JP2000210502A - Extractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an extractor suitable for the extractive treatment of an asphalt-containing mineral or the like with a volatile org. solvent, in short, an extractor capable of efficiently and continuously extracting the asphalt- containing mineral containing impurities or moisture with the high temp. volatile org. solvent in large quantities. SOLUTION: In a horizontal extractor wherein a rotary shaft 6 having stirring blades 9 is horizontally provided in a main body tank 1 storing a volatile org. solvent and having a space formed above the liquid surface of the volatile org. solvent, the charging chute 32 of a solid raw material provided to the upper part of the main body tank 1 and inserted into the main body tank 1 up to the position under the liquid surface of the volatile org. solvent R, a dome 34 having a solvent vapor discharge port 35 for discharging the solvent vapor in the main body tank 1 provided to the top part thereof and formed so as to have a diameter larger than that of the solvent vapor discharge port 35 to be provided to the upper wall of the main body tank 1 and an inert gas supply nozzle 33 supplying inert gas to the space are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal extraction apparatus using a volatile organic solvent, and more particularly to a natural asphalt (i.e., an asphalt-containing mineral) contained in underground rocks and soil. The present invention relates to an extraction device suitable for extracting asphalt.

[0002]

2. Description of the Related Art In general, a solid extraction apparatus for extracting a desired component from a solid raw material by using a solvent dissolves at least a solute contained in the solid raw material into the solvent. It also performs the step of separating the extraction residual phase and the extraction liquid in the above, but in various forms depending on various conditions such as the shape, size, physical properties, or treatment amount of the solid raw material to be treated Has been developed and put into use.

FIG. 10 shows one type of a conventional extraction device.
1 shows a dispersing contact type extraction device with horizontal stirring blades. This extraction device is used for collecting tallow,
Main body tank 10 having a sealed structure and storing a solvent
0, a rotating shaft 102 having stirring blades 101 is provided in a horizontal direction, a raw material inlet 103 is provided at an upper part of a main body tank 100, and a discharge valve 104 for discharging the internal vapor is provided. , A supply port 105 of the extracted residue, a supply pipe 107 of the solvent, and a take-out pipe 108 of the recovered micelle.

In the extraction device having the above configuration,
After the solvent is supplied from the solvent supply pipe 107 into the main body tank 100 and the raw material is supplied from the input port 103,
While introducing steam from the supply pipe 105, the rotating shaft 102
Is rotated to stir the inside with stirring blades 101, thereby recovering tallow into the solvent.
After the completion of the process, the collected micelle is extracted from the extraction pipe 108 and the extracted residue is extracted from the outlet 106.

[0005]

According to the above-mentioned conventional extracting device, although the extracting operation such as the collection of beef tallow can be performed relatively efficiently, the extracting device is not suitable for the extraction operation. For example, when used for the purpose of extracting asphalt or the like from a relatively wet solid material such as asphalt-containing minerals with an organic solvent such as kerosene having volatility, ignition or explosion due to static electricity or the like due to the above organic solvent. And other preventive measures will be inadequate. In addition, the steam generated by being heated in the extraction process,
In addition to the solvent vapor, the water vapor in the solid raw material will also contain water vapor, and the large amount of vapor discharged will cause the organic solvent to be entrained in water droplets. However, such a large-scale device is required. Furthermore, solid raw materials such as asphalt-containing minerals
Depending on the degree of pretreatment, insoluble solids that settle out of light contaminants floating on volatile organic solvents such as wood chips and grass leaves without dissolving in volatile organic solvents such as inorganic minerals such as rocks and soil It is necessary to take measures such as preventing the extraction device from being clogged by substances other than these dissolved substances, and separately consider the operation of separating minerals and the like from the above slurry after the extraction process is performed. There is a problem that it is necessary.

[0006] For this reason, the above extraction apparatus is insufficient for extracting asphalt or the like from a solid raw material such as an asphalt-containing mineral with a volatile organic solvent during operation. Excellent safety,
Development of an efficient and efficient extraction device has been desired.

[0007] The present invention has been made in view of such circumstances, and provides an extraction apparatus suitable for extracting asphalt-containing minerals and the like with a volatile organic solvent. It is an object of the present invention to provide an extraction device capable of efficiently and continuously extracting a large amount of asphalt-containing minerals containing a high-temperature volatile organic solvent.

[0008]

According to a first aspect of the present invention, there is provided an extraction apparatus having a main body in which a volatile organic solvent is stored and a space is formed above the liquid level of the volatile organic solvent. In the tank, a rotating shaft having stirring blades is provided in a horizontal direction, and in a horizontal extraction device for stirring and extracting a solid raw material supplied in the main body tank in a volatile organic solvent, the upper part of the main body tank is provided. The provided solid material input chute and the steam outlet for discharging the steam in the main body tank are provided at the top, and are formed on the upper wall of the main body tank so as to have a larger diameter than the steam outlet. A dome, and an inert gas supply nozzle for supplying an inert gas to the space.

Further, in the extraction device according to the present invention, a volatile organic solvent is stored inside, and
In the main body tank in which a space is formed above the liquid surface of the volatile organic solvent, a rotating shaft having stirring blades is provided in the horizontal direction, and the solid raw material supplied into the main body tank is stirred in the volatile organic solvent. In the horizontal extraction device that performs the extraction, the solvent supply port provided at one end of the main body tank, the input chute of the solid raw material provided at the upper end of the one end of the main body tank, and the opening through which the substance in the main body tank flows are provided. A discharge tank provided at the other end of the main body tank through the formed partition wall and having an upper side communicating with the space, and provided at a bottom of the discharge tank by a signal of a level meter provided in the discharge tank. A control device that adjusts the opening of the discharge valve to maintain the liquid level in the discharge tank at a predetermined position, and a steam outlet for discharging steam in the main body tank at the top thereof, and The upper part of the main tank is formed with a diameter larger than the discharge port. A dome provided, is characterized in that a inert gas supply nozzle for supplying an inert gas to the space.

[0010] According to a third aspect of the present invention, in the main body tank according to the second aspect, the rotary shaft penetrates and a plurality of partitions are formed in the main body tank in a direction intersecting the rotary axis. A plurality of partition walls are provided to communicate the above space with each other, and each partition wall includes:
An opening for circulating the inside of the tank such as the volatile organic solvent and the solid raw material is provided.

[0011] The invention described in claim 4 is the same as the claim 3.
In the invention described in the above, the stirring blade is attached to the stirring arm in an inclined manner so as to move the contents in the tank from the one end to the other end of the main tank with the rotation of the rotating shaft. A slit is formed in a lower part of the partition wall and a lower part of a partition wall between the main body tank and the discharge tank.

Next, in the extraction device according to the present invention, a volatile organic solvent is stored therein, and a space is formed above a liquid level of the volatile organic solvent in a main body tank. A rotary shaft having stirring blades is provided in the horizontal direction, and is provided at one end of the main body tank in a horizontal extraction device that performs stirring and extraction of the solid raw material supplied into the main body tank in the volatile organic solvent. A solvent supply port, an input chute for solid material provided at the upper end of one end of the main body tank, and an opening through which the contents in the main body tank flow are formed at the upper part, and a slit is formed through a partition wall formed at the lower part. The discharge tank is provided at the other end of the main body tank and the upper part communicates with the space, and the opening degree of the discharge valve provided at the bottom of the discharge tank is adjusted by a signal of a level meter provided in the discharge tank. And the liquid level of the discharge tank A control device for maintaining a predetermined position, an overflow pipe having one end attached to the upper part of the side wall of the discharge tank and communicating with the space, and the other end communicating with the downstream side of the discharge valve; And an inert gas supply nozzle for supplying the inert gas, and the stirring blade is inclined to a stirring arm so that the contents in the tank are moved from the one end to the other end of the main tank with the rotation of the rotation shaft. It is characterized in that it is attached by mounting.

