An integrated device for pretreatment and pulp preparation of recycled pulp fibers

Abstract

This invention provides an integrated pretreatment and pulping device for recycled paper fibers, relating to the field of waste paper recycled fiber processing. The device includes: a frame, a pretreatment pulping tank, a pulping tank, a rotating shaft, a geared motor, a first electric gate valve, a second electric gate valve, a drain housing, and a control box. The pretreatment pulping tank is installed on the upper inner side of the frame, and the pulping tank is installed on the lower inner side of the frame. A rotating shaft rotatably connects the pretreatment pulping tank and the pulping tank. By integrating the pretreatment pulping tank and the pulping tank onto the frame, this invention significantly shortens the conveying distance of the pulp after pretreatment, avoiding adverse effects on the strength and other properties of the finished paper caused by long-distance fiber settling. Simultaneously, the integrated arrangement of the pretreatment pulping tank and the pulping tank significantly reduces the overall footprint of the equipment, lowers site layout costs, and is more suitable for compact production line layouts.

Description

Technical Field

[0001] This invention relates to the field of waste paper recycled fiber treatment technology, and in particular to an integrated device for pretreatment and pulp preparation of recycled pulp fibers. Background Technology

[0002] With the deepening of the circular economy concept and increasingly stringent environmental regulations, recycled paper production has become an important development direction for the paper industry. It can alleviate the industry's predicament of supply shortages of high-quality fiber raw materials and reliance on imports, while also realizing the resource utilization of waste, aligning with the "dual-carbon" strategy and green manufacturing requirements. The core processes of recycled paper production include recycled fiber pretreatment and pulping. Pretreatment involves processes such as pulping, deinking, bleaching, and washing of waste paper; pulping involves mixing the pretreated recycled fiber pulp with virgin pulp and fillers in specific proportions according to the quality requirements of the finished paper.

[0003] Currently, existing technologies for pretreatment and pulping of recycled fibers mostly employ separate equipment, with pulping and pretreatment equipment operating independently. This necessitates the transport of pretreated pulp to the pulping equipment via long-distance pipelines, during which fiber sedimentation is prone to occur, affecting key properties such as the strength of the finished paper. Furthermore, separate equipment occupies a large area, and the pulping and pretreatment structure cannot be linked with the pulping and mixing structure, requiring separate motor drives, increasing equipment costs and energy consumption. In addition, during pulp pretreatment, filters are typically used to separate pulp fibers from wastewater, such as deinking wastewater. However, these filters are easily clogged by fibers when intercepting them, affecting wastewater discharge efficiency. Unclogging requires manual operation with tools after machine shutdown, which is detrimental to the efficient production of recycled fibers. Summary of the Invention

[0004] This invention relates to an integrated device for pretreatment and pulping of recycled pulp fibers. It solves the problems of existing technologies that use separate equipment for pretreatment and pulping of recycled fibers, which require long-distance transport of pulp and are prone to fiber sedimentation. In addition, the separate equipment has a large footprint, and the pulping and pretreatment structure and the pulping and mixing structure cannot be linked, resulting in high cost and energy consumption. Furthermore, the filter screen that intercepts pulp fibers is prone to clogging and requires manual cleaning after machine shutdown, which affects production efficiency.

[0005] In a first aspect, this invention provides an integrated pretreatment and mixing device for recycled pulp fibers, specifically comprising: a frame, a pretreatment pulping tank, a mixing tank, a rotating shaft, a geared motor, a first electric gate valve, a second electric gate valve, a drain housing, and a control box. The pretreatment pulping tank is installed on the upper inner side of the frame, and the mixing tank is installed on the lower inner side of the frame. A rotating shaft is rotatably connected between the pretreatment pulping tank and the mixing tank, and the rotating shaft passes through the bottom of the pretreatment pulping tank and the upper and lower end faces of the mixing tank. A geared motor is installed on the top of the mixing tank. The bottom of the pulping tank is equipped with a discharge port communicating with its interior, and the top of the mixing tank is equipped with a feed pipe communicating with its interior. A first electric gate valve is installed between the discharge port and the feed pipe. The bottom of the mixing tank is equipped with a pulp outlet communicating with its interior, and a second electric gate valve is installed at the bottom of the pulp outlet. A sludge discharge port is opened on the right side of the bottom end face of the mixing tank, and a filter screen is installed inside the sludge discharge port. The upper surface of the filter screen is at the same level as the bottom end face of the mixing tank. A linkage unblocking mechanism is installed at the bottom of the mixing tank below the filter screen. A control box is installed on the frame.

