CN114234685B - Flue gas heat exchanger with efficient heat exchange fins and backflow turbulence function - Google Patents
Flue gas heat exchanger with efficient heat exchange fins and backflow turbulence function Download PDFInfo
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- CN114234685B CN114234685B CN202111578769.8A CN202111578769A CN114234685B CN 114234685 B CN114234685 B CN 114234685B CN 202111578769 A CN202111578769 A CN 202111578769A CN 114234685 B CN114234685 B CN 114234685B
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- heat exchange
- flue gas
- rectangular channel
- fin
- heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
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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
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
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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
- F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
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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
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
- F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
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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
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/24—Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G1/00—Non-rotary, e.g. reciprocated, appliances
- F28G1/16—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris
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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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a flue gas heat exchanger with a backflow turbulence function by using efficient heat exchange fins, which specifically comprises double-sided rectangular channel plates, efficient heat exchange fins and a seal head structure, wherein the double-sided rectangular channel plates are welded into plate pairs, the efficient fins are arranged and fixed in the plate pairs at certain intervals, and a semi-closed heat exchange cavity is formed between the plate pairs by the seal head structure. The efficient fins are heat-conducting metal aluminum plates which are bent to be of a specified S-shaped structure. The novel heat exchange fin can enable part of high-temperature flue gas and low-temperature flue gas in the heat exchanger to be mixed with each other, damage the flowing boundary layer of the flue gas in the rectangular channel, and enable the flue gas to generate vortex flow between adjacent fins. The heat exchange efficiency of the flue gas side is improved to a large extent, so that the heat exchange effect of the heat exchanger is enhanced.
Description
Technical Field
The invention relates to the field of heat exchangers, in particular to a flue gas heat exchanger with a backflow turbulence function by adopting efficient heat exchange fins.
Background
The main purpose of the heat exchanger is to realize heat exchange of cold and hot fluid, and the heat exchanger is widely applied to various occasions. The high efficiency and the compactness are important performance indexes of heat exchange equipment, and are important attention objects of designers and researchers in recent decades, so that the design of a heat exchanger with high heat efficiency has extremely strong practical significance. At present, most heat exchangers perform waste heat recovery on medium-high temperature flue gas, and after heat is recovered and utilized by the high-temperature flue gas through the heat exchangers, low-temperature flue gas still has higher temperature, and the energy in the low-temperature flue gas is further subjected to waste heat recovery, so that the recovery heat efficiency of the heat exchangers can be increased.
Plate-fin heat exchangers in heat exchangers are widely used in heat exchange processes between gases. At present, most plate-fin heat exchangers are processed in a vacuum brazing mode, wherein a flow channel is formed by a baffle plate, fins and seals, and the flow channel is subjected to superposition brazing to form a plate bundle. Under high-temperature working conditions, stress strain can be caused by uneven temperature field distribution of the plate-fin structure, expansion ratios of the structures in the heat exchanger are not matched, so that the degree of freedom of the plate-fin structure is limited, excessive local thermal stress is usually generated at the welded joints of the partition plates and the fins, the thermal stress can cause the structure of the heat exchanger to be damaged, and the service life of the heat exchanger is further shortened.
When the fluid flows through the wall surface, the fluid flow boundary layer is destroyed, and vortex disturbance is formed on the fluid, so that the fluid flow is two heat exchange enhancement modes which are widely applied at present.
Disclosure of Invention
The present invention has been made in view of the above problems. One of the purposes of the invention is to provide a high-efficiency heat exchange fin to destroy a smoke flow boundary layer in a rectangular channel, so that smoke generates vortex in channels among the fins, and further the heat efficiency of smoke recovery is improved;
one of the purposes of the present invention is to provide a novel double-sided rectangular channel plate structure to improve the heat exchange efficiency and strength of the heat exchanger.
