CN2293789Y - Straight-through double spiral-flow double pipe heat exchanger - Google Patents
Straight-through double spiral-flow double pipe heat exchanger Download PDFInfo
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- CN2293789Y CN2293789Y CN 97213320 CN97213320U CN2293789Y CN 2293789 Y CN2293789 Y CN 2293789Y CN 97213320 CN97213320 CN 97213320 CN 97213320 U CN97213320 U CN 97213320U CN 2293789 Y CN2293789 Y CN 2293789Y
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Abstract
The utility model provides a straight-through heat exchanger with double spiral-flow sleeve pipes. The heat exchanger is characterized in that a heat exchanging element is composed of three layers of steel pipes which are sheathed, spiral blades are welded on the outer walls of the steel pipes of the inner and the middle layers, and two spiral channels can be formed by the sheathed steel pipes, so that smoke gases and air can pass through the spiral channels respectively, and the course of heat exchange can be completed. The total body of the heat exchanger is a pipe bundle body with a single travel range, and is composed of the heat exchanging elements which are densely arranged according to the maximum degree. The heat exchanger can transfer heat on two sides by using the reinforcement of rotating airflow. The utility model has the advantages of high heat transfer coefficient, small resistance loss, high preheating temperature, big heat exchanging area for unit volume; the utility model also has the advantages that the heat exchanger can not be blocked by smoke dust and can not be limited by smoke temperature, etc. The utility model is suitable for matching with industrial furnaces.
Description
The utility model relates to heat transfer technology, especially makes heat exchange element with through type bispin stream sleeve pipe and realizes the novel metal heat exchanger of efficient low-resistance heat exchange for one, recycles the fume afterheat use for industrial furnace.
Metallic recuperator is the energy saver that industrial furnace uses, and is divided into radiation recuperator and convection recuperator two major types according to leading heat transfer type difference, uses radiation recuperator when flue-gas temperature is higher than 1000 ℃, uses convection recuperator when being lower than 1000 ℃.
The industrial furnace energy-saving significance is great, requires more and more highly, impel metallic recuperator to become the indispensable corollary apparatus of industrial furnace, and its technical performance also will constantly increase, and just can obtain bigger energy-saving effect.So, produced multiple novel metal heat exchanger in the last few years in succession.But give indexs such as hot temperature from flue gas waste heat recovery rate and air, existing metallic recuperator all reaches requirement far away, and gap is still bigger, so still need make great efforts to make at present new improvement, increase substantially technical and economic performance, to satisfy the needs that energy-conservation level is increased day by day.
Convection recuperator almost all adopts countercurrent flow, operating position is that inlet flue gas temperature mostly is 600～800 ℃ at present, and giving hot temperature, air has only about 400 ℃, seldom reach 500 ℃, even inlet flue gas temperature is above 900 ℃, also fail to break through 600 ℃, to making outlet cigarette temperature still between 300～400 ℃, the waste heat recovery rate is lower than 60%.So the improvement of convection recuperator mainly still improves heat exchange property, promptly improve and give hot temperature, make the porch temperature difference be reduced to 250～150 ℃ (capping when the cigarette temperature is high takes off limit when low) and allow the waste heat recovery rate reach more than 60%, temperature efficiency surpasses 70%.The various novel convection recuperator of Chu Xianing is in the last few years failed the progress of making a breakthrough property on heat exchange property, tracing it to its cause is fundamentally not change heat exchange type of flow institute extremely.So, desire to make the improvement of convection recuperator fruitful, must be to change the heat exchange type of flow, the heat transfer coefficient that makes fume side and air side is under the condition that flow resistance obtains an equitable breakdown, big increase is arranged simultaneously, just can make heat exchange property reach the high-level requirement that the front proposes.
