Paper pulp stirring equipment
Through the design of the inclined stirring chamber and eccentric stirring assembly, the problem of uneven mixing of pulp stirring equipment in high concentration liquid is solved, and efficient homogenization and accurate sampling are achieved. The equipment structure is simple and clean.
Patent Information
- Application Number
- CN202422255127.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-09-13
AI Technical Summary
The existing pulp mixing equipment has poor mixing effect in high-concentration and high-viscosity liquids, which easily form vortex and dead zones, and bubbles are trapped, resulting in large sampling errors and unable to provide accurate experimental data.
A tilted stirring chamber and an eccentric agitator assembly are designed. Combined with the cleaning device, the fluid flows from high to low is used to break the flow balance through the eccentric agitator assembly, reduce vortex and bubble traps, and achieve uniform mixing.
It improves the homogenization effect of the pulp and reduces sampling errors. The equipment structure is simple, easy to process and clean, and easy to sample.
Smart Images
Figure CN223233645U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of paper production, in particular to a pulp stirring device. Background Art
[0002] During the pulping and papermaking experiment, the precise detection of pulp concentration and the uniformity of pulp mixing are the basis of the experiment. Pulp freeness, wet weight detection and the process of making hand-sheets all have high requirements for the absolute dry weight of the samples. During the experiment, inaccurate pulp concentration measurement and uneven sample concentration during sampling will cause large fluctuations in the experimental results and cannot provide effective data reference for production. The difference between pulp and ideal liquid is that the flow state of pulp of different concentrations varies greatly. Pulp is mainly a suspension composed of fibers and water, and the viscosity is usually very high, especially concentrated pulp. It is a non-Newtonian fluid, and its fluidity is affected by fibers and solid particles. The flow behavior of pulp is complex and is affected not only by the liquid composition, but also by solid fibers. Aggregation, sedimentation, stratification and other phenomena may occur during flow.
[0003] In the prior art, the stirring containers used for experiments are generally cylindrical, and square containers have dead corners at the corners that are difficult to stir. When stirring a liquid in a cylindrical container, if the stirring paddle is located exactly in the center of the container, the following problems may occur: 1. Poor mixing effect. When the stirring paddle is in the center, it cannot effectively generate sufficient shear force and fluid dynamics, resulting in poor mixing effect, especially in high-concentration, high-viscosity liquids. The central stirring paddle may not be able to generate enough flow to mix the liquid evenly. 2. Eddy currents and dead zones: The stirring paddle in the center will cause uneven liquid flow. In some cases, the stirring paddle in the center may generate eddies at the edge of the container, and the central area of the liquid may form a dead zone, which cannot be fully stirred. 3. Bubble entrapment: When the stirring paddle is in the center of the container, it may cause bubbles to be trapped in the center, especially when there are bubbles on the surface of the liquid. This may prevent the bubbles from escaping effectively, thereby affecting the stirring and mixing effects.
[0004] Therefore, it is necessary to provide a pulp stirring device with a simple structure and the ability to achieve a better homogenization effect to reduce sampling errors based on the pulp characteristics. Utility Model Content
[0005] The purpose of the utility model is to provide a paper pulp stirring device which has a simple structure and can achieve a better homogenization effect so as to reduce sampling errors.
[0006] To achieve the above-mentioned purpose, the utility model provides a pulp stirring device, comprising:
[0007] frame;
[0008] The stirring chamber is tilted on the frame at a preset angle and is provided with a sampling port;
[0009] The stirring device includes a stirring assembly, one end of which is fixed to the frame, and the other end of which is rotatably extended into the stirring chamber and deviated from the center of the stirring chamber;
[0010] The cleaning device is arranged on the frame and comprises a water inlet assembly and a water receiving assembly. The water outlet end of the water inlet assembly is located above the stirring chamber, and the water receiving assembly is located below the stirring chamber.
