CN113639579A - Cooling water recovery system applied to natural ventilation cooling - Google Patents
Cooling water recovery system applied to natural ventilation cooling Download PDFInfo
- Publication number
- CN113639579A CN113639579A CN202111094176.4A CN202111094176A CN113639579A CN 113639579 A CN113639579 A CN 113639579A CN 202111094176 A CN202111094176 A CN 202111094176A CN 113639579 A CN113639579 A CN 113639579A
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- Prior art keywords
- cooling
- water
- grid
- recovery system
- electrified grid
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- 238000001816 cooling Methods 0.000 title claims abstract description 46
- 238000011084 recovery Methods 0.000 title claims abstract description 28
- 239000000498 cooling water Substances 0.000 title claims abstract description 20
- 238000009423 ventilation Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 72
- 230000000694 effects Effects 0.000 abstract description 7
- 230000005484 gravity Effects 0.000 abstract description 5
- 230000000630 rising effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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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
- F28F25/00—Component parts of trickle coolers
- F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
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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
- F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
- F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
- F28F25/04—Distributing or accumulator troughs
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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
A cooling water recovery system applied to natural ventilation cooling comprises a rechargeable battery, an upper layer electrified grid and a lower layer electrified grid, wherein the upper layer electrified grid and the lower layer electrified grid are arranged above a water layer in a cooling tower; the upper charged grid is connected with the positive pole of the rechargeable battery, and the lower charged grid is connected with the negative pole of the rechargeable battery. When the steam evaporated from the cooling tower passes through the lower charged grid, a part of the larger droplets will adhere to the lower charged grid and fall back to the tower pool of the cooling tower under the action of gravity, and the other part of the droplets still having the larger buoyancy force will have negative charges and continue to rise. When the rising steam meets the upper electrified grid, the upper electrified grid is negatively charged, so that small droplets with negative charges can be adsorbed, the droplets are attached to the upper electrified grid and finally drop, and the effect of cooling water recovery is achieved in a circulating water cooling system.
Description
Technical Field
The invention belongs to the field of cooling towers, and relates to a cooling water recovery system applied to natural ventilation cooling.
Background
The natural draft cooling tower is an important cooling device and is widely applied to the industrial fields of petroleum, chemical industry, electric power and the like. The natural ventilation cooling tower carries out ventilation cooling by utilizing the air convection effect formed by natural air density difference inside and outside the tower or natural wind power, and cooled water vapor is taken out of the cooling tower under the action of natural lifting force and is discharged into the atmosphere. The water lost by the evaporative heat dissipation in the cooling process is an important component of the water loss of the cooling tower, and the water consumption is huge. The loss of the evaporated water not only causes great economic loss to the thermal power plant, but also causes visual pollution because the loss of the evaporated water forms 'white smoke' on the top of the tower. Therefore, it is important to reduce the loss of the evaporated water of the cooling tower.
Disclosure of Invention
In order to overcome the defects, the invention aims to provide a cooling water recovery system applied to natural ventilation cooling, which can recover cooling water from a natural ventilation cooling tower to achieve the effects of energy conservation and emission reduction on one hand, and can reduce white smoke plume emitted by the cooling tower to the outside to achieve the effect of reducing visual pollution on the other hand.
In order to achieve the purpose, the invention adopts the following technical scheme:
a cooling water recovery system applied to natural ventilation cooling comprises a rechargeable battery, an upper layer electrified grid and a lower layer electrified grid, wherein the upper layer electrified grid and the lower layer electrified grid are arranged above a water layer in a cooling tower; the upper charged grid is connected with the positive pole of the rechargeable battery, and the lower charged grid is connected with the negative pole of the rechargeable battery.
A further improvement of the invention is that the grid and the grid are directly at a distance of 5-8 meters.
The invention is further improved in that the upper charged grid and the lower charged grid are both made of 18-mesh wire mesh.
A further improvement of the invention is that the water collector is of a circular bowl shape.
The invention is further improved in that the water collector is connected with a recovery water tank.
The invention is further improved in that the bottom of the water collector is provided with a drain pipe, and the water delivery pipe is connected with the recovery water tank.
The invention has the further improvement that a first water collector is arranged at the center below the upper-layer electrified grid, the first water collector is positioned at the center of the cooling tower, and a plurality of circles of water collectors are uniformly arranged from inside to outside in the circumferential direction by taking the first water collector as the center; each ring is provided with a plurality of water collectors.
