Chemical DMF (Dimethyl Formamide) waste liquid deamination recovery device

Abstract

The invention relates to the technical field of chemical engineering, in particular to a chemical DMF waste liquid deamination recovery device which comprises a tank body, supporting legs are installed on the outer side of the tank body, a tank cover is installed at the upper end of the tank body, a rack is installed at the upper end of the tank cover, and a stirring mechanism is installed at the upper end of the rack. The lower end of the stirring mechanism penetrates through the tank cover and extends into an inner cavity of the tank body, a liquid conveying mechanism is installed at the upper end of the tank cover, a premixing mechanism and a mixing mechanism are installed in the inner cavity of the tank body, and the mixing mechanism is connected with the stirring mechanism; the stirring mechanism comprises a servo motor, a stirring shaft, an air blowing assembly, a first stirring assembly and a second stirring assembly, compared with the prior art, the device is novel in structural design and high in practicability, dimethylamine in wastewater can be fully stirred and mixed conveniently, the mixing reaction efficiency of the dimethylamine is improved, the deamination recovery effect is improved, and the device is suitable for popularization and application. And the use effect is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical engineering, and particularly relates to a device for recovering amines from DMF waste liquid in chemical engineering. Background Art

[0002] DMF, also known as dimethylformamide, is a toxic transparent liquid that can be miscible with water and most organic solvents. During some industrial production processes, a large amount of aqueous solution containing dimethylformamide will be generated, and usually, the dimethylformamide in it is recovered through a rectification column.

[0003] Since dimethylformamide will decompose into dimethylamine when heated, during the rectification process of dimethylformamide, part of the dimethylformamide will decompose into dimethylamine. Therefore, a large amount of overhead wastewater containing dimethylamine will be generated during the rectification and recovery process of dimethylformamide. The overhead wastewater containing dimethylamine is difficult to directly reuse or treat due to its malodor and biological toxicity. For this reason, we provide a device for recovering amines from DMF waste liquid in chemical engineering to solve this problem. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art, and a device for recovering amines from DMF waste liquid in chemical engineering is proposed to solve this problem.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: Design a device for recovering amines from DMF waste liquid in chemical engineering, including a tank body. Legs are installed on the outer side of the tank body, a tank cover is installed at the upper end of the tank body, a frame is installed at the upper end of the tank cover, a stirring mechanism is installed at the upper end of the frame, the lower end of the stirring mechanism penetrates through the tank cover and extends into the inner cavity of the tank body, an infusion mechanism is installed at the upper end of the tank cover, a premixing mechanism and a mixing mechanism are installed in the inner cavity of the tank body, and the mixing mechanism is connected to the stirring mechanism.

[0006] The stirring mechanism includes a servo motor, a stirring shaft, a blowing component, a first stirring component, and a second stirring component. The servo motor is installed at the upper end of the frame, the output end of the servo motor is installed with a stirring shaft, and the blowing component, the first stirring component, and the second stirring component are arranged on the outer side of the stirring shaft.

[0007] Furthermore, the blowing component includes a retaining ring, screw threads, a threaded sleeve, a support plate, a nozzle, and a positioning column. Two sections of screw threads are arranged on the outer side of the stirring shaft. Retaining rings corresponding to the two screw threads are installed on the upper and lower parts of the outer side of the screw threads. Two threaded sleeves corresponding to the screw threads are sleeved on the outer side of the stirring shaft. Support plates are equidistantly connected to the outer side of the threaded sleeve. Nozzles are equidistantly installed at the lower end of the support plate. A positioning column is installed at the bottom end of the inner cavity of the tank body, and the upper end of the positioning column penetrates through the two support plates and extends above them.

[0008] Furthermore, the first stirring assembly includes a connecting sleeve and stirring blades. Both of the connecting sleeves are installed on the outer side of the stirring shaft, and the stirring blades are equidistantly installed on the outer side of the connecting sleeve.

[0009] Furthermore, the second stirring assembly includes a stirring frame, a first vertical stirring rod, and a second vertical stirring rod. The stirring frame is installed at the lower part of the outer side of the stirring shaft. The first vertical stirring rods are equidistantly installed at the upper end of the stirring frame, and a number of second vertical stirring rods are installed at the lower end of the stirring frame.

