CN114210552B - Dry method sorting system suitable for sorting slack coal - Google Patents

Abstract

The invention discloses a dry separation system suitable for separating fine coal, which comprises a bed body, a driving device, a sieve plate and a feeding device, wherein the driving device is a driving motor, sieve holes are distributed on the sieve plate, the sieve plate with the sieve holes is arranged on the separation bed body, the feeding device conveys the fine coal to the separation bed body, and the separation bed body is driven by the driving device to vibrate and is used for separating the fine coal. The dry method sorting system suitable for sorting the slack coal solves the problem that the sieve pores are blocked by the existing sorting mechanism, and provides sorting capacity; the ventilating device can ventilate into the ventilating holes, then the air is blown into the sieve holes from the communicating holes, and the blocked materials in the sieve holes can be blown clean.

Description

A dry separation system suitable for separating coal at the end

technical field

The invention belongs to the technical field of coal separation, and in particular relates to a dry separation system suitable for sorting fine coal.

Background technique

my country's coal preparation industry started late, and its own coal preparation industry was established in the 1950s; the growth rate of raw coal selection during the "Eighth Five-Year Plan" period exceeded the growth rate of raw coal for the first time, and coal preparation during the "Ninth Five-Year Plan" and "Tenth Five-Year" period. Sustained and rapid growth; in 2008, the amount of raw coal selected was 1.1 billion tons, with a selection rate of 43%; in 2009, my country produced a total of 3.05 billion tons of raw coal, and the washing rate of raw coal basically did not increase; in recent years, my country has paid more and more attention to the development of coal preparation, especially The number of coal preparation plants has been increasing since 2010.

The clean utilization of coal resources has increasingly become a key issue that the coal industry needs to pay attention to in recent years. Dry coal preparation can reduce various harmful substances in coal, which is of positive significance to environmental protection. The distribution area of coal resources is mainly in the northwest region and other areas with scarce water resources. In many cases, wet coal preparation is unfeasible and wastes water resources. There are also many similar lignites that will be slurried or muddy The type of coal cannot be prepared by wet coal preparation. Dry coal preparation has developed rapidly in recent years, which is beneficial to resource conservation and environmental protection.

There is no vibrating composite dry separation system suitable for the separation of fine coal in the existing dry separation device. The reason is that the existing dry separation device includes a feeding device, a separation bed, a discharge device, a Air device, gas distributor and bottom bracket, the separation bed is provided with multi-layer bed surface sieve plates for screening, when the existing dry separation device is used for sorting fine coal, the multi-layer bed surface sieve plate The sieve holes are easy to block, which affects the coal screening, and the cleaning of the sieve holes of the multi-layer bed surface sieve plate is also inconvenient; in addition, the existing sorting bed is equipped with a vibration exciter, which drives the sorting bed to vibrate. , but the sorting effect of this vibration method is general.

In my country and around the world, there are a large number of fine coal deposits in geological mines. In order to improve the coal quality, a dry separation system suitable for sorting fine coal is urgently needed.

SUMMARY OF THE INVENTION

Based on the problems existing in the prior art, the present invention provides a dry separation system suitable for separating fine coal, which has good screening effect and convenient cleaning of screen holes.

According to the technical solution of the present invention, the present invention provides a dry separation system suitable for sorting fine coal, which comprises a separation bed, and is characterized in that the dry separation system suitable for sorting fine coal It also includes a driving device, a sieve plate and a feeding device, wherein the driving device is a driving motor, sieve holes are distributed on the sieve plate, the sieve plate with sieve holes is installed on the sorting bed, and the feeding device transports the fine coal to the On the separation bed body, the separation bed body vibrates under the driving of the driving device and is used for separation of fine coal; the dry separation system suitable for separation of fine coal further includes a front-stage separation system, the The front-stage separation system is a dry separation system for sorting raw coal. The raw coal including large block diameter is roughly sorted, and the small-size lump coal and fine coal after rough separation are sent to the latter stage for final coal sorting. In the system; the front-stage sorting system has a lump coal lever system, which is used for the sorting and shifting of lump coal; a dry sorting system suitable for sorting the final coal is characterized in that it also includes a base, the A number of hinge rods are hinged on the base, and one end of the hinge rods away from the base is hinged with the sorting bed body; four hinge rods are provided, and the four hinge rods are respectively arranged at the four corners of the base; the base A support base is fixed on the support base, a drive motor is fixed on the support base, a drive cam is fixed on the rotating shaft of the drive motor, the drive cam is arranged under the sorting bed, and the outer wall of the drive cam is connected to the sorting The lower side of the bed body is in contact; the drive motor drives the drive cam to rotate, and the rotational speed of the cam is driven by the drive motor to adjust the vibration frequency of the sorting bed body; the support seat is provided with two, two of the support The seats are on the front and rear sides of the base; a driving motor is fixed on each support seat, and a driving cam is fixed on the rotating shaft of each driving motor.

