CN1731063A - Anti-corrosive double axial flow spiral-plate heat exchange with outwards drawn heat exchange core - Google Patents
Anti-corrosive double axial flow spiral-plate heat exchange with outwards drawn heat exchange core Download PDFInfo
- Publication number
- CN1731063A CN1731063A CN 200510041521 CN200510041521A CN1731063A CN 1731063 A CN1731063 A CN 1731063A CN 200510041521 CN200510041521 CN 200510041521 CN 200510041521 A CN200510041521 A CN 200510041521A CN 1731063 A CN1731063 A CN 1731063A
- Authority
- CN
- China
- Prior art keywords
- heat exchange
- corrosion
- heat exchanger
- exchange core
- axial flow
- 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.)
- Granted
Links
Images
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The present invention relates to one kind of anticorrosive double axial flow spiral plate type heat exchanger with heat exchange core capable of being withdrawn, and the heat exchanger is suitable for heat exchange of corrosive medium, especially marine condenser with sea water as cooling medium in marine petroleum extracting platform, marine ship and coastal factory. The heat exchanger with sea water as cooling medium requires sea water corrosion resistance, small size, light weight, high heat transfer efficiency, reliable running and simple maintenance. The heat exchanger of the present invention has heat exchange core assembly made of anticorrosive metal, carbon steel casing assembly, detachable static sealing in between, ribbed and finned heat transfer base plate, etc. and can meet the said requirements.
Description
Affiliated technical field
The present invention relates to the corrosion-resistant double axial flow spiral heat exchanger that a kind of heat exchange core can be taken out outward, it is applicable in the heat exchange operating mode of Korrosionsmedium, is specially adapted to offshore production platform, naval vessel, ocean and the coastal factory heat exchanger of seawater as cooling medium.
Background technology
Along with the development of chemical industry, aggressive chemistry preparation range of application enlarges day by day, and offshore oil production platform and naval vessel directly use seawater as cooling medium, all press for the heat exchanger of fine corrosion resistance.For solving the corrosion difficult problem of Korrosionsmedium necessary heat exchanger in production and use, the industrial heat exchanger that occurred multiple with the resistant material manufacturing.Nonmetallic have graphite, glass, a pottery, the heat exchanger that has various stainless steels, corrosion resisting alloy, titanium, tantalum, zirconium etc. to make of metal.Graphite, glass, ceramic frangible, the heat conductivility of glass, pottery is poor, and the heat exchanger volume of making is big, the thermal efficiency is low.Corrosion-resistant metal materials cost an arm and a leg.The whole heat exchanger that welding is good carries out the Ni-P plating, be industrial a kind of raising corrosion resistance technology that oneself adopts, but difficulty is that quality of coating can't be picked up and test, and can not guarantee heat exchanger reliability in use.(publication number: CN1538137A) (application number: the CN200510038575.3 first trial is qualified, is about to open with " a kind of spiral corrugated plate heat exchanger " for " a kind of detachable withstand voltage multipass double axial flow spiral heat exchanger " invented by the applicant.) have that compactedness is good, floor space is little, deadweight and Operating Weight is light, heat transfer efficiency is high, significant comparable advantage such as reliable, easy to maintenance.Though the application that the former has succeeded on the large scale industry device of certain petrochemical industry limited company oil plant; but; the material that spiral plate heat exchange core is adopted still is 304 not high stainless steels of corrosion-resistant degree; because weldering property is good mutually for the carbon steel of 304 steel and manufacturing shell; adopt conventional welding procedure; guarantee the sealing between heat exchanger two fluids, on making, have no problem.But when adopting the higher metal of corrosion resistance (when making the heat exchange core as titanium, tantalum, zirconium etc.), weldering property is very poor mutually with carbon steel owing to them, guarantees the sealing between heat exchanger two fluids, on making very big difficulty is arranged.Though from technological layer, also adopt the resistant material the same to make heat exchanger on shell and be possible, be very unreasonable economically with the heat exchange core.
Summary of the invention
The objective of the invention is to: in the advantage that keeps IV type spiral heat exchanger, rely on useful technical measures, reduce the consumption of valuable resistant material as far as possible, reach and make the minimized purpose of production cost.
