CN217042960U - Pre-screening and crushing system for clean coal products of sorting system blocks of coal preparation plant - Google Patents
Pre-screening and crushing system for clean coal products of sorting system blocks of coal preparation plant Download PDFInfo
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- CN217042960U CN217042960U CN202122315031.4U CN202122315031U CN217042960U CN 217042960 U CN217042960 U CN 217042960U CN 202122315031 U CN202122315031 U CN 202122315031U CN 217042960 U CN217042960 U CN 217042960U
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Abstract
The utility model discloses a pre-screening and crushing system for clean coal products of a sorting system block of a coal preparation plant, which comprises a heavy-medium shallow groove sorting machine, a medium removing screen, a scraper, a crusher, a belt conveyor, a ground pin bin, a screening machine and a product bin; an opening is formed in the bottom of the scraper conveyor, a fixed sieve is fixedly arranged at the opening, a chute is fixedly arranged below the opening, and the discharge end of the chute is positioned right above the feeding end of the belt conveyor. Has the advantages that: the opening is formed in the bottom of the scraper conveyor, and the fixed sieve is arranged, so that the washed clean coal can be pre-screened, the amount of the washed clean coal with the particle size of less than 50mm entering the crusher is greatly reduced, the feeding amount of the crusher and the screening machine is reduced, and the crushing efficiency of the crusher is improved; meanwhile, the number of the crusher can be reduced, so that the power consumption of the crusher is reduced; in addition, the excessive crushing amount is reduced, the dust content of the lump clean coal is further reduced, the quality and the selling price of the clean coal product are improved, and the sales income is increased.
Description
The technical field is as follows:
the utility model relates to a broken system of piece cleaned coal product screening especially relates to a broken system of screening in advance of system piece cleaned coal product is selected separately to coal preparation plant.
The background art comprises the following steps:
the method mainly comprises the steps of separating impurities from clean coal by a heavy-medium shallow slot separator, dehydrating and medium-removing the separated 13-200 mm clean coal by a medium-removing sieve, crushing the cleaned coal by a clean coal crusher (the gap between tooth rollers of the crusher is 50mm), producing 0-50 mm clean coal products, transporting and transferring the cleaned coal products by a belt, carrying out 13mm grading screening operation on a ground pin bin, and storing and transporting the 13-50 mm oversize products which become the clean coal products in the bin.
In the production operation, the following data are obtained through the screening test of the materials on the clean coal medium removal screen and the discharge of the clean coal crusher:
TABLE 1 clean coal medium-removing screen material granularity composition
| Size fraction (mm) | Percentage of the main component (%) |
| 13-25 | 11.26 |
| 25-50 | 14.91 |
| 50-100 | 60.39 |
| 100-200 | 13.44 |
TABLE 2 discharge particle size composition of clean coal crusher
| Size fraction (mm) | Percentage of the main component (%) |
| 0-13 | 30.89 |
| 13-25 | 22.83 |
| 25-50 | 44.12 |
| ≥50 | 2.16 |
As can be seen from the screening data in tables 1 and 2, the proportion of 13-50 mm size fraction clean coal in the clean coal de-medium screen material is 26.17% of the total amount, and the proportion of 0-13 mm size fraction material in the discharge of the clean coal crusher is up to 30.89%. Therefore, the following problems mainly exist:
1. when 13-200 mm of clean coal enters the clean coal crusher to be crushed, the clean coal smaller than 50mm of tooth roller gap is crushed again under the action of extrusion force between coal and impact force between the tooth roller and the coal, and the phenomenon of over-crushing in discharging is serious.
2. The crushed clean coal enters a grading screen on a ground pin bin, the screening amount of the grading screen is increased due to the over-crushing phenomenon, the material layer of the screen is thickened, and the screening effect is poor. Finally, the content of the feed material below-13 mm in the screening equipment on the ground bin is increased, and the finished coal content of the block is higher.
The utility model has the following contents:
an object of the utility model is to provide a coal preparation plant selects separately system piece clean coal product and sieves broken system in advance.
