TWI678507B - Dry-wet separation type fog-eliminating water-saving cooling tower - Google Patents

Abstract

A dry-wet separation type mist-elimination water-saving cooling tower mainly includes a tower body and a wet-dry air mixing device, a water spray system, a wet-dry separation area, and an electric air-conditioning device arranged in the tower body from top to bottom in turn. It also includes an exhaust system arranged on the top of the tower body, and an inlet pipe and an outlet pipe arranged on one side of the tower body. The exhaust system is in communication with the wet and dry air mixing device. The invention has the characteristics that the water saving rate of the cooling tower can be greatly improved, and the economic efficiency of water saving can be improved.

Description

Dry-wet separation type fog-eliminating water-saving cooling tower

The invention relates to the technical field of cooling towers, in particular to a dry-wet separation type fog-eliminating water-saving cooling tower.

The water distribution and filler systems in ordinary wet cooling towers are not partitioned. Hot water is sprayed into the filler from the top to the bottom through the water distribution system to form a water film or water droplets. Dry cold air from the outside enters the filler from the bottom to the top. The film or water droplets are used for heat exchange, the air is heated and humidified, and after mixing, it is discharged out of the tower in a state of high temperature and high humidity close to saturation. Rain mist (white smoke) will be formed when the outside temperature is low or the humidity is high, and it will run on the cooling tower In the process, a large amount of fresh water needs to be continuously replenished, and more water is consumed.

Based on the above-mentioned shortcomings, water-saving and anti-fog cooling towers came into being. However, the current water-saving and mist-removing cooling towers generally consider mist and water reduction in spring and autumn and winter. In this way, the water-saving time in a year is limited, and the average annual water-saving rate is not high. The economic benefits for the northern water-scarce areas are not high. Very obvious.

In order to overcome the shortcomings of the prior art, an object of the present invention is to provide a dry-wet separation type mist-eliminating water-saving type which can greatly improve the water-saving rate of a cooling tower, improve water-saving economic benefits, and is not limited by the seasons, and can realize annual water-saving Cooling Tower.

To solve the above problems, the technical solutions adopted by the present invention are as follows:

A dry-wet separation type mist-eliminating water-saving cooling tower, which comprises a tower body and a dry-wet air mixing device, a water spraying system, a dry-wet separation area, and an electric air-conditioning device arranged in the tower body from top to bottom. The device further includes an exhaust system arranged on the top of the tower body, and an inlet pipe and an outlet pipe arranged on one side of the tower body, the exhaust system is in communication with the wet and dry air mixing device;

The dry-wet separation zone includes mutually independent dry-cooled zones and wet-cooled zones, and the dry-cooled zone and the wet-cooled zone are sealed and separated by a partition, and the number of the dry-cooled zone and the wet-cooled zone is multiple, A filler is provided in the wet cold area, and at least one pair of dry cooling modules is provided in the dry cold area. The dry cooling module is connected with the water inlet pipe and the water outlet pipe through a connecting pipe, and the water spraying system is connected with The water outlet pipe is communicated with each other, and the water outlet pipe is provided with a dry-wet cold running valve and a dry cold running valve. The pair of dry cooling modules are arranged in a "mountain-shaped" structure, and the electric air-conditioning device is provided in the wet cooling. Below the area.

Further, the water spraying system includes a water spray pipe and a shower head, and a plurality of the spray heads are provided and all are installed on the water spray pipe, and one end of the water spray pipe passes through the water pipe and the water outlet pipe. In communication, the dry-wet cold running valve is located between the connecting pipe and the water pipe, and the dry cold running valve is located between the connecting pipe and the outlet of the water outlet pipe.

Further, the shower head is disposed in the wet cold area and the shower head is located directly above the filler.

Further, a pool is provided at the bottom of the tower body, and the water outlet pipe is arranged above the pool.

Further, a water collector is further provided in the tower body, and the water collector is located between the dry and wet air mixing device and the water spraying system.

Further, the exhaust system includes a fan, a fan, and a motor. The fan is provided on the top of the tower and the fan is in communication with the wet and dry air mixing device. An air cylinder is connected to the motor, the motor is installed on the top of the tower body, and the motor is located on one side of the air cylinder.

