CN211412358U

CN211412358U - Defoaming device for flotation clean coal

Info

Publication number: CN211412358U
Application number: CN201922170383.8U
Authority: CN
Inventors: 褚衍静; 张立轩; 卢健; 曹英华; 李新华
Original assignee: Jiangsu Shineng Industrial Technology Co ltd
Current assignee: Jiangsu Shineng Industrial Technology Co ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2020-09-04
Anticipated expiration: 2029-12-06

Abstract

The utility model discloses a defoaming device for flotation of refined coal, which comprises a shell, wherein the shell comprises an outer shell and an inner shell fixedly arranged in the outer shell, and one end of the inner shell is provided with a foam inlet; the inner shell is internally provided with a paddle and a centrifugal impeller, the bottom of the outer shell is fixedly provided with a pneumatic motor, and an output shaft of the pneumatic motor extends into the inner shell and is fixedly connected with the paddle and the centrifugal impeller; the utility model has the advantages of being simple in structure and convenient in operation, it can high efficiency thoroughly eliminate the foam, has not only guaranteed the effect of defoaming, the efficiency of the defoaming that improves moreover.

Description

Defoaming device for flotation clean coal

Technical Field

The utility model belongs to the technical field of the mineral processing equipment technique and specifically relates to a flotation is fire fighting equipment for clean coal.

Background

When the coal preparation plant adopts the flotation process to float the clean coal, a foam layer is formed on the liquid level of the ore pulp in the flotation tank, then the ore pulp is scraped out to the flotation concentrate buffer tank by the foam scraping mechanism, and the coal slime entering the flotation concentrate buffer tank is subjected to pressure filtration and dehydration to finally form the clean coal.

In the flotation process, the pulp is added with a medicament, the scraped foam is high in oiliness and viscosity, and the foam is difficult to automatically break. In order to ensure the smooth flotation, a flotation concentrate buffer pool is needed. The buffer pool not only occupies a large area, but also has an overflow phenomenon when the more foams are accumulated in the flotation concentrate buffer pool; the foam contains a large amount of gas, so that the subsequent pressure filtration dehydration treatment is not facilitated, and the working efficiency and the service life of the equipment are influenced. For solving this problem, adopt single defoaming mode to defoam usually among the prior art, for example artifical defoaming, water spray defoaming, defoaming agent defoaming etc. but this kind of traditional single defoaming mode exists that the defoaming effect is poor, the not thorough problem of defoaming.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can effectively solve above-mentioned technical problem's a defoaming device for flotation clean coal.

In order to achieve the purpose of the utility model, the following technical proposal is adopted:

a defoaming device for flotation of refined coal comprises:

the shell comprises an outer shell and an inner shell fixedly arranged in the outer shell, and one end of the inner shell is provided with a bubble inlet;

a paddle disposed inside the inner housing;

the centrifugal impeller is arranged in the inner shell and is positioned at one end, far away from the bubble inlet, of the paddle;

and the pneumatic motor is fixedly arranged at the bottom of the outer shell, and an output shaft of the pneumatic motor extends into the inner shell and is fixedly connected with the paddle and the centrifugal impeller.

Further, still including set firmly in inside coarse strainer, medium filter screen and the fine filter screen of interior casing, the coarse strainer is close to into the bubble mouth and sets up, medium filter screen is located the coarse strainer with between the fine filter screen, fine filter screen is located the paddle is kept away from centrifugal impeller's one end.

Furthermore, a water spray nozzle is arranged in the inner shell and between the paddle and the centrifugal impeller, the water inlet end of the water spray nozzle is fixedly connected with the side wall of the inner shell, and the water outlet end of the water spray nozzle is opposite to the upper surface of the centrifugal impeller.

Furthermore, the inside of the inner shell is located at one end, far away from the blades, of the centrifugal impeller, and a slurry discharge impeller is arranged at one end of the inner shell and fixedly connected with an output shaft of the pneumatic motor.

Furthermore, liquid discharge holes are uniformly distributed on the side wall of one end, close to the pneumatic motor, of the inner shell, and a slurry discharge port communicated with the liquid discharge holes is formed in the bottom of the outer shell.

Furthermore, the side wall of the inner shell is evenly provided with exhaust holes along the circumferential direction, and the exhaust holes are positioned between the slurry discharge impeller and the liquid discharge hole

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a set up pneumatic motor drive paddle and centrifugal impeller and rotate simultaneously to constantly draw the foam into in the inner casing and smash it, then make collision each other breakage between the tiny foam under centrifugal impeller's centrifugal action, thereby thoroughly eliminate the foam, reach the purpose of defoaming, simple structure not only, convenient operation, the defoaming is effectual moreover, efficient.

