CN1566892A - Horizontal column type heat exchanger exterior dirt three-phase fluidization in-situ cleaning process - Google Patents
Horizontal column type heat exchanger exterior dirt three-phase fluidization in-situ cleaning process Download PDFInfo
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- CN1566892A CN1566892A CN 03124544 CN03124544A CN1566892A CN 1566892 A CN1566892 A CN 1566892A CN 03124544 CN03124544 CN 03124544 CN 03124544 A CN03124544 A CN 03124544A CN 1566892 A CN1566892 A CN 1566892A
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Abstract
Disclosed is an outside dirt three-phase circulation fluidized cleaning technology for a horizontal tubular heat exchanger. An air distribution pipe on which a lot of oblique gas orifices are arranged is mounted at the bottom of a casing. Cleaning gas is discharged from top exhaust ports. The cleaning technology is rapid, uniform and pollution free.
Description
Technical field
Patent of the present invention relates to the outer dirt three-phase fluidization on-line cleaning technology of a kind of horizontal tubular heat exchanger pipe.This technology can be widely used in the periodicity on-line cleaning of the outer dirt of various tubular heat exchanger pipes.
Background technology
The present horizontal tubular heat exchanger that uses, shell side liquid can't carry out the machinery cleaning after the fouling outside pipe in running.Almost be single chemical cleaning method, but owing to structural reason, clean lack of homogeneity, effect is bad, and causes local corrosion easily.Therefore, manage outer dirt and can't in time clean and remove, operational efficiency descends gradually, worsens, even partial occlusion, and causing lost efficacy ahead of time scraps, and has a strong impact on service life.
Summary of the invention
Patent of the present invention is intended to solve the online Rapid Cleaning problem of the outer dirt of this horizontal tubular heat exchanger pipe, proposes the outer dirt three-phase fluidization on-line cleaning technology of a kind of horizontal tubular heat exchanger pipe.The characteristics of patent of the present invention are that horizontal tubular heat exchanger can clean by the three-phase circulating fluidization, the outer dirt of property performance period, online, quick, even removing pipe, reach the purpose that keeps long-term efficient operation, and keep basic structure constant, installation cost under the same load increases hardly, and cleaning charge is very cheap.
The technical scheme of patent of the present invention is:
Heat exchanger is by heat-transfer pipe, and housing, gas distribution pipe, exhaust outlet, overfall, upstream chamber, downstream chamber constitute.Housing bottom design has two gas distribution pipes, offers supply gas inclined hole or oblique nozzle on the gas distribution pipe, and the axial flow of the incline direction of inclined hole or nozzle and shell side liquid is to opposite.The solids that usefulness is cleaned in fluidization are equipped with in the bottom of shell side.The top design of housing has exhaust outlet.The top of housing, the height place that is substantially top heat-transfer pipe offers overfall.
When needing the outer dirt of scavenge pipe in the production run process, open half side air delivery valve, exhaust outlet and an overfall, close the shell side outlet valve.Under the drive of purge gas, shell side liquid and fluidization particle are with a large amount of bubble rising strenuous exercise, and to the liquid level by overfall control, gas and shell side liquid, fluidization separate particles are discharged through exhaust outlet.Shell side liquid and fluidization particle then descend by another half side circulation of not supplying gas, and realize circumferentially circulating of shell side.Liquid and fluidization particle are carried out the cleaning of tube outer surface dirt in crossing the violent process of flowing of tubulation.After treating that heat-transfer pipe cleans up substantially towards the front half cycle that circumferentially circulates, close this half side air delivery valve, open another half side air delivery valve, the circumferential circular flow that changes the three-phase fluidization washing fluid to.Like this result of exchange has solved the Fouling Cleaning non-uniformity problem of the tubulation front and back that unidirectional circular flow flings.In the cleaning process, the fluidization particle is simultaneously with the axial flow of shell side liquid moving to Way out progressively, but drop to the back, bottom by the gas loopback of jet inclined hole or nozzle ejection, the axial circulation in shell side that realizes the fluidization particle thus flows, and ensures the axial uniformity of the outer Fouling Cleaning of tubulation.Because the flow regime of three-phase fluidization cleaning fluid is very violent, the speed of Fouling Cleaning is fast, and the time is short, good uniformity, not only the heat exchange efficiency in the cleaning process can not descend, can strengthen rising to some extent on the contrary.Therefore, advantage online, quick, even cleaning that this heat exchanger has can the long-term of support equipment efficiently be moved.
