A filter drying device for pyroxasulfone potassium salt

Abstract

The utility model belongs to filter drying device technical field especially is a kind of benzofurancarbazone potassium filter drying device, including the shell with the feed pipe in top, the filter frame that is installed below feed pipe and its bottom is connected with drain pipe and the pressure sensor that is installed on feed pipe and drain pipe, the filter frame is equipped with multiple groups, the side of feed pipe close filter frame is connected with multiple pass valve, controller is also installed on the shell, the signal output end of pressure sensor on feed pipe and drain pipe all is connected with the signal input end of controller, when pressure sensor monitors the pressure difference at feed pipe and drain pipe is greater than preset threshold value, controller switches the passageway of fluid flow by controlling the position of multiple pass valve core, realizes the automatic switching of filter frame in fluid filtration process, when one filter frame is blocked, controller can automatically switch fluid to other filter frame, avoid the stagnation of entire filtration process due to single filter frame blockage, improve filtration efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of filtration and drying devices, specifically relating to a benzoxazine potassium salt filtration and drying device. Background Technology

[0002] Solid-liquid separation and drying are crucial steps in the production of benzoxazine potassium salt to ensure product quality, stability, safety, and economy. Current filtration and drying equipment has some shortcomings in practical use and requires further improvement to meet production needs.

[0003] Traditional filtration equipment often uses a single filter frame structure. In actual production, as filtration proceeds, solid particles gradually accumulate on the filter medium, leading to increased filtration resistance. When the resistance reaches a certain level, the filtration efficiency will decrease significantly, and even blockage may occur. In the filtration process of benzoxazine potassium salt solution, the filter medium is easily blocked by impurities. Once blocked, the entire filtration process must be stopped, and the filter frame must be cleaned or replaced before production can continue. Then, the filtration process must be restarted. This results in an intermittent filtration process, which seriously affects production efficiency. Utility Model Content

[0004] To address the above problems, the purpose of this utility model is to provide a benzoxazine potassium salt filtration and drying device to solve the problems mentioned in the background art.

[0005] This utility model provides a benzoxazine potassium salt filtration and drying device, including a housing with a feed pipe at the top, a filter frame installed below the feed pipe and connected to a drain pipe at its bottom, and pressure sensors installed on the feed pipe and the drain pipe. The filter frames are configured in multiple groups. A multi-way valve is connected to the side of the feed pipe near the filter frame. A controller is also installed on the housing. The signal output terminals of the pressure sensors on the feed pipe and the drain pipe are connected to the signal input terminals of the controller to provide the controller with pressure signals of the fluid in the feed pipe and the drain pipe. When the pressure sensor detects that the pressure difference between the feed pipe and the drain pipe is greater than a preset threshold, the controller switches the fluid flow channel by controlling the position of the valve core of the multi-way valve, thereby realizing the automatic switching of the filter frames during the fluid filtration process.

[0006] Preferably, the filter frame includes a frame body with its bottom connected to the drain pipe and its top open, and a filter medium installed inside the frame body for solid-liquid separation of the benzoxazine potassium salt solution.

[0007] Preferably, each of the feed pipes is fixedly installed with a support frame at one end near the filter frame. The support frame is connected to a filter press plate that is adapted to the inner diameter of the frame and slidably connected to the feed pipe via an electric telescopic rod. The filter press plate can move axially along the feed pipe under the drive of the electric telescopic rod to filter the filter cake in the filter frame.

[0008] Preferably, the filter press plate is hollow inside, and a plurality of air outlet holes with a size smaller than the filter medium pores are evenly opened on the side of the filter press plate near the filter frame. A hot air blower is connected to one side of the filter press plate through an air duct. The hot air blower is used to deliver hot air into the filter press plate and dry the filter cake through the air outlet holes.

[0009] Preferably, it also includes a temperature sensor installed on the filter press plate, the temperature sensor being connected to a controller, and the controller controlling the operating power of the hot air blower based on the temperature signal monitored by the temperature sensor.

[0010] Preferably, the bottom of the housing is also equipped with a collection tank for collecting the filtrate discharged from each drain pipe. The collection tank is also equipped with a liquid level sensor, which is connected to the controller. When the filtrate level in the collection tank reaches a preset height, the controller issues an alarm signal.

