An oil-water mixed hydrolysis device for treating triethylaluminum-containing waste oil

Abstract

The utility model discloses a kind of oil-water mixed hydrolysis devices of disposal triethylaluminum-containing waste oil, including white oil tank, sealed recovery tank, oil-containing T2 storage tank and hydrolysis reactor. The oil-water mixed hydrolysis device of this kind of disposal triethylaluminum-containing waste oil is connected by setting nitrogen gas pipeline and reaction kettle, and carries out bubble stirring in reaction kettle inside, the device realizes the effective mixing and hydrolysis of triethylaluminum-containing waste oil, when using, nitrogen gas provides pressure for white oil tank, sealed recovery tank and oil-containing T2 storage tank on one hand, on the other hand, bubble stirring is carried out in oil-containing T2 storage tank and reaction kettle, so that triethylaluminum-containing waste oil and waste lubricating oil water mixture are fully contacted, promote the progress of hydrolysis reaction, simultaneously, the addition of nitrogen gas also avoids oxygen and triethylaluminum contact in reaction process, reduce the security risk of reaction, this design not only simplifies device structure, reduce cost, also improve reaction efficiency and security.

Description

Technical Field

[0001] This utility model relates to the technical field of polypropylene production, and in particular to an oil-water mixed hydrolysis device for disposing of waste oil containing triethylaluminum. Background Technology

[0002] In polypropylene production, triethylaluminum (T2) plays a crucial role as a co-catalyst in eliminating harmful impurities and reducing the main catalyst. However, due to its highly flammable and explosive properties, the storage, transportation, and use of T2 pose significant safety hazards. Especially during plant maintenance, the T2 system needs to be purged and washed with mineral oil; improper handling of the resulting T2-containing waste oil can lead to serious safety accidents and environmental pollution.

[0003] Currently, the main problems with the disposal methods for waste oil containing T2 are as follows: the cost of treatment by adding inhibitors, inactivators or alkaline solutions is high, and further treatment is still required after adding chemical substances; during the incineration process, T2 may react violently with air, posing a high safety risk; and the solution of adding vacuum components or power generation devices requires a large amount of waste oil and is not suitable for the disposal of trace amounts of waste oil.

[0004] Therefore, it is of great significance to develop a safe, economical and applicable method for the disposal of waste oil containing T2. Utility Model Content

[0005] In view of the problems of high cost, high safety risk, poor environmental performance and unsuitability for the treatment of trace amounts of waste oil in the existing technology for treating waste oil containing triethylaluminum, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide an oil-water mixed hydrolysis device for disposing of waste oil containing triethylaluminum, which aims to solve the problems of high cost, high safety risk, poor environmental performance and unsuitability for the treatment of trace amounts of waste oil in the existing technology for disposing of waste oil containing triethylaluminum.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an oil-water mixed hydrolysis device for disposing of waste oil containing triethylaluminum, comprising a white oil tank, a sealed recovery tank, an oil-containing T2 storage tank, and a hydrolysis reactor; the white oil tank and the oil-containing T2 storage tank are connected by a first pipeline, and a first valve is provided on the first pipeline; the sealed recovery tank and the oil-containing T2 storage tank are connected by a second pipeline, and a second valve is provided on the second pipeline; the oil-containing T2 storage tank and the hydrolysis reactor are connected by a third pipeline;

[0008] It also includes a nitrogen main pipe, which is connected to the white oil tank, the sealed recovery tank, the oil-containing T2 storage tank and the hydrolysis reactor via branch lines.

[0009] As a preferred embodiment of the oil-water mixed hydrolysis device for disposing of waste oil containing triethylaluminum described in this utility model, wherein: the internal heat exchange coil is provided inside the hydrolysis reactor, and the internal heat exchange coil has a circulating water inlet and a circulating water outlet.

[0010] As a preferred embodiment of the oil-water mixed hydrolysis device for disposing of waste oil containing triethylaluminum described in this utility model, wherein: a pressure control valve is provided at the top of the hydrolysis reactor, and the pressure control valve is connected to a low-pressure flare through a flare pipeline.

