CN216936527U

CN216936527U - Hydraulic classification swirler for coal dressing

Info

Publication number: CN216936527U
Application number: CN202220203676.0U
Authority: CN
Inventors: 宋涛; 高品; 路兴远; 雷旭东; 贾卫东
Original assignee: Shaanxi Coal Mining Hancheng Mining Co Ltd
Current assignee: Shaanxi Coal Mining Hancheng Mining Co Ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-07-12
Anticipated expiration: 2032-01-25

Abstract

The utility model provides a hydraulic classification swirler for coal dressing, which comprises an upper circular tube and a lower circular tube, wherein the upper circular tube is connected with the lower circular tube through a first flange mechanism; the underflow pipe comprises a feeding port and an underflow port, and the inner diameter of the underflow port is smaller than that of the feeding port, so that the problems that part of coarse particles in the materials of the existing cyclone cannot be recovered through a normal flotation process and then enter a concentration tank and the product loss is large are solved.

Description

Hydraulic classification swirler for coal dressing

Technical Field

The utility model relates to the technical field of coal mine production, in particular to a hydraulic classification cyclone for coal dressing.

Background

The cyclone equipment is mostly adopted for coal dressing in the coal dressing operation of the mining industry, coarse particles in materials of the existing cyclone can reversely flow to an overflow port, the phenomenon of coarse particles in flotation is caused, the coarse particles can not be recycled through a normal flotation process and then enter a concentration tank, and the product loss is large.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems that part of coarse particles in materials of the existing cyclone can not be recovered through a normal flotation process and then enter a concentration tank, and the product loss is large, and provides a hydraulic classification cyclone for coal dressing. In order to achieve the purpose, the utility model adopts the following technical scheme:

a hydraulic classification swirler for coal dressing comprises an upper circular tube and a lower circular tube, wherein the upper circular tube is connected with the lower circular tube through a first flange mechanism, the lower end of the lower circular tube is connected with a conical tube through a second flange mechanism, the lower end of the conical tube is provided with a sand settling tube, and the lower end of the sand settling tube is provided with a bottom flow tube through a third flange mechanism;

the underflow pipe comprises a feeding port and an underflow port, and the ratio of the inner diameter of the underflow port to the inner diameter of the feeding port is 22/35; the ratio is effective to increase the throughput of the insole per unit time.

Furthermore, the lateral wall intercommunication of going up the pipe has the overflow to violently manage, be equipped with the connection pad the same with last pipe diameter on the inner wall of going up the pipe, the connection pad is equipped with a round hole, is equipped with the overflow inner tube along the round hole below, and the round tube under being located of overflow inner tube.

Further, the side wall of the lower round pipe is communicated with a feeding pipe.

Further, the overflow violently manages the one end of keeping away from last pipe and install first ring flange, the one end that the pipe was kept away from to the feed pipe is installed the second ring flange.

Further, the internal diameter of pan feeding mouth is 350mm, the internal diameter of underflow mouth is 220 mm.

Compared with the prior art, the utility model has the beneficial effects that: 1. the underflow opening of the underflow pipe is set to be 220mm, the through-flow quantity of the underflow opening in unit time can be increased, and therefore the phenomenon that coarse particles run coarse in a flotation mode due to the fact that the coarse particles reversely flow to the overflow opening in a reverse mode is avoided. 2. The third flange mechanism is arranged on the underflow pipe, so that the underflow pipe can be conveniently detached and installed, when the underflow pipe needs to be maintained, cleaned or replaced, the third flange mechanism can be detached to detach the underflow pipe, and the operation is simple and rapid. In conclusion, the utility model has the advantages of ingenious structure and reasonable design, can safely and effectively operate, can effectively control the occurrence of the phenomenon of coarse flotation, increases the recovery rate of clean coal, reduces the quantity of filter-pressing coal slime and increases economic benefits.

Drawings

FIG. 1 is a schematic structural view of a hydraulic classification cyclone for coal dressing according to the present invention;

fig. 2 is a schematic partial sectional view of a hydraulic classification cyclone for coal preparation according to the present invention.

In the figure: 1. an upper circular tube; 2. a transverse overflow pipe; 3. a lower circular tube; 4. an overflow inner pipe; 5. a feed pipe; 6. a conical tube; 7. an underflow pipe; 8. a connecting disc; 9. a first flange mechanism; 10. a second flange mechanism; 11. a sand setting pipe; 12. a third flange mechanism; 701. a feeding port; 702. and a bottom flow port.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1-2, the embodiment of the utility model discloses a hydraulic classification cyclone for coal dressing, which comprises an upper circular tube 1 and a lower circular tube 3, wherein the side wall of the lower circular tube 3 is communicated with a feeding tube 5, one end of the feeding tube 5, which is far away from the upper circular tube 1, is provided with a second flange, the upper circular tube 1 is connected with the lower circular tube 3 through a first flange mechanism 9, the lower end of the lower circular tube 3 is connected with a conical tube 6 through a second flange mechanism 10, the lower end of the conical tube 6 is provided with a sand settling tube 11, the lower end of the sand settling tube 11 is provided with a bottom flow tube 7 through a third flange mechanism 12, and the bottom flow tube 7 is made of alumina wear-resistant ceramics, so that the service life of the bottom flow tube 7 is ensured, and the replacement cycle is prolonged.