[0006] Furthermore, a support frame is installed on the top of the pretreatment pulping tank, and a bearing seat is installed on the top of the support frame. The bearing seat is rotatably connected to the upper end of the rotating shaft.

[0007] Furthermore, a slurry mixing port is provided on the front side of the top of the slurry mixing tank, and a water inlet is provided on the top of the slurry mixing tank. Both the slurry mixing port and the water inlet are connected to the interior of the slurry mixing tank.

[0008] Furthermore, a spiral pulverizing blade is fixedly connected to the upper outer side of the rotating shaft, and an agitator blade is fixedly connected to the lower outer side of the rotating shaft.

[0009] Furthermore, a cleaning brush is installed at the bottom of the stirring blade, and the bristles of the cleaning brush can contact the surface of the filter screen.

[0010] Furthermore, a driven pulley is fixedly mounted on the outside of the rotating shaft, and a first bevel gear is mounted on the lower end of the rotating shaft; a drive pulley is fixedly mounted on the output shaft of the geared motor, and the drive pulley is connected to the driven pulley via a belt.

[0011] Furthermore, a base plate is bolted to the bottom of the sewage discharge housing, and a sealing gasket is installed between the base plate and the sewage discharge housing; a sewage discharge pipe is installed in the middle of the bottom end face of the base plate, and a solenoid valve is installed on the sewage discharge pipe.

[0012] Furthermore, the linkage unblocking mechanism includes a crankshaft, which is rotatably connected inside the sewage discharge housing. The crankshaft passes through the left and right side walls of the sewage discharge housing. Two cranks are installed on the crankshaft, and a journal is fixedly connected to the inner side of each crank. A connecting rod is rotatably connected to the outer side of each journal. A lifting plate is rotatably connected to the upper end of each connecting rod through a rotating shaft. Unblocking rods are evenly arranged on the upper surface of each lifting plate. A guide cylinder is fixedly connected to the bottom end of the lifting plate, and a guide rod is slidably connected inside the guide cylinder. The guide rod is fixedly connected to the upper surface of the bottom plate. A second bevel gear is installed at the left end of the crankshaft, and the second bevel gear meshes with the first bevel gear.

[0013] Furthermore, the diameter of the cleaning rod is smaller than the mesh diameter of the filter screen.

[0014] Furthermore, when the crankshaft is rotating, the upper ends of the unclogging rods on the two lifting plates are alternately inserted into the corresponding mesh holes on the filter screen.

[0015] This invention provides an integrated device for pretreatment and pulp preparation of recycled pulp fibers, which has the following beneficial effects: This invention significantly shortens the conveying distance of the pulp after pretreatment by integrating the pretreatment pulping tank and the mixing tank on the frame, thus avoiding adverse effects on the strength and other properties of the finished paper caused by long-distance fiber settling. At the same time, the integrated arrangement of the pretreatment pulping tank and the mixing tank can significantly reduce the overall footprint of the equipment, reduce site layout costs, and is more suitable for compact production line layouts.

