CN2786539Y - Blast air self-rotating impulse auto-cleaning type low flowing speed highly-efficient heat exchanger - Google Patents
Blast air self-rotating impulse auto-cleaning type low flowing speed highly-efficient heat exchanger Download PDFInfo
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- CN2786539Y CN2786539Y CN 200520050707 CN200520050707U CN2786539Y CN 2786539 Y CN2786539 Y CN 2786539Y CN 200520050707 CN200520050707 CN 200520050707 CN 200520050707 U CN200520050707 U CN 200520050707U CN 2786539 Y CN2786539 Y CN 2786539Y
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Abstract
The utility model relates to a blast air self-rotating impulse auto-cleaning type low flowing speed highly-efficient heat exchanger which comprises heat-transfer pipes, pipe masks, a plastic skewed tooth spiral twisting belt or a steel wire screw, a housing, a bottom chamber, a partition board, a rotating gas nozzle, a speed regulating plate, etc., wherein the plastic skewed tooth spiral twisting belt or the steel wire screw is arranged in each heat-transfer pipe, and both ends of each heat-transfer pipe is provided with the pipe masks. The convection heat exchange in the pipes is strengthened in a highly-efficient mode by the plastic skewed tooth spiral twisting belt or the steel wire screw when the utility model is operated. The gas nozzle which is automatically rotated by the reaction force of blast air is arranged in an inlet bottom chamber, and the gas nozzle provides impulse air flow for all heat-transfer pipes when the gas nozzle is rotated one circle. The mixture of the impulse air flow and liquid drives the plastic skewed tooth spiral twisting belt or the steel wire screw to acutely move up and down so as to achieve on-line and quick cleaning. The heat exchanger has the advantages of simple structure, convenient operation and low cost for cleaning, and always keeps highly efficient running. Compared with the traditional structural low flowing speed heat exchanger, and the coefficient ai of the convection heat exchange in the inner side of each of the pipes is enhanced by more than one times.
Description
Technical field
The utility model patent relates to the low flow velocity high-performance heat exchanger of jet rotation pulse screw automatic washing type.The low flow velocity high-performance heat exchanger of this jet rotation pulse screw automatic washing type structure can be widely used in interior water-cooled other vertical shell-and-tube heat exchanger of vertical water cooler, pipe such as freezing unit.
Background technology
The vertical shell-and-tube heat exchanger of traditional structure, the velocity in pipes that quite a lot of equipment is arranged are below 0.2m/s, and not only convective heat-transfer coefficient is very low, and fouling easily, and operational efficiency is very low.Especially the open type equipment that in pipe, flows from top to bottom of cooling water, the cooling water inflow that adds each pipe distributes very inhomogeneous again, and operational efficiency is very low especially.
This low pitot tube shell heat exchanger dirt of growing easily can't be adopted by the restriction of low flow velocity again and relatively effectively cleans preventing fouling automatically.For example, above (the fluid dynamic plastic cladding helix of dirt on-line auto-cleaning in the heat-transfer pipe of plastic cladding helix specification requirement flow velocity 0.4m/s, 2005.2.23., ZH2004200351029), helical teeth twisted strip specification requirement flow velocity 0.35m/s is above, and (rotation type cleans and heat conduction reinforced twisted strip with oblique teeth in a kind of pipe, 2004.3.31., CN1485596A), above (the vertical heat-transfer equipment of circulating fluidization in a kind of two covers of the board-like circulating fluidization specification requirement of bubble-cap flow velocity 0.2m/s, 2005.119., ZH2003201142083).Therefore, the cleaning of can only periodically stopping of the dirt in the low flow velocity heat-transfer pipe.Because dirt can not in time be removed, operational efficiency is low, and because dirt is heat conduction reinforced governing factor in the heat-transfer pipe, therefore before low flow velocity on-line auto-cleaning problem did not achieve a solution, general heat exchanger did not consider to adopt heat-transfer pipe interpolation thing realization convection heat transfer' heat-transfer by convection to strengthen.Moreover stop and clean great majority employing mechanical cleaning method, heat conduction reinforced heat-transfer pipe interpolation thing can make machinery clean and bring inconvenience even sizable difficulty is arranged.