The Korrosionsmedium kind is a lot, and every kind of medium all has its most suitable resistant material, according to the characteristic of medium, selects suitable resistant material, is a personalized very strong job.The world does not also have the resistant material of " omnipotent ".For the convenience on narrating, below we with the representative of titanium material as resistant material.Engineering practice proves that titanium is a kind of desirable resistant material, be acceptable a kind of precious metal on the price, and the specification that can supply on the market is more complete.
Heat exchanger of the present invention is the import and export by two fluids, titanium system heat exchange core assembly, carbon steel system shell and structural member assembly are formed, it is characterized in that: between titanium system heat exchange core assembly and carbon steel system cage assembly, need not weld and guarantee sealing between two fluids with dismountable static seal, the heat exchange core assembly can be extracted out from cage assembly, it has heat transfer, corrosion-resistant and intensity function, and shell and other structural member assembly, then make by low-cost carbon steel, when the fluid with housing contacts also has corrosivity, because no heat transfer task, so it is anticorrosion to adopt simple and cheap coating.Other technical measures that realize above-mentioned purpose are: with the rolling reinforcement of heat transfer substrate, to improve its stability, reduce its thickness; Adopt fin, expand the secondary heat exchange face as far as possible, not only can reduce the consumption of heat transfer substrate titanium, can increase the stability of substrate simultaneously again.
Be example with a R22 seawater condensate cooler, a natural gas brine cooler and an acetic acid brine cooler below, specify and how to implement said method (technical measures), the former represents miniaturization device, and the latter two then represent large-scale process unit.
The present invention is further illustrated below in conjunction with accompanying drawing.
Fig. 1 is a R22 seawater condensate cooler normal cross-section structural representation, and Fig. 2 is Figure 1B-B cutaway view, and Fig. 3 is Fig. 1 A-A cut-away view, Fig. 4 be the D of Fig. 1 to view, Fig. 5 is that the C of Fig. 1 is to view.Fig. 6 is a natural gas brine cooler normal cross-section structural representation, Fig. 7 is Fig. 6 B-B cutaway view, Fig. 8 is Fig. 6 A-A cut-away view, Fig. 9 is that the C of Fig. 6 is to view, Figure 10 is that the D of Fig. 6 is to view, Figure 11 is an acetic acid brine cooler normal cross-section structural representation, and Figure 12 is Figure 11 B-B cutaway view, and Figure 13 is Figure 11 A-A cut-away view, Figure 14 is that the C of Figure 11 is to view, Figure 15 be the D of Figure 11 to view, Figure 16 is the rolling heat transfer substrate expanded view that reinforcement is arranged, and has showed the layout schematic diagram of fin and spacing column among the figure, Figure 17 is the B-B cutaway view of Figure 16, Figure 18 be the A of Figure 16 to view (amplification), Figure 19 is the E portion enlarged drawing of Fig. 6, Figure 20 is that the B of Figure 19 is to view.
Among the figure: 1. seawater (in-core stream) outlet, 2. gland, 3. gland bolt, 4. nut, 5. packing ring, 6. stuffing-box, 7. filler, 8. fixing end cap, 9. housing, 10. seawater flow chamber, 11. strip of paper used for sealings, 12. heat transfer substrate, 13. central tubes, 14. heat exchange core assemblies, 15. spacing devices, wherein: 15-
1Be spacing column, 15-
2Be the spacing bar, 16. fins, wherein 16-
1For not with the fin (available aluminium manufacturing) of contact with sea water, 16-
2For with the fin of contact with sea water (needing to make) with the titanium material, 17. fluorine vapour (core outflow) import, the outlet of 18. fluorine liquid, 19. shell flanges, 20. shell flange end cap, 21. the seawater inlet tube, 22. shell flange packing rings, 23. shell flange bolts, 24. shell flange nut, 25. the shell flange packing ring, 26. support members, 27. supports, 28. spiral marking connection titanium system lap joint flange, 29. natural gas (core outflow) inlet tube, 30. gas outlet pipes, 31. solidify filler, 32. rolling reinforcement, 33. acetic acid (core outflow) inlet tube, 34. acetic acid outlets, b
1. the technology runner is wide, b
2The seawater runner is wide, δ. the housing wall thickness.
