Waste paper recovery wastewater treatment device

Abstract

A waste paper recovery wastewater treatment device belongs to the field of papermaking wastewater treatment and comprises a fiber picking mechanism and an extrusion treatment mechanism, the fiber picking mechanism comprises a primary treatment box, a rake roller and a fiber discharge plate, the rake roller is rotatably arranged in the primary treatment box, and the fiber discharge plate is arranged at the discharge end of the rake roller; the extrusion treatment mechanism comprises a secondary treatment box, a grate water barrel and a first spiral blade, the grate water barrel is arranged in the secondary treatment box, and the first spiral blade is rotationally arranged on the inner side of the grate water barrel. Wastewater is treated through the primary treatment box, large-size fiber substances in the wastewater are picked away and collected through the rotating rake roller, and then the large-size fiber substances are transferred to the fiber discharging plate to be guided out through the rake roller; then the wastewater treated by the primary treatment tank is conveyed into the secondary treatment tank, and is filtered by the grate water barrel, so that fibrous substances in the wastewater can be collected and utilized to the maximum extent, and the quality of the wastewater is improved.

Description

Technical Field

[0001] This invention relates to the field of papermaking wastewater treatment technology, specifically to a waste paper recycling wastewater treatment device. Background Technology

[0002] Waste paper recycling is a crucial link in resource recycling, and its process mainly includes steps such as waste paper collection, sorting, shredding, screening, deinking, bleaching, and papermaking. First, the recycled waste paper is sorted manually or mechanically to remove impurities such as plastics, metals, and sand. Then, it enters a shredding device where it is broken down into pulp by water and chemical agents (such as sodium hydroxide and sodium silicate). Next, large, un-shredded impurities are separated by screening equipment, resulting in relatively pure pulp. For printing waste paper, deinking is required, using flotation or washing methods to remove ink particles. Bleaching is performed if necessary to improve pulp brightness. Finally, the treated pulp is used to make new paper or paperboard. The aforementioned processing generates a large amount of wastewater containing a significant amount of fibrous material. These fibers have high recycling value and can be reused in pulping. However, existing wastewater treatment technologies primarily focus on removing pollutants such as suspended solids and COD, with low efficiency in recovering fibrous material (derived from residual paper). This results in a significant amount of fiber remaining in the treated wastewater, leading not only to resource waste but also to excessive suspended solids concentrations that fail to meet emission standards, thus increasing environmental pressure. Summary of the Invention

[0003] In view of the above situation and to overcome the defects of the prior art, the purpose of the present invention is to provide a waste paper recycling wastewater treatment device to at least partially solve the problems mentioned in the background art.

[0004] Therefore, the purpose of this invention is to provide a waste paper recycling wastewater treatment device that maximizes the collection and utilization of fibrous materials in wastewater and improves wastewater quality.

[0005] To achieve the above objectives, the present invention proposes a wastewater treatment device for waste paper recycling, comprising a fiber picking mechanism and a pressing mechanism. The fiber picking mechanism includes a primary treatment box, a rake roller, and a fiber discharge plate. The rake roller is rotatably disposed inside the primary treatment box, and the fiber discharge plate is disposed at the discharge end of the rake roller. The pressing mechanism includes a secondary treatment box, a grate cylinder, and a first spiral blade. The feed end of the secondary treatment box is connected to the bottom of the primary treatment box via a guide pipe. The grate cylinder is disposed inside the secondary treatment box, and the first spiral blade is rotatably disposed inside the grate cylinder.

[0006] Furthermore, a fiber outlet is provided on one side of the primary processing box, and the fiber outlet plate is inclinedly arranged at the bottom of the fiber outlet. A carding plate is provided on the fiber outlet plate, and carding grooves are provided on the carding plate. Rake teeth are provided on the rake roller, and the rake teeth are adapted to the carding grooves. The rake teeth are made of elastic material.

[0007] Furthermore, a filter plate is provided inside the primary treatment box. The filter plate is located below the rake roller, and the upper surface of the filter plate is in contact with the rake teeth.