Further, a balustrade is provided on the top of the tower body, the balustrade is provided at an edge of the top of the tower body, the balustrade includes at least one cross bar and a plurality of vertical bars, and the plurality of vertical bars are installed in parallel with each other On the top of the tower body, the cross bar is mounted on top of the plurality of vertical bars.

Further, there are 7-14 wet-cold areas and 3-6 dry-cold areas.

Further, there are four pairs of dry cooling modules in each of the dry cooling zones.

Compared with the prior art, the present invention has the beneficial effect that the present invention separates the cooling tower from dry and wet cooling, and divides it into dry and cold zones arranged in a cross space, so that the hot water from the upper tower first passes through the connecting pipe of the dry and cold zone. Enter the dry cooling module, cool the cooling tower through the dry cooling module (the part is the heat transfer of the partition wall, no water is evaporated, and play a role of water saving). The water from the dry cooling module can enter the water pipe through the water outlet pipe, or directly Cooling tower pool; if the effluent of the dry cooling module enters the water pipe, you need to close the dry cooling operation valve and open the dry-wet cooling operation valve. The loop water after the cooling of the dry cooling module enters the sprinkler system and is sprayed on the filler through the sprinkler system. On the other hand, wet cooling, evaporative heat dissipation and cooling are performed through the filler, and dry-wet cooling is used to complete the loop water cooling tower. At this time, the operation mode is dry-wet cooling operation. If the effluent of the dry cooling module directly enters the cooling tower pool, then the dry-wet cooling operation valve needs to be closed and the dry cooling operation valve is opened. At this time, all the circulating water is cooled by the dry cooling module. This operation mode is full dry cooling operation. In winter Under certain meteorological conditions, 100% water saving can be achieved with zero evaporation and zero rain and fog.

In order to meet the requirements of summer thermal engineering, traditional water-saving cooling towers cannot perform water-saving operation in summer, and the evaporation of circulating water in summer is the largest in the year. The invention adopts dry-wet independent partition to achieve full Every season of the year can achieve water saving, making the water saving rate higher.

For a 1000t / h cooling tower (taking the northern climate as an example), the temperature difference is 10 ° C, and the annual cooling water evaporation of a conventional cooling tower is 92,000 tons. After using dry-wet subunits to independently operate the water-saving and anti-fog cooling tower, The annual water evaporation can reach ≤46,000 tons, and the average annual water saving rate can reach ≥50%, which greatly improves the water saving rate and has obvious economic benefits.

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples.

Embodiment 1, as shown in FIG. 1 to FIG. 4, a dry-wet separation type mist-eliminating water-saving cooling tower includes a tower body 1 and a dry-wet air mixing device 2 arranged in the tower body 1 from top to bottom in this order. The water spraying system 3, the wet and dry separation zone 4, and the electric air conditioning device 5 further include an air exhaust system 6 provided on the top of the tower 1, and an inlet pipe 7 and an outlet pipe 8 provided on the side of the tower 1. The exhaust system 6 is in communication with the dry-wet-air mixing device 2; the dry-wet separation zone 4 includes a dry-cool zone 41 and a wet-cool zone 42 that are independent of each other, and a partition is provided between the dry-cool zone 41 and the wet-cool zone 42 43 are sealed and separated, the number of the dry and cold zones 41 is set to six, and the number of the wet and cold zones 42 is set to 14, so that annual water saving can be achieved. The wet and cold zones 42 are provided with fillers 44 and each dry and cold zone There are four pairs of dry-cooling modules 45 in 41. The dry-cooling modules 45 are connected to the water inlet pipe 7 and the water outlet pipe 8 through a connecting pipe 9, and the water spraying system 3 is connected to the water outlet pipe 8. The dry-wet-cooling operation valve 81 and the dry-cooling operation valve 82 are arranged on the water outlet pipe 8, and each pair of dry-cooling modules 45 has a “mountain” shape. The structure is set so that the dry cooling module 45 has a higher heat exchange area on the same area, so that the annual water saving rate is higher. The electric air conditioning device 5 is arranged below the wet and cold area 42 In the present invention, by installing an electric air conditioning device 5 on the air inlet surface of the tower 1 and closing the electric air conditioning device 5 in winter, the area ratio of the dry cooling area 41 is increased, the wind speed of the dry cooling area 41 is increased, and the dry cooling module 45 is strengthened. Heat transfer performance. At the same time, dry-wet-cooling operation valve 81 and dry-cooling operation valve 82 are set on the water outlet pipe 8, so that the water from the dry cooling module 45 can directly enter the cooling tower pool 10, and only the dry cooling area 41 can complete the loop water temperature drop. To achieve full dry and cold operation in winter, 100% water saving, zero rain and fog.