Usually, the pressure of seawater runner is lower than the technology runner, and seawater is corrosive, and recommends the sea Water is chosen in the internal flow of heat exchange core, and we are referred to as another stream corresponding to ' in-core stream ' Body then is referred to as ' core outflow '. As heat exchanger, recommendation will have corrosivity and pressure is low Fluid is as ' in-core stream '.
The specific embodiment
Fig. 1 is a R22 seawater condensate cooler normal cross-section structural representation, heat exchange core assembly 14 among the figure is to import and export pipe 21,1, seawater flow chamber 10 by seawater, heat transfer substrate 12, central tube 13, strip of paper used for sealing 11, spacing device 15, fin 16 is rolled into an integral body, then be welded, the flow-passing surface of all and contact with sea water all is the titanium material, and the fin that contacts with R22 can be used aluminium.The cage assembly of pressure-bearing is by housing 9, and fixedly end cap 8, shell flange 19, and shell flange end cap 20 is formed, and all makes with carbon steel.Heat exchange core assembly 14 is in wherein with support member 26 and locating part (not shown) frame.For guaranteeing sealing, seawater is imported and exported the pipe place, adopts stuffing-box 6, gland 2, and filler 7 relies on the packing seal that compresses of bolt 3, nut 4.Fixedly end cap 8 and housing 9 seam mutually, shell flange end cap 20 seals by flange packing ring 22, bolt, nut, packing ring 23,24,26 with shell flange 19.Fluorine vapor inlet pipe 17, fluorine liquid outlet 18 and leakage fluid dram, gas vent and fusible plug then adopt tooth seat (not shown) and housing seal.Walk odd number trace when setting seawater, when fluorine 22 was walked the even number road, the odd number trace in the seawater flow chamber 10 was an opening, and the even number road then is seam.End face beyond the seawater flow chamber 10 is just in time opposite with it, and odd number trace is seam, and the even number road then is an opening.(referring to Fig. 2 and Fig. 3).Sea intake and the outlet of fluorine liquid all are located at the bottom of condenser, can guarantee the degree of supercooling that fluorine liquid is necessary.Condenser can level or vertical the installation, recommends to adopt vertical the installation.
Liquid-gas the heat transfer process of embodiment 2 one fluid tool corrosivity, no phase transformation
Fig. 6 is a natural gas brine cooler normal cross-section structural representation, heat exchange core assembly 14 also is to import and export pipe 21,1 by seawater, seawater flow chamber 10, heat transfer substrate 12, central tube 13, strip of paper used for sealing 11, spacing device 15, fin 16 are rolled into an integral body, then are welded, the flow-passing surface of all and contact with sea water all is the titanium material, and the fin that contacts with natural gas can be used aluminium.The cage assembly of pressure-bearing is by housing 9, and fixedly end cap 8, shell flange 19, and shell flange end cap 20 is formed, and all makes with carbon steel.Heat exchange core assembly 14 is in wherein with support member 26 and locating part (not shown) frame.The seawater import and export pipe of considering large-scale process unit may be thicker, for guaranteeing sealing, seawater is imported and exported the side that pipe 21 and 1 all is arranged on shell flange end cap 20, recommend to adopt the titanium system lap joint flange 28 of spiral marking connection to substitute stuffing-box, 30 two ends that are separately positioned on cooler of the inlet tube 29 of natural gas and outlet.Here natural gas is cooled off by the seawater adverse current.
