阅读说明：本技术 一种办公废纸回收再生方法 (Office waste paper recycling method ) 是由 不公告发明人 于 2020-07-06 设计创作，主要内容包括：本发明公开了一种办公废纸回收再生方法,经过碎解、制浆、脱墨、漂白、压制、干燥、裁剪,回收制得合格的办公用纸。与现有技术相比,本发明采用生物酶的预处理技术,突破传统造纸对化学试品的依赖；通过能耗低、效果明显的生物酶和超声波协同脱墨技术,减少了化学试剂的应用；采用易处理的过氧化氢—臭氧混合的漂白技术,无污染,绿色环保,降低了废水处理的难度；提高办公复印废纸的利用率和废纸回收利用率,以及降低办公用纸成本,节约用水和能源,保护环境,同时能够将各个步骤处理装置一体化、自动化,便于推广使用。(The invention discloses a method for recycling office waste paper, which is used for recycling qualified office paper through crushing, pulping, deinking, bleaching, pressing, drying and cutting. Compared with the prior art, the method adopts the pretreatment technology of the biological enzyme, and breaks through the dependence of the traditional papermaking on chemical samples; the application of chemical reagents is reduced by the biological enzyme and ultrasonic wave synergistic deinking technology with low energy consumption and obvious effect; the bleaching technology of mixing hydrogen peroxide and ozone which is easy to treat is adopted, so that the method is pollution-free, environment-friendly and capable of reducing the difficulty of wastewater treatment; improve the utilization ratio and the waste paper recycle ratio of official working duplicating waste paper to and reduce the official working paper cost, the using water wisely and the energy, the environmental protection can be with each step processing apparatus integration, automation, convenient to popularize and use simultaneously.)

1. An office waste paper recycling method is characterized by comprising the following steps:

1) putting a certain amount of office waste paper into an extractor, heating in a constant-temperature water bath tank at 60 ℃, adding a solvent for extraction, adjusting the concentration of the pulp to 8% after the residual solvent in the extracted sample is evaporated, adding the pulp into a stirrer for waste paper disintegration, wherein the disintegration time is 45 min;

2) adding SKHZYE-DPE91 bio-enzyme into the crushed paper pulp for pretreatment before ultrasonic deinking;

3) placing the pretreated paper pulp in an ultrasonic cleaning tank for ultrasonic treatment for 10min, controlling the ultrasonic treatment temperature to be 40 ℃, controlling the ultrasonic treatment power to be 300W, controlling the ultrasonic treatment frequency to be 40kHz, and enabling the concentration of the paper pulp to reach 0.5 percent after treatment;

4) adjusting the concentration of the deinked paper pulp to 10-12%, adjusting the pH to 6 and adjusting the temperature to about 55 ℃;

5) adding prepared SKHZYE-DPE91 bio-enzyme again, wherein the reaction time is 20min;

6) after the biological enzyme treatment, the paper pulp is acidic, the pH value is 5-7, the temperature is 35 ℃, and at the moment, an ozone generator is started to generate ozone to bleach the paper pulp;

7) adjusting the pH value of the paper pulp to 10, adding a pH stabilizer Na2SiO3, and adding a proper amount of hydrogen peroxide reagent, wherein the temperature is increased to 90 ℃ at the moment, so that hydrogen peroxide further bleaches the paper pulp;

8) forming a wet paper web by the bleached paper pulp through an upper wire device;

9) the wet paper web enters a press part of the pressure shoe shape for dehydration and molding, so that the wet paper web is primarily dried;

10) and (4) drying the squeezed wet paper web in a drying cylinder, and cutting to obtain finished paper.

2. The office waste paper recycling method according to claim 1, characterized in that: and 3) adding a small amount of sodium silicate, sodium hydroxide and hydrogen peroxide into the ultrasonic cleaning tank.

Technical Field

The invention relates to the field of environmental protection, in particular to a method for recycling office waste paper.

Background

The office copying waste paper regeneration integrated device has the advantages of small volume compared with the traditional equipment, convenient use and operation and 100 percent recovery of waste paper. Waste office paper enters the machine from a paper inlet, passes through an internal pulping part, an enzyme-ultrasonic wave coordinated deinking system, an ozone-hydrogen peroxide green bleaching system, an ultrasonic wave-vibration system, a glue loading, pressing, cutting and other processes, and is output from an output port. The equipment is suitable for the field of paper concentration in schools, enterprises and the like.

