CN109024025B

CN109024025B - Waste paper regeneration process method

Info

Publication number: CN109024025B
Application number: CN201811061852.6A
Authority: CN
Inventors: 王晨宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-09-12
Filing date: 2018-09-12
Publication date: 2020-10-16
Anticipated expiration: 2038-09-12
Also published as: CN109024025A

Abstract

The invention belongs to the technical field of resource regeneration, and provides a waste paper regeneration process method which comprises a plurality of steps of atomizing and humidifying, pre-deinking by using a solid deinking agent, ultrasonic re-deinking, cutting and centrifugal separation, mixing additives such as suspended fibers, re-atomizing and humidifying, a hot melt type fiber adhesive and the like, negative pressure, gravity, vibration, heating and hot sticking molding, rapid cooling, cutting and the like. The waste paper regeneration process method is a dry waste paper regeneration method, and different from the prior art, a large amount of water is not introduced in the early stage, the water is not required to be used as a carrier for impurity removal, and a complicated waste water treatment process is not required in the subsequent stage, so that the steps and conditions for waste paper regeneration are simplified, and the efficiency and the speed of waste paper regeneration are improved. The waste paper regeneration process can change the existing waste paper regeneration places from paper mills to enterprises, schools, communities and the like for use, has high operability and high use effect, is extremely beneficial to social popularization and use, and has important significance for environmental protection.

Description

Waste paper regeneration process method

Technical Field

The invention belongs to the technical field of resource regeneration, and particularly relates to a waste paper regeneration process method.

Background

Paper is a carrier of information and also a basic production material of modern society. The development degree of the paper industry is closely related to national economic development and social civilization construction. The main component of the paper is fiber, the main source of the paper is wood, and along with the rapid development of the society in China, a large amount of paper needs result in large wood consumption. Since the 20 th century, people are more and more concerned about the continuous development of green recycling, and paper is one of the first substances which are tried to be recycled and reused as an important production material.

People have extensively studied the recycling technology of the waste paper, the main process flow of the existing waste paper regeneration technology comprises the steps of soaking in water, pulping, deinking, bleaching, dehydrating, drying and the like, and the waste paper regeneration technology has the following defects:

first, it is usually necessary to additionally newly add water as a carrier, and add a treating compound or the like which is harmful to the environment. Therefore, the current recycled paper industry often produces a large amount of waste water. A large amount of water resources are wasted, and meanwhile, the generated wastewater is directly discharged to pollute the environment, and high water treatment cost is required for repurification treatment. In summary, the conventional used paper recycling process causes cost increase, environmental destruction, and waste of resources.

Secondly, the general flow is complicated, the waste paper regeneration rate is reduced due to the loss of each step, a large amount of time is occupied, and the steps all need large-scale equipment, so that the domestic recycled paper is from a large-scale waste paper regeneration factory at present, and due to the application of more large-scale equipment, the complicated technology cannot be popularized in small groups. Meanwhile, as the regeneration group is only limited to factories, the regeneration link also involves waste paper collection, screening and transportation, and different processes are completed in different factories, which involves a great rise in the cost of manpower and material resources. In a word, the traditional waste paper regeneration process has narrow applicable objects, complicated technology, strict requirements on equipment conditions, low waste paper regeneration rate and high consumption of manpower and material resources.

Third, the recycled paper technology, the most central purpose is to protect the environment, but the cost is rising due to the process defects of the existing recycled paper, but currently, no clear definition is made on the recycled paper in China, so that many recycling plants only use 20% of recycled paper pulp for cost saving, and the rest is replaced by artificial fiber or wood fiber, so that the cost is reduced, and the recycled paper is sold on the market under the name of recycled paper, and the environment is not really protected by the means of recycling waste paper.

For example:

chinese patent application publication No. CN106948202B, "waste paper recycling apparatus based on biological process and method of using the same", discloses a waste paper recycling technique, which includes the steps of, step S1, providing a waste paper recycling apparatus; step S2, paper feed; step S3, soaking; step S4, pulping; step S5, deinking; step S6, dewatering; and step S7, flattening and drying.

The chinese patent application publication No. CN101798768A discloses "waste paper recycling environmental protection equipment and method", and also discloses a waste paper recycling technology, which comprises a hydropulper, a first pulp tank, a first sand remover, an inclined screen, a second pulp tank, a pulp grinder, a third pulp tank, a head box, a fourth pulp tank, a second sand remover, a pressure screen, a paper machine, a boiler, a reaction tank and a sewage filtering tank.

