JPS5549112A - Control method of gravity type filtering basin - Google Patents

Control method of gravity type filtering basin

Info

Publication number
JPS5549112A
JPS5549112A JP12147478A JP12147478A JPS5549112A JP S5549112 A JPS5549112 A JP S5549112A JP 12147478 A JP12147478 A JP 12147478A JP 12147478 A JP12147478 A JP 12147478A JP S5549112 A JPS5549112 A JP S5549112A
Authority
JP
Japan
Prior art keywords
valve
washing
basins
influent
filtration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP12147478A
Other languages
Japanese (ja)
Inventor
Tadao Yamagishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP12147478A priority Critical patent/JPS5549112A/en
Publication of JPS5549112A publication Critical patent/JPS5549112A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent the water level fluctuations of effluent channels of sedimentation basins and perform stable control on the water intake side by fully opening the filtration flow control valve at the start of washing and slowly starting the influent valve after washing in the washing process of the gravity type filtering basins provided with (n) basins.
CONSTITUTION: In the washing process, a washing preparation command is outputted and a close command is emitted to an influent valve 20. At the same time, the flow control valve 22 under filtration flow control by a controller 15 is forcefully fully opened. Next, the time for lowering of the water level of the filtering basins is made faster and the timing of the filtration signal OFF is taken in parallel with the cleaning water valve 23 close command. Next, the filtration flow during the time when the cleaning water valve 23 in the filtering basin under washing is balanced with the flow owing to the delay in response to the increase in the flow signal of the other basins under filtration which occurs because the filteration signals are reduced by 1 basin, whereby the water level in the sedimentation basin effluent channel 2 is maintained stably. In the influent process, the valve 20 is slowly started after the influent vavle 20 open command to avoid abrupt change in the water level of the effluent channel 2, so that the control on the water intake side may be sufficiently responded.
COPYRIGHT: (C)1980,JPO&Japio
JP12147478A 1978-10-04 1978-10-04 Control method of gravity type filtering basin Pending JPS5549112A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12147478A JPS5549112A (en) 1978-10-04 1978-10-04 Control method of gravity type filtering basin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12147478A JPS5549112A (en) 1978-10-04 1978-10-04 Control method of gravity type filtering basin

Publications (1)

Publication Number Publication Date
JPS5549112A true JPS5549112A (en) 1980-04-09

Family

ID=14812040

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12147478A Pending JPS5549112A (en) 1978-10-04 1978-10-04 Control method of gravity type filtering basin

Country Status (1)

Country Link
JP (1) JPS5549112A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6317246A (en) * 1986-07-08 1988-01-25 宇部興産株式会社 Low specific gravity cement composition for high temperature
JP2001208008A (en) * 1999-12-15 2001-08-03 Caterpillar Inc Hydraulic circuit having pressure equalization during regeneration

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS532181A (en) * 1976-06-28 1978-01-10 Onoda Cement Co Ltd Bottle gripper
JPS533176A (en) * 1976-06-30 1978-01-12 Toshiba Corp Automatic positioning method and its device for x-ray diagnosis apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS532181A (en) * 1976-06-28 1978-01-10 Onoda Cement Co Ltd Bottle gripper
JPS533176A (en) * 1976-06-30 1978-01-12 Toshiba Corp Automatic positioning method and its device for x-ray diagnosis apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6317246A (en) * 1986-07-08 1988-01-25 宇部興産株式会社 Low specific gravity cement composition for high temperature
JP2001208008A (en) * 1999-12-15 2001-08-03 Caterpillar Inc Hydraulic circuit having pressure equalization during regeneration

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