CN203687731U - Built-in multilevel jet flow pipe type fin heat exchange pipe - Google Patents
Built-in multilevel jet flow pipe type fin heat exchange pipe Download PDFInfo
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- CN203687731U CN203687731U CN201420055046.9U CN201420055046U CN203687731U CN 203687731 U CN203687731 U CN 203687731U CN 201420055046 U CN201420055046 U CN 201420055046U CN 203687731 U CN203687731 U CN 203687731U
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- heat exchange
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- 239000012530 fluid Substances 0.000 claims abstract description 32
- 238000003466 welding Methods 0.000 claims abstract description 12
- 239000007921 spray Substances 0.000 claims description 30
- 238000012546 transfer Methods 0.000 abstract description 34
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000007789 sealing Methods 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 230000003416 augmentation Effects 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 230000005855 radiation Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000009776 industrial production Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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Abstract
The utility model provides a built-in multilevel jet flow pipe type fin heat exchange pipe which comprises a fin pipe body and multilevel jet flow pipes which are arranged in the fin pipe. The multilevel jet flow pipes comprise at least two sublevel jet flow pipes which are coaxially in series connection, openings are formed in one ends of the sublevel jet flow pipes, an annular sealing cover is welded to the outer walls of the opened ends, a base cover is welded to the other ends of the sublevel jet flow pipes, the orientation of the opened ends of the sublevel jet flow pipes is consistent, and is opposite to the cold fluid flow direction, a gap is reserved between one sublevel jet flow pipe and the adjacent sublevel jet flow pipe, and the adjacent sublevel jet flow pipes are fixedly in series connection through a pull rod to form the multilevel jet flow pipes, and spraying holes are formed in the walls of the sublevel jet flow pipes. The multilevel jet flow pipes are adopted in the pipe so as to enhance heat convection, welding fins are adopted outside the pipe so as to enhance heat transfer in the mode of increasing the heat exchange area, the total heat exchange efficiency is obviously improved, the heat exchange pipes can be in parallel connection according to the production process requirements, and the pipes can be flexibly designed to be large, medium and small type heat exchangers.
Description
Technical field
The utility model relates to the heat transmission equipment in multiple fields such as chemical industry, metallurgy and energy-conserving and environment-protective, relates in particular to a kind of built-in multistage jet flow tubular type fin heat exchange pipe.
Background technology
Along with developing rapidly of modern industry, countries in the world are generally faced with shortage of energy problem, tap a new source of energy and how efficiently to utilize the existing energy to obtain the common concern of countries in the world.Due to the extensive use of heat transmission equipment in industrial production, improve heat exchanger efficiency, the new technology of research enhanced heat exchange becomes the new problem of thermal conduction study of people's growing interest.Not only energy-conserving and environment-protective of the application of augmentation of heat transfer technology, and saved investment and operation cost.
According to statistics, in steam power plant, if using boiler also as heat transmission equipment, the investment of heat exchanger accounts for 70% left and right of whole power plant gross investment.In modern petrochemical enterprise, the investment of heat exchanger accounts for 30%～40% of plant construction gross investment.The research to new and effective heat transmission equipment is constantly being engaged in countries in the world, to improving heat utilization rate, constantly reduce the consumption of natural energy source, therefore heat exchanger has very important material impact aspect the construction investment of minimizing enterprise and the economic benefit of raising enterprise.
1, the object of augmentation of heat transfer
(1) reduce the just heat transfer area of design, to reduce the volume and weight of heat exchanger;
(2) improve the exchange capability of heat of existing heat exchanger;
(3) make the heat exchanger can be in the poor lower work of lower temperature;
(4) reduce heat exchanger resistance, to reduce the power consumption of heat exchanger.
2, the augmentation of heat transfer approach of surface-type heat exchanger
Heat output when heat exchanger steady heat transfer can be expressed as with the heat transfer equation in thermal conduction study:
Q=kAΔT （1）
In formula, Q-heat output, W;
K-heat transfer coefficient, W/ (m
2k);
A-heat exchange area, m
2;
The mean temperature difference of Δ T-cold fluid and hot fluid, K.
Formula (1) shows, make diabatic process strengthening in heat exchanger, can realize by three kinds of approach, that is: increase mean temperature difference, increase heat exchange area and improve the coefficient of heat transfer.
According to the difference of fluid flow state, monophasic fluid is also difference of mobile augmentation of heat transfer means in pipe.For the heat exchange of strengthening Laminar Flow, should, take the flow regime of change fluid as Main Means, make fluid become turbulent flow.For the heat exchange of strengthening turbulent flow, main principle should be the thickness of attenuated layer laminar sublayer.Adopting injection heat transfer is one of effective way of strengthening intraductal heat exchange.
