CN101303214A - Rotary fluid flow state cleaning type casing tube high-efficiency heat exchanger - Google Patents
Rotary fluid flow state cleaning type casing tube high-efficiency heat exchanger Download PDFInfo
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- CN101303214A CN101303214A CNA2007100349120A CN200710034912A CN101303214A CN 101303214 A CN101303214 A CN 101303214A CN A2007100349120 A CNA2007100349120 A CN A2007100349120A CN 200710034912 A CN200710034912 A CN 200710034912A CN 101303214 A CN101303214 A CN 101303214A
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Abstract
The invention discloses a fluid rotary fluidization clean-type double-pipe heat exchanging device with high efficiency, which is characterized in that a helical line is not only arranged in an annular flow channel between an outer thimble and an inner core pipe, but also in the horizontal segments of an outlet pipeline and an inlet pipeline which are connected with a fluidization particle circulation groove; the helical line of the annular flow channel can be wound on the elastic bracket of the inner pipe and fixed on the inner wall of the outer thimble or a helical fin that is directly produced on the inner wall of the outer thimble. When in normal running, the convective heat transfer of one side in the annular flow channel can be intensified by the helical line or the helical fin, thereby increasing the heat transfer film coefficient of the inside of the pipe by about 30-50 percent; when the fouling of the outer wall of the inner core pipe needs cleaning, an even fluidization cleaning can be realized by the guidance of the helical lien even if the flow velocity of cooling water in the pipe is only 0.45 m/s and the blockage of the flow channel does not happen. Due to no requirements on the rotation of the helical line, the structure is greatly simplified and the reliability is rather high.
Description
Technical field
Patent of the present invention relates to a kind of rotary fluid flow state cleaning type casing tube high-efficiency heat-exchanger rig, relates to the cooling reinforcing of double-tube heat exchanger annular channel inboard and the on-line auto-cleaning of incrustation scale.It is applicable to horizontal double-tube heat exchanger, contain horizontal sleeve pipe or contain the automatic cleaning of various dirts in the annular channel of tilt sleeve and the efficient reinforcement of convection heat transfer' heat-transfer by convection thereof.
Background technology
The use amount of double-tube heat exchanger in nitrogen fertilizer production is maximum, and the cooling condensation of the cooling ammonia component of the forming gas that comes out mainly as the interstage cooler and the synthetic tower of compressor separates.Because the radial clearance of the annular channel of double-tube heat exchanger is very little, generally has only 7.0～12.0mm.Therefore, very difficulty is cleaned in the parking of the incrustation scale in the cooling water annular channel.Relatively Chang Yong method has four classes:
The one, cooling water quality is handled and is added the chemical scale inhibition agent.Annual water treatment will spend medicament expense hundreds of thousands unit, but still wants fouling, but the speed of fouling reduces greatly.
The 2nd, Chemical cleaning.Because the incrustation scale main component is a silicates, the cleaning medicine takes expensive, and cleaning performance does not have the pickling of calcium magnesium salts dirt fast like that, good like that again.
The 3rd, artificial cleaning.Must use high-pressure spray water or compressed air blast cleaning surface dirt then with the by force extraction dismounting of hoist engine with one one of high voltage bearing inner core tube, a ground assembles again again.The maintenance personal is very tired dirty again, and takes a lot of work very much.Generally need a maintenance crew about 10 days during the check man of every heat exchanger.Therefore, every double-tube heat exchanger clean once expense (working hour expense, facility take, fee of material) up to 2.5 ten thousand yuan about.Because clean difficulty, incrustation scale can not in time be removed, cooling effect is generally very poor, thus cause high-pressure unit the energy consumption height, yield poorly, even be forced to cyclic stop and clean.
The 4th, special-purpose cleaning Vehicle is cleaned.Document (He Yunchu; double pipe heat exchanger dirt circulating fluidization on-line cleaning technology; the chemical equipment technology; 1999; 20 (5) 6-9) introduced the circulating fluidization on-line cleaning car development of double-pipe cooler dirt, needed a cleaning Vehicle that is worth about 50,000 yuan, the damage that clean and high flow rate particle erosion causes the metal surface protection film is cleaned at the bend place; two people operation, cumbersome.
