Efficient reaction kettle for producing sodium carboxymethyl cellulose

Abstract

The invention relates to the technical field of chemical equipment, in particular to an efficient reaction kettle for sodium carboxymethyl cellulose production, which comprises a kettle body, a stirring motor is mounted at the top of the kettle body, a stirring shaft rotationally connected into the kettle body is fixedly arranged on an output shaft of the stirring motor, stirring blades are fixedly arranged on the outer wall of the stirring shaft, and a stock bin is further mounted at the top of the kettle body. The bottom of the stock bin extends into the kettle body, and a linkage type discharging mechanism connected between the stirring shaft and the stock bin is mounted on the top surface in the kettle body; according to the efficient reaction kettle for sodium carboxymethyl cellulose production, auxiliary materials can be added into materials in multiple times, the reaction rate can be better controlled, too violent or non-uniform reaction is avoided, the stability of the reaction process is ensured, the reaction uniformity and the product quality are further improved, and the production efficiency is improved by adjusting the time interval of adding the auxiliary materials every time. And the characteristics of the final product, such as viscosity, solubility and the like, can be optimized, so that the final product better meets the requirements of specific application.

Description

Technical Field

[0001] The invention relates to the technical field of chemical equipment, in particular to a high-efficiency reaction kettle for producing sodium carboxymethyl cellulose. Background Art

[0002] In the production process of sodium carboxymethyl cellulose (CMC), the use of a reactor can strictly control the reaction conditions, including temperature, pressure and stirring speed. These conditions are essential to ensure the uniformity and efficiency of the carboxymethylation reaction. Through precise control, the purity and yield of the product can be improved. However, in actual production, it is also found that some reactors have the following defects when used: 1. In the production process of sodium carboxymethyl cellulose (CMC), some auxiliary materials are usually required to assist the reaction and improve the performance of the final product, and the existing reactors pour all the auxiliary materials into the reactor at one time, which cannot control the reaction rate well, and the auxiliary materials and materials are difficult to mix evenly; 2. When adding materials, it is difficult to achieve precise control of the amount of materials, which can easily lead to excessive or insufficient addition of materials. Excessive addition of materials can easily exceed the operating load of the reactor, while too little reduces the output, thereby affecting production efficiency. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present invention provides a high-efficiency reactor for producing sodium carboxymethyl cellulose, which solves the technical problem that the existing reactor is difficult to control the reaction rate and feed amount.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a high-efficiency reaction kettle for producing sodium carboxymethyl cellulose, comprising a kettle body, a stirring motor is installed on the top of the kettle body, a stirring shaft rotatably connected to the kettle body is fixedly arranged on the output shaft of the stirring motor, a stirring blade is fixedly arranged on the outer wall of the stirring shaft, a silo is also installed on the top of the kettle body, the bottom of the silo extends into the kettle body, a linkage unloading mechanism connected between the stirring shaft and the silo is installed on the top surface of the inner part of the kettle body, a feeding pipe and a discharging pipe are fixedly arranged on the outer walls of the kettle body near the top and the bottom, respectively, and an automatic stopping mechanism is fixedly arranged at the bottom of one end of the feeding pipe inside the kettle body; The linkage type unloading mechanism comprises an adjustable driving assembly fixedly mounted on the top of the stirring shaft, a toothed disc is provided on one side of the adjustable driving assembly and meshed with the toothed disc, a turntable is fixedly mounted on the toothed disc, the turntable is fixedly connected to the bottom of the fixed shaft, the fixed shaft and the stirring shaft are both rotatably connected in the kettle body through a fixed plate, a convex block with a right-angled trapezoidal cross section is fixedly mounted on the edge of the turntable surface, and a unloading assembly installed on the bottom of the silo is provided on one side of the convex block.

