CN1151012A - Micromembrane evaporative condenser - Google Patents
Micromembrane evaporative condenser Download PDFInfo
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- CN1151012A CN1151012A CN 96118824 CN96118824A CN1151012A CN 1151012 A CN1151012 A CN 1151012A CN 96118824 CN96118824 CN 96118824 CN 96118824 A CN96118824 A CN 96118824A CN 1151012 A CN1151012 A CN 1151012A
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- fin
- heat
- evaporation
- exchange element
- fluid infusion
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Abstract
A microfilm evaporation condenser is equipped with vapour admission distributor at the upper part, collected liquid discharge tube at the lower part, and 35-50 layers of finned heat exchange elements in the central part used as evaporation channel and connected to the finned heat exchange element as condense channel. Its advantages include high heat conductivity, and small temp difference for heat transfer.
Description
The present invention relates to a kind of novel plate-fin condenser/evaporator, belong to the Engineering Thermophysics and the energy and utilize ambit.
Plate-fin heat exchanger begins to enter cryogenic engineering fields such as air separation from the fifties, it is compared with light pipe formula heat exchanger, it is comparatively compact to have structure, heat transfer coefficient is higher, advantages such as maintenance and cleaning are convenient, thereby the main condenser evaporimeter in the domestic and international large and medium-sized air separation unit has adopted plate-fin heat exchanger mostly.But, in small-sized air separation unit, fail to be applied always, and adopt light pipe formula condenser/evaporator always.Afterwards, Hang Yangchang quoted the consistent in the world the highest sintered porous surperficial tubular type condenser/evaporator of heat transfer coefficient that is known as at present.But, because sintered porous surface pipe exists manufacturing process very complicated, the manufacturing cost height, heating surface easily comes off and loses lasting heat conduction reinforced effect.In addition, also have the fluid vulnerable to pollution, blocking pipe or the like defective has greatly limited its promotion and application in the engineering field.(the upper and lower volume of list of references " 1 " " Cryo Fundamentals and device ", Zhang Zhiyou, the Shi Bingsan chief editor, China Machine Press publishes; List of references " 2 " " cryogenic heat exchanger ", the Chen Changqing chief editor, China Machine Press publishes)
Purpose of the present invention is intended to overcome light pipe formula condenser/evaporator, board-like condenser/evaporator and the existing defective of sintered porous surperficial tubular type condenser/evaporator, propose a kind of close pitch fin structure and mocromembrane condenser/evaporator, the heat transfer property of whole oxygenerator is greatly improved with repeatedly fluid infusion.
The present invention has heat transfer coefficient height, little two characteristics that advantage all possesses of heat transfer temperature difference.The present invention is applicable to cryogens such as liquid oxygen, liquid nitrogen and liquid argons, also applicable to working medium fluids such as freon and water.This heat exchanger not only is suitable for small-sized air separation unit, also is suitable for the condensation and the boiling heat transfer of production fields such as refrigeration, oil, chemical industry, nuclear power.
Fig. 1 is a perspective view of the present invention.
Fig. 2 is the structural representation of evaporation and heat-exchange element (1).
Fig. 3 is the structural representation of condensing heat-exchange element (2).
Fig. 4 is a cross-sectional structure schematic diagram of the present invention.
Below in conjunction with accompanying drawing structural principle of the present invention and operation principle are done detailed explanation.
Referring to Fig. 1, the present invention includes the plate fin heat-exchanging element of using as evaporation channel by 35～50 layers (1), heat exchange element (1) is connected with the plate fin heat-exchanging element of using as condensation channel (2).Liquid (liquid oxygen) is entered in the evaporation channel by the bottom liquid import department (10) of heat exchange element (1) and evaporates, and is discharged by the exit, top (9) of heat exchange element (1).Condensed gas (nitrogen) is entered condensation in the passage of condensing heat-exchange element (2) by condensation channel pod apertures (4) by the top air inlet distributor (5) of condensing heat-exchange element (2), condensed liquid flows to liquid collecting fairlead (6) by the liquid collecting hole (7) of condensation channel bottom.In addition, among Fig. 1, (3) are the fluid infusion holes, middle part of evaporation channel, and (8) are outer panels.