[0008] Furthermore, the upper surface of the filter plate is a concave arc-shaped structure, a baffle is provided on one side of the filter plate, and a feeding hopper is provided on the other side, with the feeding hopper extending to the outside of the primary treatment box.

[0009] Furthermore, the surface of the grate cylinder is provided with grate mesh holes, and the edge portion of the first spiral blade is provided with a scraping blade, which is in contact with the inner wall of the grate cylinder.

[0010] Furthermore, a drive shaft is provided on the inner side of the first spiral blade, and a slag conveying pipe is provided at the discharge end of the grate cylinder. The inner diameter of the slag conveying pipe is smaller than the inner diameter of the grate cylinder. A second spiral blade is provided on the inner side of the slag conveying pipe. The second spiral blade is mounted on the drive shaft. An extrusion drive motor is provided on the outside of the slag conveying pipe. The output shaft of the extrusion drive motor is connected to the drive shaft. A fiber outlet is provided at the bottom of the slag conveying pipe.

[0011] Furthermore, the top of the secondary processing box is provided with an air vent, the bottom of the secondary processing box is provided with a water collection tank, the feed end of the grate cylinder is provided with a feed storage tank, and a grate cylinder support is provided on the outside of the grate cylinder.

[0012] Furthermore, the fiber discharge plate is provided with a conveyor belt at its discharge end. The conveyor belt is a mesh-like perforated conveyor belt. A filtered water collection tank is provided below the conveyor belt. A first recovery pipe is provided at the discharge end of the filtered water collection tank.

[0013] Furthermore, a second recovery pipe is provided at the bottom of the primary treatment tank, and a back suction pump is provided at the output ends of the first and second recovery pipes. The discharge end of the back suction pump is connected to the feed end of the grate cylinder.

[0014] Beneficial effects: This invention treats wastewater in a primary treatment tank, where a rotating rake roller picks out and collects larger fibers. The rake roller then transfers the larger fibers to a fiber discharge plate for discharge. The wastewater, after primary treatment, is then transferred to a secondary treatment tank, where it is filtered through a grate. Smaller fibers are trapped on the inner wall of the grate, and then the first spiral blades continuously push the accumulated fibers to the right and carry them away. This process maximizes the collection and utilization of fibers in the wastewater, improving wastewater quality.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the overall structure of a waste paper recycling wastewater treatment device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a waste paper recycling wastewater treatment device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the waste paper recycling wastewater treatment device from another perspective according to an embodiment of the present invention; Figure 4 A cross-sectional view of a fiber picking mechanism in a waste paper recycling wastewater treatment device according to an embodiment of the present invention; Figure 5 This is a cross-sectional view of the extrusion processing mechanism in a waste paper recycling wastewater treatment apparatus according to an embodiment of the present invention; Figure 6 for Figure 5 A magnified view of A in the middle.

[0017] As shown in the figure: 1. Fiber picking mechanism; 11. Primary processing box; 12. Fiber outlet; 13. Fiber outlet plate; 131. Carding plate; 14. Conveyor belt; 141. Conveyor belt drive roller; 15. Filter water collection tank; 151. First recovery pipe; 16. Feed hopper; 17. Rake roller drive motor; 18. Rake roller; 181. Rake roller drive shaft; 182. Rake teeth; 19. Filter plate; 191. Baffle; 192. Second recovery pipe. 193. Backflow pump; 2. Extrusion processing mechanism; 21. Feed storage tank; 211. Guide pipe; 22. Secondary processing box; 221. Water collection tank; 222. Drain outlet; 23. Air vent; 24. Slag transfer pipe; 241. Extrusion drive motor; 242. Fiber outlet; 25. Grate cylinder; 251. Grate cylinder support; 26. First spiral blade; 261. Drive shaft; 262. Scraper blade; 27. Second spiral blade. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0019] The waste paper recycling wastewater treatment device of the present invention will be described below with reference to the accompanying drawings.

