Clean production process for producing corrugating medium paper by using waste paper box

Abstract

The invention provides a clean production process for producing corrugated medium paper by using a waste paper box. The clean production process is characterized by comprising the following steps: step 1, pretreating the waste paper box through special equipment; 2, pulping and repulping: putting the treated waste paper box into special equipment, and controlling the pulping concentration; step 3, screening, purifying and mixing: screening and purifying the slurry through conventional filtering equipment, removing large particles and suspended matters, adding a petrochemical additive, and enhancing the fiber interweaving force through in-pipe mixing and a fibrillation process; the waste paper box is subjected to early-stage pretreatment by arranging special equipment, oiled paper, wax paper and the like influencing subsequent preparation are removed firstly, it is guaranteed that raw materials are clean, and the production quality of corrugated paper is guaranteed; and by designing the fourth step, waste materials and waste mud generated in the corrugated paper production process are fully utilized, resources are efficiently utilized, and waste is prevented.

Description

Technical Field

[0001] This invention relates to the field of waste cardboard recycling technology, and in particular to a clean production process for producing corrugated core paper using waste cardboard boxes. Background Technology

[0002] With the development of the packaging industry, customers have increasingly higher requirements for packaging paper. In order to protect their products and differentiate themselves from other customers in the sales process, corrugated paper is the first choice for many users as a packaging box.

[0003] Corrugated paper is a paper material with a wavy sandwich structure. Its core characteristics are lightweight, high strength, and low cost. It is one of the most widely used substrates in the global packaging industry. It is mainly used to make cartons, express boxes, cushioning pads, etc. Its essence is a multi-layer paperboard made of "face paper / bottom paper" and "corrugated core paper" bonded together with adhesive.

[0004] Currently, waste paper, including various waste newspapers and packaging paper, is an important raw material source for corrugated paper. Using waste paper as a raw material can reduce dependence on virgin resources, lower costs, and improve the environmental performance of products.

[0005] However, at present, when using waste cardboard boxes for recycling, the sorting of waste cardboard boxes in the early stage mostly relies on manual processing. In particular, waste cardboard boxes are prone to contain oily paper, waxed paper, etc., which affects fiber quality and makes wastewater treatment more difficult. Relying on manual sorting one by one greatly reduces work efficiency. Summary of the Invention

[0006] In view of the above technical problems, the present invention provides a clean production process for producing corrugated core paper using waste cardboard boxes to improve the cleaning quality of waste cardboard boxes.

[0007] This invention provides a clean production process for producing corrugated core paper using waste cardboard boxes, characterized by the following specific steps: Step 1: Waste cardboard boxes are pre-treated using specialized equipment; Step 2: Pulping and pulping. The treated waste cardboard boxes are fed into specialized equipment, and the pulping concentration is controlled at 6%-9%. Step 3: Screening, purification and mixing. The slurry is screened and purified using conventional filtration equipment to remove large particles and suspended solids. Petrochemical additives are added, and the fiber interweaving force is enhanced through in-pipe mixing and fiber separation processes. Step 4: Sludge treatment. The sludge generated during the production process is dewatered by high-concentration filter press and low-concentration filter press, and then dried and disinfected before being used to make environmentally friendly and biodegradable clay-plastic composite pallets. Step 5: Papermaking and forming. The treated pulp is made into paper using a papermaking machine, and then processed into corrugated core paper through pressing and drying processes.

[0008] The specialized equipment in steps one and two specifically includes a pretreatment unit, a conveying unit, and a pulping unit. The pretreatment unit is connected to the conveying unit, and the pulping unit is located beside the conveying unit. The pretreatment unit includes a feeding box, a discharging box, and a distributing box. The bottom of the feeding box is fixedly connected to the discharging box, and the distributing box is fixedly connected beside the discharging box. Crushing rollers are rotatably connected to the left and right sides inside the feeding box. One end of each crushing roller protrudes through the side wall of the feeding box and is connected to a gear. Two gears are meshed and connected. One of the gears is connected to the output end of a rotary motor B. One side of the discharging box is connected to a blower through a duct. Fixed plates are fixedly connected to the four corners of the bottom of the discharging box, and the fixed plates are rotatably connected to an opening and closing unit.

[0009] The opening and closing unit includes a rotating rod, a rotating plate, and a rotary motor C. The output end of the rotary motor C is connected to the rotating rod through a coupling. The rotating rod is fixedly connected to the rotating plate. There are two rotary motors C, each of which is mounted on a fixed plate on the front side of the feeding box. There are two rotating rods, each of which is rotatably connected between two fixed plates.

[0010] The air outlet of the air duct is directly opposite the feed inlet of the material distribution box.

[0011] An observation window A is provided on one side of the feeding box.

[0012] An observation window B is provided on one side of the material distribution box, and a pull-out plate is movably connected to the lower part of the material distribution box.

[0013] The conveying unit includes a support, a rotary motor A, a conveyor belt, and a bracket. The bracket is fixedly connected to the left and right side walls of the support. The rotary motor A is installed on the upper side of the support. The output end of the rotary motor A is connected to the drive roller. The drive roller is in contact with the conveyor belt. Multiple driven rollers are arranged next to the drive roller. The driven rollers are in contact with the conveyor belt. A discharge plate is arranged on the side wall of the support near the pulping unit.

[0014] The pulping unit includes a pulp tank support, a pulping tank, a rotary motor C, a stirring shaft, and stirring paddles. The pulping tank is fixedly connected inside the pulp tank support. The rotary motor C is installed on the top of the pulping tank. The output end of the rotary motor C is connected to the stirring shaft through a coupling. Stirring paddles are arranged around the stirring shaft. A feed inlet is provided through one side of the top of the pulping tank. A discharge pipe is provided at the bottom of the pulping tank, and a valve is installed on the discharge pipe.

[0015] The beneficial effects of this invention are as follows: This invention provides a clean production process for producing corrugated core paper using waste cardboard boxes. By setting up special equipment to pre-treat the waste cardboard boxes, oil paper, wax paper, etc. that may affect subsequent production are removed in advance, ensuring that the raw materials are clean and guaranteeing the production quality of corrugated paper. By designing step four, the waste materials and sludge generated during the corrugated paper production process are fully utilized, making efficient use of resources and preventing waste. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the special equipment structure of the present invention; Figure 2 This is a structural diagram of the dedicated equipment of the present invention; Figure 3 This is a top view of the preprocessing unit of the present invention; Figure 4 This is a top view of the preprocessing unit of the present invention. Figure 5 This is a schematic diagram of the front view structure of the preprocessing unit of the present invention; Figure 6 This is a rear-view structural schematic diagram of the preprocessing unit of the present invention; Figure 7 This is a schematic diagram of the rear view structure of the preprocessing unit of the present invention; Figure 8 This is a partial schematic diagram of the preprocessing unit of the present invention; Figure 9 This is a schematic diagram of the pulping unit structure of the present invention; Figure 10 This is a partial structural schematic diagram of the pulping unit of the present invention.

[0017] Reference numerals: 1-Pretreatment unit; 11-Feeding box; 12-Crushing roller; 13-Discharge box; 131-Observation window A; 132-Fixing plate; 133-Rotating motor C; 134-Rotating plate; 14-Air duct; 15-Fan; 16-Distribution box; 161-Observation window B; 162-Pull-out plate; 17-Gear; 18-Rotating motor B; 2-Conveying unit; 21-Support; 22-Rotating motor A; 23-Conveyor belt; 24-Bracket; 25-Discharge plate; 3-Pulping unit; 31-Pulping tank bracket; 32-Pulping tank; 33-Rotating motor C; 321-Inlet; 322-Valve; 34-Agitator shaft; 35-Agitator paddle. Detailed Implementation

[0018] Example 1

[0019] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings.

[0020] like Figure 1As shown, the present invention provides a clean production process for producing corrugated core paper using waste cardboard boxes, characterized by the following specific steps: Step 1: Waste cardboard boxes are pre-treated using specialized equipment; Step 2: Pulping and pulping. The treated waste cardboard boxes are fed into specialized equipment, and the pulping concentration is controlled at 6%-9%. Step 3: Screening, purification and mixing. The slurry is screened and purified using conventional filtration equipment to remove large particles and suspended solids. Petrochemical additives are added, and the fiber interweaving force is enhanced through in-pipe mixing and fiber separation processes. Step 4: Sludge treatment. The sludge generated during the production process is dewatered by high-concentration filter press and low-concentration filter press, and then dried and disinfected before being used to make environmentally friendly and biodegradable clay-plastic composite pallets. Step 5: Papermaking and forming. The treated pulp is made into paper using a papermaking machine, and then processed into corrugated core paper through pressing and drying processes.

