Abstract
In order to figure out stall solution of induced draft fans (IDFs) in power plants, the stall reason of IDFs with guide vanes in Tongchuan Power Plant of 600MW is investigated. By comparing hot test data of IDFs, we also find that the IDFs are of low efficiency and high power consumption in addition to the stall problem. Considering the above condition of the IDFs, two reasonable approaches are proposed to prevent stall and reduce power consumption of IDFs. With the hot test of reformation results, it is found that the reformation scheme of IDFs with adjustable rotor blades is much better with higher efficiency and safer characteristics. The work in this study has great significance and also provides practicable ways for stall-preventing, energy-saving and cost-reducing of power plants.
Highlights
Huaneng Tongchuan No.1 and No.2 Power Plants in China, originally equipped axial induced draft fans (IDFs) with adjustable guide vanes, are coal-fired generating units of 600MW
In 2010, the energy-saving and stall diagnosis on IDFs in Huaneng Tongchuan power plant was conducted by Zheng Jin [2]
More and more 1-stage axial fans with adjustable guide vanes have been reformed into 2-stage axial fans with adjustable rotor blades for higher pressure, higher efficiency and better anti-stall performance
Summary
Huaneng Tongchuan No. and No. Power Plants in China, originally equipped axial induced draft fans (IDFs) with adjustable guide vanes, are coal-fired generating units of 600MW. With the development of environmental protection and energy-saving policy in China, a lot of axial fans with adjustable vanes need to be reformed for higher pressure, higher efficiency and better anti-stall performance. More and more 1-stage axial fans with adjustable guide vanes have been reformed into 2-stage axial fans with adjustable rotor blades for higher pressure, higher efficiency and better anti-stall performance. The description of reconstruction or reformation scheme is not clearly given For this reason, two feasible solutions, the reformation schemes of IDFs with guide vanes and the one with adjustable rotor blades are offered to solve stall problem and improve efficiency. Through the final reconstruction results, it was found that reformation scheme of IDFs with adjustable rotor blades worked well on satisfying the needs in solving stall problem, improving operating efficiency and reducing power consumption significantly
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