CN211060700U - A pre-cooling type evaporative cooling closed cooling tower - Google Patents

Abstract

The utility model discloses a precooling type evaporative cooling closed cooling tower, which comprises a unit shell, wherein an air inlet is arranged on the side wall of one side of the unit shell, and an air outlet is arranged on the top wall of the unit shell; an air filter is arranged in the unit shell close to the air inlet, one side of the air filter is sequentially provided with a water distributor a, a surface cooler, an indirect evaporative cooling section and a filler unit, a coil pipe, a water distributor b and a water baffle a are sequentially arranged above the filler unit from bottom to top, and the water baffle a is positioned below the air outlet; and a water tank is arranged below the indirect evaporative cooling section and the filler unit and is connected with the water distributor a, the indirect evaporative cooling section and the water distributor b through a water pipe network. The utility model discloses the cooling tower has solved that the cooling tower goes out that the water temperature range is limited and the cooling range is not enough to and the secondary of the lower temperature that indirect evaporative cooling technique obtained is aired exhaust the extravagant problem of cold volume that causes.

Description

A pre-cooling type evaporative cooling closed cooling tower

technical field

The utility model belongs to the technical field of air conditioning equipment, in particular to a precooling type evaporative cooling closed cooling tower.

Background technique

At present, the proportion of air-conditioning system energy consumption in the total building energy consumption is still increasing. In the traditional mechanical refrigeration and air-conditioning system, the cooling tower provides cooling water to the condenser to take away the heat on the surface of the condenser, but the outlet water temperature of the cooling tower is restricted by the outdoor weather conditions, resulting in a limited outlet water temperature range.

Cooling towers are generally divided into open cooling towers and closed cooling towers. It is an energy-saving technology that uses natural cold sources to provide cooling capacity to buildings, and cools cooling water by replacing mechanical refrigeration chillers. It is currently widely used. However, with the change of global climate, the cooling rate of traditional closed cooling tower is not enough.

Evaporative cooling technology can be divided into direct evaporative cooling technology and indirect evaporative cooling technology. The cooling capacity carried by the lower temperature secondary exhaust air obtained by the indirect evaporative cooling technology is generally directly discharged to the atmosphere through the secondary exhaust fan, resulting in a waste of cooling capacity.

Utility model content

The purpose of this utility model is to provide a pre-cooling type evaporative cooling closed cooling tower, which solves the problem that the cooling tower outlet water temperature range is limited and the cooling range is insufficient, as well as the lower temperature secondary exhaust air obtained by the indirect evaporative cooling technology. Caused by the waste of cooling capacity.

The technical scheme adopted by the utility model is that a pre-cooling type evaporative cooling closed cooling tower includes an organic unit casing, an air inlet is arranged on one side wall of the unit casing, and an air inlet is arranged on the top wall of the unit casing. There is an air outlet; an air filter is arranged in the unit shell near the air inlet, and one side of the air filter is sequentially provided with a water distributor a, a surface cooler, an indirect evaporative cooling section, and a packing unit. The top of the packing unit is from the bottom The coil, the water distributor b and the water baffle a are arranged in sequence from the top, and the water baffle a is located below the air outlet;

A water tank is arranged below the indirect evaporative cooling section and the packing unit, and the water tank is connected to the water distributor a, the indirect evaporative cooling section and the water distributor b through the water pipe network.

An exhaust fan is arranged in the exhaust port.

The packing unit includes packing c, packing b and packing a arranged in sequence from top to bottom, packing c is located below the surface cooler, and packing a is located above the water tank.

The utility model is also characterized in that,

Filler c, filler b and filler a are all GLASdek inorganic fillers.

The air filter is a coarse filter.

The indirect evaporative cooling section includes a water baffle b, a water distributor c, and a plate-and-tube indirect evaporative cooler arranged in sequence from top to bottom. The plate-and-tube indirect evaporative cooler is located above the water tank, and the water distributor c is connected to the water tank through a water pipe network. ;

A secondary air inlet is provided on the side wall of the unit shell corresponding to the plate-tube indirect evaporative cooler and the water tank; The side walls of the unit casing are communicated.

The water distributor a is a high-pressure micro-mist water distributor, and the water distributor b and the water distributor c are drip-type water distributors.

The secondary air inlet is the grille air outlet.