Summary of the invention
The utility model patent is intended to solve the on-line auto-cleaning problem of dirt in the low flow velocity vertical shell-and-tube heat exchanger heat-transfer pipe, the low flow velocity convection heat transfer' heat-transfer by convection that solves simultaneously again in the heat-transfer pipe is strengthened problem, propose the low flow velocity high-performance heat exchanger of a kind of jet rotation pulse screw automatic washing type, make efficient reinforcement of convection heat transfer' heat-transfer by convection realization of production period by the screw element of interpolation in the heat-transfer pipe; When needing in the scavenge pipe dirt, the rotary pulsed air-flow that produces by the air jet pipe rotation drives pumping of interpolation screw element in the vertical heat-transfer pipe, realizes the online Rapid Cleaning of incrustation scale in the pipe.Therefore, operational efficiency is increased exponentially, keep body basic structure constant again, manufacturing expense increases few, and cleaning operation is easy, expense is cheap.
The technical scheme of the utility model patent is:
Jet rotation pulse screw automatic washing type hangs down the flow velocity high-performance heat exchanger, is made of heat-transfer pipe, mouth of pipe cover, plastics helical teeth twisted strip or steel wire spiral, housing, bottom compartment, dividing plate, air jet pipe, rotational speed regulation flaps etc.Every interior plastics helical teeth twisted strip or the steel wire spiral of placing a suitable length of heat-transfer pipe, heat-transfer pipe all is equipped with mouth of pipe cover in two ends up and down.The external diameter of plastics helical teeth twisted strip or steel wire spiral all significantly less than the internal diameter of heat-transfer pipe and mouth of pipe cover, can move back and forth freely; Must can not run out of outside the mouth of pipe cover of heat-transfer pipe significantly greater than the mesh size of mouth of pipe cover or the channel width between the gusset again simultaneously, plastics helical teeth twisted strip or steel wire spiral are remained in each heat-transfer pipe.The flow velocity that liquid in pipe made progress when the sinking speed of plastics helical teeth twisted strip or steel wire spiral all must normally be moved greater than heat exchanger.Import is provided with air jet pipe in the bottom compartment, by the jet reaction rotation of air jet pipe.Air jet pipe is every provides a pulse purge flow just for all heat-transfer pipes from circling, and plastics helical teeth twisted strip or steel wire spiral is pumped clean once.The rotational speed regulation flaps is installed on the air jet pipe, and the angle between rotational speed regulation flaps and the horizontal cross-section can change, and with this rotational resistance that changes air jet pipe, reaches the purpose of regulating the air-flow pulse cleaning frequency.
During production run, liquid in pipe slowly flows from bottom to top, and its flow velocity is markedly inferior to the sinking speed of plastics helical teeth twisted strip or steel wire spiral, so plastics helical teeth twisted strip or steel wire spiral can rest in the mouth of pipe cover of lower end all the time.Linear flow is moving in the shape of a spiral because liquid in pipe is subjected to the guide functions of plastics helical teeth twisted strip or steel wire spiral, in helix process of flowing forward, constantly be subjected to the periodic flow-disturbing of the steel wire of the helical teeth of plastics helical teeth twisted strip or steel wire spiral again, make the convection heat transfer' heat-transfer by convection process be able to efficient reinforcement.Plastics helical teeth twisted strip and steel wire spiral can make the convective heat-transfer coefficient α of heat-transfer pipe inboard
iImprove 100% respectively, more than 25%.
