Automatic Control Method of Continuous Operation of Ultrafiltration Membrane for Alkali Cleaning Solution Reprocessing

摘要

The present invention relates to an apparatus and a method for monitoring the flow rate of a filtrate in a filtration material treatment facility to selectively clean an ultrafiltration membrane for as many filtration membrane modules as needed in the entire filtration membrane, And an automatic control method for continuous operation of the ultrafiltration membrane for treatment.;The automatic control method for continuous operation of the filtration membrane of the present invention is provided in a recovery pipe section 205 for introducing the filtrate filtered from each of the filtration membrane modules 208 and 210 constituting the filtration membrane group 2 into the circulation tank 7 Detects a filtration membrane module in which the flow rate of the filtrate from the filtration membrane module sensed by the flow rate sensing means 6 has dropped below a reference value and the filtration membrane module sensed by the flow rate sensing means 6 to be below the reference value The filtration fluid flow direction is changed, and the pressure of the filtrate is regulated to be supplied to the selected filtration membrane module for backwashing.;In the present invention, the filtration membrane group (2) comprises a plurality of filtration membrane modules (208, 210) comprising a plurality of ultrafiltration membrane units connected in parallel so as to select a filtration membrane module having a filtrate flow rate equal to or lower than a reference value, The filtration operation direction can be periodically switched in the forward or reverse direction so as to improve the filtration capability of the ultrafiltration membrane.