JPH0741438B2 - Screw press type repulping equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a repulping apparatus for redissolving a dehydrated cake to remove impurities and recover an active ingredient having high purity, and particularly to the present invention. Aims to provide a screw press type repulping device which is easy to operate and can be continuously operated.

[Conventional technology]

As a conventional repulping apparatus, for example, a cleaning solution is injected into the cake passed through a filter press to wash the cake, and the cleaning solution is added to the cake on the suction box with a horizontal vacuum filter. Then, a repulping apparatus for washing the cake to obtain a highly pure cake is known.

[Problems to be solved by the invention]

However, in the device using the conventional filter press,
It is difficult to uniformly wash the cake in the sealed chamber with the washing liquid, and the washing operation must be repeated many times. Further, since the filter press operates in a badge type, it is not suitable for a process requiring continuous operability. Further, even a belt type vacuum filter is not suitable for a process because it operates in a badge type when repulping and suctioning.

[Means for solving problems]

Therefore, the present invention eliminates the above-mentioned conventional problems, and the gist of the present invention is to provide a feed blade in the peripheral surface of a screen drum that is rotatably mounted horizontally and that is close to the inner surface of the screen drum. In a screw press supporting a wound cone-shaped feed shaft, a blind washing cylinder and a raw material feeding hopper connected to this washing cylinder are arranged at the starting end of the screen drum, and the feed shaft has a small diameter side. A mounting shaft is provided on the axis concentric with the feed shaft, and the crushing blades inclined to have a feeding action on the mounting shaft at the bottom of the hopper and the mounting shaft in the washing cylinder are installed in the opposite direction to allow retention time. An inclined stirring blade is provided, and further, a jet of washing water is opened in the washing cylinder.

[Action]

The present invention is configured as described above, the raw material put into the hopper is crushed by the crushing blade at the bottom thereof and at the same time repulped by the washing water from the jet outlet, and then in the washing cylinder by the stirring blade. After being thoroughly stirred and washed, it is conveyed to the large diameter portion by the feed blade of the feed shaft and passed. That is, the washed cake is taken out from the other end of the drum screen having a large diameter, and the liquid can be separated and collected at the drum screen portion. The operations of crushing, stirring, washing, and filtering the raw materials are continuously performed. Therefore, this apparatus can be used in accordance with the production process of a chemical factory in which continuous operations are performed.

Hereinafter, the present invention will be specifically described with reference to the drawings.

〔Example〕

In the figure, reference numeral 1 is a screen drum horizontally rotatably mounted, 2 is a drive gear thereof, 3 is a pinion, and 4 is a drive shaft. Reference numeral 5 is a cone-shaped feed shaft supported in the screen drum, and 6 is a feed blade wound around the peripheral portion of the feed drum, the peripheral surface of which is close to the inner surface of the screen drum 1 and formed in a spiral shape.

Next, reference numeral 7 is a cleaning cylinder connected to the screen drum 1 and is configured as a blind cylinder, and a stirring blade 8 is provided inside. Reference numeral 9 is a hopper connected to the cleaning cylinder 7 for charging the raw material, and a crushing blade 10 is provided at the bottom of the hopper. Code 11
Is a mounting shaft of the crushing blade 10 and the agitating blade 8 described above.
Is the drive sprocket.

The crushing blade 10 is tilted so as to have a feeding action, and the stirring blade is tilted so as to have a feeding action in the opposite direction so that a residence time can be obtained. Next, reference numeral 13 is a cleaning water supply passage provided in the shaft core portion of the feed shaft, and 13a is opened in the cleaning cylinder 7 at its ejection port. The feed shaft 5 is input from the left side of FIG. 1, and the feed blade 6 is driven at a low speed of 0.1 to 0.4 rpm, and the crushing blade 8 and the stirring blade 10 are 50 to 100 rpm with a drive sprocket 12
It is driven at high speed. Further, in the one shown in FIG. 1, the crushing blade 8 and the stirring blade 10 are driven by the mounting shaft fitted in the feed shaft 5, but as shown in FIG. 2, they are driven separately from the feed shaft 5. A shaft 14 is provided and a crushing wing is attached to this.
10 and the stirring blade 7 may be attached. Even in this case, the cleaning water supply passage 13 and the jet port 13a are provided on the drive shaft 14 to achieve a compact structure. Reference numeral 15 is a support roller for the screen drum 1 and the cleaning cylinder 7.

In the apparatus configured as described above, the raw material supplied to the charging port 9 is crushed by the crushing blades 10 at the bottom at high speed, and then is sent toward the cleaning cylinder 7, where the cleaning material is discharged from the jet port 13a. Water is supplied, is strongly stirred while being washed by the stirring blade 8, and is then sent into the screen drum 1.
Then, the cloudy liquid is sent by the feed blade 6 while being gradually squeezed toward the large diameter portion of the feed shaft 5, separated into solid and liquid, and the liquid is collected through the mesh of the screen drum 1, and the cake is screen drum. It is taken out of the machine from the other end of 1.

This crushing / washing (repulping) / solid-liquid separation operation is carried out continuously, and is therefore most suitable for use in a treatment facility requiring continuity such as a manufacturing process in a chemical factory. Compared to a vacuum press, a screw press has a remarkably high overpressure that is comparable to that of a filter press, and has continuity not found in a filter press, and can be used in a wide range of fields.

〔The invention's effect〕

As described above, in the apparatus according to the present invention, the raw material charged into the hopper was crushed by the crushing blades provided with the feeding action, and sufficiently stirred and washed by the stirring blades while taking a residence time in the blind washing cylinder. After that, since the material is conveyed to the screen drum, it is possible to continuously perform the operations of crushing the raw material, washing with stirring, and passing.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a screw press type repulping apparatus to which the present invention is applied, in which a part thereof is further broken away. FIG. 2 is a vertical sectional view of another embodiment of the repulp portion. 1 screen drum, 5 feed shafts, 6 feed blades, 7 cleaning cylinders, 8 stirring blades, 9 hoppers, 10 crushing blades, 11 mounting shafts, 13a
Spout

Claims (1)

[Claims] 1. A screw press for supporting a cone-shaped feed shaft 5 in which a feed blade 6 is wound around a peripheral surface of a screen drum 1 which is horizontally rotatably mounted and which is close to the inner surface of the screen drum 1. A blind cleaning cylinder 7 and a raw material feeding hopper 9 connected to the cleaning cylinder 7 are provided at the starting end of the drum 1, and the feed shaft 5 is mounted on the same axis as the feed shaft 5 on the small diameter side. A crushing blade 10 provided with a shaft and inclined to the mounting shaft 11 at the bottom of the hopper 9 so as to have a feeding action, and a stirring blade tilted in the opposite direction to allow the residence time on the mounting shaft 11 in the cleaning cylinder 7 And a screw press type repulping apparatus in which the washing water jet nozzle 13a is opened in the washing cylinder.