MEWA Textil-Service: Optimal wash water

The ageing central water softening system had to be replaced to supply soft water to the Bottrop laundry site.

The new concept envisaged the use of high-quality system technology with PP piping. Changing the mode of operation from direct current regeneration to counter-current should reduce operating costs. An additional series changeover circuit was also provided for maximum operational reliability.

The conversion of the new system to counter-current operation led to savings of approx. 50% in regenerating salt. By means of a fully automatic hardness measurement between the two exchangers in operation, the capacity can now be fully utilized even with fluctuations in the raw water hardness without a hardness break occurring. Both exchangers are always connected in an alternating series circuit (1-2 : 2-1) so that any hardening slip from the first operating exchanger is absorbed by the second safety exchanger connected in series. The circuit is changed after each regeneration.

By means of a fully automatic hardness measurement between the two exchangers in operation, the capacity can now be fully utilized even with fluctuations in the raw water hardness without a hardness break occurring. In addition, the conversion of the new system to counter-current operation led to savings of approx. 50 % in regenerating salt.

The conversion of the system was carried out over the Whitsun holidays. Quote from the customer: “If everything goes according to plan and without disruptions, my cell phone doesn’t ring – and my cell phone didn’t even ring.”