[0011] The beneficial effects of this utility model are: by setting multiple sets of filter frames and cooperating with multi-way valves, when one filter frame is blocked, the controller can automatically switch the fluid to other adjacent filter frames, avoiding the entire filtration process from being stopped due to the blockage of a single filter frame, thus significantly improving the filtration efficiency; by using a pressure sensor to monitor the pressure difference between the feed pipe and the drain pipe in real time, the controller can automatically switch the fluid channel according to a preset threshold, without the need for manual intervention, thus reducing the difficulty of operation and labor costs.

[0012] By installing an electric telescopic rod and a filter press plate at one end of the feed pipe near the filter frame, and connecting the filter press plate to a hot air blower, it is possible not only to filter the benzoxazine potassium salt solution after filtration, but also to dry the filter cake remaining on the filter medium, realizing an integrated filtration and drying operation. There is no need to transfer the benzoxazine potassium salt filter cake separately, reducing the loss of benzoxazine potassium salt. Attached Figure Description

[0013] Figure 1 This is a first three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention;

[0015] Figure 3 This is a first cross-sectional view of the present invention.

[0016] Figure 4 This is a second cross-sectional view of the present invention.

[0017] In the diagram: 1. Feed pipe; 2. Drain pipe; 3. Pressure sensor; 4. Multi-way valve; 5. Controller; 6. Frame; 7. Filter medium; 8. Support frame; 9. Electric telescopic rod; 10. Filter press plate; 11. Air outlet; 12. Hot air blower; 13. Temperature sensor; 14. Collection tank; 15. Filter frame one; 16. Filter frame two; 17. Drain pipe one; 18. Drain pipe two; 19. Main feed pipe; 20. First distribution pipe; 21. Second distribution pipe. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0019] The existing benzoxazine potassium salt filtration and drying device mainly includes a housing with a feed pipe 1 at the top, a filter frame installed below the feed pipe 1 and connected to a drain pipe 2 at the bottom, and a pressure sensor 3 installed on the feed pipe 1 and the drain pipe 2. During use, when the pressure sensor 3 detects that the pressure difference between the feed pipe 1 and the drain pipe 2 is greater than a preset threshold, the filtration operation needs to be stopped, and the filter frame needs to be cleaned using physical (hydraulic backwashing, ultrasonic cleaning, mechanical scraping, etc.) or chemical (acid and alkali cleaning, oxidant cleaning, chelating agent cleaning, etc.) methods. The above is an introduction to the existing benzoxazine potassium salt filtration and drying device.

[0020] As can be seen from the above, the existing benzoxazine potassium salt filtration and drying device has the following defects when in use: in the above filtration process, a single filter frame structure is generally used. When filtering benzoxazine potassium salt solution, the filter medium 7, such as microporous filter membrane, is easily blocked by impurities. Once blocked, the entire filtration process must be stopped, the filter frame must be cleaned or replaced, and then the filtration must be restarted. This results in a discontinuous filtration process and seriously affects production efficiency. Based on the above problems, the present invention adopts the following improvement method to solve them.

[0021] like Figure 1-4As shown, a benzoxazine potassium salt filtration and drying device differs from existing technologies in that it incorporates multiple filter frame mechanisms. A multi-port valve 4 is connected to the side of the feed pipe 1 near the filter frame. This multi-port valve 4 is an electrically operated multi-port valve. Each filter frame includes a frame body 6 with its bottom connected to the drain pipe 2 and its top open, and a filter medium 7 installed inside the frame body 6 for solid-liquid separation of the benzoxazine potassium salt solution. The filter medium 7 can be a filter cloth or a microporous membrane, etc. A certain distance exists between the top wall of the frame body 6 and the filter medium 7 to prevent the benzoxazine potassium salt solution from splashing out. The multiple filter frames are installed side-by-side within the housing to accommodate the structure of the multi-port valve 4. Figure 2As shown, this technical solution illustrates two sets of filter frames, namely filter frame one 15 and filter frame two 16. Two drain pipes 2 are named drain pipe one 17 and drain pipe two 18, respectively. The multi-way valve 4 is a three-way valve. The feed pipe 1 includes a main feed pipe 19 connected to one fluid channel of the three-way valve and a first branch pipe 20 and a second branch pipe 21 connected to the other two fluid channels of the three-way valve, respectively. This allows the benzoxazolium potassium salt solution flowing from the main feed pipe 19 to flow along the first branch pipe 20 into filter frame one 15 or along the second branch pipe 21 into filter frame two 16. A controller 5 is installed on the housing. The feed pipe 1 (first branch pipe 20 and second branch pipe 21) and the drain pipe 2... The signal output terminals of pressure sensor 3 are all connected to the signal input terminals of controller 5. During the filtration process of benzoxazine potassium salt solution, filter frame 15 is used to filter the benzoxazine potassium salt solution first. When pressure sensor 3 detects that the pressure difference between the feed pipe 1 and the drain pipe 2 is greater than the preset threshold, it indicates that the filter medium 7 in filter frame 15 is blocked. Controller 5 switches the fluid flow channel by controlling the position of the valve core of multi-way valve 4, realizing automatic switching of filter frames during the fluid filtration process. Specifically, when pressure sensor 3 detects that the pressure difference between the first distribution pipe 20 and the drain pipe 17 is greater than the preset threshold, controller 5 controls multi-way valve 4 to change the position of the valve core, so that the flow to the first distribution pipe 20... The main channel is closed, while the fluid channel to the second distribution pipe 21 is opened, allowing the benzoxazine potassium salt solution to be filtered through the filter medium 7 in the filter frame 26. When the pressure sensor 3 detects that the pressure difference between the second distribution pipe 21 and the drain pipe 28 is also greater than the preset threshold, the controller 5 shuts down the main unit, stops the filtration operation, and cleans the filter frames. The number of filter frames is not limited to two; it can be three, four, or more. The corresponding multi-way valve 4 can be a four-way valve, a five-way valve, or other multi-way valve 4 with more fluid channels to adapt to the filtration rhythm of the benzoxazine potassium salt solution. This process continues until all filter frames are clogged or the benzoxazine potassium salt solution filtration is complete, at which point the process is repeated. After cleaning and filtration, the solid particles remain on the filter medium 7, while the solution passes through the filter medium 7 and is discharged along the drain pipe 2. A collection tank 14 is installed at the bottom of the housing. The collection tank 14 can be used to collect the filtrate discharged from each drain pipe 2. In addition, a liquid level sensor (not shown in the figure) is also installed on the collection tank 14. The liquid level sensor is connected to the controller 5. When the liquid level in the collection tank 14 reaches the preset height, the controller 5 issues an alarm signal. In order to facilitate the staff to know the liquid level in the collection tank 14, the alarm signal is preferably an audible and visual warning signal. After the liquid level in the collection tank 14 reaches the preset height, the door of the housing is opened, the collection tank 14 is replaced or the liquid in the collection tank 14 is removed to prevent the solution from overflowing.

[0022] Furthermore, such as Figure 3-4As shown, after the filtration of the benzoxazine potassium salt solution is completed, the solid particles on the filter medium 7 need to be dried. In this technical solution, a support frame 8 is fixedly installed at one end of each feed pipe 1 near the filter frame. On the side of the support frame 8 near the filter frame, a filter press plate 10 that is adapted to the inner diameter of the frame 6 and slidably connected to the feed pipe 1 is connected by an electric telescopic rod 9. The filter press plate 10 can move axially along the feed pipe 1 under the drive of the electric telescopic rod 9. The filter press plate 10 slides along the inner wall of the frame 6 to press the solid particles in the filter frame to form a filter cake, further removing the moisture in the filter cake. In order to facilitate the control of the running distance of the electric telescopic rod 9, a distance sensor (not shown in the figure), such as an ultrasonic sensor, can be installed at the bottom of the filter press plate 10 to monitor the distance between the filter press plate 10 and the solid particles. Since the distribution of solid particles on the filter medium 7 may be uneven, the thickness of the solid particles located directly below the separator is the thickest and the highest. Conversely, the thickness of solid particles in other parts is relatively small. For example, at the edge of the frame 6, a distance sensor is installed at the edge of the filter press plate 10. The distance measured from the filter press plate 10 to the solid particles with the smallest thickness is used as the travel distance of the electric telescopic rod 9 to prevent the electric telescopic rod 9 from traveling too far and damaging the filter frame. After filtration, the controller 5 controls the electric telescopic rod 9 to return to half or one-third of the distance between the filter press plate 10 and the solid particles with the smallest thickness, so that the filter press plate 10 covers the top opening of the frame 6. At the same time, the filter press plate 10 is set to be hollow, and several air outlet holes 11 with a size smaller than the filter pores of the filter medium 7 are evenly opened on the side of the filter press plate 10 near the filter frame. If the filter medium 7 is a microporous filter membrane, its The pore size is between 0.2 and 1 micrometer. Therefore, the pore size of the ventilation holes should be 0.1-0.3 millimeters to prevent solid particles from entering the filter press 10 through the air outlet 11 during filter cake pressing. A hot air blower 12 is connected to one side of the filter press 10 via a flexible duct (allowing the filter press 10 to move up and down). When current passes through, the heating wire inside the hot air blower 12 generates heat, heating the air. The hot air blower 12 supplies hot air into the filter press 10, drying the filter cake through the air outlet 11. A temperature sensor 13 is installed on the filter press 10; this sensor can be installed inside the filter press 10 or at the bottom of the filter press 10. Figure 3 As shown, the bottom of the filter press plate 10 is concave upwards, and the temperature sensor 13 is installed in this concave area to monitor the temperature of the hot air entering the press in real time. The controller 5 automatically adjusts the operating power of the hot air blower 12 according to the temperature signal to ensure that the drying temperature is stable within the set range, thus avoiding the problems of filter cake sintering due to excessive temperature or incomplete drying due to excessively low temperature.

[0023] It should be noted that, in this document, 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 a process, method, article, or apparatus. Specific examples have been used in this document to illustrate the principles and implementation methods of this utility model. The above examples are merely to aid in understanding the method and core ideas of this utility model. The above descriptions are only preferred embodiments of this utility model. It should be pointed out that, due to the limitations of written expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or variations can be made without departing from the principles of this utility model, and the above technical features can be combined in an appropriate manner. These improvements, modifications, variations, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this utility model.

Claims

1. A benzoxazine potassium salt filtration and drying device, comprising a housing having a feed pipe (1) at the top, a filter frame installed below the feed pipe (1) and connected to a drain pipe (2) at its bottom, and a pressure sensor (3) installed on the feed pipe (1) and the drain pipe (2), characterized in that: The filter frame is configured in multiple groups. The feed pipe (1) is connected to a multi-port valve (4) on the side near the filter frame. A controller (5) is also installed on the housing. The signal output terminals of the pressure sensors (3) on the feed pipe (1) and the drain pipe (2) are connected to the signal input terminal of the controller (5) to provide the controller (5) with the pressure signal in the feed pipe (1) and the drain pipe (2) where the fluid is located. When the pressure sensor (3) detects that the pressure difference between the feed pipe (1) and the drain pipe (2) is greater than the preset threshold, the controller (5) switches the fluid flow channel by controlling the position of the valve core of the multi-port valve (4) to realize the automatic switching of the filter frame during the fluid filtration process.

2. The benzoxazine potassium salt filtration and drying device according to claim 1, characterized in that: The filter frame includes a frame (6) with its bottom connected to the drain pipe (2) and its top open, and a filter medium (7) installed inside the frame (6) for solid-liquid separation of the benzoxazine potassium salt solution.

3. The benzoxazine potassium salt filtration and drying device according to claim 1, characterized in that: Each feed pipe (1) is fixedly installed with a support frame (8) at one end near the filter frame. The support frame (8) is connected to a filter press plate (10) that is adapted to the inner diameter of the frame (6) and is slidably connected to the feed pipe (1) via an electric telescopic rod (9). The filter press plate (10) can move axially along the feed pipe (1) under the drive of the electric telescopic rod (9) to press the filter cake in the filter frame.

4. The benzoxazine potassium salt filtration and drying device according to claim 3, characterized in that: The filter press plate (10) is hollow inside. Several air outlets (11) with a size smaller than the filter holes of the filter medium (7) are evenly opened on the side of the filter press plate (10) near the filter frame. A hot air blower (12) is connected to one side of the filter press plate (10) through an air duct. The hot air blower (12) is used to deliver hot air into the filter press plate (10) and dry the filter cake through the air outlets (11).

5. The benzoxazine potassium salt filtration and drying device according to claim 4, characterized in that: It also includes a temperature sensor (13) installed on the filter press plate (10), the temperature sensor (13) being connected to the controller (5), the controller (5) controlling the operating power of the hot air blower (12) according to the temperature signal monitored by the temperature sensor (13).

6. The benzoxazine potassium salt filtration and drying device according to claim 1, characterized in that: The bottom of the housing is also equipped with a collection tank (14) for collecting the filtrate discharged from each drain pipe (2). The collection tank (14) is also equipped with a liquid level sensor, which is connected to the controller (5). When the liquid level of the filtrate in the collection tank (14) reaches a preset height, the controller (5) issues an alarm signal.

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