CN110617717A - Concurrent flow type evaporative condenser - Google Patents
Concurrent flow type evaporative condenser Download PDFInfo
- Publication number
- CN110617717A CN110617717A CN201911014608.9A CN201911014608A CN110617717A CN 110617717 A CN110617717 A CN 110617717A CN 201911014608 A CN201911014608 A CN 201911014608A CN 110617717 A CN110617717 A CN 110617717A
- Authority
- CN
- China
- Prior art keywords
- air
- evaporative condenser
- water
- heat exchange
- cooling water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000000498 cooling water Substances 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000005507 spraying Methods 0.000 claims abstract description 9
- 239000007921 spray Substances 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 4
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/02—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention belongs to the technical field of heat exchange equipment, and provides a concurrent flow type evaporative condenser. The concurrent evaporative condenser comprises an air supply device, an air outlet, a water pump, a water collecting area, a demister, a heat exchanger, a spraying device and a shell; the air and the cooling water in the concurrent flow type evaporative condenser flow in the same direction, so that the flow resistance of the air and the cooling water is reduced, and the overall heat exchange efficiency of the heat exchanger is improved; and the air supply device replaces the traditional draught fan, so that the air containing liquid drops is prevented from directly contacting with the draught fan, the service life of the draught fan is prolonged, and the cooling water loss caused by the liquid drops carried by the gas is reduced. The concurrent evaporative condenser has the advantages of water saving, energy saving, compact structure, low cost and the like of the traditional evaporative condenser, and simultaneously has the advantages of reducing the loss of cooling water, reducing the flow resistance of a heat exchange medium, prolonging the service life of a fan and the like.
Description
Technical Field
The invention belongs to the technical field of heat exchange equipment, and particularly relates to a concurrent flow type evaporative condenser.
Background
Currently, in industrial applications, condensers are mainly classified into three types, namely: air-cooled, water-cooled, and evaporative. The evaporative condenser is essentially an air-cooled condenser and a cooling tower structure integrated device, and is widely applied to occasions of enhancing heat exchange and improving the performance of a cooling system.
The evaporative condenser simplifies a cooling water circulation system of the water-cooled condenser, the high air flow speed required by the air-cooled condenser can be obviously reduced, and the water-saving and energy-saving effects are obvious. The evaporative condenser has higher heat transfer coefficient, needs smaller heat exchange area under the condition of the same heat exchange quantity, saves more materials and occupied area, can carry out the heat exchange process under the condition of smaller temperature difference, and reduces the generation of dirt on the wall of the heat exchange pipe, so the evaporative condenser is widely applied to the industries of electric power, seawater desalination, refrigeration and the like.
At present, the existing evaporative condenser generally adopts an induced draft type, namely a counter-flow evaporative condenser with the wind direction and the spray water flowing in the reverse direction. The countercurrent evaporative condenser has good heat and mass transfer performance, but the humidity of air is increased after the air and water carry out heat and mass exchange, and the air can corrode a fan of the induced air evaporative condenser to a certain extent when flowing through an air outlet; meanwhile, the wet air can take away a part of water vapor, so that water loss is caused, and the water consumption of the system is increased; in addition, due to the backflow of air and water, the flow resistance of cooling water and air is obviously increased, and the total energy consumption of the system is increased.
Disclosure of Invention
The invention provides a downstream type evaporative condenser, which aims to solve the problems of system water loss, high flow resistance and damage to the service life of a fan by wet air of the existing induced draft type evaporative condenser.
The technical scheme of the invention is as follows:
a concurrent evaporative condenser comprises an air supply device 2, an air outlet 5, a water pump 6, a water collecting area 7, a demister 8, a heat exchanger 9, a spraying device 10 and a shell 11;
an air inlet is formed above the shell 11, and the air supply device 2 is arranged at the air inlet and used for bringing air into the evaporative condenser; a spraying device 10 is arranged below the air inlet, a heat exchanger 9 is arranged below the spraying device 10, the heat exchanger exchanges heat with air and spray water flowing downwards, and the spray water which completes heat exchange flows into a water collecting area 7 at the bottom of the evaporative condenser under the action of gravity; an air outlet 5 is formed in the shell 11, the shell 11 is positioned below the heat exchanger 9 and above the water collecting area 7, a demister 8 is mounted on the air outlet 5, the demister 8 separates vapor and liquid in the wet air, the gas is discharged out of the system through the air outlet 5, and the liquid enters the water collecting area 7 downwards; the bottom in the shell 11 is a water collecting area 7, the water collecting area 7 is communicated with an external water pump 6, and cooling water in the water collecting area 7 is discharged out of the evaporative condenser by the water pump 6.
