Bleaching and washing equipment for paper pulp papermaking
By designing a bleaching and washing equipment for pulp and paper making that includes a lifting mechanism, a stirring mechanism, a scraper and a breaking mechanism, the problem of uneven stirring effect and inability to break up the bonded pulp in the existing equipment is solved, and more efficient bleaching effect and lower pulp waste are achieved.
Patent Information
- Application Number
- CN202421808253.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-29
AI Technical Summary
The existing bleaching and washing equipment for pulp and paper production has uneven effect during the stirring and mixing process, and cannot effectively dissipate the bonded pulp, resulting in poor bleaching effect. The equipment does not have the function of scraping off sticky pulp on the inner wall of the bleach can, which affects the post-cleaning and pulp utilization rate.
A bleaching and washing equipment including a support frame, a bleaching can, a lifting mechanism, a mixing mechanism, a scraper and a breaking mechanism is designed. The lifting mechanism controls the up and down movement of the components of the scraper and the stirring mechanism to achieve rapid reciprocating and lifting mixing; at the same time, the scraper is used to scrape off the sticky pulp on the inner wall of the bleaching can, and the breaking mechanism is used to break and separate the bonded pulp.
The uniform mixing of pulp and bleaching agent is achieved, the bleaching effect and efficiency is improved, the pulp waste is reduced, the post-cleaning process is simplified, and the equipment is improved.
Smart Images
Figure CN222861947U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pulp and paper making, in particular to a bleaching and washing device for pulp and paper making. Background Art
[0002] The modern papermaking process can be divided into pulping, modulation, papermaking, processing and other main steps. Pulping is the first step in papermaking. Generally, there are three methods to convert wood into pulp: mechanical pulping, chemical pulping and semi-chemical pulping. In order to further improve the optical properties of pulp, the pulp generally needs to be bleached and washed during the pulping process. The raw material for papermaking is mainly fiber. The main principle of bleaching is to further remove residual lignin in the pulp or change the chromophore structure of lignin through chemicals, thereby improving the overall whiteness of the pulp.
[0003] At present, some existing bleaching and washing equipment for pulp and paper production generally adopts the method of adding bleaching agent and stirring and mixing to bleach the pulp. The traditional stirring and mixing method has poor mixing effect, which may cause uneven mixing of pulp and bleaching agent, affecting the bleaching effect, low efficiency, and cannot scrape off the pulp stuck on the inner wall of the bleaching tank, which is not only inconvenient for later cleaning, but also causes waste of pulp, greatly reduces the quality of pulp bleaching, and the pulp will be squeezed when screening and purifying the pulp, and part of the pulp will stick together into blocks. Some existing bleaching and washing equipment for pulp and paper production does not have the function of breaking up the material, and cannot control the size of the pulp debris. The surface of the sticky pulp part cannot fully contact and react with the bleaching agent, which will cause uneven pulp bleaching and poor bleaching effect. Utility Model Content
[0004] The purpose of the utility model is to provide a bleaching and washing device for pulp and paper making to solve the problems raised in the above background technology.
[0005] To achieve the above object, the utility model provides the following technical solution: a bleaching and washing device for pulp and papermaking, comprising a support frame and a bleaching tank fixed inside the support frame, and also comprising:
[0006] A discharge pipe connected to one side of the bottom of the bleaching tank, one side of the bleaching tank is connected to a mounting shell, a lifting mechanism is arranged inside the mounting shell, a stirring mechanism is arranged in the middle of the bleaching tank, a scraper is slidably connected to the inner wall of the bleaching tank, and a guide groove is opened on one side of the inner wall of the bleaching tank;
[0007] A guide block slides inside the guide groove, one side of the top of the bleaching tank is connected to a feeding shell, the upper part of one side of the inner wall of the feeding shell is fixedly connected with a guide block, and a scattering mechanism is arranged below the inside of the feeding shell.
[0008] Preferably, the lifting mechanism includes a servo motor installed on one side of the mounting shell and a gear fixed to one side of the output shaft of the servo motor, one side of the gear surface is meshed with a rack plate, and the rack plate is fixedly connected to the other side of the scraper.
[0009] Preferably, the stirring mechanism comprises a reciprocating threaded rod fixed in the middle of the bleaching tank and a movable sleeve threaded on the surface of the reciprocating threaded rod, a stirring blade is fixedly connected in the middle of the surface of the movable sleeve, and the movable sleeve is located in the middle part of the scraper.
