A pulp recovery device for papermaking wastewater used in the production of light printing paper

Abstract

The present invention relates to the field of sewage treatment, and discloses a pulp recovery device from papermaking sewage for light printing paper production, comprising: a work frame; a sewage tank arranged on the top of the work frame; a fixed cylinder arranged at the bottom of the sewage tank, a recovery cylinder is arranged in the fixed cylinder, the recovery cylinder has multiple recovery chambers, and a first filter screen is arranged in the recovery chamber; in the present invention, the sewage tank is arranged to allow the papermaking sewage to be effectively drained into the recovery cylinder. The sewage is filtered through the first filter screen, which can effectively intercept flocculated solids and incompletely utilized pulp. This process ensures that the clear liquid enters the liquid inlet chamber smoothly, thereby realizing efficient solid-liquid separation and reducing resource waste. In summary, the present invention not only improves the efficiency and stability of sewage treatment, but also realizes the effective recovery of solid matter through effective solid-liquid separation, negative pressure mechanism, hot air drying, dynamic switching and solid matter recovery, and makes a positive contribution to sustainable development.

Description

Technical Field

[0001] The invention relates to the technical field of sewage, and in particular to a pulp recovery device from papermaking sewage for producing light printing paper. Background Art

[0002] In the production process of light printing paper, the treatment of papermaking wastewater has always been a major problem that troubles enterprises. Due to its special manufacturing process, light printing paper consumes a lot of water resources during the production process and produces a large amount of wastewater containing fibers, fillers and chemical additives. Papermaking wastewater usually contains a certain amount of incompletely utilized pulp, which not only leads to waste of resources, but also increases the difficulty of sewage treatment. If these pulps cannot be effectively recovered, the discharge of wastewater after treatment will cause pollution to the environment, especially in the context of increasingly stringent wastewater discharge standards, the recovery of pulp in sewage is particularly important. Traditional sewage treatment equipment usually uses a combination of flocculant mixing and filtration separation to treat sewage. In this process, by adding flocculants to the sewage, the suspended particles in the sewage are caused to aggregate into larger flocs, and then solid-liquid separation is performed through a filtration device. This treatment method improves the sewage purification efficiency to a certain extent and can recover part of the pulp.

[0003] In the process of filtering sewage, as the treatment time increases, a large amount of flocculated solids will gradually accumulate on the surface of the filter. These solids accumulate on the surface of the filter, causing the permeability of the filter to decrease, making it difficult for sewage to pass smoothly, and seriously affecting the filtration efficiency. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a pulp recovery device from papermaking wastewater for producing light printing paper, aiming to alleviate the above problems at least to a certain extent.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A pulp recovery device for papermaking wastewater used in the production of light printing paper, comprising:

[0007] Scaffolding;

[0008] A sewage tank disposed on the top of the work frame;

[0009] A fixed cylinder is arranged at the bottom of the sewage tank, wherein a recovery cylinder is arranged in the fixed cylinder, wherein the recovery cylinder has a plurality of recovery chambers, and a first filter is arranged in the recovery chamber;

[0010] A liquid inlet and a material outlet are provided on the fixed cylinder, one of the recovery chambers is communicated with the liquid inlet, and one of the recovery chambers is communicated with the material outlet;

[0011] A connecting cylinder disposed in the recovery cylinder is connected to the fixed cylinder, the connecting cylinder comprises an air-drying chamber, a liquid inlet chamber and a liquid discharge pipe, the liquid inlet chamber is in communication with the liquid discharge pipe, the liquid inlet chamber is in communication with one of the recovery chambers, the air-drying chamber is in communication with the remaining recovery chambers, and a piston is disposed in the liquid discharge pipe;

[0012] A filter bag arranged on the work frame is connected to the discharge port;

[0013] A rotating component disposed between the fixed cylinder and the recovery cylinder, used for intermittently rotating the recovery cylinder, so that one of the recovery chambers can be connected to the liquid inlet each time the recovery cylinder rotates by a preset angle;

[0014] The liquid discharge component is arranged in the liquid discharge pipe, and is used to reciprocate the position of the piston on a predetermined path in the liquid discharge pipe. When the piston moves away from the liquid inlet cavity, negative pressure can be formed in the liquid discharge pipe, and the sewage tank can be closed to stop the liquid from entering. When the piston moves close to the liquid inlet cavity, the liquid in the liquid discharge pipe can be released, and the sewage tank can be opened to continue the liquid from entering.

[0015] A hot air component disposed between the work frame and the air drying chamber, used for conveying hot air to the air drying chamber;

[0016] Wherein, each time the rotating component rotates the recovery cylinder to a predetermined angle, it can drive the discharge component to make the piston complete a reciprocating motion.

[0017] Preferably, the rotating component includes a rotating shaft rotatably connected to the drain pipe, one end of the rotating shaft extends to the outside of the drain pipe and is connected to a first gear, a second gear rotatably connected to the fixed cylinder and meshing with the first gear, a tooth groove meshing with the second gear is provided on one side of the recovery cylinder, and the first gear is an incomplete gear.

