An on-line separation device for impurities in triethyl phosphite production

Abstract

The utility model relates to the field of chemical separation technology discloses an on -line separation equipment of impurity for triethyl phosphite production, including support, the support upper surface fixedly connected with the reaction kettle, the inside of reaction kettle is provided with the filter assembly, the filter assembly includes filter plate, the filter plate sets up in the inside of reaction kettle, the reaction kettle outer wall fixedly connected with the clamp no.

Description

Technical Field

[0001] This utility model relates to the field of chemical separation technology, and in particular to an online impurity separation device for the production of triethyl phosphite. Background Technology

[0002] Triethyl phosphite, an important organophosphorus compound, has wide applications in pesticides, pharmaceuticals, flame retardants, and other fields. During its industrial synthesis, due to the complexity of the raw material reactions and the involvement of multiple chemical steps, the resulting liquid often contains incomplete reactants, byproducts, or fine solid impurities. To ensure product purity, improve subsequent purification efficiency, and protect downstream equipment, online separation equipment is typically required during production to filter impurities in the liquid phase in real time.

[0003] Existing online separation equipment used in liquid processes mostly employs fixed filtration structures. A common structure involves installing a one-piece molded filter chamber within the main pipeline, with filter plates, screens, or cartridges inside to physically intercept suspended particles or insoluble impurities in the fluid. This type of structure has certain advantages in achieving continuous filtration, and relies on fluid self-pressure or pump pressure to drive the liquid through the filter media, thereby achieving initial separation of impurities from the main material.

[0004] However, the filter plates in existing filtration devices are typically designed as fixed units, making them difficult to disassemble and clean quickly. After prolonged operation, the filter plate surface is easily clogged and scaled by byproducts or fine particles from triethyl phosphite, reducing separation efficiency. The inability to easily remove the filter plates for cleaning or replacement leads to long maintenance cycles, high labor costs, and in severe cases, even disruptions to production continuity. Therefore, the existing devices still have certain shortcomings in their structural design and require improvement. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an online impurity separation device for the production of triethyl phosphite, aiming to improve the existing fixed filter structure, which makes it difficult to easily remove the filter plate for cleaning or replacement, resulting in long equipment maintenance cycles and high labor costs.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an online impurity separation device for the production of triethyl phosphite, comprising a support frame, a reaction vessel fixedly connected to the upper surface of the support frame, and a filter assembly disposed inside the reaction vessel;

[0007] The filter assembly includes a filter plate disposed inside the reactor. A first clamp and a second clamp are fixedly connected to the outer wall of the reactor. The filter plate is disposed on the inner wall of the first and second clamps. A first sealing gasket is fixedly connected to the upper surface of the filter plate, and a second sealing gasket is fixedly connected to the lower surface of the filter plate. The first and second clamps are fixedly connected by a first fixing rod. A sleeve is fixedly connected to the inner wall of the second clamp. A fixing block is fixedly connected to the inner wall of the first clamp. A sliding block is slidably connected to the inner wall of the sleeve. A second fixing rod is fixedly connected to the inner wall of the sliding block. A limit block is fixedly connected to one end of the second fixing rod, and a spring is sleeved on the outer wall of the second fixing rod.

[0008] Furthermore, a motor is fixedly connected to the upper surface of the reactor, a rotating shaft is fixedly connected to the output end of the motor, a stirring rod is fixedly connected to the outer wall of the rotating shaft, a connecting block is fixedly connected to the outer wall of the stirring rod, a second spring is provided inside the connecting block, a pressing plate is fixedly connected to one end of the second spring, and a scraper is fixedly connected to the outer wall of the pressing plate.

[0009] Furthermore, an exhaust pipe is fixedly connected to the upper surface of the reactor, and a discharge pipe is fixedly connected to the lower surface of the reactor.

[0010] Furthermore, a feed pipe is fixedly connected to the outer wall of the support, and a reinforcing rib is fixedly connected to the outer wall of the feed pipe.

[0011] Furthermore, a buffer plate is fixedly connected to the inner wall of the reactor, and the buffer plate is fixedly connected to the upper surface of the filter plate.