The invention is further improved in that the first circle has a circular arc radius R1Radius of the water collector arranged is r1Sequentially recurs, and the radius of the arc of the n-th circle is RnRadius of the water collector arranged is rn；
Compared with the prior art, the invention has the following beneficial effects: the method is characterized in that a compact upper-layer electrified grid and a compact lower-layer electrified grid are arranged above a water layer of the natural ventilation cooling tower, and the upper-layer electrified grid and the lower-layer electrified grid are respectively charged with positive charges and negative charges through a rechargeable battery. When the steam evaporated from the cooling tower passes through the lower charged grid, a part of the larger droplets will adhere to the lower charged grid and fall back to the tower pool of the cooling tower under the action of gravity, and the other part of the droplets still having the larger buoyancy force will have negative charges and continue to rise. When the rising steam meets the upper charged grid, the upper charged grid is negatively charged, so that the droplets with negative charges are adsorbed and attached to the upper charged grid. And finally, the water drops slowly under the action of gravity, and a part of the water drops into a water collector arranged between the upper-layer electrified grid and the lower-layer electrified grid. The water collected in the sump is finally collected in a recovery tank. The remaining liquid drops which do not fall into the water collector will eventually fall into the tower sump of the cooling tower. These droplets dropped to the tower sump are not returned to the recovery water tank, but still have the same effect of recovering the cooling water in the circulating water cooling system.
Drawings
FIG. 1 is a schematic view of a cooling water recovery system;
fig. 2 is a schematic view of a water collector arrangement.
Fig. 3 is a schematic view of a water collector structure.
Wherein 1 is an upper charged grid; 2, a lower layer electrified grid; 3 is a water collector; 4 is a recovery water tank; 5 is a rechargeable battery; 6 is a drain pipe.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
As shown in fig. 1, 2 and 3, the present invention provides a cooling water recovery system for natural ventilation cooling, which includes an upper electrified grid 1 and a lower electrified grid 2 disposed above a water layer in a cooling tower, and a water collector 3 disposed between the upper electrified grid 1 and the lower electrified grid 2. The direct distance between the grid 1 and the grid 2 is 5-8 meters, and the specific distance can be adjusted by combining with the actual situation of the site. The water collector 3 is connected with a recovery water tank 4.
The upper layer electrified grid 1 and the lower layer electrified grid 2 are both made of 18-mesh wire mesh. The upper charged grid 1 is connected with the positive electrode of the rechargeable battery 5, and the lower charged grid 2 is connected with the negative electrode of the rechargeable battery 5, so that the upper charged grid 1 is positively charged, and the lower charged grid 2 is negatively charged. After the circulating water of the cooling tower is sprayed on the water spraying layer, evaporated steam carries a large amount of liquid drops to rise. After the droplets pass through the lower charged grid 2, a part of the larger droplets will adhere to the grid of the lower charged grid 2 and fall back to the tower pool of the cooling tower by gravity, and another part of the droplets still having larger buoyancy will be negatively charged and will continue to rise. After the droplets that continue to rise pass through the lower charged grid 2, those negatively charged droplets will adhere to the upper charged grid 1 due to the attraction of the charges, and will fall most heavily due to gravity. The dropped droplets are partially collected by the collector 3 and finally returned to the collection tank 4. Another portion eventually drips down to the sump of the cooling tower. These droplets dropped to the tower sump are not returned to the recovery water tank 4, but still have the same effect of recovering the cooling water in the circulating water cooling system.
In order to increase the recovery effect of the sump 3, the following arrangement method is adopted:
step one, each water collector is in a circular bowl shape as shown in figure 3, a drain pipe 6 is arranged at the bottom of the water collector 3, and the drain pipe 6 is connected with a recovery water tank 4.
Step two, arranging a first water collector in the center below the upper-layer electrified grid 1, wherein the radius of the first water collector is R0. The water collector 3 is the largest of all water collectors.
And step three, the rest water collectors are sequentially unfolded and arranged in circles from the center of the cooling tower to the periphery on the same horizontal plane according to the equal section circle as shown in figure 2. Each ring is provided with a plurality of water collectors. A first circle of water collectors is arranged near the center of the cooling tower, and the radius of the circular arc of the first circle is R1The radius of the water collector is arrangedr1Sequentially recurs, and the radius of the arc of the n-th circle is RnRadius of the water collector arranged is rn。RnAnd rnRespectively representing the radius of an arrangement circular arc of a certain circle and the radius of the water collector. And R is the radius of the upper electrified grid 1.
And step four, uniformly arranging 12 water collectors in each circle, wherein the central angle corresponding to two adjacent water collectors is 30 degrees.
