CN109682236A - A kind of etch-proof ship high temperature heat exchanger - Google Patents
A kind of etch-proof ship high temperature heat exchanger Download PDFInfo
- Publication number
- CN109682236A CN109682236A CN201811594414.6A CN201811594414A CN109682236A CN 109682236 A CN109682236 A CN 109682236A CN 201811594414 A CN201811594414 A CN 201811594414A CN 109682236 A CN109682236 A CN 109682236A
- Authority
- CN
- China
- Prior art keywords
- shell
- heat exchanger
- pipe side
- pipe
- entrance
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/02—Heat-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
- F28D7/028—Heat-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 the conduits of at least one medium being helically coiled, the coils having a conical configuration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/006—Tubular elements; Assemblies of tubular elements with variable shape, e.g. with modified tube ends, with different geometrical features
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
-
- 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
- F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
Abstract
The invention discloses a kind of etch-proof ship high temperature heat exchangers, include: shell, shell-side inlet, shell-side outlet are respectively arranged on the side wall of the shell both ends, the shell is cylindrical shape, along the shell-side outlet to the shell-side inlet, the internal diameter of shell is gradually increased；The central tube of fixed setting inside housings, along the shell-side outlet to the shell-side inlet, the outer diameter of central tube is gradually increased；Inside housings around the heat exchanger tube of central tube setting, the heat exchanger tube both ends are respectively arranged with pipe side-entrance, pipe side outlet, and along the pipe side-entrance to the pipe side outlet, the caliber of heat exchanger tube is gradually reduced；It is related to ship exchange piece field.The present invention can prevent the intracorporal seawater of shell from exchanging heat pipe outer wall in the entrance boiling of high-temperature medium and generating cavitation damage, and be conducive to improve the security reliability of heat exchanger.
Description
Technical field
The present invention relates to ship exchange piece technical fields, are specifically related to a kind of etch-proof ship high temperature heat exchanger.
Background technique
In order to meet use and service requirement, ship power system is needed using seawater to high-temperature-hot-water, high-temperature steam etc.
Medium is cooled down.In the equipment that this kind of seawater and high-temperature medium exchange heat, security reliability is always a to be difficult to solve
The problem of.Practical operating experiences show that this kind of high-temperature heat-exchanging is primarily present following problems:
The material of ship high temperature heat exchanger tube pass and shell side is BFe30-1-1 iron white copper, and cooling water is seawater, for a long time
After operation, the seawater side pipe wall erosion of high-temperature heat-exchanging inducer is serious, and even corrosion failure occurs for regional area；High temperature changes
What hot device generallyd use is coil heat exchanger, and coil pipe is corroded after perforation, high-temperature medium directly with seawater blend so that device without
Method works on, or even causes accident, seriously affects the safe and reliable operation of entire ship power system.
Practical operating experiences show that heat exchanger tube etching problem has following rule:
(1) etching problem is only present in using seawater as in the high-temperature heat-exchanging of cooling medium, and other with fresh water is cooling be situated between
The high-temperature heat-exchanging of matter does not occur similar etching problem；
(2) the higher region of hot side medium temperature is (predominantly hot to survey the 1st~3 of medium entrance end in high-temperature heat-exchanging
Circle) all corrode, the lower region of media outlet end temperature, which is surveyed, by near-thermal does not corrode；
(3) homogeneous corrosion of the existing large area of heat exchanger tube corrosion area, also there is local corrosion, and regional area is corroded through
Hole.