Chinese patent application publication No. CN1247249, entitled "a waste paper regeneration technology without wastewater discharge", also discloses a waste paper regeneration technology, which includes subjecting waste paper to hydraulic pulping, pulp washing, dewatering, grinding, sand removal, collecting in a net cage, and performing paper making on a paper machine, wherein pulp before the sand removal, color water discharged from the net cage, and white water and clean water from the paper machine are sequentially arranged and communicated in a mixing tank, and the white water can also supplement water for hydraulic pulping and washing water.

Obviously, in the above three waste paper recycling patent application technologies, a large amount of water is required to be added for soaking or pulping in the first step of waste paper treatment, and due to the introduction of a large amount of water, the recycling efficiency of recycled paper is reduced, and a subsequent series of cost increases and environmental influences are caused. Meanwhile, obviously, the technical steps of the three waste paper recycling patent applications are all complex, a large amount of industrial equipment is needed, and the wide application of the technology is limited to a certain extent.

Disclosure of Invention

In order to solve the above problems in the prior art, the first object of the present invention is to provide a novel waste paper recycling process, which improves the waste paper recycling efficiency by avoiding the introduction of a large amount of water, avoids the generation of a large amount of waste water, and reduces the production cost of the recycled paper process.

Based on the technical purpose, the waste paper recycling process method provided by the invention comprises the following steps:

s1, taking waste paper, and carrying out atomization and humidification on the waste paper;

s2, adding a solid deinking agent for pre-deinking;

s3, cutting into strips, and performing centrifugal separation;

s4, taking the middle section fiber obtained in the middle section of the centrifugal separation process, and suspending the middle section fiber through airflow vortex;

s5, adding additives: atomizing water and preserving moisture;

s6, adding additives: a hot-melt fiber adhesive granulated after high pressure action;

s7, uniformly mixing the middle section fibers with the additives through airflow vortexes;

s8, stopping the airflow vortex, and enabling the mixed middle-section fibers and the additives to fall on the surface of one side of the formed net;

s9, heating the middle section fibers falling on the formed net and all additives to bond the middle section fibers and the additives;

s10, extruding and forming to obtain a paper blank, cooling and then cutting to obtain the paper blank.

Based on the technical scheme, the waste paper regeneration process method provided by the invention avoids the introduction of a large amount of water in the early stage, so that no waste water is generated in the subsequent process. The separation of impurities is directly performed by using the difference in specific gravity of each component in step S3 and applying the centrifugal effect and the gas lift effect. Compared with the traditional processes of wastewater re-dehydration and the like, the treatment steps are simple and convenient. High efficiency and can obviously improve the regeneration efficiency of the waste paper.

In order to smoothly separate the ink attached to the waste paper from the paper fibers, in accordance with an embodiment of the present invention based on the above core solution, in S1: after atomization and humidification, the humidity of the waste paper is 90% -100%. The waste paper is kept to have certain humidity, so that the subsequent deinking agent can be in sufficient contact with the waste paper to separate the ink from the paper fibers.

On the basis of the above core scheme, according to the embodiment of the present invention, in S2: the solid deinking agent is a particle solid deinking agent, and the addition mass of the solid deinking agent is 1.5-5 times of the mass of the waste paper. The granular solid deinking agent is adopted to increase the contact friction force with paper, so that the ink is smoothly scraped from the paper fiber and is separated. Through the addition amount of the solid deinking agent of more than 1.5 times, the weight of the solid deinking agent is enough to form a system, and the solid deinking agent can be separated as a whole in the centrifugal separation process of the next step, so that the solid deinking agent can be recycled in the regeneration of waste paper of the next batch, and the resource utilization rate is improved.

On the basis of the above core scheme, according to the embodiment of the present invention, steps S2 and S3 are both performed in a defibrator; in S2: under the condition of rotating, the solid deinking agent is contacted with the waste paper for pre-deinking, and under the condition of rotating and stirring, the solid deinking agent can be repeatedly contacted, collided and rubbed with the waste paper, so that the ink attached to the paper can be further removed; meanwhile, in order to further improve the deinking efficiency, a step of deinking the paper again by introducing ultrasonic waves between S2 and S3 is adopted, under the ultrasonic condition, ink particles on the paper can move in a resonance manner, the kinetic energy of the ink particles is increased, the efficiency and the effect of the ink particles falling off the paper are further improved, and the ultrasonic frequency of the ultrasonic waves is 30-65 KHz; in S3: and cutting the waste paper into strip flocculent paper fibers by adopting a blade under the centrifugal rotation condition.

