Polymerizing kettle for reversed-phase suspension synthesis of super absorbent resin
By using a paddle-type framed combined stirrer and hollow stirrer spindle in the polymerization kettle for synthesizing highly water-absorbing resin in reverse phase suspension, the problems of uneven stirring and insufficient shear force in the prior art are solved, and more uniform stirring and higher reaction rates are achieved.
Patent Information
- Application Number
- CN202421660318.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-07-12
AI Technical Summary
In the process of reverse phase suspension synthesis of highly water-absorbing resins, existing reactor stirrers have problems such as uneven stirring and insufficient shear force, resulting in the polymerization and blockage of the bottom discharge port and low reaction efficiency.
A polymerization kettle for reverse phase suspension synthesis of highly absorbent resin is designed. The agitator adopts a paddle-type framed combination, which has strong shear force, and nitrogen is added through the hollow agitator spindle and exhaust hole to prevent oxygen from hindering the radical reaction. At the same time, the guide line is designed on the kettle wall to ensure the centripetal movement of the stirring liquid.
The stirring is achieved more uniformly, the reaction rate is enhanced, and the raw materials are avoided due to uneven stirring, which improves the use efficiency and production quality of the reactor.
Smart Images
Figure CN222766337U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of polymerization kettles, in particular to a polymerization kettle used for reverse phase suspension synthesis of highly absorbent resin. Background Art
[0002] Reactors are used in the processing of chemical composite materials (super absorbent resin). Unlike other medical fields or other related chemical fields, the structure of the reactor used therein is often different from that used in other fields. Existing reactor agitators include anchor type, paddle type and frame type. The commonly used frame type agitator has a low stirring speed and cannot have a large shear force on the suspension. The paddle type agitator has a strong shear force. The material at the bottom of the reactor may not be stirred properly in part, resulting in uneven stirring, causing polymerization blockage at the bottom discharge port, etc. The function is relatively simple and there are many defects. In addition, the existing reactor has poor stirring performance, low reaction efficiency and is inconvenient to use. Especially in the production of inverse suspension synthesis of super absorbent resin, the defects of the stirring equipment seriously affect the production efficiency and production quality. Therefore, a polymerization reactor for inverse suspension synthesis of super absorbent resin is provided. Utility Model Content
[0003] The purpose of the utility model is to provide a polymerization kettle for inverse suspension synthesis of highly absorbent resin in view of the defects of the prior art, so as to solve the problems raised by the above-mentioned background technology.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a polymerization kettle for inverse suspension synthesis of super absorbent resin, comprising a polymerization kettle, a fixing frame is provided on the top of the polymerization kettle, a second bearing is installed on the fixing frame, a nitrogen inlet pipe is connected to the top of the second bearing, a stirrer main shaft is connected to the bottom of the second bearing, the stirrer main shaft is installed on the top of the polymerization kettle through a first bearing, the stirrer main shaft is a hollow structure, a plurality of exhaust holes are evenly arranged on the stirrer main shaft, a frame-type stirring blade and a double-paddle blade are installed at the bottom of the stirrer main shaft, and a guide line is provided on the inner wall of the polymerization kettle.
[0005] As a preferred technical solution of the utility model, a feed line is connected to the bottom of the polymerization kettle.
[0006] As a preferred technical solution of the utility model, the main shaft of the stirrer is welded to the inner ring of the first bearing, and a second gear is welded to the main shaft of the stirrer.
[0007] As a preferred technical solution of the utility model, the second gear is meshed and connected with the first gear, the first gear is welded on the rotating shaft, the rotating shaft is installed on the reduction box, and the driving motor is installed on the top of the reduction box.
[0008] As a preferred technical solution of the present utility model, the second bearing is a sealed bearing, and the agitator main shaft is sealed and connected to the nitrogen inlet pipe through the sealed bearing.
[0009] As a preferred technical solution of the utility model, the frame-type stirring blades and the double-paddle blades are both welded to the main shaft of the stirrer.
[0010] As a preferred technical solution of the utility model, the frame-type stirring blade has a multi-layer grille, and the frame-type stirring blade and the double-paddle blade form a composite grille-shaped structure.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] The agitator of the polymerization kettle is a paddle-and-frame combination, which has a strong shear force and solves the problem of uneven mixing at the bottom. The paddle-and-frame combination constitutes a composite grid-shaped structure, which can not only achieve three-dimensional stirring, but also break up the agglomerates through the grid, avoiding the generation of particles due to uneven stirring of the raw materials, making the reactor more evenly stirred during production, which helps to increase the reaction rate.