According to a sixth aspect of the present invention, in the main body tank according to the fifth aspect, a steam discharge port for discharging steam in the main body tank is provided at the top of the main body tank. A dome formed to have a larger diameter than the steam discharge port and provided on an upper wall of the main body tank is provided.

The invention described in claim 7 is the same as the invention described in claim 5.
Or a plurality of partition walls which penetrate the rotating shaft and partition the inside of the main body tank into a plurality of sections in a direction intersecting with the rotating shaft, and communicate the space with each other above. Are provided at the upper part of each partition wall, and an opening is formed at the upper part of the partition wall, and a slit is formed at the lower part.

Further, in the invention according to claim 8, the slit according to any one of claims 4 to 7 has a larger area on the rotation direction side of the stirring arm with respect to a vertical line passing through the center of the rotation axis. According to a ninth aspect of the present invention, there is provided the main body tank according to any one of the third, fourth, seventh and eighth aspects, wherein a plurality of heating means independent of each other are provided corresponding to the sections. Is provided.

Next, according to a tenth aspect of the present invention, the chute for charging a solid material according to any one of the first to ninth aspects is inserted to a position below the level of the volatile organic solvent. It is a feature. Claim 1
According to a first aspect of the present invention, the stirring blade according to any one of the first to tenth aspects is attached to a tip end of a stirring arm provided substantially at right angles to the rotation shaft, and the stirring blade is connected to the rotation shaft. A plurality of rod-shaped stirring rods are attached to the intermediate stirring arm in parallel with the rotation axis.

Further, the invention according to a twelfth aspect of the present invention is directed to an inert gas which communicates with the bottom of the main body tank according to any one of the first to eleventh parts from outside to inside the main body tank. A plurality of nozzles for supplying the pressure are provided, and the invention according to claim 13 is characterized in that:
A drive device for each of the rotating shafts is provided at both ends of the rotating shaft according to any one of (1) to (12).

The invention according to a fourteenth aspect is characterized in that a closed rotary screen is provided downstream of the discharge valve according to any of the second to thirteenth aspects. The invention according to claim 15 is, downstream of the steam outlet according to any one of claims 1 to 14,
A condenser for condensing the discharged vapor and a decanter for separating the solvent from the condensate by utilizing a specific gravity difference are provided, and the solvent separated in the decanter is closed again via the return line. It is characterized by being returned to the main body tank.

In the extraction device according to the first aspect, since the inert gas supply pipe nozzle for supplying the inert gas is provided in the upper space of the main body tank, the inert gas is supplied from the inert gas supply nozzle. By supplying and making the pressure higher than the normal pressure, it is possible to prevent the air from flowing into the main body tank and to prevent explosion due to static electricity or the like. In addition, the upper wall of the main body tank is provided with a steam outlet at the top and a dome formed with a larger diameter than the steam outlet, so that steam generated inside the main body tank is at the top of the dome. When the vapor is discharged from the vapor discharge port of the section, the linear velocity of the vapor discharge is reduced in the space inside the dome, and the solvent in the form of water drops falls, thereby preventing the entrainment of the solvent. In particular, when a solid material having a relatively high moisture content is subjected to the extraction treatment, in addition to the solvent vapor vaporized inside the main body tank, water vapor in the solid raw material that is vaporized is also included, and the amount of vapor increases. Since the amount of entrainment increases, it is more important to prevent entrainment of the solvent in the space inside the dome.

In the invention described in the present invention,
The present invention can be applied not only to a continuous extraction device but also to a batch extraction device. The upper wall on which the dome is provided is an upper wall of a trunk, a roof, or a head forming a main body tank. Further, the volatile organic solvent of the present invention refers to an organic solvent having volatility at the temperature and pressure conditions during the extraction process, regardless of whether or not it has volatility at normal temperature and normal pressure. is there. Incidentally, examples of the volatile organic solvent used in the extraction device according to the present invention include kerosene, light oil, gasoline, naphtha, trichloroethane, and the like.

According to a second aspect of the present invention, in addition to the first aspect, a solvent supply port and a solid material charging chute are provided at one end of the main body tank, and an opening is formed at the other end. A discharge tank is provided through the divided partition wall, and the opening of a discharge valve provided at the bottom of the tank is adjusted by a signal of a level meter provided in the discharge tank to maintain the liquid level of the discharge tank at a predetermined position. A control device is provided. Therefore, according to the present extraction apparatus, in addition to the operation of the extraction apparatus according to claim 1, a discharge valve provided at the bottom of the discharge tank by the control device further sets the liquid level of the discharge tank to a predetermined position. Since it is controlled so as to maintain the required extraction time, it is possible to continuously perform the extraction operation while securing the required extraction time, and it is possible to reliably discharge even the extracted product containing the solid residue. , The solid raw material and the volatile organic solvent are continuously supplied, and the insoluble residual solids contained in the processing liquid or the solid raw material that is the extracted product can be continuously discharged. Thus, continuous extraction is possible.
The opening may be an overflow-type gate or an opening formed in a submerged portion or near the bottom of the tank, but an overflow-type gate is more preferable.

According to the third aspect of the present invention,
For example, since the inside of the tank made of a mixed slurry of the solid raw material and the volatile organic solvent moves from one end to the other end in the main tank through the opening provided in the partition wall, the short path The number of times of extraction is reduced, a predetermined extraction time (degree of extraction) can be secured, and continuous extraction can be reliably performed. The opening may be an overflow-type gate or an opening formed in a submerged portion or near the bottom of the tank, but an overflow-type gate is more preferable.

According to the fourth aspect of the present invention, the stirring blade is attached to the stirring arm at an angle, and the slit is formed in the lower part of the partition wall or the like. Even if is precipitated, the precipitate can be moved to an adjacent section as the stirring blade rotates. As a result, the sediment precipitated in the main body tank is moved from one end of the main body tank to the other end through the slit of the partition wall, and further provided at the lower part of the partition wall with the discharge tank at the other end of the main body tank. Since the liquid reaches the discharge tank through the slit and is finally discharged out of the system from the discharge valve, it does not accumulate in the tank.

The dimensions of the slits are affected by the size of the solid raw material to be pulverized in the pretreatment and cannot be specified unconditionally. For example, when treating asphalt-containing minerals,
Slit height 50-100mm, slit length 100
It is preferably about 500 mm. When the slit is provided, the opening of the partition wall or the partition wall specified in claims 2 and 3 does not need to be provided near the bottom of the tank.

Next, in the extraction apparatus according to the fifth aspect, a solvent supply port and a solid material charging chute are provided at one end of the main body tank, and an opening is formed at the upper end and a slit is formed at the lower end at the other end. A discharge tank is provided through the divided partition wall, and the opening of a discharge valve provided at the bottom of the tank is adjusted by a signal of a level meter provided in the discharge tank to maintain the liquid level of the discharge tank at a predetermined position. To provide a control device,
Further, an overflow pipe is provided at one end of the upper portion of the side wall of the discharge tank and communicates with the space, and the other end communicates with the downstream side of the discharge valve. Therefore, according to the present extraction device, the control device controls the discharge valve provided at the bottom of the discharge tank so as to maintain the liquid level of the discharge tank at a predetermined position. And the extraction operation can be continuously performed.

