Inventors:
Robert A. Shatten - Arlington MA, 02474
John Carrier - Arlington MA, 02476
Johnny Dean Jackson - Sandy Hook CT, 06482
International Classification:
F25B 100
Abstract:
A system and method for cooling a material with liquefied natural gas where liquefied natural gas and the material to be cryogenically cooled are brought into direct or indirect contact and cooled material and a combination of liquefied natural gas and natural gas are removed. Cooling may also employ an intermediate cooling medium such as a refrigerant or nitrogen. In the case of converting rubber in tires to rubber crumb, cooling of the products of a hammer mill and a fine grind mill by nitrogen subsequent to the cooling of nitrogen by a refrigerant and the refrigerant by liquefied natural gas converts shredded tires into recyclable rubber crumb.
