An apparatus and method of removing salt from seawater to produce potable freshwater. The invention thus relates to the plants, seeds and tissue cultures of the variety CH267427, and to methods for producing a corn plant produced by crossing a corn plant of variety CH267427 with itself or with another corn plant, such as a plant of another variety. The radiating hole of the mantle and the dilatable fireproof piece could help to radiate the heat in ordinary situations and the dilatable fireproof piece will expand rapidly to close the radiating hole when on fire, therefore the fire inside the mantle will not spread to the outside.