CN217834662U

CN217834662U - Polyolefin devolatilization equipment

Info

Publication number: CN217834662U
Application number: CN202221780588.3U
Authority: CN
Inventors: 杜惟实; 董仕晋
Original assignee: Wuxi Zero One Future New Material Technology Research Institute Co Ltd
Current assignee: Wuxi Zero One Future New Material Technology Research Institute Co Ltd
Priority date: 2022-07-11
Filing date: 2022-07-11
Publication date: 2022-11-18
Anticipated expiration: 2032-07-11

Abstract

The utility model relates to a take off and wave equipment technical field, especially relate to a polyolefin takes off and waves equipment, aim at solving the current device and wave the not good problem of effect to taking off of polyolefin. Aim at this mesh, this application provides a polyolefin devolatilization equipment, it has conveying section and meshing section to arrange according to certain order on the screw rod through the extruder, specifically set up to be provided with the meshing section in conveying section's front and back both ends, and select a plurality of to devolatilize the mouth at the conveying section department of the screw rod that this kind of staggered arrangement mode is constituteed, through set up the vacuum pump in devolatilization mouth department, can devolatilize the condition according to the difference, through closing or opening the connecting valve of devolatilization mouth and vacuum pump, in order to adjust which to devolatilize the mouth and be used for the vacuum devolatilization, thereby realize the function of high-efficient devolatilization.

Description

Polyolefin devolatilization equipment

Technical Field

The utility model relates to a take off and wave equipment technical field, especially relate to a polyolefin takes off and waves equipment.

Background

At present, the top-grade functionalized polyolefin bonding resin product line mainly adopts a melt reaction extrusion production process with high production efficiency, simple control and low energy consumption. However, the polymer melt reaction extrusion process has the problems of narrow window, small post-treatment space and the like, and often causes the problems of low reaction conversion rate, high residual monomer content and the like. Therefore, the deep devolatilization of the functionalized polyolefin bonding resin is important.

Accordingly, there is a need in the art for a new solution to the above problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the existing device has poor devolatilization effect on polyolefin, the application provides polyolefin devolatilization equipment, which comprises an extruder, wherein a screw rod and a conveying section are arranged inside the extruder and arranged on the discharge end of the screw rod, the conveying section is distributed at equal intervals along the axial direction of the screw rod, and a devolatilization port is arranged on the conveying section;

the meshing section is arranged on the screw and positioned between two adjacent conveying sections;

a reverse thread section between the engagement section and the delivery section.

In a preferred technical scheme of the above polyolefin devolatilization apparatus, the conveying section of the screw is a conveying screw element, the engaging section is an engaging screw element, and the reverse screw section is a reverse screw element.

In a preferred technical scheme of the above polyolefin devolatilization equipment, the screw is divided into 11 sections, the devolatilization ports are arranged on the extruder, and the number of the devolatilization ports is 4.

In the preferable technical scheme of the polyolefin devolatilization equipment, a vacuum pump for vacuum devolatilization is arranged at the devolatilization port, and a vacuum gauge is further arranged at the devolatilization port.

In the preferable technical scheme of the polyolefin devolatilization equipment, the extruder is a twin-screw extruder or a single twin-screw extruder.

In a preferable technical scheme of the polyolefin devolatilization device, the length-diameter ratio of a screw of the double-screw extruder is more than 80.

It should be noted that in the preferred technical scheme of this application, arrange according to certain order on the screw rod through the extruder and have conveying section and meshing section, specifically set up to be provided with the meshing section at conveying section's front and back both ends to select a plurality of devolatilization mouth in the conveying section department of the screw rod that this kind of staggered arrangement mode is constituteed, through set up the vacuum pump in devolatilization mouth department, can be according to different devolatilization conditions, through closing or opening the connecting valve of devolatilization mouth and vacuum pump to adjust which devolatilization mouth is used for the vacuum devolatilization, thereby realize the function of high-efficient devolatilization.

Drawings

The polyolefin devolatilization apparatus of the present application is described below with reference to the drawings. In the drawings:

FIG. 1 is a block diagram of the overall assembly of a polyolefin devolatilization apparatus of the present application.

FIG. 2 is a schematic side view of the polyolefin devolatilization apparatus of the present application.

FIG. 3 is a schematic view showing the structure of a screw portion of the polyolefin devolatilization apparatus of the present application.

In the figure:

1. an extruder; 2. a screw; 3. a conveying section; 32. devolatilizing; 33. a vacuum gauge; 34. a vacuum pump; 4. an engaging section; 5. a reverse thread segment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in combination with the following embodiments. It should be understood that the description is intended for purposes of illustration only and is not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

Based on the technical problems provided in the background art, the application provides polyolefin devolatilization equipment, which comprises an extruder, wherein a screw rod and conveying sections are arranged in the extruder, the conveying sections are arranged at the discharge end of the screw rod, the conveying sections are distributed at equal intervals along the axial direction of the screw rod, and devolatilization ports are formed in the conveying sections; the meshing section is arranged on the screw and positioned between two adjacent conveying sections; a reverse screw section at the front end of each devolatilization section. Arrange according to certain order on the screw rod through the extruder and have transport section and meshing section, specifically set up to be provided with the meshing section in the front and back both ends of transport section to select a plurality of to take off and wave the mouth at the transport section department of the screw rod that this kind of staggered arrangement mode is constituteed, through setting up the vacuum pump in taking off a mouthful department, can take off the condition according to the difference, through closing or opening the connecting valve of taking off and wave mouth and vacuum pump, take off and wave the mouth in order to adjust which and take off and be used for the vacuum and take off and wave, thereby realize the function of high-efficient taking off and wave.

