Paper pulp mixing equipment and mixing method

Abstract

The invention discloses paper pulp mixing equipment which comprises a mixing tank, a servo motor is arranged on one side of the mixing tank, the paper pulp mixing equipment further comprises a stirring assembly, and the stirring assembly is installed in the mixing tank; the sensing assembly is arranged in the mixing tank; wherein the servo motor drives the stirring assembly to mix and stir materials in the mixing tank, and the sensing assembly senses the mixing condition and the conveying condition of the materials. The invention relates to the technical field of papermaking equipment, uniform mixing and efficient dispersion of pulp are ensured by adopting dual effects of cutting and crushing and ultrasonic oscillation, so that the pulp mixing effect and mixing efficiency are improved, the pulp mixing condition is monitored in real time in the pulp mixing process, the pulp does not need to be sampled for multiple times, and the paper pulp mixing efficiency is improved. The mixing uniformity of the paper pulp is effectively monitored in real time, and the mixing quality and efficiency of the paper pulp are improved.

Description

Technical Field

[0001] The invention relates to the technical field of papermaking equipment, in particular to a pulp mixing device and a mixing method. Background Art

[0002] As a key process equipment in the papermaking industry, pulp mixing equipment is mainly used to perform processes such as crushing, mixing and uniform stirring of pulp raw materials. The core function of this equipment is to ensure the full crushing and mixing of pulp, thereby ensuring the comprehensive quality of pulp and providing a smooth foundation for the subsequent papermaking process. In the prior art, pulp mixing equipment has low pulp mixing efficiency and poor mixing uniformity. In the mixing process, the pulp needs to be sampled and analyzed multiple times to monitor the mixing state and quality of the pulp. The process is relatively cumbersome and it is impossible to effectively monitor the pulp mixing process in real time. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a pulp mixing device and a mixing method, which solve the problems in the prior art that the pulp mixing equipment has low pulp mixing efficiency and poor mixing uniformity, and during the mixing process, the pulp needs to be sampled and analyzed multiple times to monitor the mixing state and quality of the pulp. The process is relatively cumbersome and the pulp mixing process cannot be effectively monitored in real time.

[0004] To achieve the above-mentioned purpose, the present invention provides a pulp mixing device, including a mixing tank, a servo motor is arranged on one side of the mixing tank, the pulp mixing device also includes a stirring component, the stirring component is installed inside the mixing tank; the sensing component is arranged inside the mixing tank; wherein the stirring component is driven by the servo motor to mix and stir the materials in the mixing tank, and the mixing and conveying conditions of the materials are sensed by the sensing component.

[0005] Preferably, the stirring assembly includes a stirring unit, which is arranged inside the mixing tank; an oscillation unit is arranged outside the stirring unit and installed on the top of the mixing tank; and a scraping unit is arranged at the bottom of the stirring unit; wherein, through the rotation of the stirring unit and the scraping unit, the materials are mixed and stirred, and the inner wall of the mixing tank is scraped, and the oscillation unit performs ultrasonic oscillation during the stirring process to quickly disperse the material lumps.

[0006] Preferably, the stirring unit includes a support seat, two support seats are provided, which are fixedly connected to the top and bottom of the mixing tank respectively; the vertical shaft is rotatably connected to the inner wall of the support seat through a sealed bearing, and one end of the bottom extends to the outside of the support seat and the mixing tank, and is connected to the servo motor through a belt and a pulley; the spiral blade is fixedly connected to the outer wall of the vertical shaft; the dispersion teeth are arranged on the outer side surface of the bottom of the spiral blade; wherein the vertical shaft is installed inside the mixing tank through the support seat, and is driven by the servo motor to drive the spiral blade and the dispersion teeth to rotate, so as to efficiently rotate and mix the materials inside the mixing tank, and further break up the lumps in the materials through the dispersion teeth, so as to realize rapid mixing and uniform dispersion of water and slurry.

