CN111457753B - Plate condenser capable of discharging liquid in middle - Google Patents
Plate condenser capable of discharging liquid in middle Download PDFInfo
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- CN111457753B CN111457753B CN202010242520.9A CN202010242520A CN111457753B CN 111457753 B CN111457753 B CN 111457753B CN 202010242520 A CN202010242520 A CN 202010242520A CN 111457753 B CN111457753 B CN 111457753B
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- cooling water
- heat exchange
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- liquid
- water flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/04—Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a plate type condenser capable of discharging liquid in the middle, which comprises a plurality of A-type heat exchange plates, a plurality of B-type heat exchange plates, a middle liquid discharge pipe, side sealing plates, an upper box body and a lower box body; the A-type heat exchange plates and the B-type heat exchange plates are alternately arranged to form alternately arranged steam flow passages and cooling water flow passages; the side sealing plates are connected to two sides of the heat exchange plate row to seal the flow channel; the upper box body and the lower box body are respectively connected to the upper end and the lower end of the heat exchange plate row to form an inlet and an outlet of a steam flow passage and a cooling water flow passage; the middle part of the A-shaped heat exchange plate is provided with a V-shaped gas-liquid separation cavity, the middle part of the V-shaped gas-liquid separation cavity, which is positioned on the upper end surface of the steam flow passage, is provided with a gas-liquid inlet, and two ends of the lower end surface are provided with gas outlets; the middle liquid discharge pipe is communicated with the bottoms of the V-shaped gas-liquid separation cavities. The invention can accelerate the liquid discharge speed, reduce the thickness of the condensate liquid film attached on the plate, reduce the heat conduction resistance of the liquid film and increase the phase change heat transfer coefficient of the plate condenser.
Description
Technical Field
The invention relates to the field of condensers, in particular to a plate condenser capable of discharging liquid in the middle.
Background
Plate heat exchangers are heat exchange devices with high heat transfer coefficients and compact structures, and have been widely used in liquid-liquid heat exchangers. Because the phase change heat exchange coefficient is far larger than the non-phase change heat exchange coefficient, the utilization of the plate heat exchanger for condensation heat exchange is a development trend of the current condenser, and most of the plate condensers directly adopt a liquid-liquid plate heat exchanger. Different from single-phase liquid convection heat exchange, vapor condensation heat exchange in a plate heat exchanger is a complex process that gas-liquid two-phase flow not only has heat transfer but also has mass transfer in a small space. Because the plate interval of the plate heat exchanger is smaller, the flow channel structure is complex, the on-way resistance is large, the steam condensate cannot be discharged in time and is often gathered at the rear half part of the condenser to form a thick liquid film, the thermal resistance is increased sharply, and the heat exchange efficiency is poor. Therefore, the direct use of a liquid-liquid plate heat exchanger as a condenser does not fully exploit the advantage of high heat exchange efficiency of a plate heat exchanger.
Aiming at the problem that a condenser is difficult to drain liquid, researchers provide a new idea of enhancing in-pipe condensation by adopting a method for improving the dryness of a working medium, a liquid-separating condensation enhanced heat transfer method of short pipe heat transfer, gas-liquid separation between pipes and constant speed in the whole process is constructed, and the average dryness of in-pipe condensation is improved by sectional condensation and gas-liquid separation. However, at present, the gas-liquid separation and condensation technology is only studied in a tube-fin air condenser, and the research in a plate heat exchanger is blank.
Disclosure of Invention
The invention aims to make up the defects of the prior art, provides a plate condenser capable of discharging liquid in the middle, and realizes the purpose of strengthening gas-liquid two-phase flow heat exchange by utilizing the structural design of discharging condensate in the middle.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a plate condenser capable of discharging liquid in the middle comprises a plurality of A-type heat exchange plates, a plurality of B-type heat exchange plates, a middle liquid discharge pipe, side sealing plates, an upper box body and a lower box body; the A-type heat exchange plates and the B-type heat exchange plates are alternately arranged to form alternately arranged steam flow passages and cooling water flow passages; the side sealing plates are connected to two sides of the heat exchange plate row to seal the flow channel; the upper box body and the lower box body are respectively connected to the upper end and the lower end of the heat exchange plate row to form an inlet and an outlet of a steam flow passage and a cooling water flow passage; the middle part of the A-shaped heat exchange plate is provided with a V-shaped gas-liquid separation cavity, the middle part of the V-shaped gas-liquid separation cavity, which is positioned on the upper end surface of the steam flow passage, is provided with a gas-liquid inlet, and two ends of the lower end surface are provided with gas outlets; the middle liquid discharge pipe is communicated with the bottoms of the V-shaped gas-liquid separation cavities.
