Corn starch raw material stable adjusting device for papermaking

Abstract

The utility model belongs to the field of papermaking equipment, in particular to a corn starch raw material stable adjusting device for papermaking, which comprises a starch reaction tank and an amylase storage chamber, a motor, a feed inlet and a water inlet pipe are mounted at the upper end of the starch reaction tank, a rotating shaft is arranged in the starch reaction tank, the motor is connected with the rotating shaft, and a stirring rod is arranged on the rotating shaft. An electromagnetic valve is arranged at the bottom of the reaction tank 1 and connected with a discharging pipe, the motor is connected with a current detection device, the amylase storage chamber is connected with an amylase liquid inlet pipe, the amylase liquid inlet pipe is connected with the starch reaction tank, and a first flow control device is arranged on the amylase liquid inlet pipe; and the first flow control device and the current detection device are respectively connected with the control system. According to the utility model, the relationship between the motor current and the viscosity of the corresponding solution is obtained through observation, statistics and research, the sampling detection process is simplified, the result is quantified, the viscosity of the starch solution can be known in real time, the addition of amylase is electrically controlled, and the process of adjusting the viscosity of the starch solution is simplified.

Description

Technical Field

[0001] The invention relates to a corn starch raw material stabilizing and regulating device, in particular to a corn starch raw material stabilizing and regulating device used for papermaking. Background Art

[0002] In the papermaking industry, domestic corn starch has replaced imported cassava starch, breaking the monopoly on raw material imports, solving the disadvantage of long transportation cycles, and avoiding the risk of material shortages. However, corn starch has large viscosity fluctuations and the screen residue is difficult to control. How to ensure stable quality, and then ensure the normal physical properties of the finished paper and the operability of the coating head, and ensure the stability of corn starch quality is also a prerequisite for reducing costs.

[0003] Corn starch, due to its high protein and fat content, can cause high residue during the cooking process. Corn starch also has a high amylose content, strong intermolecular bonding, and weak hydrophilicity, leading to large fluctuations in starch viscosity during the cooking process. High residue can easily lead to paper defects and breakage, and large fluctuations in viscosity cause large fluctuations in coating weight, which in turn affects the physical properties of the finished paper. Existing technology using cassava starch relies on regular on-site sampling, testing, and concentration adjustment. However, with corn starch, viscosity fluctuates greatly, and on-site personnel cannot monitor viscosity changes in real time through spot checks, nor can they frequently adjust the concentration, which consumes a lot of manpower. Controlling the stability of corn starch viscosity and reducing residue has become a challenge. Summary of the Invention

[0004] In view of the above problems, the present invention provides a device for stabilizing and regulating corn starch raw materials for papermaking, and aims to solve the problem that the viscosity of the existing corn starch solution cannot be monitored in real time and the residue in the starch cannot be reduced.

[0005] To achieve the above-mentioned purpose, the technical solution of the embodiment of the present invention is implemented as follows:

[0006] A corn starch raw material stabilization and regulation device for papermaking includes a starch reaction tank and an amylase storage chamber. A motor, a feed port, and a water inlet pipe are installed at the upper end of the starch reaction tank. A rotating shaft is provided in the starch reaction tank, the motor is connected to the rotating shaft, and a stirring rod is provided on the rotating shaft. A solenoid valve is provided at the bottom of the reaction tank, the solenoid valve is connected to the discharge pipe, the motor is connected to a current detection device, the amylase storage chamber is connected to an amylase liquid inlet pipe, the amylase liquid inlet pipe is connected to the starch reaction tank, and a first flow control device is provided on the amylase liquid inlet pipe. The first flow control device and the current detection device are respectively connected to a control system.

[0007] Furthermore, the starch reaction tank is connected to a sodium hydroxide liquid inlet pipe, and the sodium hydroxide liquid inlet pipe is connected to a sodium hydroxide storage chamber.

[0008] Furthermore, an online pH meter is provided in the starch reaction tank, a second flow control device is provided on the sodium hydroxide inlet pipe, and the online pH meter and the second flow control device are respectively connected to the control system.

[0009] Furthermore, the starch reaction tank is connected to a protein inhibitor liquid inlet pipe, and the protein inhibitor liquid inlet pipe is connected to a protein inhibitor storage chamber.

[0010] Furthermore, a filtering device is detachably installed in the discharge pipe.

[0011] Furthermore, a filter screen and a filter membrane are provided in the filtration device, and the starch solution is filtered through the filter screen and then filtered through the filter membrane.

[0012] Furthermore, multiple layers of first shearing blades are provided on the rotating shaft, and multiple layers of second shearing blades are provided on the inner wall of the starch reaction tank. The rotation of the rotating shaft drives the first shearing blades to rotate, and the two adjacent second shearing blades above and below accommodate one first shearing blade 20 passing through.

[0013] The beneficial effects of the present invention are as follows: by observing and studying the changes in the viscosity of the corn starch solution and the motor current, the real-time viscosity of the corn starch is quantified into real-time data of the motor current, and the input amount of amylase is adjusted in real time through the DCS control system, so that the viscosity of the final corn starch solution meets the requirements and is stable.