The operation principle of injection heat transfer is: flow of heated fluid is through heat exchanger, heat is passed to the outer tube of heat exchanger tube, cold fluid flow to jet pipe through packaged air conditioner, vertically spray at a high speed again the inner surface of outer tube from spray orifice, under the percussion of air-flow, laminar boundary layer turbulent flowization between cold fluid and outer pipe internal surface, thereby strengthened convection heat transfer' heat-transfer by convection, improve efficiency of heat exchanger.
In current industrial production, often adopt the described efflux heat-exchanger of metallurgical publishing house " heat-exchange device used for industrial furnace " in 1986, its structure is made up of three layers of concentric tubes and flue gas and hot-air outlet box.Inner tube is air jet pipe, and outer tube is flue gas jet pipe, and intermediate casing is heat-exchange tube.Air vertically sprays to the inner surface of heat-exchange tube from the spurt hole of inner tube sidewall, the outer surface that flue gas vertically sprays to heat-exchange tube from the spray orifice of outer tube wall adds hot-air, and the air after being heated is along flowing vertically upward in the annular space between inner tube and heat-exchange tube.Owing to adopting a jet flow, hot-air fluid layer must affect the effect of injection heat transfer.Be difficult to improve preheating of air temperature.Simultaneously outer tube flue gas jet flow need be joined the heat resisting exhauster flue gas pressures that raises and also had certain technical difficulty, also affects the service life of heat resisting exhauster.
Number of patent application is that 201110143926.2 " heat exchanger tube capable of realizing same inlet/outlet temperature difference jet type air preheaters ", number of patent application are that 91205751.3 " single tube insert type bar-shaped heat exchangers ", number of patent application are that the item patents such as 87208214.8 " a kind of spray type pipe heat exchangers " are and in heat exchanger tube, take eruption mode to carry out enhanced heat exchange, and do not take enhanced heat exchange measure outward at heat exchanger tube, therefore cannot significantly improve integrated heat transfer coefficient.
Number of patent application is 201210226605.3 " triple-travel air preheat radiation pipe burner tip heat exchangers ", number of patent application is 201210226661.7 " two-pass air preheat radiation pipe burner tip heat exchangers ", number of patent application is 201210267069.1 " the two preheating secondary injection formula radiation pipe burner tip heat exchangers of space gas and heat-exchange methods ", number of patent application is 201210268147.x " the two preheating fin tube type radiation pipe burner tip heat exchangers of space gas and heat-exchange method ", number of patent application is that the item patents such as 201220373278.x " with the radiation pipe burner tip heat exchanger of finned tube " are microminiature burner heat exchanger, complex structure, and all need to adopt numerical control fine finishining, manufacturing cost costliness.Therefore, for the big-and-middle-sized heat exchanger being applied in industrial production, without actual application value.
Number of patent application is that 201110003743.0 " for the heat exchanger tube of evaporimeter and the evaporimeters of composition thereof " are the evaporimeters for refrigeration plant, outside pipe, do not take enhanced heat exchange measure, cannot significantly improve integrated heat transfer coefficient, therefore cannot be applied to the big-and-middle-sized heat exchanger that carries out waste heat recovery in industrial production.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the utility model provides a kind of built-in multistage jet flow tubular type fin heat exchange pipe, is provided with multistage jet pipe in pipe, has improved the convection transfer rate in pipe, has strengthened intraductal heat exchange; Outer wall at outer tube installs fin additional, has increased heat exchange area, has strengthened heat transfer outside a tube, in heat transfer equation in the situation that mean temperature difference is constant, both improved integrated heat transfer coefficient, increased again heat exchange area, improved the comprehensive heat exchange property of heat exchanger tube.
Built-in multistage jet flow tubular type fin heat exchange pipe provided by the utility model, comprises finned tube and is arranged on the jet pipe in finned tube, it is characterized in that: described jet pipe is multistage jet pipe, comprises the sub level jet pipe of at least two concentric serial connections.
Further, one end of each sub level jet pipe is uncovered, and the other end is provided with bottom sealing, and each sub level jet pipe opening end is towards unanimously, and contrary with the flow direction of cold fluid; Between adjacent two sub level jet pipes, stay at regular intervalsly, and be integrated by the fixing serial connection of a pull bar; Each sub level jet pipe is provided with annular capping near the outer wall at its opening end place, and this annular capping circumferentially contacts with finned tube inwall; The opening area of the spray orifice of each sub level jet pipe is limited on the tube wall between described annular capping and bottom.