In addition, the stirring blade is attached to the stirring arm at an angle, and the slit is formed at the lower part and the opening is formed at the upper part of the partition wall between the main body tank and the discharge tank. Such as asphalt-containing minerals from light contaminants floating on volatile organic solvents such as rocks and soil to non-soluble solids that settle without dissolving in volatile organic solvents such as inorganic minerals Processing, even if solids such as insoluble solids precipitate at the bottom of the main body tank, it is moved from one end of the main body tank to the other end with the rotation of the stirring blade, and further at the other end of the main body tank. The liquid reaches the discharge tank through a slit provided at the lower part of the partition wall with the discharge tank, and is finally discharged out of the system from the discharge valve with the rotation of the stirring blade.

On the other hand, the light contaminants floating on the volatile organic solvent are similarly moved from one end of the main body tank to the other end, and are further provided at the upper end of the partition wall with the discharge tank at the other end of the main body tank. From the outlet to the discharge tank, and finally to the discharge valve downstream from the overflow pipe provided in the discharge tank.
As a result, it is possible to continuously supply the solid raw material and the volatile organic solvent, and to continuously discharge the extracted product without light impurities and sediments accumulating in the tank and clogging. Continuous extraction becomes possible. Furthermore, since an inert gas supply pipe nozzle for supplying an inert gas is provided in the upper space of the main body tank, the inert gas is supplied from the inert gas supply nozzle to be in a pressurized state from normal pressure, By preventing the air from flowing into the main body tank, ignition and explosion due to static electricity or the like can be prevented.

According to the sixth aspect of the present invention, the upper wall of the main body tank has the steam outlet at the top and the dome formed to have a larger diameter than the steam outlet. When the steam generated inside the main body tank is discharged from the steam discharge port at the top of the dome, the linear velocity of the steam discharge is reduced in the space inside the dome, and the solvent in the form of water drops falls. Is prevented from being entrained. In the present invention, the meaning of the volatile organic solvent and the dome of the present invention is the same as that of the first embodiment.

Further, in the invention according to claim 7,
For example, since the inside of the tank made of a mixed slurry of the solid raw material and the volatile organic solvent moves from one end to the other end in the main tank through the opening provided at the upper part of the partition wall, Short passes are reduced, a predetermined extraction time (degree of extraction) can be secured, and continuous extraction can be reliably performed. Moreover, even if solids such as insoluble solids settle on the bottom of the main body tank, the sediment smoothly adjoins via a slit provided at the lower part of the partition wall of the main body tank as the stirring blade rotates. The main tank is moved from one end to the other end. In addition, light contaminants floating on the volatile organic solvent are also smoothly moved to the adjacent section through the opening provided at the upper part of the partition wall of the main tank, and from one end of the main tank to the other end. It is moved and does not accumulate in the main tank.

If the openings of the partition walls specified in claims 3 and 7 are provided so as to be alternately left and right between adjacent partition walls, for example, a mixed slurry of a solid raw material and a volatile organic solvent can be used. Since the inside of the tank moves meandering from one end side to the other end side in the main body tank through the openings provided alternately on the adjacent partition walls, the predetermined extraction time ( This is preferable because it is easy to secure the degree of extraction) and it is possible to reliably perform continuous extraction. It is more preferable to provide the opening so that the opening can be adjusted. Thus, the opening can be set to an appropriate opening in accordance with the operating conditions, and the short path can be further prevented.

According to the eighth aspect of the present invention, since the slit is formed so as to have a large area on the rotation direction side of the stirring arm, sediment such as insoluble solids can be rotated by the rotation of the stirring blade. With the movement, it can be smoothly moved to the adjacent section. As a result, the sediment deposited in the main tank is
The main tank is moved from one end to the other end through the slits of the partition wall. As the aspect in which the area in the rotation direction side of the stirring arm in the slit is wide, the slit length in the rotation direction side of the stirring arm is longer, the slit width in the rotation direction side of the stirring arm is wider, and the slit length and the slit width are different. There are cases where both are wide. For example, the size when the slit length on the rotation direction side of the stirring arm is longer cannot be specified unconditionally, depending on the size of the solid raw material that is crushed in the pretreatment, but when processing asphalt-containing minerals, Preferably, the slit height is in the range of 50 to 100 mm, the slit length in the rotation direction side of the stirring arm is 100 to 450 mm, and the slit length on the side opposite to the rotation direction of the stirring arm is in the range of 0 to 50 mm. Accordingly, the aspect in which the area of the slit in the rotation direction side of the stirring arm is large includes the case where the slit is not formed on the side opposite to the rotation direction of the stirring arm.

Further, in the invention according to the ninth aspect, since a plurality of heating means independent of each other are provided corresponding to the sections, the amount of heat of each heating means is controlled independently, so that each section is controlled. Can be controlled to the optimum temperature for each extraction, and the function as a continuous extraction device can be improved. Here, in order to provide independent heating means corresponding to the sections, depending on various conditions such as the size of the main body tank and the number of formed sections, the heating means may be provided for each section as appropriate, or the heating means may be provided for two or more sections. The heating means may be provided independently of each other, and as the heating means, a heating means such as an electric heating coil or a jacket may be applied in addition to a heating pipe through which a heat medium such as steam is passed. In addition, as this heating means, it is preferable to provide a heating pipe through which a heating medium such as steam flows inside the main body tank in terms of thermal efficiency and safety. When this heating pipe is provided inside the main body tank, it is generally provided at the bottom of the tank due to natural convection, but in the extraction device of the present invention, the rotating shaft having the stirring blade is horizontal. It is preferably provided in the upper part of the main body tank below the liquid level of the volatile organic solvent because it is provided in the direction and is sufficiently stirred. As a result, there is no heating pipe at the bottom of the tank where solids of inorganic minerals and slurries that do not dissolve in solvents such as rocks and soil precipitate, and the sediment is easily discharged from the main tank, and the heating pipe is connected independently of the stirring blade. It can be provided, for example in the form of a simple tube sheet.

According to the tenth aspect of the present invention,
Since the chute for charging the solid raw material is inserted below the level of the volatile organic solvent, air is better prevented from flowing into the upper space of the main body tank, and an inert gas is supplied to the space at normal pressure. The more pressurized state can further prevent the inflow of air and prevent ignition or explosion due to static electricity or the like. Further, in the invention according to claim 11,
When the rotating shaft arranged in the horizontal direction is rotated, a stirring blade attached to the tip of the rotating shaft is provided with a solid material and a volatile organic solvent in the main body tank through a stirring arm provided substantially at right angles to the rotating shaft. The inside is stirred by frying from the bottom. At this time, since a plurality of rod-shaped stirring rods are attached to the stirring arm, the stirred solid material in the floating state is further stirred by the stirring rods.

Further, in the invention according to the twelfth aspect, even if the power is stopped due to a power failure or the like, the stirring by the stirring blade is stopped, the slurry is separated, and the solid content is settled on the bottom of the tank, Since the inert gas can be blown from a number of nozzles provided at the bottom of the tank and the sediment can be sowed and stirred, the restart operation can be easily performed. In addition, it is preferable that a plurality of the nozzles are arranged at a constant interval on the bottom of the main body tank.

According to the thirteenth aspect of the present invention, since the driving devices are provided at both ends of the rotating shaft, it is possible to reduce the required rotating torque for driving the rotating shaft. As a result, the diameter of the rotating shaft to be disposed in the main body tank can be further reduced. In addition,
In the above-mentioned main body tub, the present invention relates to a case where a bearing for rotatably supporting the rotary shaft is provided in the main body tub, and a seal housing portion is provided at a portion where the rotary shaft penetrates the main body side wall. In the extraction device, a slurry that is a mixture of a solid raw material, particularly a mineral such as rocks and soil, and a volatile organic solvent is formed. Therefore, measures against biting and leakage of the rotating shaft bearing system by the slurry are taken into consideration. There is a need.

