An extraction solvent recovery device for reducing the consumption of oxadiazon dichlorophenol.

Abstract

This invention discloses an extraction solvent recovery device for reducing the unit consumption of dichlorophenol (oxadiazon), belonging to the field of chemical equipment. The device includes: an extraction vessel, rotatably connected to a stirring shaft, with a partition plate attached to the inner wall of the extraction vessel. The partition plate has several evenly distributed sedimentation ports. A lifting frame is slidably connected to the stirring shaft, with sealing plates corresponding to each sedimentation port. A lifting assembly is connected to the partition plate, and the lifting assembly is driven by a drive mechanism. This assembly moves the lifting frame and the sealing plates, sealing the sedimentation ports and thus isolating the upper and lower layers of liquid within the extraction vessel, allowing for the extraction of the upper layer. Simultaneously, by isolating the upper and lower solutions within the extraction vessel, the device effectively improves the convenience and efficiency of phenol recovery, solving the problem of high unit consumption of dichlorophenol in existing solutions.

Description

Technical Field

[0001] This invention relates to the field of chemical equipment, and in particular to an extraction solvent recovery device for reducing the consumption of dichlorophenol by oxadiazon. Background Technology

[0002] Oxalide is mainly used to control a variety of annual monocot and dicot weeds, primarily in paddy fields, but also effective against peanuts, cotton, and sugarcane in dry fields. It is a contact pre-emergence and post-emergence herbicide. It is characterized by high efficiency, long-lasting effect, broad spectrum, low dosage, safety for humans, animals, and the environment, and mild effects on insect predators and beneficial organisms.

[0003] Dichlorophenol is one of the key intermediate raw materials for the synthesis of oxadiazon, and its cost accounts for a significant proportion of the total production cost of oxadiazon. Current preparation processes use phenol and phosgene to react and produce diphenyl carbonate (DPC), which is a key intermediate in the synthesis of oxadiazon from dichlorophenol. Currently, in the industry's oxadiazon synthesis processes, the inconvenience and low efficiency of phenol recovery result in generally high dichlorophenol consumption, leading to resource waste and increased environmental pressure.

[0004] Therefore, how to recover phenol, solve the problem of low utilization rate of dichlorophenol in the synthesis process, and reduce the consumption of dichlorophenol has become an urgent problem to be solved. Summary of the Invention

[0005] This invention provides an extraction solvent recovery device for reducing the consumption of dichlorophenol, which can solve the problems of inconvenient phenol recovery, low recovery efficiency, and high consumption of dichlorophenol in the prior art.

[0006] An extraction solvent recovery device for reducing the consumption of dichlorophenol (oxadiazon) includes: an extraction vessel, a stirring shaft rotatably connected to the extraction vessel, and a drive mechanism connected to the stirring shaft. The stirring shaft is fixedly connected to an isolation plate that fits against the inner wall of the extraction vessel, and the isolation plate has several sedimentation ports evenly distributed on it. A lifting frame is slidably connected to the stirring shaft, and the lifting frame is connected to several stirring rods and sealing plates corresponding to the sedimentation ports. A lifting assembly is connected to the stirring shaft and is driven by the drive mechanism. The lifting assembly drives the lifting frame to move up and down, and the lifting frame drives the sealing plates to move, thereby sealing the sedimentation ports and isolating the upper and lower layers of liquid in the extraction vessel, and extracting the upper layer of liquid.

[0007] As a preferred embodiment of the present invention, a rotating plate is fixedly connected to the outer wall of the stirring shaft, and the rotating plate is rotatably connected to the extraction vessel.

[0008] As a preferred embodiment of the present invention, the stirring shaft has a liquid extraction hole facing downward from its upper end face, and the side wall of the stirring shaft has a liquid outlet communicating with the liquid extraction hole. The lower side of the liquid outlet is not lower than the lower surface of the isolation plate, and is used to extract the solution above the isolation plate through the liquid outlet and the liquid extraction hole.

[0009] As a preferred embodiment of the present invention, the driving mechanism includes a mounting bracket fixedly connected to the extraction vessel, the mounting bracket being connected to a mounting base and a worm gear being rotatably connected; the mounting base is fixedly connected to a motor, the motor and the worm gear are connected by transmission, and the stirring shaft is fixedly connected to a worm wheel that meshes with the worm gear.