[0007] Preferably, the oscillation unit includes an ultrasonic transducer, a plurality of ultrasonic transducers are provided, respectively installed on the top of the mixing tank and symmetrically distributed on the outside of the stirring unit; an oscillation rod is provided inside the mixing tank and fixedly connected to the output end of the ultrasonic transducer; a plurality of protrusions are provided, distributed on the outer wall of the oscillation rod; wherein the ultrasonic transducer is connected to an ultrasonic generator, and during the slurry stirring and mixing process, the ultrasonic transducer ultrasonically oscillates the slurry inside the mixing tank through the oscillation rod, and increases the contact area with the slurry through a plurality of protrusions, thereby improving the propagation effect of ultrasonic waves in the slurry, and further improving the dispersion efficiency of agglomerates in the slurry.

[0008] Preferably, the scraping unit includes an inclined plate, two of which are symmetrically distributed on both sides of the bottom of the vertical axis and fixedly connected to the vertical axis; an inclined surface is arranged at the top of the outer wall of the inclined plate; wherein the inclined plate rotates under the drive of the vertical axis to scrape the inner wall of the mixing tank to prevent the material from being deposited on the inner wall; at the same time, through the setting of the inclined surface, the inclined plate can rotate more smoothly and reduce the resistance during scraping.

[0009] Preferably, the sensing component includes a mixing sensing unit, which is distributed on both sides of the mixing tank; the residual sensing unit is installed on the bottom side of the mixing tank; wherein the mixing sensing unit senses the mixing condition of the slurry, and the residual sensing unit senses the residual condition during the pulp material conveying process, and transmits the sensing signals to the control system of the equipment respectively, which is beneficial for the staff to grasp the pulp mixing condition, material conveying progress and equipment operation condition.

[0010] Preferably, the mixing sensing unit includes a transverse tube, two of which are fixedly connected to the two sides of the support seat located at the top; a waterproof sleeve is fixedly connected to the end of the transverse tube; a static torque sensor is installed inside the waterproof sleeve; a connecting seat is rotatably connected to the inner wall of the waterproof sleeve through a sealed bearing, and is fixedly connected to the sensing end of the static torque sensor; a sensing rod is fixedly connected to the bottom of the connecting seat; wherein, the static torque sensor is installed on both sides of the support seat located at the top through the transverse tube and the waterproof sleeve, and during the slurry mixing process, the sensing rod is impacted by the agglomerates in the slurry, and the impact force is transmitted to the sensing end of the static torque sensor through the connecting seat, and the sensing signal is transmitted to the control system of the equipment, and the control system realizes the analysis of the slurry mixing condition through the torque data change.

[0011] Preferably, the remaining amount sensing unit includes a sensing tube, which is installed at the bottom of one side of the mixing tank and passes through the mixing tank; the cover plate is fixedly connected to the open end of the sensing tube; the PVC sealing gasket is arranged on the side where the sensing tube and the cover plate are close to each other; the conductive medium is arranged inside the sensing tube; and the pressure sensor is installed at the bottom of the sensing tube; wherein the pulp in the mixing tank applies pressure to the PVC sealing gasket and transmits the pressure to the pressure sensor through the conductive medium, and the pressure sensor transmits the sensing signal to the control system of the equipment, and when the slurry is input or output, the control system realizes the analysis and measurement of the slurry remaining situation through the change of pressure data.

[0012] Preferably, a rotation speed sensor is installed on one side of the support seat.

[0013] The present invention also provides a pulp mixing method, comprising the following steps:

[0014] S1. Select renewable natural plants as raw materials, extract cellulose and hemicellulose from them, perform chemical modification, introduce environmentally friendly functional groups, and add the modified nanofibers to the papermaking pulp in a mixing tank in a certain proportion;

[0015] S2. The servo motor is turned on through the controller to drive the vertical shaft to drive the spiral blade and the scraper unit to rotate, and the speed of the vertical shaft is adjusted and controlled by the speed data sensed by the speed sensor. The slurry is stirred and mixed under the action of the spiral blade, and the agglomerates in the slurry are broken by the dispersing teeth at the bottom of the spiral blade;

[0016] S3. The ultrasonic transducer performs ultrasonic oscillation on the slurry inside the mixing tank through an oscillating rod, further improving the dispersion efficiency of agglomerates in the slurry and making the slurry quickly and evenly mixed;

[0017] S4. The inclined plate scrapes the inner wall of the mixing tank to prevent the material from being deposited on the inner wall of the mixing tank;

