Water closed cycle waste paper pulping mechanism

Abstract

The invention relates to the technical field of waste paper pulping, and discloses a water closed cycle waste paper pulping mechanism which comprises a support and further comprises an impurity removal box, a spraying box and a treatment box which are sequentially installed on the support from top to bottom. A mixing cylinder used for mixing repulping and a diluting component are installed in the treatment box, a spraying plate is arranged in the spraying box and used for spraying a solution into the treatment box, a conveying pipeline communicated with the treatment box is arranged on the outer side in the impurity removal box, the solution is conveyed into the impurity removal box through a water pump, and an air flotation component is arranged in the impurity removal box. Wastewater is reused, closed circulation of the wastewater is achieved, repulping is limited by the mixing cylinder, the wastewater in the circulation process does not need to be additionally filtered, in the wastewater reuse process, a large amount of repulping is diluted by a small amount of recycled wastewater, and the wastewater is recycled. Meanwhile, the solution can be circulated while being diluted, so that the discharge of wastewater is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of waste paper pulping, in particular to a water closed circulation waste paper pulping mechanism. Background Art

[0002] The waste paper pulping process involves feeding the waste paper into a hydraulic pulper, adding water and possibly a deinking agent, and using a rotating impeller to break it down into a coarse pulp. The pulp is then screened through multiple stages to gradually improve its cleanliness. The crushed pulp is then added to a liquid mixed with a deinking agent to separate the ink from the pulp.

[0003] Patent publication number CN118374993B, titled "A Water-Closed Circulation Waste Paper Pulping System and Process," aims to address the high wastewater treatment costs and poor deinking / bleaching performance issues of existing technologies by achieving water recycling and efficient treatment through structural optimization. The system's main structure consists of a first barrel receiving the mixture from the tank, adding bleaching agent, and supplemented by an annular seat for jet mixing. A second barrel settles the pulp and removes excess water. A third barrel adds a decomposition agent to treat the wastewater, which is then purified and reused in the system, forming a closed water cycle. This achieves wastewater recycling.

[0004] However, when wastewater is reused in the wastewater recycling process to deink the pulp, a large amount of water must be mixed with the pulp, and the pulp must be diluted to 4%-6%. The more diluted the pulp is, the greater the likelihood of full contact with the liquid. Therefore, it is necessary to ensure that the pulp is fully contacted and mixed with the water containing surfactants. The aforementioned patent does not guarantee that the added pulp will be diluted to the corresponding degree when the solution volume remains unchanged when the wastewater is reused. Summary of the Invention

[0005] The object of the present invention is to provide a water-closed circulation waste paper pulping mechanism to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a water closed cycle waste paper pulping mechanism, comprising a bracket, and further comprising a debris removal box, a spray box and a treatment box sequentially installed on the bracket from top to bottom;

[0007] A mixing drum and a dilution component for mixing the shredded pulp are installed inside the processing box. A spray plate is provided in the spray box for spraying the solution into the processing box. The inner and outer sides of the impurity removal box are provided with conveying pipes connected to the processing box, and the solution is conveyed to the impurity removal box by a water pump. The impurity removal box has an air flotation component. A pipe body with a valve is fixed at the lower end of the impurity removal box for transferring the solution to the spray box.

[0008] Furthermore, the spray plate is fixed to the lower end of the interior of the spray box, and a partition plate 1 is also fixed inside the spray box. The upper end of the partition plate 1 is provided with a partition plate 2, and the partition plate 2 is slidably arranged with the spray box. A detachable one-way valve is installed on both the partition plate 1 and the partition plate 2, and the detachable one-way valve can only flow downward;

[0009] A cylinder is fixed on the spray box, and an output end of the cylinder is fixed to the second partition plate for controlling the movement of the second partition plate in the up and down directions.

[0010] Furthermore, the outer peripheries of the partition plate 1 and the partition plate 2 are sealed with the spray box.

[0011] Furthermore, a servo motor for driving the mixing drum to rotate is fixed to the outside of the processing box, and the mixing drum includes a drum plate, a drum ring, a support plate and a rotating shaft;

[0012] The rotating shaft is rotatably mounted on the upper end of the processing box, and one end of the rotating shaft is detachably mounted on the output end of the servo motor. The supporting plate comprises a plurality of pieces, and the plurality of supporting plates are evenly distributed around the circumference and fixed between the cylinder plate and the cylinder ring. The cylinder plate and the rotating shaft are coaxial and fixed to each other.

