A fipronil solid extraction device
By alternating mixing and clarification chambers in the fipronil extraction unit, the use of pipelines is reduced. Short-distance transfer pipelines and adjustable extraction box height solve the problems of difficult cleaning of pipeline crystals and unstable material transfer rate, thereby improving extraction efficiency and separation purity, and achieving cost reduction and efficiency improvement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG FANGHUA CHEM CO LTD
- Filing Date
- 2025-07-03
- Publication Date
- 2026-05-26
AI Technical Summary
In existing fipronil extraction units, crystallization in the pipelines is difficult to clean, resulting in low production efficiency, high risk of pipeline leaks, and unstable material transfer rates, which affect product quality.
By alternating mixing and clarification chambers in the fipronil extraction unit, the use of pipelines is reduced. Short-distance transfer pipelines and adjustable extraction box height are adopted, combined with cylinder drive and limit rod adjustment, to ensure the stability and efficiency of liquid phase flow.
It significantly improves extraction efficiency and separation purity, reduces maintenance frequency and cleaning difficulty, achieves the goal of cost reduction and efficiency improvement, and adapts to the extraction needs of different materials.
Smart Images
Figure CN224270229U_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of fipronil extraction technology, and more specifically, relates to a fipronil solid extraction device. Background Technology
[0002] Fipronil is a broad-spectrum insecticide. During its production, an extraction chamber can be used to extract harmful components from the solid product to increase the effective content of the fipronil. An extraction chamber is an extraction device that uses mechanical stirring to mix components in one container and allows natural clarification by gravity in another, thus achieving separation. However, during the fipronil extraction and purification process, severe entrapment occurs in the clarification chamber, affecting purification efficiency.
[0003] In existing industrial extraction processes, multiple extraction tanks connected in series are typically used to form an extraction line. The aqueous and organic phases of the extraction tanks are connected to the mixing chamber from the end of the clarification chamber through pipes. Multiple extractions are used to improve the purity of the obtained fipronil. In existing extraction lines, the mixing chamber and the clarification chamber are in the same row, and the pipes from the clarification chamber to the mixing chamber are long, requiring a large amount of pipework for construction. For example, a waste solvent washing device and a washing system for nuclear fuel reprocessing plants disclosed in Chinese invention patent literature (CN202311560823.5) achieves alternating extraction and washing by setting up multiple mixing and clarification stages in parallel between the organic phase inlet and the organic phase outlet. However, this method is difficult to clean due to pipe crystallization, requiring a large amount of manpower and resources to stop production for cleaning and unloading, increasing operational risks and reducing production efficiency. At the same time, due to the differences in the composition and viscosity of different materials, the material transfer rate will also vary, resulting in unstable extraction effects and affecting product quality.
[0004] Therefore, we need a fipronil solid extraction device that is simple to operate and can reduce pipeline usage by alternating extraction tanks, thereby reducing costs and increasing efficiency, shortening maintenance and cleaning time, and adjusting the material transfer rate to improve the applicability of the device. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide a fipronil solid extraction device with a reasonable structure. By directly transferring the liquid phase containing fipronil in the clarification chamber to the mixing chamber of the adjacent extraction tank, the use of pipelines is reduced, the risk of pipeline leakage is avoided, the maintenance frequency and cleaning difficulty are reduced, and the purpose of cost reduction and efficiency improvement is achieved. At the same time, the material transfer rate is adjusted to improve the applicability of the device.
[0006] The present invention discloses a fipronil solid extraction device, comprising a frame and several extraction boxes disposed inside the frame, the extraction boxes being used for continuous extraction of fipronil raw material.
[0007] The extraction chamber includes a mixing chamber and a clarification chamber, which are separated by a partition plate. The mixing chamber and clarification chamber of adjacent extraction chambers are arranged alternately to allow the organic solvent containing fipronil and the aqueous phase in the clarification chamber to flow directly to the mixing chamber of the adjacent extraction chamber for extraction, thereby reducing the use of pipelines and achieving the purpose of cost reduction and efficiency improvement.