[0012] Furthermore, one end of the spring is fixedly connected to the outer wall of the sliding block, and the other end of the spring is fixedly connected to the inner wall of the sleeve.

[0013] Furthermore, the limiting block is disposed on the inner wall of the fixing block, and the second fixing rod is disposed inside the sleeve.

[0014] Furthermore, one end of the second spring is fixedly connected to the inner wall of the connecting block, and the scraper is in contact with the inner wall of the reactor.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, the filter plate is clamped and fixed by clamp one and clamp two, and sealed with sealing gasket one and sealing gasket two. Combined with the quick-release fixing mechanism consisting of sleeve, fixing block, sliding block, fixing rod two, limiting block and spring one, the filter plate can be quickly disassembled and replaced, simplifying the operation process, significantly reducing disassembly and assembly time and maintenance difficulty, solving the problems of complex structure, long maintenance cycle and high labor cost of traditional filter devices, and improving the efficiency and convenience of equipment use.

[0017] 2. In this utility model, by setting a scraper structure that rotates with the shaft inside the reactor, the scraper is elastically attached to the inner wall of the reactor by two springs. During the operation of the equipment, the condensate film or deposited impurities attached to the inner wall of the reactor can be continuously or intermittently scraped off. This effectively prevents the accumulation of impurities, avoids the decrease in heat exchange efficiency or product quality problems caused by inner wall contamination, thereby improving the stability of equipment operation and the cleaning and maintenance efficiency of the reactor, extending the continuous operation time of the equipment, and meeting the process requirements in the production of triethyl phosphite. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of an online impurity separation device for the production of triethyl phosphite proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the reactor part of an online impurity separation device for the production of triethyl phosphite proposed in this utility model;

[0020] Figure 3 This is an exploded view of the filter plate structure of an online impurity separation device for the production of triethyl phosphite proposed in this utility model.

[0021] Figure 4 This is a schematic diagram of the sleeve section of an online impurity separation device for the production of triethyl phosphite proposed in this utility model;

[0022] Figure 5 This is a schematic diagram of the connecting block portion of an online impurity separation device for the production of triethyl phosphite proposed in this utility model.

[0023] Legend:

[0024] 1. Support frame; 2. Reactor; 3. Motor; 4. Vent pipe; 5. Feed pipe; 6. Clamp 1; 7. Clamp 2; 8. Reinforcing rib; 9. Discharge pipe; 10. Stirring rod; 11. Connecting block; 12. Scraper; 13. Rotating shaft; 14. Buffer plate; 15. Sealing gasket 1; 16. Filter plate; 17. Fixing rod 1; 18. Sealing gasket 2; 19. Fixing rod 2; 20. Sleeve; 21. Fixing block; 22. Limiting block; 23. Sliding block; 24. Spring 1; 25. Spring 2; 26. Extrusion plate. 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] Reference Figures 1-5 The present invention provides an embodiment of an online impurity separation device for the production of triethyl phosphite, comprising a support 1, which supports and fixes the entire device and serves as the mounting base for the reactor 2 and other components, ensuring structural stability. The reactor 2 is fixedly connected to the upper surface of the support 1, and a filter assembly is installed inside the reactor 2.

[0027] The filtration assembly includes a filter plate 16, which is a key component for impurity separation. It is used to trap impurity particles and achieve liquid-phase purification. The filter plate 16 is disposed inside the reactor 2. Clamps 1-6 and 2-7 are fixedly connected to the outer wall of the reactor 2. Clamps 2-7 cooperate with clamps 1-6 to hold the filter plate 16 and serve as a support for the filtration assembly. The filter plate 16 is disposed on the inner wall of clamps 1-6 and 2-7. A sealing gasket 15 is fixedly connected to the upper surface of the filter plate 16. The sealing gasket 15 is disposed on the upper part of the filter plate 16 and is used to seal between the filter plate 16 and clamps 1-6 to prevent liquid leakage. A sealing gasket is fixedly connected to the lower surface of the filter plate 16. 18. Clamp 16 and clamp 27 are fixedly connected by fixing rod 17. A sleeve 20 is fixedly connected to the inner wall of clamp 27. The sleeve 20 is used to accommodate sliding block 23 and fixing rod 29, providing guidance and limiting support. A fixing block 21 is fixedly connected to the inner wall of clamp 16. Sliding block 23 is slidably connected to the inner wall of sleeve 20. Fixing rod 29 is fixedly connected to the inner wall of sliding block 23. A limiting block 22 is fixedly connected to one end of fixing rod 29. A spring 24 is sleeved on the outer wall of fixing rod 29. The spring 24 is set on the outer wall of fixing rod 29 to provide axial elastic force to reset or press the limiting block 22.