[0005] Preferably, the adjustable driving assembly includes a fixed frame fixed on the outer wall of the stirring shaft, a driving motor is installed on the fixed frame, a driving gear is fixed on the output shaft of the driving motor, an adjusting disk is provided on one side of the driving gear, the adjusting disk is rotatably connected to the stirring shaft through a bearing, an outer wall of the adjusting disk is fixed with external teeth meshing with the driving gear, a fixed disk fixed to the outer wall of the stirring shaft is provided below the adjusting disk, a plurality of sliding grooves are opened on the outer wall of the fixed disk, a tooth block is elastically connected to the sliding groove by a spring, and the fixed disk meshes with the tooth disk through the tooth block.

[0006] Preferably, a detachable battery is installed inside the fixing frame.

[0007] Preferably, an adjustment groove for extruding the tooth block is provided on the outer wall of the adjustment disk, and an extrusion slope is provided at one end of the adjustment groove.

[0008] Preferably, the material unloading assembly includes a guide frame fixedly connected to the bottom of the silo, the inner side of the guide frame is elastically and movably connected with a slider through a second spring, the slider is fixed on the outer wall of the connecting rod, one end of the connecting rod is in sliding contact with the protrusion, and the other end is fixedly connected to a barrel, the barrel is movably sleeved on the bottom of the silo, and a material hole is opened on the outer wall of the barrel near the top and the bottom.

[0009] Preferably, a through hole is provided on the outer wall of the bottom of the silo for the connecting rod to move up and down.

[0010] Preferably, the automatic material stopping mechanism includes a feeding pipe fixedly connected to the bottom of the feeding pipe, the bottom of the feeding pipe is movably connected with a movable rod, the top of the movable rod is fixed with a piston, the piston is movably arranged in the feeding pipe, the bottom of the movable rod is fixed with a floating block, and a second feeding hole is opened on the outer wall of the feeding pipe.

[0011] Preferably, an annular electromagnetic block is fixedly provided on the bottom of the feed pipe and the surface of the floating block.

[0012] By means of the above technical scheme, the present invention provides a high-efficiency reactor for the production of sodium carboxymethyl cellulose, which has at least the following beneficial effects: The high-efficiency reactor for the production of sodium carboxymethyl cellulose is provided with a linkage feeding mechanism, and the number of revolutions of the stirring shaft is used to control the quantitative feeding of auxiliary materials in the silo, so that the auxiliary materials can be added to the material in multiple times. The gradual addition of auxiliary materials can better control the reaction rate, avoid excessive or uneven reactions, ensure the stability of the reaction process, and thus improve the uniformity of the reaction and the quality of the product.

[0013] The high-efficiency reactor for the production of sodium carboxymethyl cellulose is provided with an adjustable driving component. The adjusting disc is rotated to squeeze different numbers of tooth blocks in the adjusting groove. Then, when the fixed disc rotates, different numbers of tooth blocks can be engaged with the tooth disc, thereby changing the rotation angle of the tooth disc. In this way, the feeding frequency of auxiliary materials can be adjusted under different rotation numbers of the stirring shaft. By adjusting the time interval for adding auxiliary materials each time, the characteristics of the final product, such as viscosity, solubility, etc., can be optimized to make it more in line with the requirements of specific applications.

[0014] The high-efficiency reactor for the production of sodium carboxymethyl cellulose is provided with an automatic material stopping mechanism. When the material enters the reactor and reaches the rated amount, the piston moves upward under the action of the floating block and blocks the second material hole. At this time, the feeding is stopped, which has the advantage of accurate feeding.

