Alkyl aluminum transport system

Abstract

The application discloses an alkyl aluminum transportation system, which comprises a nitrogen tank, a mineral oil flushing pipe, a mineral oil tank, a mineral oil inlet pipe, a mineral oil outlet pipe, a mineral oil pump line, an alkyl aluminum pump inlet pipe line and a mineral oil cylinder flushing pipe.

Description

Technical Field

[0001] This application relates to the field of dangerous goods transportation technology, and in particular to an alkyl aluminum transportation system. Background Technology

[0002] Alkyl aluminum is a large class of organometallic aluminum compounds formed by the direct combination of alkyl groups and aluminum. Also known as trialkyl aluminum, it can be used as an intermediate in organic synthesis and as a catalyst in reactions.

[0003] Currently, the polyolefin unit uses nitrogen to transport alkylaluminum from cylinders to alkylaluminum storage tanks. The alkylaluminum in the storage tanks is then pumped to the reactor as a co-catalyst to activate the catalyst. When the alkylaluminum pump needs maintenance or when the alkylaluminum in the cylinders needs replacement, nitrogen is used to purge and replace the inlet and outlet pipelines of the alkylaluminum pump and the material lines of the alkylaluminum cylinders.

[0004] However, using nitrogen to purge the alkylaluminum pump and pipelines has the problem of incomplete purging, and the disassembly and reassembly of the alkylaluminum pump inlet and outlet flanges can cause fires and smoke, posing a safety hazard. Furthermore, when replacing the alkylaluminum cylinder, nitrogen must be used to purge and purge the alkylaluminum cylinder outlet material pipe for an extended period through the cylinder's nitrogen pipe. Even during the disassembly and reassembly of the cylinder's nitrogen pipe and the alkylaluminum cylinder outlet material pipe flange, fires and smoke can still occur, posing a certain safety hazard. Summary of the Invention

[0005] This application provides an alkyl aluminum transport system that solves the problem of incomplete alkyl aluminum replacement and potential safety hazards during nitrogen flushing of alkyl aluminum transport equipment in the prior art.

[0006] To address the aforementioned technical problems, this application provides an alkylaluminum transportation system, comprising a nitrogen tank, a mineral oil tank, an alkylaluminum cylinder, an alkylaluminum canister, and an alkylaluminum pump. The nitrogen tank and the alkylaluminum cylinder are connected via a cylinder nitrogen pipe. The alkylaluminum cylinder is connected to the alkylaluminum canister via a cylinder outlet material pipe. The alkylaluminum canister and the nitrogen tank are connected via an alkylaluminum canister nitrogen pipe. The outlet of the alkylaluminum canister is connected to the alkylaluminum pump via an alkylaluminum pump inlet pipe. One end of the alkylaluminum pump is connected to an alkylaluminum pump outlet pipe.

[0007] One end of the nitrogen tank is connected to a mineral oil flushing pipe via a mineral oil nitrogen pipe. The mineral oil nitrogen pipe is connected to the mineral oil tank via a mineral oil inlet pipe. The outlet of the mineral oil tank is connected to the mineral oil flushing pipe via a mineral oil outlet pipe. The mineral oil flushing pipe is connected to a mineral oil pump line and a mineral oil cylinder flushing pipe via a tee pipe. The mineral oil pump line is connected to the inlet pipe of the alkyl aluminum pump. One end of the mineral oil cylinder flushing pipe is connected to the cylinder nitrogen pipe.

[0008] In a preferred embodiment, there are three alkyl aluminum pumps, and correspondingly, the alkyl aluminum tank is connected to the three alkyl aluminum pumps respectively through three alkyl aluminum pump inlet pipelines.

[0009] As a preferred embodiment, it further includes: an alkyl aluminum pump for cross-line operation;

[0010] One end of the alkylaluminum pump crossover is connected to the inlet pipeline of the alkylaluminum pump, and the other end of the alkylaluminum pump crossover is connected to the outlet pipeline of the alkylaluminum pump. The alkylaluminum pump crossover spans the alkylaluminum pump.

[0011] In a preferred embodiment, the mineral oil outlet pipe is also connected to a mineral oil drum via a mineral oil supply pipe.

[0012] In a preferred embodiment, a vent valve is also provided at the material outlet of the alkyl aluminum can.

