JPH0681284A - Method for treating woody material such as chip - Google Patents

Abstract

PURPOSE:To eliminate a low yield of a component constituting pulp. CONSTITUTION:A solvent solution of a chlorine-based vapor defatting and washing organic solvent is heated, boiled and vaporized in operation to treat a woody material and the resultant gas of the chlorine-based vapor defatting and washing organic solvent is permeated into the woody material to melt fats and oils therein. Thereby, holes are bored in the cell membrane of the woody material. Water is further added to a solvent solution (B) of the chlorine- based vapor defatting and washing organic solvent and the obtained mixture is heated to about 100-130 deg.C to permeate the vapor of the chlorine-based vapor defatting and washing organic solvent and steam into the woody material to melt the fats and oils in the woody material. Thereby, holes are bored in the cell membrane of the woody material. Furthermore, the woody material and the chlorine-based vapor defatting and washing organic solvent (B) are hermetically sealed in a pressure container (A) to repeatedly carry out the heating and pressurizing and cooling and decompressing. As a result, the melting of the fat and oil components in the woody material is accelerated with the chlorine-based vapor defatting and washing organic solvent (B).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for degreasing wood materials such as chips, which are raw materials for the pulp industry.

[0002]

2. Description of the Related Art Conventionally, wood materials such as chips, which are raw materials for the pulp industry, have to be separated into resin and fat components such as non-cellulose and lignin which are contained in the wood materials in order to form fibers. . Conventionally, in the pulp industry, put chips or the like of wood material in a kettle, by boiling with sodium sulfite or caustic soda, etc., composed of cellulose, non-cellulose, lignin, etc., completely separate the cells of the chips, Non-cellulose, lignin, etc. were separated from it, and the fiber portion constituting the pulp was taken out. However, in the process of cell destruction by boiling with sodium sulfite or caustic soda, and the step of separating non-cellulose and lignin components, most of the cellulose components that can make up the pulp are mixed with the fats and oils components and discarded. There was.

[0003]

DISCLOSURE OF THE INVENTION The present invention solves the poor yield of the components that make up the pulp in this way, and does not completely destroy the cells of the chip, and several dozen cells per cell To hundreds of pits, which are wall holes equipped with a valve mechanism, are replaced with methylene chloride (CH ₂ Cl ₂ ) which is a chlorine-based vapor degreasing cleaning organic solvent
Dissolve with a solvent liquid etc. and open it, and extract tar and fat components such as internal non-cellulose and lignin from the portion,
Only the pulp component such as the cell membrane remaining after that is dissolved with sodium sulfite or caustic soda to obtain the pulp in a good yield.

[0004]

The problems to be solved by the present invention are as described above. Next, the means for solving the problems will be described. That is, in the wood material processing work, the solvent solution of the chlorine-based vapor degreasing cleaning organic solvent is heated and boiled to vaporize, the gas of the chlorine-based vapor degreasing cleaning organic solvent is permeated into the wood material, and the oil and fat in the wood material is The material is melted to open perforations in the wood material cell membrane.

Further, in the wood material processing operation, water is added to the solvent solution of the chlorine-based vapor degreasing / cleaning organic solvent and heated to about 100 to 130 ° C. to vaporize the chlorine-based vapor degreasing / cleaning organic solvent. The water vapor is permeated into the wood material to melt the oil and fat in the wood material, and perforations are opened in the wood material cell membrane.

Further, the wood material and the chlorine-based vapor degreasing and cleaning organic solvent are sealed in a pressure vessel, and heating and pressurization and cooling and depressurization are repeated, and the oil and fat components in the wood material by the chlorine-based vapor degreasing and cleaning organic solvent are repeatedly applied. It promotes the melting of the.

Further, in the processing operation of the wood material, the methylene chloride solvent liquid is heated and boiled to be vaporized, and the gas of the methylene chloride solvent is permeated into the wood material to melt the oil and fat in the wood material, and the wood material cell membrane. The perforation is to be opened.

