KR102644905B1 - Method for producing dried bamboo using high heat treatment and dried bamboo produced thereby - Google Patents

Abstract

The present invention relates to a method for manufacturing a dried porridge material using high heat treatment which enables mass production in a short time by using high heat treatment and minimizes cleavage generated during drying. The manufacturing method comprises: a raw porridge preparation step (S10) of preparing raw porridge; a raw porridge loading step (S20) of loading the prepared raw porridge; a raw porridge input step (S30) of inputting the loaded raw porridge into a high heat treatment device; a temperature raising pretreatment step (S40) of pretreating the raw porridge by heating the inside of the high heat treatment device; a temperature raising steaming step (S50) of steaming the raw porridge by heating the inside of the high heat treatment device; a temperature raising drying and steaming step (S60) of drying and steaming the raw porridge by heating the inside of the high heat treatment device; a temperature raising high heat treatment step (S70) of performing high heat treatment on the raw porridge by heating the inside of the high heat treatment device; a natural cooling step (S80) of stopping the heating of the high heat treatment device and naturally cooling the same; and a porridge material discharge step (S90) of discharging the dried and heat-treated porridge material from the high heat treatment device.

Description

Method for manufacturing dried bamboo ash using high heat treatment and dried bamboo ash produced thereby {METHOD FOR PRODUCING DRIED BAMBOO USING HIGH HEAT TREATMENT AND DRIED BAMBOO PRODUCED THEREBY}

The present invention relates to a method for producing dried bamboo wood, and more specifically, a method for producing dried bamboo wood using high heat treatment that enables mass production in a short time and minimizes the splitting heat generated during drying, and the method of manufacturing dried bamboo wood produced thereby. It is about dried bamboo ash.

In general, bamboo has excellent mechanical strength, elegant color, antibacterial properties, good thermal conductivity, and provides negative ions, and has excellent properties as a material for crafts, household goods, and interior decoration.

Due to these excellent characteristics of bamboo, bamboo has been applied for a variety of purposes, such as containers for cooking, storing, and maturing food such as meat, grains, and fermented foods, pillows, mats, the body of lights, and cultivation containers for bean sprouts, etc. It has been done.

Recently, dried bamboo wood, which is manufactured by drying the felled bamboo itself, that is, the whole raw bamboo to lower the moisture content, is widely used for construction, indoor and outdoor decoration, or for fences.

Recently, several attempts have been made to prevent bamboo from splitting. A method of sealing (wrapping) with a moisture barrier film such as Korean paper to block moisture evaporation through both ends of the bamboo and then drying it in a dryer was also proposed.

In addition, to prevent splitting, a method of placing bamboo in an impregnation tank with PEG (polyethylene glycol), impregnating it for a certain period of time, and then drying the bamboo was proposed. Bamboo that has been treated and dried in this way can effectively prevent splitting during use. You can.

In addition, in order to prevent cracks from occurring in bamboo when drying, it has been proposed to remove the thin diaphragm formed on the inside of the bamboo and then heat dry the bamboo.

However, the above prior art had the following problems.

Conventionally, dried bamboo ash was manufactured through pretreatment such as boiling raw bamboo with chemicals, sealing (wrapping) both ends, and removing the inner bamboo diaphragm. This makes it possible to manufacture dried bamboo ash on a small laboratory scale, but in large quantities in a short period of time. It was relatively difficult to produce, and depending on the environment it was exposed to, it easily split during drying, resulting in a very high defect rate.

In addition, many studies have been conducted to prevent splitting of bamboo, but bamboo wood with a large diameter of about 10 cm and a long axis of 4 m in length is boiled with chemicals, sealed at both ends, or the internal diaphragm of the bamboo is used. There has never been an attempt to mass-produce cylindrical high-heat-treated dried bamboo wood with little splitting and very low moisture content by only high-heat treatment without removal.

