Soft measurement method for PVC water content of PVC drying device

• Main Authors: SU BAOYU, KANG SHUO, CHEN XIANGGUI, MENG QINGXIN, ZHANG SHUAIJIE, ZANG CHUNHUA, MA CHUANSHAN, KONG QINGRU, ZANG BOFENG
• Format: Patent
• Language: Chinese; English
• Published: 04.11.2022
• Subjects: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; MAKING GRANULES OR PREFORMS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

A PVC water content soft measurement method of a PVC drying device belongs to the technical field of PVC drying automatic control, and comprises the following steps: step S01, establishing an energy balance model of each bed chamber of the PVC drying device; s02, calculating the average working efficiency of each bed chamber according to the number of tubes and the air volume of each bed chamber; s03, estimating the PVC water content of each bed chamber according to the one-bed one-chamber working efficiency, the one-bed two-chamber working efficiency and the two-bed working efficiency; step S04, energy balance model parameters of each bed chamber are solved; s05, solving a one-bed one-chamber PVC water content soft measurement model, a one-bed two-chamber PVC water content soft measurement model and a two-bed PVC water content soft measurement model; and step S06, obtaining the PVC water content of each bed chamber of the drying device. The PVC water content can be detected in real time to guide the producti