When operation needs in the scavenge pipe dirt after a period of time, open intake valve, air jet pipe is jet, rotates automatically by jet propulsive thrust effect.Float in the air chamber of being cut apart by dividing plate on the gas of ejection, mix with liquid upwards via the heat-transfer pipe above this air chamber and flow, the bubble volume in these heat-transfer pipes little by little increases.At one time, and be not subjected to constituting between other jet most of heat-transfer pipes of air jet pipe linker with very big differential static pressure.Under the effect of this big differential static pressure, these are subjected to interior gas-liquid mixture of heat-transfer pipe of the jet air chamber top of air jet pipe to produce quick stream upwards, its speed is the sinking speed in liquid in pipe much larger than plastics helical teeth twisted strip or steel wire spiral, drives plastics helical teeth twisted strip or steel wire spiral fast rotational and moves upward with fast speeds together.In the two phase flow flow process of gas-liquid mixture, bubble is violent for the stirring of cooling water, therefore to move upward be the compound movement that fluctuation is arranged, rotation is arranged for plastics helical teeth twisted strip or steel wire spiral, with heat-transfer pipe inwall collision friction continually, can be fast, equably the Fouling Cleaning of inside pipe wall is removed.Plastics helical teeth twisted strip or steel wire screw are lived by mouth of pipe cover shelves to the upper end of heat-transfer pipe, and purge gas floats to the liquid level in the downstream chamber, are discharged to outside the heat exchanger through exhaust-valve.After this air chamber is left in the air jet pipe rotation, no longer include gas in these heat-transfer pipes and supply with, revert to the low flow velocity of original liquid again and upwards flow, plastics helical teeth twisted strip or the sedimentation under the gravity effect of steel wire spiral are sunk up to the mouth of pipe cover of heat-transfer pipe lower end.Therefore, air jet pipe whenever rotates a circle, and plastics helical teeth twisted strip or steel wire spiral in all heat-transfer pipes of heat exchanger all pump once, to the Fouling Cleaning of heat-transfer pipe inwall once.Continuation rotation along with air jet pipe so repeats, and can clean the incrustation scale in the heat-transfer pipe completely soon.Stop air feed then, be returned to normal operating condition.Rotational speed regulation flaps of installing on the air jet pipe and the angle of inclination between the horizontal cross-section can be regulated through hand hole and change, with this rotational resistance that increases or lower air jet pipe significantly, reach the rotation period of adjusting air jet pipe and the purpose of gasflow clean-up pulse period.Can adopt plastics helical teeth twisted strip for general dirt; If dirt is very hard, be difficult in cleaning or the heat-transfer pipe is high-temp liquid, then can adopt the steel wire spiral.
Therefore, jet rotation pulse screw automatic washing type hangs down the flow velocity high-performance heat exchanger, not only can realize the efficient reinforcement of convection heat transfer' heat-transfer by convection in the low flow velocity heat-transfer pipe, can realize the online Rapid Cleaning of dirt in the heat-transfer pipe again, in time remove the inside pipe wall dirt, the efficient operation that support equipment is long-term.And cleaning operation is easy, the shell side fluid pressure that only needs the low pressure gas body source to overcome, and scavenging period is short, and the consumption of purge gas is few, and cleaning charge is with cheap.
Description of drawings
The structure principle chart of the low flow velocity high-performance heat exchanger of the jet rotation pulse screw automatic washing type of Fig. 1
Fig. 2 plastics helical teeth twisted strip schematic diagram
The diaphragm structure of Fig. 3 A-A profile
Among the figure: 1. air bleeding valve 2 downstream chambers 3 mouth of pipe covers, 4. heat-transfer pipes, 5 steel wire spirals 6. plastics helical teeth twisted strips 7 dividing plates, 8 bottom compartments 9 air jet pipes, 10 air inlet pipe, 11 supply gas pressure table 12 intake valves, 13 rotational speed regulation flaps, 14 hand holes, 15 housings, 16 helical teeth, 17 air chambers, 18 centers
The specific embodiment
Below in conjunction with accompanying drawing 1, accompanying drawing 2, accompanying drawing 3, the specific embodiments of the utility model patent is described:
Jet rotation pulse screw automatic washing type hangs down the flow velocity high-performance heat exchanger, places steel wire spiral 5 or plastics helical teeth twisted strip 6 in every heat-transfer pipe 4.Steel wire spiral 5 or plastics helical teeth twisted strip 6 must be higher than the flow velocity that liquid makes progress in the heat-transfer pipe 4 significantly in the sinking speed of liquid in pipe.The maximum outside diameter d of steel wire spiral 5 or plastics helical teeth twisted strip 6 must be less than the inside diameter D of heat-transfer pipe 4, and ratio (d/D) is below 0.95.Mouth of pipe cover 3 all is equipped with at the two ends up and down of heat-transfer pipe 4.The center of bottom compartment 8 is equipped with air jet pipe 9.Rotational speed regulation flaps 13 is installed on the air jet pipe 9, and the angle between rotational speed regulation flaps 13 and the horizontal cross-section can change, and with this rotational resistance that changes air jet pipe, reaches the purpose of regulating the air-flow pulse cleaning frequency.
