JP3178752B2 - Wood material processing method such as chips - Google Patents

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 used as raw materials in the pulp industry.

[0002]

2. Description of the Related Art Conventionally, wood materials such as chips, which are used as raw materials in the pulp industry, must be separated from non-cellulose, lignin and other components such as tar and oils and fats and oils contained in the wood materials. . Conventionally, in the pulp industry, wood chips and the like are put in a kettle, and boiled with sodium sulfite, caustic soda, etc., to completely separate the cells of the chips composed of cellulose, non-cellulose, lignin, etc., Non-cellulose, lignin and the like were separated therefrom, and the fiber portion constituting the pulp was taken out. However, at the stage of destruction of cells by boiling with sodium sulfite or caustic soda and separation of non-cellulose and lignin, many cellulose components that can make up pulp are mixed with oils and fats and discarded. There was.

[0003]

The object of the present invention is to eliminate the poor yield of the components constituting the pulp as described above, and it is possible to obtain several tens of cells per cell without completely destroying the cells of the chip. The pit, which is a wall hole provided with a valve mechanism, is provided with methylene chloride (CH ₂ Cl ₂ ), which is a chlorine-based vapor degreasing cleaning organic solvent.
Dissolved and opened with a solvent solution, etc., to extract the tar and fat components such as non-cellulose and lignin inside from this part,
Only the remaining pulp components such as cell membranes are dissolved with sodium sulfite or caustic soda to obtain pulp in a good yield.

[0004]

The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described. That is, in the wood material processing work, the solvent liquid of the chlorine-based steam degreasing cleaning organic solvent is heated and boiled to vaporize, and the gas of the chlorine-based steam degreasing cleaning organic solvent is permeated into the wood material, and the oils and fats in the wood material are removed. The perforated material is melted to open a perforation in the cell membrane of the wood material.

Further, in the wood material processing operations, to wipe the water solvent solution of chlorinated vapor degreasing organic solvent, Celsius
It is heated to about 40 degrees to about 130 degrees to infiltrate the vapor and water vapor of the chlorine-based vapor-degreasing organic solvent into the woody material, melt the oils and fats in the woody material, and open the perforations in the woody cell membrane. .

[0006] Further, the wood material and the chlorine-based steam degreasing organic solvent are sealed in a pressure vessel, and the heating and pressurizing and cooling depressurization are repeated, so that the oil-fat component in the wood-based material due to the chlorine-based steam degreasing cleaning organic solvent. Promotes the melting of

In the process of processing wood material, the methylene chloride solvent solution is heated and boiled to evaporate, the gas of the methylene chloride solvent is penetrated into the wood material, the oils and fats in the wood material are melted, and the wood material cell membrane is formed. A perforation is opened in the hole.

In addition, in the wood material processing operation, water is added to a methylene chloride solvent solution to reduce the temperature from 40 degrees Celsius to 1 degree.
The material is heated to about 30 ° C., and the vapor and water vapor of the methylene chloride solvent penetrate into the wood material, thereby melting the oils and fats in the wood material and opening perforations in the cell membrane of the wood material.

Further, the wood material and the methylene chloride solvent are sealed in a pressure vessel, and heating and pressurizing and cooling and depressurizing are repeatedly performed to promote the melting of the fat component in the wood material by the methylene chloride solvent.

[0010]

The operation of the present invention will be described. Trichlorethylene (CHC)
l = CCl ₂ ), perchlorethylene and (CCl ₂ =
CCl ₂ ), 1,1,1-trichloroethane (CH ₃
CCl ₃ ) and Freon 113 (CCl ₂ FCClF ₂ )
In this embodiment, a methylene chloride (CH ₂ Cl ₂ ) solvent solution is mainly used. The methylene chloride solvent liquid B is vaporized to obtain a wood material 1 for processing.
By dissolving the solid lignin in the cell tissue by permeation into the pits, the pits, which are wall holes provided with a valve mechanism, are melted, and the valve action of the temporary conduit or the pit of the conduit is destroyed. Non-cellulose and lignin confined within the lumen can be facilitated out of the perforation or wall valve. By piercing the pit, which is a wall hole provided with a valve mechanism, and destroying the valve action of the pit, boiling decomposition with sodium sulfite or caustic soda becomes easy in the next step, and the yield of the cellulose component is improved. It is.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The problems to be solved and means to be solved by 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 a method for processing woody materials such as chips according to the present invention;
FIG. 2 is a plan view of the processing apparatus using the woody material processing method of the present invention with the top lid removed, and FIG. 3 is a simplified view showing the preparation of processing work in the processing apparatus using the woody material processing method of the present invention. FIG. 4 is a simplified cross-sectional view showing a processing operation in a processing apparatus using the woody material processing method of the present invention, and FIG. 5 is a processing apparatus using the woody material processing method of the present invention. A simplified cross-sectional view,
FIG. 6 is a simplified cross-sectional view after the processing operation is completed in the processing apparatus that has performed the woody material processing method of the present invention.

