CN204313666U - A kind of closed cooling tower - Google Patents

Abstract

The utility model provides a closed cooling tower, which relates to the technical field of high-efficiency cooling equipment, and is used to solve the problems of large water consumption, high discharge, and high maintenance costs for operation and use of the existing closed cooling tower; The cooling tower includes a shell, which is equipped with a water tank, a pipe box, a sprayer, a mist catcher and a fan. The pipe box includes a support frame and a tube bundle. The tube bundle includes straight pipes and bent pipes. A plurality of transverse fins, the plurality of fins are evenly arranged along the axial direction of the straight tube, and the fins are of thin sheet type; the utility model forms a tube box by connecting the tube bundles formed by the inclined fins on the outer surface of the straight tube. Not only the external part of the box in contact with the spray water increases the heat exchange area, but also the internal groove structure is used inside the tube bundle to increase the internal heat exchange area, which reduces the equipment footprint and greatly improves the heat exchange efficiency. Cooling saves the amount of water resources, the flow resistance is small, and the maintenance cost of operation and use is low.

Description

A closed cooling tower

technical field

The utility model relates to the technical field of high-efficiency cooling equipment, in particular to a closed cooling tower.

Background technique

A cooling tower is a device that uses low-temperature water to enter a heat exchanger to cool a high-temperature liquid substance, so that it can be recycled. The spray water is sprayed onto the surface of the heat exchange tube to evaporate and absorb the heat of the medium in the tube, and the fan located above the tube bundle is used to force convection heat exchange.

The traditional closed cooling tower uses light pipes for evaporative heat exchange, the heat exchange area is small, and the equipment occupies a large area; the heat exchange area is small in winter, and dry operation cannot be realized; when the temperature is low, a large amount of steam is emitted, polluting the environment, and High operation and maintenance costs.

Utility model content

The utility model proposes a closed cooling tower, which solves the problems of high water consumption, large discharge, and high operation and maintenance costs of the cooling tower in the prior art.

The technical scheme of the utility model is achieved in the following way: it includes a shell, and the shell is respectively provided with a water tank, a pipe box, a sprayer, a mist catcher and a fan, and the shell is also provided with a louver-type air inlet , the water tank is located at the bottom of the housing, the water tank is connected to a water pump, the water pump is placed outside the housing, the water outlet pipe of the water pump is connected to the shower, and the shower Below is the pipe box, above the sprayer is the mist catcher, and above the mist catcher is the fan; the pipe box includes a support frame and is arranged in parallel on the support frame multiple groups of tube bundles, the tube bundle includes a plurality of horizontally arranged straight pipes and vertically arranged bent pipes for connecting the straight pipes, the straight pipes and the bent pipes are located in the same vertical plane; A plurality of transverse fins are arranged on the outer surface of the straight tube, and the plurality of fins are evenly arranged along the axial direction of the straight tube, and the fins are thin-sheet type.

The cold air of the utility model passes through the closed cooling device from bottom to top, and the spray water formed by the sprinkler falls from top to top to evaporate and absorb the heat of the fluid in the tube, and the cooled fluid enters from the upper end of the tube box. And flow out from its lower end, so as to realize the exchange of heat. There are transverse fins on the outer surface of the straight tubes, which increases the heat exchange area of the tube bundle; this kind of tube box increases the heat exchange area and greatly improves the heat exchange efficiency. The cooling device has good heat exchange effect and small flow resistance. The consumption of water resources is saved, and the maintenance cost of its operation and use is also low.

As a preferred embodiment, trapezoidal grooves are further provided on the inner wall of the straight pipe, and the straight pipe and the fins are integrated. The setting of the trapezoidal groove further increases the heat exchange area of the tube box, and the straight tube and fins are integrated, which is convenient for installation, good in use effect, and improves the use efficiency of the fan.

As a preferred embodiment, the fins are one of rectangular, circular, oval or trapezoidal. The fins can be set in different shapes, and fins of various shapes can be used, so that the utility model is simple in design and easy to use. Rectangular fins can form air flow channels up and down to prevent air vortex and further reduce air flow resistance.

As a preferred embodiment, the fan is an axial flow fan, the fan is provided with a streamlined fan cylinder, and the top of the fan is provided with a mesh shield. The streamlined air duct further reduces the wind resistance of the fan, so that its kinetic energy recovery effect is good and the dynamic pressure is low; the mesh shield effectively protects the fan and prevents debris from entering the closed cooling device from the fan, effectively prolonging its service life and reducing The time and cost of its maintenance and overhaul.

As a preferred embodiment, the water tank is also connected to a water inlet pipe through a float switch, and a descaler is also provided on the water outlet pipe of the water pump. The tap water is automatically and timely replenished in the water tank through the float switch; the setting of the descaling device on the outlet pipe of the water pump can remove the dirt in the water in time, effectively avoiding the blockage of the nozzle of the sprinkler.