[0018] S5. During the slurry mixing process, the agglomerates in the slurry impact the sensing rod, causing torque changes at the connection seat and the static torque sensor. The static torque sensor transmits the sensing signal to the control system in real time. The control system determines the mixing condition of the slurry according to the torque data changes. When the torque data remains stable, it is determined that the slurry is mixed evenly. The control system controls the servo motor to stop working, completing the slurry mixing operation;

[0019] S6. The pulp in the mixing tank continuously applies pressure to the PVC sealing pad and transmits the pressure to the pressure sensor through the conductive medium. The pressure sensor transmits the sensing signal to the control system in real time. The control system determines the remaining amount of pulp according to the change of pressure data. When the pressure data drops to the preset threshold, the control system closes the discharge valve and waits for the next pulp mixing operation.

[0020] Beneficial Effects

[0021] The invention provides a pulp mixing device. The device has the following beneficial effects: the device effectively cuts and crushes lumps in the pulp through the rotation of spiral blades and dispersing teeth, scrapes the inner wall of the mixing tank with an inclined plate to prevent material from being deposited on the inner wall, and performs ultrasonic high-frequency vibration on the pulp inside the mixing tank, so that the pulp lumps are quickly decomposed and crushed under the action of high-frequency vibration, and adopts the dual effects of cutting and crushing and ultrasonic oscillation to ensure uniform mixing and efficient dispersion of the pulp, thereby improving the pulp mixing effect and mixing efficiency, and in the pulp mixing process, the static torque sensor senses the change of the value, judges the mixing condition of the pulp, and monitors the mixing condition of the pulp in real time, without multiple sampling of the pulp, and forms real-time and effective monitoring of the mixing uniformity of the pulp, thereby improving the mixing quality and efficiency of the pulp. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 Schematic diagram of the appearance of the spiral blade, the dispersion teeth and the inclined plate in the present invention;

[0024] Figure 3 Schematic diagram of the appearance of the ultrasonic transducer, the oscillation rod and the protrusion in the present invention;

[0025] Figure 4 for Figure 1 A partial enlarged view of the middle A area;

[0026] Figure 5 for Figure 1 A partial enlarged view of area B in the middle.

[0027] In the figure: 1. mixing tank; 2. stirring component; 3. sensing component; 4. servo motor; 21. stirring unit; 22. oscillation unit; 23. scraping unit; 21. stirring unit; 211. support seat; 212. vertical axis; 213. spiral blade; 214. dispersion tooth; 22. oscillation unit; 221. ultrasonic transducer; 222. oscillation rod; 223. protrusion; 23. scraping unit; 231. inclined plate; 232. inclined plane; 31. mixing sensing unit; 311. horizontal tube; 312. waterproof sleeve; 313. static torque sensor; 314. connecting seat; 315. sensing rod; 32. residual sensing unit; 321. sensing tube; 322. cover plate; 323. PVC sealing pad; 324. conductive medium; 325. pressure sensor; 33. speed sensor. DETAILED DESCRIPTION

[0028] 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.

[0029] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and appropriate controllers and encoders should be selected according to actual conditions to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principles and processes, and no longer explains the electrical control.

[0030] By those skilled in the art, the components in this case are connected in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process.

[0031] Depend on Figure 1 It can be seen that a pulp mixing device in this case includes a mixing tank 1, a servo motor 4 is arranged on one side of the mixing tank 1, and the pulp mixing device also includes a stirring component 2 and a sensing component 3, the stirring component 2 is installed inside the mixing tank 1; the sensing component 3 is arranged inside the mixing tank 1; wherein, the stirring component 2 is driven by the servo motor 4 to mix and stir the materials in the mixing tank 1, and the material mixing and conveying conditions are sensed by the sensing component 3.

[0032] In the specific implementation process, it is worth pointing out that the mixing tank 1 is made of stainless steel, and water and slurry are loaded from the top and discharged from the bottom side. The servo motor 4 provides power to the pulp mixing equipment. Through the drive of the servo motor 4, the stirring component 2 can efficiently mix and stir the materials in the mixing tank 1 and improve the uniformity of the pulp mixing. At the same time, the sensing component 3 senses the slurry mixing and conveying conditions inside the mixing tank 1, so that the staff can quickly grasp the progress of slurry mixing and conveying. The specific model of the servo motor 4 is not limited, and it can meet the use requirements.