Further, be arranged at the first order sub level jet pipe of cold fluid arrival end, its annular capping flushes and welds with described finned tube end surfaces, and annular capping and the described finned tube of all the other sub level jet pipes do not weld.Cold fluid flow is in the time of heat exchanger tube, directly enter from the opening end of first order sub level jet pipe, and spray to the internal face of finned tube by spray orifice, carry out high efficient heat exchanging, and by the opening end of annular crack inflow next stage sub level jet pipe, so repeat step by step above-mentioned enhanced heat exchange process.
Further, each sub level jet pipe and described finned tube are coaxially installed; Described pull bar is arranged at each sub level jet pipe bottom shaft core position and welds.
Further, the aperture of described spray orifice is 1～10mm; The percent opening of the spray orifice of described each sub level jet pipe is 10%～30%(note: percent opening refers to the nozzle hole area offered on this sub level jet pipe and the ratio with this sub level jet pipe surface area).
Further, every grade of sub level jet pipe of interior cross-sectional area ≈ of the long-pending every grade of sub level jet pipe of ≈ of the circular cylindrical cross-section between described finned tube and sub level jet pipe offer between the area sub level jet pipe adjacent with ≈ of spray orifice imagination that exist with the surface area isodiametric pipe of sub level jet pipe.
Further, the fin welding in the outside wall surface of described finned tube is ratio-frequency welding helical fin or nest plate.Finned tube can level, vertical or be in tilted layout.The height of fin is 5～30mm, and pitch is 5～25mm, and thickness is 0.5～5mm.
The manufacturing process of built-in multistage jet flow tubular type fin heat exchange pipe described in the utility model, comprises the following steps:
(1) making of finned tube: the finned tube of making required specification by manufacturing technique requirent;
(2) making of each sub level jet pipe: at one end of sub level jet pipe welding bottom, bottom is opened centre bore, and the other end is uncovered; Annular capping is welded on the outer wall of described sub level jet pipe opening end again, and offers spray orifice on the tube wall of the sub level jet pipe between described bottom and annular capping;
(3) assembly welding of multistage jet pipe: pull bar, through the centre bore of each sub level jet pipe bottom, is guaranteed to each sub level jet pipe opening end is towards unanimously, then the bottom of pull bar and each sub level jet pipe is welded step by step, and serial connection is integrated, and becomes multistage jet pipe; Between adjacent sub level jet pipe, stay at regular intervals;
(4) assembling of built-in multistage jet flow tubular type fin heat exchange pipe: multistage jet pipe is inserted to the inside of finned tube, guarantee that the opening end of each sub level jet pipe is contrary with the flow direction of cold fluid; First order sub level jet pipe is placed in cold fluid arrival end, and its annular capping flushes and welds with described finned tube end surfaces, and annular capping and the finned tube inner surface of all the other each sub level jet pipes all do not weld.
Compared with prior art, tool has the following advantages the utility model:
1, in heat exchanger tube, adopt multistage jet pipe, cold fluid enters first order jet pipe from the arrival end of fin heat exchange pipe, the inner surface that vertically sprays to finned tube from spray orifice again carries out high efficient heat exchanging, and flow through step by step successively jet pipes at different levels, carry out flowing out from the other end of fin heat exchange pipe after heat exchange with horizontal hot fluid of plunderring finned tube outer surface, laminar boundary layer turbulent flowization between cold fluid and finned tube inner surface, thereby strengthened convection heat transfer' heat-transfer by convection, improve heat exchange efficiency.
2, heat exchange pipe external surface adopts extended surface method to form finned tube, has expanded the heat exchange area of heat-transfer surface, and promotes the disturbance of hot fluid and reduce heat transfer resistance, has effectively increased heat transfer coefficient, thereby has increased heat output, augmentation of heat transfer.
3, built-in multistage jet flow tubular type fin heat exchange pipe provided by the utility model, as a kind of high-performance heat transfer components, can adopt parallel way, flexible design to become large, medium and small type heat exchanger as required, is applied to required production link.
Accompanying drawing explanation
Fig. 1 is built-in multistage jet flow tubular type fin heat exchange pipe structural representation described in the utility model;
Fig. 2 is multistage jet pipe structural representation described in the utility model.
In figure: 1-finned tube; 2-fin; The multistage jet pipe of 3-; 4-spray orifice; 5-bottom; 6-pull bar; The capping of 7-annular; 8-first order sub level jet pipe.