In addition, the dry and wet air mixing device 2 is used, so that the dry and wet air in the tower body is fully mixed, and the uniformity after mixing is as high as 95% or more, and the antifog effect is better.

As shown in FIG. 4, the present invention further provides a cleaning device 14 on one side of each dry cooling module 45. The cleaning device 14 includes a cleaning main pipe 141, a cleaning branch pipe 142, and a cleaning nozzle 143. A plurality of cleaning branch pipes 142 are provided on the cleaning branch pipe 142, and the plurality of cleaning branch pipes 142 are in communication with the cleaning main pipe 141, and a water passing pipe 144 is also provided between the cleaning main pipe 141 and the connecting pipe 9. A control valve 145 is provided on the water pipe 144. In this way, the dry-cooling module 45 can be cleaned online, eliminating the trouble of manual cleaning, very convenient maintenance, and one-to-one cleaning, high efficiency and good effect; and each pair of dry-cooling modules 45 has two cleaning devices 14, which The two cleaning devices 14 and the water-passing pipe 144 form an umbrella structure, which ensures the structural rigidity of the cleaning device 14.

As shown in FIG. 1 and FIG. 3, the shower system 3 includes a water spray pipe 31 and a shower head 32. A plurality of the shower heads 32 are provided and all are installed on the water spray pipe 31. A shower head 32 is disposed in the wet and cold area 42 and the shower head 32 is located directly above the filler 44. One end of the water spray pipe 31 communicates with the water outlet pipe 8 through a water pipe 33. In this way, the water in the water spray pipe 31 is sprayed on the filler 44 through the shower head 32, and the filler 44 is used for wet cooling, evaporation, heat dissipation, and temperature reduction.

The dry-wet cold running valve 81 is located between the connecting pipe 9 and the water pipe 33, and the dry-cooling running valve 82 is located between the connecting pipe 9 and the outlet of the water outlet pipe 8. The operation valve 81 and the dry-cooling operation valve 82 can perform dry-wet-cooling operation or full dry-cooling operation. In this way, water saving can be achieved throughout the year, which greatly improves the water saving rate and has obvious economic benefits.

A pool 10 is provided at the bottom of the tower body 1, and the water outlet pipe 8 is disposed above the pool 10.

A water collector 13 is also provided in the tower body 1. The water collector 13 is located between the dry and wet air mixing device 2 and the water spraying system 3. The water collector 13 is used to collect the dry and wet air mixing device 2. Falling water drops.

The exhaust system 6 includes a fan 62, a wind turbine 61, and a motor 63. The wind turbine 61 is disposed on the top of the tower 1 and the wind turbine 61 is in communication with the wet and dry air mixing device 2. A fan 62 is provided in the air cylinder 61 and is connected to the motor 63. The motor 63 is installed on the top of the tower 1 and the motor 63 is located on one side of the air cylinder 61, which is convenient to dry and wet air. The gas in the mixing device 2 is extracted from the outside of the tower body to form convection.

The top of the tower body 1 is provided with a railing, and the railing is provided at an edge of the top of the tower body 1. The railing includes a crossbar 11 and a plurality of vertical bars 12, and the plurality of vertical bars 12 are parallel to each other. It is installed on the top of the tower body 1, and the cross bar 11 is installed on the top of the plurality of vertical bars 12, which is convenient for workers to get on and off the top of the tower body 1, and synchronously guarantee the personal safety of the workers when working on the top of the tower body 1. .

