JP2002053867A - Method for producing wood vinegar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for efficiently producing wood vinegar separating by each use and capable of eliminating a purification step. SOLUTION: In the production of wood vinegar by the dry distillation of raw material, the dry distillation temperature is maintained within the range of 150-250 deg.C and the produced wood vinegar is obtained. As an alternative, the dry distillation is carried out at 150-250 deg.C, the produced wood vinegar is obtained, the dry distillation temperature is raised to 250-350 deg.C and the obtained crude wood vinegar is obtained. The other method comprises the dry distillation of the raw material at 150-250 deg.C in the dry distillation furnace, the obtaining of the wood vinegar, the transfer of the non-carbonized raw material to a latter- stage dry distillation furnace, the dry distillation of the non-carbonized material at 250-350 deg.C and the obtaining of the crude wood vinegar.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for producing pharmaceutical materials, food additives, industrial materials, dye materials, pesticide materials, deodorants, soils from wood, thinned wood, waste wood or plant resources such as bamboo and grass. The present invention relates to a method for efficiently producing a wood vinegar solution for a purpose such as for an improving agent.

[0002]

2. Description of the Related Art Conventionally, wood vinegar has been obtained by steaming raw materials of charcoal in a charcoal furnace and cooling water vapor and volatiles by-produced in the process of producing charcoal.

[0003] As a special device for industrially producing charcoal, there are continuous carbonization furnaces such as a rotary kiln furnace, a screw furnace, and a fluidized carbonization furnace, and a wood vinegar solution is obtained from water vapor and volatile matter generated from these furnaces. Can be.

Generally, wood vinegar generated from a charcoal furnace is
It is called crude wood vinegar and contains wood tar. Therefore, in order to use it as wood vinegar, it must be purified to remove wood tar.

[0005] As methods for removing wood tar, 1) a method in which wood vinegar is allowed to stand for several months to separate wood tar by weight;
2) Activated carbon is added to the wood vinegar solution to adsorb the tar content, and then the tar-adsorbed activated carbon is removed by filtration. 3) Wood tar is fractionated by distillation.

[0006] However, 1) weight separation requires a long time and cannot completely separate the tar component. 2) The activated carbon method has a possibility of removing even active components, and furthermore, disposal of used activated carbon. 3) The distillation separation method has a problem that the production cost is high.

In recent years, wood vinegar has been found to have various effective values, such as pharmaceutical raw materials, food additives, industrial raw materials, dye raw materials, agricultural chemical raw materials, deodorants and soil conditioners. Therefore, a technique for efficiently producing wood vinegar is desired.

[0008]

The wood vinegar is, for example,
When this is used as a pesticide raw material or a soil conditioner, it may be a little low in purification degree or may have an offensive odor. What does not do is desired.

The present invention focuses on the fact that the properties of wood vinegar recovered are different due to the difference in carbonization temperature. By collecting wood vinegar for each application, wasteful purification steps are omitted, and wood vinegar is efficiently used. An object of the present invention is to provide a method for producing the same.

[0010]

In the first method for producing wood vinegar according to the present invention, the wood vinegar is recovered by carbonizing the raw materials to produce wood vinegar at a dry distillation temperature of 150 ° C. to 250 ° C. A method characterized by the following.

[0011] In the second method for producing wood vinegar according to the present invention, the dry distillation of the raw materials is carried out at a temperature in the range of 150 ° C to 250 ° C to produce the wood vinegar.
Then, dry distillation is performed in the range of 250 ° C. to 350 ° C. to recover the crude wood vinegar solution.

In the third method for producing wood vinegar according to the present invention, in producing wood vinegar by carbonizing raw materials, the wood vinegar is recovered by performing carbonization in a former stage carbonization furnace at a temperature of 150 ° C. to 250 ° C. Then, the uncarbonized raw material is sent to the subsequent carbonization furnace,
The method is characterized in that dry distillation is performed in the range of 250 ° C. to 350 ° C. to recover the crude wood vinegar solution.

The wood vinegar recovered by the method of the present invention does not contain harmful substances, wood tar, malodorous substances, etc., and does not require purification.

The raw material of charcoal may be wood and thinned wood, waste wood or bamboo, grass and the like.

Heating for carbonization may be performed by an external heating method using an electric heater or a combustion burner provided in the carbonization furnace, or by a direct heating method in which superheated steam or hot air is blown into the furnace.

The residence time in the first distillation furnace is preferably 30.
Min to 1 hour, and the residence time in the latter carbonization furnace is preferably 1 to 2 hours.

The pre-stage and post-stage carbonization furnaces are preferably equipped with a transport mechanism, such as a rotary kiln furnace or a screw furnace, for feeding raw materials from the front end of the furnace to an uncarbonized raw material discharge port below the furnace rear end.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described based on embodiments.

Example 1 An example will be described using the experimental apparatus of FIG.

First, a cedar chip sample is placed in an electric heating furnace (5). The inside of the electric heating furnace (5) is evacuated by the vacuum pump (3), and the flow meter is then introduced into the furnace from a nitrogen cylinder (1).
Nitrogen is introduced through (2), and the furnace is kept under a low oxygen concentration atmosphere.

