CN110500783B - Heat transfer element for reducing thickness of liquid film of regenerative condensation heat exchanger - Google Patents
Heat transfer element for reducing thickness of liquid film of regenerative condensation heat exchanger Download PDFInfo
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- CN110500783B CN110500783B CN201910824751.8A CN201910824751A CN110500783B CN 110500783 B CN110500783 B CN 110500783B CN 201910824751 A CN201910824751 A CN 201910824751A CN 110500783 B CN110500783 B CN 110500783B
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- 238000009833 condensation Methods 0.000 title claims abstract description 44
- 230000005494 condensation Effects 0.000 title claims abstract description 44
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 37
- 239000007788 liquid Substances 0.000 title claims abstract description 34
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 33
- 239000003546 flue gas Substances 0.000 claims description 33
- 230000005484 gravity Effects 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 230000009977 dual effect Effects 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims 1
- 239000003570 air Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/04—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by preventing the formation of continuous films of condensate on heat-exchange surfaces, e.g. by promoting droplet formation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a heat transfer element for reducing the thickness of a liquid film of a regenerative condensation heat exchanger. The first corrugated plate is provided with an inverted double-herringbone corrugated flow channel, a first vertical trapezoidal corrugated channel and a first vertical flat plate; the second corrugated plate is provided with a double-herringbone corrugated flow channel, a second vertical trapezoidal corrugated channel and a second vertical flat plate. The first corrugated plate and the second corrugated plate are superposed to form a condensation heat transfer channel consisting of two different heat transfer channel units. When the condensation takes place, the flowing back speed of condensate is accelerated simultaneously to first buckled plate and second buckled plate, has thinned the thickness of condensate film, makes regenerative condensing heat exchanger condensation heat transfer ability obtain further promotion. The invention can accelerate the discharge of the condensate, reduce the thickness of the condensate film, strengthen the condensation heat transfer and further improve the comprehensive performance of the regenerative condensation heat exchanger.
Description
Technical Field
The invention belongs to the technical field of heat exchanger plates, and particularly relates to a heat transfer element for reducing the thickness of a liquid film of a regenerative condensing heat exchanger.
Background
The flue gas generated by combustion of the gas boiler has high water vapor content (the volume fraction is close to 20 percent), high heat content (containing a large amount of latent heat) and SOx、NOx、CO2Low content of pollutants such as CO and fly ash. The condensing heat exchanger is additionally arranged at the tail part of the gas boiler, so that the problem of serious low-temperature corrosion is avoided, and a large amount of moisture and flue gas waste heat in flue gas can be recovered. Therefore, the condensing heat exchanger is widely applied to the project of recovering and transforming the waste heat of the gas boiler.
At present, a finned tube condensing heat exchanger is generally adopted as main equipment for cooling and taking water from flue gas, but the finned tube heat exchanger has the problems of poor heat exchange effect, large heat exchanger volume, high manufacturing cost and the like. Therefore, in order to effectively cool the flue gas, collect water and recycle waste heat, a new regenerative condensing heat exchanger is proposed by scholars. The regenerative condensing heat exchanger is structurally divided into a flue gas sub-bin and an air sub-bin, dense heat transfer elements are arranged in the sub-bins, and ambient air is used as a cooling medium. Firstly, the heat transfer element firstly absorbs heat from the flue gas in the flue gas sub-bins to cool the flue gas, and water vapor in the wet flue gas is condensed on the surface of the heat transfer element, flows down along the heat transfer element and is collected by a water collecting device arranged below the flue gas sub-bins. The heat transfer element then transfers heat to the air in the air sub-compartment. And finally, discharging the cooled clean flue gas through a chimney, and reusing the heated cooling air.