[0016] Furthermore, this invention utilizes a coordinated design of rotating shafts, spiral pulping blades, and agitator blades. During pulp preparation, the agitator blades are synchronously driven to rotate continuously by the same rotating shaft, thoroughly mixing the pulp inside the preparation tank. This effectively improves the uniformity of pulp mixing and ensures stable pulp quality. Simultaneously, the agitator blades used for pulp preparation can be coaxially linked with the spiral pulping blades via the rotating shaft, allowing the pulping and mixing processes to share the same drive power source. This eliminates the need for separate drive motors, effectively simplifying the equipment drive structure, significantly reducing manufacturing costs and operating energy consumption, and improving the overall economic efficiency of the equipment.

[0017] Furthermore, this invention, by setting up a linkage-type unblocking mechanism in coordination with the cleaning brush, enables the rotating shaft to synchronously drive the stirring blades and the cleaning brush to rotate during wastewater discharge operations. The rotating cleaning brush continuously cleans and peels off the pulp fibers adhering to the filter screen surface. Simultaneously, the rotating shaft drives the first bevel gear, the second bevel gear, and the crankshaft to rotate. The crankshaft further drives the crank, journal, and lower end of the connecting rod to rotate. Under the combined action of the crank, journal, and connecting rod, the lifting plate and the unblocking rod perform periodic reciprocating lifting and lowering movements. During this process, the upper ends of the unblocking rods on the two lifting plates can alternately insert into the corresponding mesh holes on the filter screen, pushing out the fibers blocked in the mesh holes. This effectively avoids the phenomenon of reduced wastewater discharge efficiency caused by filter screen blockage. The entire unblocking action is automatically completed during equipment operation without the need for manual disassembly and cleaning, greatly improving the continuity of pulp pretreatment and ensuring the efficient and stable operation of the recycled fiber production line.

[0018] Furthermore, the present invention, through the cooperative design of the first bevel gear and the second bevel gear, enables the rotating shaft to rotate simultaneously, thereby driving the first bevel gear, the second bevel gear and the crankshaft to rotate together. In this way, the linkage unblocking mechanism does not require an additional motor during operation, further reducing costs and energy consumption. Attached Figure Description

[0019] To more clearly illustrate the technical solution of the present invention, the accompanying drawings of the present invention will be briefly described below.

[0020] In the attached diagram: Figure 1 A three-dimensional structural schematic diagram of this application is shown; Figure 2 A structural schematic diagram of this application from a rear view is shown; Figure 3 This diagram illustrates the structure of this application in its disassembled state. Figure 4 This diagram shows a partial cross-sectional view of the pretreatment pulping tank, discharge port, pulp mixing tank, feed pipe, pulp outlet and sludge discharge shell of this application. Figure 5 A schematic diagram of the structure of this application after the sewage outlet and filter screen are separated is shown; Figure 6 A partially cross-sectional structural schematic diagram of the filter screen, drain housing, base plate, and sealing gasket of this application is shown; Figure 7 This application shows Figure 4 A magnified structural diagram of part A in the middle; Figure 8 This paper shows a schematic diagram of the disassembled state of the linkage unblocking mechanism of this application; Figure 9 A schematic diagram of the disassembled sewage casing and base plate of this application is shown.

