FR2694944A1 - Compsn. for softening scale on central heating pipes - contains sodium carbonate, sodium hydroxide, sodium silicate, anionic surfactant, reaction accelerator and water - Google Patents

Compsn. for softening scale on central heating pipes - contains sodium carbonate, sodium hydroxide, sodium silicate, anionic surfactant, reaction accelerator and water Download PDF

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Publication number
FR2694944A1
FR2694944A1 FR9210303A FR9210303A FR2694944A1 FR 2694944 A1 FR2694944 A1 FR 2694944A1 FR 9210303 A FR9210303 A FR 9210303A FR 9210303 A FR9210303 A FR 9210303A FR 2694944 A1 FR2694944 A1 FR 2694944A1
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FR
France
Prior art keywords
water
central heating
sodium
anionic surfactant
compsn
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
FR9210303A
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French (fr)
Inventor
Benhaim Alain
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR9210303A priority Critical patent/FR2694944A1/en
Publication of FR2694944A1 publication Critical patent/FR2694944A1/en
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Detergent Compositions (AREA)

Abstract

A compsn. for treating the internal surfaces of pipes used for circulation of functional liqs., esp. pipewok in central heating installations, comprises (by wt.): (i) 10-12% Na2CO3; (ii) 6-8% NaOH; (iii) 12-15% Na silicate, (iv) 12-14% anionic surfactant; (v) 8-10% reaction accelerator; and (vi) 40-50% water. USE/ADVANTAGE - The compsns. are added to the circulating water e.g. in an amt. of 10% of the vol. of the water in the installation to soften and loosen surface scale on the internal surface of the pipework, esp. where this treatment is carried out for 10-20 days prior to a conventional descaling treatment. The compsns. are safe to handle without special precautions and give efficient softening and loosening of scale on the internal surface of pipework, e.g. in central heating installations, esp. as a predescaling treatment.

Description

La présente invention a pour objet une composition destinée au traitement des surfaces internes des conduites à circulation de liquides de service, notamment des conduites des installations de chauffage central. The subject of the present invention is a composition intended for the treatment of the internal surfaces of pipes for circulation of service liquids, in particular pipes for central heating installations.

On sait les problèmes posés, dans ce type d'installations, de même que dans les installations de production de vapeur d'eau ou d'eau surchauffée, par exemple, par l'entretien et le nettoyage des conduites, qui s'encombrent régulièrement de boues dures à base d'oxydes métalliques et dont la disposition ne permet pas de recourir à un nettoyage mécanique. We know the problems posed in this type of installation, as well as in installations for producing steam or superheated water, for example, by the maintenance and cleaning of pipes, which regularly become cluttered. hard sludge based on metal oxides and whose arrangement does not allow the use of mechanical cleaning.

La présente invention a pour but de proposer une composition pour le prétraitement de ces conduites, permettant de réaliser un ramollissement desdites boues dures favorable à leur élimination, ledit traitement pouvant s'effectuer préalablement à l'opération de détartrage à laquelle il convient d'avoir régulièrement recours dans ce type d'installation. The object of the present invention is to propose a composition for the pretreatment of these pipes, making it possible to produce a softening of said hard sludge favorable for their elimination, said treatment being able to be carried out prior to the descaling operation which should be carried out. regularly used in this type of installation.

La composition selon l'invention, destinée au traitement des surfaces internes des conduites à circulation de liquides de service, présente l'avantage d'une efficacité éprouvée liée à une manipulation ne nécessitant pas de précautions particulières, compte tenu de sa faible causticité. The composition according to the invention, intended for the treatment of the internal surfaces of pipes for circulation of service liquids, has the advantage of proven efficacy linked to handling which does not require any particular precautions, given its low causticity.

La composition selon l'invention se caractérise essentiellement en ce qu'elle renferme, en pourcent en poids:
carbonate de sodium 10 à 12 %
hydroxyde de sodium 6 à 8 t
silicate de soude 12 à 15 %
tensio-actif anionique 12 à 14 %
accélérateur de réaction 8 à 10 %
eau 40 à 50 %
La composition selon l'invention, injectée dans les conduites à traiter pendant une durée comprise entre environ 10 et environ 20 jours à raison d'environ 10 % du volume d'eau de l'installation, permet d'obtenir les contenues dans les conduites, dont l'évacuation peut être ensuite effectuée à l'aide d'une vidange rapide de l'installation.The composition according to the invention is essentially characterized in that it contains, in percent by weight:
sodium carbonate 10 to 12%
sodium hydroxide 6 to 8 t
sodium silicate 12 to 15%
anionic surfactant 12 to 14%
reaction accelerator 8 to 10%
water 40 to 50%
The composition according to the invention, injected into the pipes to be treated for a period of between approximately 10 and approximately 20 days at a rate of approximately 10% of the volume of water of the installation, makes it possible to obtain the contents contained in the pipes , whose evacuation can then be carried out by means of a rapid emptying of the installation.

L'injection de la composition selon l'invention se fait au moyen de pompes raccordées à un bac et à l'installation, la circulation et le mélange des produits chimiques qu'elle renferme se faisant par le circulateur existant sur l'installation. The composition according to the invention is injected by means of pumps connected to a tank and to the installation, the circulation and mixing of the chemicals which it contains taking place by the circulator existing on the installation.

La composition selon l'invention convient particulièrement aux opérations de prédétartrage, notamment des réseaux de chauffage collectif à circulation d'eau chaude.  The composition according to the invention is particularly suitable for pre-scaling operations, in particular collective heating networks with circulation of hot water.

Claims (1)

REVENDICATION CLAIM Composition destinée au traitement des surfaces internes des conduites à circulation de liquides de service, notamment des conduites des installations de chauffage central, caractérisée en ce qu'elle renferme, en pourcent en poids Composition intended for the treatment of the internal surfaces of pipes for circulation of service liquids, in particular pipes of central heating installations, characterized in that it contains, in percent by weight carbonate de sodium 10 à 12 % sodium carbonate 10 to 12% hydroxyde de sodium 6 à 8 % sodium hydroxide 6 to 8% silicate de soude 12 à 15 % sodium silicate 12 to 15% tensio-actif anionique 12 à 14 W  anionic surfactant 12 to 14 W accélérateur de réaction 8 à 10 % reaction accelerator 8 to 10% eau 40 à 50 %  water 40 to 50%
FR9210303A 1992-08-24 1992-08-24 Compsn. for softening scale on central heating pipes - contains sodium carbonate, sodium hydroxide, sodium silicate, anionic surfactant, reaction accelerator and water Pending FR2694944A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9210303A FR2694944A1 (en) 1992-08-24 1992-08-24 Compsn. for softening scale on central heating pipes - contains sodium carbonate, sodium hydroxide, sodium silicate, anionic surfactant, reaction accelerator and water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9210303A FR2694944A1 (en) 1992-08-24 1992-08-24 Compsn. for softening scale on central heating pipes - contains sodium carbonate, sodium hydroxide, sodium silicate, anionic surfactant, reaction accelerator and water

Publications (1)

Publication Number Publication Date
FR2694944A1 true FR2694944A1 (en) 1994-02-25

Family

ID=9433039

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9210303A Pending FR2694944A1 (en) 1992-08-24 1992-08-24 Compsn. for softening scale on central heating pipes - contains sodium carbonate, sodium hydroxide, sodium silicate, anionic surfactant, reaction accelerator and water

Country Status (1)

Country Link
FR (1) FR2694944A1 (en)

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