Said method puts into operation after cleaning again, and the dirt of cooling water is growth gradually again, and dirt returned to the thickness before cleaning in general about 10 months, and cooling effect is variation again, does not solve its basic anti-scaling function.
For the medium of annular channel can not grow dirt, traditional structure heat exchanger, the basic shortcoming of existence is not have convection heat transfer' heat-transfer by convection to strengthen function.
Summary of the invention
Technical problem to be solved by this invention mainly is that the traditional structure double-tube heat exchanger exists and unmatchfully spreads that heat is strengthened function and can not on-line auto-cleaning antiscale two large problems, a kind of rotary fluid flow state cleaning type casing tube high-efficiency heat-exchanger rig is proposed, can under the low flow velocity about cooling water 0.50m/s, clean antiscale automatically, and the cooling reinforcing effect is better, the reliability height, with low cost, horizontal double-tube heat exchanger be can be widely used in, contain horizontal sleeve pipe or the automatic cleaning of various dirts in the annular channel of tilt sleeve and the efficient reinforcement of convection heat transfer' heat-transfer by convection thereof contained.
Technical scheme of the present invention is: a kind of rotary fluid flow state cleaning type casing tube high-efficiency heat-exchanger rig, form by outer tube, helix, inner core tube, triple valve, circulating slot, particle, cooling water turnover pipe etc.Not only be provided with helix in the annular channel between inner core tube and outer tube, and the horizontal pipeline section of cooling water turnover pipe also is provided with helix.When the radial depth of annular channel was little, helix directly was wrapped in the inner core tube outside; When the radial depth of annular channel was big, helix can be fastened on the elastic bracket of inner core tube outside, can also be fixed on the inwall of outer tube or be fabricated directly in the flight of the inwall of outer tube.Helix is generally the steel wire helix, also can be to mould Baogang's silk helix.Helix gauge of wire d is more than 1mm, by the radial clearance size decision of annular channel; The material of making helix generally is the stainless steel steel wire or moulds Baogang's silk, mainly selects according to the corrosivity and the temperature of liquid in the annular channel.The thickness of the plastics covering of steel wire adopts the engineering plastics manufacturing that wearability is good, Shooting Technique is good in the scope of 0.5mm～3.0mm.The pitch T of helix is generally the outer tube inner diameter d
i(0.5～2.0) doubly, its helical angle must be greater than the angle of friction of particle to the helix surface.Helix can have the swing that rotates in a circumferential direction discontinuous, desultory oscillatory type with respect to outer sleeve inner wall, but is generally discontinuous rotation, and its outer diameter D is the outer tube inner diameter d
i(0.80～0.98).
During usual the operation, the cooling water in the annular channel forms helical flow under the guide effect of spiral, itself be exactly the convection heat transfer' heat-transfer by convection reinforced element of annular channel, can make the coefficient of heat convection of annular channel side improve more than 30%.
When needing Fouling Cleaning, switch by water inlet pipe triple valve and outlet pipe triple valve, make cooling water earlier through the fluidization delivery tube of circulating slot bottom, obtain particle concentration and meet the fluidization liquid that Fouling Cleaning requires, the annular channel that enters double-tube heat exchanger again carries out Fouling Cleaning.Though the fluidization Particle Density is more much bigger than liquid, all the time there is trend to the bottom sedimentation of annular channel cross section, but the circumferential component velocity that the helix guiding forms can be pushed particle to top, the same even cleaning performance that cleans with lower half tube wall dirt of the upper half tube wall dirt that reaches inner core tube again.Fluidization liquid enters circulating slot top through triple valve and sand returning pipe earlier before effluxing through outlet pipe, and particle precipitation is separated in circulating slot top, and cooling water discharges again.
When Fouling Cleaning finishes, switch three-way valve, the cooling water that does not contain particle enters annular channel, and water flowing number minute makes the interior particle of annular channel all get back to circulating slot top like this.Switch three-way valve recovers normally operation then.And open communicating valve, allow the particle that in circulating slot top, reclaims enter the circulating slot bottom, close communicating valve after several minutes again.
