CN111207603A - Dry-wet separation multi-air-inlet composite closed cooling tower and operation adjusting method thereof - Google Patents
Dry-wet separation multi-air-inlet composite closed cooling tower and operation adjusting method thereof Download PDFInfo
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- CN111207603A CN111207603A CN202010170566.4A CN202010170566A CN111207603A CN 111207603 A CN111207603 A CN 111207603A CN 202010170566 A CN202010170566 A CN 202010170566A CN 111207603 A CN111207603 A CN 111207603A
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- 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
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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
- F28D7/08—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 being otherwise bent, e.g. in a serpentine or zig-zag
- F28D7/082—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 being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
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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
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- 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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- 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
- F28F25/06—Spray nozzles or spray pipes
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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
- F28F25/08—Splashing boards or grids, e.g. for converting liquid sprays into liquid films; Elements or beds for increasing the area of the contact surface
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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
- F28F25/10—Component parts of trickle coolers for feeding gas or vapour
- F28F25/12—Ducts; Guide vanes, e.g. for carrying currents to distinct zones
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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
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/003—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus specially adapted for cooling towers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A dry-wet separation multi-air inlet composite closed cooling tower and an operation adjusting method thereof belong to the technical field of circulating water cooling, a tower body is divided into a left chamber and a right chamber by a partition plate placed in the cavity of the tower body, an air valve and a finned tube heat exchanger are arranged on the left chamber from top to bottom, a water absorber, a spray exhaust pipe, a light tube heat exchanger, filler and a water collecting tank are arranged on the right chamber from top to bottom, a first fan and a second fan are respectively arranged on the tops of the left chamber and the right chamber, and a first air inlet, a second air inlet and a third air inlet are respectively arranged on the left side wall surface of the left chamber, the. The invention separates the dry air cooling from the evaporative cooling, and can realize the flexible switching and combination of the dry air cooling and the evaporative cooling under various air inlet working conditions by controlling the opening states of different air inlets and different fans according to the change of the outdoor environment temperature and the cooling heat dissipation load, thereby achieving the effect of saving energy and water to the maximum extent.
Description
Technical Field
The invention belongs to the technical field of circulating water cooling, relates to a closed cooling tower and an operation adjusting method, and particularly relates to a dry-wet separation multi-air-inlet composite closed cooling tower which is provided with dry air cooling and evaporative cooling in a separated mode, can flexibly adjust air inlet states and is combined with dry air cooling and evaporative cooling, and an operation adjusting method of the dry-wet separation multi-air-inlet composite closed cooling tower.
Background
The closed cooling tower is used as a circulating water cooling heat dissipation device, and is widely popularized in various industries due to the advantages of energy conservation, water conservation, difficulty in polluting water quality and the like. The existing closed cooling tower is generally characterized in that water flow is vertically sprayed downwards from the upper part of a tower body, outdoor natural air is vertically upwards (a counter-flow tower) or horizontally (a cross-flow tower) sweepers outwards under the action of a fan to embed a heat exchange tube bundle and a water spraying filler in the tower body, so that heat and humidity exchange between the outdoor natural air and a cooled medium in the heat exchange tube bundle is realized, and the purpose of cooling the cooled circulating medium in the tube is achieved.
However, the inlet air of the existing closed cooling tower is generally outdoor natural air, and when the outdoor environment temperature changes, the inlet air state of the closed cooling tower also changes correspondingly, so that the heat dissipation capacity of the cooling tower is affected, and particularly in high-temperature and high-humidity seasons, the cooling heat dissipation capacity of the cooling tower is greatly reduced; in addition, in order to further save energy and water, a closed cooling tower adopting dry-wet combined dual cooling is also adopted, but the existing tower is generally provided with a dry coil and a wet coil which are arranged in the same area from top to bottom, so that the corresponding adjustment is not convenient to be carried out according to the change of outdoor working conditions, and even if the tower runs under the dry working conditions, outdoor air can also pass through a filling area and a wet coil area, thereby increasing the air flow resistance and increasing the energy consumption of a fan. Therefore, there is a need to provide a dry-wet separation multi-air intake composite closed cooling tower which can flexibly adjust the air intake state according to the outdoor environment temperature to reduce the outdoor climate influence and improve the cooling efficiency of the cooling tower, and can also arrange dry cooling and evaporative cooling in different areas.