Description of drawings
Fig. 1 is the outer dirt three-phase fluidization on-line cleaning technical schematic diagram of horizontal tubular heat exchanger pipe of the present invention.
Fig. 2 is the circumferential circulation three-phase fluidization on-line cleaning structure principle chart that the B-B among Fig. 1 analyses and observe amplification.
Fig. 3 is the air nozzle figure that amplification is analysed and observe by the A portion among Fig. 1.
Fig. 4 is the jet hole pattern that amplification is analysed and observe by the C portion among Fig. 2.
The specific embodiment
Specific embodiments below in conjunction with accompanying drawing 1, accompanying drawing 2, accompanying drawing 3 and accompanying drawing 4 explanations patent of the present invention:
1. housings, 2. heat-transfer pipes, 3. jet inclined hole 4. gas distribution pipes 5. rod baffle E 6. rod baffle F 7. particle axial circulation 8. tube side fluid imports 9. exhaust outlets 10. overfalls 11. shell side liquid outlets 12. tube side fluid among the figure export circumferentially dirty 19. pipe bridge maximum cross-section G-G, the 20. jet oblique mouth 21. shell side liquid-inlets of circulation of the upwards mobile 16. fluidization particles of 13. left half air delivery valve, 14. right half air delivery valve, 15. particles 17. gas-liquid separation faces 18.
When managing outer Fouling Cleaning in the running, open the right side half air delivery valve 14, exhaust outlet 9 and the overfall 10 of housing one side, close shell side liquid outlet 11.After the speed of G-G19 place, pipe bridge maximum cross-section purge gas surpasses the particle velocity movement value, purge gas is after jet inclined hole 3 enters the bottom of right half side shell side, be dispersed into a large amount of steam bubbles buoyance lift that makes progress and drive the shell side liquid strenuous exercise that makes progress, and drive fluidization particle 16 and upwards flow 15, bring to the gas-liquid separation face 17 by overfall 10 controls, purge gas is separated through exhaust outlet 9 and is discharged.16 on shell side liquid and fluidization particle pass through the circumferentially circulation dirty 18 of second half shell side.The liquid of strenuous exercise and fluidization particle 16 carry out Rapid Cleaning with the tube outer surface dirt when crossing heat-transfer pipe 2 outer walls and flow.After treating that heat-transfer pipe 2 cleans up substantially towards the front half cycle that circumferentially circulates, open second half a left side half air delivery valve 13, close right half air delivery valve 14 of this side, the circumferential circular flow that changes the three-phase fluidization washing fluid to.Exchange can be avoided the heat-transfer pipe 2 front half cycles that the circumferential circular flow of single direction flings and the inhomogeneities of back side half cycle Fouling Cleaning for washing and cleaning operation like this.In the cleaning process, fluidization particle 16 moves to shell side liquid outlet 11 directions step by step with the axial flow of shell side liquid simultaneously; But after dropping to the bottom, under the effect of the gas of jet inclined hole 3 or jet oblique mouth 20 ejections, fluidization particle 16 produces the loopback campaign to shell side liquid-inlet 21 directions, realized the particle axial circulation 6 of fluidization particle 16 thus, make fluidization particle 16 even all the time, ensure the axial uniformity of the outer Fouling Cleaning of heat-transfer pipe 2 pipes in shell side distribution vertically.Because the violent of three-phase fluidization cleaning fluid flows, on-line cleaning speed is fast, and the time is short, not only the heat exchange efficiency during cleaning can not descend, can strengthen better on the contrary.The shell side fluid pressure that purge gas need overcome is little, only needs low-pressure gas, and cleaning charge is very low.Therefore, this heat exchanger can reach the purpose that ensures long-term efficient operation by online, quick, even, economic periodic purge.