After deinking, the impurities need to be separated, and different from the existing way of removing water and impurities, on the basis of the above core scheme, according to the embodiment of the invention, in S3: the blade rotates in the fiber separator to generate airflow, heavy fibers containing impurities are thrown out from the tail end of the fiber separator under the driving of the airflow and the centrifugal action, the light impurities containing ink and carbon powder are discharged from the top end of the fiber separator, and the recycled middle section fibers are positioned in the middle of the fiber separator. By means of centrifugal effect and airflow lift effect, different impurities are separated quickly and efficiently by means of specific gravity difference.

The generation mode of the airflow vortex can be various, and a specific implementation mode of the airflow vortex is also provided in the invention as long as the middle section of fiber can be suspended so as to facilitate the smooth and uniform of various subsequent additives. Based on the above core scheme, in S4: and (3) placing the middle section fiber into a container, installing nozzles on the peripheral side wall in the container, wherein the nozzles are externally connected with an air pump, and the airflow sprayed by the nozzles circularly flows along the inner wall of the container to generate airflow vortex. As another alternative to the implementation of the airflow vortex, rotating fan blades may be installed in the container, and the airflow vortex is generated in the container by the rotation of the rotating fan blades. The rotating fan blades can be arranged at any suitable position of the container, such as at the middle part to generate the upward air flow, or at the top part to generate the lifting air flow by sucking upward, or at the bottom part to directly blow upward to generate the lifting air flow, and any way of realizing the above is within the protection scope of the invention.

Based on the above core solution, according to the embodiment of the present invention, in S6: the addition weight of the hot-melt fiber adhesive is 0.2-0.5 time of the weight of the middle fiber. Optionally, additives are further added between S6 and S7 as required by specific practical conditions: a white slurry and/or a perfume, wherein the white slurry is added to the whiteness of the paper to reach 83-90%. Of course, when making paper with specific color, the regeneration and manufacture of paper with specific color can be realized by adding other color pulp, similarly, when some specific functions need to be attached to the paper, other functional additives can be synchronously added in the step to realize the manufacture of functional paper, for example, the paper needs to be flavored, perfume can be added, for example, waterproof paper needs to be output, waterproof paper additives can be added, and the like.

In order to facilitate further shaping of the fibers on the forming web, on the basis of the above core solution, according to the embodiments of the present invention, in S8 and S10: negative pressure is applied on the other side of the web by the air draft. The negative pressure is applied to generate suction force on the fibers from the opposite direction, so that the fibers are equivalently applied with pressure, and the fibers are conveniently and smoothly molded. In the same preferred scheme, in the paper blank forming process, the forming net in the step S8 is further connected with a vibrating device, and the forming net is driven by the vibrating device to vibrate synchronously, so that fibers on the surface of the forming net vibrate, gaps among the fibers can be filled in the process, and the flatness, stability and quality of the formed paper blank are guaranteed.

In order to make the forming effect of the formed paper blank better, on the basis of the above core solution, according to the embodiment of the present invention, in S10: and after the paper blank is sent to a cooling chamber, cooling the paper blank by an air cooler. Through the rapid cooling of the air cooler, the adhesive in the paper blank is rapidly solidified under a higher temperature difference, so that the adhesive colloid is cured, and the adhesive is prevented from hardening to form colloid.

Based on all the technical schemes, the invention has the beneficial effects that:

firstly, the invention provides a brand-new waste paper regeneration process method, which is a dry regeneration paper making process. The method avoids the introduction of a large amount of water in the early stage, avoids the generation of a large amount of wastewater, does not have wastewater in the later stage and needs to be treated, and further reduces the production cost.

And secondly, the waste paper recycling process method provided by the invention has simple treatment steps, does not need additional dehydration treatment, avoids the loss of a large amount of paper pulp, and can improve the waste paper recycling efficiency to a certain extent. The waste paper can be recycled in a short time without waiting for a long time.

Thirdly, the waste paper recycling process method provided by the invention has simple steps, the adopted equipment is easy to realize, the whole treatment process does not need complex industrialized conditions, complex industrialized transportation, transfer and other operations are not needed, the waste generation is less, the recycling rate is high, and the method is suitable for large-scale popularization and application, and is even suitable for paper recycling of household type and paper consumption type enterprises (non-specialized waste paper recycling paper mills, but general paper enterprises). Furthermore, the method can change the regeneration place of the waste paper from a paper mill to an enterprise, a school, a community and other places, thereby being further convenient for popularization. The waste paper types which can be treated by the method of the invention include, but are not limited to, common high-grade paper, yellow board paper, waste paper boxes, edge cutting paper, packing paper, office paper of enterprises and units, engineering paper, books and periodicals and newspapers and the like. And because large-scale equipment is not required in the regeneration process, the regeneration process can occupy small space in the specific implementation.

