CN210464181U - Dew point corrosion prevention structure for tubular heat exchanger - Google Patents
Dew point corrosion prevention structure for tubular heat exchanger Download PDFInfo
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- CN210464181U CN210464181U CN201921230974.3U CN201921230974U CN210464181U CN 210464181 U CN210464181 U CN 210464181U CN 201921230974 U CN201921230974 U CN 201921230974U CN 210464181 U CN210464181 U CN 210464181U
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- dew point
- heat exchanger
- corrosion prevention
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Abstract
The utility model discloses a prevent corrosion of dew point structure for tubular heat exchanger. The dew point corrosion prevention structure comprises: the tube plate is used for fixing a heat exchange tube of the tube type heat exchanger and is provided with a first surface and a second surface; a sealing plate having a third surface and a fourth surface, the third surface of the sealing plate being opposite the second surface of the tube sheet; the heat insulation layer is arranged between the second surface of the tube plate and the third surface of the sealing plate and is respectively contacted with the second surface of the tube plate and the third surface of the sealing plate; and an attachment plate connecting the tube sheet to the closure plate such that the tube sheet, closure plate and attachment plate surround the insulation layer. According to the utility model discloses a prevent that dew point corrodes structure for tubular heat exchanger has advantages such as simple structure, corrosion-resistant, can solve because of dew point corrodes and makes the equipment performance reduce damage scheduling problem even.
Description
Technical Field
The utility model relates to a prevent corrosion by dew point structure for tubular heat exchanger, concretely relates to prevent corrosion by dew point structure for air heater.
Background
Coal, called coal for short, is ancient plant remains, is buried under the stratum, and acts under the pressure and temperature condition of air isolated by the crust, so that carbonized fossil minerals are produced, and are mainly exploited by human beings to be used as fuels. Coal is used for modern industries, namely heavy industry and light industry; the coal plays an important role in energy industry, metallurgical industry, chemical industry, mechanical industry, light textile industry, food industry and transportation industry, and various industrial departments consume a certain amount of coal to a certain extent, so the coal is called as real grain of the industry. Is one of the main energy sources used in the human world since the eighteenth century. Coal usually contains sulfur elements, and sulfur in the coal is mainly derived from proteins in original plants of coal, so that organic sulfur is mainly used, pyrite is inferior to pyrite, and sulfate sulfur is the lowest. Sulfur in coal produces a large amount of sulfur oxides during combustion, which not only pollutes the atmosphere, but also corrodes boiler equipment.
In the production of chemical industry and petroleum industry, the flue gas waste heat recovery can adopt a tubular air preheater. But SO contained in the flue gas3And the like, which can generate acid steam with water vapor, and the dew point of the flue gas is obviously increased due to the presence of the acid steam. When flue gas containing acid steam passes through the outlet section, the wall temperature is often lower than the flue gas dew point due to temperature drop, which causes the acid steam to condense on the outlet wall surface, so that the cold fluid inlet side end tube plate and the end tube plate and steel tube welding seam have the risk of dew point corrosion. Over time, the corrosion to equipment can be caused, the service life of the equipment is influenced, and the production safety is damaged.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above-mentioned shortcoming of heat exchanger among the air heater, the utility model provides a prevent corrosion by dew point structure for tubular heat exchanger.
According to an aspect of the utility model, a prevent dew point corrosion structure for tubular heat exchanger is provided, prevent dew point corrosion structure includes: the tube plate is used for fixing a heat exchange tube of the tube type heat exchanger and is provided with a first surface and a second surface; a sealing plate having a third surface and a fourth surface, the third surface of the sealing plate being opposite the second surface of the tube sheet; the heat insulation layer is arranged between the second surface of the tube plate and the third surface of the sealing plate and is respectively contacted with the second surface of the tube plate and the third surface of the sealing plate; and an attachment plate connecting the tube sheet to the closure plate such that the tube sheet, closure plate and attachment plate surround the insulation layer.
According to an exemplary embodiment of the present invention, the dew point corrosion prevention structure may further include an external structure having an outer frame, wherein the connection plate is fixed to the outer frame.
According to an exemplary embodiment of the invention, the thermal insulation layer may be a ceramic fibre wool layer.