[0021] List of reference numerals 1. Rack; 2. Pretreatment pulping tank; 201. Support frame; 202. Bearing housing; 203. Discharge port; 3. Mixing tank body; 301. Feed pipe; 302. Mixing port; 303. Water inlet; 304. Slurry outlet; 305. Drain outlet; 306. Filter screen; 4. Rotating shaft; 401. Spiral pulverizer blades; 402. Agitator blades; 403. Cleaning brush; 404. Driven pulley; 405. First bevel gear; 5. Gear motor; 501. Drive pulley; 6. First electric gate valve; 7. Second electric gate valve; 8. Drain housing; 801. Base plate; 802. Drain pipe; 803. Solenoid valve; 804. Sealing gasket; 9. Control box; 10. Linkage-type unblocking mechanism; 1001. Crankshaft; 1002. Crank; 1003. Connecting rod; 1004. Lifting plate; 1005. Unblocking rod; 1006. Guide slide; 1007. Guide slide rod; 1008. Second bevel gear; 1009. Journal. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1: Please refer to Figures 1 to 9 : This invention proposes an integrated pretreatment and pulping device for recycled pulp fibers, comprising: a frame 1, a pretreatment pulping tank 2, a pulping tank 3, a rotating shaft 4, a geared motor 5, a first electric gate valve 6, a second electric gate valve 7, a drain housing 8, and a control box 9. The pretreatment pulping tank 2 is installed on the upper inner side of the frame 1, and the pulping tank 3 is installed on the lower inner side of the frame 1. The rotating shaft 4 is rotatably connected to the pretreatment pulping tank 2 and the pulping tank 3, penetrating the bottom of the pretreatment pulping tank 2 and the upper and lower end faces of the pulping tank 3. The geared motor 5 is installed on the top of the pulping tank 3. The geared motor 5 integrates the motor and the reduction mechanism into a single transmission device. Its core advantage lies in reducing the rotational speed and increasing the output torque, thereby improving… The machine is adaptable to various load requirements; the bottom of the pretreatment pulping tank 2 is provided with a discharge port 203 communicating with its interior, the top of the pulp mixing tank 3 is provided with a feed pipe 301 communicating with its interior, and a first electric gate valve 6 is installed between the discharge port 203 and the feed pipe 301; the bottom of the pulp mixing tank 3 is provided with a pulp outlet 304 communicating with its interior, and a second electric gate valve 7 is installed at the bottom of the pulp outlet 304; a sewage outlet 305 is opened on the right side of the bottom end face of the pulp mixing tank 3, and a filter screen 306 is installed inside the sewage outlet 305. The upper end face of the filter screen 306 is at the same level as the bottom end face of the interior of the pulp mixing tank 3. A linkage unblocking mechanism 10 is set at the bottom of the pulp mixing tank 3 below the filter screen 306; a control box 9 is installed on the frame 1, and a controller is installed inside the control box 9; By integrating the pre-treatment pulping tank 2 and the pulp mixing tank 3 onto the frame 1, the conveying distance of the pulp after pre-treatment is significantly shortened, avoiding adverse effects on the strength and other properties of the finished paper caused by long-distance fiber settling. At the same time, the integrated arrangement of the pre-treatment pulping tank 2 and the pulp mixing tank 3 can effectively reduce the overall footprint of the equipment, reduce site layout costs, and better adapt to compact production line layouts.

[0024] A support frame 201 is installed on the top of the pretreatment pulping tank 2, and a bearing seat 202 is installed on the top of the support frame 201. The bearing seat 202 is rotatably connected to the upper end of the rotating shaft 4. Through the setting of the support frame 201 and the bearing seat 202, effective support can be provided for the upper end of the rotating shaft 4, thereby improving the stability of the rotating shaft 4 when it rotates.

[0025] A pulp mixing port 302 is provided on the front side of the top of the pulp mixing tank 3, and a water inlet 303 is provided on the top of the pulp mixing tank 3. Both the pulp mixing port 302 and the water inlet 303 are connected to the inside of the pulp mixing tank 3. Through the water inlet 303, clean water can be added into the pulp mixing tank 3 to wash the pulp inside the pulp mixing tank 3. During this process, the rotating shaft 4 can drive the stirring blade 402 to rotate, thereby stirring the washed pulp and improving the washing effect. After the pulp is washed, the wastewater is discharged through the drain port 305 and the drain pipe 802. The pulp mixing port 302 facilitates the addition of blending pulp into the pulp mixing tank 3.

