Automation of cleaning process in brewhouse

U radu je objašnjen način funkcioniranja metode čišćenja cleaning in place te prednosti korištenja te metode za pranje pivovare. Opisana je stanica za pranje varionice (engl. Cleaning in place brewhouse). Sastoji se od spremnika povratne vode, spremnika kiseline i dva spremnika lužine. Cijelom varionicom i CIP stanicom upravlja jedan programirljivi logički kontroler. Upravljački algoritam pisan je u programskom okruženju SIMATIC Step 7 tvrtke Siemens na standardnom softveru tvrtke Montelektro d.o.o. Kako bi se što jednostavnije i brže isprogramirala funkcionalnost CIP stanice prvo se popunjavaju pomoćni dokumenti iz kojih se generiraju razne funkcije i podatkovni blokovi. Opisani su ti dokumenti i njihove uloge. Objašnjen je upravljački algoritam pisan u koracima. Od tih koraka stvara se recept koji određuje točan redoslijed koraka za ispravan rad CIP stanice. Funkcionalnost CIP stanice testirana je pomoću izrađenog recepta i SCADA sustava.This paper explains the method cleaning in place and the advantages of using it for cleaning a brewery. A station for cleaning the brewhouse (CIP brewhouse) is described. It consists of a return water tank, acid tank and two caustic tanks. One programable logic controller is used for the whole brewhouse and the CIP station. The control algorithm was made in Siemens SIMATIC Step7 program environment using Montelektro’s standard software. In order to simplify and speed up the development of a program for controlling the CIP station, a few auxiliary documents are filled. They generate various functions and data blocks. Those documents and their role are described. The steps of the control algorithm are explained. From these steps a recipe is created, and it determines the exact sequence of those steps for the correct behaviour of the CIP station. CIP station functionality is tested with the prepared recipe in the SCADA system