JPS6031777Y2 - Granulation device for fine particles in a slurry mixture containing fine particles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for granulating fine particles in a slurry mixture containing fine particles such as pulverized coal into particles having an appropriate particle size.

Once pulverized coal with a particle size of about 100 to 200 mesh is made into a water slurry, even if you try to dehydrate it afterwards,
If it remains in a fine powder state, it can only be dehydrated to a moisture content of 30 to 40% (WB) even if a dehydrator such as a centrifuge or filter press is used.

There is also a method of drying using heat, but in the case of pulverized coal, there are problems with deterioration and explosion, making it impractical.

The present invention relates to an apparatus for shaping fine particles in a slurry mixture containing fine particles such as pulverized coal into particles of appropriate particle size.

Hereinafter, the present invention will be specifically explained with reference to embodiments shown in FIGS. 1 to 3.

1 and 2, 10 has an inlet nozzle 2 in the center of the bottom wall, and an outlet 13 and an outlet 11 in the upper wall.
4 is a cylindrical first inner cylinder installed concentrically inside the casing 10, and the lower end of the first inner cylinder 4 is connected to the inlet nozzle 2. It is fixed to the bottom wall of the casing 10 so as to surround it, and its inner and outer peripheral wall surfaces are textured as shown in FIG.

A cylindrical second inner cylinder 7 is disposed outside the first inner cylinder 4 and concentrically within the casing 10 at an appropriate distance, and the lower end of the second inner cylinder 7 is connected to the casing 10 It is fixed to the bottom wall of the housing, and its inner and outer peripheral wall surfaces are textured.

Reference numeral 15 denotes a rotating shaft that rotatably penetrates the center of the top wall of the casing 10 and extends concentrically into the first cylinder 4 of the casing 10. The stirring blade 3 is attached to the lower end of the rotating shaft 15. The rotating shaft 15 is driven and rotated by a drive source (not shown), and the stirring blades 3 move the slurry-like liquid mixture 1 containing fine particles that is press-injected from the inlet nozzle 2 to the inner periphery of the first cylinder 4. Particles are produced by colliding with a wall surface and raising the fine particles in the liquid mixture while rolling them along the inner circumferential wall surface.

In this case, the uneven portion (
(see FIG. 3) serves to promote the transfer of fine particles in the mixed liquid 1.

16 is a rotating cylindrical member which is disposed concentrically within the casing 10 and is composed of a disk-shaped top wall 17, a first cylindrical member 6, and a second cylindrical member 9; The center of the disc-shaped top wall 17 is fixed at a proper position on the rotating shaft 15, and the rotating cylindrical member 16 rotates within the casing 10 as the rotating shaft 15 rotates. .

The first flat member 6 of the rotating cylindrical member 16 has its upper end fixed to the disc-shaped top wall 17, and is located between the first cylinder 4 and the second cylinder 7 of the casing 10. They are hung concentrically and their inner and outer peripheral walls are textured.

Reference numeral 5 denotes a spiral blade attached to the inner peripheral wall surface of the first cylinder 4 side of the first cylindrical member 6, and the surface of the spiral blade 5 has unevenness similar to the front and back surfaces of the first cylinder 4. The slurry-like liquid mixture containing fine particles and granules (particles) that rises in the first cylinder 4 and turns over when it hits the top wall 17 of the rotating cylindrical member 16 descends. , has the function of granulating the fine particles in the liquid mixture into particles.

The second cylindrical member 9 has an upper end fixed to the lower surface of the outer peripheral end of the disk-shaped top wall, is suspended between the inner peripheral wall of the casing 10 and the second cylinder 7, and has an inner peripheral wall surface. A spiral blade 8 similar to that of the first cylindrical member 6 is attached thereto, and its inner and outer wall surfaces are textured as shown in FIG.

One embodiment of the device of the present invention is configured as described above, and when the device starts operating and a slurry mixed liquid 1 containing fine particles is pressurized through the inlet nozzle 2, the slurry mixed liquid The first is splashed around by the rotating stirring blade 3.
It hits the uneven inner circumferential wall surface of the cylinder 4 and rises along the inner circumferential wall surface.

