FR2408554A1 - Detoxicating water from surface treatment bath - esp. for metal or plastic, using resistivity measurement as control means - Google Patents

Detoxicating water from surface treatment bath - esp. for metal or plastic, using resistivity measurement as control means

Info

Publication number
FR2408554A1
FR2408554A1 FR7734376A FR7734376A FR2408554A1 FR 2408554 A1 FR2408554 A1 FR 2408554A1 FR 7734376 A FR7734376 A FR 7734376A FR 7734376 A FR7734376 A FR 7734376A FR 2408554 A1 FR2408554 A1 FR 2408554A1
Authority
FR
France
Prior art keywords
water
resistivity
detoxicant
bath
metal
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.)
Withdrawn
Application number
FR7734376A
Other languages
French (fr)
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.)
DISTRIBUTION INDLE PRODUIT ANO
Original Assignee
DISTRIBUTION INDLE PRODUIT ANO
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 DISTRIBUTION INDLE PRODUIT ANO filed Critical DISTRIBUTION INDLE PRODUIT ANO
Priority to FR7734376A priority Critical patent/FR2408554A1/en
Publication of FR2408554A1 publication Critical patent/FR2408554A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D21/00—Control of chemical or physico-chemical variables, e.g. pH value
    • G05D21/02—Control of chemical or physico-chemical variables, e.g. pH value characterised by the use of electric means
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • C02F1/685—Devices for dosing the additives
    • C02F1/686—Devices for dosing liquid additives
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C02F2101/22—Chromium or chromium compounds, e.g. chromates
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/004—Seals, connections
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/05—Conductivity or salinity

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

The process comprises continuous measurement of the resistivity of the ringing bath for each type of toxic product to eliminate or for the whole bath by means of a probe immersed in the treatment bath(s). A resistivity level is fixed above which an electro-valve, commanded by the resistivity meter, opens to admit clean water, to reduce the resistivity to a fixed level. The polluted water withdrawn is passed to a purifcn. vessel where the exact quantity of detoxicant is introduced controlled by the resistivity meter. The process is carried out in an installation comprising (a) a rinsing bath linked to (b) a purificn, vessel; a source of fresh water for (a) and of detoxicant for (b); an electro valve on the water feed and a pump for the detoxicant controlled via a resistivity meter linked to a probe in (a). The process is used for the treatment of metal and plastics surfaces. It enables a reduction in the amt. of water and detoxicant used and is cheaper and easier than present methods.
FR7734376A 1977-11-09 1977-11-09 Detoxicating water from surface treatment bath - esp. for metal or plastic, using resistivity measurement as control means Withdrawn FR2408554A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7734376A FR2408554A1 (en) 1977-11-09 1977-11-09 Detoxicating water from surface treatment bath - esp. for metal or plastic, using resistivity measurement as control means

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7734376A FR2408554A1 (en) 1977-11-09 1977-11-09 Detoxicating water from surface treatment bath - esp. for metal or plastic, using resistivity measurement as control means

Publications (1)

Publication Number Publication Date
FR2408554A1 true FR2408554A1 (en) 1979-06-08

Family

ID=9197650

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7734376A Withdrawn FR2408554A1 (en) 1977-11-09 1977-11-09 Detoxicating water from surface treatment bath - esp. for metal or plastic, using resistivity measurement as control means

Country Status (1)

Country Link
FR (1) FR2408554A1 (en)

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Legal Events

Date Code Title Description
ST Notification of lapse