Disclosure of Invention
The invention aims to overcome the defects that the air inlet state of the existing closed cooling tower is greatly influenced by the outdoor environment, the cooling capacity and the cooling heat exchange efficiency of the cooling tower are low, and a dry air-cooling and evaporative cooling coil is in the same area and cannot flexibly adjust the operation condition according to the cooling heat dissipation load, and the like.
The technical scheme of the invention is as follows: the utility model provides a dry-wet separation multi-air intake composite closed cooling tower which characterized in that: the closed cooling tower consists of a tower body, a first fan, a second fan, a partition plate, a water absorber, an air valve, a light pipe heat exchanger, a finned tube heat exchanger, filler, a first air inlet, a second air inlet, a third air inlet, a tunnel air inlet system and a water spraying system; the utility model discloses a water spray system, including the division board, the division board is arranged in the inner chamber of tower body to separate into left cavity and right cavity with the inner chamber, first fan, second fan are arranged in respectively the top of left side cavity and right cavity, top-down is equipped with blast gate and finned tube heat exchanger in the left side cavity, top-down is equipped with water absorber, spray calandria, fluorescent tube heat exchanger, packs and water catch bowl in the right side cavity, the left side wall and the bottom of left cavity are arranged respectively in to first air intake, second air intake, the right side wall of right cavity is arranged in to the third air intake, water spray system is connected by spray calandria, spray water pump, water catch bowl, ball-cock assembly and nozzle and is formed, the nozzle sets up between water absorber.
The cooling water pipe heat exchanger is characterized in that a first water inlet and a first water outlet are formed in the light pipe heat exchanger, a second water inlet and a second water outlet are formed in the finned tube heat exchanger, the first water inlet is connected with the second water inlet in parallel, the first water outlet is connected with the second water outlet in parallel, and the cooling water can independently enter the light pipe heat exchanger or the finned tube heat exchanger and then flow out of the same pipeline or simultaneously enter the light pipe heat exchanger and the finned tube heat exchanger and then flow out of the same pipeline through adjustment of the installation valve.
The partition plate has the functions of air inlet rectification, water retaining and closing, and when the fan and the water spraying system are started and the second air inlet is closed, the partition plate realizes the functions of air inlet rectification and water retaining; the rest of the chambers realize the closing function to separate the left chamber from the right chamber.
The first fan and the second fan are both variable-frequency speed-regulating fans, and corresponding regulation is carried out according to the size of cooling heat dissipation load and the operation mode so as to change the air volume or the air pressure; the spray water pump is a variable frequency water pump, and the water volume is changed according to the heat dissipation load.
The tunnel air inlet system consists of an air inlet cap, an air inlet filter screen and a buried air inlet pipeline; the air inlet filter screen is arranged at the air inlet of the buried air inlet pipeline below the hood.
The buried air inlet pipeline is in a straight pipeline or a spiral pipeline according to the size of a heat dissipation load and the area of an available buried pipeline, the cross section size of the buried air inlet pipeline is determined according to the design air volume and the air inlet speed requirement, the length of the buried air inlet pipeline is determined according to the born design heat dissipation capacity, and the buried depth of the buried air inlet pipeline is 4-5 m.