The specific embodiment
As shown in Figure 1, 2, built-in multistage jet flow tubular type fin heat exchange pipe provided by the utility model, comprises finned tube 1, and multistage jet pipe 3 is installed in the inside of finned tube, and multistage jet pipe 3 comprises the sub level jet pipe of at least two concentric serial connections; One end of each sub level jet pipe is uncovered, and on the outer wall at opening end place, welds annular capping 7, and other end welding has the bottom 5 of centre bore, and each sub level jet pipe opening end is towards unanimously, contrary with the flow direction of cold fluid; Centre bore by pull bar 6 through each sub level jet pipe bottom 5, guarantees to stay between adjacent two sub level jet pipes at regular intervals, then pull bar 6 and the bottom 5 of each sub level jet pipe is welded step by step, and serial connection is integrated, and becomes multistage jet pipe 3.On tube wall between annular capping 7 and the bottom 5 of each sub level jet pipe, offer spray orifice 4.The aperture of spray orifice 4 can be 1～10mm, and the percent opening of the spray orifice of each sub level jet pipe is 10%～30%, the nozzle hole area of offering on this sub level jet pipe and with the ratio of this sub level jet pipe surface area be 10%-30%.
Be arranged at the annular capping 7 of the first order sub level jet pipe 8 of cold fluid arrival end, flush and weld with the end surfaces of described finned tube 1, the annular capping 7 of all the other each sub level jet pipes is not all welded with the inner surface of finned tube 1.
The fin 2 welding in the outside wall surface of finned tube 1 is ratio-frequency welding helical fin or nest plate, and the height of fin is 5～30mm, and pitch is 5～25mm, and thickness is 0.5～5mm.Finned tube 1 can level, vertical or be in tilted layout.
The progression of the multistage jet pipe 3 in the utility model is determined according to the resistance drop of the flow of cold and hot fluid and heat-exchange system.If the flow of cold and hot fluid is larger, and resistance drop allows when larger, and progression can suitably increase.Between described finned tube 1 and sub level jet pipe every grade of sub level jet pipe of interior cross-sectional area ≈ of the long-pending every grade of sub level jet pipe of ≈ of the circular cylindrical cross-section of (, and between multistage jet pipe 3) offer between the area sub level jet pipe adjacent with ≈ of spray orifice imagination that exist with surface area (referring to the surface area of the pipe shown in dotted line A in accompanying drawing 2) the isodiametric pipe of sub level jet pipe.Conventionally on certain one-level sub level jet pipe, offer multiple spray orifices, so-called every grade of sub level jet pipe offer spray orifice area and, refer to the area sum of the multiple spray orifices on this sub level jet pipe.
The manufacturing process of built-in multistage jet flow tubular type fin heat exchange pipe provided by the utility model, comprises the following steps:
(1) making of finned tube 1: the finned tube 1 of making required specification by manufacturing technique requirent;
(2) making of each sub level jet pipe: at one end of sub level jet pipe welding bottom 5, bottom 5 is opened centre bore, and the other end is uncovered; Again annular capping 7 is welded on the outer wall of described sub level jet pipe opening end, and offers spray orifice 4 on the tube wall of the sub level jet pipe between described bottom 5 and annular capping 7;
(3) assembly welding of multistage jet pipe 3: the centre bore by pull bar 6 through each sub level jet pipe bottom 5, guarantee that each sub level jet pipe opening end is towards unanimously, pull bar 6 and the bottom 5 of each sub level jet pipe are welded step by step, serial connection is integrated, and becomes multistage jet pipe 3 again.Between adjacent two sub level jet pipes, stay at regular intervals;
(4) assembling of built-in multistage jet flow tubular type fin heat exchange pipe and manufacturing process thereof: the inside that multistage jet pipe 3 is inserted to finned tube 1, guarantee that the opening end of each sub level jet pipe is contrary with the flow direction of cold fluid.First order sub level jet pipe 8 is placed in cold fluid arrival end, and its annular capping 7 flushes and welds with described finned tube 1 end surfaces, and annular capping 7 and finned tube 1 inner surface of all the other each sub level jet pipes all do not weld.
The utility model specific works mode is: cold fluid directly enters the opening end of first order sub level jet pipe 8, the inner surface that vertically sprays to finned tube 1 from spray orifice 4 again carries out high efficient heat exchanging, and flow through step by step successively each sub level jet pipe, carry out after heat exchange with horizontal hot fluid of plunderring finned tube 1 outer surface, then flow out from the other end of fin heat exchange pipe.Laminar boundary layer turbulent flowization between cold fluid and finned tube 1 inner surface, thereby strengthened convection heat transfer' heat-transfer by convection, improve heat exchange efficiency.
Heat exchange pipe external surface adopts extended surface method to form finned tube 1, has expanded the heat exchange area outside pipe, and promotes the disturbance of hot fluid and reduce heat transfer resistance, has effectively increased heat transfer coefficient, thereby has increased heat output, augmentation of heat transfer.
