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1. 发明专利

JPS63270592A FRESH WATER GENERATOR BY REVERSE-OSMOSIS MEMBRANE MODULE 失效
公开(公告)号：JPS63270592A
公开(公告)日：1988-11-08
申请号：JP10711987
申请日：1987-04-30
申请人： EBARA CORP
发明人： MAJIMA ETSUYO , TANIGUCHI SHIN , WATANABE SHINJI , OKAZAKI HARUO
IPC分类号： C02F1/44 , B01D61/12
摘要： PURPOSE:To eliminate the need for a conductometer and to facilitate the production of the title fresh water generated by a reverse-osmosis membrane by providing a central processing unit for calculating an osmotic pressure from the measured values of the flow rate, pressure, and liq. temp. CONSTITUTION:Supply water is forced into the reverse-osmosis membrane module 18 by a water supply pump 14, and filtered into permeated water (fresh water) and concd. water (concn. brine). The concd. water is discharged through an outlet valve 28. The flow rate and pressure of the supply water at two operation points of such a fresh water generator are measured by a measuring means 20, the flow rate and temp. of the permeated water are measured by a measuring means 24, and the concd. water is measured by a measuring means 30 respectively. The measured values are inputted to the central processing unit 38 (CPU), the osmotic pressure is calculated from the measured values, and a control signal is outputted to an operation control means based on the numeric values for the calculated osmotic pressure. The operation control means is operated in response to the control signal, and the opening degree of the valves 16 and 18 respectively for supply water and concd. water or the number of revolutions of a motor 12 for the supply water pump 14 is controlled.

2. 发明专利

JPS61157306A METHOD FOR WASHING HOLLOW YARN MEMBRANE 失效
公开(公告)号：JPS61157306A
公开(公告)日：1986-07-17
申请号：JP27433084
申请日：1984-12-28
申请人： EBARA CORP
发明人： MARUYAMA SHINSAKU , INO TAKAO , HOSHINO NORIO , OKAZAKI HARUO
IPC分类号： B01D63/04
摘要： PURPOSE:To enable the washing of a hollow yarn membrane even at the stop period of filtering and during filtering operation, by withdrawing a filtered substance released by vibration due to external force from a liquid withdrawal port separately provided to the outside part of a hollow yarn membrane. CONSTITUTION:When the amount of a filtered substance adhered to a hollow yarn membrane became much by filtering waste water containing a suspended substance from a waste water supply tank 1 by a hollow yarn membrane module 4, valves 5, 18 are opened and air is supplied from a compressed air supply pipe 12 to impart vibration to the hollow yarn membrane to release the sedimented filtered substance. The released filtered substance is withdrawn to a high conc. waste liquidstorage tank 7 as the high conc. waste liquid of the suspended substance from a washing solution withdrawal pipe 9 to be separately treated. During this time, the washing of the hollow yarn membrane is performed while usual filtering is continued. A valve 4 of a treated liquid withdrawal pipe 8 is closed at the stop time of filtering operation to perform the same operation. After vibration was imparted to the hollow yarn membrane, air is withdrawn from the washing solution withdrawal pipe 9 along with the washing solution.

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