An operation adjusting method of a dry-wet separation multi-air-inlet composite closed cooling tower comprises the following operation adjusting modes:
(1) natural air-drying type air cooling mode: when the outdoor environment temperature is low and the cooling water heat dissipation load is small, the first fan is started, the air valve and the first air inlet are opened, the partition plate, the second air inlet and the third air inlet are closed, and the right chamber stops running; at the moment, cooling circulating water enters the finned tube heat exchanger from a second water inlet, is cooled by natural wind and then flows out from a second water outlet; outdoor air enters the left chamber from the first air inlet, exchanges heat with the finned tube heat exchanger and is discharged from the first fan;
(2) tunnel air-drying type air-cooling mode: when the outdoor environment temperature rises, the cooling water heat dissipation load is increased, and the independent natural air-drying type air cooling heat dissipation is insufficient, the first fan is started and subjected to frequency conversion adjustment to increase the air pressure, the air valve and the third air inlet are opened, the partition plate and the first air inlet are closed, and the right chamber stops running; at the moment, cooling circulating water enters the finned tube heat exchanger from a second water inlet, is cooled by tunnel air and then flows out from a second water outlet; outdoor air enters from an air inlet cap of the tunnel air system, enters the buried air inlet pipeline after being filtered by the air inlet filter screen, enters the left chamber from the third air inlet after exchanging heat with surrounding soil, and is discharged from the first fan after exchanging heat with the finned tube heat exchanger;
(3) natural wind evaporative cooling mode: when the outdoor environment temperature is high, the cooling heat dissipation capacity is high, and the tunnel air-drying type air-cooling heat dissipation is insufficient, the second fan is started, the spray water pump is started, the second air inlet is opened, and the first fan, the first air port, the third air port and the partition plate are closed; at the moment, cooling circulating water enters the light pipe heat exchanger from a first water inlet, is cooled by natural wind in an evaporative mode and then flows out from a first water outlet; outdoor air enters the right chamber from the second air inlet, exchanges heat with the filler through the light pipe heat exchanger, absorbs water through the water absorber and is discharged from the second fan; spraying circulating water enters the spraying discharge pipes from the water collecting tank and is sprayed out downwards from the nozzles under the action of a spraying water pump, and spraying water sequentially passes through the light pipe heat exchanger and the filler and then falls into the water collecting tank;
(4) tunnel air evaporative cooling mode: when the outdoor environment temperature is high, the cooling heat dissipation capacity is high, and the natural wind evaporation type cooling heat dissipation is insufficient, the second fan is started and frequency-variable regulated to increase the wind pressure, the spray water pump is started, the third air inlet and the partition plate are opened, and the first fan, the first air inlet, the second air inlet and the air valve are closed; at the moment, cooling circulating water enters the light pipe heat exchanger from a first water inlet, is cooled by the tunnel air in an evaporative mode and then flows out from a first water outlet; outdoor air enters from an air inlet cap of the tunnel air system, enters a buried air inlet pipeline after being filtered by an air inlet filter screen, enters a left cavity from a third air inlet after exchanging heat with surrounding soil, enters a right cavity from a partition plate under the action of negative pressure generated by a second fan, is discharged out of the tower body from the second fan after exchanging heat and moisture with a filler and a light pipe heat exchanger, absorbs water through a water absorber, and the circulating spray water flow path is the same as the natural wind evaporative cooling mode;
(5) the tunnel air-drying type air cooling and natural air evaporative cooling composite cooling mode comprises the following steps: when the outdoor environment temperature is high, the cooling heat dissipation capacity is high, and the tunnel air evaporative cooling heat dissipation can not meet the requirements, the first fan and the second fan are started, the second air inlet, the third air inlet and the air valve are opened, the partition plate and the first air inlet are closed, and the spray water pump is started; at the moment, cooling circulating water enters the light pipe heat exchanger and the finned tube heat exchanger from the first water inlet and the second water inlet respectively, and then flows out from the first water outlet and the second water outlet respectively after heat exchange; the air flow path in the left chamber is the same as the dry cooling mode of the tunnel air, the air flow path in the right chamber is the same as the evaporative cooling mode of the natural wind, and the spray circulating water flow path is the same as the evaporative cooling mode of the natural wind.