[0010] As a preferred embodiment of the present invention, the mounting base is rotatably connected to a transmission shaft, the transmission shaft is fixedly connected to a driving bevel gear and a driven gear, the output end of the motor is fixedly connected to a driving gear that meshes with the driven gear, and the rotating shaft of the worm gear is fixedly connected to a driven bevel gear that meshes with the driving bevel gear.

[0011] In a preferred embodiment of the present invention, the mounting base and the mounting bracket are slidably connected, and the mounting bracket is fixedly connected to a telescopic device, the telescopic end of which is connected to the mounting base; the transmission shaft is fixedly connected to a drive gear; the lifting assembly includes a rotating ring and a rotating shaft rotatably connected to a rotating plate; an outer gear ring meshing with the drive gear is fixedly connected to the outer wall of the rotating ring, and an inner gear ring is fixedly connected to the inner wall of the rotating ring; a gear meshing with the inner gear ring is fixedly connected to the upper end of the rotating shaft, and a lead screw is fixedly connected to the lower end of the rotating shaft, and the lead screw is threadedly connected to the lifting frame, for driving the mounting base to move through the telescopic device to achieve power switching; when the drive bevel gear meshes with the driven bevel gear, the drive gear separates from the outer gear ring, and when the drive gear meshes with the outer gear ring, the drive bevel gear separates from the driven bevel gear.

[0012] As a preferred embodiment of the present invention, the isolation plate is fixedly connected with guide rods that correspond one-to-one with the sealing plate, and the guide rods are movably interlocked with the lifting frame.

[0013] As a preferred embodiment of the present invention, the sealing plate is fixedly connected to a support shaft, the support shaft is rotatably connected to the lifting frame, and a driven worm gear is fixedly connected to one end of the support shaft; the lifting frame is rotatably connected to a driving worm gear that meshes with the driven worm gear, and a traveling gear is fixedly connected to the rotating shaft of the driving worm gear; the guide rod is axially provided with a clearance groove, and a rack that meshes with the traveling gear is installed in the clearance groove, so that when the lifting frame moves up and down, the traveling gear meshes with the rack to drive the sealing plate to flip; and when the lifting frame moves toward the isolation plate, the sealing plate gradually flips to a state parallel to the isolation plate.

[0014] As a preferred embodiment of the present invention, the stirring shaft is rotatably connected to the mounting bracket.

[0015] As a preferred embodiment of the present invention, a sealing ring is provided on the periphery of the sealing plate to achieve a seal with the inner wall of the sedimentation port.

[0016] The present invention has the following beneficial effects: This invention uses a lifting assembly to raise and lower a lifting frame, which in turn moves a sealing plate to seal the sedimentation port. This isolates the upper and lower layers of liquid in the extraction vessel, facilitating the extraction of the upper layer and preventing the lower layer from mixing with the upper solution during extraction. This effectively improves the purity and efficiency of the recovered solution, saves on raw material usage, and helps reduce the consumption of dichlorophenol and the environmental pressure during production. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an extraction solvent recovery device for reducing the single consumption of oxadiazon dichlorophenol provided by the present invention; Figure 2 for Figure 1 A structural diagram from a rear-view perspective; Figure 3 for Figure 1 The main view; Figure 4 for Figure 3 Sectional view at point AA; Figure 5 A half-sectional view of the stirring shaft, partition plate, and rotating plate; Figure 6 This is a structural diagram of the stirring shaft and the lifting frame; Figure 7 for Figure 6 A structural diagram viewed from below; Figure 8 for Figure 6 Enlarged view of the structure of section B in the middle; Figure 9 This is a structural diagram of the lifting frame and the sealing plate; Figure 10 This is a schematic diagram of the structure when the sealing plate is in a horizontal position. Figure 11 A schematic diagram of the stirring shaft and lifting frame when the sealing plate is in a horizontal position; Figure 12 This is a schematic diagram of the structure after the sealing plate has sealed the sedimentation port; Figure 13 This is a schematic diagram of the structure of the stirring shaft and lifting frame after the sealing plate blocks the sedimentation port; Figure 14 for Figure 12 The front view.

