Multistage membrane separation device for phosphate ester production

Abstract

The utility model relates to the field of phosphate production discloses a kind of multistage membrane separation devices of phosphate production, including reaction tank, reaction tank top is equipped with top cover, side upper portion is equipped with feeding hopper, and the output pipe of bottom is connected with membrane filtration mechanism by centrifugal pump;Reaction tank inside lower part is equipped with baffle, baffle bottom is equipped with two discharge pipes, and its upper portion is equipped with stirring assembly, and filter cartridge one is installed in reaction tank inner bottom, and side lower portion is connected with material collecting cylinder by communicating pipe, and the outside of filter cartridge one is equipped with cleaning assembly in reaction tank interior;Membrane filtration mechanism includes filter box, and filter box top is equipped with lid, and inside is equipped with pedestal, and a plurality of membrane filter element is installed in pedestal top.The utility model passes through hand wheel rotation pivot, promotes clean brush rotation to the surface cleaning of filter cartridge one, prevents its blockage;Opening solenoid valve on communicating pipe can make that the solution of high concentration impurity enters into material collecting cylinder, realizes the timely discharge of impurity, guarantees filtration rate, improves device practicability.

Description

Technical Field

[0001] This utility model relates to the field of phosphate ester production, specifically a multi-stage membrane separation device for phosphate ester production. Background Technology

[0002] Phosphate esters, also known as orthophosphate esters, are ester derivatives of phosphoric acid and belong to a class of phosphoric acid derivatives. In their production, multi-stage membrane separation devices are often used. Membrane separation is a highly efficient and environmentally friendly separation process. It is a high-tech process that integrates multiple disciplines and can exhibit a variety of characteristics and advantages in terms of physical, chemical and biological properties.

[0003] Existing multi-stage membrane separation devices for phosphate ester production utilize multiple membranes to separate phosphate esters during operation. However, in actual use, impurities may be present in the raw materials during phosphate ester preparation, resulting in low separation efficiency and extraction efficiency when relying solely on multi-stage membranes. To address this, utility model patent application number 202421458491X discloses a multi-stage membrane separation device for phosphate ester production, comprising a table and a second separation tank. The first separation tank is located on top of the table and contains a pre-separation mechanism. The second separation tank contains a multi-stage membrane separation mechanism. A feed pipe is located at the top of the first separation tank, and a discharge pipe is located on the right side of the second separation tank. The pre-separation mechanism includes a mixing component and a separation component, with the separation component located at the bottom of the mixing component. The raw materials for phosphate ester preparation are thoroughly stirred inside the table to accelerate the reaction and increase the reaction rate. After initial filtration through a filter plate, the raw materials pass through the second separation tank and then into the first and second separation membranes for further separation. Through multiple separation processes, the separation efficiency is improved.

[0004] However, in practical applications, the impurities filtered by the filter plate of this device remain in the separation component and cannot be discharged in time, which easily causes the filter plate to become clogged and affects the filtration efficiency, requiring improvement. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the above-mentioned technical defects and provide a multi-stage membrane separation device for the production of phosphate esters.

[0006] To solve the above problems, the technical solution of this utility model is: a multi-stage membrane separation device for phosphate ester production, including a reaction tank, the top of which is provided with a top cover, the upper side of which is provided with a feeding hopper, and the bottom output pipe is connected to a membrane filtration mechanism through a centrifugal pump.

[0007] The reaction vessel is equipped with a baffle at the bottom, two discharge pipes at the bottom of the baffle, and a stirring assembly above it. A filter cartridge is installed at the bottom of the reaction vessel, and a collection cylinder is connected to the lower side of the reaction vessel through a connecting pipe. A drain pipe is provided at the bottom of the collection cylinder, and a filter cartridge is installed inside the collection cylinder. A cleaning assembly is provided inside the reaction vessel on the outside of the filter cartridge.