[0013] The outer sides of the plurality of support plates are provided with a circle of filter screen for trapping the shredded pulp in the mixing cylinder.

[0014] Furthermore, the side surface of the support plate has a cavity layer provided therethrough, and the cavity layer also has a filter screen. When the support plate rotates, the shredded pulp is brought upward and clamped on the filter screen.

[0015] Furthermore, the spray plate is in the shape of an elongated strip and has arranged nozzles thereon, and the arranged nozzles are located directly above the rotating shaft.

[0016] Furthermore, the dilution component includes a dilution rack and a receiver;

[0017] The dilution rack is detachably fixed on the processing box, the receiver is fixed to the dilution rack, the receiver extends laterally to the interior of the mixing barrel, the receiver is located between the spray plate and the rotating shaft, and is in the same plane as the spray plate and the rotating shaft, the receiver is used to receive the solution sprayed downward and the crushed pulp brought up by the support plate.

[0018] Furthermore, the adapter is in the shape of a tube with an open upper end and closed at both ends.

[0019] Furthermore, an inner shaft is rotatably installed in the adapter, a transmission belt is provided between the inner shaft and the rotating shaft, a connecting rod is fixed to the outer wall of the inner shaft, and a scraper is fixed to the outer side of the connecting rod and is in contact with the inner wall of the adapter.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Reuse the wastewater to realize the closed cycle of wastewater, and the pulp is limited by the mixing drum, so that the wastewater in the circulation process does not need additional filtration.

[0022] 2. In the process of wastewater reuse, a large amount of pulp can be diluted with a small amount of recycled wastewater. At the same time, the solution can be circulated while being diluted to reduce the discharge of wastewater.

[0023] 3. The overflow design of the receiver automatically replaces the pulp and solution. Combined with the support plate, the pulp is moved into the receiver, so that different pulps can be diluted in a limited space and solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the position structure of the processing box, impurity removal box and spray box of the present invention;

[0027] Figure 3 This is a schematic diagram of the half-section structure of the spray box of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the second movement direction of the partition in the spray box of the present invention;

[0029] Figure 5 This is a schematic diagram of a partial cross-section of the treatment box and the mixing cylinder of the present invention with the filter screen hidden;

[0030] Figure 6 This is a schematic diagram of the structure of the mixing cylinder of the present invention without the filter screen;

[0031] Figure 7 This invention Figure 6 A schematic diagram of the partially enlarged structure of the middle part;

[0032] Figure 8 It is a structural schematic diagram of the dilution component of the present invention;

[0033] Figure 9 It is a schematic diagram of the corresponding planar structure of the adapter and the upper support plate of the present invention.

[0034] In the figure: 1. bracket; 2. processing box; 3. impurity removal box; 31. conveying pipeline; 32. flotation component; 4. spray box; 41. cylinder; 42. spray plate; 43. partition 1; 44. partition 2; 45. detachable one-way valve; 5. mixing cylinder; 51. servo motor; 52. cylinder plate; 53. cylinder ring; 54. support plate; 541. cavity layer; 55. rotating shaft; 6. dilution component; 61. dilution rack; 62. adapter; 63. inner shaft; 64. connecting rod; 65. scraper; 66. belt. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0036] See also Figures 1-9 , the present invention provides a technical solution: in the waste paper pulping process, high wastewater treatment costs and low deinking efficiency are the pain points of the industry. The traditional method uses a hydraulic pulper to crush waste paper and deink after multi-stage screening, but it is difficult to control the pulp dilution concentration during the wastewater reuse process, resulting in insufficient contact between the deinking agent and the fiber. The existing patent realizes water circulation through a three-stage barrel, but the mixing ratio of the pulp and the solution cannot be dynamically adjusted when the circulating water is reused, which affects the deinking effect. A water closed circulation waste paper pulping mechanism is proposed, such as Figure 1 As shown, it includes a bracket 1, and also includes a cleaning box 3, a spray box 4 and a processing box 2 installed on the bracket 1 in sequence from top to bottom;

[0037] A mixing drum 5 and a dilution component 6 for mixing the slurry are installed inside the processing box 2. A spray plate 42 is provided in the spray box 4 for spraying the solution into the processing box 2. A conveying pipe 31 connected to the processing box 2 is provided inside and outside the impurity removal box 3. The solution is conveyed to the impurity removal box 3 by a water pump. An air flotation component 32 is provided in the impurity removal box 3. A pipe body with a valve is fixed at the lower end of the impurity removal box 3 for conveying the solution to the spray box 4.

