Sampling device for olefin polymerization catalyst
By designing a sampling device for olefin polymerization catalysts with cylinder liners, pistons, and nitrogen replacement, the problem of air contact during sampling was solved, achieving efficient and complete sample acquisition and analysis.
Patent Information
- Application Number
- CN202423300586.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing olefin polymerization catalyst sampling devices are prone to contact with air due to improper operation, which can affect catalyst activity.
Design a sampling device comprising a cylinder liner, piston, compression spring, and stainless steel, which achieves sealed sampling through nitrogen replacement and pressure control to prevent the sample from contacting air.
It achieves an efficient and complete sampling and discharge process under nitrogen protection, ensuring that the catalyst activity is not affected.
Smart Images
Figure CN223769831U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of catalyst technology, and in particular to a sampling device for an olefin polymerization catalyst. Background Technology
[0002] Olefin polymerization catalysts have extremely strict requirements for water and oxygen. During the preparation and storage of catalysts, even trace amounts of water and oxygen can have a certain impact on the catalyst activity. After the olefin catalyst is produced and before it is prepared and packaged, it is necessary to sample and analyze the catalyst to confirm whether the parameters of the olefin polymerization catalyst meet the production requirements. Therefore, how to keep the olefin polymerization catalyst sample sealed to the greatest extent is crucial to the analysis results.
[0003] Most existing sampling devices for polyolefin catalysts use glass containers for sampling. However, improper sampling of glass containers can easily lead to contact with air, affecting catalyst activity. Utility Model Content
[0004] To address the problem of improper sampling procedures and easy exposure to air in current polyolefin catalyst sampling methods, this invention provides a sampling device for olefin polymerization catalysts.
[0005] The technical solution provided by this utility model is: a sampling device for an olefin polymerization catalyst, including a cylinder liner, a pressure cap connected to the upper part of the cylinder liner by bolts and a sealing ring, a piston provided inside the cylinder liner, the piston and the cylinder liner being connected by a clearance fit through a sealing ring, a compression spring provided at the bottom of the piston, the other end of the compression spring abutting against the bottom of the cylinder liner, a through hole B opened on the piston, a lower tube sealed and welded to the piston at the through hole B, and a valve C sealed and connected after the lower tube extends out of the cylinder liner;
[0006] The gland has a through hole A running vertically through it. An upper pipe is welded to the gland at the through hole A. Valve A and valve B are connected in parallel at the upper part of the upper pipe.
[0007] Cylinder liners, pistons, upper tubes, lower tubes, glands, valves A, B, and C are all made of stainless steel.
[0008] The beneficial effects of this utility model are as follows: the piston, cylinder liner, compression spring and lower tube form an adjustable space under pressure control, which can be opened or closed. Nitrogen replacement can be performed under nitrogen pressure, and sampling and discharge can be completed under sample pressure. The operation is simple and the sample integrity is high. Attached Figure Description
[0009] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;
[0010] Appendix Figure 2 This is a schematic diagram of the structure after sampling of this utility model.
[0011] In the diagram, 1-cylinder liner, 2-pressure cap, 3-valve A, 4-valve B, 5-valve C, 6-lower pipe, 7-piston, 8-through hole A, 9-through hole B, 10-upper pipe. Detailed Implementation
[0012] like Figures 1-2 As shown, a sampling device for an olefin polymerization catalyst includes a cylinder liner 1. The upper part of the cylinder liner 1 is connected to a pressure cap 2 by bolts and a sealing ring. A piston 7 is provided inside the cylinder liner 1. The piston 7 is connected to the cylinder liner 1 by a clearance fit through the sealing ring. A compression spring is provided at the bottom of the piston 7. The other end of the compression spring abuts against the bottom of the cylinder liner 1. A through hole B9 is opened on the piston 7. A lower tube 6 is sealed and welded to the piston 7 at the through hole B9. The lower tube 6 extends out of the cylinder liner 1 and is sealed and connected to a valve C5.
[0013] The pressure cap 2 has a through hole A8 that runs vertically through it. The pressure cap 2 is sealed and welded with an upper pipe 10 at the through hole A8. The upper pipe 10 is connected in parallel with valves A3 and B4.
[0014] Piston 7, cylinder liner 1, compression spring, and lower pipe 6 form a pressure-controlled, adjustable, openable, and closable space. During nitrogen purging, valve A3 is opened, and nitrogen pressure causes piston 7 to descend. After nitrogen fills the upper space of piston 7, valve A3 is closed, and valve C5 is opened to release nitrogen. Then, valve C5 is closed, and valves A3 and B4 are opened, allowing nitrogen to flow into the pipe above upper pipe 10 for nitrogen purging. During sampling, valve B4 is connected to the sampling port, and a sample with a certain pressure enters the upper part of piston 7. Piston 7 descends to create sampling space, and valve B4 is closed to complete sampling. During analysis, valve C5 is opened, and piston 7 rises under the action of the compression spring, allowing the sample to be removed. Throughout the entire nitrogen purging and sampling process, the sample does not come into contact with the outside.
[0015] The piston 7, cylinder liner 1, compression spring and lower tube 6 form an adjustable space that can be opened or closed under pressure control. It can be purged with nitrogen under nitrogen pressure and sampled and discharged under sample pressure. It is simple to operate and has high sample integrity.
[0016] Cylinder liner 1, piston 7, upper tube 10, lower tube 6, gland 2, valve A3, valve B4 and valve C5 are all made of stainless steel.
Claims
1. A sampling device for an olefin polymerization catalyst comprising a cylinder liner (1), characterized in that: The upper part of the cylinder sleeve (1) is connected with the gland (2) through bolts and sealing rings. The cylinder sleeve (1) is provided with a piston (7). The piston (7) is connected with the cylinder sleeve (1) through a gap fit of sealing rings. The bottom of the piston (7) is provided with a compression spring. The other end of the compression spring is abutted against the bottom of the cylinder sleeve (1). The piston (7) is provided with a through hole B (9) penetrating from top to bottom. The piston (7) is sealingly welded with a lower pipe (6) at the through hole B (9). The lower pipe (6) is sealingly connected with a valve C (5) after extending out of the cylinder sleeve (1). The gland (2) is provided with a through hole A (8) penetrating from top to bottom. The gland (2) is sealingly welded with an upper pipe (10) at the through hole A (8). The upper pipe (10) is in parallel with a valve A (3) and a valve B (4) at the upper part.
2. A device for sampling an olefin polymerization catalyst according to claim 1, characterized in that: The cylinder sleeve (1), the piston (7), the upper pipe (10), the lower pipe (6), the gland (2), the valve A (3), the valve B (4) and the valve C (5) are all made of stainless steel.