[0018] Preferably, the drainage component includes a screw connected to the rotating shaft, a threaded tube is threadedly connected to the screw, the threaded tube is connected to the piston, the drainage pipe is connected to a drain pipe extending to the outside of the drainage pipe, a first one-way valve is provided in the drain pipe, an inlet pipe is connected between the sewage tank and the liquid inlet, a second one-way valve is provided on the inlet pipe, and the screw is a reciprocating screw.

[0019] Preferably, the first one-way valve includes a connecting pipe connected to the drain pipe, a baffle is slidably connected inside the connecting pipe, a baffle adapted to the central opening of the baffle is connected to the connecting pipe, a first rod is connected to one end of the baffle, a second rod slidably connected to the first rod is connected to the piston, a first boss is slidably connected inside the second rod, a first slot is provided on the first rod and is sleeved with the first boss, and a first spring is connected between the first boss and the second rod.

[0020] Preferably, the second one-way valve comprises an air inlet pipe connected to the liquid inlet pipe, a frame is connected inside the air inlet pipe, a blocking piece is slidably connected to one side of the frame, and a second spring is connected between the blocking piece and the frame.

[0021] Preferably, the liquid inlet pipe is connected to a connecting plate, a plurality of first openings are formed on the connecting plate, a baffle is slidably connected inside the connecting plate, the baffle extends to the outside of the liquid inlet pipe, a plurality of second openings matched with the first openings are formed on the baffle, a third rod is connected to one side of the piston, a fourth rod is slidably connected to the third rod, the fourth rod passes through the liquid discharge pipe and is connected to the baffle, a second boss is slidably connected to the third rod, a second groove is formed on the fourth rod which is sleeved with the second boss, a third spring is connected between the second boss and the third rod, wherein the connecting plate and the baffle are located above the air inlet pipe.

[0022] Preferably, the hot air component includes a connecting ring arranged on one side of the connecting cylinder, the connecting ring is connected to a plurality of air supply pipes extending into the air drying chamber, the air supply pipes are provided with a plurality of air supply ports on a side facing the first filter, a hot air blower is provided on the work frame, and an air inlet pipe connected to the connecting ring is connected to the air outlet of the hot air blower.

[0023] Preferably, a plurality of second filters are provided on the outside of the fixed cylinder for ventilation.

[0024] Preferably, the work frame is connected with a discharge pipe, the discharge pipe is connected with a sleeve frame, and the opening of the filter bag is sleeved on the sleeve frame.

[0025] Preferably, the liquid discharge pipe is connected to a motor, and a drive shaft of the motor is connected to the rotating shaft.

[0026] In summary, the present invention mainly has the following beneficial effects:

[0027] 1. Efficient solid-liquid separation:

[0028] In the present invention, the provision of a sewage tank allows papermaking sewage to be effectively drained into the recovery drum. The sewage is filtered through the first filter screen, which can effectively intercept flocculated solids and incompletely utilized pulp. This process ensures that the clear liquid enters the liquid inlet chamber smoothly, thereby achieving efficient solid-liquid separation and reducing resource waste. On this basis, the rotating design of the recovery drum enables the recovery chambers to be used alternately. When the recovery drum rotates to a new working position, the solid matter in the previous recovery chamber can be effectively cleaned and processed after being dried with hot air, and the new recovery chamber is immediately ready for the next round of sewage treatment. Through this dynamic switching, the present invention not only improves the processing efficiency, but also significantly reduces downtime, ensuring a continuous and stable production process. In addition, the alternating use of the recovery chamber effectively avoids the accumulation and clogging risks of solid matter, thereby improving the stability and reliability of the present invention.

[0029] 2. Recovery drum rotation and negative pressure mechanism:

[0030] In the present invention, the rotation of the recovery cylinder is an important mechanism for the operation of the entire system. Every time the rotating component rotates to a predetermined angle, the piston is prompted to complete a reciprocating motion. When the piston moves to the left to the extreme position, the sewage tank is closed to form a negative pressure, and the liquid in the recovery chamber is sucked into the drain pipe. This negative pressure suction mechanism not only reduces the content of the liquid in the recovery chamber, but also helps the efficiency of the subsequent hot air drying process.

[0031] 3. Promote hot air drying:

[0032] In the present invention, after the liquid in the recovery chamber is reduced, the hot air component can transport hot air to the air drying chamber to further promote the evaporation of water in the solid matter. The rotation of the recovery cylinder allows the hot air to pass through the first filter screen to reach the recovery chamber, effectively drying the solid matter with hot air, significantly improving the drying efficiency of the solid matter and avoiding water residue.

[0033] 4. Reduce the risk of blockage by solid matter:

[0034] In the present invention, the flow force exerted by the hot air on the solid matter not only promotes the evaporation of water, but also reduces the adhesion of the solid matter. The hot air flow forms airflow disturbance, which can effectively clean the wet solid matter attached to the first filter screen and reduce the possibility of blockage. This design improves the efficiency and stability of the sewage treatment process, ensures the patency of the first filter screen, and reduces the risk of blockage caused by uneven evaporation of water. This effect ensures the patency of the first filter screen and improves the efficiency and stability of the entire sewage treatment system.

[0035] 5. Dynamic drying mechanism:

[0036] In the present invention, the design of the rotary recovery drum ensures that the solid matter is fully turned over during the drying process, avoiding agglomeration or adhesion, thereby improving the fluidity and reusability of the material. Through effective drying, the final recovered material not only has a low moisture content, but also has good operability.

