Catalyst suspension delivery system

Abstract

The utility model relates to the technical field of catalyst delivery, disclose a kind of catalyst suspension delivery system, including storage tank, first pipeline, pressurizing element, second pipeline and driving element, storage tank is used to store catalyst suspension, first pipeline is used to connect storage tank and reactor, pressurizing element is set on first pipeline, to input the catalyst suspension in storage tank into reactor, second pipeline is set to connect storage tank and first pipeline, the communication position of second pipeline and first pipeline is between pressurizing element and storage tank and the position close to pressurizing element, driving element is set on second pipeline, to drive the catalyst suspension in first pipeline is conveyed back into storage tank by second pipeline.The setting of second pipeline and driving element can increase the flow speed of catalyst suspension before entering pressurizing element, reduce the residence time of catalyst suspension before entering pressurizing element, relieve the settlement of catalyst suspension, avoid pressurizing element blockage.

Description

Technical Field

[0001] This utility model relates to the field of catalyst delivery technology, and more specifically to a catalyst suspension delivery system. Background Technology

[0002] In chemical production processes, catalysts need to be delivered to reactors to initiate polymerization reactions. To ensure uniform dispersion of the catalyst and stability of the polymerization reaction, the catalyst is usually suspended in a dispersant such as white oil to form a catalyst suspension. The catalyst suspension is then delivered to the reactor under pressure through pipelines by a pressure pump.

[0003] However, the catalyst suspension is injected into the reactor in small quantities at a low flow rate. The catalyst suspension with a low flow rate stays in the pipeline for a long time, which causes sedimentation and deposits at the inlet of the pressurization pump, resulting in blockage and interruption of the catalyst supply to the reactor.

[0004] The existing method for unclogging booster pumps mainly involves repeatedly disassembling and cleaning them. This disassembly and cleaning process not only increases the operational risks for workers and the risk of catalyst poisoning, but also wastes the catalyst. If the disassembly and cleaning is not done in time, it can lead to reaction shutdown and even cause safety accidents. Utility Model Content

[0005] The purpose of this invention is to overcome the problems in the existing technology where the main method of unblocking the pressure pump is to repeatedly disassemble and clean the pressure pump. During the disassembly and cleaning process, not only will the operation risk of the operator and the risk of catalyst poisoning increase, but it will also cause catalyst waste. If the disassembly and cleaning is not timely, it will also lead to reaction shutdown and even cause safety production accidents. This invention provides a catalyst suspension delivery system.

[0006] To achieve the above objectives, this utility model provides a catalyst suspension delivery system, comprising: a storage tank for storing a catalyst suspension; a first pipeline connecting the storage tank and a reactor; a pressurizing element disposed on the first pipeline to input the catalyst suspension from the storage tank into the reactor; a second pipeline connecting the storage tank and the first pipeline, wherein the second pipeline is positioned between the pressurizing element and the storage tank and close to the pressurizing element; and a driving element disposed on the second pipeline to drive the catalyst suspension from the first pipeline back to the storage tank via the second pipeline.

[0007] In some embodiments, the distance between the connection point and the inlet of the pressurizing element is 0-500 mm.

[0008] In some embodiments, the second pipeline is also equipped with a valve.

[0009] In some embodiments, the catalyst suspension delivery system further includes a first cooling unit disposed downstream of the drive element along the delivery direction of the catalyst suspension to cool the catalyst suspension in the second pipeline.

[0010] In some embodiments, the catalyst suspension delivery system further includes a second cooling unit for cooling the catalyst suspension in the storage tank.

[0011] In some embodiments, the second cooling unit includes: a cooling structure disposed on the outer wall of the tank; and a cooling circulation assembly storing a cooling medium and for inputting the cooling medium to the cooling structure.

[0012] In some embodiments, the catalyst suspension delivery system further includes a third pipeline configured to connect the storage tank and the first pipeline between the pressurizing element and the reactor, for delivering the catalyst suspension through the pressurizing element back to the storage tank.

