CN201828176U - Heat pipe and heat pipe air preheater - Google Patents
Heat pipe and heat pipe air preheater Download PDFInfo
- Publication number
- CN201828176U CN201828176U CN2010205028922U CN201020502892U CN201828176U CN 201828176 U CN201828176 U CN 201828176U CN 2010205028922 U CN2010205028922 U CN 2010205028922U CN 201020502892 U CN201020502892 U CN 201020502892U CN 201828176 U CN201828176 U CN 201828176U
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- Prior art keywords
- pipe
- heat pipe
- heat
- metal
- polytetrafluoroethylene
- 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.)
- Expired - Lifetime
Links
- 239000002184 metal Substances 0.000 claims abstract description 50
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 31
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 31
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 18
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 36
- 239000003546 flue gas Substances 0.000 claims description 36
- 239000011148 porous material Substances 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 14
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 7
- 241000274582 Pycnanthus angolensis Species 0.000 claims description 7
- 239000010962 carbon steel Substances 0.000 claims description 7
- 239000011087 paperboard Substances 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 abstract description 18
- 230000007797 corrosion Effects 0.000 abstract description 18
- 239000002253 acid Substances 0.000 abstract description 16
- 238000010438 heat treatment Methods 0.000 abstract description 10
- 238000007789 sealing Methods 0.000 abstract description 8
- 210000003298 dental enamel Anatomy 0.000 abstract description 7
- 239000003245 coal Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 239000000779 smoke Substances 0.000 abstract description 3
- 239000011257 shell material Substances 0.000 description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 239000010439 graphite Substances 0.000 description 10
- 229910002804 graphite Inorganic materials 0.000 description 7
- 239000010410 layer Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 241000209456 Plumbago Species 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004021 metal welding Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 201000001371 inclusion conjunctivitis Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 206010044325 trachoma Diseases 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a heat pipe and a heat pipe air preheater, which aim to resolve problems that a pipe shell of an existing heat pipe is made of metal or a heat exchange surface of a metal heated section of the existing heat pipe is covered with an enamel layer, dew point corrosion of low-temperature smoke acid is caused when the existing heat pipe is used for the heat pipe air preheater. A pipe shell of the heat pipe consists of a metal pipe (2) and a polytetrafluoroethylene pipe (4), connecting ends of the two pipes are connected in a threaded manner, and a polytetrafluoroethylene sealing ring (3) is disposed between the two connecting ends. A metal pipe plug (1) which is connected with the metal pipe in a welded manner is arranged at the closed end of the metal pipe, and a polytetrafluoroethylene seal (41) which is connected with the polytetrafluoroethylene pipe in a welded manner is disposed at the closed end of the polytetrafluoroethylene pipe. The heat pipe air preheater adopts the heat pipe, a pipe sheet and a pipe hole sealing part are made from polytetrafluoroethylene, and a polytetrafluoroethylene plate is arranged on the inner surface of a box plate of a smoke pipe box. The heat pipe is mainly used for heat pipe air preheaters, and the heat pipe air preheater is mainly used for tubular heating furnace devices in petrochemical and coal chemical industries.
Description
Technical field
The utility model belongs to petrochemical industry, Coal Chemical Industry heat-transfer equipment field, relates to a kind of heat pipe and heat-pipe air preheater.
Background technology
In the tubular heater device of petrochemical industry, Coal Chemical Industry industry, the application of heat-pipe air preheater is very extensive; Utilize this high-performance heat transfer components of heat pipe to reclaim fume afterheat, enter the air of tubular heater, realize energy-conservation purpose with heating.The industrial heat tube elements comprises heating section and cooling section at present; Shell is generally made by carbon steel, and the ability of not anti-low-temperature flue gas acid dew piont corrosion can cause corrosion failure when using in air preheater, and then the thermal efficiency of heat-pipe air preheater is reduced even can not use.The low-temperature flue gas acid dew piont corrosion is reduced to the flue gas dew point temperature at the flue gas of heating furnace exhaust temperature and takes place when following.For solving etching problem, the heat pipe of some heat-pipe air preheater uses acid-resistant stainless steel to make shell, but this can make the cost up of heat pipe and heat-pipe air preheater, and commercial Application is very restricted.Moreover the acid-resistant stainless steel heat pipe is not very good to the effect of resisting the low-temperature flue gas acid dew piont corrosion yet.