[0010] Furthermore, the premixing mechanism includes a fixed cover, a stirring impeller, a fixed cylinder, and a spiral stirring blade. The fixed cover is installed in the inner cavity of the tank body. The bottom end of the inner cavity of the fixed cover is V-shaped, and a notch is provided at the bottom end of the inner cavity of the fixed cover. The stirring impeller is installed on the outer side of the stirring shaft, and the stirring impeller is located in the inner cavity of the notch. The fixed cylinder is installed at the lower end of the fixed cover, and the spiral stirring blade is installed on the outer side of the stirring shaft, and the spiral stirring blade is located in the inner cavity of the fixed cylinder.

[0011] Furthermore, the mixing mechanism includes a connecting frame, an external gear ring, a circular gear, a first support shaft, a second support shaft, a bearing seat, a sector gear, and a swing plate. The connecting frame is installed on the outer side of the stirring shaft. The external gear ring is installed on the outer side of the connecting frame. Two circular gears are meshed with the outer side of the external gear ring. Sector gears are meshed with the outer sides of the circular gears respectively. The first support shaft and the second support shaft are respectively installed in the inner cavities of the circular gear and the sector gear. The lower end of the fixed cover is rotatably connected to the first support shaft and the second support shaft through the bearing seat, and the lower end of the second support shaft is connected to the swing plate.

[0012] Furthermore, support seats are symmetrically connected to the inner cavity of the tank body. The second support shaft is rotatably sleeved with the support seat, and grooves are equidistantly arranged on the corresponding side of the swing plate.

[0013] Furthermore, the liquid infusion mechanism includes two liquid inlet pipes installed at the upper end of the tank cover, and regulating valves are installed on the outer sides of the liquid inlet pipes.

[0014] Furthermore, a drain pipe is installed at the lower end of the tank body, and a valve is installed on the outer side of the drain pipe.

[0015] A chemical DMF waste liquid deamination recovery device proposed by the present invention has the beneficial effects as follows: 1. When the stirring shaft rotates, it drives the stirring impeller and the spiral stirring blade to rotate. The stirring impeller rotates and disperses the overhead waste water and DMF degradation liquid flowing into the notch. Subsequently, when the spiral stirring blade rotates, the overhead waste water and DMF degradation liquid are initially mixed and stirred by hitting the inner wall of the fixed cylinder, and then are discharged by the rotation of the spiral stirring blade, which is convenient for discharging materials; 2. The stirring shaft drives the connecting sleeve and the stirring blades to rotate. At the same time, the stirring shaft drives the stirring frame and the first vertical stirring rod and the second vertical stirring rod at its upper and lower ends to rotate, which facilitates the horizontal and vertical stirring of the wastewater and DMF degradation liquid in the inner cavity of the tank body, avoiding stirring in the same direction for a long time, so that the wastewater and DMF degradation liquid enter the stirring cycle, affecting the activity between the solution molecules, and further reducing the effect of full contact reaction between them. At the same time, while the blowing component rotates with the stirring shaft, the threaded sleeve of the blowing component drives the support plate and the nozzle at its lower end to move up and down, and blows air while moving up and down through the nozzle. Further, when the wastewater and DMF degradation liquid in the inner cavity of the tank body are mixed and stirred, a phenomenon of upper and lower mixed liquid stratification occurs, resulting in incomplete mixing reaction and reducing the removal effect of dimethylamine; 3. Through the reciprocating swing of the swing plate of the mixing mechanism, and multiple grooves are designed on the outer side of the swing plate, which facilitates the flow of the mixed liquid, further increases the full mixing effect of the wastewater and DMF degradation liquid, effectively improves the degradation and removal effect of dimethylamine, and facilitates the discharge of the wastewater for subsequent recycling, purification and reuse. Brief Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of a chemical DMF waste liquid deamination recovery device proposed by the present invention; Figure 2 It is a schematic diagram of the overall three-dimensional semi-sectional structure of a chemical DMF waste liquid deamination recovery device proposed by the present invention; Figure 3 It is a schematic diagram of the partial three-dimensional semi-sectional structure of a chemical DMF waste liquid deamination recovery device proposed by the present invention; Figure 4 It is a schematic diagram of the partial three-dimensional structure of the stirring mechanism of a chemical DMF waste liquid deamination recovery device proposed by the present invention; Figure 5 It is a schematic diagram of the partial three-dimensional structure of the mixing mechanism of a chemical DMF waste liquid deamination recovery device proposed by the present invention; Figure 6 Proposed by the present invention Figure 5 The enlarged structural schematic diagram of part A of the device; Figure 7 It is a schematic diagram of the three-dimensional semi-sectional structure of the premixing mechanism of a chemical DMF waste liquid deamination recovery device proposed by the present invention.

