CN203479128U - Plate-fin plate combination for air preheaters - Google Patents
Plate-fin plate combination for air preheaters Download PDFInfo
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- CN203479128U CN203479128U CN201320546686.5U CN201320546686U CN203479128U CN 203479128 U CN203479128 U CN 203479128U CN 201320546686 U CN201320546686 U CN 201320546686U CN 203479128 U CN203479128 U CN 203479128U
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- fin
- plate
- air
- bundle
- flow channel
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
A plate-fin plate combination for air preheaters comprises heat transfer plates, fins, seal strips, and guide sheets. The fins are disposed between the two adjacent heat transfer plates. The guide sheets are disposed at two ends of each fin. The edges, except for the edge of a smoke or air access hole, are sealed with the seal strips, so that passages are formed; the passages are isolated and stacked according to a smoke channel and an air channel and are brazed in a whole, so that the plate-fin plate combination for air preheaters is formed. The plate-fin plate combination for air preheaters is widely applicable to smoke waste heat recovery air preheaters for heating furnaces or industrial kilns in the oil refining and chemical industry fields, and is high in heat transfer efficiency, good in airtightness, resistant to dust accumulation, compact in structure and widely applicable.
Description
Technical field
The utility model belongs to field of heat exchangers.Be particularly related to a kind of plate-fin plate bundle that can be applicable to the flue gas waste heat recovery air preheater of oil refining, chemical field heating furnace or industry kiln.
Background technology
The air preheater pattern of applying in domestic and international project at present mainly contains shell and tube air preheater, heat pipe preheater, rotary regenerative air preheater, plate air preheater.
Shell and tube air preheater is simple in structure, equipment good airproof performance.Shortcoming is: light pipe type preheater heat exchange property is poor, bulky; Enhanced tube pipe internal resistance is large, to air blast blast, requires high; The outer easily dust stratification of finned tube pipe, difficult deashing.
Heat pipe preheater has the advantages such as the thermal efficiency is high, volume is little, lightweight, cost is lower, dew-point corrosion resistant ability is good.But in heat pipe preheater use procedure, heating agent loss, air inlet etc. can cause hot pipe vacuum degree to decline and lose efficacy; Air preheater operating temperature is limited by heating agent serviceability temperature, and surpassing 380 ℃ needs to adopt more expensive heating agent and the high-temperature material heat pipe of price, to prevent booster; Use after 2 ~ 3 years, heat pipe need to singlely vacuumize or change again, and maintenance cost is large, and the time between overhauls(TBO) is long.
Rotary regenerative air preheater, as the visual plant of power plant's large scale computer assembly cover, is the principal mode that the large capacity unit of power industry adopts air preheater.Rotary regenerative air preheater heat transfer efficiency is high, compact conformation, and unit are material consumption is few, the loss large (10～30%) but equipment leaks out, low-temperature dew point corrosion outstanding problem, needs motor driving thereby long-term operation cost high, in a lot of industries such as iron and steel, does not substantially select.
Plate air preheater has the advantages such as heat transfer efficiency is high, compact conformation, material range of choice is wide, service life of equipment is long, applies in recent years in petrochemical industry large-scale popularization.Between plate air preheater plate, by ripple, support, between plate, without connecting, the folded thick direction of plate need arrange pressure strip pressure strip bundle, has increased plate Shu Chongliang; Corrugated cardboard sheet adopts all-welded structure, and welding job amount is large, and the air preheater manufacturing cycle is long.
Utility model content
The utility model, inheriting that plate air preheater heat transfer efficiency is high, on the basis of wide, the long advantage of service life of equipment of good seal performance, material range of choice, has proposed the plate-fin plate bundle for air preheater that a kind of manufacturing process is simple, structure is compacter, be difficult for dust stratification.
The technical solution of the utility model is: plate-fin plate bundle for a kind of air preheater, comprise heat transferring plate, fin, strip of paper used for sealing, flow deflector, between two adjacent described heat transferring plates, fin is set, the two ends of this fin arrange flow deflector, except flue gas or air ports limit, all the other each limits form passage with strip of paper used for sealing sealing, a plurality of these passages are piled up and put separately by flue gas flow channel, air flow channel, and soldering becomes integral body to obtain plate-fin plate bundle for described air preheater.
Positive role of the present utility model is:
1, the utility model is usingd heat transferring plate and fin as heat transfer element, and fluid course equivalent diameter is little, and the continuous variation of flow area makes fluid form strong turbulent flow, and the continuous destroyed heat in boundary layer, effectively reduces thermal resistance, improves plate bundle heat transfer efficiency.
