Catalyst solution storage system
By designing a catalyst solution storage system, the problems of high transport resistance and easy deterioration of metallocene catalysts were solved, achieving efficient output and stable supply, and improving the utilization efficiency and stability of metallocene catalysts.
Patent Information
- Application Number
- CN202423235549.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-25
AI Technical Summary
In pilot-scale tests, the increased transport resistance of the metallocene catalyst led to low catalyst output efficiency. Furthermore, impurities could cause insufficient pump intake, and the metallocene catalyst was susceptible to deterioration due to water and oxygen.
A catalyst solution storage system was designed, including a storage tank, a feed pipe, a discharge pipe, a pump body, a filter, and an inert atmosphere control component. The filter is installed on the feed pipe, and the pump body is installed on the discharge pipe. The inert atmosphere control component maintains an inert gas environment inside the storage tank. The discharge pipe adopts a hook-shaped feed section to reduce the impact of impurities, and a waste liquid discharge pipe is provided to facilitate the cleaning of impurities.
It achieves efficient output of catalyst solution, reduces transport resistance, improves output efficiency, and prevents catalyst deterioration through inert gas protection, thus ensuring a stable supply of catalyst.
Smart Images
Figure CN223765216U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chemical equipment technology, and in particular to a catalyst solution storage system. Background Technology
[0002] Metallocene catalysts, due to their extremely high catalytic activity, have gained increasing market share in the petrochemical industry in recent years, becoming a research hotspot and an important direction for industrial development in the polyolefin field. In pilot-scale tests of solution-based polyolefin processes using metallocene catalysts, the high polymerization activity of metallocenes typically requires only a small amount of catalyst to achieve polymerization requirements. Excessive injection can lead to polymer precipitation and agglomeration, as well as increased heat release during polymerization. Therefore, in pilot-scale tests, a small-flow pump is sufficient to meet the flow requirements of the metallocene catalyst. Before injection, the metallocene catalyst needs to be filtered to reduce the impact of impurities on the test results. Improper filter placement can increase the transport resistance of the metallocene catalyst, potentially leading to insufficient pump intake and low catalyst output efficiency. Utility Model Content
[0003] The purpose of this invention is to propose a catalyst solution storage system that has low transport resistance and high catalyst solution output efficiency when outputting the catalyst solution.
[0004] To achieve the above objectives, this utility model provides a catalyst solution storage system, including a storage tank, an inlet pipe, an outlet pipe, a pump body, a filter, and an inert atmosphere control component;
[0005] Both the feed pipe and the discharge pipe are connected to the storage tank, and both the feed pipe and the discharge pipe are in communication with the inner cavity of the storage tank.
[0006] The pump body is mounted on the discharge pipe;
[0007] The filter is installed on the feed pipe;
[0008] The inert atmosphere control component is connected to the liquid storage tank, and the inert atmosphere control component is used to keep the inner cavity of the liquid storage tank in an inert gas environment.
[0009] In a specific embodiment of this utility model, the discharge pipe includes a main pipe section, an extension section, and a feed section. One end of the extension section is connected to and conducts through the main pipe section along its length direction, and the other end is connected to and conducts through the feed section. The main pipe section is located outside the liquid storage tank, and the extension section and the feed section are both located inside the liquid storage tank. The pump body is disposed on the main pipe section.
[0010] The feed section is in the shape of an upward-curving hook.
[0011] In a specific embodiment of this utility model, one end of the feed pipe along its length is located inside the inner cavity of the liquid storage tank, and the other end is located outside the liquid storage tank. In the radial direction of the liquid storage tank, the end of the feed pipe located inside the inner cavity of the liquid storage tank and the feed section are respectively located on both sides of the extension section.
[0012] In a specific embodiment of this utility model, in the axial direction of the liquid storage tank, one end of the feed pipe located inside the inner cavity of the liquid storage tank is positioned above the feed section.
[0013] In a specific embodiment of this utility model, the feed pipe is provided with a first valve, and the discharge pipe is provided with a second valve.
[0014] In a specific embodiment of this utility model, the catalyst solution storage system further includes a waste liquid discharge pipe, which is connected to the bottom of the storage tank and is in communication with the bottom of the inner cavity of the storage tank.
[0015] In a specific embodiment of this utility model, the bottom surface of the inner cavity of the liquid storage tank is a downwardly concave curved surface.
[0016] In a specific embodiment of this utility model, a third valve is provided on the waste liquid discharge pipe.
