Sanosil products for cooling water treatment

Sanosil products for cooling water treatment (Autotranslation)

SANOSIL AG, CH- 8634 Hombrechtikon, Switzerland E-mail: info@sanosil.com, Internet: www.sanosil.com

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That the work is by no means over with the construction and commissioning of a cooling circuit, the responsible technician notices at the latest when he has to think about how he can operate his cooling circuit in the simplest, safest, most effective and, above all, cheapest way.

Not only is some basic knowledge of mechanics, chemistry, physics and biology necessary, but also knowledge of measurement, control and regulation technology. However, since a thorough imparting of this knowledge would go far beyond the scope of this brochure and since most of the people in charge already have the basic knowledge, we have deliberately refrained from doing so. Instead, this brochure is intended to provide food for thought on how Sanosil disinfectants (combined with hardness stabilisers and corrosion protection) can ensure the most effective and costeffective operation of a cooling circuit.

Main tasks of cooling water treatment In addition to the treatment of the raw water, e.g. by filtration, cooling water treatment consists of three sub-aspects that always influence each other (regardless of the products used). If changes are made to one subsection, the effects on the other two must be closely observed and corrected if necessary.

Treatment

Product type

Underdosing

Overdose

Corrosion protection

Corrosion inhibitors

- Corrosion / pitting - Material damage

- Decrease in the K-value or reduction in efficiency

Deposit reduction

- Hardness stabilisation agent - pH correction - Dispersant

- Decrease of the K-value or Reduction of the efficiency, - Increased biofilm build-up due to rough surfaces. surfaces.

- Natural corrosion protection through Deposits

- increased risk of corrosion.

- Optimisation of the K-value or increase in efficiency

Biocide

- Deposits due to slime, algae and biofilm - Blockages, pump failure, etc.

- Reduction of the efficiency - Contamination of the environment by Germs (legionella, etc.)

(Depending on the biocide: ) - Corrosion - Environmental damage (waste water problem, formation of trihalometha ns (AOX) etc.)

Microbiology control (bacteria, algae)

Good cooling water treatment is achieved through a balanced relationship between the three aspects, whereby certain compromises must always be made.

Knowledge of one's own plant (materials used, construction), the raw water quality and precisely defined operating guidelines (e.g. K-value min/max, number of germs in the water, thickening factor, etc.) form the basis of a treatment package that is individually tailored to one's own needs or the plant.

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Microbiology control While the areas of corrosion protection and deposit reduction are relatively easy to measure and influence (corrosion protection and hardness stabilisation agents do not usually change during operation. The concentration in the water can be maintained proportional to the fresh water by simply adding them), the topic of microbiological control is much more complex.

The biocides usually used on a large scale - chlorine and/or bromides - require extremely careful handling. As the concentration varies depending on the water quality, temperature, organic pollutant input, etc., it is important to use If the concentration can change dramatically, all factors must be closely monitored. Ideally, a readjustment must take place shortly before degradation occurs, thus compensating for fluctuations in concentration. If this does not succeed, biological growth sets in.

Any overdosing, on the other hand, keeps the biological disruptive factors within bounds, but results in a massive increase in corrosiveness and (in the case of chlorine) in highly hazardous trihalomethanes or AOXs.

Biofim build-up in a smaller cooling circuit with insufficient disinfection . The pipes are completely clogged

Conclusion:

Ideally, therefore, a product must be used which: • is easy to dose, measure and regulate • causes as little corrosion as possible • reliably kills biofim or microorganisms • does not evoke environmental problems • reduced by long-term effect and stability Concentration fluctuations.

• can easily compete economically with the classically used products

Sanosil disinfectant Product description Sanosil disinfection products are biocide concentrates based on hydrogen peroxide and silver for use in cooling water systems. The excellent effectiveness is achieved even with small dosing quantities and make Sanosil safe and reliable products for cooling water systems. They prevent germ accumulation, biofilm build-up and algae build-up in the pipes and surfaces of cooling systems and thus ensure perfect heat transfer Sanosil also forms neither AOX nor THM and is characterised by its good environmental compatibility.

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Important properties of Sanosil disinfectants Sanosil disinfectant...

-...are highly effective against Biofim even in very small doses.

-...are much more stable in water compared to chlorine and bromine.

This reduces fluctuations in concentration.

-...reliably reduce re-germination (long-term effect due to the catalytically acting silver).

-... in contrast to UV lamps, they can also be used in turbid water.

-...do not cause any change in odour or taste of the treated water or air when dosed.

-...do not cause irritation to the skin, eyes and respiratory system in dosed condition.

-...are environmentally friendly, the main ingredient hydrogen peroxide does not pollute the waste water, as only water and oxygen (H2O and O2), i.e. no polluting by-products, are produced during its decomposition. ...have a very good shelf life compared to other oxidising disinfectants such as chlorine.