The water pipe network includes a water pipe b. The water pipe b is connected with a water pipe a, a water pipe d and a water pipe c. The water pipe a is also connected with the water distributor a, the water pipe d is also connected with the water distributor c, and the water pipe c is also connected with the water distributor b. .

The water pipe b is provided with an electronic water treatment instrument and a water pump, the water pipe a is provided with a valve a, the water pipe d is provided with a valve c, and the water pipe c is provided with a valve b.

The beneficial effects of the present utility model are:

(1) Compared with the traditional closed cooling tower, the cooling tower of the utility model combines the surface cooling-plate tube indirect-direct organically into an integrated double-side air inlet precooling type closed cooling tower, which realizes the return of the end of the water. Step cooling increases the cooling range of the return water, which can provide cold water with lower temperature to the indoor end.

(2) The cooling tower of the present utility model makes full use of the cooling capacity carried by the lower temperature secondary exhaust air obtained by the plate-tube indirect evaporative cooler, and the secondary exhaust air not only realizes the indirect pre-cooling of the return water in the coil, It also reduces the temperature of the water spraying part above the coil, and at the same time reduces the problem of scale formation on the surface of the coil; compared with the traditional indirect evaporative cooling section, there is no secondary exhaust fan, which reduces the energy consumption of the cooling tower.

(3) In the cooling tower of the present utility model, the packing under the coil is arranged in layers, which effectively reduces the resistance of the air, optimizes the distribution of air and spray water, and improves the evaporative cooling efficiency. Cooling of the return water at the end of the tube.

(4) In the cooling tower of the present utility model, the spray section above the plate-and-tube indirect evaporative cooler shares a water pump with the spray section above the coil, and different spray sections are selectively opened by controlling the valve, effectively Reduce cooling tower energy consumption.

Description of drawings

Figure 1 is a schematic structural diagram of a pre-cooling type evaporative cooling closed cooling tower of the present invention.

In the figure, 1. Air inlet, 2. Air filter, 3. Water distributor a, 4. Water pipe a, 5. Valve a, 6. Water tank, 7. Secondary air inlet, 8. Plate tube indirect evaporative cooler , 9. Electronic water treatment instrument, 10. Water pipe b, 11. Water pump, 12. Packing a, 13. Valve b, 14. Packing b, 15. Valve c, 16. Packing c, 17. Coil pipe, 18. Cloth Water device b, 19. Water baffle a, 20. Exhaust fan, 21. Air outlet, 22. Water pipe c, 23. Secondary air pipe, 24. Water baffle b, 25. Water pipe d, 26. Water distribution Device c, 27. Surface cooler.

Detailed ways

The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

The utility model is a pre-cooling type evaporative cooling closed cooling tower, as shown in FIG. 1 , comprising an organic unit casing, an air inlet 1 is arranged on one side wall of the unit casing, and an air inlet 1 is arranged on the top wall of the unit casing. There is an air outlet 21; an air filter 2 is arranged in the unit casing near the air inlet 1, and one side of the air filter 2 is sequentially provided with a water distributor a3, a surface cooler 27, an indirect evaporative cooling section, a filler unit, and a filler. The top of the unit is provided with a coil 17, a water distributor b18 and a water baffle a19 in order from bottom to top, and the water baffle a19 is located below the air outlet 21;

A water tank 6 is arranged below the indirect evaporative cooling section and the packing unit, and the water tank 6 is connected to the water distributor a3, the indirect evaporative cooling section and the water distributor b18 through a water pipe network.

The water tank 6 is located horizontally below the plate-and-tube indirect evaporative cooler 8 and the packing unit. The two share a water tank 6 and a water pump 11. Different spray sections can be selectively opened through valves to effectively reduce the energy consumption of the cooling tower.

An exhaust fan 20 is provided in the exhaust port 21 .

The packing unit includes packing c16 , packing b14 and packing a12 arranged in sequence from top to bottom. The packing c16 is located below the surface cooler 27 , and the packing a12 is located above the water tank 6 .

The filler c16, the filler b14 and the filler a12 are all GLASdek inorganic fillers. The filler c16, the filler b14 and the filler a12 are arranged in layers, which can effectively reduce the air resistance, optimize the distribution of air and spray water, and improve the evaporative cooling efficiency.

Air filter 2 is a coarse filter.