[0037] 6. Solid matter recovery:

[0038] In the present invention, after the rotation of the collecting drum, the solid matter that has been dried finally reaches the discharge port. With the blowing of hot air, the solid matter enters the filter bag through the discharge port. The filter bag can effectively capture and store the dried solid matter. The design of the filter bag makes the collected solid matter convenient for subsequent processing and reuse. These dried solid matter not only reduces waste generation, but also can be used as high-quality recycled raw materials.

[0039] In summary, the present invention not only improves the efficiency and stability of sewage treatment, but also realizes the effective recovery of solid matter through effective solid-liquid separation, negative pressure mechanism, hot air drying, dynamic switching and solid matter recovery, and makes a positive contribution to sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0041] Figure 2 It is a schematic diagram of the structure of the sewage tank of the present invention;

[0042] Figure 3 It is a schematic diagram of the fixed cylinder structure of the present invention;

[0043] Figure 4 is another schematic diagram of the fixed cylinder structure of the present invention;

[0044] Figure 5 It is a schematic diagram of the structure of the liquid discharge pipe of the present invention;

[0045] Figure 6 It is a schematic diagram of the connecting pipe structure of the present invention;

[0046] Figure 7 is a schematic diagram of the first boss structure of the present invention;

[0047] Figure 8 yes Figure 5 A schematic diagram of the enlarged local structure at point A in the middle;

[0048] Fig. 9 yes Figure 5 A magnified schematic diagram of the local structure at B in the middle;

[0049] Fig.10 It is a schematic diagram of the connecting plate structure of the present invention.

[0050] Reference numerals:

[0051] 100, work frame; 101, sewage tank; 102, fixed cylinder; 103, recovery cylinder; 104, recovery chamber; 105, first filter screen; 106, liquid inlet; 107, connecting cylinder;

[0052] 108, air drying chamber; 109, liquid inlet chamber; 110, liquid discharge pipe; 111, piston; 112, filter bag; 113, discharge pipe; 114, sleeve frame; 115, discharge port; 116, second filter screen;

[0053] 200, rotating shaft; 201, first gear; 202, second gear; 203, tooth groove; 204, motor;

[0054] 300, lead screw; 301, threaded pipe; 302, drain pipe; 303, liquid inlet pipe; 304, connecting pipe; 305, blocking piece; 306, block; 307, first rod; 308, second rod; 309, first boss; 310, first slot; 311, first spring; 312, air inlet pipe; 313, frame; 314, blocking piece; 315, second spring;

[0055] 400, connecting plate; 401, first opening; 402, baffle; 403, second opening; 404, third rod; 405, fourth rod; 406, second boss; 407, second slot; 408, third spring;

[0056] 500, connecting ring; 501, air supply pipe; 502, air supply port; 503, hot air blower; 504, air inlet pipe. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] refer to Figure 1-Figure 10 , a pulp recovery device for papermaking wastewater used in the production of light printing paper, comprising:

[0059] Scaffolding 100;

[0060] A sewage tank 101 is provided on the top of the work frame 100;

[0061] A fixed cylinder 102 is disposed at the bottom of the sewage tank 101, and a recovery cylinder 103 is disposed in the fixed cylinder 102. The recovery cylinder 103 has a plurality of recovery chambers 104, and a first filter screen 105 is disposed in the recovery chamber 104;

[0062] A liquid inlet 106 and a material outlet 115 are provided on the fixed cylinder 102, one of the recovery chambers 104 is communicated with the liquid inlet 106, and one of the recovery chambers 104 is communicated with the material outlet 115;

[0063] The connecting cylinder 107 disposed in the recovery cylinder 103 is connected to the fixed cylinder 102. The connecting cylinder 107 includes an air-drying chamber 108, a liquid inlet chamber 109 and a liquid discharge pipe 110. The liquid inlet chamber 109 is in communication with the liquid discharge pipe 110. The liquid inlet chamber 109 is in communication with one of the recovery chambers 104. The air-drying chamber 108 is in communication with the remaining recovery chambers 104. A piston 111 is disposed in the liquid discharge pipe 110.

[0064] The filter bag 112 disposed on the work frame 100 is communicated with the discharge port 115;

[0065] The rotating component disposed between the fixed cylinder 102 and the recovery cylinder 103 is used to intermittently rotate the recovery cylinder 103, so that one of the recovery chambers 104 can be connected to the liquid inlet 106 every time the recovery cylinder 103 rotates by a preset angle;

[0066] The liquid discharge component disposed in the liquid discharge pipe 110 is used to reciprocate the position of the piston 111 on a predetermined path in the liquid discharge pipe 110. When the piston 111 moves away from the liquid inlet chamber 109, negative pressure can be formed in the liquid discharge pipe 110, and the sewage tank 101 is closed to stop the liquid from entering. When the piston 111 moves closer to the liquid inlet chamber 109, the liquid in the liquid discharge pipe 110 can be released, and the sewage tank 101 can be opened to continue the liquid from entering.