Compared with the traditional finned tube condensation heat exchanger, the regenerative condensation heat exchanger has the advantages of simpler system, easily obtained cold source, higher heat exchange efficiency, more compact structure and the like. However, after the regenerative condensing heat exchanger is proposed, a corresponding heat transfer element suitable for the regenerative condensing heat exchanger is not provided, if the corrugated plate of the conventional regenerative heat exchanger is continuously used, although the heat exchange process of hot and humid gas can be efficiently conducted, condensate generated in the heat exchange process is attached to the surface of the corrugated plate and is not easy to discharge, the area and the thickness of a condensate film are increased continuously, the thermal resistance of condensing heat transfer is increased, and the condensing heat transfer is weakened. This inevitably affects further improvement of the overall performance of the regenerative condensing heat exchanger and further expansion of the application range. It is therefore important to provide a heat transfer element suitable for use in regenerative condensing heat exchangers that accelerates the rate of drainage of the condensate.
Disclosure of Invention
The invention provides a heat transfer element for reducing the thickness of a liquid film of a regenerative condensation heat exchanger, aiming at the problem that the regenerative condensation heat exchanger does not have a matched heat transfer element. The heat transfer element can accelerate the discharge of condensate, reduce the thickness of the condensate film and strengthen the condensation heat transfer, so that the comprehensive performance of the regenerative condensation heat exchanger is further improved.
The invention is realized by adopting the following technical scheme:
a heat transfer element for reducing the thickness of a liquid film of a regenerative condensing heat exchanger comprises a first corrugated plate and a second corrugated plate; wherein,
the first corrugated plate is provided with a series of inverted double-herringbone corrugated flow channels, a first vertical trapezoidal corrugated channel with a single wave peak and a single wave trough is additionally arranged at the symmetrical position of the inverted single-herringbone corrugated flow channel, and a first vertical flat plate is additionally arranged at the joint of two adjacent inverted double-herringbone corrugated flow channels;
a series of double herringbone corrugated flow channels are formed in the second corrugated plate, a second vertical trapezoidal corrugated channel with a single wave peak and a single wave trough is additionally arranged at the joint of two adjacent herringbone corrugated flow channels, and a second vertical flat plate is additionally arranged at the symmetrical position of the single herringbone corrugated flow channel;
the wave heights of the first vertical trapezoidal corrugated channel and the second vertical trapezoidal corrugated channel are the same;
the width of the upper trapezoid bottom of the first vertical trapezoid corrugated channel and the width of the lower trapezoid bottom of the second vertical trapezoid corrugated channel are the same as the widths of the first vertical flat plate and the second vertical flat plate, and the width of the lower trapezoid bottom is 1.1-1.5 times of the width of the upper trapezoid bottom;
the first corrugated plate and the second corrugated plate are periodically overlapped together to form a dense condensation heat transfer channel.
The invention is further improved in that the inclination angle of the first corrugated plate is 30-50 degrees.
The invention is further improved in that the wave height of the first vertical trapezoidal corrugated channel is 10 mm-25 mm.
The invention is further improved in that the width of the first vertical flat plate is 5 mm-10 mm.
The invention is further improved in that the inclination angle of the second corrugated plate is 30-50 degrees.
The invention is further improved in that the wave height of the second vertical trapezoidal corrugated channel is 10 mm-25 mm.
The invention is further improved in that the width of the second vertical flat plate is 5 mm-10 mm.
The invention is further improved in that the plate spacing between the first corrugated plate and the second corrugated plate is the wave height of the vertical trapezoidal corrugated channel.
The invention has the further improvement that the widths of the trapezoidal upper bottoms of the first vertical trapezoidal corrugated channel and the second vertical trapezoidal corrugated channel are the same as the widths of the first vertical flat plate and the second vertical flat plate, and the width of the trapezoidal lower bottom is 1.1-1.5 times of the width of the upper bottom.
The invention further improves that when in work, the first corrugated plate and the second corrugated plate are superposed, and two closed condensation heat transfer channels H1 and H2, H1 and H2 which are formed by the first corrugated plate, the first vertical trapezoidal corrugated channel, the first vertical flat plate, the second corrugated plate, the second vertical trapezoidal corrugated channel and the second vertical flat plate and have the same cross section area periodically form an integral condensation heat transfer channel.
