CN215313189U - Coal slime treatment system - Google Patents

Abstract

The application discloses coal slime processing system, including first swirler, second swirler and classifying screen, first swirler has first overflow pipe, first underflow opening and is used for the first pan feeding mouth of pan feeding, the second swirler has second overflow pipe, second underflow opening and second pan feeding mouth, first overflow pipe is connected with second pan feeding mouth, the second overflow pipe is used for being connected with concentrated pond, first underflow opening and second underflow opening arrange the material extremely in proper order on the classifying screen. Utilize this application can realize the concentration and the hierarchical integration of waste rock product, the dehydration and the filtration integration of classifying screen improve the filtering quality of classifying screen, furthest improves the waste rock mud discharge amount, reduces the overflow concentration who gets into concentrated pond, reduces the waste rock mud volume that gets into concentrated pond, reduces the waste rock mud granularity that gets into concentrated pond, solves the problem that coal slime product ash content is high, the coal quality is poor.

Description

Coal slime treatment system

Technical Field

The application relates to the technical field of coal mines, in particular to a coal slime treatment system.

Background

In the coal wet separation process, a large amount of coal slime inevitably enters water to form slime water. The granularity of the coal slime in the coal slime water is 1.5-0mm, the common treatment process comprises the steps of carrying out hydraulic classification firstly, enabling classified coarse particles to enter a subsequent coarse coal slime treatment system, and enabling classified fine-grained materials to enter a subsequent fine coal slime treatment system.

And (4) completely discharging the gangue with the particle size of-0.5 mm separated by the coarse slime treatment system into a concentration tank, and completely entering a slime system to be sold as a product after sedimentation, concentration and filtration. The inventor discovers that a large amount of gangue mud exists in gangue with the particle size of-0.5 mm, and the gangue mud is directly sold as a product and can seriously affect the quality of commercial coal in the process of realizing the application.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present application provides a coal slurry processing system to solve the above technical problems.

The application provides a coal slime processing system, it includes: first swirler, second swirler and classifying screen, first swirler has first overflow pipe, first underflow opening and is used for the first pan feeding mouth of pan feeding, the second swirler has second overflow pipe, second underflow opening and second pan feeding mouth, first overflow pipe is connected with second pan feeding mouth, the second overflow pipe is used for being connected with concentrated pond, first underflow opening and second underflow opening arrange the material extremely in proper order on the classifying screen.

Optionally, the method further comprises: the first pressure gauge is used for monitoring the feeding pressure of the first cyclone, the first feeding pipe is installed on the first feeding port, the first pressure gauge is installed on the first feeding pipe, and a first valve for controlling on-off and adjusting the feeding pressure is arranged on the first feeding pipe.

Optionally, still include controller, waste rock pump and hold the waste rock bucket of material, first manometer sends pressure data to the controller, the controller receives pressure data, and according to pressure data control waste rock pump gives first pan feeding pipe with the material in the waste rock bucket, and the controller is connected with first manometer and waste rock pump electricity respectively.

Optionally, the classifying screen is a high-frequency screen, and undersize materials of the high-frequency screen are discharged into the gangue barrel.

Optionally, the method further comprises: the ore pulp distributor is provided with a feeding pipe and a plurality of discharging pipes, the feeding pipe is connected with the first overflow pipe, the number of the second cyclones is multiple, and the plurality of discharging pipes are connected with a plurality of second feeding ports in a one-to-one correspondence mode.

Optionally, the cyclone material feeding device further comprises a second pressure gauge for monitoring the feeding pressure of the second cyclone, the second feeding port is connected with the first overflow pipe through a second feeding pipe, the second pressure gauge is installed on the second feeding pipe, a second valve for controlling on-off and adjusting the feeding pressure is arranged on the second feeding pipe, and the second pressure gauge is located between the second feeding port and the second valve.

Optionally, the cyclone water supply device further comprises a water supply pipe for supplying water into the second cyclone, the water supply pipe is connected with the second feeding pipe, the second feeding pipe is located between the second valve and the second pressure gauge, and the water supply pipe is provided with a water supply valve for adjusting the water supply amount.