Chinese patent CN2757083Y discloses a kind of heat-pipe air preheater that waste heat of flue gas of heating furnace reclaims that is used for, and the heat pipe of different-diameter, the alternate fin of height is housed; Heat pipe package (comprising fin) material is a metal, can not resist the low-temperature flue gas acid dew piont corrosion, can only work more than dew-point temperature.CN1427239A discloses a kind of acid corrosion aesistant enamel heat pipe element that is used for heat exchange, and its structure comprises heating section and cooling section, and hydraulic fluid (working medium) is arranged in the pipe.The matrix material of heat pipe is a carbon steel, has one deck enamel layer on the heating section heat-transfer surface; The thickness of enamel layer is 0.3～0.8 millimeter.The problem that exists is in the enamel layer sintering process, to be prone to defectives such as pin hole, trachoma, and to be difficult for testing out; In the use, the formed dilute sulfuric acid of the sulfide in the flue gas can cause heat pipe failure, and reduced the service life of the air preheater that adopts this heat pipe through the defective corrosion carbon steel tube wall on enamel layer surface.CN2214657Y discloses a kind of Graphite thermal tube, at the hollow plumbago pipe end graphite plug is housed, and between graphite plug and hollow plumbago pipe the graphite adhesive layer is arranged, and in the hollow plumbago pipe hydraulic fluid is housed; Have heat transfer efficiency height, advantage such as corrosion-resistant.The problem that exists when being used for heat-pipe air preheater is, graphite-pipe has certain fragility, and bending strength is lower; When the heat pipe length of making is longer, fracture easily.By adhering and sealing, sealing reliability is not high, easily causes refrigerant leakage between graphite-pipe two ends and the set graphite plug, thereby the heat transfer efficiency of Graphite thermal tube is reduced or loses efficacy.
Summary of the invention
Technical problem to be solved in the utility model is: existing shell material is that low-temperature flue gas acid dew piont corrosion, shell material take place when being used for heat-pipe air preheater is problems such as the heat pipe length of graphite fractures when longer easily and sealing reliability is not high for heat pipe that metal or metal heated section heat-transfer surface cover enamel layer.
For addressing the above problem, the technical solution adopted in the utility model is: a kind of heat pipe, be provided with shell, working medium is housed in the shell, it is characterized in that: described shell is made up of metal tube and polyfluortetraethylene pipe, metal tube and polyfluortetraethylene pipe respectively have a link and a blind end, the link of metal tube and the link of polyfluortetraethylene pipe are by being threaded, be provided with teflin ring between two links, the blind end of metal tube is provided with the metal pipe close that is welded to connect with it, and the blind end of polyfluortetraethylene pipe is provided with the polytetrafluoroethylene (PTFE) end socket that is welded to connect with it.
A kind of heat-pipe air preheater, be provided with heat pipe, air bobbin carriage and flue gas bobbin carriage, be provided with tube sheet between air bobbin carriage and the flue gas bobbin carriage, tube sheet is provided with pore, be provided with the pore seal between heat pipe and the pore, it is characterized in that: heat pipe is above-mentioned heat pipe of the present utility model, the metal tube of heat pipe is located in the air bobbin carriage, polyfluortetraethylene pipe is located in the flue gas bobbin carriage, the material of tube sheet and pore seal is a polytetrafluoroethylene (PTFE), the pore seal is located between polyfluortetraethylene pipe and the pore, and the inner surface of flue gas bobbin carriage boxboard is provided with polyfluortetraethylene plate.