Gas distribution pipe 4 is in the bottom of housing 1, left and right sides symmetric arrays.Jet inclined hole 3 on the gas distribution pipe 4 or jet oblique mouth 20 can be divided into 1～5 row and arrange.Definite size of mainly looking housing 1 of concrete row's number, housing 1 is bigger, and row's number also the more be generally 2 row's arrangements, and the angle β between two rounds is generally 10 °～45 ° scopes.The oblique angle α of jet inclined hole 3 or jet oblique mouth 20 is 0 °～30 ° scopes, and the size of oblique angle α is by the axial velocity and the jet velocity decision of shell side liquid, 0 °～30 ° scopes.The aperture of jet inclined hole 3 or jet oblique mouth 20 is generally in 4mm～8mm scope, too little easy obstruction, and too conference causes that fluidization particle 16 pours in down a chimney and enters in the gas distribution pipe 2.The sum of jet inclined hole 3 or jet oblique mouth 20 calculates decision by jet velocity, and jet velocity is in the 10m/s-40m/s scope.
The number of exhaust outlet 9 is considered the diameter of housing 1 simultaneously mainly by the length decision of housing 1.For the little heat exchanger of housing 1 diameter, can be every about 1500mm one.The gross area of exhaust outlet 9 is calculated by exhaust velocity determines that exhaust velocity is not taken shell side liquid basically out of with discharge gas and is as the criterion, generally in 40m/s～80m/s scope.If shell side liquid can adopt higher exhaust velocity during for cooling water.
The axial location of overfall 10 is identical with shell side liquid outlet 11, efficiency of heat exchanger during with the assurance on-line cleaning; Its height and position is top identical with heat-transfer pipe 2 substantially.The arrangement position of top heat-transfer pipe 2 is the area size decisions that need according to gas-liquid separation liquid level 17.
Claims (5)
1. the outer dirt three-phase fluidization on-line cleaning technology of a horizontal tubular heat exchanger pipe, by heat-transfer pipe, housing, gas distribution pipe, exhaust outlet, overfall etc. are formed horizontal tubular heat exchanger.It is characterized in that the bottom is fixed with gas distribution pipe (4), gas distribution pipe (4) is provided with jet inclined hole (4) or jet oblique mouth (20), the bottom of housing (1) is equipped with and is cleaned with fluidization particle (16), and exhaust outlet (9) is arranged at the top of housing (1), and the top of housing (1) offers overfall (10).
2. the outer dirt three-phase fluidization on-line cleaning technology of horizontal tubular heat exchanger pipe according to claim 1, it is characterized in that fixing gas distribution pipe (4) the pipe number in bottom is 1～4, jet inclined hole (4) on the gas distribution pipe (4) or jet oblique mouth (20) all tilt to the direction of shell side liquid-inlet (21).
3. the outer dirt three-phase fluidization on-line cleaning technology of horizontal tubular heat exchanger pipe according to claim 1 is characterized in that at housing (1) top exhaust outlet (9) being arranged, and the number of exhaust outlet (9) is 1～6.
4. the outer dirt three-phase fluidization on-line cleaning technology of horizontal tubular heat exchanger pipe according to claim 1, it is characterized in that in the bottom of housing (1) the fluidization particle (16) that cleans usefulness being housed, fluidization particle (16) can be river sand, porcelain ball, glass marble, baton round, plastic pellet.
