Pump seal oil system
AssigneeLummus Crest, Inc.
InventorsRoger P. Van Driesen, Bhaven Chakravarti
Life of this patent
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Abstract
A pump seal oil system for a reactor pump wherein seal oil is provided at a pre-determined rate of flow without changing the rate of flow in response to pressure differences between the seal oil in the pump and the reactor pressure. Seal oil is provided at a first rate when the reactor pump is in operation and at a second higher rate when the reactor pump is not in operation.
Claims12
In a process for circulating a fluid in a reactor by a reactor pump having an impeller which is in contact with the reactor fluid, wherein the reactor pump includes a seal oil for sealing the interior of the pump from the reactor, wherein the improvement comprises:
- introducing a seal oil into the reactor pump and circulating the seal oil through the interior of the reactor pump, said seal oil in the interior of the reactor pump being at a pressure greater than the pressure in the reactor;
- reducing the pressure of a portion of the seal oil for flow from the interior of the reactor pump for admixture with reactor fluid;
- and controlling the rate of flow of seal oil introduced into the reactor pump to maintain a pre-determined rate of flow, without changing the rate of flow in response to changes in the difference in pressure between the pressure of the seal oil in the interior of the reactor pump and the pressure in the reactor.
An apparatus comprising:
- a high pressure reactor;
- a reactor pump connected to the reactor, said reactor pump having an impeller in contact with reactor fluid;
- means for introducing and circulating a seal oil through the interior of the pump at a pressure greater than the pressure in the reactor;
- passage means for diverting a portion of the seal oil from the reactor pump for admixture with reactor fluid, said passage means including means for reducing the pressure of the seal oil in flowing from the reactor pump;
- and control means for maintaining a pre-determined flow of seal oil into the pump without changing said flow in response to the pressure difference between the seal oil in the interior of the reactor pump and the pressure in the reactor.
Dependencies are inferred from the claim text.