As an improvement of the invention, the middle liquid discharge pipe vertically penetrates through the bottom of each V-shaped gas-liquid separation cavity, and a liquid discharge port is arranged at the corresponding section of each V-shaped gas-liquid separation cavity.
As an improvement of the invention, the middle part of the B-shaped heat exchange plate is provided with a V-shaped groove.
As an improvement of the invention, the upper box body is provided with a steam inlet and a cooling water outlet, the bottom surface of the upper box body is provided with steam flow holes communicated with each steam flow passage and cooling water flow holes communicated with each cooling water flow passage, and the cooling water flow holes are respectively connected with the cooling water outlet through pipelines.
As an improvement of the invention, the lower box body is provided with a condensate outlet and a cooling water inlet, the top surface of the lower box body is provided with steam flow holes communicated with each steam flow passage and cooling water flow holes communicated with each cooling water flow passage, and the cooling water flow holes are respectively connected with a cooling water outlet through pipelines.
Preferably, each vapor flow passage is provided with a plurality of vapor flow holes distributed at intervals.
Preferably, each cooling water flow passage is provided with a plurality of cooling water flow holes distributed at intervals.
Compared with the prior art, the invention has the beneficial effects that:
1. the V-shaped gas-liquid separation cavity is arranged on the A-type heat exchange plate, and due to the difference of specific gravity, condensate sinks at the middle low position of the separation cavity and flows out through the liquid discharge pipe to form a liquid seal at the same time, so that steam is prevented from leaking through the liquid discharge pipe, and the steam flows upwards along two sides of the separation cavity and flows out through the gas outlet, so that condensate on the plate sheet can be discharged in time.
2. The invention arranges the inlet and outlet of the cold and hot fluid on the upper and lower box bodies at the two ends of the heat exchange plate row, simplifies the flow passage design, and ensures that the whole device has simple and compact structure.
Drawings
FIG. 1 is a schematic view of the overall construction of a plate condenser according to the present invention;
FIG. 2A is a partial view of a middle portion of a type A heat exchanger plate of the present invention;
FIG. 2B is a partial view of the middle portion of a type B heat exchanger plate of the present invention;
FIG. 3 is a front view of the plate condenser of the present invention;
FIG. 4 is a sectional view A-A of FIG. 3;
FIG. 5 is an enlarged view of section C of FIG. 4;
FIG. 6 is a schematic diagram of the operation of the V-shaped gas-liquid separation chamber of the present invention;
FIG. 7 is a schematic flow diagram of the steam, cooling water of the present invention;
FIG. 8 is a schematic view of the internal structure of the upper case of the present invention;
FIG. 9 is a cross-sectional view B-B of FIG. 3;
description of reference numerals: 1, putting the box body; 2, a box body is arranged; 3-side sealing plate; 4-a type heat exchange plate; 5-type B heat exchange plates; 6-middle liquid discharge pipe; 7-V-shaped gas-liquid separation cavity; 8-V-shaped grooves; 9-a vapor flow channel; 10-cooling water flow channel; 11-a first condensation zone; 12-a second condensation zone; 13-a liquid discharge port; 14-a vapor inlet; 15-cooling water outlet; 16-cooling water inlet; 17-condensate outlet, 18-gas-liquid inlet; 19-a gas outlet; 20-steam flow holes; 21-Cooling Water flow holes.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 5, the plate condenser capable of intermediate drainage of the present embodiment mainly comprises an upper tank 1, a lower tank 2, side sealing plates 3, a-type heat exchange plates 4, a B-type heat exchange plates 5, and an intermediate drainage pipe 6. All parts can be made of plates and pipes through a die stamping and welding process, the parts are connected together through brazing, and the specific processing process is the same as that of the existing corrugated plate type heat exchanger, and detailed description is omitted.
In the present embodiment, 4 a-type heat exchange plates 4 and 5B-type heat exchange plates 5 are alternately arranged to form 8 flow channels, wherein 4 are vapor flow channels 9, and 4 are cooling water flow channels 10, and the condensation and heat exchange of the vapor are performed in these alternately arranged flow channels. The 2 side closure plates 3 are welded laterally to the heat exchanger plate rows to seal the flow channels. The upper box body 1 and the lower box body 2 are respectively welded at the upper end and the lower end of the heat exchange plate row, a steam inlet 14 and a cooling water outlet 15 are arranged on the upper box body 1, a cooling water inlet 16 and a condensate outlet 17 are arranged on the lower box body 2, and the upper box body and the lower box body are used as the connection between an external steam pipe and a cooling water pipe and a flow channel and play a role in distributing flow.