When water vapor in wet flue gas is condensed in the H1 heat transfer channel, condensate formed on the first corrugated plate flows in the inverted herringbone flow channel and is rapidly converged on the first vertical trapezoidal corrugated channel additionally arranged at the symmetrical position of the single herringbone flow channel, and under the dual actions of gravity and flue gas carrying, the condensate is maximally accelerated on the first vertical trapezoidal corrugated channel, so that the liquid discharge rate of the condensate is increased; condensate formed on the second corrugated plate flows in the herringbone flow channel and is quickly gathered on the second vertical trapezoidal corrugated channel at the connection position of the two herringbone flow channels, under the action of the second vertical trapezoidal corrugated channel and the first vertical flat plate, one part of the condensate is transferred to the first corrugated plate and is quickly discharged from the inverted herringbone flow channel and the first vertical trapezoidal corrugated channel, and the other part of the condensate is quickly discharged along the second vertical trapezoidal corrugated channel under the action of gravity and flue gas carrying.
When water vapor in the wet flue gas is condensed in the H2 heat transfer channel, condensate formed on the second corrugated plate flows in the herringbone flow channel and is rapidly converged on the second vertical trapezoidal corrugated channel at the joint of the two herringbone flow channels, and the converged condensate further accelerates to flow on the vertical trapezoidal corrugated channel under the dual actions of gravity and flue gas carrying, so that the liquid discharge rate of the condensate is improved; condensate formed on the first corrugated plate flows in the inverted herringbone flow channel, quickly converges on the first vertical trapezoidal corrugated channel added at the symmetrical position of the single herringbone flow channel, under the action of the first vertical trapezoidal corrugated channel and the second vertical flat plate, one part of the condensate is transferred to the second corrugated plate and quickly discharged from the herringbone corrugated channel and the second vertical trapezoidal corrugated channel, and the other part of the condensate is quickly discharged along the first vertical trapezoidal corrugated channel under the action of gravity and carried smoke.
Finally, under the combined action of the first corrugated plate and the second corrugated plate, the liquid discharge speed of the regenerative condensing heat exchanger can be greatly improved, and the condensing heat transfer is enhanced.
The invention has the following beneficial technical effects:
the invention provides a heat transfer element for reducing the thickness of a liquid film of a regenerative condensation heat exchanger, which is characterized in that a first corrugated plate and a second corrugated plate are superposed during working, and two closed condensation heat transfer channels H1, H2, H1 and H2 which are formed by the first corrugated plate, a first vertical trapezoidal corrugated channel, a first vertical flat plate, the second corrugated plate, a second vertical trapezoidal corrugated channel and a second vertical flat plate and have the same cross-sectional area periodically form an integral condensation heat transfer channel.
When water vapor in wet flue gas is condensed in the H1 heat transfer channel, condensate formed on the first corrugated plate flows in the inverted herringbone flow channel, experiments prove that the condensate basically flows downwards along the wave trough of the corrugated plate on the corrugated plate, the flow pattern is approximately linear, the residence time of the condensate on the corrugated plate is reduced, the condensate is quickly converged on the first vertical trapezoidal corrugated channel additionally arranged at the symmetrical position of the single herringbone flow channel, and the condensate is maximally accelerated on the first vertical trapezoidal corrugated channel under the dual action of gravity and flue gas carrying, so that the liquid discharge rate of the condensate is increased; condensate formed on the second corrugated plate flows in the herringbone flow channel and is quickly gathered on a second vertical trapezoidal corrugated channel at the joint of the herringbone flow channel, under the action of the second vertical trapezoidal corrugated channel and the first vertical flat plate, one part of the condensate is transferred to the first corrugated plate and is quickly discharged from the inverted herringbone flow channel and the first vertical trapezoidal corrugated channel, and the other part of the condensate is quickly discharged along the second vertical trapezoidal corrugated channel under the action of gravity and carried smoke.
