CN-224221173-U - Shearing defoaming stirrer for isoprene rubber production

CN224221173UCN 224221173 UCN224221173 UCN 224221173UCN-224221173-U

Abstract

The utility model discloses a shearing defoaming stirrer for isoprene rubber production, which comprises a tank body and a stirring assembly, wherein a feed inlet and an air outlet are formed in the upper portion of the tank body, a discharge outlet is formed in the lower portion of the tank body, the stirring assembly comprises a motor unit, a stirring main shaft, shearing blades, spiral stirring blades and an inner cylinder, the plurality of shearing blades are arranged on the stirring main shaft and are arranged at different heights, the spiral stirring blades are arranged on the stirring main shaft, the inner cylinder is arranged outside the shearing blades and the spiral stirring blades, and the inner cylinder is fixed on the inner wall of the tank body through a connecting plate. The utility model eliminates foam by shearing force generated by mechanical stirring, adopts a multi-layer shearing defoaming scheme, has the advantage of high defoaming efficiency, and can form circulation in the defoaming tank by arranging the spiral stirring blades and the inner cylinder so as to reduce the influence of foam dead zones. Furthermore, a filter plate is arranged on the top layer of the defoaming tank, so that the top foam can be filtered and separated.

Inventors

SHEN ZHILONG
JIANG JIAN
Ke Kangwen
MAO HAIYONG

Assignees

广东鲁众华新材料有限公司

Dates

Publication Date: 20260512
Application Date: 20250609

Claims (7)

1. The shearing defoaming stirrer for isoprene rubber production comprises a tank body and a stirring assembly, and is characterized in that the tank body is of a rotary cavity structure, a feed inlet and a gas outlet are formed in the upper portion of the tank body, a discharge hole is formed in the lower portion of the tank body, the stirring assembly comprises a motor unit, a stirring main shaft, shearing blades, spiral stirring blades and an inner cylinder, the motor unit is arranged at the top of the tank body, the top of the stirring main shaft extends out of the tank body to be connected with the motor unit, a plurality of shearing blades are arranged on the stirring main shaft and are arranged at different heights, spiral stirring blades are arranged on the stirring main shaft, the inner cylinder is arranged on the outer sides of the shearing blades and the spiral stirring blades, and the inner cylinder is fixed on the inner wall of the tank body through a connecting plate.
2. The shearing defoaming stirrer for isoprene rubber production according to claim 1 is characterized in that two shearing blades are respectively arranged at the bottom and the middle area of the tank body, the shearing blades are disc-shaped, upward and downward shearing fins are arranged at the edges of the shearing blades, and the upward and downward shearing fins are staggered.
3. The shear defoaming stirrer for isoprene rubber production according to claim 2, wherein a spiral stirring blade is provided in the region between the two shearing blades and in the upper region of the middle shearing blade, and the spiral rotation directions of the two sections of spiral stirring blades are the same.
4. A shear defoaming agitator for isoprene rubber production according to claim 3, wherein the inner cylinder is coaxial with the main shaft, the bottom of the inner cylinder is higher than the bottom shear blades, and the top is level with or lower than the top of the upper helical stirring blades.
5. The shearing defoaming stirrer for isoprene rubber production according to claim 4, wherein a plurality of windows are arranged on the side wall of the inner cylinder at the height of the middle shearing blade, and a filter screen is arranged at the windows.
6. The shearing defoaming stirrer for isoprene rubber production according to claim 4 is characterized in that a plurality of needle plate units are vertically arranged in the area between the inner cylinder and the tank body, each needle plate unit comprises a needle plate and a connecting rod, the needle plates are vertically arranged and fixed on the inner wall of the tank body through the connecting rod, gaps are formed between the two sides of the needle plates and the inner wall and the outer wall of the tank body, and the two sides of the needle plates are provided with evenly arranged spines.
7. The shearing defoaming stirrer for isoprene rubber production according to claim 4 is characterized in that a filter plate is arranged at the upper part of an inner cavity of the tank body and comprises a bottom plate, a liquid outlet filter plate and a guide plate, wherein the filter plate is a local annular plate with a central angle in the range of 60-120 degrees, the outer side of the filter plate is fixed on the inner wall of the tank body, the filter plate is obliquely arranged in the horizontal direction, the angle of 10-20 degrees is the angle, the liquid outlet filter plate is arranged at one side of the higher height of the filter plate, the guide plate is connected to the end part of the liquid outlet filter plate, which is close to the axis of the tank body, the guide plate is a bent plate, the more far away from the axis of the tank body, the other end of the guide plate is bent towards the liquid outlet filter plate, a gap is formed between the other end of the guide plate and the bottom plate, and the bottom plate are fixed, and micropores are formed in the bottom plate in the area between the liquid outlet filter plate and the filter plate and used for filtering and eliminating foam.