[0021] The special equipment for steps one and two specifically includes a pretreatment unit 1, a conveying unit 2, and a pulping unit 3. The pretreatment unit 1 is connected to the conveying unit 2, and the pulping unit 3 is set next to the conveying unit 2. The pretreatment unit 1 includes a feeding box 11, a discharging box 13, and a distributing box 16. The bottom of the feeding box 11 is fixedly connected to the discharging box 13, and the distributing box 16 is fixedly connected to the side of the discharging box 13. The left and right sides inside the feeding box 11 are respectively rotatably connected to crushing rollers 12. One end of each crushing roller 12 protrudes through the side wall of the feeding box 11 and is connected to a gear 17. The two gears 17 are meshed and connected. One of the gears 17 is connected to the output end of the rotary motor B18. One side of the discharging box 13 is connected to the blower 15 through the air duct 14. The four corners of the bottom of the discharging box 13 are fixedly connected to the fixing plate 132, and the fixing plate 132 is rotatably connected to the opening and closing unit.

[0022] The opening and closing unit includes a rotating rod, a rotating plate 134, and a rotary motor C133. The output end of the rotary motor C133 is connected to the rotating rod through a coupling. The rotating rod is fixedly connected to the rotating plate 134. There are two rotary motors C133, and each rotary motor C133 is mounted on a fixed plate 132 on the front side of the feeding box 13. There are two rotating rods, and each rotating rod is rotatably connected between two fixed plates 132.

[0023] The air outlet of duct 14 is directly opposite the feed inlet of material distribution box 16.

[0024] An observation window A131 is provided on one side of the feeding box 13.

[0025] An observation window B161 is provided on one side of the material distribution box 16, and a pull-out plate 162 is movably connected to the lower part of the material distribution box 16.

[0026] The conveying unit includes a support 21, a rotary motor A22, a conveyor belt 23, and a bracket 24. The bracket 24 is fixedly connected to the left and right side walls of the support 21. The rotary motor A22 is installed on the upper side of the support 21. The output end of the rotary motor A22 is connected to the drive roller. The drive roller is in contact with the conveyor belt 23. Multiple driven rollers are arranged next to the drive roller. The driven rollers are in contact with the conveyor belt 23. A discharge plate 25 is arranged on the side wall of the support 21 near the pulping unit.

[0027] The pulping unit includes a pulp tank support 31, a pulping tank 32, a rotary motor C33, a stirring shaft 34, and a stirring paddle 35. The pulping tank 32 is fixedly connected inside the pulp tank support 31. The rotary motor C33 is installed on the top of the pulping tank 32. The output end of the rotary motor C33 is connected to the stirring shaft 34 through a coupling. The stirring paddle 35 is arranged around the stirring shaft 34. The inlet 321 is provided through one side of the top of the pulping tank 32. The outlet pipe is provided at the bottom of the pulping tank 32, and a valve 322 is installed on the outlet pipe.

[0028] Example 2

[0029] In use, the waste cardboard box is placed into the feeding box 11. The rotary motor B18 is started, which drives the gear 17 connected to it to rotate. The gear 17 drives the gear 17 meshing with it on the side to rotate, thereby causing the two crushing rollers 12 to rotate and crush the waste cardboard box. At the same time, the blower 15 is started. The appropriate model of blower 15 is selected according to the wind speed control. The blower 15 delivers air through the air duct 14. After the waste paper scraps formed from the crushed waste cardboard box fall, the scraps of oil paper and wax paper residues are lighter and will be blown into the distribution box 16 by the air duct 14, while the scraps of the waste cardboard box itself, which are heavier, will naturally fall to the bottom of the discharge box 13. A certain amount of waste paper is formed and observed through the observation window A131. When the accumulation reaches a certain level, the rotary motor C33 is started. The rotary motor C33 drives the rotating rod and the rotating plate 134 to rotate. At this time, the accumulated waste paper scraps fall onto the conveyor belt 23 under the guidance of the rotating plate 134. The rotary motor C33 can be a stepper motor, which can rotate a certain angle to adjust the opening and closing angle between the two rotating plates 134, so that the waste scraps will not spread outwards and affect the environment when they fall. The rotary motor A22 is started to drive the drive roller to rotate, which in turn drives the conveyor belt 23 to transmit the waste scraps to the discharge port and fall into the pulping tank 32. The above steps are the waste paper pretreatment steps of step one.

