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11. 发明专利

JPH07299500A PRODUCTION OF INORGANIC FLOCCULANT-MIXED SLUDGE AND DEVICE THEREFOR 失效
公开(公告)号：JPH07299500A
公开(公告)日：1995-11-14
申请号：JP4550895
申请日：1995-03-06
申请人： NGK INSULATORS LTD , NICHIGAI KANKYO SERVICE KK
发明人： NAKAJIMA SEIJI , SUZUKI SHIGEYOSHI
IPC分类号： B01D21/01 , B01D21/24 , B01F3/12 , B01F5/00 , B01F5/04 , C02F11/00 , C02F11/14
摘要： PURPOSE:To provide a method and device capable of directly mixing the powder of an inorganic flocculant such as slaked lime, quick lime with a sludge without using water. CONSTITUTION:The inorganic flocculant powder introduced from a storage tank 1 of the inorganic flocculant powder is supplied to the center part of an ejector type or a line mixer type mixer 3 and the flowable sludge introduced from a sludge storage tank 2 is supplied from the periphery of the mixer 3 and both are directly mixed. The cost for city water is reduced since water for previously dissolving the inorganic flocculant powder is unnecessary and the load of a dehydrator is reduced.

12. 发明专利

JPH0533384A STORAGE TANK FOR SEWAGE IMPURITY 失效
公开(公告)号：JPH0533384A
公开(公告)日：1993-02-09
申请号：JP21156091
申请日：1991-07-29
申请人： NGK INSULATORS LTD , NICHIGAI KANKYO SERVICE KK
发明人： USAMI MITSUMASA
IPC分类号： B01D29/00 , B01D35/027 , E03F5/10
摘要： PURPOSE:To prevent clogging, and to remove moisture even the upper section of sewage impurities such as excrement residue. CONSTITUTION:A sideditch 2 for drainage is concavely provided on a base in a tank 1. Hollow bodies 4, 5 with a large number of weep holes are erected in the tank, and the lower ends of the hollow bodies are faced to the sideditch 2. The moisture of sewage impurities such as excrement residue, etc., is removed from the hollow bodies 4, 5, and discharged to the outside from the sideditch 2.

13. 发明专利

JPS6447497A DEVICE FOR DETECTING CLOGGING DEGREE OF DIFFUSER 失效
公开(公告)号：JPS6447497A
公开(公告)日：1989-02-21
申请号：JP20140487
申请日：1987-08-12
申请人： NGK INSULATORS LTD , NICHIGAI KANKYO SERVICE KK
发明人： KOBAYASHI KOJI , IZUMI NAOE
IPC分类号： C02F3/20
摘要： PURPOSE:To detect the clogging of a diffuser in an installed state by dipping a bubbler pipe into an aeration tank to almost the same depth as the diffuser, and measuring the differential pressure between the air supply lines for the bubbler pipe and diffuser and the air flow rate of the air diffuser. CONSTITUTION:Compressed air is supplied to the diffuser 2 from a blower 3 through an air supply line 4 to carry out aeration, and a small amt. of air is simultaneously ejected from the tip of the bubbler pipe 5 through a line 6 into water. The differential pressure at this time between both air supply lines 4 and 6 is detected by a differential pressure transmitter 7. Since the flow rate of the air to be sent to the diffuser 2 changes sharply, the value measured by an air flowmeter 8 and the differential pressure are inputted to a computing element 9. The obtained air flow rate is expressed in terms of a value at a reference air flow rate, the discharge resistance to the air ejected from the diffuser 2, namely the variations in the differential pressure, is measured, and the clogging degree of the diffuser 2 can be obtained with the lapse of time.

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