During production run, liquid from bottom to top with speed slowly by heat-transfer pipe 4, be markedly inferior to the free-falling velocity of steel wire spiral 5 or plastics helical teeth twisted strip 6, so steel wire spiral 5 or plastics helical teeth twisted strip 6 all rest on mouth of pipe cover 3 the insides of heat-transfer pipe 4 lower ends.Steel wire spiral 5 or plastics helical teeth twisted strip 6 are as the reinforced element of convection heat transfer' heat-transfer by convection in the pipe.Linear flow is moving in the shape of a spiral because liquid in pipe is subjected to the guide functions of steel wire spiral 5 or plastics helical teeth twisted strip 6, helix liquid stream constantly is subjected to the steel wire of steel wire spiral 5 again in process of flowing forward or the helical teeth of plastics helical teeth twisted strip 6 periodically stops flow-disturbing, so the convection heat transfer' heat-transfer by convection process obtains highly effective reinforcement.Test shows that the steel wire 5 of plastics helical teeth twisted strip 6 and steel wire spiral can make the convective heat-transfer coefficient α of heat-transfer pipe 4 inboards
iImprove 100% respectively, more than 25%.
When the dirt in the heat-transfer pipe 4 need clean, open intake valve 12, be adjusted to after fumarole place hydrostatic of the air jet pipe 9 that supply gas pressure table 11 surpasses a little, air jet pipe 9 is normally jet, by jet reaction thrust air jet pipe 9 is rotated automatically.The gas come-up of ejection enters into the air chamber of being cut apart by dividing plate 7 17, and the heat-transfer pipe 4 through these air chamber 17 tops mixes upwards mobile with liquid, and the bubble volume total amounts in these heat-transfer pipes 4 little by little increase.At one time, and be not subjected to constituting linker between other jet most of heat-transfer pipes 4 of air jet pipe 9 with very big differential static pressure.Under the effect of this big differential static pressure, these are subjected to the solution-airmixtures in the heat-transfer pipe 4 of jet air chamber 17 tops of air jet pipe 9 to produce quick stream upwards, its speed is the sinking speed in the liquid in heat-transfer pipe 4 much larger than plastics helical teeth twisted strip 6 or steel wire spiral 5, drives plastics helical teeth twisted strip 6 or steel wire spiral 5 fast rotational and moves upward with fast speeds together.In the two phase flow flow process of solution-airmixture, bubble is violent for the stirring of cooling water, therefore to move upward be existing fluctuation, again the compound movement of rotation arranged for plastics helical teeth twisted strip 6 or steel wire spiral 5, with heat-transfer pipe 4 inwalls collision friction continually, so can be fast, equably the Fouling Cleaning of heat-transfer pipe 4 inwalls is removed.Plastics helical teeth twisted strip 6 or steel wire spiral 5 move to the upper end of heat-transfer pipe 4 and are lived for 3 grades by mouth of pipe cover, and purge gas floats to the liquid level of downstream chamber, is discharged to outside the heat exchanger through air bleeding valve 1.After this air chamber 17 is left in air jet pipe 9 rotations, no longer including gas in these heat-transfer pipes 4 supplies with, revert to the low flow velocity of original liquid again and upwards flow, plastics helical teeth twisted strip 6 or steel wire spiral 5 sink up to the mouth of pipe cover 3 of heat-transfer pipe 4 lower ends at gravity effect sinking reduction of speed.Therefore, air jet pipe 9 whenever rotates a circle, and plastics helical teeth twisted strip 6 or steel wire spirals 5 in all heat-transfer pipes of heat exchanger 4 all pump once, to the Fouling Cleaning of heat-transfer pipe 4 inwalls once.Along with the continuation rotation of air jet pipe 9, constantly move back and forth and clean, generally up and down reciprocatingly just the incrustation scale in the heat-transfer pipe 4 can be cleaned up about 40 times, finish to clean, stop air feed, be returned to normal operating condition.
