CN109029021A - A kind of heat exchanger tube of heat exchanger and heat exchanger using the heat exchanger tube - Google Patents

A kind of heat exchanger tube of heat exchanger and heat exchanger using the heat exchanger tube Download PDF

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Publication number
CN109029021A
CN109029021A CN201810921516.8A CN201810921516A CN109029021A CN 109029021 A CN109029021 A CN 109029021A CN 201810921516 A CN201810921516 A CN 201810921516A CN 109029021 A CN109029021 A CN 109029021A
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CN
China
Prior art keywords
heat exchanger
tube
exchanger tube
straight pipe
heat
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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.)
Pending
Application number
CN201810921516.8A
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Chinese (zh)
Inventor
宋广懂
余华金
杨红义
申凤阳
张振兴
彭康玮
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China Institute of Atomic of Energy
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China Institute of Atomic of Energy
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Publication date
Application filed by China Institute of Atomic of Energy filed Critical China Institute of Atomic of Energy
Priority to CN201810921516.8A priority Critical patent/CN109029021A/en
Publication of CN109029021A publication Critical patent/CN109029021A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00Tubular elements; Assemblies of tubular elements
    • F28F1/10Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/34Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
    • F28F1/36Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically wound fins or wire spirals

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The disclosure belongs to reactor engineering field, the in particular to heat exchanger tube of a kind of heat exchanger and the heat exchanger using the heat exchanger tube.The heat exchanger tube uses spatially spiral structure;Heat exchanger tube includes: the first straight pipe, the first spatially spiral bend loss, intermediate straight pipe, second space spiral bending tube section, the second straight pipe;Wherein first straight pipe one end is fixedly connected on upper perforated plate;Wherein the first straight pipe, the first spatially spiral bend loss, intermediate straight pipe, second space spiral bending tube section, the second straight pipe are fixedly connected sequentially, and the second straight pipe is fixedly connected on lower perforated plate.To provide it is a kind of elimination heat exchanger due to thermal expansion difference cause thermal stress issues heat exchanger tube and using the heat exchanger tube heat exchanger.