[0017] In a specific embodiment of this utility model, the inert atmosphere control component includes an inlet pipe and an exhaust pipe. The inlet pipe is connected to the liquid storage tank, with one end of the inlet pipe located in the middle of the inner cavity of the liquid storage tank and the other end located outside the liquid storage tank. The exhaust pipe is connected to the liquid storage tank and communicates with the top of the inner cavity of the liquid storage tank.
[0018] In a specific embodiment of this utility model, the intake pipe is provided with a fourth valve, and the exhaust pipe is provided with a fifth valve.
[0019] This utility model provides a catalyst solution storage system, which has the following advantages compared with the prior art:
[0020] The catalyst solution storage system of this utility model is used to store catalyst solution. When the catalyst solution is used, it is transported to the inner cavity of the storage tank through the feed pipe. When the catalyst solution needs to be transported to the test container, the pump works to output the catalyst solution from the inner cavity of the storage tank through the discharge pipe. When the catalyst solution is transported to the inner cavity of the storage tank, the filter can filter the catalyst solution to reduce impurities in the catalyst solution. In addition, since the filter is located on the feed pipe and the pump is located on the discharge pipe, the catalyst solution is not affected by the filter during the output process through the discharge pipe. The resistance of the catalyst solution when output through the discharge pipe is relatively small, thus the output efficiency of the catalyst solution is relatively high.
[0021] In addition, the catalyst solution storage system also includes an inert atmosphere control component, which can keep the inner cavity of the storage tank in an inert gas environment. This allows the catalyst solution to be protected by inert gas and isolated from water and oxygen, thus preventing the catalyst solution from deteriorating. Attached Figure Description
[0022] Figure 1 This is a structural diagram of the catalyst solution storage system according to an embodiment of the present invention;
[0023] Figure 2 This is a structural diagram of the extension section and the feeding section in the discharge pipe of this utility model embodiment.
[0024] In the diagram, 1 is the storage tank; 2 is the feed pipe; 3 is the discharge pipe; 31 is the main pipe section; 32 is the extension section; 33 is the feed section; 4 is the pump body; 5 is the filter; 6 is the inert atmosphere control component; 61 is the air inlet pipe; 62 is the exhaust pipe; 7 is the waste liquid discharge pipe; 10 is the first valve; 20 is the second valve; 30 is the third valve; 40 is the fourth valve; and 50 is the fifth valve. Detailed Implementation
[0025] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0026] like Figure 1 As shown, a catalyst solution storage system according to an embodiment of the present invention includes a storage tank 1, an inlet pipe 2, an outlet pipe 3, a pump body 4, a filter 5, and an inert atmosphere control component 6. The inlet pipe 2 and the outlet pipe 3 are both connected to the storage tank 1 and are in communication with the inner cavity of the storage tank 1. The pump body 4 is installed on the outlet pipe 3. The filter 5 is installed on the inlet pipe 2. The inert atmosphere control component 6 is connected to the storage tank 1 and is used to keep the inner cavity of the storage tank 1 in an inert gas environment.
[0027] In practical applications, when this catalyst solution storage system is used to store catalyst solutions, the catalyst solution is transported to the inner cavity of the storage tank 1 through the feed pipe 2. When the catalyst solution needs to be transported to the test container, the pump body 4 operates to output the catalyst solution from the inner cavity of the storage tank 1 through the discharge pipe 3. The filter 5 filters the catalyst solution as it is transported to the inner cavity of the storage tank 1, reducing impurities. Furthermore, since the filter 5 is located on the feed pipe 2 and the pump body 4 is located on the discharge pipe 3, the catalyst solution is not affected by the filter 5 during the discharge process through the discharge pipe 3, resulting in low resistance and high output efficiency. Additionally, the catalyst solution storage system includes an inert atmosphere control component 6, which maintains an inert gas environment within the inner cavity of the storage tank 1. This protects the catalyst solution from water and oxygen, preventing deterioration.
[0028] As one specific implementation of this application, the catalyst solution is a metallocene catalyst solution. When storing the metallocene catalyst solution using the catalyst solution storage system, the inert atmosphere control component 6 is first used to make the inner cavity of the storage tank 1 in an inert gas environment, and then a preset amount of metallocene catalyst solution is input into the inner cavity of the storage tank 1 through the feed pipe 2 so that the metallocene catalyst solution covers the inlet of the discharge pipe 3.
