Recovery of thermal energy from a thermomechanical pulp plant
AssigneeValmet Corporation
InventorPertti Ojala
Life of this patent
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Abstract
A method of recovering the thermal energy contained in the pressurized steam utilized during the production of thermomechanical pulp. The steam is applied to the primary side of a heat exchanger with water supplied to the secondary side in order to produce hot water. The water is vaporized to produce clean steam. The clean steam is then utilized to at least a first steam group of the drying sections of a paper manufacturing machine without increasing the pressure of the clean steam.
Claims11
A method of recovering the thermal energy contained in the pressurized process steam generated by a plant in the production of thermomechanical pulp, by utilizing it in the drying section of a paper manufacturing machine, said method comprising the steps of:
- (a) applying the process steam to the primary side of a heat exchanger;
- (b) applying water to the secondary side of the heat exchanger to produce hot water;
- (c) vaporizing the water to produce clean steam;
- and
- (d) utilizing the clean steam to at least a first steam group of the drying section of the paper manufacturing machine, without increasing pressure.
Dependencies are inferred from the claim text.