Registered Patent No. 2014000 “Bamboo building materials and manufacturing method thereof, walls using the same” (2019.08.19.) Registered Patent No. 1874166 “Bamboo drying method using PEG” (2018.06.27.) Registered Patent No. 0457232 “Drying method to prevent splitting of whole bamboo” (2004.11.04.) Publication Patent No. 2009-0118130 “Bamboo crack prevention drying method” (2009.11.18)

Accordingly, the present invention was devised to solve all the problems of the prior art as described above.

The purpose of the present invention is to provide a dry bamboo wood manufacturing method using high heat treatment that enables mass production in a short time and minimizes the splitting heat generated during drying, and dried bamboo wood produced thereby.

In order to achieve the above object, the "method for producing dried bamboo using high heat treatment" according to the present invention includes the steps of preparing raw bamboo by cutting raw bamboo into a certain length and preparing it into a plurality of pieces; A raw porridge loading step of putting the prepared raw porridge into a drying frame and loading it in the form of a square cube; A raw bamboo input step of inserting the drying frame loaded with the raw bamboo into a high heat processor through a door and sealing the high heat processor by closing the door of the high heat processor; A pretreatment step of heating the interior of the high heat processor to raise the temperature from room temperature to 60 to 70 degrees Celsius and then maintaining the temperature at 60 to 70 degrees Celsius for 6 to 8 hours; A temperature-raising boiling step in which the inside of the high heat processor is heated to a temperature of 90 to 100 degrees Celsius, and then the temperature is maintained at 90 to 100 degrees Celsius for 8 to 10 hours to steam the raw bamboo with high-temperature moisture discharged from the raw bamboo. and; After heating the inside of the high heat processor to raise the temperature to 100 to 120 degrees Celsius, the temperature is maintained at 100 to 120 degrees Celsius for 26 to 30 hours to evaporate the moisture discharged from the raw bamboo and steam the raw bamboo while drying it with steam. A temperature-elevated drying and steaming step; A high-temperature high heat treatment step of heating the inside of the high heat treatment machine to a temperature of 130 to 160 degrees Celsius and then maintaining the temperature of 130 to 160 degrees Celsius for 4 to 6 hours to high heat treat the dried bamboo wood; a natural cooling step of stopping heating of the inside of the high heat treater and naturally cooling the high heat treater so that the internal temperature of the high heat treater reaches between 70 and 80 degrees Celsius; A bamboo ash discharge step of opening the door of the high heat treatment machine after natural cooling is completed and discharging dried and heat-treated bamboo ash; It is characterized by including.

In addition, the raw bamboo preparation step of the "method for producing dried bamboo using high heat treatment" according to the present invention further includes the step of removing foreign substances and wax remaining on the outer surface of the prepared raw bamboo by wiping it with water or an alcohol swab, The raw bamboo loading step is a process of arranging a plurality of spacers perpendicularly between the raw bamboo disposed up and down when loading the raw bamboo into the drying frame, and after the loading of the raw bamboo into the drying frame is completed, the loaded raw bamboo is It is characterized in that it further includes the process of tying and fixing it together with a metal band.

In addition, the "method for manufacturing dried bamboo ash using high heat treatment" according to the present invention includes a raw bamboo pretreatment step of applying a liquid transparent acrylic resin in a strip shape at regular intervals to the outer peripheral surface of the raw bamboo before the raw bamboo preparation step; It is characterized by including more.

In addition, the bamboo material preparation step of the "method for producing dried bamboo material using high heat treatment" according to the present invention is a process of cutting the raw bamboo and then partially adhering an adhesive material containing silver foil or clay or red clay to the outer peripheral surface of the raw bamboo. It further includes, wherein the bamboo ash discharging step further includes a process of removing an adhesive material adhered to the outer surface of the discharged bamboo ash after discharging the dried bamboo ash.

Meanwhile, in order to achieve the above object, the “dry bamboo ash produced by a dry bamboo ash manufacturing method using high heat treatment” according to the present invention includes a raw bamboo preparation step of cutting raw bamboo to a certain length and preparing it into a plurality of pieces; A raw porridge loading step of putting the prepared raw porridge into a drying frame and loading it into a square cube; A raw bamboo input step of inserting the drying frame loaded with the raw bamboo into a high heat processor through a door and sealing the high heat processor by closing the door of the high heat processor; A pretreatment step of heating the interior of the high heat processor to raise the temperature from room temperature to 60 to 70 degrees Celsius and then maintaining the temperature at 60 to 70 degrees Celsius for 6 to 8 hours; A temperature-raising boiling step in which the inside of the high heat processor is heated to a temperature of 90 to 100 degrees Celsius, and then the temperature is maintained at 90 to 100 degrees Celsius for 8 to 10 hours to steam the raw bamboo with high-temperature moisture discharged from the raw bamboo. and; After heating the inside of the high heat processor to raise the temperature to 100 to 120 degrees Celsius, the temperature is maintained at 100 to 120 degrees Celsius for 26 to 30 hours to evaporate the moisture discharged from the raw bamboo and steam the raw bamboo while drying it with steam. A temperature-elevated drying and steaming step; A high-temperature high heat treatment step of heating the inside of the high heat treatment machine to a temperature of 130 to 160 degrees Celsius and then maintaining the temperature of 130 to 160 degrees Celsius for 4 to 6 hours to high heat treat the dried bamboo wood; a natural cooling step of stopping heating of the inside of the high heat treater and naturally cooling the high heat treater so that the internal temperature of the high heat treater reaches between 70 and 80 degrees Celsius; A bamboo ash discharge step of opening the door of the high heat treatment machine after natural cooling is completed and discharging dried and heat-treated bamboo ash; It is manufactured with a brown color on the outside and a moisture content of 5% to 12%.

As described above, the present invention enables mass production in a short time using high heat treatment, minimizes the splitting heat generated during drying, and thus minimizes the defective rate of dried bamboo material, thereby significantly improving productivity.

1 is a step diagram showing a method for manufacturing dried bamboo according to the present invention;
Figures 2 to 5 are photographs showing a method for manufacturing dried bamboo according to the present invention;
Figure 6 is a comparative photograph showing dried bamboo wood manufactured according to the dry bamboo wood production method according to the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in more detail with reference to the accompanying drawings. However, it should be understood that the invention may be implemented in many different forms and is not limited to the described embodiments.

Figures 1 to 6 are drawings and photographs showing a method for manufacturing dried bamboo according to the present invention. As presented herein, the method for producing dried bamboo using high heat treatment according to the present invention includes a raw bamboo preparation step (S10) of preparing raw bamboo, a raw bamboo loading step (S20) of loading the prepared raw bamboo, and the loaded raw bamboo into a high heat treatment unit. A step of introducing raw bamboo (S30), a temperature raising pretreatment step of pre-treating the raw bamboo by heating the inside of the high heat processor (S40), a temperature raising step of boiling the raw bamboo by heating the inside of the high heat processor (S50), and a high heat processor. A temperature-elevated drying and steaming step (S60) in which the raw bamboo is dried and steamed by heating the inside of the high-heat treater, a temperature-elevated high-heat treatment step (S70) in which the raw bamboo is high-heat treated by heating the inside of the high-heat treater, and the heating of the high-heat treater is stopped and natural It includes a natural cooling step (S80) of cooling and a bamboo ash discharge step (S90) of discharging dried and heat-treated bamboo ash from a high heat processor.

The raw bamboo preparation step (S10) refers to the step of cutting raw bamboo to a certain length and preparing it into multiple pieces. This step involves cutting raw bamboo, that is, felled raw bamboo, to a certain length to facilitate loading and insertion.

The raw porridge preparation step (S10) further includes a process of removing foreign substances and wax remaining on the outer surface of the prepared raw porridge by wiping it with water or an alcohol swab. This process is intended to clean the outer surface of the raw bamboo so that the drying and high heat treatment of the raw bamboo is carried out smoothly and evenly (see Figure 2).