An electric heater provided in an electric heating furnace (5)
Set the temperature of (4) to 200 ° C and start heating the furnace.
The generated water vapor and volatiles exit the furnace into a water-cooled cooling pipe (6) where they are condensed. This condensate is collected in a collection bottle (7) as wood vinegar and weighed by a weighing scale (8). Heat for about 1 hour until no wood vinegar appears.

Next, the temperature of the electric heater (4) is set to 300 ° C., and the sample is heated for about one hour until the wood vinegar does not come out.

The difference in the properties of wood vinegar due to the difference in heating temperature was examined. Table 1 shows the results. The color, odor and pH differed significantly at heating temperatures around 300 ° C. Heating temperature 20
The wood vinegar collected at 0 ° C did not contain any wood tar,
It was transparent without purification and had a good woody aroma.

[0024]

[Table 1]

Next, the difference in the composition of wood vinegar due to the difference in the heating temperature was examined. Table 2 shows the results. In view of the water content and the concentration of organic acids, wood vinegar produced at 200 ° C.
The wood vinegar prepared at 00 ° C. also sufficiently meets the quality standards for wood vinegar.

[0026]

[Table 2]

Embodiment 2 In FIG. 2, in this embodiment, the carbonization furnace is divided into two in order to continuously produce wood vinegar solutions having different recovery temperatures.

Raw materials such as wood and thinned wood, waste wood or bamboo grass are supplied to the former carbonization furnace (12) from the raw material supply port (11). The raw material is carbonized in a temperature range of 150 to 250 ° C by an electric heater external to the carbonization furnace (12), and uncarbonized on the lower side of the rear end of the furnace by the screw inside the carbonization furnace (12). It is transported to the residue discharge port (14).
The water vapor and volatiles generated during the carbonization of the raw materials are exhausted from the upstream exhaust port (13) at the rear end of the furnace. By cooling this, a high-quality wood vinegar liquid that does not require purification can be obtained.

The uncarbonized residue is discharged from the discharge port (14) and supplied to the latter-stage dry distillation furnace (16) via a rotary valve (15) having an air leakage prevention function. The uncarbonized residue is heated to 250 ° C. to 35 ° C. by an electric heater externally provided in the dry distillation furnace (16).
While being carbonized in a temperature range of 0 ° C., the screw at the lower end of the rear end of the furnace (16) was used to remove the rear outlet (1).
It is transported to 7). The steam and volatiles generated during the second stage carbonization are discharged from the second stage exhaust port (18) at the rear end of the furnace. The gas does not flow back to the carbonization furnace (12) by the rotary valve (15) having an air leakage prevention function. By cooling this gas mixture, a crude wood vinegar solution is obtained.

[0030]

According to the method of the present invention, the carbonization temperature is set to 150.
C. to 250.degree. C., it is possible to collect a fragrant wood vinegar solution which does not contain impurities such as wood tar and does not require purification, and is suitable for pharmaceutical raw materials, food additives, deodorants, etc. Can be obtained.

The crude wood vinegar solution can be recovered by subjecting the remaining raw materials from which the wood vinegar solution has been recovered by the above operation to dry distillation at a temperature in the range of 150 ° C. to 250 ° C. Wood vinegar suitable for raw materials, deodorants and soil conditioners can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of an experimental apparatus used in Example 1.

FIG. 2 is a schematic diagram of a wood vinegar production apparatus used in Example 2.

[Explanation of symbols]

 (1): Nitrogen cylinder (2): Flow meter (3): Vacuum pump (4): Electric heater (5): Electric heating furnace (6): Water-cooled cooling pipe (7): Recovery bottle (8): Weight Total (11): Raw material supply port (12): Pre-stage carbonization furnace (13): Pre-stage smoke discharge port (14): Uncarbonized residue discharge port (15): Rotary valve with air leak prevention function (16): Post-stage carbonization furnace (17): Rear exhaust port (18): Rear exhaust port

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hironori Kishida 1-7-89 Minami Kohoku, Suminoe-ku, Osaka-shi Inside Tachibana Zosen Corporation (72) Inventor Takanobu Yamamoto 1-7 Minami-Kohoku, Suminoe-ku, Osaka-shi No. 89 F-term in Tachibashi Shipbuilding Co., Ltd. (reference) 4H012 JA01 JA03 JA04 JA13 4H015 AA01 AA13 AB01 BA12 BB03 CB01

Claims (3)

[Claims] 1. A method for producing wood vinegar and charcoal, wherein, in producing wood vinegar by carbonizing raw materials, the carbonization temperature is set in the range of 150 ° C. to 250 ° C., and the wood vinegar is recovered. 2. A method for producing wood vinegar by carbonizing raw materials, wherein carbonization is performed at a temperature in the range of 150 ° C. to 250 ° C.
A method for producing wood vinegar and charcoal, comprising collecting wood vinegar and then performing dry distillation at a temperature in the range of 250 ° C. to 350 ° C. to collect crude wood vinegar. 3. A process for producing a wood vinegar solution by dry-distilling the raw material, wherein the wood distillation is performed in a first stage distillation furnace at a temperature in the range of 150 ° C. to 250 ° C. to recover the wood vinegar solution. The method for producing wood vinegar and charcoal, wherein the crude wood vinegar is recovered by carrying out dry distillation in the range of 250 ° C. to 350 ° C.