Description

A kind of heat exchanger tube of heat exchanger and heat exchanger using the heat exchanger tube
Technical field
The disclosure belongs to reactor engineering field, the in particular to heat exchanger tube of a kind of heat exchanger and changing using the heat exchanger tube Hot device.
Background technique
Intermediate Heat Exchanger is the heat exchange equipment for connecting pool type natrium cold fast reactor main heat-transfer system primary Ioops and secondary circuit, arrangement In in heap container, the sodium cooling of secondary circuit main cooling system compact-sized for the ease of secondary circuit pipe arrangement and equipment itself Agent coaxial (center down-comer) in Intermediate Heat Exchanger introduces and export.Such structure type determines changing for Intermediate Heat Exchanger Heat pipe bundle uses arranged in concentric circles.
For nuclear power station large heat exchanger since heat-exchanging tube bundle is numerous, the temperature between the different components of heat transfer zone is inconsistent , such case frequently can lead between heat-exchanging tube bundle and connector drum and heat-exchanging tube bundle ectonexine between to generate larger heat swollen Swollen difference.Due to the presence of heat expansion difference, will be generated not in the jointing position of exchanger tubes and tubesheets and other relevant connection positions Acceptable thermal stress.For this problem, the structure design of the most pressurized water reactor nuclear power station steam generator of active service is given Most typical solution: u shape heat exchanger tube is used.
For large-scale sodium-cooled fast reactor Intermediate Heat Exchanger, heat-exchanging tube bundle up to thousands of, answer by the heat as caused by thermal expansion difference Power problem is very prominent.Pool type natrium cold fast reactor Intermediate Heat Exchanger, due to the arrangement requirement in heap, the disengaging of Intermediate Heat Exchanger secondary side Upper side region will be arranged in mouth adapter tube, and maturation is applied to the scheme for the U-shaped heat exchanger tube that PWR steam generator uses It is not particularly suited for fast reactor Intermediate Heat Exchanger.Due to such basic structure of Intermediate Heat Exchanger, other some schemes are such as used The scheme of hockey stick bulb and use bellows is also not suitable for.Therefore it is badly in need of researching and developing a kind of heat exchanger tube and heat exchanger changes to solve centre Hot device thermal stress issues due to caused by thermal expansion difference.
Summary of the invention
(1) purpose invented
In order to overcome the deficiencies of the prior art, present disclose provides a kind of elimination heat exchanger since thermal expansion difference causes thermal stress The heat exchanger tube of problem and the heat exchanger for using the heat exchanger tube.
(2) technical solution
A kind of heat exchanger tube of heat exchanger, the heat exchanger tube use spatially spiral structure;Heat exchanger tube include: the first straight pipe, First spatially spiral bend loss, intermediate straight pipe, second space spiral bending tube section, the second straight pipe;
Wherein first straight pipe one end is fixedly connected on upper perforated plate;Wherein first straight pipe, the first spatially spiral Bend loss, intermediate straight pipe, second space spiral bending tube section, the second straight pipe are fixedly connected sequentially, and the second straight pipe is fixed It is connected on lower perforated plate.
The first spatially spiral bend loss is along the stringing radius bend for restraining place layer.
The axial centre of the second space spiral bending tube section and the first spatially spiral bend loss relative to intermediate straight pipe Cross section is symmetrical.
First and second spatially spiral bend loss ovality≤5%.
The first and second spatially spiral of the heat exchanger tube bend loss wall thickness change amount≤± 0.11mm.
First and second straight pipe, intermediate straight pipe and additional space spiral bending tube section junction are with the tube hub line that exchanges heat On the basis of bending radius be 90~200mm.
The screw pitch of the first and second spatially spiral bend loss is 490~550mm.
Heat exchange tube center distance of the heat exchanger tube on the basis of the tube hub line that exchanges heat is 133.5~1057.5mm.
The central angle of the first and second spatially spiral bend loss is 10~91 °.
A kind of heat exchanger, comprising: fixed tube sheet, shell, end socket, heat exchanger tube, baffle plate, which is characterized in that the heat exchange Pipe uses the heat exchanger tube of structure described in claim 1;The set of heat exchange tubes at heat-exchanging tube bundle use arranged in concentric circles, and should It is supported between the heat exchanger tube of heat-exchanging tube bundle using corrugated steel band or band steel band.
(3) beneficial effect
The heat exchanger tube that the disclosure provides, in umbilical line and has not been changed integral into cylindrical structure, therefore maintain original There are the basic structure of heat exchanger and the arrangement of heat exchanger tube tube bank, avoids because replacement heat exchange tube structure redesigns heat exchange Device and increased extensive work.
In addition on the basis of keeping heat exchanger basic structure, by heat exchange tube design at spatially spiral structure, so that heat exchange Pipe is provided with flexible surplus in the longitudinal and transverse direction, to release thermal stress of the heat-exchanging tube bundle after heated, significantly It avoids because connecting problem of Cracking caused by thermal stress.
It is made heat exchanger using heat exchanger tube provided by the disclosure, there is flexible surplus on horizontal and vertical, To release the thermal stress after heat-exchanging tube bundle is heated, it largely avoided the problem of Cracking of heat exchanger tube junction, reduce leakage The frequency of accident improves the service life of heat exchanger.
Detailed description of the invention
Fig. 1 is the heat exchanger tube single tube structure schematic diagram of an embodiment of the present disclosure;