The bamboo preparation step (S10) further includes cutting the raw bamboo and then partially adhering an adhesive material containing silver foil or clay or red clay to the outer peripheral surface of the raw bamboo. This process involves drying and heat-treating materials such as silver foil, clay, and red clay adhered to the outer surface of the bamboo material to form a specific shape after the bamboo material dries, resulting in a variety of colors due to color differences between the areas where the material is attached and those where the material is not attached. The goal is to improve aesthetics while being able to embody the shape.

The method of manufacturing bamboo material further includes a raw bamboo pretreatment step (S00) of applying a liquid transparent acrylic resin in a strip shape to the outer peripheral surface of the raw bamboo at regular intervals before the raw bamboo preparation step (S10). This step involves applying acrylic resin in a strip shape at regular intervals before heat treatment to minimize splitting or distortion that occurs during drying and use of the bamboo, thereby significantly extending its lifespan.

The raw porridge loading step (S20) refers to a step of putting the prepared raw porridge into a drying frame and loading it in the form of a square cube. In this step, the raw porridge is stacked in the form of a square cube using a drying frame so that it can be properly put into the high heat treatment machine.

The raw bamboo loading step (S20) includes the process of arranging a plurality of spacers perpendicularly between the raw bamboo disposed up and down when loading the raw bamboo into the drying frame, and the loading of the raw bamboo into the drying frame is completed. It further includes the process of tying and fixing the loaded raw bamboo together with a metal band. Here, the spacer refers to a spoke made of wood.

The process of arranging the spacer is to form a spaced space between the raw bamboo and the raw bamboo stacked up and down, so that air circulation is smooth and drying and high heat treatment are performed uniformly and stably, and the raw bamboo is fixed. This process is to ensure that the raw bamboo is properly prevented from being distorted during drying and high heat treatment (see Figure 3).

The raw bamboo input step (S30) refers to the step of inserting the drying frame loaded with the raw bamboo into the high heat processor through the door and closing the door of the high heat processor to seal the high heat processor. In this step, the loaded raw porridge is put into a high heat treatment machine to prepare for drying and high heat treatment (see Figure 4).

The temperature increase pretreatment step (S40) refers to a step of heating the inside of the high heat treatment machine to raise the temperature from room temperature to 60 degrees Celsius to 70 degrees Celsius and then maintaining the temperature of 60 degrees Celsius to 70 degrees Celsius for 6 hours to 8 hours. This step heats the raw porridge to a low temperature to slowly release moisture.

The temperature increase and self-simmering step (S50) refers to a step of heating the inside of the high heat processor to a temperature of 90 to 100 degrees Celsius and then maintaining the temperature of 90 to 100 degrees Celsius for 8 to 10 hours. This step is to steam the raw bamboo with high-temperature moisture released from the raw bamboo, thereby minimizing splitting of the raw bamboo during subsequent processing.

The temperature-elevated drying and steaming step (S60) refers to a step of heating the inside of the high heat processor to a temperature of 100 to 120 degrees Celsius and then maintaining the temperature of 100 to 120 degrees Celsius for 26 to 30 hours. This step evaporates the moisture released from the raw bamboo and dries the raw bamboo with steam while steaming it, that is, drying the raw bamboo in a state that prevents splitting.

The high-temperature high-heat treatment step (S70) refers to a step of heating the inside of the high-heat treater to a temperature of 130 to 160 degrees Celsius and then maintaining the temperature of 130 to 160 degrees Celsius for 4 to 6 hours. This step serves to produce dried bamboo ash with brown color and high strength by treating the dried bamboo ash with high heat.

The natural cooling step (S80) refers to a step of stopping heating inside the high heat treater and naturally cooling the high heat treater so that the internal temperature of the high heat treater reaches between 70 and 80 degrees Celsius. This step is to naturally cool the bamboo to prevent splitting due to rapid cooling.