The invention has the beneficial effects that: the invention provides a dry-wet separation multi-air-inlet composite closed cooling tower and an operation adjusting method thereof, the cooling tower has a novel structure and a clear operation adjusting principle, overcomes the defects that the air inlet of the traditional closed cooling tower is only outdoor natural air, the heat dissipation capacity of the cooling tower is influenced, the cooling heat exchange efficiency is reduced, a dry coil pipe and a wet coil pipe are arranged in the same area, and the operation working condition cannot be flexibly adjusted according to the cooling heat dissipation load, so as to further save energy and water, and the tunnel air is used as the air inlet of the cooling tower, so that the air inlet temperature can be reduced, the cooling efficiency is improved, and the dry-wet separation multi-air-inlet composite closed cooling tower can be combined with other natural air inlets to realize flexible conversion and adjustment among different cooling modes, so as; the dry air cooling and the evaporative cooling are separately arranged, and the variable-frequency double fans and the water pump are adopted, so that the number of the fans can be started and the rotating speeds of the fans and the water pump can be adjusted according to specific outdoor environment changes, the air quantity and the spraying water quantity can be changed in real time, and the maximized energy conservation and water conservation can be realized.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
In the figure: the device comprises a tower body 1, a left chamber 1-1, a right chamber 1-2, a first fan 2-1, a second fan 2-2, a partition plate 3, a water absorber 4, a spray discharge pipe 5, an air valve 6, a spray water pump 7, a water collecting tank 8, a ball float valve (9), a nozzle 10, a light pipe heat exchanger 11, a first water inlet 11-1, a first water outlet 11-2, a finned tube heat exchanger 12, a second water inlet 12-1, a second water outlet 12-2, a filler 13, a first air inlet 14-1, a second air inlet 14-2, a third air inlet 14-3, a tunnel air inlet system 15, an air cap 15-1, an air inlet filter screen 15-2 and a buried air inlet pipeline 15-3.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
as shown in figure 1, the dry-wet separation multi-air-inlet composite closed cooling tower comprises a tower body 1, a first fan 2-1, a second fan 2-2, a partition plate 3, a water absorber 4, an air valve 6, a light pipe heat exchanger 11, a finned tube heat exchanger 12, packing 13, a first air inlet 14-1, a second air inlet 14-2, a third air inlet 14-3, a tunnel air inlet system 15 and a water spraying system; the partition plate 3 is arranged in the inner cavity of the tower body 1 and divides the inner cavity into a left cavity 1-1 and a right cavity 1-2, the first fan 2-1 and the second fan 2-2 are respectively arranged at the top of the left cavity 1-1 and the right cavity 1-2, the air valve 6 and the finned tube bundle heat exchanger 12 are arranged in the left cavity 1-1 from top to bottom, the water absorber 4, the spray calandria 5, the light tube heat exchanger 11, the filler 13 and the water collection tank 8 are arranged in the right cavity 1-2 from top to bottom, the first air inlet 14-1 and the second air inlet 14-2 are respectively arranged at the left side wall surface and the bottom of the left cavity 1-1, the third air inlet 14-3 is arranged at the right side wall surface of the right cavity 1-2, and the water spray system is formed by connecting the spray calandria 5, the spray water pump 7, the nozzle 10 is arranged between the water absorber 4 and the light pipe heat exchanger 11.
