CN216245771U - Steel-based polytetrafluoroethylene heat exchange tube - Google Patents

Steel-based polytetrafluoroethylene heat exchange tube Download PDF

Info

Publication number
CN216245771U
CN216245771U CN202121985231.4U CN202121985231U CN216245771U CN 216245771 U CN216245771 U CN 216245771U CN 202121985231 U CN202121985231 U CN 202121985231U CN 216245771 U CN216245771 U CN 216245771U
Authority
CN
China
Prior art keywords
heat exchange
exchange tube
layer
steel
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202121985231.4U
Other languages
Chinese (zh)
Inventor
李平
刘健
宋瑞鹏
魏超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shaanxi Yulin Energy Group Hengshan Coal Power Co ltd
Original Assignee
Shaanxi Yulin Energy Group Hengshan Coal Power Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shaanxi Yulin Energy Group Hengshan Coal Power Co ltd filed Critical Shaanxi Yulin Energy Group Hengshan Coal Power Co ltd
Priority to CN202121985231.4U priority Critical patent/CN216245771U/en
Application granted granted Critical
Publication of CN216245771U publication Critical patent/CN216245771U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The application provides a steel-based polytetrafluoroethylene heat exchange tube which comprises a pressure-resistant layer, a heat conducting layer and a first anticorrosive layer, wherein the heat conducting layer is positioned between the pressure-resistant layer and the first anticorrosive layer, and the pressure-resistant layer is closer to the inside of the tube of the heat exchange tube than the first anticorrosive layer; the pressure-resistant layer is made of a steel base material, and the first anti-corrosion layer is made of polytetrafluoroethylene. The steel-based polytetrafluoroethylene heat exchange tube provided by the application adopts polytetrafluoroethylene as the first anticorrosive layer, so that the phenomenon of low-temperature corrosion of the heat exchange tube is avoided, and the service life of the heat exchange tube is prolonged; the application adopts the steel-based material as the pressure-resistant layer, so that the pressure resistance of the polytetrafluoroethylene heat exchange tube can be improved; set up the heat-conducting layer between withstand voltage layer and first anticorrosive coating, can improve the heat exchange efficiency of heat exchange tube, reduce calorific loss.