[0033] In one practicable manner, see Figure 1 , Figure 2 and Figure 3 The stirring assembly 2 includes a stirring unit 21, an oscillation unit 22 and a scraping unit 23. The stirring unit 21 is arranged inside the mixing tank 1; the oscillation unit 22 is arranged outside the stirring unit 21 and installed on the top of the mixing tank 1; the scraping unit 23 is arranged at the bottom of the stirring unit 21; wherein, through the rotation of the stirring unit 21 and the scraping unit 23, the materials are mixed and stirred, and the inner wall of the mixing tank 1 is scraped, and the oscillation unit 22 performs ultrasonic oscillation during the stirring process to quickly disperse the material lumps.

[0034] In the specific implementation process, it is worth pointing out that the stirring unit 21 and the scraping unit 23 are driven to rotate by the servo motor 4, so that the water and slurry in the mixing tank 1 are fully mixed, and the slurry is prevented from being deposited at the bottom of the inner wall of the mixing tank 1, thereby improving the mixing efficiency of the slurry. At the same time, during the slurry mixing process, ultrasonic oscillations are generated by the oscillation unit 22, and the slurry inside the mixing tank 1 is vibrated at high frequency, so that the lumps in the slurry are quickly dispersed, thereby further improving the mixing uniformity and mixing efficiency of the slurry.

[0035] In one practicable manner, see Figure 1 and Figure 2The stirring unit 21 includes a support seat 211, a vertical shaft 212, a spiral blade 213 and a dispersion tooth 214. The support seat 211 is provided with two, which are fixedly connected to the top and bottom of the mixing tank 1 respectively; the vertical shaft 212 is rotatably connected to the inner wall of the support seat 211 through a sealed bearing, and one end of the bottom extends to the outside of the support seat 211 and the mixing tank 1, and is connected to the servo motor 4 through a belt and a pulley; the spiral blade 213 is fixedly connected to the outer wall of the vertical shaft 212; the dispersion tooth 214 is arranged on the outer side of the bottom of the spiral blade 213; wherein, the vertical shaft 212 is installed inside the mixing tank 1 through the support seat 211, and is driven by the servo motor 4 to drive the spiral blade 213 and the dispersion tooth 214 to rotate, so as to efficiently rotate and mix the materials inside the mixing tank 1, and further break up the lumps in the materials through the dispersion tooth 214, so as to realize rapid mixing and uniform dispersion of water and slurry.

[0036] In the specific implementation process, it is worth pointing out that the vertical shaft 212 is supported inside the mixing tank 1 by the support seat 211. During the slurry mixing process, the vertical shaft 212 and the spiral blade 213 are driven to rotate by the servo motor 4. The spiral blade 213 generates forced convection and shear force when rotating, pushing the slurry to the bottom of the mixing tank 1, so that the material forms a circulating flow in the mixing tank 1. At the same time, the dispersing teeth 214 at the bottom of the spiral blade 213 cut and break the lumps in the slurry. Through the interaction between the blades and the dispersing teeth 214 and the material, the lumps in the slurry are quickly dispersed, thereby improving the pulp mixing uniformity and mixing efficiency.

[0037] In one practicable manner, see Figure 1 and Figure 3 The oscillation unit 22 includes an ultrasonic transducer 221, an oscillation rod 222 and a protrusion 223. A plurality of ultrasonic transducers 221 are provided, which are respectively installed on the top of the mixing tank 1 and symmetrically distributed on the outside of the stirring unit 21; the oscillation rod 222 is arranged inside the mixing tank 1 and fixedly connected to the output end of the ultrasonic transducer 221; a plurality of protrusions 223 are provided, which are distributed on the outer wall of the oscillation rod 222; wherein, the ultrasonic transducer 221 is connected to the ultrasonic generator. During the slurry stirring and mixing process, the ultrasonic transducer 221 performs ultrasonic oscillation on the slurry inside the mixing tank 1 through the oscillation rod 222, and increases the contact area with the slurry through multiple protrusions 223, thereby improving the propagation effect of ultrasonic waves in the slurry, and further improving the dispersion efficiency of agglomerates in the slurry.