In view of the above, a supply pipe is provided in the bearing so as to communicate with the inside of the bearing and supply a solvent or an inert gas from the outside of the main body tank. If a supply pipe for supplying an inert gas from the outside is provided, the bearing can be supplied with an inert gas or a fresh solvent by continuously applying pressure from the outside of the main body tank via the supply pipe. Therefore, it is possible to prevent the slurry composed of the solid raw material and the volatile organic solvent from entering the bearing, and to inject the inert gas into the gland seal portion also for the seal of the rotating shaft penetrating the main body tank. Therefore, it is preferable that slurry can be prevented from entering the ground seal portion. At this time, it is more preferable that the supply pipe is introduced at an intermediate position between the bearing and the gland seal.

According to the fourteenth aspect of the present invention,
The slurry containing the treated residue solids and the treatment liquid discharged from the discharge valve is subjected to solid-liquid separation by a closed rotary screen to remove solid residues which are not extracted impurities. On the other hand, according to the invention as set forth in claim 15, steam generated inside the main body tank such as water vapor in the solid raw material and water vapor or solvent vapor obtained by evaporating the solvent in the main body tank is sent to the condenser, The condensate condensed in the above step is separated into water and solvent using the difference in specific gravity in the decanter, and the separated solvent is returned to the main tank. Excellent.

Therefore, the invention according to any one of the first to fifteenth aspects of the present invention is directed to an extracting apparatus for extracting asphalt from asphalt-containing minerals with kerosene as a volatile organic solvent from the asphalt-containing minerals. In the case of, a remarkable effect is achieved. By the way,
When the above-described asphalt extraction is performed by the extraction device according to the present invention, the extraction condition in the main body tank is a temperature of 5 ° C.
The temperature is 0 to 150 ° C, preferably 80 to 120 ° C, more preferably 100 to 105 ° C, and the pressure is 1.0 to 1.5 atm, preferably 1.0 to 1.05 atm. Thereby, asphalt can be effectively extracted from the asphalt-containing mineral.

[0039]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of an extraction device according to the present invention will be described below with reference to the drawings. FIGS. 1 to 9 show an embodiment in which the extraction apparatus of the present invention is applied to an apparatus for extracting asphalt from asphalt-containing mineral as a solid raw material using kerosene as a volatile organic solvent. Reference numeral 1 denotes a main body tank. This main body tank 1
The whole is a horizontal hermetic container in which the amount of heat dissipated is reduced by the heat insulating material and the exterior, and the inside is divided into a plurality (five in the figure) of partitions 3 by a plurality (four in the figure) of partition walls 2a and 2b. Have been. These partition walls 2a, 2b are provided such that the upper ends are located below the top plate 1a of the main body tank 1 by a predetermined dimension. And in this main body tank 1,
The volatile organic solvent R is stored below the upper end portions of the partition walls 2a and 2b, whereby the sealed space (space) S formed above the liquid surface of the volatile organic solvent R is formed.
Communicate with each other at the upper part of the adjacent section 3 (see FIG. 6).

As shown in FIGS. 3 and 4, overflow-type gates (openings) 4a, 4b through which a volatile solvent flows are formed on the partition walls 2a, 2b, as shown in FIGS. The gates 4a and 4b have an opening area that can be adjusted.
The gate 4a provided on the partition wall 2b and the gate 4b provided on the adjacent partition wall 2b are formed so as to be alternately left and right with respect to the vertical line at the center of each partition wall 2a, 2b.
A rotary shaft 6 is horizontally disposed at the center of the main body tank 1 so as to penetrate the partition walls 2a and 2b.

In the lower part of these partition walls 2a, 2b, there is formed a slit 5 having a large area in the rotation direction side of the stirring arm, which will be described later, indicated by an arrow in the figure with respect to a vertical line passing through the center of the rotation shaft 6. Have been. That is, in the present embodiment, as shown in FIGS. 3 and 4, the slit length of the left portion is longer than the slit length of the right portion with respect to a vertical line passing through the center of the rotating shaft 6. Have been. By the way, the height of the slit 5 is 50-100.
mm, the length of the stirring arm on the rotation direction side is 100 to 450 m
m, the length on the opposite side to the rotation direction of the stirring arm is 0 to 50 mm
Is formed in the range.

As shown in FIG. 5 to FIG.
Is a hollow shaft, and 60
A large number of short pipes 7 extending radially at an angle of ° are mounted substantially perpendicularly to the axis of the rotating shaft 6. Then, the stirring arm 8 is attached to the through pipe 7.
Are mounted radially. One end of the stirring arm 8 extends to the bottom of the tank, and the other end extends below the partition walls 2a and 2b, and the stirring blade 9 is fixed to the end. This stirring blade 9
It is a plate-shaped member, and the solid raw material and the volatile organic solvent are transferred from one end 1b to the other end 1c of the main body tank 1 with the rotation of the rotating shaft 6.
Is mounted so as to be inclined with respect to the axis of the agitating arm 8 so as to be moved toward. Further, between the stirring blade 9 of the stirring arm 8 and the rotating shaft 6, a rod-shaped stirring rod 1 is provided.
A plurality (four in the figure) is attached so that 0 is parallel to the rotating shaft 6.

Reference numeral 8a in the figure denotes a plate joined to the through pipe 7, and a fastening shaft 8c is stretched between the plate 8a and the tip of the stirring arm 8 via a turnbuckle 8b. As a result, the structure is not loosened. Further, a reinforcing plate 7a is attached to the through pipe 7 at a position orthogonal to the plate 8a of the through pipe 7.

On the other hand, as shown in FIG. 6, the rotating shaft 6 is rotatably supported by bearings 11 provided at a plurality of locations in the main body tank 1, and each bearing 11 is mounted on the main body tank 1 in the horizontal direction. Is fixed on the beam 12 bridged between the two. At the center of the bearing 11, a supply pipe 13 is provided which communicates with the inside of the bearing 11 and supplies an inert gas such as a solvent or N ₂ gas from the outside of the main body tank 1. Also,
A seal housing portion 14 is provided on each side wall of the main body tank 1 through which both ends of the rotary shaft 6 penetrate, for sealing the inside of the main body tank 1 in a liquid-tight manner. The seal housing portion 14 is provided with a supply pipe 15 that communicates with the central portion of the internal ground seal portion 14a and supplies an inert gas such as N ₂ gas from outside the main body tank 1.

At both ends of the rotating shaft 6, motors with reduction gears (driving devices) for rotating the rotating shaft 6 are provided.
16 are provided. In addition, the code | symbol 41 in a figure is the main body tank 1.
It is a bearing provided outside. As shown in FIG. 6, a nozzle 39 for supplying an inert gas such as N ₂ gas into the main body tank 1 is provided at the bottom of the main body tank 1 through an on-off valve (not shown). Many are provided at intervals. Further, as shown in FIG. 5 and FIG. 9, heating pipes (heating means) 40 independent of each other are provided in each of the sections 3 in the main body tank 1, and the temperature in each heating pipe 40 is controlled by a valve 40a. Is controlled independently by the That is, in the section 3 on one end 1b side of the main body tank 1, the heating pipe 40 is connected to the main body tank 1 in FIG.
The heating pipes 40 are arranged so as to heat only the inside of the section 3, and reach a steam trap 40 b provided outside the main tank 1. On the other hand, in the other sections 3, the heating pipes 40 are arranged on the left and right of the main body tank 1 in FIG. 5, and the heating pipes 40 are arranged so as to heat two adjacent sections 3. Steam trap 40b provided in
Has been reached. The heating pipe 40 is generally provided at the bottom of the tank in view of natural convection, but in the present embodiment, the rotating shaft 6 having the stirring blade 9 is provided in the horizontal direction. In order to stir the mixture sufficiently, it is provided above the main body tank 1 below the level of the volatile organic solvent R. Accordingly, there is no heating pipe 40 at the bottom of the tank where solid matter of the inorganic mineral or slurry that does not dissolve in the solvent such as rocks and soil precipitates, the precipitate is easily discharged from the main tank, and the heating pipe 40 is connected to the stirring blade 9. And can be installed in a simple tube sheet format shown in FIG. 5 (b).