[0013] In some embodiments, the catalyst suspension delivery system further includes a valve disposed on the third pipeline.

[0014] In some embodiments, the catalyst suspension delivery system further includes a stirring mechanism for stirring the catalyst suspension in the storage tank.

[0015] In some embodiments, the catalyst suspension delivery system further includes an input line for feeding the catalyst suspension into the storage tank.

[0016] Through the above technical solution, the catalyst suspension in the storage tank can be transported to the reactor through the first pipeline under the action of the pressurizing element. At the same time, by connecting the second pipeline to the first pipeline between the pressurizing element and the storage tank and close to the pressurizing element, the catalyst suspension in the first pipeline that has not entered the pressurizing element can be transported back to the storage tank. Under the action of the driving element, the flow velocity of the catalyst suspension in the first pipeline before entering the pressurizing element can be increased, reducing the residence time of the catalyst suspension before entering the pressurizing element. This avoids the problem of blockage of the pressurizing element caused by sedimentation of the catalyst suspension before entering the pressurizing element, and eliminates the need for frequent disassembly and cleaning of the pressurizing element. This avoids the risks of on-site operation and the loss of catalyst suspension due to disassembly and flushing of the pressurizing element, and avoids reaction shutdown or even safety accidents caused by disassembly and cleaning of the pressurizing element. It ensures the stable operation of the conveying system and improves the mixing effect of the catalyst suspension in the storage tank. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the catalyst suspension delivery system disclosed in this utility model.

[0018] Explanation of reference numerals in the attached figures 1. Storage tank; 2. First pipeline; 3. Pressurizing element; 4. Second pipeline; 5. Drive element; 6. Second cooling unit; 7. Third pipeline; 8. Stirring mechanism; 81. Stirring blade; 82. Stirring motor; 9. Input pipeline; 10. Valve; 11. Reactor. Detailed Implementation

[0019] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0020] The existing catalyst suspension is injected into reactor 11 in small quantities at a low flow rate. This low flow rate increases the residence time of the catalyst suspension in the pipelines and pressurization pump, making it prone to sedimentation. This sedimentation can lead to blockages at the inlet of the pressurization pump, causing an interruption in the catalyst supply to reactor 11. Existing methods of unblocking the pressurization pump by disassembling it not only increase the operational risks for workers and the risk of catalyst poisoning, but also waste the catalyst. If disassembly is not timely, it can lead to reaction shutdown and even safety accidents. Therefore, this invention provides a catalyst suspension delivery system.

[0021] See Figure 1The catalyst suspension delivery system includes a storage tank 1, a first pipeline 2, a pressurizing element 3, a second pipeline 4, and a driving element 5. The storage tank 1 is used to store the catalyst suspension. The first pipeline 2 is used to connect the storage tank 1 and the reactor 11. The pressurizing element 3 is installed on the first pipeline 2 to input the catalyst suspension in the storage tank 1 into the reactor 11. The second pipeline 4 is configured to connect the storage tank 1 and the first pipeline 2. The connection position between the second pipeline 4 and the first pipeline 2 is between the pressurizing element 3 and the storage tank 1 and close to the pressurizing element 3. The driving element 5 is installed on the second pipeline 4 to drive the catalyst suspension in the first pipeline 2 to be transported back to the storage tank 1 through the second pipeline 4.