[0011] As a preferred embodiment of the oil-water mixed hydrolysis device for disposing of waste oil containing triethylaluminum described in this utility model, the bottom of the hydrolysis reactor is provided with a sediment discharge port.

[0012] As a preferred embodiment of the oil-water mixed hydrolysis device for disposing of waste oil containing triethylaluminum described in this utility model, the upper side wall of the hydrolysis reactor is provided with a clear liquid discharge port.

[0013] As a preferred embodiment of the oil-water mixed hydrolysis device for disposing of waste oil containing triethylaluminum according to the present invention, a pressure gauge is connected to the hydrolysis reactor.

[0014] As a preferred embodiment of the oil-water mixed hydrolysis device for disposing of waste oil containing triethylaluminum according to the present invention, a temperature gauge is connected to the hydrolysis reactor.

[0015] As a preferred embodiment of the oil-water mixed hydrolysis device for disposing of waste oil containing triethylaluminum described in this utility model, wherein: the oil-containing T2 storage tank is connected to a water injection line.

[0016] In a preferred embodiment of the oil-water mixed hydrolysis device for disposing of waste oil containing triethylaluminum as described in this utility model, the installation height of the hydrolysis reactor is higher than the installation height of the oil-containing T2 storage tank.

[0017] As a preferred embodiment of the oil-water mixed hydrolysis device for disposing of waste oil containing triethylaluminum described in this utility model, wherein: the branch pipe connecting the nitrogen main pipe to the oil-containing T2 storage tank and the hydrolysis reactor extends into the interior of the tank and is equipped with a gas distributor.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] 1. This utility model achieves effective mixing and hydrolysis of waste oil containing triethylaluminum by connecting a nitrogen pipeline to the reaction vessel and performing bubbling and stirring inside the reaction vessel. During use, nitrogen provides pressure to the white oil tank, the sealed recovery tank, and the oil-containing T2 storage tank, while simultaneously performing bubbling and stirring inside the oil-containing T2 storage tank and the reaction vessel. This ensures full contact between the waste oil containing triethylaluminum and the waste lubricating oil-water mixture, promoting the hydrolysis reaction. At the same time, the addition of nitrogen also prevents oxygen from contacting triethylaluminum during the reaction, reducing the safety risks of the reaction. This design not only simplifies the device structure and reduces costs but also improves reaction efficiency and safety.

[0020] 2. This utility model, by setting a bottom precipitate discharge port and a top clear liquid discharge port in the reaction vessel, achieves effective separation and collection of hydrolysis reaction products. During use, the aluminum hydroxide precipitate generated by the hydrolysis reaction is discharged through the bottom discharge port, while the waste oil and clear liquid are discharged through the top discharge port for centralized treatment. This design avoids cross-contamination of hydrolysis products, improves treatment efficiency and safety, and at the same time, the separate collection of waste oil and clear liquid and aluminum hydroxide precipitate also provides convenience for subsequent resource utilization, which is in line with the concept of circular economy and green environmental protection. Attached Figure Description

[0021] Figure 1 This is a flowchart of an oil-water mixed hydrolysis device for treating waste oil containing triethylaluminum according to the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. White oil tank; 2. Sealed recovery tank; 3. Oil-containing T2 storage tank; 4. Hydrolysis reactor; 5. Low-pressure flare; 6. Clear liquid discharge port; 7. Sediment discharge port; 8. Pressure gauge; 9. Thermometer; 10. Water injection line; 11. Internal heat exchange coil. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Example 1

[0026] Reference Figure 1This first embodiment of the present invention provides an oil-water mixed hydrolysis device for disposing of waste oil containing triethylaluminum. This device includes a white oil tank 1, a sealed recovery tank 2, an oil-containing T2 storage tank 3, and a hydrolysis reactor 4. The white oil tank 1 and the oil-containing T2 storage tank 3 are connected by a first pipeline, on which a first valve is installed. The sealed recovery tank 2 and the oil-containing T2 storage tank 3 are connected by a second pipeline, on which a second valve is installed. The oil-containing T2 storage tank 3 and the hydrolysis reactor 4 are connected by a third pipeline. The installation height of the hydrolysis reactor 4 is higher than that of the oil-containing T2 storage tank 3.

