Dioctyl terephthalate washing device

Abstract

The utility model discloses a dioctyl terephthalate washing device, and particularly relates to the technical field of dioctyl terephthalate production, which comprises a bottom plate, a washing tank is arranged at the top of the bottom plate, a sealing cover is arranged at the top of the washing tank, a water injection pipe is arranged at the top of the sealing cover, a feeding pipe is arranged on one side of the water injection pipe, and a discharging pipe is arranged on the other side of the water injection pipe. The bottom of the washing tank communicates with a discharging pipe, the bottom of the discharging pipe communicates with a first flow dividing pipe and a second flow dividing pipe, an auxiliary lifting structure is arranged on the side, located on the washing tank, of the top of the bottom plate and comprises a supporting frame, the supporting frame is installed on the top of the bottom plate and located on one side of the washing tank, and a lifting plate is fixedly arranged at one end of the sealing cover. According to the dioctyl terephthalate washing device, the dioctyl terephthalate can be conveniently washed, the influence of impurities in water on product washing is reduced, meanwhile, an operator can conveniently clean and maintain the whole device, and the device can be conveniently used by the operator.

Description

Technical Field

[0001] This utility model relates to the field of dioctyl terephthalate production technology, and more specifically, to a dioctyl terephthalate washing device. Background Technology

[0002] Dioctyl terephthalate is a high-performance primary plasticizer. Currently, the production of dioctyl terephthalate mainly involves six processes: esterification, de-alcoholization, water washing, stripping and drying, filtration, and wastewater treatment. Among these, water washing involves adding the initial product to a sodium carbonate solution for reaction, continuously adding water for washing, and then draining the water after precipitation.

[0003] However, existing water washing equipment is prone to generating air bubbles during water washing due to the high viscosity of the product. In addition, the water obtained by the water injection method also contains a large number of air bubbles, which affects the stability of the product separation process and thus affects the final quality of the product.

[0004] For example, Chinese patent CN216800903U discloses a dioctyl terephthalate washing device. This structure uses the balls of the first and second movable rods to stir and wash the product, avoiding the generation of air bubbles during the stirring process and achieving better stirring effect. In addition, it is equipped with a water injection pipe and a guide plate. Air bubbles in the water entering through the water injection pipe travel along the guide plate to the bottom area of ​​the washing tank, which can eliminate the impact bubbles caused by water hitting the product surface. The structure is simple. It utilizes the difference in resistivity and density between water and product, and uses a resistivity detector and a density sensor to detect and control the valve before discharge, resulting in higher accuracy in product discharge.

[0005] However, in actual use, the stirring structure is located inside the washing tank, making it difficult to thoroughly clean and maintain the stirring structure and the inside of the washing tank. In addition, it is difficult to filter impurities in the water, which can easily affect the washing effect of dioctyl terephthalate. In view of this, this utility model proposes a dioctyl terephthalate washing device. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a dioctyl terephthalate washing device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a dioctyl terephthalate washing device, comprising a base plate, a washing tank disposed on the top of the base plate, a sealing cover disposed on the top of the washing tank, a water injection pipe disposed on the top of the sealing cover, a feed pipe disposed on one side of the water injection pipe, a discharge pipe connected to the bottom of the washing tank, a first diversion pipe and a second diversion pipe connected to the bottom of the discharge pipe, a solenoid valve installed on the discharge pipe, and a first valve and a second valve respectively installed on the outside of the first diversion pipe and the second diversion pipe.

[0008] It can be seen that after adding water and dioctyl terephthalate to the washing tank and stirring, the purpose of water washing is achieved. After the water washing is completed, the first and second diversion pipes separate the water and dioctyl terephthalate, so that the water is discharged from the first diversion pipe and the dioctyl terephthalate product is discharged from the second diversion pipe.