[0038] In the specific implementation process, it is worth pointing out that in the pulp mixing process, the ultrasonic transducer 221 generates ultrasonic high-frequency vibrations through the oscillation rod 222, and the oscillation rod 222 performs high-frequency vibrations on the pulp inside the mixing tank 1, so that the pulp lumps are quickly decomposed and broken under the action of high-frequency vibrations. At the same time, high-frequency vibrations also help to disperse and rearrange the fibers in the pulp, promote chemical reactions and physical changes in the pulp, improve the uniformity and fineness of the pulp, further improve the performance of the pulp, and further improve the mixing uniformity and mixing efficiency of the pulp. The specific model of the ultrasonic transducer 221 is not limited, and it only needs to meet the use requirements.

[0039] In one practicable manner, see Figure 1 and Figure 2 The scraping unit 23 includes an inclined plate 231 and an inclined plane 232. Two inclined plates 231 are provided, which are symmetrically distributed on both sides of the bottom of the vertical shaft 212 and fixedly connected to the vertical shaft 212; the inclined plane 232 is provided at the top of the outer wall of the inclined plate 231; wherein the inclined plate 231 rotates under the drive of the vertical shaft 212 to scrape the inner wall of the mixing tank 1 to prevent the material from being deposited on the inner wall. At the same time, through the setting of the inclined plane 232, the inclined plate 231 can be made to rotate more smoothly and the resistance during scraping can be reduced.

[0040] In the specific implementation process, it is worth pointing out that during the rotation of the vertical shaft 212, the inclined plate 231 rotates synchronously to scrape the inner wall of the mixing tank 1 to prevent the material from being deposited on the inner wall, thereby further improving the mixing efficiency and mixing quality of the slurry. At the same time, through the setting of the inclined surface 232, the inclined plate 231 can rotate more smoothly and reduce the resistance during scraping.

[0041] In one practicable manner, see Figure 1 , Figure 4 and Figure 5 The sensing component 3 includes a mixing sensing unit 31 and a remaining sensing unit 32. The sensing units 31 are distributed on both sides of the interior of the mixing tank 1; the remaining sensing unit 32 is installed on one side of the bottom of the mixing tank 1; wherein the mixing sensing unit 31 senses the mixing condition of the slurry, and the remaining sensing unit 32 senses the remaining condition during the pulp material conveying process, and transmits the sensing signals to the control system of the equipment respectively, which is beneficial for the staff to grasp the pulp mixing condition, material conveying progress and equipment operation condition.

[0042] In the specific implementation process, it is worth pointing out that the mixing uniformity of the slurry is monitored in real time during the mixing process by the mixing sensing unit 31 to ensure that the slurry reaches an ideal mixing state. At the same time, the residual sensing unit 32 can accurately measure the residual pulp in the mixing tank 1, and provide accurate data support for subsequent pulp transportation and mixing operations, which helps the staff to grasp the pulp mixing situation, material transportation progress and equipment operation status, which not only improves the intelligence level of the pulp mixing equipment, but also makes the entire pulp mixing process more efficient and controllable.

[0043] In one practicable manner, see Figure 1 and Figure 4 The hybrid sensing unit 31 includes a transverse tube 311, a waterproof sleeve 312, a static torque sensor 313, a connecting seat 314 and a sensing rod 315. The transverse tube 311 is provided with two, which are respectively fixedly connected to the two sides of the support seat 211 located at the top; the waterproof sleeve 312 is fixedly connected to the end of the transverse tube 311; the static torque sensor 313 is installed inside the waterproof sleeve 312; the connecting seat 314 is rotatably connected to the inner wall of the waterproof sleeve 312 through a sealed bearing, and is fixedly connected to the static torque sensor 31 3; the sensing rod 315 is fixedly connected to the bottom of the connecting seat 314; wherein, the static torque sensor 313 is installed on both sides of the support seat 211 located at the top through the cross tube 311 and the waterproof sleeve 312. During the slurry mixing process, the sensing rod 315 is impacted by the agglomerates in the slurry, and the impact force is transmitted to the sensing end of the static torque sensor 313 through the connecting seat 314, and the sensing signal is transmitted to the control system of the equipment, and the control system realizes the analysis of the slurry mixing situation through the torque data change.

