JPH115028A - Treatment of liquefied matter and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of treating liquefied matter and a device therefor capable of drastically shortening a cooling time, preventing an excessive liquefying reaction, improving the quality of the liquefied matter and the like. SOLUTION: A liquefied raw material 'a' and a solvent 'b' or matter in which a catalyst 'c' is added to the solvent 'b' are agitated, liquefied and allowed to react with each other under a high temperature in a continuous type liquefying means 1 or a batch type liquefying treatment tank. To high temperature liquefied matter 'd' immediately after the liquefying reaction, water content 'w' is directly added through a water content adding means 2 and is rapidly cooled by the latent heat of vaporization of the added water content 'w'. A state in which the temperature of the liquefied matter 'd' is dropped after adding the water content is monitored through a sensor 3a and a water content added quantity adjusting means 3 for controlling the added quantity of the water content by the water content adding means 2 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to liquefaction of various liquefied raw materials (eg, wood flour, starch, paper, etc.) containing cellulose and saccharides and liquefied raw materials such as polyurethane resins after liquefaction. TECHNICAL FIELD The present invention relates to a method and an apparatus for treating a liquefied material applied to a cooling process of an object.

[0002]

2. Description of the Related Art In general, there are various methods and apparatuses for liquefying liquefied raw materials such as various types of liquefied raw materials (eg, wood flour, starch, paper, etc.) containing cellulose and saccharides, and polyurethane resins. . The main ones are as follows.

A batch processing method in which a raw material and a solvent (eg, phenol, PEG, etc.) are mixed, placed in a closed container, and liquefied under high temperature and high pressure.

[0004] A batch processing method in which a catalyst is added to a raw material and a solvent, and the mixture is liquefied under atmospheric pressure at or below the boiling point of the solvent.

[0005] A continuous treatment method in which a catalyst is added to a raw material and a solvent, and the mixture is liquefied under the atmospheric pressure of the boiling point or lower of the solvent.

However, in any of the methods, the liquefied product liquefied at a high temperature needs to be cooled to an appropriate temperature for subsequent steps (eg, neutralization, resinification, foaming, etc.). The conventional cooling method is based on a natural cooling method using heat radiation or an indirect cooling method using a jacket method or a coil method.

[0007]

In the above-mentioned conventional method, the cooling time is long and the productivity is poor. In addition, if the liquefied material is kept at a high temperature for a long time, the liquefaction reaction becomes excessive, and the heat of the liquefied material is increased. There is a possibility that the quality of the liquefied product may be deteriorated, such as impairing fluidity or decreasing the hydroxyl value effective for foaming.

An object of the present invention is to greatly reduce the cooling time,
An object of the present invention is to provide a method and an apparatus for treating a liquefied material, which can prevent an excessive liquefaction reaction and improve the quality of the liquefied material.

[0009]

According to the present invention, there is provided a method of liquefying a liquefied raw material and a solvent or a mixture of a solvent and a catalyst, which are continuously or batchwise stirred at a high temperature. It is characterized in that water is directly added to the high-temperature liquefied product immediately after the liquefaction reaction. Thereby, the high-temperature liquefied substance to which the water is added is cooled almost instantaneously to the predetermined temperature by the latent heat of evaporation of the added water.

In the above method, water is directly added to a high-temperature liquefied product immediately after a liquefaction reaction in a temperature range of the liquefied product in which latent heat of evaporation of water can be used. During the addition of water, the liquefied material is sufficiently stirred.

Further, the apparatus of the present invention is provided with a heating means and a screw feeder for transporting the liquefied raw material and the solvent or a mixture of the solvent and the catalyst with continuous stirring at a high temperature while carrying out a liquefaction reaction. Continuous liquefaction means,
Water addition means for adding water toward the high-temperature liquefied material in the screw feeder at a position downstream from the installation position of the heating means, and liquefaction after water addition at a position downstream from the installation position of the water addition means The temperature of the product is monitored through a sensor, and a water addition amount adjusting means for adjusting the amount of water added by the water adding means is provided, or a liquefied raw material and a solvent or a solution obtained by adding a catalyst to a solvent. Batch type liquefaction treatment tank equipped with a heating means and a stirring means for continuously stirring at a high temperature and causing a liquefaction reaction,
Water addition means for adding water to the high-temperature liquefied material in the batch-type liquefaction treatment tank, and monitoring of the temperature drop of the liquefied material after addition of water in the batch-type liquefaction treatment tank through a sensor, And a water addition amount adjusting means for adjusting the addition amount of water.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic diagram illustrating the overall configuration of a first embodiment of the present invention, and FIG. 2 is a schematic diagram illustrating the overall configuration of a second embodiment of the present invention.

In FIG. 1 showing a first embodiment of the present invention, reference numeral 1 denotes continuous liquefaction means, 2 denotes water addition means, 3 denotes water addition amount adjustment means, and 4 denotes solvent recovery means.

The continuous liquefaction means 1 transports the liquefied raw material a mixed with a predetermined ratio and the solvent b or a mixture of the solvent b and the catalyst b while continuously stirring at a high temperature to cause a liquefaction reaction. And a screw feeder 1b. Screw feeder 1b
Includes a cylindrical body 1b _1, and a screw 1b ₂ which rotatably equipped on the cylindrical body 1b _1, the screw 1b
₂ is rotationally driven by a motor 1c. Also, the cylindrical body 1b
_A hopper 1d is installed in communication with the start end side of ₁ . These cylinder 1b ₁ , screw 1b ₂ and hopper 1d are made of a corrosion-resistant material. Heating means 1a
Is for heating the plus catalyst c liquefied raw material a and a solvent b or solvent b passing through the cylindrical body 1b ₁ to a temperature suitable for liquefaction, the outer peripheral surface of the cylindrical body 1b ₁ Is illustrated, and a heating medium whose temperature is controlled by heating temperature adjusting means is supplied into the jacket. This heating means 1a
May be of a microwave heating type.

The water adding means 2 is provided at a position downstream of the installation position of the heating means 1a.
a water supply pipe 2a connected to an appropriate supply water source and a water supply control valve 2;
b.

The water addition amount adjusting means 3 monitors the temperature drop of the liquefied material d after the water addition at a position downstream of the installation position of the water addition means 2 through the sensor 3a, and opens the water supply control valve 2b. Is adjusted to adjust the amount of water added by the water adding means 2.

The solvent recovery means 4 is provided at an appropriate position on the terminal side of the continuous liquefaction means 1 to prevent environmental pollution and the like by a vaporized solvent. For example, the condenser 4a
And a gas-liquid separation tank 4b and an exhaust fan 4c.

The first embodiment of the present invention has the above-mentioned construction, and the liquefied raw material a and the solvent b or the mixture of the solvent b and the catalyst c added to the liquefied raw material a mixed in a predetermined ratio correspond to the continuous Is continuously conveyed from the hopper 1d by the screw feeder 1b while being stirred.
Is heated to a temperature suitable for the liquefaction reaction, and a liquefaction reaction occurs at a high temperature to obtain a predetermined liquefied substance d. Then, the water w is directly added to the high-temperature liquefied material d immediately after the liquefaction reaction from the water supply pipe 2a of the water adding means 2, and is rapidly cooled to a predetermined temperature by the latent heat of evaporation of the added water w. In this case, the moisture w
The temperature of the liquefied product d after the addition of water is monitored through the sensor 3a, and the amount of water added by the water adding means 2 is adjusted by adjusting the opening of the water supply control valve 2b.

Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, a liquefied raw material a mixed with a predetermined ratio and a solvent b or a mixture of the solvent b and a catalyst c are supplied by a predetermined amount from a supply pipe 5, and the mixture is stirred at a high temperature. A batch-type liquefaction treatment tank 8 provided with a heating means 6 and a stirring means 7 for causing a liquefaction reaction, a water addition means 2 for adding moisture w to the high-temperature liquefied substance d in the batch-type liquefaction treatment tank 8, A water addition amount adjusting means 3 for monitoring the temperature drop situation of the liquefied material d after adding water in the liquefaction treatment tank 8 through the sensor 3a and adjusting the amount of water added by the water addition means 2. is there.

The heating means 6 includes a batch type liquefaction treatment tank 8.
Is illustrated, and a heating medium whose temperature is controlled by heating temperature adjusting means is supplied into the jacket. The heating means 6
May be of another heating type. The stirring means 7 is provided with a stirring blade 7c at the tip of a rotating shaft 7b which is driven to rotate by a motor 7a.
Is illustrated as an example. The batch type liquefaction treatment tank 8 has a closed container shape made of a corrosion resistant material. The water adding means 2 and the water adding amount adjusting means 3
This is the same as that described in the first embodiment. Also,
The batch type liquefaction treatment tank 8 is provided with the same solvent recovery means 4 as described in the first embodiment.