2, the utility model flue gas, air are pure counter-current flow in heat transferring plate both sides, and the effective heat transfer temperature difference of cold fluid and hot fluid is large, and being specially adapted to flue gas, air has temperature to intersect occasion.
3, fin increases the heat transfer area that plate-fin air preheater plate bundle unit volume is held, and compactness can reach 500m
2/ m
3, save air preheater arrangement space.
4, plate-fin plate bundle can regulate by the height of fin flue gas flow channel, air flow channel cross-sectional area, adapts to harsher flue gas, air drag and falls requirement, and both sides flow resistance performance coupling flexibly.
5, the existence of fin structure, has improved fluid turbulent degree, strengthens its self-cleaning effect; Heat transferring plate, fin, flow deflector, strip of paper used for sealing material are stainless steel or nickel-base alloy etc., and fluid contact element surface is smooth; Hexagonal end trigonum arranges flow deflector, and convection cell distributes and plays guide effect, even fluid distribution; Above-mentioned three reasons make plate wing plate Shu Buyi dust stratification.
6, plate-fin plate bundle fin and heat transferring plate brazing for air preheater, fin has support, connection function to heat transferring plate simultaneously, greatly increased plate bundle integral rigidity and intensity, without arranging between plate, supported and for compressing the pressure strip of plate, plate bundle is lightweight.
7, the whole furnace brazing of plate-fin plate Shu Caiyong for air preheater, welding efficiency is high, has shortened the plate bundle manufacturing cycle, has reduced plate bundle manufacturing cost, is particularly suitable for extensive suitability for industrialized production in batches.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model flue gas single channel figure;
Fig. 3 is the utility model air single channel figure;
Fig. 4 is the A-A sectional view in Fig. 2;
Fig. 5 is the B-B sectional view in Fig. 3;
Wherein: 1 heat transferring plate, 2 fins, 3 strip of paper used for sealings, 4 flow deflectors, 101 flue gases flow into, and 102 flue gases flow out, and 201 air flow into, and 202 air flow out.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described further.
As shown in Figure 1 and 2, a kind of air preheater comprises heat transferring plate 1, fin 2, strip of paper used for sealing 3, flow deflector 4 with plate-fin plate bundle, wherein usings heat transferring plate 1 and fin 2 as heat transfer element.Fig. 1 is the utility model plate-fin plate bundle stereogram, and Fig. 2 is the utility model structural representation.Between two adjacent described heat transferring plates 1, fin 2 is set, the two ends of this fin 2 arrange flow deflector 4, except flue gas or air ports limit, all the other each limits form passage with strip of paper used for sealing 3 sealings, a plurality of passages are piled up and put separately by flue gas flow channel (101 → 102), air flow channel (201 → 202), and soldering becomes integral body to obtain plate-fin plate bundle for described air preheater.
The material of described heat transferring plate 1, fin 2, strip of paper used for sealing 3, flow deflector 4 is stainless steel or nickel-base alloy.Make the smooth plate wing plate Shu Buyi dust stratification that causes of fluid contact element surface.
Described heat transferring plate 1 is flat board, bubbling plate or corrugated plating etc., and the geometry of heat transferring plate 1 is hexagon, between smoke entrance length of side a and air ports side length b, meets a ≠ b or a=b.Hexagon template can be realized the pure countercurrent flow between flue gas and air; Smoke entrance length of side a and air ports side length b, be exactly the import and export size of flue gas and air, can adjust by the import and export length of side of adjusting flue gas and air the import and export flow velocity of flue gas and air, thereby adjust plate bundle inner fluid pressure drop and distribution.
The structure of described fin 2 is plain fin, perforated fin, saw tooth fin, corrugated fin, pin-fin or venetian blind type fin.The structure of described fin 2 that is placed in flue gas flow channel and air flow channel is identical or not identical.The effect of fin between flue gas and air flow channel, the one, support plate, make adjacent two plates form fluid course, the 2nd, flow-disturbing, changes direction of flow and flow velocity, thus the heat-transfer effect of enhance fluid.The utility model can arrange identical or different fin structure according to the fluid behaviour of flue gas and air, best thereby the fluid resistance of making and heat transfer property reach in air preheater.
In hexagon heat transferring plate 1 trigonum, flow deflector 4 is set, before fluid enters convection heat transfer' heat-transfer by convection district, guide effect is played in the distribution of flow deflector 4 convection cells.Except region, passage trigonum import and export, equal brazing sealing strip 3 sealings in all the other each limits, strip of paper used for sealing 3, for separating cold and hot fluid runner, makes it to form enclosure space each other.
