CN1727834A - Airflow pulse technique for cleaning dirt inside tube of vertical type water-cooling equipment - Google Patents
Airflow pulse technique for cleaning dirt inside tube of vertical type water-cooling equipment Download PDFInfo
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- CN1727834A CN1727834A CN 200410046610 CN200410046610A CN1727834A CN 1727834 A CN1727834 A CN 1727834A CN 200410046610 CN200410046610 CN 200410046610 CN 200410046610 A CN200410046610 A CN 200410046610A CN 1727834 A CN1727834 A CN 1727834A
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- water cooling
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Abstract
The present invention relates to a vertical water-cooled equipment tube scale airflow pulsation cleaning technique. In the water-cooled tube the cleaning granules or cleaning brush is placed, the tube orifices of two ends of said water-cooled tube are covered with tube orifice covers, in the inlet bottom chamber a rotary jet tube capable of producing pulsation airflow is placed, and its rotation period can be regulated by means of speed-regulating board, and the rotary jet tube is rotated per cycle, the jetted cleaning gas can drive the cleaning element in the water-cooled tube and can make said cleaning element be severely up-down reciprocally cleaned once so as to attain the goal of quickly cleaning tube scale.
Description
Technical field
Patent of the present invention relates to dirt air-flow pulse cleaning technique in the vertical water cooling equipment pipe.The vertical water cooler of this structure can be widely used in vertical water cooler and other vertical water cooling equipment of freezing unit.
Background technology
The cooling water of the vertical water cooler of traditional structure flows in pipe from top to bottom, and mean flow rate is low, and the water distribution of each pipe is very inhomogeneous, fouling easily again, and cooling effectiveness is generally very low, ice maker unit operation energy consumption height.
Prevent and treat the way of incrustation scale in the vertical water-cooled organ pipe, many employing pipe cleaners and giant and jet thereof, the easy scratch inside pipe wall of pipe cleaner, the cleannes of giant scale removal are not high, the cost of jet is too high, and three's washing and cleaning operation all labour intensity is big.One of more advanced technology is a pipe inside spin automatic cleaning technology.According to paper (Zhou Li etc., vertical water cooler dirt cleans the tie Study on Structure Optimizing automatically, University Of Xiangtan's natural science journal, 2001,23 (1): 88-90) report, adopt the result of use of smooth twisted strip of little torque good, can be under low flow velocity the dirt in the scavenge pipe automatically, can improve heat transfer coefficient 27.5% again.But find in the long-time running that two problems still fail further to be solved: because the water distribution of each pipe is very inhomogeneous, have a certain proportion of water cooling tube because of the water yield very little twisted strip can not rotate; Mouth of pipe bearing wear is too fast, and reliability is not enough, and expense is higher.Two of more advanced technology is circulating fluidization heat exchanger technologies in the tube side, for example patent EP262725 and Chinese patent ZL91106682.9, according to paper (Yu Xiumin, circulating fluidization high-performance heat exchanger research in the tube side, 1996, University Of Xiangtan's natural science journal, 1996,18 (1): 82-85) Bao Dao technology result of use is fine really, and the dirt in the scavenge pipe automatically can improve the cooling condensation ability of equipment again significantly.But, after the several years operation, aspect reliability, expose two problems: the one, fluidized grain outside the downstream chamber goes to equipment, causes the loss of fluidized grain, when especially flow fluctuates widely easily; The 2nd, the sieve aperture of the sieve plate little by little particle of accumulation property stops up.
Summary of the invention
Patent of the present invention is intended to solve better the defective of Fouling Cleaning prior art in the vertical water-cooled organ pipe, dirt air-flow pulse cleaning technique in a kind of vertical water cooling equipment pipe is proposed, the rotary pulsed air-flow that produces by the rotary jet pipe drives pumping of cleaning element in the vertical water cooling tube, realize the Rapid Cleaning of incrustation scale in the pipe, reach the purpose that significantly improves operational efficiency, and body construction remains unchanged, and manufacturing expense seldom increases, and cleaning charge is very cheap.
The technical scheme of patent of the present invention is:
Dirt air-flow pulse cleaning technique in the vertical water cooling equipment pipe, its vertical water cooling equipment is made of water cooling tube, housing, bottom compartment, cleaning element, air bound plate, rotary jet pipe, speed adjusting plate etc.Place a certain amount of cleaning element in the every water cooling tube, mouth of pipe cover all is equipped with at two ends up and down, and cleaning element is remained in each water cooling tube.Cleaning element can be the solid particle of spheroidal, elliposoidal or other shape, also can be cleaning brush.But, no matter cleaning particle or cleaning brush, the maximum gauge in its cross section all requires significantly less than the water cooling tube internal diameter, and the diameter of its smallest cross-sectional all must be greater than the mesh size of water cooling tube mouth of pipe cover.Cleaning element sinking speed must be greater than the speed of the cooling water in the water-cooled organ pipe.Be provided with that rotating speed can be regulated, as to produce air pulse rotary jet pipe in the import bottom compartment.Speed adjusting plate of installing on the rotary jet pipe and the angle between the vertical plane can change by positioning screw and location orifice plate.The pulse period of air-flow can significantly change its rotational resistance by the angle that changes between speed adjusting plate and the vertical plane, the purpose that regulate performance period.
