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Impeller for centrifugal fan of 600MW supercritical circulating fluidized bed

A technology of circulating fluidized bed and centrifugal fan, which is applied in the direction of mechanical equipment, machine/engine, liquid fuel engine, etc. It can solve the problems of low power generation efficiency and large energy consumption, and achieve the effects of increased life, high speed and large diameter

Inactive Publication Date: 2013-05-08
NANTONG DART POLLRICH FAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the linear speed of centrifugal fan impeller is generally less than 130m / s, the power generation efficiency is low, and the energy consumption is large

Method used

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  • Impeller for centrifugal fan of 600MW supercritical circulating fluidized bed
  • Impeller for centrifugal fan of 600MW supercritical circulating fluidized bed

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Experimental program
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Embodiment Construction

[0018] Such as figure 1 , 2 As shown, a 600MW supercritical circulating fluidized bed centrifugal fan impeller includes a disc 4, a blade and a wheel cover 7. The impeller is an impeller made of S690QL steel, and the blade includes a main blade 2 and is located on the main blade. The auxiliary blade 3 at the root of the blade 2, the main blade 2 and the auxiliary blade 3 have different thicknesses, and the main blade 2 and the auxiliary blade 3 are welded to form a whole blade. Thick disc, the central part of the disc 4 is thicker than the peripheral part; one end of the entire blade is welded to both sides of the disc 4 symmetrically, and two wheel covers 7 are symmetrically connected to the other end of the entire blade. The outer side of 7 is welded with a first reinforcement ring 1 and a second reinforcement ring 5, and the first reinforcement ring 1 and the second reinforcement ring 5 are mutually formed at 90°; the two ends of the impeller are provided with an air inlet...

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Abstract

The invention discloses an impeller for a centrifugal fan of a 600MW supercritical circulating fluidized bed. A dual-air inlet mode is adopted for the impeller. The impeller is made from a strong-strength structural steel. Variable thickness blades are adopted. A saw toothed wheel disc is adopted, and is a variable thickness wheel disc. Forged inlet reinforcing rings are welded at air inlets of wheel covers. Two reinforcing rings at an angle of 90 degrees are welded outside the wheel covers. The impeller has a great diameter, high rotating speed and strong strength, and can be used for manufacturing a primary fan and a secondary fan of the 600MW circulating fluidized bed with high ventilation capability and high pressure.

Description

technical field [0001] The invention relates to the field of circulating fluidized bed centrifugal fans, in particular to an impeller for a 600MW supercritical circulating fluidized bed centrifugal fan. Background technique [0002] Under the background of long-term energy shortage and higher environmental protection emission requirements, circulating fluidized bed power plant units can burn low-quality coal, coal gangue, coal washing slime, etc., and can achieve relatively low-temperature combustion, which is in line with the national industrial development orientation and belongs to the National Development and Reform Commission. Development catalog items. [0003] The impeller is the key rotating part of the centrifugal fan. The impeller is usually composed of a disc, blades, and a wheel cover. The blades are welded to the wheel disc, and the wheel cover is welded to the blades. The diameter and speed of the impeller determine the ventilation capacity of the centrifugal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/28
Inventor 周淑云
Owner NANTONG DART POLLRICH FAN