China is a large consumption country of paper, but forest resources are lacked, the forest coverage rate is only 20.36 percent and is far lower than the level of developed countries, so various ecological environment problems caused by the production of paper by taking wood as a main raw material cannot be ignored; the development of the traditional papermaking industry in China has low starting point, high energy consumption, high emission, high pollution and low efficiency, and non-green and environment-friendly large-scale mechanical equipment is mostly adopted and is only suitable for large-scale mass production; the so-called "noble" office copy of paper is far less reusable than other paper grades. Relevant investigation shows that the utilization rate of office copying waste paper in China is low, the probability of directly discarding the office copying waste paper is about 95 percent, and the high-quality paper is discarded like a crawler, so that the problem of the environment is solved.

The research of Japan shows that the office waste paper utilization machine has the advantages of low price, large body size and high energy consumption, and the popularization degree is not high, for example, a white sheep for manufacturing toilet paper, a blue light dry paper deinking machine manufactured by adopting special ink and the like, and small-sized integrated equipment for reconstructing office copy waste paper into office paper is not available;

other European countries such as the United states and the like correspondingly set laws and regulations for waste paper recovery, strictly classify the waste paper, have more than 50 standards, adopt efficient recycling means for various paper products, achieve the waste paper recovery rate of about 93 percent, and have no related small mechanical inventions for a while.

Disclosure of Invention

The invention aims to provide a method for recycling office waste paper.

In order to achieve the purpose, the invention is implemented according to the following technical scheme:

an office waste paper recycling method comprises the following steps:

1) putting a certain amount of office waste paper into an extractor, heating in a constant-temperature water bath tank at 60 ℃, adding a solvent for extraction, adjusting the concentration of the pulp to 8% after the residual solvent in the extracted sample is evaporated, adding the pulp into a stirrer for waste paper disintegration, wherein the disintegration time is 45 min;

2) adding SKHZYE-DPE91 bio-enzyme into the crushed paper pulp for pretreatment before ultrasonic deinking;

3) placing the pretreated paper pulp in an ultrasonic cleaning tank for ultrasonic treatment for 10min, controlling the ultrasonic treatment temperature to be 40 ℃, controlling the ultrasonic treatment power to be 300W, controlling the ultrasonic treatment frequency to be 40kHz, and enabling the concentration of the paper pulp to reach 0.5 percent after treatment;

4) adjusting the concentration of the deinked paper pulp to 10-12%, adjusting the pH to 6 and adjusting the temperature to about 55 ℃;

5) adding prepared SKHZYE-DPE91 bio-enzyme again, wherein the reaction time is 20min;

6) after the biological enzyme treatment, the paper pulp is acidic, the pH value is 5-7, the temperature is 35 ℃, and at the moment, an ozone generator is started to generate ozone to bleach the paper pulp;

7) adjusting the pH value of the paper pulp to 10, adding a pH stabilizer Na2SiO3, and adding a proper amount of hydrogen peroxide reagent, wherein the temperature is increased to 90 ℃ at the moment, so that hydrogen peroxide further bleaches the paper pulp;

8) forming a wet paper web by the bleached paper pulp through an upper wire device;

9) the wet paper web enters a press part of the pressure shoe shape for dehydration and molding, so that the wet paper web is primarily dried;

10) and (4) drying the squeezed wet paper web in a drying cylinder, and cutting to obtain finished paper.

As a further preferable scheme of the invention, a small amount of sodium silicate, sodium hydroxide and hydrogen peroxide are added into the ultrasonic cleaning tank in the step 3).

Compared with the prior art, the method adopts the pretreatment technology of the biological enzyme, and breaks through the dependence of the traditional papermaking on chemical samples; the bleaching technology of mixing hydrogen peroxide and ozone which is easy to treat is adopted, so that the method is pollution-free, environment-friendly and capable of reducing the difficulty of wastewater treatment; the utilization rate of office copy waste paper is improved, the cost of office paper is reduced, the waste paper recycling rate of China is improved, water and energy are saved, the environment is protected, and meanwhile, the treatment devices in all steps can be integrated and automated, so that the device is convenient to popularize and use.

Detailed Description

The following further description is of specific embodiments of the invention, and the illustrative embodiments and illustrations herein are provided to explain the invention and not to limit the invention.

