Spectra Cryogenic Systems Pvt Ltd

सामान्य जानकारी

Cryogenic grinding of spices is a method of powdering spices/herbs at sub zero temperatures ranging from 0 to minus 196 0C.the spices are frozen with liquid nitrogen, as they are being ground. This process does not damage or alter the chemical composition of the spices in any way. Normal grinding process which does not use a cooling system can reach up to 200 0C temp. This high temperature can reduce volatile components and heat sensitive constituents in spices.

The material is feed into a feeder hopper and dropped into a conveyor when the material to be processed enters the pre-chilled conveyor; liquid nitrogen is sprayed and blended directly onto the material. The material is conveyed via a stainless steel special design auger. The auger not only transports the grinding media, but also mixes with liquid nitrogen for greater cooling efficiencies.

The liquid nitrogen, a cryogenic fluid with a boiling temperature of – 196°C absorbs heat from the material and vaporized to a gaseous state. The nitrogen gas exits the system conveying the process heat away from the process
Liquid nitrogen is added until the temperature of the material is reduced to a predetermined set point. This set point is the glass transition temperature of the material finally the brittle material enters an impact (pin) mill where it is ground to a desired particle size. Computer controls the entire process of cryogenic grinding system.