[0067] A hot air component disposed between the work frame 100 and the air drying chamber 108, for delivering hot air to the air drying chamber 108;

[0068] Wherein, each time the rotating component rotates the recovery cylinder 103 to a predetermined angle, it can drive the liquid discharge component to make the piston 111 complete a reciprocating motion;

[0069] By setting up the sewage tank 101, the papermaking sewage can be poured or drained into the sewage tank 101. The operator can turn on the rotating component. Each time the rotating component rotates the recovery cylinder 103 to a predetermined angle, it can drive the discharge component to make the piston 111 complete a reciprocating motion, that is, when the recovery cylinder 103 is in a stationary state, the piston 111 will move continuously in the discharge pipe 110. In the initial state, the piston 111 is at the extreme position at the rightmost end of the discharge pipe 110. When working, the piston 111 will move toward the liquid inlet chamber 109. At this time, the sewage tank 101 is opened, and the liquid in the sewage tank 101 can enter the recovery chamber 104 on the recovery cylinder 103 through the liquid inlet 106 on the fixed cylinder 102. The first filter screen 105 in the recovery cylinder 103 is used to filter the wastewater from the papermaking wastewater, and the first filter screen 105 in the recovery cylinder 103 is used to filter the wastewater from the papermaking wastewater. The first filter screen 105 can effectively intercept the flocculated solids and the incompletely utilized pulp in the papermaking wastewater when the liquid passes through the first filter screen 105. The clear liquid after the liquid passes through the first filter screen 105 enters the drain pipe 110 through the liquid inlet chamber 109. The filtered liquid in the drain pipe 110 can be discharged from the drain pipe 110. When the liquid in the sewage tank 101 passes through the first filter screen 105 in the recovery cylinder 103, the first filter screen 105 can effectively intercept the flocculated solids and the incompletely utilized pulp in the papermaking wastewater, ensuring that the solid matter in the wastewater is effectively separated, and the clear liquid smoothly passes through the first filter screen 105 and enters the liquid inlet chamber 109. Through this solid-liquid separation process, the pulp in the papermaking wastewater can be effectively recovered, reducing the waste of resources. At the same time, solid matter is prevented from entering the subsequent drainage link, ensuring the purity of the clear liquid. When the piston 111 moves to the left to the extreme position, it begins to reset to the right. During this process, the sewage tank 101 is closed, the entry of sewage is stopped, and negative pressure is gradually formed in the drainage pipe 110. At this time, the liquid in the recovery chamber 104 is sucked into the drainage pipe 110 under the action of negative pressure, reducing the content of the liquid in the recovery chamber 104, so as to ensure that the humidity in the recovery chamber 104 is reduced during the subsequent hot air drying work, thereby improving the drying efficiency.When the liquid content in the recovery chamber 104 decreases, the hot air component can transport hot air to the air-drying chamber 108 to promote the evaporation of residual moisture. When the piston 111 is about to reach the limit position when it returns to the right, the recovery cylinder 103 rotates a predetermined angle to allow one of the recovery chambers 104 that has been filtered to leave the liquid inlet 106 and communicate with the air-drying chamber 108, and to allow one of the clean recovery chambers 104 to reach the position between the liquid inlet 109 and the liquid inlet 106, and communicate with the liquid inlet 106 and the liquid inlet chamber 109. When the rotating component continues to work, the piston 111 moves to the right to the limit position and then begins to move to the left. At this time, the sewage tank 101 is opened, and liquid can enter the recovery chamber 104. With the inflow of liquid, the flocculated solids and unused pulp in the sewage will be effectively intercepted by the first filter screen 105 under the action of gravity and flow, ensuring the smooth passage of the clear liquid. Through this circulation process, the present invention continuously separates the solid matter and slurry in the sewage, improves the water utilization rate and reduces the pollution of sewage. For a recovery chamber 104 with flocculated solids, after being connected with the air-drying chamber 108, the hot air transported to the air-drying chamber 108 by the hot air component can pass through the first filter screen 105 to reach the recovery chamber 104, and the solid matter in the recovery chamber 104 can be dried by hot air. In this way, the flocculated solids in the recovery chamber 104 will accelerate the evaporation of water under the action of hot air, and significantly reduce its humidity. This process not only helps to effectively recycle pulp, but also converts the recovered solid matter into dry reusable materials. When the rotating parts continue to work, the solid matter dried by hot air will go through multiple rotation conversion positions following the recovery drum 103. By utilizing the multiple recovery chambers 104 on the recovery drum 103, the solid matter can be dried for a longer period of time, and the drying time of the solid matter can be extended, thereby ensuring that its moisture is fully evaporated to achieve an ideal drying effect. In addition, when the hot air in the air-drying chamber 108 passes through the first filter screen 105 and reaches the recovery chamber 104, the hot air will quickly heat the solid matter to evaporate its moisture. The hot air can not only quickly heat the solid matter to evaporate its moisture, but also reduce adhesion and reduce the risk of blockage. It can also exert impact force on the surface of the first filter screen 105 through the disturbance of the air flow, thereby helping to clean up the attached wet solid matter. At the same time, the flow of hot air will form air flow disturbance, causing the solid matter on the first filter screen 105 to fall off, thereby reducing the possibility of blockage. Through the drying and cleaning effect of hot air on wet solid matter, the present invention can effectively keep the first filter screen 105 unobstructed, avoid blockage, and ensure the efficiency and stability of the sewage treatment process. This design not only improves the recovery rate of pulp, but also reduces resource waste, helps to achieve environmental protection and sustainable development goals, and with the rotation of the recovery drum 103, the surface of the solid matter will also be effectively turned over, avoiding local overheating or uneven drying caused by stillness.This dynamic drying method not only improves the drying efficiency, but also prevents the solid matter from agglomerating or sticking during the drying process, so that the final recovered material has good fluidity and reusability. Through this efficient hot air drying mechanism, the recovered solid matter can be further converted into reusable raw materials, reducing the cost of waste disposal and promoting the recycling of resources. In addition, the optimized process also improves the economy and environmental protection of the entire system, and contributes positively to the sustainable development of the papermaking industry. With the continuous operation of the rotating parts, after the rotation of the recovery drum 103, the finally dried solid matter will reach the discharge port 115. With the blowing of hot air, the solid matter will enter the filter bag 112 through the discharge port 115. The filter bag 112 can effectively capture and store the dried solid matter. Through the above mechanism, the present invention can not only ensure the patency of the first filter screen 105, but also improve the efficiency of the entire solid-liquid separation process, and finally ensure that the recovered clear liquid is of good quality, thereby achieving the goal of effectively recovering pulp and reducing resource waste. With the continuous operation of the sewage treatment system, the cleaning and anti-blocking functions of the first filter 105 provide strong protection for the entire process and contribute to the sustainable development of the papermaking industry.