[0026] A spiral pulping blade 401 is fixedly connected to the upper outer side of the rotating shaft 4. The lower part of the spiral pulping blade 401 is also provided with pulping serrations to improve the pulping effect on waste paper. An agitator blade 402 is fixedly connected to the lower outer side of the rotating shaft 4. The agitator blade 402 can achieve two functions: one is to drive the agitator blade 402 to rotate during pulp washing to agitate the washed pulp and improve the washing effect; the other is to drive the agitator blade 402 to rotate during pulp mixing to agitate the mixed pulp and paper pulp and improve the mixing effect of the pulp and paper pulp. By adopting the above technical solution, during the pulp preparation process, the stirring blade 402 is synchronously driven by the same rotating shaft 4 to rotate continuously, which fully stirs and mixes the pulp inside the preparation tank 3, effectively improving the uniformity of pulp mixing and ensuring stable pulp quality. At the same time, the stirring blade 402 used for pulp preparation can be coaxially linked with the spiral pulping blade 401 through the rotating shaft 4, so that the pulping process and the pulp preparation and stirring process share the same driving power source, thus eliminating the need to configure separate drive motors, thereby effectively simplifying the equipment drive structure, greatly reducing equipment manufacturing costs and operating power consumption, and improving the overall operating economy of the equipment.

[0027] A cleaning brush 403 is installed at the bottom of the stirring blade 402. The bristles of the cleaning brush 403 can contact the upper surface of the filter screen 306. By installing the cleaning brush 403 at the bottom of the stirring blade 402, the pulp fibers attached to the surface of the filter screen 306 can be continuously cleaned and peeled off by rotating the cleaning brush 403.

[0028] A driven pulley 404 is fixedly mounted on the outside of the rotating shaft 4, and a first bevel gear 405 is mounted on the lower end of the rotating shaft 4; a drive pulley 501 is fixedly mounted on the output shaft of the geared motor 5, and the drive pulley 501 is connected to the driven pulley 404 through a belt; the diameter of the drive pulley 501 is one-third of the diameter of the driven pulley 404, so that there is a certain transmission ratio between the drive pulley 501 and the driven pulley 404, making it easier for the drive pulley 501 to drive the driven pulley 404 to rotate.

[0029] The bottom of the sewage discharge housing 8 is connected to a base plate 801 by bolts, and a sealing gasket 804 is provided between the base plate 801 and the sewage discharge housing 8; a sewage discharge pipe 802 is provided in the middle of the bottom end face of the base plate 801, and a solenoid valve 803 is installed on the sewage discharge pipe 802; the solenoid valve 803, the second electric gate valve 7, the first electric gate valve 6, and the geared motor 5 are all electrically connected to the controller inside the control box 9.