Adopt the utility model, have following beneficial effect: (1) heat pipe of the present utility model, shell is made up of metal tube and polyfluortetraethylene pipe, is a kind of heat pipe of combined type.When being used for heat-pipe air preheater, the polyfluortetraethylene pipe of heat pipe is located in the flue gas bobbin carriage, and the polytetrafluoroethylene (PTFE) pipeline section absorbs the heat of flue gas as the heating section of heat pipe; Utilize the superpower corrosion resistance to sulfuric acid of polytetrafluoroethylmaterial material, resist low-temperature flue gas acid dew piont corrosion (polytetrafluoroethylmaterial material can be used safely in the temperature below 260 ℃).Because air does not have corrosivity basically, so the metal tube of heat pipe is located in the air bobbin carriage.Metal section is used for to the air release heat as the cooling section of heat pipe.(2) shell of heat pipe is made up of metal tube and polyfluortetraethylene pipe, between metal tube and the polyfluortetraethylene pipe, between the blind end and metal pipe close of metal tube, between the blind end and polytetrafluoroethylene (PTFE) end socket of polyfluortetraethylene pipe, connect firm, good seal, reliability height, make heat pipe have bending strength preferably, when heat pipe length is longer, also be not easy to fracture.Simultaneously, because the sealing reliability height can prevent the leakage of working medium in the heat pipe effectively, heat pipe can be used reliably.(3) heat-pipe air preheater of the present utility model adopts heat pipe of the present utility model, the material of tube sheet and pore seal adopts polytetrafluoroethylene (PTFE) simultaneously, and polyfluortetraethylene plate is set, thereby can prevent each parts generation low-temperature flue gas acid dew piont corrosion in the flue gas bobbin carriage effectively at the inner surface of flue gas bobbin carriage boxboard.
Because more than, heat pipe of the present utility model and heat-pipe air preheater can long period, uses safely under lower smog discharge temperature.In addition,, make the cost of the utility model heat pipe and heat-pipe air preheater not high, can not be restricted because of the cost problem makes its commercial Application because the price of polytetrafluoroethylmaterial material is not high.
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.The drawings and specific embodiments do not limit the claimed scope of the utility model.
Description of drawings
Fig. 1 is the utility model heat pipe cutaway view vertically.
Fig. 2 is the structural representation of the utility model heat-pipe air preheater.
Also show set pore seal between the polyfluortetraethylene pipe of the tube sheet of heat-pipe air preheater and heat pipe and the pore on the tube sheet among Fig. 1.Among Fig. 1 to Fig. 2, same reference numerals is represented identical technical characterictic.
The specific embodiment
Referring to Fig. 1, heat pipe of the present utility model is provided with shell, and working medium 5 is housed in the shell.Shell is made up of metal tube 2 and polyfluortetraethylene pipe 4, and metal tube 2 and polyfluortetraethylene pipe 4 respectively have a link and a blind end.The link of the link of metal tube 2 and polyfluortetraethylene pipe 4 is provided with teflin ring 3 by being threaded between two links.The blind end of metal tube 2 is provided with the metal pipe close 1 that is welded to connect with it, is welded as seal welding.Have aperture on the metal pipe close 1, feed to the usefulness that charges into working medium in the heat pipe package and vacuumize.The blind end of polyfluortetraethylene pipe 4 is provided with the polytetrafluoroethylene (PTFE) end socket 41 that is welded to connect with it, and welding also is a seal welding.
Among Fig. 1, the screw thread of metal tube 2 links is an internal thread, and the screw thread of polyfluortetraethylene pipe 4 links is an external screw thread.The diameter of internal thread hole forms boss greater than the interior diameter of metal tube 2 in the bottom of internal thread hole.Teflin ring 3 is located between the termination of this boss and polyfluortetraethylene pipe 4 links; After the screw thread of metal tube 2 and polyfluortetraethylene pipe 4 links screwed, teflin ring 3 was compacted, realized sealing.
Heat pipe of the present utility model, metal tube 2 can be finned tube or light pipe; Metal tube 2 shown in Figure 1 is a finned tube.The material of metal tube 2 and metal pipe close 1 is generally carbon steel or stainless steel.Polyfluortetraethylene pipe 4 is a light pipe.