One of the purposes of the present invention is to provide a flue gas heat exchanger with backflow turbulence function, so that part of high temperature flue gas and low temperature flue gas are mixed, thereby increasing the flow speed of main stream flue gas in the heat exchanger, and further enhancing the overall heat efficiency of the heat exchanger. In addition, the problem of overlarge local thermal stress at the fin and the partition plate in the conventional plate-fin heat exchanger is solved;
the flue gas heat exchanger with the backflow turbulence function comprises efficient heat exchange fins, double-sided rectangular channel plates and a seal head structure, wherein the tail parts of the double-sided rectangular channel plates are sealed by the seal head structure to form a semi-closed heat exchange cavity, a U-shaped flow path is formed in the flue gas, and the double-sided rectangular channel plates are assembled in pairs;
the height between the high-efficiency heat exchange fin and the rectangular plate channel is set to be 1/5-1/4 of the mass flow of the main stream smoke occupied by the mass flow of the reflux low-temperature smoke;
the two ends of the efficient heat exchange fin are perpendicular to the double-sided rectangular channel plates, the efficient heat exchange fin is arranged between the upper plate and the lower plate at intervals, rectangular ventilation flow channels I are arranged on the efficient heat exchange fin at intervals, and the structural size of the rectangular ventilation flow channels I is matched with the size of rectangular flow channels on the lower plate; the ventilation flow channels I on the high-efficiency heat exchange fins of two adjacent rows are staggered with each other;
the high-efficiency heat exchange fins are heat conduction aluminum plates which are bent to be of S-shaped structures, and sharp corners are manufactured at two ends of each fin; the connecting line of the two turning points of the efficient heat exchange fin forms an included angle of 20-30 degrees with the vertical direction; the high-efficiency heat exchange fin is provided with a flow guide panel which is inclined obliquely downwards and forms an included angle of 45 degrees with the horizontal direction; the end direction of the efficient heat exchange fin is consistent with the airflow direction in the ventilation flow channel III; a ventilation flow passage II is arranged between two adjacent rows of the high-efficiency heat exchange fins and is used for mixing part of high-temperature flue gas and low-temperature flue gas;
the double-sided rectangular channel plate is of a rectangular channel structure with two asymmetric sides, and rectangular groove channels on the double-sided rectangular channel plate are arranged oppositely at intervals, so that local thermal stress in the channels can be reduced, and structural damage is caused.
The rectangular groove channels on the double-sided rectangular channel plate are of two different heights and are arranged in a concave-convex shape, the higher rectangular channels play a supporting role so as to enhance the structural strength of the heat exchanger, and the lower rectangular channels play a shunting role so as to reduce the pressure drop in the heat exchanger and enhance the heat exchange efficiency.
The double-sided rectangular channel plate is made of aluminum.
When the high-temperature flue gas flows through the upper channel, heat exchange is carried out between the high-temperature flue gas and the cooling medium above until the sealing head structure is changed into low-temperature flue gas, the flowing direction is changed, and the low-temperature flue gas passes through the lower channel and exchanges heat with the cooling medium in the lower channel again. Therefore, the waste heat in the low-temperature flue gas can be better recovered, so that the overall heat efficiency of the heat exchanger is improved.
When the high-temperature flue gas flows through the upper channel, the sharp upper ends of the high-efficiency heat exchange fins destroy the boundary layer of the continuously flowing high-temperature flue gas, so that the heat transfer process of the high-temperature flue gas and the cooling medium above is enhanced; when low-temperature flue gas flows through the lower channel, the sharp lower ends of the high-efficiency heat exchange fins destroy the continuous flowing low-temperature flue gas boundary layer, and the heat transfer process of the low-temperature flue gas and a cooling medium below is enhanced, so that the heat exchange efficiency of the heat exchanger is enhanced.
Because the designed high-efficiency heat exchange fin has a special S-shaped streamline structure, when low-temperature flue gas flows through the channel below, part of low-temperature flue gas enters the channel, so that high-temperature flue gas and part of low-temperature flue gas are mixed, the temperature of the high-temperature flue gas is reduced, the heat load of the high-efficiency heat exchange fin structure is reduced, the temperature distribution of the flue gas at the high-efficiency heat exchange fin structure is more uniform, and the thermal stress and thermal strain in the plate-fin heat exchanger structure are reduced.
The sharp end structures of the high-efficiency heat exchange fins enable the flue gas to generate a large amount of turbulence, the air inlet flow can enter the two adjacent high-efficiency heat exchange fin channels to collide with the fin structures, a scouring effect is formed on the fin structures, and tiny dust adhered on the fin structures is cleaned, so that the adsorption and deposition of dust are reduced.
The special S streamline structure of the efficient heat exchange fin enables low-temperature flue gas and high-temperature flue gas entering the efficient heat exchange fin to form vortex flow, and therefore the purpose of heat transfer enhancement is achieved.