[0030] Example 2, based on Example 1, such as Figure 4 , Figure 6 , Figure 7 and Figure 8 As shown, the linkage unblocking mechanism 10 includes a crankshaft 1001, which is rotatably connected inside the sewage discharge housing 8. The crankshaft 1001 passes through the left and right side walls of the sewage discharge housing 8. Two cranks 1002 are mounted on the crankshaft 1001. A journal 1009 is fixedly connected to the inner side of each crank 1002. A connecting rod 1003 is rotatably connected to the outer side of each journal 1009. A lifting plate 1004 is rotatably connected to the upper end of each connecting rod 1003 via a rotating shaft. Unblocking rods 1005 are evenly arranged on the upper surface of each lifting plate 1004. The number of unblocking rods 1005 on the two lifting plates 1004 is equal to the number of mesh holes on the filter screen 306. A guide slide cylinder 1006 is fixedly connected to the bottom surface of the lifting plate 1004. A guide slide rod is slidably connected inside the guide slide cylinder 1006. 1007, the guide slide rod 1007 is fixedly connected to the upper end face of the base plate 801. Through the cooperative design of the guide slide cylinder 1006 and the guide slide rod 1007, the lifting plate 1004 can be effectively guided when moving up and down, thereby improving the stability of the lifting plate 1004 and the unblocking rod 1005 when moving up and down. A second bevel gear 1008 is installed on the left end of the crankshaft 1001. The second bevel gear 1008 meshes with the first bevel gear 405. Through the cooperative design of the first bevel gear 405 and the second bevel gear 1008, when the rotating shaft 4 rotates, it can simultaneously drive the first bevel gear 405, the second bevel gear 1008 and the crankshaft 1001 to rotate together. In this way, the linkage unblocking mechanism 10 does not need to be equipped with an additional motor when operating, further reducing costs and power consumption. By adopting the above technical solution, during wastewater discharge operations, the rotating shaft 4 synchronously drives the stirring blades 402 and the cleaning brush 403 to rotate, and the rotating cleaning brush 403 continuously cleans and peels off the pulp fibers attached to the surface of the filter screen 306. At the same time, the rotating shaft 4 drives the first bevel gear 405, the second bevel gear 1008, and the crankshaft 1001 to rotate, and the crankshaft 1001 further drives the crank 1002, the journal 1009, and the lower end of the connecting rod 1003 to rotate. Under the combined action of the crank 1002, the journal 1009, and the connecting rod 1003, The lifting plate 1004 and the unblocking rod 1005 are driven to perform periodic reciprocating lifting and lowering movements. During this process, the upper ends of the unblocking rods 1005 on the two lifting plates 1004 can be alternately inserted into the corresponding mesh holes on the filter screen 306 to push out the fibers blocked in the mesh holes of the filter screen 306. This effectively avoids the phenomenon of reduced wastewater discharge efficiency caused by the clogging of the filter screen 306. The entire unblocking action is automatically completed during the operation of the equipment, and there is no need to stop the machine for manual disassembly and cleaning. Therefore, the continuity of pulp pretreatment is greatly improved, and the efficient and stable operation of the recycled fiber production line is guaranteed. The diameter of the unclogging rod 1005 is smaller than the diameter of the mesh on the filter screen 306, making it easier for the upper end of the unclogging rod 1005 to be inserted into the mesh on the filter screen 306. When the crankshaft 1001 is rotating, the upper ends of the unblocking rods 1005 on the two lifting plates 1004 are alternately inserted into the corresponding mesh holes on the filter screen 306. By allowing the upper ends of the unblocking rods 1005 on the two lifting plates 1004 to be alternately inserted into the corresponding mesh holes on the filter screen 306, all the mesh holes on the filter screen 306 are prevented from being blocked by the unblocking rods 1005, thus ensuring the water leakage efficiency of the filter screen 306.

[0031] The working principle of this invention is as follows: First, add an appropriate amount of clean water to the pretreatment pulping tank 2, start the reduction motor 5, and drive the drive pulley 501, driven pulley 404, and rotating shaft 4 to rotate. The rotating shaft 4 drives the spiral pulping blades 401 and the stirring blades 402 to rotate. The spiral pulping blades 401 agitate the clean water in the pretreatment pulping tank 2. Next, add waste paper to the pretreatment pulping tank 2. Under the action of the rotating spiral pulping blades 401 and water, the waste paper is shredded into pulp. The pulp is then sucked in along the center of the internal axis of the pretreatment pulping tank 2 and subsequently ejected at high speed from the circumference of the tank, forming a violent turbulent circulation. During this process, the pulp, under the tearing action of the spiral pulping blades 401 and the mutual movement of pulp layers at different speeds, generates tremendous friction, causing the pulp to strongly disintegrate and separate fibers in a wet state. Then, add deinking agents, bleaching agents, etc., to the pretreatment pulping tank 2 to further improve the whiteness, brightness, and other properties of the pulp. Next, the first electric gate valve 6 is opened, allowing the deinked and bleached pulp to enter the pulp mixing tank 3 through the discharge port 203 and the feed pipe 301. Then, the solenoid valve 803 is opened, allowing the ink and other wastewater inside the pulp mixing tank 3 to be discharged through the drain port 305 and the drain pipe 802, while the recycled pulp fibers are intercepted by the filter screen 306. Then, clean water is added into the pulp mixing tank 3 through the inlet 303 to wash the pulp inside the pulp mixing tank 3. During this process, the rotating shaft 4 drives the stirring blade 402 to rotate, thereby stirring the washed pulp and improving the washing effect. After the pulp is washed, the wastewater is discharged through the drain outlet 305 and the drain pipe 802.

