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1. 发明专利

JPH09220696A DUST REMOVING DEHYDRATER 失效
公开(公告)号：JPH09220696A
公开(公告)日：1997-08-26
申请号：JP4815696
申请日：1996-02-09
申请人： HITACHI KIDEN KOGYO KK
发明人： HIRAI ATSUO , NAKAYAMA YOSHIO , SHIMADA EIJI
IPC分类号： B01D29/27 , B30B9/28
摘要： PROBLEM TO BE SOLVED: To raise the removing ratio of a solid waste from a solid foreign material, to surely dehydrate and dry, and to easily execute handling of after processing and processing of incinerating. SOLUTION: A circular cylinder screen 41 is arranged on the lower part of an inflow tank 1, a conveying cylinder 6 which has a conveying machine 7 in the inside and from whose upper part a foreign material is taken out is connected to the top end of the cylindrical screen 41. Then, a blast tube 9 to blow the drying air inside this conveying cylinder 6 is connected.

2. 发明专利

JPH03270798A WATER AREA PURIFYING APPARATUS 失效
公开(公告)号：JPH03270798A
公开(公告)日：1991-12-02
申请号：JP7025090
申请日：1990-03-20
申请人： HITACHI KIDEN KOGYO KK
发明人： SHIMADA EIJI , OSAGAWA HIDEMI
IPC分类号： C02F3/06 , B01D21/00 , B01D21/08 , B01F3/04 , C02F1/52 , C02F3/20 , C02F3/24 , C02F7/00
摘要： PURPOSE:To efficiently purify sewage by allowing a water pumping-up pipe fitted with a gathering duct for pumping up water mixed with fine air bubbles to be adjacent to a self-suction type aerator and suspending a treatment apparatus in the water area adjacent to the aerator and the water pumping-up pipe. CONSTITUTION:An aerating water pumping-up means A is constituted of a self-suction type aerating stirrer 1 and a water pumping-up pipe 5 having a gathering duct 4 provided to the lower end thereof and the leading end of a vent pipe 2 is opened to the atmosphere and the water in a water area is stirred by revolving a screw 3 to generate a water stream and negative pressure is also generated in the leading end zone of the screw 3. The air in a hollow shaft is sucked by this negative pressure and the open air is mixed with and discharged in the water area as fine air bubbles. The aerating stirrer 1 is fixed on the base stand 6 arranged to the bottom part of the water area or provided in a movable manner and the water pumping-up pipe 5 is also supported on the base stand 6 through a stay.

3. 发明专利

JPH02280894A BATCHWISE WATER TREATMENT APPARATUS 失效
公开(公告)号：JPH02280894A
公开(公告)日：1990-11-16
申请号：JP10425989
申请日：1989-04-24
申请人： HITACHI KIDEN KOGYO KK
发明人： ITO HAJIME , SHIMADA EIJI , MIZUTA KOICHI
IPC分类号： C02F3/12 , C02F3/34
摘要： PURPOSE:To prevent the accumulation of sludge on a bottom part during biological treatment by constituting a batchwise water treatment apparatus by arranging a contaminate concn. and storage tank inside a biological treatment tank formed into a double circular shape and having an aeration device provided thereto on the outside to integrate the same with said treatment tank. CONSTITUTION:When a required amount of sewage is allowed to flow in a biological treatment tank 1 from an inflow pipe 5 and an aerator 3 is operated, sewage is stirred and aerated to be subjected to biological treatment for a predetermined time and, thereafter, the operation of the aerator 3 is stopped. By this method, the solid in sewage is also carried by a water stream to flow down and circulate in the tank at the time of the biological treatment due to the operation of the aerator but, when the aerator 1 is stopped to eliminate the generation of the water stream, the solid suspended in the sewage is settled to be separated from a supernatant liquid. The supernatant liquid is drained out of the tank 1 through a drain pipe 6 by opening a valve 7 and sterilized to be discharged to rivers or the sea.

