Long-chain alkylbenzene refined decolorization and impurity removal device

Abstract

The invention discloses a long-chain alkylbenzene refined decolorization and impurity removal device which comprises a storage tank, a stirring tank, a filter and a finished product tank, the storage tank is connected with an external long-chain alkylbenzene production line, the external long-chain alkylbenzene production line pumps produced long-chain alkylbenzene to the storage tank, the storage tank is connected with the stirring tank through a pipeline, and the stirring tank is connected with the filter through a pipeline. The filter is connected with the stirring tank, a feeding port is formed in the upper part of the stirring tank, a discharging port is formed in the side surface of the stirring tank, the filter is connected with the discharging port, and the other end of the filter is connected with the finished product tank. The stirring tank is combined with the external low-pressure steam heat tracing device and the temperature and pressure control system for use, so that accurate stirring and decolorizing treatment can be carried out under the conditions of constant temperature and pressure, impurities and colors in long-chain alkylbenzene can be efficiently removed, and the purity and the quality of a product are remarkably improved.

Description

Technical Field

[0001] The invention belongs to the field of chemical equipment, and in particular relates to a long-chain alkylbenzene refined decolorization and impurity removal device. Background Art

[0002] Long-chain alkylbenzene is an important raw material widely used in detergents, lubricants and other products. In the production process of long-chain alkylbenzene, certain impurities and colors are often entrained, which will affect its application performance and market value. The traditional long-chain alkylbenzene refining process usually relies on multiple filtration and decolorization treatments, which is inefficient and has problems such as high equipment maintenance costs and complex operations. The prior art is in urgent need of an efficient and highly automated device to solve the problem of impurity and color removal in the production process of long-chain alkylbenzene. Summary of the invention

[0003] In order to solve the above problems, the present invention discloses a long-chain alkylbenzene refined decolorization and impurity removal device, which can effectively remove impurities and colors in long-chain alkylbenzene and improve product purity and quality.

[0004] To achieve the above object, the technical solution of the present invention is as follows: A long-chain alkylbenzene refined decolorization and impurity removal device comprises a storage tank, a stirring tank, a filter, and a finished product tank. The storage tank is connected to an external long-chain alkylbenzene production line, and the external long-chain alkylbenzene production line pumps the produced long-chain alkylbenzene to the storage tank. The storage tank is connected to the stirring tank through a pipeline. A feeding port is provided on the upper part of the stirring tank, a discharging port is provided on the side of the stirring tank, the filter is connected to the discharging port, and the other end of the filter is connected to the finished product tank.

[0005] As an improvement of the present invention, the filter includes three filters connected in series, namely, a first filter, a second filter, and a third filter. The first filter, the second filter, and the third filter are connected in parallel in pairs and serve as spares for each other. Each filter is provided with a pressure difference display and an alarm. If the pressure difference is greater than 0.1 MPa, it indicates that the filter is clogged to a large extent and needs to be switched to a spare filter in time. At the same time, the clogged filter needs to be processed, and the filter screen needs to be cleaned or replaced.

[0006] As an improvement of the present invention, the filter mesh size of the first filter is 100, the filter mesh size of the second filter is 200, and the filter mesh size of the third filter is 300.

[0007] As an improvement of the present invention, a first liquid pump is provided between the stirring tank and the filter.

[0008] As an improvement of the present invention, the stirring tank is provided with an external low-pressure steam heating device and a control system. A temperature sensor and a pressure sensor are provided in the stirring tank. The temperature sensor and the pressure sensor respectively detect the temperature and pressure in the stirring tank and send signals to the control system. The control system is connected to the external low-pressure steam heating device to control the temperature and pressure of the material in the stirring tank to be constant.

[0009] As an improvement of the present invention, a grid is provided at the lower part of the stirring tank, and the bottom of the stirring tank is connected to a residual oil recovery tank through a pipeline.

[0010] As an improvement of the present invention, the bottom of the filter is connected to the residual oil recovery tank through a pipeline.

[0011] As an improvement of the present invention, a discharge port is provided at the bottom of the finished product tank, the discharge port is connected to a second liquid pump, and the side of the finished product tank is connected to the storage tank through a pipeline.

[0012] The beneficial effects of the present invention are: The long-chain alkylbenzene refined decolorization and impurity removal device of the present invention adopts the design of multi-stage series filters, further removes tiny impurities in the material by filtering step by step, and the filtering accuracy of the three filters is gradually increased from 100 mesh, 200 mesh to 300 mesh, ensuring the high purity of the final product. At the same time, by combining the stirring tank with an external low-pressure steam heating device and a temperature and pressure control system, accurate stirring and decolorization can be performed under constant temperature and pressure conditions, ensuring that impurities and colors in the long-chain alkylbenzene can be efficiently removed, thereby significantly improving the purity and quality of the product.

