At Wistrand we continuously develop our procedures in order to improve the technical results and to minimize any negative impact on the environment.
A boiler with fewer operating hours since the last performed chemical cleaning are normally easier to clean than a boiler with twenty years of operation. It then requires fewer steps in the treatment, the cleaning becomes less complicated and can often be performed with a lower chemical concentrations and volumes. This also means less negative impact on the external environment, as well as shorter time for the actual cleaning.
Wistrand is certified according to ISO 14001:2015 and work according to an environmental and safety policy. When you contract Wistrand, you can always be sure that we will put safety and environment first — without compromising the quality.
If the chemical cleaning can not be included in the customers general environmental permit or conditions, a special specification regarding the waste disposal must be drawn up.
This specification should be presented to the regulatory authority of the plant, which in their turn forwards it to other relevant authorities — who in the end grants the permissions.
The specification describes the cleaning process, treatment of the waste chemicals and provides benchmarks to be achieved for the water phases. It also specifies where and how water will be sent and how to take care of any sludge phase.
Each specification is unique, since the conditions vary from place to place, and the requirements on both cleaning results and waste disposal continuously becomes more strict.