[0013] The main shaft of the agitator is a hollow shaft, and multiple sets of exhaust holes are designed on the main shaft. The main function is to add nitrogen to the hollow main shaft in the early stage of polymerization to remove oxygen to prevent oxygen from hindering the free radical reaction. At the same time, the presence of gas will accelerate the stirring of the mixed liquid.
[0014] The guide line is designed on the reactor wall to make the stirring liquid always move centripetally, avoiding the gel particles from adhering to the reactor interface wall at high rotation speed. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of the utility model.
[0016] In the figure: 1. polymerization kettle; 2. agitator main shaft; 3. frame-type agitator blade; 4. exhaust hole; 5. discharge pipeline; 6. guide line; 7. first bearing; 8. nitrogen inlet pipe; 9. second bearing; 10. reduction box; 11. drive motor; 12. fixed frame; 13. first gear; 14. rotating shaft; 15. second gear; 16. double-paddle blades. DETAILED DESCRIPTION
[0017] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.
[0018] Example: See Figure 1The utility model provides a technical solution: a polymerization kettle for reverse suspension synthesis of highly absorbent resin, comprising a polymerization kettle 1, a fixing frame 12 is provided on the top of the polymerization kettle 1, a second bearing 9 is installed on the fixing frame 12, a nitrogen inlet pipe 8 is connected to the top of the second bearing 9, nitrogen is input through the nitrogen inlet pipe 8 into the agitator main shaft 2, and discharged through the exhaust hole 4 on the agitator main shaft 2, the bottom of the second bearing 9 is connected to the agitator main shaft 2, the agitator main shaft 2 is installed on the top of the polymerization kettle 1 through the first bearing 7, the agitator main shaft 2 is a hollow structure, a plurality of exhaust holes 4 are evenly provided on the agitator main shaft 2, a frame-type stirring blade 3 and a double-paddle blade 16 are installed on the bottom of the agitator main shaft 2, and a guide line 6 is provided on the inner wall of the polymerization kettle 1 to make the stirring liquid always move centripetally, so as to avoid the gel particles adhering to the interface wall of the polymerization kettle 1 at a high speed, which is not conducive to continuous industrial production.
[0019] The bottom of the polymerization kettle 1 is connected with a feed line 5 , on which a valve is installed.
[0020] The agitator main shaft 2 is welded to the inner ring of the first bearing 7 , and a second gear 15 is welded to the agitator main shaft 2 .
[0021] The second gear 15 is meshed with the first gear 13, the first gear 13 is welded on the rotating shaft 14, the rotating shaft 14 is installed on the reduction box 10, and a driving motor 11 is installed on the top of the reduction box 10. The agitator main shaft 2 is driven to rotate through gear meshing, thereby realizing the rotation of the frame stirring blade 3 and the double-paddle blade 16.
[0022] The second bearing 9 is a sealed bearing, and the agitator main shaft 2 is sealed and connected to the nitrogen inlet pipe 8 via the sealed bearing.
[0023] The frame-type stirring blade 3 and the double-paddle blade 16 are both welded to the stirrer main shaft 2 .
[0024] The frame-type stirring blade 3 has a multi-layer grid, and the frame-type stirring blade 3 and the double-paddle blade 16 form a composite grid-shaped structure.