[0017] In the figure: tank body 1, tank cover 2, frame 3, stirring mechanism 4, servo motor 41, stirring shaft 42, air blowing assembly 43, retaining ring 431, screw thread 432, threaded sleeve 434, support plate 435, air nozzle 436, positioning column 437, first stirring assembly 44, connecting sleeve 441, stirring blade 442, second stirring assembly 45, stirring frame 451, first vertical stirring rod 452, second vertical stirring rod 453, liquid infusion mechanism 5, regulating valve 51, liquid inlet pipe 52, drain pipe 6, valve 7, support leg 8, premixing mechanism 9, fixed cover 91, stirring impeller 92, fixed cylinder 93, spiral stirring blade 94, mixing mechanism 10, connecting frame 101, external gear ring 102, spur gear 103, first support shaft 104, second support shaft 105, bearing seat 106, support seat 107, sector gear 108, swing plate 109, groove 1010. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0019] Referring to Figure 1-7 , a chemical DMF waste liquid deamination recovery device includes a tank body 1. Support legs 8 are installed on the outer side of the tank body 1. A tank cover 2 is installed at the upper end of the tank body 1. A drain pipe 6 is installed at the lower end of the tank body 1. A valve 7 is installed on the outer side of the drain pipe 6, which is convenient to open the valve 7 and drain the liquid through the drain pipe 6. A liquid infusion mechanism 5 is installed at the upper end of the tank cover 2. The liquid infusion mechanism 5 includes two liquid inlet pipes 52 installed at the upper end of the tank cover 2. Regulating valves 51 are installed on the outer sides of the liquid inlet pipes 52 respectively. The import flow rates of the overhead wastewater containing dimethylamine and the DMF degradation liquid in the two liquid inlet pipes 52 are adjusted through the regulating valves 51, which is convenient for use.

[0020] A frame 3 is installed at the upper end of the can lid 2, and a stirring mechanism 4 is installed at the upper end of the frame 3. The lower end of the stirring mechanism 4 penetrates through the can lid 2 and extends into the inner cavity of the tank body 1. The stirring mechanism 4 includes a servo motor 41, a stirring shaft 42, a blowing component 43, a first stirring component 44 and a second stirring component 45. The servo motor 41 is installed at the upper end of the frame 3, and the output end of the servo motor 41 is installed with a stirring shaft 42. The outer side of the stirring shaft 42 is provided with a blowing component 43, a first stirring component 44 and a second stirring component 45. The blowing component 43 includes a retaining ring 431, a thread 432, a threaded sleeve 434, a support plate 435, a nozzle 436 and a positioning column 437. Two threads 432 are provided on the outer side of the stirring shaft 42. Two retaining rings 431 corresponding to the positions of the two threads 432 are installed on the upper and lower parts of the outer side of the thread 432. Two threaded sleeves 434 corresponding to the positions of the threads 432 are sleeved on the outer side of the stirring shaft 42. The outer side of the threaded sleeve 434 is equidistantly connected with support plates 435, and nozzles 436 are equidistantly installed at the lower ends of the support plates 435. The positioning column 437 is installed at the bottom end of the inner cavity of the tank body 1, and the upper end of the positioning column 437 penetrates through the two support plates 435 and extends above them. The first stirring component 44 includes a connecting sleeve 441 and stirring blades 442. The two connecting sleeves 441 are both installed on the outer side of the stirring shaft 42, and stirring blades 442 are equidistantly installed on the outer side of the connecting sleeve 441. The second stirring component 45 includes a stirring frame 451, a first vertical stirring rod 452 and a second vertical stirring rod 453. The stirring frame 451 is installed at the lower part of the outer side of the stirring shaft 42. The first vertical stirring rods 452 are equidistantly installed at the upper end of the stirring frame 451, and a number of second vertical stirring rods 453 are installed at the lower end of the stirring frame 451. By driving the stirring shaft 42 to rotate forward and backward through the output end of the servo motor 41, and the stirring shaft 42 drives the stirring blades 442 to rotate through the connecting sleeve 441. At the same time, the stirring shaft 42 drives the stirring frame 451 and the first vertical stirring rods 452 and the second vertical stirring rods 453 at its upper and lower ends to rotate, which is convenient for horizontally and vertically stirring the waste water and DMF degradation liquid in the inner cavity of the tank body 1, avoiding stirring in the same direction for a long time, so that the waste water and DMF degradation liquid enter the stirring cycle, affecting the activity between the solution molecules, and further reducing the effect of their full contact reaction. At the same time, when the threaded sleeves 434 at the two threads 432 on the outer side of the stirring shaft 42 are limited by the positioning column 437 inserted into the support plates 435, the threaded sleeves 434 drive the support plates 435 and the nozzles 436 at their lower ends to move up and down. And a plurality of nozzles 436 are connected to an external air pump through an air pipe, which is convenient for supplying air. While blowing air through the up and down movement of the nozzles 436, further, when the waste water and DMF degradation liquid in the inner cavity of the tank body 1 are mixed and stirred, a phenomenon of upper and lower liquid layer separation occurs, resulting in incomplete mixing reaction and reducing the removal effect of dimethylamine.