[0010] Preferably, the breaking up mechanism includes a stepper motor installed at the bottom of one side of the feeding shell and a linkage assembly installed at one side of the output shaft of the stepper motor, one side of the active belt pulley of the linkage assembly is fixedly connected to a auger, one side of the driven belt pulley of the linkage assembly is fixedly connected to a beating roller, and one side of the surface of the beating roller passes through the guide block and is rotatably connected to it.
[0011] Preferably, the scraper is annular in shape, and there are two scrapers parallel to each other.
[0012] Preferably, the rack plate is fixedly connected to the other side of the scraper plate, and the rack plate is slidably connected to the inner wall of the mounting shell.
[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0014] The utility model controls the scraper and drives the parts of the stirring mechanism to move up and down through the lifting mechanism, and the parts of the stirring mechanism perform reciprocating lifting and lowering motion, so that the put-in bleaching agent and paper pulp can be quickly reciprocated and lifted in a mixed and stirred manner, so that the mixing effect is uniform and the efficiency is high, and the bleaching quality is improved. At the same time, the scraper scrapes off the paper pulp adhered to the inner wall of the bleaching tank, so as to avoid inconvenience in later cleaning and reduce the waste of paper pulp. Before the paper pulp is sent into the bleaching tank, the pulp is broken up and separated by the breaking up mechanism, so that the paper pulp is fully in contact with the bleaching agent, and the bleaching effect is improved, which solves the problem that some current bleaching and washing equipment have poor stirring effect and lack of breaking up function when in use. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;
[0016] Figure 2 It is a structural schematic diagram of the lifting mechanism and the stirring mechanism in the utility model;
[0017] Figure 3 It is a schematic diagram of a partial three-dimensional structure from another viewing angle of the utility model;
[0018] Figure 4 It is a structural schematic diagram of the dispersing mechanism in the utility model.
[0019] In the figure: 1. support frame; 2. bleaching tank; 3. discharge pipe; 4. mounting shell; 5. lifting mechanism; 51. servo motor; 52. gear; 53. rack plate; 6. stirring mechanism; 61. reciprocating threaded rod; 62. movable sleeve; 63. stirring blade; 7. scraper; 8. guide groove; 9. guide block; 10. feeding shell; 11. guide block; 12. scattering mechanism; 121. stepping motor; 122. linkage assembly; 123. auger; 124. beating roller. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] See also Figure 1-4As shown, a bleaching and washing device for pulp and papermaking comprises a support frame 1, the support frame 1 is used to support the device as a whole, the inner wall of the support frame 1 is fixedly connected with a bleaching tank 2, the bleaching tank 2 is used for the working process of bleaching and washing pulp, one side of the bottom of the bleaching tank 2 is connected with a discharge pipe 3, the discharge pipe 3 is used to discharge the bleached pulp inside the bleaching tank 2, so as to facilitate the next step of operation, one side of the bleaching tank 2 is connected with a mounting shell 4, the mounting shell 4 is used to mount parts, the bottom of the mounting shell 4 is a closed setting to prevent the liquid inside the bleaching tank 2 from flowing to the outside of the working chamber, the mounting shell 4 is used to position the parts and guide the internal parts, and the interior of the mounting shell 4 is provided with a lifting mechanism 5, the lifting mechanism 5 The lowering mechanism 5 is used to control the parts inside the bleaching tank 2 to move up and down, so as to control the parts inside the bleaching tank 2 to mix and stir the pulp and the bleaching agent, thereby improving the bleaching efficiency. A stirring mechanism 6 is arranged in the middle of the bleaching tank 2. The stirring mechanism 6 is used in conjunction with the lifting mechanism 5, and the lifting mechanism 5 provides the power for stirring. The stirring mechanism 6 is used to evenly mix the pulp and the bleaching agent inside the bleaching tank 2, and the rapid reciprocating lifting and lowering mixing and stirring makes the mixing effect uniform, improves the work efficiency, and greatly improves the bleaching quality. The inner wall of the bleaching tank 2 is slidably connected with a scraper 7. The shape of the scraper 7 is annular. There are two scrapers 7 and their positions are parallel to each other. The scraper 7 is used to move the bleaching tank 2. 2, the sticky pulp residue on the inner wall surface can be scraped off to avoid inconvenience in later cleaning, reduce pulp waste, and improve the use effect. A guide groove 8 is provided on one side of the inner wall of the bleaching tank 2. The positions of the guide groove 8 and the lifting mechanism 5 are symmetrical. The lifting mechanism 5 and the guide groove 8 are respectively located on both sides of the scraper 7. A guide block 9 is slidably connected inside the guide groove 8. The guide block 9 is fixedly connected to one side of the scraper 7. The guide block 9 and the guide groove 8 are used together to guide the scraper 7 when the lifting mechanism 5 drives the scraper 7 to move, improve the stability of the scraper 7 when lifting, and help the scraper 7 to scrape the pulp residue smoothly. One side of the top of the bleaching tank 2 is connected with a feeding shell 10, which is used to Unbleached pulp is fed in, and the top shape of the feeding shell 10 is an inverted eight-shaped setting, which is convenient for the pulp to enter. A guide block 11 is fixedly connected to the upper side of the inner wall of the feeding shell 10, and the top of the guide block 11 is inclined. The guide block 11 is used to limit the flow range of the pulp and guide the pulp entering the feeding shell 10, so as to facilitate the concentrated breaking of the pulp. A breaking mechanism 12 is provided at the lower part of the feeding shell 10. The breaking mechanism 12 is located at the lower part of the feeding shell 10 and is used in conjunction with the guide block 11. The breaking mechanism 12 is used to break up and separate the pulp that is stuck together, so as to avoid uneven contact between the inside of the pulp stuck together and the bleaching agent, which affects the bleaching effect and improves the use effect.
[0022] The lifting mechanism 5 includes a servo motor 51 installed on one side of the mounting shell 4. The rotation direction of the servo motor 51 is intermittent opposite rotation, and it rotates in two directions in turn, and rotates cyclically and staggeredly. The output shaft of the servo motor 51 passes through the mounting shell 4 and is fixedly connected with a gear 52. The gear 52 is rotatably connected to the inner wall of the mounting shell 4. One side of the surface of the gear 52 is meshed with a rack plate 53, and the rack plate 53 is fixedly connected to the other side of the scraper 7. The rack plate 53 is slidably connected to the inner wall of the mounting shell 4. When the pulp enters the bleaching tank 2 for bleaching, the gear 52 is controlled to rotate by the servo motor 51, and the gear 52 is meshed with the rack plate 53 for transmission, thereby driving the scraper 7 to move up and down in the bleaching tank 2, and the pulp adhered to the inner wall of the bleaching tank 2 is scraped off, so as to avoid inconvenience in the later cleaning, reduce the waste of pulp, and improve the bleaching effect of the pulp. At the same time, the scraper 7 drives the components of the stirring mechanism 6 to move synchronously to stir the pulp and the bleaching agent, thereby improving the use effect.
[0023] The stirring mechanism 6 includes a reciprocating threaded rod 61 fixed in the middle of the bleaching tank 2, and a movable sleeve 62 is threadedly connected to the surface of the reciprocating threaded rod 61. The scraper 7 is rotatably connected to the upper and lower surfaces of the movable sleeve 62 respectively, and a stirring blade 63 is fixedly connected to the middle of the surface of the movable sleeve 62. The movable sleeve 62 is located in the middle part of the scraper 7. When the lifting mechanism 5 controls the scraper 7 to move up and down, it drives the gear 52 to move up and down along the surface of the reciprocating threaded rod 61. The movable sleeve 62 is threadedly connected to the reciprocating threaded rod 61, and when the movable sleeve 62 moves, the stirring blade 63 is driven to rotate. The stirring blade 63 rotates and performs a reciprocating lifting motion, thereby being able to quickly reciprocate and lift the input bleaching agent and pulp for mixing and stirring, so that the mixing is more uniform, the bleaching efficiency is improved, and the bleaching quality is greatly improved.
[0024] The breaking mechanism 12 includes a stepper motor 121 installed at the lower side of the feeding shell 10, and a linkage assembly 122 is installed on one side of the output shaft of the stepper motor 121. The linkage assembly 122 is composed of a driving belt pulley, a belt and a driven belt pulley. A screw 123 is fixedly connected to one side of the driving belt pulley of the linkage assembly 122. The screw 123 is located at the lower part of the feeding shell 10. One end of the screw 123 is rotatably connected to the lower part of the inner wall of the feeding shell 10. A material beating roller 124 is fixedly connected to one side of the driven belt pulley of the linkage assembly 122. One side of the surface of the material beating roller 124 penetrates the guide block 11 and is rotatably connected thereto. A rotating rod is fixed on the other side of the surface of the beating roller 124, and the side of the beating roller 124 used for breaking up is located on one side of the guide block 11. When the pulp is conveyed to the inside of the feeding shell 10, the stepping motor 121 and the linkage assembly 122 are linked to control the auger 123 and the beating roller 124 to rotate synchronously, and the pulp is preliminarily broken up by the rotating rod on the surface of the beating roller 124 to separate the agglomerated pulp and reduce the volume of individual pulps. Subsequently, the pulp is conveyed in an orderly manner through the auger 123. During the conveying, the pulps can be further separated from each other to facilitate uniform contact between the pulp and the bleaching agent, thereby improving the bleaching effect.
