| 摘要 |
PURPOSE: A rapping control unit of pulse-jet filter system is provided, which can prevent dust from being adhered on adjacent filter cartridge by changing rapping interval and time. CONSTITUTION: The system comprises a programmable logic controller(2), a solenoid valve(4) and a signal transferring part(6). Compressed air is ejected to filter bag of a pulse-jet bag filter. The rapping interval and time is controlled by PLC and ejection is actuated by the solenoid valve(4). The rapping sequence is expressed as follows: (k+1) multiplied by n minus k, where k is positive numbers as 1,2,3 expressing example numbers and n are every other raw numbers.
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