The particle that fluidization clean to be used can be river sand, porcelain ball, Metal Ball, baton round, glueballs, selects according to the soft or hard of the corrosivity of liquid, temperature, dirt.
The particle that uses is cleaned in fluidization, adds a mouthful adding by particle.
Description of drawings
Fig. 1 is a kind of rotary fluid flow state cleaning type casing tube high-efficiency heat-exchanger rig schematic diagram of the present invention.
Fig. 2 is an a kind of rotary fluid flow state cleaning type casing tube high-efficiency heat-exchanger rig A of the present invention portion enlarged drawing.
The specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
10 circulating slot tops, 1 outer tube 2 helixes, 3 inner core tube 4 toroidal helical runners, 5 water inlet pipe triple valve 6 fluidization delivery tube, 7 particle 8 communicating valves, 9 circulating slot bottoms, 11 sand returning pipes, 12 outlet pipe triple valves, 13 outlet pipes, 14 particles among the figure are added mouthful 15 elastic brackets
A kind of rotary fluid flow state cleaning type casing tube high-efficiency heat-exchanger rig is made up of outer tube 1, helix 2, inner core tube 3, triple valve 5 and 12, particle 7, circulating slot bottom 9, circulating slot top 10 etc.All be provided with by helix 2 in the horizontal pipeline section of toroidal helical runner 4 and fluidization delivery tube 6 thereof.When the radial depth of toroidal helical runner 4 was little, helix 2 directly was wrapped in the outside of inner core tube 3; When the radial depth of toroidal helical runner 4 was big, helix 2 can be fastened on the elastic bracket 15 of inner core tube 3 outsides, also can be fixed on the inwall of outer tube 1, can also be the flight that is fabricated directly in the inwall of outer tube 1.Helix 2 is generally the steel wire manufacturing, also can be to mould Baogang's silk manufacturing.The steel wire diameter d of helix 2 is more than 1mm, by the radial clearance size decision of toroidal helical runner 4.Adopt the stainless steel steel wire still to adopt and mould Baogang's silk, mainly select according to the corrosivity and the temperature of liquid in the toroidal helical runner 4.The thickness of the plastics covering of steel wire helix 2 adopts the engineering plastics manufacturing that wearability is good, Shooting Technique is good in the scope of 0.5mm～3.0mm.The pitch T of helix 2 is generally outer tube 1 inner diameter d
i(0.5～2.0) doubly, its helical angle must be greater than the angle of friction on 7 pairs of helix 2 surfaces of particle.Helix 2 can have the swing that rotates in a circumferential direction discontinuous, desultory oscillatory type with respect to outer tube 1 inwall, and its outer diameter D is outer tube 1 inner diameter d
i(0.80～0.98) doubly.
During usual the operation, the cooling water in the toroidal helical runner 4 forms helix and flows under the guide effect of helix 2, itself is exactly the convection heat transfer' heat-transfer by convection reinforced element, can make the convection heat transfer' heat-transfer by convection film coefficient of toroidal helical runner 4 one sides improve more than 30%.
When needing Fouling Cleaning, switch by water inlet pipe triple valve 5 and triple valve 12, make cooling water earlier through the fluidization delivery tube 6 in the circulating slot bottom 9, obtain the fluidization liquid of the suitable particle of Fouling Cleaning 7 concentration, the toroidal helical runner 4 that enters double-tube heat exchanger again carries out Fouling Cleaning.Though the density of fluidization particle 7 is more much bigger than liquid, all the time there is trend to the bottom sedimentation of toroidal helical runner 4 cross sections, but the circumferential component velocity that helix 2 guiding form can be pushed particle 7 to top, the same even cleaning performance that cleans with lower half tube wall dirt of the upper half tube wall dirt that reaches inner core tube 3 again.Fluidization liquid enters circulating slot top 10 through triple valve 12 and sand returning pipe 11 earlier before effluxing through outlet pipe 13, and particle 7 sedimentation separations are on circulating slot top 10, and cooling water discharges again.
