Aromatic solvent purification and crystallization equipment

Abstract

The utility model discloses aromatic hydrocarbon solvent purification and crystallization equipment, which comprises a tank body, a stirring device, a heating device, a cooling device and a filtering device, the stirring device comprises a stirring motor and a stirring fan which are fixed in the middle of the top of the tank body, and the heating device comprises a heating pipe positioned at the bottom of the tank body. Through the stirring motor and the stirring fan, an aromatic solvent can be fully mixed in the tank body, the heat transfer and mass transfer processes are accelerated, so that the crystallization efficiency is improved, the production period is shortened, the heating pipe and the annular cooling pipe are matched for use, the temperature in the tank body can be accurately controlled, and the temperature requirements of different stages in the aromatic solvent crystallization process are met; the crystallization quality can be improved, meanwhile, impurities can be removed, an operator can conveniently observe the crystallization condition in the tank body at any time through the observation window, process parameters can be adjusted in time, and the product quality is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of purification equipment technology, specifically relating to an aromatic solvent purification and crystallization device. Background Technology

[0002] Aromatic solvents are a class of organic solvents whose main components are aromatic hydrocarbons, such as benzene, toluene, and xylene.

[0003] Aromatic solvents are widely used in many fields such as chemical and pharmaceutical industries. In their production and use, it is often necessary to purify and crystallize aromatic solvents to obtain high-purity products. Existing aromatic solvent purification and crystallization equipment has some shortcomings in use, such as low crystallization efficiency and difficulty in effectively removing impurities during the crystallization process, resulting in long production cycles and affecting product quality. Utility Model Content

[0004] To solve the above-mentioned technical problems, the present invention provides a technical solution: providing an aromatic solvent purification and crystallization device, including a tank, a stirring device, a heating device, a cooling device, and a filtration device;

[0005] The stirring device includes a stirring motor and a stirring fan fixed at the middle of the top of the tank. The heating device includes a heating pipe located at the bottom of the tank. The cooling device includes an annular cooling pipe wound around the side surface of the tank and a cooling water tank. A distribution box is fixedly connected to the lower surface of the tank. A conical tube is fixedly connected to the lower surface of the distribution box. The filtration device is located inside the distribution box. A controller is fixedly connected to the upper surface of the distribution box. A temperature sensor is provided on the inner side wall of the tank.

[0006] Through the above technical solution, by setting up a stirring device, a heating device, a cooling device, and a filtration device to work together, the entire process of aromatic solvent purification and crystallization is automated. This allows the aromatic solvent to be fully mixed in the tank, accelerating the heat and mass transfer process, thereby improving crystallization efficiency and shortening the production cycle. The spiral winding design of the annular cooling tube increases the cooling area and improves cooling efficiency. The setting of the diversion box facilitates solid-liquid separation operation, the conical tube can accelerate liquid flow, and the temperature sensor monitors the temperature inside the tank in real time, which, together with the controller, achieves precise temperature control.

[0007] The present invention is further configured such that a feed pipe is provided at the top of the tank, a flow control valve is provided on the feed pipe, a discharge pipe is provided at the bottom of the tank, an observation window is provided on the side surface of the tank, and a solenoid valve is provided inside the discharge pipe.

[0008] Through the above technical solutions, the flow control valve can accurately control the feeding speed, avoiding poor crystallization effect due to excessive feeding. The observation window facilitates real-time observation of the crystallization status. The solenoid valve of the discharge pipe is linked with the controller to realize automated discharge control.

[0009] The present invention is further configured such that the output end of the stirring motor is fixedly connected to a stirring shaft, the side surface of the stirring shaft is fixedly connected to a stirring fan, and the side surface of the stirring shaft is rotatably connected to the tank body.

[0010] The present invention is further configured such that the filtering device includes a filter screen, and a drawer is movably connected to the inner side wall of the diversion box, and the inner side wall of the drawer is fixedly connected to the filter screen.

[0011] The present invention is further configured such that a first motor is fixedly connected to the side surface of the diverter box, and a rotating shaft is fixedly connected to the output end of the first motor.

[0012] The present invention is further configured such that an eccentric roller is fixedly connected to the side surface of the rotating shaft, the side surface of the eccentric roller is in contact with the filter screen, and the side surface of the rotating shaft is rotatably connected to the diverter box.

[0013] Through the above technical solution, the periodic vibration generated when the eccentric roller rotates can effectively prevent the filter screen from clogging and improve the filtration efficiency. The vibration frequency and amplitude can be adjusted by the controller to adjust the speed of the first motor to meet the filtration requirements of different crystallization products.

[0014] The present invention is further configured such that the cooling device includes a water pump fixed on the cooling water tank, the output end of the water pump is connected to the annular cooling pipe, and the annular cooling pipe is spirally wound on the side surface of the tank.

