CN111561831A - L-shaped baffle plate shell-and-tube heat exchanger and application thereof - Google Patents
L-shaped baffle plate shell-and-tube heat exchanger and application thereof Download PDFInfo
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- CN111561831A CN111561831A CN202010462179.8A CN202010462179A CN111561831A CN 111561831 A CN111561831 A CN 111561831A CN 202010462179 A CN202010462179 A CN 202010462179A CN 111561831 A CN111561831 A CN 111561831A
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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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/06—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits having a single U-bend
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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
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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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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses an L-shaped baffle plate shell-and-tube heat exchanger and application thereof, wherein the L-shaped baffle plate shell-and-tube heat exchanger comprises a shell, a baffle plate group, a fixed tube plate and a heat transfer tube group; the fixed tube plate is divided into a first fixed tube plate and a second fixed tube plate, the first fixed tube plate is fixed on the left side in the shell cavity of the shell, the second fixed tube plate is fixed on the right side in the shell cavity of the shell, a heat exchange cavity is formed between the first fixed tube plate and the second fixed tube plate, and a refrigerant cavity is formed in the left side of the first fixed tube plate; the fixed tube plate is provided with a plurality of heat exchange tube fixing holes for fixing the heat exchange tube set; the inlet of the heat exchange tube group is arranged on a heat exchange tube fixing hole of the first fixing tube plate, which is positioned above the split-range partition plate; and the outlet of the heat exchange tube group is arranged on a heat exchange tube fixing hole of the first fixing tube plate below the split partition plate. According to the invention, the turbulence degree of the fluid in the shell is enhanced by changing the baffle plate structure in the heat exchanger, and meanwhile, the area of a heat exchange dead zone is reduced, so that the heat exchange is enhanced, and the economy of equipment is further improved.
Description
Technical Field
The invention relates to the technical field of heat exchange equipment, in particular to an L-shaped baffle plate shell-and-tube heat exchanger and application thereof.
Background
With the continuous increase of global energy crisis, people pay more and more attention to the secondary utilization of energy, and the heat exchanger is widely applied to various industries as an important energy exchange device. The traditional single-arch baffle shell-and-tube heat exchanger is the heat exchange equipment which is most widely used and has the highest market share at present. Because fluid easily produces the heat transfer dead zone at baffle back flow district when the shell side flows for heat transfer area utilizes inadequately fully, and effective heat transfer area reduces, thereby makes shell side heat transfer ability low, and traditional equipment efficiency is not high, so energy-saving heat exchanger equipment's development will certainly be present and future important subject.
In recent years, with the development of heat exchangers and energy-saving and environment-friendly industries, a plurality of research institutions invent novel heat exchanger baffle structures based on the purposes of energy conservation and environment protection, but the problems of easy scaling, large vibration and the like of detention areas exist. Patent CN201621183760.1 discloses a "heat exchanger with multiple helical baffle plates", which aims to install a large helical baffle plate with holes in the shell, thus improving heat exchange area, improving heat exchange efficiency and reducing dirt deposition, but the method only aims to solve the problem that the strengthening heat exchange is not improved by reducing dirt deposition, and the risk of failure exists because small helical baffle plates are wound on the heat exchange tubes, thus increasing shell pass resistance; patent cn201911419994.x discloses a "Y-and semi-Y-combined apertured baffle heat exchanger", and the method provides a Y-and semi-Y-combined apertured baffle heat exchanger, but the efficiency is improved low, the shell side resistance of the equipment is increased, and the equipment is prone to failure.
