CN109084602A - A method of improving the tubular heat exchanger cycle of operation - Google Patents
A method of improving the tubular heat exchanger cycle of operation Download PDFInfo
- Publication number
- CN109084602A CN109084602A CN201810706133.9A CN201810706133A CN109084602A CN 109084602 A CN109084602 A CN 109084602A CN 201810706133 A CN201810706133 A CN 201810706133A CN 109084602 A CN109084602 A CN 109084602A
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- China
- Prior art keywords
- heat exchanger
- tubular heat
- solution
- improving
- crystal
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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.)
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Classifications
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- 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
- F28D7/16—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 arranged in parallel spaced relation
Abstract
The invention discloses a kind of methods for improving the tubular heat exchanger cycle of operation, the surface accuracy of tubular heat exchanger inner surface is improved to reduce crystal produced by solution crystallizes in the attachment probability of tubular heat exchanger inner surface, and improves the internal circulating load of solution in tubular heat exchanger tube side at runtime.The beneficial effects of the present invention are: the present invention can reduce the probability that crystal adheres in tubular heat exchanger inner surface by improving the surface accuracy of tubular heat exchanger inner surface, by the internal circulating load for increasing solution, reduce the contact duration of solution and tubular heat exchanger inner surface, to reduce a possibility that crystal is attached to tubular heat exchanger inner surface, tubular heat exchanger inner surface and increased solution internal circulating load in conjunction with high surface accuracy, it can slow down or crystal is avoided to thicken crystallizing layer to influence heat exchange in the inner surface attachment of tubular heat exchanger, to be advantageously implemented continuous production work.
Description
Technical field
It is a kind of method for improving the tubular heat exchanger cycle of operation specifically the present invention relates to chemical field is applied.
Background technique
It is industry problems always using tubular heat exchanger tube side blocking in chemical industry, it is especially molten with easy crystallization property
Liquid.By taking sodium sulphate as an example: tubular heat exchanger tube side is sodium sulfate crystal mixed solution, and shell side is steam, when sodium sulfate crystal is mixed
It closes solution temperature and is heated to 70 DEG C or more, easily in the crystallization of tubular heat exchanger tube side, fouling, finally block pipeline, directly affect column
Heat exchange of heat pipe heat transfer effect.Can only be out of service after operation 48 hours, tubular heat exchanger is rinsed, after so that crystallization is fallen off
It can continue to use, affect production efficiency.
Summary of the invention
The present invention, which inscribes technology to be solved and asks, is to provide a kind of method for improving the tubular heat exchanger cycle of operation, reduces molten
The probability that liquid crystallizes in tubular heat exchanger, enables tubular heat exchanger to use for a long time, and cleaning is avoided to crystallize and cause to produce
The problem of low efficiency.
The technical scheme to solve the above technical problems is that a kind of side for improving the tubular heat exchanger cycle of operation
Method improves the surface accuracy of tubular heat exchanger inner surface to reduce crystal produced by solution crystallizes in tubular heat exchanger inner surface
Adhere to probability, and improves the internal circulating load of solution in tubular heat exchanger tube side at runtime.
The beneficial effects of the present invention are: the surface accuracy of tubular heat exchanger inner surface is higher, crystal is more difficult to adhere to, and passes through
The surface accuracy for improving tubular heat exchanger inner surface can reduce the probability that crystal adheres in tubular heat exchanger inner surface.Pass through increasing
The internal circulating load of solubilization liquid reduces the contact duration of solution and tubular heat exchanger inner surface, changes to reduce crystal and be attached to tubulation
A possibility that hot device inner surface.Tubular heat exchanger inner surface and increased solution internal circulating load in conjunction with high surface accuracy, can
Slow down or crystal is avoided to thicken crystallizing layer to heat exchange is influenced in the inner surface attachment of tubular heat exchanger, to be conducive to reality
Existing continuous production.
Based on the above technical solution, the present invention can also be improved as follows.
Further, the method for improving the surface accuracy of tubular heat exchanger inner surface is using mechanical mirror finish, grinding, essence
One of milling, smart car.