Fourthly, the impurities are efficiently separated by means of the specific gravity difference between the impurities and the high-quality fibers to be recovered and depending on the air flow lifting principle and the centrifugal principle. Compare in traditional waste water dehydration impurity separation mode of drying again, provide a brand-new impurity separation mode, not only make the separation effectual, separation efficiency is high to make the deinking agent that produces still recoverable cycle recycle, other wastes material produce fewly, follow-up waste disposal mode is simple and convenient.

Fifthly, in the forming process of the paper blank, gaps among fibers are eliminated by introducing various modes such as airflow vortex suspension, negative pressure, vibration and heating, so that the paper blank has better flatness and good forming effect. The colloid of the adhesive is rapidly solidified through rapid cooling, and is cured under higher temperature difference, so that the hardening of the colloid can not occur.

Sixth, when the technique of the invention is used for recycling, the waste paper can be recycled by only one operation of feeding the waste paper into the recycling equipment. The operation is convenient, and the waste paper can be regenerated while being produced. And because do not need to reuse a large amount of energy and resources, so can reduce the regeneration cost of waste paper greatly, the technology is no longer loaded down with trivial details, can not cause any influence to the environment.

Drawings

FIG. 1 is a process flow diagram of the present invention.

Detailed Description

The invention is further explained below with reference to the drawings and the specific embodiments.

Examples

Referring to the process flow shown in fig. 1, the embodiment provides a waste paper recycling process method, specifically a dry waste paper recycling process method, which specifically comprises the following steps:

1. the waste paper (the waste paper can contain various high-grade paper, yellow board paper, waste paper box, edge cutting paper, packing paper, office paper of enterprise and unit, engineering paper, books and periodicals, and the like) is atomized and humidified in the regeneration space, and the humidity of the waste paper is maintained between 90 and 100 percent.

2. The method is characterized in that the particle-shaped solid ink deinking agent particles are added into a fiber separator, so that the mass of the particle-shaped solid ink deinking agent particles is ensured to be overweight particles, the adding weight of the solid ink deinking agent is more than 1.5 times of the weight of the fibers of the paper to be regenerated, and in specific practice, the solid ink deinking agent particles can be selected to be 1.5 times, 2 times, 3 times, 4 times or 5 times according to actual conditions, so that the solid ink deinking agent can be discharged again in subsequent fiber separation and reused.

3. The fiber separator is used for driving the waste paper and the ink deinking agent particles under high-speed rotation, so that the ink deinking agent particles are fully contacted with the paper, and the pre-deinking effect is achieved.

4. An ultrasonic generator is used for generating ultrasonic energy of 30-65KHz, and high-frequency vibration in space is utilized to drive ink particles to resonate synchronously, so that the combination of the ink particles and paper fibers is weakened, the ink particles are disintegrated, the separation process of the deinking agent and paper ink is accelerated, and deinking is carried out.

5. Under the centrifugal force generated by high-speed rotation in the fiber separator, the blade is used for separating the paper into long fluffy flocculent paper fibers, carbon powder and printing ink in waste paper are thoroughly separated from the paper fibers, and under the condition of rotation of the blade, strong air flow is driven to move, and the difference of the overweight characteristics of different fiber weights and printing ink is utilized. Since the impurity-containing fibers are too heavy fibers containing other impurities which are not conducive to regeneration, they are thrown off the last end of the defibrator by centrifugal force in which the blades are rotated at high speed. While the high quality fiber will stay in the middle of the fiber separator. The ink, toner and other light impurities are discharged from the top of the separator because of their small mass. Separating impurities and overweight and lightest fibers in the paper fiber, and leaving middle-section fibers of recyclable excellent paper fibers for standby.

6. The middle section fiber is placed in a sealed container, the nozzles are externally connected with an air pump through the nozzles arranged on the peripheral side wall in the container, and airflow sprayed by the nozzles circularly flows along the inner wall of the container to generate airflow vortex so as to suspend the paper fiber. And adding a small amount of atomized water to keep the humidity of the regeneration space in the container, uniformly mixing and stirring the middle section fibers and the water mist, and ensuring that the humidity does not generate static electricity and other physical characteristics which are not beneficial to regeneration.