Therefore, how to provide an L-shaped baffle shell-and-tube heat exchanger with high heat exchange efficiency and the application thereof are problems to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides an L-shaped baffle shell-and-tube heat exchanger and an application thereof, so as to solve the problems presented in the background art, and by changing the baffle plate structure in the heat exchanger, the turbulence degree of the fluid in the shell is enhanced, and at the same time, the area of the heat exchange dead zone is reduced, the heat exchange is enhanced, and further, the economical efficiency of the equipment is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
an L-shaped baffle shell-and-tube heat exchanger comprises a shell, a baffle group, a fixed tube plate and a heat transfer tube group;
the fixed tube plate is divided into a first fixed tube plate and a second fixed tube plate, the first fixed tube plate is fixed on the left side in the shell cavity of the shell, the second fixed tube plate is fixed on the right side in the shell cavity of the shell, a heat exchange cavity is formed between the first fixed tube plate and the second fixed tube plate, and a refrigerant cavity is formed in the left side of the first fixed tube plate;
a heat medium outlet is formed in the top of one side, close to the first fixed tube plate, of the heat exchange cavity, and a heat medium inlet is formed in the bottom of one side, close to the second fixed tube plate, of the heat exchange cavity; the refrigerant cavity is divided into an upper refrigerant cavity and a lower refrigerant cavity by a split-range partition plate, the upper refrigerant cavity is provided with a refrigerant inlet, and the lower refrigerant cavity is provided with a refrigerant outlet;
the fixed tube plate is provided with a plurality of heat exchange tube fixing holes for fixing the heat exchange tube set; the inlet of the heat exchange tube group is arranged on the heat exchange tube fixing hole of the first fixing tube plate above the split partition plate and is communicated with the upper refrigerant cavity; and the outlet of the heat exchange tube group is arranged on the heat exchange tube fixing hole of the first fixing tube plate below the split partition plate and is communicated with the lower refrigerant cavity.
Preferably, in the L-shaped baffle shell-and-tube heat exchanger, the baffle group includes four L-shaped baffles, and a baffle channel is formed between the four L-shaped baffles and the shell; the L-shaped baffle plate is formed by bending a circular plate with the same inner diameter as the shell along a chord of the circular plate, so that the L-shaped baffle plate comprises a vertical plate and a horizontal plate with an included angle of 90 degrees, and the vertical plate is provided with a heat transfer pipe through hole for the heat transfer pipe group to pass through.
Preferably, in the L-shaped baffle shell-and-tube heat exchanger, the L-shaped baffle is sequentially divided into a first L-shaped baffle, a second L-shaped baffle, a third L-shaped baffle and a fourth L-shaped baffle along the direction from the heat medium outlet to the heat medium inlet; the vertical plate of the first L-shaped baffle plate is connected with the top of the heat exchange cavity, and the horizontal plate faces the direction of the heat medium inlet; the vertical plate of the second L-shaped baffle plate is connected with the bottom of the heat exchange cavity, and the horizontal plate faces the direction of the heat medium inlet; the vertical plate of the third L-shaped baffle plate is connected with the top of the heat exchange cavity, and the horizontal plate faces the direction of the heat medium outlet; and the vertical plate of the fourth L-shaped baffle plate is connected with the bottom of the heat exchange cavity, and the horizontal plate faces the direction of the heat medium outlet.
Preferably, in the shell-and-tube heat exchanger with the L-shaped baffle plate, the arc edge of the vertical plate is connected with the heat exchange cavity.
Preferably, in the L-shaped baffle shell-and-tube heat exchanger, the heat exchange tube set comprises a first U-shaped heat exchange tube, a second U-shaped heat exchange tube and a third U-shaped heat exchange tube, the third U-shaped heat exchange tube is located at the inner side of the second U-shaped heat exchange tube, and the second U-shaped heat exchange tube is located at the inner side of the first U-shaped heat exchange tube; the inlets of the first U-shaped heat exchange tube, the second U-shaped heat exchange tube and the third U-shaped heat exchange tube are arranged on the heat exchange tube fixing holes of the first fixing tube plate, which are positioned above the split-ranging partition plate, and are communicated with the upper refrigerant cavity; outlets of the first U-shaped heat exchange tube, the second U-shaped heat exchange tube and the third U-shaped heat exchange tube are arranged on the heat exchange tube fixing holes of the first fixing tube plate, which are positioned below the split-ranging partition plate, and are communicated with the lower refrigerant cavity; the U-shaped bends of the first U-shaped heat exchange tube, the second U-shaped heat exchange tube and the third U-shaped heat exchange tube are located on the right side of the second fixed tube plate.
Preferably, in the shell-and-tube heat exchanger with the L-shaped baffle plate, 6 first U-shaped heat exchange tubes are horizontally arranged, 5 second U-shaped heat exchange tubes are horizontally arranged, and 4 third U-shaped heat exchange tubes are horizontally arranged.
Preferably, in the shell-and-tube heat exchanger with the L-shaped baffle plate, 30 heat exchange tube fixing holes are formed in the fixing tube plate, and the 30 heat exchange tube fixing holes are symmetrically distributed on two sides of the projection of the split diaphragm on the fixing tube plate.
Preferably, in the above L-shaped baffle shell-and-tube heat exchanger, the vertical plate is provided with 26 heat transfer tube perforations.