Further, in the wood material processing operation, water is added to the methylene chloride solvent solution and heated to about 100 to 130 degrees Celsius to allow the vapor and steam of the methylene chloride solvent to penetrate into the wood material, It melts the oil and fat in it and opens perforations in the wood material cell membrane.

Further, the wood material and the methylene chloride solvent are hermetically sealed in a pressure vessel, and heating and pressurization and cooling and depressurization are repeated to accelerate the melting of the oil and fat component in the wood material by the methylene chloride solvent.

[0010]

The function of the present invention will be described. As a chlorine-based vapor degreasing cleaning organic solvent, trichlorethylene (CHC
l = CCl ₂ ) or perchlorethylene or (CCl ₂ =
CCl ₂ ) and 1,1,1-trichloroethane (CH ₃
CCl ₃ ) and Freon 113 (CCl ₂ FCClF ₂ )
However, in this embodiment, a methylene chloride (CH ₂ Cl ₂ ) solvent liquid is mainly used. The methylene chloride solvent solution B is vaporized to produce a wood material for treatment 1
By infiltrating into the cell tissue, the strong lignin in the cell tissue is melted and perforated in the pit which is a wall hole equipped with a valve mechanism, and the valve action of the temporary conduit and the pit of the conduit is destroyed, and The non-cellulose or lignin trapped in the lumen is easily released from the perforation or the valve of the wall hole. By piercing the pit that is a wall hole equipped with a valve mechanism in this way and destroying the valve action of the pit, boiling decomposition with sodium sulfite or caustic soda is facilitated in the next step, and the yield of the cellulose component is improved. Of.

[0011]

The problems to be solved and the means for solving the present invention are as described above. Next, the specific structure of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front sectional view of a processing apparatus using the method for processing wood materials such as chips according to the present invention,
FIG. 2 is a plan view of the processing apparatus using the wood material processing method of the present invention with the upper lid removed, and FIG. 3 is a simplified view showing preparation of processing work in the processing apparatus using the wood material processing method of the present invention. Sectional drawing, FIG. 4 is a simplified cross-sectional view showing a processing operation in a processing apparatus using the wood material processing method of the present invention, and FIG. 5 is a processing apparatus using the wood material processing method of the present invention, when the processing operation is completed. A simplified cross-sectional view showing
FIG. 6 is a simplified cross-sectional view after the processing operation is completed in the processing apparatus that has implemented the method for processing a wood material according to the present invention.

1 and 2, the structure of a processing apparatus for carrying out the processing method of the present invention will be described. First, the wooden material processing pressure vessel A is made of stainless steel, and has a cylindrical main body 1
And a dome-shaped upper lid 2 provided above the dome-shaped upper lid 2. The dome-shaped upper lid 2 is provided in a plurality of bolt holes 1e, 1e ... , 3 ... are attached to the main body 1 by screwing, and the inside of the main body 1 is composed of three chambers of a solvent liquid tank 1a, a processing chamber 1b, and a cooling chamber 1c. Is there.

First, as shown in FIGS. 1 and 2, the solvent liquid tank 1a is arranged under the floor of the main body 1, and the solvent liquid tank 1a contains methylene which is a chlorine-based vapor degreasing cleaning organic solvent. The chloride solvent solution B is full. Other organic solvents used for cleaning steam degreasing include trichlorethylene (CHC).
l = CCl ₂ ) or perchlorethylene or (CCl ₂ =
CCl ₂ ) and 1,1,1, -trichloroethane (CH
₃ CCl ₃ ) and Freon 113 (CCl ₂ FCCl
F ₂ ), etc., but in this embodiment, the methylene chloride (CH ₂ Cl ₂ ) solvent liquid B is used. A heat source pipe 4 for heating and boiling the methylene chloride solvent solution B is provided to uniformly warm the entire inside of the tank from the outside of the tank, and the water separator 5 is distilled and recovered in the other cooling chamber 1c.
The methylene chloride solvent solution B purified in Step 1 is used as a solvent solution tank 1a.
The solvent liquid return pipe 6 for returning to the inside and the solvent liquid extraction pipe 8 for extracting the methylene chloride solvent liquid B in the solvent liquid tank 1a after the completion of the first half processing work and storing them in the solvent liquid tank 7 are respectively It is connected to the liquid tank 1a.