As shown in FIGS. 1 and 2, a discharge tank 19 whose upper part communicates with the closed space S is provided at the other end 1c of the main body tank 1 via a partition wall 18 having an overflow gate 17. Have been. In the lower part of this dividing wall 19,
A slit similar to the partition walls 2a and 2b shown in FIGS. 3 and 4 is formed. A discharge port 20 is provided at the bottom of the discharge tank 19, and a discharge valve 21 (see FIG. 9) is attached to the discharge port 20. Further, as shown in FIG. 9, the opening of the discharge valve 21 is adjusted by a signal from a level meter 22 provided in the discharge tank 19 to adjust the liquid level of the discharge tank 19 to a predetermined level. Is provided.

Further, an overflow pipe 42 having one end attached to the upper part of the side wall of the discharge tank 19 and communicating with the sealed space S, and the other end communicating with the pipe 28 downstream of the discharge valve 21.
Is provided. The overflow pipe 42 allows the extraction processing liquid to flow from the discharge tank 19 to the downstream side through the overflow pipe 42 when a trouble such as a failure of the control device 23 or a blockage of the discharge valve 21 occurs. Even when light impurities such as wood chips and the like which are mixed into the asphalt-containing mineral as the raw material and float on the volatile organic solvent R accumulate in the discharge tank 19, the discharge tank 19 is downstream from the discharge tank 19 via the overflow pipe 42. It is intended to flow to. Therefore, the volatile organic solvent R in the discharge tank 19
Is usually controlled by the controller 23 so as to be lower than the one end position of the overflow pipe 43. In addition, a vertical stirrer 19b driven by a motor 19a is provided in the discharge tank 19 to stabilize the discharge concentration.

Then, downstream of the discharge valve 21,
As shown in FIGS. 8 and 9, a closed rotary screen 25 is provided. The rotary screen 25 is used for solid-liquid separation of a slurry containing the processed solid residue and the processing liquid discharged from the discharge valve 21 to remove the solid residue that is not extracted. Is provided with a screen 27 driven to rotate by a motor 26. This screen 2
Numeral 7 is a cylindrical body formed by a plurality of wedge wires arranged at intervals of about 5 mm in the circumferential direction, and is rotatably provided with its axis inclined. Below the screen 27, a tank 30 for temporarily storing the processing liquid flowing down between the wedge wires is formed.
Is integrated with the upper end of the tank 30.

On the other hand, into the opening above the screen 27, the pipe 28 for supplying the slurry sent through the discharge valve 21 is introduced. The solid residue falling from the opening below the screen 27 is:
Rotary valve 2 from hopper formed on the side wall of tank
The rotary screen 25 is taken out from the discharge pipe 29 through 9a while maintaining the airtightness of the rotary screen 25.

A solvent supply port 31 is provided at the bottom of one end 1b of the main body tank 1, and is inserted above the one end 1b to a position below the level of the volatile organic solvent R stored therein. A solid material feed chute 32 is provided. Further, an inert gas supply nozzle 33 (FIG. 9) for supplying an inert gas to the closed space S is provided above the main body tank 1.
See).

On the other hand, a dome 34 is provided above the other end 1c of the main body tank 1 for discharging the solvent vapor in the main body tank 1 and the vaporized water in the solid raw material. The dome 34 has a large-diameter base end 34a and a base end 34a.
Is formed by a dome portion 34b whose diameter is gradually reduced, and a steam discharge port 35 is formed at the top of the dome portion 34b. And this steam outlet 3
As shown in FIG. 9, a condenser 36 for condensing the discharged steam and a decanter 43 for separating the solvent from the condensate by utilizing a specific gravity difference are provided downstream of the decanter 5, as shown in FIG. The solvent separated at 43 is returned to the main tank 1 again by the transfer pump 37 via the return line 38.

That is, in this embodiment, as shown in FIG. 9, a perforated plate 43a and a partition wall 43b having a common upper space are provided in the decanter 43, and the condensate from the condenser 36 is divided into one end. , And is allowed to stand still to be separated into water and solvent layers, and only the upper layer solvent overflows the partition wall 43b to reach the other end section. Further, the decanter 43 adjusts the opening degree of the discharge valve 45 provided in the return line 38 on the discharge side of the transfer pump 37 by a signal from a level meter 44 provided in the other end section of the decanter 43 to control the decanter. 43
A control device 46 for maintaining the solvent liquid level in the other end section of the decanter 43 at a predetermined position is provided, and a discharge side of a drain pump 48 is Discharge valve 4 provided in
A control device 50 is provided for adjusting the opening of 9 and maintaining the aqueous layer liquid level in the intermediate section of the decanter 43 at a predetermined position.

Then, on the upper part of the decanter 43,
Exhaust pipe 51 communicating with the upper space in the decanter 43
The exhaust pipe 51 communicates with a seal pot 52 which is a gas sealing means. While maintaining the internal pressure of the main body tank 1 and the decanter 43 at a predetermined pressure, the steam in the main body tank 1 is condensed by the condenser 36. Upon cooling, a gas such as an inert gas that cannot be condensed is discharged. That is, the tip of the exhaust pipe 51 is introduced into the seal water stored in the seal pot 52 at a predetermined depth, and when the pressure of the exhaust pipe 51 becomes higher than the water head height, the inert gas is removed. And other gases are discharged out of the system.

Although not shown, in the above-mentioned closed rotary screen 25, an exhaust pipe is provided in a cover 25a for closing the screen 27, and gas sealing means similar to the seal pot 52 is separately provided. Thereby, the condenser 36 and the decanter 43 are interposed in the exhaust pipe. Alternatively, the exhaust pipe provided on the cover 25a is connected to the upstream side of the condenser 36, and the condenser 3
6. The decanter 43 and the seal pot 52 are commonly used.

Next, the operation of extracting the asphalt from the asphalt-containing mineral by using kerosene as a volatile organic solvent by the extraction device having the above configuration will be described. First, kerosene is supplied into the main body tank 1 of the extraction device from the solvent supply port 31 to a predetermined level below the upper portions of the partition walls 2a and 2b.
Through 50.degree.-150.degree. C., preferably 8
The temperature is maintained in the range of 0 to 120 ° C, more preferably 100 to 105 ° C. For safety, nitrogen (N ₂ ) gas is injected from the supply nozzle 33 into the closed space S above the liquid level of kerosene, and the sealed space S is set to 1.0 to 1.5 atm.
pa [abs] to 147 kpa [abs] {preferably 1.0 to 1.05 atm} 98 kpa [abs] to 10
In order to maintain a pressure of 2.9 kpa [abs]}, it is more preferable that the pressure is 100 mmAq (H
₂ O) Adjust so that pressure around [980 Pa] is always applied.