Heat pipe of the present utility model, after the screw thread of polytetrafluoroethylene (PTFE) end socket 41, metal tube 2 links and polyfluortetraethylene pipe 4 links in the blind end welding of metal pipe close 1, polyfluortetraethylene pipe 4 in the blind end welding of metal tube 2 screwed, the aperture on metal pipe close 1 charged into working medium in heat pipe package; Working medium is water, ethanol or toluene etc.After working medium filled and finishes, the aperture opposite heat tube shell inside on metal pipe close 1 vacuumized again.Afterwards, with this aperture welded seal, promptly finished the manufacturing of the utility model heat pipe.
Referring to Fig. 2, heat-pipe air preheater of the present utility model is provided with heat pipe, air bobbin carriage 8 and flue gas bobbin carriage 9, is provided with tube sheet 7 between air bobbin carriage 8 and the flue gas bobbin carriage 9.Tube sheet 7 is provided with pore, and heating tube passes; Be provided with pore seal 6 between heat pipe and the pore.Heat pipe is above-mentioned heat pipe of the present utility model; The metal tube 2 of heat pipe is located in the air bobbin carriage 8, and polyfluortetraethylene pipe 4 is located in the flue gas bobbin carriage 9.Among Fig. 2, heat pipe is not analysed and observe.Polytetrafluoroethylene (PTFE) pipeline section (comprising in running order working medium in polyfluortetraethylene pipe 4 and the pipe) as the heating section of heat pipe, is used to absorb the heat of flue gas.Metal section (comprising in running order working medium in metal tube 2 and the pipe) as the cooling section of heat pipe, is used for to the air release heat.
Existing heat-pipe air preheater, the material of the tube sheet between flue gas bobbin carriage and the air bobbin carriage is generally carbon steel, has low-temperature flue gas acid dew piont corrosion problem.Heat-pipe air preheater of the present utility model, the material of tube sheet 7 are polytetrafluoroethylene (PTFE), can prevent the low-temperature flue gas acid dew piont corrosion.Heat pipe of the present utility model, polyfluortetraethylene pipe 4 is passed by the pore on the tube sheet 7, stretches in the air bobbin carriage 8 a bit of (referring to Fig. 2 and Fig. 1); Pore seal 6 is located between polyfluortetraethylene pipe 4 and the pore.Existing heat-pipe air preheater, the material of flue gas bobbin carriage boxboard is generally carbon steel, and also there is low-temperature flue gas acid dew piont corrosion problem in its inner surface.Heat-pipe air preheater of the present utility model is provided with polyfluortetraethylene plate 10 at the inner surface of flue gas bobbin carriage 9 boxboards, can prevent boxboard inner surface generation low-temperature flue gas acid dew piont corrosion.Polyfluortetraethylene plate 10 normally uses adhesive (for example phenolic resins) to be bonded on the boxboard inner surface.
Because tube sheet 7 is identical with the material of polyfluortetraethylene pipe 4, thereby needn't worry the influence that thermal expansion difference brings.Cooperating between polyfluortetraethylene pipe 4 and the pore seal 6, between pore seal 6 and the pore, be tight fit.The material of pore seal 6 also adopts polytetrafluoroethylene (PTFE), can prevent the low-temperature flue gas acid dew piont corrosion.And its thermal coefficient of expansion is big, hotly down can keep good sealing, and air leakage coefficient is little; Greasy property is good, and polyfluortetraethylene pipe 4 can freely be stretched, and can keep good soft the contact between polyfluortetraethylene pipe 4 and the pore seal 6.
Heat-pipe air preheater of the present utility model, operation in the usual way.Wherein, the smoke inlet temperature is generally 180～250 ℃, and the exhanst gas outlet temperature is generally 100～120 ℃, and air generally is preheating to 80～100 ℃.Detailed operating process explanation is omitted.Among Fig. 2, with filled arrows the flow direction of flue gas is shown, hollow arrow illustrates the flow direction of air.
Heat pipe of the present utility model is mainly used in heat-pipe air preheater, and heat-pipe air preheater is mainly used in the tubular heater device of petrochemical industry, Coal Chemical Industry industry.