[0015] The high-efficiency reactor for the production of sodium carboxymethyl cellulose is provided with an electromagnetic block. During stirring, the floating block is fixed to the bottom of the feed pipe by the magnetic attraction of the electromagnetic block when it is energized, so as to avoid the problem of the floating block moving up and down due to the floating of the liquid surface during stirring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application: Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the structure inside the kettle body of the present invention; Figure 3 It is a structural schematic diagram of the linkage type material discharge mechanism of the present invention; Figure 4 This is a structural schematic diagram of the installation position of the drive motor of the present invention; Figure 5 This is a schematic diagram of the structure of the connection between the adjustment disk and the fixed disk of the present invention; Figure 6 It is a structural schematic diagram of the adjustment disk of the present invention; Figure 7 It is a structural schematic diagram of the fixed disk of the present invention; Figure 8 It is a structural schematic diagram of the blanking assembly of the present invention; Fig. 9 It is a structural schematic diagram of the automatic material stopping mechanism of the present invention; Reference numerals: 1. Kettle; 2. Stirring motor; 3. Stirring shaft; 4. Stirring blade; 5. Material bin; 6. Linkage unloading mechanism; 601. Adjustable drive assembly; 6011. Fixed frame; 6012. Drive motor; 6013. Drive gear; 6014. Battery; 6015. Adjustment plate; 60151. External teeth; 60152. Adjustment groove; 60153. Extrusion slope; 6016. Bearing; 6017. Fixed plate; 60171. Sliding groove; 6018. Spring one; 6019, tooth block; 602, toothed disc; 603, turntable; 604, fixed shaft; 605, fixed plate; 606, bump; 607, unloading assembly; 6071, connecting rod; 6072, slider; 6073, spring two; 6074, guide frame; 6075, barrel; 7, feed pipe; 8, automatic material stop mechanism; 801, unloading pipe; 802, movable rod; 803, piston; 804, float; 805, electromagnetic block; 9, discharge pipe. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0018] Sodium carboxymethylcellulose is a widely used water-soluble cellulose derivative. It is obtained by chemically modifying natural cellulose (usually the plant source of cellulose fibers). In this process, carboxymethyl groups are introduced into the cellulose molecule, thereby increasing its water solubility and viscosity.

[0019] Embodiment 1

[0020] Based on the technical defects of the existing technology that it is difficult to control the reaction rate and feed amount, please refer to Figure 1-Figure 9The invention provides a high-efficiency reactor for producing sodium carboxymethyl cellulose, which allows auxiliary materials to be added to materials in multiple times. The gradual addition of auxiliary materials can better control the reaction rate, avoid excessive or uneven reactions, and has the advantage of accurate feeding. The reactor comprises a reactor body 1, a stirring motor 2 is installed on the top of the reactor body 1, a stirring shaft 3 rotatably connected to the reactor body 1 is fixed on the output shaft of the stirring motor 2, a stirring blade 4 is fixed on the outer wall of the stirring shaft 3, a silo 5 is also installed on the top of the reactor body 1, the bottom of the silo 5 extends into the reactor body 1, and a linkage connecting the stirring shaft 3 and the silo 5 is installed on the top surface of the interior of the reactor body 1. A feeding tube 7 and a discharging tube 9 are fixedly arranged on the outer walls of the kettle body 1 near the top and the bottom respectively, and an automatic stopping mechanism 8 is fixedly arranged at the bottom of one end of the feeding tube 7 inside the kettle body 1; the material is first fed into the kettle body 1 through the feeding tube 7, and then the auxiliary material is poured into the silo 5. When the material enters the reactor and reaches the rated amount, the automatic stopping mechanism 8 will automatically block the feeding tube 7 to stop the feeding, and then start the stirring motor 2 and stir the material through the stirring shaft 3 and the stirring blade 4. At this time, under the action of the linkage feeding mechanism 6, the quantitative discharge of the auxiliary material in the silo 5 can be controlled by the number of revolutions of the stirring shaft 3.