Optionally, still include first underflow case, second underflow case, first pan feeding case and second pan feeding case, first underflow case has first feed inlet and first discharge gate, first feed inlet cover is established on first underflow mouth, first pan feeding case is installed on the pan feeding end of classifying screen, first discharge gate is gone into the classifying screen through first pan feeding case with the material, the top at the intermediate position of classifying screen is installed to second pan feeding case, second underflow case has second feed inlet and second discharge gate, the second feed inlet cover is established on second underflow mouth, the second discharge gate is arranged the material to the classifying screen through second pan feeding case.

Optionally, the first swirler has a larger inner diameter and a larger cone angle than the second swirler.

Optionally, the device further comprises an overflow box, and the material discharged by the second overflow pipe enters the concentration tank through the overflow box.

The coal slurry treatment system provided by the application is provided with the classifying screen, the first cyclone and the second cyclone which are connected in series, the overflow of the first cyclone enters the second cyclone, the overflow of the second cyclone enters the concentrating tank, the underflow of the two cyclones is sequentially discharged onto the classifying screen, the first underflow is dehydrated in the classifying screen to form the filter layer, the gangue in the second underflow is discharged out of the gangue product system by utilizing the filter layer, the concentration and classification integration of the gangue product can be realized, the dehydration and filtration integration of the classifying screen are realized, the filtration performance of the classifying screen is improved, the discharge amount of the gangue mud is furthest improved, the overflow concentration entering the concentrating tank is reduced, the amount of the gangue mud entering the concentrating tank is reduced, the granularity of the gangue mud entering the concentrating tank is reduced, the problems of high ash content and poor coal quality of the gangue product are solved, the coal quality is improved, the risk of pressing rake caused by the gangue is eliminated, and the working load of the concentrating tank is reduced, the problems of difficult sedimentation of slime water and blackening of circulating water in the concentration tank are avoided, the quality of the circulating water is improved, and the device is simple in structure and low in cost.

Drawings

Fig. 1 is a schematic structural diagram of a coal slurry treatment system of the present application.

FIG. 2 is a schematic view of a connection of a first cyclone to a second cyclone of the present application.

Detailed Description

The technical solutions of the present application are described in detail below with reference to the accompanying drawings and specific embodiments. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Fig. 1 shows a schematic structural diagram of a coal slurry treatment system of the present application, and fig. 2 shows a schematic connection diagram of a first cyclone and a second cyclone of the present application. As shown in fig. 1-2, the present application provides a coal slurry treatment system, comprising: first cyclone 5, second cyclone 17 and classifying screen 23.

The first cyclone 5 has a first overflow pipe 8, a first underflow opening 6 and a first feed opening for feeding.

The second cyclone 17 has a second overflow pipe 15, a second underflow opening 18 and a second inlet opening, to which the first overflow pipe 8 is connected.

The second overflow pipe 15 is used for connecting with a concentration tank, and the first underflow port 6 and the second underflow port 18 both discharge materials onto the classifying screen 23.

When the coal slime treatment system works, primary coal slime firstly enters a primary coal slime barrel and is fed into a classification swirler for pre-classification at a certain pressure through a coal slime pump, the pre-classified overflow enters a concentration tank, the pre-classified underflow is a material with the particle size of 0.5-3mm, and the pre-classified underflow enters coarse coal slime separation equipment for separation.

The coarse slime separation equipment can adopt TBS (Teeter Bed Separator) or a spiral Separator. The sorted products are generally clean coal and gangue, and three products, namely clean coal, middlings and gangue, can be obtained.

The cleaned coal and the middlings are classified again by a cleaned coal cyclone, the overflow of the cleaned coal cyclone is sent to a concentration tank, the underflow of the cleaned coal cyclone is dehydrated by coarse coal slime dehydration equipment to obtain cleaned coal products, and the water obtained by dehydration enters the cleaned coal cyclone for classification again.

The gangue enters a gangue barrel, is fed into a first cyclone 5 at a certain pressure through a gangue pump, and under the action of the first cyclone 5, a first underflow with high concentration and coarse particles is obtained, and the first underflow is fed into a classifying screen 23 through a first underflow port 6 for dehydration. The gangue of the first underflow forms a filter layer on the screen surface of the classifying screen.

The overflow of the first cyclone 5 enters the second cyclone 17, and a second underflow of medium concentration and medium particles is obtained under the action of the second cyclone 17, the second underflow is fed into the classifying screen 23 through the second underflow port 18, and gangue of the second underflow is located above the filtering layer.