Referring to FIGS. 1 and 2, the configuration of a processing apparatus that implements 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 and the inside of the main body 1 is further composed of three chambers of a solvent tank 1a, a processing chamber 1b, and a cooling chamber 1c. It is.

First, as shown in FIGS. 1 and 2, the solvent liquid tank 1a is disposed under the floor of the main body 1, and methylene, which is a chlorine-based organic solvent for steam degreasing and cleaning, is contained in the solvent liquid tank 1a. Chloride solvent liquid B is full. Other organic solvents for cleaning with steam degreasing include trichloroethylene (CHC
l = CCl ₂ ), perchlorethylene and (CCl ₂ =
CCl ₂ ), 1,1,1, -trichloroethane (CH
₃ CCl ₃ ) and Freon 113 (CCl ₂ FCCl
F ₂ ) and the like, but in this embodiment, a methylene chloride (CH ₂ Cl ₂ ) solvent solution B is used. A heat source pipe 4 for heating and boiling the methylene chloride solvent B is provided so as to evenly heat the entire inside of the tank from the outside of the tank.
Methylene chloride solvent solution B purified in
A solvent liquid return pipe 6 for returning to the inside and a solvent liquid extraction pipe 8 for extracting the methylene chloride solvent liquid B from the solvent liquid tank 1a and storing it in the solvent liquid tank 7 after the first half of the processing operation are completed. It is connected to the liquid tank 1a.

Next, the solvent solution tank 1a and the processing chamber 1b are separated by a floor 9 of a floorboard. The processing chamber 1b is heated and boiled at a low temperature of about 40 degrees Celsius in the solvent liquid tank 1a. The vapor of the methylene chloride solvent liquid B accumulates to form a methylene chloride solvent vapor layer C. During the processing operation, the well-permeable wood material transport container 11 containing the wood material 10 for processing is treated. It is placed on the floor 9 of the snowboard stand in the room 1b. Since the methylene chloride (CH ₂ Cl ₂ ) solvent solution B boils at about 40 degrees Celsius, it can be easily vaporized, and the vapor exerts an effect of defatting the oil component of the wood material.

The cooling chamber 1c, which is provided above the processing chamber 1b and separates the air / steam interface D, is for recovering excess solvent vapor ascending from the processing chamber 1b by distillation. The room temperature of the cooling chamber 1c is always set lower than the boiling point of the methylene chloride solvent B by 40 ° C. by the cooling water of the cooling pipe 12, so that the vapor of the methylene chloride solvent B rising from the processing chamber 1b is condensed. And accumulates in the condensate / water gutter 13 and passes 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, purified and returned to the solvent liquid tank 1a.

The operation of processing the woody material of the present invention will be described with reference to FIGS. First, as shown in FIG. 3, a wooden material transport container containing a wooden material 10 for processing by a crane 16 is placed on a floor 9 of a snowboard stand inside the main body 1 in a state where the upper cover 2 of the wooden material processing pressure container A is 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,... To make the interior of the wooden material processing pressure vessel A hermetically closed. When the power is turned on, the heat source is transmitted to the entire inside of the heat source pipe, whereby the methylene chloride solvent solution B in the solvent solution tank 1a is heated and boiled, and a solvent vapor layer C is created in the processing chamber 1b. The solvent vapor soaks into the wood material for treatment 10 of the wood material transporting container 11 left in the solvent vapor layer C, and the free water that has not been trapped gradually is expelled, and the cells of the wood material are formed. The lignin, which firmly solidifies the cellulose and non-cellulose, is melted. This process is continued for several hours, then the power of the heat source pipe 4 is turned off, and the methylene chloride solvent B in the solvent tank 1a is not necessary for the latter half of the processing. It can be transferred to tank 7.