[0013] The device is also specially designed with a residual oil recovery system. The residue and residual liquid at the bottom of the mixing tank and the filter can be automatically recovered to the residual oil recovery tank through pipelines. In addition, each filter of the present application is further provided with a pressure difference alarm device. When a filter is clogged, the system can automatically switch to a spare filter, avoiding production interruption and material waste, and improving the continuity and reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention.

[0015] Figure 2 It is the refining flow chart of the present invention.

[0016] List of Figure Symbols: 1. Storage tank; 2. Mixing tank; 31. First filter; 32. Second filter; 33. Third filter; 4. Finished product tank; 5. Pressure difference display; 6. First liquid pump; 7. External low-pressure steam heating device; 8. Grille; 9. Residual oil recovery tank; 10. Second liquid pump. DETAILED DESCRIPTION

[0017] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0018] As shown in the figure, a long-chain alkylbenzene refined decolorization and impurity removal device includes a storage tank 1, a stirring tank 2, a filter, and a finished product tank 4. The storage tank 1 is connected to an external long-chain alkylbenzene production line, and the external long-chain alkylbenzene production line pumps the produced long-chain alkylbenzene to the storage tank 1. The storage tank 1 is connected to the stirring tank 2 through a pipeline. A feeding port is provided on the upper part of the stirring tank 2, and a discharge port is provided on the side of the stirring tank 2. The filter is connected to the discharge port, and the other end of the filter is connected to the finished product tank 4.

[0019] The filter of the present invention comprises three filters connected in series, namely, a first filter 31, a second filter 32, and a third filter 33. The first filter 31, the second filter 32, and the third filter 33 are connected in parallel in pairs and serve as backup for each other. Each filter is provided with a pressure difference display 5 and an alarm. If the pressure difference is greater than 0.1 MPa, it means that the filter is clogged greatly and needs to be switched to a backup filter in time. At the same time, the clogged filter needs to be processed, and the filter screen needs to be cleaned or replaced.

[0020] The first filter 31 of the present invention has a filter mesh size of 100, the second filter 32 has a filter mesh size of 200, and the third filter 33 has a filter mesh size of 300.

[0021] A first liquid pump 6 is provided between the stirring tank 2 and the filter of the present invention.

[0022] The stirring tank 2 described in the present invention is provided with an external low-pressure steam heating device 7 and a control system. A temperature sensor and a pressure sensor are provided in the stirring tank 2. The temperature sensor and the pressure sensor respectively detect the temperature and pressure in the stirring tank 2 and send signals to the control system. The control system is connected to the external low-pressure steam heating device 7 to control the temperature and pressure of the material in the stirring tank 2 to be constant.

[0023] A grid 8 is provided at the lower part of the stirring tank 2 of the present invention, and a residual oil recovery tank 9 is connected to the bottom of the stirring tank 2 through a pipeline.

[0024] The bottom of the filter of the present invention is connected to the residual oil recovery tank 9 through a pipeline.

[0025] The bottom of the finished product tank 4 described in the present invention is provided with a discharge port, the discharge port is connected to a second liquid pump 10, and the side of the finished product tank 4 is connected to the storage tank 1 through a pipeline.

[0026] The long-chain alkylbenzene refined decolorization and impurity removal device provided by the present invention realizes the efficient refining of long-chain alkylbenzene. The working principle and specific process of the device are as follows: (1) Material storage and preliminary processing: The long-chain alkylbenzene from the long-chain alkylbenzene production line is first transported to the storage tank 1 of the device through a pipeline. The function of the storage tank 1 is to temporarily store the long-chain alkylbenzene transported from the production line to ensure the stable and continuous supply of materials in the subsequent processing process. The long-chain alkylbenzene in the storage tank 1 enters the mixing tank 2 through the connecting pipe to prepare for decolorization and impurity removal.

[0027] (2) Stirring and decolorizing and impurity removal: The stirring tank 2 is the core processing unit of the device. After the long-chain alkylbenzene enters the stirring tank 2, the feeding port on the upper part of the stirring tank 2 is used to add decolorizing agents, such as white clay, in batches. The agitator in the stirring tank 2 is started to fully mix the long-chain alkylbenzene and the decolorizing agent. In order to ensure the efficiency and uniformity of the decolorization process, the stirring tank 2 is equipped with an external low-pressure steam heating device 7, which is adjusted by the control system to maintain the temperature in the stirring tank 2 between 50°C and 80°C. At the same time, the temperature sensor and pressure sensor in the stirring tank 2 monitor the internal temperature and pressure in real time, and feed back the detected signals to the control system. The control system adjusts the operation of the heating device according to the feedback signal to ensure that the stirring conditions are constant and stable. Under suitable temperature and pressure conditions, the mixture of long-chain alkylbenzene and decolorizing agent is allowed to stand, so that the decolorizing agent and impurities fully react and precipitate.