Referring to Fig. 2, the fin (13) in the evaporation and heat-exchange element (1) is divided into 2～3 sections by fluid infusion hole (3), every segment length 200～400mm.Fluid infusion groove (26) height is 20～50mm.The pitch of the fin (13) of close strip of paper used for sealing (14) is less, and the height of its fin is below the 6mm, and pitch is below the 1.2mm.The core of evaporation and heat-exchange element (1) is the wide non-finned straight channel (25) of 20～50mm, or prepare the usefulness that wide fin channels (25) is done fluid infusion, this wide fin pitch is 1.2～3.5mm, and the fin height is below the 6mm, and this wide fin channels overall width is 20～50mm.Among the figure, (12) are the last flow deflector of evaporation channel, and (15) are the following flow deflectors of evaporation channel.
Referring to Fig. 3, condensing heat-exchange element (2) is the monoblock type condensation channel of upper and lower perforation, and its top comprises air inlet flow deflector (17).The top of flow deflector (17) disposes strip of paper used for sealing (16), and its underpart is connected with condensing fin (18).Dispose fluid flow deflector (20) in the bottom of fin (18).Among the figure, (19) are the side seal bar of condensation channel, and (21) are the following strip of paper used for sealing of condensation channel.
Referring to Fig. 4, the present invention includes the plate fin heat-exchanging element of using by 35～50 layers evaporation channel (1), with the plate fin heat-exchanging element of using as condensation channel (2), be connected by dividing plate (23), be spaced successively one by one, the outside of its outermost condensing heat-exchange element (2) links to each other with outer panel (22), and its inboard links to each other with dividing plate (23), and its two ends, left and right sides are strip of paper used for sealing (19).Evaporation and heat-exchange element (1) left and right sides is a close pitch fin (13), and its fin pitch is below the 1.2mm, and fin height is below the 6mm, and the intermediate portion is divided into non-finned straight channel (25), and channel width is 20～50mm.The fin (18) of condensing heat-exchange element (2), its fin height is 3～6.5mm, pitch is below the 1.5mm.
Operation principle of the present invention is: high pressure gas nitrogen is entered in the condensing fin passage (18) by last flow deflector (17), under certain working pressure, nitrogen is condensation constantly on wall, condensed liquid nitrogen flows out through the liquid nitrogen exit of the following flow deflector (20) of condensing heat-exchange element (2) from top to bottom.Liquid oxygen flows into evaporation fin channels (13) by the following flow deflector (15) of evaporation and heat-exchange element (1), and relies on the thermal siphon driving force of fluid to make it flow into the top of evaporation fin channels (13) from bottom to top automatically.Simultaneously, the fluid infusion hole (3) that liquid oxygen also will be opened from the left and right sides, middle part of evaporation and heat-exchange element (1) flows in the evaporation fin channels (13), to guarantee that top evaporation fin channels is in moistening and the good heat transfer state all the time, avoids the heat transfer deterioration phenomenon of dryouting.The heat that liquid oxygen is discharged when the wall by strip of paper used for sealing (23) absorbs adjacent condensing fin passage (18) inner high voltage nitrogen condensation in evaporation fin channels (13), the continuous evaporation becomes gas.Oxygen after the evaporation is discharged by the last flow deflector (12) of evaporation and heat-exchange element (1), and so constantly circulation is carried out.The extruding that formed steam bubble constantly is subjected to the slit wall when evaporating in the slit evaporation channel owing to liquid oxygen is deformed into flat steam bubble, thereby make one deck liquid film between steam bubble bottom and the wall become very thin (reaching μ m level), the thermal resistance of boiling heat transfer is greatly reduced, thereby improve heat transfer coefficient greatly, reduce heat transfer temperature difference.
