CN108507401A - Pipe heat exchanger and its application in biomedical product production technology - Google Patents
Pipe heat exchanger and its application in biomedical product production technology Download PDFInfo
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- CN108507401A CN108507401A CN201810199523.1A CN201810199523A CN108507401A CN 108507401 A CN108507401 A CN 108507401A CN 201810199523 A CN201810199523 A CN 201810199523A CN 108507401 A CN108507401 A CN 108507401A
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- Prior art keywords
- tube
- heat exchanger
- sheet
- pipe heat
- pipe
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
- F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
- F28F2265/16—Safety or protection arrangements; Arrangements for preventing malfunction for preventing leakage
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a kind of pipe heat exchanger and its applications, the heat exchanger includes shell side and tube side, heat exchanger tube both ends are Peng great Duan in evaporator, and between the Peng great Duan and tube sheet it was tight fit, the Peng great Duan is extended on the outside of tube sheet and exposed length is not less than tube plate thickness, the tube sheet is at least formed by two superimposed, and is equipped with effusion collection groove, the external monitor of effusion collection groove in superposition interface；In the tube end mounting flange lid, the blind flange and Tube-sheet Welding are fixed, and sealing ring is provided between the blind flange axis hole and heat exchanger tube, and it is inserted into expansion sleeve in the inside of the Peng great Duan, it is welded between the blind flange at the expansion sleeve flange.It is to be welded to connect between blind flange and tube sheet, it is not in leakage, simultaneously, between heat exchanger tube and blind flange and tube sheet, level-one tension fitted seal and sealing ring sealing are existed simultaneously, it, can be to avoid generation electrochemical effect without direct pad between heat exchanger tube and tube sheet, it is sealed, it is ensured that leakage does not occur between tube side and shell side.
Description
Technical field
The invention is related to pipe heat exchanger technical field, is used especially a kind of industry suitable for biomedical product
Safe heat exchanger.
Background technology
It is currently used for widely used pipe heat exchanger in biomedical product production technology, as shown in Figure 1, when in use
Heat exchanger is not carried out full emptying design, and the roughness height of side is contacted with product, is unable to reach medical and health and food is defended
Raw technological requirement be easy to cause product (medium I) and cooling medium (medium II) bidirectional crossed pollution, be easy to cause leakage,
It makes troubles to production.The connection sealing of the internal tube plate and heat exchanger tube of double tube plate heat exchanger is to use strength and buckling, in heat exchanger tube
When diameter is smaller, it is difficult to carry out expanded joint.
At present in the especially medical field of fine chemical of industrial circle, generally believes in pipe heat exchanger and exchange heat in industry
The connection of pipe and tube sheet must be connected by the way of expanded joint or/and welding, only in this way just can guarantee the sealing effect of product,
Prevent leakage phenomenon.It is also to record in this way in various textbooks and paper.Such as：The second phase in 2005《Chemical industry is set
Standby and pipeline》In deliver《The discussion of double tube plate heat exchanger lower perforated plate and tube bank connection method》It proves in industrial application
In, the connection type of exchanger tubes and tubesheets is all expanded joint and welding at present, with reference to figure 2.
The connection sealing means of heat exchanger tube and outer tube plate are that strength and buckling or swollen be welded with of patch connect or weld, in heat exchanger tube diameter
In the case of smaller, there are many weld defect.Traditional welding, expanded joint mode, if there is leakage phenomenon, light then heat exchanger report
Useless, heavy then cause serious medicine quality accident, production efficiency is very low, in separate unit production.
There is applicant to be attached heat exchanger tube and tube sheet using non-solder mode thus, Patent No.
2004200688742《Dismountable double tube plate shell-and-tube heat exchanger》, which develops for teaching purpose, and teaching is drilled
Show that apparatus and commercial Application have prodigious difference, is easy to happen leakage at sealing cooperation, that is to say, that in patent document
Structure design cannot be satisfied at all technical grade production needs.
Applicant is by the way that the study found that in conventional pipe heat exchanger, the position leaked occurs mainly in heat exchange
Pipe and tube sheet contact site, further study show that, heat exchanger tube is usually copper pipe or stainless steel tube, in order to increase heat exchange effect
Stainless steel tube or copper pipe are usually improved total heat transfer coefficient, that is to say, that from design principle by fruit by reducing wall thickness
For, the tube wall of heat exchanger tube gets over Bao Yuehao, currently, can be inquired according to known technology and handbook, heat exchanger tube is used not
Rust steel steel pipe is used for the thin-wall pipes of 0.3mm~0.8mm, and the technology that copper pipe tube wall has been realized in 0.8mm~1mm is prominent
It is broken, that is to say, that can effectively improve the overall heat exchange performance of heat exchanger by using thin-wall tube.
