Today, Shengyuan Technology will share with you the application of fan transformation in cement production lines:
The outlet pressure of the primary fan in the cement production line is controlled at around 56kPa for a long time. The flame is not strong and the working conditions are not ideal. The air conditioning of the coal pipe is limited, and there is often severe flying sand in front of the kiln. The temperature at the kiln tail is high, the quality of the clinker is poor, and the preheater system is severely crusted and blocked frequently. The negative pressure fluctuation at the kiln head is large, and the power consumption of the main fan is as high as 110kW.
After analysis, it is believed that the high amount of coal and insufficient combustion of coal powder are the main reasons for the above problems. Incomplete combustion of coal powder can lead to a severe reducing atmosphere in the kiln. FeO reduced from Fe2O3 is prone to form low melting point compounds with other oxides. The formed furnace and auxiliary kiln skins continue to fall off, causing chaos in the thermal system.
The cement plant first made improvements in batching and process operations. Insufficient air pressure, poor dispersion of coal powder, and poor air coal mixing are the fundamental reasons for insufficient coal combustion. Therefore, it is necessary to increase the air outlet of the fan. After comparing and measuring the wind pressure, the cement plant decided to adopt air suspension fans for energy-saving renovation.
During the fan renovation process: remove the backup fan from the original main fan, install the air suspension fan on the original fan base, remove the original backup fan duct, and carry out the overall design and installation of the suspension fan outlet duct. The air suspension fan must maintain a high speed of 24000r/min during startup, and the speed must be controlled between 24000 and 27000 r/min during operation. Therefore, increase the residual exhaust pipe and bypass pressure relief pipe of the air suspension fan to exhaust the air. Pipeline valve. Both air to air exhaust pipes are equipped with mufflers to reduce noise pollution, and the original main fan is used as a backup fan for the air suspension fan.
The improved air suspension centrifugal blower is based on dynamic pressure air bearing technology. With the support of high-speed fluid machinery, it adopts dynamic pressure air bearings, high-speed permanent magnet motors, high-efficiency impellers, and automatic system design, perfectly solving the huge energy loss and noise caused by friction in mechanical problems. It can provide sufficient air pressure and wind speed for the kiln burner. The air suspension fan adopts an integrated compact design, which is easy to install and operate. It is characterized by advanced technology, reliable performance, simple structure, small size, energy conservation, environmental protection and convenient maintenance.