[0022] The catalyst suspension in storage tank 1 can be transported to reactor 11 through first pipeline 2 under the action of pressurizing element 3. At the same time, by connecting second pipeline 4 to first pipeline 2 between pressurizing element 3 and storage tank 1 and near pressurizing element 3, the catalyst suspension in first pipeline 2 that has not entered pressurizing element 3 is transported back to storage tank 1. Under the action of driving element 5, the flow velocity of catalyst suspension in first pipeline 2 before entering pressurizing element 3 can be increased, reducing the residence time of catalyst suspension before entering pressurizing element 3, alleviating the sedimentation of catalyst suspension, avoiding the problem of blockage of pressurizing element 3 caused by sedimentation of catalyst suspension before entering pressurizing element 3, avoiding the interruption of catalyst supply to reactor 11, and eliminating the need for frequent disassembly and cleaning of pressurizing element 3, avoiding the risk of on-site operation and the loss of catalyst suspension caused by disassembly and flushing of pressurizing element 3, avoiding reaction shutdown or even safety production accidents caused by disassembly and cleaning of pressurizing element 3, ensuring the stable operation of the conveying system, and improving the mixing effect of catalyst suspension in storage tank 1.

[0023] The catalyst suspension flowing from storage tank 1 into the first pipeline 2 is split into two streams at the connection point. One stream continues to flow into reactor 11 through the first pipeline 2 at a predetermined rotational speed of the pressurizing element 3, while the other stream flows back into storage tank 1 through the second pipeline 4 under the action of the driving element 5. This achieves high-flow-rate circulation of the catalyst suspension, enhancing the uniform dispersion of the catalyst suspension in storage tank 1. Under the combined action of the pressurizing element 3 and the driving element 5, the flow rate of the catalyst suspension in the first pipeline 2, located between storage tank 1 and the connection point, increases, thereby reducing the residence time of the catalyst suspension in the first pipeline 2. Specifically, see... Figure 1 The first pipeline 2 connects the bottom of the storage tank 1 and the reactor 11. One end of the second pipeline 4 is connected to the connection point of the first pipeline 2, and the other end of the second pipeline 4 is connected to the top of the storage tank 1.

[0024] In some embodiments, a valve 10 is provided in the first pipeline 2 at the position between the pressurizing element 3 and the reactor 11 to control the entry of the catalyst suspension into the reactor 11.

[0025] In some embodiments, the second pipeline 4 is also provided with a valve 10. The valve 10 can control the opening and closing of the second pipeline 4.

[0026] The catalyst suspension conveying system of this invention is mainly used for conveying small-flow particulate suspension systems.

[0027] The flow rate of the catalyst suspension entering the reactor 11 can be adjusted by regulating the rotation speed of the pressurizing element 3. By adjusting the driving force of the driving element 5 and the pressurizing force of the pressurizing element 3, the driving force of the driving element 5 is prevented from being too large, which would cause the catalyst suspension that should flow into the pressurizing element 3 to flow into the first pipeline 2. While ensuring the flow rate and flow volume of the catalyst suspension input to the reactor 11, the flow rate of the catalyst suspension in the first pipeline 2 is increased by the driving element 5.

[0028] Optionally, pressurizing element 3 can be a pressurizing pump, and driving element 5 can be a pressure pump.

[0029] The pressurizing pump rotates at a predetermined speed, continuously drawing the catalyst from the storage tank 1. The drawn catalyst is pressurized in the downstream pipeline of the pressurizing pump until the pressure is greater than that of the reactor 11. Then, the valve 10 on the first pipeline 2 before entering the reactor 11 is opened, and the catalyst is injected into the reactor 11.

[0030] In some embodiments, the distance between the connection point and the inlet of the pressurizing element 3 is 0-500 mm. This arrangement ensures that the connection point between the first pipe 2 and the second pipe 4 is as close as possible to the inlet of the pressurizing element 3, thereby increasing the flow rate of the catalyst suspension entering the pressurizing element 3 and preventing the catalyst suspension from settling and clogging the pressurizing element 3.

[0031] It should be noted that the closer the distance between the connection point and the inlet of the pressurizing element 3 is to 0mm, the better the effect of increasing the flow rate of the catalyst suspension entering the pressurizing element 3. However, in order to ensure convenient and quick installation of the second pipeline 4 and the first pipeline 2, the distance between the connection point and the inlet of the pressurizing element 3 is preferably 30mm-100mm.