Step five, according to the requirement of the uniform cross-section circle,
the unit m is shown in FIG. 1.
Step six, according to the requirement of the uniform cross-section circle,
rn＜R0，R0is the first collector radius in m, as shown in detail in fig. 2.
And step seven, determining the number of arranged turns n according to the principle that Rn ≦ R ×.
Claims (8)
1. A cooling water recovery system applied to natural ventilation cooling is characterized by comprising a rechargeable battery (5), an upper layer electrified grid (1) and a lower layer electrified grid (2) which are arranged above a water layer in a cooling tower, wherein a plurality of water collectors (3) are arranged between the upper layer electrified grid (1) and the lower layer electrified grid (2); the upper layer electrified grid (1) is connected with the positive pole of the rechargeable battery (5), and the lower layer electrified grid (2) is connected with the negative pole of the rechargeable battery (5).
2. A cooling water recovery system for natural draft cooling applications as claimed in claim 1 wherein the grid (1) and grid (2) are directly separated by a distance of 5-8 meters.
3. A cooling water recovery system for natural draft cooling according to claim 1 wherein the upper charged mesh (1) and the lower charged mesh (2) are made of 18 mesh wire.
4. A cooling water recovery system for natural draft cooling applications as claimed in claim 1 wherein said water trap is circular bowl shaped.
5. A cooling water recovery system for natural draft cooling applications as claimed in claim 1 wherein a recovery tank (4) is connected to the water collector (3).
6. A cooling water recovery system for natural draft cooling according to claim 5 wherein the bottom of the water collector (3) is provided with a drain pipe and the water pipe is connected to the recovery water tank (4).
7. The cooling water recovery system applied to natural draft cooling of claim 1, wherein the first water collector is arranged at the center below the upper layer electrified grid (1), the first water collector is positioned at the center of the cooling tower, a plurality of circles of water collectors are uniformly arranged from inside to outside in the circumferential direction by taking the first water collector as the center; each ring is provided with a plurality of water collectors.
8. The cooling water recovery system for natural draft cooling of claim 7, wherein the radius of the arc of the first ring is R1Radius of the water collector arranged is r1Sequentially recurs, and the radius of the arc of the n-th circle is RnRadius of the water collector arranged is rn；
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111094176.4A CN113639579A (en) | 2021-09-17 | 2021-09-17 | Cooling water recovery system applied to natural ventilation cooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111094176.4A CN113639579A (en) | 2021-09-17 | 2021-09-17 | Cooling water recovery system applied to natural ventilation cooling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113639579A true CN113639579A (en) | 2021-11-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111094176.4A Pending CN113639579A (en) | 2021-09-17 | 2021-09-17 | Cooling water recovery system applied to natural ventilation cooling |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4249391A (en) * | 1979-09-19 | 1981-02-10 | Thomas Mackey | Cooling tower vapor recovery unit |
| CN103453785A (en) * | 2013-09-12 | 2013-12-18 | 孟金来 | Runoff type electrostatic water collection device and cooling tower with same |
| CN107478071A (en) * | 2017-10-08 | 2017-12-15 | 江苏丰泰节能环保科技有限公司 | A kind of cooling tower condensation fog-dissipation collecting system |
| CN207556308U (en) * | 2017-11-20 | 2018-06-29 | 中国五环工程有限公司 | Umbrella shape cooling tower water collector |
| CN109237962A (en) * | 2018-10-31 | 2019-01-18 | 浙江海洋大学 | A kind of cooling tower evapotranspires water condensation recyclable device and its condensate structure |
-
2021
- 2021-09-17 CN CN202111094176.4A patent/CN113639579A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4249391A (en) * | 1979-09-19 | 1981-02-10 | Thomas Mackey | Cooling tower vapor recovery unit |
| CN103453785A (en) * | 2013-09-12 | 2013-12-18 | 孟金来 | Runoff type electrostatic water collection device and cooling tower with same |
| CN107478071A (en) * | 2017-10-08 | 2017-12-15 | 江苏丰泰节能环保科技有限公司 | A kind of cooling tower condensation fog-dissipation collecting system |
| CN207556308U (en) * | 2017-11-20 | 2018-06-29 | 中国五环工程有限公司 | Umbrella shape cooling tower water collector |
| CN109237962A (en) * | 2018-10-31 | 2019-01-18 | 浙江海洋大学 | A kind of cooling tower evapotranspires water condensation recyclable device and its condensate structure |
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Application publication date: 20211112 |