3 liang of fluids of embodiment are all had a liquid-liquid heat transfer process of corrosivity, no phase transformation
Figure 11 is an acetic acid brine cooler normal cross-section structural representation, heat exchange core assembly 14 also is to import and export pipe 21,1 by seawater, seawater flow chamber 10, heat transfer substrate 12, central tube 13, strip of paper used for sealing 11, spacing device 15, fin 16 are rolled into an integral body, then are welded, the flow-passing surface of all and contact with sea water all is the titanium material, and the fin that contacts with acetic acid will be made with the material of anti-acetic acid corrosion.The cage assembly of pressure-bearing is by housing 9, and acetic acid is imported and exported pipe 33,34, and fixedly end cap 8, shell flange 19, shell flange end cap 20 is formed, and all makes the task because they do not conduct heat with carbon steel, and simple in structure, flow-passing surface is outer naked, can adopt corrosion-inhibiting coating to come anticorrosion easily.For example the brushing anticorrosive paint, mould again, method such as line with rubber, enamel and Ni-P plating is anticorrosion.They all are mature technologies, need not to give unnecessary details.Heat exchange core assembly 14 is in wherein with support member 26 and locating part (not shown) frame.The seawater import and export pipe of considering large-scale process unit may be thicker, for guaranteeing sealing, seawater is imported and exported the side that pipe 21 and 1 all is arranged on shell flange end cap 20, recommend to adopt the titanium system lap joint flange 28 of spiral marking connection to substitute stuffing-box, 34 two ends that are separately positioned on cooler of the inlet tube 33 of acetic acid and outlet.Acetic acid is cooled off by the seawater adverse current.
Above-mentioned structural shape can be avoided titanium material and the carbon steel shortcoming of weldering property difference mutually, realized conducting heat and corrosion resistant task leans on the titanium material to take on, and the purpose that the pressurized task is taken on by carbon steel.
Usually, heat exchanger is when operation, and the pressure of seawater side is lower than the pressure of process flow (for example natural gas, fluorine 22), and promptly heat exchange core assembly 14 is containers that are subjected to external pressure, and therefore, we must pay close attention to the stability of heat transfer substrate 12.
Reducing titanium material consumption as much as possible, reduce manufacturing cost, is the economic goal that the present invention pursues.Need: 1. the area that reduces heat transfer substrate for this reason; 2. under the prerequisite that guarantees heat transfer substrate stability, reduce its thickness.For realizing above-mentioned target, the technical measures that the present invention adopts have following some: 1. keep the heat exchange mode of the pure adverse current of type IV spiral heat exchanger of applicant's invention, because it has very high overall coefficient of heat transfer K value; During operation, increase the consumption of refrigerated sea water, the outlet temperature of reduction refrigerated sea water, to increase the average logarithm temperature difference in the diabatic process; 2. in two runners fin is set, has both increased heat exchange area, help further improving the k value again, the fin of seawater side has also improved the stability of heat transfer substrate simultaneously; 3. with the rolling reinforcement of heat transfer substrate, can significantly improve the stability of heat transfer substrate.They have obtained embodiment in Figure 16-Figure 20.
Figure 16 is the rolling heat transfer substrate expanded view that reinforcement is arranged, and it represents natural gas runner, and runner is wide to be b
1, fin 16 is along the length direction spread of heat transfer substrate, and rolling in the both sides of fin width has reinforcement 32, and its effect has 2:a. to improve the stability of heat transfer substrate 12; B. make fin spacing, prevent from when rolling, to be subjected to displacement.Because there is the peripheral flow of segmentation in fluid when operation, so fin 16 is not full shop, leave the passage of making peripheral flow for fluid between two row fins, be provided with spacing column 15-therein
1The seawater runner is the wide b of runner similarly
2Less (general 2-4mm) is so adopt the spacing bar 15-of segmentation
2For the wing formula is compressed by the heat transfer substrate on both sides, to reduce thermal contact resistance, the diameter of the height of spacing column and spacing bar should have minus deviation than the fin height of correspondence.Better is, lays brazing flux and solder before rolling on fin and heat transfer substrate contact-making surface, after spooling, delivers to the soldering furnace brazing.Can obtain the high-quality heat exchanger that heat transfer efficiency is better, bearing capacity is higher.Just its investment in fixed assets is bigger.In the annular gap of 9 of heat exchange core assembly 14 and housings, in case of necessity, available charges 31 fillings, they can be insulating, porous material, cement or low-melting-point metal (as tin or lead).
