D - Textiles – Paper – 21 – B
Patent
D - Textiles, Paper
21
B
92/55.3
D21B 1/00 (2006.01) D21B 1/18 (2006.01)
Patent
CA 1172486
Abstract of the Disclosure A method for improving the utilization of the heat energy produced in a wood grinding process, wherein wood is ground in a grinding space (3) under a pressure exceeding atmospheric pressure, and warm shower water (G) is sprayed into the grinding space. The groundwood pulp (A) is fed from the grinding space into a steam separator (11), wherein the heat energy contained in the groundwood pulp is released in the form of steam (H), and replacement water (E) is brought into the process for the compensation of shower water losses. The steam separator is kept pressurized in order to recover the steam (H) released from the groundwood pulp under a greater pressure and at a higher temperature than in an atmospheric steam separator. The water addition (E) to the recovered shower water is warmed up by means of the pulp suspension (B) discharged from the steam separator, whereby the pressure of the steam is decreased from the pressure of the pulp suspension entering the steam separa- tor only so much as is required for heating the replacement water to a temperature which will bring the shower water to the desired temperature after the replacement water has been mixed with said recovered shower water.
389311
Oy Tampella Ab
Swabey Ogilvy Renault
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