As the slurry-like mixed liquid flows along the inner circumferential wall of the first cylinder 4, the fine particles in the mixed liquid are sequentially granulated into particles as they rise while rolling along the inner circumferential wall.

The slurry-like liquid mixture containing the granulated particles (granules) and fine particles that have not yet been granulated hits the top wall 17 of the rotating cylindrical member 16 and is reversed, causing the first cylinder 4 and the first cylindrical member to 6 and is transported downward by the spiral blade 5 while flowing along the outer peripheral wall surface of the first cylinder 4, the inner peripheral wall surface of the first cylindrical member 6, and the spiral blade 5. Next, the fine particles in the liquid mixture are subjected to a granulation action, and the fine particles in the liquid mixture are further granulated.

In this way, the slurry-like liquid mixture descending while being subjected to the granulation action hits the bottom wall of the casing 10 and is reversed, so that the slurry-like liquid mixture falls between the outer circumferential wall of the first cylindrical member 6 and the inner circumferential wall of the second cylinder 7. While rising, it is subjected to a granulation action by both members 6 and 7, and then it hits the top wall 17 and turns over, and is granulated by the outer circumferential wall of the second cylinder 7, the second cylindrical member 9, and the spiral blade 8. After descending while being subjected to a granulating action, it hits the bottom wall of the casing 10 and turns over, and while rising between the second cylindrical member 9 and the inner circumferential wall of the casing 10, it is further subjected to a granulating action, and then After being stored in the gutter-like member 14 through the discharge port 13, the granulated material 12 is taken out together with the liquid mixture from the take-out port 11.

The granules 12 are separated from the liquid and sent to the next step, and all or part of the liquid is transferred to the slurry mixed liquid 1.
will be returned to.

Since the device of the present invention has the above-described configuration and function, it is possible to granulate fine particles in a slurry mixture containing fine particles such as pulverized coal into particles having a desired particle size. This can be cited as a practical effect.

In the illustrated example, the first cylindrical member 6 and the second cylindrical member 9 are attached to the rotating cylindrical member 16, and the first cylindrical member 9 is attached to the casing 10.
Although an example has been shown in which two sets of the cylinder 4 and the second cylinder 7 are provided, one set or multiple sets are appropriately determined depending on the processing amount of the slurry mixed liquid, the properties of the fine particles, etc.

In addition, when a large number of sets of these members are provided, the peripheral speed of the cylindrical members forming the rotating cylindrical member becomes higher as the outer ones become faster. granulated.

[Brief explanation of the drawing]

The attached drawings are schematic illustrations of one embodiment of the present invention, in which Fig. 1 is a longitudinal sectional view, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 shows a first cylinder and a second cylinder. , is an enlarged view of an example of an uneven portion processed and formed on both the front and back surfaces of the first cylindrical member, the second cylindrical member peripheral wall, and the surface of the spiral blade. 1... Slurry mixed liquid, 2... Inlet nozzle, 3... Stirring blade, 4... First cylinder, 5... Spiral blade, 6...1st
Cylindrical member, 7... Second cylinder, 8...
Spiral blade, 9... Second cylindrical member, 10.
...Casing, 11...Ejection port, 1
2... Granules (particles), 14... Gutter-like member, 15... Rotating shaft, 16... Cylindrical rotating member, 17...・・・Disc-shaped top wall.

Claims (1)

[Scope of utility model registration request] A cylindrical casing with an inlet nozzle for a slurry mixture containing fine particles in the center of the bottom wall and an outlet in the upper side wall at a suitable location, and a stirring blade located concentrically within the casing and at the lower end. A rotating shaft driven and rotated in a predetermined direction by a driving source, a cylinder fixed concentrically within the casing so as to surround the rotating shaft, and a cylinder fixed at the center of the top wall at a suitable position of the rotating shaft, A rotating cylindrical member disposed inside a casing on the outside of the cylinder, and equipped with spiral blades on an inner circumferential wall surface for transporting a slurry-like liquid mixture containing fine particles downward. A device for granulating fine particles in a slurry mixture containing liquid.