And discharging the gangue with the medium size fraction in the second underflow to a gangue product system by using the filter layer. The rotational flow of the second cyclone 17 enters a concentration tank, and commercial coal is mixed after concentration and filtration.

The coal slurry treatment system provided by the application is provided with the classifying screen, the first cyclone and the second cyclone which are connected in series, the overflow of the first cyclone enters the second cyclone, the overflow of the second cyclone enters the concentrating tank, the underflow of the two cyclones is sequentially discharged onto the classifying screen, the first underflow is dehydrated in the classifying screen to form the filter layer, the gangue in the second underflow is discharged out of the gangue product system by utilizing the filter layer, the concentration and classification integration of the gangue product can be realized, the dehydration and filtration integration of the classifying screen are realized, the filtration performance of the classifying screen is improved, the discharge amount of the gangue mud is furthest improved, the overflow concentration entering the concentrating tank is reduced, the amount of the gangue mud entering the concentrating tank is reduced, the granularity of the gangue mud entering the concentrating tank is reduced, the problems of high ash content and poor coal quality of the gangue product are solved, the coal quality is improved, the risk of pressing rake caused by the gangue is eliminated, and the working load of the concentrating tank is reduced, the problems of difficult sedimentation of slime water and blackening of circulating water in the concentration tank are avoided, the quality of the circulating water is improved, and the device is simple in structure and low in cost.

The coal slime treatment system provided by the application can be suitable for coal preparation plant for gangue argillization, and does not need to set a flotation link or the flotation link requires that the feed granularity is less than 0.25mm for coal slime water classification.

Further, the coal slurry processing system further comprises: a first manometer 2 for monitoring the pan feeding pressure of first swirler 5, install first pan feeding pipe 1 on the first pan feeding mouth, first manometer 2 installs on first pan feeding pipe 1, be provided with the first valve 3 of the first pan feeding pipe 1 break-make of control on the first pan feeding pipe 1.

Through setting up first manometer 2 and first valve 3, can realize the control to the pan feeding pressure of first swirler 5, guarantee coal slime processing system's normal operating.

First valve 3 may be manually controlled or automatically controlled in relation to the value indicated by first pressure gauge 2 to control the feed pressure to first cyclone 5.

Optionally, the coal slime processing system still includes controller, waste rock pump and the waste rock bucket that holds the material, first manometer 2 sends pressure data to the controller.

The controller receives the pressure data and controls the gangue pump to feed materials in the gangue barrel into the first feeding pipe according to the pressure data, and the controller is respectively electrically connected with the first pressure gauge 2 and the gangue pump.

Through setting up controller, waste rock pump and waste rock bucket, can realize the automatic control of waste rock pump material pressure, realize the regulation to 5 pan feeding pressures of first swirler.

The controller uses existing logic programming to implement the control function. The controller and the first pressure gauge 2 and the gangue pump can be electrically connected by RS485 communication cables.

In the embodiment, the gangue pump can adopt a slurry pump. The waste rock bucket can be a round bucket formed by welding steel plates.

In one embodiment, the grading screen 23 may be a high frequency screen, and undersize materials of the high frequency screen are discharged into the gangue bucket.

Further, the coal slurry processing system further comprises: a pulp distributor 9 having a feed pipe and a plurality of discharge pipes.

The inlet pipe with first overflow pipe 8 is connected, the quantity of second swirler 17 is a plurality of, a plurality of row material pipes are connected with a plurality of second pan feeding mouth one-to-one.

By providing a slurry distributor 9, the overflow from the first cyclone 5 can be fed evenly into a plurality of second cyclones 17.

In this embodiment, the slurry distributor 9 may be a sealed box made of metal material, or may be made of a sealed pipe.

Preferably, the coal slurry treatment system further comprises a second pressure gauge 13 for monitoring the feeding pressure of the second cyclone 17, and the second feeding port is connected with the first overflow pipe 8 through a second feeding pipe 10.

One end of the first overflow pipe 8 is inserted into the first cyclone 5, and the other end is connected to the second cyclone 17, and the overflow of the first cyclone 5 is led out and fed into the second cyclone 17.

The second pressure gauge 13 is arranged on the second feeding pipe 10, a second valve 11 for controlling on-off and adjusting feeding pressure is arranged on the second feeding pipe 10, and the second pressure gauge 13 is located between the second feeding hole and the second valve 11.