Further, the drive motor is a vibration device or a vibration excitation device.

Further, a dry separation system suitable for sorting end coal further includes a clean coal discharge end, a medium coal discharge end and a gangue discharge end, which are respectively used to separate the sorted clean coal, medium coal and gangue. The gangue is discharged.

Preferably, a sieve plate is installed on the sorting bed, and the sieve plate is provided with several rows of sieve hole groups. Ventilation holes are arranged between the hole groups, the ventilation holes communicate with the sieve holes in the adjacent sieve hole groups through connecting holes, and a ventilation device is connected to the ventilation holes.

Further, a rotating trachea is rotatably connected in each of the ventilation holes, the side wall of the rotating trachea is provided with a rotating hole corresponding to the connecting hole, the rotating trachea includes a sealing end and a communicating end, and the sieve plate has a The outer side is provided with a main pipe, the side wall of the main pipe is provided with a connecting pipe body corresponding to the rotating air pipe one-to-one, the communicating end of the rotating air pipe is inserted into the corresponding connecting pipe body, and the ventilation device passes through the main pipe to the rotating air pipe. Internal ventilation.

Further, a fixed plate is fixed on the sealing end of the rotating air pipe, a driven gear is fixed on the communicating end of the rotating air pipe, a telescopic cylinder is fixed on the main pipe, and a driving rack is fixed on the piston rod of the telescopic cylinder. , each of the driven gears meshes with the drive rack.

Further, a fixed block is fixed on the outer wall of the sieve plate, and the fixed block is provided with a chute for the driving rack to pass through.

Compared with the prior art, the beneficial effects of a dry separation system suitable for sorting fine coal of the present invention are:

(1) Since the driving cam supports the sorting bed, the rotation of the driving cam can drive the vibration of the sorting bed as a whole, and the vibration effect is good;

(2) The ventilation device can ventilate into the ventilation hole, and then the air is blown into the sieve hole from the communication hole, and the material blocked in the sieve hole can be blown clean;

(3) The telescopic cylinder can drive the drive rack to move laterally, thereby driving the rotation of the rotating air pipe, thereby controlling the rotation angle of the rotating air pipe. When the blowing in the screen hole is not needed, the rotating air pipe can be rotated so that the rotating hole does not The connecting holes are connected to prevent coal from entering the ventilation holes during the screening process.

Description of drawings

1 is a schematic structural diagram of Embodiment 1 of the dry separation device of the present invention;

Fig. 2 is the structural representation of another angle of Fig. 1;

3 is a schematic structural diagram of a sieve plate in Embodiment 1 of the dry separation device of the present invention;

Fig. 4 is the partial enlarged view of I place in Fig. 3;

Fig. 5 is the top view of Fig. 4;

Figure 6 is a cross-sectional view at A-A in Figure 5;

Fig. 7 is the partial enlarged view of II place in Fig. 6;

Fig. 8 is a partial enlarged view at III in Fig. 6;

FIG. 9 is a schematic structural diagram of Embodiment 2 of the dry separation apparatus of the present invention.