Then, the motor 16 with the transmission is driven,
By rotating the rotating shaft 6 at a predetermined number of rotations, the asphalt-containing mineral as a raw material is charged from the solid material charging chute 32 while the inside is stirred by the stirring blades 9 and the stirring rods 10 of the stirring arm 8. At this time, regarding the pretreatment of the asphalt-containing mineral, the raw material having an asphalt content of 15% or less is often rock (asphalt rock). In this case, the maximum particle size varies depending on the excavation method, but it is crushed to about 0.1 to 10 mm by a general crushing machine such as an impact crusher. In addition, raw materials having an asphalt content of 20% or more are often contained in relatively soft rocks (e.g., marble limestone and soft sandstone) and powders (e.g., lime-based dust and silt). In this case, similarly, the maximum particle size differs depending on the excavation method, but a special crusher such as a crusher for asphalt pavement recycle material, for example, in order to directly feed into the extraction device or to perform stable quantitative supply by, for example, an apron feeder. Crushed to 50 to 60 mm or less.

When the pretreated asphalt-containing mineral is charged into the main body tank 1 and the rotating shaft 6 arranged in the horizontal direction is rotated, the stirring blade 9 removes the asphalt-containing mineral and the solvent. The inside is agitated by frying from the bottom. At this time, the bearing 11 is composed of the asphalt-containing mineral and the solvent by continuously applying an inert gas or a fresh solvent to the bearing 11 from outside the main body tank 1 through the supply pipe 13 while applying pressure. Prevent slurry from entering. Further, an inert gas is injected from the supply pipe 15 into the ground seal portion 14a of the rotating shaft 6 that penetrates the main body tank 1, thereby maintaining the sealed state.

As a result, the inside of the tank made of a mixed slurry of the asphalt-containing mineral and the solvent is moved by the inclination of the stirring blade 9 through the alternately left and right gates 4a and 4b provided on the partition walls 2a and 2b. One end 1b in the main body tank 1
And meandering toward the other end 1c. As a result, a sufficient extraction time is secured. At this time, light impurities such as wood chips and grass leaves contained in the asphalt-containing mineral that float on the solvent are also sequentially sent to the other end 1c side of the main body tank 1 through the gates 4a and 4b. go. The solid content of the inorganic mineral or the precipitated slurry that does not dissolve in the solvent such as rocks and soil and the like is formed by the rotation of the stirring blade 9 and the slits 5 formed in the lower portions of the partition walls 2a and 2b.
And moves to the adjacent section 3. In this way, the mixed slurry and the like gradually move from the section 3 on the one end 1b side to the section 3 on the other end 1c side of the main body tank 1 while being stirred by the stirring blade 9 and the stirring rod 10.

Incidentally, according to an experiment conducted by the present inventors, when a raw material having an asphalt content of 20% or more is put into a high-temperature (eg, 110 to 120 ° C.) solvent, it does not matter much about the particle size, and it is 5 to 10 minutes. It has been confirmed that a slurry is formed. In the case of asphalt rock having an asphalt content of 15% or less, when the particle size is around 10 mm, 1
It has been confirmed that a slurry is formed in 0 to 20 minutes.
According to another test, the slurry was not completely extracted, and it was confirmed that the slurry was almost completely extracted at a solvent and a weight ratio of about 1: 1, at a temperature of 80 ° C. for 40 minutes. Therefore, asphalt can be completely extracted from the asphalt-containing mineral by setting the time from input to discharge to 1 hour or more.

With the above-mentioned extraction step, the enclosed space S
Vapors generated by vaporization of the water and the solvent in the asphalt-containing mineral are generated. However, since the enclosed space S is always maintained in a pressurized state by the nitrogen (N ₂ ) gas, the vapor or the gas is transferred from the dome 34 to the condenser 36. , Flows through the condenser 36 to be discharged out of the system via the decanter 43 and the seal pot 52. At that time, Dome 3
In 4, the linear velocity of the vapor discharge is reduced, and the solvent in the form of water drops falls, thereby preventing the entrainment of the solvent. Then, in the condenser 36, the solvent and the water vapor are cooled and condensed. This condensed liquid is separated by the decanter 43 into a water layer and a solvent layer using a specific gravity difference, and the separated solvent is returned to the main tank 1 from the return line 38 by the transfer pump 37 and reused. .
The non-condensable gas mainly composed of nitrogen (N ₂ ) gas that has not been condensed in the condenser 36 is discharged from the seal pot 52 through the decanter 43 to the outside of the system.

On the other hand, in the extraction step, the other end 1 of the main tank 1
The slurry that has moved to c and the suspended impurities are sent from the overflow gate 17 of the partition wall 18 to the discharge tank 19. The sediment, which is not dissolved, is sent to a discharge tank 19 through a slit provided at a lower portion of the partition wall 18.
The slurry and the sediment sent to the discharge tank 19 are almost uniformly stirred by the stirrer 19b, and the control device 23 opens the discharge valve 21 based on the detection signal from the level meter 22 of the discharge tank 19. By doing
It is withdrawn from the main tank 1. At this time, if light impurities such as wood chips mixed into the asphalt-containing mineral and floated on the solvent accumulate on the liquid surface of the discharge tank 19 with time, the upper surface of the side wall of the discharge tank 19 The discharge valve 21 is discharged from the discharge tank 19 through an overflow pipe 42 having one end attached thereto.
Overflow downstream.

Thus, the slurry containing the processing liquid discharged from the discharge valve 21, the processed residual solids, and the contaminants is sent to the hermetic rotary screen 25 through the pipe 28 and the motor 26. From the upper opening of the cylindrical screen 27 rotated by the screen 2
7 is introduced. Then, the solid residue and the contaminants are sent downward along the screen 27, and are taken out from the discharge pipe 29 via the rotary valve 29a while keeping the rotary screen 25 almost airtight. On the other hand, the liquid content containing the extracted asphalt is
, Flows down to the tank 30 from between the wedge wires, is separately extracted, and is sent to a centrifuge (not shown).

When the power of the motor 16 or the like is stopped due to a power failure or the like and the stirring by the stirring blade 9 is stopped during the extraction step in the main body tank 1, the slurry is separated and the solid content is reduced. Settles at the bottom of the tank. In such a case, when the power is restored and the operation is started again, an inert gas such as N ₂ gas is blown from a large number of nozzles 39 provided at the bottom of the main body tank 1 to fly up the precipitate. The mixture is again stirred by the container stirring blade 9.

As described above, according to the above-described extraction device, asphalt can be continuously and efficiently extracted from asphalt-containing minerals. At this time, the charging chute 32 of the solid raw material is inserted below the level of the volatile organic solvent R to prevent air from flowing into the upper closed space S of the main body tank 1 and to prevent the air from flowing into the closed space S. Supply the active gas,
Since the pressure is higher than the normal pressure, the inflow of air can be reliably prevented, and ignition or explosion due to static electricity or the like can be prevented.

Further, since the dome 34 is provided on the upper wall of the main body tank 1, when the solvent vapor or water vapor generated inside the main body tank is discharged from the vapor discharge port 35 at the top of the dome 34. In the dome 34, the linear velocity of the vapor discharge can be reduced, and the solvent in the form of water droplets can be again dropped into the main body tank 1, so that the entrainment of the solvent can also be prevented. In particular, when the asphalt-containing mineral having relatively high moisture content is subjected to the extraction treatment, the solvent vapor vaporized inside the main body tank 1 and the water vapor vaporized by the moisture in the solid raw material cause
Even when a large amount of steam is generated, the entrainment of the solvent in the space inside the dome 34 can be effectively prevented.

Further, in the discharge tank 19, the control device 23 controls the discharge valve 21 provided at the bottom of the discharge tank 19 so as to maintain the liquid level of the discharge tank 19 at a predetermined position. The extraction operation can be performed continuously while securing the required extraction time, and even if the asphalt-containing mineral treated material containing residual solids can be reliably discharged, the asphalt-containing mineral and kerosene can be discharged. (Solvent) can be continuously supplied and the processed product can be continuously discharged, so that stable continuous extraction can be performed. At this time, since a plurality of stirring rods 10 are attached to the stirring arm 8, the stirring rods 10 stir the asphalt-containing mineral in a floating state, thereby improving the stirring efficiency as a whole. be able to.

Further, since the motors 16 are provided at both ends of the rotating shaft 6, it is possible to reduce the required rotating torque for driving the rotating shaft 6 (torsion of the rotating shaft 6). Rotation shaft 6 to be arranged in the result body tank 1
Of the rotating shaft 6 can be further reduced.
Bearing 11 and seal housing portion 14 for supporting
Supply pipes 13 and 15 for supplying inert gas to the inside
Provided, the bearing 11 and the gland seal portion 1
The slurry can be prevented from entering the 4a.

Further, the stirring blade 9 is attached to the stirring arm 8 at an angle, and the stirring blades 9 are attached to the adjacent partition walls 2a, 2b.
Since the gates 4a and 4b are formed so as to be alternated on the left and right, the mixed slurry can be moved while meandering from the one end 1b side to the other end 1c side in the main body tank 1, thereby easily short-circuiting. A predetermined extraction time can be secured by suppressing the path, and continuous extraction can be reliably performed. At this time, the light contaminants floating on the solvent R are also moved from one end 1b of the main body tank 1 to the other end 1c, reach the discharge gate 19 from the overflow gate 17 provided above the partition wall 18, and finally discharge. The gas is discharged from the overflow pipe 42 provided in the tank 19 to the downstream side of the discharge valve 21. As a result, light impurities and sediments do not accumulate in the main tank 1 and are not blocked.

The partition walls 2a and 2b and the partition wall 18
A slit 5 having a large area in the rotation direction side of the stirring arm 8 is formed in the lower part of the tank, so that even if solids such as insoluble solids such as rocks and earth and sand settle on the bottom of the main body tank, stirring is performed. One end 1b to the other end 1c of the main body tank 1 as the blade 9 rotates.
To the discharge tank 19 through a slit provided in the lower part of the partition wall 18 and finally discharged from the discharge valve 21 to the outside of the system. There is no danger of depositing on the surface.

In addition, since a plurality of independent heating pipes 40 are provided for each section in the main body tank 1, each section 3 is extracted by controlling the heat medium flow rate of each heating pipe independently. In addition to being able to control the temperature to the optimum temperature and improving the function as a continuous extraction device, the solvent vapor generated inside the main body tank 1 is sent to the condenser 36, and the separated solvent is returned to the main body tank 1 again. , The organic solvent can be effectively used, and the economy is excellent. Also, this heating pipe 40
The rotating shaft 6 having the stirring blades 9 is provided in the horizontal direction and is sufficiently forcibly stirred, so that it is provided above the main body tank 1 below the liquid level of the volatile organic solvent R. Accordingly, there is no heating pipe 40 at the bottom of the tank where solid matter of the inorganic mineral or slurry that does not dissolve in the solvent such as rocks and soil precipitates, the precipitate is easily discharged from the main tank, and the heating pipe 40 is connected to the stirring blade 9. And can be provided in a simple manner. Further, since a number of inert gas supply nozzles 39 are provided at the bottom of the layer of the main body tank 1, the power is stopped by a power failure or the like, the stirring by the stirring blade 9 is stopped, the slurry is separated, and the solid content is reduced. Is settled at the bottom of the tank,
Since the inert gas can be blown from the nozzle 39 and the precipitate can be sowed and stirred, the restart operation can be easily performed.

In the above embodiment, the case where the seal pot 52 is used as the gas sealing means has been described. However, the present invention is not limited to this. It may be constituted by a pressure control device composed of a valve or the like. Further, in the above-described embodiment, the example in which the overflow pipe 42 is provided is shown. However, when the overflow pipe 42 is not provided, the closed space S and the outside of the main body tank 1 are located at the bottom of the discharge tank 19. The asphalt-containing mineral and kerosene (solvent) are continuously supplied without communicating through the discharge valve 21 provided, and as a result, the sealed state of the sealed space S is maintained. Can be discharged.

Further, in the above-described embodiment, the closed space S is formed by inserting the charging chute 32 to a position below the liquid level of the solvent R. However, if a large amount of inert gas is supplied, it is necessary to particularly seal the space. There is no. Further, in the above-described embodiment, only the case where the present invention is applied to a continuous-type extraction device has been described. However, the present invention is not limited to this.
It is also applicable to a batch type extraction device. Further, the solid raw material is not limited to the above-mentioned asphalt-containing mineral, and can be applied to extraction operations from various solid raw materials.Also, as a volatile organic solvent, in addition to the above-mentioned kerosene, light oil, gasoline, naphtha, Trichloroethane and the like can be suitably used.

[0073]

As described above, according to the extraction apparatus of any one of the first to fifteenth aspects, even if a volatile organic solvent is used for extraction from a solid raw material, the inflow of air is prevented. To prevent explosion due to static electricity, etc.
In addition, since the steam generated in the main body tank can be discharged, asphalt-containing minerals and the like containing insoluble solids and water can be efficiently extracted in large quantities with a high-temperature volatile organic solvent. Further, in particular, according to the extraction device of the second or fifth aspect, the solid raw material and the volatile organic solvent can be continuously supplied, and the processed product can be continuously discharged, so that continuous extraction is possible. become. Further, in addition to the above, according to the extraction device according to claim 1 or 2, it is possible to prevent the entrainment of the solvent, and according to the extraction device according to claim 5, light contamination floating on the volatile organic solvent. Extraction can be performed while discharging non-soluble solids that settle without dissolving in substances or volatile organic solvents.

According to the third aspect of the present invention,
By moving the contents in the tank from one end to the other end in the main tank through the opening provided in the partition wall, a short path is suppressed and a predetermined extraction time (degree of extraction) is secured. According to the invention as set forth in claim 4, even if the solid material or the solid content of the slurry precipitates, the sediment adjoins with the rotational movement of the stirring blade. Since it can be moved to a section, it does not accumulate in the tank.

According to the sixth aspect of the present invention, also in the fifth aspect of the invention, it is possible to prevent the entrainment of the solvent when discharging the steam generated inside the main body tank. According to the invention described in claim 7, the short path is achieved by moving the contents in the tank from one end to the other end in the main tank through the opening provided in the upper part of the partition wall. And a predetermined extraction time (degree of extraction) can be secured,
Continuous extraction can be reliably performed, and precipitates and light impurities floating on the volatile organic solvent can be similarly discharged from one end of the main tank to the other end.

According to the invention of claim 8, the precipitate such as insoluble solids can be smoothly moved to the adjacent section by the slit, and according to the invention of claim 9. For example, each section can be controlled to a temperature optimum for extraction by a plurality of heating means independent of each other corresponding to the section, so that the function as a continuous extraction device can be improved. According to the invention described in (1), it is possible to reliably prevent air from flowing into the upper space of the main body tank, thereby preventing ignition or explosion due to static electricity or the like.

Further, according to the eleventh aspect of the present invention, the internal stirring efficiency can be improved by the stirring rod. According to the twelfth aspect of the present invention, when the power is stopped due to a power failure or the like, In this case, the restart operation can be easily performed, and according to the invention described in the thirteenth aspect, the required rotation torque for driving the rotating shaft can be reduced, and the diameter of the rotating shaft can be further reduced. Is obtained. According to the invention as set forth in claim 14, a solid residue, which is an unextracted impurity, can be removed from a slurry containing the treated residue solids and the treatment liquid discharged from the discharge valve. According to the invention described in Item 15, the solvent can be separated and effectively used from the vapor containing the solvent generated inside the main body tank, so that the economy is excellent.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a main body tank in an embodiment of an extraction device according to the present invention.