[0030] Next, the rotary motor C33 is started, which drives the stirring shaft 34 to rotate, and then drives the stirring paddle 35 to rotate, realizing the pulping of paper scraps. When the pulp has been formed for a period of time, the pulp is discharged from the discharge pipe by opening the valve 322. The opening of the valve 322 can be controlled to discharge a small amount of pulp as a sample, which is tested by a pulp concentration detector to control the pulp concentration at 6%-9%. After passing the test, it is discharged to the filtration device, and the pulp concentration is adjusted to 0.8%-1.0% by the filtration device. This filtration device is a commonly used equipment at present. Since this invention will not explain it in detail, the filtered pulp is processed through steps four and five in sequence, and finally qualified corrugated cardboard is produced.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. The various components mentioned in this invention are common technologies in the existing field. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A clean production process for producing corrugated core paper using waste cardboard boxes, characterized in that... The specific steps include the following: Step 1: Waste cardboard boxes are pre-treated using specialized equipment; Step 2: Pulping and pulping. The treated waste cardboard boxes are fed into specialized equipment to control the pulping concentration. Step 3: Screening, purification and mixing. The slurry is screened and purified using conventional filtration equipment to remove large particles and suspended solids. Petrochemical additives are added, and the fiber interweaving force is enhanced through in-pipe mixing and fiber separation processes. Step 4: Sludge treatment. The sludge generated during the production process is dewatered by high-concentration filter press and low-concentration filter press, and then dried and disinfected before being used to make environmentally friendly and biodegradable clay-plastic composite pallets. Step 5: Papermaking and forming. The treated pulp is made into paper using a papermaking machine, and then processed into corrugated core paper through pressing and drying processes.

2. The clean production process for producing corrugated core paper using waste cardboard boxes according to claim 1, characterized in that... The specialized equipment in steps one and two specifically includes a pretreatment unit, a conveying unit, and a pulping unit. The pretreatment unit is connected to the conveying unit, and the pulping unit is located beside the conveying unit. The pretreatment unit includes a feeding box, a discharging box, and a distributing box. The bottom of the feeding box is fixedly connected to the discharging box, and the distributing box is fixedly connected beside the discharging box. Crushing rollers are rotatably connected to the left and right sides inside the feeding box. One end of each crushing roller protrudes through the side wall of the feeding box and is connected to a gear. Two gears are meshed and connected. One of the gears is connected to the output end of a rotary motor B. One side of the discharging box is connected to a blower through a duct. Fixed plates are fixedly connected to the four corners of the bottom of the discharging box, and the fixed plates are rotatably connected to an opening and closing unit.

3. A clean production process for producing corrugated core paper using waste cardboard boxes according to claim 2, characterized in that... The opening and closing unit includes a rotating rod, a rotating plate, and a rotary motor C. The output end of the rotary motor C is connected to the rotating rod through a coupling. The rotating rod is fixedly connected to the rotating plate. There are two rotary motors C, each of which is mounted on a fixed plate on the front side of the feeding box. There are two rotating rods, each of which is rotatably connected between two fixed plates.

4. A clean production process for producing corrugated core paper using waste cardboard boxes according to claim 2, characterized in that... The air outlet of the air duct is directly opposite the feed inlet of the material distribution box.

5. A clean production process for producing corrugated core paper using waste cardboard boxes according to claim 2, characterized in that... An observation window A is provided on one side of the feeding box.

6. A clean production process for producing corrugated core paper using waste cardboard boxes according to claim 2, characterized in that... An observation window B is provided on one side of the material distribution box, and a pull-out plate is movably connected to the lower part of the material distribution box.

7. A clean production process for producing corrugated core paper using waste cardboard boxes according to claim 2, characterized in that... The conveying unit includes a support, a rotary motor A, a conveyor belt, and a bracket. The bracket is fixedly connected to the left and right side walls of the support. The rotary motor A is installed on the upper side of the support. The output end of the rotary motor A is connected to the drive roller. The drive roller is in contact with the conveyor belt. Multiple driven rollers are arranged next to the drive roller. The driven rollers are in contact with the conveyor belt. A discharge plate is arranged on the side wall of the support near the pulping unit.

8. A clean production process for producing corrugated core paper using waste cardboard boxes according to claim 2, characterized in that... The pulping unit includes a pulp tank support, a pulping tank, a rotary motor C, a stirring shaft, and stirring paddles. The pulping tank is fixedly connected inside the pulp tank support. The rotary motor C is installed on the top of the pulping tank. The output end of the rotary motor C is connected to the stirring shaft through a coupling. Stirring paddles are arranged around the stirring shaft. A feed inlet is provided through one side of the top of the pulping tank. A discharge pipe is provided at the bottom of the pulping tank, and a valve is installed on the discharge pipe.

Images