A corresponding amount of steam is required to heat the process water, which has an initial temperature of 25° C in summer and 5° C in winter and must be brought to 65 °C / 70° C° process temperature. The process steam or the high temperatures are mainly used to remove acids, gases and salts from the natural fibre material.
Until 2018, Walsroder Casings GmbH had purchased the necessary steam from the local industrial boiler house to ensure the pulp processing process. Due to highly expensive purchase conditions and a lack of willingness to negotiate on the part of the subsequent power plant operator, the company decided to produce process steam on its own in the future.
For this purpose, the sausage casing manufacturer installed three steam generators from Clayton Germany in the production plant two years ago. Compared to shell boilers, steam generators are ideal for providing specific quantities of steam, as they are ready for operation spontaneously within 5 minutes of a cold start. Shell boilers, on the other hand, have to be kept permanently at temperature, which has a comparatively negative effect on their energy balance.
To bridge the conversion, Clayton Germany had supplied the producer with a mobile container for almost half a year to maintain the steam supply in the meantime.