5. the outer dirt three-phase fluidization on-line cleaning technology of horizontal tubular heat exchanger pipe according to claim 1, it is characterized in that offering on the housing (1) overfall (10), its height exists together substantially mutually with the height of top heat-transfer pipe (2), and its axial location is identical substantially with shell side liquid outlet (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031245447A CN100354593C (en) | 2003-06-13 | 2003-06-13 | Horizontal column type heat exchanger exterior dirt three-phase fluidization in-situ cleaning process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031245447A CN100354593C (en) | 2003-06-13 | 2003-06-13 | Horizontal column type heat exchanger exterior dirt three-phase fluidization in-situ cleaning process |
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| Publication Number | Publication Date |
|---|---|
| CN1566892A true CN1566892A (en) | 2005-01-19 |
| CN100354593C CN100354593C (en) | 2007-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031245447A Expired - Fee Related CN100354593C (en) | 2003-06-13 | 2003-06-13 | Horizontal column type heat exchanger exterior dirt three-phase fluidization in-situ cleaning process |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1862213B (en) * | 2005-05-13 | 2010-05-12 | 湖南工业大学 | Gas jet pulse screw automatic washing type high-efficient heat transfer device |
| CN104667552A (en) * | 2015-03-13 | 2015-06-03 | 佛山市德嘉电力环保科技开发有限公司 | Evaporator with cleaning device |
| CN105056557A (en) * | 2015-07-24 | 2015-11-18 | 中山沃尔威多水处理设备有限公司 | Scale-preventing and clean-intensifying system and process applied to evaporator |
| CN109654912A (en) * | 2017-10-12 | 2019-04-19 | 中国石油化工股份有限公司 | Particle walks the horizontal type fluidized-bed heat exchanger of shell side |
| CN109748253A (en) * | 2018-12-19 | 2019-05-14 | 安徽节源环保科技有限公司 | A method of improving wet-process phosphoric acid concentration heat exchanger fouling |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4300625A (en) * | 1975-01-21 | 1981-11-17 | Mikhailov Gerold M | Preventing deposition on the inner surfaces of heat exchange apparatus |
| NL8102024A (en) * | 1981-04-24 | 1982-11-16 | Esmil Bv | FLUID HEAT EXCHANGER - FLUID HEAT EXCHANGE. |
| DE3213988A1 (en) * | 1982-04-16 | 1983-10-20 | L. & C. Steinmüller GmbH, 5270 Gummersbach | METHOD FOR CLEANING GAS FLOWED HEAT EXCHANGERS |
| NL8202096A (en) * | 1982-05-21 | 1983-12-16 | Esmil Bv | HEAT EXCHANGER CONTAINING A GRANULAR CONTAINING VERTICAL TUBES. |
| NL192055C (en) * | 1983-07-22 | 1997-01-07 | Eskla Bv | Device for operating physical and / or chemical processes, in particular a heat exchanger with circulation of granular mass. |
| CN2164008Y (en) * | 1993-03-10 | 1994-05-04 | 湘潭大学 | Horizontal finned tube heat exchanger |
| CN1098736C (en) * | 1996-06-25 | 2003-01-15 | 球技术能源有限公司 | Cleaning system for cleaning fluid-conveying pipeline |
-
2003
- 2003-06-13 CN CNB031245447A patent/CN100354593C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1862213B (en) * | 2005-05-13 | 2010-05-12 | 湖南工业大学 | Gas jet pulse screw automatic washing type high-efficient heat transfer device |
| CN104667552A (en) * | 2015-03-13 | 2015-06-03 | 佛山市德嘉电力环保科技开发有限公司 | Evaporator with cleaning device |
| CN105056557A (en) * | 2015-07-24 | 2015-11-18 | 中山沃尔威多水处理设备有限公司 | Scale-preventing and clean-intensifying system and process applied to evaporator |
| CN109654912A (en) * | 2017-10-12 | 2019-04-19 | 中国石油化工股份有限公司 | Particle walks the horizontal type fluidized-bed heat exchanger of shell side |
| CN109654912B (en) * | 2017-10-12 | 2020-08-07 | 中国石油化工股份有限公司 | Horizontal fluidized bed heat exchanger with particle shell pass |
| CN109748253A (en) * | 2018-12-19 | 2019-05-14 | 安徽节源环保科技有限公司 | A method of improving wet-process phosphoric acid concentration heat exchanger fouling |
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| Publication number | Publication date |
|---|---|
| CN100354593C (en) | 2007-12-12 |
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