4. 发明专利

JPH02174998A MIXING AERATOR FOR AERATION TANK 失效
公开(公告)号：JPH02174998A
公开(公告)日：1990-07-06
申请号：JP33169888
申请日：1988-12-28
申请人： HITACHI KIDEN KOGYO KK
发明人： ITO HAJIME , SHIMADA EIJI , MIZUTA KOICHI
IPC分类号： C02F3/20
摘要： PURPOSE:To stably, efficiently and uniformly aerate sewage by mounting screw type aerators adjustably in horizontal mounting angle so as to maintain the flow velocity on the inner peripheral side of the water path higher than on the outer peripheral side according to the shape and size of the endless water path. CONSTITUTION:The screw type aerator 2 is so constituted as to generate water flow by the rotation of a screw 2 and to suck the air through a hollow shaft 23 by utilizing the negative pressure at the front end of the screw 26 arising from the water flow, thereby supplying the air in the form of fine air into the sewage and to efficiently penetrate the bubbles in the water. The aerator 2 is mounted in the water path 13 by fixing a motor 22 to a mounting frame 21. The horizontal mounting angle of the aerator 2 is made adjustable and the angle thereof in the direction tangent to double circular aeration tanks 1 is made adjustable by means of a mounting angle adjuster 25. The flow velocity on the inner peripheral side of the circulating water path 13 is made higher than on the outer peripheral side by installing such aerators in such a manner that the horizontal mounting angle is directed inward and by operating the aerators.

5. 发明专利

JPH02174996A MIXER FOR SLUDGE OF AERATION TANK 失效
公开(公告)号：JPH02174996A
公开(公告)日：1990-07-06
申请号：JP33170088
申请日：1988-12-28
申请人： HITACHI KIDEN KOGYO KK
发明人： ITO HAJIME , SHIMADA EIJI , MIZUTA KOICHI
IPC分类号： C02F3/14 , B01F3/04
摘要： PURPOSE:To stably, efficiently and uniformly aerate sewage by installing 1 or >=2 flow regulating plates and/or mixing and stirring bars which change the flow direction of the sewage flowing in the water path in the circulating water path of an aeration tank. CONSTITUTION:The flow velocity is lower on the inner peripheral side of the water path and is higher on the outer peripheral side and swirling arises in some cases when the flow velocities at the respective points of the aerator are measured by subjecting an aerator 2 to a required operation. The flow regulating plates 3 are installed at one or >=2 points of the circulating water path so as to uniformize the water flow of the water path over the entire part of the water path in order to prevent the swirling. The flow regulating plates 3 are so installed as to change the water flow in the water path from the outer peripheral side to the inner peripheral side of the water path to increase the flow velocity on the inner peripheral side of the water path. The swirling is prevented in this way and since the sewage is uniformly mixed in the transverse direction of the water path, the sewage is stably, efficiently and uniformly aerated.

6. 发明专利

JPS57165023A MIXING MACHINE FOR SLUDGE 失效
公开(公告)号：JPS57165023A
公开(公告)日：1982-10-09
申请号：JP5212481
申请日：1981-04-06
申请人： HITACHI KIDEN KOGYO KK
发明人： SHIMADA EIJI , MUTOO EIICHI
IPC分类号： B01F5/00 , B01F5/06 , C02F11/00
摘要： PURPOSE:To mix sludge or the like certainly without using a mechanical stirring means by inserting short tubular blades of which bending directions are different into a pipe alternately and continuously. CONSTITUTION:Plural short blades 2, 3 bent to one direction are succeedingly arranged in a pipe having a desired diameter and a desired length in such a manner that bending directions therof are made different in the outflow sides of said blades alternately and continuously to constitute the mixing machine. When easily clogged sludge containing a fibrous substance or the like is treated by this mixing machine, the sludge or the like is mixed certainly and continuously wihtout using a mechanical stirring means and without generating clogging.

7. 发明专利

JP2003236578A AERATION AGITATOR 审中-公开
公开(公告)号：JP2003236578A
公开(公告)日：2003-08-26
申请号：JP2002036183
申请日：2002-02-14
申请人： HITACHI KIDEN KOGYO KK
发明人： OSAGAWA HIDEMI , OIDE KOSUKE , HIROSE KEISUKE , SHIMADA EIJI , IINUMA HAJIME
IPC分类号： C02F3/16 , B01F3/04 , B01F7/00 , B01F7/16
摘要： PROBLEM TO BE SOLVED: To provide an aeration agitator which can simply switch an aerobic operation and an anaerobic operation by driving individually a blade for aeration and a blade for agitation configured to be driven by an individual motor with simple construction. SOLUTION: In the aeration agitator which selectively agitates or aerates sewage by blades for aeration and for agitation attached to a rotary shaft rotationally driven by a motor, an agitation shaft 6 having the blade 7 for agitation attached to a lower end outer circumferential part and an aeration shaft 4 having the blade 8 for aeration attached to an outer circumference are concentrically arranged, and the agitation shaft 6 and the aeration shaft 6 are configured to be driven by the individual motors 3 and 10. COPYRIGHT: (C)2003,JPO