When Fouling Cleaning finishes, switch three-way valve 5, the cooling water that does not contain particle enters toroidal helical runner 4, and water flowing number minute makes toroidal helical runner 4 interior particles 7 all get back to circulating slot top 10 like this.Switch three-way valve 12 then, recover normally operation.And open communicating valve 8, allow the particle 7 in the 10 li recovery in circulating slot top enter the circulating slot bottom, close communicating valve 8 after several minutes again.
The particle 7 that fluidization clean to be used can be river sand, porcelain ball, Metal Ball, baton round, glueballs, selects according to the soft or hard of the corrosivity of liquid, temperature, dirt.
The particle 7 that uses is cleaned in fluidization, adds mouthful 14 addings by particle.
Claims (2)
1. rotary fluid flow state cleaning type casing tube high-efficiency heat-exchanger rig, be made up of outer tube (1), helix (2), inner core tube (3), particle (7), circulating slot bottom (9), circulating slot top (10) etc., it is characterized in that: toroidal helical runner (4) the lining design between outer tube (1) and the inner core tube (3) has helix (2); Also be provided with helix (2) in the horizontal segment of the connecting line of heat exchanger toroidal helical runner (4) and circulating tank top (10), circulating slot bottom (9); Between circulating slot top (10) and circulating slot bottom (9) communicating valve is arranged; Circulating slot bottom (9) is equipped with the fluidization delivery tube (6) of automatic preparation fluidization cleaning fluid.
2. according to a kind of rotary fluid flow state cleaning type casing tube high-efficiency heat-exchanger rig of claim 1, it is characterized in that: helix (2) can directly be wrapped in the outside of inner core tube (3), also can be the outside that is wrapped in inner core tube (3) by elastic bracket (15), can also be fixed on the inwall of outer tube (1) or be fabricated directly in the flight of the inwall of outer tube (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100349120A CN101303214A (en) | 2007-05-11 | 2007-05-11 | Rotary fluid flow state cleaning type casing tube high-efficiency heat exchanger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100349120A CN101303214A (en) | 2007-05-11 | 2007-05-11 | Rotary fluid flow state cleaning type casing tube high-efficiency heat exchanger |
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| CN101303214A true CN101303214A (en) | 2008-11-12 |
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| CNA2007100349120A Pending CN101303214A (en) | 2007-05-11 | 2007-05-11 | Rotary fluid flow state cleaning type casing tube high-efficiency heat exchanger |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103221756A (en) * | 2010-07-05 | 2013-07-24 | 玻点太阳能有限公司 | Direct solar steam generation |
| CN103958127A (en) * | 2011-11-24 | 2014-07-30 | 乔治洛德方法研究和开发液化空气有限公司 | Device including plenum chamber and being used for dispensing jets of cryogenic fluid |
| CN104713384A (en) * | 2015-03-13 | 2015-06-17 | 芜湖凯博实业股份有限公司 | Cooling tower |
| CN106802107A (en) * | 2017-03-22 | 2017-06-06 | 山东农业大学 | A kind of vertical rotating sewage heat exchanger and its cleaning method |
-
2007
- 2007-05-11 CN CNA2007100349120A patent/CN101303214A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103221756A (en) * | 2010-07-05 | 2013-07-24 | 玻点太阳能有限公司 | Direct solar steam generation |
| CN103221756B (en) * | 2010-07-05 | 2016-05-25 | 玻点太阳能有限公司 | The direct generating steam of solar energy |
| CN103958127A (en) * | 2011-11-24 | 2014-07-30 | 乔治洛德方法研究和开发液化空气有限公司 | Device including plenum chamber and being used for dispensing jets of cryogenic fluid |
| CN104713384A (en) * | 2015-03-13 | 2015-06-17 | 芜湖凯博实业股份有限公司 | Cooling tower |
| CN106802107A (en) * | 2017-03-22 | 2017-06-06 | 山东农业大学 | A kind of vertical rotating sewage heat exchanger and its cleaning method |
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Open date: 20081112 |