JPS637858A - Crushing blade mounted conical shape slit basket type centrifugal dehydrator - Google Patents

Abstract

PURPOSE:To hold large treatment capacity and to enhance the dehydration efficiency of a raw material, by fixing a disc-shaped barrier plate having a plurality of crushing blades provided to the surface thereof to the bottom part of a rotor on the small diameter side thereof and arranging a pneumatic device for allowing the raw material to impact against the barrier plate. CONSTITUTION:An air feed fan 17 sucks air of the negative pressure chamber 30 in a casing to keep the negative pressure of the negative pressure chamber 30 and the product leaking from a slit rotor 2 is separated by a gas-water separator 26 and air is fed into an air feed pipe 13 under pressure from an emitting pipe 31. A raw material is fed forwardly by said air fed under pressure to be allowed to impact the central part of the rear surface of the barrier plate 3. The raw material allowed to impact collides with a first crushing blade 19 or a second crushing blade 20 at a high speed to be crushed and reaches the slit rotor 2 under stirring and mixing. The raw material is rearwardly moved along the inner peripheral surface of the rotor 2 while pressed to said inner peripheral surface by centrifugal force and separated water is discharged to the outside of the rotor 2 from a slit 18.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a conical slit basket type centrifugal dehydrator for dewatering granulated slag, coal, etc. Granulated slag is a granular glass material obtained by rapidly cooling and crushing molten furnace slag with a high-pressure water stream, and is used as a reinforcing material for cement or aggregate for concrete.

(Prior art and its problems) ． To explain a conventional dehydrator of this type using FIG. 1 of the present invention, the collision plate 3G provided at the bottom of the conical rotor 2 having the slit 18 was conventionally simply formed into a flat shape. A raw material is made to collide with this projecting plate 3 from a pneumatic pipe 13 to crush it, and at the same time, the rotor 1 separates the raw material from water.

However, when the collision plate 3 is flat as described above, the raw material crushing ability and the sharpening ability are low, and it is difficult to fully meet the user's requirement R1. On the other hand, it is possible to reduce the water replenishment rate by -L by reducing the treatment excitation for 1 hour, but
It is economically disadvantageous because the work efficiency is reduced.

(Objective of the Invention) An object of the present invention is to improve the dehydration rate of raw materials while maintaining the processing capacity of the large volume 9.

(Means for achieving the object) In order to achieve the above object, the present invention forms a large number of water outlet slits in a conical rotor, and a disk-shaped rotor at the bottom of the small diameter side of the rotor. In a conical slit basket type centrifugal dehydrator equipped with a 5A pneumatic feeder for supplying raw materials, a collision plate is fixed and coolant is collided with the collision plate. .

(Function) When the raw material colliding with the collision plate moves outward in the direction of rotation due to centrifugal force, it collides with the crushing blades and is crushed, and then reaches the rotor where it is separated from water.

Therefore, by crushing the raw material, the moisture inside the raw material can be efficiently discharged, and the dehydration rate is improved.

(Example) In FIG. 1 showing an overall vertical cross-sectional view of a conical slit basket type centrifugal dehydrator to which the present invention is applied, a conical rotor 2 is arranged in a casing 1,
The rotor 2 is formed so that its diameter increases toward the rear, and a disc-shaped collision plate 3 made of, for example, chrome steel is integrally provided at its front end (small diameter end). A large number of reinforcing ribs (also serving as auxiliary fans) 36 are formed on the outer circumferential surface of the rotor 2, and therefore the reinforcing ribs 36 function to suck out air from the inner circumferential side of the rotor 2 to the outer circumferential side.

Collision &3 is fixed to the returning end of a horizontal main shaft 5, and the main shaft 5 extends forward through the shell of the front wall of the casing 1.
It is rotatably supported by a bearing case 6 via a bearing 7. A driving V-pulley 10 is fixed to the iii7 end of the main @5, and the driving V-pulley 1o is driven by a belt transmission mechanism.
1l1l - interlockingly connected. The bearing case 6 is supported on a floor or the like via a support stand 8 and legs 9.

A partition wall (inward flange) 28 is formed on the inner circumferential surface of the casing 1 and extends from the outside in the radial direction to near the IDE edge of the rotor 2. A pressure chamber 3o is formed.

A water outlet chute 11 that opens downward is formed at the lower end of the negative I-mo chamber 30, and a product outlet chute 12 that opens downward is formed at the lower end of the casing on the side from the rear edge of the water heater 2. has been done.

A pneumatic pipe 13 for supplying raw materials enters the casing 1 from the rear, is aligned with the main shaft 5, and its front end opening is spaced apart from the collision plate 3. They are facing each other. A scattering prevention plate 14 extending radially outward is fixed to the outer peripheral surface of the front end of the pneumatic tube 13 . The rear pane opening of the air supply pipe 13 is connected to the air discharge pipe 3 of the ventilation fan 17.
1, and an upwardly directed raw material supply port 13a is formed on the upper surface of the entry portion of the pneumatic pipe 13, and a raw material supply chute (hopper) 15 is connected to the upper end of the raw material supply port 13a.

The suction part 17a of the blower fan 17 is connected to the negative pressure chamber 30 of the casing 1 via the suction pipe 27 and the steam/water separator 26, and the suction force of the blower fan 17 generates negative pressure in the negative pressure chamber 30. .