During production run, cooling water is from bottom to top with speed u slowly
1Upwards, be markedly inferior to the free-falling velocity u of cleaning element in cooling water
3, so cleaning element all rests in the mouth of pipe cover of lower end.When incrustation scale need clean in the pipe, open intake valve, air jet pipe is jet, by jet propulsive thrust effect rotation automatically lentamente.The gas of ejection floats to the space that the air bound plate is cut apart on rapidly, through the buoyance lift motion that makes progress of this regional water cooling tube.At one time, these are little by little increased by the bubble volume in the jet water cooling tube of air jet pipe, and other is not subjected to forming between the jet most of water cooling tubes of air jet pipe the linker with very big differential static pressure.Under the effect of this big differential static pressure, these are subjected to the air-water mixture in the jet water cooling tube of air jet pipe to produce stream fast, its speed u
2Significantly greater than the free-falling velocity u of cleaning element in cooling water
3, drive cleaning element and move upward together.Because in the flow process of solution-air two-phase mixture, bubble stirs very violent with respect to the buoyance lift motion of cooling water to water, it is the compound movement that fluctuation is arranged, rotation is arranged that cleaning element moves upward, with water cooling tube inwall collision friction continually, can quickly and efficiently the Fouling Cleaning of inside pipe wall be removed.Cleaning element moves to the upper end of water cooling tube and is lived by mouth of pipe cover shelves, and the liquid level that purge gas floats in the downstream chamber drains into atmosphere.After these water cooling tubes are left in the air jet pipe rotation, no longer include gas in these water cooling tubes, be returned to low flow velocity u again
1, be markedly inferior to the free-falling velocity u of cleaning element under the gravity effect
3, at the cleaning element of water cooling tube upper pipes mouth mask with (u
3-u
1) speed sink up to the mouth of pipe cover of lower end.Therefore, the rotary jet pipe whenever rotates a circle, and the cleaning element in each water cooling tube just pumps in water cooling tube, to the Fouling Cleaning of water cooling tube inwall once.So repeat, can clean the incrustation scale in the water cooling tube completely soon.Speed adjusting plate of installing on the rotary jet pipe and the angle between the vertical plane can change by positioning screw and location orifice plate through hand hole, increase significantly or lower its rotational resistance with this, reach the purpose of regulating the air-flow pulse period.
Therefore, the vertical water cooler of this structure not only can be implemented in line and cleans, and cleaning speed is fast.The shell side fluid pressure that purge gas need overcome is little, only needs the low pressure gas body source.Scavenging period is short, and the consumption of purge gas is few, and power cost is cheap.By periodic cleaning, can in time remove the inside pipe wall dirt, the efficient operation that support equipment is long-term.
Description of drawings
The structure principle chart of dirt air-flow pulse cleaning technique in the vertical water cooling equipment pipe of Fig. 1
Fig. 2 air bound plate structure A-A profile
Fig. 3 air jet pipe speed regulating structure principle (B to) schematic diagram
Among the figure: 1. downstream chamber's 2 mouth of pipe covers 3. housings 4. water cooling tubes 5. cleaning brush 6. clean particle 7 air bound plates 8 bottom compartments 9 rotary jet pipes, 10 air inlet pipe, 11 air gauges, 12 air valves, 13 speed adjusting plates, 14 hand holes, 15 positioning screws, 16 location orifice plate 17 dead axles
The specific embodiment
Specific embodiments below in conjunction with accompanying drawing 1 explanation patent of the present invention:
Dirt air-flow pulse cleaning technique in the vertical water cooling equipment pipe is placed cleaning brush 5 or is cleaned particle 6 every water cooling tube 4 in, cleaning particle 6 can be spheroidal or elliposoidal, also can be the thick solid particle of other shape.Cleaning brush 5 or the density p of cleaning particle 6
sMust be greater than the density p of cooling water
w, its ratio (ρ
s/ ρ
w) in 1.3～2.6 scopes.Cleaning element is at the free-falling velocity u of cooling water
3Must be higher than the cooling water flow velocity u in the water cooling tube 4 significantly
1Cleaning brush 5 or cleaning particle 6 can adopt the engineering plastics manufacturing, and for example nylon is not only corrosion-resistant, ageing-resistant, and can make the cleaning element of transferring different densities as required.Cleaning brush 5 or the maximum diameter d of cleaning particle 6 cross sections
MaxMust be less than the inside diameter D of water cooling tube 4, ratio (d
Max/ D) below 0.85.Mouth of pipe cover 2 all is equipped with at the two ends up and down of water cooling tube 4.The area of space that 8 top is not interconnected by air bound plate 7 level that is divided in the bottom compartment.The center of bottom compartment 8 is equipped with rotary jet pipe 9.