[0018] Explanation of reference numerals in the attached figures: 1-Extraction vessel, 2-Stirring shaft, 3-Lifting frame, 4-Sealing plate, 5-Motor, 6-Rotating shaft, 101-Mounting bracket, 102-Mounting base, 103-Worm gear, 104-Driving bevel gear, 105-Driven wheel, 106-Driven bevel gear, 107-Driving gear, 108-Transmission shaft, 201-Isolation plate, 202-Sedimentation port, 203-Rotating plate, 204-Liquid extraction hole, 205 - Liquid outlet, 206- Worm gear, 207- Rotating ring, 208- External gear ring, 209- Internal gear ring, 301- Stirring rod, 401- Guide rod, 402- Support shaft, 403- Driven worm gear, 404- Driving worm gear, 405- Traveling gear, 406- Circumvention groove, 407- Rack, 408- Sealing ring, 501- Driving wheel, 502- Telescopic device, 601- Gear, 602- Lead screw. Detailed Implementation

[0019] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0020] Example 1

[0021] like Figures 1 to 3 As shown in the figure, an extraction solvent recovery device for reducing the unit consumption of oxadiazon dichlorophenol provided by an embodiment of the present invention includes an extraction vessel 1, a stirring shaft 2 rotatably connected to the extraction vessel 1, and a drive mechanism connected thereto. The drive mechanism is connected to the stirring shaft 2 in a transmission connection. The stirring shaft 2 is fixedly connected to an isolation plate 201 that is attached to the inner wall of the extraction vessel 1, and the isolation plate 201 is evenly provided with four to eight sedimentation ports 202.

[0022] like Figures 4-6 As shown in the attached diagram, the number of sedimentation ports 202 is four, and each sedimentation port 202 is a circular hole structure. The stirring shaft 2 is slidably connected to the lifting frame 3, which is connected to several stirring rods 301 and sealing plates 4 corresponding to the sedimentation ports 202.

[0023] Specifically, the lifting frame 3 includes a bushing, which is fitted onto the outer wall of the stirring shaft 2. The bushing and the stirring shaft 2 can be connected by a guide key, or by one or more rectangular channels opened on the outer wall of the stirring shaft 2. Threaded holes are opened on the side wall of the bushing, and screws are threaded to them. The screw ends are inserted into the rectangular channels to limit the position of the bushing and the stirring shaft 2 in the circumferential direction, and the bushing can move axially along the stirring shaft 2. Four stirring rods 301 are welded to the outer wall of the bushing. The four stirring rods 301 are arranged in an array along the circumferential direction of the bushing, and a circular frame is welded to the four stirring rods 301, so that the bushing, stirring rods 301, and circular frame together constitute the lifting frame 3 structure.

[0024] The stirring shaft 2 is connected to a lifting assembly, which can be a cylinder, an electric push rod, or a screw lifting mechanism, and is connected to the drive mechanism for transmission. The lifting assembly is used to drive the lifting frame 3 to rise and fall, and the lifting frame 3 is used to drive the sealing plate 4 to move. The sealing plate 4 is used to seal the sedimentation port 202, thereby isolating the upper and lower layers of liquid in the extraction vessel 1 and extracting the upper layer of liquid.

[0025] Specifically, such as Figure 2 and 3 As shown, a rotating plate 203 is fixedly connected to the outer wall of the stirring shaft 2, and the rotating plate 203 is rotatably connected to the cover of the extraction vessel 1 through a rotary support. The driving mechanism includes a mounting bracket 101 fixedly connected to the extraction vessel 1, and the stirring shaft 2 is rotatably connected to the mounting bracket 101, thereby further improving the stability of the stirring shaft 2.

[0026] Mounting bracket 101 is connected to mounting base 102, and worm gear 103 is rotatably connected via a bearing. Motor 5 is fixedly connected to mounting base 102 via a motor bracket, and motor 5 is connected to worm gear 103 via a transmission connection. Mounting base 102 is rotatably connected to drive shaft 108, which is fixedly connected to driving bevel gear 104 and driven wheel 105. The output end of motor 5 is fixedly connected to driving wheel 501, which meshes with driven wheel 105. The shaft of worm gear 103 is fixedly connected to driven bevel gear 106, which meshes with driving bevel gear 104. This allows motor 5 to drive worm gear 103 to rotate via drive shaft 108. Furthermore, stirring shaft 2 is fixedly connected to worm wheel 206, which meshes with worm gear 103. When motor 5 stops outputting power, the self-locking property of the worm wheel and worm gear ensures that the circumferential position of stirring shaft 2 remains fixed.

[0027] like Figure 2 , 3 As shown in Figures 5 and 6, in this embodiment, the mounting base 102 and the mounting bracket 101 are slidably connected by a guide rail slider assembly. The mounting bracket 101 is fixedly connected to a telescopic device 502, which is an electric push rod. The telescopic end of the telescopic device 502 is connected to the mounting base 102.

[0028] A drive gear 107 is fixedly connected to the drive shaft 108. The lifting assembly includes a rotating ring 207 and a rotating shaft 6 that are rotatably connected to the rotating plate 203. The rotating ring 207 is rotatably connected to the rotating plate 203 via an annular guide rail and a slider assembly. An external gear ring 208 that meshes with the drive gear 107 is fixedly connected to the outer wall of the rotating ring 207, and an internal gear ring 209 is fixedly connected to the inner wall of the rotating ring 207.

[0029] The upper end of the rotating shaft 6 is fixedly connected to a gear 601 that meshes with the internal gear ring 209, and the lower end of the rotating shaft 6 is fixedly connected to a lead screw 602. The lead screw 602 is threadedly connected to a nut installed on the lifting frame 3. The mounting base 102 is moved by the telescopic device 502 to realize power switching. When the driving bevel gear 104 meshes with the driven bevel gear 106, the driving gear 107 is separated from the external gear ring 208. At this time, the motor 5 drives the stirring shaft 2 to rotate through the transmission shaft 108, the worm 103 and the worm wheel 206, thereby driving the lifting frame 3 to rotate through the stirring shaft 2. The stirring rod 301 is used to stir, which improves the reaction efficiency between the solutions inside the extraction vessel 1. After the reaction is completed, the stirring shaft 2 stops rotating and waits for the solution to separate into layers.

[0030] like Figures 12-14 As shown, after the solution to be extracted separates into layers, the mounting base 102 is moved by the telescopic device 502, causing the driving gear 107 to mesh with the external gear ring 208, while the driving bevel gear 104 separates from the driven bevel gear 106. At this time, the motor 5 drives the rotating ring 207 to rotate through the transmission shaft 108, the driving gear 107, and the external gear ring 208. The rotating ring 207 drives the rotating shaft 6 to rotate through the internal gear ring 209 and the gear 601, and then drives the lifting frame 3 to move through the lead screw 602. If the solution is stirred during the movement, causing mixing, the sealing plate 4 on the lifting frame 3 can stop moving when it is close to the sedimentation port 202. After the solution has separated into layers, the lifting frame 3 can be moved again so that the sealing plate 4 can be inserted into the sedimentation port 202, thus sealing the sedimentation port 202. This allows the isolation plate 201 and the sealing plate 4 to separate the interior of the extraction vessel 1 into two independent spaces. At this time, the solution above the isolation plate 201 can be extracted separately without bringing in different solutions from the lower layer, thereby improving the purity of the recovered raw materials.

[0031] It should be noted that the total solution volume in extraction vessel 1 before the reaction can be flexibly adjusted according to the actual reaction process. It is sufficient to ensure that the interface between the upper and lower layers of solution after precipitation is not higher than the upper surface of the separator 201 to guarantee the purity of the extracted upper layer solution. The lower layer solution can be discharged through the outlet at the bottom of extraction vessel 1. Discharge should be stopped when a certain amount is reached to avoid mixing with the upper precipitated solution, thus ensuring the purity of the extracted lower layer solution. Then, the solution to be extracted can be added again, and the above process can be repeated.

[0032] To improve the ease of extracting the upper precipitated solution, the stirring shaft 2 has a suction hole 204 facing downwards from its upper end, and a liquid outlet 205 communicating with the suction hole 204 is provided on the side wall of the stirring shaft 2. The lower side of the liquid outlet 205 is not lower than the lower surface of the isolation plate 201. The upper end of the stirring shaft 2 can be connected to a pipeline through a rotary joint. By using a pump or by pressurizing the inside of the extraction vessel 1, the solution above the isolation plate 201 can be extracted through the liquid outlet 205 and the suction hole 204.

[0033] Example 2

[0034] like Figures 6-9 As shown, based on Embodiment 1, the isolation plate 201 is fixedly connected to a guide rod 401 corresponding to the sealing plate 4, and the guide rod 401 is movably inserted and connected to the lifting frame 3. The sealing plate 4 is fixedly connected to a support shaft 402, which is arranged radially along the sealing plate 4. The support shaft 402 is rotatably connected to the lifting frame 3 through a bearing with a seat, and a driven worm gear 403 is fixedly connected to one end of the support shaft 402.

[0035] The lifting frame 3 is rotatably connected to a driving worm 404 that meshes with the driven worm gear 403, and the shaft of the driving worm 404 is fixedly connected to a traveling gear 405. The guide rod 401 is axially provided with a clearance groove 406, and a rack 407 that meshes with the traveling gear 405 is installed in the clearance groove 406. When the lifting frame 3 moves up and down, the traveling gear 405 meshes with the rack 407 to drive the sealing plate 4 to flip.

[0036] When the lifting frame 3 moves away from the isolation plate 201, and the traveling gear 405 meshes with the rack 407, the sealing plate 4 flips and tilts. At this time, the stirring shaft 2 drives the lifting frame 3 to rotate, and the sealing plate 4 can be used to improve the stirring effect.

[0037] like Figures 10-12 As shown, when the lifting frame 3 moves toward the isolation plate 201, the sealing plate 4 gradually flips to a state parallel to the isolation plate 201, and as the lifting frame 3 moves, the sealing plate 4 completes the sealing of the sedimentation port 202.

[0038] Meanwhile, sealing rings 408 are installed around the perimeter of the sealing plate to achieve a seal between the sealing rings 408 and the inner wall of the sedimentation port 202, ensuring a sealing effect. Furthermore, sealing rings can also be installed around the perimeter of the isolation plate 201 to improve the sealing effect with the inner wall of the extraction vessel 1, thereby ensuring an overall sealing effect and improving the reliability of extraction and recovery.

[0039] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. An extraction solvent recovery device for reducing the unit consumption of oxadiazon dichlorophenol, comprising an extraction vessel (1), wherein the extraction vessel (1) is rotatably connected to a stirring shaft (2), and a drive mechanism is connected thereto, the drive mechanism being drively connected to the stirring shaft (2), characterized in that: The stirring shaft (2) is fixedly connected to an isolation plate (201) that fits against the inner wall of the extraction vessel (1), and the isolation plate (201) is evenly provided with a number of sedimentation ports (202); the stirring shaft (2) is slidably connected to a lifting frame (3), the lifting frame (3) is connected to a number of stirring rods (301), and a sealing plate (4) corresponding to the sedimentation ports (202) one by one; The stirring shaft (2) is connected to a lifting assembly, which is used to drive the lifting frame (3) to rise and fall through the lifting assembly, and to drive the sealing plate (4) to move through the lifting frame (3), and to use the sealing plate (4) to seal the sedimentation port (202), thereby isolating the upper and lower layers of liquid in the extraction vessel (1) and extracting the upper layer of liquid.

2. The extraction solvent recovery device for reducing the unit consumption of oxadiazon dichlorophenol as described in claim 1, characterized in that, The outer wall of the stirring shaft (2) is fixedly connected to a rotating plate (203), and the rotating plate (203) is rotatably connected to the extraction vessel (1).

3. The extraction solvent recovery device for reducing the unit consumption of oxadiazon dichlorophenol as described in claim 1 or 2, characterized in that, The stirring shaft (2) has a liquid extraction hole (204) facing downward from the upper end, and a liquid outlet (205) communicating with the liquid extraction hole (204) is provided on the side wall of the stirring shaft (2). The lower side of the liquid outlet (205) is not lower than the lower surface of the isolation plate (201), and is used to extract the solution above the isolation plate (201) through the liquid outlet (205) and the liquid extraction hole (204).