[0038] Specifically, the pulp is processed in treatment tank 2 for deinking, after which the wastewater is transferred to impurity removal tank 3 for further treatment. The wastewater in impurity removal tank 3 can be treated at multiple levels, with impurities separated by flotation or flocculation, allowing the wastewater to be recycled. It should be noted that the wastewater treatment process is conventional. The treated solution is then recycled to spray tank 4, where it can be refilled with solution. The primary function of spray tank 4 is to pressurize the solution downward and allow it to enter dilution unit 6, thereby diluting the localized pulp.

[0039] like Figure 3 and Figure 4 As shown, the spray plate 42 is fixed to the lower end of the interior of the spray box 4. A partition 1 43 is also fixed inside the spray box 4. A partition 2 44 is provided on the upper end of the partition 1 43. The partition 2 44 is slidably arranged with the spray box 4. A detachable one-way valve 45 is installed on each of the partitions 1 43 and 44. The detachable one-way valve 45 can only flow downward.

[0040] A cylinder 41 is fixed on the spray box 4 , and an output end of the cylinder 41 is fixed to the second partition 44 for controlling the movement of the second partition 44 in the up and down directions.

[0041] Specifically, the spray plate 42 realizes the downward spraying function through the action of the partition 1 43, the partition 2 44 and the detachable one-way valve 45.

[0042] The outer peripheries of the partition plate 1 43 and the partition plate 2 44 are sealed with the spray box 4 to achieve squeezing of the solution.

[0043] like Figure 5 、 Figure 6 and Figure 7 As shown, Figure 5 、 Figure 6 and Figure 7 In order to see the structure more intuitively, the filter is hidden. A servo motor 51 for driving the mixing drum 5 to rotate is fixed to the outside of the processing box 2. The mixing drum 5 includes a drum plate 52, a drum ring 53, a support plate 54 and a rotating shaft 55.

[0044] The rotating shaft 55 is rotatably mounted on the upper end of the processing box 2. One end of the rotating shaft 55 is detachably mounted on the output end of the servo motor 51. The supporting plate 54 comprises a plurality of plates, which are evenly distributed around the circumference and fixed between the cylinder plate 52 and the cylinder ring 53. The cylinder plate 52 and the rotating shaft 55 are coaxial and fixed to each other.

[0045] A circle of filter screen is provided on the outside of the plurality of support plates 54 for trapping the pulp in the mixing drum 5 .

[0046] Specifically, a filter screen is provided on the outside of the mixing cylinder 5 , which can confine the slurry inside the mixing cylinder 5 , making it easy to recover the solution inside the treatment box 2 and also to take out the slurry.

[0047] The side of the support plate 54 has a cavity layer 541 that penetrates through it. The cavity layer 541 also has a filter screen. When the support plate 54 rotates, it is used to bring the shredded pulp upward and clamp it on the filter screen.

[0048] Specifically, the rotating support plate 54 can clamp the slurry on the filter screen, and after the support plate 54 moves to the liquid surface, the filter screen can filter the solution in the slurry, so that only the slurry exists as much as possible. Due to the action of the filter screen, the slurry adheres to the filter screen. Only when the support plate 54 rotates to the uppermost end and contacts the sprayed solution can the slurry be flushed downward into the dilution component 6.

[0049] The spray plate 42 is in the shape of an elongated strip and has arranged nozzles thereon. The arranged nozzles are located directly above the rotating shaft 55 , so that the sprayed solution moves into the dilution component 6 and flushes the slurry on the uppermost support plate 54 downward into the dilution component 6 .