[0009] To facilitate comprehensive cleaning and maintenance of the internal stirring structure and interior of the washing tank, preferably, an auxiliary lifting structure is provided on the top of the base plate on one side of the washing tank. This auxiliary lifting structure includes a support frame installed on the top of the base plate and located on one side of the washing tank. A lifting plate is fixedly installed at one end of the sealing cover. An electric push rod is installed on the top of the support frame, with its output end fixedly connected to the lifting plate. Two guide grooves are formed on the outer wall of the support frame, and guide blocks are slidably installed inside each groove, with the guide blocks fixedly connected to one end of the lifting plate. A sliding groove is formed on the surface of the base plate, with a lead screw installed inside the groove. A first motor is installed at one end of the lead screw, and a threaded block is installed outside the lead screw. The first motor is fixedly installed at one end of the base plate, and its output end is fixedly connected to the lead screw inside the sliding groove. The threaded block is threadedly connected to the lead screw and is fixedly installed at the bottom of the support frame.

[0010] In order to achieve thorough mixing and stirring of water and dioctyl terephthalate and improve the washing effect, preferably, a second motor is fixedly installed on the top of the sealing cap and between the water injection pipe and the feed pipe. A stirring rod is fixedly installed at the output end of the second motor. Two sleeves are fixedly installed on the outside of the stirring rod. A stirring blade is installed inside each sleeve. A stirring ball is installed at one end of the stirring blade. One end of the stirring blade is slidably connected inside the sleeve. A movable block is installed inside the sleeve at one end of the stirring blade. A spring is installed at one end of the movable block. The movable block is slidably connected inside the sleeve.

[0011] To achieve the purpose of separating and discharging water and dioctyl terephthalate, preferably, a resistivity detection box is installed on the outside of the discharge pipe, a resistivity detector is installed inside the resistivity detection box, electrodes are inserted into the discharge pipe and extend into the inside of the discharge pipe, the electrodes are electrically connected to the resistivity detector, multiple heat dissipation holes are opened on the resistivity detection box, a density sensor is installed inside the discharge pipe, and a controller is installed on the water washing tank, and the controller is electrically connected to the density sensor, the resistivity detector, the solenoid valve, the first valve and the second valve respectively.

[0012] In order to filter the added water and facilitate the cleaning of the filter screen, preferably, one end of the water injection pipe extends into the interior of the water washing tank, the outer wall of the water injection pipe is provided with an installation groove, a sealing ring is installed inside the installation groove by screws, a filter screen is installed inside the water injection pipe, the sealing ring is fixedly connected to the filter screen, and a pull groove is provided on the sealing ring.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] By setting up an auxiliary lifting structure, the electric push rod extends the lifting plate upward, causing the lifting plate to extend the sealing cover upward. This lifts the second motor at the top of the sealing cover and the stirring structure inside the washing tank to a certain height. The first motor drives the lead screw inside the slide groove to rotate, causing the threaded block to move. The threaded block drives the support frame to move away from the washing tank, and then the support frame drives the extended stirring structure to move away from the washing tank. This allows operators to easily and thoroughly clean and maintain the stirring structure and the inside of the washing tank, facilitating subsequent use.

[0015] The filter screen inside the water injection pipe can filter impurities in the water, preventing impurities from affecting the washing effect of dioctyl terephthalate. By pulling the sealing ring outward through the groove, the sealing ring can pull the filter screen out of the water injection pipe through the installation groove, allowing the filter screen to be cleaned and maintained.

[0016] The second motor on the sealed cover drives the stirring rod to rotate inside the washing tank. The stirring rod drives the stirring blades and stirring balls to rotate through the sleeve, thereby accelerating the mixing efficiency of water and dioctyl terephthalate and improving the washing effect. Moreover, during the rotation and stirring, the stirring blades and stirring balls can slide inside the sleeve due to centrifugal force, and the spring can be stretched and reset by the movable block, which can increase the stirring range of the stirring blades and stirring balls inside the washing tank and improve the stirring effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the connection structure between the lifting plate and the support frame of this utility model.

[0019] Figure 3 This is a schematic diagram of the connection structure between the filter screen and the water injection pipe of this utility model.