Preferably, in the shell-and-tube heat exchanger with the L-shaped baffle plate, the first U-shaped heat exchange tube, the second U-shaped heat exchange tube and the third U-shaped heat exchange tube are all U-shaped copper tubes.
An L-shaped baffle plate shell-and-tube heat exchanger is applied to an evaporator, a cold medium enters an upper refrigerant cavity through a refrigerant inlet, enters a heat exchange tube group through an inlet of the heat exchange tube group in a heat exchange tube fixing hole of a first fixing tube plate, exchanges heat with a heat medium through the heat exchange tube group in a heat exchange cavity of a shell, and is heated by the heat medium through two shell passes in the heat exchange tube group and flows out through a refrigerant outlet;
the heat medium enters the heat exchange cavity of the shell through the heat medium inlet, passes through the baffling channel formed by the four L-shaped baffle plates and the shell, passes through the first U-shaped heat exchange tube, the gap between the second U-shaped heat exchange tube and the third U-shaped heat exchange tube, transfers heat to the heat medium, and flows out through the heat medium outlet.
Compared with the prior art, the invention discloses an L-shaped baffle plate shell-and-tube heat exchanger and application thereof, and has the following advantages:
1. the heat exchanger is energy-saving, the heat exchanger with the L-shaped baffle plates is adopted, the convection heat exchange of internal fluid is stronger, the Nussell number of the heat exchanger is improved by 9.14 percent compared with that of a common baffle plate heat exchanger, the heat transfer efficiency is improved by 8 percent compared with that of traditional equipment, and the overall heat exchange capacity is better than that of the traditional heat exchanger.
2. The L-shaped baffle plate heat exchanger can reduce the influence of heat exchange dead zones and achieve the purpose of heat exchange enhancement.
3. The method is easy to popularize, can be used for modifying on the basis of the original equipment, has low modification cost and is beneficial to popularization and promotion.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic structural view of a fixed tube sheet;
FIG. 3 is a front view of a second L-shaped baffle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses an L-shaped baffle plate shell-and-tube heat exchanger and application thereof.
The embodiment discloses an L-shaped baffle shell-and-tube heat exchanger, which comprises a shell 1, a baffle group, a fixed tube plate and a heat transfer tube group;
the fixed tube plate is divided into a first fixed tube plate 2 and a second fixed tube plate 3, the first fixed tube plate 2 is fixed on the left side in a shell cavity of the shell 1, the second fixed tube plate 3 is fixed on the right side in the shell cavity of the shell 1, a heat exchange cavity 3 is arranged between the first fixed tube plate 2 and the second fixed tube plate 3, and the left side of the first fixed tube plate 2 is a refrigerant cavity;
a heat medium outlet 4 is formed in the top of one side, close to the first fixed tube plate 2, of the heat exchange cavity 3, and a heat medium inlet 5 is formed in the bottom of one side, close to the second fixed tube plate 3, of the heat exchange cavity 3; the refrigerant cavity is divided into an upper refrigerant cavity 7 and a lower refrigerant cavity 8 by a split-range partition plate 6, the upper refrigerant cavity 7 is provided with a refrigerant inlet 9, and the lower refrigerant cavity 8 is provided with a refrigerant outlet 10;
a plurality of heat exchange tube fixing holes 11 for fixing the heat exchange tube set are formed in the fixed tube plate; the inlet of the heat exchange tube set is arranged on a heat exchange tube fixing hole 11 of the first fixed tube plate 2 above the split partition plate 6 and is communicated with the upper refrigerant cavity 7; the outlet of the heat exchange tube group is arranged on a heat exchange tube fixing hole 11 of the first fixed tube plate 2 below the split partition plate 6 and communicated with the lower refrigerant cavity 8.
In order to further optimize the technical scheme, the baffle group comprises four L-shaped baffles, and baffle channels are formed between the four L-shaped baffles and the shell 1; the L-shaped baffle plate is formed by bending a circular plate with the same inner diameter as the shell 1 along a chord thereof, so that the L-shaped baffle plate comprises a vertical plate 12 and a horizontal plate 13 with an included angle of 90 degrees, and the vertical plate 12 is provided with a heat transfer pipe perforation 14 for a heat transfer pipe group to pass through; the vertical height of the vertical plate 12 is 190mm, the length of the horizontal plate 13 is 130mm, and the distance between the adjacent horizontal plates 13 is 210 mm.