When water vapor in the wet flue gas is condensed in the H2 heat transfer channel, condensate formed on the second corrugated plate flows in the herringbone flow channel and is rapidly converged on the second vertical trapezoidal corrugated channel at the joint of the two herringbone flow channels, and the converged condensate further accelerates to flow on the vertical trapezoidal corrugated channel under the dual actions of gravity and flue gas carrying, so that the liquid discharge rate of the condensate is improved; condensate formed on the first corrugated plate flows in the inverted herringbone flow channel, quickly converges on the first vertical trapezoidal corrugated channel added at the symmetrical position of the single herringbone flow channel, under the action of the first vertical trapezoidal corrugated channel and the second vertical flat plate, one part of the condensate is transferred to the second corrugated plate and quickly discharged from the herringbone corrugated channel and the second vertical trapezoidal corrugated channel, and the other part of the condensate is quickly discharged along the first vertical trapezoidal corrugated channel under the action of gravity and carried smoke.
Finally, under the combined action of the first corrugated plate and the second corrugated plate, the liquid discharge speed of the regenerative condensing heat exchanger can be greatly improved, the thickness of a condensate film on the corrugated plate is reduced, and the condensation heat transfer is enhanced.
Further, the inclination angle of the first corrugated plate and the second corrugated plate is 30-50 degrees. Experiments prove that on a corrugated plate with a corrugation inclination angle of 30-50 degrees, the condensate basically flows downwards along the wave trough of the corrugated plate, the flow pattern is approximately linear, the residence time of the condensate on the corrugated plate is reduced, the drainage speed is higher, the thickness of a liquid film is smaller, and the condensation heat transfer is more facilitated.
Furthermore, a first vertical trapezoidal corrugated channel and a second vertical trapezoidal corrugated channel are respectively additionally arranged on the first corrugated plate and the second corrugated plate. The structure can further accelerate the liquid discharge rate of the condensate, reduce the retention time of the condensate on the corrugated plate and reduce the thickness of the condensate film. Meanwhile, the existence of the vertical corrugated structure can lead the first corrugated plate and the second corrugated plate to be directly and periodically superposed to form a condensation heat transfer channel, thereby reducing the fixing device required during installation.
Furthermore, a first vertical flat plate and a second vertical flat plate are additionally arranged on the first corrugated plate and the second corrugated plate respectively. When first buckled plate and second buckled plate superpose, first vertical dull and stereotyped and the vertical dull and stereotyped and first buckled plate of second, first vertical trapezoidal ripple passageway, second buckled plate, the vertical trapezoidal ripple passageway of second constitute two kinds of closed and the same condensation heat transfer passageway H1 of cross-sectional area and H2, ensure the condensation passageway that first buckled plate and second buckled plate constitute, can both accelerate the discharge of condensate under the dual function that gravity and flue gas carried.
Drawings
FIG. 1 is a schematic structural view of a first corrugated sheet;
FIG. 2 is a schematic structural view of a second corrugated sheet;
FIG. 3 is a heat transfer element for reducing the thickness of a liquid film of a regenerative condensing heat exchanger in accordance with the present invention.