The high-efficiency heat exchange fin is provided with the first ventilation flow channel so as to avoid excessive dead angles and included angles in the whole plate-fin heat exchanger, and reduce adsorption and deposition of smoke dust in smoke on the heat exchange wall surface, thereby prolonging the service life of the heat exchanger and enhancing the heat exchange efficiency of the heat exchanger.
Drawings
FIG. 1 is a schematic view of a high efficiency heat exchange fin of the present invention;
FIG. 2 is a cross-sectional view of a high efficiency heat exchange fin of the present invention along a ventilation flow path;
FIG. 3 is a schematic view of a double-sided rectangular channel plate structure of the present invention;
fig. 4 is a schematic diagram of the flue gas heat exchanger according to the invention.
Description of the embodiments
The present invention will be further described in conjunction with the following specific embodiments and the accompanying drawings, in which more details are set forth in order to provide a thorough understanding of the present invention, but it will be apparent that the present invention can be practiced in many different ways than described herein, and that those skilled in the art may make similar generalizations and deductions depending on the actual circumstances without departing from the spirit of the present invention, and therefore, the scope of the present invention should not be limited in this context by this specific embodiment.
In the drawings, components having the same structure are denoted by the same reference numerals, and structures having different functions among the components are denoted by the similar reference numerals. The structural dimensions and thicknesses given in the figures are arbitrarily represented, and the present invention is not limited to the specific dimensions and thicknesses of each component. In the present patent specification, the thicknesses and dimensions of the components of the drawings are appropriately exaggerated for a clearer explanation of the structural principles.
As shown in fig. 1, the efficient heat exchange fin 1 of the flue gas heat exchanger with the backflow turbulence function is an efficient heat exchange fin, the efficient heat exchange fin is a heat conduction aluminum plate which is bent to form an S-shaped structure 13, and sharp corners 12 are manufactured at two ends of the fin;
furthermore, the two ends of the high-efficiency heat exchange fin 1 are vertical to the double-sided rectangular channel plate 2,
furthermore, the connecting line of the two turning points of the efficient heat exchange fin 1 forms an included angle of 20-30 degrees with the vertical direction, and is fixed between the upper rectangular channel plate and the lower rectangular channel plate;
further, the efficient heat exchange fin 1 is provided with ventilation channels I14 which are arranged at certain intervals;
further, the first ventilation flow passage arranged on the efficient heat exchange fin 1 has a structural size matched with the rectangular passage size of the lower plate, as shown by reference numeral 44;
further, ventilation flow channels I on the adjacent two rows of high-efficiency heat exchange fins 1 are staggered;
further, the high-efficiency heat exchange fin 1 is provided with a flow guiding panel 15 inclined obliquely downwards, and the flow guiding panel forms an included angle of 45 degrees with the horizontal direction, as shown in fig. 2;
as shown in fig. 3, in order to achieve the above object, the double-sided rectangular channel plate 2 has an asymmetric rectangular channel structure on both sides.
Furthermore, the double-sided rectangular groove channels on the double-sided rectangular channel plate 2 are oppositely arranged at certain intervals, so that the problem that the heat exchanger structure is damaged due to overlarge local thermal stress in the rectangular groove channels can be avoided.
Further, the rectangular channels on the double-sided rectangular channel plate 2 have two different heights, are arranged in a concave-convex shape, and the higher rectangular channel 22 plays a supporting role to enhance the structural strength of the heat exchanger, and the lower rectangular channel 23 plays a shunting role to reduce the pressure drop in the heat exchanger and enhance the heat exchange efficiency.
As shown in fig. 4, the flue gas heat exchanger with the backflow turbulence function adopting the efficient heat exchange fins comprises the efficient heat exchange fins 1, double-sided rectangular channel plates 2 and an end socket structure 3, wherein the double-sided rectangular channel plates 2 are brazed to form plate pairs, the efficient heat exchange fins 2 are aluminum plates with certain thickness, which are bent to form an S-shaped structure, the efficient heat exchange fins are arranged at certain intervals and fixed between an upper plate structure and a lower plate structure at an angle, the end parts of the fins are perpendicular to horizontal rectangular flow channels in the plates, and the double-sided rectangular channel plates 2 are welded and sealed by the end socket structure 3, so that a semi-closed heat exchange cavity is formed.
