Vacuumizing device of double-screw extruder

Abstract

The invention discloses a vacuumizing device of a double-screw extruder. The vacuumizing device comprises a vacuum extraction section located at the rear end of the double-screw extruder; a vacuum chamber is formed in the top of an extraction port of the vacuum extraction section; a first vacuumizing pipe is assembled at an extraction port of the vacuum chamber; and the outer wall of the first vacuumizing pipe is wrapped with a heating jacket. The vacuumizing device further comprises a vacuum pump and a vacuum tank; the outer wall of the vacuum tank is wrapped with a second heating jacket; a draining valve is arranged at the bottom of the vacuum tank; liquid is stored in the vacuum tank; and in the vacuum tank, a steel-wire screen is arranged above the liquid. The vacuumizing device has the advantages that the steel-wire screen in the vacuum tank can enable low-molecular weight substances to be agglomerated on the steel-wire screen instead of in the vacuum pump, and the low-molecular weight substances cannot be agglomerated on the first vacuumizing pipe or the vacuum tank due to the second heating jacket outside the vacuum tank and the heating jacket outside the first vacuumizing pipe, so that the working efficiency is ensured, and the product quality is improved.

Description

technical field [0001] The present application relates to a twin-screw extruder, in particular to a vacuum device for a twin-screw extruder. Background technique [0002] Traditional twin-screw extruders are all single-vacuum systems. For materials with less volatiles, single-vacuum systems can better extract low-molecular substances in materials by using their limited negative pressure. However, as low-molecular substances in modified materials The traditional single-vacuum system can no longer satisfy the increase of substances, thus a double-vacuum port system is derived. However, for the vacuum tanks of the double-vacuum system, the vacuum tanks of the single-vacuum system are still used. [0003] For materials with more volatiles, when using a dual vacuum system for extraction, most of the low molecular substances will be absorbed by water in the vacuum tank, and the remaining low molecular substances will be condensed in the air inlet of the vacuum tank, piping and vac...

AI Technical Summary

Problems solved by technology

[0002] Traditional twin-screw extruders are all single-vacuum systems. For materials with less volatiles, single-vacuum systems can better extract low-molecular substances in materials by using their limited negative pressure. However, as low-molecular substances in modified materials The increase of material, the traditional single vacuum system can no longer satisfy, thus derived the double vacuum port system, but for the vacuum tank of the double vacuum system, the vacuum tank of the single vacuum system is still used

[0003] For materials with more volatiles, when using a dual vacuum system for extraction, most of the low molecular substances will be absorbed by water in the vacuum tank, and the remaining low molecular substances will be condensed in the air inlet of the vacuum tank, piping and vacuum pump. Lead to poor vacuum extraction effect and affect product quality

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