As a preferred embodiment, an anti-corrosion layer is provided on the inner surface of the housing and the outer surface of the housing. The setting of the anti-corrosion layer enhances the anti-corrosion ability of the shell to prolong its service life.

Working principle: start the closed cooling device, the fan drives the air to enter the closed cooling device from the air inlet of the louver, pass through the pipe box and sprinkler, and after passing through the mist catcher, it is discharged from the air outlet above the fan; the air in the water tank The water is transported to the sprinkler by the water pump, and is sprayed down by the sprinkler. The sprayed water passes through the pipe box and finally falls into the water tank; Tube, in the tube box, the high-temperature fluid interacts with the spray water and cold air to exchange heat, and the sprayed water absorbs heat and partially evaporates and takes away a large amount of heat from the high-temperature fluid, cooling the fluid, and is combined with the tube The liquid outlet pipe connected to the tank flows out, and the evaporated water vapor continues to rise under the action of the air. After the water is removed by the mist catcher, the humid air is discharged from the outlet of the fan, and the remaining water is cooled by the cold air during the falling process. And fall back to the water tank, so as to complete the continuous cycle cooling process.

Beneficial effects of the utility model: the utility model uses the latent heat of evaporation of water for heat exchange, and its heat and mass transfer effect is significantly enhanced; the shape of the straight tube can be various, and the tube bundle formed by connecting the fins on the outer surface of the straight tube Tube box, this kind of tube box increases the heat exchange area, and the inside of the tube bundle adopts a groove structure, which greatly improves the heat exchange efficiency. This closed cooling device saves the amount of water resources in winter, and the maintenance cost of operation and use is low; The resistance is small, the structure is simple, no scale, the service life is prolonged, and the use effect is good.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic plan view of an embodiment of the utility model;

Fig. 2 is the schematic diagram of the three-dimensional structure of the tube box in Fig. 1;

Fig. 3 is a schematic plan view of the tube bundle in Fig. 2;

Fig. 4 is a cross-sectional structural schematic diagram of a straight pipe in Fig. 3;

In the figure: 1-housing; 2-water tank; 3-air inlet; 4-pipe box; 41-support frame; 42-inlet pipe; 43-outlet pipe; - fins; 5 - sprayer; 6 - mist catcher; 7 - fan; 8 - water pump; 9 - descaling device.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Referring to accompanying drawings 1 to 4, the utility model includes a housing 1, which is respectively provided with a water tank 2, a pipe box 4, a sprayer 5, a mist catcher 6 and a fan 7 from bottom to top in the housing 1. The body 1 is also provided with a louver-shaped air inlet 3, the water tank 2 is located at the bottom of the housing 1, the water tank 2 is connected to a water pump 8, the water pump 8 is placed outside the housing 1, and the outlet pipe of the water pump 8 is connected to the sprinkler 5 , The pipe box 4 is below the sprayer 5, the mist catcher 6 is above the sprayer 5, and the fan 7 is above the mist catcher 6. The cold air enters the closed cooling device through the air inlet 3, passes through the pipe box 4, the sprayer 5, the mist catcher 6 and the fan 7 in turn, and is discharged from the outlet of the fan 7; Under the action of the sprayer 5, it is transported to the sprayer 5, and sprayed down by the sprayer 5, and after heat exchange through the tube box 4, it falls into the water tank 2, thereby realizing the circulation of water; the refrigerant in the shell 1. The liquid inlet pipe 42 on the outer side enters the pipe box 4, and after the heat exchange in the pipe box 4 is completed, it flows out through the liquid outlet pipe 43; thereby realizing the cooling process of the fluid.

Referring to accompanying drawing 2 and accompanying drawing 3, pipe box 4 comprises support frame 41 and multiple groups of tube bundles arranged in parallel on support frame 41, multiple groups of tube bundles are connected by support frame 41, and its upper end is connected liquid inlet pipe 42 through distribution pipe, Its lower end is connected with a liquid outlet pipe 43 through a liquid collecting pipe, thereby forming a pipe box 4 . Each group of tube bundles includes a plurality of horizontally arranged straight pipes 44 and vertically arranged curved pipes 45 for connecting the straight pipes 44; in each group of tube bundles, the straight pipes 44 and the curved pipes 45 are located in the same vertical plane.

Referring to accompanying drawing 3, a plurality of transverse fins 46 are arranged on the outer surface of the straight pipe 44, and the plurality of fins 46 are uniformly arranged along the axial direction of the straight pipe 44; the straight pipe 44 and the fins 46 are integrally arranged, and the fins 46 It is a sheet type; the fin 46 is one of rectangle, circle, ellipse or trapezoid. The arrangement of the rectangular fins 46, on the one hand, greatly increases the heat exchange area, changes the flow direction of the air, and makes the air fully contact with the tube bundles; on the other hand, the fins 46 have small flow resistance to the air, and the fan 7 has high efficiency. Of course, trapezoidal grooves can also be provided on the inner wall of the straight pipe 44, so as to further increase the heat exchange area and improve the heat exchange efficiency.