Description

Shearing defoaming stirrer for isoprene rubber production Technical Field The utility model relates to the technical field of isoprene rubber production, in particular to a shearing defoaming stirrer for isoprene rubber production. Background Isoprene rubber (fully known as cis-1, 4-polyisoprene rubber) is a general synthetic rubber synthesized by a solution polymerization method by taking isoprene as a monomer, and has a molecular structure which is highly similar to that of natural rubber and is known as "synthetic natural rubber". The material has excellent elasticity, wear resistance, cold resistance and chemical stability, and can be widely applied to the fields of tires, rubber pipes, sealing elements and the like. The production process mainly comprises polymerization reaction, catalyst residue removal, dehydration drying, molding packaging and the like. In isoprene rubber production, defoaming is a key link for guaranteeing product quality. If bubbles generated in the polymerization reaction, the flowing process of intermediate products in a production line and the like are not eliminated in time, the quality of products can be influenced, for example, the stability of a drying process is influenced, and the pore defects of the finished products are caused to reduce the mechanical strength, the compactness and the like of rubber. The main current defoaming means comprise chemical defoaming and mechanical defoaming, wherein the chemical defoaming reduces the surface tension of a system by adding a silicon/ether-containing defoaming agent, but the foreign substances are easy to react with rubber molecules in a side way, meanwhile, the residual defoaming agent also can influence a final product, and the problems of low defoaming efficiency, easiness in forming a foam dead zone in a container area and the like exist in a traditional stirring device (such as a rake type and a brush type defoamer). Disclosure of Invention The utility model aims to provide a shearing defoaming stirrer for isoprene rubber production, which is used for solving the problems in the prior art. The technical scheme of the utility model provides a shearing defoaming stirrer for isoprene rubber production, which comprises a tank body and a stirring assembly, wherein the tank body is of a rotary cavity structure, a feed inlet and a gas outlet are formed in the upper portion of the tank body, a discharge outlet is formed in the lower portion of the tank body, the stirring assembly comprises a motor unit, a stirring main shaft, shearing blades, spiral stirring blades and an inner cylinder, the motor unit is arranged at the top of the tank body, the top of the stirring main shaft extends out of the tank body and is connected with the motor unit, a plurality of shearing blades are arranged on the stirring main shaft, the shearing blades are arranged at different heights, spiral stirring blades are arranged on the stirring main shaft, the inner cylinder is arranged on the outer sides of the shearing blades and the spiral stirring blades, and the inner cylinder is fixed on the inner wall of the tank body through a connecting plate. Further, the number of the shearing blades is two, and the shearing blades are respectively arranged at the bottom and the middle area of the tank body. The shearing blades are disc-shaped, upward and downward shearing wings are arranged at the edges of the shearing blades, and the upward and downward shearing wings are staggered. Further, a spiral stirring blade is arranged in the area between the two shearing blades and the upper area of the middle shearing blade, and the spiral rotation directions of the two sections of spiral stirring blades are the same. Further, the inner cylinder is coaxial with the stirring main shaft, the bottom of the inner cylinder is higher than the bottom shearing blades, and the top of the inner cylinder is flush with or lower than the top of the spiral stirring blades on the upper part. Further, a plurality of windows are arranged on the side wall of the inner cylinder at the height of the middle shearing blade, and a filter screen is arranged at the windows. Furthermore, a plurality of needle plate units are vertically arranged in the area between the inner cylinder and the tank body, each needle plate unit comprises a needle plate and a connecting rod, the needle plates are vertically arranged and fixed on the inner wall of the tank body through the connecting rods, gaps are formed between the two sides of the needle plates and the inner wall and the outer wall of the tank body, and spines which are uniformly arranged are arranged on the two sides of the needle plates. Further, the upper part of the inner cavity of the tank body is provided with a filter plate, the filter plate comprises a bottom plate, a liquid outlet filter plate and a guide plate, the filter plate is a local annular plate with a central angle in the range of 60-120 degrees, the outer side of the filter plat