[0008] A support platform is provided on one side of the frame, and a single extraction box is placed on the upper part of the support platform. Adjacent extraction boxes are detachably connected, and the outer walls of adjacent extraction boxes are in contact and slidably connected. This is used to adjust the height of different extraction boxes and to form a multi-stage extraction gradient with the height of the extraction boxes gradually decreasing along the flow direction of the extraction liquid phase. This facilitates the adaptation to the extraction needs of materials with different viscosities or different extraction efficiencies, achieving better applicability.
[0009] The clarification chamber of the extraction chamber is equipped with a transfer pipeline on the side away from the mixing chamber. This pipeline is used to transfer the organic solvent containing fipronil and the aqueous phase in the clarification chamber to the mixing chamber of an adjacent extraction chamber located on the side along the flow direction of the extraction liquid phase. The transfer pipeline is designed with a short distance to reduce the use of pipe materials.
[0010] As a further improvement of this utility model, the mixing chamber is equipped with a motor and a stirrer. The motor is detachably installed on the top of the mixing chamber, and the stirrer is located inside the mixing chamber. The output shaft of the motor is detachably connected to the stirrer and is used to drive the stirrer to mix the aqueous phase and the organic solvent containing fipronil evenly. The evenly mixed liquid phase overflows into the clarification chamber through the partition plate.
[0011] As a further improvement of this utility model, a cylinder is provided on the side of the frame away from the support platform, and a support plate is provided on the top of the cylinder. An extraction box is placed on the surface of the support plate. The cylinder drives the support plate to move the extraction box up and down, which is used to adjust the longitudinal drop between adjacent extraction boxes, so as to adjust the liquid phase flow speed by controlling the magnitude of gravitational potential energy, while avoiding liquid phase backflow.
[0012] As a further improvement of this utility model, limiting platforms are provided on the front and rear sides of the extraction box, and an adjusting rod is provided between adjacent extraction boxes. The two ends of the adjusting rod are rotatably connected to the adjacent limiting platforms to adjust the distance between the limiting platforms of adjacent extraction boxes. This is to avoid the pipeline connection being obstructed due to misalignment when adjusting the height of the extraction box, which would affect the liquid phase transfer efficiency.
[0013] As a further improvement of this utility model, the adjusting rod includes a main slide groove and a secondary slide rod, which are slidably connected to achieve adjustment of the length of the adjusting rod; the main slide groove and the secondary slide rod at the limiting platform are each provided with a pair of limiting holes, and limiting rods are detachably connected to the limiting holes to keep the main slide groove and the secondary slide rod at the same limiting platform from rotating relative to each other, thereby ensuring that the adjusting rods are all on the same straight line, the extraction box can be precisely connected to the transfer pipeline, and the stability and ease of operation of the overall device are improved.
[0014] As a further improvement of this utility model, the clarification chamber is provided with an aqueous phase reflux device and an organic solvent reflux device. The aqueous phase reflux device and the organic solvent reflux device are respectively detachably installed on the wall of the clarification chamber, and are used to reflux the aqueous phase and the organic solvent to the mixing chamber of the extraction box on the adjacent side along the liquid phase flow direction of the liquid phase extraction.
[0015] As a further improvement of this utility model, a pair of liquid inlets are opened at the top of the mixing chamber. The aqueous phase reflux device and organic solvent reflux device of the adjacent extraction tank on the side opposite to the flow direction of the extraction liquid phase are connected through a transfer pipeline to ensure that the liquid inlets can be accurately connected to the transfer pipeline, ensuring smooth and leak-free reflux liquid and reducing losses during the extraction process.
[0016] As a further improvement of this utility model, a slag discharge port is provided at the bottom of the clarification chamber for discharging the slag from the raw materials in the clarification chamber after fipronil has been removed.
[0017] Compared to existing technologies, the advantages of this invention are as follows: By alternating the mixing and clarification chambers of the extraction box, multi-stage separation of the residue after fipronil removal from the raw material is achieved, significantly improving extraction efficiency and separation purity while reducing pipeline usage, thus saving costs and achieving cost reduction and efficiency improvement; by setting extraction boxes with adjustable heights, a multi-stage extraction gradient is formed along the flow direction of the extraction liquid phase through the sliding of the outer walls of adjacent extraction boxes, improving the efficiency of the extraction process transfer through the potential energy difference in height between adjacent extraction boxes; by setting a cylinder-driven support plate, the height spacing of the extraction boxes can be flexibly adjusted to meet the extraction speed requirements of organic solvents with different viscosities; by setting a linkage mechanism between the limit rod and the adjustment rod, the height of each extraction box is synchronized during cylinder driving, avoiding misalignment that could lead to poor pipeline connection and affect the stable use of the extraction box. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the extraction box of this utility model;
[0020] Figure 3 This is a schematic diagram of the adjusting rod structure of this utility model;
[0021] Figure 4 This is a schematic diagram of the extraction box pipeline structure of this utility model.
[0022] Explanation of the labels in the diagram:
[0023] 1. Frame, 11. Support platform, 12. Cylinder, 13. Support plate, 2. Extraction box, 21. Mixing chamber, 211. Motor, 212. Stirrer, 213. Liquid inlet, 22. Clarification chamber, 221. Aqueous phase reflux device, 222. Organic solvent reflux device, 23. Limiting platform, 24. Adjusting rod, 241. Main slide, 242. Secondary slide, 243. Limiting rod, 25. Slag discharge port, 26. Divider plate, 3. Transfer pipeline. Detailed Implementation
[0024] Specific Implementation Example 1: Please refer to... Figures 1-4 A fipronil solid extraction device includes a frame 1 and several extraction boxes 2 disposed inside the frame 1, the extraction boxes 2 being used for continuous extraction of raw materials.
[0025] Extraction chamber 2 includes a mixing chamber 21 and a clarification chamber 22, which are separated by a partition plate 26. The mixing chamber 21 and clarification chamber 22 of adjacent extraction chambers 2 are arranged alternately to allow the organic solvent and aqueous phase in the clarification chamber 22 to flow directly to the mixing chamber 21 of the adjacent extraction chamber 2 for extraction, thereby reducing the use of pipelines and achieving the purpose of cost reduction and efficiency improvement.
[0026] A support platform 11 is provided on one side of the frame 1. A single extraction box 2 is placed on the upper part of the support platform 11. Adjacent extraction boxes 2 are detachably connected. The outer walls of adjacent extraction boxes 2 are in contact and slidably connected to adjust the height of different extraction boxes 2, thereby forming a multi-stage extraction gradient with the height of the extraction boxes 2 gradually decreasing along the flow direction of the extraction liquid phase. This facilitates the adaptation to the extraction needs of materials with different viscosities or different extraction efficiencies, achieving better applicability. At the same time, the potential energy difference in height between adjacent extraction boxes 2 improves the efficiency of the transfer process in the extraction process.
[0027] The clarification chamber 22 of the extraction chamber 2 is provided with a transfer pipe 3 on the side away from the mixing chamber 21, which is used to transfer the organic solvent containing fipronil and the aqueous phase in the clarification chamber 22 to the mixing chamber 21 of the adjacent extraction chamber 2 on the side close to its location along the flow direction of the extraction liquid phase; the transfer pipe 3 adopts a short-distance design to reduce the use of pipe materials.
[0028] Specifically, such as Figure 2 The mixing chamber 21 shown is equipped with a motor 211 and a stirrer 212. The motor 211 is detachably installed on the top of the mixing chamber 21, and the stirrer 212 is located inside the mixing chamber 21. The output shaft of the motor 211 is detachably connected to the stirrer 212 and is used to drive the stirrer 212 to mix the aqueous phase and the organic solvent containing fipronil evenly. The evenly mixed liquid phase overflows into the clarification chamber 22 through the partition plate 26.
[0029] Specifically, the extraction tank 2 is provided with limiting platforms 23 on both the front and rear sides, and an adjusting rod 24 is provided between adjacent extraction tanks 2. The two ends of the adjusting rod 24 are rotatably connected to the adjacent limiting platforms 23 to adjust the distance between the limiting platforms 23 of adjacent extraction tanks 2. This is to prevent misalignment during the height adjustment of the extraction tank 2, which could lead to poor pipe connection between adjacent extraction tanks 2 and affect the liquid phase transfer efficiency.
[0030] Specifically, such as Figure 3 The adjusting rod 24 shown includes a main slide groove 241 and a secondary slide rod 242, which are slidably connected to adjust the length of the adjusting rod 24. The main slide groove 241 and the secondary slide rod 242 at the limiting platform 23 are each provided with a pair of limiting holes. A limiting rod 243 is detachably connected to the limiting holes to keep the main slide groove 241 and the secondary slide rod 242 at the same limiting platform 23 from rotating relative to each other, thereby ensuring that the adjusting rods 24 are all on the same straight line. The extraction box 2 can be precisely connected to the transfer pipeline 3, improving the stability and ease of operation of the overall device.
[0031] Specifically, such as Figure 4 A cylinder 12 is provided on the side of the frame 1 away from the support platform 11. A support plate 13 is provided on the top of the cylinder 12. An extraction box 2 is placed on the surface of the support plate 13. The cylinder 12 drives the support plate 13 to move the extraction box 2 up and down, which is used to adjust the longitudinal drop between adjacent extraction boxes 2, so as to adjust the liquid phase flow speed by controlling the magnitude of gravitational potential energy, while avoiding liquid phase backflow.
[0032] Specifically, the clarification chamber 22 is equipped with an aqueous phase reflux device 221 and an organic solvent reflux device 222. The aqueous phase reflux device 221 and the organic solvent reflux device 222 are detachably installed on the wall of the clarification chamber 22, and are used to reflux the aqueous phase and the organic solvent to the mixing chamber 21 of the extraction box 2 on the side adjacent to the liquid phase flow direction of the liquid phase extraction.
[0033] Specifically, the top of the mixing chamber 21 has a pair of liquid inlets 213, which are connected to the aqueous phase reflux device 221 and the organic solvent reflux device 222 of the adjacent extraction tank 2 on the side opposite to the flow direction of the extraction liquid phase, respectively, through the transfer pipeline 3. This ensures that the liquid inlets 213 can be precisely connected to the transfer pipeline 3, ensuring smooth and leak-free reflux and reducing losses during the extraction process.
[0034] Specifically, the bottom of the clarification chamber 22 has a slag discharge port 25, which is used to discharge the slag from the raw material in the clarification chamber 22 after fipronil has been removed.
[0035] During operation, the cylinder 12 adjusts the support plate 13 to create a multi-stage extraction gradient with gradually decreasing height along the flow direction of the extraction liquid phase. The initial aqueous phase, organic solvent, and fipronil-containing raw material are added to the mixing chamber 21 of the highest extraction chamber 2 located on the support platform 11 and mixed after stirring by the stirrer 22. The mixed liquid phase overflows into the clarification chamber 22 through the separator 26. The residue after removing fipronil from the raw material settles to the bottom and is discharged through the slag outlet 25, and the clear liquid separates into layers. The aqueous phase and organic solvent are transferred to the next lower extraction chamber 2 through the transfer pipeline 3 via the aqueous phase reflux device 221 and the organic solvent reflux device 222, respectively. The liquid is introduced through the inlet 213, and after being mixed again in the mixing chamber 21 of the extraction tank 2, it is clarified in the clarification chamber 22 of the extraction tank 2. The aqueous phase and organic solvent are then transferred to the next extraction tank 2 via the transfer pipeline 3 through the aqueous phase reflux device 221 and the organic solvent reflux device 222, respectively, to achieve multi-stage extraction. Through the optimized structure of the extraction tank 2, the organic solvent and aqueous phase in the clarification chamber 22 flow directly to the mixing chamber 21 of the adjacent extraction tank 2 for extraction, reducing the use of pipelines, reducing the risk of leakage, improving extraction efficiency, shortening maintenance time, effectively reducing environmental pollution, and achieving the goal of manufacturing cost reduction and efficiency improvement.
[0036] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.
Claims
1. A fipronil solid extraction apparatus, characterized by: It includes a frame (1) and several extraction boxes (2) set inside the frame (1), the extraction boxes (2) being used for continuous extraction of raw materials; The extraction chamber (2) includes a mixing chamber (21) and a clarification chamber (22), which are separated by a partition plate (26); the mixing chamber (21) and the clarification chamber (22) of adjacent extraction chambers (2) are arranged alternately to allow the organic solvent containing fipronil and the aqueous phase in the clarification chamber (22) to flow directly to the mixing chamber (21) of the adjacent extraction chamber (2) for extraction; The frame (1) is provided with a support platform (11) on one side. A single extraction box (2) is placed on the upper part of the support platform (11). Adjacent extraction boxes (2) are detachably connected. The outer walls of adjacent extraction boxes (2) are in contact and slidably connected to each other. This is used to adjust the height of different extraction boxes (2) and to form a multi-level extraction gradient with the height of the extraction box (2) gradually decreasing along the flow direction of the extraction liquid phase, so as to adapt to the extraction needs of different materials. The clarification chamber (22) of the extraction chamber (2) is provided with a transfer pipe (3) on the side away from the mixing chamber (21) for transferring the organic solvent and aqueous phase of the clarification chamber (22) to the mixing chamber (21) of the adjacent extraction chamber (2) on the side close to its position along the flow direction of the extraction liquid phase.
2. The fipronil solid extraction device according to claim 1, wherein The mixing chamber (21) is equipped with a motor (211) and a stirrer (212). The motor (211) is detachably installed on the top of the mixing chamber (21), and the stirrer (212) is located inside the mixing chamber (21). The output shaft of the motor (211) is detachably connected to the stirrer (212) to drive the stirrer (212) to mix the aqueous phase and the organic solvent containing fipronil evenly. The evenly mixed liquid phase overflows into the clarification chamber (22) through the partition plate (26).
3. The fipronil solid extraction device according to claim 1, wherein A cylinder (12) is provided on the side of the frame (1) away from the support platform (11). A support plate (13) is provided on the top of the cylinder (12). An extraction box (2) is placed on the surface of the support plate (13). The cylinder (12) drives the support plate (13) to move the extraction box (2) up and down, which is used to adjust the longitudinal drop between adjacent extraction boxes (2).
4. The fipronil solid extraction device of claim 1, wherein, The extraction box (2) is provided with limiting platforms (23) on the front and rear sides. An adjusting rod (24) is provided between adjacent extraction boxes (2). The two ends of the adjusting rod (24) are rotatably connected to the adjacent limiting platforms (23) to adjust the distance between the limiting platforms (23) of the adjacent extraction boxes (2) and to avoid the pipeline connection being obstructed due to misalignment when the height of the extraction box (2) is adjusted.
5. A fipronil solid extraction device according to claim 4, wherein The adjusting rod (24) includes a main slide groove (241) and a secondary slide rod (242). The main slide groove (241) and the secondary slide rod (242) are slidably connected to adjust the length of the adjusting rod (24). The main slide groove (241) and the secondary slide rod (242) at the limiting platform (23) have a pair of limiting holes. A limiting rod (243) can be detachably connected to the limiting holes to keep the main slide groove (241) and the secondary slide rod (242) at the same limiting platform (23) from rotating relative to each other.
6. The fipronil solid extraction apparatus according to claim 1, characterized in that, The clarification chamber (22) is equipped with an aqueous phase reflux device (221) and an organic solvent reflux device (222). The aqueous phase reflux device (221) and the organic solvent reflux device (222) are respectively detachably installed on the wall of the clarification chamber (22) to reflux the aqueous phase and the organic solvent containing fipronil to the mixing chamber (21) of the extraction box (2) on the adjacent side along the liquid phase flow direction of the liquid phase extraction.
7. The fipronil solid extraction apparatus according to claim 6, characterized in that, The mixing chamber (21) has a pair of liquid inlets (213) at the top. The aqueous phase reflux device (221) and organic solvent reflux device (222) of the extraction tank (2) are connected through the transfer pipeline (3) to the side opposite to the flow direction of the extraction liquid phase. The inner wall of the liquid inlet (213) is slidably connected to the outer wall of the transfer pipeline (3) to ensure smooth reflux without leakage and reduce losses during the extraction process.
8. The fipronil solid extraction apparatus according to claim 1, characterized in that: The bottom of the clarification chamber (22) has a slag discharge port (225) for discharging the slag from the raw material after removing fipronil in the clarification chamber (22).