Experimental results show that:
1. use the present invention in the oxygenerator of 150 cubes of oxygen per hour, under nominal situation, can make the oxygenerator oxygen output reach 160m
3/ h, nitrogen output reaches 600m
3/ h, oxygen purity reaches 99.70%, and liquid oxygen purity is more than 99.99%.
2. the present invention moves under design conditions, and its heat transfer temperature difference is below 1.25K, and former design standard is 1.3～1.6K.Its heat flow density (calculating by unit dividing plate area) design load is 7Kw/m
2
3. the 150m that once moved of the present invention and Hangzhou Oxygen Production Machine Factory
3The used board-like condenser/evaporator performance of/h oxygenerator is compared, and its heat transfer coefficient improves 50%, and its weight and volume all reduces 30%, like this, the consumption of non-ferrous metal is also greatly reduced.
4. the present invention compares with existing sintered porous surperficial tubular type condenser/evaporator, but more than 20,000 yuan of every reduction of expenditure of manufacturing cost.
The present invention is also applicable to the heat transmission equipment in engineering fields such as thermal power plant, oil, chemical industry, refrigeration, low temperature.
Claims (6)
1. micromembrane evaporative condenser, top disposes air inlet distributor (5), its underpart disposes liquid collecting fairlead (6), feature of the present invention is, its center main part disposes 35～50 layers of plate fin heat-exchanging element (1) of using as evaporation channel, and it is connected in the plate fin heat-exchanging element of using as condensation channel (2).
2. according to the described condenser of claim 1, it is characterized in that, the fin height of the fin (13) of said evaporation and heat-exchange element (1) is below the 6mm, its fin pitch is below the 1.2mm, and wide fin (25) pitch of mid portion is 1.2～3.5mm, the wing height is below the 6mm, and width is 20～50mm.
3. according to claim 1,2 described condensers, it is characterized in that fine pith fin (13) in the said evaporation and heat-exchange element (1) and wide pitch fin (25) are divided at least two sections by fluid infusion hole (3) and fluid infusion groove (26), every segment length 200～400mm.
4. according to claim 1,2 described condensers, it is characterized in that said evaporation and heat-exchange element (1) both sides are provided with side direction fluid infusion hole (3) and horizontal fluid infusion groove (26), the high 20～50mm of groove.
5. according to claim 1,2 described condensers, it is characterized in that the middle part of said evaporation and heat-exchange element (1) disposes vertical fluid infusion passage (25), width is 20～50mm.
6. according to claim 1,2 described condensers, it is characterized in that the fin height of said condensing heat-exchange element (2) is below the 6.5mm, pitch is below the 1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96118824 CN1151012A (en) | 1996-09-10 | 1996-09-10 | Micromembrane evaporative condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96118824 CN1151012A (en) | 1996-09-10 | 1996-09-10 | Micromembrane evaporative condenser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1151012A true CN1151012A (en) | 1997-06-04 |
Family
ID=5125381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96118824 Pending CN1151012A (en) | 1996-09-10 | 1996-09-10 | Micromembrane evaporative condenser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1151012A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101600928B (en) * | 2007-02-02 | 2011-09-07 | 西门子公司 | Evaporative cooler and use thereof and gas turbine device comprising an evaporative cooler |
| CN107388861A (en) * | 2017-08-21 | 2017-11-24 | 湖南创化低碳环保科技有限公司 | Hot wall type heat exchanger |
-
1996
- 1996-09-10 CN CN 96118824 patent/CN1151012A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101600928B (en) * | 2007-02-02 | 2011-09-07 | 西门子公司 | Evaporative cooler and use thereof and gas turbine device comprising an evaporative cooler |
| CN107388861A (en) * | 2017-08-21 | 2017-11-24 | 湖南创化低碳环保科技有限公司 | Hot wall type heat exchanger |
| CN107388861B (en) * | 2017-08-21 | 2023-08-22 | 湖南创化低碳环保科技有限公司 | Hot wall type heat exchanger |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |