KR100713133B1 - A pulp-processing method using a cane - Google Patents

Abstract

SUMMARY OF THE INVENTION An object of the present invention is to provide a production method for obtaining pulp for paper stock using cane such as corn stalks, sugar cane stalks, etc. (hereinafter, simply referred to as "corn stalks").

In the present invention, the collected cornstalks are dried to have a water content of 20 to 30% or less, and then the dried cornstalks are cut into lengths of 10 to 20mm, and the cut cornstalks have a core of the cornstalks. It is separated from the shell or broken into pieces of 2 ~ 5mm to expose the seam to the outside. Wind power is applied to the crushed crushed material as well as a predetermined vibration, and only the light pits of the crushed matter are separated and discharged from the shell. The remaining shell is stored in hot industrial water at 50 ° C. for at least 24 hours to call the shell. 0.2mmm thick through several chains and screenings through a screen soaked with water and at least three refiners and screens with holes of a certain size Only the following pulp can be collected. The pulp thus obtained can be used as a raw material for making paper packaging boxes of higher or lower grades.

Corn stalks, sugar cane, kane, pulp

Description

A pulp-processing method using a cane}

1 is a block diagram of a manufacturing method of pulp for papermaking material using a Cane (Cane) according to the present invention,

FIG. 2 is a schematic diagram of the air separator in FIG. 1. FIG.

* Explanation of symbols for main parts of drawings *

100: drying process

200: cutting process

300: shredding process

400: Pneumatic Separation Process

500: water soaking process

600: Refining and Screening Process

The present invention relates to a manufacturing method of obtaining pulp for paper stock using canes such as corn stalks, sugar cane stalks, etc. (hereinafter, simply referred to as "corn stalks"). It would increase the resource utilization of the abandoned corn stand.

In general, corn stalks are used for other purposes such as livestock feed or other firewood when the corn has been harvested, but most of them are lost in the field, causing loss of resources. there is a problem.

In particular, when the corn stand is left to rot, it can be used as a compost in the field, but on the other hand, it provides a habitat for wild mammals such as rats, which causes harmful germs to spread. It also causes pollution.

Another problem is that existing trees are used as paper raw materials, which adversely affects tree conservation and global environmental conservation.

On the other hand, due to the use of chemicals in the existing Bagasse Pulp Mill, a chemical recovery system or a special wastewater treatment requires facility costs, and the cost of the facilities is increased, and a chemical recovery facility ( There is a problem that power consumption costs, labor costs, etc. resulting from the use of Chemical Recovery System) or wastewater treatment facilities are required.

Therefore, the object of the present invention was developed by the results of polite research in view of the above-mentioned problems, but the yield is lower than wood, but also used as a pulp for high-quality paper stock, especially paper making a low-quality packaging box The present invention provides a method for producing a pulp for papermaking material using cane, which can be utilized as a pulp for raw materials to increase the value of reuse of resources and maintain natural environment conservation and tree conservation.

The other purpose is that it does not use any chemicals, so it provides the effect of pollution-free, which is friendly to nature, and the chemical recovery system or special wastewater treatment does not require facility costs, so the facility cost can be reduced. In addition, the present invention provides a method of manufacturing pulp for papermaking fee using cane, which saves power consumption and labor costs.

In order to achieve the above object, the manufacturing method of the pulp for refinishing material using the cane of the present invention (Cane) is dried to maintain the drying rate of the corn stand and sugar cane stand after the pretreatment operation such as leaf removal to 70 or more than 80% Step for; Cutting the dried corn stand and the sugar cane stand with a length of 10-20 mm; Crushing the cut corn stalks and the sugar cane stalks to a size of 2 to 5 mm; Imparting wind power as well as vibration force to the crushed material to separate and discharge only the light seam Pith from the shell by the difference in weight; Collecting only the remaining shell and storing it in hot industrial water at 50 ° C. for at least 24 hours to call the shell; The thickness of 0.2 mm or less is achieved through screening with a number of fine chains and a certain size of filtration holes through a refiner arranged with at least three shells called water. It is characterized in that it comprises a filtration step for filtering only the pulp.

In the filtration step, at least three crystallizers and a corresponding number of screens are disposed to filter only pulp while passing through the crystallizer and the screen alternately.

In addition, the ratio between the industrial water and the shell in the pinching step is preferably at least 90:10.

