JP2006299186A - Process for producing bamboo vinegar - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a process for producing bamboo vinegar that is capable of quickly and efficiently separating bamboo vinegar, more specifically, capable of separating bamboo vinegar by causing pieces of bamboo to explode into smaller fragments in such an efficient manner that the bamboo vinegar contained in the bamboo is instantly vaporized into steam and can be discharged to the atmosphere and hence the bamboo vinegar entrapped in spaces between high-density bamboo fibers can smoothly be discharged to the atmosphere. <P>SOLUTION: The process for producing bamboo vinegar comprises introducing pieces of bamboo 20 into a pressurized/heated tank 1, closing the pressurized/heated tank 1 and supplying heated and pressurized steam to the inside of the tank to pressurize the tank above atmospheric pressure and heat the tank to a temperature above 100°C so that the bamboo 20 is heated under pressurized conditions, and thereafter opening the pressurized/heated tank 1 to the atmosphere to abruptly reduce the pressure to atmospheric pressure and cause the bamboo to explode into smaller fragments to thereby separate bamboo vinegar from the piece of bamboo 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for producing bamboo vinegar used mainly for insecticides and antibacterial agents.

A method for producing bamboo vinegar has been developed (see Patent Document 1).
Patent Document 1 describes a method of extracting bamboo vinegar by distilling bamboo leaves or roots with steam at high temperature (preferably 120 ° C. to 380 ° C.) and high pressure (preferably 0.1 MPa to 1.0 MPa). The Bamboo vinegar produced by this method has essential oil components and has a good fragrance, and has a feature that the content of environmental pollutants such as tar and benzpyrene can be reduced.

However, this method has a drawback that the bamboo vinegar cannot be separated efficiently. This is because the bamboo vinegar contained in the high-density bamboo fibers cannot be discharged smoothly. Regardless of this method, a method of carbonizing bamboo to separate bamboo vinegar has been developed. In this method, for example, as described in Patent Document 2, bamboo is heated to 300 to 330 ° C. with combustion gas to separate bamboo vinegar. In this method, the bamboo is heated and burned with combustion gas, so that it is extremely difficult to accurately control the heating temperature of the bamboo, and the content of tar components and the like is increased. This is because, as described in Patent Document 3, when the heating temperature of the bamboo is slightly increased to 330 to 350 ° C., the tar component contained in the bamboo vinegar increases.
JP 2005-015722 A JP 7-34070 A

  The present invention has been developed for the purpose of solving the above drawbacks in the conventional methods. An important object of the present invention is to provide a method for producing a bamboo vinegar solution that can quickly and efficiently separate the bamboo vinegar solution.

  The manufacturing method of the bamboo vinegar of the present invention has the following configuration in order to achieve the above-mentioned object. Bamboo vinegar is produced by putting bamboo 20 in a pressurized heating tank 1, sealing the pressurized heating tank 1 and supplying pressurized steam heated inside to pressurize to atmospheric pressure or higher, and 100 ° C. or higher. Then, the bamboo 20 is heated in a pressurized state, and then the pressurized heating tank 1 is opened to the outside and exploded to atmospheric pressure to separate the bamboo vinegar from the bamboo 20.

  In the method for producing a bamboo vinegar according to the present invention, preferably, the bamboo 20 is vertically divided and placed in the pressurized heating tank 1 for explosion.

  The manufacturing method of the bamboo vinegar liquid of this invention can heat the pressurized heating tank 1 to 100 to 250 degreeC with pressurized steam.

  The method for producing bamboo vinegar according to the present invention can separate the bamboo vinegar from bamboo 20 by repeating the explosion that opens the pressurized heating tank 1 from the heating and pressurization to the atmosphere a plurality of times.

  The method for producing a bamboo vinegar according to the present invention has a feature that a bamboo vinegar can be separated quickly and efficiently. That is, the method for producing bamboo vinegar according to the present invention supplies heated steam to a pressurized heating tank containing bamboo, pressurizes it to atmospheric pressure or higher, and heats it to 100 ° C or higher to pressurize bamboo. It is because it heats in a state and then opens the pressurized heating tank to the outside and blasts to atmospheric pressure to separate the bamboo vinegar from bamboo. In this manufacturing method, the pressure of a pressurized heating tank pressurized in a heated state is instantaneously reduced to atmospheric pressure, the bamboo is crushed, the bamboo vinegar contained in the bamboo is boiled and vaporized, and the gap between the bamboo fibers Is permeated and released to the outside. In particular, the water vapor which has been vaporized and expanded in volume forcibly pushes the gaps between the bamboo fibers, so that the bamboo vinegar can be quickly released to the outside. That is, by blasting bamboo, bamboo vinegar contained therein can be instantly vaporized and released to the outside. Therefore, the manufacturing method of this invention can discharge | emit the bamboo vinegar contained in the inside of a high-density bamboo fiber smoothly outside, and can isolate | separate a bamboo vinegar efficiently.