Radiation recuperator mostly is the following current heat exchange, and flue gas low speed in inner core upwards flows, and the circumferential weld high speed of air between inner/outer tube upwards flows.Flue gas relies on the advantage of 4 variances of absolute temperature in inner core, with very big radiant heat flux heat is passed to inner tube wall, and temperature changes thereupon fast, and flowing through highly promptly drops to about 900 ℃ about 4 meters, and loses the radiant heat transfer advantage.So radiation recuperator waste heat recovery rate is lower than 20% always, outlet cigarette temperature is higher than 800 ℃, and air gives hot temperature and has only 200～300 ℃.Other shortcomings of radiation recuperator are, air velocity is generally 20～30Nm/s in the circumferential weld, and drag losses is up to 5000～9000Pa; Though inner core is made with 1Cr18Ni9ti or Cr25Ni2O heat resisting steel, the smoke inlet end is burnt out generation is often arranged in actual the use.For improving radiation recuperator waste heat recovery rate, the unitized exchanger that several radiation add convection current has appearred, its scheme is the variation according to flue-gas temperature and heat-transfer mechanism, natural and design, basically be radiation recuperator with being connected in series of convection recuperator, not only the two shortcoming still exists, and general structure is very complicated, manufacture difficulty is big, the equipment manufacturing cost height.Make radiation recuperator obtain big improvement, must create a kind of novel metal heat exchanger of suitable recovery high-temperature flue gas waste heat again, this creation need be selected new heat transfer type to high-temperature flue gas, and can not only emphasize radiant heat transfer.
By the above, metallic recuperator is made significant improvement, no matter be convection recuperator, or radiation recuperator, all should take the new heat exchange type of flow, and version the two to unify, needn't just be divided into two kinds of different heat exchangers by flue-gas temperature, make the new type heat exchanger of creation have great versatility.For realizing this goal, the ad hoc the utility model of having counted, promptly through type bispin stream double-tube heat exchanger is as follows to its structure and performance specification;
1, through type bispin stream double-tube heat exchanger structure
The heat exchange element of through type bispin stream double-tube heat exchanger is a through type bispin stream sleeve pipe, and as shown in Figure 1, this element is mainly used the pipe fitting of being made by three garden pipes to be nested with one heart and formed, and wherein 1 is interior cyclone pipe, the 2nd, and outer cyclone pipe, the 3rd, outer tube.Respectively be welded with helical blade on the outer tube wall of interior cyclone pipe 1 and outer cyclone pipe 2, eddy flow chamber 4 and outer eddy flow chamber 5 in constituting respectively after being nested.Interior cyclone pipe 1 two ends sealing, gas is not walked in the centre.Outer cyclone pipe 2 and outer tube 3 two ends do not seal, and the regulation flue gas flows in interior eddy flow chamber 4, enter the upper end by the lower end and flow out, eddy flow in forming; Air flows in the eddy flow chamber 5 outside, enters that the lower end is flowed out or the lower end enters the upper end and flows out by the upper end, forms outer eddy flow.Because interior eddy flow and outer eddy flow are respectively for straight-through up and down, so be named as through type bispin stream sleeve pipe.Whether the tube wall that interior eddy flow flows by outer cyclone pipe 2 with outward turning carries out heat exchange, identical according to inside and outside eddy flow flow direction, forms downflow type heat exchange or counter-flow heat exchange, but based on counter-flow heat exchange.