Described air preheater is shown in Fig. 3 with plate-fin plate bundle exhaust gases passes, and air duct is shown in Fig. 4.The upper and lower trigonum of hexagon heat transferring plate arranges flow deflector 4, intermediate rectangular district distribution fin.For exhaust gases passes, except smoke entrance place, region, trigonum, the equal brazing sealing strip 3 in all the other each limits seals; For air duct, except trigonum regional air import and export, the equal brazing sealing strip 3 in all the other each limits seals.Flue gas single channel A-A is shown in Fig. 4 in cross section, and air single channel B-B is shown in Fig. 5 in cross section, according to fluid volume flow and pressure drop requirement, adjusts the height H of flue gas flow channel and height h, H ≠ h or the H=h of air flow channel.Flue gas enters from 101, and 102 flow out ， intermediate rectangular districts flows from top to bottom; Air enters from 201, and 202 flow out ， intermediate rectangular districts flows from bottom to top, and flue gas, air are pure adverse current in heat transferring plate both sides.
Claims (7)
1. plate-fin plate bundle for an air preheater, comprise heat transferring plate, fin, strip of paper used for sealing, flow deflector, it is characterized in that: between two adjacent described heat transferring plates (1), fin (2) is set, the two ends of this fin (2) arrange flow deflector (4), except flue gas or air ports limit all the other each for limit strip of paper used for sealing (3) sealing form passage, a plurality of these passages are piled up and put separately by flue gas flow channel, air flow channel, and soldering becomes integral body to obtain plate-fin plate bundle for described air preheater.
2. plate-fin plate bundle as claimed in claim 1, is characterized in that: the material of described heat transferring plate (1), fin (2), flow deflector (4), strip of paper used for sealing (3) is stainless steel or nickel-base alloy.
3. plate-fin plate bundle as claimed in claim 1 or 2, is characterized in that: described heat transferring plate (1) is flat board, bubbling plate or corrugated plating.
4. plate-fin plate bundle as claimed in claim 3, is characterized in that: the geometry of described heat transferring plate (1) is hexagon, between smoke entrance length of side a and air ports side length b, meets a ≠ b or a=b.
5. plate-fin plate bundle as claimed in claim 1 or 2, is characterized in that: the structure of described fin (2) is plain fin, perforated fin, saw tooth fin, corrugated fin, pin-fin or venetian blind type fin.
6. plate-fin plate bundle as claimed in claim 5, is characterized in that: the structure of described fin (2) that is placed in flue gas flow channel and air flow channel is identical or not identical.
7. plate-fin plate bundle as claimed in claim 1, is characterized in that: the height of described flue gas flow channel equates with the height of air flow channel or be unequal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320546686.5U CN203479128U (en) | 2013-09-04 | 2013-09-04 | Plate-fin plate combination for air preheaters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320546686.5U CN203479128U (en) | 2013-09-04 | 2013-09-04 | Plate-fin plate combination for air preheaters |
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| Publication Number | Publication Date |
|---|---|
| CN203479128U true CN203479128U (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320546686.5U Expired - Fee Related CN203479128U (en) | 2013-09-04 | 2013-09-04 | Plate-fin plate combination for air preheaters |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108317876A (en) * | 2018-04-17 | 2018-07-24 | 哈尔滨理工大学 | A kind of reverse flow plate-fin heat exchanger plate beam |
| CN109341399A (en) * | 2018-11-01 | 2019-02-15 | 中国科学院上海高等研究院 | Heat exchange unit, regenerative apparatus and heat-exchange system |
| CN112696940A (en) * | 2020-12-29 | 2021-04-23 | 河海大学 | Multichannel heat exchanger of large-scale air water making unit |
-
2013
- 2013-09-04 CN CN201320546686.5U patent/CN203479128U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108317876A (en) * | 2018-04-17 | 2018-07-24 | 哈尔滨理工大学 | A kind of reverse flow plate-fin heat exchanger plate beam |
| CN109341399A (en) * | 2018-11-01 | 2019-02-15 | 中国科学院上海高等研究院 | Heat exchange unit, regenerative apparatus and heat-exchange system |
| CN112696940A (en) * | 2020-12-29 | 2021-04-23 | 河海大学 | Multichannel heat exchanger of large-scale air water making unit |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20180904 |
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| CF01 | Termination of patent right due to non-payment of annual fee |