A solvent refining and recovery system for meta-aramid fiber production

Abstract

The present invention discloses a solvent refining and recovery treatment system for meta-aramid fiber production, which relates to the technical field of meta-aramid fiber production, and includes an extraction tank and a pressure tank. The pressure tank includes a tank body, a liquid inlet pipe is fixed on one side of the tank body, the bottom end of the tank body extends to the interior of the extraction tank, an extractant addition port is provided at the top of the extraction tank, a discharge port is provided at the bottom of the extraction tank, a motor is fixedly installed on one side of the extractant addition port at the top of the extraction tank, and the output end of the motor extends into the extraction tank and is fixed with an agitator. The present invention utilizes a clever combination of a piston, a force storage spring and a transmission mechanism to achieve automatic pressurization and discharge of wastewater inside the pressure tank. As the wastewater is pumped in, the piston is pushed and compresses the force storage spring. When the force storage reaches the maximum value, the spring releases energy to push the piston to move in the opposite direction, thereby completing the pressurized discharge of the wastewater. This process does not require manual intervention, and automatic operation is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of meta-aramid fiber production, and in particular to a solvent refining and recovery processing system for meta-aramid fiber production. Background Art

[0002] N,N-dimethylacetamide (DMAC) is used as a chemical raw material and organic good solvent, and is widely used in the petroleum, chemical, pharmaceutical and other industries. At present, most of the ultrafiltration and microfiltration hollow fiber membrane production adopts the liquid phase separation membrane production process, and uses DMAC as a solvent. In the later stage of membrane production, the concentration of discharged DMAC does not meet the recovery standard, which not only causes a waste of raw materials, but also causes great pollution to the environment. In addition, the effluent also contains a large amount of DMAC components, which results in a large amount of ineffective loss and increases the manufacturing cost.

[0003] In the prior art, DMAC is mainly recovered by extraction and distillation. Before extraction, the wastewater needs to be fully mixed with the extractant. In the prior art, the wastewater is directly introduced into the extraction tank and then mixed by stirring. There is no pre-mixing step, and a longer time is required for subsequent stirring, thereby reducing the extraction efficiency. Summary of the invention

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A solvent refining and recovery processing system for meta-aramid fiber production comprises an extraction tank and a pressure tank, wherein the pressure tank comprises a tank body, a liquid inlet pipe is fixed to one side of the tank body, the bottom end of the tank body extends to the interior of the extraction tank, an extractant addition port is provided at the top end of the extraction tank, a discharge port is provided at the bottom end of the extraction tank, a motor is fixedly installed at one side of the extractant addition port at the top end of the extraction tank, and an output end of the motor extends into the extraction tank and is fixed with a stirrer.

[0006] Preferably, a drain port is provided at the bottom end of the tank body, and an opener is provided at the bottom end of the tank body outside the drain port, and a drain distribution pipe is fixed to a side of the opener away from the tank body.

[0007] Preferably, a piston is slidably mounted inside the tank body, two guide rods are fixed to the side of the piston away from the shutter, one end of the guide rod away from the piston movably extends to the outside of the tank body, and a force storage spring is mounted outside the guide rod.

[0008] Preferably, a transmission column is fixed at the center position of one side of the piston away from the shutter, one end of the transmission column away from the piston extends to the outside of the tank body, and a guide groove is opened on the outside of the transmission column, and the guide groove extends along the spiral.

[0009] Preferably, a sleeve is rotatably mounted on the outer wall of the tank body, the sleeve is located outside the transmission column, a first gear is fixed outside the sleeve, a slide rod is fixed inside the sleeve, and the slide rod extends into the guide slot.

[0010] Preferably, a transmission shaft is fixed on the outside of the tank body, a second gear is fixed to one end of the transmission shaft close to the first gear, a third gear is rotatably installed on the outside of the tank body between the first gear and the second gear, and the first gear and the second gear are respectively engaged with the third gear from both sides of the third gear.

[0011] Preferably, two reciprocating screw rods are rotatably installed inside the opener, and a sealing plug is also provided inside the opener, on which two threaded sleeves are fixed, and the two threaded sleeves are respectively threadedly installed on the outside of the two reciprocating screw rods, one end of the threaded sleeve extends to the outside of the opener and is fixed with a fourth gear, and a double-sided gear ring is rotatably installed on the side of the opener away from the tank body, and the fourth gear is engaged with the inner ring of the double-sided gear ring.