[0021] A premixing mechanism 9 is installed in the inner cavity of the tank body 1. The premixing mechanism 9 includes a fixed cover 91, a stirring impeller 92, a fixed cylinder 93 and a spiral stirring blade 94. The fixed cover 91 is installed in the inner cavity of the tank body 1. The bottom end of the inner cavity of the fixed cover 91 is V-shaped, and a notch is provided at the bottom end of the inner cavity of the fixed cover 91. The stirring impeller 92 is installed on the outside of the stirring shaft 42. The stirring impeller 92 is located in the inner cavity of the notch. The fixed cylinder 93 is installed at the lower end of the fixed cover 91. The spiral stirring blade 94 is installed on the outside of the stirring shaft 42. The spiral stirring blade 94 is located in the inner cavity of the fixed cylinder 93. When the tower top waste water and the DMF degradation liquid are respectively introduced into the fixed cover 91 from the two liquid inlet pipes 52, and the V-shaped inner cavity bottom end of the fixed cover 91 enables the liquid to be completely discharged from the notch, avoiding remaining in the fixed cover 91. At the same time, when the stirring shaft 42 rotates, it drives the stirring impeller 92 and the spiral stirring blade 94 to rotate. The stirring impeller 92 rotates and disperses the tower top waste water and the DMF degradation liquid flowing into the notch. Subsequently, when the spiral stirring blade 94 rotates, the tower top waste water and the DMF degradation liquid are initially mixed and stirred by hitting the inner wall of the fixed cylinder 93, and then are discharged when the spiral stirring blade 94 rotates, facilitating discharging.

[0022] A mixing mechanism 10 is installed in the inner cavity of the tank body 1. The mixing mechanism 10 is connected to the stirring mechanism 4. The mixing mechanism 10 includes a connecting frame 101, an external gear ring 102, a circular gear 103, a first support shaft 104, a second support shaft 105, a bearing seat 106, a sector gear 108 and a swing plate 109. The connecting frame 101 is installed on the outside of the stirring shaft 42, and the external gear ring 102 is installed on the outside of the connecting frame 101. Two circular gears 103 are meshed on the outside of the external gear ring 102. Sector gears 108 are meshed on the outside of the circular gears 103. The first support shaft 104 and the second support shaft 105 are respectively installed in the inner cavities of the circular gear 103 and the sector gear 108. The lower end of the fixed cover 91 is rotatably connected to the first support shaft 104 and the second support shaft 105 through the bearing seat 106. The lower end of the second support shaft 105 is connected to the swing plate 109. Support seats 107 are symmetrically connected to the inner cavity of the tank body 1. The second support shaft 105 is rotatably sleeved with the support seat 107. Grooves 1010 are equidistantly arranged on one side corresponding to the swing plate 109. While the stirring shaft 42 rotates, the stirring shaft 42 drives the connecting frame 101 and the external gear ring 102 outside it to rotate. The external gear ring 102 drives the circular gears 103 meshed with it to rotate, and the circular gears 103 drive the sector gears 108 to rotate. The sector gears 108 drive the second support shaft 105 in their inner cavities. Under the stable support of the bearing seat 106 and the support seat 107, the second support shaft 105 stably drives the swing plate 109. Since the output end of the servo motor 41 drives the stirring shaft 42 to rotate forward and backward, the stirring shaft 42 drives the external gear ring 102 to rotate forward and backward through the connecting frame 101. Then the external gear ring 102 drives the sector gear 108 to rotate forward and backward through the circular gear 103, and the sector gear 108 drives the swing plate 109 to swing reciprocally. Multiple grooves 1010 are designed on the outside of the swing plate 109, which is convenient for the flow of the mixed liquid, further increasing the full mixing effect of the wastewater and the DMF degradation liquid, effectively improving the degradation and removal effect of dimethylamine, and facilitating the discharge of the wastewater for subsequent recycling, purification and reuse.