[0028] Reference Figures 1-5A motor 3 is fixedly connected to the upper surface of the reactor 2. The motor 3 provides power to drive the rotating shaft 13 to rotate, thereby achieving the functions of stirring and scraping the wall. The output end of the motor 3 is fixedly connected to the rotating shaft 13. A stirring rod 10 is fixedly connected to the outer wall of the rotating shaft 13. The stirring rod 10 is connected to the rotating shaft 13 and drives the connecting block 11 and the scraper 12 to rotate, thereby performing stirring and scraping the wall. A connecting block 11 is fixedly connected to the outer wall of the stirring rod 10. A spring 25 is installed inside the connecting block 11. A pressing plate 26 is fixedly connected to one end of the spring 25. A scraper 12 is fixedly connected to the outer wall of the pressing plate 26. The scraper 12 is attached to the inner wall of the reactor 2 and rotates with the rotating shaft 13 to scrape off condensate or deposited impurities. An exhaust pipe 4 is fixedly connected to the upper surface of the reactor 2, and a gas outlet pipe 4 is fixedly connected to the lower surface of the reactor 2. The device has a discharge pipe 9 and a feed pipe 5 fixedly connected to the outer wall of the support 1. The feed pipe 5 introduces the raw material liquid into the reactor 2 and is the raw material input channel of the device. The outer wall of the feed pipe 5 is fixedly connected to a reinforcing rib 8. The inner wall of the reactor 2 is fixedly connected to a buffer plate 14. The buffer plate 14 is set inside the reactor 2 to slow down the flow rate of the feed liquid and prevent the liquid from impacting the filter plate 16 and affecting the filtration efficiency. The buffer plate 14 is fixedly connected to the upper surface of the filter plate 16. One end of the spring 24 is fixedly connected to the outer wall of the sliding block 23, and the other end of the spring 24 is fixedly connected to the inner wall of the sleeve 20. The limiting block 22 is set inside the inner wall of the fixing block 21. The fixing rod 19 is set inside the sleeve 20. One end of the spring 25 is fixedly connected to the inner wall of the connecting block 11. The scraper 12 is in contact with the inner wall of the reactor 2.

[0029] Working Principle: When using an online impurity separation device for triethyl phosphite production, the triethyl phosphite solution is first poured into the reactor 2 through the feed pipe 5. The solution is then guided by the internal buffer plate 14 to flow slowly, transporting the liquid to the filter plate 16 for filtration. The filtered liquid is then discharged through the discharge pipe 9. When the filter plate 16 needs replacement due to excessive impurities after prolonged use, it is clamped and positioned by clamps 1-6 and 2-7, and sealed with sealing gaskets 1-15 and 2-18. The clamp structure is connected by a fixing rod 17. Simultaneously, a sleeve 20 is installed inside clamp 27. When removing the first fixing rod 17, the second fixing rod 19 can be rotated so that the limiting block 22 connected to its outer wall slides from the inner wall of the fixing block 21 into the sliding block 23, thus enabling the filter plate 16 to be disassembled, cleaned, and replaced. When fixing is required, the filter plate 16 is placed between the first clamp 6 and the second clamp 7. By pushing the second fixing rod 19, the first spring 24 is squeezed, causing the limiting block 22 to enter the fixing block 21. The second fixing rod 19 is then rotated so that the limiting block 22 is fixed in the groove on the inner wall of the fixing block 21, thereby quickly fixing the filter plate 16. This solves the problems of cumbersome operation, long disassembly and assembly time, resulting in long equipment maintenance cycles and high labor costs.

[0030] In addition, the motor 3 drives the rotating shaft 13 to rotate. The rotating shaft 13 is connected to the stirring rod 10 and the scraper 12. The scraper 12 is connected to the stirring rod 10 through the connecting block 11. The connecting block 11 is equipped with a spring 25, so that the scraper 12 can adhere to the inner wall of the reactor 2. During operation, the inner wall of the reactor is continuously or intermittently scraped to remove the liquid film or deposited oil stains formed by the condensation of gas impurities. This avoids the problem of reduced heat transfer efficiency or product contamination caused by long-term accumulation of impurities, and improves the stability of the reaction system operation and the cleaning and maintenance efficiency of the reactor.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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. An online impurity separation device for the production of triethyl phosphite, comprising a support frame (1), characterized in that: The upper surface of the support (1) is fixedly connected to the reaction vessel (2), and the reaction vessel (2) is equipped with a filter assembly inside; The filter assembly includes a filter plate (16), which is disposed inside the reactor (2). A first clamp (6) and a second clamp (7) are fixedly connected to the outer wall of the reactor (2). The filter plate (16) is disposed on the inner wall of the first clamp (6) and the second clamp (7). A first sealing gasket (15) is fixedly connected to the upper surface of the filter plate (16), and a second sealing gasket (18) is fixedly connected to the lower surface of the filter plate (16). The first clamp (6) and the second clamp... (7) The clamp is fixedly connected by a fixing rod (17), and a sleeve (20) is fixedly connected to the inner wall of the clamp (7). A fixing block (21) is fixedly connected to the inner wall of the clamp (6). A sliding block (23) is slidably connected to the inner wall of the sleeve (20). A fixing rod (19) is fixedly connected to the inner wall of the sliding block (23). A limit block (22) is fixedly connected to one end of the fixing rod (19). A spring (24) is sleeved on the outer wall of the fixing rod (19).

2. The online impurity separation device for the production of triethyl phosphite according to claim 1, characterized in that: A motor (3) is fixedly connected to the upper surface of the reactor (2). A rotating shaft (13) is fixedly connected to the output end of the motor (3). A stirring rod (10) is fixedly connected to the outer wall of the rotating shaft (13). A connecting block (11) is fixedly connected to the outer wall of the stirring rod (10). A second spring (25) is provided inside the connecting block (11). A pressing plate (26) is fixedly connected to one end of the second spring (25). A scraper (12) is fixedly connected to the outer wall of the pressing plate (26).

3. The online impurity separation device for the production of triethyl phosphite according to claim 1, characterized in that: The upper surface of the reactor (2) is fixedly connected to an exhaust pipe (4), and the lower surface of the reactor (2) is fixedly connected to a discharge pipe (9).

4. The online impurity separation device for the production of triethyl phosphite according to claim 1, characterized in that: The outer wall of the bracket (1) is fixedly connected to a feed pipe (5), and the outer wall of the feed pipe (5) is fixedly connected to a reinforcing rib (8).

5. The online impurity separation device for the production of triethyl phosphite according to claim 1, characterized in that: A buffer plate (14) is fixedly connected to the inner wall of the reactor (2), and the buffer plate (14) is fixedly connected to the upper surface of the filter plate (16).

6. The online impurity separation device for the production of triethyl phosphite according to claim 1, characterized in that: One end of the spring (24) is fixedly connected to the outer wall of the sliding block (23), and the other end of the spring (24) is fixedly connected to the inner wall of the sleeve (20).

7. An online impurity separation device for the production of triethyl phosphite according to claim 1, characterized in that: The limiting block (22) is set on the inner wall of the fixing block (21), and the fixing rod (19) is set inside the sleeve (20).

8. An online impurity separation device for the production of triethyl phosphite according to claim 2, characterized in that: One end of the second spring (25) is fixedly connected to the inner wall of the connecting block (11), and the scraper (12) is in contact with the inner wall of the reactor (2).

Images