Description

Steel-based polytetrafluoroethylene heat exchange tube
Technical Field
The application relates to a pipe, in particular to a steel-based polytetrafluoroethylene heat exchange pipe.
Background
In the power generation and chemical industry, a large amount of acid flue gas waste heat is discharged, so that the heat exchanger is adopted to recover the part of heat. In general, a medium with low temperature flows in a heat exchange tube in a heat exchanger, acid flue gas with high temperature flows outside the heat exchange tube, and waste heat of the acid flue gas is recovered through heat exchange. In the prior art, the heat exchange tube is made of a metal single layer, heat exchange recovery is carried out through the heat conductivity of metal, and the heat exchange tube is easy to have a low-temperature corrosion phenomenon in the long-term operation process.
SUMMERY OF THE UTILITY MODEL
The application provides a steel-based polytetrafluoroethylene heat exchange tube for solve above-mentioned heat exchange tube and easily appear the problem of low temperature corrosion phenomenon.
The application provides a steel-based polytetrafluoroethylene heat exchange tube, wherein a tube of the steel-based polytetrafluoroethylene heat exchange tube comprises a pressure-resistant layer, a heat conducting layer and a first anticorrosive layer, the heat conducting layer is positioned between the pressure-resistant layer and the first anticorrosive layer, and the pressure-resistant layer is closer to the inside of the tube of the heat exchange tube than the first anticorrosive layer;
the pressure-resistant layer is made of a steel base material, and the first anti-corrosion layer is made of polytetrafluoroethylene.
Optionally, the pipe further comprises: and the second anticorrosive layer is closer to the inside of the pipe of the heat exchange pipe than the pressure-resistant layer.
Optionally, the second anticorrosive layer is a ceramic coating.
Optionally, the thickness of the second anticorrosive layer is 0.3-0.8 mm.
Optionally, the thickness of the pressure-resistant layer is 1-3 mm.
Optionally, the heat conducting layer is made of graphite.
Optionally, the thickness of the heat conduction layer is 1-3 mm.
Optionally, the thickness of the first anticorrosive layer is 1-3 mm.
The utility model has the following beneficial effects:
according to the steel-based polytetrafluoroethylene heat exchange tube, the polytetrafluoroethylene is used as the first anticorrosive layer, so that the phenomenon of low-temperature corrosion of the heat exchange tube in the use process can be avoided, and the service life of the heat exchange tube is prolonged; the steel-based material is used as a pressure-resistant layer, so that the pressure resistance of the pipe can be greatly improved; the heat conduction layer is added between the pressure-resistant layer and the first anti-corrosion layer, so that the heat exchange efficiency of the heat exchange tube can be improved, and the heat loss is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of layers of a steel-based PTFE heat exchange tube according to an embodiment of the present disclosure;
FIG. 2 is a cross-sectional view of a steel-based polytetrafluoroethylene heat exchange tube according to an embodiment of the present application;
FIG. 3 is a schematic representation of the layers in a steel-based PTFE heat exchange tube according to another embodiment of the present application;
fig. 4 is a cross-sectional view of a steel-based ptfe heat exchange tube according to another embodiment of the present application.
Description of reference numerals:
10: a pressure-resistant layer;
20: a heat conductive layer;
30: a first anticorrosive layer;
40: and a second anticorrosive layer.
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 are clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present application, but not all of the embodiments. 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.
FIG. 1 is a schematic view of the layers in a steel-based PTFE heat exchange tube according to an embodiment of the present application,
fig. 2 is a cross-sectional view of a steel-based polytetrafluoroethylene heat exchange tube provided in an embodiment of the present application, and as shown in fig. 1 and fig. 2, a tube of the steel-based polytetrafluoroethylene heat exchange tube provided in the embodiment of the present application includes a pressure resistance layer 10, a heat conduction layer 20 and a first corrosion prevention layer 30, the heat conduction layer 20 is located between the pressure resistance layer 10 and the first corrosion prevention layer 30, and the pressure resistance layer 20 is closer to the inside of the tube of the heat exchange tube than the first corrosion prevention layer 30.
When the heat exchange tube works, acid high-temperature flue gas is arranged outside the heat exchange tube, wherein the acid high-temperature flue gas contains acid gases such as sulfur dioxide, sulfur trioxide and the like, and low-temperature media such as normal-temperature or low-temperature water, air and the like are arranged inside the heat exchange tube. When the acidic high-temperature flue gas contacts the heat exchange tube, energy exchange occurs, namely the heat exchange tube absorbs heat in the acidic high-temperature flue gas, the heat exchange tube conducts the part of heat to a low-temperature medium in the heat exchange tube, and waste heat recovery of the high-temperature acidic flue gas is completed through the process. The high-temperature acidic flue gas becomes low-temperature acidic flue gas after absorbing heat through the heat exchange tube, acidic substances in the low-temperature acidic flue gas and water vapor in flue gas or atmosphere are easy to generate acidic steam on the low-temperature side of the heat exchange tube, and the acidic steam is easy to condense on the low-temperature side of the heat exchange tube, so that low-temperature corrosion is generated. This application uses inert material polytetrafluoroethylene to effectively avoid the appearance of the low temperature corrosion phenomenon of heat exchange tube as first anticorrosive coating 30. And when the heat exchange tube works, a low-temperature medium is introduced into the tube, so that the heat exchange tube is required to have certain pressure resistance, and the steel base material is used as the pressure resistance layer 10, so that the pressure resistance of the heat exchange tube can be improved. Simultaneously, the heat exchange tube still needs higher heat exchange efficiency to reduce calorific loss, this application adds heat-conducting layer 20 between the resistance to pressure layer 10 that the steel base material made and the first anticorrosive coating 30 that polytetrafluoroethylene made, can improve the heat exchange efficiency of heat exchange tube, reduce calorific loss.
Fig. 3 is a schematic view of each layer in a steel-based ptfe heat exchange tube according to another embodiment of the present application, and fig. 4 is a cross-sectional view of the steel-based ptfe heat exchange tube according to another embodiment of the present application, as shown in fig. 3 and fig. 4, the steel-based ptfe heat exchange tube according to this embodiment further includes, based on the above embodiments: and the second anticorrosive layer 40 is closer to the inside of the pipe of the heat exchange pipe than the pressure-resistant layer 10.
Optionally, the second anticorrosive layer 40 is a ceramic coating, and a low-temperature medium is arranged in the heat exchange tube, so that when the heat exchange tube works for a long time, the low-temperature medium in the heat exchange tube can corrode the pressure-resistant layer 10 made of a steel base material, the ceramic coating is used as the second anticorrosive layer 40, the heat exchange tube can be prevented from being corroded by fluid in the tube, and meanwhile, the ceramic coating has the characteristic of wear resistance, and the inner wall of the heat exchange tube can be effectively protected.