[0027] During operation, the white oil in white oil tank 1 and the triethylaluminum-containing waste oil in sealed recovery tank 2 are first pressurized through valves to oil-containing T2 storage tank 3. At the same time, nitrogen is injected into the storage tank through the nitrogen pipeline to provide pressure and bubble mix, so that the waste oil and white oil are evenly diluted. Then, the mixed waste oil is pressurized to the hydrolysis reactor 4. At this time, the reactor has been pre-filled with a mixture of waste lubricating oil and water, and the liquid level is higher than that in oil-containing T2 storage tank 3 to ensure that the waste oil can be completely immersed in the mixture. Nitrogen continues to stir through the bubbling device at the bottom of the reactor to promote the full hydrolysis reaction of triethylaluminum and water, generating aluminum hydroxide precipitate and ethane gas. During the reaction, the water volume is adjusted through water injection line 10 to ensure complete reaction and stable temperature. Finally, the aluminum hydroxide precipitate is discharged through the bottom discharge port, the waste oil clear liquid is collected from the top discharge port, and the ethane gas is discharged to the subsequent treatment system through the top pressure control valve.

[0028] Example 2

[0029] Reference Figure 1 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that it also includes a nitrogen main pipe. The nitrogen main pipe is connected to the white oil tank 1, the sealed recovery tank 2, the oil-containing T2 storage tank 3 and the hydrolysis reactor 4 through branch pipes. The branch pipes connected to the oil-containing T2 storage tank 3 and the hydrolysis reactor 4 extend into their interiors and are equipped with gas distributors.

[0030] The hydrolysis reactor 4 is equipped with an internal heat exchange coil 11, which has a circulating water inlet and a circulating water outlet.

[0031] The top of the hydrolysis reactor 4 is equipped with a pressure control valve, which is connected to the low-pressure flare 5 through a flare pipeline.

[0032] The bottom of the hydrolysis reactor 4 is equipped with a sediment discharge port 7.

[0033] The upper side wall of the hydrolysis reactor 4 is provided with a clear liquid discharge port 6.

[0034] Pressure gauge 8 is connected to the hydrolysis reactor 4.

[0035] A thermometer 9 is connected to the hydrolysis reactor 4.

[0036] The oil-containing T2 storage tank 3 is connected to a water injection line 10.

[0037] During operation, when waste oil containing triethylaluminum enters the hydrolysis reactor 4, the internal heat exchange coil 11 promptly removes the heat of reaction through circulating water to prevent overheating and vaporization of the waste oil. Pressure gauge 8 and temperature gauge 9 monitor the parameters inside the reactor in real time to ensure that the reaction proceeds within a safe range. The generated ethane gas is controlled by the top pressure control valve and then discharged into the low-pressure flare 5 for incineration via the flare pipeline to completely eliminate safety hazards. Aluminum hydroxide precipitate is collected centrally through the bottom discharge port, and the waste oil liquid is discharged from the top discharge port. The nitrogen system continuously provides pressure to each tank and stirs the mixture to ensure a uniform and efficient reaction. The water injection line 10 flexibly replenishes water according to the reaction progress until the triethylaluminum is completely hydrolyzed. The entire process is automated, further improving safety and processing efficiency.

[0038] The remaining structure is the same as that in Example 1.

