Recovery device of triethyl aluminum-containing waste white oil
By designing a recycling device for waste white oil containing triethylaluminum, using liquid nitrogen to control the reaction temperature, and combining a reaction tower, an ethane removal adsorption tower, and a distillation tower, the safe and efficient recycling and material recycling of waste white oil containing triethylaluminum were achieved, solving the safety and environmental pollution problems of incineration treatment.
Patent Information
- Application Number
- CN202520146588.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-22
AI Technical Summary
In existing technologies, the treatment of triethylaluminum waste white oil has problems of poor safety and environmental pollution, especially the high risk of incineration.
A device for recovering waste white oil containing triethylaluminum was designed. The reaction temperature is controlled at 0 to -4°C using liquid nitrogen, and the reaction is carried out in a nitrogen atmosphere. The white oil is safely and efficiently recovered through a combination of a reaction tower, an ethane removal adsorption tower, a filter, and a distillation tower.
It achieves the safe recycling of triethylaluminum waste white oil, with some materials being recyclable, reducing energy consumption, and avoiding the dangers and environmental pollution of combustion treatment.
Smart Images
Figure CN223747555U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to white oil recovery technical field, concretely relates to a kind of recovery device of waste white oil containing triethylaluminum. BACKGROUND
[0002] Triethylaluminum (TEAL) is used as a cocatalyst in polypropylene production, which forms active centers by complexing with the main catalyst, removes impurities, and shields non-active centers by electron donation, thereby improving the isotacticity of the product.
[0003] Triethylaluminum is a widely used activator for the fourth generation polymerization process, but it has poor stability and can burn in air and explode in water. The process is usually cleaned with white oil, which produces a large amount of waste white oil containing triethylaluminum. Most enterprises choose to burn the waste white oil on site, which is dangerous and pollutes the environment.
[0004] Therefore, there is an urgent need for a device that can safely and effectively recover white oil. INVENTION CONTENTS
[0005] The utility model aims to solve the problems in the background art mentioned above and proposes a new recovery device for waste white oil containing triethylaluminum. The recovery device for waste white oil containing triethylaluminum can safely and efficiently recover white oil.
[0006] To achieve the above-mentioned purpose, a recovery device for waste white oil containing triethylaluminum is provided. The recovery device includes a waste white oil containing triethylaluminum storage tank, a delivery pump, a reaction tower, a liquid nitrogen storage tank, a deethanization adsorption tower, a filter, and a rectifying tower. The waste white oil containing triethylaluminum storage tank is connected to the delivery pump via a pipeline. The delivery pump is connected to the reaction tower via a pipeline. The liquid nitrogen storage tank is connected to the top of the reaction tower via a pipeline. The bottom of the reaction tower is connected to the filter via a pipeline. The filter is connected to the rectifying tower via a pipeline. The deethanization adsorption tower is connected to the upper part of the reaction tower via a pipeline.
[0007] The deethanization adsorption tower is provided with an ethane recovery pipeline and a nitrogen recovery pipeline on its side wall. The rectifying tower is provided with a white oil recovery pipeline on its side wall.
[0008] In the above technical solution, the ethyl group in triethylaluminum reacts with water to produce ethane. Aluminum ions combine with hydroxyl groups in water to form aluminum hydroxide. To prevent water from reacting with triethylaluminum in waste white oil to produce a large amount of heat and explode, liquid nitrogen is introduced into the reaction tower, so that water exists in the form of ice water mixture, the initial reaction temperature is controlled at 0 to -4℃, and the reaction is carried out under nitrogen seal conditions, greatly improving safety.
[0009] Further, a pressure reducer is provided on the pipeline connecting the deethanization adsorption tower and the reaction tower.
[0010] Further, the reaction tower is provided with a pressure detection device, and the pressure detection device is electrically connected with the pressure reducer.
[0011] In the above technical solution, the reaction pressure is controlled at 0.6-0.8 MPa, when the pressure detection device detects that the pressure is greater than 0.8 MPa, the pressure reducing valve is automatically opened, the gas phase component is discharged from the top of the reaction tower into the adsorption tower, and the ethane is removed, and the nitrogen gas is fully recovered.
[0012] Further, the filter is provided with an impurity discharge pipeline at the bottom.
[0013] In the above technical solution, the impurity discharge pipeline is used for discharging the accumulated impurities such as aluminum hydroxide of the filter, so as to prevent blockage.