Using the beneficial effect of above-mentioned further scheme is: being processed convenient for the inner surface to tubular heat exchanger to reach
Required surface finish requirements.
Based on the above technical solution, the present invention can also be improved as follows.
Further, the surface roughness of the tubular heat exchanger inner surface is less than or equal to Ra0.8 μm.
Using the beneficial effect of above-mentioned further scheme is: can reduce crystal in the attached of tubular heat exchanger inner surface with this
Point, to slow down or avoid crystal from adhering in the inner surface of tubular heat exchanger and generate crystallizing layer.
Based on the above technical solution, the present invention can also be improved as follows.
Further, the internal circulating load of the solution is greater than or equal to 450m3/h。
Beneficial effect using above-mentioned further scheme is: reducing the probability that crystal adheres in tubular heat exchanger inner surface.
Based on the above technical solution, the present invention can also be improved as follows.
Further, flow velocity of the solution in tubular heat exchanger is improved to reduce the probability that solution crystallizes in tube side.
Beneficial effect using above-mentioned further scheme is: reducing the probability that crystal adheres in tubular heat exchanger inner surface.
Based on the above technical solution, the present invention can also be improved as follows.
Further, the flow velocity is greater than or equal to 2m/s.
Beneficial effect using above-mentioned further scheme is: reducing the probability that crystal adheres in tubular heat exchanger inner surface.
Specific embodiment
Principle and feature of the invention below are described, and the given examples are served only to explain the present invention, is not intended to limit
The scope of the present invention.
Embodiment 1:
In the present embodiment, a method of the tubular heat exchanger cycle of operation is improved, the table of tubular heat exchanger inner surface is improved
Face precision improves tubulation to reduce crystal produced by solution crystallizes in the attachment probability of tubular heat exchanger inner surface at runtime
The internal circulating load of solution in heat exchanger tube pass.
Tubular heat exchanger is a kind of heat exchanger most widely used in current chemical industry and Alcohol Production.When heat exchange, make to need to change
The liquid of heat flows to the other end from one end of tubular heat exchanger, and heat exchange is carried out in the tube side of tubular heat exchanger.The prior art
Under the conditions of, the inner surface contacted in tubular heat exchanger with solution is influenced to have more attachment point by machining accuracy, is being cooled down
In the process, the crystal being precipitated in solution because of saturation is easy to adhere on attachment point, when the thickness of crystal reaches certain numerical value
The efficiency of tubular heat exchanger heat transfer will be reduced, to influence the efficiency of solution heat exchange, finally has to shut down and clean column
The inner surface of heat exchange of heat pipe, washing off crystal can reuse later.The crystal washed off is not easy recycling and reusing, shuts down
It will affect production efficiency.
This programme can reduce attachment point by using the mode for the surface accuracy for improving tubular heat exchanger inner surface, thus
Reduce the probability that crystal adheres in tubular heat exchanger inner surface.And in tubular heat exchanger operation, the internal circulating load of solution is improved,
The corresponding time for reducing crystal growth.It can be slowed down with this or prevent crystal in the attachment of tubular heat exchanger inner surface, grow, from
And the efficiency of tubular heat exchanger heat transfer is avoided to reduce.It can correspondingly improve the cycle of operation of tubular heat exchanger, reduce and shut down
The adverse effect that production efficiency is generated.
Embodiment 2:
On the basis of the above embodiments, in the present embodiment, the surface accuracy for improving tubular heat exchanger inner surface uses machine
One of tool mirror finish, grinding, finish-milling, smart car.
In the present embodiment, the mechanical mirror finish carries out tubular heat exchanger inner surface in the way of machining
Processing is to obtain smooth inner surface, to reduce the attachment for being easy to be crystallized attachment on tubular heat exchanger inner surface and growing
Point.Specifically the inner surface of tubular heat exchanger is processed by shot blasting using polishing wheel.