[0029] Although the catalyst solution is filtered through filter 5 before being introduced into storage tank 1, it is still difficult to guarantee that all impurities in the catalyst solution are completely filtered out. Therefore, solid impurities in the catalyst solution will deposit on the bottom surface of the inner cavity of storage tank 1. Furthermore, such as Figure 1 and Figure 2 As shown, the discharge pipe 3 includes a main pipe section 31, an extension section 32, and a feed section 33. One end of the extension section 32 is connected to and conducts through the main pipe section 31 along its length, and the other end is connected to and conducts through the feed section 33. The main pipe section 31 is located outside the storage tank 1, while the extension section 32 and the feed section 33 are both located inside the storage tank 1. The pump body 4 is mounted on the main pipe section 31. The feed section 33 is in the shape of an upwardly curved hook. Specifically, the advantage of this structure of the feed section 33 is that when the discharge pipe 3 outputs the catalyst solution, the inlet of the hook-shaped feed section 33 faces away from the bottom surface of the inner cavity of the storage tank 1, which can reduce the intake of solid impurities and protect the pump body 4.
[0030] In practical applications, to ensure a smooth supply of catalyst to the test vessel, when the catalyst solution in the inner cavity of storage tank 1 decreases to a certain level, it is necessary to replenish the catalyst solution into the inner cavity of storage tank 1 through feed pipe 2. Furthermore, as... Figure 1As shown, one end of the feed pipe 2 along its length is located inside the inner cavity of the storage tank 1, and the other end is located outside the storage tank 1. In the radial direction of the storage tank 1, the end of the feed pipe 2 located inside the inner cavity of the storage tank 1 and the feed section 33 are located on both sides of the extension section 32. The advantage of this structure is that while the discharge pipe 3 is drawing in the catalyst solution, it is also replenishing the catalyst solution into the inner cavity of the storage tank 1 through the feed pipe 2. At this time, a micro-flow circulation can be formed in the catalyst solution, which plays a certain role in mixing.
[0031] Furthermore, such as Figure 1 As shown, in the axial direction of the storage tank 1, one end of the feed pipe 2 located inside the inner cavity of the storage tank 1 is positioned above the feed section 33. At this time, the end of the feed pipe 2 located inside the inner cavity of the storage tank 1 is relatively far from the bottom surface of the inner cavity of the storage tank 1. When the feed pipe 2 inputs the catalyst solution into the inner cavity of the storage tank 1, it can reduce the disturbance to the solid impurities deposited on the bottom surface of the inner cavity of the storage tank 1.
[0032] Specifically, the feed pipe 2 is equipped with a first valve 10, which controls whether the catalyst solution is fed and adjusts the flow rate. The discharge pipe 3 is equipped with a second valve 20, which controls whether the catalyst solution is discharged. For example, both the first valve 10 and the second valve 20 are manual valves.
[0033] Furthermore, such as Figure 1 As shown, the catalyst solution storage system also includes a waste liquid discharge pipe 7, which is connected to the bottom of the storage tank 1 and is in communication with the bottom of the inner cavity of the storage tank 1. When too many solid impurities are deposited on the bottom surface of the inner cavity of the storage tank 1, the solid impurities can be discharged through the waste liquid discharge pipe 7, which facilitates the cleaning of impurities in the storage tank 1.
[0034] Furthermore, the bottom surface of the inner cavity of the liquid storage tank 1 is a downward concave curved surface. The advantage of this structure is that it can collect solid impurities and facilitate the discharge of solid impurities.
[0035] Specifically, a third valve 30 is provided on the waste liquid discharge pipe 7. The function of the third valve 30 is to control the opening and closing of the waste liquid discharge pipe 7 in order to control the discharge of waste liquid from the storage tank 1 and to discharge the deposited solid impurities. In practical applications, the third valve 30 is normally closed and is only opened when waste liquid needs to be discharged.
