CHEMICAL WATER TREATMENT

Water is used for a wide variety of industrial applications including:

  • Heating
    • Comfort heating for buildings
    • Heating or cooking in a manufacturing process
  • Cooling
    • Air conditioning
    • Cooling in a manufacturing process
  • Washing / Cleaning

Water treatment is a general name given to a wide range of equipment and chemicals which are there to prevent problems and increase efficiency.  The main problems found in industrial water systems are scale formation, corrosion and bacterial growth. Chemicals are sometimes added to the water to avoid or reduce these problems.

 

TYPES OF CHEMICAL WATER TREATMENT

water treatment chemicals

There are a wide variety of chemicals used as additives to water – the main types are:

 

BIOCIDES – control or reduce bacterial levels. Are usually oxidising agents such as sodium hypochlorite (bleach), or non-oxidisers.

 

DE-SCALING CLEANERS – remove scale which has formed in a water system. Usually acid based.

 

SCALE INHIBITORS – reduce scale formation in the water systems

 

CORROSION INHIBITORS – complex mixtures which reduce corrosion of metal components of the system such as pipework or heat exchangers

 

ANTIFREEZE – usually based on glycol, these allow the water system to operate at well below 0˚C

 

FLOCCULANTS AND COAGULANTS – used in waste water treatment to help remove selected solids

 

pH CONDITIONERS – acids or alkalines used to reduce or increase the pH of the water

 

DOSING WATER TREATMENT CHEMICALS

water treatment chemical Dosing systemWater treatment chemicals are often hazardous and handling them should be reduced as much as possible.                                                                        They are normally dosed using an automatic system of dosing pumps and tanks. Sensors are often used to detect                                                                the level of chemicals in the system and control the dosing.

 

 

 

 

 

 

 

 

 

 

THE ENVIRONMENT

Water treatment chemicals can often be hazardous and harmful to the environment. It is therefore important to consider the most environmentally friendly chemical solution and ensure that usage is minimised.

 

SUMMARY

There are a wide variety of water treatment chemicals available which can be very effective if applied correctly. Expert help is usually required to select the correct chemical and use it properly. Site chemical testing may be required to check the levels are optimised. Some complex formulations can be expensive, so any waste needs to be minimised.