As shown in figure 1, a dry-wet separation multi-air inlet composite closed cooling tower is characterized in that a light pipe heat exchanger 11 is provided with a first water inlet 11-1 and a first water outlet 11-2, a finned tube heat exchanger 12 is provided with a second water inlet 12-1 and a second water outlet 12-2, the first water inlet 11-1 is connected with the second water inlet 12-1 in parallel, the first water outlet 11-2 is connected with the second water outlet 12-2 in parallel, and cooled water can independently enter the light pipe heat exchanger 11 or the finned tube heat exchanger 12 and then flow out of the same pipeline or simultaneously enter the light pipe heat exchanger 11 and the finned tube heat exchanger 12 and then flow out of the same pipeline through adjustment of an installation valve; the partition plate 3 has the functions of air inlet rectification, water retaining and closing, and when the fan 2-2 and the water spraying system are started and the second air inlet 14-2 is closed, the partition plate 3 realizes the functions of air inlet rectification and water retaining; the rest of the chambers realize the closing function to separate the left chamber 1-1 from the right chamber 1-2; the first fan 2-1 and the second fan 1-2 are both variable-frequency speed-regulating fans, and corresponding regulation is carried out according to the size of cooling heat dissipation load and the operation mode so as to change the air volume or the air pressure; the spray water pump 7 is a variable frequency water pump, and the water quantity is changed according to the heat dissipation load; the tunnel air inlet system 15 consists of an air inlet cap 15-1, an air inlet filter screen 15-2 and a buried air inlet pipeline 15-3; the air inlet filter screen 15-2 is arranged at an air inlet of a buried air inlet pipeline below the blast cap 15-1; the buried air inlet pipeline 15-3 is a straight pipeline or a spiral pipeline according to the size of a heat dissipation load and the area of an available buried pipeline, the cross section size of the buried air inlet pipeline 15-3 is determined according to the design air volume and the air inlet speed requirement, the length of the buried air inlet pipeline 15-3 is determined according to the born design heat dissipation capacity, and the buried depth of the buried air inlet pipeline 15-3 is 4-5 m.
As shown in fig. 1, an operation adjusting method of a dry-wet separation multi-air-intake composite closed cooling tower has the following operation adjusting modes:
(1) natural air-drying type air cooling mode: when the outdoor environment temperature is low and the cooling water heat dissipation load is small, starting a first fan 2-1, opening an air valve 6 and a first air inlet 14-1, closing a partition plate 3, a second air inlet 14-2 and a third air inlet 14-3, and stopping the operation of a right chamber 1-2; at the moment, cooling circulating water enters the finned tube bundle heat exchanger 12 from a second water inlet 12-1, is cooled by natural wind and radiates heat, and then flows out from a second water outlet 12-2; outdoor air enters the left chamber 1-1 from the first air inlet 14-1, exchanges heat with the finned tube heat exchanger 12 and is discharged from the first fan 2-1.
(2) Tunnel air-drying type air-cooling mode: when the outdoor environment temperature rises, the cooling water heat dissipation load is increased, and the independent natural air-drying type air cooling heat dissipation is insufficient, the first fan 2-1 is started and frequency-conversion adjustment is carried out to increase the air pressure, the air valve 6 and the third air inlet 14-3 are opened, the partition plate 3 and the first air inlet 14-1 are closed, and the right chamber 1-2 stops running; at the moment, cooling circulating water enters the finned tube heat exchanger 12 from a second water inlet 12-1, is cooled by tunnel air and then flows out from a second water outlet 12-2; outdoor air enters from an air inlet cap 15-1 of the underground duct system 15, enters a buried air inlet duct 15-3 after being filtered by an air inlet filter screen 15-2, enters the left chamber 1-1 from a third air inlet 14-3 after exchanging heat with surrounding soil, and is discharged from a first fan 2-1 after exchanging heat with a finned tube heat exchanger 12.
(3) Natural wind evaporative cooling mode: when the outdoor environment temperature is high, the cooling heat dissipation capacity is large, and the tunnel air-drying type air-cooling heat dissipation is insufficient, the second fan 2-2 is started, the spray water pump 7 is started, the second air inlet 14-2 is opened, and the first fan 2-1, the first air inlet 12-1, the third air inlet 12-3 and the partition plate 3 are closed; at the moment, cooling circulating water enters the light pipe heat exchanger 11 from the first water inlet 11-1, is cooled by natural wind evaporation and then flows out from the first water outlet 11-1; outdoor air enters the right chamber 1-2 from the second air inlet 14-2, exchanges heat with the filler 13 through the light pipe heat exchanger 11, absorbs water through the water absorber 4 and is discharged from the second fan 2-2; the spraying circulating water enters the spraying exhaust pipe 5 from the water collecting tank 8 and is sprayed out downwards from the nozzle 10 under the action of the spraying water pump 7, and the spraying water sequentially passes through the light pipe heat exchanger 11 and the filler 13 and then falls into the water collecting tank 8.