Principle of the invention: In dry-wet cooling operation, in dry-cooling zone 41, after cold air is exchanged with hot water from upper tower through dry-cooling module 45, hot water enters into heat-exchanging with dry-cooling module 45 from water inlet pipe 7, It becomes hot and dry air; after the hot water in the wet and cold zone 42 contacts the cold air to evaporate and dissipate heat, it becomes saturated hot and humid air. In the dry and wet air mixing device 2, the hot and dry air in the dry and cold zone 41 and the saturated hot and humid air in the cold and cold zone 42 After being thoroughly mixed by the air mixer 2, after exiting the cooling tower, it becomes unsaturated air. When this air encounters the ambient ambient air, there will be no supersaturation, no condensed water will be precipitated, and no Rain and fog, good environmental protection benefits.

The beneficial effect of the present invention is that the present invention separates dry cooling and wet cooling of the cooling tower, and divides it into a dry cooling zone 41 and a wet cooling zone 42 arranged in a cross space, so that the hot water of the upper tower first enters through the connecting pipe 9 of the dry cooling zone 41 The dry cooling module 45 cools the cooling tower through the dry cooling module 45 (the part is the heat transfer of the partition wall, and the water is evaporated to play a water-saving role). The water from the dry cooling module 45 can enter the water pipe 33 through the water outlet pipe 8, It can also directly enter the cooling tower pool 10; if the water from the dry cooling module 45 enters the water pipe 33, it is necessary to close the dry cooling operation valve 82, open the dry-wet cooling operation valve 81, and the circulating water cooled by the dry cooling module 45 enters the shower. The water system 3 is sprayed on the packing 44 through the water spraying system 3, and the wet cooling, cooling, and cooling are performed through the packing 44. The dry-wet cooling unit completes the loop water cooling tower. At this time, the operation mode is dry-wet cooling operation. However, if the effluent from the dry cooling module 45 directly enters the cooling tower pool 10, then the dry-wet cooling operation valve 81 needs to be closed and the dry cooling operation valve 82 is opened. At this time, all the circulating water is cooled by the dry cooling module 45. This operation mode is full Dry and cold operation, under specific weather conditions in winter, can achieve 100% water saving, and achieve zero evaporation and zero rain and fog.

For a 1000t / h cooling tower (taking the northern climate as an example), the temperature difference is 10 ° C, and the annual cooling water evaporation of a conventional cooling tower is 92,000 tons. After using dry-wet subunits to independently operate the water-saving and anti-fog cooling tower, The annual water evaporation can reach ≤46,000 tons, and the average annual water saving rate can reach ≥50%, which greatly improves the water saving rate and has obvious economic benefits.

In summary, the present invention can indeed achieve the aforementioned purpose, and it has indeed complied with the provisions of the Patent Law, and has filed a patent application in accordance with the law. However, the above are only the preferred embodiments of the present invention, and the scope of implementation of the present invention cannot be limited by this; for those skilled in the art, other various techniques can be made according to the technical solutions and concepts described above. Corresponding changes and deformations, and all these changes and deformations should fall within the protection scope of the claims of the present invention.

1‧‧‧ tower

10‧‧‧ Pool

11‧‧‧ Crossbar

12‧‧‧ vertical pole

13‧‧‧ water collector

14‧‧‧cleaning device

141‧‧‧cleaning supervisor

142‧‧‧Cleaning branch pipe

143‧‧‧Cleaning nozzle

144‧‧‧Water pipe

145‧‧‧Control valve

2‧‧‧ Dry and wet air mixing device

3‧‧‧ Dripping system

31‧‧‧Spray pipe

32‧‧‧ sprinkler

33‧‧‧Water pipe

4‧‧‧ wet and dry separation zone

41‧‧‧Dry cold zone

42‧‧‧Wet-cold zone

43‧‧‧ bulkhead

44‧‧‧ filler

45‧‧‧dry cooling module

5‧‧‧ Electric air conditioning device

6‧‧‧Exhaust system

61‧‧‧ Hair dryer

62‧‧‧fan

63‧‧‧Motor

7‧‧‧ water inlet pipe

8‧‧‧ Outlet pipe

81‧‧‧Dry-wet cold running valve

82‧‧‧Dry-cooled running valve

9‧‧‧ connecting pipe

FIG. 1 is a schematic structural diagram of the present invention. Fig. 2 is a schematic structural view along the line B-B in Fig. 1. Fig. 3 is a schematic structural view taken along line A-A in Fig. 2. FIG. 4 is a schematic structural diagram of a cleaning device in the present invention.