In the figure: 1. Sorting bed; 2. Hinged rod; 3. Base; 4. Support seat; 5. Driving motor; 6. Driving cam; 7. Screen plate; 8. Connecting hole; 9. Screen hole; 10 , main pipe; 11, connecting pipe body; 12, rotating air pipe; 13, driven gear; 14, telescopic cylinder; 15, driving rack; 16, fixing block; 17, chute; 18, rotating hole; 19, vent hole 20, fixed plate; 21, second drive shaft; 22, driven sprocket; 23, connecting chain; 24, driving sprocket; 25, first drive shaft.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The present invention provides a dry separation system suitable for separation of fine coal, wherein the ventilation device can ventilate into the ventilation holes, and then the air is blown into the sieve holes from the communication holes, and the material blocked in the sieve holes can be blown clean. ; The telescopic cylinder can drive the drive rack to move laterally, thereby driving the rotation of the rotating air pipe, thereby controlling the rotation angle of the rotating air pipe. When the blowing in the screen hole is not needed, the rotating air pipe can be rotated so that the rotating hole is not connected to the connecting hole. Connected to prevent coal from entering the ventilation holes during the screening process.

The present invention provides a dry separation system suitable for sorting the fine coal, which is not only suitable for the dry separation of the fine coal, but also can be combined with the existing dry separation device to realize the classification of raw coal. Separation, that is, the raw coal mixed with lump coal and fine coal is firstly processed by the applicant's dry separation equipment or process, and then the present invention is used to further classify the fine coal with high quality. Furthermore, a dry separation system suitable for sorting fine coal can also be independently applied to the separation of small lump coal and fine coal.

A dry sorting system suitable for sorting fine coal includes a sorting bed, a driving device, a sieve plate and a feeding device, wherein the driving device is preferably a driving motor, and the driving motor is preferably a vibration device or an excitation device. There are sieve holes distributed on the top, the sieve plate with sieve holes is installed on the sorting bed, the feeding device transports the fine coal to the sorting bed, and the sorting bed is driven by the driving device to vibrate and be used for Separation of the final coal. Further, a dry separation system suitable for sorting the final coal includes a front-stage separation system, the front-stage separation system is a dry separation system for separation of raw coal, and the raw coal including large block diameters is processed. Rough separation, the small particle size lump coal and fine coal after coarse separation are sent to the final coal separation system of the latter stage. The front-stage sorting system has a lump coal lever system, which is used for the sorting and shifting of the lump coal. A dry separation system suitable for sorting final coal further comprises a clean coal discharge end, a medium coal discharge end and a gangue discharge end, which are used to discharge the sorted clean coal, medium coal and gangue respectively. .

In the following, referring to the accompanying drawings, only the fine coal sorting mechanism of the dry separation system suitable for sorting fine coal will be further described in detail. As shown in Fig. 1-Fig. 9, a dry separation system suitable for separating fine coal includes the following technical solutions of Embodiment 1 and Embodiment 2.

Example 1:

As shown in Figures 1 to 8, a dry separation system suitable for sorting fine coal includes a separation bed 1, a base 3 arranged below the separation bed 1, and the base 3 is hinged with a number of hinges Rod 2, in this embodiment, four hinge rods 2 are provided, and the four hinge rods 2 are respectively arranged at the four corners of the base 3, and one end of the hinge rod 2 away from the base 3 is hinged with the sorting bed 1, A support base 4 is fixed on the base 3, a drive motor 5 is fixed on the support base 4, and a drive cam 6 is fixed on the rotating shaft of the drive motor 5. The drive cam 6 is arranged under the sorting bed 1, and the outer wall of the drive cam 6 The lower side surface of the sorting bed body 1 is in contact with each other.

The driving motor 5 drives the driving cam 6 to rotate. Since the driving cam 6 supports the sorting bed 1, the rotation of the driving cam 6 can drive the whole vibration of the sorting bed 1, and the vibration effect is good. The rotation speed of the cam 6 can be driven by the driving motor 5, so as to adjust the vibration frequency of the sorting bed 1, so that the sorting bed 1 can better sort coal.

As shown in FIG. 2 , there are two support bases 4 , the two support bases 4 are on the front and rear sides of the base 3 , and a drive motor 5 is fixed on each support base 4 , and the rotating shaft of each drive motor 5 is The drive cam 6 is fixed.

As shown in Fig. 3-Fig. 8, a sieve plate 7 is installed on the sorting bed 1, and the sieve plate 7 is provided with several rows of 9 groups of sieve holes. The 9 groups of sieve holes in the row include several sieve holes 9 arranged in sequence along the longitudinal direction of the sieve plate 7. There are ventilation holes 19 between the adjacent two groups of sieve holes 9 groups. The sieve holes 9 are communicated through the connecting holes 8, and the ventilation holes 19 are connected with a ventilation device.