Tube sheet is the plank for fixing heat exchanger tube, is usually located at the both ends of shell, according to the material selection of heat exchanger tube, is led to
The material of normal tube sheet is identical as the material of heat exchanger tube, to ensure that overall stability (avoids out after heat exchanger tube and Tube-sheet Welding
Phenomena such as existing electrochemical corrosion).
But welding point position herein is connect different from common copper-brazing or stainless steel-is stainless steel welded, has
The welder of experience knows that welding node position herein is easiest to leak, and traditional analysis result is：Pad
Other than poor by the tube side of heat exchanger and shell side pressure, also tube plate deformation (expanding with heat and contract with cold), heat exchanger tube deform (expanding with heat and contract with cold),
Additionally, due to having stress concentration inside fillet-welded joint itself, that is, there is welded stress.
It is applicant's understanding that having gone out except above-mentioned reason, there are one important reasons by long-standing neglect：That is, tube wall
The difference in thickness of wall thickness and tube sheet is big.Reason is that the tube wall of usual heat exchanger tube itself is very thin, i.e., after tube wall and tube sheet after it
Bigger than very, during the welding process, be easy to causeing heat exchanger tube perforation, (overvoltage test can detected leakage and carry out corresponding
Remedial measure), pad tube wall it is thinning (being not easy to detect), during long service, born tube side and shell side liter unload
Pressure oscillations and the temperature changes such as pressure weld the stomata, slag inclusion, micro-crack of generation under similar fatigue load effect, can be rapid
Extension, cause to leak, especially when throat depth is thin, ability to bear is more insufficient, causes to perforate, therefore, it is necessary to pair with welding
Point position, protected especially for the heat exchanger tube at pad position, can just effectively reduce heat exchanger be on active service during
Risk of leakage.
The technology of the present invention leakage problem caused by for solving above-mentioned welding reduces the risk of leakage of heat exchanger
To acceptable intensity, while the sealing ring leakage problem occurred in welding assembling process is avoided, specific implementation will
Detailed introduction is given in subsequent embodiment part.
Invention content
In order to solve the deficiencies in the prior art, the present invention provides a kind of pipe heat exchanger and its is produced in biomedical product
Application in technique is solved in existing heat exchanger by sealing the dual mode for assembling and welding between exchanger tubes and tubesheets
The problem of being easy to happen dielectric leakage, cross contamination.
The technical solution adopted by the present invention to solve the technical problems is：
Heat exchanger, including shell side and tube side, it is working medium I to be wherein passed through in shell side, and it is medium II to be passed through in tube side,
It is characterized in that,
Heat exchanger tube both ends are Peng great Duan in the evaporator, and are tight fit between the Peng great Duan and tube sheet, described
Peng great Duan is extended on the outside of tube sheet and exposed length is not less than tube plate thickness, and the tube sheet is at least formed by two superimposed, and
It is superimposed interface and is equipped with effusion collection groove, the external monitor of effusion collection groove；
In the tube end mounting flange lid, the blind flange and Tube-sheet Welding are fixed, and in the blind flange axis
Be provided with sealing ring between hole and heat exchanger tube, and expansion sleeve be inserted into the inside of the Peng great Duan, at the expansion sleeve flange with
It is welded between the blind flange.
Further, the heat exchanger tube is stainless steel tube or copper pipe of the thickness at 0.2 millimeter~0.8 millimeter.
Further, heat exchange the ratio between the thickness of pipe wall and tube plate thickness are 1:60~1:30.
Further, the assembly between the exchanger tubes and tubesheets uses cold and hot assembling method.
Further, the assembly between the heat exchanger tube and expansion sleeve uses cold and hot assembling method.
Further, the inner wall of the shell side and tube side is equipped with plastic lining layer, polytetrafluorethylecoatings coatings or enamel layer.
Further, molten metal is equipped between the end and stainless steel sleeve of the heat exchanger tube.
Further, the centre of the heat exchanger tube is helical form.
Further, the heat exchanger is by biomedical product production line.
The beneficial effects of the invention are as follows：
1, readily replaceable, in the present invention, without direct welding node between heat exchanger tube and tube sheet, but pad is shifted
To blind flange and tube sheet peripheral region, when needing replacing heat exchanger tube, it is thus only necessary to by the bridgeware and tube sheet of fixed heat exchanger tube
Between solder joint polishing eliminate, then, heat exchanger tube is taken out, after taking-up, the heat exchanger tube more renewed, bridgeware can weigh
It is multiple to utilize.