In order to further optimize the technical scheme, the L-shaped baffle plate is sequentially divided into a first L-shaped baffle plate 15, a second L-shaped baffle plate 16, a third L-shaped baffle plate 17 and a fourth L-shaped baffle plate 18 along the direction from the heat medium outlet 4 to the heat medium inlet 5; the vertical plate 12 of the first L-shaped baffle plate 15 is connected with the top of the heat exchange cavity 3, and the horizontal plate 13 faces the direction of the heat medium inlet 5; the vertical plate 12 of the second L-shaped baffle plate 16 is connected with the bottom of the heat exchange cavity 3, and the horizontal plate 13 faces the direction of the heat medium inlet 5; the vertical plate 12 of the third L-shaped baffle plate 17 is connected with the top of the heat exchange cavity 3, and the horizontal plate 13 faces the direction of the heat medium outlet 4; the vertical plate 12 of the fourth L-shaped baffle 18 is connected with the bottom of the heat exchange chamber 3, and the horizontal plate 13 faces the direction of the heat medium outlet 4.
In order to further optimize the above technical solution, the circular arc edge of the vertical plate 12 is connected with the heat exchange cavity 3.
In order to further optimize the technical scheme, the heat exchange tube group comprises a first U-shaped heat exchange tube 19, a second U-shaped heat exchange tube 20 and a third U-shaped heat exchange tube 21, wherein the third U-shaped heat exchange tube 21 is positioned at the inner side of the second U-shaped heat exchange tube 20, and the second U-shaped heat exchange tube 20 is positioned at the inner side of the first U-shaped heat exchange tube 19; inlets of a first U-shaped heat exchange tube 19, a second U-shaped heat exchange tube 20 and a third U-shaped heat exchange tube 21 are arranged on the heat exchange tube fixing hole 11 of the first fixing tube plate 2 above the pass partition plate 6 and are communicated with the upper refrigerant cavity 7; outlets of a first U-shaped heat exchange tube 19, a second U-shaped heat exchange tube 20 and a third U-shaped heat exchange tube 21 are arranged on a heat exchange tube fixing hole 11 of the first fixing tube plate 2 below the pass partition plate 6 and communicated with the lower refrigerant cavity 8; the U-shaped bends of the first U-shaped heat exchange tube 19, the second U-shaped heat exchange tube 20 and the third U-shaped heat exchange tube 21 are positioned at the right side of the second fixed tube plate 3.
In order to further optimize the technical scheme, 6 first U-shaped heat exchange tubes 19 are horizontally arranged, 5 second U-shaped heat exchange tubes 20 are horizontally arranged, and 4 third U-shaped heat exchange tubes 21 are horizontally arranged.
In order to further optimize the technical scheme, 30 heat exchange tube fixing holes 11 are formed in the fixed tube plate, and the 30 heat exchange tube fixing holes 11 are symmetrically distributed on two sides of the projection of the split partition plate 6 on the fixed tube plate.
In order to further optimize the above technical solution, 26 heat transfer pipe perforations 14 are provided on the vertical plate 12.
In order to further optimize the technical scheme, the first U-shaped heat exchange tube 19, the second U-shaped heat exchange tube 20 and the third U-shaped heat exchange tube 21 are all U-shaped copper tubes; the diameters of the first U-shaped heat exchange tube 19, the second U-shaped heat exchange tube 20 and the third U-shaped heat exchange tube 21 are all 19mm, and the wall thicknesses are all 1.2 mm.
In order to further optimize the technical scheme, the flow direction of the cold medium is opposite to that of the heat medium.
An L-shaped baffle plate shell-and-tube heat exchanger is applied to an evaporator, a refrigerant medium enters an upper refrigerant cavity 7 through a refrigerant inlet 9, enters a heat exchange tube group through an inlet of the heat exchange tube group in a heat exchange tube fixing hole 11 of a first fixing tube plate 2, exchanges heat with a heat medium through the heat exchange tube group in a heat exchange cavity 3 of a shell 1, is heated by the heat medium through two shell passes in the heat exchange tube group, and flows out through a refrigerant outlet 10;
the heat medium enters the heat exchange cavity 3 of the shell 1 through the heat medium inlet 5, passes through a baffling channel formed by the four L-shaped baffle plates and the shell 1, passes through a gap between the first U-shaped heat exchange tube 19, the second U-shaped heat exchange tube 20 and the third U-shaped heat exchange tube 21, transfers heat to the heat medium, and flows out through the heat medium outlet 4.