[0070] As a further solution of the present invention, the rotating component includes a rotating shaft 200 rotatably connected to the discharge pipe 110, one end of the rotating shaft 200 extends to the outside of the discharge pipe 110 and is connected to a first gear 201, a second gear 202 meshing with the first gear 201 is rotatably connected to the fixed cylinder 102, a tooth groove 203 meshing with the second gear 202 is opened on one side of the recovery cylinder 103, and the first gear 201 is an incomplete gear;

[0071] By setting the rotating shaft 200, the rotating shaft 200 can be rotated when applied, and the design of the rotating shaft 200, the first gear 201, the second gear 202 and the tooth groove 203 enables the recovery tube 103 to work efficiently and smoothly. Each time the rotating shaft 200 rotates, the meshing of the first gear 201 and the second gear 202 transmits the rotational power, prompting the second gear 202 to rotate, thereby driving the recovery tube 103 to rotate to a preset angle. The present invention realizes the alternating connection of multiple recovery chambers 104 on the recovery tube 103 with the liquid inlet 106 through the transmission mechanism of the tooth groove 203. The alternating use of the recovery chamber 104 effectively improves the continuity of sewage treatment, reduces the system downtime, and ensures the stability of the production process. The rotation of the rotating shaft 200 enables the system to dynamically adjust the working state of the recovery chamber 104 during operation, and optimizes the work efficiency according to the real-time needs of sewage treatment. When a recovery chamber 104 completes the treatment, the continued rotation of the rotating shaft 200 can quickly switch to the next recovery chamber 104, ensuring the efficiency and continuity of the treatment process.

[0072] As a further solution of the present invention, the liquid discharge component includes a screw 300 connected to the rotating shaft 200, a threaded tube 301 is threadedly connected to the screw 300, the threaded tube 301 is connected to the piston 111, a drain pipe 302 extending to the outside of the drain pipe 110 is connected to the drain pipe 110, a first one-way valve is provided in the drain pipe 302, a liquid inlet pipe 303 is connected between the sewage tank 101 and the liquid inlet 106, a second one-way valve is provided on the liquid inlet pipe 303, and the screw 300 is a reciprocating screw 300;

[0073] By setting the lead screw 300, in the initial state, the piston 111 is at the extreme position at the rightmost end of the discharge pipe 110, and the first gear 201 and the second gear 202 are in a disengaged state. When the rotating shaft 200 rotates, the lead screw 300 and the first gear 201 can be driven to rotate. When the lead screw 300 rotates, the threaded tube 301 can be moved by the force of the thread. The threaded tube 301 and the piston 111 can move to the right close to the liquid inlet chamber 109. At this time, the first one-way valve is opened, the second one-way valve is closed, and the liquid inlet pipe 303 is opened. The liquid can enter the liquid inlet chamber 109 and the discharge pipe 110 through the liquid inlet pipe 303, and finally from the drain pipe 303. 02 discharge, when the shaft 200 rotates half a circle to allow the first gear 201 to rotate half a circle, the piston 111 moves to the right to the limit position and starts to move to the left away from the liquid inlet chamber 109. At this time, the first one-way valve is closed, the second one-way valve is opened, and the liquid inlet pipe 303 is closed. As the piston 111 moves, a negative pressure gradually forms in the discharge pipe 110. The negative pressure formed in the discharge pipe 110 can effectively extract the liquid above the first filter screen 105. After the second one-way valve is opened, the external air can enter the liquid inlet chamber 109. This process supplements the negative pressure caused by the reduction of liquid, so that the present invention remains stable at all stages of liquid treatment. This dynamic adjustment mechanism not only improves the extraction efficiency of sewage, but also ensures the balance and stable operation of the entire treatment system: as the liquid is extracted, the moisture content of the solid matter decreases, providing good conditions for the subsequent hot air drying process. This not only improves the drying efficiency, but also prevents moisture residue.