Next, the solvent liquid tank 1a and the processing chamber 1b are partitioned by a floor 9 of a slatted table. Inside the processing chamber 1b, the solvent liquid tank 1a is heated and boiled at a low temperature of about 40 degrees Celsius. The vapor of the methylene chloride solvent liquid B is accumulated to form the solvent vapor layer C of methylene chloride, and the wood material transporting container 11 containing the wood material 10 for processing is processed during the processing operation. It is placed on the floor 9 of the snowboard in the chamber 1b. Since the methylene chloride (CH ₂ Cl ₂ ) solvent liquid B boils at about 40 degrees Celsius, it can be easily vaporized, and this vapor exerts the effect of degreasing the oil and fat component of the woody material.

The cooling chamber 1c, which is provided above the processing chamber 1b and separates the air / vapor boundary surface D, is for distilling and collecting the excess solvent vapor rising from the processing chamber 1b. The room temperature of the cooling chamber 1c is always set lower than the boiling point of 40 ° C. of the methylene chloride solvent liquid B by the cooling water of the cooling pipe 12, and the vapor of the methylene chloride solvent liquid B rising from the processing chamber 1b is condensed. Accumulated in the condensate / water receiving trough 13 through the condensate pipe 14,
It is configured to be sent to a water separator 5 provided on the side of the main body 1 to be purified and then returned to the solvent liquid tank 1a.

The wood material processing operation of the present invention will be described with reference to FIGS. First, as shown in FIG. 3, a wooden material transport container in which the wooden material 10 for processing is contained by the crane 16 on the floor 9 of the slatted table inside the main body 1 with the upper lid 2 of the wooden material processing pressure container A opened. 11 is carried in and placed.

Next, as shown in FIG. 4, the upper lid 2 is screwed into the main body 1 with the sealing bolts 3, 3 ..., The inside of the wood material processing pressure vessel A is hermetically sealed, and the heat source pipe 4 is closed. When the power is turned on, the heat source is transmitted to the entire heat source pipe, and thereby the methylene chloride solvent liquid B in the solvent liquid tank 1a is heated and boiled to form the solvent vapor layer C in the processing chamber 1b. The solvent vapor permeates into the treating wood material 10 of the wood material transporting container 11 left in the solvent vapor layer C, the free water that is not trapped is gradually expelled, and the cells of the wood material are formed. The lignin that solidifies the solid cellulose and non-cellulose is melted. This work is continued for several hours, then the power source of the heat source pipe 4 is turned off, and the methylene chloride solvent liquid B in the solvent liquid tank 1a is not necessary for the latter half of the processing work, so all the solvent liquid is used. It can be transferred to tank 7.

By the above treatment, the unconfined free water contained in the treatment wood material 10 is expelled,
The processing work of melting the fats and oils component is performed, and the fats and oils part of the wood-based material are methylene chloride (CH ₂ C
l ₂ ) It comes out after being dissolved in the solvent liquid B. When this degreasing treatment is completed, the oil and fat portion of the wood-based material is melted out, the cells are perforated, and the valve portion of the wall hole is destroyed. Next, as shown in FIG. 5, the work of reducing the water content to a certain amount is performed.

In the drying operation, the solvent vapor that has permeated the interior of the processing wood material 10 is expelled, and the free water that has been confined is expelled from the cells that have perforated due to the melting of oils and fats, and the temporary lumens and conduits. Of. Therefore, the hot air blower pipe 15 provided on the dome-shaped upper lid 2 is opened and the hot air is blown into the wooden material processing pressure vessel A. Due to the hot air, the solvent vapor and water that have permeated the interior of the processing wood material 10 evaporate, and the water of cell water also evaporates. This operation can also be continuously performed for several hours to completely evaporate the solvent vapor of methylene chloride and the trapped free water from the inside of the processing wood material 10. When all the processing operations are completed, the dome-shaped upper lid 2 is opened again as shown in FIG. 6, and the wooden material transport container 11 is carried out from the wooden material processing pressure container A by the crane 16.