In the embodiment, a sewage source heat pump heating system proposed by a certain heating company is taken as an example, the heating company is close to a sewage treatment plant, 40 ten thousand tons of reclaimed water in the sewage treatment plant every day is fully utilized, the heat pump is utilized to carry out two-stage heat pump heating on the heating circulating water by utilizing the low-grade energy of the reclaimed water, and the multistage heating such as steam exhaust waste heat heating of a steam turbine is matched to achieve the required heating temperature, so that the energy-saving and emission-reducing effects are obvious. The heat exchanger is used as an important device in the heat pump, and the theoretical heating coefficient of the heat pump can be improved by improving the efficiency of the heat exchanger.
The refrigerant is decompressed and expanded in a throttle valve of the heat pump system to form liquid vaporific refrigerant, the liquid vaporific refrigerant enters an upper refrigerant cavity 7 from a refrigerant inlet 9 of the evaporator, enters a heat exchange tube group through an inlet of the heat exchange tube group in a heat exchange tube fixing hole 11 of the first fixing tube plate 2, passes through the heat exchange tube group in a heat exchange cavity 3 of the shell 1, is heated by water in the heat exchange cavity 3, is heated into a high-temperature vaporific state, and finally is communicated to the compressor for continuous work through a refrigerant outlet 10.
Reclaimed water of a sewage treatment plant enters a heat medium inlet 5 of an evaporator along a pipeline, enters a heat exchange cavity 3 of a shell 1, passes through a baffling channel formed by four L-shaped baffle plates and the shell 1, passes through a first U-shaped heat exchange tube 19, a gap between a second U-shaped heat exchange tube 20 and a third U-shaped heat exchange tube 21, transfers heat to a refrigerant medium, reduces the temperature, and finally flows out from a heat medium outlet 4. Compared with the traditional equipment, the heat exchange efficiency of the L-shaped baffle plate evaporator is improved by 8 percent, and the purpose of energy conservation can be realized.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are only for the convenience of description of the invention and to simplify the description, and do not indicate or imply that the referred device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An L-shaped baffle shell-and-tube heat exchanger is characterized by comprising a shell, a baffle group, a fixed tube plate and a heat transfer tube group;
the fixed tube plate is divided into a first fixed tube plate and a second fixed tube plate, the first fixed tube plate is fixed on the left side in the shell cavity of the shell, the second fixed tube plate is fixed on the right side in the shell cavity of the shell, a heat exchange cavity is formed between the first fixed tube plate and the second fixed tube plate, and a refrigerant cavity is formed in the left side of the first fixed tube plate;
a heat medium outlet is formed in the top of one side, close to the first fixed tube plate, of the heat exchange cavity, and a heat medium inlet is formed in the bottom of one side, close to the second fixed tube plate, of the heat exchange cavity; the refrigerant cavity is divided into an upper refrigerant cavity and a lower refrigerant cavity by a split-range partition plate, the upper refrigerant cavity is provided with a refrigerant inlet, and the lower refrigerant cavity is provided with a refrigerant outlet;
the fixed tube plate is provided with a plurality of heat exchange tube fixing holes for fixing the heat exchange tube set; the inlet of the heat exchange tube group is arranged on the heat exchange tube fixing hole of the first fixing tube plate above the split partition plate and is communicated with the upper refrigerant cavity; and the outlet of the heat exchange tube group is arranged on the heat exchange tube fixing hole of the first fixing tube plate below the split partition plate and is communicated with the lower refrigerant cavity.
2. An L-shaped baffle shell and tube heat exchanger as claimed in claim 1, wherein the baffle group comprises four L-shaped baffles, and baffle channels are formed between the four L-shaped baffles and the shell; the L-shaped baffle plate is formed by bending a circular plate with the same inner diameter as the shell along a chord of the circular plate, so that the L-shaped baffle plate comprises a vertical plate and a horizontal plate with an included angle of 90 degrees, and the vertical plate is provided with a heat transfer pipe through hole for the heat transfer pipe group to pass through.
3. An L-shaped baffle shell-and-tube heat exchanger as claimed in claim 2, wherein the L-shaped baffle is divided into a first L-shaped baffle, a second L-shaped baffle, a third L-shaped baffle and a fourth L-shaped baffle in sequence along the direction from the heat medium outlet to the heat medium inlet; the vertical plate of the first L-shaped baffle plate is connected with the top of the heat exchange cavity, and the horizontal plate faces the direction of the heat medium inlet; the vertical plate of the second L-shaped baffle plate is connected with the bottom of the heat exchange cavity, and the horizontal plate faces the direction of the heat medium inlet; the vertical plate of the third L-shaped baffle plate is connected with the top of the heat exchange cavity, and the horizontal plate faces the direction of the heat medium outlet; and the vertical plate of the fourth L-shaped baffle plate is connected with the bottom of the heat exchange cavity, and the horizontal plate faces the direction of the heat medium outlet.
