The main purposes of factory chimneys include cooling and exhausting flue gas. In power plants, chimneys usually refer to cooling towers, also known as "hyperbolic cooling towers". The main function of a cooling tower is to reduce the temperature of the machine by inhaling outside air and exchanging heat with the machine inside the factory. Specifically, the cooling tower introduces outside air into the machine through an exhaust pipe, uses low-temperature air to exchange heat with the high-temperature gas inside the machine, generates steam and takes away heat to achieve a cooling effect.
In addition, cooling towers can also realize the recycling of water resources. During the cooling process, water is sprayed to form steam and then discharged, while unused water is cooled again and continuously recycled. This design not only solves the problem of water waste caused by continuous water addition during coal burning in factories, but also improves the utilization efficiency of water resources.
Although the main function of cooling towers is cooling, they are different from traditional chimneys in appearance.