[0012] Preferably, a fifth gear and a sixth gear are rotatably mounted on the side walls of the shutter, the rotating shaft of the fifth gear is connected to the transmission shaft through a one-way transmission, the sixth gear is located between the fifth gear and the double-sided gear ring, and the fifth gear and the double-sided gear ring are both meshed with the sixth gear.

[0013] Preferably, a hydraulic sensor is installed on the outside of the switch, a plurality of branch pipes are connected to the liquid discharge distribution pipe, and a spray head is installed on the branch pipe.

[0014] Preferably, the distances between the connection parts of the multiple branch pipes and the drainage distribution pipe and the shutter are different and are equidistantly distributed in sequence. A cylinder is fixed to the side of the drainage distribution pipe away from the shutter, and the output shaft of the cylinder extends into the interior of the drainage distribution pipe and is fixed with a baffle.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Improve extraction efficiency: Through the design of the pressurized tank, the recovered wastewater is pressurized and directly sprayed into the extraction solvent, which realizes the pre-mixing of the wastewater, reduces the time of subsequent stirring and mixing, and significantly improves the extraction efficiency.

[0017] 2. The automatic pressurization and discharge of wastewater inside the pressure tank is achieved by the ingenious combination of piston, force storage spring and transmission mechanism. As the wastewater is pumped in, the piston is pushed and compresses the force storage spring. When the force storage reaches the maximum value, the spring releases energy to push the piston to move in the opposite direction, completing the pressurized discharge of wastewater. This process does not require manual intervention and realizes automatic operation.

[0018] 3. Intelligent control of the drain port: Through the cooperation of the transmission shaft, gear set and one-way transmission, the intelligent control of the drain port opener and closeer is realized. When the piston moves to the left, the sealing plug is driven horizontally by the transmission mechanism to block the drain port; when the piston moves to the leftmost end and starts to move in the opposite direction, the sealing plug automatically opens to allow the pressurized wastewater to spray out. This design ensures that the wastewater is pressurized and sprayed out at the best time, further improving the mixing effect.

[0019] 4. Intelligent adjustment of injection pressure: The introduction of hydraulic sensors enables the system to monitor the pressure of wastewater in the pressurized tank in real time. When the water pressure is detected to be low, the system can automatically adjust the on-off status of the drainage distribution pipe, drive the baffle to move through the cylinder, and close some branch pipes to ensure that the water pressure sprayed from the remaining branch pipes remains within the appropriate range, thereby ensuring the mixing effect of wastewater and extraction solvent. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A perspective view of the present invention;

[0022] Figure 2 is a cross-sectional view of an extraction tank of the present invention;

[0023] Figure 3 It is a three-dimensional diagram of the pressurized tank of the present invention;

[0024] Figure 4 It is a front view of the pressurized tank of the present invention;

[0025] Figure 5 A cross-sectional view of a pressurized tank according to the present invention from a first perspective;

[0026] Figure 6 for Figure 5 A zoomed-in detail of position A in the middle;

[0027] Figure 7 A cross-sectional view of the pressurized tank of the present invention from a second viewing angle;

[0028] Figure 8 for Figure 7 A magnified detail of the first state of the middle B position;

[0029] Fig. 9 for Figure 7 A magnified detail of the second state of the middle B position;

[0030] Fig.10 A cross-sectional view of the pressurized tank of the present invention from a third viewing angle;

[0031] Fig.11 for Fig.10 Enlarged detail image of the middle C position;

[0032] Fig.12 It is an enlarged cross-sectional view of the liquid discharge distribution pipe of the present invention;