[0014] The online pH meter in the starch reaction tank can be used to measure the pH value of corn starch in real time. The DCS control system can then be used to control the input of sodium hydroxide, a gelatinizing agent, to ensure that the pH value of the corn starch solution is stable and at the most suitable pH value for corn starch gelatinization. This allows amylase to break down corn starch into small molecular fragments, reducing the sieve residue in the corn starch solution and ensuring smooth subsequent production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a device for stabilizing and regulating corn starch raw materials for papermaking according to the present invention;

[0016] Figure 2 The corresponding relationship between the agitator current and viscosity of the starch reaction tank;

[0017] Figure 3 This is a schematic diagram of a corn starch raw material stabilization and regulation device for papermaking according to the present invention, in which shear blades are added;

[0018] Figure 4 This is an enlarged view of area A of a corn starch raw material stabilization and regulation device for papermaking in the utility model.

[0019] Explanation of the accompanying numbers: 1. Starch reaction tank; 2. Motor; 3. Rotating shaft; 4. Stirring rod; 5. Feed inlet; 6. Water inlet; 7. Discharge pipe; 8. Solenoid valve; 9. Amylase storage chamber; 10. First flow control device; 11. Amylase liquid inlet pipe; 12. Online pH meter; 13. Sodium hydroxide storage chamber; 14. Second flow control device; 15. Sodium hydroxide liquid inlet pipe; 16. Current detection device; 17. Filter device; 18. Filter membrane; 19. Filter screen; 20. First shearing blade; 21. Second shearing blade; 22. Protein inhibitor liquid inlet pipe; 23. Third flow control device; 24. Protein inhibitor storage chamber. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further elaborated in detail below in conjunction with the drawings and specific embodiments of the specification. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. In the following description, reference is made to "some embodiments", which describes a subset of all possible embodiments, but it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0021] Example 1

[0022] Combined with reference to Figures 1 to 3The utility model provides a corn starch raw material stabilization and regulation device for papermaking, comprising a starch reaction tank 1 and an amylase storage chamber 9. A motor 2, a feed port 5 and a water inlet pipe 6 are installed at the upper end of the starch reaction tank 1. A rotating shaft 3 is provided in the starch reaction tank 1. The motor 2 is connected to the rotating shaft 3. A stirring rod 4 is provided on the rotating shaft 3. A solenoid valve 8 is provided at the bottom of the reaction tank 1. The solenoid valve 8 is connected to the discharge pipe 7. The motor 2 is connected to a current detection device 16. The amylase storage chamber 9 is connected to an amylase liquid inlet pipe 11. The amylase liquid inlet pipe 11 is connected to the starch reaction tank 1. A first flow control device 10 is provided on the amylase liquid inlet pipe 11. The first flow control device 10 and the current detection device 16 are respectively connected to a control system. By observing and statistically analyzing the relationship between the current of the motor 2 and the viscosity of the starch solution in the starch reaction tank 1, a certain proportion of raw materials and water are first added through the water inlet pipe 6 and the feed port 5, and the motor 2 is started to stir the solution in the starch reaction tank 1. Since solutions of different viscosities have different resistance to the stirring rod 4, the current detection device 16 detects different currents of the motor 2. The current data is connected to the DCS control system, and the viscosity of the corn starch solution at this time can be intuitively known from the operation interface. The first flow control device 10 is controlled through the operation interface, and amylase is added. The viscosity of the corn starch solution can be known in real time, and there is no need for manual sampling and testing each time, which simplifies the operation process, saves time for adjusting the viscosity of the corn starch solution, and ultimately ensures the stability of the viscosity of the corn starch solution in the starch reaction tank 1, which is conducive to the smooth subsequent papermaking production.

[0023] Preferably, the starch reaction tank 1 is connected to a sodium hydroxide liquid inlet pipe 15, and the sodium hydroxide liquid inlet pipe 15 is connected to the sodium hydroxide storage chamber 13. Adding the gelatinizer sodium hydroxide into the starch reaction tank 1 helps dissolve the starch agglomerate, helps reduce starch residue, and helps the subsequent reaction of amylase and corn starch to generate small molecular fragments. After adding the gelatinizer sodium hydroxide, the whole process can be made smoother, and the viscosity of the corn starch solution will not fluctuate due to the sudden dissolution of starch residue.

[0024] Preferably, an online pH meter 12 is provided in the starch reaction tank 1, and a second flow control device 14 is provided on the sodium hydroxide inlet pipe 15. The online pH meter 12 and the second flow control device 14 are respectively connected to the DCS control system. By connecting the online pH meter and the second flow control device 14 to the control system, the pH value of the corn starch solution can be known in real time, and the gelatinizer sodium hydroxide solution can be added directly to the system in real time. Because the uniformly prepared sodium hydroxide solution ensures a fixed concentration of the sodium hydroxide solution, the flow rate of the sodium hydroxide solution to be added can be easily quantified, the addition of the sodium hydroxide solution can be adjusted in real time, and the pH value change after the addition of the sodium hydroxide solution is observed to ensure that the corn starch solution is at the best pH value for gelatinization, saving the time of detecting the pH value of the corn starch solution, unifying the concentration of the sodium hydroxide solution, and facilitating the control of the amount of sodium hydroxide solution added.