As can be seen that high temperature and seawater collective effect are the main reason for heavy corrosion occur for heat exchanger tube.In addition, by pair
Heat exchanger tube corrosion area surface carries out micro- sem observation and electron-microscope scanning discovery, and horseshoe is presented in the surface topography of most of etch pit
Shape is the typical pattern of cavitation damage.In conclusion heat exchanger tube high temperature section wall surface temperature is excessively high, boiling sea water is caused to form sky
Bubble, the brute force attack that bubble collapse process is formed destroy heat exchanger tube metal protective film, exchange heat tube wall under seawater and high temperature action
Heavy corrosion occurs, is the basic reason that high-temperature heat-exchanging etching problem occurs.Therefore, it reduces heat and surveys medium entrance section heat exchanger tube
Outside wall temperature, prevent boiling sea water generate vacuole, be solve high-temperature heat-exchanging etching problem effective ways.
In order to alleviate etching problem of the heat exchanger tube under high temperature and seawater collective effect, can be sprayed in high temperature pipeline section outer wall
The organic heat-barrier materials such as certain thickness polyimides or polytetrafluoroethylene (PTFE) reduce the wall surface temperature in operational process；It can be with
Increase the wall thickness of heat-exchanging tube bundle, increases corrosion allowance while reducing outside wall surface temperature.But spraying organic material can be in the presence of de-
Problem is fallen, and the method for spraying organic material and increase pipe thickness will be greatly reduced changing between heat survey medium and seawater
The thermal efficiency, this aspect will increase the volume and weight of device, and the high temperature section on the other hand also resulting in heat exchanger tube moves back.Cause
This, such method for reducing heat exchanger tube outside wall surface temperature can not fundamentally solve ship high-temperature heat exchanger in high temperature and seawater
Significant corrosion problems under collective effect can not effectively improve the security reliability of device.
Summary of the invention
The purpose of the invention is to overcome the shortcomings of above-mentioned background technique, provide one kind can high degree avoid heat exchanger tube
Corrosion improves the ship high temperature heat exchanger of ship high temperature heat exchanger security reliability.
The present invention provides a kind of etch-proof ship high temperature heat exchanger, comprising:
Shell is respectively arranged with shell-side inlet, shell-side outlet on the side wall of the shell both ends；
The central tube of fixed setting inside housings；
Inside housings around the central tube setting heat exchanger tube, the heat exchanger tube both ends be respectively arranged with pipe side into
Mouth, pipe side outlet, along the pipe side-entrance to the pipe side outlet, the caliber of heat exchanger tube is gradually reduced.
Based on the above technical solution, the shell is cylindrical shape, along the pipe side-entrance to the pipe side outlet,
The internal diameter of shell is gradually increased.
Based on the above technical solution, along the pipe side-entrance to the pipe side outlet, the wall thickness of shell is protected
It holds constant.
Based on the above technical solution, central tube described in the heat exchanger tube spiral surrounding, and along the pipe side-entrance
To the pipe side outlet, the screw diameter of heat exchanger tube is gradually increased.
Based on the above technical solution, the central tube is cylindrical shape, is gone out along the pipe side-entrance to the pipe side
Mouthful, the outer diameter of central tube is gradually increased.
Based on the above technical solution, along the pipe side-entrance to the pipe side outlet, the pipe thickness of central tube
It remains unchanged.
Based on the above technical solution, along the pipe side-entrance to the pipe side outlet, the pipe thickness of heat exchanger tube
It remains unchanged.
Based on the above technical solution, the central tube is set to the center axial position of the shell.
Compared with prior art, advantages of the present invention is as follows:
(1) a kind of etch-proof ship high temperature heat exchanger of the invention, using the heat exchanger tube for becoming caliber, in high-temperature medium
Entrance, i.e., at the pipe side-entrance of heat exchanger tube, caliber is larger, and the flow velocity of high-temperature medium is lower, the heat convection system of high-temperature medium
Number is smaller, and high-temperature medium and inside pipe wall heat transfer temperature difference are larger, and tube wall surface temperature is lower, can prevent the intracorporal seawater of shell here
It boils and exchanges heat pipe outer wall and generate cavitation damage；And in the exit of high-temperature medium, i.e. the pipe of heat exchanger tube surveys exit, caliber
Smaller, the flow velocity of high-temperature medium is higher, and the convection transfer rate of high-temperature medium is larger, is conducive to improve intraductal heat exchange coefficient.
