Abstract: In cleaning equipment for cleaning articles to be cleaned such as electric parts, electronic parts, machine parts, optical related parts, resin processed articles, printing screens or the like, cleaning using flammable solvent is made possible, and it is possible to maintain concentration of the cleaning solvent and to prevent the cleaning solvent from being contaminated. Thus, the cleaning is conducted at a low operation cost. For this purpose, any one of steam, steam and nitrogen, and steam and carbon dioxide is supplied to an inlet pass-box and an outlet pass-box for the articles to be cleaned. A cleaning chamber and a distillation column are arranged within the cleaning equipment. A condenser of the distillation column is connected to the cleaning chamber.

Abstract: A distillation column packing in the form of a spherical body constructed by assembling a pair of hemispherical members of the same shape and structure. Each of the hemispherical members includes a suitable number of cutout openings formed in the hemispherical surface portion thereof to leave covering portions, a plurality of mating assembly posts and tubes formed in the hollow inside of the hemispherical member, and reinforcing and gas-liquid contact area increasing contact pieces formed to connect the posts and the tubes with one another but not to close the hollow inside of the hemispherical member. The packing thus constructed is best suited for use in distillation columns.

Abstract: A distillation column packing in the form of a spherical body constructed by assembling a pair of hemispherical members of the same shape and structure. Each of the hemispherical members includes a suitable number of cutout openings formed in the hemispherical surface portion thereof to leave covering portions, a plurality of mating assembly posts and tubes formed in the hollow inside of the hemispherical member, and reinforcing and gas-liquid contact area increasing contact pieces formed to connect the posts and the tubes with one another but not to close the hollow inside of the hemispherical member. The packing thus constructed is best suited for use in distillation columns.