Fig. 2 is the heat exchanger structure schematic diagram using heat exchanger tube shown in Fig. 1;
Fig. 3 is the heat-exchanging tube bundle covering of the fan structural schematic diagram of heat exchanger shown in Fig. 2;
The wherein intermediate 4 second space spiral bending tube section 5 of straight pipe of 1 first straight pipe, 2 first spatially spiral bend loss 3 Second straight pipe;
Specific embodiment
The technical solution of the disclosure is further elaborated with reference to the accompanying drawing.
Fixed tube-sheet exchanger uses the heat exchanger tube of spatially spiral structure, and heat exchanger tube includes: the first straight pipe 1, first Spatially spiral bend loss 2, intermediate straight pipe 3, second space spiral bending tube section 4, the second straight pipe 5;
Wherein 1 one end of the first straight pipe is fixedly connected on upper perforated plate;Wherein the first straight pipe 1, the first spatially spiral are curved Pipeline section 2, intermediate straight pipe 3, second space spiral bending tube section 4, the second straight pipe 5 are fixedly connected sequentially, and the second straight pipe 5 is solid Surely it is connected on lower perforated plate.And first spatially spiral bend loss 2 along tube bank where layer stringing radius bend;Second space spiral shell It revolves bend loss 4 and the first spatially spiral bend loss is symmetrical relative to the axial centre cross section of intermediate straight pipe 3.
Using above-mentioned heat exchanger tube, in umbilical line and have not been changed integral into cylindrical structure, therefore maintain original change Hot device basic structure and heat exchanger tube tube bank arrangement, avoid because replacement heat exchange tube structure redesign heat exchanger and Increased extensive work.
In addition on the basis of keeping heat exchanger basic structure, by heat exchange tube design at spatially spiral structure, so that heat exchange Pipe is provided with flexible surplus in the longitudinal and transverse direction, to release thermal stress of the heat-exchanging tube bundle after heated, significantly It avoids because connecting problem of Cracking caused by thermal stress.
Embodiment 1
Heat exchanger operating condition is 516 DEG C, 353 DEG C of primary side out temperature.Secondary side out temperature is 310 DEG C, 495 ℃;
The heat exchanger tube of heat exchanger using the above structure, heat exchanger tube material be 304 stainless steels, heat exchange tube specification using φ 16 × 1.4, heat exchanger tube overall length is 4300mm, totally nine layers of heat exchanger tube.First flow development length is 1300mm, and the second flow development length is 1900mm, intermediate flow development length are 100mm, the bending of intermediate straight pipe and the first and second Spatial helical bending connection between pipe sections Radius is 100mm, and the bending radius of the first and second straight pipe and additional space spiral bending tube section junction is 100mm, in heat exchanger tube The heart is away from by innermost layer 133.5mm to outermost layer 305.5mm equal difference arrangement;Nine layers of heat exchanger tube the first and second spatially spiral bend loss Central angle is respectively as follows: 90 °, 78 °, 68.5 °, 61 °, 55 °, 50 °, 46 °, 42.6 °, 39.6 ° from inside to outside;It is used between heat exchanger tube Corrugated steel band or the support of band steel band, and using arranged in concentric circles at heat-exchanging tube bundle.
The screw pitch of nine layers of heat exchanger tube the first and second spatially spiral bend loss is equal are as follows: 500mm;Nine layers of heat exchanger tube first and second Spatially spiral bend loss ovality≤5%, nine layer heat exchanger tube the first and second spatially spiral bend loss wall thickness change amount≤± 0.11mm。
By with the heat exchanger that uses straight pipe type heat exchanger tube under same operating condition, pulling force suffered by exchanger tubes and tubesheets junction subtracts Few 25% or so.
Embodiment 2
The present embodiment uses the identical device of embodiment 1, the difference is that:
Heat exchanger operating condition is 516 DEG C, 353 DEG C of primary side out temperature.Secondary side out temperature is 310 DEG C, 495 ℃;
The heat exchanger tube of heat exchanger using the above structure, heat exchanger tube material are 304h stainless steel, and heat exchange tube specification uses φ 14 × 1.2, heat exchanger tube overall length is 5760mm, totally nine layers of heat exchanger tube.First flow development length is 1700mm, and the second flow development length is 3000mm, intermediate flow development length are 80mm, the bending half of intermediate straight pipe and the first and second Spatial helical bending connection between pipe sections Diameter is 90mm, and the bending radius of the first and second straight pipe and additional space spiral bending tube section junction is 90mm, and exchange heat tube center distance It is arranged by innermost layer 300mm to outermost layer 500mm equal difference;The central angle of nine layers of heat exchanger tube the first and second spatially spiral bend loss from It is interior to be respectively as follows: 91 °, 80 °, 70 °, 60 °, 50 °, 40 °, 30 °, 20 °, 10 ° to outer;Corrugated steel band or band steel are used between heat exchanger tube Band support, and using arranged in concentric circles at heat-exchanging tube bundle.
The screw pitch of nine layers of heat exchanger tube the first and second spatially spiral bend loss is equal are as follows: 490mm;Nine layers of heat exchanger tube first and second Spatially spiral bend loss ovality≤5%, nine layer heat exchanger tube the first and second spatially spiral bend loss wall thickness change amount≤± 0.11mm。
By with the heat exchanger that uses straight pipe type heat exchanger tube under same operating condition, pulling force suffered by exchanger tubes and tubesheets junction subtracts Few 20% or so.
Embodiment 3
The present embodiment uses the identical device of embodiment 1, the difference is that:
Heat exchanger operating condition is 516 DEG C, 353 DEG C of primary side out temperature.Secondary side out temperature is 310 DEG C, 495 ℃;