[0023] Working principle: The present invention is controlled and linked with a servo motor 41 and an external air pump through an external controller. During use, the overhead waste water containing dimethylamine and the DMF degradation liquid are introduced into the inner cavity of the tank body 1 through two liquid inlet pipes 52, and first flow into the fixed cover 91. By turning on the switch of the servo motor 41, the output end of the servo motor 41 drives the stirring shaft 42 to rotate forward and backward. The V-shaped inner cavity bottom end of the fixed cover 91 enables all the liquid to be discharged from the notch, avoiding remaining in the fixed cover 91. At this time, when the stirring shaft 42 rotates, it drives the stirring impeller 92 and the spiral stirring blade 94 to rotate. The stirring impeller 92 rotates and disperses the overhead waste water and the DMF degradation liquid flowing into the notch. Subsequently, when the spiral stirring blade 94 rotates, the overhead waste water and the DMF degradation liquid collide with the inner wall of the fixed cylinder 93, causing them to be preliminarily mixed and stirred, and then discharged through the rotation of the spiral stirring blade 94, facilitating discharging. The stirring shaft 42 drives the stirring blade 442 to rotate through the connecting sleeve 441. At the same time, the stirring shaft 42 drives the stirring frame 451 and the first vertical stirring rod 452 and the second vertical stirring rod 453 at its upper and lower ends to rotate, facilitating the horizontal and vertical stirring of the waste water and the DMF degradation liquid in the inner cavity of the tank body 1, avoiding long-term stirring in the same direction, which may cause the waste water and the DMF degradation liquid to enter the stirring cycle, affecting the activity between their solution molecules, and thus reducing the effect of their full contact reaction. At the same time, when the support plate 435 is inserted and limited by the positioning column 437 at the two screw threads 432 on the outer side of the stirring shaft 42, the threaded sleeve 434 drives the support plate 435 and the air nozzle 436 at its lower end to move up and down. Multiple air nozzles 436 are connected to an external air pump through an air pipe, facilitating air supply. While the air nozzles 436 move up and down and blow air, it further causes the waste water and the DMF degradation liquid in the inner cavity of the tank body 1 to have a phenomenon of upper and lower mixed liquid stratification during mixing and stirring, resulting in incomplete mixing reaction and reducing the removal effect of dimethylamine. At the same time, the stirring shaft 42 drives the connecting frame 101 and the external gear ring 102 on its outer side to rotate, and the external gear ring 102 drives the meshing circular gear 103 to rotate, and the circular gear 103 drives the sector gear 108 to rotate. The sector gear 108 drives the second support shaft 105 in its inner cavity. The second support shaft 105, under the stable support of the bearing seat 106 and the support seat 107, stably drives the swing plate 109 to perform. Since the output end of the servo motor 41 drives the stirring shaft 42 to rotate forward and backward, the stirring shaft 42 drives the external gear ring 102 to rotate forward and backward through the connecting frame 101. Then, the external gear ring 102 drives the sector gear 108 to rotate forward and backward through the circular gear 103, and the sector gear 108 drives the swing plate 109 to perform reciprocating swing. Multiple grooves 1010 are designed on the outer side of the swing plate 109, facilitating the flow of the mixed liquid, further increasing the full mixing effect of the waste water and the DMF degradation liquid, effectively improving the degradation and removal effect of dimethylamine, and facilitating the discharge of the waste water for subsequent recovery, purification and reuse.

[0024] As described above, it is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. A chemical DMF waste liquid deamination recovery device, comprising a tank body (1), characterized in that, The outer side of the tank body (1) is provided with supporting legs (8), the upper end of the tank body (1) is provided with a tank cover (2), the upper end of the tank cover (2) is provided with a frame (3), the upper end of the frame (3) is provided with a stirring mechanism (4), the lower end of the stirring mechanism (4) penetrates through the tank cover (2) and extends into the inner cavity of the tank body (1), the upper end of the tank cover (2) is provided with an infusion mechanism (5), the inner cavity of the tank body (1) is provided with a premixing mechanism (9) and a mixing mechanism (10), and the mixing mechanism (10) is connected with the stirring mechanism (4). The stirring mechanism (4) includes a servo motor (41), a stirring shaft (42), a blowing component (43), a first stirring component (44) and a second stirring component (45). The servo motor (41) is installed at the upper end of the frame (3), the output end of the servo motor (41) is provided with a stirring shaft (42), and the blowing component (43), the first stirring component (44) and the second stirring component (45) are arranged on the outer side of the stirring shaft (42).