During the processing operation, as shown in FIG. 4, the solvent liquid tank 7 keeps the pressure in the solvent liquid tank 1a constant so that the solvent liquid tank 1a and the solvent liquid tank 7 have methylene chloride solvent liquid B surface. The solvent liquid tank 7 is lifted upward so that the height is the same, and when the treatment work in the first half is completed, the solvent liquid tank 7 is lowered to facilitate the recovery of the methylene chloride solvent liquid B in the solvent liquid tank 1a. Then, it is collected via the solvent liquid extracting pipe 8.

By the work of treating the wood material, degreasing is carried out with the methylene chloride solvent solution B, the strong lignin in the cell tissue is melted and perforated in the cell membrane, and the temporary conduit and the valve of the wall hole of the conduit are destroyed and confined. The free water contained therein is easily discharged from the perforation or the valve of the wall hole.

In the wood material processing pressure vessel A of the present invention, the safety valves 17 and 18 are provided in the upper lid 2 and the solvent liquid tank 1a, respectively.
If a pressure abnormality occurs inside the wooden material processing pressure vessel A during the processing operation, the pressure is reduced so that a constant pressure is always maintained. Further, in the present invention, the methylene chloride solvent liquid B and the treatment wood material 10 are hermetically disposed inside the wood material processing pressure vessel A, and the methylene chloride solvent is heated by the heat source pipe 4 or an external heat source. Liquid B
Is heated to about 6 kg / square centimeter, the supply of the heat source to the heat source pipe 4 is stopped after about 1 hour, and the methylene chloride solvent solution B is returned to the aqueous solution.
The pressure is reduced to about atmospheric pressure, and after 1 hour, heating and pressurization,
Further, by repeating the operation of cooling and depressurizing after 1 hour, the degreasing treatment by the vapor of the methylene chloride solvent solution B can be further promoted.

When only the methylene chloride solvent liquid B is placed in the solvent liquid tank 1a in the woody material processing pressure vessel A and heated and evaporated, it can be vaporized at about 40 degrees Celsius. Since the surface of the treating wood material 10 is hardened at the beginning of the treatment of the wood material, the vapor of the methylene chloride solvent solution B hardly permeates into the cells, and therefore the methylene chloride is added to the solvent tank 1a. About 50% of water is mixed with the chloride solvent solution B and heated to 100 to 130 degrees to obtain water and methylene chloride solvent solution B.
It is effective to explosively vaporize and process.

By mixing the water vapor and the vapor of the methylene chloride solvent liquid B and allowing the water to penetrate into the treatment wood material 10, the cells on the surface of the treatment wood material 10 are opened by the water vapor, and from this portion, the methylene chloride solvent is opened. The vapor of the liquid B is permeated to exert the effect of promoting the degreasing treatment.

Further, methylene chloride (CH ₂ C
l ₂ ) When the degreasing work of the wood-based material is completed with the solvent liquid B and water, the methylene chloride (CH ₂ Cl ₂ ) solvent liquid B and the water are returned to liquid, but in addition, the oil and fat components of the wood-based material , Stay in the solution in a separated state. A natural resin raw material can be obtained by physically separating the oil and fat components of the wood material.

[0026]

Since the present invention is configured as described above, it has the following effects. First, methylene chloride (CH ₂ C), which is a chlorine-based vapor degreasing cleaning organic solvent.
l ₂ ) The vapor of the solvent liquid B acts on the fat and oil components of the wood material to degrease and melt them, thereby opening holes in a part of the wood material cells containing cell water, The valve in the wall hole is destroyed, and trapped free water, which was difficult to obtain in the past, can easily escape from this portion. Therefore, the processing time of the wood material is drastically shortened as compared with the conventional one, and a large amount of the wood material can be processed, and the time and energy can be greatly saved.

Secondly, as compared with the conventional method, by boiling with sodium sulfite or caustic soda, wood materials such as chips, which are raw materials in the pulp industry, were decomposed and non-cellulose and lignin were separated. First of all, the cells of the wood material are left as they are, a hole is made in the pit that is a wall hole equipped with a valve mechanism, and non-cellulose and lignin are taken out from that part, so the cellulose component that constitutes pulp is boiled and discarded together with lignin. Therefore, the yield of pulp production was improved.

Thirdly, the methylene chloride solvent solution, which is a chlorine-based vapor degreasing and cleaning organic solvent used for significantly shortening the treatment time, is a highly safe chlorine-based solvent that does not damage wood materials, and Since the boiling point is as low as 40 degrees, it is very convenient because time and energy can be saved even when sending hot air as the finishing of the processing work into the interior of the wood material processing apparatus or when collecting by distillation.

[Brief description of drawings]

FIG. 1 is a front cross-sectional view of a processing apparatus that uses a method for processing wood materials such as chips according to the present invention.

FIG. 2 is a plan view of the processing apparatus using the method for processing a wood material according to the present invention, with the upper lid removed.

FIG. 3 is a simplified cross-sectional view showing preparation of a processing operation in a processing apparatus using the method for processing a wood material according to the present invention.

FIG. 4 is a schematic cross-sectional view showing a processing operation in a processing apparatus using the method for processing a wood material according to the present invention.

FIG. 5 is a simplified cross-sectional view showing the completion of processing work in the processing apparatus using the method for processing a wood material according to the present invention.

FIG. 6 is a schematic cross-sectional view after a processing operation is completed in a processing apparatus that carries out the method for processing a wood material according to the present invention.

[Explanation of symbols]

 A Wood processing pressure vessel for chips, etc. B Methylene chloride solvent liquid C Solvent vapor layer D Air / vapor interface 1 Main body 1a Solvent liquid tank 1b Treatment chamber 1c Cooling chamber 2 Top lid 4 Heat source pipe 9 Snooker floor 10 Treatment wood Material 15 Hot air blower tube

Claims (6)

[Claims] 1. In a wood material processing operation, a solvent solution of a chlorine-based vapor degreasing cleaning organic solvent is heated and boiled to be vaporized,
A method for treating a wood material such as chips, characterized in that the gas of the chlorine-based vapor degreasing / cleaning organic solvent is infiltrated into the wood material to melt the oil / fat in the wood material to open perforations in the wood material cell membrane. 2. In a wood material processing operation, water is added to a solvent solution of a chlorine-based vapor degreasing cleaning organic solvent to obtain a temperature of 10 degrees Celsius.
It is characterized by heating to 0 to 130 degrees, permeating chlorine-based vapor degreasing organic solvent vapor and water vapor into the wood material, melting the oil and fat in the wood material, and opening perforations in the wood material cell membrane. A method for treating wood materials such as chips. 3. In the processing according to claim 1 or 2,
The wood material and chlorine-based vapor degreasing cleaning organic solvent are sealed in a pressure vessel, and heating and pressurization and cooling and depressurization are repeated to promote the melting of the oil and fat components in the wood material by the chlorine-based vapor degreasing cleaning organic solvent. A method for treating wood materials such as chips, characterized by the above. 4. In a wood material processing operation, a methylene chloride solvent solution is heated and boiled to be vaporized, a gas of the methylene chloride solvent is permeated into the wood material, and an oil and fat content in the wood material is melted to form a wood material cell membrane. A method for treating a wood material such as chips, which comprises forming perforations. 5. In the wood material processing operation, water is added to a methylene chloride solvent solution to obtain a temperature of 100 to 13 degrees Celsius.
A wood material, such as chips, characterized by heating to about 0 ° C., permeating the vapor and steam of the methylene chloride solvent into the wood material to melt the oil and fat in the wood material, and opening perforations in the cell membrane of the wood material. Processing method. 6. In the processing of claim 4 or claim 5,
A wood material, such as a chip, characterized by sealing a wood material and a methylene chloride solvent in a pressure vessel, repeating heating and pressurization and cooling and depressurization to accelerate the melting of oil and fat components in the wood material by the methylene chloride solvent. Processing method.