[0011] By adopting the above technical solution, the pulp mixing equipment of the present invention has a simple structure, is easier to process, and is easy to clean during use. The pulp mixing equipment includes a frame, a mixing chamber, a stirring device, and a cleaning device mounted on the frame. The mixing chamber is tilted on the frame. Due to the characteristic of fluid flow from high to low, the slurry in the mixing chamber automatically flows from a high position to a low position. Furthermore, the stirring device includes a stirring assembly, which is eccentrically positioned within the mixing chamber to better disrupt the flow balance of the slurry within the mixing chamber, thereby preventing the flow around the stirring assembly from forming a uniform laminar flow and affecting the uniformity of the slurry mixing. The stirring assembly is positioned at a relatively high position within the mixing chamber. After stirring the slurry, the slurry flows to a low position. At the low position, the slurry is not stirred by the stirring assembly and is more stable, making it easier to sample the slurry at the tilted low position. Driven by the stirring assembly, the pulp flows outward from the mixing chamber. When it reaches the rounded corners of the rectangle, it is forcibly disrupted and then continues to flow, achieving the purpose of homogenization through continuous circulation. At the same time, the eccentric arrangement of the stirring assembly reduces the generation of eddies and dead zones when the stirring shaft speed is reduced, and also reduces the entrapment of bubbles in the stirring center. In addition, the cleaning device includes a water inlet assembly and a water receiving assembly. The water inlet assembly can easily release water from the top to clean the stirring chamber, and then the cleaned liquid can be discharged into the water receiving assembly through the sampling port for further processing. The pulp stirring equipment of the present invention has a simple structure, is easier to process, is easy to clean during use, has a good homogenization effect, has a small sampling error, and is convenient for sampling.
[0012] Preferably, the stirring assembly includes a stirring shaft and a stirring plate connected to the stirring shaft, and stirring plates are provided on both sides of the stirring shaft.
[0013] Preferably, the stirring plate is in a rectangular parallelepiped shape.
[0014] Preferably, the frame includes a base, and a supporting frame and a fixing frame arranged on the base, the supporting frame is used to support the stirring chamber, and the fixing frame is used to install the stirring device, and the supporting frame and the fixing frame are both arranged on the base at an inclined angle according to a preset angle.
[0015] Preferably, the stirring device includes a power component, and the stirring component is arranged at the output end of the power component.
[0016] Preferably, the bottom surface of the stirring chamber includes a relatively high position and a low position, the high position is arranged on the support frame, and the low position is away from the support frame. The sampling port is opened at the low position of the bottom surface, and the sampling port is provided with a first valve that can be opened and closed.
[0017] Preferably, the stirring chamber is a columnar structure with a rounded rectangular cross section.
[0018] Preferably, the water inlet assembly includes a water inlet pipe and a switch for opening and closing the water inlet pipe, the water inlet pipe is connected to the switch and the water outlet end of the water inlet pipe is located above the mixing chamber.
[0019] Preferably, the water receiving assembly includes a water receiving trough, the bottom of the water receiving trough is a cone structure, the bottom of the cone structure is provided with a water outlet for discharging water, and the water outlet is provided with a second valve that can be opened and closed.
[0020] Preferably, the water receiving assembly further includes a grid baffle, which is arranged on the water receiving trough. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0022] Figure 1 It is a structural diagram of a pulp stirring device provided in one embodiment of the utility model.
[0023] Figure 2 yes Figure 1 Structural diagram from another angle.
[0024] Figure 3 yes Figure 1 Structural diagram with the side panels removed.
[0025] Figure 4 yes Figure 1 Structural diagram of the middle support frame, fixed frame and stirring assembly.
[0026] Description of reference numerals:
[0027] 100. Pulp mixing equipment; 101. Frame; 102. Support frame; 103. Fixed frame; 104. Connecting plate; 105. Base;
[0028] 10. Mixing chamber; 11. Accommodating chamber; 12. Sampling port; 13. First valve; 14. Chamfered portion; 15. High position; 16. Low position;
[0029] 20. Stirring device; 21. Stirring assembly; 211. Stirring shaft; 212. Stirring plate; 22. Power assembly; 221. Motor; 222. Reducer;
[0030] 30. Cleaning device; 31. Water inlet assembly; 311. Water inlet pipe; 312. Switch; 313. Water outlet; 32. Water receiving assembly; 321. Water receiving trough; 322. Water outlet; 323. Second valve; 324. Grid baffle. DETAILED DESCRIPTION
[0031] In order to explain the technical content and structural features of the present invention in detail, the following is a further description in conjunction with the embodiments and the accompanying drawings.