Description of reference numerals:
1-a first corrugated plate; 101-an inverted double-herringbone corrugated flow channel; 102-a first vertical trapezoidal corrugated channel; 103-a first vertical plate; 2-a second corrugated plate; 201-double Chinese character 'pin' shaped corrugated flow channel; 202-a second vertical trapezoidal corrugated channel; 203-second vertical flat plate.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 3, the present invention provides a heat transfer element for reducing the thickness of a liquid film of a regenerative condensation heat exchanger, which comprises a first corrugation plate 1 and a second corrugation plate 2, as shown in fig. 1 and 2. The first corrugated plate 1 is composed of a series of inverted double-herringbone corrugated flow channels 101, the inclination angle of the corrugations is 30-50 degrees, a first vertical trapezoidal corrugated channel 102 with a single wave crest and a single wave trough is additionally arranged at the symmetrical position of the inverted single-herringbone corrugated flow channels, and a first vertical flat plate 103 is additionally arranged at the connecting position of two adjacent inverted double-herringbone corrugated flow channels. The wave height of the first vertical trapezoidal corrugated channel 102 is 10 mm-25 mm, the width of the first vertical flat plate is 5 mm-10 mm, the width of the trapezoidal upper bottom of the first vertical trapezoidal corrugated flat plate 102 is the same as that of the first vertical flat plate, and the width of the trapezoidal lower bottom is 1.1 times-1.5 times of that of the upper bottom. The second corrugated plate 2 is composed of a series of double herringbone corrugated flow channels 201, the corrugated inclination angle is the same as that of the first corrugated plate, a second vertical trapezoidal corrugated channel 202 with a single wave crest and a single wave trough is additionally arranged at the joint of two adjacent herringbone corrugated flow channels, and a second vertical flat plate 203 is additionally arranged at the symmetrical position of the single herringbone corrugated flow channel. The wave height of the second vertical trapezoidal corrugated channel 202 is the same as that of the first vertical trapezoidal corrugated channel 101, the width of the second vertical flat plate is the same as that of the first vertical flat plate, the width of the trapezoidal upper bottom of the second vertical trapezoidal corrugated channel 202 is the same as that of the second vertical flat plate, and the width of the trapezoidal lower bottom is 1.1-1.5 times of that of the upper bottom. And finally, continuously superposing the first corrugated plate 1 and the second corrugated plate 2 in a periodic mode in a sub-bin of the regenerative condensation heat exchanger to form dense condensation heat transfer channels, wherein the plate distance between the first corrugated plate 1 and the second corrugated plate 2 is the wave height of a vertical trapezoidal corrugated channel, as shown in fig. 3.
The invention provides a heat transfer element for reducing the thickness of a liquid film of a regenerative condensation heat exchanger, which is characterized in that a first corrugated plate and a second corrugated plate are superposed during working, and two closed condensation heat transfer channels H1, H2, H1 and H2 with the same cross-sectional area are formed by the first corrugated plate, a first vertical trapezoidal corrugated channel, a first vertical flat plate, the second corrugated plate, a second vertical trapezoidal corrugated channel and the second vertical flat plate, so that the whole condensation heat transfer channel is periodically formed.
When water vapor in wet flue gas is condensed in the H1 heat transfer channel, condensate formed on the first corrugated plate flows in the inverted herringbone flow channel, experiments prove that the condensate basically flows downwards along the wave trough of the corrugated plate on the corrugated plate, the flow pattern is approximately linear, the residence time of the condensate on the corrugated plate is reduced, the condensate is quickly converged on the first vertical trapezoidal corrugated channel additionally arranged at the symmetrical position of the single herringbone flow channel, and the condensate is maximally accelerated on the first vertical trapezoidal corrugated channel under the dual action of gravity and flue gas carrying, so that the liquid discharge rate of the condensate is increased; condensate formed on the second corrugated plate flows in the herringbone flow channel and is quickly gathered on a second vertical trapezoidal corrugated channel at the joint of the herringbone flow channel, under the action of the second vertical trapezoidal corrugated channel and the first vertical flat plate, one part of the condensate is transferred to the first corrugated plate and is quickly discharged from the inverted herringbone flow channel and the first vertical trapezoidal corrugated channel, and the other part of the condensate is quickly discharged along the second vertical trapezoidal corrugated channel under the action of gravity and carried smoke.
When water vapor in the wet flue gas is condensed in the H2 heat transfer channel, condensate formed on the second corrugated plate flows in the herringbone flow channel and is rapidly converged on the second vertical trapezoidal corrugated channel at the joint of the two herringbone flow channels, and the converged condensate further accelerates to flow on the vertical trapezoidal corrugated channel under the dual actions of gravity and flue gas carrying, so that the liquid discharge rate of the condensate is improved; condensate formed on the first corrugated plate flows in the inverted herringbone corrugated flow channel, quickly converges on the first vertical trapezoidal corrugated channel added at the symmetrical position of the single herringbone corrugated flow channel, under the action of the first vertical trapezoidal corrugated channel and the second vertical flat plate, one part of the condensate is transferred to the second corrugated plate and quickly discharged from the herringbone corrugated flow channel and the second vertical trapezoidal corrugated channel, and the other part of the condensate is quickly discharged along the first vertical trapezoidal corrugated channel under the action of gravity and flue gas carrying.