FIG. 2 is a plan view of an end of FIG. 1;

FIG. 3 is a sectional view taken along line III-III of FIG. 1;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 1;

FIG. 5A is a sectional view taken along line VV of FIG. 1;
(B) is a partial plan view thereof.

FIG. 6 is an enlarged vertical sectional view of one end of FIG. 1;

7A and 7B show the stirring arm of FIG. 1, wherein FIG. 7A is a front view, FIG. 7B is a side view, and FIG. 7C is a left side view of FIG.

FIG. 8 is a front view showing a sealed rotary screen.

FIG. 9 is an overall configuration diagram of an embodiment of an extraction device according to the present invention.

FIG. 10 is a front view showing a conventional extraction device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body tank 1b One end of main body tank 1c The other end of main body tank 2a, 2b Partition wall 3 Section 4a, 4b Gate (opening) 5 Slit 6 Rotating shaft 9 Stirrer blade 10 Stirrer rod 11 Bearing 13, 15 Supply of inert gas Pipe 14 Seal housing part 14a Ground seal part 16 Motor with reduction gear (drive unit) 17 Overflow gate 18 Partition wall 19 Discharge tank 20 Discharge port 21 Discharge valve 22 Level gauge 23 Control device 25 Rotary screen 31 Solvent supply port 32 Solid raw material Injection chute 33 Inert gas supply nozzle 34 Dome 35 Steam outlet 36 Condenser 38 Return line 39 Inert gas supply nozzle 40 Heating pipe (heating means) 42 Overflow pipe R Volatile organic solvent S Closed space (space)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Naoki Kamata 1-9-3 Kamata Honcho, Ota-ku, Tokyo Inside the Niigata Ironworks Engineering Center Co., Ltd. (72) Inventor Kenji Yoshino Shinisogocho, Isogo-ku, Yokohama-shi No. 27 No. 1 F-term in the Niigata Iron Works Yokohama Plant (reference) 4D056 AB11 AC01 AC02 AC04 BA04 CA02 CA03 CA06 CA11 CA13 CA20 CA36 CA37 CA40 4H058 DA01 DA29 EA17 EA41 GA22 GA27 GA31

Claims (15)

[Claims] 1. A rotating shaft having stirring blades is provided in a horizontal direction in a main body tank in which a volatile organic solvent is stored and a space is formed above a liquid level of the volatile organic solvent. In a horizontal extraction device for stirring and extracting a solid raw material supplied into a main body tank in the volatile organic solvent, a chute for charging a solid raw material provided at an upper portion of the main body tank, and a vapor in the main body tank A dome provided on the top wall of the main body tank and having a diameter larger than that of the steam outlet and provided on an upper wall of the main body tank, for supplying an inert gas to the space. An extraction device comprising an active gas supply nozzle. 2. A rotary shaft having stirring blades is provided in a horizontal direction in a main body tank in which a volatile organic solvent is stored and a space is formed above a liquid level of the volatile organic solvent. In a horizontal extraction device that agitates and extracts the solid raw material supplied into the main body tank in the volatile organic solvent, a solvent supply port provided at one end of the main body tank, and an upper part of one end of the main body tank An input chute of the provided solid raw material, and a discharge tank provided at the other end of the main body tank through a partition wall formed with an opening through which the contents of the main body tank flows, and an upper part communicating with the space, A control device for adjusting the opening of a discharge valve provided at the bottom of the discharge tank by a signal of a level meter provided in the discharge tank to maintain the liquid level of the discharge tank at a predetermined position; Steam exhaust to exhaust steam inside A dome formed at the top of the top and having a diameter larger than that of the steam discharge port and provided on an upper wall of the main body tank; and an inert gas supply nozzle for supplying an inert gas to the space. An extraction device, characterized in that: 3. A plurality of partitions through which the rotating shaft penetrates and intersects the rotating shaft into a plurality of compartments, and a plurality of partitions communicating the spaces above each other in a direction crossing the rotating shaft. The extraction device according to claim 2, wherein a wall is provided, and each partition wall is provided with an opening through which a substance in the tank flows. 4. The stirring blade is attached to a stirring arm so as to move the contents in the tank from one end to the other end of the main tank with rotation of a rotating shaft. The extraction device according to claim 3, wherein slits are formed in a lower portion of the partition wall and a lower portion of a partition wall between the main body tank and the discharge tank. 5. A rotary shaft having stirring blades is provided in a horizontal direction in a main body tank in which a volatile organic solvent is stored and a space is formed above a liquid level of the volatile organic solvent. In a horizontal extraction device that agitates and extracts the solid raw material supplied into the main body tank in the volatile organic solvent, a solvent supply port provided at one end of the main body tank, and an upper part of one end of the main body tank The input chute of the provided solid raw material, an opening through which the substance in the main body tank flows is formed at the upper part, and a slit is provided at the other end of the main body tank through a partition wall formed at the lower part, and A discharge tank whose upper part communicates with the space, and the opening of a discharge valve provided at the bottom of the discharge tank is adjusted by a signal of a level meter provided in the discharge tank to adjust the liquid level of the discharge tank to a predetermined level. Control device to keep in position An overflow pipe having one end attached to the upper part of the side wall of the discharge tank and communicating with the space, and the other end communicating with the downstream side of the discharge valve, and an inert gas supply nozzle for supplying an inert gas to the space. The stirring blade is attached to the stirring arm so as to move the inside of the tank from one end to the other end of the main tank along with the rotation of the rotation shaft. Extraction device. 6. The main body tank is provided with a steam discharge port for discharging steam in the main body tank at a top portion thereof, and is formed to have a diameter larger than that of the steam discharge port to form an upper wall of the main body tank. 6. The extraction device according to claim 5, further comprising a dome provided in the extraction device. 7. A plurality of partitions through which the rotating shaft penetrates and intersects the rotating shaft into a plurality of sections in the main body tank, and which communicates the space with each other above. The wall is provided, and the opening part which distribute | circulates the inside of a tank is formed in the upper part of each partition wall, and the slit is formed in the lower part, The characteristic of Claim 5 or 6 characterized by the above-mentioned. Extraction device. 8. The extraction device according to claim 4, wherein the slit has a larger area on the rotation direction side of the stirring arm with respect to a vertical line passing through the center of the rotation axis. 9. The extraction according to claim 3, wherein the main body tank is provided with a plurality of independent heating means corresponding to the sections. apparatus. 10. The extraction apparatus according to claim 1, wherein the chute for charging the solid raw material is inserted to a position below a liquid level of the volatile organic solvent. 11. The stirring blade is attached to a tip end of a stirring arm provided substantially at right angles to the rotation shaft, and the stirring arm between the stirring blade and the rotation shaft is provided with:
The extraction device according to any one of claims 1 to 10, wherein a plurality of rod-shaped stirring rods are attached in parallel with the rotation axis. 12. The apparatus according to claim 1, wherein a plurality of nozzles are provided at a bottom portion of the main body tank and communicate with the inside of the main body tank from outside to inside to supply the inert gas into the main body tank. 12. The extraction device according to any one of items 11 to 11. 13. The extraction device according to claim 1, wherein a driving device for the rotating shaft is provided at each of both ends of the rotating shaft. 14. The extraction device according to claim 2, wherein a closed rotary screen is provided downstream of the discharge valve. 15. A condenser for condensing the discharged vapor and a decanter for separating a solvent from the condensed liquid by utilizing a specific gravity difference are provided downstream of the vapor discharge port. The separated solvent is
The extraction apparatus according to any one of claims 1 to 14, wherein the extraction apparatus is configured to be returned to the closed main body tank again via a return line.