7. Then, the hot melt type fiber adhesive granulated under high pressure is added into the container, the particle diameter of the hot melt type fiber adhesive can be determined according to the characteristics of the paper to be recycled, and is preferably larger than the diameter of the paper fiber being recycled, the weight of the hot melt type fiber adhesive added is 0.2-0.5 times of the weight of the middle fiber of the paper to be recycled, in specific practice, 0.2, 0.3, 0.4 or 0.5 times can be selected according to actual conditions, and other reasonable times can also be selected.

8. And adding atomized white slurry, wherein the adding amount of the white slurry can be selected according to actual conditions, generally speaking, the white slurry is added to the paper with the whiteness reaching 83-90 percent to meet the conventional requirements, and if necessary, different spices and other additives can be added to change the smell of the paper. Similarly, other colored dyeing slurry can be added to replace the white slurry according to actual requirements.

9. After strong airflow driven by high-speed rotation is stirred in a sealed container, the middle-section fibers and other additives are suspended in the air and uniformly and slowly fall on a forming net through a negative pressure device on the side wall of the equipment and the self gravity. Likewise, the underpressure means generating underpressure can be designed in all directions of the container device, as long as the underpressure it generates creates a suction effect on the paper fibres by forming the web.

10. The fibers and other additive components are in a floating state again through the high-frequency vibration device, so that gaps among the fibers are fully filled, and then the air draft device is used for carrying out negative pressure on the formed net, so that the fibers and other additives are further uniformly adsorbed on the formed net. The air draft device can be a generating device different from the negative pressure device, and can also be the same negative pressure generating device, and the air draft device can be selected according to actual conditions as required and is within the protection scope of the invention.

11. Heating the waste paper middle section fiber and the adhesive to melt the adhesive, and adsorbing the melted adhesive by a negative pressure device under a net to enable the melted adhesive to permeate into a paper fiber core layer for full combination.

12. The flocculent fiber of the paper is changed into the sheet paper by using the double-sided compression roller to produce a paper blank, the paper blank in the current state is sent into the cooling chamber, the air cooler is used for rapidly cooling the paper, the colloid of the adhesive is rapidly solidified, the colloid is cured under higher temperature difference, and the hardening condition of the colloid can not occur.

13. And finally, cutting edges of the paper with different sizes by using a knife switch to obtain the required paper with different sizes, namely finishing the regeneration process of the waste paper.

In the above waste paper recycling step route, embossing can be performed on the paper blank to meet the recycling of paper with different requirements, such as paperboard, textured paper and the like.

Compared with the conventional waste paper regeneration process method, the waste paper regeneration process method provided by the embodiment of the invention is mainly used for carrying out core innovation and improvement on waste paper deinking and fiber separation, waste paper fiber formation, waste paper compaction, airflow stirring and the like. Finally, a dry-method waste paper regeneration process method is obtained, and makes a major breakthrough in the industry, and completely subverts the existing waste paper regeneration method which takes water as a main impurity removal mode.

The core innovation improvements are as follows:

one, anhydrous deinking and regeneration process

In the regeneration process, only a small amount of atomized water is added to play a corresponding moisturizing role, and a large amount of water is not required to be introduced, so that no wastewater is generated in the subsequent process, and the wastewater is not required to be reprocessed. Based on the method, the regeneration steps are simplified, the regeneration conditions are simplified, and the regeneration efficiency and speed are improved.

II, waste paper deinking and fiber separation:

the solid ink deinking agent particles are added into a fiber separator, the mass of the solid ink deinking agent particles is ensured to be overweight particles which are 2 times more than the fiber weight of paper to be regenerated, so that the solid ink deinking agent particles can pass through the overweight particles again in the next step of fiber separation, are discharged by the fiber separator and are reused, and meanwhile, the contact area with the paper can be enlarged. And next, driving the paper and the ink deinking agent particles by using a fiber separator under high-speed rotation to ensure that the ink deinking agent particles are fully contacted with the paper and collide and rub to achieve the pre-deinking effect. Ultrasonic energy of 30-65KHz is generated by an ultrasonic generator, and high-frequency vibration in space is utilized to weaken the combination of ink particles and paper fibers, break the ink particles and accelerate the separation process of the deinking agent and the paper ink. Under the centrifugal force generated by high-speed rotation, the blade is used for separating paper into long fluffy flocculent paper fibers, carbon powder and ink in waste paper are thoroughly separated from the paper fibers, and under the condition of rotation of the blade, strong airflow movement is driven, the fiber containing impurities is overweight fiber, and other impurities which are not beneficial to regeneration are contained in the overweight fiber by using the difference of overweight characteristics of different fiber weights and inks, so the fluffy flocculent paper fibers can be thrown out from the tail end of the fiber separator due to the centrifugal force generated by the high-speed rotation of the blade. While the high-quality fiber stays at the middle part of the fiber separator, but the ink, carbon powder and other light impurities in the high-quality fiber are discharged from the top end of the separator because the mass of the high-quality fiber is too small. The impurities therein, as well as the excessively heavy and light fibers, are separated, leaving the fine paper fibers in the paper that can be reused.