[0008] The membrane filtration mechanism includes a filter box with a cover on top and a base inside. Multiple membrane filter elements are installed on the top of the base. Inlet pipes and outlet pipes are respectively provided at both ends of the filter box, and a liquid delivery channel is pre-installed inside.

[0009] Furthermore, the stirring assembly includes a stirring shaft rotatably mounted on the top of the partition, a ribbon-type impeller mounted on the stirring shaft, and a motor for driving the stirring shaft to rotate mounted on the top cover.

[0010] Furthermore, the output shaft of the motor is connected to a connecting cylinder sleeved on the outside of the stirring shaft. The upper side of the stirring shaft is provided with multiple outwardly protruding limiting strips, and the inner wall of the connecting cylinder is provided with limiting grooves that are adapted to the limiting strips.

[0011] Furthermore, the cleaning assembly includes a central shaft rotatably mounted at the bottom of the partition, with an inverted U-shaped fixing frame fixed to the bottom of the central shaft, and cleaning brushes symmetrically mounted on both sides inside the fixing frame.

[0012] Furthermore, a rotating shaft is installed through and rotatably at the lower front end of the reaction vessel. A handwheel is installed at one end of the rotating shaft located outside the reaction vessel, and a bevel gear is installed at the other end. A bevel gear two that meshes with the bevel gear one is installed on the outside of the central shaft.

[0013] Furthermore, the liquid delivery channels located at both ends of the base are respectively connected to the inlet pipe and the outlet pipe, and the input and output ends of the multiple membrane filter elements are connected end to end through the liquid delivery channels.

[0014] Furthermore, solenoid valves are installed on the discharge pipe, connecting pipe, and output pipe.

[0015] The advantages of this invention compared to existing technologies are as follows: This invention uses a handwheel to rotate the shaft, causing the cleaning brush to rotate and clean one surface of the filter cartridge, preventing it from becoming clogged; opening the solenoid valve on the connecting pipe allows a solution with high concentrations of impurities to enter the collection cylinder, enabling timely discharge of impurities, ensuring the filtration rate, and improving the practicality of the device. Attached Figure Description

[0016] Figure 1 This is a three-dimensional representation of the present invention. Figure 1 .

[0017] Figure 2This is a three-dimensional representation of the present invention. Figure 2 .

[0018] Figure 3 This is a cross-sectional view of the reaction vessel of this utility model. Figure 1 .

[0019] Figure 4 This is a cross-sectional view of the reaction vessel of this utility model. Figure 2 .

[0020] Figure 5 This is a cross-sectional view of the material collecting cylinder of this utility model.

[0021] Figure 6 This is a cross-sectional view of the filter box of this utility model.

[0022] As shown in the figure: 1. Reaction vessel; 2. Top cover; 3. Feed hopper; 4. Output pipe; 5. Centrifugal pump; 6. Baffle plate; 7. Discharge pipe; 8. Filter cartridge one; 9. Connecting pipe; 10. Collection cylinder; 11. Drain pipe; 12. Filter cartridge two; 13. Filter box; 14. Box cover; 15. Base; 16. Membrane filter element; 17. Stirring shaft; 18. Paddle; 19. Motor; 20. Connecting cylinder; 21. Central shaft; 22. Fixing frame; 23. Cleaning brush; 24. Rotating shaft; 25. Handwheel; 26. Bevel gear one; 27. Bevel gear two. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1 to 6 As shown, a multi-stage membrane separation device for phosphate ester production includes a reaction tank 1, a top cover 2 on the top of the reaction tank 1, a feed hopper 3 on the upper side, and an output pipe 4 at the bottom connected to a membrane filtration mechanism via a centrifugal pump 5.

[0025] The reaction vessel 1 has a baffle 6 in the lower part and a stirring assembly above the baffle 6. The stirring assembly includes a stirring shaft 17 rotatably mounted on the top of the baffle 6. A ribbon-type impeller 18 is mounted on the stirring shaft 17. A motor 19 for driving the stirring shaft 17 to rotate is mounted on the top cover 2. The output shaft of the motor 19 is connected to a connecting cylinder 20 sleeved on the outside of the stirring shaft 17. The upper side of the stirring shaft 17 has multiple outwardly protruding limiting strips. The inner wall of the connecting cylinder 20 has a limiting groove that matches the limiting strips.

[0026] Raw materials are fed into the reaction vessel 1 through the feed hopper 3. The motor 19 drives the stirring shaft 17 and the blades 18 to rotate, thereby stirring the raw materials and accelerating the reaction.

[0027] Two discharge pipes 7 are provided at the bottom of the partition 6. A filter cartridge 8 is installed at the bottom of the reaction tank 1. A collection cylinder 10 is connected to the lower side of the reaction tank 1 through a connecting pipe 9. A drain pipe 11 is provided at the bottom of the collection cylinder 10. A filter cartridge 12 is installed inside the collection cylinder 1. A cleaning component is provided inside the reaction tank 1 outside the filter cartridge 8. Solenoid valves are installed on the discharge pipes 7, the connecting pipe 9, and the output pipe 4. The cleaning component includes a central shaft 21 rotatably installed at the bottom of the partition 6. An inverted U-shaped fixing frame 22 is fixed to the bottom of the central shaft 21. Cleaning brushes 23 are symmetrically installed on both sides inside the fixing frame 22. A rotating shaft 24 is rotatably installed through the lower front end of the reaction tank 1. A handwheel 25 is installed at one end of the rotating shaft 24 located outside the reaction tank 1, and a bevel gear 26 is installed at the other end. A bevel gear 27 that meshes with the bevel gear 26 is installed on the outside of the central shaft 21.

[0028] Open the solenoid valve on the discharge pipe 7, and the solution that has completed the reaction enters the bottom of the reaction tank 1. Turn on the centrifugal pump 5, and the solution is filtered through the filter cartridge 8 and then sent to the membrane filtration mechanism for membrane filtration. Rotate the shaft 24 by handwheel 25, which causes the bevel gear 26 to drive the bevel gear 27 and the central shaft 21 to rotate. The central shaft 21 drives the cleaning brush 23 to rotate through the fixed frame 22, which can clean the surface of the filter cartridge 8 and improve the filtration efficiency.

[0029] To facilitate observation of impurities in the lower part of the reaction tank 1, a transparent observation window can be installed on the lower side of the reaction tank 1. When there are many impurities, the solenoid valves on the connecting pipe 9 and the other discharge pipe 7 can be opened to allow the solution with high concentration of impurities to enter the collection cylinder 10, thereby reducing the concentration of impurities inside the reaction tank 1 and enabling timely discharge of impurities, further ensuring the filtration rate. The solution in the collection cylinder 10 can be filtered again through the second filter cylinder 12. The filtered solution is discharged and collected through the drain pipe 11 and can be put back into the reaction tank 1 after collection.

[0030] The membrane filtration mechanism includes a filter box 13, a cover 14 on the top of the filter box 13, a base 15 inside, and multiple membrane filter elements 16 mounted on the top of the base 15. The filter box 13 has an inlet pipe and an outlet pipe that pass through both ends. The filter box 13 has a liquid delivery channel pre-installed inside. The liquid delivery channels at both ends of the base 15 are connected to the inlet pipe and the outlet pipe, respectively. The input and output ends of the multiple membrane filter elements 16 are connected end to end through the liquid delivery channel.

[0031] Centrifugal pump 5 delivers the pre-filtered solution to filter box 13, where it undergoes multi-stage filtration and separation by multiple membrane filter elements 16 before being discharged.

