Low temperature waste crushing system taking advantage of cold shortness
US6334332B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2000 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | Jun 8, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A low temperature waste crushing system including a low temperature freezing section for cooling waste material below the cold shortness transition temperature by receiving a supply of refrigeration from a heat sink, and a crushing section for crushing the material cooled in the low temperature freezing section by taking advantage of cold shortness. The low temperature freezing section is configured in dual steps, the preceding step being supplied with the higher temperature refrigeration of the first refrigerating cycle and the succeeding step being supplied with the lower temperature refrigeration of the second refrigerating cycle. The heat sink is configured in a binary refrigeration cycle including a first cycle of ammonia refrigerant for obtaining the first refrigeration temperature, which is higher that the cold shortness transition temperature; and a second cycle of hydrocarbon refrigerant for obtaining a second refrigeration temperature, which is lower in temperature that the cold shortness transition temperature. The device is able to reduce the burden to the environment in comparison with prior art cooling systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.