Method for controlling particles distribution by adopting electric field and gas phase polymerization fluidized bed reactor

• Main Authors: DONG KEZENG, WANG YULIANG, WANG JINGDAI, YANG YONGRONG, ZHU ZICHUAN, HUANG ZHENGLIANG, JIANG BINBO
• Format: Patent
• Language: Chinese; English
• Published: 17.10.2012
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention discloses a method for controlling particles distribution in a gas phase polymerization reaction system by adopting electric fields. The particles distribution is controlled by the application of the electric field including a first electric field and a second electric field whose directions are in parallel with the direction of gas flow, the first electric field and the second electric field being in opposite direction, so as to control the movement of particles, especially small particles, thereby realizing selective discharging and at the same time, decreasing entrainment of the small particles and reducing sizes of air bubbles. The invention also discloses a gas phase polymerization fluidized bed reactor to realize the method. The gas phase polymerization fluidized bed reactor comprises a base, a straight tube reaction section and a expansion section of a catalyst inlet arranged in the middle part of the reactor, one end of the straight tube reaction section being connected with the base, th