2. The utility model discloses a from last coarse strainer, medium filter screen, the fine filter screen of down installing in proper order in bubble inlet department to can become the small bubble of being convenient for to eliminate with the big bubble in the foam that gets into interior casing, thereby can further improve the effect of defoaming.

3. The water mist nozzle is arranged between the paddle and the centrifugal impeller, so that on one hand, the weight of foam can be increased, and a better centrifugal defoaming effect can be achieved; on the other hand, the concentration of the medicament in the foam can be diluted, and the continuous foaming after the defoaming is prevented, so that the defoaming effect is ensured.

4. The utility model discloses a including the inside of casing set up by air motor driven row thick liquid impeller, it can be fast discharge by the outage with the mixture of water and clean coal after the defoaming to guarantee that defoaming work is high-efficient to be gone on continuously.

5. The utility model discloses an exhaust hole is seted up to the lateral wall of casing including to can be at the gaseous of the broken production of in-process quick discharge foam of defoaming, and then guarantee subsequent pressure filtration dehydration and handle, and then improved the efficiency of flotation clean coal, prolonged the life of equipment simultaneously.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.

Fig. 1 is a schematic sectional view of a defoaming device for flotation of clean coal according to the present invention;

fig. 2 is an enlarged view of a portion a in fig. 1.

Numerical description in the figures:

1. a housing; 11. an outer housing; 12. an inner housing; 13. a connecting plate; 14. a bubble inlet; 15. an exhaust hole; 16. a drain hole; 17. a slurry discharge port;

2. a paddle; 3. a centrifugal impeller; 4. a pneumatic motor; 5. coarse filtration; 6. a medium filter screen; 7. a fine filter screen; 8. a water mist nozzle; 9. a slurry discharge impeller.

Detailed Description

The defoaming device for flotation of clean coal of the present invention will be described in detail with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "center", "lateral", "longitudinal", "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the scope of the invention.

As shown in fig. 1 and 2, the utility model provides a defoaming device for flotation clean coal, which comprises a shell 1, a paddle 2 and a centrifugal impeller 3 which are positioned in the shell 1, and a pneumatic motor 4 which is fixedly arranged at the bottom of the shell 1; the shell 1 comprises an outer shell 11 and an inner shell 12 sleeved inside the outer shell 11, the bottom of the outer shell 11 is integrally connected with a connecting plate 13, and the side wall of the inner shell 12 is fixedly connected with the side wall of the connecting plate 13 through a bolt.

The top of inner casing 12 is equipped with into bubble mouth 14, paddle 2 with centrifugal impeller 3 all is located the inside of inner casing 12, just paddle 2 is close to into bubble mouth 14 setting, centrifugal impeller 3 is located the below of paddle 2. The driving end of the pneumatic motor 4 is fixed on the lower surface of the connecting plate 13 through a bolt, and the output shaft of the pneumatic motor penetrates through the connecting plate 13 and extends into the inner part of the inner shell 12 to be fixedly connected with the paddle 2 and the centrifugal impeller 3, wherein the specific fixed connection mode is preferably key connection, and the connection mode is the prior art and is not repeated herein. In addition, a sealing element is installed at the connecting position of the output shaft of the pneumatic motor 4 and the connecting plate 13, so that the pneumatic motor 4 can be prevented from being broken down due to the fact that a mixture of water and clean coal flows into the pneumatic motor 4 in the defoaming process, and the high-speed continuous operation of defoaming work is guaranteed.

The pneumatic motor 4 is used for driving the blades 2 and the centrifugal impeller 3 to rotate, the blades 2 rotating at a high speed have large attraction, bubbles can be quickly sucked into the inner shell 12, the foams are smashed into fine foams, and then the fine foams are collided and broken under the action of the centrifugal impeller 3 rotating at a high speed, so that the foams are thoroughly eliminated, and the purpose of defoaming is achieved. It should be noted here that the pneumatic motor 4 is a high-speed pneumatic motor 4, which has a speed regulation function, and the rotation speed of the blades 2 and the centrifugal impeller 3 can be adjusted as required during use.

In the present embodiment, in order to further improve the defoaming effect and improve the defoaming efficiency, a coarse strainer 5, a medium strainer 6, a fine strainer 7, and a water mist nozzle 8 are installed inside the inner housing 12; wherein the coarse strainer 5 is disposed near the bubble inlet 14, the medium strainer 6 is disposed between the coarse strainer 5 and the fine strainer 7, and the fine strainer 7 is disposed above the paddle 2; the foam enters the inner shell 12 from the foam inlet 14 and then passes through the coarse filter 5, the medium filter 6 and the fine filter 7 in sequence, so that large bubbles in the foam are changed into small bubbles which are easy to eliminate, and then the small bubbles are completely eliminated under the action of the blades 2 and the centrifugal impeller 3.