Referring to accompanying drawing 4, in the present embodiment, the straight pipe 44 is a circular pipe, and the fin 46 is a rectangular fin; the fan 7 is an axial flow fan, and the fan 7 is also provided with a streamlined air duct, and the top of the fan 7 is provided with a mesh protection cover; the water tank 2 is also connected to the water inlet pipe through the float switch, and the water outlet pipe of the water pump 8 is also provided with a descaling device 9; the inner surface of the housing 1 and the outer surface of the housing 1 are provided with an anti-corrosion layer; The streamlined air duct can further reduce wind resistance, the mesh protective cover is beneficial to effectively protect the fan 7, the scale remover 9 can remove the dirt in the circulating water in time, and is conducive to maintaining the smoothness of the sprayer 5, and the setting of the anti-corrosion layer can effectively protect the The casing 1 is protected, prolonging the service life of the closed cooling device.

Working principle: start the closed cooling device, the fan 7 drives the air from the louver air inlet 3 into the inside of the closed cooling device, passes through the pipe box 4 and the sprinkler 5, passes through the mist catcher 6, and exits from the top of the fan 7 The air outlet is discharged; the water in the water tank 2 is transported to the sprinkler 5 through the water pump 8, and is sprayed down by the sprinkler 5, and the sprayed water passes through the pipe box 4, and finally falls into the water tank 2; the high-temperature fluid is connected by The liquid inlet pipe 42 of the pipe box 4 enters the uppermost straight pipe 44 in the pipe box 4. In the pipe box 4, the high-temperature fluid interacts with the spray water and cold air to exchange heat, and the sprayed water absorbs heat The latter part evaporates and takes away a large amount of heat of the high-temperature fluid, which lowers the temperature of the high-temperature fluid and flows out from the liquid outlet pipe 43 connected to the pipe box 4. The evaporated water vapor continues to rise under the action of the air and passes through the mist catcher 6 After the moisture is removed, the wet air is discharged from the air outlet of the fan 7, and the remaining water is cooled by the cold air during the falling process, and falls back to the water tank 2, thereby completing the continuous cycle cooling process.

Beneficial effects of the utility model: the utility model uses the latent heat of evaporation of water for heat exchange, and its heat and mass transfer effect is significantly enhanced; the shape of the straight tube 44 can be various, and the fins 46 on the outer surface of the straight tube 44 are connected. The tube bundles form the tube box 4. This tube box 4 increases the heat exchange area and greatly improves the heat exchange efficiency. The closed cooling device saves the amount of water resources in winter (reduces the amount of steam evaporation), and the maintenance of operation and use The cost is low; its structure is simple, no scale, small flow resistance, long service life and good use effect.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (6)

1. A closed cooling tower, comprising a housing, is characterized in that: a water tank, a pipe box, a shower, a mist catcher and a blower fan are respectively arranged in the housing, and a louver type is also provided on the housing The air inlet, the water tank is located at the bottom of the housing, the water tank is connected with a water pump, the water pump is placed outside the housing, the outlet pipe of the water pump is connected with the sprayer, and the sprayer Below the shower is the pipe box, above the sprayer is the mist catcher, and above the mist catcher is the fan; the pipe box includes a support frame and is arranged in parallel on the support Multiple sets of tube bundles on the rack, the tube bundles include a plurality of horizontally arranged straight pipes and vertically arranged bent pipes for connecting the straight pipes, the straight pipes and the bent pipes are located in the same vertical plane ; A plurality of transverse fins are arranged on the outer surface of the straight tube, and the plurality of fins are uniformly arranged along the axial direction of the straight tube, and the fins are thin-sheet. 2. The closed cooling tower according to claim 1, characterized in that: trapezoidal grooves are also provided on the inner wall of the straight pipe, and the straight pipe and the fins are integrated. 3. The fluid cooling tower according to claim 1, wherein the fins are one of rectangular, circular, elliptical or trapezoidal. 4. The closed cooling tower according to any one of claims 1-3, characterized in that: the fan is an axial flow fan, the fan is provided with a streamlined fan cylinder, and the top of the fan is provided with a mesh shield . 5. The closed cooling tower according to claim 4, characterized in that: the water tank is also connected to a water inlet pipe through a float switch, and a descaler is also provided on the water outlet pipe of the water pump. 6. The fluid cooling tower according to claim 5, characterized in that: an anti-corrosion layer is provided on the inner surface of the shell and the outer surface of the shell.