Guide

Chemical manufacturing water efficiency

Chemical manufacturing equipment cooling and vacuum pumps

There are several ways in which chemical manufacturers can reduce and optimise the use of water in cooling systems:

  • reuse - the water is usually relatively uncontaminated and can often be recirculated or reused, eg for cleaning
  • control use - fit thermostats to cooling circuits to control coolant flow and use only the minimum amount
  • cooling water composition - prevent build-up of solids and chemicals in water recirculation systems, and where possible fit an automated system, eg a total dissolved solids controller
  • reduce solids in cooling water - have a settlement or treatment stage in the circuit
  • condensate - improve recovery of condensate from condensers and steam traps and reuse it for cleaning or dilution

You can reduce water use in liquid ring vacuum pumps by:

  • interlocking the seal and cooling-water supply with a solenoid valve to shut off the water supply when the pump is not operating
  • using alternative seal liquids such as organic solvents with high boiling points instead of water, reducing the need to purge solids
  • using dry-vacuum technology such as lobe pumps, screw pumps and claw mechanism pumps

If you buy water efficient products, you may be able to benefit financially by claiming Enhanced Capital Allowances for efficient technologies.