2, be not in leakage between blind flange and tube sheet to be welded to connect, meanwhile, heat exchanger tube and blind flange and tube sheet it
Between exist simultaneously level-one tension fitted seal and sealing ring sealing, without direct pad between heat exchanger tube and tube sheet, can keep away
Exempt to generate electrochemical effect, be sealed, it is ensured that leakage does not occur between tube side and shell side.
3, it is provided with leak detection point, even if leakage, which occurs, to be found in time.
4, tube end is subjected to tube expansion using swelling pipe, it, can be strong to carrying out the enhancing of part at tube expansion after processing
Degree.
5, welding requirements is reduced, the welding quality requirement between traditional exchanger tubes and tubesheets is high, by that will weld
Point is transferred between blind flange and tube sheet, reduces the quality requirement of welding, that is, common welding can meet technology requirement.
6, pass through the use of expansion sleeve so that the pipe thickness of heat exchanger tube is obtained further reducing and is possibly realized, theoretical
On, the pipe thickness of stainless steel can be reduced to 0.2 millimeter or so in the present invention, also just say, 0.2 millimeter of stainless steel tube also can
It is smoothly used in this heat exchanger.
In conclusion the heat exchanger avoids product and the bidirectional crossed pollution of cooling medium；Tube side, shell side medium are not easy
Leakage, micro leakage can also be monitored to；Production, assembling, maintenance are easier.
Description of the drawings
Fig. 1 is the internal structure schematic diagram of original condenser.
Fig. 2 is the welding connection node figure between heat exchanger tube and tube sheet in original condenser.
Fig. 3 is the welding connection node figure between heat exchanger tube and tube sheet in embodiment one.
Fig. 4 is the welding connection node figure between heat exchanger tube and tube sheet in embodiment two.
Fig. 5 is the welding connection node figure between heat exchanger tube and tube sheet in embodiment three.
Fig. 6 is the stereogram (part) of heat exchanger tube in example IV.
In figure：100 shell sides, 110 box hats, 111 working medium, II import, the outlet of 112 working medium II, 113 thermocouples,
200 tube sides, 210 working medium, I import, the outlet of 220 working medium I,
300 heat exchanger tubes, 310 Peng's big ends, 320 helix tubes, 330 straight tubes,
400 tube sheets, 410 effusion collection grooves I, 420 effusion collection grooves II
500 blind flanges, 511 flange portions, 512 cylindrical portions, 510 sealing rings,
600 stainless steel sleeves.
Specific implementation mode
The design principle and operational effect of the present invention are explained in detail below by the present embodiment：
With reference to figure 1, in this heat exchanger, including shell side 100 and tube side 200, the working medium being wherein passed through in shell side are refrigeration
The medium that agent is either passed through in steam tube side is biological agent or pharmaceutical preparation, wherein is set on the box hat 110 of shell side 100
It is equipped with II import 111 of working medium, the outlet of working medium II 112, safety relief valve and thermocouple 113, wherein II import 111 of working medium is located at
Top, the outlet of working medium II 112 are located at lower part, can also increase spoiler (being to show in Fig. 1) in shell side so that working medium II is certainly
Path extends during upper and lower flowing, increases transfer path.
In tube side 200, lower part is I import 210 of working medium, and top is that working medium I exports 220.
Plastic lining layer or polytetrafluorethylecoatings coatings can be sprayed on the inner wall of shell side 100 and tube side 200 as needed, or
The sintering enamelled layer of person enhances resistance to corrosion.
In traditional heat exchanger, being welded to connect with reference to figure 2 between heat exchanger tube 300 and tube sheet 400, that is, in heat exchanger tube
Both ends are welded to connect by welding with tube sheet or expanded joint is connect.
The present invention's thes improvement is that：
With reference to figure 3, by taking the heat exchanger tube 300 of stainless steel as an example (hereinafter referred to as stainless steel tube), the stainless steel tube wall thickness
It is 0.5 millimeter, is in light wall pipe scope, tube sheet uses 30 millimeters of stainless steel plates, wherein heat exchange the ratio between thickness of pipe wall and tube sheet wall thickness
It is 1:60, when using conventional bonding technique connection, heat exchanger tube is susceptible to solder joint perforation, deformation, thinning problem.
