Hitachi, Ltd.

Hideharu Mori

Masakatsu Hayashi

Tsutomu Hasegawa

Yoshiyuki Takamura

Tatsuji Katoh

Masahiro Yamazaki

Shozi Koyama

An apparatus for sorting plastic pieces by specific gravity sorting includes a vessel containing water and having an inlet for plastic pieces to be sorted, a device for introducing plastic pieces to be sorted into the vessel through the inlet, a device for removing air bubbles from the plastic pieces within the water, and a device for moving the plastic pieces within the water in the vessel to allow the various plastic pieces to be sorted within the water due to the different specific gravities of the plastic pieces. A method of sorting plastic pieces by specific gravity sorting with the apparatus is also described.

Apparatus and method for density separation of plastics

A waste disposal system includes a stock yard for storing waste articles, a pre-treatment apparatus for separating a metal bulk from each waste article fed from the stock yard, a cryogenic crushing apparatus for crushing the separated metal bulk, and a crushing apparatus for crushing the portion of the waste article other than the metal bulk. The system further includes a light-weight article separating apparatus for separating the crushed waste from said crushing apparatus into foamed material and other wastes, and a foaming agent collecting apparatus which separates the foamed material into solid plastics and gaseous foaming agent and then cools and liquefies the gaseous foaming agent.

System and method for disposing waste

System for disposing waste

A gas separating method and a gas separating apparatus according to the present invention effectively carry out the generation of the cryogenic effect within a plant for separating and extracting valuable gases such as nitrogen, oxygen, argon or the like from raw gas. For this purpose, the arrangement is such that low temperature gas within a process is subjected to a thermal exchange with the raw gas in a heat exchanger and is thermally restored; the thus restored gas is fed to a booster driven by an expansion turbine to be pressurized therein; the thus pressurized gas is cooled to the normal temperature by a cooler; the cooled gas is further cooled in the heat exchanger; and the still lower temperature gas is supplied to the expansion turbine to be adiabatically expanded, thereby generating the cryogenic effect.

Method and apparatus for separating of product gas from raw gas

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Tokyo, Japan

Hideharu Mori