The grinding uses grinding wheel to be processed in a manner of grinding to the inner surface of tubular heat exchanger, to obtain
The inner surface of high surface accuracy, purpose, which is equally to reduce, to be easy to be crystallized attachment and grows on tubular heat exchanger inner surface
Attachment point.
The finish-milling finishes the inner surface of tubular heat exchanger in the way of milling, to obtain high surface essence
The inner surface of degree.
The smart car finishes the inner surface of tubular heat exchanger in the way of turning, to obtain high surface essence
The inner surface of degree.
In the present embodiment, by using it is above-mentioned but be not limited only to above-mentioned processing method to the inner surface of tubular heat exchanger into
Row working process, and the surface roughness of tubular heat exchanger inner surface is made to be less than or equal to Ra0.8 μm.Surface roughness is smaller,
I.e. surface accuracy is higher, is easy to be crystallized attachment on tubular heat exchanger inner surface and the attachment point grown is fewer, be less susceptible to by
Adhere to and generates crystallizing layer.But surface accuracy is higher, corresponding processing cost and difficulty of processing are higher.
In the present embodiment, the surface roughness of tubular heat exchanger inner surface is set to reach Ra0.8 μm, the use of tubular heat exchanger
Period can be improved 1 to 2 times.By taking sodium sulphate as an example, traditional tubular heat exchanger is cleaned after running 48 hours, is made
The surface roughness of tubular heat exchanger inner surface reaches Ra0.8 μm, can make tubular heat exchanger continuous service 96 to 144 hours.
The surface roughness of tubular heat exchanger inner surface is set to reach Ra0.5 μm, the service life of tubular heat exchanger can mention
It is 4 to 5 times high.It can correspondingly make tubular heat exchanger continuous service 240 to 288 hours.Within the unit time, reduces tubulation and change
Hot device needs the number cleaned, to be conducive to improve production efficiency.In the present embodiment, other contents not described and above-mentioned reality
It is identical to apply example, therefore does not repeat.
Embodiment 3:
On the basis of above-described embodiment 2, in the present embodiment, the internal circulating load of the solution improve on the original basis to
1.5 times or be greater than 1.5 times.By increasing internal circulating load, more solution can be made to pass through tubular heat exchanger within the unit time,
The crystal that solution is precipitated in the unit time is reduced, contact duration of the solution with tubular heat exchanger is reduced, is precipitated so as to reduce
Crystal and attachment point contact a possibility that.
Under the conditions of the prior art, when the original internal circulating load of tubular heat exchanger be 300m3/h, internal circulating load is improved to 600m3/
H, on the basis of so that the surface roughness of tubular heat exchanger inner surface is reached Ra0.5 μm, can make tubular heat exchanger uses week
Phase can be improved 6 to 8 times.By taking sodium sulphate as an example, tubular heat exchanger continuous service can be made 336 to 384 hours.
In the present embodiment, the increase of solution internal circulating load is realized by increasing the power of circulating pump, for example, by using bigger function
The circulating pump of rate.In the present embodiment, other contents not described are same as the previously described embodiments, therefore do not repeat.
Embodiment 4:
On the basis of above-described embodiment 1 or 2, in the present embodiment, flow velocity of the solution in tubular heat exchanger is improved to drop
The probability that low solution crystallizes in tube side.By increasing the flow velocity of solution, the crystal for being able to drive precipitation quickly leaves tubulation
In heat exchanger, to reduce the probability that crystal adheres in tubular heat exchanger inner surface.In the present embodiment, the flow velocity improve to
1.5 times of the original flow velocity of solution or it is greater than 1.5 times.
Under the conditions of the prior art, the flow velocity of solution is generally 1.2m/s in tubular heat exchanger, by the flow velocity of solution improve to
2.4m/s can reduce the probability that crystal adheres in attachment point.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of method for improving the tubular heat exchanger cycle of operation, it is characterised in that: improve the surface of tubular heat exchanger inner surface
Precision improves tubulation at runtime and changes to reduce crystal produced by solution crystallizes in the attachment probability of tubular heat exchanger inner surface
The internal circulating load of solution in hot device tube side.