The heat exchanger 9 is a tubular heat exchanger.
The air supply device 2 is a blower.
The invention has the beneficial effects that: an induced draft fan is replaced by an air blower (or other air supply equipment), so that air and cooling water flow in the same direction, and the problem that in an induced draft type evaporative condenser, partial falling spray water is brought out of the device upwards due to rising of air flow, and the water loss of a system is caused is solved. Moreover, in traditional induced draft type evaporative condenser, air current is after accomplishing the heat transfer, and humidity can increase to some extent, when the great air current of humidity left the system through the fan, can cause great corruption and wearing and tearing to the fan wheel. According to the concurrent evaporative condenser, an air flow mode from top to bottom is adopted, wet air after heat exchange does not leave the condenser through the fan any more, but flows through the demister, and leaves the system through the air outlet below the heat exchanger, so that the corrosion of the wet air to the fan is effectively avoided, and the service life and the safety coefficient of the fan are greatly improved. Meanwhile, in the invention, the flow direction of the spray water is the same as that of the air, so the flow resistance is smaller, and the flow speed of the liquid film on the coil pipe of the heat exchanger is higher, thereby further strengthening the heat exchange effect of the evaporative condenser.
Drawings
Fig. 1 is a schematic view of a working flow of a forward flow type evaporative condenser according to the present invention.
In the figure: 1 an air inlet; 2, a blower; 3, a steam inlet; 4 a condensate outlet; 5, an air outlet; 6, a water pump; 7 a water collection area; 8, a demister; 9 heat exchanger; 10 a spraying device; 11, a shell.
Detailed Description
The following further describes a specific embodiment of the present invention with reference to the drawings and technical solutions.
Examples
1. The air supply system comprises: air is sent into from the following current formula evaporative condenser top by the air-blower, flows through the heat transfer region after, through demister 8 eduction gear. The air supply volume and the air speed are determined according to the actual requirements of the concurrent evaporative condenser.
2. Cooling water system: the cooling water is distributed to the surface of the heat exchange tube 9 (heat exchange area) by the spray device 10 to form a liquid film, flows from top to bottom under the action of gravity, and is discharged from the water collection area 7 at the bottom of the concurrent evaporative condenser after flowing through the heat exchange area.
3. A heat exchange system: the heat exchange system is divided into three parts, wherein the first part is the heat exchange between a heat exchange tube 9 (heat exchange surface) and cooling water, the cooling water exchanges heat with a heat source in the tube after forming a liquid film on the surface of the heat exchange tube 9 (heat exchange surface), part of the cooling water is evaporated into steam, and the rest of the cooling water which is not evaporated enters a water collection area 7 of the device; the second part is heat exchange between cooling water and air, the cooling water is heated by a heat exchange tube 9 (heat exchange surface) and then continuously exchanges heat with air flowing in the same direction, and most of heat is taken out of the downstream evaporative condenser by the air; the third part is the heat exchange between steam and air, the steam of the cooling water heated and evaporated is carried to the air outlet 5 by the air, during the heat exchange with the air, the condensed liquid drops on the water collecting area 7 at the bottom of the concurrent evaporative condenser, and the uncondensed steam is discharged out of the device through the demister 8.
4. The working process is as follows: air enters the downstream evaporative condenser through the air blower, exchanges heat with cooling water and cooling water vapor in a heat exchange area respectively, reduces the temperature of the cooling water, condenses part of the cooling water vapor simultaneously, and carries the tiny liquid drops of the cooling water and the cooling water vapor to flow through the demister 8 after the air is heated to enter the air outlet 5 to be discharged out of the downstream evaporative condenser. The airborne droplets are separated in the demister 8 into the water collection area 7. Cooling water is distributed on the surface of a heat exchange tube 9 (heat exchange surface) by a spraying device 10 to form a liquid film to exchange heat with a heat source in the heat exchange tube 9, the cooling water is heated and part of steam is evaporated, the heated cooling liquid flows from top to bottom under the action of gravity and exchanges heat with air to reduce the temperature, and the cooling liquid flows through a heat exchange area and enters a water collection area 7 to be discharged out of a concurrent evaporative condenser; the evaporated cooling water vapor flows from top to bottom along with the air and exchanges heat with the air at the same time, the condensed liquid enters the water collecting area 7, and the uncondensed vapor flows through the demister 8 and then is discharged out of the concurrent evaporative condenser.