As shown in Figures 3-8, the ventilation device can ventilate into the ventilation hole 19, and then the air is blown into the screen hole 9 from the communication hole, so that the material blocked in the screen hole 9 can be blown clean. It is very convenient to clean the materials in the sieve hole 9, and there is no need to disassemble the sieve plate 7 from the sorting bed 1 for cleaning.

As shown in FIGS. 3-8 , each vent hole 19 is rotatably connected with a rotating trachea 12 , the side wall of the rotating trachea 12 is provided with a rotating hole 18 corresponding to the connecting hole 8 , and the rotating trachea 12 includes a sealing end and a communicating end , the outer side of the sieve plate 7 is provided with a main pipe 10, the side wall of the main pipe 10 is provided with a connecting pipe body 11 corresponding to the rotating air pipe 12, the connecting end of the rotating air pipe 12 is inserted with the corresponding connecting pipe body 11, and the ventilation device Ventilation into the rotating trachea 12 is carried out through the manifold 10 .

As shown in Fig. 3-Fig. 8, when the air blowing in the screen hole 9 is not required, the rotating air pipe 12 can be rotated so that the rotating hole 18 is not communicated with the connecting hole 8, thereby preventing coal from entering the ventilation hole 19 during the screening process. Inside.

As shown in FIGS. 3-8 , a fixed plate 20 is fixed on the sealing end of the rotating air pipe 12 , a driven gear 13 is fixed on the communicating end of the rotating air pipe, a telescopic cylinder 14 is fixed on the main pipe 10 , and a piston rod of the telescopic cylinder 14 is fixed on There are driving racks 15 , and each driven gear 13 meshes with the driving racks 15 . The telescopic cylinder 14 can drive the drive rack 15 to move laterally, thereby driving each driven gear 13 to rotate, and each driven gear 13 drives the corresponding rotating air pipe 12 to rotate, thereby controlling the rotation angle of the rotating air pipe 12 .

As shown in FIG. 4 , a fixing block 16 is fixed on the outer wall of the screen plate 7 , and the fixing block 16 is provided with a chute 17 for the driving rack 15 to pass through.

Embodiment 2:

As shown in FIG. 9 , the difference between this embodiment and the first embodiment is that the arrangement of the support bases 4 is different. There are four support bases 4 , and the four support bases 4 are respectively arranged at the four corners of the base 3 , located at the corners of the base 3 . A first drive shaft 25 is rotatably connected between the two front support bases 4, and a second drive shaft 21 is rotatably connected between the two rear support bases 4. Both the first drive shaft 25 and the second drive shaft 21 are connected to each other. Two driving cams 6 are fixed, and the four driving cams 6 are respectively at the four corners of the sorting bed 1. The driving motor 5 drives the first driving shaft 25 to rotate, and the driving sprocket 24 is fixed on the first driving shaft 25. , a driven sprocket 22 is fixed on the second drive shaft 21 , and a connecting chain 23 is connected between the driving sprocket 24 and the driven sprocket 22 .

The drive motor 5 drives the first drive shaft 25 to rotate, the rotation of the first drive shaft 25 drives the drive sprocket 24 to rotate, the rotation of the drive sprocket 24 drives the driven sprocket 22 to rotate through the connecting chain 23, and the driven sprocket 22 drives the first sprocket 22 to rotate. The two drive shafts 21 rotate. Therefore, one driving motor 5 drives the four driving cams 6 to rotate, and the structure is simpler.

Compared with the prior art, a dry separation system suitable for sorting fine coal of the present invention is a pioneering proposal that a fixed block is fixed on the outer wall of the sieve plate, and the fixed block is provided with a driving rack to pass through. Chute. The setting of the chute and the fixed block further improves the self-cleaning function of the sieve plate and reduces the possibility of clogging of the sieve hole. Further, four support bases are provided, and the four support bases are respectively arranged at four corners of the base, which improves the site adaptability of the dry separation system for sorting fine coal. The working place where the dry separation system is located is generally near the coal outlet of the coal mine, and the coal mine is generally located in the outer suburbs or in the wild, and it is rarely or impossible to be in the urban area or the living area of the residents, so its geological conditions are very poor; The production cost and the improvement of production efficiency are basically based on the installation of sorting equipment according to local conditions. The setting of the support seat improves the site adaptability of the dry separation system for sorting the final coal.