Claims (3)
1. heat pipe, be provided with shell, working medium (5) is housed in the shell, it is characterized in that: described shell is made up of metal tube (2) and polyfluortetraethylene pipe (4), metal tube (2) and polyfluortetraethylene pipe (4) respectively have a link and a blind end, the link of the link of metal tube (2) and polyfluortetraethylene pipe (4) is by being threaded, be provided with teflin ring (3) between two links, the blind end of metal tube (2) is provided with the metal pipe close (1) that is welded to connect with it, and the blind end of polyfluortetraethylene pipe (4) is provided with the polytetrafluoroethylene (PTFE) end socket (41) that is welded to connect with it.
2. heat pipe according to claim 1 is characterized in that: metal tube (2) is finned tube or light pipe, and the material of metal tube (2) and metal pipe close (1) is carbon steel or stainless steel, and polyfluortetraethylene pipe (4) is a light pipe.
3. heat-pipe air preheater, be provided with heat pipe, air bobbin carriage (8) and flue gas bobbin carriage (9), be provided with tube sheet (7) between air bobbin carriage (8) and the flue gas bobbin carriage (9), tube sheet (7) is provided with pore, be provided with pore seal (6) between heat pipe and the pore, it is characterized in that: heat pipe is the described heat pipe of claim 1, the metal tube of heat pipe (2) is located in the air bobbin carriage (8), polyfluortetraethylene pipe (4) is located in the flue gas bobbin carriage (9), tube sheet (7) is a polytetrafluoroethylene (PTFE) with the material of pore seal (6), pore seal (6) is located between polyfluortetraethylene pipe (4) and the pore, and the inner surface of flue gas bobbin carriage (9) boxboard is provided with polyfluortetraethylene plate (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205028922U CN201828176U (en) | 2010-08-25 | 2010-08-25 | Heat pipe and heat pipe air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205028922U CN201828176U (en) | 2010-08-25 | 2010-08-25 | Heat pipe and heat pipe air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201828176U true CN201828176U (en) | 2011-05-11 |
Family
ID=43966703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205028922U Expired - Lifetime CN201828176U (en) | 2010-08-25 | 2010-08-25 | Heat pipe and heat pipe air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201828176U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102285645A (en) * | 2011-06-17 | 2011-12-21 | 中国海洋石油总公司 | Heat pipe heat exchanger sulfur melting device and special heat pipe thereof |
| CN102384684A (en) * | 2011-09-09 | 2012-03-21 | 长春当代信息产业集团有限公司 | Gas-gas type heat exchanger capable of resisting low temperature corrosion |
| CN106040030A (en) * | 2016-07-26 | 2016-10-26 | 中国瑞林工程技术有限公司 | Liquid distributor and packed tower with same |
| CN106959031A (en) * | 2015-11-20 | 2017-07-18 | 宜诺工程股份有限公司 | Heat exchanger |
| TWI719589B (en) * | 2019-08-16 | 2021-02-21 | 鄭園譯 | Heat pipe |
-
2010
- 2010-08-25 CN CN2010205028922U patent/CN201828176U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102285645A (en) * | 2011-06-17 | 2011-12-21 | 中国海洋石油总公司 | Heat pipe heat exchanger sulfur melting device and special heat pipe thereof |
| CN102384684A (en) * | 2011-09-09 | 2012-03-21 | 长春当代信息产业集团有限公司 | Gas-gas type heat exchanger capable of resisting low temperature corrosion |
| CN106959031A (en) * | 2015-11-20 | 2017-07-18 | 宜诺工程股份有限公司 | Heat exchanger |
| CN106040030A (en) * | 2016-07-26 | 2016-10-26 | 中国瑞林工程技术有限公司 | Liquid distributor and packed tower with same |
| TWI719589B (en) * | 2019-08-16 | 2021-02-21 | 鄭園譯 | Heat pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Co-patentee after: Luoyang Petrochemical Engineering Corporation /SINOPEC Patentee after: Sinopec Corp. Address before: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Co-patentee before: Luoyang Petrochemical Engineering Co., China Petrochemical Group Patentee before: Sinopec Corp. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110511 |