The heat exchanger tube of heat exchanger using the above structure, heat exchanger tube material be 316 stainless steels, heat exchange tube specification using φ 16 × 1.2, heat exchanger tube overall length is 4910mm, totally nine layers of heat exchanger tube.First flow development length is 2100mm, and the second flow development length is 1700mm, intermediate flow development length are 70mm, the bending half of intermediate straight pipe and the first and second Spatial helical bending connection between pipe sections Diameter is 130mm, and the bending radius of the first and second straight pipe and additional space spiral bending tube section junction is 130mm, and exchange heat tube hub Away from by innermost layer 500mm to outermost layer 700mm equal difference arrangement;The central angle of nine layers of heat exchanger tube the first and second spatially spiral bend loss It is respectively as follows: 90 °, 78 °, 68.5 °, 61 °, 55 °, 50 °, 46 °, 42.6 °, 39.6 ° from inside to outside;Corrugated steel is used between heat exchanger tube Band or the support of band steel band, and using arranged in concentric circles at heat-exchanging tube bundle.
The screw pitch of nine layers of heat exchanger tube the first and second spatially spiral bend loss is equal are as follows: 520mm;Nine layers of heat exchanger tube first and second Spatially spiral bend loss ovality≤5%, nine layer heat exchanger tube the first and second spatially spiral bend loss wall thickness change amount≤± 0.11mm。
By with the heat exchanger that uses straight pipe type heat exchanger tube under same operating condition, pulling force suffered by exchanger tubes and tubesheets junction subtracts Few 30%.
Embodiment 4
The present embodiment uses the identical device of embodiment 1, the difference is that:
Heat exchanger operating condition is 516 DEG C, 353 DEG C of primary side out temperature.Secondary side out temperature is 310 DEG C, 495 ℃;
The heat exchanger tube of heat exchanger using the above structure, heat exchanger tube material are 316L stainless steel, and heat exchange tube specification uses φ 18 × 1.4, heat exchanger tube overall length is 5140mm, totally nine layers of heat exchanger tube.First flow development length is 2500mm, and the second flow development length is 1500mm, intermediate flow development length are 60mm, the bending half of intermediate straight pipe and the first and second Spatial helical bending connection between pipe sections Diameter is 160mm, and the bending radius of the first and second straight pipe and additional space spiral bending tube section is 160mm, and the tube center distance that exchanges heat is by most Internal layer 700mm arranges to outermost layer 900mm equal difference;The central angle of nine layers of heat exchanger tube the first and second spatially spiral bend loss from it is interior to It is respectively as follows: 90 °, 78 °, 68.5 °, 61 °, 55 °, 50 °, 46 °, 42.6 °, 39.6 ° outside;Corrugated steel band or flat is used between heat exchanger tube Steel band support, and using arranged in concentric circles at heat-exchanging tube bundle.
The screw pitch of nine layers of heat exchanger tube the first and second spatially spiral bend loss is equal are as follows: 540mm;Nine layers of heat exchanger tube first and second Spatially spiral bend loss ovality≤5%, nine layer heat exchanger tube the first and second spatially spiral bend loss wall thickness change amount≤± 0.11mm。
By with the heat exchanger that uses straight pipe type heat exchanger tube under same operating condition, pulling force suffered by exchanger tubes and tubesheets junction subtracts Few 40%.
Embodiment 5
The present embodiment uses the identical device of embodiment 1, the difference is that:
Heat exchanger operating condition is 516 DEG C, 353 DEG C of primary side out temperature.Secondary side out temperature is 310 DEG C, 495 ℃;
The heat exchanger tube of heat exchanger using the above structure, heat exchanger tube material are 316h stainless steel, and heat exchange tube specification uses φ 20 × 1.4, heat exchanger tube overall length is 5450mm, totally nine layers of heat exchanger tube.First flow development length is 3000mm, and the second flow development length is 1300mm, intermediate flow development length are 50mm, the bending half of intermediate straight pipe and the first and second Spatial helical bending connection between pipe sections Diameter is 200mm, and the bending radius of the first and second straight pipe and additional space spiral bending tube section junction is 200mm, and exchange heat tube hub Away from by innermost layer 900mm to outermost layer 1057.5mm equal difference arrangement;The center of nine layers of heat exchanger tube the first and second spatially spiral bend loss Angle is respectively as follows: 90 °, 78 °, 68.5 °, 61 °, 55 °, 50 °, 46 °, 42.6 °, 39.6 ° from inside to outside;Ripple is used between heat exchanger tube Steel band or the support of band steel band, and using arranged in concentric circles at heat-exchanging tube bundle.
The screw pitch of nine layers of heat exchanger tube the first and second spatially spiral bend loss is equal are as follows: 550mm;Nine layers of heat exchanger tube first and second Spatially spiral bend loss ovality≤5%, nine layer heat exchanger tube the first and second spatially spiral bend loss wall thickness change amount≤± 0.11mm。
By with the heat exchanger that uses straight pipe type heat exchanger tube under same operating condition, pulling force suffered by exchanger tubes and tubesheets junction subtracts Few about 45%.
Obviously, those skilled in the art can carry out various modification and variations without departing from the essence of the disclosure to the disclosure Mind and range.If in this way, these modifications and variations of the disclosure are belonged to the model of disclosure claim and its equivalent technology Within enclosing, then the disclosure is also intended to include these modifications and variations.Above-described embodiment or embodiment are only to the disclosure For example, the disclosure can also be implemented with other ad hoc fashions or other particular form, without departing from the disclosure Main idea or substantive characteristics.Therefore, the embodiment of description is regarded as illustrative and non-limiting in any way.This Scope of disclosure should be illustrated that any variation equivalent with the intention and range of claim also should include by appended claims Within the scope of this disclosure.