[0044] In the specific implementation process, it is worth pointing out that during the slurry mixing process, the slurry rotates under the action of the spiral blade 213, and the sensing rod 315 is impacted by the slurry. The impact force is transmitted to the sensing end of the static torque sensor 313 through the connecting seat 314, and the sensing signal is transmitted to the control system of the equipment. The mixing condition of the slurry is analyzed by the change of torque data. When there are a large number of lumps in the slurry, the torque data sensed by the static torque sensor 313 fluctuates greatly. When the torque data remains stable, the slurry is mixed more evenly, and real-time monitoring of the slurry mixing progress is achieved. There is no need to sample the pulp multiple times, which reduces manual intervention and makes the pulp mixing process more automated and intelligent. The specific model of the static torque sensor 313 is not limited, and it only needs to meet the usage requirements.

[0045] In one practicable manner, see Figure 1 and Figure 5The remaining amount sensing unit 32 includes a sensing tube 321, a cover plate 322, a PVC sealing pad 323, a conductive medium 324 and a pressure sensor 325. The sensing tube 321 is installed at the bottom of one side of the mixing tank 1 and passes through the mixing tank 1; the cover plate 322 is fixedly connected to the open end of the sensing tube 321; the PVC sealing pad 323 is arranged on the side where the sensing tube 321 and the cover plate 322 are close to each other; the conductive medium 324 is arranged inside the sensing tube 321; the pressure sensor 325 is installed at the bottom of the sensing tube 321; wherein, the pulp in the mixing tank 1 applies pressure to the PVC sealing pad 323, and transmits the pressure to the pressure sensor 325 through the conductive medium 324, and the pressure sensor 325 transmits the sensing signal to the control system of the equipment. When the slurry is input or output, the control system realizes the analysis and measurement of the slurry remaining amount through the pressure data change.

[0046] In the specific implementation process, it is worth pointing out that the sensing tube 321 is installed on one side of the bottom of the mixing tank 1, and the open end of the sensing tube 321 is closed by using the cover plate 322 and the PVC sealing gasket 323, and a through hole is provided at the center of the cover plate 322, so that the pulp in the mixing tank 1 can apply pressure to the PVC sealing gasket 323 through the through hole, and transmit the pressure to the pressure sensor 325 through the conductive medium 324, and the pressure sensor 325 transmits the sensing signal to the control system of the equipment, and the control system analyzes and measures the remaining amount of pulp in the mixing tank 1 according to the received pressure data. When the pulp is input or output, the control system realizes the analysis and measurement of the remaining amount of pulp through the change of pressure data, so as to further improve the automation and intelligence level of the pulp mixing equipment. The specific model of the pressure sensor 325 is not limited, and it only needs to meet the use requirements.

[0047] In one practicable manner, see Figure 1 A rotation speed sensor 33 is installed on one side of the support seat 211.

[0048] In the specific implementation process, it is worth pointing out that the speed sensor 33 is used to sense the rotation speed of the vertical shaft 212, and transmit the sensing signal to the control system of the pulp mixing equipment in real time, so that the control system can monitor and adjust the mixing efficiency of the stirring unit 21 according to the speed data of the vertical shaft 212, so as to ensure that the pulp mixing process is stable and efficient. At the same time, when the speed sensor 33 detects that the speed of the vertical shaft 212 is abnormal, the control system can respond in time and take corresponding measures. The specific model of the speed sensor 33 is not limited, and it only needs to meet the use requirements.

[0049] Working principle:

[0050] Renewable natural plants are selected as raw materials, and cellulose and hemicellulose are extracted from them by using advanced extraction technology. The extracted natural fibers are refined to the nanometer level by using nanotechnology, and the nanofibers are chemically modified to introduce environmentally friendly functional groups. The modified nanofibers are added to the papermaking pulp in the mixing tank 1 according to a certain proportion, and the servo motor 4 is turned on by the controller to drive the vertical shaft 212 to drive the spiral blade 213 and the scraper unit 23 to rotate, and the speed of the vertical shaft 212 is adjusted and controlled by the speed data sensed by the speed sensor 33. The pulp is stirred and mixed under the action of the spiral blade 213, and the lumps in the pulp are broken by the dispersing teeth 214 at the bottom of the spiral blade 213;

