The main functions of factory chimneys include the following aspects:
Ventilation and emission
A chimney is a structure that provides ventilation for hot flue gas or smoke from a boiler, furnace or fireplace. It transports flue gas to the external environment through the chimney effect, ensuring smooth gas flow, while sucking in air to promote combustion.
Cooling function
In power plants, the common "big chimney" is actually a hyperbolic cooling tower, whose main function is to cool the machines in the factory. By introducing cold air from the outside to exchange heat with the high-temperature gas in the machine, the temperature of the machine is reduced, thereby achieving a cooling effect.
Environmental protection and pollution control
The chimney promotes the full combustion of coal by discharging the gases and smoke produced by combustion into the high altitude, thereby reducing the pollution of smoke to the atmospheric environment. In addition, a sufficiently high chimney can allow the chemicals in the air to partially or completely neutralize themselves before reaching the ground level, reducing the impact on the surrounding environment.
Resource recycling
Cooling towers not only have cooling functions, but also can realize the recycling of water resources. By reintroducing cooled water into the coal burning process, the waste of water resources is reduced.
History and Changes
In the past, factory chimneys were often accompanied by thick black smoke, but with the advancement of environmental protection technology, modern chimneys mainly emit water vapor, reflecting the progress of industrial environmental protection practices.