[0033] In the figure: 1 extraction tank, 101 extraction agent addition port, 102 discharge port, 103 motor, 104 stirrer, 2 pressurized tank, 201 tank body, 2011 liquid inlet pipe, 202 shutter, 2021 hydraulic sensor, 203 liquid discharge distribution pipe, 2031 branch pipe, 2032 cylinder, 2033 baffle, 2034 injection head, 204 piston, 205 transmission column, 2051 guide slide groove, 206 guide rod, 2061 storage spring, 207 sleeve, 2071 first gear, 2072 slide rod, 3 third gear, 301 transmission shaft, 302 second gear, 303 one-way transmission device, 304 fifth gear, 305 sixth gear, 4 reciprocating screw rod, 401 sealing plug, 402 threaded sleeve, 403 fourth gear, 404 double-sided gear ring. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0035] Reference Figure 1-12 A solvent refining and recovery treatment system for meta-aramid fiber production includes an extraction tank 1 and a pressure tank 2, the pressure tank 2 includes a tank body 201, a liquid inlet pipe 2011 is fixed to one side of the tank body 201, the bottom end of the tank body 201 extends to the inside of the extraction tank 1, the top of the extraction tank 1 is provided with an extractant addition port 101, the bottom end of the extraction tank 1 is provided with a discharge port 102, the top of the extraction tank 1 is located on one side of the extractant addition port 101 and a motor 103 is fixedly installed, the output end of the motor 103 extends into the extraction tank 1 and is fixed with a stirrer 104;

[0036] The extraction solvent is introduced into the extraction tank 1 through the extraction agent addition port 101, and the recovered waste water is introduced into the pressure tank 2 through the liquid inlet pipe 2011. After being pressurized by the pressure tank 2, it is sprayed toward the extraction solvent, thereby achieving the purpose of pre-mixing while introducing the waste water, thereby reducing the time for subsequent stirring and mixing and improving the extraction efficiency. Example 2

[0037] Reference Figure 1-12 The difference between this embodiment and embodiment 1 is that a liquid discharge port is provided at the bottom end of the tank body 201, and an opener 202 is provided outside the liquid discharge port at the bottom end of the tank body 201, a liquid discharge distribution pipe 203 is fixed on the side of the opener 202 away from the tank body 201, a piston 204 is slidably mounted inside the tank body 201, two guide rods 206 are fixed on the side of the piston 204 away from the closet 202, one end of the guide rod 206 away from the piston 204 movably extends to the outside of the tank body 201, and a force storage spring 2061 is installed outside the guide rod 206;

[0038] When liquid is pumped into the pressurized tank 2 through the liquid inlet pipe 2011, the liquid pressure increases due to the increase of liquid inside the tank body 201, the piston 204 is pushed, and the storage spring 2061 is compressed;

[0039] During the process of the piston 204 being pushed, the shutter 202 is closed. When the force storage spring 2061 is compressed to the maximum value, the shutter 202 is opened. Due to the elastic force of the force storage spring 2061, the piston 204 is pushed back, and the wastewater is pressurized, so that the wastewater is accelerated to be ejected from the drainage distribution pipe 203, thereby achieving the purpose of pressurizing the wastewater. Example 3

[0040] Reference Figure 1-12 The difference between this embodiment and the second embodiment is that a transmission column 205 is fixed at the center of the side of the piston 204 away from the closer 202, and the end of the transmission column 205 away from the piston 204 extends to the outside of the tank 201, and a guide groove 2051 is opened on the outside of the transmission column 205, and the guide groove 2051 extends along the spiral line;

[0041] During the process of the piston 204 being pushed, the transmission column 205 moves along with it, and a sleeve 207 is rotatably installed on the outer wall of the tank body 201. The sleeve 207 is located outside the transmission column 205. A first gear 2071 is fixed to the outside of the sleeve 207. A slide rod 2072 is fixed to the inside of the sleeve 207. The slide rod 2072 extends into the guide groove 2051. During the movement of the transmission column 205 inside the sleeve 207, the sleeve 207 is driven to rotate due to the limiting effect of the guide groove 2051 on the slide rod 2072.

[0042] A transmission shaft 301 is fixed on the outside of the tank body 201, a second gear 302 is fixed on one end of the transmission shaft 301 close to the first gear 2071, a third gear 3 is rotatably mounted on the outside of the tank body 201 between the first gear 2071 and the second gear 302, and the first gear 2071 and the second gear 302 are respectively meshed with the third gear 3 from both sides of the third gear 3;

[0043] When the sleeve 207 rotates, the transmission shaft 301 can be driven to rotate through the meshing transmission among the first gear 2071, the second gear 302 and the third gear 3.

