Water is used widely as a cooling medium in processes for many industries and public buildings. The use of an evaporative cooling tower is still the most effective method of heat transfer. Heat is transferred from hot process fluids into the cooling water through a heat exchange surface; consequently, the cooling water heats up. The evaporation of a small percentage of this cooling water in a cooling tower, then reduces the temperature of the cooling water, allowing it to be used for cooling again. Make-up water is used to replace the evaporated water.
Evaporative condensers are often used to cool closed systems whereby pipework containing hot process fluids is sprayed with water to remove heat from the system. The primary objectives in the design, operation and effective treatment of cooling water systems include efficiency in heat transfer, minimisation of energy and water usage, and safe, reliable operation.
When operating a cooling system, there are several considerations to ensure the achievement of these objectives, which include the control of scale, corrosion, fouling, and the control of microbiological contamination including Legionella spp.
B & V Chemicals have a full range of cooling tower water treatment chemicals. This range also contains many specialist products formulated for use in specific specialist situations or for use in response to problematic situations. Our Technical department is always available for advice on product selection, problem solving, and compatibility with other formulations already being used in certain systems. A summary of our core range of products is below, many other formulations for cooling water systems are also available.
Scale and Corrosion Inhibitors
|BV46||A blend of phosphonates, polymers and azoles||Concentrated all organic corrosion and scale inhibitor for soft waters. Suitable for water hardness 25 – 250ppm|
|BV47||A blend of phosphonates, polymers and azoles||All organic corrosion and scale inhibitor for soft waters and smaller systems. Suitable for water hardness 25 – 250ppm|
|BV664||A blend of phosphonates, polymers and azoles||All organic corrosion inhibitor for medium hardness waters.|
|BV640||A blend of phosphonates, polymers and azoles.||High strength all organic corrosion inhibitor for high hardness waters.|
|BV48||A blend of phosphonates, polymers and azoles.||Medium strength all organic corrosion inhibitor for high hardness waters.|
|BV49||A blend of phosphonates, polymers and azoles.||Low strength all organic corrosion inhibitor for high hardness waters.|
|BV45||A blend of phosphonates, polymers and azoles & sodium bromide||All organic corrosion inhibitor for naturally soft waters. Contains sodium bromide for cost effective generation of hypobromous acid when dosed with sodium hypochlorite.|
|BV50||Silicate based soft water inhibitor||Concentrated low toxicity silicate based corrosion inhibitor for naturally soft and softened water.|
|BV51||Silicate based soft water inhibitor||Low toxicity silicate based corrosion inhibitor for naturally soft and softened water. Suitable for use in smaller systems.|
|BV52||Sodium molybdate based soft water inhibitor||Concentrated high molybdate based corrosion inhibitor designed for soft water. Benefits from some hardness being present.|
|BV53||Sodium molybdate based soft water inhibitor||A high molybdate based corrosion inhibitor designed for soft water. Benefits from some hardness being present. Designed for smaller systems.|
|BV1260||Sodium molybdate based soft water inhibitor||Cost effective molybdate based soft water inhibitor. Benefits from some hardness being present|
|BV540||A blend of phosphonates, phosphates, polymers and azoles.||A phosphate based product specifically designed for the passivation of Galvanised towers.|
|BV250||Supplementary product to control phosphates where there are high levels of phosphates in make-up water.||A blend of polymeric dispersants.|
|BV197||Zinc based corrosion and scale inhibitor||A zinc based corrosion inhibitor for cooling towers.|
|BV472||An acidic zinc based aqueous solution.||A specialist scale and corrosion inhibitor for use in cooling systems, can processing, pasteurisation, and sterilisers.|
Scale and Corrosion Inhibitors (+ Sodium Bromide)
Often, cooling tower biocidal treatment is accomplished with bromine based oxidizing biocides generated from dosing sodium bromide solution in conjunction with sodium hypochlorite. On some sites it is more convenient and economical to dose a scale and corrosion inhibitor containing sodium bromide in conjunction with sodium hpochlorite in order to generate hypobromous acid for microbial control.
