Method and system for energy savings in TMP by high temperature LC/MC refining of pulp
First Claim
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1. A method for recovering heat from a pulp refining process comprising:
- discharging pressurized pulp from a high pressure mechanical refiner, wherein the pressurized pulp comprises a pressurized slurry of fibers and liquid;
introducing at least the liquid from the pressurized pulp to a pressurized flash tank;
separating pressurized steam from pressurized pulp in the pressurized flash tank, andusing the separated pressurized steam in the pulp refining process.
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Abstract
A method for recovering heat from a pulp refining process comprising: discharging pressurized pulp from a high pressure refiner, wherein the pressurized pulp comprises a pressurized slurry of fibers and liquid; introducing at least the liquid from the pressurized pulp slurry to a pressurized flash tank; exchanging heat from the pressurized flash tank with water, such that the water is heated, and using the heated water in the pulp refining process.
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18 Claims
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1. A method for recovering heat from a pulp refining process comprising:
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discharging pressurized pulp from a high pressure mechanical refiner, wherein the pressurized pulp comprises a pressurized slurry of fibers and liquid; introducing at least the liquid from the pressurized pulp to a pressurized flash tank; separating pressurized steam from pressurized pulp in the pressurized flash tank, and using the separated pressurized steam in the pulp refining process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method to recover high pressure steam a mechanical pulp refining process comprising:
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introducing a pressurized pulp slurry to a high pressure mechanical refiner, wherein the pulp slurry comprises fibers and liquid; refining the pressurized pulp slurry in the refiner; discharging a refined pressurized pulp slurry from the mechanical refiner; introducing a least a liquid portion of the discharged refined pressurized pulp slurry to a pressurized flash tank; separating pressurized steam from at least a liquid portion of the discharged refined pressurized pulp slurry in the pressurized flash tank; applying the separated pressurized steam from the flash tank for use in another process in a pulp mill. - View Dependent Claims (15, 16, 17, 18)
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Specification