(4) Tunnel air evaporative cooling mode: when the outdoor environment temperature is high, the cooling heat dissipation capacity is large, and the natural wind evaporation type cooling heat dissipation is insufficient, the second fan 2-2 is started and frequency-conversion adjustment is carried out to increase the wind pressure, the spray water pump 7 is started, the third air inlet 14-3 and the partition plate 3 are opened, and the first fan 2-1, the first air inlet 14-1, the second air inlet 14-2 and the air valve 6 are closed; at the moment, cooling circulating water enters the light pipe heat exchanger 11 from the first water inlet 11-1, is cooled by the tunnel air in an evaporative mode and then flows out from the first water outlet 11-1; outdoor air enters from an air inlet cap 15-1 of a tunnel air system 15, enters a buried air inlet pipeline 15-3 after being filtered by an air inlet filter screen 15-2, enters a left chamber 1-1 from a third air inlet 14-3 after exchanging heat with surrounding soil, enters a right chamber 1-2 from a partition plate 3 under the action of negative pressure generated by a second fan 2-2, is subjected to heat and moisture exchange with a filler 13 and a light tube heat exchanger 11, is discharged out of the tower body from the second fan 2-2 after absorbing water through a water absorber 4, and the spraying circulating water flow path is the same as the natural air evaporative cooling mode.
(5) The tunnel air-drying type air cooling and natural air evaporative cooling composite cooling mode comprises the following steps: when the outdoor environment temperature is high, the cooling heat dissipation capacity is large, and the tunnel air evaporative cooling heat dissipation can not meet the requirements, the first fan 2-1 and the second fan 2-2 are started, the second air inlet 14-2, the third air inlet 14-3 and the air valve 6 are opened, the partition plate 3 and the first air inlet 14-1 are closed, and the spray water pump is started; at the moment, cooling circulating water enters the light pipe heat exchanger 11 and the finned tube heat exchanger 12 from the first water inlet 11-1 and the second water inlet 12-1 respectively, and then flows out from the first water outlet 11-2 and the second water outlet 12-2 respectively after heat exchange; the air flow path in the left chamber 1-1 is the same as the dry cooling mode of the underground wind, the air flow path in the right chamber 1-2 is the same as the evaporative cooling mode of the natural wind, and the spraying circulating water flow path is the same as the evaporative cooling mode of the natural wind.
Claims (7)
1. The utility model provides a dry-wet separation multi-air intake composite closed cooling tower which characterized in that: the closed cooling tower consists of a tower body (1), a first fan (2-1), a second fan (2-2), a partition plate (3), a water absorber (4), an air valve (6), a light pipe heat exchanger (11), a finned tube heat exchanger (12), filler (13), a first air inlet (14-1), a second air inlet (14-2), a third air inlet (14-3), a tunnel air inlet system (15) and a water spraying system; the tower is characterized in that the partition plate (3) is arranged in an inner cavity of the tower body (1) and divides the inner cavity into a left chamber (1-1) and a right chamber (1-2), the first fan (2-1) and the second fan (2-2) are respectively arranged at the tops of the left chamber (1-1) and the right chamber (1-2), an air valve (6) and a finned tube heat exchanger (12) are arranged in the left chamber (1-1) from top to bottom, a water absorber (4), a spray exhaust pipe (5), a light pipe heat exchanger (11), filler (13) and a water collecting tank (8) are arranged in the right chamber (1-2) from top to bottom, the first air inlet (14-1) and the second air inlet (14-2) are respectively arranged at the left side wall surface and the bottom of the left chamber (1-1), and the third air inlet (14-3) is arranged at the right side wall surface of the right chamber (1-, the water spraying system is formed by connecting a spraying calandria (5), a spraying water pump (7), a water collecting tank (8), a ball float valve (9) and a nozzle (10), and the nozzle (10) is arranged between the water absorber (4) and the light pipe heat exchanger (11).
