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Improve the reliability of axial flow fan Fan installation attention

Release Time：2021-07-20

The type of power station boiler fan is generally centrifugal, static blade adjustable axial flow and dynamic blade adjustable axial flow fan, should be based on the specific use of the occasion, by technical and economic comparison to determine the fan type.
Project Centrifugal Static Shaft Flow Shaft Flow Structure Complexity Low Medium and High Adaptability to Medium Dust Content Good Medium Difference Comparable Operating Efficiency Low Medium and High Comparable Equipment Price Low Medium and High Reliability Senior high school Low.
When selecting the axial flow fan, the design point should fall on the curve with the highest efficiency, and the moving blade angle of the axial flow fan should be opened 10 ° ~ 15 ° on this basis. In this way, even if the unit is operated under the rated condition, the fan can still operate in the highest efficiency area.
For coal-fired boilers, due to the high circumferential speed of the adjustable blade axial flow fan, considering the wear problem, it is appropriate to use medium speed, not too high speed.
When selecting the parameters of the axial flow fan with adjustable moving blades, in addition to giving the margin according to the relevant regulations, it is also necessary to consider not only the maximum guaranteed operating point, MCR operating condition and 100% load operating condition, but also the ignition axial flow fan operating condition and the safe operation condition of the fan according to the actual situation of the power plant. The latter two operating conditions are often ignored and bring difficulties to the debugging and operation of the fan, therefore, special attention should be paid to the parallel design and operation of axial flow fans with adjustable moving blades.
Fan installation precautions.
A, the foundation of the fan is required to be horizontal and firm, and the foundation height is ≥ 200mm.
B, the fan and the air pipe are connected by hose (flexible material and non-burning), the length should not be less than 200mm, and the pipe diameter is the same as the inlet and outlet size of the fan. In order to ensure that the hose does not distort and deform during the operation of the axial flow fan system, the installation should be moderately tight. For the canvas hose installed at the suction end of the fan, it can be installed slightly tighter to prevent being sucked during the fan operation and reduce the cross-section size.
c. The steel support of the fan must be fixed on the concrete foundation. Rubber damping pads must be added between the steel support of the fan and the foundation. All fan and motor components are installed on the whole steel support. The steel floor frame is installed on the top of the foundation. On the damping pad, the damping pad is preferably a porous rubber plate.
Shandong Xingheng Environmental Technology Group Co., Ltd. is located in Luquantun Development Zone, Dezhou, Shandong, the hometown of FRP in China. The company has Grade II qualification for fire protection facilities engineering, Grade II qualification for construction mechanical and electrical installation engineering, Grade II qualification for environmental protection engineering, and safety production license. It is the first in the industry to pass ISO9001 quality management system certification, ISO14001 environmental management system certification, OHSAS18001 occupational health management system certification, and an axial fan invention patent, A fan utility model patent, environmental assessment, safety assessment, three simultaneous and other procedures are complete.