The second valve 11 adjusts the feeding pressure of the second cyclone 17 according to the display value of the second pressure gauge 13.

The second pressure gauge 13 and the second valve 11 are arranged, so that the feeding pressure of the second cyclone 17 can be conveniently adjusted.

In this embodiment, the first pressure gauge 2 and the second pressure gauge 13 can both adopt pressure sensors, and the first valve 3 and the second valve 11 can adopt wear-resistant ball valves or wear-resistant gate valves.

In one embodiment, the coal slurry treatment system further comprises a water replenishing pipe 12 for replenishing water into the second cyclone 17, the water replenishing pipe 12 is connected with the second feeding pipe 10, the second feeding pipe 10 is located between the second valve 11 and the second pressure gauge 13, and a water replenishing valve 22 for adjusting the amount of the replenished water is arranged on the water replenishing pipe 12.

The water replenishing pipe 12 replenishes water according to the pressure value of the second pressure gauge 13 of the second cyclone 17 so as to adjust the feeding pressure of the second cyclone 17, so that the second cyclone 17 can work better.

In this embodiment, both the first material inlet pipe 1 and the second material inlet pipe 10 can be circular pipes, and both the first material inlet and the second material inlet are rectangular openings.

The first feeding port is connected with the first feeding pipe 1 through a first conversion joint 4, and the second feeding port is connected with the second feeding pipe 10 through a second conversion joint 14.

Wherein, the two ends of the first conversion joint 4 and the second conversion joint 14 are respectively a rectangular pipe and a circular pipe. By providing the first adapter 4 and the second adapter 14, the assembly efficiency can be improved.

Further, the coal slime treatment system also comprises a first underflow box 7, a second underflow box 19, a first feeding box 20 and a second feeding box 21.

The first underflow box 7 is provided with a first feeding hole and a first discharging hole, and the first feeding hole is sleeved on the first underflow opening 6.

First pan feeding case 20 is installed above the pan feeding end of classifying screen 23, first discharge gate is discharged the material to classifying screen 23 through first pan feeding case 20.

The second underflow box 19 has a second feed inlet and a second discharge outlet, and the second feed inlet is sleeved on the second underflow opening 18.

The second feeding box 21 is arranged above the middle position of the classifying screen 23, and the second discharging hole discharges the materials to the classifying screen 23 through the second feeding box 21.

In this embodiment, the first feeding box 20 and the first underflow box 7, and the second feeding box 21 and the second underflow box 19 are all connected by a pipeline.

The widths of the first feeding box 20 and the second feeding box 21 are slightly smaller than that of the classifying screen 23. The first feeding box 20 and the second feeding box 21 can be made of steel plates.

The first underflow box 7 and the second underflow box 19 are arranged, so that materials discharged from the underflow port can be conveniently collected. The first feeding box 20 collects the materials discharged from the first underflow box 7 and uniformly feeds the materials into the feeding end of the high-frequency screen. A second feed bin 21 collects the second underflow of the second cyclone 17 and feeds it evenly over the middle filtering layer of the high frequency screen.

In one embodiment, the first swirler 5 has a larger inner diameter and a larger taper angle than the second swirler 17, which ensures that the second swirler 17 is fed.

Both the first cyclone 5 and the second cyclone 17 may be classified cyclones. The ratio of the length of the cylindrical section to the length of the conical section of first swirler 5 is about 1: 1, concentrating the fed material to obtain a first underflow with high concentration and large granularity.

The diameter of the first underflow port 6 is 75-100mm, the whole shape is conical, and the first underflow port is made of the existing wear-resistant material. First underflow port 6 discharges a first underflow of high concentration of large particles from first cyclone 5.

The ratio of the length of the cylindrical section to the length of the conical section of the second swirler 17 is about 1: and 3, classifying the overflow of the first cyclone 5 to obtain the overflow with low concentration and small granularity.

The second underflow port 18 has a diameter of 30-60mm and is conical in overall shape, and is also made of existing wear-resistant materials. Second underflow port 18 discharges a second underflow of intermediate-concentration intermediate particles from second cyclone 17.

Further, the coal slime treatment system also comprises an overflow box 16, and the material discharged by the second overflow pipe 15 enters the concentration tank through the overflow box 16.

By providing an overflow tank 16, the overflow product of the second cyclone 17 can be conveniently collected. And a wear-resistant layer is laid in the overflow box 16 to prolong the service life.