The general structure of through type bispin stream double-tube heat exchanger, it is the tube bundle that constitutes by through type bispin stream sleeve pipe, as shown in Figure 3, but two characteristics are arranged: the one, there is not gas in tube bank, to pass through, tube bank is maximum solid matter row, A-A shows the cross section of arrangement among Fig. 3, and wherein d is the external diameter of outer tube 3, and δ (desirable 5mm) is the gap of staying for weld seam; The 2nd, horizontal direction does not have multiple-pass, and heat transfer process is only finished in height the stroke, and flue gas and air all do not change Cheng Liudong, have removed the local resistance loss between stroke fully.In Fig. 3, the lower port of each outer cyclone pipe 2 is welded mutually with flue gas orifice plate 6, and opening is accepted flue gas and entered interior eddy flow chamber 4 directly facing to flue, becomes the interior eddy flow that upwards flows; The upper port of each outer cyclone pipe 2 is welded mutually with flue gas up-hole plate 7, and opening makes the flue gas that flow out in eddy flow chamber 4 in each converge back inflow smoke discharging pipe facing to flue gas header box 8.Flue gas up-hole plate 7 peripheries link to each other with expansion loop 9, can vertically move, and compensate the thermal expansion of outer cyclone pipe 2.Outer tube 3 lower port are welded mutually with air orifice plate 10, and air orifice plate 10 and the flue gas orifice plate 6 same distances that have constitute air header box 11, and the hot-air that flow out in each outer eddy flow chamber 5 converges the inflow hot air duct in this.Outer tube 3 upper port are welded mutually with air up-hole plate 12, are air flow case 13 between air up-hole plate 12 and the flue gas up-hole plate 7, and the cold air that cold air duct is sent into flows into eddy flow chamber 5 outside each in herein, form outer eddy flow from top to bottom.Air up-hole plate 12 peripheries link to each other with expansion loop 14, the thermal expansion of compensation outer tube 3.Whole tube bundle is contained in the peripheral tube 15, and peripheral tube 15 2 ends are welded with flange 16 and 17, is used for equipment and installs or install additional maintenance cover plate 18, hence one can see that, and the utility model overall structure is very simple, and external form is regular agile, inside mainly is the interspersed and welding of the garden shape body of length, is easy to make.
Fig. 3 and the above are discharged fume if stove adopts on the bridging over flue by considering with the underground flue smoke evacuation, only need heat exchanger shown in Figure 3 oppositely installed get final product, and all be located at ground because of induced-draft fan and air blast this moment, discharge fume and air pipe line will be more simple.
2. the through type bispin flows the double-tube heat exchanger performance
1) heat convection and drag losses
The heat transfer coefficient size depends primarily on thermal resistance, the thermal resistance boundary-layer proportion maximum of heat convection, and only the thermal resistance of laminar sublayer is just up to 80%.Strengthen heat convection, must make the energy or the drag losses major part of increase be used for attenuate or break through boundary-layer, could significantly reduce thermal resistance and improve heat transfer coefficient, this is the key point of so-called efficient low-resistance, and through type bispin stream double-tube heat exchanger is promptly by this principle design.Interior eddy flow chamber 4 is by interior, outer cyclone pipe 1 and 2 spirality channels that are nested and surround, section is rectangular, axis direction length is identical with outer cyclone pipe 2, middle not interruption, interior eddy flow does not take a sudden turn in flowing, suddenly expanding or contraction, with fixed surface collision or disengaging etc., remain the flow direction that parallels with helical blade, no matter flow velocity height, all be steady and continuous stream, thereby do not have local resistance loss, except that the kinetic energy that the assurance flow needs, drag losses mainly is the direct consumption of broken and attenuate boundary-layer, promptly by rotary centrifugal force to the air mass work done, make air mass obtain radial acceleration and pour boundary-layer, play the disturbance fragmentation.Meanwhile, on the whole height of rectangular cross section, the boundary-layer tangential velocity of primary air particle at the interface all is that the highest and direction of numerical value is pointed to boundary-layer, equally cut just as scraper, with boundary-layer peel off scrape thin.Interior eddy flow flow velocity is higher, and effect broken and the attenuate boundary-layer is stronger, can be taken as 8～10Nm/s, and this moment, drag losses was about 600～1000Pa, needed to adopt the induced-draft fan smoke evacuation.In addition, interior cyclone pipe 1, similar with in-line twisted strip plug-in unit, but can being segmentation, its tube core adopts different diameters, as shown in Figure 2, along with flue-gas temperature reduces and suitable dilated diameter, being used to improve flow velocity, keeping convective heat flow not reduce, also is a kind of invigoration effect, so the specific structural features of interior cyclone pipe 1 is the omnidistance helical blade pipe of a kind of segmentation (1～5 section) reducing.