[0032] See also Figure 1 and Figure 2 The utility model provides a pulp mixing device 100, comprising a frame 101 and a mixing chamber 10 and a mixing device 20 arranged on the frame 101. The mixing chamber 10 is tilted on the frame 101 at a preset angle and is provided with a sampling port 12. The tilted mixing chamber 10 cooperates with the mixing device 20 to better perform homogenization and sampling. The mixing device 20 includes a mixing component 21, one end of the mixing component 21 is fixed on the frame 101, and the other end is rotatably extended into the mixing chamber 10. The mixing component 21 deviates from the center position of the mixing chamber 10, that is, the mixing component 21 is eccentrically arranged in the mixing chamber 10, so as to better homogenize the material and break the flow balance of the slurry in the mixing chamber 10. The cleaning device 30 is arranged on the frame 101, and comprises a water inlet component 31 and a water receiving component 32. The water outlet end 313 of the water inlet component 31 is located above the mixing chamber 10, so as to facilitate the release of water into the mixing chamber 10 to clean the mixing chamber 10. The water receiving assembly 32 is located below the stirring chamber 10 and is used to receive the liquid after cleaning so as to facilitate further processing of the liquid after cleaning.
[0033] After adopting the above technical solution, the pulp stirring device 100 of the utility model has a simple equipment structure, is easier to process, and is easy to clean during use. The pulp stirring device 100 includes a frame 101 and a stirring chamber 10, a stirring device 20 and a cleaning device 30 arranged on the frame 101. The stirring chamber 10 is tilted on the frame 101. According to the characteristic of the fluid flowing from high to low, the slurry in the stirring chamber 10 will automatically flow from the inclined high position 15 to the low position 16. On the other hand, the stirring device 20 includes a stirring component 21. The stirring component 21 is eccentrically arranged in the stirring chamber 10, which can better break the flow balance of the slurry in the stirring chamber 10, so as to avoid the flow trend around the stirring component 21 being consistent and forming a laminar flow, which affects the uniformity of the slurry mixing. The stirring component 21 is arranged at a relatively high position 15 in the stirring chamber 10. After the slurry is stirred, the slurry flows to the low position 16. The slurry is not stirred by the stirring component 21 at the low position 16, and tends to be in a more stable state, so that the slurry can be better sampled at the inclined low position 16. The pulp flows to the outside of the stirring chamber 10 under the drive of the stirring component 21 in the stirring chamber 10. When it reaches the rectangular corner, it is forced to be disturbed and then continues to flow, and the purpose of homogenization is achieved through continuous circulation. At the same time, the stirring component 21 is eccentrically arranged, which reduces the generation of vortices and dead zones when reducing the rotation speed of the stirring shaft 211, and also reduces the entrapment of bubbles in the stirring center. In addition, the cleaning device 30 includes a water inlet component 31 and a water receiving component 32. The water inlet component 31 can easily release water from the top to clean the stirring chamber 10, and then the cleaned liquid can be discharged into the water receiving component 32 through the sampling port 12 for further processing. The pulp stirring equipment 100 of the present invention has a simple equipment structure, is easier to process, is easy to clean during use, has a good homogenization effect, has a small sampling error, and is convenient for sampling.
[0034] See also Figure 2 and Figure 4 In some optional embodiments, the stirring assembly 21 includes a stirring shaft 211 and a stirring plate 212 connected to the stirring shaft 211, and stirring plates 212 are provided on both sides of the stirring shaft 211. The two stirring plates 212 are integrally formed with the stirring shaft 211, or the two stirring plates 212 are respectively connected to the stirring shaft 211. Among them, the stirring plate 212 is in the shape of a rectangular parallelepiped, so that the stirring plate 212 has a larger contact area with the slurry and can better stir the slurry. Since the slurry is a suspension composed of fibers and water, the viscosity is usually very high, especially for thick pulp, which is a non-Newtonian fluid and its fluidity is affected by fibers and solid particles. The flow behavior of pulp is complex and is affected not only by the liquid components but also by the solid fibers. Aggregation, sedimentation, stratification and the like may occur during flow. Ordinary propeller-shaped stirrers are difficult to stir the slurry. The structure of the stirring shaft 211 plus the stirring plate 212 can better contact the slurry and stir the slurry.
[0035] See also Figure 3 and Figure 4 In some optional embodiments, the frame 101 includes a base 105, a support frame 102, a fixed frame 103 and a connecting plate 104. The support frame 102 and the fixed frame 103 are arranged on the base 105 through the connecting plate 104. Specifically, the support frame 102 is used to support the stirring chamber 10, and the fixed frame 103 is used to install the stirring device 20. The support frame 102 and the fixed frame 103 are both inclined at a preset angle on the connecting plate 104 and are arranged on the base 105 through the connecting plate 104. Among them, the inclination angles of the bottom plates of the support frame 102 and the fixed frame 103 are substantially the same, and the support frame 102 and the fixed frame 103 are substantially parallel.