Claims (10)

1. a kind of heat exchanger tube of heat exchanger, which is characterized in that the heat exchanger tube uses spatially spiral structure;Heat exchanger tube includes: First straight pipe (1), the first spatially spiral bend loss (2), intermediate straight pipe (3), second space spiral bending tube section (4), second Straight pipe (5);
Wherein the first straight pipe (1) one end is fixedly connected on upper perforated plate;Wherein first straight pipe (1), the first space spiral shell Rotation bend loss (2), intermediate straight pipe (3), second space spiral bending tube section (4), the second straight pipe (5) are fixedly connected sequentially, and Second straight pipe (5) is fixedly connected on lower perforated plate.
2. a kind of heat exchanger tube of heat exchanger according to claim 1, which is characterized in that the first spatially spiral bend pipe Section (2) is along the stringing radius bend for restraining place layer.
3. a kind of heat exchanger tube of heat exchanger according to claim 1, which is characterized in that the second space spiral bending tube Section (4) is empty symmetrical relative to the axial centre cross section of intermediate straight pipe (3) into spiral bending tube section with first.
4. a kind of heat exchanger tube of heat exchanger according to claim 1, which is characterized in that first and second spatially spiral Bend loss (2,4) ovality≤5%.
5. a kind of heat exchanger tube of heat exchanger according to claim 1, which is characterized in that the heat exchanger tube first and second is empty Between spiral bending tube section (2,4) wall thickness change amount≤± 0.11mm.
6. a kind of heat exchanger tube of heat exchanger according to claim 1, which is characterized in that first and second straight pipe (1, 5), intermediate straight pipe (3) and bending radius of the additional space spiral bending tube section junction on the basis of the tube hub line that exchanges heat are 90 ~200mm.
7. a kind of heat exchanger tube of heat exchanger according to claim 1, which is characterized in that first and second spatially spiral The screw pitch of bend loss (2,4) is 490~550mm.
8. a kind of heat exchanger tube of heat exchanger according to claim 1, which is characterized in that the heat exchanger tube is in heat exchanger tube Heat exchange tube center distance on the basis of heart line is 133.5~1057.5mm.
9. a kind of heat exchanger tube of heat exchanger according to claim 1, which is characterized in that first and second spatially spiral The central angle of bend loss (2,4) is 10~91 °.
10. a kind of heat exchanger, comprising: fixed tube sheet, shell, end socket, heat exchanger tube, baffle plate, which is characterized in that the heat exchanger tube Using the heat exchanger tube of structure described in claim 1;The set of heat exchange tubes at heat-exchanging tube bundle use arranged in concentric circles, and this is changed It is supported between the heat exchanger tube of heat pipe bundle using corrugated steel band or band steel band.
CN201810921516.8A 2018-08-14 2018-08-14 A kind of heat exchanger tube of heat exchanger and heat exchanger using the heat exchanger tube Pending CN109029021A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110008579A (en) * 2019-03-29 2019-07-12 中国原子能科学研究院 The design method of vertical fins tubing heat exchanger
CN111486740A (en) * 2020-04-23 2020-08-04 中国原子能科学研究院 Heat exchanger and method of assembling the same
CN113776356A (en) * 2021-07-02 2021-12-10 清华大学 Spiral tube type heat exchanger