Outer eddy flow chamber 5 China and foreign countries' eddy flow mobility status are identical with interior eddy flow, but outer eddy flow is the outer wall from outer cyclone pipe 2 obtains heat, for the boundary-layer that reduces on this wall of thermal resistance is also wanted attenuate, yet mechanism is different, because the eddy flow action of centrifugal force is to make air mass break away from boundary-layer, the tangential velocity numerical value of primary air particle is less at the interface at boundary-layer, and direction is pointed to primary air, when air mass or stream thigh disengaging boundary-layer, the vortex of generation makes the boundary-layer turbulent fluctuation and attenuation.The attenuate boundary-layer must strengthen producing the vortex turbulent fluctuation, will improve swirl velocity for this reason and strengthen centrifugal force, also will carry out coarse processing to wall simultaneously, allows the wall ledge constantly scratch boundary-layer, produces air mass in small, broken bits in a large number.In the eddy flow chamber 5, helical blade also plays a part the expansion heat-transfer area, suitably dwindle pitch, increases blade area outside.In a word, outer eddy flow reduces thermal resistance by increasing heat transfer area and increasing boundary-layer frictional resistance, compare with interior eddy flow, drag losses is bigger, but owing to do not have local resistance loss in flowing, thereby have the efficient low-resistance feature equally, and outer eddy flow flow velocity is taken as 10～14Nm/s, and drag losses is about 1000Pa.
Above-mentioned pointing out, the utility model is not owing to change the journey local resistance loss, and always hinder and decrease 50% invalid drag losses and be given to fume side accounting for air side in the general convection recuperator, become and strengthen the effective resistance loss that flue gas conducts heat, fume side and air side, the effective resistance of eddy flow and outer eddy flow loss promptly, again based on the direct consumption of broken and attenuate boundary-layer, the approaching lower limit that can not reduce again.Total power consumption does not roughly become, and complex heat transfer coefficient but has increase greatly, reaches the efficient low-resistance target thus.This is the result of drag losses reasonable distribution, has only the through type of use bispin stream sleeve pipe to carry out the one-stroke heat exchange, just can accomplish this point.
2) radiant heat transfer
The radiant heat transfer ability is directly proportional with absolute temperature 4 powers, so emphasize to use radiant heat transfer when the cigarette temperature is higher than 1000 ℃ more, quite different in through type bispin stream sleeve pipe, the cigarette temperature is that radiation and convection current are laid equal stress on when being higher than 1000 ℃, radianting capacity weakens when being lower than 1000 ℃, directly becomes based on convection heat transfer' heat-transfer by convection in the eddy flow chamber.Interior eddy flow chamber 4 is equivalent to the rectangular tube of endless, equivalent diameter is little, average ray length is also little, compares with the general radiation heat exchanger, and blackness of exhaustion reduces more than 60%, radiant heat flux also reduces thereupon equally, thereby radiant heat transfer weakened, but high-temperature flue gas has high flow velocity at the very start, and convection heat transfer' heat-transfer by convection is strengthened, play the effect of remedying, so radiation and convection current are laid equal stress on simultaneously.But the heat exchanging wall plays a protective role like this, when flue-gas temperature raises suddenly, can tube wall not burnt out because radiant heat flux increases suddenly, has reduced the requirement that must use high-quality heat resisting steel to high-temperature flue gas.When the equivalent diameter with eddy flow chamber 4 in the n is the through type bispin stream sleeve pipe of d, when replacing an inner diameter of steel flue to be the radiation recuperator of D, eddy flow chamber radiation heat transfer gross area F in derivation can draw
