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Gas current classifying separator

  • US 5,165,549 A
  • Filed: 10/07/1991
  • Issued: 11/24/1992
  • Est. Priority Date: 02/09/1988
  • Status: Expired due to Term
First Claim
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1. A separator for classifying powder with air current, comprising:

  • a classifying chamber and an introducing means for introducing powder into said classifying chamber;

    a powder feeding inlet for feeding powder formed at an upper portion of said classifying chamber;

    a cone-shaped classifying plate with a high central portion disposed at a lower portion of said classifying chamber;

    a coarse powder discharging outlet for discharging a coarse powder group disposed at a lower outer periphery of said classifying plate;

    a fine powder group discharging outlet for discharging downwardly a fine powder group disposed at a central portion of said classifying plate;

    gas inflowing means for dispersing powder by whirling gas provided at an upper outer periphery of said classifying chamber wherein air flows into said classifying chamber through an opening area in said gas inflowing means to disperse and accelerate the powder; and

    a gas inflow inlet for creating a whirling current of gas for classifying powder provided at the lower portion of said classifying chamber, wherein air flows into said classifying chamber through an opening area in said gas inflow inlet to classify powder in the course powder group and the fine powder group, whereinwhen the total sum of the opening area of said gas inflowing means for introducing gas into said classifying chamber at the upper portion of said classifying chamber is represented by A and the total sum of the opening area of said glass inflow inlet for introducing gas for classifying powder at the lower portion of said classifying chamber is represented by B, and said total sum A and said total sum B satisfy the following formula;

    
    
    space="preserve" listing-type="equation">≦

    A/B≦

    20, and the flow velocity of the gas flowing from said gas inflowing means at the upper portion of said classifying chamber is substantially equal to or slower than the velocity of the gas flowing from said gas inflow inlet at the lower portion of said classifying chamber.

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