[0074] As a further solution of the present invention, the first one-way valve includes a connecting pipe 304 connected to the drain pipe 302, a baffle 305 is slidably connected in the connecting pipe 304, a baffle 306 adapted to the central opening of the baffle 305 is connected to the connecting pipe 304, a first rod 307 is connected to one end of the baffle 305, a second rod 308 slidably connected to the first rod 307 is connected to the piston 111, a first boss 309 is slidably connected inside the second rod 308, a first slot 310 is provided on the first rod 307 and sleeved with the first boss 309, and a first spring 311 is connected between the first boss 309 and the second rod 308;

[0075] By setting the baffle 305, when the piston 111 is at the rightmost end in the discharge pipe 110, the baffle 305 and the block 306 are sleeved, and the connecting pipe 304 is in a closed state. When the piston 111 moves to the right, it can drive the second rod 308 to move to the right, and can drive the first rod 307 to move through the first boss 309, the first spring 311 and the first groove 310. The movement of the first rod 307 can disengage the baffle 305 from the block 306. At this time, the liquid can flow out through the central opening of the baffle 305 to achieve drainage. When the piston 111 continues to move, the first groove 310 can disengage from the first boss 309, and the first spring 311 can generate potential energy. , until the first boss 309 moves to the next first slot 310, the first boss 309 can be again sleeved with a corresponding first slot 310, that is, when the piston 111 moves to the right to the limit position and then returns to the left, the first boss 309, the first slot 310 and the first spring 311 can timely allow the baffle 305 to be again sleeved on the block 306, and the connecting pipe 304 is closed, so that the drain pipe 302 can be closed when the piston 111 returns to the left, so that a negative pressure is formed in the drain pipe 110. At this time, the content of the liquid in the recovery chamber 104 gradually decreases, thereby promoting the absorption of the liquid above the first filter 105. This design not only improves the efficiency of liquid discharge, but also ensures that the system can effectively discharge and absorb liquid in each reciprocating motion, ensuring the continuity and stability of the overall liquid treatment process. Through this dynamic closing and opening mechanism, the system can quickly respond to the needs under different working conditions, thereby achieving efficient liquid recovery and treatment.

[0076] As a further solution of the present invention, the second one-way valve includes an air inlet pipe 312 connected to the liquid inlet pipe 303, a frame 313 is connected inside the air inlet pipe 312, a blocking piece 314 is slidably connected to one side of the frame 313, and a second spring 315 is connected between the blocking piece 314 and the frame 313;

[0077] By setting the second spring 315, the second spring 315 can limit the position of the sealing piece 314, and can close one side of the frame 313 to prevent the liquid in the liquid inlet pipe 303 from flowing out. When negative pressure is formed in the discharge pipe 110, the liquid will enter the liquid inlet cavity 109 through the first filter screen 105. At this time, negative pressure is formed in the liquid inlet pipe 303, and the negative pressure can absorb the sealing piece 314. The sealing piece 314 can be displaced, and the gas can enter the liquid inlet pipe 303 through the frame 313. This process ensures that the negative pressure in the liquid inlet pipe 303 can be supplemented and the pressure balance in the system is maintained. Through this structure, the gas flow in the liquid inlet pipe 303 can ensure the stability of the system under negative pressure conditions.

[0078] As a further solution of the present invention, the liquid inlet pipe 303 is connected to a connecting plate 400, a plurality of first openings 401 are provided on the connecting plate 400, a baffle 402 is slidably connected inside the connecting plate 400, the baffle 402 extends to the outside of the liquid inlet pipe 303, a plurality of second openings 403 adapted to the first openings 401 are provided on the baffle 402, a third rod 404 is connected to one side of the piston 111, a fourth rod 405 is slidably connected to the third rod 404, the fourth rod 405 passes through the liquid discharge pipe 110 and is connected to the baffle 402, a second boss 406 is slidably connected to the third rod 404, a second slot 407 sleeved with the second boss 406 is provided on the fourth rod 405, a third spring 408 is connected between the second boss 406 and the third rod 404, wherein the connecting plate 400 and the baffle 402 are located above the air inlet pipe 312;

[0079] By setting the connecting plate 400 and the baffle 402, in the initial state, the second opening 403 on the baffle 402 is staggered with the first opening 401, and the liquid can be blocked from entering the liquid inlet chamber 109. When the piston 111 moves to the left, the baffle 402 can be moved by the third rod 404, the second boss 406, the third spring 408, the second slot 407 and the fourth rod 405. The movement of the baffle 402 can make the second opening 403 communicate with the first opening 401. At this time, the liquid can enter the liquid inlet chamber 109, and the purpose of conveying sewage is achieved. When the baffle 402 moves to the extreme position, the second boss 406 is connected to the first slot 407 by the third spring 408. The three springs 408 are set to jump on multiple second slots 407. When the piston 111 moves to the right to the extreme position and starts to reset, the baffle 402 can be reset in time through the third rod 404, the second boss 406, the third spring 408, the second slot 407 and the fourth rod 405 to cooperate with the reset in the discharge pipe 110 to achieve the purpose of extracting the liquid above the first filter 105. In summary, through the ingenious design of the connecting plate 400 and the baffle 402, not only the controlled delivery of the liquid is achieved, but also it is ensured that the system can respond quickly under different working conditions to achieve effective sewage treatment. This dynamic fluid control mechanism greatly improves the operational flexibility and processing capacity of the entire system, making sewage treatment more efficient and stable.

