Method and apparatus for removing polymer volatile component

Abstract

The invention provides a method for the desorption of volatile component in polymer and a device thereof; the device comprises a shell and a rotor which is filled with ring-shaped filler; a polymer feeding duct enters the filler from a material inlet of the shell, one end of a pipeline is provided with a material distributor which extends into a hollow cavity of the filler, and the distributor isprovided with a plurality of outlets that are corresponding to a liquid receiving ring arranged at the inner side of the cavity of the filler along the direction of vertical height; the filler is concentric ring-shaped multilayer assembly sizing filler. Liquid polymer is transported into the hollow cavity of the filler to be evenly distributed in the hollow cavity of the filler in a layering way along the axial direction, the rotating speed of the rotor is adjusted to lead the supergravity level of the rotor to reach 30-1000g, and the liquid polymer flows through the filler from the cavity towards outside according to the customizing path of the sizing filler. In the supergravity environment, the invention doses not need to desorb gas by enforcing polymer fluid to flow through the filler according to the changing path of the sizing filler, strengthening the interface to update and producing local perturbation, thus simplifying the process and having high devolatilization rate.

Description

technical field [0001] The invention relates to a method and a device for removing volatile components from polymers, in particular to a method and a device for removing volatile components from high-viscosity polymers using supergravity technology. Background technique [0002] Devolatilization is a process of separating low molecular weight components (commonly referred to as "volatiles") from the polymerization system. The volatiles in the liquid are quickly transferred to the gas phase, but the volatiles in the deep liquid need to be separated from the liquid phase at the interface and transferred to the gas phase through diffusion, so the transfer rate of the volatiles becomes the control step to control the rate of volatilization. At a constant temperature, there are three ways to increase the transfer rate of volatiles. One is to make the liquid film thinner and shorten the diffusion distance. The second is to increase the turbulent intensity of the liquid, so that t...

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Problems solved by technology

But the main problem of this invention is: this devolatilization method adopts gas-liquid mass transfer process devolatilization, needs to pass into desorption gas, there is the problem of separation of desorption gas and volatile matter, the process is relatively complicated; filler adopts general open amorphous Metal foam, the fluid flows directly through the filler in the radial direction under the action of centrifugal force, the fluid path is short, and the efficiency of volatile separation from the liquid phase is not high enough; in addition, the liquid polymer is sent into the central chamber through a delivery tube, completely relying on centrifugal force Transported from the chamber to the packing, for the horizontal structure of the rotating bed, the liquid polymer can basically be uniformly distributed along the full height of the packing axially, however, for the vertical rotating bed with more practical application value, the liquid distribution structure is difficult Ensure that polymers with high viscosity and poor fluidity enter the packing layer evenly along the full height of the packing, thereby affecting the devolatilization efficiency

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