[0020] Figure 4 This is a schematic diagram of the structure of the stirring blade of this utility model when it extends from inside the water washing tank.

[0021] Figure 5 This is a schematic diagram of the connection structure between the stirring blade and the sleeve of this utility model.

[0022] Figure 6 This is a schematic diagram of the internal structure of the resistivity detection box of this utility model.

[0023] Figure 7 This is a diagram of the working system of this utility model.

[0024] The attached diagram is labeled as follows: 1. Base plate; 2. Washing tank; 3. Sealing cover; 4. Water injection pipe; 5. Feed pipe; 6. Discharge pipe; 7. First branch pipe; 8. Second branch pipe; 9. Support frame; 10. Lifting plate; 11. Electric push rod; 12. Slide groove; 13. Lead screw; 14. First motor; 15. Threaded block; 16. Second motor; 17. Stirring rod; 18. Sleeve; 19. Stirring blade; 20. Stirring ball; 21. Movable block; 22. Spring; 23. Solenoid valve; 24. First valve; 25. Second valve; 26. Resistivity detection box; 27. Resistivity meter; 28. Electrode; 29. ​​Density sensor; 30. Mounting groove; 31. Sealing ring; 32. Filter screen; 33. Guide block. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] As attached Figure 1-7The device shown is a dioctyl terephthalate washing device, including a base plate 1, a washing tank 2 on the top of the base plate 1, a sealing cover 3 on the top of the washing tank 2, a water injection pipe 4 on the top of the sealing cover 3, a feed pipe 5 on one side of the water injection pipe 4, a discharge pipe 6 connected to the bottom of the washing tank 2, a first diversion pipe 7 and a second diversion pipe 8 connected to the bottom of the discharge pipe 6, a solenoid valve 23 installed on the discharge pipe 6, and a first valve 24 and a second valve 25 respectively installed on the outside of the first diversion pipe 7 and the second diversion pipe 8.

[0027] Specifically, in the above structure, the feed pipe 5 is used to pour the dioctyl terephthalate product into the bottom of the inner cavity of the washing tank 2, and the water injection pipe 4 is used to add water to the inside of the washing tank 2 to wash the dioctyl terephthalate product. After the washing is completed, by opening the first valve 24 and the second valve 25 corresponding to the outside of the first diversion pipe 7 and the second diversion pipe 8, the water is discharged from the first diversion pipe 7, and the dioctyl terephthalate product is discharged from the second diversion pipe 8.

[0028] In a specific embodiment, as shown in the appendix Figure 1 , 2 As shown in Figure 4, an auxiliary lifting structure is provided on the top of the base plate 1 on one side of the washing tank 2. The auxiliary lifting structure includes a support frame 9, which is installed on the top of the base plate 1 and located on one side of the washing tank 2. A lifting plate 10 is fixedly installed at one end of the sealing cover 3. An electric push rod 11 is provided on the top of the support frame 9. The output end of the electric push rod 11 is fixedly connected to the lifting plate 10. Two guide grooves are opened on the outer wall of the support frame 9. Guide blocks 33 are slidably installed inside the two guide grooves, and the guide blocks 33 are fixedly connected to one end of the lifting plate 10. A sliding groove 12 is opened on the surface of the base plate 1. A lead screw 13 is installed inside the sliding groove 12. A first motor 14 is installed at one end of the lead screw 13. A threaded block 15 is installed outside the lead screw 13. The first motor 14 is fixedly installed at one end of the base plate 1, and the output end of the first motor 14 is fixedly connected to the lead screw 13 inside the sliding groove 12. The threaded block 15 is threadedly connected to the lead screw 13 and is fixedly installed at the bottom of the support frame 9.