During production run, cooling water is from bottom to top with speed u slowly
1By water cooling tube 4, be markedly inferior to cleaning brush 5 or clean the free-falling velocity u of particle 6 in cooling water
3, so cleaning brush 5 or clean mouth of pipe cover 2 the insides that particle 6 all rests on water cooling tube 4 lower ends.When the incrustation scale in the water cooling tube 4 need clean, open air valve 12, to regulate air pressure and make air gauge 11 reach a predetermined value, rotary jet pipe 9 is normally jet, by jet propulsive thrust effect rotation automatically lentamente.Float to the space that air bound plate 7 is cut apart on the gas of ejection, through this upwards buoyance lift motion of regional water cooling tube 4.At one time, these are little by little increased by the bubble volumes in the jet water cooling tube of rotary jet pipe 94, and other is not subjected to forming the linker with very big differential static pressure between the jet most of water cooling tubes 4 of rotary jet pipe 9.Under the effect of this big differential static pressure, these are subjected to rotary jet pipe 9 jet water cooling tube 4 interior air-water mixtures to produce quick stream upwards, its speed u
2Significantly greater than cleaning brush 5 or clean the free-falling velocity u of particle 6 in cooling water
3, drive cleaning brush 5 or cleaning particle 6 move upward together.Because in the flow process of solution-air two-phase mixture, bubble stirs very violent with respect to the buoyance lift motion of cooling water to water, cleaning brush 5 or the compound movement of cleaning particle 6 be fluctuation, rotation, continually with water cooling tube inwall collision friction, can quickly and efficiently the Fouling Cleaning of water cooling tube 4 inwalls be removed.Cleaning brush 5 or clean the upper end that particle 6 moves to water cooling tube 4 and lived for 2 grades by mouth of pipe cover, purge gas float in the downstream chamber 1 liquid level and drain into atmosphere.After these water cooling tubes 4 are left in the rotation of rotary jet pipe, no longer include gas in these water cooling tubes 4, cooling water is returned to low flow velocity u again
1, be markedly inferior to cleaning brush 5 or clean the free-falling velocity u of particle 6 under the gravity effect
3, at the cleaning brush 5 of water cooling tube 4 upper pipes mouth masks 2 or clean particle 6 with (u
3-u
1) speed sink up to the mouth of pipe cover 2 of lower end.Therefore, rotary jet pipe 9 whenever rotates a circle, the cleaning brush 5 in each water cooling tube 4 or clean particles 6 and just in water cooling tube, pump once, to the Fouling Cleaning of water cooling tube 4 inwalls once.So repeated several times just can be cleaned the incrustation scale in the water cooling tube 4 completely about half an hour.Obviously, the cycle of air pulse must be greater than the swing circle of rotary jet pipe 9.If the rotary speed of rotary jet pipe 9 is too fast or too slow, during less than regulating cycle, can increase or lower its rotational resistance through hand hole 14 by the angle between positioning screw 15 and location orifice plate 16 change speed adjusting plates 13 and the vertical plane, reach the purpose of regulating the air-flow pulse period.
Example 1, test in the vertical carbon steel pipe water cooler of Φ 25 * 2.5 * 5000, diameter 13.7mm, the density 1100Kg/m of cleaning particle 6
3, the average speed that cleaning particle 6 moves upward reaches 1.71m/s, and the average speed that moves downward is 0.23m/s.Clean 6 each about 2.6 seconds of washing motion times once up and down reciprocatingly of particle, water cooling tube 4 every each purge gas consumptions are 2.80 * 10
-4m
3Adorning 5 in every water cooling tube 4 cleans particles 6, the cooling water flow velocity fluid resistance when 0.05m/s～0.32m/s and has only 120Pa～1080Pa; Adorning 10 in every water cooling tube 4 cleans particles 6, the cooling water flow velocity fluid resistance when 0.05m/s～0.32m/s and has only 150Pa～1710Pa.
For film-cooled heat 200m
2Vertical water cooler, only need 72m by the gas usage of this calculating
3About/h; The pressure of purge gas requires also very low, and 60Kpa is above just enough, about 1 yuan of power consumption expense.Therefore, the vertical water cooler of this new construction not only can be implemented in line and cleans, and cleaning speed is fast.The shell side fluid pressure that purge gas need overcome is little, only needs the low pressure gas body source.Easy and simple to handle, scavenging period is short, the consumption of purge gas seldom, expense is very cheap.By periodic cleaning, in time remove dirt in the pipe, the efficient operation that support equipment is long-term.