The utility model discloses by following technical scheme implement:
the pre-screening and crushing system for clean coal products of the sorting system block of the coal preparation plant comprises a heavy-medium shallow-groove sorting machine, a medium-removing screen, a scraper machine, a crusher, a belt conveyor, a ground pin bin, a screening machine and a product bin;
an overflow port of the heavy-medium shallow-groove separator is communicated with a feed port of the medium removing sieve, an oversize product outlet of the medium removing sieve is communicated with a feed port of the scraper, a discharge port of the scraper is communicated with a feed port of the crusher, a discharge port of the crusher is positioned right above a feeding end of the belt conveyor, a discharge end of the belt conveyor is positioned right above a feed port of the ground pin bin and is communicated with a feed port of the product bin, a discharge port of the ground pin bin is positioned right above a feed port of the screening machine, and an oversize product outlet of the screening machine is communicated with an inlet of the product bin;
the bottom of the scraper conveyor is provided with an opening, a fixed sieve is fixedly arranged at the opening, a chute is fixedly arranged below the opening, and a discharge end of the chute is positioned right above a feeding end of the belt conveyor.
Furthermore, a plurality of openings are formed in the bottom of the scraper conveyor along the advancing direction of the materials.
Further, the fixed screen is a wedge-shaped bar screen. Further, the size of the opening is 2000mm × 1200 mm.
Further, the mesh size of the fixed screen is 580mm × 50 mm.
The utility model has the advantages that:
the opening is formed in the bottom of the scraper conveyor, and the fixed sieve is arranged, so that the washed clean coal can be pre-screened, the amount of the washed clean coal with the particle size of less than 50mm entering the crusher is greatly reduced, the feeding amount of the crusher and the screening machine is reduced, and the crushing efficiency of the crusher is improved; meanwhile, the equipment number of the crusher can be reduced, so that the power consumption of the equipment is reduced; in addition, the excessive crushing amount is reduced, the dust content of the lump clean coal is further reduced, the quality and the selling price of the clean coal product are improved, and the sales income is increased.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of the system connection of the present embodiment;
in the figure: heavy-medium shallow-groove separator 1, medium removing sieve 2, scraper 3, crusher 4, belt conveyor 5, ground pin bin 6, sieving machine 7, product bin 8, opening 9, fixed sieve 10 and chute 11.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1:
the system for pre-screening and crushing clean coal products of the separation system block of the coal preparation plant shown in fig. 1 comprises a heavy-medium shallow groove separator 1, a medium removing sieve 2, a scraper 3, a crusher 4, a belt conveyor 5, a ground pin bin 6, a screening machine 7 and a product bin 8;
an overflow port of the heavy-medium shallow-groove sorting machine 1 is communicated with a feeding port of a medium removing sieve 2, an oversize outlet of the medium removing sieve 2 is communicated with a feeding port of a scraper 3, a discharging port of the scraper 3 is communicated with a feeding port of a crusher 4, the discharging port of the crusher 4 is positioned right above a feeding end of a belt conveyor 5, the discharging end of the belt conveyor 5 is positioned right above a feeding port of a ground pin bin 6 and is communicated with the feeding port of the ground pin bin 6, the discharging port of the ground pin bin 6 is positioned right above a feeding port of a screening machine 7, and an oversize outlet of the screening machine 7 is communicated with an inlet of a product bin 8;
a plurality of openings 9 are formed in the bottom of the scraper conveyor 3 along the advancing direction of materials, and the size of each opening 9 is 2000mm multiplied by 1200 mm. The fixed sieve 10 that is equipped with in opening 9 department, fixed sieve 10 are wedge-shaped stick screen cloth, and the width of the stick of fixed sieve 10 on the horizontal direction diminishes from last to down gradually, can guarantee that the coal cinder passes through smoothly, can not take place the card on fixed sieve 10 and hinder the phenomenon. The mesh size of the fixed screen 10 is 580mm x 50 mm. Because the washed coal has irregular granularity and larger hardness and is very easy to block the sieve pores, the rod sieve with stronger anti-blocking capability is selected. A chute 11 is fixedly arranged below the opening 9, and the discharge end of the chute 11 is positioned right above the feeding end of the belt conveyor 5.