[0029] Specifically, in this structure, when it is necessary to thoroughly clean and maintain the stirring structure inside the washing tank 2 and the interior of the washing tank 2, firstly, the electric push rod 11 extends the lifting plate 10 upward, so that one end of the lifting plate 10 is slidably guided by the guide block 33 and the guide groove, and the lifting plate 10 drives the sealing cover 3 to extend upward. The sealing cover 3 can lift the second motor 16 and the stirring structure at its top from the interior of the washing tank 2 to a certain height. At this time, the stirring structure extends out from the interior of the washing tank 2.

[0030] Next, the first motor 14 drives the lead screw 13 inside the slide 12 to rotate, causing the threaded block 15 to move. The threaded block 15 drives the support frame 9 to move away from the washing tank 2, and then the support frame 9 drives the extended stirring structure to move away from the washing tank 2, as shown in the attached figure. Figure 4 As shown, at this time, the operator can easily and comprehensively clean and maintain the mixing structure and the interior of the water washing tank 2, which is convenient for subsequent use.

[0031] In a specific embodiment, as shown in the appendix Figure 1 , 4 As shown in Figure 5, a second motor 16 is fixedly installed on the top of the sealing cap 3 and between the water injection pipe 4 and the feed pipe 5. A stirring rod 17 is fixedly installed at the output end of the second motor 16. Two sleeves 18 are fixedly installed on the outside of the stirring rod 17. A stirring blade 19 is installed inside each of the two sleeves 18. A stirring ball 20 is installed at one end of the stirring blade 19. One end of the stirring blade 19 is slidably connected inside the sleeve 18. A movable block 21 is installed inside the sleeve 18 at one end of the stirring blade 19. A spring 22 is installed at one end of the movable block 21. The movable block 21 is slidably connected inside the sleeve 18.

[0032] Specifically, in this structure, when water and dioctyl terephthalate are inside the washing tank 2, the second motor 16 on the sealing cover 3 drives the stirring rod 17 to rotate inside the washing tank 2. The stirring rod 17 drives the stirring blade 19 and the stirring ball 20 to rotate through the sleeve 18, thereby accelerating the mixing efficiency of water and dioctyl terephthalate and improving the washing effect.

[0033] During the rotation and stirring of the stirring blade 19 and the stirring ball 20, due to centrifugal force, the stirring blade 19 can slide inside the sleeve 18, and the spring 22 can be stretched and reset by the movable block 21, which can increase the stirring range of the stirring blade 19 and the stirring ball 20 inside the washing tank 2 and improve the stirring effect.

[0034] In a specific embodiment, as shown in the appendix Figure 1 , 4 As shown in Figures 6 and 7, a resistivity detection box 26 is installed on the outside of the discharge pipe 6, and a resistivity detector 27 is installed inside the resistivity detection box 26. An electrode 28 is inserted into the discharge pipe 6 and extends into the interior of the discharge pipe 6. The electrode 28 is electrically connected to the resistivity detector 27. Multiple heat dissipation holes are opened on the resistivity detection box 26. A density sensor 29 is installed inside the discharge pipe 6. A controller is installed on the washing tank 2, and the controller is electrically connected to the density sensor 29, the resistivity detector 27, the solenoid valve 23, the first valve 24, and the second valve 25.

[0035] Specifically, in this structure, after the dioctyl terephthalate inside the washing tank 2 is washed with water for 15-20 minutes, it undergoes a sedimentation treatment. After sedimentation for 40 minutes, because the density of water is greater than that of dioctyl terephthalate, the water is located at the bottom of the washing tank 2 and is discharged first. When the water flows through the discharge pipe 6, the density sensor 29 (model CX-411D+CX-411E) and the resistivity detector 27 (model ZST-530) detect the water based on the set values ​​of density and resistivity, and then transmit the signal to the controller. The controller controls the solenoid valve 23 and the first valve 24 to open, and the water flows out from the first diversion pipe 7. When the density sensor 29 and the resistivity detector 27 detect dioctyl terephthalate, they transmit the signal to the controller, and the controller controls the solenoid valve 23 and the second valve 25 to open, and the dioctyl terephthalate is discharged from the second diversion pipe 8, increasing the accuracy of product discharge and thus improving product production efficiency.