[0021] To achieve the function of adding auxiliary materials in batches, please refer to Figure 3 The linkage unloading mechanism 6 includes an adjustable driving component 601 fixedly mounted on the top of the stirring shaft 3, a toothed disc 602 is provided on one side of the adjustable driving component 601 and meshed with the toothed disc 602, a turntable 603 is fixedly mounted on the toothed disc 602, the turntable 603 is fixedly mounted on the bottom of the fixed shaft 604, the fixed shaft 604 and the stirring shaft 3 are rotatably connected in the kettle body 1 through a fixed plate 605, a convex block 606 with a right-angle trapezoidal cross section is fixedly mounted on the edge of the surface of the turntable 603, and a unloading component 607 installed on the bottom of the silo 5 is provided on one side of the convex block 606; the stirring shaft 3 can directly drive the adjustable driving component 601 to rotate, and the adjustable driving component 601 drives the turntable 603 to rotate by meshing with the toothed disc 602, and the turntable 603 is operated by the convex block 606 to realize the quantitative unloading of the auxiliary material.

[0022] To adjust the feeding frequency of auxiliary materials, please refer to the figure Figure 4-Figure 7The adjustable driving assembly 601 includes a fixing frame 6011 fixed on the outer wall of the stirring shaft 3, a driving motor 6012 is installed on the fixing frame 6011, a driving gear 6013 is fixed on the output shaft of the driving motor 6012, an adjusting disk 6015 is provided on one side of the driving gear 6013, the adjusting disk 6015 is rotatably connected to the stirring shaft 3 through a bearing 6016, an outer tooth 60151 meshing with the driving gear 6013 is fixed on the outer wall of the adjusting disk 6015, and a fixed gear 60151 fixed to the outer wall of the stirring shaft 3 is provided below the adjusting disk 6015. The fixed plate 6017 and the outer wall of the fixed plate 6017 are provided with a plurality of sliding grooves 60171, and the sliding grooves 60171 are elastically connected with tooth blocks 6019 through springs 6018. The fixed plate 6017 is meshed with the tooth plate 602 through the tooth blocks 6019; the driving motor 6012 can drive the driving gear 6013 to rotate, and the driving gear 6013 drives the adjusting plate 6015 to rotate through the meshing action with the outer teeth 60151. Since the adjusting plate 6015 can rotate on the stirring shaft 3, and the fixed plate 6017 is fixed on the stirring shaft 3, this When the adjusting disk 6015 rotates, the adjusting groove 60152 can squeeze the tooth block 6019, so that different numbers of tooth blocks 6019 are pressed to the meshing position with the tooth disk 602. By changing the meshing number of the tooth blocks 6019 and the tooth disk 602, the rotation angle of the tooth disk 602 can be controlled. For example, if the number of teeth on the tooth disk 602 is 20, when only one tooth block 6019 is meshed with the tooth disk 602, the stirring shaft 3 rotates one circle, and the tooth disk 602 rotates 18 degrees. When two tooth blocks 6019 are meshed with the tooth disk 602, , when the stirring shaft 3 rotates one circle, the toothed disc 602 rotates 36°. The purpose of this design is that when one tooth block 6019 is engaged with the toothed disc 602, the stirring shaft 3 needs to rotate 20 circles to discharge the material once, and when all the tooth blocks 6019 are engaged with the toothed disc 602, the stirring shaft 3 only needs to rotate 4 circles to discharge the material once. In this way, the feeding frequency of the auxiliary material can be adjusted under different rotation numbers of the stirring shaft 3. By adjusting the time interval for each addition of the auxiliary material, the characteristics of the final product, such as viscosity, solubility, etc., can be optimized to make it more in line with the requirements of specific applications.

[0023] Since the driving motor 6012 rotates together with the stirring shaft 3, the driving motor 6012 cannot be powered by wires. To solve this problem, a detachable battery 6014 is installed inside the fixed frame 6011. The driving motor 6012 is powered by the battery 6014, which solves the above-mentioned wiring difficulty problem and is also convenient for maintenance in the later stage.

[0024] In order to facilitate the adjustment disk 6015 to extrude different numbers of tooth blocks 6019, an adjustment groove 60152 for extruding the tooth blocks 6019 is opened on the outer wall of the adjustment disk 6015, and an extrusion slope 60153 is provided at one end of the adjustment groove 60152; as the adjustment disk 6015 rotates, the adjustment groove 60152 will gradually extrude different numbers of tooth blocks 6019, thereby adjusting the number of engagements between the tooth blocks 6019 and the tooth disk 602.