Claims (3)
1. The forward-flow type evaporative condenser is characterized by comprising an air supply device (2), an air outlet (5), a water pump (6), a water collecting area (7), a demister (8), a heat exchanger (9), a spraying device (10) and a shell (11);
an air inlet is formed above the shell (11), and an air supply device (2) is arranged at the air inlet and used for bringing air into the evaporative condenser; a spraying device (10) is arranged below the air inlet, a heat exchanger (9) is arranged below the spraying device (10) and exchanges heat with air and spray water flowing downwards, and the spray water which completes heat exchange flows into a water collecting area (7) at the bottom of the evaporative condenser under the action of gravity; an air outlet (5) is formed in the shell (11), the shell (11) is positioned below the heat exchanger (9) and above the water collecting area (7), a demister (8) is installed on the air outlet (5), the demister (8) separates vapor and liquid in the wet air, the gas is discharged out of the system from the air outlet (5), and the liquid enters the water collecting area (7) downwards; the bottom in the shell (11) is a water collecting area (7), the water collecting area (7) is communicated with an external water pump (6), and cooling water in the water collecting area (7) is discharged out of the evaporative condenser through the water pump (6).
2. Concurrent evaporative condenser according to claim 1, characterized by that the heat exchanger (9) is a tubular heat exchanger.
3. Concurrent evaporative condenser according to claim 1 or 2, characterized by that the air supply means (2) is a blower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911014608.9A CN110617717A (en) | 2019-10-24 | 2019-10-24 | Concurrent flow type evaporative condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911014608.9A CN110617717A (en) | 2019-10-24 | 2019-10-24 | Concurrent flow type evaporative condenser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110617717A true CN110617717A (en) | 2019-12-27 |
Family
ID=68926403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911014608.9A Pending CN110617717A (en) | 2019-10-24 | 2019-10-24 | Concurrent flow type evaporative condenser |
Country Status (1)
| Country | Link |
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| CN (1) | CN110617717A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983452A (en) * | 2021-09-18 | 2022-01-28 | 杭州中能汽轮动力有限公司 | Parallel peak cooling air-cooled steam turbine generator unit and condensing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203928785U (en) * | 2014-07-01 | 2014-11-05 | 西安协力动力科技有限公司 | A kind of following current evaporative condenser |
| CN104456786A (en) * | 2014-11-11 | 2015-03-25 | 陕西优斯达环境科技有限公司 | Evaporation-condensation type integrated water chilling unit |
| CN204388641U (en) * | 2014-11-27 | 2015-06-10 | 山东盛宝传热科技有限公司 | A kind of counter flow evaporative condenser |
| KR20160130930A (en) * | 2015-05-05 | 2016-11-15 | 임지훈 | The cooling tower using the difference of steam pressure |
| CN210773522U (en) * | 2019-10-24 | 2020-06-16 | 大连理工大学 | Concurrent flow type evaporative condenser |
-
2019
- 2019-10-24 CN CN201911014608.9A patent/CN110617717A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203928785U (en) * | 2014-07-01 | 2014-11-05 | 西安协力动力科技有限公司 | A kind of following current evaporative condenser |
| CN104456786A (en) * | 2014-11-11 | 2015-03-25 | 陕西优斯达环境科技有限公司 | Evaporation-condensation type integrated water chilling unit |
| CN204388641U (en) * | 2014-11-27 | 2015-06-10 | 山东盛宝传热科技有限公司 | A kind of counter flow evaporative condenser |
| KR20160130930A (en) * | 2015-05-05 | 2016-11-15 | 임지훈 | The cooling tower using the difference of steam pressure |
| CN210773522U (en) * | 2019-10-24 | 2020-06-16 | 大连理工大学 | Concurrent flow type evaporative condenser |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983452A (en) * | 2021-09-18 | 2022-01-28 | 杭州中能汽轮动力有限公司 | Parallel peak cooling air-cooled steam turbine generator unit and condensing method |
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