[0036] In a specific embodiment, as shown in the appendix Figure 1 , 3 As shown in Figure 4, one end of the water injection pipe 4 extends into the interior of the water washing tank 2. An installation groove 30 is provided on the outer wall of the water injection pipe 4. A sealing ring 31 is installed inside the installation groove 30 by screws. A filter screen 32 is installed inside the water injection pipe 4. The sealing ring 31 is fixedly connected to the filter screen 32, and a groove is provided on the sealing ring 31.

[0037] Specifically, in this structure, when water is delivered to the inside of the washing tank 2 via the water injection pipe 4, the filter screen 32 inside the water injection pipe 4 can filter impurities in the water, thus preventing impurities in the water from affecting the washing effect of dioctyl terephthalate.

[0038] The operator can loosen the screws at the sealing ring 31 and pull the sealing ring 31 outward through the pull groove, so that the sealing ring 31 can pull the filter screen 32 out of the water inlet pipe 4 through the mounting groove 30, and then clean and maintain the filter screen 32.

[0039] Working principle of this utility model:

[0040] This application provides a dioctyl terephthalate washing device. In specific use, water and dioctyl terephthalate are first added into the washing tank 2 through the water injection pipe 4 and the feed pipe 5, respectively. The filter screen 32 inside the water injection pipe 4 can filter impurities in the water to avoid impurities in the water affecting the washing effect of dioctyl terephthalate.

[0041] After water and dioctyl terephthalate are placed inside the washing tank 2, the second motor 16 on the sealing cover 3 drives the stirring rod 17 to rotate inside the washing tank 2. The stirring rod 17 drives the stirring blade 19 and the stirring ball 20 to rotate through the sleeve 18, thereby accelerating the mixing efficiency of water and dioctyl terephthalate and improving the washing effect.

[0042] After washing for 15-20 minutes, the product undergoes sedimentation. After 40 minutes of sedimentation, because the density of water is greater than that of dioctyl terephthalate, the water is located at the bottom of the washing tank 2 and is discharged first. When the water flows through the discharge pipe 6, the density sensor 29 (model CX-411D+CX-411E) and the resistivity detector 27 (model ZST-530) detect the water based on the set values ​​of density and resistivity. The signal is then transmitted to the controller, which controls the solenoid valve 23 and the first valve 24 to open, allowing the water to flow out from the first diversion pipe 7. When the density sensor 29 and the resistivity detector 27 detect dioctyl terephthalate, the signal is transmitted to the controller, which controls the solenoid valve 23 and the second valve 25 to open, allowing the dioctyl terephthalate to be discharged from the second diversion pipe 8. This increases the accuracy of product discharge and thus improves production efficiency.

[0043] When a thorough cleaning and maintenance of the stirring structure and the interior of the washing tank 2 is required, the electric push rod 11 extends the lifting plate 10 upwards, causing the lifting plate 10 to drive the sealing cover 3 upwards. This lifts the second motor 16 at the top of the sealing cover 3 and the stirring structure inside the washing tank 2 to a certain height. At this time, the stirring structure extends out from the interior of the washing tank 2. The first motor 14 drives the lead screw 13 inside the slide chute 12 to rotate, causing the threaded block 15 to move. The threaded block 15 drives the support frame 9 to move away from the washing tank 2. In turn, the support frame 9 drives the extended stirring structure to move away from the washing tank 2. Operators can easily and thoroughly clean and maintain the stirring structure and the interior of the washing tank 2, which is convenient for subsequent use.