[0014] Further, the ethane recovery pipeline is located at the upper portion of the deethanization adsorption tower, and the nitrogen recovery pipeline is located at the lower portion of the deethanization adsorption tower.
[0015] Further, the white oil recovery pipeline is located at the upper portion of the rectifying tower.
[0016] Further, a liquid level control valve is arranged on the pipeline connecting the reaction tower and the filter.
[0017] In the above technical solution, the liquid phase material and impurities generated by the reaction tower are discharged into the rectifying tower through the filter after passing through the liquid level control valve, and the white oil and water are separated and recovered.
[0018] Further, the reaction tower is filled with an ice-water mixture.
[0019] In the above technical solution, the initial temperature in the reaction tower is controlled at 0 to -4 DEG C through the ice-water mixture, so that the reaction temperature of triethyl aluminum and water is controlled at 10-14 DEG C, and explosion is prevented.
[0020] The utility model has the advantages that:
[0021] 1. The utility model controls the temperature of water in the reaction tower through liquid nitrogen, and the reaction is carried out in a nitrogen atmosphere, so that the explosive triethyl aluminum reacts with water in a safe state, the problem of a large amount of waste and slag generated by combustion treatment is solved, and the utility model is safer.
[0022] 2. Most of the substances in the reaction of the utility model can be recycled, the white oil for cleaning the pipeline and equipment can be reused, part of the ethane generated in the reaction can be used as fuel gas, and the nitrogen gas can be recycled.
[0023] 3. A part of the energy consumption required by the reaction of the utility model is derived from the change of the form of the substance itself, the reaction temperature is controlled by using the gasification endothermic principle, and the energy consumption is greatly reduced. DRAWINGS
[0024] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. Obviously, the accompanying drawings in the following description only represent the embodiments of the present application, and other accompanying drawings can be obtained by those skilled in the art without any creative effort on the premise that the accompanying drawings are provided.
[0025] Figure 1 The structure of the present application is shown in the figure.
[0026] Illustration: 1, triethylaluminum-containing waste white oil storage tank, 2, delivery pump, 3, reaction tower, 4, liquid nitrogen storage tank, 5, de-ethane adsorption tower, 6, filter, 7, rectifying tower, 8, ethane recovery pipeline, 9, nitrogen recovery pipeline, 10, white oil recovery pipeline, 11, pressure reducer, 12, impurity discharge pipeline, 13, liquid level control valve. DETAILED DESCRIPTION
[0027] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely in the following with reference to the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments only represent a part of the embodiments of the present application, not all the embodiments. Based on the embodiments of the present application, any other embodiments obtained by those skilled in the art without any creative effort are within the protection scope of the present application.
[0028] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0029] As shown in Figure 1 A kind of triethylaluminum-containing waste white oil recovery device, the recovery device includes triethylaluminum-containing waste white oil storage tank 1, delivery pump 2, reaction tower 3, liquid nitrogen storage tank 4, de-ethane adsorption tower 5, filter 6 and rectifying tower 7, triethylaluminum-containing waste white oil storage tank is connected with the liquid inlet of delivery pump by pipeline, the liquid outlet of delivery pump is connected with the middle part of reaction tower by pipeline, liquid nitrogen storage tank is connected with the top end of reaction tower by pipeline, the bottom end of reaction tower is connected with the liquid inlet of filter by pipeline, the liquid outlet of filter is connected with rectifying tower by pipeline, de-ethane adsorption tower is connected with the upper part of reaction tower by pipeline.
[0030] The side wall of the de-ethanizing adsorption tower is provided with an ethane recovery pipeline 8 and a nitrogen recovery pipeline 9, and the side wall of the rectifying tower is provided with a white oil recovery pipeline 10.
[0031] In an embodiment, a pressure reducer 11 is arranged on the pipeline connecting the de-ethanizing adsorption tower and the reaction tower.
[0032] In an embodiment, a pressure detecting device is arranged on the reaction tower, and the pressure detecting device is electrically connected with the pressure reducer.
[0033] In an embodiment, an impurity discharge pipeline 12 is arranged at the bottom of the filter.
[0034] In an embodiment, the ethane recovery pipeline is arranged at the upper part of the de-ethanizing adsorption tower, and the nitrogen recovery pipeline is arranged at the lower part of the de-ethanizing adsorption tower.
[0035] In an embodiment, the white oil recovery pipeline is arranged at the upper part of the rectifying tower.
