JPS594450A - Grinder equipped with rotary press type separator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a pulverizer having a pulverizing roller on a rotary table that rotates as a result of rotation of the rotary table.
This invention relates to a pulverizer equipped with a rotary pressurized separator with an improved material supply structure.

In a pulverizer that pulverizes coal, a separator is installed on the top of the pulverizer, and the pulverized material is classified according to its particle size.

However, conventional crushers such as boilers have been pressurized types with high internal pressure, and separators have been of fixed vane type.

This fixed vane type separator has poor classification efficiency and cannot classify fine particles. For example, for 1 coal, 200
The mesh pass is limited to 80-85%.

Therefore, when trying to increase classification efficiency by adopting a conventional rotary separator, the conventional rotary separator is applied to negative pressure mills, so if you try to install it in a pressurized crusher, the fine powder will fall off the bearings. and damage the bearing mechanism.

An object of the present invention is to provide a rotary pressurized separator that can be applied to a pressurized mill.

In order to achieve the above object, in the present invention, a raw material feeding seat and a rotary cylinder to which a rotor is fixed are arranged concentrically, and 7-air is jetted downward between the two. We adopted a structure that allows

The present invention will be described in detail below based on an embodiment shown in one drawing.

FIG. 1 shows an embodiment of the present invention.

In this figure, the reference numeral 1 indicates a tower-shaped crusher casing, and a rotary table 2 is disposed at the base of the casing 1. As shown in FIG.

A plurality of crushing rollers are rotatably supported on the rotary table 2 by a rotary shaft 5 at a slight distance from the liner 4 of the rotary table 2.

This rotating shaft 5 is rotatably supported on the frame of the crusher via an arm 6, and is swingably attached to a shaft 7. The arm 6 has one end rotatably connected to the tip of the rod 9 of the cylinder 8 as shown by the chain line, and when the pressure cylinder 8 is actuated, the arm 6 is rotated and the rotation table of the crushing roller is rotated. I am facing 2.

That is, the pressing force against the crushed material held between the nine-turn table 2 and the crushing roller filter is adjusted.

The crushing effect can be made different.

Further, the arm 6 has an arm 6a that is bifurcated at one end, and the tip of the arm 6a is supported by a buffer 11 fixed on a support plate 1o located approximately in the center of the crusher frame. It is now possible to do so.

A rotary pressure type separator 12 of the present invention is disposed above the crushing roller 6.

FIG. 2 is a schematic diagram showing the main parts of the rotary pressurized separator of the present invention.

The rotary pressurized separator 12 is composed of a large-diameter cylindrical center sheet 1 which is arranged vertically and has an open bottom end, and a rotating cylinder 22 having a radially arranged plate 714 on the outside of the center chute 13. There is.

A rotary cylinder 22 having a vane 14 rotating nine times is attached to the outside of the center chute 13 arranged.

The rotary cylinder 22 has an open lower end, and a large diameter belt pulley 17 is fixed to the outside thereof.
is rotated by a bell) 19a stretched between a small-diameter belt pulley 19 fixed to the output shaft 18a of the motor 18.

20 is a bearing, and 21 is an oil seal that prevents grease from leaking.

In FIG. 2, 15 is a blower, and 16 is an air conduit.

Air at a predetermined pressure is supplied from the blower 15 between the rotary cylinder 22 and the center chute 13 for feeding raw materials.

This air passes through the gap between the nine-rotation cylinder 22 and the center chute 13 and is ejected from the lower end toward the upper surface of the crushing roller 6.

Since the present invention is configured as described above, air at a predetermined pressure is always ejected from the lower end of the rotary cylinder 22, even when used in a crusher in a pressurized atmosphere.

Fine particles of the crushed material are blown away.

It does not enter the bearing 27 side and the bearing part is not damaged, which is an excellent effect.

Furthermore, according to an experiment of the present invention, when the above rotary pressurized separator was operated, fine powder could be classified to about 60 to 99% in 200 mesh passes.
It became clear that the classification efficiency was significantly improved.

By the way, the rotary pressurized separator of the present invention is as follows.

The number of rotations, that is, the nine classification points, can be freely changed by changing the number of rotations of a variable speed motor in a central control room (not shown). It will be done.

As is clear from the above description, according to the present invention.

The rotary cylinder 22 to which the vanes 21 are attached and the center chute 13 for feeding raw materials are arranged concentrically, and air at a predetermined pressure is jetted downward from the gap between the two, so that the material inside the crusher is can blow away fine particles,
No particles of material will enter the bearing, and no damage to the bearing will occur.

Therefore, it can be easily attached to a crusher in a pressurized atmosphere.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of a pulverizer equipped with a rotary pressure separator of the present invention, and FIG. 2 is a schematic diagram showing the main parts of the rotary pressure separator. 1 is the casing of the crusher, 2 is the rotary table. B is a crushing roller, 4 is a rotary table liner, 5 is a rotating shaft, 6 is an arm + 6a is a bifurcated arm, 7 is a shaft, 8 is a cylinder, 9 is a rond, and 10 is a support plate. 11 is a shock absorber, and 12 is a rotary pressure type separator. 13 is a center chute, 14 is a vane, 15 is a blower, 16 is an air conduit, 17 is a large diameter belt pulley, 1
8 is a motor, 18a is an output shaft of the motor, 19 is a small-diameter belt boot'J, 19a is a belt, 20 is a bearing, 21 is an oil seal, and 22 is a rotating cylinder. Patent applicant: Ube Industries, Ltd. Figure 1 Figure 2

Claims (1)

[Claims] It has a rotary table and a plurality of crushing rollers that rotate as a result of the rotation of the rotary table placed on the rotary table. A rotating cylinder is installed concentrically outside the center chute, and vanes arranged radially are attached to this rotating cylinder, so that the nine rotating cylinders can be rotated at a predetermined level by a power device via a belt. In the configured crusher, an air conduit connected to the blower is attached to a predetermined position of the one-rotation tube, and the gap between the rotor and the center chute is communicated with the blower, and air at a predetermined pressure is blown into this gap. A pulverizer equipped with a rotary pressurized separator characterized in that the separator is configured to eject from the lower end of a rotating cylinder.