4. An L-shaped baffle shell and tube heat exchanger as set forth in claim 3, wherein the circular arc edges of said vertical plates are connected with said heat exchange chamber.
5. An L-shaped baffle shell and tube heat exchanger as set forth in claim 4 wherein said heat exchange tube set comprises a first U-shaped heat exchange tube, a second U-shaped heat exchange tube and a third U-shaped heat exchange tube, said third U-shaped heat exchange tube being located inside said second U-shaped heat exchange tube, said second U-shaped heat exchange tube being located inside said first U-shaped heat exchange tube; the inlets of the first U-shaped heat exchange tube, the second U-shaped heat exchange tube and the third U-shaped heat exchange tube are arranged on the heat exchange tube fixing holes of the first fixing tube plate, which are positioned above the split-ranging partition plate, and are communicated with the upper refrigerant cavity; outlets of the first U-shaped heat exchange tube, the second U-shaped heat exchange tube and the third U-shaped heat exchange tube are arranged on the heat exchange tube fixing holes of the first fixing tube plate, which are positioned below the split-ranging partition plate, and are communicated with the lower refrigerant cavity; the U-shaped bends of the first U-shaped heat exchange tube, the second U-shaped heat exchange tube and the third U-shaped heat exchange tube are located on the right side of the second fixed tube plate.
6. An L-shaped baffle shell and tube heat exchanger as set forth in claim 5 wherein said first U-shaped heat exchange tubes are horizontally arranged with 6, said second U-shaped heat exchange tubes are horizontally arranged with 5, and said third U-shaped heat exchange tubes are horizontally arranged with 4.
7. An L-shaped baffle shell and tube heat exchanger as recited in claim 6 wherein said fixed tube sheet is provided with 30 said heat exchange tube fixing holes, and said 30 heat exchange tube fixing holes are symmetrically distributed on both sides of the projection of said split partition plate on said fixed tube sheet.
8. An L-shaped baffle shell and tube heat exchanger as set forth in claim 7, characterized in that said vertical plate is provided with 26 perforations for heat transfer tubes.
9. An L-shaped baffle shell and tube heat exchanger as recited in claim 1 wherein the first, second and third U-shaped heat exchange tubes are all U-shaped copper tubes.
10. An application of an L-shaped baffle plate shell-and-tube heat exchanger on an evaporator is characterized in that a cold medium enters an upper refrigerant cavity through a refrigerant inlet, enters a heat exchange tube group through an inlet of the heat exchange tube group in a heat exchange tube fixing hole of a first fixing tube plate, exchanges heat with a heat medium through the heat exchange tube group in a heat exchange cavity of a shell, and the cold medium is heated by the heat medium through two shell passes in the heat exchange tube group and flows out through a refrigerant outlet;
the heat medium enters the heat exchange cavity of the shell through the heat medium inlet, passes through the baffling channel formed by the four L-shaped baffle plates and the shell, passes through the first U-shaped heat exchange tube, the gap between the second U-shaped heat exchange tube and the third U-shaped heat exchange tube, transfers heat to the heat medium, and flows out through the heat medium outlet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010462179.8A CN111561831A (en) | 2020-05-27 | 2020-05-27 | L-shaped baffle plate shell-and-tube heat exchanger and application thereof |
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| CN202010462179.8A CN111561831A (en) | 2020-05-27 | 2020-05-27 | L-shaped baffle plate shell-and-tube heat exchanger and application thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113587686A (en) * | 2021-08-10 | 2021-11-02 | 兰州恒达石化机械有限公司 | Efficient baffle plate type heat exchanger |
| CN113776362A (en) * | 2021-08-20 | 2021-12-10 | 杜麒麟 | High-temperature shell-and-tube heat exchanger |
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2020
- 2020-05-27 CN CN202010462179.8A patent/CN111561831A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113587686A (en) * | 2021-08-10 | 2021-11-02 | 兰州恒达石化机械有限公司 | Efficient baffle plate type heat exchanger |
| CN113776362A (en) * | 2021-08-20 | 2021-12-10 | 杜麒麟 | High-temperature shell-and-tube heat exchanger |
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