dWith radiation recuperator heat exchange area F
DBetween relational expression be
W in the formula
dAnd W
DBe respectively the flow velocity of flue gas in interior eddy flow chamber 4 and radiation recuperator.Generally can have
N=700～1300, then
Be through type bispin stream double-tube heat exchanger when the identical and flue gas flow rate of flue gas flow increases 3～4 times, the heat exchange area that can carry out radiant heat transfer is 46～72 times of general radiation heat exchanger.The multiple that the multiple that heat exchange area increases far surpasses blackness of exhaustion and leads radiation coefficient to reduce, when so through type bispin stream double-tube heat exchanger is used for high-temperature flue gas, though radiant heat flux reduces, the radiant heat transfer amount but has increase greatly, and these very favourable characteristics obtain in that radiant heat transfer and convection heat transfer' heat-transfer by convection are unified in the same eddy flow chamber.So, no matter be high-temperature flue gas, middle temperature flue gas, or low-temperature flue gas, its waste heat can use with the through type bispin stream double-tube heat exchanger of spline structure and recycle, and only is that quantity, length and the material of heat exchange element changes with flue gas flow is different with inlet temperature.For high-temperature flue gas, because the little retaining wall effect of radiant heat flux is arranged, can adopt full countercurrent heat exchange method that air is given heat to 600～700 ℃, can also suitably lower the requirement to the metal material of pipe fitting.In addition, shown in Figure 3 is the version of heat exchange element with through type bispin stream sleeve pipe, allows and helps making interior cyclone pipe 1 and outer cyclone pipe 2 into SiC matter shape tube, not only high temperature resistant, and thermal conductivity is good, air can be given heat to 700～900 ℃, and temperature efficiency surpasses 70%.
About radiant heat transfer, the middle effect of wall can make it be strengthened.The eddy flow chamber 4, heated by interior eddy flow flue gas, has zero hot side character by its surface in constituting for interior cyclone pipe 1, and surface temperature is higher than outer cyclone pipe 2 inner wall temperatures, thereby externally cyclone pipe 2 carries out radiant heat transfer, has increased heat output.Outside in the eddy flow chamber 5, outer cyclone pipe 2 outside wall temperatures are than outer tube 3 inner wall temperature height, outer cyclone pipe 2 conducts heat to outer tube 3 with radiation mode, and outer tube 3 is passed to air with convection type with obtained heat again, and the heat transfer to air has also been strengthened in this middle effect to a great extent.
3) heat exchange area per unit volume
Through type bispin stream sleeve pipe cross section will be designed to standard size, and length is determined by needed heat exchange area.Press embodiment, cyclone pipe 1, outer cyclone pipe 2 and outer tube 3 use Φ 10 * 2, Φ 34 * 2 and Φ 56 * 2 seamless steel pipes to make weld gap δ=5 respectively in getting
Mm, then calculate to such an extent that heat exchange area per unit volume is 41m
2/ m
3, considered the area that the coarse processing of tube wall face is increased in the calculating, be the increase of heat exchange area if again the heat transfer effect of middle (contactless expansion heat-transfer area) also is converted to, above result of calculation roughly to be increased to 62m
2/ m
3, be 2～3 times of steel pipe plug-in unit heat exchanger.Though the multiple that increases not as two-sided needle-like heat exchanger is big, compares with steel pipe plug-in unit heat exchanger, the shared volume of heat exchange element also reduces more than 50%, and is issued to not increasing drag overall loss condition.Consider from outfit of equipment owing to do not change the journey bellows, with multiple-pass heat exchanger such as steel pipe plug-in unit relatively, outfit of equipment is long-pending will to reduce 40～60%.