[0020] like Figures 1-6 As shown, the waste paper recycling wastewater treatment device provided in this embodiment of the invention includes a fiber picking mechanism 1 and a squeezing treatment mechanism 2. The fiber picking mechanism 1 includes a primary treatment box 11, a rake roller 18 and a fiber discharge plate 13. The rake roller 18 is rotatably disposed inside the primary treatment box 11. A rake roller drive shaft 181 is disposed inside the rake roller 18. A rake roller drive motor 17 for driving the rake roller 18 to rotate is disposed on the primary treatment box 11. The fiber discharge plate 13 is disposed at the discharge end of the rake roller 18.

[0021] The extrusion processing mechanism 2 includes a secondary processing box 22, a grate cylinder 25, and a first spiral blade 26. The feed end of the secondary processing box 22 is connected to the bottom of the primary processing box 11 through a guide pipe 211. The grate cylinder 25 is located inside the secondary processing box 22, and the first spiral blade 26 is rotatably located inside the grate cylinder 25.

[0022] Specifically, when the waste paper recycling wastewater treatment device of this application is used, the wastewater is first fed into the primary treatment tank 11. The wastewater is treated in the primary treatment tank 11. As the rake roller 18 rotates, the larger fiber materials in the wastewater are picked off and collected. Then the rake roller 18 continues to rotate to transfer the larger fiber materials to the fiber discharge plate 13 for discharge.

[0023] The wastewater, after being treated in the primary treatment tank 11, is then transferred to the secondary treatment tank 22. The wastewater is filtered through the grate 25, where small fibrous materials are trapped on the inner wall. Subsequently, the first spiral blade 26 rotates, continuously scraping away the fibrous materials accumulated on the inner wall of the grate 25. The fibrous materials are pushed to the right and conducted out, and the wastewater passing through the wall of the grate 25 undergoes deep filtration. This process maximizes the collection and utilization of fibrous materials in the wastewater, thereby improving the wastewater quality.

[0024] In one embodiment of the present invention, such as Figure 4 As shown, a fiber outlet 12 is provided on one side of the primary processing box 11, and a fiber outlet plate 13 is inclinedly arranged at the bottom of the fiber outlet 12. A carding plate 131 is provided on the fiber outlet plate 13, and carding grooves are provided on the carding plate 131. A rake tooth 182 is provided on the rake roller 18. The rake tooth 182 is adapted to the carding grooves and is made of elastic material.

[0025] The primary treatment box 11 is equipped with a filter plate 19, which is located below the rake roller 18, and the upper surface of the filter plate 19 is in contact with the rake teeth 182.

[0026] Specifically, during the rotation of the rake roller 18, the rake teeth 182 scrape the fibrous material in the wastewater, picking it off and attaching it to the dense rake teeth 182. As the rake roller 18 continues to rotate, when the rake teeth 182 reach the position of the carding plate 131, the rake teeth 182 are squeezed through the carding grooves. The carding grooves intercept the fibrous material attached to the rake teeth 182. The fibrous material is intercepted on the upper surface of the carding plate 131 and slides down and is discharged along the inclined fiber discharge plate 13.

[0027] After being combed, the surface of the rake teeth 182 is cleaned again. As the rake roller 18 continues to rotate, the rake teeth 182 carry out a new round of cleaning work on the fibrous materials in the wastewater.

[0028] Furthermore, because the rake teeth 182 are made of elastic material, they do not experience hard compression contact as they pass through the combing grooves, making it easier for them to pass through and protecting them. In addition, during rotation, when the rake teeth 182 reach the upper surface of the filter plate 19, they contact the surface and promptly scrape away any fibrous material adhering to it, ensuring the filter plate 19 remains unobstructed.

[0029] In one embodiment of the present invention, such as Figure 2 and Figure 4As shown, the upper surface of the filter plate 19 is a concave arc structure. A baffle 191 is provided on one side of the filter plate 19, and a feeding hopper 16 is provided on the other side. The feeding hopper 16 extends to the outside of the primary treatment tank 11 to facilitate the feeding of wastewater into the primary treatment tank 11.