[0036] In this embodiment, as Figure 1As shown, the inert atmosphere control component 6 includes an inlet pipe 61 and an exhaust pipe 62. The inlet pipe 61 is connected to the liquid storage tank 1, with one end of the inlet pipe 61 located in the middle of the inner cavity of the liquid storage tank 1 and the other end located outside the liquid storage tank 1. The exhaust pipe 62 is connected to the liquid storage tank 1 and communicates with the top of the inner cavity of the liquid storage tank 1. A fourth valve 40 is provided on the inlet pipe 61, which controls the opening and closing of the inlet pipe 61. A fifth valve 50 is provided on the exhaust pipe 62, which controls the opening and closing of the exhaust pipe 62. For example, the inert gas environment is a nitrogen environment, that is, the inner cavity of the liquid storage tank 1 is in an inert gas environment. In this environment, nitrogen gas is introduced into the inner cavity of the liquid storage tank 1 through the inlet pipe 61. Specifically, the operation to create an inert gas environment in the inner cavity of the liquid storage tank 1 is as follows: first, close the first valve 10, the second valve 20, and the fifth valve 50, and open the fourth valve 40. Nitrogen gas is then introduced into the inner cavity of the liquid storage tank 1 through the inlet pipe 61. After the nitrogen gas is introduced, the fourth valve 40 is closed and the fifth valve 50 is opened. The gas in the inner cavity of the liquid storage tank 1 is discharged from the exhaust pipe 62. The above process of introducing nitrogen gas and venting gas is repeated several times. Finally, the fourth valve 40 and the fifth valve 50 are kept open, and the inlet pipe 61 continues to introduce nitrogen gas into the inner cavity of the liquid storage tank 1, thereby creating a nitrogen environment in the inner cavity of the liquid storage tank 1.
[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.
Claims
1. A catalyst solution storage system characterized by, The system comprises a liquid storage tank (1), a feeding pipe (2), a discharging pipe (3), a pump body (4), a filter (5) and an inert atmosphere control assembly (6); The feeding pipe (2) and the discharging pipe (3) are connected with the liquid storage tank (1), and the feeding pipe (2) and the discharging pipe (3) are communicated with the inner cavity of the liquid storage tank (1); The pump body (4) is arranged on the discharging pipe (3); The filter (5) is arranged on the feeding pipe (2); The inert atmosphere control assembly (6) is connected with the liquid storage tank (1), and is used for making the inner cavity of the liquid storage tank (1) in an inert gas environment.
2. The catalyst solution reservoir system of claim 1, wherein, The discharging pipe (3) comprises a main pipe section (31), an extension section (32) and a feeding section (33), one end of the extension section (32) is connected with and communicated with the main pipe section (31) along the length direction of the extension section (32), the other end of the extension section (32) is connected with and communicated with the feeding section (33), the main pipe section (31) is located outside the liquid storage tank (1), the extension section (32) and the feeding section (33) are located in the inner cavity of the liquid storage tank (1), and the pump body (4) is arranged on the main pipe section (31); The feeding section (33) is in the shape of a hook bent upward.
3. The catalyst solution reservoir system of claim 2, wherein, One end of the feeding pipe (2) is located in the inner cavity of the liquid storage tank (1) along the length direction of the feeding pipe (2), and the other end of the feeding pipe (2) is located outside the liquid storage tank (1), in the radial direction of the liquid storage tank (1), the one end of the feeding pipe (2) located in the inner cavity of the liquid storage tank (1), and the feeding section (33) are located on the two sides of the extension section (32) respectively.
4. The catalyst solution holding system according to claim 3, wherein In the axial direction of the liquid storage tank (1), the one end of the feeding pipe (2) located in the inner cavity of the liquid storage tank (1) is arranged above the feeding section (33).
5. The catalyst solution reservoir system of claim 1, wherein, A first valve (10) is arranged on the feeding pipe (2), and a second valve (20) is arranged on the discharging pipe (3).
6. The catalyst solution reservoir system of claim 1, wherein, The catalyst solution storage system further comprises a waste liquid discharge pipe (7), the waste liquid discharge pipe (7) is connected with the bottom of the liquid storage tank (1), and the waste liquid discharge pipe (7) is communicated with the bottom of the inner cavity of the liquid storage tank (1).
7. The catalyst solution reservoir system of claim 6, wherein, The bottom surface of the inner cavity of the liquid storage tank (1) is a downwardly concave curved surface.
8. The catalyst solution reservoir system of claim 6, wherein, A third valve (30) is arranged on the waste liquid discharge pipe (7).
9. The catalyst solution reservoir system of claim 1, wherein, The inert atmosphere control assembly (6) comprises an air inlet pipe (61) and an air outlet pipe (62), the air inlet pipe (61) is connected with the liquid storage tank (1), one end of the air inlet pipe (61) is located in the middle of the inner cavity of the liquid storage tank (1) along the length direction of the air inlet pipe (61), and the other end of the air inlet pipe (61) is located outside the liquid storage tank (1), the air outlet pipe (62) is connected with the liquid storage tank (1), and the air outlet pipe (62) is communicated with the top of the inner cavity of the liquid storage tank (1).
10. The catalyst solution reservoir system of claim 9, wherein, A fourth valve (40) is arranged on the air inlet pipe (61), and a fifth valve (50) is arranged on the air outlet pipe (62).