CN105953604A - Water-saving type evaporative cooling device - Google Patents

Abstract

The invention discloses a water-saving evaporative cooling device, which solves the problem that the cooling water recovery efficiency of the existing evaporative cooling device needs to be improved. There are louvers (13) arranged on the side of the cooler bracket, and finned heat exchange tubes (12) are connected between the cooled steam inlet main pipe (14) and the cooled steam heat exchange main pipe (11). A cooling tube bundle (10) is connected between the cooling steam heat exchange main pipe (11) and the return water main pipe (9), and a spray pipe (5) and a first-stage water eliminator (4 ), the spray water fin heat exchange tube (3), the second stage water eliminator (2) and the axial flow fan (1), the spray water fin heat exchange tube is connected with the spray pipe (5), and the cooling A water tank (15) is arranged below the tube bundle, a water delivery pipe (16) is connected between the water tank and the spray water fin heat exchange tube (3), and a circulating water pump (8) is arranged on the water delivery pipe. The present invention is particularly suitable for use in water-deficient areas.

Description

A water-saving evaporative cooling device

technical field

The invention relates to a heat exchange device, especially a water-saving evaporative cooling device, which belongs to the field of refrigeration technology and can be widely used in cooling equipment in industries such as power generation, metallurgy, chemical industry, air conditioning and refrigeration, and light industry, and is especially suitable for Water-scarce areas.

Background technique

Evaporative cooling devices are cooling equipment used in power generation, metallurgy, chemical industry, air-conditioning and refrigeration, and light industry. High-efficiency energy-saving water-saving heat exchange method. Its working principle is: under the suction of the axial flow fan, the cold air passes from the lower part of the evaporative cooling device upwards to the outer surface of the heat exchange tube bundle, and the super strong wind force of the fan makes the heat exchange spray water completely evenly covered On the surface of the condensing exhaust pipe, the high-temperature working medium passes through the condensing exhaust pipe to exchange heat with the water film formed by the spray outside the pipe and the air. Part of the spray water with increased temperature absorbs heat and evaporates into a gaseous state, and the evaporated water vapor carries A large amount of heat is discharged to the atmosphere, and the water droplets in the water vapor are blocked by the water eliminator, and are scattered into the water tank with other water that has absorbed heat, and then pumped into the spray water pipe by the circulating water pump. The cooling water recovery efficiency of the existing evaporative cooling device needs to be improved, and the temperature of the circulating water in the spray water pipe is too high, resulting in more water vapor that evaporates into a gaseous state and is discharged into the atmosphere.

Contents of the invention

The invention provides a water-saving evaporative cooling device, which solves the technical problem that the cooling water recovery efficiency of the existing evaporative cooling device needs to be improved.

The present invention solves the above technical problems through the following technical solutions:

A water-saving evaporative cooling device, including a cooler bracket, an axial flow fan is arranged on the upper end of the cooler bracket, louvers are arranged on the side of the cooler bracket, and cooled steam inlet main pipes are respectively arranged in the cooler bracket 1. Cooled steam heat exchange main pipe and return water main pipe, finned heat exchange tubes are connected between the cooled steam inlet main pipe and the cooled steam heat exchange main pipe, between the cooled steam heat exchange main pipe and the return water main pipe A cooling tube bundle is connected between them, a spray pipe is arranged directly above the cooling pipe bundle, a first-stage water collector is arranged above the spray pipe, and a spray water fin is arranged above the first-stage water collector The heat exchange tube is provided with a second-stage water collector above the spray water fin heat exchange tube, and an axial flow fan is arranged above the second-stage water collector. The spray water fin heat exchange tube and the spray water The tubes are connected together, a water tank is arranged under the cooling tube bundle, a water delivery pipe is connected between the water tank and the spray water fin heat exchange tube, and a circulating water pump is arranged on the water delivery pipe.

A water processor and a valve are respectively arranged on the water delivery pipe.