[0015] Through the above technical solution, the spirally wound annular cooling pipes ensure uniform distribution of coolant and improve cooling efficiency.

[0016] The present invention is further provided with a support leg on the lower surface of the diversion box.

[0017] The beneficial effects of this utility model are as follows:

[0018] The stirring motor and stirring fan ensure thorough mixing of the aromatic solvent within the tank, accelerating heat and mass transfer processes, thereby improving crystallization efficiency and shortening the production cycle. The combined use of heating and cooling pipes allows for precise temperature control within the tank, meeting the temperature requirements at different stages of aromatic solvent crystallization, which is beneficial for improving crystallization quality and also aids in impurity removal. The observation window allows operators to monitor the crystallization process within the tank at any time, enabling timely adjustments to process parameters and ensuring product quality. Attached Figure Description

[0019] Figure 1This is a first-view structural diagram of an aromatic solvent purification and crystallization device according to this utility model;

[0020] Figure 2 This is a second-view structural diagram of an aromatic solvent purification and crystallization device according to this utility model;

[0021] Figure 3 This is a partial structural schematic diagram of an aromatic solvent purification and crystallization device according to the present invention;

[0022] Figure 4 This is a tank structure diagram of an aromatic solvent purification and crystallization device according to this utility model;

[0023] Figure 5 yes Figure 4 Sectional view at point AA.

[0024] Reference numerals: 1. Tank body; 2. Agitator motor; 3. Agitator shaft; 4. Agitator fan; 5. Temperature sensor; 6. Heating tube; 7. Discharge pipe; 8. Observation window; 9. Diverter box; 10. Drawer; 11. Filter screen; 12. First motor; 13. Rotating shaft; 14. Eccentric roller; 15. Controller; 16. Cooling water tank; 17. Water pump; 18. Circulating cooling pipe; 19. Conical pipe; 20. Support leg. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] An aromatic solvent purification and crystallization device according to this embodiment includes a tank 1, a stirring device, a heating device, a cooling device, and a filtering device. A feed pipe is provided at the top of the tank 1, and a flow control valve is provided on the feed pipe. A discharge pipe 7 is provided at the bottom of the tank 1. An observation window 8 is provided on the side surface of the tank 1, and a solenoid valve is provided inside the discharge pipe 7.

[0027] The stirring device includes a stirring motor 2 and a stirring fan 4 fixed at the top center of the tank 1. The output end of the stirring motor 2 is fixedly connected to a stirring shaft 3. The side surface of the stirring shaft 3 is fixedly connected to the stirring fan 4. The side surface of the stirring shaft 3 is rotatably connected to the tank 1. By driving the stirring fan 4 to rotate through the stirring motor 2, the aromatic solvent can be fully mixed in the tank 1, accelerating the heat and mass transfer process, thereby improving the crystallization efficiency and shortening the production cycle.

[0028] The heating device includes a heating pipe 6 located at the bottom of the tank 1. The cooling device includes an annular cooling pipe 18 wound around the side surface of the tank 1 and a cooling water tank 16. The cooling device also includes a water pump 17 fixed on the cooling water tank 16. The output end of the water pump 17 is connected to the annular cooling pipe 18. The annular cooling pipe 18 is spirally wound around the side surface of the tank 1. The lower surface of the distribution box 9 is provided with support legs 20.

[0029] A flow divider 9 is fixedly connected to the lower surface of tank 1, and a conical tube 19 is fixedly connected to the lower surface of flow divider 9. A filter device is located inside flow divider 9, and a controller 15 is fixedly connected to the upper surface of flow divider 9. A temperature sensor 5 is installed on the inner side wall of tank 1. The observation window 8 is made of transparent high-temperature resistant material, which allows operators to observe the crystallization in tank 1 at any time, adjust process parameters in a timely manner, and ensure product quality. The cooling water tank 16 has a built-in refrigeration system, which can accurately control the temperature of the coolant according to process requirements.

[0030] The heating tube 6 and the annular cooling tube 18 work together to precisely control the temperature inside the tank 1, meeting the temperature requirements at different stages of the aromatic solvent crystallization process, which is beneficial to improving the crystallization quality and also helps to remove impurities.

[0031] The filtration device includes a filter screen 11, a drawer 10 is movably connected to the inner side wall of the diversion box 9, the inner side wall of the drawer 10 is fixedly connected to the filter screen 11, a first motor 12 is fixedly connected to the side surface of the diversion box 9, a rotating shaft 13 is fixedly connected to the output end of the first motor 12, an eccentric roller 14 is fixedly connected to the side surface of the rotating shaft 13, the side surface of the eccentric roller 14 contacts the filter screen 11, and the side surface of the rotating shaft 13 is rotatably connected to the diversion box 9.