[0044] Among them, two reciprocating screw rods 4 are rotatably installed inside the opener 202, and a sealing plug 401 is also provided inside the opener 202. Two threaded sleeves 402 are fixed on the sealing plug 401. The two threaded sleeves 402 are respectively threadedly installed on the outside of the two reciprocating screw rods 4. One end of the threaded sleeve 402 extends to the outside of the opener 202 and is fixed with a fourth gear 403. A double-sided gear ring 404 is rotatably installed on the side of the opener 202 away from the tank body 201. The fourth gear 403 is meshed with the inner ring of the double-sided gear ring 404. When the double-sided gear ring 404 rotates, it can drive the fourth gear 403 to rotate, thereby driving the two reciprocating screw rods 4 to move horizontally, thereby driving the sealing plug 401 to move horizontally.

[0045] The fifth gear 304 and the sixth gear 305 are rotatably mounted on the side walls of the shutter 202, respectively. The rotating shaft of the fifth gear 304 is connected to the transmission shaft 301 through a one-way transmission device 303. The sixth gear 305 is located between the fifth gear 304 and the double-sided gear ring 404, and the fifth gear 304 and the double-sided gear ring 404 are both meshed with the sixth gear 305. When the transmission shaft 301 rotates, it will drive the fifth gear 304 to rotate in one direction, and then drive the sealing plug 401 to move horizontally through the meshing of the fifth gear 304, the double-sided gear ring 404 and the sixth gear 305. The one-way transmission device 303 adopts a ratchet wheel and ratchet teeth to achieve a one-way transmission effect. Only when the piston 204 moves to the left (refer to Figure 7 ), will drive the sealing plug 401 to move horizontally, and by adjusting the transmission ratio, it is ensured that during the movement of the piston 204 to the left, the sealing plug 401 moves back and forth exactly once. The moving range of the sealing plug 401 is as follows: Figure 8 and Fig. 9 There are two states. When the liquid is pumped into the tank 201, the initial state of the sealing plug 401 is Figure 8 At this time, as the amount of liquid increases, the sealing plug 401 moves to the left to directly block the discharge port to the tank body 201, and continues to move to the left to move to Fig. 9 When the piston 204 moves to the left, the sealing plug 401 moves back to the Figure 8State, at this time, since the sealing plug 401 is separated from the discharge port to the tank body 201, the liquid will be pressurized and sprayed out, and due to the existence of the one-way transmission device 303, the sealing plug 401 remains stationary during the process of the piston 204 moving to the right to discharge water. After the liquid is sprayed, a cycle is completed. It is only necessary to intermittently replenish the liquid in the tank body 201 to automatically accumulate power and spray the liquid out under the maximum accumulated power state, thereby improving the mixing effect. Example 4

[0046] Reference Figure 1-12 The difference between this embodiment and embodiment 2 is that a hydraulic sensor 2021 is installed outside the switch 202, a plurality of branch pipes 2031 are connected to the drainage distribution pipe 203, and a spray head 2034 is installed on the branch pipe 2031.

[0047] The distances between the connection parts of the plurality of branch pipes 2031 and the drain distribution pipe 203 and the shutter 202 are different and are equidistantly distributed in sequence. A cylinder 2032 is fixed on one side of the drain distribution pipe 203 away from the shutter 202. The output shaft of the cylinder 2032 extends into the drain distribution pipe 203 and is fixed with a baffle 2033.