[0039] Based on embodiments 1-2, the working principle of this utility model is as follows: First, pressure is supplied to the white oil tank 1 and the sealed recovery tank 2 through a nitrogen pipeline, pressurizing the white oil and waste oil containing triethylaluminum to the oil-containing T2 storage tank 3. Simultaneously, nitrogen is bubbled and mixed in the storage tank to uniformly dilute the waste oil and white oil. Subsequently, the mixed waste oil is pressurized to the hydrolysis reactor 4. At this time, a mixture of waste lubricating oil and water has been pre-injected into the reactor, and the liquid level is higher than that in the oil-containing T2 storage tank 3, ensuring that the waste oil is completely immersed in the mixture. Nitrogen continues to stir through the bubbling device at the bottom of the reactor, promoting the full hydrolysis reaction of triethylaluminum and water to generate hydrogen and oxygen. During the reaction of aluminum hydroxide precipitate and ethane gas, the internal heating coil 11 removes the heat of reaction in a timely manner through circulating water to prevent overheating and vaporization of waste oil. Pressure gauge 8 and temperature gauge 9 monitor the parameters inside the reactor in real time to ensure that the reaction proceeds within a safe range. When the reaction is complete, the aluminum hydroxide precipitate is discharged through the bottom discharge port, the waste oil is collected from the top discharge port, and the ethane gas is discharged into the low-pressure flare 5 for incineration after the pressure is controlled by the top pressure control valve. The water injection line 10 flexibly replenishes water according to the reaction progress until triethylaluminum is completely hydrolyzed. The entire process is automated to ensure safe and efficient disposal of waste oil containing triethylaluminum.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An oil-water mixed hydrolysis device for treating waste oil containing triethylaluminum, characterized in that: The system includes a white oil tank (1), a sealed recovery tank (2), an oil-containing T2 storage tank (3), and a hydrolysis reactor (4); the white oil tank (1) and the oil-containing T2 storage tank (3) are connected by a first pipeline, and a first valve is provided on the first pipeline; the sealed recovery tank (2) and the oil-containing T2 storage tank (3) are connected by a second pipeline, and a second valve is provided on the second pipeline; the oil-containing T2 storage tank (3) and the hydrolysis reactor (4) are connected by a third pipeline. It also includes a nitrogen main pipe, which is connected to the white oil tank (1), the sealed recovery tank (2), the oil-containing T2 storage tank (3) and the hydrolysis reactor (4) through branch lines.

2. The oil-water mixed hydrolysis device for disposing of waste oil containing triethylaluminum according to claim 1, characterized in that: The hydrolysis reactor (4) is equipped with an internal heat exchange coil (11), which has a circulating water inlet and a circulating water outlet.

3. The oil-water mixed hydrolysis device for treating waste oil containing triethylaluminum according to claim 1, characterized in that: The top of the hydrolysis reactor (4) is equipped with a pressure control valve, which is connected to a low-pressure torch (5) through a torch pipeline.

4. The oil-water mixed hydrolysis device for disposing of waste oil containing triethylaluminum according to claim 1, characterized in that: The bottom of the hydrolysis reactor (4) is provided with a sediment discharge port (7).

5. The oil-water mixed hydrolysis device for treating waste oil containing triethylaluminum according to claim 1, characterized in that: The upper side wall of the hydrolysis reactor (4) is provided with a clear liquid discharge port (6).

6. The oil-water mixed hydrolysis device for disposing of waste oil containing triethylaluminum according to claim 1, characterized in that: A pressure gauge (8) is connected to the hydrolysis reactor (4).

7. The oil-water mixed hydrolysis device for disposing of waste oil containing triethylaluminum according to claim 1, characterized in that: A thermometer (9) is connected to the hydrolysis reactor (4).

8. The oil-water hydrolysis apparatus for treating waste oil containing triethylaluminum according to claim 1, characterized in that: The oil-containing T2 storage tank (3) is connected to a water injection line (10).

9. The oil-water mixed hydrolysis device for disposing of waste oil containing triethylaluminum according to claim 1, characterized in that: The installation height of the hydrolysis reactor (4) is higher than that of the oil-containing T2 storage tank (3).

10. The oil-water mixed hydrolysis device for disposing of waste oil containing triethylaluminum according to claim 1, characterized in that: The branch pipe connecting the nitrogen main pipe to the oil-containing T2 storage tank (3) and the hydrolysis reactor (4) extends into the interior and is equipped with a gas distributor.

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