Claims (8)
1. corrosion-resistant double axial flow spiral heat exchanger that the heat exchange core can be taken out outward, import and export, corrosion resistant metal system heat exchange core assembly, carbon steel system shell and structural member assembly by two fluids are formed, it is characterized in that: do not adopt welding between corrosion resistant metal system heat exchange core assembly and carbon steel system cage assembly and adopt dismountable static seal to guarantee sealing between two fluids, the heat exchange core assembly can be extracted out from cage assembly, the heat exchange core assembly is finished heat transfer, corrosion-resistant and intensity task, and cage assembly is then mainly finished the pressurized task.
2. corrosion-resistant double axial flow spiral heat exchanger that a kind of heat exchange core as claimed in claim 1 can be taken out outward, the fluid that it is characterized in that being corrosive, pressure is low are suitable for and are set at ' in-core stream ', and the fluid that pressure is high is suitable for and is set at ' core outflow '.
3. the corrosion-resistant double axial flow spiral heat exchanger that can take out outward as claim 1 and 2 described a kind of heat exchange cores is characterized in that can adopting corrosion-resistant finishes to prevent that the flow-passing surface of cage assembly is corroded when ' core outflow ' when also having corrosivity.
4. corrosion-resistant double axial flow spiral heat exchanger that a kind of heat exchange core as claimed in claim 1 can be taken out outward, it is characterized in that in a runner or two runners fin being set, fin is not full shop, between two row fins, leave the passage of fluid, be provided with the spacing device in the passage.
5. the corrosion-resistant double axial flow spiral heat exchanger that can take out outward as claim 1 and 4 described a kind of heat exchange cores is characterized in that fin is pressed between two heat transfer substrates, but also soldering between two heat transfer plates.
6. the corrosion-resistant double axial flow spiral heat exchanger that can take out outward as claim 1 and 4 described a kind of heat exchange cores is characterized in that the both sides in fin width, and rolling have a reinforcement.
7. the corrosion-resistant double axial flow spiral heat exchanger that can take out outward as claim 1 and 4 described a kind of heat exchange cores, the external diameter that it is characterized in that the height of spacing column or spacing bar has minus deviation to the height of fin.
8. corrosion-resistant double axial flow spiral heat exchanger that a kind of heat exchange core as claimed in claim 1 can be taken out outward, it is characterized in that in the annular gap between heat exchange core assembly and housing, in case of necessity, available charges filling, they can be insulating, porous material, cement or low-melting-point metal (as tin or lead).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100415212A CN100485301C (en) | 2005-08-18 | 2005-08-18 | Anti-corrosive double axial flow spiral-plate heat exchange with outwards drawn heat exchange core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100415212A CN100485301C (en) | 2005-08-18 | 2005-08-18 | Anti-corrosive double axial flow spiral-plate heat exchange with outwards drawn heat exchange core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1731063A true CN1731063A (en) | 2006-02-08 |
| CN100485301C CN100485301C (en) | 2009-05-06 |
Family
ID=35963460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100415212A Expired - Fee Related CN100485301C (en) | 2005-08-18 | 2005-08-18 | Anti-corrosive double axial flow spiral-plate heat exchange with outwards drawn heat exchange core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100485301C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102384322A (en) * | 2011-11-24 | 2012-03-21 | 无锡迈鑫科技实业有限公司 | Flange structure of heat exchanger |