[0032] In practical use, this device is controlled by an external PLC controller. Raw materials are fed into the reaction tank 1 via the feed hopper 3. The motor 19 drives the paddle 18 to rotate, stirring the raw materials and accelerating the reaction rate. The reacted solution enters the bottom of the reaction tank 1 through the discharge pipe 7, then passes through the filter cartridge 8 and is pumped by the centrifugal pump 5 to the membrane filtration unit for further filtration. Rotating the shaft 24 via the handwheel 25 causes the cleaning brush 23 to rotate and clean the surface of the filter cartridge 8, preventing clogging and improving filtration efficiency. Opening the solenoid valve on the connecting pipe 9 allows a solution with high concentrations of impurities to enter the collection cylinder 10, reducing the concentration of impurities inside the reaction tank 1 and ensuring the filtration rate.

[0033] The parts not disclosed in this utility model are all prior art, such as the membrane filter element and the base, and their specific structures and working principles will not be described in detail.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0036] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A multi-stage membrane separation device for producing phosphate esters, comprising a reaction tank (1), wherein the reaction tank (1) is provided with a top cover (2) and a feed hopper (3) on the upper side, and the bottom output pipe (4) is connected to a membrane filtration mechanism via a centrifugal pump (5), characterized in that: The reaction tank (1) is provided with a partition (6) at the bottom. The partition (6) has two discharge pipes (7) at the bottom and a stirring assembly above it. The reaction tank (1) is provided with a filter cylinder (8) at the bottom and a collection cylinder (10) is connected to the lower side through a connecting pipe (9). The collection cylinder (10) is provided with a drain pipe (11) at the bottom and a filter cylinder (12) is installed inside. The reaction tank (1) is provided with a cleaning assembly outside the filter cylinder (8). The membrane filtration mechanism includes a filter box (13), the top of which is provided with a box cover (14), and a base (15) is provided inside. Multiple membrane filter elements (16) are installed on the top of the base (15), and inlet pipes and outlet pipes that pass through both ends of the filter box (13) are respectively provided at both ends. A liquid transport channel is pre-set inside.

2. The multi-stage membrane separation device for phosphate ester production according to claim 1, characterized in that: The stirring assembly includes a stirring shaft (17) rotatably mounted on the top of the partition (6), a ribbon-type impeller (18) mounted on the stirring shaft (17), and a motor (19) for driving the stirring shaft (17) to rotate on the top cover (2).

3. The multi-stage membrane separation device for phosphate ester production according to claim 2, characterized in that: The output shaft of the motor (19) is connected to a connecting cylinder (20) sleeved on the outside of the stirring shaft (17). The upper side of the stirring shaft (17) is provided with multiple outwardly protruding limiting strips, and the inner wall of the connecting cylinder (20) is provided with a limiting groove that matches the limiting strips.

4. The multi-stage membrane separation device for phosphate ester production according to claim 1, characterized in that: The cleaning assembly includes a central shaft (21) rotatably mounted on the bottom of the partition (6), and an inverted U-shaped fixing frame (22) is fixedly connected to the bottom of the central shaft (21). Cleaning brushes (23) are symmetrically installed on both sides inside the fixing frame (22).

5. A multi-stage membrane separation device for phosphate ester production according to claim 4, characterized in that: A rotating shaft (24) is installed through and rotatably at the lower front end of the reaction vessel (1). A handwheel (25) is installed at one end of the rotating shaft (24) located outside the reaction vessel (1), and a bevel gear (26) is installed at the other end. A bevel gear (27) that meshes with the bevel gear (26) is installed on the outside of the central shaft (21).

6. The multi-stage membrane separation device for phosphate ester production according to claim 1, characterized in that: The liquid delivery channels located at both ends of the base (15) are respectively connected to the inlet pipe and the outlet pipe, and the input and output ends of the multiple membrane filter elements (16) are connected end to end through the liquid delivery channels.

7. A multi-stage membrane separation device for phosphate ester production according to claim 1, characterized in that: Solenoid valves are installed on the discharge pipe (7), connecting pipe (9) and output pipe (4).

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