A. The inclination angle of the B-shaped heat exchange plate except the corrugation is reverse, the outline dimension is the same as the corrugation shape, a V-shaped gas-liquid separation cavity 7 is arranged in the middle of the A-shaped heat exchange plate 4, the steam flow channel 9 is divided into a first condensation area 11 at the upper part and a second condensation area 12 at the lower part, the section of the V-shaped gas-liquid separation cavity 7 is rectangular, a gas-liquid inlet 19 is arranged in the middle of the upper end face of the steam flow channel 9, and gas outlets 19 are arranged at two ends of the lower end face. The middle of the B-shaped heat exchange plate 5 is provided with a V-shaped groove 8 which is a rectangular groove with one open side and can be attached to the V-shaped gas-liquid separation cavity 7, so that the installation is convenient, and a middle gas-liquid separation channel is marked. The middle liquid discharge pipe 6 penetrates through a liquid discharge hole in the middle of the heat exchange plate and is vertically inserted into the bottom of the V-shaped gas-liquid separation cavity 7, and a liquid discharge port 13 is arranged at a section corresponding to each V-shaped gas-liquid separation cavity 7 so as to guide out condensate.
As shown in fig. 6 and 7, when the condenser works, steam enters the upper tank 1 from the steam inlet 14, firstly enters the first condensation area 11 along the steam flow channel 9, a gas-liquid two-phase flow consisting of condensate and steam condensed from part of the steam flows downwards, and enters the separation cavity through the gas-liquid inlet 18 in the middle of the upper end surface of the V-shaped gas-liquid separation cavity 7. Due to the difference of specific gravity, the condensate sinks to the middle low position of the V-shaped gas-liquid separation cavity 7 and flows out of the condenser through a liquid outlet 13 on the side surface or the bottom surface of the middle liquid discharge pipe 6, and simultaneously, a liquid seal is formed to prevent steam from leaking through the middle liquid discharge pipe 6. The vapor flows upwards along the two sides of the separation chamber and flows out of the separation chamber from the gas outlets 19 at the two ends, enters the second condensation area 12 to be condensed, finally enters the lower box body 2 and flows out through the condensate outlet 17. The middle V-shaped groove 8 of the cooling water flow channel 10 has no blocking effect, cooling water enters the lower box body 2 from the cooling water inlet 16, flows upwards along the cooling water flow channel 10 to perform countercurrent heat exchange with steam in the steam flow channel 9, enters the upper box body 1 and flows out from the cooling water outlet 15.
As shown in fig. 8 and 9, the upper case 1 and the lower case 2 have symmetrical structures and the same size. The upper box body 1 is used for steam inlet and cooling water outlet and mainly plays a role in uniformly distributing steam. The lower box body 2 is used for cooling water to enter, and condensate or gas-liquid two-phase flows out (if the condensation is incomplete), so that the effect of uniformly distributing the cooling water is mainly achieved. In the above case 1, the vapor flow holes 20 and the cooling water flow holes 21 are alternately arranged on the bottom surface, each vapor flow passage 9 corresponds to one row of 4 vapor flow holes 20, each cooling water flow passage 10 corresponds to one row of 4 cooling water flow holes 21, and each cooling water flow hole 21 is connected to the cooling water outlet 15 through a pipe. Therefore, the cooling water cannot enter the box body, and the space in the box body only flows steam, so that the steam and the cooling water are uniformly distributed.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (3)
1. A plate condenser capable of middle liquid drainage is characterized in that: the heat exchanger comprises a plurality of A-type heat exchange plates, a plurality of B-type heat exchange plates, a middle liquid discharge pipe, side sealing plates, an upper box body and a lower box body; the A-type heat exchange plates and the B-type heat exchange plates are alternately arranged to form alternately arranged steam flow passages and cooling water flow passages; the side sealing plates are connected to two sides of the heat exchange plate row to seal the flow channel; the upper box body and the lower box body are respectively connected to the upper end and the lower end of the heat exchange plate row to form an inlet and an outlet of a steam flow passage and a cooling water flow passage; the middle part of the A-shaped heat exchange plate is provided with a V-shaped gas-liquid separation cavity, the middle part of the V-shaped gas-liquid separation cavity, which is positioned on the upper end surface of the steam flow passage, is provided with a gas-liquid inlet, and two ends of the lower end surface are provided with gas outlets; the middle liquid discharge pipe is communicated with the bottoms of the V-shaped gas-liquid separation cavities;
the upper box body is provided with a steam inlet and a cooling water outlet, the bottom surface of the upper box body is provided with steam flow holes communicated with each steam flow channel and cooling water flow holes communicated with each cooling water flow channel, and the cooling water flow holes are respectively connected with the cooling water outlet through pipelines; the lower box body is provided with a condensate outlet and a cooling water inlet, the top surface of the lower box body is provided with steam flow holes communicated with each steam flow channel and cooling water flow holes communicated with each cooling water flow channel, and the cooling water flow holes are respectively connected with a cooling water outlet through pipelines; each steam flow channel is provided with a plurality of steam flow holes distributed at intervals, and each cooling water flow channel is provided with a plurality of cooling water flow holes distributed at intervals.