As shown in fig. 1-2, one end of the second overflow pipe 15 is inserted into the interior of the second cyclone 17, and the other end thereof enters the overflow tank 16, and the overflow of the second cyclone 17 is led out and fed into the overflow tank 16.

Then the third underflow is discharged to a concentration tank through an overflow box 16, and is settled and concentrated to obtain a third underflow with high concentration, and the third underflow is fed into a filter press to be dehydrated and to recover coal slime to obtain a coal slime product. And returning the filtrate water to the concentration tank for secondary sedimentation treatment, wherein the overflow of the concentration tank is used as circulating water.

In one embodiment, the first inlet tube 1, the second inlet tube 10, the first transfer joint 4 and the second transfer joint 14 are made of wear-resistant materials. The first overflow pipe 8 and the second overflow pipe 15 are both wear-resistant pipelines. The first underflow box 7 and the second underflow box 19 are both formed by welding steel plates, and wear-resistant layers are laid inside the first underflow box and the second underflow box to prolong the service life.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present application, and are not limited thereto; although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (10)

1. A coal slurry treatment system, comprising: first swirler, second swirler and classifying screen, first swirler has first overflow pipe, first underflow opening and is used for the first pan feeding mouth of pan feeding, the second swirler has second overflow pipe, second underflow opening and second pan feeding mouth, first overflow pipe is connected with second pan feeding mouth, the second overflow pipe is used for being connected with concentrated pond, first underflow opening and second underflow opening arrange the material extremely in proper order on the classifying screen.

2. The coal slurry treatment system of claim 1 further comprising: the first pressure gauge is used for monitoring the feeding pressure of the first cyclone, the first feeding pipe is installed on the first feeding port, the first pressure gauge is installed on the first feeding pipe, and a first valve for controlling on-off and adjusting the feeding pressure is arranged on the first feeding pipe.

3. The coal slurry treatment system of claim 2 further comprising a controller, a gangue pump and a gangue bucket for holding materials, wherein the first pressure gauge sends pressure data to the controller, the controller receives the pressure data and controls the gangue pump to feed materials in the gangue bucket into the first feeding pipe according to the pressure data, and the controller is electrically connected with the first pressure gauge and the gangue pump respectively.

4. The coal slurry treatment system of claim 3 wherein the classifying screen is a high frequency screen, and undersize material of the high frequency screen is discharged into the gangue bucket.

5. The coal slurry treatment system of claim 1 further comprising: the ore pulp distributor is provided with a feeding pipe and a plurality of discharging pipes, the feeding pipe is connected with the first overflow pipe, the number of the second cyclones is multiple, and the plurality of discharging pipes are connected with a plurality of second feeding ports in a one-to-one correspondence mode.

6. The coal slurry treatment system of claim 1 further comprising a second pressure gauge for monitoring the feed pressure to the second cyclone, wherein the second feed port is connected to the first overflow pipe through a second feed pipe, the second pressure gauge is mounted on the second feed pipe, a second valve is provided on the second feed pipe for controlling on/off and adjusting the feed pressure, and the second pressure gauge is located between the second feed port and the second valve.

7. The coal slurry treatment system of claim 6 further comprising a water replenishing pipe for replenishing water into the second cyclone, wherein the water replenishing pipe is connected with a second inlet pipe, the second inlet pipe is located between the second valve and the second pressure gauge, and the water replenishing pipe is provided with a water replenishing valve for adjusting the amount of the replenished water.

8. The coal slime treatment system of any one of claims 1 to 7 further comprising a first underflow box, a second underflow box, a first feed box and a second feed box, wherein the first underflow box has a first feed port and a first discharge port, the first feed port is sleeved on the first underflow port, the first feed box is installed on the feed end of the classifying screen, the first discharge port discharges the material into the classifying screen through the first feed box, the second feed box is installed above the middle position of the classifying screen, the second underflow box has a second feed port and a second discharge port, the second feed port is sleeved on the second underflow port, and the second discharge port discharges the material to the classifying screen through the second feed box.

9. The coal slurry treatment system as claimed in any one of claims 1 to 7 wherein the first cyclone has a larger inner diameter and a larger cone angle than the second cyclone.

10. The coal slurry treatment system as set forth in any one of claims 1 to 7 further comprising an overflow tank through which the material discharged from the second overflow pipe enters the thickening tank.

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