Hereinafter, with reference to the accompanying drawings will be described in more detail with respect to the manufacturing method of the pulp for the support material using the same Cane (Cane) of the present invention.

1 is a block diagram of a method for producing a pulp for papermaking material using Cane according to the present invention, Figure 2 is a schematic diagram of an air separator in FIG.

As shown in the drawing, the manufacturing method of the present invention is a drying process (100) → cutting process (200) → crushing process (300) → air separation (Pneumatic Separation) process (400) → water soaking (puffing) process (500) And filtration process (Refining and Screening) (600), which will be described below for each process.

<Drying process: 100>

Since cornstalks collected from the fields generally contain moisture, they are dried to reduce moisture. The drying rate is good at 100%, but only 70 to 80% may be maintained. Although the drying method at this time is not specifically defined, natural drying may be good and it can dry using hot air as needed. In addition, the reason for drying the cornstalk will be explained later in the Pneumatic Separation process (300), but the shell and the inner core (Pith) of cornstalks used directly to make pulp, which is a raw material for papermaking, will be described. To separate them efficiently.

<Cutting process: 200>

The dried corn stand is cut into sizes having a length of approximately 10-20 mm using a previously prepared cutter. The reason for cutting to the same size as above is to facilitate the shredding in the next shredding process. In addition, the cutting machine used for cutting the corn stem may be any cutter as long as it can cut the corn stem to the same size as described above, but it is preferable to use an automated cutter for the efficiency of the work. In addition, since such a cutter is a general one, a detailed description thereof is omitted in the present embodiment.

 <Crushing process: 300>

The cut cornstalks are transferred to a ready crusher, and then crushed by the crusher as an irregular size of approximately 2 to 5 mm. The reason for the crushing is that the pits of the cut cornstalk are separated from the shells or exposed to the outside, so that the pits of the cut cornstalks are removed in the air separation process 400 described later. The purpose is to separate the shell and corn inside of the corn stove, which is used directly to make pulp, a raw material for fat. Shredder also can be used to shred the cut cornstalk to the size of 2 ~ 5mm, any conventional shredder may be used. In addition, since the shredder used in the present invention is also general, another detailed description is omitted in this embodiment.

 <Air separation process: 400>

Shreds of crushed corn stalks are sent to a Pneumatic Separator, which separates the shells of the corn stalks, which are directly used to make pulp, the raw material for papermaking, from the internal core. Separation work using wind power of air.

In the crushing process, the shell and the core are mixed with each other, so they need to be separated from each other. These separations are made using wind power because they can be easily separated by using the weight difference between the shell and the core, and since the crushed material of the corn stand is already dried in the drying process, when the wind is applied to the crushed material, it is mixed. Only the lightest core among the shells and cores of the shredded material can be scattered into the air, allowing it to be quickly separated from the shell. In this case, in order to more effectively separate the shell and the core material, it is good to give a vibration force to the crushed material.

An example of the apparatus for this is shown in FIG. 2. As shown in the drawing, the crushed object 10 can be raised by a mesh belt 410 forming a mesh structure, and vibrators 420a and 420b at both ends of the mesh belt 410. In the lower part of the mans belt 410, wind power generators 430a and 430b for generating wind may be installed.

With this configuration, when the debris 10 placed on the mesh belt 410 is subjected to vibration of the vibrators 420a and 420b, the debris 10 is evenly spread on the mesh belt 410. In this case, if the wind is applied from the wind turbines 430a and 430b, only the light seam among the shell and the seam of the crushed material can be scattered in the air. Can be used as fuel.

In the above, the wind turbine is a device such as a fan made using a large fan. In addition, the above-described air separator is just an example described as a means of the air separation process according to the present invention, and any device other than the apparatus of FIG. 2 described above is a device capable of separating the shell and the shim material. You can use it.

<Water swelling (puffing) process: 500>

The shell separated from the Pith is stored in hot industrial water at 50 ° C. for 24 hours or more in a reservoir to sufficiently call the shell. The reason why the shell is called water is to make the shell into pulp, with the ratio of water to shell being approximately 90:10.

<Selection and Filtration Process: 600>

The shells soaked in water form a pulp that can be used as a paper stock through several repeated refining and screening operations.

In other words, a shell called water has three or more screens having several operations and constant filter holes through at least three refiners (621-623). Plate works to achieve pulp characteristics of 0.2 mm or less, the final raw material of paper. The process will be described with reference to FIG.