[0036] In an embodiment, a liquid level control valve 13 is arranged on the pipeline connecting the reaction tower and the filter.
[0037] In an embodiment, the reaction tower is filled with an ice-water mixture.
[0038] The working process of the utility model:
[0039] The triethylaluminum-containing waste white oil in the triethylaluminum-containing waste white oil storage tank is conveyed into the reaction tower by a conveying pump, the liquid nitrogen in the liquid nitrogen storage tank is conveyed into the reaction tower and mixed with the water in the tower to form an ice-water mixture, the gaseous phase components generated in the reaction are discharged from the top of the reaction tower and enter the de-ethanizing adsorption tower for separation, the ethane is discharged from the ethane recovery pipeline and recovered for use as fuel gas, the nitrogen is recovered from the nitrogen recovery pipeline for use, the liquid phase components generated in the reaction are discharged from the bottom of the reaction tower, filtered to remove impurities such as aluminum hydroxide by the filter, and then enter the rectifying tower, the water and the white oil are separated by rectification, and the white oil is discharged from the white oil recovery pipeline for recycling.
[0040] The working principle of the utility model:
[0041] The ethyl in the triethylaluminum reacts with water to generate ethane, and the aluminum ion combines with the cavity in the water to form aluminum hydroxide, and a large amount of heat is released in the reaction process of water and triethylaluminum, in the utility model, the liquid nitrogen is introduced into the water in the reaction tower to form an ice-water mixture, the initial temperature of the reaction is controlled between 0 and-4 DEG C, and the reaction is nitrogen sealed, after the reaction occurs, the temperature rises, the reaction temperature is controlled between 10-14 DEG C, and the reaction pressure is controlled between 0.6-0.8 MPa, when the pressure is higher than 0.8 MPa, the pressure reducer is opened, and the gas phase is discharged into the de-ethanizing adsorption tower.
[0042] The filtered liquid phase component is separated from water in a rectifying column with the top temperature controlled at 110-120 DEG C and the bottom temperature controlled at about 150 DEG C.
[0043] Finally, it should be noted that the embodiments are only used to illustrate the present application and do not limit the scope of the present application. In addition, it should be understood that after reading the content taught by the present application, those skilled in the art can make various changes or modifications to the present application, and these equivalent forms also fall within the scope defined by the appended claims of the present application.
Claims
1. A recovery apparatus of triethylaluminum-containing waste white oil, characterized by comprising: The recovery device comprises a triethylaluminum-containing waste white oil storage tank (1), a delivery pump (2), a reaction tower (3), a liquid nitrogen storage tank (4), a de-ethanizing adsorption tower (5), a filter (6) and a rectifying tower (7), the triethylaluminum-containing waste white oil storage tank is connected with the delivery pump through a pipeline, the delivery pump is connected with the reaction tower through a pipeline, the liquid nitrogen storage tank is connected with the top end of the reaction tower through a pipeline, the bottom end of the reaction tower is connected with the filter through a pipeline, the filter is connected with the rectifying tower through a pipeline, and the de-ethanizing adsorption tower is connected with the upper part of the reaction tower through a pipeline. The sidewall of the de-ethanizing adsorption tower is provided with an ethane recovery pipeline (8) and a nitrogen recovery pipeline (9), and the sidewall of the rectifying tower is provided with a white oil recovery pipeline (10).
2. The recycling apparatus of claim 1, wherein: A pressure reducer (11) is arranged on the pipeline connecting the de-ethanizing adsorption tower with the reaction tower.
3. The recycling apparatus of claim 2, wherein: A pressure detection device is arranged on the reaction tower, and the pressure detection device is electrically connected with the pressure reducer.
4. The recycling apparatus of claim 1, wherein: An impurity discharge pipeline (12) is arranged at the bottom of the filter.
5. The recycling apparatus of claim 1, wherein: The ethane recovery pipeline is arranged at the upper part of the de-ethanizing adsorption tower, and the nitrogen recovery pipeline is arranged at the lower part of the de-ethanizing adsorption tower.
6. The recycling apparatus of claim 1, wherein: The white oil recovery pipeline is arranged at the upper part of the rectifying tower.
7. The recycling apparatus of claim 1, wherein: A liquid level control valve (13) is arranged on the pipeline connecting the reaction tower with the filter.
8. The recycling apparatus of claim 1, wherein: The reaction tower is filled with an ice-water mixture.