Original single layer tube sheet is changed to double tube sheet by tube sheet 400, wherein the tube sheet II of the tube sheet I and outside of inside
Between be provided with effusion collection groove I 410, which forms a cavity between two tube sheets, and cavity is connected by interface
Monitor is connect, monitoring of leakage point, the leakage situation for monitoring working medium II are formed.
Two tube sheets are connected as one by way of high-strength bolt with shell side box hat, are uniformly set on tube sheet 400
It is equipped with：Circular hole, the existing effect of the circular hole are to provide installation perforation for the installation of heat exchanger tube.
Heat exchanger tube 300：Its length is more slightly longer than traditional length, that is, after heat exchanger tube penetrates into the perforation at both ends, heat exchanger tube
Expose 3-5 centimetres of length respectively in 300 both ends, that is to say, that reserve enough fixation ends.To the end of stainless steel tube 300
It carries out swollen hole, behind swollen hole, the Peng great Duan 310 of 2 times of tube plate thicknesses is slightly in the both ends formation length of stainless steel tube.
The packaging technology of heat exchanger tube and tube sheet is as follows：
First, the assembly between heat exchanger tube 300 and twice tube sheet uses cold and hot assembling method, that is, tube sheet is heated to 100 and is taken the photograph
Between -150 degrees Celsius of family name's degree, while tube end is refrigerated to subzero 20 degrees centigrade, then will exchange heat rapidly pipe end
Portion is inserted into corresponding circular hole, and the length in reserve of heat exchanger tube is positioned by locating piece, wait change with after tube sheet natural cooling,
Mistake tight fit between the two is completed, machinery is formed and crosses tight fit, there is certain anti-permeability performance.
Then, prepare blind flange 500, wherein blind flange 500 is machined into type, including flange using stainless steel bar
Portion 511 and cylindrical portion 512, in cylindrical portion, cylindrical portion 512 is nested on the outside of tube sheet in tube end, and concentric with circular hole
It is corresponding, ensure to be arranged concentrically between blind flange and heat exchanger tube, and flange portion 511 and tube sheet 400 are welded, with reference to figure 3, on
The thickness for the flange portion stated is far longer than the thickness of stainless steel tube, and, the thickness of the thickness of flange portion closer to tube sheet, that is, 30
Millimeter or so, the welding of blind flange and tube sheet 400 being welded as between thick stainless steel, circular hole of the welding position on tube sheet
Suitably, welding stress is reduced to zero, after welding to the adverse effect of circular hole, even if there is small weld defect, will not caused
The perforation of blind flange or tube sheet, it is only necessary to which the continuity for ensureing weld carries out stainless steel tube due to not direct
Welding can be completed without special welding skill so reducing welding quality.By by stainless steel tube 300 and tube sheet
Welding is transformed to the welding of tube sheet 400 and blind flange, and stainless steel tube solder joint position is easy during avoiding welding and later stage operation
The problem of leaking.
For the sealing performance for increasing between heat exchanger tube and blind flange, two seals are set in the interior axis hole of blind flange
510, play the role of mechanical seal.
The stainless steel sleeve 600 of one subzero tens of degree is tucked into bulb 310 by the last one step, and stainless steel sleeve is
Sleeve identical with stainless steel tube specification, after filling in, fastens fastening nut, and after fastening, stainless steel sleeve 600 heats up, support
It rises, you can the Peng great Duan that heat pipe is exchanged from inside carries out swelling, and stainless steel sleeve and heat exchange are realized by the self-expanding of stainless steel sleeve
Swelling between pipe bulb forms expansion sleeve.And contact surface between the two is long so that the anti-loading ability at this obtains
Reinforce to effective.And during capable of doing guarantee long service, bulb position herein does not deform.And in stainless steel sleeve 600
End set flange, flange and blind flange end face are welded by the form of welding, formed welded seal.
Embodiment two
It is small by reserving one between the end and stainless steel sleeve of heat exchanger tube on the basis of embodiment one with reference to figure 4
Space forms metal derby 700, such as the copper alloy of low melting point in the space by way of melting, realizes melting filling.
Embodiment three
In Figure 5, it is three overlaying structures by tubesheet calculation, that is, set between the tube sheet I and the tube sheet II of centre of inside
It is equipped with effusion collection groove I 410, which forms a cavity between two tube sheets, and cavity is connected by interface and monitored
Instrument forms monitoring of leakage point, the leakage situation for monitoring working medium II.
It is provided with effusion collection groove II 420 between the tube sheet III and the tube sheet II of centre in outside, which exists
A cavity is formed between two tube sheets, cavity connects monitor by interface, monitoring of leakage point is formed, for monitoring working medium I
Leakage situation.
