JPS571409A - Controller for addition of chemical in water clarification plant - Google Patents

Controller for addition of chemical in water clarification plant

Info

Publication number
JPS571409A
JPS571409A JP7436680A JP7436680A JPS571409A JP S571409 A JPS571409 A JP S571409A JP 7436680 A JP7436680 A JP 7436680A JP 7436680 A JP7436680 A JP 7436680A JP S571409 A JPS571409 A JP S571409A
Authority
JP
Japan
Prior art keywords
addition
raw water
alkalinity
measured
circuit
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.)
Granted
Application number
JP7436680A
Other languages
Japanese (ja)
Other versions
JPS6014602B2 (en
Inventor
Tomonori Kaneko
Norihisa Suzuki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7436680A priority Critical patent/JPS6014602B2/en
Publication of JPS571409A publication Critical patent/JPS571409A/en
Publication of JPS6014602B2 publication Critical patent/JPS6014602B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

PURPOSE: To accomplish favorable flocculation using a flocculant and a reduced amount of alkali chemicals by method wherein alkali chemicals are added to raw water at the maximum addtion ratio selected from addition ratios which are so determined as to cause the alkalinity of raw water, the alkalinity and the pH of flocculation-treated water to become at least specified values.
CONSTITUTION: The alkalinity A1 of the raw water entering a feed well 1 is measured by an alkalinity meter and is inputted to an addition ratio calculating circuit 11. The flow rate Q0 of the raw water flowing from the well 1 into a rapid agitation basin 2 is measured by a flowmeter 5, and the alkali chemicals are added into the raw water by an alkali chemical adding device 6. After adding the flocculant into the raw water in the basin 2, the alkalinity A2 and the pH of the flocculation-treated water are measured by an alkalinity meter 8 and a pH meter 9, respectively. Addition ratio calculating circuits 12, 13 calculate the addition ratios α3, α2 according to the values measured at the meters 9, 8 respectively. A maximum value selecting circuit 14 selects the maximum ratio αmax from among the addition ratios obtained by the calculating circuits 11W13, and feeds it to an addition amount calculting circuit 15. The circuit 15 claculates an addition amount from the above flow rate Q0 and the addition ratio αmax, and in accordance with the ad dition amount thus calculated, the adding device 6 adds the alkali chemicals to the raw water.
COPYRIGHT: (C)1982,JPO&Japio
JP7436680A 1980-06-04 1980-06-04 Chemical injection control method for water purification equipment Expired JPS6014602B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7436680A JPS6014602B2 (en) 1980-06-04 1980-06-04 Chemical injection control method for water purification equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7436680A JPS6014602B2 (en) 1980-06-04 1980-06-04 Chemical injection control method for water purification equipment

Publications (2)

Publication Number Publication Date
JPS571409A true JPS571409A (en) 1982-01-06
JPS6014602B2 JPS6014602B2 (en) 1985-04-15

Family

ID=13545082

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7436680A Expired JPS6014602B2 (en) 1980-06-04 1980-06-04 Chemical injection control method for water purification equipment

Country Status (1)

Country Link
JP (1) JPS6014602B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60172517A (en) * 1984-02-20 1985-09-06 Toray Ind Inc Extrusion molding method and apparatus for high polymer sheet-shaped matter
JPS60220114A (en) * 1984-04-13 1985-11-02 Mitsubishi Electric Corp Treatment of water
KR100821667B1 (en) 2006-07-19 2008-04-11 한국과학기술연구원 Device and method for injecting cogulant for water purification

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60172517A (en) * 1984-02-20 1985-09-06 Toray Ind Inc Extrusion molding method and apparatus for high polymer sheet-shaped matter
JPS60220114A (en) * 1984-04-13 1985-11-02 Mitsubishi Electric Corp Treatment of water
KR100821667B1 (en) 2006-07-19 2008-04-11 한국과학기술연구원 Device and method for injecting cogulant for water purification

Also Published As

Publication number Publication date
JPS6014602B2 (en) 1985-04-15

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