[0051] At the same time, the ultrasonic transducer 221 performs ultrasonic oscillation on the slurry inside the mixing tank 1 through the oscillation rod 222, further improving the dispersion efficiency of the agglomerates in the slurry, so that the slurry is quickly and evenly mixed, and the inclined plate 231 scrapes the inner wall of the mixing tank 1 to prevent the material from being deposited on the inner wall of the mixing tank 1;

[0052] During the slurry mixing process, the agglomerates in the slurry impact the sensing rod 315, generating torque changes at the connection seat 314 and the static torque sensor 313. The static torque sensor 313 transmits the sensing signal to the control system in real time. The control system determines the mixing condition of the slurry according to the torque data changes. When the torque data remains stable, it is determined that the slurry is mixed uniformly. At this time, the control system controls the servo motor 4 to stop working, completing the slurry mixing operation.

[0053] During the slurry conveying process, the pulp in the mixing tank 1 continuously applies pressure to the PVC sealing pad 323, and transmits the pressure to the pressure sensor 325 through the conductive medium 324. The pressure sensor 325 transmits the sensing signal to the control system in real time. The control system judges the remaining amount of slurry according to the change of pressure data. When the pressure data drops to the preset threshold, the control system closes the discharge valve and waits for the next pulp mixing operation.

[0054] 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 pulp mixing device, comprising a mixing tank, characterized in that: A servo motor is provided on one side of the mixing tank, and the pulp mixing device further comprises: A stirring assembly is installed inside the mixing tank; A sensing component is arranged inside the mixing tank; The stirring component is driven by a servo motor to mix and stir the materials in the mixing tank, and the mixing and conveying conditions of the materials are sensed by the sensing component.

2. A pulp mixing device according to claim 1, characterized in that: The stirring assembly comprises: A stirring unit is arranged inside the mixing tank; An oscillating unit is disposed outside the stirring unit and installed on the top of the mixing tank; A wall scraping unit is arranged at the bottom of the stirring unit; The materials are mixed and stirred by the rotation of the stirring unit and the scraping unit, and the inner wall of the mixing tank is scraped. The oscillation unit performs ultrasonic oscillation during the stirring process to quickly disperse the material lumps.

3. A pulp mixing device according to claim 2, characterized in that: The stirring unit comprises: Two support seats are provided, which are respectively fixedly connected to the top and bottom of the mixing tank; A vertical shaft is rotatably connected to the inner wall of the support base through a sealed bearing, and one end of the bottom extends to the outside of the support base and the mixing tank, and is transmission-connected to the servo motor through a belt and a pulley; A spiral blade fixedly connected to the outer wall of the vertical shaft; Dispersing teeth are arranged on the outer side of the bottom of the spiral blade; The vertical shaft is installed inside the mixing tank through the support seat, and driven by the servo motor to drive the spiral blades and the dispersion teeth to rotate, so as to efficiently rotate and mix the materials inside the mixing tank, and further break up the lumps in the materials through the dispersion teeth, so as to achieve rapid mixing and uniform dispersion of water and slurry.

4. A pulp mixing device according to claim 3, characterized in that: The oscillation unit comprises: A plurality of ultrasonic transducers are provided, which are respectively installed on the top of the mixing tank and symmetrically distributed on the outside of the stirring unit; An oscillating rod, disposed inside the mixing tank and fixedly connected to the output end of the ultrasonic transducer; A plurality of protrusions are provided and distributed on the outer wall of the oscillation rod; Among them, the ultrasonic transducer is connected to the ultrasonic generator. During the slurry stirring and mixing process, the ultrasonic transducer performs ultrasonic oscillation on the slurry inside the mixing tank through the oscillation rod, and increases the contact area with the slurry through the multiple protrusions, thereby improving the propagation effect of ultrasonic waves in the slurry and further improving the dispersion efficiency of agglomerates in the slurry.

5. A pulp mixing device according to claim 4, characterized in that: The wall scraping unit comprises: Two inclined plates are provided, symmetrically distributed on both sides of the bottom of the vertical shaft, and fixedly connected to the vertical shaft; An inclined surface is arranged on the top of the outer wall of the inclined plate; The inclined plate rotates driven by the vertical shaft to scrape the inner wall of the mixing tank to prevent material from being deposited on the inner wall. At the same time, the inclined surface can make the inclined plate rotate more smoothly and reduce the resistance during scraping.

