Exhaust gas treatment fans are commonly used and essential equipment in industries such as chemical engineering.Exhaust gas treatment fanWith a high-speed rotating impeller, it can accelerate gas. Now, let's learn about the working principle of exhaust gas treatment fans!

　　The exhaust gas treatment fan is based on the principle of converting kinetic energy into potential energy. In a single-stage centrifugal fan, gas enters the impeller axially, and as the gas flows through the impeller, it changes radially and enters the diffuser. In the diffuser, the gas changes direction, is accelerated by the high-speed rotating impeller, and then slows down or changes direction, converting kinetic energy into potential energy (pressure). The increase in pressure mainly occurs at the impeller, and in multi-stage centrifugal fans, the gas flow enters the next impeller through a recirculator, generating higher pressure.

　　Exhaust gas treatment fanIt relies on the input mechanical energy. Centrifugal fans are widely used for ventilation, dust removal, and cooling in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings; for ventilation in boilers and industrial furnaces; for cooling and ventilation in air conditioning equipment and household appliances; for increasing gas pressure, and for mechanically transporting gas. They are dynamic hydraulic machines used for drying grains, selecting wind tunnel sources, and inflating and propelling hovercraft.

　　The exhaust gas treatment fan is based on the principle of converting kinetic energy into potential energy. In a single-stage centrifugal fan, gas enters the impeller axially, and as the gas flows through the impeller, it changes radially and enters the diffuser. In the diffuser, the gas changes direction, is accelerated by the high-speed rotating impeller, and then slows down or changes direction, converting kinetic energy into potential energy (pressure). The increase in pressure mainly occurs at the impeller, and then during the diffusion process. In multi-stage centrifugal fans, the increase in the cross-sectional area of the duct leads to a decrease in gas flow speed, and this deceleration converts kinetic energy into pressure energy. The gas flow enters the next impeller through a recirculator, generating higher pressure.

　　The exhaust gas treatment fan is essentially a variable flow constant pressure device. Due to internal losses, the actual characteristic curve is curved. The pressure generated by the centrifugal fan is greatly affected by changes in intake temperature and density. For a given air supply volume, the pressure generated at a lower supply temperature (lower air density) is lower. For a given pressure and flow characteristic curve, there are power and flow characteristic curves. At a constant speed, the theoretical pressure-flow curve of the centrifugal fan should be a straight line. When the constant speed fan operates, for a given flow rate, the required power increases as the supply temperature decreases.

　　The working principle of the exhaust gas treatment fan is fundamentally the same as that of a turbo compressor. Exhaust gas treatment fans can be made in both right-hand and left-hand rotation types. Viewed from the front of the motor: if the impeller rotates clockwise, it is called a right-hand fan; if it rotates counterclockwise, it is called a left-hand fan. Both types have low gas flow rates and minor pressure changes, and generally, the change in gas specific volume does not need to be considered, treating the gas as an incompressible fluid. The exhaust gas treatment fan relies on the input mechanical energy to increase gas pressure and is a dynamic hydraulic machine for transporting gas.

　　Exhaust gas treatment fans are widely used for ventilation, dust removal, and cooling in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings. The centrifugal fan is essentially a variable flow constant pressure device, and at a constant speed, the theoretical pressure-flow curve of the exhaust gas treatment fan should be a straight line. Due to internal losses, the actual characteristic curve is curved.Exhaust gas treatment fanThe pressure generated is greatly affected by changes in intake temperature and density. For a given air supply volume, the pressure generated at a lower supply temperature (lower air density) is lower. Ventilation in boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying grains, selecting wind tunnel sources, and inflating and propelling hovercraft, etc. For a given pressure and flow characteristic curve, there are power and flow characteristic curves. When the constant speed fan operates, for a given flow rate, the required power increases as the supply temperature decreases.