[0025] Preferably, the starch reaction tank 1 is connected to a protein inhibitor inlet pipe 22, which is connected to a protein inhibitor storage chamber 24. The protein inhibitor is added before the gelatinizer is added to inhibit protein precipitation, reduce the sieve residue in the corn starch solution, and ensure the smooth progress of subsequent production.

[0026] Preferably, a filter device 17 is detachably mounted in the discharge pipe 7. The filter device 17 is detachably mounted in the discharge pipe 7, so that the filter device 17 can be easily replaced and maintained after being used for too long, without delaying subsequent production operations.

[0027] Preferably, a filter screen 19 and a filter membrane 18 are provided in the filter device 17. After the starch solution is filtered through the filter screen 19, it is filtered through the filter membrane 18. Larger particles of the residue are first filtered through the filter screen 19 to reduce damage to the filter membrane 18 caused by the residue, thereby extending the service life of the filter device 17. Smaller particles of the residue are then filtered through the filter screen 19. The two filtration steps ensure that the final viscosity of the starch solution meets production standards and that there is no residue in the solution that would reduce the quality of subsequent paper.

[0028] Example 2

[0029] See attached Figure 3 and 4The difference between this embodiment and the first embodiment is that: a plurality of first shearing blades 20 are provided on the rotating shaft 3, and a plurality of second shearing blades 21 are provided on the inner wall of the starch reaction tank 1. The rotation of the rotating shaft 3 drives the first shearing blades 20 to rotate, and the two second shearing blades 21 adjacent to each other above and below accommodate the passage of one first shearing blade 20. By providing the interacting first shearing blades 20 and second shearing blades in the starch reaction tank 1, the starch clumps in the corn starch solution can be broken up as much as possible, ensuring that the corn starch can be completely gelatinized within a certain period of time. By strengthening the physical grinding and chemically adding the gelatinizer sodium hydroxide, the dual method ensures that the corn starch can be completely gelatinized, does not produce screen residue, and does not affect the viscosity of the solution adjusted by the subsequent addition of amylase. It ensures that the viscosity of the corn starch solution output from the discharge port is stable, there is no screen residue, and will not have an adverse effect on the subsequent paper production.

[0030] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. The scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A corn starch raw material stabilization and regulation device for papermaking, comprising a starch reaction tank (1) and an amylase storage chamber (9), characterized in that: The starch reaction tank (1) is provided with a motor (2), a feed port (5) and a water inlet pipe (6) at the upper end thereof. A rotating shaft (3) is provided in the starch reaction tank (1). The motor (2) is connected to the rotating shaft (3). A stirring rod (4) is provided on the rotating shaft (3). A solenoid valve (8) is provided at the bottom of the reaction tank (1). The solenoid valve (8) is connected to the discharge pipe (7). The motor (2) is connected to a current detection device (16). The amylase storage chamber (9) is connected to an amylase liquid inlet pipe (11). The amylase liquid inlet pipe (11) is connected to the starch reaction tank (1). A first flow control device (10) is provided on the amylase liquid inlet pipe (11). The first flow control device (10) and the current detection device (16) are respectively connected to a control system.

2. The device for stabilizing and regulating corn starch raw materials for papermaking according to claim 1, characterized in that: The starch reaction tank (1) is connected to a sodium hydroxide liquid inlet pipe (15), and the sodium hydroxide liquid inlet pipe (15) is connected to a sodium hydroxide storage chamber (13).

3. The device for stabilizing and regulating corn starch raw materials for papermaking according to claim 2, characterized in that: An online pH meter (12) is provided in the starch reaction tank (1), a second flow control device (14) is provided on the sodium hydroxide inlet pipe (15), and the online pH meter (12) and the second flow control device (14) are respectively connected to a control system.

4. The device for stabilizing and regulating corn starch raw materials for papermaking according to claim 1, characterized in that: The starch reaction tank (1) is connected to a protein inhibitor liquid inlet pipe (22), and the protein inhibitor liquid inlet pipe (22) is connected to a protein inhibitor storage chamber (24).

5. The device for stabilizing and regulating corn starch raw materials for papermaking according to claim 1, characterized in that: A filtering device (17) is detachably installed in the discharge pipe (7).

6. The device for stabilizing and regulating corn starch raw materials for papermaking according to claim 5, characterized in that: The filtering device (17) is provided with a filter screen (19) and a filter membrane (18). The starch solution is filtered through the filter screen (19) and then filtered through the filter membrane (18).

7. The device for stabilizing and regulating corn starch raw materials for papermaking according to claim 1, characterized in that: The rotating shaft (3) is provided with multiple layers of first shearing blades (20), and the inner wall of the starch reaction tank (1) is provided with multiple layers of second shearing blades (21). The rotating shaft (3) rotates to drive the first shearing blades (20) to rotate, and the two upper and lower adjacent second shearing blades (21) accommodate one first shearing blade (20) to pass through.

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