Whether proper, also will weigh with the heat exchange area metal use amount Gh of unit if improving the heat exchange area per unit volume measure.Through type bispin stream sleeve pipe uses three layers of sleeve pipe, and the inevitable silver of Gh is big, is 27.7kg/m by the weight of every meter long of last embodiment.The quantity of hot air of taking and giving is 10000Nm
3/ h, air velocity is 12Nm/s in heat exchange element, can be regarded as to such an extent that need through type bispin stream sleeve pipe be 256.As use steel pipe plug-in unit heat exchanger instead, and number of tubes is identical, and calculating steel pipe sizes is Φ 38 * 2, belongs to the normal specification of using, and has comparativity, and its substance is that the average heat exchange area of 1.78kg/m is 0.113m
2/ m is so there is Gh=1.78/0.113=15.7kg/m
2, bellows weight is taken into account up and down, and Gh will double at least, reaches 31.4kg/m
2As seen two compare, and through type bispin stream sleeve pipe is big owing to the body heat exchange area, and general structure does not need to change the journey bellows, and the metal use amount of unit heat exchange area in every meter stroke is not only increased, and reduces in addition, does not have serious excess problem.
4) practicality
Through type bispin stream double-tube heat exchanger has following characteristics aspect practical:
(1) the flue gas majority of the strong stove discharge of flue gas adaptability contains flue dust, and coal-fired furnace kiln is the most serious.Flue gas because flow velocity is low and the tube wall collision, always produces dust stratification and fouling when the tube bundle, has influenced the stable of heat exchange property, two-sided needle-like and the easier obstruction of sheet heat exchange of heat pipe and must not use for a long time.Flue gas passes through in through type bispin stream sleeve pipe, and situation differs widely, and at first interior eddy flow chamber 4 exports from entering the mouth to only washes away wall in the whole flow process, do not collide wall, and flue dust deposits and fouling nowhere.Secondly flue gas flow rate is 8～10Nm/s, and much larger than the entrainment velocity of flue dust, entering the eddy flow chamber must be taken out of, can't deposit obstruction.So through type eddy flow double-tube heat exchanger has stronger adaptability to flue gas, also can use ash-laden gas, passage does not have dust stratification to stop up, and heat exchange property is unaffected.
(2) make simply
Heat exchanger criteria of right and wrong equipment, whether manufacturing process simply has a significant impact cost and quality.Steel pipe plug-in unit heat exchanger structure is simple, easy makes, generally is happy to adopt.Through type bispin stream double-tube heat exchanger also has same characteristics, its heat exchange element be it seems complexity, being actually the seamless pipe face that is nested becomes, helical blade welds with special equipment, and blade height and pitch are adjustable, and the accurate speed of size is fast, be fit to produce in batches, freely insert when being nested, locate automatically, overall package also is interting of heat exchange element and welding, and is basic identical with steel pipe plug-in unit heat exchanger.In addition, when the waste heat recovery amount was big, steel pipe plug-in unit heat exchanger need adopt multiple-pass, and was bulky, must split be transported to the use scene, in conjunction with the connection that is installed between the every trade journey, and the complicated trouble of process.No matter through type bispin stream double-tube heat exchanger ability size all is the one-stroke structure, the cross section is little, and profile is a long garden tubular, transport easyly, is assembled in the manufactory and once finishes, and need not to extend to use factory.The various especially multiple-pass structure of these characteristics heat exchanger can't be obtained.
More than structure of the present utility model and heat exchange property etc. are described, therefrom visible its major advantage has the following:
1, flue gas and air two sides are utilized continuous swirling eddy fragmentation simultaneously and are subtracted the book boundary-layer, and diabatic process is strengthened, and the complex heat transfer coefficient vary within wide limits can be brought up to 70W/m
2.c, the high efficient heat exchanging effect is obvious.
When 2, flue gas and air pass through in each spin current chamber, except that keeping the needed kinetic energy of flow, drag losses mainly is broken and subtracts the direct consumption of book boundary-layer, do not have other local resistance losses, near the lower limit that can not reduce again, be farthest to have realized the high-efficiency low-resistance requirement.