[0032] Solid catalyst particles are dispersed in a dispersant such as white oil to form a catalyst suspension. The catalyst suspension delivery system also includes an input pipeline 9 for inputting the catalyst suspension into the storage tank 1. The catalyst suspension is input into the storage tank 1 through the input pipeline 9 to realize the delivery and storage of the catalyst suspension.

[0033] The catalyst particles can be in the micrometer size, and the catalyst content in the catalyst suspension is about 15 wt%.

[0034] In some embodiments, a valve 10 is also provided in the input pipeline 9 to control the opening and closing of the input pipeline 9. When it is necessary to input the catalyst suspension into the storage tank 1, the valve 10 is opened, and when the input of the catalyst suspension into the storage tank 1 is stopped, the valve 10 is closed.

[0035] In some embodiments, the catalyst suspension delivery system further includes a stirring mechanism 8, which is used to stir the catalyst suspension in the storage tank 1. By stirring the catalyst suspension in the storage tank 1, the stirring mechanism 8 keeps the catalyst suspension in a uniform suspension state and prevents it from settling in the storage tank 1.

[0036] The stirring mechanism 8 includes a stirring blade 81 and a stirring motor 82. The stirring blade 81 is used to stir the catalyst suspension in the storage tank 1, and the stirring motor 82 is used to drive the stirring blade 81 to rotate. The stirring motor 82 drives the stirring blade 81 to rotate, thereby stirring the catalyst suspension in the storage tank 1 and ensuring that the catalyst suspension is maintained in a uniform suspension state.

[0037] During the stirring process of the catalyst suspension in storage tank 1, the stirring mechanism 8 generates heat, causing the catalyst suspension in storage tank 1 to heat up. Due to seasonal factors and equipment operation, storage tank 1 is in a high-temperature environment, which further increases the temperature of the catalyst suspension. This increased temperature accelerates the sedimentation of the catalyst suspension, exacerbating the blockage problem at the inlet of the pressurizing element 3. Therefore, the catalyst suspension conveying system also includes a second cooling unit 6, which is used to cool the catalyst suspension in storage tank 1. By cooling the catalyst suspension in storage tank 1, the temperature of the catalyst suspension in storage tank 1 can be effectively reduced, alleviating catalyst suspension sedimentation and preventing blockage at the inlet of the pressurizing element 3.

[0038] The second cooling unit 6 includes a cooling structure and a cooling circulation assembly. The cooling structure is located on the outer wall of the storage tank 1, and the cooling circulation assembly stores the cooling medium and is used to input the cooling medium into the cooling structure. The cooling medium in the cooling circulation assembly is input into the cooling structure to achieve effective cooling of the storage tank 1. After exchanging heat with the storage tank 1, the cooling medium is transported back to the cooling circulation assembly, cooled down, and then circulated back into the cooling structure to cool the storage tank 1.

[0039] Alternatively, the cooling structure can be a cooling pipe wound around the lower side wall of the storage tank 1.

[0040] Alternatively, the cooling structure can be a cooling jacket installed on the side wall of storage tank 1.

[0041] In some embodiments, the catalyst suspension delivery system further includes a first cooling unit disposed downstream of the drive element 5 along the catalyst suspension delivery direction to cool the catalyst suspension in the second pipeline 4. The first cooling unit is capable of cooling the catalyst suspension passing through the drive element 5 to reduce the temperature of the catalyst suspension entering the storage tank 1.

[0042] Optionally, the first cooling unit can be a heat exchanger.

[0043] The second pipeline 4 is also equipped with a valve 10 to control the opening and closing of the second pipeline 4.

[0044] Optionally, valves 10 can be installed at both the end of the second pipeline 4 near the storage tank 1 and the end near the connection point to achieve precise on / off switching of the second pipeline 4.