According to the utility model discloses a prevent that dew point corrodes structure for tubular heat exchanger has advantages such as simple structure, corrosion-resistant, can solve because of dew point corrodes and makes the equipment performance reduce damage scheduling problem even.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a schematic diagram illustrating a dew point corrosion prevention structure for a tube heat exchanger according to an embodiment of the present invention.
Detailed Description
A dew point corrosion preventing structure for a tube heat exchanger according to an exemplary embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram illustrating a dew point corrosion prevention structure for a tube heat exchanger according to an embodiment of the present invention.
Referring to fig. 1, the dew point corrosion prevention structure for a tube heat exchanger according to an embodiment of the present invention includes a tube plate 1, a sealing plate 2, a heat insulation layer 4, and a connection plate 3.
The tube plate 1 is mainly used for supporting and welding the heat exchange tube. Here, the tube sheet 1 may be a tube sheet commonly used in the art, and thus will not be described in detail. The tube sheet 1 may have a first surface and a second surface, and the first surface may be opposite to the second surface.
The closure plate 2 has a third surface and a fourth surface, with the third surface facing the fourth surface. Further, the third surface of the closing plate 2 faces the second surface of the tube plate 1.
Shrouding 2 can adopt the ND steel to make, however, the utility model discloses be not limited to this.
The heat insulation layer 4 is arranged between the second surface of the tube plate 1 and the third surface of the closing plate 2, and is respectively contacted with the second surface of the tube plate 1 and the third surface of the closing plate 2.
The heat insulation layer 4 can be a ceramic fiber cotton layer; however, the present invention is not limited thereto, and any suitable material may be used to make the insulating layer.
The attachment plate 3 connects the tube sheet 1 to the closure plate 2 so that the tube sheet 1, closure plate 2 and attachment plate 3 surround the insulating layer 4. The connecting plate 3 may connect the tube plate 1 and the closing plate 2 by welding.
Furthermore, according to an exemplary embodiment of the present invention, the dew point corrosion prevention structure for the tube heat exchanger may further include an outer structure 5 having an outer frame to which the connection plate 3 is fixed.
According to the utility model discloses a prevent dew point corrosion structure for tubular heat exchanger, fill ceramic fiber cotton in the middle of tube sheet and the shrouding, when the flue gas passes through the shrouding surface, ceramic fiber cotton has effectively completely cut off the heat transfer of flue gas and air to prevent dew point corrosion's emergence, the shrouding has anti dew point corrosion performance simultaneously. Furthermore, according to the utility model discloses a prevent that dew point corrodes structure for tubular heat exchanger has advantages such as simple structure, corrosion-resistant, can solve because of dew point corrodes and makes equipment performance reduce damage scheduling problem even.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. A dew point corrosion prevention structure for a tube heat exchanger, the dew point corrosion prevention structure comprising:
the tube plate is used for fixing a heat exchange tube of the tube type heat exchanger and is provided with a first surface and a second surface;
a sealing plate having a third surface and a fourth surface, the third surface of the sealing plate being opposite the second surface of the tube sheet;
the heat insulation layer is arranged between the second surface of the tube plate and the third surface of the sealing plate and is respectively contacted with the second surface of the tube plate and the third surface of the sealing plate; and
and an attachment plate connecting the tube sheet to the closure plate such that the tube sheet, the closure plate and the attachment plate surround the insulation layer.
2. The structure of claim 1, further comprising an external structure having an outer frame, wherein the connection plate is fixed to the outer frame.
3. The pitting corrosion prevention structure according to claim 1, wherein the heat insulating layer is a ceramic fiber wool layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921230974.3U CN210464181U (en) | 2019-08-01 | 2019-08-01 | Dew point corrosion prevention structure for tubular heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921230974.3U CN210464181U (en) | 2019-08-01 | 2019-08-01 | Dew point corrosion prevention structure for tubular heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210464181U true CN210464181U (en) | 2020-05-05 |
Family
ID=70449018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921230974.3U Active CN210464181U (en) | 2019-08-01 | 2019-08-01 | Dew point corrosion prevention structure for tubular heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210464181U (en) |
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2019
- 2019-08-01 CN CN201921230974.3U patent/CN210464181U/en active Active
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