Claims (9)

A dry-wet separation type mist-eliminating water-saving cooling tower, which comprises a tower body and a dry-wet air mixing device, a water spraying system, a dry-wet separation area, and an electric air-conditioning device arranged in the tower body from top to bottom. The device further comprises an exhaust system provided on the top of the tower body, and an inlet pipe and an outlet pipe provided on one side of the tower body, the exhaust system is in communication with the wet and dry air mixing device; the dry and wet separation zone includes Independent dry and cold areas and wet and cold areas, the dry and cold areas and the wet and cold areas are sealed and separated by partitions, and the number of the dry and cold areas and the wet and cold areas are multiple, and fillers are provided in the wet and cold areas There is at least one pair of dry cooling modules in the dry cooling zone. The dry cooling module is connected with the water inlet pipe and the water outlet pipe through a connecting pipe, and the water spraying system is connected with the water outlet pipe. The water outlet pipe is provided with a dry-wet cold running valve and a dry cold running valve, the pair of dry cooling modules are arranged in a "mountain" -shaped structure, the electric air conditioning device is arranged below the wet cold zone, and the; One side of each dry cooling module A cleaning device is provided. The cleaning device includes a cleaning main pipe, a cleaning branch pipe, and a cleaning nozzle. The cleaning nozzle is provided on the cleaning branch pipe. The cleaning branch pipe is provided with a plurality of the cleaning branch pipes and the cleaning branch pipe. A cleaning main pipe is communicated with each other, and a water pipe is further provided between the cleaning pipe and the connecting pipe, and a control valve is provided on the water pipe. The dry-wet separation type defogging and water-saving cooling tower according to item 1 of the scope of patent application, wherein the water spraying system includes a water spray pipe and a shower head, and the number of the shower heads is provided in a plurality and Both are installed on the water spray pipe, one end of the water spray pipe communicates with the water outlet pipe through a water pipe, the dry-wet cold running valve is located between the connecting pipe and the water pipe, and the dry cold running valve is located in the water pipe. Between the connection pipe and the outlet of the water outlet pipe, the pair of dry cooling modules are arranged in a "mountain" shape, which has two of the cleaning devices, and the two cleaning devices and the water pipe form an umbrella.形 结构。 Shaped structure. The dry-wet separation type defogging and water-saving cooling tower according to item 2 of the scope of patent application, wherein the sprinkler head is disposed in the wet and cold area and the sprinkler head is directly above the filler . According to item 2 of the scope of the patent application, the dry-wet separation type defogging and water-saving cooling tower is provided, wherein the bottom of the tower body is provided with a pool, and the water outlet pipe is arranged above the pool. The dry-wet separation type defogging water-saving cooling tower according to item 2 of the scope of the patent application, wherein a water receiver is further disposed in the tower body, and the water receiver is located in the dry-wet air mixing device and Watering system. The dry-wet separation type defogging and water-saving cooling tower according to item 2 of the scope of patent application, wherein the exhaust system includes a fan, a wind drum and a motor, the wind drum is disposed on the top of the tower body and The blower is in communication with the wet and dry air mixing device. The fan is arranged in the blower and connected to the motor. The motor is installed on the top of the tower and the motor is located on the wind. One side of the tube. The dry-wet separation type defogging and water-saving cooling tower according to item 2 of the scope of patent application, wherein a top of the tower body is provided with a railing, and the railing is provided at an edge of the top of the tower body. The railing includes at least one cross bar and a plurality of vertical bars, the plurality of vertical bars are installed parallel to each other on the top of the tower body, and the cross bars are installed on the top of the plurality of vertical bars. According to item 2 of the scope of the patent application, the dry-wet separation type defogging and water-saving cooling tower is provided, wherein the wet-cooling zone is provided with 7-14, and the dry-cooling zone is provided with 3-6. According to item 8 of the scope of the patent application, the dry-wet separation type defogging and water-saving cooling tower is provided, wherein four pairs of dry cooling modules in each of the dry cooling zones are provided.