The bamboo ash discharge step (S90) refers to opening the door of the high heat treatment machine after natural cooling is completed and discharging the dried and heat-treated bamboo ash (see Figure 5).

Here, the high-heat-treated bamboo wood takes on various colors depending on the temperature, which can be seen through the comparison photo in FIG. 6.

The bamboo ash discharge step (S90) further includes a process of removing the adhesive material adhered to the outer surface of the discharged bamboo ash after discharging the dried bamboo ash. This process serves to remove the adhesive material attached in the previous step to realize color differences.

The dried bamboo wood manufactured by this method of manufacturing dried bamboo wood using high heat treatment is manufactured by the above production method, has a brown color on the outside, has a moisture content of 5% to 12%, and has minimal discoloration when exposed to the outdoors. It exhibits high dimensional stability against moisture and has relatively strong elasticity. In particular, the high heat treatment temperature maintained without change in external color and physical properties (elasticity and rigidity) was analyzed to be 140 to 150 degrees Celsius (see FIG. 6).

Hereinafter, the physical properties of bamboo manufactured according to the present invention are shown through experimental examples as follows.

<Experimental example>

Harvested raw bamboo (whole bamboo) measuring 10cm in diameter and 3.7m in length was dried at room temperature or in a high heat processor while changing the temperature, and the phenomena that occur after being exposed to the outdoors for about a year are shown in [Table 1] below. It was.

heat treatment
temperature
(℃) splitting incidence rate
(%) moisture content

(%) Total weight
diameter
decline rate
(%) dry
hour
(Day) Color after drying
change External changes according to outdoor exposure (1 year) Comparative example room temperature One 61.6 0.65 1.5 180 green changes to light yellow
mold growth Experimental Example 1 130 8 5.8 0.90 13.8 2.5 light brown changes to yellow
No mold Experimental Example 2 140 10 3.5 1.02 15.0 3.5 brown stay brown
No mold Experimental Example 3 155 20 2.2 1.12 18.8 5.0 dark brown Maintain dark brown color
mold growth

As shown in [Table 1], as a result of examining the splitting occurrence rate, moisture content change, diameter reduction rate, drying time, color change, and mold occurrence of bamboo wood according to drying and high heat treatment, the physical properties were the highest at a heat treatment temperature of 140°C. It was analyzed as good.

Although the preferred embodiments of the present invention have been described above, various changes, modifications, and equivalents may be used in the present invention. It is clear that the present invention can be equally applied by appropriately modifying the above embodiment. Accordingly, the above description does not limit the scope of the present invention, which is defined by the limitations of the claims below.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but it will be obvious to those skilled in the art that various modifications are possible without departing from the scope of the present invention.

Claims (5)