3, general structure is solid matter that stringing density the has reached peak stroke tube bundle of itemizing, flue gas and air all pass through in heat exchange element inside, be nested and helical blade is arranged and heat exchange element is triple steel pipes, contact and noncontact expansion heat-transfer area occupy significant proportion, these structural factors facilitate the tube bundle heat exchange area per unit volume that increase is arranged greatly, have reached 60m
2/ m
3About, be more than two times of steel pipe plug-in unit heat exchanger, will reduce 40～60% and outfit of equipment is long-pending.
4, the Joint effect of above-listed three advantages is need not to enlarge number of strokes may and too much increasing under the drag losses condition, concerning the flue gas of all temps, can realize that high temperature gives heat and improves the waste heat recovery rate.
5, the solid matter stroke tube bundle structure of itemizing, the unit's of making heat exchange area metal use amount does not only increase, and also slightly reduces, and processing and fabricating is also simple, and overall assembling is once finished.Equipment manufacturing cost is low.
6, practical, though flue-gas temperature height, no matter flue gas dust-laden whether can directly use, and stable performance, not easy burn-out and obstruction.
Claims (3)
1, a kind of through type bispin stream double-tube heat exchanger is characterized in that this heat exchanger is to make heat exchange element with through type bispin stream sleeve pipe, makes it by the one-stroke heat exchanger of solid matter row formation at utmost.In the general structure of this heat exchanger, the lower port of the outer cyclone pipe 2 of each heat exchange element is welded mutually with flue gas orifice plate 6, and opening directly facing to flue, weld mutually with flue gas up-hole plate 7 by upper port, opening is facing to flue gas header box 8, and flue gas up-hole plate 7 peripheries link to each other with expansion loop 9.Outer tube 3 lower port of each heat exchange element are welded mutually with air orifice plate 10, and upper port is welded mutually with air up-hole plate 12.Being air header box 11 between air orifice plate 10 and the flue gas orifice plate 6, is air flow case 13 between air up-hole plate 12 and the flue gas up-hole plate 7.The periphery of air up-hole plate 12 links to each other with expansion loop 14.The whole tube bundle of heat exchanger is contained in the peripheral tube 15, and two ends of peripheral tube 15 are welded with flange 16 and maintenance cover plate 18 is installed or installed additional to the 17 usefulness equipment that gives.Peripheral tube 15 upper ends have exhanst gas outlet and cool air inlet communicates with flue gas header box 8 and air flow case 13 respectively; The lower end has hot air outlet, communicates with air header box 11.Above overall structure binds closes counter-flow heat exchange and uses on lower flue and narrate, as the upper flue that is used to make somebody a mere figurehead, and general structure is constant, only needs oppositely to install.
2, according to the described through type bispin stream of claim 1 double-tube heat exchanger, it is characterized in that used through type bispin stream sleeve pipe heat exchange element, is to be nested by three layers of pipe fitting made from seamless steel pipe to form, and internal layer is interior cyclone pipe 1, the intermediate layer is outer cyclone pipe 2, and skin is an outer tube 3.The outer surface of interior cyclone pipe 1 and outer cyclone pipe 2 is welded with helical blade, and the back that is nested forms straight-through up and down interior eddy flow chamber 4 and outer eddy flow chamber 5.Flue gas is walked in interior eddy flow chamber 4, and air is walked in outer eddy flow chamber 5, and interior cyclone pipe 1 tube core two ends are shut, and do not walk gas.When giving hot temperature above 700 ℃, the SiC matter shape tube of interior cyclone pipe 1 and the same form of outer cyclone pipe 2 usefulness replaces.