|BV456||A blend of phosphonates, polymers and azoles & sodium bromide||All organic corrosion inhibitor for medium hardness waters. Contains sodium bromide for cost effective generation of hypobromous acid when dosed with sodium hypochlorite.|
|BV457||A blend of phosphonates, polymers and azoles & sodium bromide||All organic corrosion inhibitor for high hardness waters. Contains sodium bromide for cost effective generation of hypobromous acid when dosed with sodium hypochlorite.|
|BV785||Silicate based soft water inhibitor & sodium bromide||Concentrated low toxicity silicate based corrosion inhibitor for naturally soft and softened water. Contains sodium bromide for cost effective generation of hypobromous acid when dosed with sodium hypochlorite.|
|BV974||Zinc based corrosion and scale inhibitor & sodium bromide||A zinc based corrosion inhibitor for cooling towers. Contains sodium bromide for cost effective generation of hypobromous acid when dosed with sodium hypochlorite.|
Scale and Corrosion Inhibitors (+ Biodispersant)
Biofilm build up within a system will greatly inhibit the heat transfer efficiency of the system as well as blocking pipework. A build-up of biofilm within a system will also encourage the growth of Legionella bacteria and may promote the formation of under deposit corrosion. Biodispersants can be incorporated in the treatment regime for cooling towers in a number of ways including within the formulations of some of our range of scale and corrosion inhibitors.
|BV1437||A blend of phosphonates, polymers and azoles & biodispersant||All organic corrosion inhibitor for low hardness waters. Contains biodispersant.|
|BV1436||A blend of phosphonates, polymers and azoles & biodispersant||All organic corrosion inhibitor for high hardness waters. Contains biodispersant|
|BV1435||Silicate based soft water inhibitor & biodispersant||Concentrated low toxicity silicate based corrosion inhibitor for naturally soft and softened water. Contains biodispersant|
|BV1438||Sodium molybdate based soft water inhibitor & biodispersant||Cost effective molybdate based soft water inhibitor. Benefits from some hardness being present. Contains biodispersant|
As well as the scale and corrosion inhibitors listed above, we also have our iChem range; a range of extremely concentrated, economical in-use corrosion and scale inhibitors used in larger industrial systems. Please contact our technical department for further details on this range
The water within a cooling system provides optimal growth conditions for many species of bacteria, including Legionella spp. The warm environment and high levels of organic debris make for a particularly pleasant environment for rapid bacterial growth if this is left uncontrolled.
Legislation requires that cooling towers must prevent the proliferation of Legionella bacteria within these systems as a precaution against the outbreak of Legionnaires disease. It is therefore critical that the correct biocidal treatment regime is implemented and regular checks are carried out to ensure that bacterial populations within the system are kept under control.
Biocides can be divided into 2 main groups; oxidising biocides and non-oxidising biocides:
Oxidising biocides simply oxidise microbial cells and will kill most micro-organisms including bacteria, algae, fungi, and yeasts.
Non-oxidising biocides kill microorganisms typically by disrupting the organism’s metabolism or damaging the cell wall.
Biodispersants do not kill organisms but they do break up any deposits of microorganisms allowing the biocides to attack the organisms more effectively. They also inhibit the attachment of microorganisms to metal surfaces.
|BV102||Sodium Hypochlorite||Sodium hypochlorite 14/15%|
|BV54||14/15% sodium hypochlorite + biodispersant||A chlorine-based biocide for the treatment of cooling towers. Dosed 1:1 with BV1422 to generate hypobromous acid|
|BV1422||Sodium Bromide solution||A solution of sodium bromide for the treatment of cooling towers. Dosed 1:1 with BV54 to generate hypobromous acid.|
|BV138||Concentrated sodium bromide sdolution||A solution of sodium bromide for the treatment of cooling towers. Dosed 1:3 with BV54 to generate hypobromous acid.|
|BV476||Bromine tablets||A mixture of brominated and chlorinated hydantoins.Releases both bromine and chlorine in the form of hypobromous acid and hypochlorous acid. The product should be dosed using a purpose built brominator to ensure good dose control.|
|BV923||A stablised hypobromite solution||Stabilised Bromine biocide. Single dose product. For use as a biocide in the treatment of cooling towers. Dose 15ppm product to give 1-2ppm bromine.|
|BV63||Concentrated THPS based biocide & biodispersant||Low toxicity. Excellent against Pseudomonas spp, Legionella spp and algae. Concentrated formulation. The biodispersant in the formulation enhances biocidal activity, removes biofilm and prevents the formation of additional biofilm.|
