B - Operations – Transporting – 02 – C
Patent
B - Operations, Transporting
02
C
B02C 23/00 (2006.01) B02C 19/18 (2006.01) F25B 7/00 (2006.01) F25D 13/06 (2006.01)
Patent
CA 2310823
The present invention is a low temperature waste crushing system which is able to reduce the burden to the environment in comparison with the prior art of cooing by liquid nitrogen. It is composed of a low temperature freezing section for cooling waste material below their cold shortness transition temperature by receiving supply of cold heat from a cold heat source and a crushing section for crushing the material cooled in the low temperature freezing section by taking advantage of cold shortness, so as to enable bringing efficiency to cooling by adopting stepwise cooling and enable effective removal of heat, and is characterized in that the cold heat source is configured as a binary refrigerating cycles combining the first refrigerating cycle of ammonia refrigerant for obtaining the first cold heat higher in temperature than the cold shortness transition temperature and the second refrigerating cycle of ethane refrigerant for obtaining the second cold heat lower in temperature than the cold shortness transition temperature, the low temperature freezing section is configured as a dual steps cooling section, the preceding and succeeding step, each of which receives cold heat of different temperatures, and the preceding step of the dual steps cooling section is supplied with the higher temperature cold heat of the first refrigerating cycle and the succeeding step is supplied with the lower temperature cold heat of the second refrigerating cycle.
Hirano Yukio
Hirao Yasuhiro
Ito Kazutoshi
Matsuda Seiichiro
Yamamoto Makoto
Gowling Lafleur Henderson Llp
Mayekawa Mfg. Co. Ltd.
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