  Embodiments of the present invention will be described below with reference to the drawings. However, the examples shown below exemplify the method for producing bamboo vinegar for embodying the technical idea of the present invention, and the present invention describes the method for producing bamboo vinegar as follows. Is not specified.

  Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

  The method for producing bamboo vinegar according to the present invention uses bamboo as a raw material, but does not heat-bamboo with a combustion gas and dry distillation. In the method of the present invention, bamboo vinegar is separated by blasting bamboo. The raw material bamboo is cut into a length of 3 m, for example, and is divided into a width of about 5 cm. However, the bamboo as a raw material can be used by cutting the length into a length of 10 cm to 7 m and further dividing it into a width of 1 cm to 10 cm.

  Although the present invention is a method for producing a bamboo vinegar solution, an explosion-treated bamboo separated from the bamboo vinegar solution can also be used effectively. Since the crushed bamboo is separated into fibers, the bamboo is separated into fibers and used for various purposes. For example, the obtained bamboo fibers can be assembled three-dimensionally with no directivity, and the bamboo fibers can be joined at intersections to form a sheet having a predetermined thickness, which can be used for wallpaper, filters, and the like. In addition, the crushed bamboo fiber can be separated into finer fibers and processed into cotton.

  Bamboo vinegar is separated from the raw material bamboo using the blasting apparatus shown in FIG. The blasting apparatus in this figure includes a pressurized heating tank 1, a boiler 2 that supplies pressurized steam heated to the pressurized heating tank 1, and a pressurized water that is connected between the boiler 2 and the pressurized heating tank 1. The adjusting valve 3 for adjusting the supply amount of steam and the internal temperature of the pressurized heating tank 1 are detected by the temperature sensor 5, the opening degree of the adjusting valve 3 is controlled, the pressurized steam amount is adjusted, and the pressurized heating tank A controller 4 for setting the internal temperature of 1 to a set temperature, an air release valve 6 that opens the pressurized heating tank 1 to the outside and blasts it to atmospheric pressure, and bamboo vinegar from the steam discharged from the air release valve 6 And a recovery device 7 for recovering the product.

  The pressurized heating tank 1 is a cylindrical pressure tank whose one end is closed and the other end is opened, and whose open end is airtightly closed with a pressure lid 1A. The pressurized heating tank 1 opens and closes the pressure lid 1 </ b> A, and takes in and out the bamboo 20 put in the container 15. When the bamboo 20 is pressurized and heated, the pressure lid 1A seals the pressurized heating tank 1.

  The boiler 2 supplies pressurized high-temperature steam obtained by heating water to the pressurized heating tank 1 and raises the temperature and pressure in the pressurized heating tank 1 so that the bamboo 20 is pressurized. Heat.

  The regulating valve 3 controls the amount of pressurized water vapor supplied from the boiler 2 to the pressurized heating tank 1. When the regulating valve 3 is opened, pressurized steam is supplied from the boiler 2 to the pressurized heating tank 1. The opening and closing and the opening degree of the regulating valve 3 are controlled by the controller 4, and the temperature in the pressurized heating tank 1 is maintained at the set temperature.

  The controller 4 controls the regulating valve 3 by detecting the temperature in the pressurized heating tank 1 with the temperature sensor 5. When the temperature in the pressurized heating tank 1 detected by the temperature sensor 5 becomes lower than the set temperature, the controller 4 opens the regulating valve 3 or increases the opening of the regulating valve 3 to increase the pressure from the boiler 2. Pressurized steam is supplied to the heating tank 1 to raise the temperature in the pressurized heating tank 1. When the temperature in the pressurized heating tank 1 becomes higher than the set temperature, the regulating valve 3 is closed or the opening degree is reduced, and the pressurized steam supplied from the boiler 2 to the pressurized heating tank 1 is stopped, or The supply amount is reduced to lower the temperature in the pressurized heating tank 1.