Example IV
In above three embodiments, above-mentioned stainless steel tube is straight tube, that is to say, that is straight up and down pipeline.This
In embodiment, in order to increase heat transfer effect, by the intermediate position spiral winding of heat exchanger tube 300, formed middle part be helix tube 320,
Both ends are the pattern of straight tube 330, and with reference to figure 6, wherein straight-tube portion may be and be formed behind swollen hole to expand end.During operation,
Heat exchanger tube expands with heat and contract with cold under effect, by the self-deformation of helix tube, can be produced to avoid between heat exchanger tube and taper seal
The stress of raw opposite sliding, ensures that sealing is in optimum state.
Pass through above-mentioned implementation, it is ensured that will not there is a situation where cross contaminations between working medium I and working medium II, that is, by two
Cross contamination possibility between person is down to close to zero.
In application, this heat exchanger can be used with single-stage in biomedical product production technology, multistage can also use, energy
Enough meet the needs of biomedical product production.
The above-described embodiments are merely illustrative of preferred embodiments of the present invention, not to the model of the present invention
It encloses and is defined, under the premise of not departing from design spirit of the present invention, various changes of the relevant technical staff in the field to the present invention
Shape and improvement should all expand in the protection domain as determined by claims of the present invention.
Claims (9)
1. pipe heat exchanger, including shell side and tube side, it is working medium I to be wherein passed through in shell side, and it is medium II to be passed through in tube side,
It is characterized in that,
Heat exchanger tube both ends are Peng great Duan in the evaporator, and are tight fit between the Peng great Duan and tube sheet, and Peng is big
End extends on the outside of tube sheet and exposed length is not less than tube plate thickness, and the tube sheet is at least formed by two superimposed, and is being superimposed
Interface is equipped with effusion collection groove, the external monitor of effusion collection groove；
In the tube end mounting flange lid, the blind flange and Tube-sheet Welding are fixed, and in the blind flange axis hole and
Be provided with sealing ring between heat exchanger tube, and expansion sleeve be inserted into the inside of the Peng great Duan, at the expansion sleeve flange with it is described
It is welded between blind flange.
2. pipe heat exchanger according to claim 1, which is characterized in that the heat exchanger tube is thickness 0.2 millimeter~0.8
The stainless steel tube or copper pipe of millimeter.
3. pipe heat exchanger according to claim 1, which is characterized in that heat exchange the ratio between the thickness of pipe wall and tube plate thickness are
1:60~1:30.
4. pipe heat exchanger according to claim 1, which is characterized in that the assembly between the exchanger tubes and tubesheets uses
Cold and hot assembling method.
5. pipe heat exchanger according to claim 1, which is characterized in that the assembly between the heat exchanger tube and expansion sleeve is adopted
With cold and hot assembling method.
6. pipe heat exchanger according to claim 1, which is characterized in that the inner wall of the shell side and tube side is equipped with lining plastic
Layer, polytetrafluorethylecoatings coatings or enamel layer.
7. pipe heat exchanger according to claim 1, which is characterized in that between the end and stainless steel sleeve of the heat exchanger tube
Equipped with molten metal.
8. pipe heat exchanger according to claim 1, which is characterized in that the centre of the heat exchanger tube is helical form.
9. according to the pipe heat exchanger described in claim 1 to 8, which is characterized in that the pipe heat exchanger is applied to biology
In pharmaceutical preparation production line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810199523.1A CN108507401A (en) | 2018-03-12 | 2018-03-12 | Pipe heat exchanger and its application in biomedical product production technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810199523.1A CN108507401A (en) | 2018-03-12 | 2018-03-12 | Pipe heat exchanger and its application in biomedical product production technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108507401A true CN108507401A (en) | 2018-09-07 |
Family
ID=63377527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810199523.1A Withdrawn CN108507401A (en) | 2018-03-12 | 2018-03-12 | Pipe heat exchanger and its application in biomedical product production technology |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553533A (en) * | 2019-09-11 | 2019-12-10 | 上海蓝滨石化设备有限责任公司 | Connecting structure of porous flat tube and tube plate of aluminum air cooler |
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| CN105202963A (en) * | 2015-09-29 | 2015-12-30 | 茂名重力石化机械制造有限公司 | Non-welding forced sealing structure for heat exchange tube and tube plate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553533A (en) * | 2019-09-11 | 2019-12-10 | 上海蓝滨石化设备有限责任公司 | Connecting structure of porous flat tube and tube plate of aluminum air cooler |
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Application publication date: 20180907 |