In the embodiment, the opening 9 is formed in the bottom of the scraper 3, the fixed sieve 10 is arranged, washed clean coal can be pre-screened, part 13-50 mm of the washed clean coal at the lower part of a coal bed in a groove box of the scraper 3 passes through the fixed sieve 10 and then is conveyed to the belt conveyor 5 through the chute 11 for transportation, according to the long-term operation condition, washed clean coal products pre-screened by the scraper 3 account for 1/3 of the feeding amount of the scraper 3, and the rest washed clean coal with larger particle size enters the crusher 4 to be crushed into washed clean coal below 50mm and then is transported by the belt conveyor 5, so that the amount of the washed clean coal with particle size below 50mm entering the crusher 4 is greatly reduced, the feeding amount of the clean coal crusher 4 is reduced, the processing load of the crusher 4 and the screening machine 7 is reduced, and the crushing efficiency of the crusher 4 is improved; meanwhile, the excessive crushing amount is reduced, the dust content of the lump clean coal is reduced, the quality penalty caused by large dust content is reduced, the product benefit is improved, and the sales income is increased.
After this embodiment improves, can effectively reduce and get into 13 ~ 50mm coal volume about 8% of breaker, and then reduce the nearly 5% of rate under the clean coal particle size limit, improve the quality and the selling price of clean coal product. The method is calculated according to the fact that 150 ten thousand tons of clean coal are sold all year round, the price of each ton of clean coal is increased by 25 yuan, and the sales income can be increased by 3750 ten thousand yuan all year round. Meanwhile, the feeding amount of the crusher 4 is reduced, and then 1 existing crusher 4 can be shut down, so that the power consumption of equipment is reduced, the power of the shut-down crusher 4 is 110kw, and the electricity cost is predicted to be saved by 110 × 16 × 330.52 to 30.2 ten thousand yuan in the whole year according to the calculation of 16h of production per day and 330 days of production in the whole year.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The pre-screening and crushing system for clean coal products of the sorting system block of the coal preparation plant is characterized by comprising a heavy-medium shallow-groove sorting machine, a medium-removing screen, a scraper machine, a crusher, a belt conveyor, a ground pin bin, a screening machine and a product bin;
an overflow port of the heavy-medium shallow-groove separator is communicated with a feed port of the medium removing sieve, an oversize product outlet of the medium removing sieve is communicated with a feed port of the scraper, a discharge port of the scraper is communicated with a feed port of the crusher, a discharge port of the crusher is positioned right above a feeding end of the belt conveyor, a discharge end of the belt conveyor is positioned right above a feed port of the ground pin bin and is communicated with a feed port of the product bin, a discharge port of the ground pin bin is positioned right above a feed port of the screening machine, and an oversize product outlet of the screening machine is communicated with an inlet of the product bin;
the bottom of the scraper conveyor is provided with an opening, a fixed sieve is fixedly arranged at the opening, a chute is fixedly arranged below the opening, and the discharge end of the chute is positioned right above the feeding end of the belt conveyor.
2. The system of claim 1, wherein the scraper has a plurality of openings in the bottom thereof along the direction of travel of the material.
3. The coal preparation plant separation system lump clean coal product pre-screening crushing system of claim 1, wherein the fixed screen is a wedge-shaped bar screen.
4. The coal preparation plant separation system lump clean coal product pre-screening crushing system of any one of claims 1 to 3, wherein the size of the opening is 2000mm x 1200 mm.
5. The coal preparation plant separation system lump clean coal product pre-screening crushing system of claim 4, wherein the screen hole size of the fixed screen is 580mm x 50 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122315031.4U CN217042960U (en) | 2021-09-23 | 2021-09-23 | Pre-screening and crushing system for clean coal products of sorting system blocks of coal preparation plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122315031.4U CN217042960U (en) | 2021-09-23 | 2021-09-23 | Pre-screening and crushing system for clean coal products of sorting system blocks of coal preparation plant |
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| Publication Number | Publication Date |
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| CN217042960U true CN217042960U (en) | 2022-07-26 |
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| CN202122315031.4U Active CN217042960U (en) | 2021-09-23 | 2021-09-23 | Pre-screening and crushing system for clean coal products of sorting system blocks of coal preparation plant |
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| CN (1) | CN217042960U (en) |
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2021
- 2021-09-23 CN CN202122315031.4U patent/CN217042960U/en active Active
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