Optionally, the thickness of the second anticorrosive layer 40 is 0.3-0.8 mm.
Optionally, the thickness of the pressure resistance layer 10 is 1-3 mm, the pressure resistance layer 10 is the main body part of the heat exchange tube, the pressure resistance layer has the functions of supporting the tube body and resisting pressure, and the moderate wall thickness can have the functions of resisting pressure, reducing thermal resistance and reducing heat.
Optionally, the heat conducting layer 20 is made of graphite. Furthermore, the heat conduction layer 20 is made of graphite powder with the granularity of 400 meshes, the heat conduction performance of graphite is excellent, and the graphite is used as the heat conduction layer, so that the heat loss can be effectively reduced, and the working efficiency of the heat exchange tube is improved.
Optionally, the thickness of the heat conduction layer 20 is 1-3 mm.
Optionally, the thickness of the first anticorrosive layer 30 is 1-3 mm.
Example 1
The steel-based polytetrafluoroethylene heat exchange tube with the following structure is prepared:
as shown in fig. 3 or 4, the steel-based polytetrafluoroethylene heat exchange tube comprises, from inside to outside, a first anticorrosive layer composed of a ceramic coating, a pressure-resistant layer composed of a steel material, a heat-conducting layer filled with graphite powder, and a second anticorrosive layer composed of a polytetrafluoroethylene coating, wherein the ceramic coating is 0.3mm thick, the pressure-resistant layer composed of a steel material is 1mm thick, the heat-conducting layer filled with graphite powder is 1mm thick, and the polytetrafluoroethylene coating is 3mm thick.
Example 2
The steel-based polytetrafluoroethylene heat exchange tube with the following structure is prepared:
as shown in fig. 3 or 4, the steel-based polytetrafluoroethylene heat exchange tube comprises, from inside to outside, a first anticorrosive layer composed of a ceramic coating, a pressure-resistant layer composed of a steel material, a heat-conducting layer filled with graphite powder, and a second anticorrosive layer composed of a polytetrafluoroethylene coating, wherein the ceramic coating is 0.8mm thick, the pressure-resistant layer composed of a steel material is 1mm thick, the heat-conducting layer filled with graphite powder is 2mm thick, and the polytetrafluoroethylene coating is 1mm thick.
Example 3
The steel-based polytetrafluoroethylene heat exchange tube with the following structure is prepared:
as shown in fig. 3 or 4, the steel-based polytetrafluoroethylene heat exchange tube comprises, from inside to outside, a first anticorrosive layer composed of a ceramic coating, a pressure-resistant layer composed of a steel material, a heat-conducting layer filled with graphite powder, and a second anticorrosive layer composed of a polytetrafluoroethylene coating, wherein the ceramic coating is 0.4mm thick, the pressure-resistant layer composed of a steel material is 1mm thick, the heat-conducting layer filled with graphite powder is 3mm thick, and the polytetrafluoroethylene coating is 1mm thick.
Example 4
The steel-based polytetrafluoroethylene heat exchange tube with the following structure is prepared:
as shown in fig. 3 or fig. 4, a steel-based polytetrafluoroethylene heat exchange tube comprises, from inside to outside, a first anticorrosive layer composed of a ceramic coating, a pressure-resistant layer composed of a steel material, a heat-conducting layer filled with graphite powder, and a second anticorrosive layer composed of a polytetrafluoroethylene coating, wherein the ceramic coating is 0.4mm thick, the pressure-resistant layer composed of a steel material is 3mm thick, the heat-conducting layer filled with graphite powder is 1mm thick, and the polytetrafluoroethylene coating is 1mm thick.
Example 5
The steel-based polytetrafluoroethylene heat exchange tube with the following structure is prepared:
as shown in fig. 3 or 4, the steel-based polytetrafluoroethylene heat exchange tube comprises, from inside to outside, a first anticorrosive layer composed of a ceramic coating, a pressure-resistant layer composed of a steel material, a heat-conducting layer filled with graphite powder, and a second anticorrosive layer composed of a polytetrafluoroethylene coating, wherein the ceramic coating is 0.3mm thick, the pressure-resistant layer composed of a steel material is 2mm thick, the heat-conducting layer filled with graphite powder is 1mm thick, and the polytetrafluoroethylene coating is 2mm thick.
Example 6
The steel-based polytetrafluoroethylene heat exchange tube with the following structure is prepared:
as shown in fig. 1 or fig. 2, a steel-based polytetrafluoroethylene heat exchange tube comprises, from inside to outside, a pressure-resistant layer made of a steel material, a heat-conducting layer filled with graphite powder, and a first anticorrosive layer made of a polytetrafluoroethylene coating, wherein the thickness of the pressure-resistant layer made of the steel material is 1mm, the thickness of the heat-conducting layer filled with graphite powder is 2mm, and the thickness of the polytetrafluoroethylene coating is 2 mm.
Example 7
The steel-based polytetrafluoroethylene heat exchange tube with the following structure is prepared:
as shown in fig. 1 or fig. 2, a steel-based polytetrafluoroethylene heat exchange tube comprises, from inside to outside, a pressure-resistant layer made of a steel material, a heat-conducting layer filled with graphite powder, and a first anticorrosive layer made of a polytetrafluoroethylene coating, wherein the thickness of the pressure-resistant layer made of the steel material is 2mm, the thickness of the heat-conducting layer filled with graphite powder is 1mm, and the thickness of the polytetrafluoroethylene coating is 1 mm.
Example 8
The steel-based polytetrafluoroethylene heat exchange tube with the following structure is prepared:
as shown in fig. 1 or fig. 2, a steel-based polytetrafluoroethylene heat exchange tube comprises, from inside to outside, a pressure-resistant layer made of a steel material, a heat-conducting layer filled with graphite powder, and a first anticorrosive layer made of a polytetrafluoroethylene coating, wherein the thickness of the pressure-resistant layer made of the steel material is 3mm, the thickness of the heat-conducting layer filled with graphite powder is 1mm, and the thickness of the polytetrafluoroethylene coating is 1 mm.
Example 9
The steel-based polytetrafluoroethylene heat exchange tube with the following structure is prepared:
as shown in fig. 1 or fig. 2, a steel-based polytetrafluoroethylene heat exchange tube comprises, from inside to outside, a pressure-resistant layer made of a steel material, a heat-conducting layer filled with graphite powder, and a first anticorrosive layer made of a polytetrafluoroethylene coating, wherein the thickness of the pressure-resistant layer made of the steel material is 1mm, the thickness of the heat-conducting layer filled with graphite powder is 1mm, and the thickness of the polytetrafluoroethylene coating is 3 mm.
According to GB/T21833.1-2020 part 1 of Austenite-ferrite type duplex stainless steel seamless steel pipe: the performance indexes of the steel-based polytetrafluoroethylene heat exchange tubes with the structures of examples 1-5 are measured according to the standards of tubes for heat exchangers, and the results are shown in the table I:
watch 1
As can be seen from the table I, the steel-based polytetrafluoroethylene heat exchange tube provided by the application has pressure resistance and corrosion resistance which completely meet the requirements of GB/T21833.1-2020 standard.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (8)