The utility model pipe in, manage outside all carried out augmentation of heat transfer, total heat exchange efficiency is able to significant raising.
Claims (7)
1. a built-in multistage jet flow tubular type fin heat exchange pipe, comprises finned tube and is arranged on the jet pipe in finned tube, it is characterized in that: described jet pipe is multistage jet pipe, comprises the sub level jet pipe of at least two concentric serial connections.
2. built-in multistage jet flow tubular type fin heat exchange pipe as claimed in claim 1, is characterized in that: one end of described each sub level jet pipe is uncovered, and the other end seals with bottom, each sub level jet pipe opening end towards unanimously, and contrary with the flow direction of cold fluid; Between adjacent sub level jet pipe, leave gap, and be integrated by the fixing serial connection of a pull bar; The outer wall at each sub level jet pipe opening end place is provided with annular capping, and this annular capping circumferentially contacts with finned tube inwall; The opening area of the spray orifice of each sub level jet pipe is limited on the tube wall between described annular capping and bottom.
3. built-in multistage jet flow tubular type fin heat exchange pipe as claimed in claim 2, it is characterized in that: the first order sub level jet pipe that is arranged at cold fluid arrival end, its annular capping flushes and welds with the end surfaces of described finned tube, and annular capping and the described finned tube of all the other sub level jet pipes do not weld.
4. built-in multistage jet flow tubular type fin heat exchange pipe as claimed in claim 2 or claim 3, is characterized in that: each sub level jet pipe and described finned tube are coaxially installed; Described pull bar is arranged at each sub level jet pipe bottom shaft core position and welds.
5. built-in multistage jet flow tubular type fin heat exchange pipe as claimed in claim 2 or claim 3, is characterized in that: the aperture of described spray orifice is 1～10mm; The percent opening of the spray orifice of described each sub level jet pipe is 10%～30%.
6. the built-in multistage jet flow tubular type fin heat exchange pipe as described in claim 1,2 or 3, is characterized in that: every grade of sub level jet pipe of interior cross-sectional area ≈ of the long-pending every grade of sub level jet pipe of ≈ of circular cylindrical cross-section between described finned tube and sub level jet pipe offer between the area sub level jet pipe adjacent with ≈ of spray orifice imagination that exist with the surface area isodiametric pipe of sub level jet pipe.
7. the built-in multistage jet flow tubular type fin heat exchange pipe as described in claim 1,2 or 3, it is characterized in that: the fin welding in the outside wall surface of described finned tube is ratio-frequency welding helical fin or nest plate, the height of fin is 5～30mm, and pitch is 5～25mm, and thickness is 0.5～5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420055046.9U CN203687731U (en) | 2014-01-28 | 2014-01-28 | Built-in multilevel jet flow pipe type fin heat exchange pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420055046.9U CN203687731U (en) | 2014-01-28 | 2014-01-28 | Built-in multilevel jet flow pipe type fin heat exchange pipe |
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| CN203687731U true CN203687731U (en) | 2014-07-02 |
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| CN201420055046.9U Expired - Lifetime CN203687731U (en) | 2014-01-28 | 2014-01-28 | Built-in multilevel jet flow pipe type fin heat exchange pipe |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501614A (en) * | 2014-12-23 | 2015-04-08 | 苏州医电神空调设备工程有限公司 | Vertical vapor heat exchanger rapid in heat exchange |
| CN104807359B (en) * | 2014-01-28 | 2017-12-08 | 南京圣诺热管有限公司 | Built-in multistage jet flow tubular type fin heat exchange pipe and its manufacturing process |
| CN114777534A (en) * | 2022-03-30 | 2022-07-22 | 三江乐天化工有限公司 | Cooling device for lean absorption liquid in ethylene oxide production system |
-
2014
- 2014-01-28 CN CN201420055046.9U patent/CN203687731U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807359B (en) * | 2014-01-28 | 2017-12-08 | 南京圣诺热管有限公司 | Built-in multistage jet flow tubular type fin heat exchange pipe and its manufacturing process |
| CN104501614A (en) * | 2014-12-23 | 2015-04-08 | 苏州医电神空调设备工程有限公司 | Vertical vapor heat exchanger rapid in heat exchange |
| CN114777534A (en) * | 2022-03-30 | 2022-07-22 | 三江乐天化工有限公司 | Cooling device for lean absorption liquid in ethylene oxide production system |
| CN114777534B (en) * | 2022-03-30 | 2023-10-27 | 浙江浩浩化工有限公司 | Cooling device for lean absorption liquid in ethylene oxide production system |
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Granted publication date: 20140702 |