(2) a kind of etch-proof ship high temperature heat exchanger of the invention, the seawater circulation channel used for variable section channel,
In the outlet section of seawater, seawater circulation sectional area is smaller, and seawater velocity is higher, and the convection transfer rate of seawater is larger, seawater with
Pipe outer wall heat transfer temperature difference is smaller, and pipe outer wall surface temperature is lower, the intracorporal seawater of shell can be further prevented to boil here and right
The pipe outer wall that exchanges heat generates cavitation damage；And in the inducer of seawater, seawater circulation sectional area is larger, and the flow velocity of seawater is lower, has
Conducive to flow resistance of the reduction seawater in circulation passage.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of etch-proof ship high temperature heat exchanger of the embodiment of the present invention.
Appended drawing reference: 1-shell, 11-shell-side inlets, 12-shell-side outlets, 2-central tubes, 3-heat exchanger tubes, 31-pipes
Side-entrance, 32-pipe side outlets.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the present invention is described in further detail.
Shown in Figure 1, the embodiment of the present invention provides a kind of etch-proof ship high temperature heat exchanger, comprising:
Shell 1 is respectively arranged with shell-side inlet 11, shell-side outlet 12 on the 1 both ends side wall of shell；
The central tube 2 being fixed inside shell 1；
In the heat exchanger tube 3 that 1 inner loop of shell is arranged around the central tube 2,3 both ends of heat exchanger tube are respectively arranged with pipe side
Import 31, pipe side outlet 32, along the pipe side-entrance 31 to the pipe side outlet 32, the caliber of heat exchanger tube 3 is gradually reduced.
It should be noted that actual use in, the shell-side inlet 11 of ship high temperature heat exchanger usually with pipe side outlet 32
In the same side of shell 1, shell-side outlet 12 is usually located at the same side of shell 1 with pipe side-entrance 31, so that the height in heat exchanger tube 3
Seawater in warm medium and shell 1 forms adverse current, plays good heat transfer effect.
A kind of etch-proof ship high temperature heat exchanger of the invention, using the heat exchanger tube 3 for becoming caliber, high-temperature medium into
At mouthful, i.e., at the pipe side-entrance 31 of heat exchanger tube 3, caliber is larger, and the flow velocity of high-temperature medium is lower, the heat convection system of high-temperature medium
Number is smaller, and high-temperature medium and inside pipe wall heat transfer temperature difference are larger, and tube wall surface temperature is lower, can prevent seawater in shell 1 herein
It boils and exchanges 3 outer wall of heat pipe and generate cavitation damage in place；And in the exit of high-temperature medium, i.e. the pipe of heat exchanger tube 3 measures mouth 32
Place, caliber is smaller, and the flow velocity of high-temperature medium is higher, and the convection transfer rate of high-temperature medium is larger, is conducive to improve intraductal heat exchange
Coefficient.
In the present embodiment, it is preferred that the shell 1 is cylindrical shape, along the pipe side-entrance 31 to the pipe side outlet
32, the internal diameter of shell 1 is gradually increased；Further, along the pipe side-entrance 31 to the pipe side outlet 32, the barrel of shell 1 is thick
Degree remains unchanged；Inside shell 1, void space between shell 1 and central tube 2 forms seawater circulation channel, along pipe side into
Mouth 31 is to pipe side outlet 32, and the internal diameter of shell 1 is gradually increased, i.e. the cross-sectional area in seawater circulation channel is gradually increased, and seawater
When flowing into from shell-side inlet 11, circulation passage sectional area is larger herein, and seawater velocity is lower, and flow resistance is small；It is flowed into seawater
When close to shell-side outlet 12, circulation passage sectional area is smaller herein, and seawater velocity is higher, and the convection transfer rate of seawater is larger,
The temperature that can effectively reduce 3 outer wall of heat exchanger tube further prevents seawater to boil here and exchanges 3 outer wall of heat pipe and generate vacuole corruption
Erosion improves the security reliability of ship high temperature heat exchanger；And 1 wall thickness of shell remains unchanged, shape is more beautiful, is convenient for shell
Body 1 is processed, its production cost can be reduced.
