JPS5846156Y2 - Waste paper pulp deinking equipment - Google Patents

Description

[Detailed explanation of the invention] This invention diffuses air bubbles by convection in the aquarium.
The present invention relates to an improvement of a deinking device that efficiently deinks waste paper pulp.

When recycling waste paper pulp, various types of waste paper are added to a cooking solution containing soda ash, caustic soda, sodium sulfite, etc., and then steamed to remove oil and fat components such as ink that adhere to the waste paper, and at the same time remove the oil and fat components from the processing solution. Injecting countless microscopic air bubbles into;
A method has been used in which separated oil and fat components such as ink are attached to air bubbles and guided onto the surface of the processing liquid to be collected.

In this case, an important requirement for the deinking operation is to diffuse sufficiently fine bubbles into the deinking water tank in order to efficiently attach the deinking components to the bubble surface.

Therefore, the inventor first proposed a deinking device for waste paper and pulp, in which a bubble diffusion plate a was installed at the bottom of the deinking water tank, and a water case b containing a drive motor inside was installed on the bubble diffusion plate a. Utility Application No. 50-175488).

This deinking device sends air bubbles from the outside into a diffusion plate a, and further diffuses the air bubbles into a deinking water tank using a stirring blade C provided in the diffusion plate a, thereby efficiently deinking ink adhering to waste paper pulp. This is done in a specific manner.

However, in the above device, the drive shaft of the stirring blade C is connected to the drive motor in the honey case b via the seal member d, and on the other hand, the processing liquid contains not only oil components such as ink but also clay, clay, fine fibers, etc. Convection flows through the deinking water tank in a state containing clay, clay, etc., which is contained during the process.
Fine fibers and the like are forced into the gap between the suitable sealing material d by convection and become clogged.

As a result, there was a drawback that the sealing member d was worn out and could no longer exhibit its sealing effect.

This invention proposes a waste paper pulp deinking device that improves the above-mentioned drawbacks.

This invention will be explained below based on the illustrated embodiments.

FIG. 2 shows an embodiment of this invention, in which a bubble diffusion plate 4 consisting of an upper plate 2 and a lower plate 3 is installed at the bottom of the deinking water tank 1.

The bubble diffusion plate 4 has a liquid passage 5 between the upper plate 2 and the lower plate 3,
In addition, a liquid inlet 6 is formed in the center of the upper plate 2.

In addition, a bubble feeding lower is formed in the center of the lower plate 3.

Reference numeral 8 denotes a bubble pipe that sends air bubbles into the deinking water tank from a pump 9 provided outside the deinking water tank. is bent into a rising shape to form a vertical portion 8b, the tip of which is passed through the bottom of the deinking water tank 1 and connected to the air bubble feeding lower formed on the lower plate 3.

Further, a stirring blade 10 is provided between the upper plate 2 and the lower plate 3 of the bubble diffusion plate 4.
Further, the drive motor 11 of the stirring blade 10 is installed below the horizontal portion 8a of the bubble tube, and the drive shaft 12 of the stirring blade 10 is passed through the vertical portion 8b of the bubble tube to connect the drive motor 11 of the stirring blade 10 to the horizontal portion 8a.
Further, a seal member 13 is provided around the drive shaft 12 of the protrusion, a bearing 14 such as a bearing is provided below the seal member 13, and the tip of the drive shaft 12 is connected to the drive motor 11. Configure to connect.

This device has the above-mentioned configuration, but when performing deinking operation, waste paper pulp and a cooking liquid such as soda ash, caustic soda, and sodium sulfite are added to the deinking water tank, and the stirring blade 10 is activated by the drive motor 11. While rotating, air bubbles are sent into the deinking water tank 1 from a pump 9 provided outside the deinking water tank.

The bubbles sent into the deinking water tank are injected toward the stirring blade 10 from a bubble feeding lower.

On the other hand, as the stirring blade 10 rotates, the processing liquid in the deinking water tank flows into the liquid passage 5 through the liquid inlet 6 formed in the upper plate 2, and is deinked again from the outlet 15.15 of the liquid passage 5. The air bubbles flow into the ink water tank and undergo convection within the tank, but the air bubbles injected toward the stirring blade 10 as described above are immediately dispersed into fine particles by this convection into the deinking water tank. At the same time, oil and fat components such as ink adhere to the surface to exert a deinking effect.

In the deinking process described above, no processing liquid is present inside the bubble tube 8 during the process due to the air pressure feeding action from the pump and the suction action due to the rotation of the stirring blade.

However, when the process is stopped and the pump and motor are stopped, the process liquid flows into the bubble tube 8.

Therefore, the seal member 13 only needs to support the drive shaft 12 when the drive shaft 12 is rotating, and maintain watertightness when the drive shaft 12 is stationary. It may be of a structure.

Further, since the processing liquid does not come into contact with the sealing member 13 when the drive shaft 12 rotates, the sealing member is not clogged with clay, clay, fine fibers, etc. contained in the processing liquid.

As described above, according to the present invention, the motor for driving the stirring blade is installed outside the deinking water tank, and the drive shaft connected to the motor is passed through the vertical part of the bubble tube to face the inside of the water tank. Not only is the sealing member of the drive shaft extremely simple, but there is no need to use an expensive underwater motor, so a low-mounted deinking processing apparatus can be provided.

Furthermore, since the stirring blade is located at the bottom of the water tank to effectively generate bubbles, the efficiency of the deinking process is extremely high, and the ink-containing bubbles on the liquid surface can be easily removed with a scraper or the like.

[Brief explanation of the drawing]

FIG. 1 is a vertical side view showing a conventional deinking device, and FIG. 2 is a vertical side view showing an embodiment of this invention. In the figure, 1 is a deinking water tank, 4 is a bubble diffusion plate, and 8 is a bubble 8a is the horizontal part of the vial, 8b is the vertical part of the vial, 10 is the stirring blade, 1
1 is a drive motor, 12 is a drive shaft.

Claims (1)

[Scope of utility model registration request] In a deinking device for waste paper pulp, a stirring blade is arranged in a water tank, a bubble inlet is provided below the stirring blade, a bubble tube is piped below the bottom of the water tank, and the tip is connected to the inlet,
The drive shaft of the stirring blade is passed through the bubble tube, the tip is projected outside the bubble tube and connected to the drive motor, and a sealing member is provided around the drive shaft of the protrusion. Deinking equipment.