JPS5942087Y2 - Shitsukuna - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a thickener that can efficiently treat pulp that has a slow sedimentation rate and is difficult to separate from solid to liquid due to its small suspended particle size and particle specific gravity.

As shown in Figure 1, the conventional thickener has a short feedwall 6, and even if it is long, it is inserted into the liquid only at a depth of 40 mm, and the pulp flowing out from the bottom of the feedwall has a short distance to the liquid surface. There are problems such as the short pulp flow not being sufficiently diffused and causing local short passes and overflowing, and it is necessary to take measures such as reducing the amount of pulp to be processed, especially for pulp that is difficult to separate from solid and liquid. There wasn't.

The present invention provides a thickener that can easily and efficiently process even pulp with extremely poor settling properties.

Next, an embodiment of the present invention will be described with reference to FIG.

Reference numeral 1 denotes a sloped bottom surface of the thickener, a sediment drainage port 2 is provided in the center thereof, and a rake 4 having a large number of blades 3 (sludge collecting blades) on the lower side is arranged on the bottom surface 1. The rake 4 is configured to be horizontally rotatable by a drive shut 5 erected at its center, and is configured to scrape sediment deposited on the bottom surface 1 into the mud draining port 2 with the blade 3.

6 is a cylindrical feed wall whose upper end is above the liquid level and whose lower end extends downward to surround the shaft 5;
A wave-shaped, saw-blade-shaped, or other arbitrary deep cut 7 is uniformly formed on the lower edge of the rake 4, and the lower end is floated close to the center of the rake 4, or rotates together with the rake 4. Attach it to the center of rake 4 so that

Reference numeral 8 denotes a baffle plate erected on the rake 4 so as to surround the notch 7 at the lower end of the feedwall 6 at a constant interval from the outer periphery of the feedwall 6, so that the pulp supplied into the feedwall 6 is The angle and height are such that when the water flows out from the notch 7 at the lower end, it once collides with this baffle plate 8, and this baffle plate 8 is closely spaced with each other on the rake 4 so as to form one wall. or
A baffle plate 8 having a large diameter cylindrical shape is fixed on the rake 4.

Also, if necessary, the inside of the baffle plate 8 may be provided with a bottom along the slope of the rake 4.
Since a large number of notches 7 are formed at the lower end, the length of the periphery thereof increases, and the speed of the pulp flowing out from the lower end is reduced and the pulp is discharged from the lower end of the wall 6.

Next, the pulp collides with the baffle plate 8 erected around it, and becomes an upward flow and diffuses into the thickener without disturbing the precipitated concentrate at the bottom of the thickener. Therefore, according to the structure of the present invention, the feed wall Since the pulp fed into the slurry has a long distance to reach the liquid level, it does not make a short pass to the overflow port (not shown), and the pulp that collides with the baffle plate and rises and spreads is on top of the upper layer. When passing through the suspension layer between the clear liquid layer and the lower sediment layer, the liquid undergoes a flow action and is clarified.

As described above, the thickener of the present invention has an extremely simple structure and has the advantage of being able to easily process pulp with poor settling properties, which is difficult to separate from solid and liquid with conventional thickeners.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional thickener, and FIG. 2 is an explanatory diagram of a thickener according to the present invention. Explanation of symbols, 1...Bottom of thickener, 2...
...Sludge removal port, 3...Blade, 4...
・Rake, 5... Drive shaft, 6...
・Feedwall, 7... Cutting depth, 8...
...Baffle plate, 9...Mud supply pipe.

Claims (1)

[Scope of utility model registration request] 1. The lower end of the feed wall of the thickener is installed close to the center of a rotatable rake with a blade attached to the lower side, and cuts are uniformly formed on the periphery of the lower end of the wall, and the upper surface of the rake is A thickener characterized by having baffle plates erected so as to surround the lower end of a feedwall at regular intervals. 2. The lower end of the feedwall is floating directly above the center of the rake. 3. The lower end of the feedwall is attached to the center of the rake so as to rotate together with the rake. The thickener according to claim 1 of the utility model registration claim.