1. A steel-based polytetrafluoroethylene heat exchange tube is characterized in that a tube of the steel-based polytetrafluoroethylene heat exchange tube comprises a pressure-resistant layer, a heat conducting layer and a first anticorrosive layer, wherein the heat conducting layer is positioned between the pressure-resistant layer and the first anticorrosive layer, and the pressure-resistant layer is closer to the inside of the tube of the heat exchange tube than the first anticorrosive layer;
the pressure-resistant layer is made of a steel base material, and the first anti-corrosion layer is made of polytetrafluoroethylene.
2. The steel-based polytetrafluoroethylene heat exchange tube according to claim 1, wherein said tube further comprises: and the second anticorrosive layer is closer to the inside of the pipe of the heat exchange pipe than the pressure-resistant layer.
3. The steel-based polytetrafluoroethylene heat exchange tube according to claim 2, wherein the second corrosion resistant layer is a ceramic coating.
4. The steel-based polytetrafluoroethylene heat exchange tube according to claim 2 or 3, wherein the thickness of the second anticorrosive layer is 0.3-0.8 mm.
5. The steel-based polytetrafluoroethylene heat exchange tube according to claim 1, wherein the thickness of the pressure-resistant layer is 1-3 mm.
6. The steel-based polytetrafluoroethylene heat exchange tube according to claim 1, wherein the heat conducting layer is made of graphite.
7. The steel-based polytetrafluoroethylene heat exchange tube according to claim 1 or 6, wherein the thickness of the heat conduction layer is 1-3 mm.
8. The steel-based polytetrafluoroethylene heat exchange tube according to claim 1 or 6, wherein the thickness of the first anticorrosive layer is 1-3 mm.
CN202121985231.4U 2021-08-23 2021-08-23 Steel-based polytetrafluoroethylene heat exchange tube Active CN216245771U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121985231.4U CN216245771U (en) 2021-08-23 2021-08-23 Steel-based polytetrafluoroethylene heat exchange tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121985231.4U CN216245771U (en) 2021-08-23 2021-08-23 Steel-based polytetrafluoroethylene heat exchange tube