[0080] As a further solution of the present invention, the hot air component includes a connecting ring 500 provided on one side of the connecting tube 107, the connecting ring 500 is connected with a plurality of air supply pipes 501 extending into the air drying chamber 108, the air supply pipe 501 is provided with a plurality of air supply ports 502 on one side facing the first filter screen 105, a hot air blower 503 is provided on the work frame 100, and an air inlet pipe 504 connected to the connecting ring 500 is connected to the air outlet of the hot air blower 503;

[0081] As a further solution of the present invention, a plurality of second filters 116 are provided outside the fixed cylinder 102 for ventilation;

[0082] By setting up the hot air blower 503, hot air can be effectively sent into the connecting ring 500 and distributed to the air-drying chamber 108 through the air supply pipe 501. The air outlet of the hot air blower 503 is connected to the connecting ring 500 through the air inlet pipe 504, so that the hot air can quickly and evenly enter the air-drying chamber 108, providing sufficient hot air support for the first filter screen 105 on the recovery chamber 104. This design not only improves the overall efficiency of the system, but also ensures that rapid and uniform heating can be achieved during the air-drying process. The multiple air supply ports 502 on the air supply pipe 501 directly face the first filter screen 105, ensuring that the hot air can be concentrated on the surface of the first filter screen 105, effectively accelerating the evaporation and removal of water on the first filter screen 105. In this way, the water removal efficiency can be significantly improved and the air-drying time can be shortened. In addition, the multiple second filter screens 116 outside the fixed cylinder 102 are used for ventilation, which further enhances the air mobility of the system, ensures that fresh air can be replenished and enter, and forms a good cycle. In general, the setting of the hot air component enables the system to not only efficiently deliver hot air during the sewage treatment process, but also improve the drying effect of the first filter 105 by optimizing the airflow. This effectively improves the efficiency of the entire treatment process, allowing the first filter 105 to quickly return to a dry state after use, ensuring the continuous and stable operation of the system.

[0083] As a further solution of the present invention, the work frame 100 is connected to a discharge pipe 113, the discharge pipe 113 is connected to a sleeve frame 114, and the opening of the filter bag 112 is sleeved on the sleeve frame 114;

[0084] By providing the sleeve 114, the filter bag 112 can be fixed to the sleeve 114 by an elastic rope during use, thereby ensuring that the filter bag 112 remains stable and does not easily fall off during operation. The design of the sleeve 114 allows the filter bag 112 to be easily installed and removed. The user only needs to easily pull the elastic rope to quickly replace the filter bag 112, thereby improving the convenience and efficiency of operation.

[0085] As a further solution of the present invention, a motor 204 is connected to the liquid discharge pipe 110, and a driving shaft of the motor 204 is connected to the rotating shaft 200;

[0086] By providing the motor 204, the rotating shaft 200 can be automatically driven, thereby improving the working efficiency of the system. The connection between the drive shaft of the motor 204 and the rotating shaft 200 enables the motor 204 to accurately control the rotation speed and direction of the rotating shaft 200. During this process, the rotation of the rotating shaft 200 can achieve continuous discharge and extraction of liquid at a preset rate and frequency, thereby optimizing the entire liquid treatment process.

[0087] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pulp recovery device for papermaking wastewater used in the production of light printing paper, characterized in that: include: Scaffold (100); A sewage tank (101) disposed on the top of the work frame (100); A fixed cylinder (102) is arranged at the bottom of the sewage tank (101), a recovery cylinder (103) is arranged in the fixed cylinder (102), the recovery cylinder (103) has a plurality of recovery chambers (104), and a first filter screen (105) is arranged in the recovery chamber (104); A liquid inlet (106) and a material outlet (115) are provided on the fixed cylinder (102), wherein one of the recovery chambers (104) is in communication with the liquid inlet (106), and one of the recovery chambers (104) is in communication with the material outlet (115); a connecting cylinder (107) disposed in the recovery cylinder (103) and connected to the fixed cylinder (102); the connecting cylinder (107) comprising an air-drying chamber (108), a liquid inlet chamber (109) and a liquid discharge pipe (110); the liquid inlet chamber (109) is in communication with the liquid discharge pipe (110); the liquid inlet chamber (109) is in communication with one of the recovery chambers (104); the air-drying chamber (108) is in communication with the remaining recovery chambers (104); and a piston (111) is disposed in the liquid discharge pipe (110); A filter bag (112) disposed on the work frame (100) and connected to the discharge port (115); a rotating component disposed between the fixed cylinder (102) and the recovery cylinder (103), used for intermittently rotating the recovery cylinder (103), such that each time the recovery cylinder (103) rotates by a preset angle, one of the recovery chambers (104) can be connected to the liquid inlet (106); A liquid discharge component disposed in the liquid discharge pipe (110) is used to reciprocate the position of the piston (111) on a predetermined path in the liquid discharge pipe (110); when the piston (111) moves away from the liquid inlet chamber (109), negative pressure is formed in the liquid discharge pipe (110), and the sewage tank (101) is closed to stop liquid inlet; when the piston (111) moves closer to the liquid inlet chamber (109), liquid in the liquid discharge pipe (110) is released, and the sewage tank (101) is opened to continue liquid inlet; A hot air component provided between the work frame (100) and the air drying chamber (108), used for conveying hot air to the air drying chamber (108); Wherein, each time the rotating component rotates the recovery cylinder (103) to a predetermined angle, it can drive the liquid discharge component to cause the piston (111) to complete a reciprocating motion.

