Hitachi, Ltd.

Kazuo Sakaguchi

Masakatsu Hayashi

Chikao Oda

Yoshiyuki Takamura

Nobuo Kimura

Noritaka Terayama

Kazuo Makino

Kichiji Uchiyama

A system including a method and an apparatus is disclosed for effectively separating a foamed heat-insulating material, such as insulated wall sections from used refrigeration equipment, into a foaming gas and a heat-insulating resin without any alteration and recovering them. A peeling portion for peeling a foamed heat-insulating material from a composite material containing the foamed heat-insulating material is included in a crusher provided with a high speed rotor having a plurality of hammers and a casing surrounding the rotor. A sorting portion is provided for sorting the foamed heat-insulating material with a tilting type wind force sorter having a limited tilting angle and a limited height of a wind tunnel. A pulverizing portion is provided for pulverizing the sorted foamed heat-insulating material and for separating a foaming gas therefrom. A condensing portion is provided for cooling and liquefying the separated foaming gas. A compressor is provided for compressing the pulverized non-foaming gas portions of the heat-insulating material for reducing the volume thereof. These recovery steps are accomplished without permitting escape of the foaming gas to the outside of the system.

Method of and apparatus for recovering foaming gas of the foamed material

Growing community of inventors

Kudamatsu, Japan

Kazuo Sakaguchi