[0030] Specifically, the arc-shaped filter plate 19 is used to hold wastewater. When wastewater is fed into the feed hopper 16, it will be filtered through the filter plate 19 and discharged downwards from the bottom of the primary treatment tank 11.

[0031] In one embodiment of the present invention, such as Figures 2-4 As shown, a conveyor belt 14 is provided at the discharge end of the fiber discharge plate 13. A conveyor belt drive roller 141 is provided inside the conveyor belt 14. The conveyor belt 14 is a mesh-like perforated conveyor belt. A filtered water collection tank 15 is provided below the conveyor belt 14. A first recovery pipe 151 is provided at the discharge end of the filtered water collection tank 15. A second recovery pipe 192 is provided at the bottom of the primary treatment tank 11. A back suction pump 193 is provided at the output ends of the first recovery pipe 151 and the second recovery pipe 192. The discharge end of the back suction pump 193 is connected to the inlet end of the grate cylinder 25.

[0032] Specifically, the fibrous material on the rake teeth 182 is intercepted on the carding plate 131 after being carded. As the fiber discharge plate 13 slides down, the fibrous material mixed with water slides down onto the hollow mesh conveyor belt 14. The fibrous material mixed with water passes through the conveyor belt 14 and enters the filtered water collection tank 15, keeping the fibrous material on the conveyor belt 14 dry.

[0033] Wastewater in the filtered water collection tank 15 is transferred to the back suction pump 193 through the first recovery pipe 151. At the same time, the second recovery pipe 192 transfers the wastewater generated by the primary treatment tank 11 to the back suction pump 193. Finally, the back suction pump 193 transfers the wastewater to the secondary treatment tank 22.

[0034] In one embodiment of the present invention, such as Figure 5 and Figure 6 As shown, the surface of the grate cylinder 25 is provided with grate mesh holes, and the edge of the first spiral blade 26 is provided with a scraping blade 262, which is in contact with the inner wall of the grate cylinder 25.

[0035] Specifically, when the grate cylinder 25 filters wastewater, as fibrous materials are filtered and intercepted by the grate mesh, they adhere to the inner wall of the grate cylinder 25. At this time, the first spiral blade 26 rotates, driving the scraping blade belt 262 to rotate spirally, scraping the fibrous materials accumulated on the inner wall of the grate cylinder 25, preventing the fibrous materials from clogging the grate mesh, and keeping the grate mesh open for filtration.

[0036] In one embodiment of the present invention, such as Figure 5As shown, a drive shaft 261 is provided on the inner side of the first spiral blade 26, and a slag conveying pipe 24 is provided at the discharge end of the grate cylinder 25. The inner diameter of the slag conveying pipe 24 is smaller than the inner diameter of the grate cylinder 25. A second spiral blade 27 is provided on the inner side of the slag conveying pipe 24 and is mounted on the drive shaft 261. An extrusion drive motor 241 is provided on the outside of the slag conveying pipe 24. The output shaft of the extrusion drive motor 241 is connected to the drive shaft 261. A fiber outlet 242 is provided at the bottom of the slag conveying pipe 24.

[0037] Specifically, the extrusion drive motor 241 drives the drive shaft 261 to rotate, which in turn drives the first spiral blade 26 to rotate. The first spiral blade 26 continuously scrapes and transports the fibrous material in the grate cylinder 25 to the right, and finally enters the slag conveying pipe 24. Then, the second spiral blade 27 rotates to continue to extrude the fibrous material in the slag conveying pipe 24 to the right, and finally extrudes it to the fiber outlet 242. The fibrous material is finally extruded and discharged from the fiber outlet 242.

[0038] In one embodiment of the present invention, such as Figure 2 and Figure 5 As shown, the top of the secondary processing box 22 is provided with an air vent 23, the bottom of the secondary processing box 22 is provided with a water collection tank 221, the feed end of the grate cylinder 25 is provided with a feed storage tank 21, and the outside of the grate cylinder 25 is provided with a grate cylinder support 251.

[0039] Specifically, during the operation of the secondary treatment tank 22, the vent 23 at the top is used to promptly discharge the gas accumulated in the tank. After being filtered by the grate tube 25, the wastewater falls into the water collection tank 221 and is discharged through the drain outlet 222 at the bottom of the water collection tank 221.

[0040] Before the wastewater discharged from the bottom of the primary treatment tank 11 enters the secondary treatment tank 22, it is first sent to the feed storage tank 21 for storage to stabilize the feeding speed at the feed end of the grate cylinder 25. The grate cylinder support 251 outside the grate cylinder 25 suspends the grate cylinder 25 inside the secondary treatment tank 22, providing effective transfer space for the filtered wastewater and ensuring effective wastewater transfer.

[0041] To clearly illustrate the above embodiments, refer to Figures 1-6 The specific working principle of the waste paper recycling wastewater treatment device of the present invention is as follows: When the waste paper recycling wastewater treatment device of this application is used, the wastewater is first fed into the feeding hopper 16. The wastewater enters the primary treatment tank 11 through the feeding hopper 16. When the wastewater is fed into the inlet of the feeding hopper 16, the wastewater will be filtered through the filter plate 19 and discharged downward from the bottom of the primary treatment tank 11.

[0042] As the rake roller 18 rotates, the rake teeth 182 scrape and sweep the fibrous material in the wastewater, picking it off and attaching it to the dense rake teeth 182. As the rake roller 18 continues to rotate, when the rake teeth 182 reach the carding plate 131, they are squeezed through the carding grooves. The carding grooves intercept the fibrous material attached to the rake teeth 182, which is then trapped on the upper surface of the carding plate 131 and slides down the inclined fiber discharge plate 13 for discharge. The surface of the rake teeth 182 is then cleaned again, and as the rake roller 18 continues to rotate, the rake teeth 182 perform a new round of cleaning of the fibrous material in the wastewater.

[0043] After the fiber material on the rake teeth 182 is combed by the carding plate 131, it is intercepted on the carding plate 131. As the fiber discharge plate 13 slides down, the fiber material mixed with water slides down onto the hollow mesh conveyor belt 14 for collection. The fiber material mixed with water passes through the conveyor belt 14 and enters the filtered water collection tank 15.

[0044] Subsequently, the wastewater in the filtered water collection tank 15 is transferred to the back suction pump 193 through the first recovery pipe 151. At the same time, the second recovery pipe 192 transfers the wastewater generated by the primary treatment tank 11 to the back suction pump 193. Finally, the back suction pump 193 transfers the wastewater to the secondary treatment tank 22. When the grate cylinder 25 filters the wastewater, as the fibrous material is filtered and intercepted by the grate mesh, the fibrous material adheres to the inner wall of the grate cylinder 25.

[0045] Subsequently, the extrusion drive motor 241 drives the drive shaft 261 to rotate, which in turn drives the first spiral blade 26 to rotate. The first spiral blade 26 continuously scrapes and transports the fibrous material in the grate cylinder 25 to the right, eventually entering the slag conveying pipe 24. When the first spiral blade 26 rotates, it drives the scraping blade 262 to rotate spirally, scraping the fibrous material accumulated on the inner wall of the grate cylinder 25 to prevent the fibrous material from clogging the grate mesh and keep the grate mesh open for filtration.

[0046] Subsequently, the second spiral blade 27 rotates, further squeezing the fibrous material in the slag conveying pipe 24 to the right, and finally squeezing it to the fiber outlet 242. The fibrous material is then squeezed out from the fiber outlet 242 and collected. After being filtered by the grate cylinder 25, the wastewater falls into the water collection tank 221 and is discharged through the drain outlet 222 at the bottom of the water collection tank 221.

[0047] In summary, the waste paper recycling wastewater treatment device of this invention treats wastewater through a primary treatment tank. A rotating rake roller picks and collects larger fibers from the wastewater, which are then transferred to a fiber discharge plate. The wastewater, after primary treatment, is then transferred to a secondary treatment tank where it is filtered through a grate. Smaller fibers are trapped on the inner wall of the grate and then continuously pushed to the right and carried away by the first spiral blades. This process maximizes the collection and utilization of fibers in the wastewater, improving wastewater quality.