The shells soaked in water are crushed by the first crusher 621, which is preliminarily prepared. In the crushing operation, a first screen (Plate Plate) having a perforation of about 3 to 4 mm is formed for homogeneous crushing. 631), wherein the fiber for paper raw material that has passed through the filtration hole of the first screen 631 is transferred to a second crystallizer 622, which is the same as the first crystallizer 621, and the first crystallizer 621. After passing through the same operation as the)) is transferred to the second screen 632, the same as the first screen 631 to perform the second filtration operation.

On the other hand, the fiber for the paper raw material that does not pass through the filtration hole of the first screen 631 is sent to the first crusher 621 to perform the crushing (selection) again.

Through this repetitive work, the fiber for paper raw material that passes through a slot of about 0.2 to 0.3 mm of the final third screen 633 goes to the mixing chest, and the paper type and Depending on the application, it can be mixed with long fiber and can be used as a paper machine, or can be used alone.

The fibers that do not pass through the third screen 633 are returned to the third crusher 623 disposed in front of them to be subjected to the crushing process again. In conclusion, the filtration and screening are repeated several times (about 3 times). Only the fiber for paper raw materials that passed through the final screen 633 having a slot of about 0.2 to 0.3 mm is passed to the mixing (or machine chest) material, that is, paper (stock) It will be used as

In the above description, only one example of performing the selection and filtration three times is described, but it may be more than that. However, only three times, the selection and filtration of the present invention can be sufficiently achieved. In addition, since a printing press, a screen, a mixing tray, a paper machine, etc. are generally used by a papermaking company, detailed description is abbreviate | omitted in this invention.

In addition, the fiber for the paper raw material manufactured through the above method of the present invention can be used for the production of white paper or printing paper (Fine paper or Printing / Writing Paper), but it must be separately bleaching (bleaching). Bleaching requires a lot of bleaching equipment cost and bleach is a pollutant, so corn pulp is more effective for industrial paper (Packing Paper, Liner Board, Corrugating Medium Paper) or Filler Layer of Duplex Board Paper.

In addition, in the above embodiment, the cornstalk and the sugar cane stand have been described as an example, but it can be easily understood from the above examples that the plant has a cane or straw structure such as the cornstalk and the sugar cane bag. will be.

In the above embodiment, but divided into each process in order to help the understanding of the present invention, in practice it is preferable to be carried out automatically and continuously in order to increase the productivity and efficiency of the work.

As described above, according to the present invention, firstly, unlike the existing bagasse pulp process, there is an effect of being pollution-free with nature by using no chemicals, and thus, the existing bagasse pulp industry (Bagasse Pulp Mill) The chemical recovery system or special wastewater treatment that is needed by the company does not require facility costs, thereby reducing the cost of the facility.

Secondly, in terms of yield, the conventional Soda process or chemical process is only about 30%, but the method according to the present invention has an effect of more than 70%.

Third, there is an effect that power consumption, labor costs, etc., resulting from the use of a chemical recovery system or a wastewater treatment facility are saved.                     

Fourth, by using cornstalks discarded as they are in the field, the use of resources is enhanced and the trees can be conserved compared to the use of existing trees as paper raw materials.

Claims (3)

Drying to maintain a dryness ratio of the harvested corn cob 70 to 80% or more; Cutting the dried corn cob into a length of 10-20 mm; The cut cornstalk may be crushed to a size of 2 to 5 mm so that the pits of the cornstalk are separated from the shell or exposed to the outside; Separation step for imparting a vibrating force and wind power to the cornstalk crushed matter, to separate and discharge only the light seam (Pith, 중) from the shell (Shell) by the weight difference; A pinching step for collecting only the remaining shells and storing them in hot industrial water at 50 ° C. for at least 24 hours to call the shells; And It has a thickness of 0.2mmm or less through a screen having a plurality of crystals and a certain size of filter holes through a refiner disposed at least three to shells called water. Method of producing a pulp for the refining material using Cane (Cane) comprising a selection and filtration step for collecting only pulp. The paper-making pulp of claim 1, wherein the screen is arranged in a number corresponding to the crystallizer so that a shell called water alternately passes through the crystallizers and the screens. Manufacturing method. The method of claim 1, wherein the ratio of the industrial water and the shell in the pinching step is at least 90:10.

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