The water spray nozzle 8 is positioned between the blade 2 and the centrifugal impeller 3, the water inlet end of the water spray nozzle is arranged on the outer side wall of the inner shell 12 through a fixing nut, the water outlet end of the water spray nozzle is aligned to the upper surface of the centrifugal impeller 3, and the water spray nozzle 8 is used for spraying water mist to crushed fine foam in the defoaming process, so that the weight of the foam can be increased, and a better centrifugal defoaming effect can be achieved; on the other hand, the concentration of the medicament in the foam can be diluted, so that continuous foaming after defoaming is prevented, and the defoaming effect is further ensured.

In addition, the exhaust holes 15 are uniformly distributed on the side wall of the lower end of the inner shell 12 in the example along the circumferential direction, so that gas released by foam crushing can be rapidly exhausted into the outer shell 11 in the defoaming process, and then the gas is exhausted into the air from the outer shell 11, and further the subsequent pressure filtration dehydration treatment is ensured.

Specifically, in this embodiment, in order to facilitate quick discharge of a mixture of water and clean coal after defoaming, a slurry discharge impeller 9 is disposed below the centrifugal impeller 3 inside the inner housing 12, liquid discharge holes 16 are uniformly distributed in the circumferential direction on the side wall of the lower end of the inner housing 12, and a slurry discharge port 17 communicated with the liquid discharge holes 16 is disposed at the bottom of the outer housing 11; wherein the slurry discharge impeller 9 is fixed with the output shaft of the pneumatic motor 4 in a key connection manner; the liquid discharge hole 16 is positioned below the exhaust hole 15, and the exhaust hole 15 is positioned below the slurry discharge impeller 9. In the defoaming process, the pneumatic motor 4 drives the slurry discharge impeller 9 to rotate at a high speed, so that the mixture of water and clean coal after defoaming is discharged from the liquid discharge hole 16 into the outer shell 11 and finally discharged through the slurry discharge hole 17.

The working principle of the utility model is as follows:

firstly, the defoaming device of the utility model is fixed at the outer bottom of a flotation concentrate tank of a flotation tank, and then the foam which is floated out is led into a foam inlet 14 of the defoaming device; the pneumatic motor 4 is started to drive the blades 2 to rotate at a high speed so as to continuously suck foams into the inner shell 12, the foams firstly pass through the coarse filter screen 5 to eliminate large foams, then pass through the medium filter screen 6 to further eliminate large foams, finally pass through the fine filter screen 7 to reduce the foams, the foams are further smashed when passing through the blades 2, then the small foams collide with each other and are broken under the action of the centrifugal impeller 3 rotating at a high speed so as to completely eliminate the foams, and in the process, the water spray nozzles 8 are simultaneously opened to spray water to the foams so as to increase the gravity of the foams, so that the defoaming effect is further improved; the mixture of water and clean coal after defoaming is discharged from the liquid discharge hole 16 into the outer casing 11 by the action of the slurry discharge impeller 9 rotating at high speed, and finally discharged from the slurry discharge port 17.

Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.

Claims

1. The utility model provides a flotation defoaming device for clean coal which characterized in that: the method comprises the following steps:

a paddle disposed inside the inner housing;

2. The defoaming device for flotation clean coal according to claim 1, characterized in that: still including set firmly in inside coarse strainer, medium filter screen and the fine filter screen of interior casing, the coarse strainer is close to into the bubble mouth setting, medium filter screen is located the coarse strainer with between the fine filter screen, fine filter screen is located the paddle is kept away from centrifugal impeller's one end.

3. The defoaming device for flotation clean coal according to claim 2, characterized in that: the inner part of the inner shell is provided with a water spray nozzle between the paddle and the centrifugal impeller, the water inlet end of the water spray nozzle is fixedly connected with the side wall of the inner shell, and the water outlet end of the water spray nozzle is opposite to the upper surface of the centrifugal impeller.

4. The defoaming device for flotation clean coal according to claim 1 or 3, characterized in that: the inner portion of the inner shell is located at one end, far away from the blades, of the centrifugal impeller, and a slurry discharging impeller is arranged at one end of the inner shell and fixedly connected with an output shaft of the pneumatic motor.

5. The defoaming device for flotation clean coal according to claim 4, characterized in that: liquid discharge holes are uniformly distributed on the side wall of one end, close to the pneumatic motor, of the inner shell, and a slurry discharge port communicated with the liquid discharge holes is formed in the bottom of the outer shell.

6. The defoaming device for flotation clean coal according to claim 5, characterized in that: the side wall of the inner shell is evenly provided with exhaust holes along the circumferential direction, and the exhaust holes are positioned between the slurry discharge impeller and the liquid discharge hole.