[0025] Working principle: First, put the bleaching agent into the bleaching tank 2, then turn on the stepper motor 121, and control the auger 123 and the beating roller 124 to rotate synchronously through the stepper motor 121 and the linkage assembly 122, and then feed the pulp to be bleached into the feeding shell 10, and the pulp flows to the side of the beating roller 124 fixed with a rotating rod through the guide block 11, and the pulp is preliminarily broken up by the beating roller 124, and then the pulp falls into the inside of one side of the auger 123, and is transmitted to the feeding shell 10 through the auger 123. 0, after the pulp is transferred to the bleaching tank 2, the servo motor 51 is turned on, and the gear 52 and the rack plate 53 are meshed and driven by the servo motor 51, and the scraper 7 is driven to move up and down by the rack plate 53. When the scraper 7 moves, the gear 52 is threadedly connected with the servo motor 51 to rotate, and the stirring blade 63 is driven to rotate synchronously. When the stirring blade 63 rotates, it reciprocates and lifts, and performs rapid reciprocating lifting mixing and stirring. After bleaching is completed, the pulp can be discharged through the discharge pipe 3.
[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including 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 device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.
[0027] 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 bleaching and washing device for pulp and paper making, comprising a support frame (1) and a bleaching tank (2) fixed inside the support frame (1), characterized in that: Also includes: A discharge pipe (3) is connected to one side of the bottom of the bleaching tank (2); one side of the bleaching tank (2) is connected to a mounting shell (4); a lifting mechanism (5) is provided inside the mounting shell (4); a stirring mechanism (6) is provided in the middle of the bleaching tank (2); a scraper (7) is slidably connected to the inner wall of the bleaching tank (2); and a guide groove (8) is provided on one side of the inner wall of the bleaching tank (2); A guide block (9) slides inside the guide groove (8); one side of the top of the bleaching tank (2) is connected to a feeding shell (10); a guide block (11) is fixedly connected to the upper side of one side of the inner wall of the feeding shell (10); and a scattering mechanism (12) is provided at the lower side of the inside of the feeding shell (10).
2. A bleaching and washing equipment for pulp and papermaking according to claim 1, characterized in that: The lifting mechanism (5) comprises a servo motor (51) mounted on one side of the mounting shell (4) and a gear (52) fixed to one side of the output shaft of the servo motor (51); a rack plate (53) is meshed on one side of the surface of the gear (52); and the rack plate (53) is fixedly connected to the other side of the scraper (7).
3. A bleaching and washing equipment for pulp and papermaking according to claim 1, characterized in that: The stirring mechanism (6) comprises a reciprocating threaded rod (61) fixed in the middle of the bleaching tank (2) and a movable sleeve (62) threaded on the surface of the reciprocating threaded rod (61), a stirring blade (63) is fixedly connected in the middle of the surface of the movable sleeve (62), and the movable sleeve (62) is located in the middle part of the scraper (7).
4. A bleaching and washing equipment for pulp and papermaking according to claim 1, characterized in that: The scattering mechanism (12) comprises a stepper motor (121) installed below one side of the feeding shell (10) and a linkage assembly (122) installed on one side of the output shaft of the stepper motor (121); a screw auger (123) is fixedly connected to one side of the driving belt pulley of the linkage assembly (122); a material beating roller (124) is fixedly connected to one side of the driven belt pulley of the linkage assembly (122); and one side of the surface of the material beating roller (124) penetrates the guide block (11) and is rotatably connected thereto.
5. The bleaching and washing equipment for pulp and papermaking according to claim 1, characterized in that: The scraper (7) is annular in shape, and there are two scrapers (7) which are parallel to each other.
6. A bleaching and washing equipment for pulp and papermaking according to claim 2, characterized in that: The rack plate (53) is fixedly connected to the other side of the scraper plate (7), and the rack plate (53) is slidably connected to the inner wall of the mounting shell (4).