[0048] The cylinder 2032 can drive the baffle 2033 to move, thereby changing the on-off status of the branch pipe 2031. When the hydraulic sensor 2021 detects that the water pressure is low, some branch pipes 2031 can be closed so that the water pressure sprayed from the remaining branch pipes 2031 will not be too low, thereby ensuring the mixing effect.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A solvent refining and recovery system for meta-aramid fiber production, comprising an extraction tank (1) and a pressure tank (2), characterized in that: The pressurized tank (2) comprises a tank body (201), a liquid inlet pipe (2011) is fixed to one side of the tank body (201), the bottom end of the tank body (201) extends to the interior of the extraction tank (1), the top end of the extraction tank (1) is provided with an extractant addition port (101), the bottom end of the extraction tank (1) is provided with a discharge port (102), a motor (103) is fixedly mounted at the top end of the extraction tank (1) and located on one side of the extractant addition port (101), and the output end of the motor (103) extends into the extraction tank (1) and is fixed with a stirrer (104); The bottom end of the tank body (201) is provided with a liquid discharge port, and the bottom end of the tank body (201) is provided with an opener (202) outside the liquid discharge port; A piston (204) is slidably mounted inside the tank body (201), two guide rods (206) are fixed to a side of the piston (204) away from the shutter (202), one end of the guide rod (206) away from the piston (204) movably extends to the outside of the tank body (201), and a force storage spring (2061) is mounted outside the guide rod (206); A transmission column (205) is fixed at the center of one side of the piston (204) away from the shutter (202), one end of the transmission column (205) away from the piston (204) extends to the outside of the tank body (201), and a guide groove (2051) is provided on the outside of the transmission column (205), and the guide groove (2051) extends along the spiral line; A sleeve (207) is rotatably mounted on the outer wall of the tank body (201), the sleeve (207) is located outside the transmission column (205), a first gear (2071) is fixed outside the sleeve (207), a slide rod (2072) is fixed inside the sleeve (207), and the slide rod (2072) extends into the guide slide groove (2051); A transmission shaft (301) is fixed on the outside of the tank body (201); a second gear (302) is fixed on one end of the transmission shaft (301) close to the first gear (2071); a third gear (3) is rotatably mounted on the outside of the tank body (201) between the first gear (2071) and the second gear (302); the first gear (2071) and the second gear (302) are respectively meshed with the third gear (3) from both sides of the third gear (3); Two reciprocating screw rods (4) are rotatably mounted inside the shutter (202), a sealing plug (401) is also provided inside the shutter (202), two threaded sleeves (402) are fixed on the sealing plug (401), the two threaded sleeves (402) are respectively threadedly mounted on the outside of the two reciprocating screw rods (4), one end of the threaded sleeve (402) extends to the outside of the shutter (202) and is fixed with a fourth gear (403), a double-sided gear ring (404) is rotatably mounted on the side of the shutter (202) away from the tank body (201), and the fourth gear (403) is meshed with the inner ring of the double-sided gear ring (404); A fifth gear (304) and a sixth gear (305) are rotatably mounted on the side walls of the shutter (202), the rotating shaft of the fifth gear (304) is connected to the transmission shaft (301) via a one-way transmission (303), the sixth gear (305) is located between the fifth gear (304) and the double-sided gear ring (404), and both the fifth gear (304) and the double-sided gear ring (404) are meshed with the sixth gear (305), and only when the piston (204) moves to the left will the sealing plug (401) be driven to move horizontally, and by adjusting the transmission ratio, it is ensured that during the process of the piston (204) moving to the left, the sealing plug (401) moves back and forth exactly once. When liquid is pumped into the tank body (201), as the amount of liquid increases, the sealing plug (401) moves to the left to directly block the liquid discharge port of the tank body (201), and continues to move to the left. When the piston (204) moves to the leftmost end, the sealing plug (401) is separated from the liquid discharge port of the tank body (201), and the liquid is sprayed out under pressure. Due to the presence of the one-way transmission device (303), the sealing plug (401) remains stationary during the process of the piston (204) moving to the right to discharge water. After the liquid is discharged, a cycle is completed. It is only necessary to intermittently add liquid to the tank body (201) to automatically accumulate force, and spray the liquid out in the maximum accumulated force state, thereby improving the mixing effect. A liquid discharge distribution pipe (203) is fixed on a side of the shutter (202) away from the tank body (201); A hydraulic sensor (2021) is installed outside the shutter (202); a plurality of branch pipes (2031) are connected to the liquid discharge distribution pipe (203); and a spray head (2034) is installed on the branch pipe (2031); The distances between the connection parts of the plurality of branch pipes (2031) and the liquid discharge distribution pipe (203) and the shutter (202) are different and are equidistantly distributed in sequence. A cylinder (2032) is fixed to the side of the liquid discharge distribution pipe (203) away from the shutter (202). The output shaft of the cylinder (2032) extends into the interior of the liquid discharge distribution pipe (203) and is fixed to a baffle (2033).

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