Liquid pumps with hermetically sealed motor rotors

摘要

Embodiments of the invention are directed toward a novel pressurized vapor cycle for distilling liquids. In an embodiment of the invention, a liquid purification system is revealed, including the elements of an input for receiving untreated liquid, a vaporizer coupled to the input for transforming the liquid to vapor, a head chamber for collecting the vapor, a vapor pump with an internal drive shaft and an eccentric rotor with a rotatable housing for compressing vapor, a condenser in communication with the vapor pump for transforming the compressed vapor into a distilled product, and an electric motor with motor rotor and magnets hermetically sealed within the fluid pressure boundary of the distillation system.

主权项

1. A method for distilling a liquid in a liquid vapor distillation system comprising:
preheating liquid in a sump; vaporizing the liquid in the sump, through an evaporator, to form a vapor in a head chamber, the evaporator comprising a plurality of parallel evaporator tubes, each tube having a first open end in communication with the sump and a second open end in communication with a head chamber; compressing the vapor using a regenerative blower; condensing the compressed vapor into a distilled liquid product; post-treating the distilled liquid product comprising:
using a pulsatile pump, pumping additive into the distilled liquid product; maintaining a liquid level in the head chamber sufficient to permit both purification of the vapor and damping of local turbulence; and diverting a blowdown stream from the head chamber for maintaining a constant liquid level in the head chamber.