专利汇可以提供Cryogenic storage tank improvements专利检索,专利查询,专利分析的服务。并且Liquified gas is stored underground in a large double walled container seated in an opening in the earth''s surface. Between the walls of the liner, thermal insulation is distributed in a continuous layer along the floor and wall of the opening. A diaphragm is supported across the top of the opening with a seal being provided between the diaphragm and the double walled liner to form a container for the liquified gas. Surrounding the lip of the opening is a concrete ring across which a net of cables is stretched to support a thermally insulating ceiling. A cooling system is provided for freezing the earth to aid in the excavation of the opening and this system is subsequently used to maintain the wall and floor of the opening frozen to a controlled thickness by cooling them in response to a rise in the temperature of the surrounding earth above a predetermined temperature level. Also disclosed are various techniques for constructing a storage tank of the type described.,下面是Cryogenic storage tank improvements专利的具体信息内容。
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