CN104785336A - Slime filter cake crushing device and method - Google Patents

Abstract

The invention relates to a slime filter cake crushing device and a method suitable for crushing slime filter cakes and clean coal filter cakes. The device comprises a power device and a crushing device, wherein the power device comprises a motor and a frequency converter; the motor is connected with belt drive which comprises a large belt pulley and a small belt pulley; the crushing device comprises a cylinder, an upper bearing pedestal support is arranged above the cylinder and a lower bearing pedestal support is arranged below the cylinder; a material feeding chute and a backup chute are respectively formed on two sides of the upper bearing pedestal support; a discharge opening is formed on the lower bearing pedestal support; a main shaft is connected between the upper bearing pedestal support and the lower bearing pedestal support through a bearing; the main shaft is located in the cylinder and is provided with a plurality of cutters which cut the input slime filter cakes into slime particles many times; the rotary speeds of the cutters of the main shaft can be adjusted by virtue of the frequency converter so as to change the granularity of the product. The device is compact in structure, simple to operate and wide in applicability on the slime filter cakes with great viscidity, is not blocked and is great in handling capacity of unit area and low in power consumption.

Description

A coal slime filter cake crushing device and method

technical field

The invention relates to a coal slime filter cake crushing device and method, in particular to a coal slime filter cake crushing device and method suitable for crushing coal slime filter cake and clean coal filter cake at the tail of a coal preparation plant.

Background technique

After being processed, some of the coal slime in the coal preparation plant must enter the filter press for dehydration and become a coal slime filter cake. This part of the coal slime has a high moisture content and high ash content. Many coal preparation plants adopt the method of drying on the floor. If the coal slime is sold on the ground or mixed with mixed coal, it will pollute the environment of the factory area greatly; when the coal slime is not sold smoothly, there will be nowhere to pile up a large amount of coal slime, which will seriously affect the normal operation of the coal preparation plant. Is it possible to develop a coal slime crusher to ensure no clogging, large processing capacity, and low energy consumption, and crush the coal slime to a certain fineness and mix it into blended coal or raw coal to facilitate sales.

In order to realize this idea, many developers have explored and practiced. The Chinese utility model patent multifunctional coal slime crushing feeder (CN203778136U) applied on February 14, 2014 adopts multiple sets of blades and Multi-set crank structure, online slime crushing; a Chinese utility model patent for a chain slime crusher (CN203764326U) applied on 2014.04.08, two rotor devices with chain shafts, chains, and spacer plates are installed in parallel for crushing Coal slime filter cake; a Chinese utility model patent applied on 2012.11.26, a horizontal coal slime crusher under the belt conveyor warehouse (CN202942938U), by setting the main shaft rotary knife in the crusher shell and the grate net assembly below it, Realize the crushing of coal slime; most of these slime crushers adopt double-roll or single-roll crusher structure, the difference is the shape of crushing teeth. The common problem is that the viscous coal slime will slowly fill the gap between the teeth, resulting in the inability to feed and lose the crushing function.

Contents of the invention

Technical problem: The purpose of the present invention is to overcome the deficiencies of the existing technology, to provide a conventional crushing device and method for breaking double-roller, single-roller, counterattack and hammer structures without using teeth, and to cut viscous slime filter cakes by using the kinetic energy of the high-speed rotating rod , A coal slime filter cake crushing device and method for completely solving the clogging problem.

Technical solution: In order to achieve the above technical purpose, the coal slime filter cake crushing device of the present invention includes a power device and a crushing device, the power device includes a motor and a frequency converter, the motor is connected to a belt drive, and the belt drive includes a motor shaft connected to The large pulley and the small pulley driven by the belt; the crushing device includes an upper bearing support on the top of the cylinder, a lower bearing support on the lower side, and inlets on both sides of the upper bearing support. material chute and spare chute, the center of the upper bearing seat is provided with an upper bearing seat, the lower bearing seat is provided with a discharge port, the center of the lower bearing seat is provided with a lower bearing seat, the upper bearing seat and The lower bearing seat is connected with a main shaft through a bearing, and the main shaft extends on the outer part of the cylinder body to connect with the small pulley of the power device, and a plurality of cutting knives are arranged at intervals on the main shaft inside the cylinder body.

The multi-layer cutting knives have 3-6 layers; the number of cutting knives for each layer is 8-24, and the section of the cutting knives is rectangular or diamond-shaped.

A method for crushing a coal slime filter cake using the above-mentioned device, comprising the steps of:

a. Adjust the frequency converter and start the motor, drive the main shaft to rotate through the belt drive, so that the multiple cutting knives set on the main shaft start to rotate;

b. Put the coal slime filter cake into the cylinder through the feeding chute, and the coal slime filter cake falls by gravity. During the falling process, it is cut and broken into small pieces by multiple cutting knives rotating at high speed. After uniform mixing, it finally passes through the Discharge from the outlet at the lower bearing seat support.

By adjusting the frequency converter, the speed of the rotary cutter can be changed to control the particle size of the coal slime filter cake that is broken into small pieces; when the number of motor revolutions remains unchanged, the number of layers of cutters and the number of cutters on each layer can be increased or decreased. The quantity controls the particle size of the coal slime filter cake broken into small pieces.