The invention improves the recovery efficiency of cooling water, and is especially suitable for use in water-scarce regions.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

detailed description

The present invention is described in detail below in conjunction with accompanying drawing:

A water-saving evaporative cooling device, including a cooler bracket, an axial flow fan 1 is arranged on the upper end of the cooler bracket, louvers 13 are arranged on the side of the cooler bracket, and cooled steam inlets are respectively arranged in the cooler bracket The main pipe 14, the cooled steam heat exchange main pipe 11 and the return water main pipe 9, the finned heat exchange tube 12 is connected between the cooled steam inlet main pipe 14 and the cooled steam heat exchange main pipe 11, and the cooled steam A cooling tube bundle 10 is connected between the heat exchange main pipe 11 and the return water main pipe 9, a spray pipe 5 is arranged directly above the cooling pipe bundle 10, and a first-stage water eliminator 4 is arranged above the spray pipe 5. A spray water fin heat exchange tube 3 is arranged above the first stage water eliminator 4, a second stage water eliminator 2 is arranged above the spray water fin heat exchange pipe 3, and the second stage water eliminator Axial flow fan 1 is set above 2, spray water fin heat exchange tube 3 is connected with spray tube 5, and water tank 15 is set below cooling tube bundle 10, and heat exchange between water tank 15 and spray water fin A water delivery pipe 16 is connected between the pipes 3 , and a circulating water pump 8 is arranged on the water delivery pipe 16 .

A water processor 6 and a valve 7 are respectively arranged on the water delivery pipe 16 . The present invention can not only run in wet mode, but also in dry mode. When the ambient temperature is high, the circulating water pump 8 can be put into operation, and the finned heat exchange tube 12 at the air inlet is used for preliminary cooling, and then the cooling tube bundle 10 and spray water are used for evaporative wet cooling. When the ambient temperature is low, the circulating water pump 8 can be stopped, and the spray water supply can be stopped, and the system can only use the finned heat exchange tubes 12 arranged in a staggered arrangement at the air inlet for cooling.

The circulating cooling water is pressurized by the water tank 15 through the circulating water pump 8, and after passing through the valve 7 and the water processor 6, it enters the spraying water fin heat exchange tube 3 to cool the saturated water vapor, and then enters the spraying device 5, and the spray head The water is evenly sprayed on the cooling tube bundle 10, during which it is fully mixed with the air to absorb the heat of the high-temperature process medium, a part evaporates into water vapor, and the rest returns to the water tank 15. When the cooled steam passes through the finned heat exchange tube 12 from the cooled steam inlet main pipe 14, it is initially cooled by air and then enters the cooled steam heat exchange main pipe 11, and then evaporatively cools through the tube bundle 10 and spray water, and then collects Get back in the operating system after returning to the jellyfish pipe 9. When the weather is severe cold, the shutter 13 at the air inlet can be closed, and the water in the circulating cooling water system can be completely drained, so as to avoid equipment damage caused by freezing of the cooling water system due to overcooling. The spray water finned heat exchange tube 3 and the finned heat exchange tube 12, the base tube is a common steel-aluminum composite flat tube with a width of 160-240 mm, a height of 10-20 mm, and a wall thickness of 1-1.5mm. Serpentine fins at equal intervals are arranged on the two outer surfaces of the base tube, the height of which is 12-20 mm, and the distance between adjacent fins is 5-10 mm. In the present invention, the spraying part and the air cooling part are arranged in steps, so as to prevent the water outlet from the spraying device from directly washing the finned heat exchange tube 12 at the air inlet, causing fouling or corrosion.

Claims (2)

1. A water-saving evaporative cooling device, including a cooler bracket, an axial flow fan (1) is arranged on the upper end of the cooler bracket, and louvers (13) are arranged on the side of the cooler bracket, and inside the cooler bracket are respectively There are cooled steam inlet main pipe (14), cooled steam heat exchange main pipe (11) and return water main pipe (9), which is characterized in that the cooled steam inlet main pipe (14) exchanges heat with the cooled steam Finned heat exchange tubes (12) are connected between the main tubes (11), and cooling tube bundles (10) are connected between the cooled steam heat exchange main tubes (11) and the return water main tubes (9). 10) is provided with a spray pipe (5), above the spray pipe (5) is provided with a first-stage water collector (4), and above the first-stage water collector (4) is provided with a spray Spraying fin heat exchange tubes (3), a second-stage water collector (2) is arranged above the spray water fin heat exchange tube (3), and a second-stage water collector (2) is arranged above the second-stage water collector (2) There is an axial flow fan (1), the spray water finned heat exchange tube (3) is connected with the spray tube (5), and a water tank (15) is arranged under the cooling tube bundle (10), and the water tank (15) A water delivery pipe (16) is connected to the spray water fin heat exchange tube (3), and a circulating water pump (8) is arranged on the water delivery pipe (16). 2. A water-saving evaporative cooling device according to claim 1, characterized in that a water processor (6) and a valve (7) are respectively provided on the water delivery pipe (16).