2. The dry-wet separation multi-air-inlet composite closed cooling tower as claimed in claim 1, wherein: the cooling water pipe heat exchanger is characterized in that a first water inlet (11-1) and a first water outlet (11-2) are arranged on the light pipe heat exchanger (11), a second water inlet (12-1) and a second water outlet (12-2) are arranged on the finned tube heat exchanger (12), the first water inlet (11-1) is connected with the second water inlet (12-1) in parallel, the first water outlet (11-2) is connected with the second water outlet (12-2) in parallel, and the cooling water can independently enter the light pipe heat exchanger (11) or the finned tube heat exchanger (12) and then flow out of the same pipeline or simultaneously enter the light pipe heat exchanger (11) and the finned tube heat exchanger (12) and then flow out of the same pipeline through adjustment of an installation valve.
3. The dry-wet separation multi-air-inlet composite closed cooling tower as claimed in claim 1, wherein: the partition plate (3) has the functions of air inlet rectification, water retaining and closing, and when the fan (2-2) and the water spraying system are started and the second air inlet (14-2) is closed, the partition plate (3) realizes the functions of air inlet rectification and water retaining; the rest of the chambers realize the closing function to separate the left chamber (1-1) and the right chamber (1-2).
4. The dry-wet separation multi-air-inlet composite closed cooling tower as claimed in claim 1, wherein: the first fan (2-1) and the second fan (1-2) are both variable-frequency speed-regulating fans, and corresponding regulation is carried out according to the size of cooling heat dissipation load and the operation mode so as to change the air volume or the air pressure; the spray water pump (7) is a variable frequency water pump, and the water volume is changed according to the heat dissipation load.
5. The dry-wet separation multi-air-inlet composite closed cooling tower as claimed in claim 1, wherein: the tunnel air inlet system (15) consists of an inlet cap (15-1), an inlet filter screen (15-2) and a buried inlet pipeline (15-3); the air inlet filter screen (15-2) is arranged at the air inlet of the buried air inlet pipeline under the air inlet cap (15-1).
6. The dry-wet separation multi-air-inlet composite closed cooling tower as claimed in claim 5, wherein: the buried air inlet pipeline (15-3) is a straight pipeline or a spiral pipeline according to the size of heat dissipation load and the area of an available buried pipeline, the cross section size of the buried air inlet pipeline (15-3) is determined according to the design air volume and the air inlet speed requirement, the length of the buried air inlet pipeline (15-3) is determined according to the born design heat dissipation capacity, and the buried depth of the buried air inlet pipeline (15-3) is 4-5 m.
7. An operation adjusting method of a dry-wet separation multi-air-inlet composite closed cooling tower is characterized in that the dry-wet separation multi-air-inlet composite closed cooling tower of any one of claims 1 to 6 is used, and the operation adjusting mode is as follows:
(1) natural air-drying type air cooling mode: when the outdoor environment temperature is low and the cooling water heat dissipation load is small, the first fan (2-1) is started, the air valve (6) and the first air inlet (14-1) are opened, the partition plate (3), the second air inlet (14-2) and the third air inlet (14-3) are closed, and the right chamber (1-2) stops running; at the moment, cooling circulating water enters the finned tube bundle heat exchanger (12) from a second water inlet (12-1), is cooled by natural wind and dissipates heat, and then flows out from a second water outlet (12-2); outdoor air enters the left chamber (1-1) from the first air inlet (14-1), exchanges heat with the finned tube heat exchanger (12) and is discharged from the first fan (2-1);
(2) tunnel air-drying type air-cooling mode: when the outdoor environment temperature rises, the cooling water heat dissipation load is increased, and the independent natural air-drying type air cooling heat dissipation is insufficient, the first fan (2-1) is started and frequency-variable regulated to increase the air pressure, the air valve (6) and the third air inlet (14-3) are opened, the partition plate (3) and the first air inlet (14-1) are closed, and the right chamber (1-2) stops running; at the moment, cooling circulating water enters the finned tube heat exchanger (12) from a second water inlet (12-1), is cooled by the tunnel air and radiates heat, and then flows out from a second water outlet (12-2); outdoor air enters from an air inlet cap (15-1) of a tunnel air system (15), enters a buried air inlet pipeline (15-3) after being filtered by an air inlet filter screen (15-2), enters a left chamber (1-1) from a third air inlet (14-3) after exchanging heat with surrounding soil, and is discharged from a first fan (2-1) after exchanging heat with a finned tube heat exchanger (12);