By the above-described treatment, free water not contained in the wood material 10 for treatment is expelled,
A processing operation of melting the oil and fat component is performed, and the oil and fat portion of the wooden material is mixed with methylene chloride (CH ₂ C
l ₂ ) It is dissolved in the solvent B and comes out. When the degreasing process is completed, the oily portion of the woody material melts out, the cells are perforated, and the valve portion of the wall hole is destroyed. Next, as shown in FIG. 5, an operation of reducing the water content to a certain amount is performed.

In the drying operation, the solvent vapor permeated into the wood material for treatment 10 is expelled, and the oil or fat is dissolved to expel the perforated cells and the trapped free water from the lumen of the temporary conduit or conduit. It is. For this purpose, the hot air blower pipe 15 provided in the dome-shaped upper lid 2 is opened, and hot air is sent into the interior of the wooden material processing pressure vessel A. The solvent vapor and moisture that have permeated into the wood material for treatment 10 evaporate due to the hot air, and the moisture of the cell water also evaporates. This operation can be continued for several hours to completely evaporate the solvent vapor of methylene chloride and the trapped free water from inside the wood material 10 for processing. 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 transporting container 11 is carried out of the wooden material processing pressure container A by the crane 16.

During the processing operation, as shown in FIG. 4, the solvent tank 7 is used to maintain the pressure in the solvent tank 1a constant so that the methylene chloride solvent B surface of the solvent tank 1a and the solvent tank 7 can be maintained. It is lifted up so that the heights are the same, and when the first half of the processing operation is completed, the solvent solution tank 7 is lowered so that the methylene chloride solvent solution B in the solvent solution tank 1a can be easily recovered. Then, it is collected via the solvent liquid extracting pipe 8.

The wood material is degreased with a methylene chloride solvent solution B by melting the solid lignin in the cell tissue to pierce the cell membrane, break the valve in the temporary conduit or the wall hole of the conduit, and confine it. This makes it easier for the free water that has been removed to escape from the perforations or the valves in the wall holes.

In the pressure vessel A for processing woody material of the present invention, safety valves 17 and 18 are provided in the upper lid 2 and the solvent tank 1a, respectively.
In the event that a pressure abnormality occurs inside the wooden material processing pressure vessel A during the processing operation, the pressure is reduced to operate so that a constant pressure is always maintained. In the present invention, the methylene chloride solvent solution B and the wood material for processing 10 are hermetically arranged inside the wood material processing pressure vessel A, and the methylene chloride solvent B is heated by the heat source pipe 4 or by a heat source from the outside. Liquid B
Is turned into steam, the pressure is increased to about 6 kg / cm 2, the supply of the heat source to the heat source pipe 4 is stopped after about 1 hour, and the methylene chloride solvent B is returned to the aqueous solution.
Reduce the pressure to about atmospheric pressure, and heat and pressurize after 1 hour,
Further, by repeating the operation of cooling and reducing the pressure after one hour, the degreasing treatment by the vapor of the methylene chloride solvent solution B can be further promoted.

When only the methylene chloride solvent solution B is disposed in the solvent solution tank 1a in the wood material processing pressure vessel A and heated and evaporated, it can be vaporized at about 40 degrees Celsius. In the early stage of the treatment of the wood material, the surface of the wood material for treatment 10 is hardened, so that the vapor of the methylene chloride solvent B hardly penetrates into the cells. with chloride solvent solution B, mixing about 50% water, Celsius 40
It is effective to heat the water and methylene chloride solvent solution B by explosive vaporization and heat them up to 130 to 130 degrees Celsius.

By mixing the water vapor with the vapor of the methylene chloride solvent solution B and infiltrating the wood material for treatment 10, the cells on the surface of the wood material for treatment 10 are opened with water vapor, and the methylene chloride solvent The effect of permeating the vapor of the liquid B to accelerate the degreasing treatment is exhibited.

Further, methylene chloride (CH ₂ C
l ₂ ) When the degreasing work of the wood material is completed with the solvent solution B and water, the methylene chloride (CH ₂ Cl ₂ ) solvent solution B and water return to a liquid again. And stay in this solution in a separated state. By physically separating the oil component of the woody material, a natural resin raw material can be obtained.

