ion exchanger regeneration,
Ion exchanger regeneration is basically divided into the stationary on-site regeneration and the external ion exchanger regeneration service at a central ion exchanger regeneration station. On-site regeneration requires appropriate plant equipment for the necessary acids and alkalis, which must then be properly treated as wastewater in a wastewater treatment plant and then generally discharged into the municipal sewage system subject to approval. A notification is generally sufficient for discharges of less than 10 m³/week, while a permit is required for discharges of more than 10 m³/week, in which further requirements are specified, e.g. for self-monitoring, the staff employed and the quality of the wastewater. In some constellations, however, despite the exemption limit of 10m³/week, an indirect discharger permit is required in order not to violate the monitoring values.
With external ion exchanger regeneration, these steps are not necessary, as the ion exchanger (e.g. also a demineralization cartridge or a selective exchanger) is simply delivered to the regeneration station empty of residual water, either in the ion exchanger cartridge or in another container (e.g. tubs). This means that no wastewater is produced on site from the process water treatment, but there may be wastewater from the industrial use of demineralized water. The ion exchanger is recorded and categorized after delivery within the scope of the regeneration process. It is then subjected to an individual regeneration process depending on the loading process, the types of ion exchanger resin used and the specific quality of the ion exchanger supplied. This means that the chemicals required for the specific ion exchange resin and the process are provided and the resin is regenerated, rinsed with demineralized water, softened water or city water and then, if necessary, converted into the required operating form, so-called conditioning or activation, e.g. into the H/OH/Cl/K/Na/Ca/NH3 form.
In the case of IDE selective exchange resin, for example, this can be a specific pH value by converting it into the mono-sodium form or, for example, the Ca form or the K form. If the resin has been contaminated, e.g. with grease, oil or biology, this can – within certain limits – be removed during external regeneration, but may also trigger a resin exchange or ion exchanger change.
The ion exchanger is thus ready for use again within the scope of its total service life (of approx. 7 – 20 years, depending on use and type of ion exchanger) and is returned to the customer by tour, forwarding agent or collection.
We will be happy to send you a quote for the regeneration of your ion exchanger. Please feel free to contact us.