Underflow pipe 7 includes pan feeding mouth 701 and underflow port 702, and the internal diameter of underflow port 702 is less than pan feeding mouth 701's internal diameter, pan feeding mouth 701's internal diameter is 350mm, the internal diameter of underflow port 702 is 220mm, compare in prior art's internal diameter ratio, the through-put volume of underflow port 702 in the unit interval can be increased, thereby shorten the material that gets into in underflow pipe 7 at its inside dwell time, avoid because the reverse adverse current of material dwell time overlength coarse grain to overflow port causes the flotation to run the emergence of thick phenomenon.

The lateral wall of the upper round tube 1 is communicated with the overflow transverse tube 2, the inner wall of the upper round tube 1 is provided with a connecting disc 8 with the same diameter as the upper round tube 1, the connecting disc 8 is provided with a round hole, an overflow inner tube 4 is arranged below the round hole, and the overflow inner tube 4 is positioned in the lower round tube 3.

The feeding pipe 5 and the overflow transverse pipe 2 are connected into the coal separation system through flange connection, then the material is filled into the cyclone through the feeding pipe 5, the material enters the cyclone from the feeding pipe 5 at a higher speed, the material is limited by the inner wall of the lower circular pipe 3, the material is forced to rotate from top to bottom, solid particles in the outer cyclone are acted by centrifugal force, if the density is more than the liquid density, the larger the centrifugal force is, when the centrifugal force is larger than the liquid resistance generated by the movement, the solid particles move towards the inner wall of the lower circular tube 3 by overcoming the resistance, separated from the suspension, the particles reaching the inner wall of the lower round tube 3 are pushed by the continuous liquid to move downwards along the inner wall of the lower round tube 3, and reaches the inner wall of the conical pipe 6 and continues to move downwards until it is collected as a thickened suspension in the vicinity of the sand trap 11 and flows out of the cyclone through the underflow pipe 7.

The separated liquid and the solid with smaller particles in the liquid rotate and continue to move downwards, reach the inner wall of the conical pipe 6 and continue to move downwards, and after entering the conical pipe 6, because the inner diameter of the conical pipe 6 is gradually reduced, the rotating speed of the liquid is accelerated, and because the pressure in the radial direction is unevenly distributed when the liquid generates vortex motion, the material stress at the position closer to the axis is smaller and approaches to zero when the material reaches the axis, the formation of a low pressure zone, even a vacuum zone, near the axis of the conical tube 6, causes the liquid to move in the direction of the axis, at the same time, because the inner diameter of the sand settling pipe 11 of the hydrocyclone separator is greatly reduced relative to the conical pipe 6, liquid can not be discharged from the bottom of the sand settling pipe 11 in time, and the overflow port at the center of the top cover of the cyclone cavity, due to the low pressure zone a part of the liquid is moved towards it, thus creating an upward rotational movement and is discharged from the cyclone via the overflow inner tube 4 and the overflow cross-tube 2.

It is noted that the ratio of the inner diameter of the underflow port 702 to the inner diameter of the feed port 701 is 22/35; this ratio may increase the throughput of the bottom flow port 702 per unit time, thereby avoiding the occurrence of coarse particles flowing back to the overflow port in a reverse direction to cause flotation.

Claims

1. The utility model provides a hydraulic classification swirler for coal dressing, includes pipe (1) and lower pipe (3), its characterized in that: the upper circular pipe (1) is connected with the lower circular pipe (3) through a first flange mechanism (9), the lower end of the lower circular pipe (3) is connected with a conical pipe (6) through a second flange mechanism (10), a sand-settling pipe (11) is arranged at the lower end of the conical pipe (6), and a bottom flow pipe (7) is arranged at the lower end of the sand-settling pipe (11) through a third flange mechanism (12);

the underflow pipe (7) comprises a feeding port (701) and an underflow port (702), and the ratio of the inner diameter of the underflow port (702) to the inner diameter of the feeding port (701) is 22/35; the ratio is effective to increase the throughput of the insole per unit time.

2. The hydraulic classification cyclone for coal dressing according to claim 1, characterized in that: go up the lateral wall intercommunication of pipe (1) and have the overflow to violently manage (2), be equipped with on the inner wall of going up pipe (1) connection pad (8) the same with last pipe (1) diameter, connection pad (8) are equipped with a round hole, are equipped with overflow inner tube (4) along the round hole below, and in the pipe (3) down of being located of overflow inner tube (4).

3. The hydraulic classification cyclone for coal dressing according to claim 2, characterized in that: the side wall of the lower circular pipe (3) is communicated with a feeding pipe (5).

4. The hydraulic classification cyclone for coal dressing according to claim 3, characterized in that: the overflow is violently managed (2) and is kept away from the one end of last pipe (1) and install first ring flange, the one end that last pipe (1) was kept away from in feed pipe (5) is installed the second ring flange.

5. The hydraulic classification cyclone for coal dressing according to claim 1, characterized in that: the inner diameter of the feeding port (701) is 350mm, and the inner diameter of the underflow port (702) is 220 mm.