  The air release valve 6 opens the pressurized heating tank 1 to the atmosphere, and instantaneously lowers the pressure of the pressurized heating tank pressurized in the heated state to atmospheric pressure to blast the bamboo 20. When the bamboo 20 is exploded, the boiling point of water instantaneously decreases, and the bamboo vinegar liquid contained in the bamboo 20 boils instantaneously. The volume of the bamboo vinegar liquid that has boiled to become water vapor increases rapidly, and passes through the gaps between the bamboo fibers and is released to the outside. At this time, the water vapor which has been vaporized and expanded in volume makes it easy to separate the fibers by forcing the gaps between the bamboo fibers to open. Bamboo vinegar liquid that has become a water vapor when the gaps between the bamboo fibers are pushed open is quickly transmitted between the bamboo fibers and released to the outside. For this reason, the bamboo vinegar liquid which is exploded and contained inside is smoothly and efficiently discharged to the outside. That is, when the bamboo 20 is crushed, the bamboo vinegar contained therein is instantly vaporized and released to the outside as water vapor. By repeating the explosion of the bamboo 20 many times, the gap between the bamboo fibers is further expanded. For this reason, the bamboo vinegar liquid contained in the inside of the bamboo 20 can be quickly released to the outside through the gap between the bamboo fibers. The explosion of the bamboo 20 is repeated, for example, 2 to 10 times, preferably 3 to 8 times, more preferably 4 to 8 times, and the bamboo vinegar solution is efficiently discharged to the outside.

  Steam bamboo vinegar liquid discharged to the outside by blasting is recovered by the recovery device 7. The collector 7 condenses the water vapor discharged from the pressurized heating tank 1 and separates the bamboo vinegar liquid. A recovery device 7 shown in FIG. 1 fixes a porous cylinder 9 having a large number of through holes 10 in a casing 8 having a closed structure, and a fiber material 11 such as glass fiber is interposed between the porous cylinder 9 and the casing 8. Filled. The recovery unit 7 connects the porous cylinder 9 to the pressurized heating tank 1. The steam supplied to the porous cylinder 9 passes through the through hole 10 of the porous cylinder 9, passes through the gap between the fiber materials 11, and is discharged to the outside of the casing 8. The vapor supplied to the recovery device 7 collides with the porous tube 9, further collides with the fiber material 11, condenses and liquefies, and becomes bamboo vinegar and flows down to the bottom. In order to discharge the bamboo vinegar flowing down to the bottom, a discharge port 12 is opened at the bottom of the casing 8, and a discharge pipe 13 is connected to the discharge port 12. Furthermore, the bottom of the casing 8 is inclined downward toward the discharge port 12 so that the bamboo vinegar is smoothly discharged from the discharge port 12.

  The discharge pipe 13 is connected to a discharge valve 14 on the way, and the bamboo vinegar is discharged from the discharge pipe 13 by opening the discharge valve 14 or adjusting the opening of the discharge valve 14.

  The bamboo 20 is processed into a predetermined size and then carried into the pressurized heating tank 1 of the apparatus shown in FIG. The bamboo 20 is processed into a predetermined width by cutting the bamboo 20 into a predetermined length. The bamboo 20 processed into a predetermined size is put into a container 15 with a predetermined amount and is carried into the pressurized heating tank 1. After putting the bamboo 20, the pressurized heating tank 1 is sealed by closing the pressure lid 1A.

  The pressurized heating tank 1 filled with the bamboo 20 and sealed is supplied with pressurized steam from the boiler 2 and heated to a set temperature. At this time, the controller 4 controls the opening and closing and the opening degree of the regulating valve 3 to control the amount of pressurized water vapor supplied to the pressurized heating tank 1, and the temperature and pressure in the pressurized heating tank 1 are set to the set values. To do.

  The set temperature in the pressurized heating tank 1 is maintained at, for example, 100 ° C. to 250 ° C., preferably 110 ° C. to 190 ° C., and more preferably 120 to 170 ° C. If the set temperature of the pressurized heating tank is lower than 100 ° C., the pressure in the pressurized heating tank cannot be increased above the atmospheric pressure, and therefore it cannot be blasted even if the atmosphere release valve is opened. Moreover, when setting temperature is too high, while bamboo carbonizes, the tar component of a bamboo vinegar liquid will increase. Since the pressurized heating tank 1 is maintained at a set temperature with pressurized steam, the internal pressure increases as the set temperature is increased.