Compared with the prior art, a dry separation system suitable for sorting fine coal of the present invention is pioneering in that a first drive shaft is rotatably connected between the two support bases located in the front, and the two support bases located at the back A second drive shaft is rotatably connected therebetween, and two drive cams are fixed on the first drive shaft and the second drive shaft. The four drive cams are respectively located at the four corners of the sorting bed, and the drive motor drives the The first drive shaft rotates, a driving sprocket is fixed on the first driving shaft, and a driven sprocket is fixed on the second driving shaft, and a connecting chain is connected between the driving sprocket and the driven sprocket. These designs completely eliminate the possibility of clogging the screen holes during the sorting of fine coal, and improve the continuous non-stop working performance of dry separation systems suitable for sorting fine coal.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (4)

1. A dry separation system suitable for separating slack coal comprises a separation bed body and is characterized by further comprising a driving device, a sieve plate and a feeding device, wherein the driving device is a driving motor, sieve holes are distributed in the sieve plate, the sieve plate with the sieve holes is installed on the separation bed body, the feeding device conveys the slack coal to the separation bed body, and the separation bed body is driven by the driving device to vibrate and is used for separating the slack coal;

the dry separation system suitable for separating the slack coal further comprises a preceding stage separation system, the preceding stage separation system is a dry separation system for separating raw coal, the raw coal with large block size is roughly separated, and the small-particle size block coal and the slack coal after rough separation are sent to a subsequent stage slack coal separation system; the pre-stage sorting system is provided with a lump coal deflector rod system which is used for sorting and deflecting lump coal;

the sorting bed further comprises a base, wherein a plurality of hinged rods are hinged to the base, and one ends of the hinged rods, which are far away from the base, are hinged to the lower part of the sorting bed body; four hinge rods are arranged at four corners of the base respectively; a supporting seat is fixed on the base, a driving motor is fixed on the supporting seat, a driving cam is fixed on a rotating shaft of the driving motor, the driving cam is arranged below the sorting bed body, and the outer wall of the driving cam is abutted against the lower side surface of the sorting bed body; the driving motor drives the driving cam to rotate, and the rotating speed of the cam is driven by the driving motor, so that the vibration frequency of the sorting bed body is adjusted;

the two supporting seats are arranged on the front side and the rear side of the base; a driving motor is fixed on each supporting seat, and a driving cam is fixed on a rotating shaft of each driving motor; the sorting bed body is provided with a sieve plate, the sieve plate is provided with a plurality of sieve hole groups, the sieve hole groups are sequentially arranged along the transverse direction of the sieve plate, an air vent is arranged between every two adjacent sieve hole groups, the air vent is communicated with sieve holes in the adjacent sieve hole groups through connecting holes, and the air vent is connected with an air breather; a rotating air pipe is rotatably connected in each air hole, a rotating hole corresponding to the connecting hole is formed in the side wall of each rotating air pipe, each rotating air pipe comprises a sealing end and a communicating end, a header pipe is arranged on the outer side of the sieve plate, connecting pipe bodies corresponding to the rotating air pipes one by one are arranged on the side wall of the header pipe, the communicating ends of the rotating air pipes are inserted into the corresponding connecting pipe bodies, and the ventilating device ventilates the rotating air pipes through the header pipe;

the fixed plate is fixed at the sealing end of the rotating air pipe, the driven gear is fixed at the communicating end of the rotating air pipe, the telescopic cylinder is fixed on the header pipe, the driving rack is fixed on the piston rod of the telescopic cylinder, and each driven gear is meshed with the driving rack.

2. The dry separation system for separating slack coal according to claim 1, wherein the drive motor is a vibrating device or an excitation device.

3. The dry separation system for separating slack coal according to claim 1, wherein the dry separation system for separating slack coal further comprises a clean coal discharge end, a middlings discharge end and a gangue discharge end for discharging separated clean coal, middlings and gangue respectively.

4. The dry separation system for fine coal suitable for separating according to claim 1, wherein a fixed block is fixed on the outer wall of the sieve plate, and a chute for the driving rack to pass through is arranged on the fixed block.

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