[0045] In the event of a reactor malfunction or shutdown, or in other situations requiring the return of the catalyst suspension passing through the pressurizing element 3 to the storage tank 1, the catalyst suspension delivery system further includes a third pipeline 7. The third pipeline 7 connects the storage tank 1 and the first pipeline 2 between the pressurizing element 3 and the reactor 11, to return the catalyst suspension passing through the pressurizing element 3 to the storage tank 1. In the event of a reactor malfunction or shutdown, or in other situations requiring the return of the catalyst suspension passing through the pressurizing element 3 to the storage tank 1, the catalyst suspension is returned to the storage tank 1 via the third pipeline 7, thus preventing waste of the catalyst suspension.

[0046] Specifically, see Figure 1 One end of the third pipe 7 is connected to the first pipe 2, and the other end of the third pipe 7 is connected to the top of the storage tank 1.

[0047] In some embodiments, the catalyst suspension delivery system further includes a valve 10 disposed in the third pipeline 7. The valve 10 disposed in the third pipeline 7 can control the opening and closing of the third pipeline 7. When it is not necessary to transport the catalyst suspension through the pressurizing element 3 back to the storage tank 1, the valve 10 in the third pipeline 7 is closed to avoid the third pipeline 7 competing for the amount of catalyst suspension entering the reactor 11.

[0048] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention. This includes combining various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A catalyst suspension delivery system, characterized in that, include: Storage tank (1), the storage tank (1) is used to store catalyst suspension; The first pipeline (2) is used to connect the storage tank (1) and the reactor (11). A pressurizing element (3) is provided on the first pipeline (2) to input the catalyst suspension in the storage tank (1) into the reactor (11); The second pipeline (4) is configured to connect the storage tank (1) and the first pipeline (2). The connection position between the second pipeline (4) and the first pipeline (2) is between the pressurizing element (3) and the storage tank (1) and close to the pressurizing element (3). as well as A driving element (5) is disposed on the second pipeline (4) to drive the catalyst suspension in the first pipeline (2) to be transported back to the storage tank (1) through the second pipeline (4).

2. The catalyst suspension delivery system according to claim 1, characterized in that, The distance between the connecting position and the inlet of the pressurizing element (3) is 0-500mm.

3. The catalyst suspension delivery system according to claim 1, characterized in that, The second pipeline (4) is also equipped with a valve (10).

4. The catalyst suspension delivery system according to claim 1, characterized in that, The catalyst suspension delivery system further includes a first cooling unit, which is located downstream of the drive element (5) along the delivery direction of the catalyst suspension to cool the catalyst suspension in the second pipeline (4).

5. The catalyst suspension delivery system according to claim 1, characterized in that, The catalyst suspension delivery system further includes a second cooling unit (6), which is used to cool the catalyst suspension in the storage tank (1).

6. The catalyst suspension delivery system according to claim 5, characterized in that, The second cooling unit (6) includes: A cooling structure, wherein the cooling structure is disposed on the outer side wall of the storage tank (1); and A cooling circulation assembly that stores a cooling medium and is used to input the cooling medium into the cooling structure.

7. The catalyst suspension delivery system according to claim 1, characterized in that, The catalyst suspension delivery system further includes a third pipeline (7), which is configured to connect the storage tank (1) and the first pipeline (2) between the pressurizing element (3) and the reactor (11) to deliver the catalyst suspension through the pressurizing element (3) back to the storage tank (1).

8. The catalyst suspension delivery system according to claim 7, characterized in that, The catalyst suspension delivery system also includes a valve (10) installed in the third pipeline (7).

9. The catalyst suspension delivery system according to any one of claims 1-8, characterized in that, The catalyst suspension delivery system also includes a stirring mechanism (8), which is used to stir the catalyst suspension in the storage tank (1).

10. The catalyst suspension delivery system according to any one of claims 1-8, characterized in that, The catalyst suspension delivery system also includes an input pipeline (9) for inputting the catalyst suspension into the storage tank (1).

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