[0044] When it is necessary to clean the filter screen 32 inside the water injection pipe 4, loosen the screw at the sealing ring 31, and pull the sealing ring 31 outward through the pull groove. This will allow the sealing ring 31 to pull the filter screen 32 out of the water injection pipe 4 through the mounting groove 30, so that the filter screen 32 can be cleaned and maintained.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dioctyl terephthalate washing device, comprising a base plate (1), characterized in that: A washing tank (2) is provided on the top of the base plate (1), a sealing cover (3) is provided on the top of the washing tank (2), a water injection pipe (4) is provided on the top of the sealing cover (3), a feed pipe (5) is provided on one side of the water injection pipe (4), a discharge pipe (6) is connected to the bottom of the washing tank (2), a first diversion pipe (7) and a second diversion pipe (8) are connected to the bottom of the discharge pipe (6), and an auxiliary lifting structure is provided on the top of the base plate (1) on one side of the washing tank (2). The auxiliary lifting structure includes a support frame (9), which is installed on the top of the base plate (1) and located on one side of the washing tank (2). A lifting plate (10) is fixedly installed at one end of the sealing cover (3), and an electric push rod (11) is installed on the top of the support frame (9). The base plate (1) has a groove (12) on its surface. A lead screw (13) is provided inside the groove (12), and a first motor (14) is provided at one end of the lead screw (13). A threaded block (15) is provided outside the lead screw (13).

2. The dioctyl terephthalate washing apparatus according to claim 1, characterized in that: A second motor (16) is fixedly installed on the top of the sealing cap (3) and between the water injection pipe (4) and the feed pipe (5). A stirring rod (17) is fixedly installed at the output end of the second motor (16). Two sleeves (18) are fixedly installed on the outside of the stirring rod (17). A stirring blade (19) is installed inside the two sleeves (18). A stirring ball (20) is installed at one end of the stirring blade (19).

3. The dioctyl terephthalate washing apparatus according to claim 2, characterized in that: One end of the stirring blade (19) is slidably connected inside the sleeve (18). A movable block (21) is provided inside the sleeve (18) at one end of the stirring blade (19). A spring (22) is provided at one end of the movable block (21). The movable block (21) is slidably connected inside the sleeve (18).

4. The dioctyl terephthalate washing apparatus according to claim 1, characterized in that: A solenoid valve (23) is installed on the discharge pipe (6), and a first valve (24) and a second valve (25) are respectively installed on the outside of the first diversion pipe (7) and the second diversion pipe (8).

5. The dioctyl terephthalate washing apparatus according to claim 1, characterized in that: A resistivity detection box (26) is installed on the outside of the discharge pipe (6), and a resistivity detector (27) is installed inside the resistivity detection box (26). An electrode (28) is inserted into the discharge pipe (6) and extends into the inside of the discharge pipe (6). The electrode (28) is electrically connected to the resistivity detector (27). A plurality of heat dissipation holes are opened on the resistivity detection box (26), and a density sensor (29) is installed inside the discharge pipe (6).

6. The dioctyl terephthalate washing apparatus according to claim 1, characterized in that: The washing tank (2) is equipped with a controller, which is electrically connected to the density sensor (29), resistivity detector (27), solenoid valve (23), first valve (24) and second valve (25).

7. The dioctyl terephthalate washing apparatus according to claim 1, characterized in that: One end of the water injection pipe (4) extends into the interior of the water washing tank (2). An installation groove (30) is provided on the outer wall of the water injection pipe (4). A sealing ring (31) is installed inside the installation groove (30) by screws. A filter screen (32) is installed inside the water injection pipe (4). The sealing ring (31) is fixedly connected to the filter screen (32), and a groove is provided on the sealing ring (31).

8. The dioctyl terephthalate washing apparatus according to claim 1, characterized in that: The output end of the electric push rod (11) is fixedly connected to the lifting plate (10). The outer wall of the support frame (9) has two guide grooves. Guide blocks (33) are slidably arranged inside the two guide grooves, and the guide blocks (33) are fixedly connected to one end of the lifting plate (10). The first motor (14) is fixedly installed at one end of the base plate (1), and the output end of the first motor (14) is fixedly connected to the lead screw (13) inside the slide groove (12). The threaded block (15) is threadedly connected to the lead screw (13), and the threaded block (15) is fixedly installed at the bottom of the support frame (9).

Images