JPH042993Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an extraction device that separates a bitumen mixture such as asphalt paving material into aggregate and bitumen components using an organic solvent.

<Prior Art> Conventionally, extraction tests on bituminous mixtures such as asphalt paving materials have been carried out by either centrifugation or the Soxhlet method. Among these, in the centrifugal separation method, after putting the bitumen mixture into an extraction container, an organic solvent is manually injected, and a manual switch is used to rotate the centrifugal motor, and the bitumen dissolved in the organic solvent is transferred between the extraction container and the container. The aggregate and bitumen are separated by a filter paper inserted between the lids, and the bitumen containing organic solvent is discharged. After the first discharge of bitumen containing organic solvent is completed, the centrifugal rotation motor is turned off using a manual switch, brought to a rapid stop using a manual brake, and new solvent is injected. The process from injecting the organic solvent to stopping using the manual brake is repeated until the bitumen content disappears from the discharged organic solvent and bitumen. This operation usually takes more than ten times.

Next, the container containing the extracted aggregate is removed from the apparatus, and the aggregate is placed in a drying oven and dried until it reaches a constant weight. This work usually takes about 3 hours. Further, in parallel with the drying of the aggregate, the amount of filler contained in the discharged liquid containing the organic solvent and bitumen is quantified using a pressure filter using filter paper as the filtration medium and air pressure as the pressurizing force.

<Problems to be solved by the invention> However, in such conventional extraction operations for bitumen mixtures, the aggregates after extraction are placed in a drying oven and dried for a long time to remove the organic solvent contained therein. It was necessary to remove it. This also includes problems such as complicated operation and prolonged exposure of workers to organic solvents that are harmful to the human body.

In view of these circumstances, it is an object of the present invention to provide a bitumen mixture extraction device that is capable of safely and reliably separating the organic solvent from the aggregate after the extraction operation in a short period of time.

<Means for Solving the Problems> To achieve the above object, the bitumen mixture extraction apparatus of the present invention comprises a container for storing the bitumen mixture, a solvent injection device for injecting an organic solvent into the container, and the container. A bitumen mixture extraction apparatus comprising a motor for rotating a bitumen mixture is characterized in that a heating device for heating the container is provided outside the container.

The present invention will be explained below based on the drawings.

FIG. 1 is a schematic diagram showing an example of the device of the present invention.

In the figure, a centrifugal container 1 is a container for storing a bituminous mixture, and is designed to be sealed by tightening a dedicated lid 2 with a tightening screw 4 via an O-ring 3. Preferably, a metal filter 5 is provided on the peripheral wall of the container 1. This metal filter is preferably a so-called laminated metal mesh filter. A filter with a filtration accuracy of about 0.5 μm is used. By using such a metal filter, the amount of filler flowing out is greatly reduced, and the operation of quantifying the amount of filler flowing out, which was previously considered essential, becomes unnecessary.

Incidentally, it is preferable that the lid 2 is also provided with a metal filter 5'.

Although any suitable motor may be used as the motor 6 for rotating the container, it is particularly preferable to use an inverter-controlled motor that can rotate forward or backward at any rotation speed.

The organic solvent injection cylinder 7 injects solvent from an organic solvent tank 8 through a solvent discharge valve 9.
The clamp 10 protects the cylinder from wobbling during centrifugal rotation, and when the cylinder is lowered, the solvent inlet at the tip of the cylinder and the solvent inlet 11 of the centrifuge container are at the same level.

The centrifugal container 1 is provided in an extraction chamber 17 that covers it, and a bituminous organic solvent solution extracted through a metal filter is led to a recovery tank 14 through a waste liquid outlet 12.

The waste liquid discharge port 12 is for discharging the extraction waste liquid.
As mentioned above, when bitumen recovery is required, the discharge valve 1
The waste liquid is stored in the recovery tank 14 via the drain valve 3 and into the waste liquid tank 16 via the discharge valve 15 when not needed. This storage tank can also be replaced with a solvent regeneration device.

The feature of this invention is that the heating device 1 is placed on the back side of the extract material 17.
It is at the point where 8 was set. The heating device may be any conventional heating device that can raise the temperature inside the container to the solvent evaporation temperature, and its type is not particularly limited. However, it is preferable to use an indirect heating method to avoid direct contact with the organic solvent, and to increase thermal efficiency using a fan or the like. Further, it is preferable to use a multistage setting of two or more stages, heating to around 40°C in the first stage, and heating to a solvent evaporation temperature of 80 to 100°C in the second stage or thereafter. The evaporation operation of the organic solvent is further promoted by the use of the metal filter and the use of the inverter-controlled motor. The evaporated and gasified organic solvent passes through the discharge port 12 and moves to the recovery tank 14 via the discharge valve 13. The gasified solvent is naturally cooled in the pipes and valves in between, and is liquefied and transferred to the recovery tank 14, but for safety reasons, it is preferable to provide air holes in the recovery tank 14.

<Effects of the invention> By using the device of the invention, it is possible to automatically dry the extracted aggregate after the extraction operation without moving the location, thereby achieving improved drying efficiency and safety. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an example of the device of the present invention. 1...Centrifuge container, 5...Metal filter, 6...
...Inverter control motor, 14...Recovery tank,
16... Waste liquid tank, 18... Heating device.

Claims (1)

[Scope of utility model registration request] A bituminous mixture extraction device comprising a container for storing a bitumen mixture, a solvent injection device for injecting an organic solvent into the container, and a motor for rotating the container, and a heating device for heating the container outside the container. An apparatus for extracting a bitumen mixture, characterized in that it is provided with a bitumen mixture.