4. The extraction solvent recovery device for reducing the unit consumption of oxadiazon dichlorophenol as described in claim 2, characterized in that, The drive mechanism includes a mounting bracket (101) fixedly connected to the extraction vessel (1), the mounting bracket (101) being connected to a mounting base (102), and a worm gear (103) being rotatably connected to it. The mounting base (102) is fixedly connected to a motor (5), and the motor (5) is connected to the worm (103) via a transmission connection. The stirring shaft (2) is fixedly connected to a worm wheel (206) that meshes with the worm (103).

5. The extraction solvent recovery device for reducing the unit consumption of oxadiazon dichlorophenol as described in claim 4, characterized in that, The mounting base (102) is rotatably connected to a drive shaft (108), the drive shaft (108) is fixedly connected to a drive bevel gear (104) and a driven wheel (105), the output end of the motor (5) is fixedly connected to a drive wheel (501) that meshes with the driven wheel (105), and the shaft of the worm (103) is fixedly connected to a driven bevel gear (106) that meshes with the drive bevel gear (104).

6. The extraction solvent recovery device for reducing the unit consumption of oxadiazon dichlorophenol as described in claim 5, characterized in that, The mounting base (102) is slidably connected to the mounting bracket (101), and the mounting bracket (101) is fixedly connected to the telescopic device (502), and the telescopic end of the telescopic device (502) is connected to the mounting base (102); The drive shaft (108) is fixedly connected to the drive gear (107); the lifting assembly includes a rotating ring (207) and a rotating shaft (6) that are rotatably connected to the rotating plate (203); an outer gear ring (208) that meshes with the drive gear (107) is fixedly connected to the outer wall of the rotating ring (207), and an inner gear ring (209) is fixedly connected to the inner wall of the rotating ring (207); The upper end of the rotating shaft (6) is fixedly connected to a gear (601) that meshes with the internal gear ring (209), and the lower end of the rotating shaft (6) is fixedly connected to a lead screw (602). The lead screw (602) is threadedly connected to the lifting frame (3) and is used to drive the mounting base (102) to move through the telescopic device (502) to realize power switching. When the driving bevel gear (104) meshes with the driven bevel gear (106), the driving gear (107) separates from the external gear ring (208). When the driving gear (107) meshes with the external gear ring (208), the driving bevel gear (104) separates from the driven bevel gear (106).

7. The extraction solvent recovery device for reducing the unit consumption of oxadiazon dichlorophenol as described in claim 1 or 6, characterized in that, The isolation plate (201) is fixedly connected with a guide rod (401) that corresponds one-to-one with the sealing plate (4), and the guide rod (401) is movably interlocked with the lifting frame (3).

8. The extraction solvent recovery device for reducing the unit consumption of oxadiazon dichlorophenol as described in claim 7, characterized in that, The sealing plate (4) is fixedly connected to a support shaft (402), and the support shaft (402) is rotatably connected to the lifting frame (3). One end of the support shaft (402) is fixedly connected to a driven worm gear (403). The lifting frame (3) is rotatably connected to an active worm gear (404) that meshes with a driven worm wheel (403), and the shaft of the active worm gear (404) is fixedly connected to a traveling gear (405). The guide rod (401) is axially provided with a clearance groove (406), and a rack (407) that meshes with the traveling gear (405) is installed in the clearance groove (406). When the lifting frame (3) moves up and down, the traveling gear (405) meshes with the rack (407) to drive the sealing plate (4) to flip. When the lifting frame (3) moves towards the isolation plate (201), the sealing plate (4) gradually flips to a state parallel to the isolation plate (201).

9. The extraction solvent recovery device for reducing the unit consumption of oxadiazon dichlorophenol as described in claim 4 or 6, characterized in that, The stirring shaft (2) is rotatably connected to the mounting bracket (101).

10. The extraction solvent recovery device for reducing the unit consumption of oxadiazon dichlorophenol as described in claim 1, characterized in that, The sealing plate (4) is equipped with a sealing ring (408) on its periphery, which is used to achieve a seal between the sealing ring (408) and the inner wall of the sedimentation port (202).

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