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1.发明申请公开(公告)号：US20200171440A1
公开(公告)日：2020-06-04
申请号：US16088337
申请日：2016-09-12
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Keijirou TADA
Abstract: A hollow fiber membrane filtration device includes a hollow fiber membrane module including a vessel having a treated water outlet and a concentrated water outlet; a plurality of hollow fiber membranes each of which separates raw water into permeated water and concentrated water, and is vertically disposed in the vessel; an upper end fixing member that fixes upper end parts of the hollow fiber membranes and is disposed at an upper part in the vessel; a permeated water chamber that is formed on an upper side of the upper end fixing member and communicates with an interior of each of the hollow fiber membranes; and a water conduit through which the raw water is supplied into the vessel. The water conduit vertically extends on a lower side of the upper end fixing member, and a plurality of ejection holes is provided on a side peripheral surface to eject raw water.
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公开(公告)号：US20230227342A1
公开(公告)日：2023-07-20
申请号：US17928929
申请日：2021-05-18
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Keijirou TADA , Muneaki MATSUDA
Abstract: The water treatment apparatus of the present invention comprises a flocculation part into which water to be treated is introduced, at least two flocculant adding devices installed so that different flocculants can be added to the flocculation part, one or two or more water quality measurement devices for measuring the quality of the water to be treated, and a controlling part for issuing, on the basis of the measurement result from the water quality measurement device(s), a command relating to whether addition of the flocculants to the corresponding flocculant adding device is required or not and to the added amounts of the flocculants, wherein at least one of the flocculant adding devices is an auxiliary flocculant adding device.
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3.发明申请公开(公告)号：US20200016544A1
公开(公告)日：2020-01-16
申请号：US16497476
申请日：2017-09-15
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Keijirou TADA
Abstract: A hollow fiber membrane filtration device includes a hollow fiber membrane module including a vessel that includes a treated water outlet and a concentrated water outlet, hollow fiber membranes, an upper end fixing member that fixes upper end parts of the hollow fiber membranes, a permeated water chamber that is formed on an upper side of the upper end fixing member, a water conduit through which raw water is supplied into the vessel, and a diffusion tube that is provided on a lower side of the hollow fiber membranes. A plurality of ejection holes are provided on a side peripheral surface of the water conduit. A raw water pipe and gas introduction device are connected with the water conduit. A drainage port is provided at a lower part of the vessel.
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公开(公告)号：US20180370825A1
公开(公告)日：2018-12-27
申请号：US16064860
申请日：2016-09-20
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Yasuhiro OOI , Keijirou TADA , Akihiro FUJII
Abstract: Provided are a method and an apparatus for clarifying industrial water that enable industrial water to be clarified to a high degree with a small amount of coagulant instead of an inorganic coagulant, such as PAC, aluminum sulfate, or ferric chloride, which need to be used in a large amount for clarifying industrial water and are capable of producing treated water having qualities particularly suitable for an RO membrane treatment. The method for clarifying industrial water includes adding a melamine-formaldehyde resin acid colloidal solution to industrial water in order to coagulate the industrial water and subsequently filtering the coagulated water. The coagulated water may be directly filtered with a pressure or gravity filtration device, or with a microfiltration or ultrafiltration membrane module, without being subjected to solid-liquid separation using a sedimentation or floatation separation device prior to the filtration treatment.
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