Method of improving the utilization of the heat energy produced

Details Method of improving the utilization of the heat energy produced Method of improving the utilization of the heat energy produced

1981-11-02

1984-01-31

Rosenbaum, Mark

Solid material comminution or disintegration

Processes

With application of fluid or lubricant material

241 21, 241 23, 241 28, 241 65, B02C 1108, B02C 2324

Patent

active

044285345

ABSTRACT:
A method of improving the utilization of the heat energy produced in a wood grinding process when 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. Steam (H) is separated from the groundwood pulp (A) discharged from the grinding space in a steam separator wherein the groundwood pulp is allowed to expand from its inlet pressure to atmospheric pressure in at least two steam separators (11,14) by releasing steam from the groundwood pump in each steam separator by decreasing the pulp pressure. The amount of steam (H1,H2) released in the separate steam separators is adjusted according to the proportions in which steam is needed for utilizations purposes. Thus the heat energy of the pressure grinding process can be recovered in separate steam fractions the amount and pressure of which correspond to the requirements of the utilization purposes. It is preferable to heat the shower water by steam of such a volume and pressure that the temperature of the shower water increases to a desired degree, preferably above 100.degree. C.

REFERENCES:
patent: 4012279 (1977-03-01), Selander et al.
patent: 4136831 (1979-01-01), Cederquist et al.
patent: 4274600 (1981-06-01), Halkkala
patent: 4324612 (1982-04-01), Lindahl

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