[0048] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A waste paper recycling wastewater treatment device, characterized in that, It includes a fiber picking mechanism (1) and an extrusion processing mechanism (2). The fiber picking mechanism (1) includes a primary processing box (11), a rake roller (18) and a fiber discharge plate (13). The rake roller (18) is rotatably disposed inside the primary processing box (11), and the fiber discharge plate (13) is disposed at the discharge end of the rake roller (18). The extrusion processing mechanism (2) includes a secondary processing box (22), a grate cylinder (25), and a first spiral blade (26). The feed end of the secondary processing box (22) is connected to the bottom of the primary processing box (11) through a guide pipe (211). The grate cylinder (25) is located inside the secondary processing box (22), and the first spiral blade (26) is rotatably located inside the grate cylinder (25).

2. The waste paper recycling wastewater treatment device according to claim 1, characterized in that, The primary processing box (11) has a fiber outlet (12) on one side, and the fiber outlet plate (13) is inclinedly arranged at the bottom of the fiber outlet (12); The fiber discharge plate (13) is provided with a carding plate (131), the carding plate (131) is provided with carding grooves, the rake roller (18) is provided with rake teeth (182), the rake teeth (182) are adapted to the carding grooves, and the rake teeth (182) are made of elastic material.

3. The waste paper recycling wastewater treatment device according to claim 2, characterized in that, The primary treatment box (11) is equipped with a filter plate (19), which is located below the rake roller (18), and the upper surface of the filter plate (19) is in contact with the rake teeth (182).

4. The waste paper recycling wastewater treatment device according to claim 3, characterized in that, The upper surface of the filter plate (19) is a concave arc structure. A baffle (191) is provided on one side of the filter plate (19), and a feeding hopper (16) is provided on the other side. The feeding hopper (16) extends to the outside of the primary treatment box (11).

5. The waste paper recycling wastewater treatment device according to claim 1, characterized in that, The surface of the grate cylinder (25) is provided with grate mesh holes, and the edge of the first spiral blade (26) is provided with a scraping blade (262), which is in contact with the inner wall of the grate cylinder (25).

6. The waste paper recycling wastewater treatment device according to claim 5, characterized in that, A drive shaft (261) is provided on the inner side of the first spiral blade (26), and a slag transfer pipe (24) is provided at the discharge end of the grate cylinder (25). The inner diameter of the slag transfer pipe (24) is smaller than the inner diameter of the grate cylinder (25). A second spiral blade (27) is provided on the inner side of the slag transfer pipe (24). The second spiral blade (27) is provided on the drive shaft (261). An extrusion drive motor (241) is provided on the outside of the slag transfer pipe (24). The output shaft of the extrusion drive motor (241) is connected to the drive shaft (261). A fiber outlet (242) is opened at the bottom of the slag transfer pipe (24).

7. The waste paper recycling wastewater treatment device according to claim 1, characterized in that, The top of the secondary processing box (22) is provided with an air vent (23), the bottom of the secondary processing box (22) is provided with a water collection tank (221), the feed end of the grate cylinder (25) is provided with a feed storage tank (21), and the outside of the grate cylinder (25) is provided with a grate cylinder support (251).

8. The waste paper recycling wastewater treatment device according to claim 1, characterized in that, The fiber discharge plate (13) is provided with a conveyor belt (14) at the discharge end. The conveyor belt (14) is a mesh hollow conveyor belt (14). A filter water collection tank (15) is provided below the conveyor belt (14). A first recovery pipe (151) is provided at the discharge end of the filter water collection tank (15).

9. The waste paper recycling wastewater treatment device according to claim 8, characterized in that, The bottom of the primary treatment tank (11) is provided with a second recovery pipe (192). The output ends of the first recovery pipe (151) and the second recovery pipe (192) are jointly provided with a back suction pump (193). The discharge end of the back suction pump (193) is connected to the feed end of the grate cylinder (25).

Images