Example 1

An office waste paper recycling method comprises the following steps:

1) putting a certain amount of office waste paper into an extractor, heating in a constant-temperature water bath tank at 60 ℃, adding a solvent for extraction, adjusting the concentration of the pulp to 8% after the residual solvent in the extracted sample is evaporated, adding the pulp into a stirrer for waste paper disintegration, wherein the disintegration time is 45 min; in the process of immersing the waste paper, mild friction can be generated between waste paper fibers, so that the disintegrating effect is improved;

2) adding SKHZYE-DPE91 bio-enzyme into the crushed paper pulp for pretreatment before ultrasonic deinking;

3) placing the pretreated paper pulp in an ultrasonic washing tank added with a small amount of sodium silicate, sodium hydroxide and hydrogen peroxide for ultrasonic treatment for 10min, controlling the ultrasonic treatment temperature to be 40 ℃, controlling the ultrasonic treatment power to be 300W, controlling the ultrasonic treatment frequency to be 40kHz, and enabling the concentration of the paper pulp to reach 0.5 percent after treatment; softening the surface of the fiber and promoting the fibrosis of the surface of the fiber by ultrasonic waves;

4) adjusting the concentration of the deinked paper pulp to 10 percent, adjusting the pH to 6 and adjusting the temperature to 50 ℃;

5) adding prepared SKHZYE-DPE91 bio-enzyme again, wherein the reaction time is 20min;

6) after the biological enzyme treatment, the paper pulp is acidic, the pH value is 5, the temperature is 35 ℃, and at the moment, an ozone generator is started to generate ozone to bleach the paper pulp;

7) adjusting the pH value of the paper pulp to 10, adding a pH stabilizer Na2SiO3, and adding a proper amount of hydrogen peroxide reagent, wherein the temperature is increased to 90 ℃ at the moment, so that hydrogen peroxide further bleaches the paper pulp;

8) forming a wet paper web by the bleached paper pulp through an upper wire device;

9) the wet paper web enters a press part of the pressure shoe shape for dehydration and molding, so that the wet paper web is primarily dried;

10) and (4) drying the squeezed wet paper web in a drying cylinder, and cutting to obtain finished paper.

Example 2

An office waste paper recycling method comprises the following steps:

1) putting a certain amount of office waste paper into an extractor, heating in a constant-temperature water bath tank at 60 ℃, adding a solvent for extraction, adjusting the concentration of the pulp to 8% after the residual solvent in the extracted sample is evaporated, adding the pulp into a stirrer for waste paper disintegration, wherein the disintegration time is 45 min; in the process of immersing the waste paper, mild friction can be generated between waste paper fibers, so that the disintegrating effect is improved;

2) adding SKHZYE-DPE91 bio-enzyme into the crushed paper pulp for pretreatment before ultrasonic deinking;

3) placing the pretreated paper pulp in an ultrasonic washing tank added with a small amount of sodium silicate, sodium hydroxide and hydrogen peroxide for ultrasonic treatment for 10min, controlling the ultrasonic treatment temperature to be 40 ℃, controlling the ultrasonic treatment power to be 300W, controlling the ultrasonic treatment frequency to be 40kHz, and enabling the concentration of the paper pulp to reach 0.5 percent after treatment; softening the surface of the fiber and promoting the fibrosis of the surface of the fiber by ultrasonic waves;

4) adjusting the concentration of the deinked paper pulp to 12 percent, adjusting the pH to 6 and adjusting the temperature to 55 ℃;

5) adding prepared SKHZYE-DPE91 bio-enzyme again, wherein the reaction time is 20min;

6) after the biological enzyme treatment, the paper pulp is acidic, the pH value is 7, the temperature is 35 ℃, and at the moment, an ozone generator is started to generate ozone to bleach the paper pulp;

7) adjusting the pH value of the paper pulp to 10, adding a pH stabilizer Na2SiO3, and adding a proper amount of hydrogen peroxide reagent, wherein the temperature is increased to 90 ℃ at the moment, so that hydrogen peroxide further bleaches the paper pulp;

8) forming a wet paper web by the bleached paper pulp through an upper wire device;

9) the wet paper web enters a press part of the pressure shoe shape for dehydration and molding, so that the wet paper web is primarily dried;

10) and (4) drying the squeezed wet paper web in a drying cylinder, and cutting to obtain finished paper.

Example 3

The integrated device can enter into group office places such as schools, enterprises and the like, and is prepared by the following equipment:

the prices for paper made using these devices are as follows:

using the method of the invention paper is reproduced with these devices compared to the price of ordinary a4 paper:

the common paper mill produces office paper = the cost of raw wood plus the cost of labor plus high profit plus the cost of wastewater treatment plus the cost of water and electricity plus the cost of a large amount of chemical reagents;

the method of the invention is used for producing office paper with the equipment, wherein the cost of manpower, the cost of water and electricity and the cost of a small amount of chemical reagents are =;

the above data analysis shows that the cost of the equipment, i.e. the retrievable equipment, for producing 1.21 tonnes of office paper using the process of the present invention, is reduced by 7276.22 yuan only from an economic perspective, after which, for every 1 tonne of paper produced using the apparatus. Therefore, the method of the invention has objective economic application prospect and wide market application prospect by utilizing the devices.

The technical solution of the present invention is not limited to the limitations of the above specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.