[0025] To achieve quantitative feeding of auxiliary materials, please refer to Figure 8 The material unloading assembly 607 includes a guide frame 6074 fixedly connected to the bottom of the silo 5, and a slider 6072 is elastically and movably connected to the inner side of the guide frame 6074 through a spring 6073. The slider 6072 is fixed to the outer wall of the connecting rod 6071. One end of the connecting rod 6071 is in sliding contact with the protrusion 606, and the other end is fixedly connected to a barrel 6075. The barrel 6075 is movably sleeved at the bottom of the silo 5. The outer wall of the barrel 6075 near the top and the bottom is provided with a material hole 1; the protrusion 606 presses the connecting rod 6071 upward After that, the connecting rod 6071 moves upward and drives the barrel 6075 to move upward. At this time, the material hole 1 at the top of the barrel 6075 will be exposed, and the auxiliary material enters the barrel 6075 through the upper material hole 1. When the protrusion 606 no longer squeezes the connecting rod 6071, the elastic force of the spring 2 6073 causes the connecting rod 6071 to reset downward. At this time, the barrel 6075 moves downward, the upper material hole 1 is blocked again, and the lower material hole 1 is exposed outside the silo 5, and the auxiliary material leaks into the material through the lower material hole 1.

[0026] In order to facilitate the movement of the connecting rod 6071, a through hole is opened on the outer wall of the bottom of the silo 5 for the connecting rod 6071 to move up and down.

[0027] Embodiment 2

[0028] To solve the problem of excessive or insufficient material intake, please refer to Fig. 9 The automatic material stopping mechanism 8 includes a feed pipe 801 fixedly connected to the bottom of the feed pipe 7, a movable rod 802 is movably connected to the bottom of the feed pipe 801, a piston 803 is fixedly provided on the top of the movable rod 802, the piston 803 is movably arranged in the feed pipe 801, a floating block 804 is fixedly provided at the bottom of the movable rod 802, and a second material hole is opened on the outer wall of the feed pipe 801; after the material enters the reactor and reaches the rated amount, the piston 803 moves upward under the action of the floating block 804 and blocks the second material hole, and the feeding is stopped at this time, which has the advantage of accurate feeding.

[0029] In order to avoid the problem of the floating block 804 moving up and down during the stirring process, an annular electromagnetic block 805 is fixed at the bottom of the discharge pipe 801 and the surface of the floating block 804; during stirring, the floating block 804 is fixed to the bottom of the discharge pipe 801 by the magnetic attraction of the electromagnetic block 805 when it is energized, so as to avoid the problem of the floating block 804 moving up and down due to the floating of the liquid surface during stirring.

[0030] It should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency reaction kettle for producing sodium carboxymethyl cellulose, comprising a kettle body (1), a stirring motor (2) is installed on the top of the kettle body (1), a stirring shaft (3) rotatably connected to the kettle body (1) is fixedly provided on the output shaft of the stirring motor (2), a stirring blade (4) is fixedly provided on the outer wall of the stirring shaft (3), a silo (5) is also installed on the top of the kettle body (1), and the bottom of the silo (5) extends into the kettle body (1), characterized in that: The top surface of the interior of the kettle body (1) is provided with a linkage type material discharge mechanism (6) connected between the stirring shaft (3) and the material bin (5); a material feed pipe (7) and a material discharge pipe (9) are fixedly provided on the outer walls of the kettle body (1) near the top and the bottom, respectively; an automatic material stop mechanism (8) is fixedly provided at the bottom of one end of the material feed pipe (7) located inside the kettle body (1); The linkage type unloading mechanism (6) comprises an adjustable driving assembly (601) fixedly mounted on the top of the stirring shaft (3); a toothed disc (602) is provided on one side of the adjustable driving assembly (601) and meshes with the toothed disc (602); a rotating disc (603) is fixedly mounted on the toothed disc (602); the rotating disc (603) is fixedly mounted on the bottom of a fixed shaft (604); the fixed shaft (604) and the stirring shaft (3) are both rotatably connected in the kettle body (1) via a fixed plate (605); a convex block (606) having a right-angle trapezoidal cross section is fixedly mounted on the edge of the surface of the rotating disc (603); and a unloading assembly (607) mounted on the bottom of the silo (5) is provided on one side of the convex block (606).