Further, in the flue gas heat exchanger with the backflow turbulence function adopting the efficient heat exchange fins, the end directions of the efficient heat exchange fins (1) are consistent with the airflow directions in the third ventilation flow passage 42.
Further, the flue gas heat exchanger with the backflow turbulence function adopts the efficient heat exchange fins, and the upper ends of the efficient heat exchange fins are in contact with the rectangular low-pass plates, as shown by reference numeral 41 in fig. 4.
Further, the flue gas heat exchanger with the backflow turbulence function adopts the efficient heat exchange fins, and the lower end parts of the efficient heat exchange fins are matched with the rectangular low-pass of the plate, as shown by the reference numeral 42 in 4.
Further, the flue gas heat exchanger with the backflow turbulence function adopting the efficient heat exchange fins exchanges heat with the cooling medium above the upper rectangular channel plate when high-temperature flue gas flows through the upper channel until the sealing head structure 3 is changed into low-temperature flue gas, the flowing direction is changed, and the low-temperature flue gas passes through the lower channel and exchanges heat with the cooling medium below the lower rectangular channel plate again. The structure can better recycle the waste heat in the low-temperature flue gas so as to improve the heat efficiency of the heat exchanger.
Further, in the flue gas heat exchanger with the backflow turbulence function adopting the efficient heat exchange fins, when high-temperature flue gas flows through the upper channel, the sharp corners of the efficient heat exchange fins are arranged at the upper ends 12 of the sharp corners to disturb the continuously flowing high-temperature flue gas, so that the flowing boundary layer of the high-temperature flue gas is damaged, and the heat transfer process between the high-temperature flue gas and the cooling medium above is enhanced; when low-temperature flue gas flows through the lower channel, the sharp corners of the high-efficiency heat exchange fins are used for disturbing the continuously flowing low-temperature flue gas, so that the flowing boundary layer of the low-temperature flue gas is damaged, the heat transfer process between the low-temperature flue gas and a cooling medium below is enhanced, and the heat exchange efficiency of the heat exchanger is enhanced.
Further, in the flue gas heat exchanger with the backflow turbulence function adopting the high-efficiency heat exchange fins, the ventilation flow channel II 43 with a certain width is arranged between two adjacent rows of high-efficiency heat exchange fins 1, and because the designed high-efficiency heat exchange fins are provided with the special S-shaped streamline structures 13, when low-temperature flue gas flows through the lower channels, part of the low-temperature flue gas enters the ventilation flow channel II 43, so that the high-temperature flue gas and part of the low-temperature flue gas are mixed in the ventilation flow channel II, the temperature of the high-temperature flue gas is reduced, the heat load at the high-efficiency heat exchange fin structure 1 is reduced, the flue gas temperature distribution in each rectangular flow channel is more uniform, and the stress strain in the plate-fin heat exchanger structure is reduced.
Furthermore, in the flue gas heat exchanger with the backflow turbulence function adopting the efficient heat exchange fins, the sharp end structures 12 of the efficient heat exchange fins enable flue gas to generate a large amount of turbulence, the inlet air flow can enter the two adjacent efficient heat exchange fin channels II 43 to collide with the fin structures, a scouring effect is formed on the fin structures, tiny dust adhered to the fin structures is cleaned, and therefore dust adsorption and dust deposition are reduced.
Furthermore, the flue gas heat exchanger with the backflow turbulence function adopts the efficient heat exchange fins, and the specific streamline structure 13 of the efficient heat exchange fins 1 enables low-temperature flue gas and high-temperature flue gas entering the efficient heat exchange fins to form vortex turbulence, so that the purpose of heat transfer enhancement is achieved.
Further, the plate-fin heat exchanger with the novel structure is characterized in that the first ventilation flow channel 14 is arranged on the high-efficiency heat exchange fin, so that excessive dead angles and included angles are avoided in the whole plate-fin heat exchanger, adsorption and deposition of smoke dust in smoke on the heat exchange wall surface are reduced, the service life of the heat exchanger is prolonged, and the heat exchange efficiency of the heat exchanger is improved.
