Continuous flash-evaporation type fluidized drying bed for drying chlorinated polyethylene

Abstract

The invention provides a continuous flash-evaporation type fluidized drying bed for drying chlorinated polyethylene, which can effectively prevent the softening and caking of the chlorinated polyethylene, has short production period, low labor intensity and low energy consumption, and easily realizes automatic operation.

Description

technical field [0001] The invention relates to a drying equipment for chlorinated polyethylene. Background technique [0002] In the production process of chlorinated polyethylene, the current drying process mainly adopts airflow drying and intermittent fluidized bed drying. Specifically, the centrifuged material enters the airflow drying pipe through the feeder, and the air is heated by steam through the heat exchanger. Then it enters the bottom of the airflow drying tube, the high-speed hot airflow accelerates the added powdery wet material and suspends it dispersedly in the airflow, and completes the drying of the surface moisture of the wet material during the process of airflow acceleration and transportation, and the surface moisture is partially removed The dropped material enters the fluidized bed dryer, the air is heated by the steam through the heat exchanger, and then sent to the bottom of the fluidized bed through the distribution plate to contact with the solid...

AI Technical Summary

Problems solved by technology

[0002] In the production process of chlorinated polyethylene, the current drying process mainly adopts airflow drying and intermittent fluidized bed drying. Specifically, the centrifuged material enters the airflow drying pipe through the feeder, and the air is heated by steam through the heat exchanger. Then it enters the bottom of the airflow drying tube, the high-speed hot airflow accelerates the added powdery wet material and suspends it dispersedly in the airflow, and completes the drying of the surface moisture of the wet material during the process of airflow acceleration and transportation, and the surface moisture is partially removed The dropped material enters the fluidized bed dryer, the air is heated by the steam through the heat exchanger, and then sent to the bottom of the fluidized bed through the distribution plate to contact with the solid material to form a fluidized state and achieve the heat and mass exchange of the gas-solid phase; Although this way of drying chlorinated polyethylene can meet the product requirements, because the powdered chlorinated polyethylene is easy to soften and agglomerate when it exceeds 65°C, it is very easy to cause the bed to agglomerate and cause the bed to die. It is necessary to continuously adjust the chlorinated polyethylene during production. The fluidized bed drying temperature of ethylene, so the production cycle is long, the labor intensity is high, the energy consumption is high, and the operation is inconvenient

Images