METHOD OF PASTEURIZING, MONITORING PU-UPTAKE, CONTROLLING PU-UPTAKE AND APPARATUS FOR PASTEURIZING

摘要

Method and apparatus for pasteurizing a liquid, such as beer, by leading it through a regenerative heat exchanger (11) comprising two zones (12, 13) wherein the cold beer is pre-heated by exchanging heat with hot pasteurized beer flowing in counterflow through the heat exchanger (11), the pre-heated beer being conducted to a pasteurizing heat exchanger (15) comprising four plate heat exchanger sections (18 - 21) arranged in series, wherein each of the sections (18 - 21) is connected to sources of hot and cold water through a conduit (22) for heating or cooling, respectively, the beer flowing in counterflow thereto, throttle valves (23 - 26) regulating the flow of either cold or hot water through each of the sections (18 - 21), the pasteurized beer being transferred from the pasteurizing heat exchanger section (21) to the regenerative heat exchanger section (13), temperature sensors T1 - T10 being arranged along the flow of beer for monitoring the beer temperature so as to control the uptake of pasteurizing units by the beer.