Thirdly, forming waste paper fibers:

the fibers and other additive components are in a floating state again through the high-frequency vibration device, and the formed net is subjected to negative pressure through the air exhaust device, so that the fibers and other additives are uniformly adsorbed on the formed net. And simultaneously heating the waste paper fibers and the adhesive to melt the adhesive, and adsorbing the melted adhesive by a negative pressure device under a formation layer to permeate the adhesive into a paper fiber core layer for full combination. Use two-sided compressing roller to carry out twice compaction to the paper, make the flocculent fibre of paper become the thin slice paper, send into the cooling chamber with the paper under the present condition, use the air-cooler to cool down the paper, make the colloid solidify, make the colloid curing under higher difference in temperature, the sclerosis of colloid can not appear.

Fourthly, compacting the waste paper:

two double-sided compaction rollers can be optionally used to double-compact the paper to ensure that it obtains greater strength.

Fifthly, stirring by airflow:

after the strong airflow driven by high-speed rotation is stirred in a sealed container, fibers and other additives can be suspended in the air and uniformly and slowly fall on a forming net through a negative pressure device on the side wall of the equipment and the self gravity.

The present invention is not limited to the above-described alternative embodiments, and various other forms of products can be obtained by anyone in light of the present invention. The above detailed description should not be taken as limiting the scope of the invention, which is defined in the claims, and which the description is intended to be interpreted accordingly.

Claims

1. A waste paper recycling process method is characterized by comprising the following steps:

s2, adding a solid deinking agent for pre-deinking;

s3, cutting into strips, and performing centrifugal separation;

s5, adding additives: atomizing water and preserving moisture;

s10, performing extrusion forming to obtain a paper blank, cooling, and then cutting to obtain the paper blank;

both S2 and S3 were performed in a defibrator; in S2: contacting the solid deinking agent with waste paper under a rotating condition to perform pre-deinking; a step of re-deinking under the ultrasonic condition is also arranged between S2 and S3, and the ultrasonic frequency of the ultrasonic wave is 30-65 KHz; in S3: and cutting the waste paper into strip flocculent paper fibers by adopting a blade under the centrifugal rotation condition.

2. The used paper recycling process method according to claim 1, wherein in S1: after atomization and humidification, the humidity of the waste paper is 90% -100%.

3. The used paper recycling process method according to claim 1, wherein in S2: the solid deinking agent is a particle solid deinking agent, and the addition mass of the solid deinking agent is 1.5-5 times of the mass of the waste paper.

4. The used paper recycling process method according to claim 1, wherein in S3: the blade rotates in the fiber separator to generate airflow, heavy fibers containing impurities are thrown out from the tail end of the fiber separator under the driving of the airflow and the centrifugal action, the light impurities containing ink and carbon powder are discharged from the top end of the fiber separator, and the recycled middle section fibers are positioned in the middle of the fiber separator.

5. The used paper recycling process method according to claim 1, wherein in S4: and (3) placing the middle section fiber into a container, installing nozzles on the peripheral side wall in the container, wherein the nozzles are externally connected with an air pump, and the airflow sprayed by the nozzles circularly flows along the inner wall of the container to generate airflow vortex.

6. The used paper recycling process method according to claim 1, wherein in S6: the adding weight of the hot-melt fiber adhesive is 0.2-0.5 time of the weight of the middle fiber; the method also comprises the following steps of adding additives between S6 and S7: a white slurry and/or a perfume, wherein the white slurry is added to the whiteness of the paper to reach 83-90%.

7. The used paper recycling process of claim 1, wherein in S8 and S10: negative pressure is applied on the other side of the web by the air draft.

8. The used paper recycling process of claim 7, wherein in S8: the forming net is also connected with a vibration device.

9. The used paper recycling process method according to claim 1, wherein in S10: and after the paper blank is sent to a cooling chamber, cooling the paper blank by an air cooler.