2. The high-efficiency reactor for producing sodium carboxymethylcellulose according to claim 1, characterized in that: The adjustable drive assembly (601) comprises a fixing frame (6011) fixedly mounted on the outer wall of the stirring shaft (3); a driving motor (6012) is mounted on the fixing frame (6011); a driving gear (6013) is fixedly mounted on the output shaft of the driving motor (6012); an adjusting disk (6015) is provided on one side of the driving gear (6013); the adjusting disk (6015) is rotatably connected to the stirring shaft (3) via a bearing (6016); and a drive gear (6013) is fixedly mounted on the outer wall of the adjusting disk (6015). An external tooth (60151) meshing with the driving gear (6013) is provided, and a fixed disk (6017) fixedly connected to the outer wall of the stirring shaft (3) is provided below the adjusting disk (6015). A plurality of sliding grooves (60171) are provided on the outer wall of the fixed disk (6017), and a tooth block (6019) is elastically and movably connected in the sliding groove (60171) via a spring 1 (6018). The fixed disk (6017) meshes with the tooth disk (602) via the tooth block (6019).

3. The high-efficiency reactor for producing sodium carboxymethylcellulose according to claim 2, characterized in that: A detachable battery (6014) is installed inside the fixing frame (6011).

4. The high-efficiency reactor for producing sodium carboxymethylcellulose according to claim 2, characterized in that: An adjustment groove (60152) for extruding the tooth block (6019) is provided on the outer wall of the adjustment disk (6015), and an extrusion inclined surface (60153) is provided at one end of the adjustment groove (60152).

5. The high-efficiency reactor for producing sodium carboxymethylcellulose according to claim 1, characterized in that: The material discharge assembly (607) comprises a guide frame (6074) fixedly connected to the bottom of the silo (5); the inner side of the guide frame (6074) is elastically and movably connected to a slider (6072) via a second spring (6073); the slider (6072) is fixedly arranged on the outer wall of a connecting rod (6071); one end of the connecting rod (6071) is in sliding contact with a protrusion (606); the other end of the connecting rod (6071) is fixedly connected to a barrel (6075); the barrel (6075) is movably sleeved on the bottom of the silo (5); and a material hole 1 is provided on the outer wall of the barrel (6075) near the top and the bottom.

6. The high-efficiency reactor for producing sodium carboxymethylcellulose according to claim 5, characterized in that: A through hole is provided on the outer wall of the bottom of the silo (5) for the connecting rod (6071) to move up and down.

7. The high-efficiency reactor for producing sodium carboxymethylcellulose according to claim 1, characterized in that: The automatic material stopping mechanism (8) comprises a material discharge pipe (801) fixedly connected to the bottom of the material feed pipe (7); a movable rod (802) is movably connected to the bottom of the material discharge pipe (801); a piston (803) is fixedly provided on the top of the movable rod (802); the piston (803) is movably arranged in the material discharge pipe (801); a floating block (804) is fixedly provided at the bottom of the movable rod (802); and a second material hole is opened on the outer wall of the material discharge pipe (801).

8. The high-efficiency reactor for producing sodium carboxymethylcellulose according to claim 7, characterized in that: An annular electromagnetic block (805) is fixedly provided on the bottom of the feed pipe (801) and the surface of the floating block (804).

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