  In order to separate a bamboo vinegar solution having a high content of furfural, the set temperature of the pressurized heating tank 1 is set to 140 ° C to 190 ° C. The set temperature and pressure in the pressurized heating tank 1 affect the furfural concentration of the bamboo vinegar. This is because even if the set temperature is higher than 190 ° C. or lower than 140 ° C., the furfural concentration of the bamboo vinegar is lowered. The furfural concentration of the bamboo vinegar can be set to 70% by weight or more when the temperature in the pressurized heating tank 1 is 140 to 190 ° C. Furthermore, the temperature in the pressurized heating tank 1 can be set to 160 to 190 ° C., the furfural concentration of the bamboo vinegar can be set to 80% by weight or more, and the temperature in the pressurized heating tank 1 can be set to 170 ° C. The furfural concentration can be as high as 90% by weight. The furfural concentration means the content of furfural contained in a component obtained by removing water from bamboo vinegar.

  The pressure in the pressurized heating tank 1 increases as the temperature increases. The pressure in the pressurized heating tank that sets the set temperature to 160 to 170 ° C. is 4 to 5 atm. When the set temperature is maintained at 170 to 190 ° C., the pressure is 5 to 9 atm.

  The time for maintaining the pressurized heating tank 1 at the set temperature is 1 minute to 30 minutes, preferably 2 minutes to 20 minutes, more preferably 3 minutes to 10 minutes, and most preferably 5 to 8 minutes. If the time for maintaining the set temperature is too short, the bamboo cannot be heated sufficiently to the inside, and the bamboo vinegar solution cannot be separated effectively even if it is crushed. On the contrary, if the heating time is long, it takes time for one explosion, and the bamboo vinegar cannot be efficiently separated from a large amount of bamboo in a short time.

[Raw material processing process]
In this process, the bamboo sword bamboo is cut to a length of 3 m, and this bamboo is further divided into 5 cm widths.

[Blasting process]
100 kg of bamboo is carried into the shelf 16 of the pressurized heating tank 1. After the pressure lid 1A of the pressurized heating tank 1 is airtightly closed, the temperature in the pressurized heating tank 1 is set to 137 ° C., heated and pressurized for 6 minutes at the set time, and then the atmosphere release valve 6 is opened and exploded. To do. This explosion process is repeated 6 times. In the explosion process, the opening degree of the discharge valve 14 connected to the recovery device 7 is adjusted, and the bamboo vinegar is discharged from the bottom of the recovery device 7. About 20 liters of bamboo vinegar is obtained by this method.

  In the blasting step, when the bamboo vinegar solution is separated from the bamboo vines in the same manner as in Example 1 except that the temperature in the pressurized heating tank 1 is 145 ° C., about 24 liters of bamboo vinegar solution is obtained.

  In the blasting step, when the bamboo vinegar solution is separated from the bamboo scorpion bamboo in the same manner as in Example 1 except that the number of explosions is set to four times, about 16 liters of bamboo vinegar solution is obtained.

It is a schematic block diagram of the blasting apparatus used for the manufacturing method of the bamboo vinegar liquid concerning one Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Pressurization heating tank 1A ... Pressure lid 2 ... Boiler 3 ... Adjustment valve 4 ... Controller 5 ... Temperature sensor 6 ... Atmospheric release valve 7 ... Collecting device 8 ... Casing 9 ... Porous cylinder 10 ... Through-hole 11 ... Textile material 12 ... Discharge port 13 ... Discharge pipe 14 ... Discharge valve 15 ... Vessel 16 ... Shelf 20 ... Bamboo

Claims (4)

  Bamboo (20) is placed in the pressurized heating tank (1), the pressurized heating tank (1) is sealed and pressurized water vapor is supplied to the inside to increase the pressure to atmospheric pressure or higher and to 100 ° C or higher. Bamboo vinegar that separates the bamboo vinegar from the bamboo (20) by heating the bamboo (20) in a pressurized state, then opening the pressurized heating tank (1) to the outside and blasting it to atmospheric pressure Manufacturing method.   The method for producing bamboo vinegar according to claim 1, wherein the bamboo (20) is divided vertically and placed in a pressurized heating tank (1) for explosion.   The method for producing bamboo vinegar according to claim 1, wherein the pressurized heating tank (1) is heated to 100 to 250 ° C with pressurized steam. The method for producing bamboo vinegar according to claim 1, wherein the bamboo vinegar is separated from the bamboo (20) by repeating the blasting for releasing the pressurized heating tank (1) from the heated pressure to the atmosphere a plurality of times.

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