Finally, under the combined action of the first corrugated plate and the second corrugated plate, the liquid discharge speed of the regenerative condensing heat exchanger can be greatly improved, the thickness of a condensate film on the corrugated plate is reduced, and the condensation heat transfer is enhanced.
Claims (10)
1. A heat transfer element for reducing the thickness of a liquid film of a regenerative condensing heat exchanger, characterized by comprising a first corrugated plate (1) and a second corrugated plate (2); wherein,
a series of inverted double-herringbone corrugated flow channels (101) are arranged on the first corrugated plate (1), a first vertical trapezoidal corrugated channel (102) with a single wave crest and a single wave trough is additionally arranged at the symmetrical position of the inverted single-herringbone corrugated flow channel, and a first vertical flat plate (103) is additionally arranged at the connecting position of two adjacent inverted double-herringbone corrugated flow channels;
a series of double-herringbone corrugated flow channels (201) are arranged on the second corrugated plate (2), a second vertical trapezoidal corrugated channel (202) with a single wave crest and a single wave trough is additionally arranged at the symmetrical position of the double-herringbone corrugated flow channels (201), and a second vertical flat plate (203) is additionally arranged at the symmetrical position of the single-herringbone corrugated flow channels forming the double-herringbone corrugated flow channels (201);
the wave heights of the first vertical trapezoidal corrugated channel (102) and the second vertical trapezoidal corrugated channel (202) are the same;
the widths of the trapezoidal upper bottoms of the first vertical trapezoidal corrugated channel (102) and the second vertical trapezoidal corrugated channel (202) are the same as the widths of the first vertical flat plate (103) and the second vertical flat plate (203), and the width of the trapezoidal lower bottom is 1.1-1.5 times of the width of the upper bottom;
the first corrugated plate (1) and the second corrugated plate (2) are periodically overlapped to form a dense condensation heat transfer channel.
2. A heat transfer element for reducing the thickness of a liquid film in a regenerative condensation heat exchanger according to claim 1, characterized in that the inclination of the corrugations of the first corrugated plate (1) is 30 ° to 50 °.
3. A heat transfer element for thinning the liquid film thickness of a regenerative condensation heat exchanger according to claim 1, characterized in that the wave height of the first vertical trapezoidal corrugated channels (102) is 10mm to 25 mm.
4. A heat transfer element for thinning the liquid film thickness of a regenerative condensation heat exchanger according to claim 1, characterized in that the width of the first vertical flat plate (103) is 5mm to 10 mm.
5. A heat transfer element for reducing the thickness of a liquid film in a regenerative condensation heat exchanger according to claim 1, characterized in that the inclination of the corrugations of the second corrugated plate (2) is 30 ° to 50 °.
6. A heat transfer element for thinning the liquid film thickness of a regenerative condensation heat exchanger according to claim 1, characterized in that the wave height of the second vertical trapezoidal corrugated channels (202) is 10mm to 25 mm.
7. A heat transfer element for reducing the thickness of a liquid film in a regenerative condensation heat exchanger according to claim 1, characterized in that the width of the second vertical flat plate (203) is 5mm to 10 mm.
8. A heat transfer element for reducing the thickness of a liquid film in a regenerative condensation heat exchanger according to claim 1, characterized in that the plate separation distance of the first corrugated plate (1) and the second corrugated plate (2) is the vertical trapezoidal corrugated channel wave height.
9. A heat transfer element for reducing the liquid film thickness of a regenerative condensation heat exchanger according to claim 1, characterized in that the widths of the trapezoidal upper bases of the first vertical trapezoidal corrugated channel (102) and the second vertical trapezoidal corrugated channel (202) are the same as the widths of the first vertical flat plate (103) and the second vertical flat plate (203), and the widths of the trapezoidal lower bases are 1.1 to 1.5 times the widths of the upper bases.