[0032] During wastewater discharge, the rotating shaft 4 drives the stirring blades 402 and the cleaning brush 403 to rotate. The rotating cleaning brush 403 removes the pulp fibers adhering to the upper surface of the filter screen 306. Simultaneously, the rotating shaft 4 drives the first bevel gear 405, the second bevel gear 1008, and the crankshaft 1001 to rotate. Then, the crankshaft 1001 drives the crank 1002, the journal 1009, and the lower end of the connecting rod 1003 to rotate. The journal 1009 and the connecting rod 1003 work together to drive the lifting plate 1004 and the unblocking rod 1005 to move up and down repeatedly. During this process, the upper ends of the unblocking rods 1005 on the two lifting plates 1004 can be alternately inserted into the corresponding mesh holes on the filter screen 306 to push out the fibers blocked in the mesh holes of the filter screen 306, thus avoiding affecting the wastewater discharge efficiency. Moreover, the entire unblocking process can be completed manually with the help of tools without stopping the machine, thereby ensuring the efficient production of recycled fibers.

[0033] Subsequently, the prepared pulp is added to the pulp mixing tank 3 in proportion through the pulp mixing port 302. After addition, the rotating shaft 4 drives the stirring blade 402 to rotate, thereby stirring the prepared pulp and paper pulp and improving the mixing effect. Moreover, during the mixing process, since the stirring blade 402 used for pulp mixing can be linked with the spiral pulping blade 401 through the rotating shaft 4, there is no need to configure separate independent motors for driving, thus reducing equipment costs and power consumption. After the pulp is prepared, the pulp inside the pulp mixing tank 3 is discharged through the pulp outlet 304 by opening the second electric gate valve 7, and then processed by subsequent processing equipment.

[0034] All the above components are installed, connected, or set up using common mechanical methods, such as welding, threaded connections, and screw connections. Furthermore, the specific structure, model, and coefficient indicators of all components are based on their own technologies, and any method that achieves the desired beneficial effect can be implemented. The aforementioned geared motor 5, first electric gate valve 6, second electric gate valve 7, solenoid valve 803, and controller are all common commercially available devices, and their working principles are based on existing mature technologies; therefore, they will not be elaborated upon here.

[0035] The following points should be noted in this article: 1. The accompanying drawings of the embodiments of the present invention only involve the structures involved in the embodiments of the present invention; other structures can refer to general designs.

[0036] 2. Where there is no conflict, the embodiments of the present invention and the features thereof can be combined with each other to obtain new embodiments.

[0037] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An integrated device for pretreatment and pulp preparation of recycled pulp fibers, comprising: The machine comprises a frame (1), a pretreatment pulping tank (2), a mixing tank (3), a rotating shaft (4), a geared motor (5), a first electric gate valve (6), a second electric gate valve (7), a drain housing (8), and a control box (9). The machine is characterized in that a pretreatment pulping tank (2) is installed on the upper inner side of the frame (1), and a mixing tank (3) is installed on the lower inner side of the frame (1). A rotating shaft (4) is rotatably connected between the pretreatment pulping tank (2) and the mixing tank (3), and the rotating shaft (4) penetrates the bottom of the pretreatment pulping tank (2) and the upper and lower end faces of the mixing tank (3). A geared motor (5) is installed on the top of the mixing tank (3). A discharge port (203) communicating with the interior of the pretreatment pulping tank (2) is provided at the bottom for mixing. The tank body (3) is provided with a feed pipe (301) communicating with its interior at the top, and a first electric gate valve (6) is installed between the discharge port (203) and the feed pipe (301); the slurry mixing tank body (3) is provided with a slurry outlet (304) communicating with its interior at the bottom, and a second electric gate valve (7) is installed at the bottom of the slurry outlet (304); a sewage outlet (305) is provided on the right side of the bottom end face of the slurry mixing tank body (3), and a filter screen (306) is installed inside the sewage outlet (305). The upper end face of the filter screen (306) is at the same level as the bottom end face of the slurry mixing tank body (3), and a linkage unblocking mechanism (10) is provided at the bottom of the slurry mixing tank body (3) below the filter screen (306); a control box (9) is installed on the frame (1).