[0013] In a preferred embodiment, a pressure relief line is also provided on the nitrogen gas pipe of the gas cylinder.

[0014] In a preferred embodiment, it further includes: a bypass pipe;

[0015] One end of the bypass pipe is connected to the nitrogen pipe of the gas cylinder, and the other end of the bypass pipe is connected to the material outlet pipe of the gas cylinder.

[0016] The alkylaluminum transport system provided in this application, in practical use, when the alkylaluminum cylinder needs to be replaced, opens the mineral oil control valve of the cylinder. Nitrogen gas is then introduced through the mineral oil inlet pipe to transport the mineral oil in the mineral oil tank to the mineral oil flushing pipe. Nitrogen gas in the mineral oil nitrogen pipe then transports the mineral oil in the mineral oil flushing pipe to the alkylaluminum cylinder. After the mineral oil fully reacts with the alkylaluminum in the cylinder, it is discharged from the alkylaluminum cylinder. The cylinder is then purged and replaced using the nitrogen gas pipe. Similarly, when the alkylaluminum pump needs to be disassembled and repaired, the alkylaluminum pump control valve is opened, and mineral oil enters the alkylaluminum pump through the mineral oil pump line. The mineral oil flushes the alkylaluminum pump before repair and replacement.

[0017] Compared with the prior art, the beneficial effects of this application are:

[0018] 1. Before replacing alkylaluminum cylinders, flush the nitrogen gas line and the outlet material line of the cylinder with mineral oil to prevent fire and smoke during flange disassembly and assembly when replacing the alkylaluminum cylinders. Before overhauling or replacing alkylaluminum pumps, flush the inlet pipeline of the alkylaluminum pump with mineral oil to prevent fire and smoke during alkylaluminum pump inlet and outlet flange disassembly and assembly when overhauling the alkylaluminum pump.

[0019] 2. Since mineral oil can dissolve alkyl aluminum and its flushing and replacement effect is stronger than that of nitrogen, an alkyl aluminum tank can be added to the original equipment. The alkyl aluminum cylinder and alkyl aluminum pump can be flushed with mineral oil to avoid safety hazards caused by incomplete nitrogen replacement. Attached Figure Description

[0020] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0021] Figure 1 This is a schematic diagram of an alkyl aluminum transport system provided by the present invention;

[0022] In the diagram: 1. Nitrogen tank; 2. Mineral oil tank; 3. Mineral oil nitrogen line; 4. Mineral oil inlet line; 5. Mineral oil outlet line; 6. Mineral oil flushing line; 16. Mineral oil cylinder flushing line; 7. Mineral oil pump line; 8. Alkyl aluminum pump inlet line; 9. Alkyl aluminum pump; 10. Alkyl aluminum pump outlet line; 11. Cylinder nitrogen line; 12. Alkyl aluminum cylinder; 13. Cylinder outlet material line; 14. Alkyl aluminum tank; 15. Alkyl aluminum tank nitrogen line; 17. Alkyl aluminum pump bypass line; 18. Mineral oil supply line; 19. Mineral oil drum; 20. Vent valve; 21. Bypass line; 22. Cylinder mineral oil control valve; 23. Alkyl aluminum pump control valve. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0024] The core of this application is to provide an alkyl aluminum transport system that can solve the safety hazards in the process of using nitrogen to flush alkyl aluminum transport equipment in the prior art, and the problem of transport interruption caused by the process of replacing the alkyl aluminum pump.

[0025] Figure 1 This is a schematic diagram of an alkyl aluminum transport system provided in an embodiment of the present invention.

[0026] See Figure 1An alkylaluminum transport system includes a nitrogen tank 1, the size and shape of which are consistent with existing technologies. The nitrogen tank 1 is connected to an alkylaluminum cylinder 12 via a nitrogen cylinder pipe 11. The material outlet end of the alkylaluminum cylinder 12 is connected to the alkylaluminum tank 14 via a material outlet pipe 13. Nitrogen gas enters the alkylaluminum cylinder 12 through the nitrogen cylinder pipe 11 and purges the alkylaluminum in the alkylaluminum cylinder 12 into the alkylaluminum tank 14. The material outlet end of the alkyl aluminum tank 14 is connected to the alkyl aluminum pump inlet pipeline 8, and the other end of the alkyl aluminum pump inlet pipeline 8 is connected to the alkyl aluminum pump 9. The alkyl aluminum tank 14 is also connected to the nitrogen tank 1 through the alkyl aluminum tank nitrogen pipeline 15. In actual use, nitrogen is used to purge the alkyl aluminum in the alkyl aluminum tank 14 through the alkyl aluminum tank nitrogen pipeline 15. The alkyl aluminum pump 9 transports the alkyl aluminum in the alkyl aluminum tank 14 to the reactor through the alkyl aluminum pump outlet pipeline 10. The reactor is not shown in the figure. The alkyl aluminum pump 9 can be a commercially available pump, and its working principle and structure can be found in the prior art.