10. A heat transfer element for reducing the thickness of a liquid film of a regenerative condensation heat exchanger according to claim 1, characterized in that, in operation, the first corrugated plate (1) and the second corrugated plate (2) are stacked, and two closed condensation heat transfer channels H1 and H2 with the same cross-sectional area are formed by the first corrugated plate (1), the first vertical trapezoidal corrugated channel (102), the first vertical flat plate (103), the second corrugated plate (2), the second vertical trapezoidal corrugated channel (202) and the second vertical flat plate (203), wherein the H1 and the H2 form an integral condensation heat transfer channel periodically;
when water vapor in wet flue gas is condensed in the H1 heat transfer channel, condensate formed on the first corrugated plate (1) flows in the inverted herringbone flow channel and is rapidly converged on the first vertical trapezoidal corrugated channel (102) additionally arranged at the single-person-shaped symmetrical position along the inverted herringbone flow channel, and under the dual action of gravity and flue gas carrying, the condensate is maximally accelerated on the first vertical trapezoidal corrugated channel (102), so that the liquid discharge rate of the condensate is increased; condensate formed on the second corrugated plate (2) flows in the herringbone flow channel and is quickly gathered on the second vertical trapezoidal corrugated channel (202) at the connection position of the two herringbone flow channels, under the action of the second vertical trapezoidal corrugated channel (202) and the first vertical flat plate (103), one part of the condensate is transferred to the first corrugated plate (1) and is quickly discharged by the herringbone flow channel and the first vertical trapezoidal corrugated channel (102), and the other part of the condensate is quickly discharged along the second vertical trapezoidal corrugated channel (202) under the action of gravity and flue gas carrying;
when water vapor in wet flue gas is condensed in the H2 heat transfer channel, condensate formed on the second corrugated plate (2) flows in the herringbone flow channel and is rapidly converged on the second vertical trapezoidal corrugated channel (202) at the connection position of the two herringbone flow channels, and the converged condensate further accelerates to flow on the vertical trapezoidal corrugated channel under the dual actions of gravity and flue gas carrying, so that the liquid discharge rate of the condensate is improved; condensate formed on the first corrugated plate (1) flows in the inverted herringbone flow channel and is rapidly converged on the first vertical trapezoidal corrugated channel (102) additionally arranged at the single-person-shaped symmetrical position, under the action of the first vertical trapezoidal corrugated channel (102) and the second vertical flat plate (203), one part of the condensate is transferred to the second corrugated plate (2) and is rapidly discharged through the herringbone corrugated channel and the second vertical trapezoidal corrugated channel (202), and the other part of the condensate is rapidly discharged along the first vertical trapezoidal corrugated channel (102) under the action of gravity and flue gas carrying;
finally, under the combined action of the first corrugated plate (1) and the second corrugated plate (2), the liquid discharge speed of the regenerative condensing heat exchanger can be greatly improved, and the condensing heat transfer is enhanced.
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| US5709264A (en) * | 1996-03-18 | 1998-01-20 | The Boc Group, Inc. | Heat exchanger |
| US6299845B1 (en) * | 1997-08-08 | 2001-10-09 | Uop Llc | Catalytic distillation with in situ catalyst replacement |
| JPH11248387A (en) * | 1998-02-27 | 1999-09-14 | Konica Corp | Heat exchanger and heat exchanging method |
| SI23711B (en) * | 2011-04-05 | 2020-12-31 | Elaphe Pogonske Tehnologije D.O.O. | compact multiphase wave winding electric machine with a high specific torque |
| CN104501640A (en) * | 2014-11-26 | 2015-04-08 | 常州互联天健信息科技有限公司 | Horizontal straight corrugated plate |
| CN106500410A (en) * | 2016-10-25 | 2017-03-15 | 珠海格力电器股份有限公司 | Air conditioning unit, shell-and-tube heat exchanger and heat exchange method of shell-and-tube heat exchanger |
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