... drying process,improve the speed of heat exchanging,raw material is dried by the drier which non- ... combine water can remove completely, (for example:raw material's first moisture less than 40%,output of ... finished product can be 13.5%),raw material doesn't produce metamorphous phenomenon,output increase ... B.C benzoic acid,2.3 acid,PVC,polypropylene,sodiun sulfate,sodium pyrosulfite and so on. ...