Beneficial effects: the invention drives the main shaft to rotate in the cylinder through the motor belt transmission, and the main shaft drives multiple pairs of cutters to rotate, and cuts the coal slime filter cake that is put into the cylinder through the feeding chute and falls freely, and is broken into pieces by multiple cuttings. After the small pieces are evenly mixed, they are finally discharged through the outlet of the lower bearing seat without blocking the cylinder and the outlet. By adjusting the speed of the motor or increasing or decreasing the number of cutters 8, the slime can be changed. The size of the fragments after the filter cake is cut, the size of the output particles can be easily adjusted, the processing capacity is large, the energy consumption is low, the maintenance is convenient, and the practicability is wide.

Description of drawings

Fig. 1 is the sectional structure drawing of the coal slime filter cake device of the present invention.

FIG. 2 is a top structural view of FIG. 1 .

In the figure: 1. Large pulley; 2. Small pulley; 3. Motor; 4. Upper bearing seat; 5. Feeding chute; 6. Upper bearing support; 7. Main shaft; Body; 10. Lower bearing seat; 11. Lower bearing seat support; 12. Frequency converter.

Detailed ways

An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

As shown in Figure 1, the coal slime filter cake crushing device of the present invention mainly is made of power unit and crushing device, and described power unit comprises motor 3 and frequency converter 12, is connected with belt transmission on the motor 3, and belt transmission comprises and The large pulley 1 connected by the motor 3 shafts and the small pulley 2 driven by the belt, the crushing device includes an upper bearing seat support 6 above the cylinder body 9, a lower bearing seat support 11 below, and an upper bearing seat support Both sides of seat 6 are respectively provided with feeding chute 5 and spare chute 13, the lower bearing seat support is provided with discharge port 14, the center of upper bearing seat support 6 is provided with upper bearing seat 4, and the center of lower bearing seat support 11 is provided with There is a lower bearing seat 10, and the upper bearing seat 4 and the lower bearing seat 10 are connected with a main shaft 7 through a bearing. Auxiliary cutter 8, said main shaft 7 is provided with 3～6 layers of cutters 8, each layer is provided with 8～24 cutters, and the section of the blade is rectangular or rhombus.

The coal slime filter cake crushing method of the present invention: adjust the frequency converter 12 and start the motor 3, the motor drives the main shaft 7 to rotate through the belt drive, so that the cutter 8 provided on the main shaft 7 starts to rotate; The coal slime filter cake is put in, and the coal slime filter cake falls by gravity. During the falling process, the high-speed rotating cutter 8 is cut and evenly mixed, and then broken into small pieces, and finally passed through the discharge of the lower bearing seat. port 14 out. By adjusting the frequency converter 12, the rotating speed of the rotary cutter 8 can be changed or the number of layers of the cutter 8 or the number of cutters per layer can be increased or decreased, thereby controlling the particle size of the coal slime filter cake broken into small pieces.

For thermal coal preparation plants, when there is the last raw coal product (or mixed coal) and the tailing coal filter cake is intended to be mixed, the last raw coal (mixed coal) can be put into the standby feed inlet 13, and the last raw coal (or mixed coal) is During the falling process, it realizes uniform mixing with the broken small filter cake and prevents the sticky small filter cake from sticking together.

Claims (6)

1. A coal slime filter cake crushing device is characterized in that: it includes a power unit and a crushing device, and the power unit includes a motor (3) and a frequency converter (12), and the motor (3) is connected with a belt drive, and the belt The transmission includes a large pulley (1) connected to the shaft of the motor (3) and a small pulley (2) driven by a belt; the crushing device includes an upper bearing seat (6) on the top of the cylinder (9), and an upper bearing seat (6) on the bottom. The lower bearing support (11) is provided, the feeding chute (5) and the spare chute (13) are respectively provided on both sides of the upper bearing support (6), and the center of the upper bearing support (6) is provided with The upper bearing seat (4), the lower bearing seat (11) has a discharge port (14), the center of the lower bearing seat (11) is provided with a lower bearing seat (10), and the upper bearing seat (4) and the lower bearing seat (10) are connected with the main shaft (7) through the bearing, and the main shaft (7) extends on the outer part of the cylinder (9) to connect the small pulley (2) of the power device, and is located in the cylinder (9) A plurality of cutting knives (8) are arranged at intervals on the inner main shaft (7). 2. The coal slime filter cake crushing device according to claim 1, characterized in that: said cutter (8) has 3-6 layers. 3. The coal slime filter cake crushing device according to claim 1 or 2, characterized in that: 8 to 24 cutting knives are respectively arranged on each layer of said cutting knives (8), and the section of the cutting knives is rectangular or diamond. 4. a coal slime filter cake crushing method using the device claimed in claim 1, is characterized in that, comprises the steps: a. Adjust the frequency converter (12) and start the motor (3), drive the main shaft (7) to rotate through the belt drive, so that the multiple cutting knives (8) set on the main shaft (7) start to rotate; b. The coal slime filter cake is put into the cylinder (9) through the feeding chute (5), and the coal slime filter cake falls by gravity. During the falling process, the high-speed rotating cutter (8) cuts and breaks into small pieces for many times, and finally Discharge through the discharge port (14) located at the lower bearing seat support. 5. The method for crushing coal slime filter cake according to claim 4, characterized in that: by adjusting the frequency converter (12), the rotational speed of the rotary cutter (8) can be changed to control the particle size of the coal slime filter cake broken into small pieces. 6. The method for crushing coal slime filter cake according to claim 4, characterized in that: in the case of constant motor revolutions, the number of layers of cutters (8) and the number of cutters per layer can be increased or decreased Control the particle size of the coal slime filter cake broken into small pieces.