[0025] Working principle: A polymerization kettle for reverse suspension synthesis of highly absorbent resin. When in use, the driving motor 11 drives the gears in the reduction box 10 to rotate, thereby driving the first gear 13 on the rotating shaft 14 to rotate, and the first gear 13 on the rotating shaft 14 is used to rotate to drive the second gear 15 on the agitator main shaft 2 to rotate, and the second gear 15 is used to rotate to drive the agitator main shaft 2 to rotate around the first bearing 7 and the second bearing 9, so that the frame stirring blade 3 and the double paddle blade 16 on the agitator main shaft 2 are rotated. The agitator is in the form of a paddle plus frame combination, which has a strong shear force and solves the problem of uneven mixing at the bottom. The agitator main shaft 2 is a hollow shaft, and a plurality of exhaust holes 4 are designed on the agitator main shaft 2. The main function is to add nitrogen to the hollow main shaft in the early stage of polymerization to remove oxygen to prevent oxygen from hindering the free radical reaction. At the same time, the presence of gas will accelerate the stirring of the mixed liquid, which can make the polymerization kettle more concise. A guide line is designed on the inner wall of the polymerization kettle 1 to make the stirring liquid always move centripetally. In order to avoid gel particles adhering to the interface wall of the polymerization kettle 1 at high speed, which is not conducive to continuous industrial production, one end of the agitator main shaft 2 is connected to one end of the double-paddle blade 16 and the frame-type stirring blade 3, respectively, so that the double-paddle blade 16 and the frame-type stirring blade 3 on the agitator main shaft 2 rotate around the center direction of the agitator main shaft 2; the two side frame arms of the double-paddle blade 16 are cross-angled with each other.
[0026] The frame-type stirring blade 3 has a multi-layer grid, which can increase the stirring convection efficiency, reduce the radial stirring force, and help stabilize the reaction system. It can achieve all-round stirring of the suspended dispersion medium, avoid uneven stirring, promote rapid dissolution of the reactants, and thus obtain a better mixing effect.
[0027] During the use of the reactor, the double-paddle blades 16 and the frame-type stirring blades 3 form a composite grid-shaped structure, which can not only achieve three-dimensional stirring, but also break up the condensate through the grid to avoid the generation of particles due to uneven stirring of the raw materials, so that the reactor can be stirred more evenly during production, which helps to increase the reaction rate. The double-paddle blades 16 rotate and cross to form a V-shape, which has an enhanced shearing effect and makes the stirring shaft run stably. All materials are selected as stainless steel 316L, and the internal surface roughness of the equipment is ≤0.4um to avoid material adhesion and entanglement with the paddle, causing the reaction system to break and explode, and maintain the stability of the system.
[0028] The above embodiments only express the implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.
Claims
1. A polymerization kettle for inverse suspension synthesis of super absorbent resin, comprising a polymerization kettle (1), characterized in that: A fixing frame (12) is provided on the top of the polymerization kettle (1), a second bearing (9) is installed on the fixing frame (12), a nitrogen inlet pipe (8) is connected to the top of the second bearing (9), a stirrer main shaft (2) is connected to the bottom of the second bearing (9), the stirrer main shaft (2) is installed on the top of the polymerization kettle (1) through a first bearing (7), the stirrer main shaft (2) is a hollow structure, a plurality of exhaust holes (4) are evenly arranged on the stirrer main shaft (2), a frame-type stirring blade (3) and a double-blade blade (16) are installed on the bottom of the stirrer main shaft (2), and a guide line (6) is provided on the inner wall of the polymerization kettle (1).
2. The polymerization kettle for inverse suspension synthesis of super absorbent resin according to claim 1, characterized in that: The bottom of the polymerization kettle (1) is connected to a feed line (5).
3. The polymerization kettle for inverse suspension synthesis of super absorbent resin according to claim 1, characterized in that: The stirrer main shaft (2) is welded to the inner ring of the first bearing (7), and a second gear (15) is welded to the stirrer main shaft (2).
4. The polymerization kettle for inverse suspension synthesis of super absorbent resin according to claim 3, characterized in that: The second gear (15) is meshed and connected with the first gear (13); the first gear (13) is welded to a rotating shaft (14); the rotating shaft (14) is mounted on a reduction box (10); and a driving motor (11) is mounted on the top of the reduction box (10).
5. The polymerization kettle for inverse suspension synthesis of super absorbent resin according to claim 1, characterized in that: The second bearing (9) is a sealed bearing, and the stirrer main shaft (2) is sealed and connected to the nitrogen inlet pipe (8) via the sealed bearing.
6. The polymerization kettle for inverse suspension synthesis of super absorbent resin according to claim 1, characterized in that: The frame-type stirring blade (3) and the double-paddle blade (16) are both welded to the stirrer main shaft (2).
7. The polymerization kettle for inverse suspension synthesis of super absorbent resin according to claim 6, characterized in that: The frame-type stirring blade (3) has a multi-layer grid, and the frame-type stirring blade (3) and the double-paddle blade (16) form a composite grid-shaped structure.