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201653198U (en) * 2010-04-08 2010-11-24 山东豪迈机械制造有限公司 Heat exchange device
US20180086634A1 (en) * 2015-05-14 2018-03-29 Shell Oil Company Process for preparing a syngas and syngas cooling device
CN209214412U (en) * 2018-08-14 2019-08-06 中国原子能科学研究院 A kind of heat exchanger tube of heat exchanger and heat exchanger using the heat exchanger tube

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201653198U (en) * 2010-04-08 2010-11-24 山东豪迈机械制造有限公司 Heat exchange device
US20180086634A1 (en) * 2015-05-14 2018-03-29 Shell Oil Company Process for preparing a syngas and syngas cooling device
CN209214412U (en) * 2018-08-14 2019-08-06 中国原子能科学研究院 A kind of heat exchanger tube of heat exchanger and heat exchanger using the heat exchanger tube

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110008579A (en) * 2019-03-29 2019-07-12 中国原子能科学研究院 The design method of vertical fins tubing heat exchanger
CN110008579B (en) * 2019-03-29 2021-06-25 中国原子能科学研究院 Design method of vertical fin tube type heat exchanger
CN111486740A (en) * 2020-04-23 2020-08-04 中国原子能科学研究院 Heat exchanger and method of assembling the same
CN111486740B (en) * 2020-04-23 2021-09-28 中国原子能科学研究院 Heat exchanger and method of assembling the same
CN113776356A (en) * 2021-07-02 2021-12-10 清华大学 Spiral tube type heat exchanger

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