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    • 77. 发明专利
    • CONSTANT QUANTITY EXHAUSTING METHOD FOR PULVERIZED/ GRANULAR SUBSTANCE
    • JPS62175327A
    • 1987-08-01
    • JP1478586
    • 1986-01-28
    • BABCOCK HITACHI KK
    • KAWADA HIDETO
    • B65G53/48B65G65/48
    • PURPOSE:To provide constant quantity exhaustion of pulverized substance by holding steady the pressure in a constant quantity storing hopper, holding steady the level of the pulverized substance in the hopper, and allowing an agitating vane to make the substance density steady. CONSTITUTION:A control box 12 is installed, into which are fed a pressure signal for the upper space of a constant quantity exhaust machine 4 and a pressure signal for the upper space of a storing hopper, followed by comparison of these signals with the setting value stored in said control box 12, whereupon control is made so as to put the upper space pressure of said constant quantity exhaust machine 4 identical to the setting value. In this control, an atmospheric release valve 21 installed on a line 12a is opened when the upper space pressure of said storing hopper 1 is higher than the set pressure value for the upper space of the constant quantity exhaust machine 4. At the same time, a control is made so as to throttle a valve 22 for aeration air. If the pressure in the constant quantity exhaust machine 4 is higher than the upper space pressure of storing hopper 1, a valve 14 makes exhaustion to the upper space of storing hopper 1.