[0036] See also Figure 3 and Figure 4 In some optional embodiments, the stirring device 20 includes a power assembly 22, and the stirring assembly 21 is disposed at the output end of the power assembly 22. The power assembly 22 includes a motor 221 and a reducer 222. The reducer 222 cooperates with the motor 221 to reduce the rotation speed of the stirring shaft 211, thereby reducing the generation of eddies and dead zones and reducing the entrapment of bubbles in the stirring center.
[0037] See also Figure 3 and Figure 4 In some optional embodiments, the stirring chamber 10 is tilted so that its bottom surface has a relatively high position 15 and a low position 16. The high position 15 is arranged on the support frame 102, and the low position 16 is away from the support frame 102. It can be understood that since the support frame 102 is tilted, the stirring chamber 10 is arranged on the support frame 102, so that the stirring chamber 10 is also tilted. According to the characteristic of fluid flowing from high to low, the slurry will automatically flow from the high position 15 to the low position 16 in the stirring chamber 10, and the sampling port 12 is opened at the low position 16 on the bottom surface, which is more convenient for sampling. On the other hand, the stirring component 21 is arranged at a relatively high position 15 in the stirring chamber 10. After the slurry is stirred, the slurry flows to the low position 16. The slurry is not stirred by the stirring component 21 at the low position 16, and is more stable, with a better material mixing effect, so that the slurry can be better sampled at the tilted low position 16. Specifically, a first valve 13 is provided on the sampling port 12, which can be opened and closed by the first valve 13. The sampling port 12 is not only used for taking samples, but also for discharging liquid after cleaning. The sampling port 12 is located at a low position 16 to ensure that the material and liquid in the mixing chamber 10 are discharged cleanly.
[0038] See also Figure 2In some optional embodiments, the stirring chamber 10 is a columnar structure with a rounded rectangular cross section. The stirring chamber 10 has a hollow accommodating chamber 11, and the stirring assembly 21 is arranged in the accommodating chamber 11 for stirring the slurry in the accommodating chamber 11 so that the slurry is evenly mixed. The stirring chamber 10 is a rectangular parallelepiped structure, and chamfered portions 14 are provided at the four corners of the stirring chamber 10 so that the cross section of the stirring chamber 10 is a rounded rectangular. It can be understood that the cylindrical structure has the same side surfaces and the same flow trend all around. During stirring, laminar flow is easily formed, and the balance of flow is prone to produce vortices and easily bring in bubbles. The rectangular parallelepiped structure will force the flow to continue at the corners, and will not form laminar flow and vortices, which can better circulate the slurry.
[0039] See also Figure 1 and Figure 2 In some optional embodiments, the water inlet assembly 31 includes a water inlet pipe 311 and a switch 312 for opening and closing the water inlet pipe 311. The water inlet pipe 311 is connected to the switch 312, and a water outlet end 313 of the water inlet pipe 311 is located above the mixing chamber 10. After the mixing is completed, the switch 312 can be used to control the water outlet end 313 above the mixing chamber 10 to discharge water or cleaning liquid into the mixing chamber 10. At this time, the mixing assembly 21 can be started to mix and clean, thereby cleaning the entire mixing chamber 10.
[0040] See also Figures 1 to 4 In some optional embodiments, the water receiving component 32 includes a water receiving trough 321, and the bottom of the water receiving trough 321 is a cone structure, so as to better drain the liquid and facilitate discharge. Among them, a water outlet 322 for water discharge is provided at the bottom of the cone structure, and a second valve 323 that can be opened and closed is provided on the water outlet 322. By opening the second valve 323, the liquid in the water receiving trough 321 can be discharged. On the other hand, the water receiving component 32 also includes a grid baffle 324, and the grid baffle 324 is provided on the water receiving trough 321. The mesh density of the grid baffle 324 can be set according to actual use requirements. The grid baffle 324 can be used to receive fibers in the slurry, and the cleaning effect is better.
[0041] like Figures 1 to 4As shown, the pulp mixing device 100 of the present invention has a simple structure, is easy to form, and is easy to clean during use. The pulp mixing device 100 includes a frame 101 and a mixing chamber 10, a mixing device 20, and a cleaning device 30 arranged on the frame 101. The mixing chamber 10 is tilted on the frame 101. According to the characteristic of the fluid flowing from high to low, the slurry in the mixing chamber 10 will automatically flow from the tilted high position 15 to the low position 16. On the other hand, the mixing device 20 includes a mixing component 21. The mixing component 21 is eccentrically arranged in the mixing chamber 10, which can better break the flow balance of the slurry in the mixing chamber 10, so as to avoid the flow trend around the mixing component 21 being consistent and forming a laminar flow, which affects the uniformity of the slurry mixing. The mixing component 21 is arranged at a relatively high position 15 in the mixing chamber 10. After the slurry is stirred, the slurry flows to the low position 16. The slurry is not stirred by the stirring component 21 at the low position 16, and tends to be in a more stable state, so that the slurry can be better sampled at the inclined low position 16. The pulp flows to the outside of the stirring chamber 10 under the drive of the stirring component 21 in the stirring chamber 10. When it reaches the rectangular corner, it is forced to be disturbed and then continues to flow, and the purpose of homogenization is achieved through continuous circulation. At the same time, the stirring component 21 is eccentrically arranged, which reduces the generation of vortices and dead zones when reducing the rotation speed of the stirring shaft 211, and also reduces the entrapment of bubbles in the stirring center. In addition, the cleaning device 30 includes a water inlet component 31 and a water receiving component 32. The water inlet component 31 can easily release water from the top to clean the stirring chamber 10, and then the cleaned liquid can be discharged into the water receiving component 32 through the sampling port 12 for further processing. The pulp stirring equipment 100 of the present invention has a simple equipment structure, is easier to process, is easy to clean during use, has a good homogenization effect, has a small sampling error, and is convenient for sampling.
[0042] The above disclosure is only a preferred embodiment of the present invention and cannot be used to limit the scope of the rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are all within the scope covered by the present invention.
Claims
1. A pulp stirring device, characterized in that: include: frame; a stirring chamber, which is tilted on the frame at a preset angle and provided with a sampling port; A stirring device, comprising a stirring assembly, one end of the stirring assembly being fixed to the frame, and the other end of the stirring assembly being rotatably extended into the stirring chamber and offset from the center of the stirring chamber; The cleaning device is arranged on the frame and includes a water inlet component and a water receiving component. The water outlet end of the water inlet component is located above the stirring chamber, and the water receiving component is located below the stirring chamber.
2. The pulp stirring device according to claim 1, characterized in that: The stirring assembly includes a stirring shaft and a stirring plate connected to the stirring shaft, and the stirring plates are arranged on both sides of the stirring shaft.
3. The pulp stirring device according to claim 2, characterized in that: The stirring plate is in a rectangular parallelepiped shape.
4. The pulp stirring device according to claim 1, characterized in that: The frame includes a base, and a supporting frame and a fixing frame arranged on the base, the supporting frame is used to support the stirring chamber, and the fixing frame is used to install the stirring device. The supporting frame and the fixing frame are both arranged on the base at an inclined angle according to the preset angle.
5. The pulp stirring device according to claim 4, characterized in that: The stirring device includes a power component, and the stirring component is arranged at the output end of the power component.
6. The pulp stirring device according to claim 4, characterized in that: The bottom surface of the stirring chamber includes a high position and a low position relatively set, the high position is set on the support frame, and the low position is away from the support frame. The sampling port is opened at the low position of the bottom surface, and the sampling port is provided with a first valve that can be opened and closed.
7. The pulp stirring device according to claim 1, characterized in that: The stirring chamber is a columnar structure with a rounded rectangular cross section.
8. The pulp stirring device according to claim 1, characterized in that: The water inlet assembly includes a water inlet pipe and a switch for opening and closing the water inlet pipe. The water inlet pipe is connected to the switch and the water outlet end of the water inlet pipe is located above the mixing chamber.
9. The pulp stirring device according to claim 1, characterized in that: The water receiving assembly includes a water receiving trough, the bottom of the water receiving trough is a cone structure, the bottom of the cone structure is provided with a water outlet for discharging water, and the water outlet is provided with a second valve that can be opened and closed.
10. The pulp stirring device according to claim 9, characterized in that: The water receiving assembly further comprises a grid baffle, and the grid baffle is arranged on the water receiving trough.