) being disposed over and covering said non-coated region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320713587.5U CN219328115U (en) | 2023-04-03 | 2023-04-03 | Tubular air preheater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320713587.5U CN219328115U (en) | 2023-04-03 | 2023-04-03 | Tubular air preheater |
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| CN219328115U true CN219328115U (en) | 2023-07-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117797625A (en) * | 2024-02-29 | 2024-04-02 | 山西蓝天美誉环保科技有限公司 | Flue gas desulfurization and denitrification system |
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2023
- 2023-04-03 CN CN202320713587.5U patent/CN219328115U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117797625A (en) * | 2024-02-29 | 2024-04-02 | 山西蓝天美誉环保科技有限公司 | Flue gas desulfurization and denitrification system |
| CN117797625B (en) * | 2024-02-29 | 2024-05-07 | 山西蓝天美誉环保科技有限公司 | Flue gas desulfurization and denitrification system |
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