Publications (1)

Publication Number Publication Date
CN216245771U true CN216245771U (en) 2022-04-08

Family

ID=80981424

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202121985231.4U Active CN216245771U (en) 2021-08-23 2021-08-23 Steel-based polytetrafluoroethylene heat exchange tube

Country Status (1)

Country Link
CN (1) CN216245771U (en)

Similar Documents

Publication Publication Date Title
CN203454867U (en) Highly-corrosive resistant shell and tube heat exchanger
CN201561549U (en) Electric water heater
CN216245771U (en) Steel-based polytetrafluoroethylene heat exchange tube
CN201828176U (en) Heat pipe and heat pipe air preheater
CN202145112U (en) Elliptical finned tube with nickel-based brazing coating
CN204830965U (en) Compound high -efficient heat exchange tube of titanium copper
CN201437988U (en) Heat pipe air preheater
CN100353136C (en) Anti-corrosion copper condensing heat exchanger utilizing smoke heat energy, and manufacturing method thereof
CN204705239U (en) Corrosion-resistant carborundum tubular heat exchanger
CN201740432U (en) Ni-P coating heat exchanger
CN201463674U (en) Heat pipe and air preheater with same
CN201152708Y (en) Corrosion and high pressure resistant tube-shell type heat exchanger
CN215003129U (en) Copper steel base graphite polytetrafluoroethylene heat exchange tube
CN202522111U (en) Bimetal finned heat pipe
CN202361850U (en) Corrosion-resistant gas-liquid type gravity assisted heat pipe heat exchanger
CN206274229U (en) A kind of New enamel formula radial heat exchanger
CN212409449U (en) Titanium alloy spiral heat pipe assembly
CN210891741U (en) Composite heat exchanger for corrosion resistance and high heat exchange efficiency
CN100507426C (en) Compact and lamella heat exchanger made of heat-conductive complex material
CN2911599Y (en) Copper anticorrosion condensing heat exchanger utilizing flue gas heat
CN204705238U (en) Sealed single-pipe carborundum tubular heat exchanger
CN204388664U (en) A kind of corrosion resistant enamel finned tube exchanger
CN207963232U (en) A kind of sewage heat source pump heat-exchanger rig
CN214620817U (en) Connecting tight seal
CN215984119U (en) Integrated heat exchanger

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant