CN101210791B - Self-cleaning reinforcement heat transfer low flow resistance rotor in heat-transfer pipe - Google Patents
Self-cleaning reinforcement heat transfer low flow resistance rotor in heat-transfer pipe Download PDFInfo
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- CN101210791B CN101210791B CN2006101698285A CN200610169828A CN101210791B CN 101210791 B CN101210791 B CN 101210791B CN 2006101698285 A CN2006101698285 A CN 2006101698285A CN 200610169828 A CN200610169828 A CN 200610169828A CN 101210791 B CN101210791 B CN 101210791B
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Abstract
The invention relates to a low-flow resistance rotor with self-cleaning function and heat transfer enhancement used in a heat transfer tube, which comprises a plurality of rotors, supporting frames and a connecting shaft line. The supporting frames are fixed at the two ends of the heat transfer tube. The two ends of the connecting shaft line are fixed on the supporting frames respectively. The plurality of rotors are skewered on the connecting shaft line between the two supporting frames. The rotor consists of a hollow shaft and fins, wherein the hollow shaft is provided thereon with one and more fin(s), each fin is oblique to the central line of the hollow shaft, the working surface of each fin is swirl or flat or a combination thereof, and the fins are fixed uniformly on the outer surface of the hollowing shaft. In the inventive technical proposal, a fluid inside a tube can drive the rotor by the fins to rotate at a proper speed, so as to inhibit and eliminate the deposition of dirt, the fins can disturb the fluid inside the tube to enhance the convection heat transfer, the rotor occupies a small area inside the heat transfer tube to increase the axial flow area and reduce the blockage rate and flow resistance in the heat transfer tube, and the service life of the rotor is significantly prolonged.
Description
Technical field
The present invention relates to a kind of interior inserted component that is applied to antifouling scale removal and augmentation of heat transfer in the heat-transfer pipe in the equipment such as shell-and-tube heat exchanger, heat exchange reactor, particularly relate to a kind of low flow resistance rotor that utilizes the heat-transfer pipe inner fluid as cleaning and heat-transfer enhancing in the heat-transfer pipe of power.
Background technology
All to be applied to a large amount of heat exchangers in fields such as thermoelectricity, nuclear power, oil, chemical industry, metallurgy, food, light industry, ship power and Aero-Space, wherein the application of shell-and-tube heat exchanger accounts for the overwhelming majority, but shell-and-tube heat exchanger is at the problem ubiquity of heat transfer pipe inwall contamination fouling, make heat transfer property reduce variation, the fluid transporting resistance increases simultaneously, even causes line clogging; The tube wall dirt not only can bring potential safety hazard that corrosion reveals but also cause severe energy waste because of heat transfer efficiency reduces significantly, therefore needs the passive measure that stops production and clean taked regularly usually; For this reason, people are studying way and the device of inventing non-stop-machine online automatic antifouling scale removal and augmentation of heat transfer always for many years.In numerous antifouling descaling methods, the spiral band method is a kind of method of utilizing fluid dynamic energy to realize online automatic desludging, Chinese patent application number is ZL95236063.2, the innovation and creation of denomination of invention for " cleaning device of descaling and antiscaling in the heat-transfer pipe " are disclosed, the technical scheme of these innovation and creation constitutes by being equiped with in the heat-transfer pipe with the substantially mutually isometric distortion band of heat-transfer pipe, the radial dimension of distortion band is less than the internal diameter of heat-transfer pipe, at heat-transfer pipe inlet end the axial restraint frame is housed, there is flow-in hole at its middle part, the head of axial restraint frame has an axis hole, bearing pin is housed in the axis hole, and the afterbody of bearing pin is connected with the distortion band; Chinese patent application publication number CN 1424554, denomination of invention discloses a kind of enhanced heat exchange and automatic descaling apparatus for " spiral enhanced heat exchange of dual turbulent and automatic descaling apparatus ", this device is except being provided with spiral band, fixed mount, spiral band is arranged in the helix tube, drives spiral band by flowing by the fluid in the helix tube and rotates.Though shape is mobile in the shape of a spiral in helix tube for medium, helps improving the heat exchange effect, the slit between spiral band rotation and the helix tube inwall is inhomogeneous, and spiral band is little and inhomogeneous to the cleaning effect of helix tube inwall dirt layer, is unfavorable for scale removal.More than two kinds of spiral band methods apparatus for eliminating sludge the distortion band or be called spiral band and in heat-transfer pipe, be an end and be connected with fixed mount, the other end is unfixed, the radial dimension of distortion band is less than the internal diameter of heat-transfer pipe.The major defect of spiral band is: 1) need bigger driving moment in the course of work; 2) there is direct scraped finish in tie to the heat-transfer pipe inwall; 3) service life of end rolling bearing is short.4) except that the automatic desludging effect, a cooperative reinforcing heat-transfer effect is not remarkable; China Patent No. ZL200520127121.9 discloses the patent application of denomination of invention for " rotator type cleaning and heat-transfer enhancing device ", and this device is made of fixed mount, rotor, flexible shaft and stay pipe, and two fixed mounts are separately fixed at the two ends of heat-transfer pipe; The appearance of rotor has the spiral shell rib, and centre bore is arranged on the rotor; Stay pipe is located between rotor and the fixed mount, and flexible shaft passes the centre of rotor hole and stay pipe is fixed on two fixed mounts.This device has the function of the pre-good antiscale property of automatic on-line, cleaning and augmentation of heat transfer, under the situation of fluid following current or adverse current in heat-transfer pipe, the effect of scale inhibition and augmentation of heat transfer is arranged all.But, because its structure is continuous spiral shell rib design, when cooling medium flows in heat-transfer pipe, under the certain duty of flow, the rotary speed of rotor is that the lead angle by the spiral shell rib is determined that lead angle is more little, and promptly spiral shell rib helical pitch is short more, then rotary speed of rotator is fast more, but its flow resistance also increases thereupon simultaneously.When rotary speed of rotator higher, for example more than 200 rev/mins the time, the heat-transfer pipe inner fluid then causes turbulent flow under the disturbance of spiral shell rib, the augmentation of heat transfer effect is remarkable, still, it is also very outstanding that flow resistance increases problem, bright through the water flow test card, be that 8 meters, diameter are in 23 millimeters the heat-transfer pipe in length, adopting helical pitch is that the heat-transfer pipe of 100 millimeters triangular rotor contrasts with light pipe, because flow area reduces under the pumping condition of equal-wattage, flow reduces more than 50%.Though the problem that the way by perforate on the spiral shell rib can make flow resistance increase obtains alleviation to a certain degree, to processing and forming bring that mould structure is complicated, a series of problems such as manufacturing cost increase, service life shorten.
Summary of the invention
The objective of the invention is to design a kind of rotor of new construction, when keeping the cleaning and heat-transfer enhancing performance, can reduce the flow resistance of medium in the pipe significantly, and improve the controllability of working rotor rotating speed.
The technical scheme that the present invention addresses the above problem employing is: the low flow resistance rotor of cleaning and heat-transfer enhancing in a kind of heat-transfer pipe, it comprises rotor, bracing frame be connected axis, support frame as described above is fixed on the two ends of heat-transfer pipe, the two ends that connect axis are separately fixed on the bracing frame, described several rotors are installed on two connection axis between bracing frame, described rotor is made of hollow shaft and fin, described hollow shaft is provided with more than one fin, each fin becomes skewed with the hollow shaft center line, the fin working surface is vortex shape or plane, perhaps its both combination, fin evenly is fixed on the hollow shaft outer surface.
Link to each other before and after the space that each adjacent fin rotates a circle inswept with the hollow shaft by the center.
The hollow shaft cross sectional shape of described rotor is tapered, hollow many ribs type of open circles column type, open circles or hollow node type, the described fin that is fixed on the hollow shaft surface, and its surface is provided with sky.
The hollow shaft two ends of described rotor are provided with coaxial configuration, several are installed on the rotor that connects between two bracing frames on the axis, the hollow shaft two ends of its rotor are provided with head and afterbody, and the afterbody of the head of the hollow shaft of two one of them rotors of adjacent rotor and the hollow shaft of another rotor combines by described coaxial configuration.
The hollow shaft coaxial configuration of described rotor is the circular cone mode, can also be the ball-and-socket mode, universal joint mode or buckle mode.
The hollow shaft of described rotor and fin are to make by pottery, metal or by macromolecular material or polymer-based composite.
The low flow resistance rotor of cleaning and heat-transfer enhancing in the heat-transfer pipe that the present invention relates to, the length of its single rotor, the rotation parameters such as angle that outside diameter and fin tilted, can determine according to situations such as condition of work such as velocity of medium and manufacturing cost in heat-transfer pipe internal diameter, the pipe, both can take the connected mode of rotation synchronously between the adjacent rotor, also can adopt the structure of independent rotation separately.
The invention has the beneficial effects as follows:
Thereby 1, tube fluid drives rotor by fin and rotate dirt deposition had around central shaft with proper speed and suppress and the cleaning effect, and simultaneously, the interior flow media of pipe is formed with the flow regime that is beneficial to augmentation of heat transfer under the water conservancy diversion of rotor fin and perturbation action; 2, rotor occupied space circulation area little, that heat-transfer pipe is axial in heat-transfer pipe is big, blocking rate is low, and flow resistance is little; 3, under identical working speed, the axial thrust between rotor reduces, and rubbing action alleviates between rotor, thereby has reduced the kinetic energy loss of flow media in the course of work, and can significantly improve the service life of rotor; The present invention has reduced the raw materials consumption of rotor itself significantly through experiment showed, owing to the innovative design to rotor structure; On the basis of the self-cleaning function that keeps excellence, field synergy augmentation of heat transfer better effects if, compared with prior art, because blockage percentage reduces more than 60%, flow resistance is also reduced significantly, and has also increased substantially serviceability when reducing manufacturing cost.
When the present invention installs in heat-transfer pipe, according to heat-transfer pipe length, with connecting axis together with several unit rotor inlines, extend through in the heat-transfer pipe, the bracing frame that utilization is arranged on the heat-transfer pipe end is fixed on the two ends of heat-transfer pipe, under the fluid effect,, make rotor produce rotation, thereby heat-transfer pipe inwall bur is cleaned by fin; Medium flow field in managing is carried out disturbance, be formed with the turbulent flow that is beneficial to augmentation of heat transfer.The structure of fin can be flexible and changeable, according to the practical application needs, sky can also be set on fin, thereby further reduce rotary resistance and fluid flow resistance.
Description of drawings
Fig. 1 is a vortex rotor structure schematic diagram of the present invention.
Fig. 2 is the right TV structure schematic diagram of Fig. 1.
Fig. 3 is a combined rotor structure schematic diagram of the present invention.
Fig. 4 is the right TV structure schematic diagram of Fig. 3.
Fig. 5 has exposed throughout type rotor structure schematic diagram for the present invention.
Fig. 6 is the right TV structure schematic diagram of Fig. 5.
Fig. 7 is the perspective view of Fig. 1 vortex rotor.
Fig. 8 is the whole sectional structure schematic diagram of the present invention.
Among the figure, 1 taper concave station, 2 vortex fins, 3 hollow shafts, 4 cone bosses, 5 combined type fins, 6 exposed throughout type fins, 7 saturating skies, 8 bracing frames, 9 coaxial configurations, 10 heat-transfer pipes, 11 connect axis.
The invention will be further described below in conjunction with accompanying drawing.
The specific embodiment
As shown in Figure 8, a kind of embodiment of the low flow resistance rotor of cleaning and heat-transfer enhancing in the heat-transfer pipe that the present invention relates to, it comprises rotor, bracing frame 8 be connected axis 11, support frame as described above 8 is fixed on the two ends of heat-transfer pipe 10, the two ends that connect axis 11 are separately fixed on the bracing frame 8, described several rotors are installed on the connection axis 11 of 8 of two bracing frames, described rotor is Vorticose vortex fin 2 by hollow shaft 3 and working surface and constitutes, described hollow shaft 3 is provided with more than one vortex fin 2, each vortex fin 2 becomes skewed with hollow shaft 3 center lines, and each vortex fin 2 evenly is fixed on the outer surface with hollow shaft 3.
Each adjacent fin 2 links to each other by the front and back, space that the center rotates a circle inswept with hollow shaft 3.
To shown in Figure 8, hollow shaft 3 cross sectional shapes of described rotor are the open circles column type as Fig. 1; It is as shown in Figure 3 and Figure 4, described that what be fixed on hollow shaft 3 surfaces is by vortex shape and the plane combined type fin 5 that combines; As shown in Figure 5 and Figure 6, described what be fixed on hollow shaft 3 surfaces is exposed throughout type fin 6, and its surface is provided with empty 7.
The external diameter of rotor of the present invention is slightly less than the internal diameter of heat-transfer pipe 10, centre of rotor hole internal diameter is slightly larger than the external diameter that connects axis 11, on described each rotor adjacent fin along axis rotate a circle the zone scanned should before and after link to each other or overlap, to guarantee that heat-transfer pipe 10 inner surfaces are had sufficient cleaning ability; Thereby tube fluid drives rotor by fin has inhibition and cleaning effect with the proper speed rotation to dirt deposition, and fin has perturbation action to tube fluid simultaneously, strengthens convection heat transfer' heat-transfer by convection; The circulation area that rotor occupied space in heat-transfer pipe is little, heat-transfer pipe 10 is axial is big, blocking rate is low, flow resistance is little, under identical working speed, axial thrust between rotor reduces, rubbing action alleviates between rotor, thereby reduced the kinetic energy loss of the flow media in the course of work, and significantly improved the service life of rotor.
Claims (6)
1. the low flow resistance rotor of cleaning and heat-transfer enhancing in the heat-transfer pipe, it comprises rotor, bracing frame be connected axis, support frame as described above is fixed on the two ends of heat-transfer pipe, the two ends that connect axis are separately fixed on the bracing frame, described several rotors are installed on two connection axis between bracing frame, it is characterized in that: described rotor is made of hollow shaft and fin, described hollow shaft is provided with more than one fin, each fin becomes skewed with the hollow shaft center line, the fin working surface is vortex shape or plane, perhaps its both combination, fin evenly is fixed on the hollow shaft outer surface.
2. the low flow resistance rotor of cleaning and heat-transfer enhancing in the heat-transfer pipe according to claim 1 is characterized in that: link to each other before and after the space that each adjacent fin rotates a circle inswept with the hollow shaft by the center.
3. the low flow resistance rotor of cleaning and heat-transfer enhancing in the heat-transfer pipe according to claim 1 and 2, it is characterized in that: the hollow shaft cross sectional shape of described rotor is tapered, hollow many ribs type of open circles column type, open circles or hollow node type, the described fin that is fixed on the hollow shaft surface, its surface is provided with sky.
4. the low flow resistance rotor of cleaning and heat-transfer enhancing in the heat-transfer pipe according to claim 1 and 2, it is characterized in that: the hollow shaft two ends of described rotor are provided with coaxial configuration, several are installed on the rotor that connects between two bracing frames on the axis, the hollow shaft two ends of its rotor are provided with head and afterbody, and the afterbody of the head of the hollow shaft of two one of them rotors of adjacent rotor and the hollow shaft of another rotor combines by described coaxial configuration.
5. the low flow resistance rotor of cleaning and heat-transfer enhancing in the heat-transfer pipe according to claim 4, it is characterized in that: the hollow shaft coaxial configuration of described rotor is the circular cone mode, can also be the ball-and-socket mode, universal joint mode or buckle mode.
6. the low flow resistance rotor of cleaning and heat-transfer enhancing in the heat-transfer pipe according to claim 1 and 2 is characterized in that: the hollow shaft of described rotor and fin are to make by pottery, metal or by macromolecular material or polymer-based composite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101698285A CN101210791B (en) | 2006-12-29 | 2006-12-29 | Self-cleaning reinforcement heat transfer low flow resistance rotor in heat-transfer pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101698285A CN101210791B (en) | 2006-12-29 | 2006-12-29 | Self-cleaning reinforcement heat transfer low flow resistance rotor in heat-transfer pipe |
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| Publication Number | Publication Date |
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| CN101210791A CN101210791A (en) | 2008-07-02 |
| CN101210791B true CN101210791B (en) | 2010-11-10 |
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| CN2006101698285A Expired - Fee Related CN101210791B (en) | 2006-12-29 | 2006-12-29 | Self-cleaning reinforcement heat transfer low flow resistance rotor in heat-transfer pipe |
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| CN102102960B (en) * | 2009-12-16 | 2012-10-31 | 北京化工大学 | Combined rotor with vanes in interlaced crossover directions in heat exchange tube |
| CN102102961B (en) * | 2009-12-16 | 2012-06-27 | 北京化工大学 | Self rotation type rotor connection structure in heat exchange tube |
| CN102128559B (en) * | 2010-01-14 | 2013-08-14 | 北京化工大学 | Low driving force self-cleaning and heat transfer enhancement rotor in heat exchange tube |
| CN101769697B (en) * | 2010-03-04 | 2011-09-14 | 清华大学 | Connecting twisted plate type self-centering cleaning and descaling component for in-tube pull rod |
| CN101832733B (en) * | 2010-05-27 | 2012-04-18 | 北京化工大学 | Automatic centering support bracket in heat exchange tube |
| CN101968332A (en) * | 2010-09-20 | 2011-02-09 | 北京华夏壹泰科技有限公司 | EHT (Extra High Tension) self-cleaning energy-saving environment-friendly device and manufacture method thereof |
| CN102506607B (en) * | 2011-06-09 | 2013-07-17 | 成信绿集成股份有限公司 | Dust collection device for low-temperature economizer of thermal power plant |
| CN104433797A (en) * | 2014-11-10 | 2015-03-25 | 江苏创兰太阳能空调有限公司 | Water dispenser |
| CN104501649B (en) * | 2014-12-30 | 2016-04-20 | 国电龙源节能技术有限公司 | A kind of strengthening cleaning device of condenser condenser pipe |
| CN106370272A (en) * | 2016-08-31 | 2017-02-01 | 许伟 | Magnetic flip plate liquid level meter with fins and floating ball |
| CN106610250A (en) * | 2016-12-01 | 2017-05-03 | 重庆渝青机械配件制造有限公司 | Combined type suit bond |
| CN107990563A (en) * | 2017-11-15 | 2018-05-04 | 韦治东 | Vane type solar energy heat collection pipe |
| CN107990302A (en) * | 2017-12-21 | 2018-05-04 | 华电电力科学研究院 | A kind of device and method for preventing superheater and the blocking of reheater oxide skin |
| CN110871049B (en) * | 2018-09-03 | 2021-07-27 | 中国石油化工股份有限公司 | High-efficiency heat exchange reaction tube |
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2006
- 2006-12-29 CN CN2006101698285A patent/CN101210791B/en not_active Expired - Fee Related
Patent Citations (8)
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| FR2637659A1 (en) * | 1988-10-10 | 1990-04-13 | Total France | Improved device for holding in position one end of an element which is mounted so that it can move rotationally inside a tube |
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Non-Patent Citations (1)
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Effective date of registration: 20181009 Address after: 030006 13, Wynn International Building, 219 Sports Road, Xiaodian District, Taiyuan, Shanxi. Patentee after: Shanxi Wenxin Chuang Chuang Energy Saving Technology Co., Ltd. Address before: 100029 202, room 3, building 11, Sakura East Street, Chaoyang District, Beijing. Patentee before: Beijing Huaxia Yinglan Technology Development Co., Ltd. |
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