2. The integrated pretreatment and pulp mixing device for recycled pulp fibers according to claim 1, characterized in that: The pretreatment pulping tank (2) is equipped with a support frame (201) on top, and a bearing seat (202) is installed on top of the support frame (201). The bearing seat (202) is rotatably connected to the upper end of the rotating shaft (4).

3. The integrated pretreatment and pulp mixing device for recycled pulp fibers according to claim 1, characterized in that: The mixing tank (3) has a mixing port (302) on the front side of the top and a water inlet (303) on the top. The mixing port (302) and the water inlet (303) are both connected to the inside of the mixing tank (3).

4. The integrated pretreatment and pulp mixing device for recycled pulp fibers according to claim 1, characterized in that: The rotating shaft (4) is fixedly connected to the upper side of the outside with a spiral pulverizing blade (401), and the rotating shaft (4) is fixedly connected to the lower side of the outside with a stirring blade (402).

5. The integrated pretreatment and pulp mixing device for recycled pulp fibers according to claim 4, characterized in that: A cleaning brush (403) is installed at the bottom of the stirring blade (402), and the bristles of the cleaning brush (403) can contact the upper surface of the filter screen (306).

6. The integrated pretreatment and pulp mixing device for recycled pulp fibers according to claim 1, characterized in that: A passive pulley (404) is fixedly installed on the outside of the rotating shaft (4), and a first bevel gear (405) is installed at the lower end of the rotating shaft (4); a drive pulley (501) is fixedly installed on the output shaft of the geared motor (5), and the drive pulley (501) is connected to the passive pulley (404) by a belt.

7. The integrated pretreatment and pulp mixing device for recycled pulp fibers according to claim 1, characterized in that: The bottom of the sewage discharge housing (8) is connected to a base plate (801) by bolts, and a sealing gasket (804) is provided between the base plate (801) and the sewage discharge housing (8); a sewage pipe (802) is provided in the middle of the bottom end face of the base plate (801), and a solenoid valve (803) is installed on the sewage pipe (802).

8. The integrated pretreatment and pulp mixing device for recycled pulp fibers according to claim 6, characterized in that: The linkage unblocking mechanism (10) includes a crankshaft (1001), which is rotatably connected inside the sewage discharge housing (8). The crankshaft (1001) passes through the left and right side walls of the sewage discharge housing (8). Two cranks (1002) are installed on the crankshaft (1001). A journal (1009) is fixedly connected to the inner side of each crank (1002). A connecting rod (1003) is rotatably connected to the outer side of each journal (1009). The upper end of each connecting rod (1003) is rotatably connected to a shaft. Each lifting plate (1004) has a uniformly arranged unblocking rod (1005) on its upper surface; a guide slide cylinder (1006) is fixedly connected to the bottom surface of the lifting plate (1004), and a guide slide rod (1007) is slidably connected inside the guide slide cylinder (1006), and the guide slide rod (1007) is fixedly connected to the upper surface of the base plate (801); a second bevel gear (1008) is installed on the left end of the crankshaft (1001), and the second bevel gear (1008) meshes with the first bevel gear (405).

9. The integrated pretreatment and pulp mixing device for recycled pulp fibers according to claim 8, characterized in that: The diameter of the unclogging rod (1005) is smaller than the diameter of the mesh on the filter screen (306).

10. The integrated pretreatment and pulp mixing device for recycled pulp fibers according to claim 8, characterized in that: When the crankshaft (1001) is rotating, the upper ends of the unblocking rods (1005) on the two lifting plates (1004) are alternately inserted into the corresponding mesh holes on the filter screen (306).

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