When the dirt in the heat-transfer pipe is hard scale or high-temperature medium, steel wire spiral 5 is set in the heat-transfer pipe 4.When the dirt in the heat-transfer pipe is soft dirt and fluid temperature when not high, plastics helical teeth twisted strip 6 is set in the heat-transfer pipe 4.The length of steel wire spiral 5 or plastics helical teeth twisted strip 6 is all than heat-transfer pipe 4 little a certain appropriate value h
1h
1Value is more than 100mm, by the coverage size decision of the heat conduction reinforced influence in steel wire spiral 5 or 6 pairs of downstreams of plastics helical teeth twisted strip.So both can make the convection heat transfer' heat-transfer by convection of whole heat-transfer pipe 4 length directions efficiently strengthen the reciprocating motion stroke H that steel wire spiral 5 or plastics helical teeth twisted strip 6 are necessary all when pulse is cleaned.If reciprocating stroke H is too little, then cleaning speed is low.
No matter the structure of mouth of pipe cover 3 is gusset type structure or mesh type, it is tubular to be the garden, and internal diameter is all greater than the external diameter of steel wire spiral 5 or plastics helical teeth twisted strip 6, so that steel wire spiral 5 or plastics helical teeth twisted strip 6 both can be deposited to the end of mouth of pipe cover 3, also can ascending motion to the top of mouth of pipe cover 3, make the height h of mouth of pipe cover 3
2All become a part that moves back and forth cleaning stroke H, improve cleaning efficiency with this.The mesh size of mouth of pipe cover 3 or the channel width between the gusset are all significantly greater than the external diameter of steel wire spiral 5 or plastics helical teeth twisted strip 6, in case steel wire spiral 5 or plastics helical teeth twisted strip are run out of outside the mouth of pipe cover 3.
The air chamber 17 of formation is cut apart by dividing plate 7 in the top of bottom compartment 8, and along circumferentially uniform, the number of air chamber 17 is 2-12, and center 18 must be interconnected with one of them air chamber 17 and becomes same air chamber.The pipe number of the heat-transfer pipe 4 of heat exchanger the more, the number of air chamber 17 also just need design the more, helps reducing pipe number-air feed rate request that air feed simultaneously cleans, so that select less air blast or compressor for use.Fumarole on the air jet pipe 9 must be greater than center 18 radius r at the radius R of radially position of opening, so that make heat-transfer pipes 4 in the center 18 can realize equally that also pulse cleans in the process of air jet pipe 9 rotary jets.
The swing circle of air jet pipe 9 must be greater than the product of the number of rise time of steel wire spiral 5 or plastics helical teeth twisted strip 6 and air chamber 17.The rotational speed regulation flaps of installing on the air jet pipe 9 13.If the rotary speed of air jet pipe 9 is too fast or too slow, can be through the angle of inclination between hand hole 14 change rotational speed regulation flaps 13 and the horizontal cross-section, with this rotational resistance that increases or lower air jet pipe significantly, reach the rotation period of adjusting air jet pipe and the purpose of gasflow clean-up pulse period.