[0028] (3) Filtration and refining: After stirring and standing, the discharge port on the side of the stirring tank 2 is opened, and the material is transported to the filtration system through the first liquid pump 6. The filtration system consists of three filters connected in series, namely the first filter 31, the second filter 32 and the third filter 33, and the number of filter meshes in each filter is 100, 200 and 300 respectively. The three filters are set in a parallel structure to ensure that when a filter is blocked, it can be switched to the spare filter in time to ensure the continuity and stability of production. The pressure difference sensor inside the filter can monitor the blockage of the filter in real time. When the pressure difference is greater than 0.1MPa, the system will automatically alarm, prompting the operator to switch to the spare filter and clean the blocked filter or replace the filter. After multi-stage filtration, the fine impurities in the long-chain alkylbenzene are removed step by step, and the filtered material is transported to the finished product tank 4.

[0029] (4) Finished product storage and material recovery: The filtered long-chain alkylbenzene enters the finished product tank 4 for storage. A discharge port is provided at the bottom of the finished product tank 4. The finished long-chain alkylbenzene can be transported to the next process or external storage equipment through the connected second liquid pump 10. The bottoms of the mixing tank 2 and the filter are connected to the residual oil recovery tank 9 through pipelines to collect the residues and residual oil precipitated during the mixing and filtering processes. These residual liquids are centrally stored in the recovery tank to reduce waste and prevent equipment pollution.

[0030] (5) Circulation and reprocessing: The side of the finished product tank 4 is connected to the storage tank 1 through a pipeline. If the quality of the finished product is slightly lower than the standard, it can be returned to the storage tank 1 through the pipeline for further processing, thereby improving the working efficiency and material utilization of the entire system.

[0031] Through the above working process, the long-chain alkylbenzene refined decolorization and impurity removal device of the present invention can efficiently and stably purify long-chain alkylbenzene, ensure the output of high-purity long-chain alkylbenzene products, and reduce resource waste, thereby meeting the high efficiency and environmental protection requirements of modern chemical production.

[0032] It should be noted that the drawings only illustrate the technical ideas of the present invention, and the protection scope of the present invention cannot be limited by this shape. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications all fall within the protection scope of the claims of the present invention.

Claims

1. A long-chain alkylbenzene refined decolorization and impurity removal device, comprising a storage tank, a stirring tank, a filter, and a finished product tank, characterized in that: The storage tank is connected to an external long-chain alkylbenzene production line, which pumps the produced long-chain alkylbenzene to the storage tank. The storage tank is connected to a stirring tank through a pipeline. A feeding port is provided on the top of the stirring tank, a discharge port is provided on the side of the stirring tank, the filter is connected to the discharge port, and the other end of the filter is connected to a finished product tank.

2. A long-chain alkylbenzene refined decolorization and impurity removal device according to claim 1, characterized in that: The filter comprises three filters connected in series, namely a first filter, a second filter and a third filter. The first filter, the second filter and the third filter are connected in parallel in pairs.

3. A long-chain alkylbenzene refined decolorization and impurity removal device according to claim 2, characterized in that: The filter mesh size of the first filter is 100, the filter mesh size of the second filter is 200, and the filter mesh size of the third filter is 300.

4. A long-chain alkylbenzene refined decolorization and impurity removal device according to claim 1, characterized in that: A first liquid pump is provided between the stirring tank and the filter.

5. A long-chain alkylbenzene refined decolorization and impurity removal device according to any one of claims 1 to 4, characterized in that: The stirring tank is provided with an external low-pressure steam heating device and a control system. A temperature sensor and a pressure sensor are provided in the stirring tank. The temperature sensor and the pressure sensor respectively detect the temperature and pressure in the stirring tank and send signals to the control system. The control system is connected to the external low-pressure steam heating device to control the temperature and pressure of the material in the stirring tank to be constant.

6. A long-chain alkylbenzene refined decolorization and impurity removal device according to claim 5, characterized in that: A grid is arranged at the lower part of the stirring tank, and the bottom of the stirring tank is connected to a residual oil recovery tank through a pipeline.

7. A long-chain alkylbenzene refined decolorization and impurity removal device according to claim 6, characterized in that: The bottom of the filter is connected to the residual oil recovery tank through a pipeline.

8. The long-chain alkylbenzene refined decolorization and impurity removal device according to claim 1, characterized in that: A discharge port is provided at the bottom of the finished product tank, and the discharge port is connected to a second liquid pump. The side of the finished product tank is connected to the storage tank through a pipeline.

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