Claims (1)
1. The utility model provides an adopt high-efficient heat transfer fin's flue gas heat exchanger that has backward flow vortex function which characterized in that: the heat exchange device comprises a high-efficiency heat exchange fin (1), double-sided rectangular channel plates (2) and a seal head structure (3), wherein the tail parts of the double-sided rectangular channel plates (2) are sealed by the seal head structure to form a semi-closed heat exchange cavity, a U-shaped flow path is formed in smoke, and the double-sided rectangular channel plates (2) are assembled in pairs;
the high-efficiency heat exchange fin (1) and the rectangular plate channel are arranged at a height which is 1/5-1/4 of the mass flow of the main stream smoke occupied by the mass flow of the reflux low-temperature smoke;
the two ends of the efficient heat exchange fin (1) are perpendicular to the double-sided rectangular channel plates (2), the efficient heat exchange fin (1) is arranged between the upper plate and the lower plate at intervals, the efficient heat exchange fin (1) is provided with rectangular ventilation flow channels I (14) which are arranged at intervals, and the structural size of the efficient heat exchange fin is matched with the size of rectangular flow channels (44) on the lower plate; the ventilation flow channels I (14) on the adjacent two rows of high-efficiency heat exchange fins (1) are staggered;
the high-efficiency heat exchange fins (1) are heat conduction aluminum plates which are bent to form S-shaped structures 13, and sharp corners (12) are formed at two ends of each fin; the connecting line of the two turning points of the efficient heat exchange fin (1) forms an included angle of 20-30 degrees with the vertical direction; the high-efficiency heat exchange fin (1) is provided with a guide panel (15) which is inclined obliquely downwards and forms an included angle of 45 degrees with the horizontal direction; the end direction of the high-efficiency heat exchange fin (1) is consistent with the airflow direction in the ventilation flow channel III (42); a ventilation flow passage II (43) is arranged between two adjacent rows of the high-efficiency heat exchange fins (1) and is used for mixing part of high-temperature flue gas and low-temperature flue gas;
the double-sided rectangular channel plate (2) is of a rectangular channel structure with two sides being asymmetric, rectangular groove channels on the double-sided rectangular channel plate (2) are oppositely arranged at intervals, the rectangular groove channels on the double-sided rectangular channel plate (2) are of two different heights and are arranged in a concave-convex shape, a higher rectangular channel (22) plays a supporting role to enhance the structural strength of the heat exchanger, a lower rectangular channel (23) plays a shunting role to reduce the medium pressure drop of the heat exchanger and enhance the heat exchange efficiency.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111578769.8A CN114234685B (en) | 2021-12-22 | 2021-12-22 | Flue gas heat exchanger with efficient heat exchange fins and backflow turbulence function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111578769.8A CN114234685B (en) | 2021-12-22 | 2021-12-22 | Flue gas heat exchanger with efficient heat exchange fins and backflow turbulence function |
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| CN114234685A CN114234685A (en) | 2022-03-25 |
| CN114234685B true CN114234685B (en) | 2023-06-02 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201593803U (en) * | 2009-09-04 | 2010-09-29 | 中国石油化工集团公司 | High-efficiency air preheater resistant to flue gas low-temperature corrosion |
| CN111426228A (en) * | 2020-05-18 | 2020-07-17 | 安徽东能换热装备有限公司 | Grid type turbulence device of plate type converter |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2073104U (en) * | 1990-06-07 | 1991-03-13 | 宜兴市钮家耐火电瓷厂 | Heat exchanger |
| JP2006125767A (en) * | 2004-10-29 | 2006-05-18 | Tokyo Institute Of Technology | Heat exchanger |
| JP4916857B2 (en) * | 2006-12-07 | 2012-04-18 | 株式会社ティラド | Pressure resistant heat exchanger |
| CN103727555B (en) * | 2013-07-23 | 2016-07-06 | 茂名重力石化机械制造有限公司 | A kind of ripple tooth wing cast sheet regenerative air heater |
| CN112097552A (en) * | 2020-08-18 | 2020-12-18 | 中国原子能科学研究院 | Combined compact heat exchanger core |
| CN115307464A (en) * | 2022-08-01 | 2022-11-08 | 西安热工研究院有限公司 | A printed plate heat exchanger core and heat exchanger |
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2021
- 2021-12-22 CN CN202111578769.8A patent/CN114234685B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201593803U (en) * | 2009-09-04 | 2010-09-29 | 中国石油化工集团公司 | High-efficiency air preheater resistant to flue gas low-temperature corrosion |
| CN111426228A (en) * | 2020-05-18 | 2020-07-17 | 安徽东能换热装备有限公司 | Grid type turbulence device of plate type converter |
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