Referring to fig. 1 to 3, the overall assembly of the polyolefin devolatilization apparatus of the present application will be described, wherein fig. 1 is a structural view of the overall assembly of the polyolefin devolatilization apparatus of the present application; FIG. 2 is a schematic side view of a polyolefin devolatilization apparatus of the present application; FIG. 3 is a schematic view of the screw portion of the polyolefin devolatilization apparatus of the present application.

The utility model provides a polyolefin is taken off and is waved equipment includes extruder 1, and extruder 1's inside is equipped with screw rod 2, wherein is equipped with on the output of screw rod 2 and carries section 3, carries section 3 along the equidistant distribution of axial of screw rod 2, is equipped with meshing section 4 between carrying section 3 to meshing section 4 and carrying and being equipped with reverse screw section 5 between the section 3, still being equipped with in 3 departments of carrying the section and taking off and waveing a mouthful 32.

Further, the conveying section 3, the meshing section 4 and the reverse thread section 5 which are distributed on the screw rod 2 are all threaded elements of national standards, wherein the conveying section 3 is a conveying threaded element, the meshing section 4 is a meshing threaded element, the reverse thread section 5 is a reverse threaded element, and the three are combined together according to the arrangement mode.

Further, the screw 2 comprises 11 sections in total, the devolatilization ports 32 are arranged on the extruder 1, the devolatilization ports 32 are arranged from the discharge end of the extruder 1, the number of the devolatilization ports 32 is determined according to the content of polyolefin, when the content of polyolefin is low, the number of the devolatilization ports 32 is not less than 2, and when the content of polyolefin is high, the number of the devolatilization ports 32 is more than 2, but not more than 4 at most. Specifically, the devolatilization port 32 is provided with a vacuum pump 34 and a vacuum gauge 33 for measuring a vacuum degree, and the vacuum pump 34 is connected to the devolatilization port 32 through a pipe and controls whether or not the devolatilization port 32 is used for vacuum devolatilization.

Further, the extruder 1 adopts a twin-screw extruder or a single twin-screw extruder, wherein the length-diameter ratio of the twin-screw extruder is more than 80.

The method of using the polyolefin devolatilization apparatus of the present application is described below.

This example uses a single twin screw extruder having a screw length to diameter ratio of greater than 80, preferably 48. The double screw extruder has 11 sections of cylinders, wherein the cylinder close to the discharge end is a first section 1, the screw 2 at the discharge end is a conveying section 3, the conveying sections 3 are arranged at equal intervals, meshing sections 4 are arranged between the adjacent conveying sections 3, reverse screw sections 5 are also arranged between the conveying sections 3 and the meshing sections 4, the reverse screw sections 5 can ensure that the conveying sections 3 are not communicated with other sections to cause insufficient vacuum degree, and screw elements on the screw 2 are arranged in a staggered mode according to the arrangement and combination. Wherein, be provided with devolatilization mouth 32 on the transport section 3 of barrel, put into extruder 1 with the polyolefin material to utilize screw rod 2 to mix, stir and extrude the polyolefin material, in this process, vacuum pump 34 is connected with each devolatilization mouth 32, can be through opening or closing the connecting valve between devolatilization mouth 32 and the vacuum pump 34, which devolatilization mouth 32 is used for the vacuum devolatilization according to actual conditions decision.

The screw 21 uses 48/48 large-lead conveying screw thread elements in the conveying section 3 to increase the mass transfer area of the fluid in the conveying section, and uses 45 °/5/32 or 60 °/4/32 to 90 °/5/32 meshing screw thread elements before and after the conveying section 3, and is additionally provided with 12/12L reverse screw thread elements, so that the molten fluid can better fill the barrel of the non-devolatilization section, and the vacuum degree of the devolatilization section can be better increased. On the basis, 4 devolatilization ports 32 are arranged in the double-screw extruder to the maximum extent, so that the devolatilization efficiency can be improved to the maximum extent.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modifications, equivalents, improvements and the like which are made without departing from the spirit and scope of the present invention should be considered within the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. A polyolefin devolatilization device comprises an extruder, a screw is arranged in the extruder, and is characterized in that,

the conveying section is arranged at the discharge end of the screw rod, the conveying section is distributed at equal intervals along the axial direction of the screw rod, and a devolatilization port is formed in the conveying section;

a reverse threaded section between the engagement section and the conveying section.

2. The polyolefin devolatilization apparatus as recited in claim 1 wherein said conveying section of said screw is a conveying screw element, said engaging section is an engaging screw element and said reverse screw section is a reverse screw element.

3. The polyolefin devolatilization apparatus as defined in claim 1 wherein said screws are divided into 11 segments in total, said devolatilization ports being provided on said extruder, said number of devolatilization ports being 4.

4. The polyolefin devolatilization apparatus as recited in claim 1, wherein a vacuum pump for vacuum devolatilization is provided at said devolatilization port, and a vacuum gauge is further provided at said devolatilization port.

5. The polyolefin devolatilization apparatus as claimed in claim 1, wherein said extruder is a twin screw extruder or a single twin screw extruder.

6. The polyolefin devolatilization apparatus as recited in claim 5 wherein said twin screw extruder has a screw length to diameter ratio greater than 80.