The indirect evaporative cooling section includes a water baffle b24, a water distributor c26 and a plate-and-tube indirect evaporative cooler 8 arranged in sequence from top to bottom. The plate-and-tube indirect evaporative cooler 8 is located above the water tank 6, and the water distributor c26 passes through the water pipe network. It is connected to the water tank 6; the plate-and-tube indirect evaporative cooler 8 is a plate-and-tube type, the material is aluminum foil, and the tube is covered with water-absorbing fiber material, which can enhance the evaporative cooling effect. clogged, easy to clean;

A secondary air inlet 7 is provided on the side wall of the unit casing corresponding to the plate-and-tube indirect evaporative cooler 8 and the water tank 6; The side walls of the unit casing corresponding to one side are communicated with each other.

The water distributor a3 is a high-pressure micro-mist water distributor, and the water distributor b18 and the water distributor c26 are drip-type water distributors.

The secondary air inlet 7 is a grille tuyere.

The water pipe network includes a water pipe b10. The water pipe b10 is connected with a water pipe a4, a water pipe d25 and a water pipe c22. The water pipe a4 is also connected with the water distributor a3, the water pipe d25 is also connected with the water distributor c26, and the water pipe c22 is also connected with the water distributor b18. , The water pipe material is PVC pipe.

The water pipe b10 is provided with an electronic water treatment device 9 and a water pump 11, the water pipe a4 is provided with a valve a5, the water pipe d25 is provided with a valve c15, and the water pipe c22 is provided with a valve b13. By opening or closing different valves to selectively open different spray sections, effectively reducing the energy consumption of the cooling tower.

The working flow of the water system of a precooling type evaporative cooling closed cooling tower of the utility model:

(1) Cooling tower water supply system

The end return water first enters the unit surface cooler 27 through the water pipe to realize the first-stage pre-cooling, and then enters the coil pipe 17. After the sensible heat exchange is carried out through the pipe wall of the coil pipe 17 and the water film covered by the pipe, the cold energy is supplied to the room. After the end, it returns to the surface cooler 27 of the unit to dissipate heat, and the cycle is repeated.

(2) Evaporative cooling circulating water system

The water in the water tank 6 is divided into three parts by the water pipe 10 under the action of the water pump 11, and a part enters the water distributor 26 of the indirect evaporative cooling section through the water pipe 25, and forms a water film on the surface of the indirect evaporative cooler 8 of the plate and tube, lowering the plate and tube. The temperature of the primary air in the indirect evaporative cooler 8 falls into the water tank 6, and the cycle is repeated; a part enters the water distributor 18 above the coil 17 through the water pipe 22, and a water film is formed on the surface of the coil 17, cooling the water in the coil 17. The water returns at the end, and then falls to the lower fillers 16, 14, and 12 in order to undergo a direct evaporative cooling process. After the water temperature drops, it falls into the water tank 6, and the cycle is repeated; Atomized fine water droplets are formed on the surface of the surface cooler 27 to pre-cool the surface cooler 27 .

The use method and function of a pre-cooling type evaporative cooling closed cooling tower of the present utility model are described as follows:

(1) Wet operating mode

When the whole machine is turned on, the outdoor fresh air enters the unit through the air inlet 1 under the action of the exhaust fan 20. After being filtered and purified by the air filter 2, it is atomized with the high-pressure micro-mist water distributor a 3 in front of the surface cooler 27. The water droplets are in direct contact, and the process of direct evaporative cooling and other enthalpy cooling occurs, which realizes the pre-cooling of the end return water in the surface cooler 27, and the fresh air enters the plate-and-tube indirect evaporative cooler 8 and is cooled by the same humidity, and then enters the filler a12 and the filler. b14. The packing c16 is cooled by isenthalpy. At this time, the temperature of the fresh air obtained through the indirect-direct evaporative cooling process is lower than the wet bulb temperature of the outdoor air. The low-temperature cold air directly contacts the water film formed on the surface of the coil 17 and greatly cools the coil. After the water is returned to the end of the pipe 17, it is discharged through the water blocking plate 19a under the action of the exhaust fan 20.

Another outdoor fresh air enters the wet channel of the plate-and-tube indirect evaporative cooler 8 through the secondary air inlet 7, and forms a direct contact with the surface of the plate-and-tube indirect evaporative cooler 8 to form a water film to obtain secondary exhaust air with a lower temperature. The cooling energy carried by the exhaust air passes through the water baffle 24b and the surface of the coil 17 through the secondary air pipe 23 to realize the indirect pre-cooling of the return water at the end of the coil 17, and also reduce the temperature of the water spraying part above the coil 17. , while reducing the problem of scale formation on the surface of the coil 17 .