In the present embodiment, it is preferred that central tube 2 described in 3 spiral surrounding of heat exchanger tube, and along the pipe side-entrance 31
To the pipe side outlet 32, the screw diameter of heat exchanger tube 3 is gradually increased.As shown in Figure 1, heat exchanger tube 3 can use a spiral
Coil pipe can also be laminated using more spiral coils, is not shown in the figure, and can freely be selected, be made according to actual use demand
With flexible, application scenarios are extensive.
In the present embodiment, it is preferred that the central tube 2 is cylindrical shape, is gone out along the pipe side-entrance 31 to the pipe side
Mouth 32, the outer diameter of central tube 2 is gradually increased；Further, along the pipe side-entrance 31 to the pipe side outlet 32, central tube 2
Pipe thickness remains unchanged；Central tube 2 cooperates the arrangement of shell 1 inner space and heat exchanger tube 3, provides for seawater circulation
Circulation passage.
In the present embodiment, it is preferred that along the pipe side-entrance 31 to the pipe side outlet 32, the thickness of pipe wall of heat exchanger tube 3
Degree remains unchanged；The pipe thickness of heat exchanger tube 3 remains unchanged, and makes between the seawater in the high-temperature medium in heat exchanger tube 3 and shell 1
Heat exchange situation do not influenced by pipe thickness.
In the present embodiment, it is preferred that the central tube 2 is set to the center axial position of the shell 1；Central tube 2
It is set to 1 center axial position of shell, so that the seawater circulation channel in shell 1 is kept bilateral symmetry, is conducive in heat exchanger tube 3
High-temperature medium uniformly cools down, and using effect is more preferably.
Those skilled in the art can carry out various modifications to the embodiment of the present invention and modification, if these modifications and change
For type within the scope of the claims in the present invention and its equivalent technologies, then these modifications and variations are also in protection scope of the present invention
Within.
The prior art that the content being not described in detail in specification is known to the skilled person.
Claims (8)
1. a kind of etch-proof ship high temperature heat exchanger characterized by comprising
Shell (1) is respectively arranged with shell-side inlet (11), shell-side outlet (12) on the side wall of shell (1) both ends；
It is fixed at the internal central tube (2) of shell (1)；
In the heat exchanger tube (3) that shell (1) inner loop is arranged around the central tube (2), heat exchanger tube (3) both ends are respectively arranged with
Pipe side-entrance (31), pipe side outlet (32), along the pipe side-entrance (31) to the pipe side outlet (32), the pipe of heat exchanger tube (3)
Diameter is gradually reduced.
2. a kind of etch-proof ship high temperature heat exchanger as described in claim 1, it is characterised in that: the shell (1) is circle
Tubular, along the pipe side-entrance (31) to the pipe side outlet (32), the internal diameter of shell (1) is gradually increased.
3. a kind of etch-proof ship high temperature heat exchanger as claimed in claim 2, it is characterised in that: along the pipe side-entrance
(31) to the pipe side outlet (32), the wall thickness of shell (1) is remained unchanged.
4. a kind of etch-proof ship high temperature heat exchanger as described in claim 1, it is characterised in that: heat exchanger tube (3) spiral shell
It revolves around the central tube (2), and along the pipe side-entrance (31) to the pipe side outlet (32), the spiral of heat exchanger tube (3) is straight
Diameter is gradually increased.
5. a kind of etch-proof ship high temperature heat exchanger as described in claim 1, it is characterised in that: the central tube (2) is
Cylindrical shape, along the pipe side-entrance (31) to the pipe side outlet (32), the outer diameter of central tube (2) is gradually increased.