[0050] like Figure 8 and Figure 9 As shown, the dilution component 6 includes a dilution rack 61 and a receiver 62;

[0051] The dilution rack 61 is detachably fixed on the processing box 2, and the receiver 62 is fixed to the dilution rack 61. The receiver 62 extends laterally to the interior of the mixing barrel 5. The receiver 62 is located between the spray plate 42 and the rotating shaft 55, and is in the same plane as the spray plate 42 and the rotating shaft 55. The receiver 62 is used to receive the solution sprayed downward and the crushed pulp brought up by the support plate 54.

[0052] Specifically, the receiver 62 continuously collects the pulp and is continuously impacted by the solution, the pulp is diluted, and the pulp in the mixing drum 5 is repeatedly replaced, so that the pulp in the mixing drum 5 is completely diluted and only a small amount of solution is required.

[0053] The receiver 62 is a cylindrical arrangement with an open upper end and closed at both ends, so that when the receiver 62 is full, it will automatically overflow outwards, causing the solution and pulp to move outwards.

[0054] An inner shaft 63 is rotatably installed in the adapter 62, and a transmission belt 66 is provided between the inner shaft 63 and the rotating shaft 55. A connecting rod 64 is fixed to the outer wall of the inner shaft 63, and a scraper 65 is fixed to the outer side of the connecting rod 64 to fit the inner wall of the adapter 62.

[0055] Specifically, the scraper 65 stirs the interior of the receiver 62 to further mix and dilute the pulp, and also prevents the pulp from adhering to the inner wall of the receiver 62 .

[0056] The working principle of the present invention is as follows: during operation, the pulp is first poured into the interior of the mixing drum 5. During the rotation of the mixing drum 5, the internal pulp is driven to move and mix with the solution inside the treatment box 2. Then, the solution in the treatment box 2 is driven to move by the pump body inside the impurity removal box 3, and moves from the conveying pipe 31 to the interior of the impurity removal box 3. After that, the impurities are separated by the flotation component 32 in the impurity removal box 3. The separated solution moves downward to the spray box 4, and the solution is re-added to the treatment box 2 through the spray plate 42 to realize the circulation of the solution.

[0057] It should be noted that the air flotation component 32 is an existing technology and will not be elaborated in the application. Secondly, the solution can be added from the outside to the inside of the spray box 4 to ensure that the solution is maintained at a certain amount. Solvent can also be added to maintain the concentration of the solution for easy adjustment.

[0058] The support plate 54 that constitutes the mixing drum 5 rotates with the mixing drum 5. Since its cavity layer 541 has a filter screen, one rotation can lift the pulp in the solution and drive a certain amount of drained solution to the top. Under the action of the downward spraying of the spray plate 42, the pulp on the filter screen is sprayed downward and the pulp moves to the receiver 62. A small amount of pulp is located in the receiver 62, so that the pulp and solution are fully mixed to achieve the effect of deinking. It should be noted that the pulp can continuously move into the receiver 62 along with the support plate 54, and the spray plate 42 also realizes the effect of continuous downward spraying to maintain a certain degree of dilution. It should also be noted that when the receiver 62 is full, it automatically overflows outward to maintain a certain dilution state, where the dilution state mainly depends on the speed at which the pulp and the sprayed solution move into the receiver 62.

[0059] In addition, the rotation of the rotating shaft 55 drives the inner shaft 63 to rotate, so that the scraper 65 further mixes the sprayed solution with the pulp, and prevents the pulp from adhering to the inner wall of the receiver 62;

[0060] The solution sprayed downward by the spray plate 42 has an impact effect based on the speed of the spray solution, further impacting the shredded pulp in the receiver 62 and further dispersing the shredded pulp. It should be noted that the solution sprayed downward by the spray plate 42 is treated and always in a fresh state, mixing with the shredded pulp to ensure deinking.

[0061] In the spray box 4, the cylinder 41 drives the partition 2 44 to move up and down. Since the partition 1 43 and the partition 2 44 are both provided with a detachable one-way valve 45, when the partition 2 44 moves upward, liquid flows into the space between the partition 1 43 and the partition 2 44. When the partition 2 44 is pressed downward, the solution between the partition 1 43 and the partition 2 44 moves downward, realizing the downward spraying effect of the spray plate 42. Figure 4It should be noted that when the solvent is added to the spray box 4 and the solution is passed through, mixing is automatically carried out under the action of the movement of the partition 2 44 and the spraying. It should also be noted that the solvent and the solution are surfactants that saponify the ink and separate it from the fiber.