(3) natural wind evaporative cooling mode: when the outdoor environment temperature is high, the cooling heat dissipation capacity is large, and the tunnel air-drying type air-cooling heat dissipation is insufficient, the second fan (2-2) is started, the spray water pump (7) is started, the second air inlet (14-2) is opened, and the first fan (2-1), the first air port (12-1), the third air port (12-3) and the partition plate (3) are closed; at the moment, cooling circulating water enters the light pipe heat exchanger (11) from the first water inlet (11-1), and flows out from the first water outlet (11-1) after being cooled by natural wind evaporation; outdoor air enters the right chamber (1-2) from the second air inlet (14-2), exchanges heat with the filler (13) through the light pipe heat exchanger (11), absorbs water through the water absorber (4), and is discharged from the second fan (2-2); spraying circulating water enters the spraying exhaust pipes (5) from the water collecting tank (8) and is sprayed out downwards from the nozzles (10) under the action of a spraying water pump (7), and spraying water sequentially passes through the light pipe heat exchanger (11) and the filler (13) and then falls into the water collecting tank (8);
(4) tunnel air evaporative cooling mode: when the outdoor environment temperature is high, the cooling heat dissipation capacity is large, and the natural wind evaporation type cooling heat dissipation is insufficient, the second fan (2-2) is started and frequency-variable regulated to increase the wind pressure, the spray water pump (7) is started, the third air inlet (14-3) and the partition plate (3) are opened, and the first fan (2-1), the first air inlet (14-1), the second air inlet (14-2) and the air valve (6) are closed; at the moment, cooling circulating water enters the light pipe heat exchanger (11) from the first water inlet (11-1), and flows out from the first water outlet (11-1) after being cooled by the tunnel air in an evaporative manner; outdoor air enters from an air inlet cap (15-1) of a tunnel air system (15), enters a buried air inlet pipeline (15-3) after being filtered by an air inlet filter screen (15-2), enters a right cavity (1-2) through a partition plate (3) under the action of negative pressure generated by a second fan (2-2) after exchanging heat with surrounding soil and entering a left cavity (1-1) through a third air inlet (14-3), is discharged out of a tower body through the second fan (2-2) after absorbing water through a water absorber (4) after exchanging heat and moisture with a filler (13) and a light pipe heat exchanger (11), and the spraying circulating water flow path is the same as the natural air cooling mode;
(5) the tunnel air-drying type air cooling and natural air evaporative cooling composite cooling mode comprises the following steps: when the outdoor environment temperature is high, the cooling heat dissipation capacity is large, and the underground air evaporative cooling heat dissipation can not meet the requirements, the first fan (2-1) and the second fan (2-2) are started, the second air inlet (14-2), the third air inlet (14-3) and the air valve (6) are opened, the partition plate (3) and the first air inlet (14-1) are closed, and the spray water pump (7) is started; at the moment, cooling circulating water enters the light pipe heat exchanger (11) and the finned tube heat exchanger (12) from the first water inlet (11-1) and the second water inlet (12-1) respectively, and then flows out from the first water outlet (11-2) and the second water outlet (12-2) respectively after heat exchange; the air flow path in the left chamber (1-1) is the same as the underground air dry cooling mode, the air flow path in the right chamber (1-2) is the same as the natural air evaporative cooling mode, and the spraying circulating water flow path is the same as the natural air evaporative cooling mode.
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| CN113390138A (en) * | 2021-05-14 | 2021-09-14 | 苏州科技大学 | Spray device with built-in dry-wet integrated filler |
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| CN114364223A (en) * | 2021-12-30 | 2022-04-15 | 深圳市英维克科技股份有限公司 | Cooling control method, cooling control device, computer equipment and storage medium |
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