8. 发明专利

JPH0639210A SUPERNATANT DISCHARGE DEVICE 失效
公开(公告)号：JPH0639210A
公开(公告)日：1994-02-15
申请号：JP10400291
申请日：1991-02-08
申请人： HITACHI KIDEN KOGYO KK
发明人： SHIMADA EIJI , YOSHIDA TERUHISA
IPC分类号： B01D21/24 , C02F3/12
摘要： PURPOSE:To prevent sludge suspended on aeration from flowing in from an overflow weir and to surely discharge only a supernatant to stabilize water quality by installing the overflow weir higher than the level of the water in a water collecting container in the shape of a cap chamber and exhausting air in the water collecting container on discharging the supernatant. CONSTITUTION:A water collecting container 2 in the shape of a cap chamber is installed between both the right and left floats 1. An overflow weir 3 fitted to a drain pipe 4 is fixed inside the container and an expansion pipe 5 is fitted to the lower part of the drain pipe 4 and leads to outside the tank. On aeration, the sludge precipitated is hoisted but it does not flow in the drain pipe 4 because the overflow weir 3 is above the level of the water. After the aeration treatment is finished and the sludge has been precipitated, an exhaust blower 8 is operated on draining to exhaust air in the water collecting container 2. At this time, the level of the water in the water collecting container 2 is raised with the exhaust and then the supernatant flows into the drain pipe 4 from the overflow weir 3 to form a siphon, causing the supernatant to be continuously discharged from the overflow weir 3 through the drain pipe 4 even if an exhaust valve 7 and the blower 8 are stopped.

9. 发明专利

JPH02261595A METHOD FOR PURIFYING WATER IN CLOSED WATER AREA 失效
公开(公告)号：JPH02261595A
公开(公告)日：1990-10-24
申请号：JP8202289
申请日：1989-03-31
申请人： HITACHI KIDEN KOGYO KK
发明人： ITO HAJIME , SHIMADA EIJI , OSAGAWA HIDEMI
IPC分类号： C02F7/00 , C02F1/52 , C02F11/14
摘要： PURPOSE:To remove sludge and to obtain water appropriate for the living of organisms by separating sludge from water by settling, returning the supernatant water to the closed water area, flocculating the sludge, dehydrating the flocculated sludge, returning the desorbed water to a settling stage to remove the contaminant, agitating and aerating the water in the closed water area. CONSTITUTION:The desorbed water obtained from the dehydration stage is supplied to a flocculating and concentrating tank 4 to efficiently separate sludge by settling. Since a flocculent is still remains in the desorbed water even in a small amt., the flocculation of sludge is promoted. The supernatant water freed from solid matter is returned to the closed water area. An aerator is set in the closed water area to purify water. The precipitation of sludge in water is promoted by the flocculent remaining in the desorbed water. The water is made harmless by the reaction of the residual components, and water purification is promoted by the combination of the contaminant removal and aeration.

10. 发明专利

JPH02174997A HORIZONTAL SHAFT TYPE AERATOR 失效
公开(公告)号：JPH02174997A
公开(公告)日：1990-07-06
申请号：JP33169988
申请日：1988-12-28
申请人： HITACHI KIDEN KOGYO KK
发明人： ITO HAJIME , SHIMADA EIJI , MIZUTA KOICHI
IPC分类号： C02F3/18 , B01F3/04
摘要： PURPOSE:To stably, efficiently and uniformly aerate sewage with the horizontal shaft type aerator by dividing a driving shaft and driving the driving shafts discretely by devices for controlling rotating speeds. CONSTITUTION:A circumferential wall 11 of a small diameter and an outer peripheral wall 12 of a large diameter are concentrically disposed and a circulating water path 13 having the depth of a required width is formed between the inner and outer peripheral walls 11 and 12. The aerator 2 installed in the circulating water path 13 is constituted as a horizontal shaft type and is so installed as to cross the water path 13. The aerator 2 is divided to two units and two units are adjacently and coaxially disposed. The rotating speed of the aerator 2 on the inner side of the water path is set higher than the outer side if stirring vanes are of the same diameter. The horizontal shaft type aerators 2, 2 are so constituted as to change the flow velocity in the crossing direction of the water path according to the shape and size of the endless water path 13 to be aerated and, therefore, the sewage is uniformly mixed in the crossing direction of the water path and is stably, efficiently and uniformly aerated.

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