Claims (4)
1. a jet rotation pulse screw automatic washing type hangs down the flow velocity high-performance heat exchanger, by heat-transfer pipe (4), mouth of pipe cover (3), plastics helical teeth twisted strip (6) or steel wire spiral (5), housing (15), bottom compartment (8), dividing plate (7), air jet pipe (9), rotational speed regulation flaps formations such as (13), mouth of pipe cover (3) all is equipped with at the two ends up and down that it is characterized in that every heat-transfer pipe (4), place a plastics helical teeth twisted strip (6) or steel wire spiral (5) in the heat-transfer pipe (4), the diameter of plastics helical teeth twisted strip (6) or steel wire spiral (5) is all significantly less than the internal diameter of heat-transfer pipe (4), again significantly greater than the internal diameter of heat-transfer pipe (4) and mouth of pipe cover (3), and more much bigger than the mesh size or the channel width between the gusset of mouth of pipe cover (3); Be provided with rotatable air jet pipe (9) in the bottom compartment (8), air jet pipe (9) is gone up the rotational speed regulation flaps (13) of installation and the inclination angle between the horizontal cross-section can be regulated.
2. jet rotation pulse screw automatic washing type according to claim 1 hangs down the flow velocity high-performance heat exchanger, and the length that it is characterized in that plastics helical teeth twisted strip (6) or steel wire spiral (5) is than more than the short 100mmm of heat-transfer pipe (4).
3. jet rotation pulse screw automatic washing type according to claim 1 hangs down the flow velocity high-performance heat exchanger, it is characterized in that air chamber (17) that dividing plate (7) cuts apart formation is along circumferentially uniform, quantity is 212, the heat-transfer pipe of heat exchanger (4) radical the more, the number of air chamber (17) also just the more, and center (18) must be interconnected with one of them air chamber (17) and become same air chamber (17).
4. jet rotation pulse screw automatic washing type according to claim 1 hangs down the flow velocity high-performance heat exchanger, it is characterized in that the fumarole on the air jet pipe (9) must be greater than the radius r of center (18) at the radius R of radially position of opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520050707 CN2786539Y (en) | 2005-05-13 | 2005-05-13 | Blast air self-rotating impulse auto-cleaning type low flowing speed highly-efficient heat exchanger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520050707 CN2786539Y (en) | 2005-05-13 | 2005-05-13 | Blast air self-rotating impulse auto-cleaning type low flowing speed highly-efficient heat exchanger |
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| CN2786539Y true CN2786539Y (en) | 2006-06-07 |
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|---|---|---|---|
| CN 200520050707 Expired - Fee Related CN2786539Y (en) | 2005-05-13 | 2005-05-13 | Blast air self-rotating impulse auto-cleaning type low flowing speed highly-efficient heat exchanger |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106716046A (en) * | 2014-07-25 | 2017-05-24 | 集成测试与测量公司 | System and methods for detecting, monitoring, and removing deposits on boiler heat exchanger surfaces using vibrational analysis |
| CN108120338A (en) * | 2018-01-31 | 2018-06-05 | 丹阳同泰化工机械有限公司 | A kind of self-cleaning type vertical heat exchanger |
-
2005
- 2005-05-13 CN CN 200520050707 patent/CN2786539Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106716046A (en) * | 2014-07-25 | 2017-05-24 | 集成测试与测量公司 | System and methods for detecting, monitoring, and removing deposits on boiler heat exchanger surfaces using vibrational analysis |
| US10094660B2 (en) | 2014-07-25 | 2018-10-09 | Integrated Test & Measurement (ITM), LLC | System and methods for detecting, monitoring, and removing deposits on boiler heat exchanger surfaces using vibrational analysis |
| CN106716046B (en) * | 2014-07-25 | 2019-02-22 | 集成测试与测量公司 | The system and method that the deposit on boiler heat exchanger surface is detected, monitored and removed for using vibration analysis |
| US10724858B2 (en) | 2014-07-25 | 2020-07-28 | Integrated Test & Measurement (ITM), LLC | System and methods for detecting, monitoring, and removing deposits on boiler heat exchanger surfaces using vibrational analysis |
| CN108120338A (en) * | 2018-01-31 | 2018-06-05 | 丹阳同泰化工机械有限公司 | A kind of self-cleaning type vertical heat exchanger |
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