3 according to the described through type bispin stream of claim 1 double-tube heat exchanger, it is characterized in that the structure of the interior cyclone pipe 1 of used through type bispin stream sleeve pipe heat exchange element, is the omnidistance eddy flow chip pipe of a kind of segmentation (1～5 section) reducing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97213320 CN2293789Y (en) | 1997-04-18 | 1997-04-18 | Straight-through double spiral-flow double pipe heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97213320 CN2293789Y (en) | 1997-04-18 | 1997-04-18 | Straight-through double spiral-flow double pipe heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2293789Y true CN2293789Y (en) | 1998-10-07 |
Family
ID=33931143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97213320 Expired - Fee Related CN2293789Y (en) | 1997-04-18 | 1997-04-18 | Straight-through double spiral-flow double pipe heat exchanger |
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| Country | Link |
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| CN (1) | CN2293789Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103234373A (en) * | 2013-03-26 | 2013-08-07 | 中山市多创电器设备有限公司 | Energy-saving waste heat recovery air heater for boiler |
| CN104501479A (en) * | 2014-12-24 | 2015-04-08 | 武汉浩宏科技有限公司 | Double-spiral type condenser and air-source water heater comprising same |
| WO2016029571A1 (en) * | 2014-08-27 | 2016-03-03 | 泰州市沪江特种设备有限公司 | Corrosion-resistant heat-pump type horizontal double-pipe heat exchanger |
| CN106595342A (en) * | 2016-12-23 | 2017-04-26 | 广西彩洁生物质科技有限公司 | Cooling unit |
| CN110285694A (en) * | 2019-06-19 | 2019-09-27 | 武汉方特工业设备技术有限公司 | Coiled channel heat exchanger |
| CN110567288A (en) * | 2019-08-16 | 2019-12-13 | 新疆金禾山能源科技有限公司 | Condensation heat exchanger for flue gas dehumidification and whitening |
| CN113465410A (en) * | 2021-07-06 | 2021-10-01 | 长沙理工大学 | Waste heat recycling heat exchanger and operation method thereof |
| CN113532157A (en) * | 2020-10-27 | 2021-10-22 | 江苏布林克曼节能科技有限公司 | Novel pipeline type fin spiral-flow heat exchanger |
-
1997
- 1997-04-18 CN CN 97213320 patent/CN2293789Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103234373A (en) * | 2013-03-26 | 2013-08-07 | 中山市多创电器设备有限公司 | Energy-saving waste heat recovery air heater for boiler |
| CN103234373B (en) * | 2013-03-26 | 2015-12-02 | 中山市多创电器设备有限公司 | Boiler energy-saving waste heat recovery air heater |
| WO2016029571A1 (en) * | 2014-08-27 | 2016-03-03 | 泰州市沪江特种设备有限公司 | Corrosion-resistant heat-pump type horizontal double-pipe heat exchanger |
| CN104501479A (en) * | 2014-12-24 | 2015-04-08 | 武汉浩宏科技有限公司 | Double-spiral type condenser and air-source water heater comprising same |
| CN106595342A (en) * | 2016-12-23 | 2017-04-26 | 广西彩洁生物质科技有限公司 | Cooling unit |
| CN110285694A (en) * | 2019-06-19 | 2019-09-27 | 武汉方特工业设备技术有限公司 | Coiled channel heat exchanger |
| CN110285694B (en) * | 2019-06-19 | 2024-03-12 | 武汉方特工业设备技术有限公司 | Coiled pipe type channel heat exchanger |
| CN110567288A (en) * | 2019-08-16 | 2019-12-13 | 新疆金禾山能源科技有限公司 | Condensation heat exchanger for flue gas dehumidification and whitening |
| CN110567288B (en) * | 2019-08-16 | 2020-11-20 | 新疆金禾山能源科技有限公司 | Condensation heat exchanger for flue gas dehumidification and whitening |
| CN113532157A (en) * | 2020-10-27 | 2021-10-22 | 江苏布林克曼节能科技有限公司 | Novel pipeline type fin spiral-flow heat exchanger |
| CN113465410A (en) * | 2021-07-06 | 2021-10-01 | 长沙理工大学 | Waste heat recycling heat exchanger and operation method thereof |
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