[0027] One end of nitrogen tank 1 is connected to a mineral oil nitrogen pipe 3. Mineral oil nitrogen pipe 3 is connected to a mineral oil inlet pipe 4 and a mineral oil flushing pipe 6 via a tee. One end of the mineral oil inlet pipe 4 is connected to mineral oil tank 2, and the outlet of mineral oil tank 2 is connected to a mineral oil outlet pipe 5. The other end of the mineral oil outlet pipe 5 is connected to the mineral oil flushing pipe 6. The mineral oil flushing pipe 6 is connected to a mineral oil pump line 7 via a tee, and the mineral oil pump line 7 is connected to the alkyl aluminum pump inlet pipe 8. The mineral oil flushing pipe 6 is also connected to a mineral oil cylinder flushing pipe 16 via a tee. One end of the mineral oil cylinder flushing pipe 16 is connected to a cylinder nitrogen pipe 11. In actual use, nitrogen from nitrogen tank 1 enters mineral oil tank 2 through mineral oil nitrogen pipe 3 and mineral oil inlet pipe 4, purging mineral oil into the mineral oil flushing pipe 6. Then, nitrogen from mineral oil nitrogen pipe 3 purges the mineral oil in the mineral oil flushing pipe 6 to the mineral oil pump line 7, using mineral oil to flush the alkyl aluminum pump 9. The nitrogen in the mineral oil nitrogen pipe 3 blows the mineral oil in the mineral oil flushing pipe 6 into the mineral oil cylinder flushing pipe 16, and then uses mineral oil to flush the alkyl aluminum cylinder 12.

[0028] In order to ensure that alkylaluminum is smoothly transported to the next stage and to avoid reduced working efficiency due to maintenance of alkylaluminum pump 9, as a preferred embodiment, the number of alkylaluminum pump 9 is set to three. Correspondingly, alkylaluminum tank 14 is connected to three alkylaluminum pump inlet pipelines 8 through three alkylaluminum pump inlet pipelines 8.

[0029] In a preferred embodiment, an alkyl aluminum pump crossover line 17 is also included; one end of the alkyl aluminum pump crossover line 17 is connected to the alkyl aluminum pump inlet pipeline 8, and the other end of the alkyl aluminum pump crossover line 17 is connected to the alkyl aluminum pump outlet pipeline 10. The alkyl aluminum pump crossover line 17 is arranged across the alkyl aluminum pump 9. When the alkyl aluminum pump 9 needs to be repaired or replaced, the alkyl aluminum can directly enter the next section through the alkyl aluminum pump crossover line, avoiding work stoppage due to alkyl aluminum interruption.

[0030] In a preferred embodiment, the mineral oil outlet pipe 5 is also connected to a mineral oil tank 19 via a mineral oil supply pipe 18. The mineral oil in the mineral oil tank 19 is transported to the mineral oil tank 2 by a pneumatic pump, thereby replenishing the mineral oil in the mineral oil tank 2 in a timely manner.

[0031] Since a large amount of alkyl aluminum needs to be placed in the alkyl aluminum tank 14, in order to prevent the gas pressure inside the alkyl aluminum tank 14 from being too high, as a preferred embodiment, a vent valve 20 is also provided at the material outlet of the alkyl aluminum tank.

[0032] In a preferred embodiment, the system further includes a bypass pipe 21; one end of the bypass pipe 21 is connected to the nitrogen pipe 11 of the gas cylinder, and the other end of the bypass pipe 21 is connected to the material outlet pipe 13 of the gas cylinder. When the alkylaluminum tank 14 needs maintenance or replacement, mineral oil can directly enter the alkylaluminum tank 14 through the bypass pipe 21.