In the second embodiment, a liquefied raw material a mixed with a predetermined ratio and a solvent b or a mixture of a solvent b and a catalyst c are mixed in a batch type liquefaction tank 8 at a high temperature for a predetermined time, A liquefaction reaction is caused by stirring. During this time, heating by the heating means 6 is performed, but the water adding means 2 is stopped. Then, water w is added from the water supply pipe 2a of the water adding means 2 to the liquefied substance d which has become high temperature by the liquefaction reaction, and the liquefied substance d is rapidly cooled to a predetermined temperature by continuing the stirring by the stirring means 7. After the start of the addition of the water w by the water adding means 2, the heating by the heating means 6 is stopped. In this case, the heating of the heat medium supplied to the heating means 6 may be stopped, or the heat medium may be actively cooled or switched to the spirit medium to be supplied. In any case, while the water addition unit 2 is adding the water w, the sensor 3a monitors the temperature drop of the liquefied material d in the batch-type liquefaction treatment tank 8, and the supply of the water w is excessive or insufficient. The opening degree of the water supply control valve 2b is adjusted by the water addition amount adjusting means 3 so that the water supply control valve 2b is closed and the supply of the water w is stopped when the liquefied material d reaches a predetermined temperature. It is appropriate to use the amount of water w within the temperature range of the liquefied material in which only the latent heat of vaporization of the water can be used (that is, 100 ° C. or higher). However, it is not always necessary to be limited to this range. Absent. Regardless of the method of adding the water w, for example,
It can be in the form of a raindrop, a jet, or any other appropriate state. During the addition of the water w, sufficient stirring of the liquefied material d is required.

[0022]

According to the first aspect, since water is directly added while stirring the liquefied material at a high temperature, the liquefied material is cooled almost instantaneously to a predetermined temperature by the latent heat of evaporation. Therefore, rationalization of drastically shortening the cooling time and saving water since unnecessary extra indirect cooling water is not required has become possible. The effects described above are more remarkable if the present invention is carried out with the addition of the second and third aspects. That is, since the liquefied product obtained by the high-temperature treatment is cooled almost instantaneously, an excessive liquefaction reaction can be prevented. As a result, an appropriate liquefaction rate can be obtained, and the quality of the liquefied product can be improved, such as improvement in the thermal fluidity of the liquefied product and improvement in the hydroxyl value. In addition, it is expected that water added at a high temperature may not only act as a cooling means, but also partially react with liquefied substances and positively contribute to improvement of heat fluidity and hydroxyl value. it can.

According to the fourth aspect, while the liquefaction reaction is continuously performed, cooling can be performed by directly adding water downstream of the liquefaction reaction, and the productivity can be improved by continuous processes.

According to the fifth aspect, while the liquefaction reaction is carried out in a batch system, water can be directly added to the high-temperature liquefied product for cooling, and the cooling time can be greatly reduced. Excessive liquefaction reaction can be prevented, and the quality of liquefied material can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating the overall configuration of a first embodiment of the present invention.

FIG. 2 is a schematic structural explanatory view of an entire apparatus according to a second embodiment of the present invention.

[Explanation of symbols]

 a Liquefied raw material b Solvent c Catalyst d Liquefied substance 1 Continuous liquefaction means 1a Heating means 1b Screw feeder 2 Water addition means 3 Water addition amount adjustment means 3a Sensor 4 Solvent recovery means 5 Supply pipe 6 Heating means 7 Stirring means 8 Batch liquefaction Processing tank

Claims (5)

[Claims] 1. A liquefaction raw material and a solvent or a mixture of a solvent and a solvent added thereto are continuously or batchwise stirred at a high temperature to cause a liquefaction reaction, and water is directly added to the high-temperature liquefied product immediately after the liquefaction reaction. A method for treating liquefied matter, characterized by adding. 2. The method for treating a liquefied product according to claim 1, wherein the water is directly added to the high-temperature liquefied product immediately after the liquefaction in the temperature range of the liquefied product in which the latent heat of vaporization of the moisture can be used. 3. The method for treating a liquefied product according to claim 1, wherein the liquefied product is sufficiently stirred during the addition of water. 4. A continuous liquefaction means provided with a heating means and a screw feeder for transporting the liquefied raw material and the solvent or a mixture of the solvent and the catalyst with a catalyst continuously at a high temperature while causing a liquefaction reaction. A water addition means for adding water toward the high-temperature liquefied material in the screw feeder at a position downstream of the installation position of the heating means, and after addition of water at a position downstream of the installation position of the water addition means. An apparatus for treating a liquefied substance, comprising: a water addition amount adjusting means for monitoring the temperature drop of the liquefied substance through a sensor and adjusting the amount of water added by the water adding means. 5. A batch type liquefaction treatment tank comprising a heating means and a stirring means for continuously stirring a liquefied raw material substance and a solvent or a mixture of a solvent and a catalyst at a high temperature to cause a liquefaction reaction, Water addition means for adding water to the high-temperature liquefied material in the batch-type liquefaction tank, and monitoring the temperature drop of the liquefied material after addition of water in the batch-type liquefaction tank through a sensor, An apparatus for treating a liquefied substance, comprising: a water addition amount adjusting means for adjusting an addition amount.