2. The chemical DMF waste liquid deamination recovery device according to claim 1, characterized in that, The blowing component (43) includes a retaining ring (431), screw threads (432), a threaded sleeve (434), a support plate (435), a nozzle (436) and a positioning column (437). Two sections of screw threads (432) are arranged on the outer side of the stirring shaft (42), retaining rings (431) corresponding to the two screw threads (432) are installed on the upper and lower parts of the outer side of the screw threads (432), two threaded sleeves (434) corresponding to the screw threads (432) are sleeved on the outer side of the stirring shaft (42), support plates (435) are equidistantly connected to the outer side of the threaded sleeve (434), nozzles (436) are equidistantly installed at the lower end of the support plate (435), a positioning column (437) is installed at the bottom end of the inner cavity of the tank body (1), and the upper end of the positioning column (437) penetrates through the two support plates (435) and extends above them.

3. The chemical DMF waste liquid deamination recovery device according to claim 2, characterized in that, The first stirring component (44) includes a connecting sleeve (441) and stirring blades (442). The two connecting sleeves (441) are both installed on the outer side of the stirring shaft (42), and stirring blades (442) are equidistantly installed on the outer side of the connecting sleeve (441).

4. A chemical DMF waste liquid deamination recovery device according to claim 3, characterized in that, The second stirring component (45) includes a stirring frame (451), a first vertical stirring rod (452) and a second vertical stirring rod (453). The stirring frame (451) is installed at the lower part of the outer side of the stirring shaft (42), the first vertical stirring rods (452) are equidistantly installed at the upper end of the stirring frame (451), and a plurality of second vertical stirring rods (453) are installed at the lower end of the stirring frame (451).

5. A chemical DMF waste liquid deamination recovery device according to claim 1, characterized in that, The premixing mechanism (9) includes a fixed cover (91), a stirring impeller (92), a fixed cylinder (93), and a spiral stirring blade (94). The fixed cover (91) is installed in the inner cavity of the tank body (1). The bottom end of the inner cavity of the fixed cover (91) is V-shaped, and a notch is provided at the bottom end of the inner cavity of the fixed cover (91). The stirring impeller (92) is installed on the outer side of the stirring shaft (42), and the stirring impeller (92) is located in the inner cavity of the notch. The fixed cylinder (93) is installed at the lower end of the fixed cover (91), and the spiral stirring blade (94) is installed on the outer side of the stirring shaft (42), and the spiral stirring blade (94) is located in the inner cavity of the fixed cylinder (93).

6. The chemical DMF waste liquid deamination recovery device according to claim 5, characterized in that, The mixing mechanism (10) includes a connecting frame (101), an external gear ring (102), a circular gear (103), a first support shaft (104), a second support shaft (105), a bearing seat (106), a sector gear (108), and a swing plate (109). The connecting frame (101) is installed on the outer side of the stirring shaft (42), the external gear ring (102) is installed on the outer side of the connecting frame (101), two circular gears (103) are meshed with the outer side of the external gear ring (102), sector gears (108) are meshed with the outer sides of the circular gears (103), the first support shaft (104) and the second support shaft (105) are respectively installed in the inner cavities of the circular gear (103) and the sector gear (108). The lower end of the fixed cover (91) is rotatably connected to the first support shaft (104) and the second support shaft (105) through the bearing seat (106), and the lower end of the second support shaft (105) is connected to the swing plate (109).

7. A chemical DMF waste liquid deamination recovery device according to claim 6, characterized in that, Support seats (107) are symmetrically connected to the inner cavity of the tank body (1), and the second support shaft (105) is rotatably sleeved with the support seat (107). Grooves (1010) are equidistantly arranged on one side corresponding to the swing plate (109).

8. A chemical DMF waste liquid deamination recovery device according to claim 1, characterized in that, The liquid infusion mechanism (5) includes two liquid inlet pipes (52) installed on the upper end of the tank cover (2), and regulating valves (51) are installed on the outer sides of the liquid inlet pipes (52).

9. The chemical DMF waste liquid deamination recovery device according to claim 1, characterized in that, A liquid discharge pipe (6) is installed at the lower end of the tank body (1), and a valve (7) is installed on the outer side of the liquid discharge pipe (6).

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