[0032] After crystallization is completed, the solenoid valve in the discharge pipe 7 is opened, and the material and mother liquor flow into the diversion box 9. The crystals remain on the filter screen 11, and the mother liquor flows through the filter screen 11 into the conical tube 19 and is discharged. During this process, the first motor 12 starts the eccentric roller 14 to knock on the filter screen 11 while rotating. The separated crystals are left in the drawer 10. The crystals can be taken out by taking out the drawer 10.

[0033] The working principle of this utility model is as follows: First, the flow control valve at the feed pipe precisely controls the feed rate of the aromatic solvent according to the production requirements, and the solvent is delivered into the tank 1. After entering the tank 1, the heating tube 6 of the heating device starts to work. The controller 15 adjusts the temperature rise of the heating tube 6 according to the set program. The temperature sensor 5 monitors the temperature in the tank 1 in real time and transmits the result to the controller 15. During this process, the stirring motor 2 drives the stirring fan 4 to rotate, so that the solvent is fully mixed in the tank 1, and the heat transfer and mass transfer process is accelerated.

[0034] Once the solvent reaches the appropriate heating temperature, the cooling device is activated, and the water pump 17 delivers cooling water to the annular cooling pipe 18. Through heat exchange, the temperature inside the tank 1 is reduced. During the temperature drop, the aromatic solvent gradually reaches a supersaturated state and begins to crystallize. The stirring device continues to work to ensure that the temperature of each part of the solvent is uniform, promotes uniform crystal growth, improves crystal quality, and also helps to separate impurities under suitable temperature conditions.

[0035] After crystallization is complete, the solenoid valve in the discharge pipe 7 is opened, and the material and mother liquor flow into the diversion box 9. The crystals remain on the filter screen 11, and the mother liquor passes through the filter screen 11. During this process, the first motor 12 starts the eccentric roller 14 to knock on the filter screen 11 while rotating. The separated crystals are left in the drawer 10. The crystals can be taken out by taking out the drawer 10.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An aromatic solvent purification and crystallization apparatus, characterized in that: It includes a tank (1), a stirring device, a heating device, a cooling device, and a filtering device; The stirring device includes a stirring motor (2) and a stirring fan (4) fixed at the middle of the top of the tank (1). The heating device includes a heating pipe (6) located at the bottom of the tank (1). The cooling device includes an annular cooling pipe (18) wrapped around the side surface of the tank (1) and a cooling water tank (16). A diversion box (9) is fixedly connected to the lower surface of the tank (1). A conical tube (19) is fixedly connected to the lower surface of the diversion box (9). The filtering device is located inside the diversion box (9). A controller (15) is fixedly connected to the upper surface of the diversion box (9). A temperature sensor (5) is provided on the inner side wall of the tank (1).

2. The aromatic solvent purification and crystallization equipment according to claim 1, characterized in that, The tank (1) is provided with a feed pipe at the top and a flow control valve on the feed pipe. The tank (1) is provided with a discharge pipe (7) at the bottom. The tank (1) is provided with an observation window (8) on the side surface. The discharge pipe (7) is provided with a solenoid valve.

3. The aromatic solvent purification and crystallization equipment according to claim 1, characterized in that, The output end of the stirring motor (2) is fixedly connected to the stirring shaft (3), the side surface of the stirring shaft (3) is fixedly connected to the stirring fan (4), and the side surface of the stirring shaft (3) is rotatably connected to the tank body (1).

4. The aromatic solvent purification and crystallization equipment according to claim 1, characterized in that, The filtering device includes a filter screen (11), and a drawer (10) is movably connected to the inner side wall of the diversion box (9). The inner side wall of the drawer (10) is fixedly connected to the filter screen (11).

5. The aromatic solvent purification and crystallization equipment according to claim 1, characterized in that, The side surface of the diverter box (9) is fixedly connected to a first motor (12), and the output end of the first motor (12) is fixedly connected to a rotating shaft (13).

6. The aromatic solvent purification and crystallization equipment according to claim 5, characterized in that, An eccentric roller (14) is fixedly connected to the side surface of the rotating shaft (13). The side surface of the eccentric roller (14) is in contact with the filter screen (11). The side surface of the rotating shaft (13) is rotatably connected to the diverter box (9).

7. The aromatic solvent purification and crystallization equipment according to claim 1, characterized in that, The cooling device also includes a water pump (17) fixed on the cooling water tank (16), the output end of the water pump (17) is connected to the annular cooling pipe (18), and the annular cooling pipe (18) is spirally wound on the side surface of the tank body (1).

8. The aromatic solvent purification and crystallization equipment according to claim 1, characterized in that, The lower surface of the diversion box (9) is provided with support legs (20).

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