2. The pulp recovery equipment from papermaking wastewater for light printing paper production according to claim 1, characterized in that: The rotating component comprises a rotating shaft (200) rotatably connected to the inside of the liquid discharge pipe (110), one end of the rotating shaft (200) extends to the outside of the liquid discharge pipe (110) and is connected to a first gear (201), a second gear (202) meshing with the first gear (201) is rotatably connected to the fixed cylinder (102), a tooth groove (203) meshing with the second gear (202) is provided on one side of the recovery cylinder (103), and the first gear (201) is an incomplete gear.

3. The pulp recovery equipment from papermaking wastewater for light printing paper production according to claim 2, characterized in that: The liquid discharge component comprises a lead screw (300) connected to the rotating shaft (200), a threaded tube (301) being threadedly connected to the lead screw (300), the threaded tube (301) being connected to the piston (111), a drainage pipe (302) extending to the outside of the drainage pipe (110) being connected to the drainage pipe (110), a first non-return valve being arranged in the drainage pipe (302), a liquid inlet pipe (303) being connected between the sewage tank (101) and the liquid inlet (106), a second non-return valve being arranged on the liquid inlet pipe (303), and the lead screw (300) being a reciprocating lead screw.

4. The pulp recovery equipment from papermaking wastewater for light printing paper production according to claim 3, characterized in that: The first one-way valve comprises a connecting pipe (304) connected to the drain pipe (302), a baffle (305) being slidably connected inside the connecting pipe (304), a baffle (306) being connected to the connecting pipe (304) and being adapted to the central opening of the baffle (305), a first rod (307) being connected to one end of the baffle (305), a second rod (308) being slidably connected to the first rod (307) being connected to the piston (111), a first boss (309) being slidably connected inside the second rod (308), a first slot (310) being provided on the first rod (307) and being sleeved with the first boss (309), and a first spring (311) being connected between the first boss (309) and the second rod (308).

5. The pulp recovery equipment from papermaking wastewater for light printing paper production according to claim 3, characterized in that: The second one-way valve comprises an air inlet pipe (312) connected to the liquid inlet pipe (303); a frame (313) is connected inside the air inlet pipe (312); a blocking piece (314) is slidably connected to one side of the frame (313); and a second spring (315) is connected between the blocking piece (314) and the frame (313).

6. The pulp recovery equipment from papermaking wastewater for light printing paper production according to claim 4, characterized in that: The liquid inlet pipe (303) is connected to a connecting plate (400), a plurality of first openings (401) are formed on the connecting plate (400), a baffle (402) is slidably connected inside the connecting plate (400), the baffle (402) extends to the outside of the liquid inlet pipe (303), a plurality of second openings (403) are formed on the baffle (402) and are matched with the first openings (401), a third rod (404) is connected to one side of the piston (111), and a third rod (404) is slidably connected to the third rod (404). Four rods (405), the fourth rod (405) passes through the liquid discharge pipe (110) and is connected to the baffle plate (402), the third rod (404) is slidably connected to a second boss (406), the fourth rod (405) is provided with a second slot (407) sleeved with the second boss (406), a third spring (408) is connected between the second boss (406) and the third rod (404), wherein the connecting plate (400) and the baffle plate (402) are located above the air intake pipe (312).

7. The pulp recovery equipment from papermaking wastewater for light printing paper production according to claim 1, characterized in that: The hot air component comprises a connecting ring (500) arranged on one side of the connecting tube (107); the connecting ring (500) is connected to a plurality of air supply pipes (501) extending into the air drying chamber (108); a plurality of air supply ports (502) are provided on a side of the air supply pipe (501) facing the first filter screen (105); a hot air blower (503) is provided on the work frame (100); an air outlet of the hot air blower (503) is connected to an air inlet pipe (504) connected to the connecting ring (500).

8. The pulp recovery equipment from papermaking wastewater for light printing paper production according to claim 1, characterized in that: A plurality of second filter screens (116) are provided outside the fixed cylinder (102) for ventilation.

9. The pulp recovery equipment from papermaking wastewater for light printing paper production according to claim 1, characterized in that: The work frame (100) is connected to a discharge pipe (113), the discharge pipe (113) is connected to a sleeve frame (114), and the opening of the filter bag (112) is sleeved on the sleeve frame (114).

10. The pulp recovery equipment from papermaking wastewater for light printing paper production according to claim 2, characterized in that: The liquid discharge pipe (110) is connected to a motor (204), and a drive shaft of the motor (204) is connected to the rotating shaft (200).

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