How to design spray water for closed cooling towers
How to design spray water for closed cooling towers
Apr 16, 2025
The closed cooling tower includes integrated devices such as the spray system, exhaust system, and cooling system. How to make each component most efficient should be determined through various experimental measured data and calculations.
The working principle of the closed cooling tower is to circulate the working fluid (pure water or other liquid) in the coil of the closed cooling tower, and the heat of the working fluid is dissipated through the coil into the spray water flowing through the outer surface of the coil. At the same time, the air outside the unit enters from the air inlet grille on the chassis, opposite to the flow direction of the water, and flows upward through the coil. A small part of the water evaporates and absorbs heat, and the hot and humid air is discharged into the atmosphere by the ventilator at the top of the cooling tower. The rest of the spray water falls into the bottom water tray, which is recirculated by the spray pump to the water distribution system and then back to the coil.
The spray system of the cooling tower is an important component of the closed cooling tower. At present, the spray system mostly adopts the method of connecting the spray straight pipe with the water inlet. The spray system has the problems of large spray water flow at the front end, small spray water flow at the rear end, uneven water spray, and poor cooling effect.
To achieve the above-mentioned purpose, the utility model provides a new type of composite flow cooling tower spray system, including a water inlet and a spray pipeline, characterized in that the spray pipeline includes a spray straight pipe, a first spray circuit and a second spray circuit, and the rear end of the spray straight pipe, the first spray circuit and the second spray circuit are connected by a combination of a four-way pipe fitting and a three-way pipe fitting, and the water inlet, the front end of the spray straight pipe, the first spray circuit and the second spray circuit are connected by two groups of four-way pipe fittings.
Among them, the corners of the first spray circuit and the second spray circuit are connected by a 90° elbow.
Among them, the spray straight pipe, the first spray circuit and the second spray circuit are evenly provided with nozzles.
Compared with the prior art, the utility model has the following beneficial effects:
The novel composite flow cooling tower spray system adopts a double loop design, the spray water flow is diverted by the front four-way pipe fitting to flow backward, and the water flows to the rear end through the rear three-way pipe fitting in the reverse direction, so that the pressure drop of the water flow at the rear end is not too large, so that the front and rear water flow of the entire spray system is uniform.
As shown in Figure 1-2, a novel composite flow cooling tower spray system includes a water inlet 1 and a spray pipeline, wherein the spray pipeline includes a spray straight pipe 2, a first spray circuit 3 and a second spray circuit 4, and the rear end of the spray straight pipe 2, the first spray circuit 3 and the second spray circuit 4 are connected by a combination of a four-way pipe fitting 5 and a three-way pipe fitting 6, and the water inlet 1, the front end of the spray straight pipe 2, the first spray circuit 3 and the second spray circuit 4 are connected by two sets of four-way pipe fittings 5.
Among them, the corners of the first spray circuit 3 and the second spray circuit 4 are both connected by 90° elbows. Spray heads are evenly arranged on the spray straight pipe 2, the first spray loop 3 and the second spray loop 4.
When the spray system of the cooling tower is working, the spray water flow is diverted by the front four-way pipe fitting 5 to flow backward, and the water flows to the rear end through the rear three-way pipe fitting 6 in the reverse direction, so that the water flow pressure at the rear end does not drop too much, so that the front and rear water flow of the entire spray system is uniform.
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