[0026]

As described above, the present invention has the following advantages. First, methylene chloride (CH ₂ C), which is a chlorine-based steam degreasing organic solvent, is used.
l ₂ ) The vapor of the solvent solution B acts on the oil and fat components of the woody material to degrease and melt them, thereby opening perforations in a part of the woody material cells containing the cell water, and also forming temporary pipes and conduits. The valve in the wall hole is destroyed, and the trapped free water, which was conventionally difficult to remove, is easily released from this portion. Therefore, the processing time of the wood material is remarkably reduced as compared with the conventional method, so that a large amount of the wood material can be processed and the time and energy can be greatly saved.

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

Third, the methylene chloride solvent, which is a chlorine-based vapor degreasing and cleaning organic solvent used for greatly reducing the processing time, is a highly safe chlorine-based solvent that does not damage woody materials. Since the boiling point is as low as 40 degrees, time and energy can be saved and it is very convenient when hot air as a finish of the processing operation is sent into the wood material processing apparatus or when it is recovered by distillation.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a processing apparatus using a method for processing a woody material such as chips according to the present invention.

FIG. 2 is a plan view of the processing apparatus using the woody material processing method of the present invention, with an upper lid removed.

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

FIG. 4 is a simplified cross-sectional view showing a processing operation in a processing apparatus using the woody material processing method of the present invention.

FIG. 5 is a simplified cross-sectional view showing a state at the time of completion of a processing operation in a processing apparatus using the woody material processing method of the present invention.

FIG. 6 is a simplified cross-sectional view after a processing operation is completed in a processing apparatus that performs the woody material processing method of the present invention.

[Explanation of symbols]

 A Pressure vessel for processing wood material such as chips B Methylene chloride solvent liquid C Solvent vapor layer D Air / vapor interface 1 Main body 1a Solvent liquid tank 1b Processing chamber 1c Cooling chamber 2 Top lid 4 Heat source pipe 9 Floor of snowboard stand 10 Wood for processing Material 15 Hot air blower

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) D21C 1/00-11/14 B27K 1/00-9/00

Claims (6)

(57) [Claims] In a wood material processing operation, a solvent solution of a chlorine-based steam degreasing and cleaning organic solvent is heated and boiled to be vaporized,
A method for treating woody material such as chips, characterized by permeating gas of said chlorine-based steam-degreasing organic solvent into woody material, melting oils and fats in the woody material, and opening perforations in a cell membrane of the woody material. 2. In a wood material processing operation, water is added to a solvent solution of a chlorine-based steam degreasing and cleaning organic solvent, and the temperature is reduced to 40 degrees Celsius.
Heated from time to about 130 degrees, the vapor and water vapor of the vapor degreasing organic solvents chlorine to penetrate the wood material, and characterized by melting the fat content in the wood material, to open a perforation in wood material cell membrane Wood material processing method such as chipping. 3. The process according to claim 1, wherein
The wood material and the chlorine-based steam degreasing organic solvent are sealed in a pressure vessel, and heating and pressurizing and cooling and depressurizing are repeated to promote the melting of the oil component in the wood material by the chlorine-based steam degreasing and cleaning organic solvent. A method for treating woody material such as chips. 4. In a wood material processing operation, a methylene chloride solvent solution is heated and boiled to vaporize, a gas of the methylene chloride solvent is infiltrated into the wood material, an oil and fat in the wood material is melted, and a wood material cell membrane is formed. A method for treating woody material such as chips, characterized by opening perforations. 5. In a wood material processing operation, water is added to a methylene chloride solvent solution to reduce the temperature from 40 degrees Celsius to 130 degrees Celsius.
To a temperature of about 30 ° C., so that the vapor and water vapor of the methylene chloride solvent permeate the wood material, melt the oils and fats in the wood material, and open perforations in the wood membrane of the wood material. Method. 6. In the processing according to claim 4 or claim 5,
A wood material, such as chips, characterized in that the wood material and a methylene chloride solvent are sealed in a pressure vessel, and heating and pressurizing and cooling and depressurizing are repeated to promote the melting of the fat component in the wood material by the methylene chloride solvent. Processing method.