Apparatus and method for purifying liquid

Abstract

The invention relates to an apparatus and a method for purifying liquid. The apparatus comprises an air-tight container (301) and a heater (305). The air-tight container is configured to store the liquid, wherein at least a portion of the container consists of a filter membrane (303). The heater is configured to heat the liquid such that the liquid is driven out of the container through the filter membrane. The heater can actively increase the pressure in the container by heating the liquid and/or gas in the container. Sometimes, a portion of the liquid stored in the air-tight container may be vaporized, which increases the pressure in the container as well. Under the increased pressure, the liquid can be easily driven out of the container while being purified via the filter membrane. Since the filtration is actively driven by heating, the filtration efficiency of the apparatus can be controlled and improved according to various applications.

Dependencies are inferred from the claim text.