[0062] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0063] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A water-closed cycle waste paper pulping mechanism, comprising a support (1), characterized in that: It also includes a cleaning box (3), a spray box (4) and a processing box (2) which are sequentially installed on the bracket (1) from top to bottom; The processing box (2) is internally provided with a mixing drum (5) and a dilution component (6) for mixing the pulp. The spray box (4) is internally provided with a spray plate (42) for spraying the solution into the processing box (2). The inside and outside of the impurity removal box (3) are provided with a delivery pipe (31) connected to the processing box (2). The solution is delivered to the impurity removal box (3) by a water pump. The impurity removal box (3) is internally provided with an air flotation component (32). A pipe body with a valve is fixed at the lower end of the impurity removal box (3) for delivering the solution to the spray box (4).

2. The water-closed cycle waste paper pulping mechanism according to claim 1, characterized in that: The spray plate (42) is fixed to the lower end of the interior of the spray box (4), and a partition plate (43) is also fixed inside the spray box (4). The upper end of the partition plate (43) is provided with a partition plate (44). The partition plate (44) and the spray box (4) are slidably arranged. A detachable one-way valve (45) is installed on each of the partition plates (43) and the partition plate (44). The detachable one-way valve (45) can only flow downward. A cylinder (41) is fixed on the spray box (4), and an output end of the cylinder (41) is fixed to the second partition (44) for controlling the movement of the second partition (44) in the up and down directions.

3. The water-closed cycle waste paper pulping mechanism according to claim 2, characterized in that: The outer peripheries of the partition plate 1 (43) and the partition plate 2 (44) are sealed with the spray box (4).

4. The water-closed cycle waste paper pulping mechanism according to claim 1, characterized in that: A servo motor (51) for driving a mixing drum (5) to rotate is fixed on the outside of the processing box (2). The mixing drum (5) includes a drum plate (52), a drum ring (53), a support plate (54) and a rotating shaft (55); The rotating shaft (55) is rotatably mounted on the upper end of the processing box (2), and one end of the rotating shaft (55) is detachably mounted on the output end of the servo motor (51). The supporting plate (54) comprises a plurality of plates, which are evenly distributed on the circumference and fixed between the cylinder plate (52) and the cylinder ring (53). The cylinder plate (52) and the rotating shaft (55) are coaxial and fixed to each other. The outer sides of the plurality of support plates (54) are provided with a circle of filter screens for trapping the shredded pulp in the mixing drum (5).

5. The water-closed cycle waste paper pulping mechanism according to claim 4, characterized in that: The side of the support plate (54) has a cavity layer (541) provided therethrough, and the cavity layer (541) also has a filter screen. When the support plate (54) rotates, it is used to lift the pulp upwards and clamp it on the filter screen.

6. The water-closed cycle waste paper pulping mechanism according to claim 5, characterized in that: The spray plate (42) is in the shape of an elongated strip and has arranged nozzles on the spray plate (42). The arranged nozzles are located directly above the rotating shaft (55).

7. The water-closed cycle waste paper pulping mechanism according to claim 4, characterized in that: The dilution component (6) includes a dilution rack (61) and a receiver (62); The dilution rack (61) is detachably fixed to the processing box (2), and the receiver (62) is fixed to the dilution rack (61). The receiver (62) extends transversely to the interior of the mixing barrel (5). The receiver (62) is located between the spray plate (42) and the rotating shaft (55), and is in the same plane as the spray plate (42) and the rotating shaft (55). The receiver (62) is used to receive the solution sprayed downward and the pulp brought up by the support plate (54).

8. The water-closed cycle waste paper pulping mechanism according to claim 7, characterized in that: The adapter (62) is in the shape of a tube with an open upper end and closed at both ends.

9. The water-closed cycle waste paper pulping mechanism according to claim 7, characterized in that: An inner shaft (63) is rotatably mounted in the adapter (62), a transmission belt (66) is provided between the inner shaft (63) and the rotating shaft (55), a connecting rod (64) is fixed to the outer wall of the inner shaft (63), and a scraper (65) is fixed to the outer side of the connecting rod (64) and is in contact with the inner wall of the adapter (62).

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