2. The intermediate drainable plate condenser as claimed in claim 1, wherein: the middle liquid discharge pipe vertically penetrates through the bottom of each V-shaped gas-liquid separation cavity, and a liquid discharge port is arranged at the section corresponding to each V-shaped gas-liquid separation cavity.
3. The intermediate drainable plate condenser as claimed in claim 1, wherein: and a V-shaped groove is formed in the middle of the B-shaped heat exchange plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010242520.9A CN111457753B (en) | 2020-03-31 | 2020-03-31 | Plate condenser capable of discharging liquid in middle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010242520.9A CN111457753B (en) | 2020-03-31 | 2020-03-31 | Plate condenser capable of discharging liquid in middle |
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| CN111457753A CN111457753A (en) | 2020-07-28 |
| CN111457753B true CN111457753B (en) | 2021-11-09 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114322596B (en) * | 2022-01-14 | 2023-02-17 | 北京交通大学 | Microchannel heat exchange plate and modular plate type microchannel condenser for automatically distributing liquid |
| CN114659379A (en) * | 2022-03-31 | 2022-06-24 | 西安热工研究院有限公司 | Heat transfer plate for enhancing heat and mass transfer capacity of regenerative condensation heat exchanger |
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| CN1275710A (en) * | 1999-05-31 | 2000-12-06 | 上原春男 | Condenser |
| WO2002006733A1 (en) * | 2000-07-10 | 2002-01-24 | Otkrytoe Aktsionernoe Obschestvo 'stroitransgaz' | Device for hot water heating and/or hot water supply |
| CN1656352A (en) * | 2002-05-29 | 2005-08-17 | 阿尔法拉瓦尔股份有限公司 | Plate heat exchanger device and a heat exchanger plate |
| CN101089536A (en) * | 2006-06-12 | 2007-12-19 | 株式会社聚源 | Condenser |
| CN101158558A (en) * | 2007-07-24 | 2008-04-09 | 李建明 | Plate-fin heat exchanger |
| CN202660949U (en) * | 2012-04-10 | 2013-01-09 | 吉林省电力有限公司四平供电公司 | Volume plate-type heat exchanger |
| CN105066729A (en) * | 2015-08-27 | 2015-11-18 | 广东工业大学 | Plate-type condenser with liquid separation function |
| CN106643238A (en) * | 2016-11-17 | 2017-05-10 | 广东工业大学 | Multistage liquid-separation plate-type condenser |
| CN109442806A (en) * | 2018-09-03 | 2019-03-08 | 广东工业大学 | A kind of liquid separation phase transformation plate heat exchanger and its application |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205784755U (en) * | 2016-06-27 | 2016-12-07 | 青岛瑞普特换热装备制造有限公司 | A kind of lamella heat exchanger |
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2020
- 2020-03-31 CN CN202010242520.9A patent/CN111457753B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1275710A (en) * | 1999-05-31 | 2000-12-06 | 上原春男 | Condenser |
| WO2002006733A1 (en) * | 2000-07-10 | 2002-01-24 | Otkrytoe Aktsionernoe Obschestvo 'stroitransgaz' | Device for hot water heating and/or hot water supply |
| CN1656352A (en) * | 2002-05-29 | 2005-08-17 | 阿尔法拉瓦尔股份有限公司 | Plate heat exchanger device and a heat exchanger plate |
| CN101089536A (en) * | 2006-06-12 | 2007-12-19 | 株式会社聚源 | Condenser |
| CN101158558A (en) * | 2007-07-24 | 2008-04-09 | 李建明 | Plate-fin heat exchanger |
| CN202660949U (en) * | 2012-04-10 | 2013-01-09 | 吉林省电力有限公司四平供电公司 | Volume plate-type heat exchanger |
| CN105066729A (en) * | 2015-08-27 | 2015-11-18 | 广东工业大学 | Plate-type condenser with liquid separation function |
| CN106643238A (en) * | 2016-11-17 | 2017-05-10 | 广东工业大学 | Multistage liquid-separation plate-type condenser |
| CN109442806A (en) * | 2018-09-03 | 2019-03-08 | 广东工业大学 | A kind of liquid separation phase transformation plate heat exchanger and its application |
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| CN111457753A (en) | 2020-07-28 |
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