On the rear surface of the collision plate 3, there are a plurality of first,
Second crushing blades 19, 20 are fixed, these crushing blades 19, 20 being made of hard chromium steel, for example;
It protrudes rearward at a substantially right angle to the planar rear surface of the collision plate 3.

In FIG. 2 showing an enlarged view of Shunketsu (enlarged view in the ■ arrow direction) of the mouth/chittar 2 and the collision plate 3 in FIG. 1, the first and second crushing blades 19 and 20 each have four collision plates. It is formed into 3. The first crushing blades 19 are arranged at equal intervals in the circumferential direction on a circumference approximately one diameter of the front end of the pneumatic pipe 13, and the second crushing blades 20 are arranged at equal intervals in the circumferential direction. Feather 19J
: The rims are arranged at equal intervals in the circumferential direction on the outside h side in the radial direction. Further, the arrangement position of each second crushing blade 20 is between the first crushing blades 19 in the circumferential direction, so that each first crushing blade 19 and each second crushing blade 20 do not overlap each other in the radial direction. It has become. Ma1ζ each feather 19
, 20 are inclined with respect to the radial secant line passing through the tentative collision center so that the outer end in the radial direction is on the rotation direction R side.

A large number of slits 18 for draining water are formed over the entire surface of the mouthpiece 2. 2nd F! In order to simplify the drawing, the slit 18 is shown only in a part of the rotor 2, but of course the slit 18 is not formed in the rotor 2.

Next, the operation will be explained. As the raw material, vitreous granulated slag or coal, which is obtained by quenching and crushing slag from a blast furnace with a high-pressure water stream, is used, and is supplied into the pneumatic pipe 13 from the raw material supply chute 15 as shown by the solid line in Fig. 1. Zareru. On the other hand, the ventilation fan 7 17 is connected to the negative pressure chamber 30 inside the casing 1.
After sucking in the air and keeping the negative pressure in the negative positive chamber 30 at a negative pressure, and separating the product leaking from the venter 2 using the steam/moisture extractor 26, the air is forced into the pneumatic pipe 13 from the discharge pipe 31. do. The pressurized air sends the raw material forward and causes it to collide with the center of the rear surface of the collision plate 3.

The collided raw materials move outward in the radial direction in FIG. 2 at high speed due to the rotation of the collision plate 3, but are crushed and agitated by colliding with the first crushing blade 19 and the second crushing blade 20 at high speed. It reaches the slit port 2 while being rotated.

On the inner peripheral surface of the rotor 2, the raw material is pressed against the inner peripheral surface of the rotor 2 by centrifugal force and moves backward as shown by the solid arrow, and the separated water passes through the slit 18 to the rotor as shown by the broken arrow. 2 is discharged to the outside. Furthermore, since the outer side of the rotor 2 is a negative pressure chamber 30 and the reinforcing ribs 36 of the rotor 2 perform a suction action, the action of separating and discharging water from the raw material is performed even more effectively.

In addition, the scattering prevention plate 14 prevents the scattering of minor raw materials that tend to collect in the rotor medium heat, and the raw materials are pressed against the inner surface of the rotor.

The dehydrated product is then supplied to the product outlet chute 12 from the rear end opening of the rotor, while the moisture from the slit 18 is discharged from the moisture outlet chute 11 υF.

(Another Embodiment) (1) The number of blades 19 and 20 is not limited to four each, but is determined by considering the rotational speed of the main shaft 5.

(2) The shape of the blade, especially its inclination in the direction of rotation, can be varied depending on the size of the raw material, etc.

(Effects of the Invention) As explained above, the present invention provides a conical mouth 2
A large number of water discharge slits 18 are formed in the rotor 2.
A disk-shaped collision plate 3 is fixed to the bottom of the small diameter side of the collision plate 3.
In a conical slit basket type centrifugal dehydrator equipped with an air device (pneumatic pipe 13, etc.) that collides raw materials with
Since the plurality of crushing blades 19 and 20 are provided on the surface of the collision plate, there are the following advantages.

<<1>> The raw material collides with the crushing blades 19 and 20 during rotation, and is broken into fine pieces and stirred.
Moisture inside the raw material can also be efficiently removed, improving dehydration performance.

(2) Since the YA material collides with the crushing blades 19 and 20 and the raw material is stirred inside the rotor, the dewatering efficiency is further improved16.

(3) Move the blades 19 and 20 to the collision plate 3 as shown in FIG.
If the radial outer end is tilted toward the front side in the rotational direction with respect to the radiation passing through the rotation center, the crushing efficiency and dehydration rate of the raw material are further improved.

4. ra* explanation of the drawing

Claims (2)

[Claims] (1) A conical rotor with a large number of slits for water discharge formed in a conical rotor, a disc-shaped collision plate fixed to the bottom of the small diameter side of the rotor, and an air device that collides raw materials with the collision plate. A conical slit basket type centrifugal dehydrator characterized in that a plurality of crushing blades are provided on the surface of a collision plate. (2) The crushing blade according to claim 1, wherein the blade is inclined with respect to a radiation passing through the rotation center of the collision plate so that the outer end in the radial direction is on the front side in the rotation direction. Conical type slit basket type centrifugal dehydrator.