Mode of action The main active ingredient is the environmentally friendly hydrogen peroxide, which has been stabilised in a complex process and its effect against microorganisms has been strengthened by the addition of silver. This achieves an antimicrobial effect that is several times better than that of normal hydrogen peroxide. The amounts of silver remaining on the surface effectively counteract new germs.

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Sanosil biocides The Sanosil disinfectants/biocides are designed for water disinfection in different application areas, but are practically identical in effectiveness in the respective comparable application concentration.

Product

Insert

Special

- H2O2 content - Transport - Warning symbols

Sanosil Super 25 Disinfectant Highly concentrated

- Water disinfection - Legionella control Drinking water Cooling circuits

- Suitable for various applications - Drinking water approval in various countries - for professional users

Contains 50% H2O2 Dangerous Goods UN 2014 C, O

Sanosil C Biocide Highly concentrated

Water disinfection large cooling circuits, cooling towers

- cheaper than Super 25 - only available in bulk - only for cooling towers/circulatorsfor professional users

Contains 50% H2O2 Dangerous Goods UN 2014 C, O

Sanosil S015 Disinfectant concentrated

- Water disinfection - Legionella control Cooling circuits

- Suitable for smaller systems - No dangerous goods Easy storage and transport

Contains 7.5% H2O2 No dangerous goods

- Handling also possible by untrained personnel

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Application of Sanosil disinfection products Variant A: automatic, proportional disinfectant addition In this process, a quantity of approx. 5 - 30 ml/m3 (depending on the water quality) of Sanosil Super 25 /Sanosil C is continuously added to the fresh water of a cleaned(!) system via a dosing pump or a proportional mixing device.

The dosage depends on various factors such as water temperature, organic load, amount of fresh water, etc. The dosage is added via an injection valve in the fresh water supply line. Caution: Sanosil has a very strong effect against biofim. If a system is already overgrown with biofilm, the dosage should be done slowly and increased continuously. Otherwise the dead / detached biomasses will quickly clog all filters.

Variant B: manual discontinuous disinfectant addition To save the costs for a proportional dosing unit, the disinfectant can also be added manually or via a time-controlled dosing pump. The dosage for Sanosil C is approx. 100 ppm every 2-3 days.

Our specialists will be happy to help you with questions about dosage, application, etc.

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Sanosil cooling water additives As the perfect complement to our biocides, we recommend our Corfit Protect products for the treatment of open and semi-open cooling circuits. These act simultaneously as corrosion inhibitors, hardness stabilisers and dispersants, thus enabling sustainable and largely failure-resistant cooling circuit operation.

Product

Sanosil Corfit

Protect A

Sanosil Corfit

Protect B

Sanosil Corfit

Closed Std

Insert

Special

Hardness stabiliser, corrosion inhibitor and dispersant also for hard water with increased solids content

- For "all organic" operation in evaporative coolers.

- Increased limescale protection - Ideal for cooling towers without copper components.

Liquid corrosion inhibitor , hardness stabiliser and dispersant for systems with mixed metals / copper components and increased susceptibility to corrosion

- For "all organic" operation in evaporative cooling systems. With mixed metal materials.

- Increased corrosion protection / copper protection

Corrosion inhibitor / dispersant with molybdate

For closed cooling circuits (exl. aluminium parts)

Content

Contains phosphonates and polyelectrolytes

Contains organic corrosion inhibitors, phosphonates and polyelectrolytes.

Contains molybdate, Polyelectrolytes and non-ferrous metal inhibitors

Contains molybdate, polyelectrolytes and non-ferrous metal inhibitors.

Sanosil Corfit

Corrosion inhibitor / Dispersant with molybdate

For closed cooling circuits (incl. aluminium parts)

Sanosil Corfit

Biodispergator for cleaning / support of shock disinfection in case of biofilm build-up

For pre-treatment during commissioning/reset of an evaporative cooler

Contains Polyol ether polyol.

Sanosil Corfit

Pickling / rust removal and descaling agent

For pre-treatment during commissioning / reset of an evaporative cooler

Contains Amidosulfonic acid.

Dangerous goods

Closed Al

Initial

Bright

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Equipment / tools:

Sanosil AG carries a wide range of useful equipment for water analysis and disinfection such as:

• • • •

Measuring strips and photometers Dosing devices Measuring and control devices Microbiological control

Our specialists will be happy to advise you in this regard

SANOSIL AG, CH- 8634 Hombrechtikon, Switzerland Tel.: 055 254 00 54, Fax: 055 254 00 59 E-mail: info@sanosil.com, Internet: www.sanosil.com

Use biocides safely. Always read the label and product information before use.

Our technical application advice, both written and verbal, is based on extensive testing. We provide advice to the best of our current knowledge, but this is non-binding insofar as application and storage are beyond our direct control. Product descriptions or information about the properties of the preparations do not contain any statements about liability for any damage.

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