6. a kind of etch-proof ship high temperature heat exchanger as claimed in claim 5, it is characterised in that: along the pipe side-entrance
(31) to the pipe side outlet (32), the pipe thickness of central tube (2) is remained unchanged.
7. a kind of etch-proof ship high temperature heat exchanger as described in claim 1, it is characterised in that: along the pipe side-entrance
(31) to the pipe side outlet (32), the pipe thickness of heat exchanger tube (3) is remained unchanged.
8. a kind of etch-proof ship high temperature heat exchanger as described in claim 1, it is characterised in that: the central tube (2) sets
It is placed in the center axial position of the shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811594414.6A CN109682236B (en) | 2018-12-25 | 2018-12-25 | Anticorrosive boats and ships high temperature heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811594414.6A CN109682236B (en) | 2018-12-25 | 2018-12-25 | Anticorrosive boats and ships high temperature heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109682236A true CN109682236A (en) | 2019-04-26 |
| CN109682236B CN109682236B (en) | 2020-11-10 |
Family
ID=66189535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811594414.6A Active CN109682236B (en) | 2018-12-25 | 2018-12-25 | Anticorrosive boats and ships high temperature heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109682236B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002089970A (en) * | 2000-09-18 | 2002-03-27 | Paloma Ind Ltd | Hot water supply apparatus |
| CZ2010270A3 (en) * | 2010-04-08 | 2011-10-19 | Tesar@Jindrich | Helical heat-exchange apparatus with variable cross-sectional area |
| CN202304494U (en) * | 2011-09-30 | 2012-07-04 | 浙江真空设备集团有限公司 | Vacuum heat exchanger |
| JP2012233609A (en) * | 2011-04-28 | 2012-11-29 | Panasonic Corp | Hot water storage tank for fuel cell, and power generation system |
| CN103090703A (en) * | 2013-02-20 | 2013-05-08 | 上海光建传动控制设备有限公司 | Spirally-flowing-type heat exchanger |
| CN203358863U (en) * | 2013-07-04 | 2013-12-25 | 南京中船绿洲环保有限公司 | Ship central cooling system |
| CN204444060U (en) * | 2014-12-25 | 2015-07-08 | 重庆勤发食品有限公司 | Peach sheet slurry cooling device |
| CN108721926A (en) * | 2018-06-04 | 2018-11-02 | 东南大学 | A kind of Falling Film Evaporator of Horizontal Tube |
-
2018
- 2018-12-25 CN CN201811594414.6A patent/CN109682236B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002089970A (en) * | 2000-09-18 | 2002-03-27 | Paloma Ind Ltd | Hot water supply apparatus |
| CZ2010270A3 (en) * | 2010-04-08 | 2011-10-19 | Tesar@Jindrich | Helical heat-exchange apparatus with variable cross-sectional area |
| JP2012233609A (en) * | 2011-04-28 | 2012-11-29 | Panasonic Corp | Hot water storage tank for fuel cell, and power generation system |
| CN202304494U (en) * | 2011-09-30 | 2012-07-04 | 浙江真空设备集团有限公司 | Vacuum heat exchanger |
| CN103090703A (en) * | 2013-02-20 | 2013-05-08 | 上海光建传动控制设备有限公司 | Spirally-flowing-type heat exchanger |
| CN203358863U (en) * | 2013-07-04 | 2013-12-25 | 南京中船绿洲环保有限公司 | Ship central cooling system |
| CN204444060U (en) * | 2014-12-25 | 2015-07-08 | 重庆勤发食品有限公司 | Peach sheet slurry cooling device |
| CN108721926A (en) * | 2018-06-04 | 2018-11-02 | 东南大学 | A kind of Falling Film Evaporator of Horizontal Tube |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109682236B (en) | 2020-11-10 |
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