A raw bamboo preparation step (S10) of cutting raw bamboo to a certain length and preparing it into multiple pieces;
A raw bamboo loading step (S20) of putting the prepared raw bamboo into a drying frame and loading it in the form of a square cube;
A raw bamboo input step (S30) of inserting the drying frame loaded with the raw bamboo into the high heat processor through a door and sealing the high heat processor by closing the door of the high heat processor;
A temperature increase pretreatment step (S40) of heating the inside of the high heat processor to raise the temperature from room temperature to 60 to 70 degrees Celsius and then maintaining the temperature at 60 to 70 degrees Celsius for 6 to 8 hours;
A temperature-raising boiling step in which the inside of the high heat processor is heated to a temperature of 90 to 100 degrees Celsius, and then the temperature is maintained at 90 to 100 degrees Celsius for 8 to 10 hours to steam the raw bamboo with high-temperature moisture discharged from the raw bamboo. (S50) and;
After heating the inside of the high heat processor to raise the temperature to 100 to 120 degrees Celsius, the temperature is maintained at 100 to 120 degrees Celsius for 26 to 30 hours to evaporate the moisture discharged from the raw bamboo and steam the raw bamboo while drying it with steam. A temperature-elevated drying and steaming step (S60);
A high-temperature high heat treatment step (S70) of heating the inside of the high heat treatment machine to a temperature of 130 to 160 degrees Celsius and then maintaining the temperature of 130 to 160 degrees Celsius for 4 to 6 hours to high heat treat the dried bamboo material; ;
A natural cooling step (S80) of stopping the heating of the inside of the high heat treater and naturally cooling the high heat treater so that the internal temperature of the high heat treater reaches between 70 and 80 degrees Celsius;
After natural cooling is completed, the door of the high heat processor is opened and the dried and heat-treated bamboo ash is discharged (S90);
A method of manufacturing dried bamboo using high heat treatment, comprising:
According to paragraph 1,
In the raw porridge preparation step (S10),
It further includes a process of removing foreign substances and wax remaining on the outer surface of the prepared raw bamboo by wiping it with water or alcohol swab,
In the raw porridge loading step (S20),
When loading fresh bamboo into the drying frame, a process of arranging a plurality of spacers perpendicularly between the raw bamboo disposed above and below the raw bamboo,
A method of manufacturing dried bamboo material using high heat treatment, further comprising the step of tying and fixing the loaded raw bamboo with a metal band after the loading of the raw bamboo on the drying frame is completed.
According to paragraph 1,
The bamboo manufacturing method is,
Before the raw bamboo preparation step (S10), a raw bamboo pretreatment step (S00) of applying a liquid transparent acrylic resin in a strip shape to the outer peripheral surface of the raw bamboo at regular intervals;
A method of manufacturing dried bamboo using high heat treatment, further comprising:
According to paragraph 1,
The raw bamboo preparation step (S10) further includes cutting the raw bamboo and then partially adhering an adhesive material containing silver foil or clay or red clay to the outer peripheral surface of the raw bamboo,
In the bamboo ash discharge step (S90),
A method of manufacturing dried bamboo wood using high heat treatment, further comprising removing the adhesive material attached to the outer surface of the discharged bamboo wood after discharging the dried bamboo wood.
A raw bamboo preparation step of cutting raw bamboo to a certain length and preparing it into multiple pieces; A raw porridge loading step of putting the prepared raw porridge into a drying frame and loading it into a square cube; A raw bamboo input step of inserting the drying frame loaded with the raw bamboo into a high heat processor through a door and sealing the high heat processor by closing the door of the high heat processor; A pretreatment step of heating the interior of the high heat processor to raise the temperature from room temperature to 60 to 70 degrees Celsius and then maintaining the temperature at 60 to 70 degrees Celsius for 6 to 8 hours; A temperature increase boiling step in which the inside of the high heat processor is heated to a temperature of 90 to 100 degrees Celsius and then the temperature is maintained at 90 to 100 degrees Celsius for 8 to 10 hours to steam the raw bamboo with high-temperature moisture discharged from the raw bamboo. and; After heating the inside of the high heat processor to raise the temperature to 100 to 120 degrees Celsius, the temperature is maintained at 100 to 120 degrees Celsius for 26 to 30 hours to evaporate the moisture discharged from the raw bamboo and steam the raw bamboo while drying it with steam. A temperature-elevated drying and steaming step; A high-temperature high heat treatment step of heating the inside of the high heat treatment machine to a temperature of 130 to 160 degrees Celsius and then maintaining the temperature of 130 to 160 degrees Celsius for 4 to 6 hours to high heat treat the dried bamboo wood; a natural cooling step of stopping heating of the inside of the high heat treater and naturally cooling the high heat treater so that the internal temperature of the high heat treater reaches between 70 and 80 degrees Celsius; A bamboo ash discharge step of opening the door of the high heat treatment machine after natural cooling is completed and discharging dried and heat-treated bamboo ash; Manufactured including,
Dry bamboo wood manufactured by a dry bamboo wood manufacturing method using high heat treatment, characterized in that the outer surface has a brown color and a moisture content of 5% to 12%.