6. A pulp mixing device according to claim 5, characterized in that: The sensing component comprises: Mixing sensing units are distributed on both sides of the mixing tank; A residual amount sensing unit is installed on one side of the bottom of the mixing tank; Among them, the mixing sensing unit senses the mixing condition of the pulp, and the remaining amount sensing unit senses the remaining amount during the pulp material transportation process, and transmits the sensing signals to the control system of the equipment respectively, which is beneficial for the staff to grasp the pulp mixing condition, material transportation progress and equipment operation condition.

7. A pulp mixing device according to claim 6, characterized in that: The hybrid sensing unit comprises: Two transverse tubes are provided and are respectively fixedly connected to two sides of the support seat located at the top; A waterproof sleeve, fixedly connected to the end of the horizontal pipe; Static torque sensor, installed inside the waterproof casing; A connecting seat, rotatably connected to the inner wall of the waterproof casing through a sealing bearing, and fixedly connected to the sensing end of the static torque sensor; A sensing rod, fixedly connected to the bottom of the connecting seat; Among them, the static torque sensor is installed on both sides of the support seat located at the top through the cross tube and the waterproof sleeve. During the slurry mixing process, the sensing rod is impacted by the lumps in the slurry, and the impact force is transmitted to the sensing end of the static torque sensor through the connecting seat, and the sensing signal is transmitted to the control system of the equipment. The control system analyzes the slurry mixing situation through the torque data changes.

8. A pulp mixing device according to claim 7, characterized in that: The remaining capacity sensing unit comprises: A sensing pipe is installed at the bottom of one side of the mixing tank and passes through the mixing tank; A cover plate fixedly connected to the open end of the sensing tube; A PVC sealing pad is arranged on a side where the sensing tube and the cover plate are close to each other; A conductive medium is disposed inside the sensing tube; A pressure sensor is installed at the bottom of the sensing tube; Among them, the pulp in the mixing tank applies pressure to the PVC sealing gasket, and transmits the pressure to the pressure sensor through the conductive medium. The pressure sensor transmits the sensing signal to the control system of the equipment. When the slurry is input or output, the control system realizes the analysis and measurement of the slurry remaining situation through the pressure data change.

9. A pulp mixing device according to claim 8, characterized in that: A rotation speed sensor is installed on one side of the support seat.

10. A pulp mixing method, characterized in that: A pulp mixing device as claimed in any one of claims 1 to 4 is used, which specifically comprises the following steps: S1. Select renewable natural plants as raw materials, extract cellulose and hemicellulose therefrom, perform chemical modification, introduce environmentally friendly functional groups, and add the modified nanofibers to the papermaking pulp in the mixing tank in a certain proportion; S2. Turning on the servo motor through the controller, driving the vertical shaft to drive the spiral blade and the scraping unit to rotate, and adjusting and controlling the speed of the vertical shaft through the speed data sensed by the speed sensor, the slurry is stirred and mixed under the action of the spiral blade, and the agglomerates in the slurry are broken by the dispersing teeth at the bottom of the spiral blade; S3. The ultrasonic transducer performs ultrasonic oscillation on the slurry inside the mixing tank through the oscillating rod, further improving the dispersion efficiency of agglomerates in the slurry, so that the slurry is quickly and evenly mixed; S4. The inclined plate scrapes the inner wall of the mixing tank to prevent the material from being deposited on the inner wall of the mixing tank; S5. During the slurry mixing process, the agglomerates in the slurry impact the sensing rod, generating torque changes at the connecting seat and the static torque sensor. The static torque sensor transmits the sensing signal to the control system in real time. The control system judges the mixing condition of the slurry according to the torque data changes. When the torque data remains stable, it is determined that the slurry is mixed evenly. The control system controls the servo motor to stop working, completing the slurry mixing operation. S6. The pulp in the mixing tank continuously applies pressure to the PVC sealing pad, and transmits the pressure to the pressure sensor through the conductive medium. The pressure sensor transmits the sensing signal to the control system in real time. The control system determines the remaining amount of pulp according to the change of pressure data. When the pressure data drops to a preset threshold, the control system closes the discharge valve and waits for the next pulp mixing operation.

Images