[0033] The alkylaluminum transport system provided in this application operates as follows: When the alkylaluminum cylinder 12 needs replacement, the mineral oil control valve 22 is opened. Nitrogen gas is introduced through the mineral oil inlet pipe 4 to transport the mineral oil in the mineral oil tank 2 to the mineral oil flushing pipe 6. Nitrogen gas in the mineral oil nitrogen pipe 3 then transports the mineral oil in the mineral oil flushing pipe 6 to the alkylaluminum cylinder 12. After the mineral oil fully reacts with the alkylaluminum in the alkylaluminum cylinder 12, it is discharged from the alkylaluminum cylinder 12. The cylinder is then purged and replaced via the cylinder nitrogen pipe 11. Similarly, when the alkylaluminum pump 9 needs disassembly and maintenance, the alkylaluminum pump control valve 23 is opened. Mineral oil enters the alkylaluminum pump 9 through the mineral oil pump line 7, flushing the pump before maintenance and replacement.

[0034] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and incorporate common knowledge or customary techniques in the art disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of this application is indicated by the claims.

[0035] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this application described above do not constitute a limitation on the scope of protection of this application.

Claims

1. An alkyl aluminum transport system, characterized in that, include: The equipment includes a nitrogen tank (1), a mineral oil tank (2), an alkyl aluminum cylinder (12), an alkyl aluminum tank (14), and an alkyl aluminum pump (9). The nitrogen tank (1) and the alkyl aluminum cylinder (12) are connected by a cylinder nitrogen pipe (11). The alkyl aluminum cylinder (12) is connected to the alkyl aluminum tank (14) through a cylinder outlet material pipe (13). The alkyl aluminum tank (14) and the nitrogen tank (1) are connected by an alkyl aluminum tank nitrogen pipe (15). The outlet of the alkyl aluminum tank (14) is connected to the alkyl aluminum pump (9) through an alkyl aluminum pump inlet pipe (8). One end of the alkyl aluminum pump (9) is connected to an alkyl aluminum pump outlet pipe (10). One end of the nitrogen tank (1) is connected to a mineral oil flushing pipe (6) via a mineral oil nitrogen pipe (3). The mineral oil nitrogen pipe (3) is connected to the mineral oil tank (2) via a mineral oil inlet pipe (4). The outlet of the mineral oil tank (2) is connected to the mineral oil flushing pipe (6) via a mineral oil outlet pipe (5). The mineral oil flushing pipe (6) is connected to a mineral oil pump line (7) and a mineral oil cylinder flushing pipe (16) via a three-way pipe. The mineral oil pump line (7) is connected to the alkyl aluminum pump inlet pipe (8). One end of the mineral oil cylinder flushing pipe (16) is connected to the cylinder nitrogen pipe (11).

2. The alkyl aluminum transport system according to claim 1, characterized in that, There are three alkyl aluminum pumps (9), and correspondingly, the alkyl aluminum tank (14) is connected to the three alkyl aluminum pumps (9) through three alkyl aluminum pump inlet pipelines (8).

3. An alkyl aluminum transport system according to claim 1, characterized in that, Also includes: Alkyl aluminum pump cross-line (17); One end of the alkylaluminum pump crossover (17) is connected to the alkylaluminum pump inlet line (8), and the other end of the alkylaluminum pump crossover (17) is connected to the alkylaluminum pump outlet line (10). The alkylaluminum pump crossover (17) spans the alkylaluminum pump (9).

4. The aluminum alkyl transfer system of claim 1, wherein, The mineral oil outlet pipe (5) is also connected to a mineral oil tank (19) via a mineral oil supply pipe (18).

5. The aluminum alkyl transfer system of claim 1, wherein, An vent valve (20) is also installed at the material outlet of the alkyl aluminum can.

6. The aluminum alkyl transfer system of claim 1, wherein, The nitrogen pipe (11) of the gas cylinder is also equipped with a pressure relief line.

7. The aluminum alkyl transfer system of claim 1, wherein, Also includes: Bypass pipe (21); One end of the bypass pipe (21) is connected to the nitrogen pipe (11) of the gas cylinder, and the other end of the bypass pipe (21) is connected to the material outlet pipe (13) of the gas cylinder.

Images