| CN103206812A (en) * | 2013-04-02 | 2013-07-17 | 黑龙江省金永科技开发有限公司 | Anticorrosion heat exchanger |
| CN103256585A (en) * | 2013-05-10 | 2013-08-21 | 淮安华电环保机械制造有限公司 | Novel waste heat boiler |
| CN103398606A (en) * | 2013-08-23 | 2013-11-20 | 夏品荷 | Single-channel spiral plate type heat exchanging member and manufacturing method thereof |
| CN108759527A (en) * | 2018-06-26 | 2018-11-06 | 浙江金龙自控设备有限公司 | Demountable spiral-plate heat exchanger |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2313650A1 (en) * | 1975-06-05 | 1976-12-31 | Bertin & Cie | COMPACT HEAT EXCHANGER FOR FLUIDS |
| CN2177214Y (en) * | 1993-04-22 | 1994-09-14 | 王平 | Detachable enamelled tube shell heat exchanger |
| CN2191404Y (en) * | 1994-04-01 | 1995-03-08 | 夏有年 | Shell-and-tube heat exchanger |
| CN2205535Y (en) * | 1994-12-06 | 1995-08-16 | 路长水 | Multi-stage open type screw plate heat exchanger |
| CN2262228Y (en) * | 1996-03-15 | 1997-09-10 | 龙学义 | Concentrate sulfuric acid heat exchanger for anode protection screw plate |
| CN2457548Y (en) * | 2000-12-14 | 2001-10-31 | 南京宝色钛业有限公司 | Titanium material four-way screw plate type heat exchanger |
| CN100447517C (en) * | 2003-06-16 | 2008-12-31 | 吴植仁 | Folding pressure-resistant multipass biaxial flow screw plate heat exchanger |
-
2005
- 2005-08-18 CN CNB2005100415212A patent/CN100485301C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102384322A (en) * | 2011-11-24 | 2012-03-21 | 无锡迈鑫科技实业有限公司 | Flange structure of heat exchanger |
| CN103206812A (en) * | 2013-04-02 | 2013-07-17 | 黑龙江省金永科技开发有限公司 | Anticorrosion heat exchanger |
| CN103206812B (en) * | 2013-04-02 | 2015-07-08 | 黑龙江省金永科技开发有限公司 | Anticorrosion heat exchanger |
| CN103256585A (en) * | 2013-05-10 | 2013-08-21 | 淮安华电环保机械制造有限公司 | Novel waste heat boiler |
| CN103398606A (en) * | 2013-08-23 | 2013-11-20 | 夏品荷 | Single-channel spiral plate type heat exchanging member and manufacturing method thereof |
| CN108759527A (en) * | 2018-06-26 | 2018-11-06 | 浙江金龙自控设备有限公司 | Demountable spiral-plate heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100485301C (en) | 2009-05-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100485301C (en) | Anti-corrosive double axial flow spiral-plate heat exchange with outwards drawn heat exchange core | |
| CN203454867U (en) | Highly-corrosive resistant shell and tube heat exchanger | |
| CN2869738Y (en) | Aluminium inner-finned-tube heat exchanger | |
| CN104191183B (en) | Production method of metal composite pipe | |
| CN2811915Y (en) | Heat exchanger | |
| CN2901221Y (en) | Shell-and-tube heat exchanger for corrosive medium | |
| CN215447508U (en) | Single-tube-type heat exchanger with built-in expansion joint | |
| CN201152708Y (en) | Corrosion and high pressure resistant tube-shell type heat exchanger | |
| CN2586126Y (en) | Corrosion resistance air cooler | |
| CN201066019Y (en) | High polymer composite corrugated expansion joint | |
| CN2188743Y (en) | Shell-and-tube heat exchanger | |
| CN2177214Y (en) | Detachable enamelled tube shell heat exchanger | |
| CN2578765Y (en) | High-perfomance bellows cooler | |
| CN201945241U (en) | Sealing device for air cooler pipe box | |
| CN2578768Y (en) | High flux heat exchanger | |
| CN2280191Y (en) | Corrosion-resistant joint for pipe with double layer of metals | |
| CN2750277Y (en) | Heat exchanger with inhomogeneous heat exchange tubes | |
| Pelliccione et al. | Dealuminification of heat exchanger tubes | |
| CN218480946U (en) | Pressure-bearing type unit-made anti-corrosion heat exchanger | |
| CN211854974U (en) | Fixed tube plate heat exchanger | |
| CN1225298C (en) | Directly cooling solvent recovering method and system | |
| CN216668379U (en) | Silicon carbide heat exchanger | |
| CN2572327Y (en) | Carbon steel, aluminium and polybdenum coadmixture heat-exchanger | |
| CN2588315Y (en) | Enamel glass raw-pipe type heat-exchanger | |
| CN203203430U (en) | Film-type evaporator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090506 Termination date: 20110818 |