The working principle of factory chimney mainly includes the following aspects:
The working principle of cooling tower: In thermal power plants, chimneys are actually cooling towers, also known as hyperbolic cooling towers. The cooling tower draws in outside air through the exhaust pipe and introduces it into the machine. Since the machine produces high-temperature gas during operation, the cooling tower introduces cold air to exchange heat with the high-temperature gas, so that the high-temperature gas is cooled and discharged as water vapor. The design of the cooling tower enables it to recycle water resources, and the cooled water is used again in the coal burning process.
The working principle of blast furnace: In steel mills, chimneys are actually blast furnaces. Blast furnaces refine iron ore through reduction reactions. In the blast furnace, iron ore, coke and limestone react chemically at high temperatures. The combustion of coke produces carbon monoxide, which reacts with iron oxide to produce iron and carbon dioxide. The design of the blast furnace is very precise, including the furnace body, furnace top, tuyere and blower, to ensure that the temperature in the furnace is balanced and the overall efficiency is improved.
Chimney effect: The working principle of a chimney also involves the chimney effect. After the air at the bottom of the chimney is heated, its density decreases and it floats upward, forming a vacuum. Fresh air from the surrounding area is sucked in, increasing the oxygen required for combustion and promoting combustion. The higher the chimney, the greater the pressure difference and the stronger the suction, which helps to discharge smoke faster and enhance the combustion effect.