2. a kind of method for improving the tubular heat exchanger cycle of operation according to claim 1, it is characterised in that: improve tubulation
The method of the surface accuracy of heat exchanger inner surface is using one of mechanical mirror finish, grinding, finish-milling, smart car.
3. a kind of method for improving the tubular heat exchanger cycle of operation according to claim 2, it is characterised in that: the column
The surface roughness of heat exchange of heat pipe inner surface is less than or equal to Ra0.8 μm.
4. a kind of method for improving the tubular heat exchanger cycle of operation according to claim 1, it is characterised in that: described is molten
The internal circulating load of liquid is greater than or equal to 450m3/h。
5. a kind of method for improving the tubular heat exchanger cycle of operation according to claim 1, it is characterised in that: improve solution
Flow velocity in tubular heat exchanger is to reduce the probability that solution crystallizes in tube side.
6. a kind of method for improving the tubular heat exchanger cycle of operation according to claim 5, it is characterised in that: the stream
Speed is greater than or equal to 2m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810706133.9A CN109084602A (en) | 2018-06-28 | 2018-06-28 | A method of improving the tubular heat exchanger cycle of operation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810706133.9A CN109084602A (en) | 2018-06-28 | 2018-06-28 | A method of improving the tubular heat exchanger cycle of operation |
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| CN109084602A true CN109084602A (en) | 2018-12-25 |
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| CN201810706133.9A Pending CN109084602A (en) | 2018-06-28 | 2018-06-28 | A method of improving the tubular heat exchanger cycle of operation |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1270923A (en) * | 1999-04-19 | 2000-10-25 | 内蒙古伊克昭化工研究设计院 | Non-stop cylinder washing technology for producing sodium carbonate evaportating and crystallizing natural soda |
| CN1273356A (en) * | 1999-03-11 | 2000-11-15 | 株式会社日本触媒 | Shell-and-tube heat exchanger and method for controlling polymerization in shell-and-tube heat exchanger |
| CN101430174A (en) * | 2008-12-12 | 2009-05-13 | 北京科技大学 | Method and apparatus for retarding scale formation of water heating boiler by utilizing reflux dilution turbulence |
| CN105065852A (en) * | 2015-06-08 | 2015-11-18 | 中国电建集团贵阳勘测设计研究院有限公司 | Construction method for laying pressure penstock inside water tunnel of hydropower station |
| CN107110616A (en) * | 2015-11-20 | 2017-08-29 | 春山秀之 | Heat exchange mixing arrangement and solution conveying cooling device |
-
2018
- 2018-06-28 CN CN201810706133.9A patent/CN109084602A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1273356A (en) * | 1999-03-11 | 2000-11-15 | 株式会社日本触媒 | Shell-and-tube heat exchanger and method for controlling polymerization in shell-and-tube heat exchanger |
| CN1270923A (en) * | 1999-04-19 | 2000-10-25 | 内蒙古伊克昭化工研究设计院 | Non-stop cylinder washing technology for producing sodium carbonate evaportating and crystallizing natural soda |
| CN101430174A (en) * | 2008-12-12 | 2009-05-13 | 北京科技大学 | Method and apparatus for retarding scale formation of water heating boiler by utilizing reflux dilution turbulence |
| CN105065852A (en) * | 2015-06-08 | 2015-11-18 | 中国电建集团贵阳勘测设计研究院有限公司 | Construction method for laying pressure penstock inside water tunnel of hydropower station |
| CN107110616A (en) * | 2015-11-20 | 2017-08-29 | 春山秀之 | Heat exchange mixing arrangement and solution conveying cooling device |
Non-Patent Citations (3)
| Title |
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| 赵萍、盛健、张华: "平直斜翅管表面碳酸钙污垢初始阶段结垢特性", 《热能动力工程》 * |
| 赵萍、盛健、张华: "锯齿斜翅管表面碳酸钙析晶污垢初始阶段结垢特性", 《制冷学报》 * |
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Application publication date: 20181225 |
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