|BV1531||ITA blend||A highly effective broad spectrum biocide. Effective against Legionella.|
|BV105||BNP||A broad-spectrum bactericide. Low toxicity. Effective against Legionella.|
|BV1507||Glutaraldehyde||Has a broad spectrum of activity against bacteria and their spores, fungi, also effective against Legionella spp. Rapid biocidal action. Concentrated product.|
|BV1528||Proprietary||A highly effective non-oxidising biocide containing a synergistic combination of biocides. Ideal for use in closed circuit or open cooling systems. Effective against, Pseudomonas spp and Legionella spp.|
|BV529||DBNPA||Has a broad spectrum of activity against bacteria and their spores, fungi, also effective against Legionella spp. Rapid biocidal action.|
|BV67||Quaternary ammonium chloride||A broad spectrum disinfectant and biocide. Effective against Legionella. Effective in heavily soiled systems. Good surfactant properties. Rapid biocidal action.|
|BV66||Contains a polymeric quaternary ammonium compound||Very effective algaecide for use in open cooling systems and swimming pools|
|BV14||Concentrated biodispersant||Extremely low foaming. Improves the effectiveness of any biocide programme.|
|BV963||Biodispersant||Extremely low foaming. Improves the effectiveness of any biocide programme.|
|BV2||Mineral Hydrocarbon||Versatile antifoam which can be used in open cooling, process water and waste water treatment applications. Low dose rate, long lasting antifoam|
Pack Cleanse Range
Our PackCleanse cleaning system; effectively cleans light to moderately fouled packs in place by combining the disinfecting power of chlorine dioxide, with the cleaning power of a weakly acidic surfactant mixture. The system produces a high-cling foam which is applied to surfaces to be cleaned under low pressure. The design of the dosing equipment is important. A stable wet foam is essential. Please contact us for advice on the optimal equipment for use in applying this range of products.
|BV740||phosphoric acid and surfactant||Foam cleaning detergent for the cleansing of cooling tower pack. Forms a stable wet foam that is able to slowly flow through the tower packing. Mildly acidic so as to remove inorganic scales. An effective alternative cleaning solution where it is not possible to remove cooling tower pack.|
|BV741||phosphoric acid and surfactant||Foam cleaning detergent for the cleansing of cooling tower pack. Low acid version of BV740.|
|BV743||Contains stabilised chlorine dioxide.||A powerful disinfectant for use in the cleaning and disinfection of cooling tower packing. Activated when mixed with BV740 or BV741.|
|BV744||Silicone based antifoam||De-foamer for use in cooling tower foam cleaning. Breaks down stable acidic foam. Apply to the tower sump at the end of the pack cleaning procedure.|
|BV745||Contains acid and chlorine neutralisers.||Neutraliser for use in cooling tower foam cleaning|
Specialist on-line descaler for cooling towers
|BV846||Contains a unique polyphosphonate.||A very effective calcium carbonate and calcium sulphate scale inhibitor which also effectively removes calcium carbonate scale on-line during normal cooling tower operation.|
|BV78||28% Hydrochloric acid.||For acid descaling.|
|BV1535||Hydrochloric acid 32% + corrosion inhibitor||A highly active acid cleaner and descaler. Also includes a corrosion inhibitor to protect bare metal surfaces particularly carbon steel. Removes both calcium and iron deposits.|
|BV13||Aliphatic amine based corrosion inhibitor||Confers corrosion inhibition during descaling with Hydrochloric acid|
|BV42||Sulphamic acid crystals||Mild acid descaler. Crystals. Dissolve in water to produce a 5 – 10% solution.|
|BV43||Sulphamic acid crystals + amine based corrosion inhibitor.||A highly active combination of acid cleaner and descaler with corrosion inhibitor to protect carbon steel, copper and brass against acid attacks. It can be used on a wide variety of metals including stainless steel. Dissolve crystals in water to produce a 5 – 10% solution then add inhibitor as instructed on product data sheet.|
|BV231||Sulphamic acid solution||Ready to use Sulphamic acid descaler.|
|BV1427||Formic acid||Less corrosive than hydrochloric acid. Recommended for stainless steel.|
|BV532||Formic acid + corrosion inhibitor||Less corrosive than hydrochloric acid. Recommended for stainless steel. Corrosion inhibitor included.|
|BV8||Mineral oil based antifoam||Gives foam control during descaling operations.|
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HuwaSan specialise in the production and distribution of chemicals for water treatment. B & V Chemicals are water treatment supply partners in the UK.