According to different outdoor conditions, the unit can selectively open different spray sections by controlling valve a, valve b, and valve c, which can effectively reduce the energy consumption of the cooling tower.

(2) Dry operating mode

Turn off the water pump 11 and empty the water in the water tank 6 to avoid the problems of antifreeze and water treatment in winter. The outdoor low-temperature air enters the unit through the air inlet 1 under the action of the exhaust fan 20, and after being filtered and purified by the air filter 2, the end return water in the surface cooler 27 and the coil 17 is cooled in turn, and the cooled low-temperature return water. After being sent to the room for cooling, it is returned to the surface cooler 27 of the unit to dissipate heat, and the cycle is repeated. There is no evaporative consumption of water and no white fog generation in this mode.

Claims (8)

1. A pre-cooling type evaporative cooling closed cooling tower is characterized in that it comprises an organic unit casing, one side wall of the unit casing is provided with an air inlet (1), and the top wall of the unit casing is provided with an air inlet (1). An air outlet (21) is provided; an air filter (2) is arranged in the unit casing near the air inlet (1), and one side of the air filter (2) is sequentially provided with a water distributor a (3), a surface cooler A coil (17), a water distributor b (18) and a water blocking plate a (19) are arranged above the packing unit in order from bottom to top. The water plate a (19) is located below the air outlet (21); A water tank (6) is arranged below the indirect evaporative cooling section and the packing unit, and the water tank (6) is connected to the water distributor a (3), the indirect evaporative cooling section and the water distributor b (18) through a water pipe network; An exhaust fan (20) is arranged in the exhaust port (21); The packing unit includes a packing c (16), a packing b (14) and a packing a (12) arranged in sequence from top to bottom, the packing c (16) is located below the surface cooler (27), and the packing a ( 12) Above the water tank (6). 2. A kind of pre-cooling type evaporative cooling closed cooling tower according to claim 1, is characterized in that, described packing c (16), packing b (14) and packing a (12) are GLASdek inorganic packing . 3 . The pre-cooling type evaporative cooling closed cooling tower according to claim 1 , wherein the air filter ( 2 ) is a coarse filter. 4 . 4 . The pre-cooling type evaporative cooling closed cooling tower according to claim 1 , wherein the indirect evaporative cooling section comprises a water baffle b ( 24 ), a water distributing plate b ( 24 ) arranged in sequence from top to bottom The device c (26) and the plate-and-tube indirect evaporative cooler (8), the plate-and-tube indirect evaporative cooler (8) is located above the water tank (6), and the water distributor c (26) is connected to the water tank (6) through the water pipe network; A secondary air inlet (7) is provided on the side wall of the unit casing corresponding to the plate-and-tube indirect evaporative cooler (8) and the water tank (6); the top wall of the unit casing corresponding to the water baffle b (24) passes through The secondary air pipe (23) communicates with the side wall of the unit casing corresponding to one side of the coil pipe (17). 5. A pre-cooling type evaporative cooling closed cooling tower according to claim 4, characterized in that, the water distributor a (3) is a high-pressure micro-mist water distributor, and the water distributor b (18) and the water distributor c (26) are drip-type water distributors. 6 . The pre-cooling evaporative cooling closed cooling tower according to claim 4 , wherein the secondary air inlet ( 7 ) is a grille tuyere. 7 . 7. The pre-cooling type evaporative cooling closed cooling tower according to claim 4, wherein the water pipe network comprises a water pipe b (10), and the water pipe b (10) is connected with a water pipe a (4). ), water pipe d (25) and water pipe c (22), the water pipe a (4) is also connected with the water distributor a (3), the water pipe d (25) is also connected with the water distributor c (26), The water pipe c (22) is also connected to the water distributor b (18). 8. A pre-cooling type evaporative cooling closed cooling tower according to claim 7, characterized in that, an electronic water treatment device (9) and a water pump (11) are provided on the water pipe b (10), and the The water pipe a (4) is provided with a valve a (5), the water pipe d (25) is provided with a valve c (15), and the water pipe c (22) is provided with a valve b (13).

Images