Claims (4)
1. dirt air-flow pulse cleaning technique in the vertical water cooling equipment pipe, by water cooling tube (4), the vertical water cooling equipment that housing (3), bottom compartment (8), air bound plate (7), rotary jet pipe (9), speed adjusting plate (13) etc. constitute, it is characterized in that being placed with in the water cooling tube (4) cleaning brush (5) or clean particle (6), mouth of pipe cover (2) is equipped with at two ends up and down, be provided with rotary jet pipe (6) in the bottom compartment (8), rotary jet pipe (9) is gone up the speed adjusting plate (13) of installation and the angle between the vertical plane can be rotated adjusting.
2. dirt air-flow pulse cleaning technique in the vertical water cooling equipment pipe according to claim 1 is characterized in that rotary jet pipe (9) is gone up the speed adjusting plate of installing (13) and the angle between the vertical plane can pass through positioning screw (15) and location orifice plate (16) changes.
3. dirt air-flow pulse cleaning technique in the vertical water cooling equipment pipe according to claim 1, it is characterized in that cleaning particle (6) can be the solid particle of spheroidal, elliposoidal or other shape, and the minimum diameter in its cross section must be greater than the mesh size of the mouth of pipe cover (2) of water cooling tube (4).
4. dirt air-flow pulse cleaning technique in the vertical water cooling equipment pipe according to claim 1 is characterized in that cleaning brush (5), requires the maximum diameter d in its cross section
MaxSignificantly less than the inside diameter D of water cooling tube (4), its ratio (d
Max/ D) less than 0.85.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100466101A CN100376858C (en) | 2004-07-30 | 2004-07-30 | Airflow pulse technique for cleaning dirt inside tube of vertical type water-cooling equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100466101A CN100376858C (en) | 2004-07-30 | 2004-07-30 | Airflow pulse technique for cleaning dirt inside tube of vertical type water-cooling equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1727834A true CN1727834A (en) | 2006-02-01 |
| CN100376858C CN100376858C (en) | 2008-03-26 |
Family
ID=35927236
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100466101A Expired - Fee Related CN100376858C (en) | 2004-07-30 | 2004-07-30 | Airflow pulse technique for cleaning dirt inside tube of vertical type water-cooling equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101879512A (en) * | 2009-05-05 | 2010-11-10 | 李文忠 | Gas pulsed generator, online scale removal method and system through gas pulse |
| CN105737619A (en) * | 2014-12-12 | 2016-07-06 | 沈阳铝镁设计研究院有限公司 | Online cleaning method for scars of direct heat exchanger for flue gas waste heat utilization of aluminum oxide roasting furnace |
| CN109556447A (en) * | 2017-09-26 | 2019-04-02 | 北京奥博水处理有限责任公司 | Self-cleaning heat exchanger |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61195295A (en) * | 1985-02-22 | 1986-08-29 | Mitsubishi Heavy Ind Ltd | Regenerative rotary type air preheater with dust removing function |
| CN2223474Y (en) * | 1994-11-25 | 1996-03-27 | 吕志元 | Automatic rotary screw descaling spoiler tube type heat exchanger |
| FI20010162A0 (en) * | 2001-01-26 | 2001-01-26 | Timo Juhani Vanhatalo | Method and apparatus for cleaning pipes in a heat exchanger |
| CN2580386Y (en) * | 2002-09-28 | 2003-10-15 | 倪永刚 | On-line automatic cleaning device for condensator heat exchange tube inner wall |
| CN1485594A (en) * | 2002-09-28 | 2004-03-31 | 平 陈 | Condenser automatic flushing device |
-
2004
- 2004-07-30 CN CNB2004100466101A patent/CN100376858C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101879512A (en) * | 2009-05-05 | 2010-11-10 | 李文忠 | Gas pulsed generator, online scale removal method and system through gas pulse |
| CN101879512B (en) * | 2009-05-05 | 2014-06-18 | 李文忠 | Gas pulsed generator, online scale removal method and system through gas pulse |
| CN105737619A (en) * | 2014-12-12 | 2016-07-06 | 沈阳铝镁设计研究院有限公司 | Online cleaning method for scars of direct heat exchanger for flue gas waste heat utilization of aluminum oxide roasting furnace |
| CN109556447A (en) * | 2017-09-26 | 2019-04-02 | 北京奥博水处理有限责任公司 | Self-cleaning heat exchanger |
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| Publication number | Publication date |
|---|---|
| CN100376858C (en) | 2008-03-26 |
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