CN111822139A - Coal washing system is gone into in coal preparation plant to cooperation of middling coal and lump coal - Google Patents
Coal washing system is gone into in coal preparation plant to cooperation of middling coal and lump coal Download PDFInfo
- Publication number
- CN111822139A CN111822139A CN202010702143.2A CN202010702143A CN111822139A CN 111822139 A CN111822139 A CN 111822139A CN 202010702143 A CN202010702143 A CN 202010702143A CN 111822139 A CN111822139 A CN 111822139A
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- Prior art keywords
- coal
- middling
- lump
- lump coal
- belt
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 182
- 239000003245 coal Substances 0.000 title claims abstract description 182
- 238000005406 washing Methods 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 56
- 241000273930 Brevoortia tyrannus Species 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 41
- 210000000614 Ribs Anatomy 0.000 claims description 8
- 239000010883 coal ash Substances 0.000 claims description 8
- 239000002956 ash Substances 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 239000003818 cinder Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003467 diminishing Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004301 light adaptation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 230000003068 static Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/85—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with two or more stirrers on separate shafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/92—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with helices or screws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B11/00—Feed or discharge devices integral with washing or wet-separating equipment
Abstract
The invention discloses a matched washing system of middlings and lump coals in a coal preparation plant, wherein a middling crusher is sequentially connected with a middling bunker, a middling feeder and a middling belt; the discharge ends of the middling belt and the lump coal belt are connected with a coal blending and mixing device, and the discharge end of the coal blending and mixing device is connected with a coal washing device; the middling belt and the lump coal belt are respectively provided with a moisture tester, an ash content meter and a nucleon scale; moisture apparatus, ash content appearance and nuclear scale all with feedback control device's signal input part electric connection, middlings batcher and lump coal batcher all with feedback control device's signal output part electric connection. The invention mixes the medium coal and the lump coal according to a certain coal blending ratio for washing, increases the coal washing quantity on the basis of ensuring the quality of clean coal, improves the processing capacity of a coal preparation plant, and increases the enterprise benefit.
Description
Technical Field
The invention relates to the technical field of coal washing, in particular to a matched washing system of coal and lump coal in a coal preparation plant.
Background
The coal washing process of the existing coal preparation plant adopts a heavy medium-flotation combined treatment process, the existing process only carries out single washing on lump coal or middlings, and the washing process has the following problems: firstly, lump coal is washed and selected independently, so that the manual selection part of equipment in a coal preparation plant has overlarge load, the processing capacity in unit time is low, the effective utilization rate of the equipment is low, the work efficiency of the whole worker is reduced, and the production cost is high; and secondly, the middlings are washed separately, so that the yield of washed clean coal is low, the yield of middlings is high, and the comprehensive treatment capability is influenced.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the matched washing system of the middling coal and the lump coal in the coal preparation plant, the middling coal and the lump coal are mixed and washed according to a certain coal blending ratio, the coal washing quantity is increased on the basis of ensuring the quality of clean coal, the processing capacity of the coal preparation plant is improved, and the enterprise benefit is increased.
The technical scheme is as follows: in order to achieve the purpose, the matched washing system of the middlings and the lump coals in the coal preparation plant comprises a middling crusher, a middling bin, a middling feeder, a middling belt, a lump coal hand-selection system, a lump coal crusher, a lump coal bin, a lump coal feeder, a lump coal belt, a feedback control device, a coal blending mixing device and a coal washing device; the middling pulverizer is sequentially connected with the middling bunker and the middling feeder, the feed end of the middling belt is connected with the middling feeder, and the discharge end of the middling belt is connected with the coal blending and mixing device; lump coal enters the lump coal crusher after passing through the lump coal hand selection system, the lump coal crusher is sequentially connected with the lump coal storage bin and the lump coal feeder, the feed end of the lump coal belt is connected with the lump coal feeder, and the discharge end of the lump coal belt is connected with the coal blending and mixing device; the discharge end of the coal blending and mixing device is connected with the coal washing device; the middling belt is provided with a middling moisture tester, a middling ash tester and a middling nuclear scale, and the lump coal belt is provided with a lump coal moisture tester, a lump coal ash tester and a lump coal nuclear scale; the middling moisture tester, the middling ash content tester, the middling nuclear scale, the lump coal moisture tester, the lump coal ash content tester and the lump coal nuclear scale are all electrically connected with the signal input end of the feedback control device, and the signal output end of the feedback control device is electrically connected with the middling feeder and the lump coal feeder.
Further, the coal blending and mixing device comprises an outer support frame, a feeding cylinder, a stirring cylinder and a distributing block; the feeding cylinder is rotatably erected above the outer support frame and is driven to rotate by a rotating motor; the inner part of the feeding cylinder is funnel-shaped, a discharge hole at the lower end of the feeding cylinder is communicated with a feed hole at the upper end of the stirring cylinder, and an electric stirring rod is arranged in the stirring cylinder; the distributing block is positioned at a discharge port at the lower end of the feeding cylinder and is fixedly connected with the outer support frame; the upper end of the distributing block is conical, and the distributing block divides a discharge hole at the lower end of the feeding cylinder into rings; the discharge ends of the middling belt and the lump coal belt are correspondingly positioned right above the funnel-shaped inner wall of the feeding barrel.
Furthermore, the funnel-shaped inner wall of the feeding cylinder and the upper surface of the distributing block are provided with a plurality of spiral outer convex ribs which are arranged at equal angles in the circumferential direction, and the spiral directions of the outer convex ribs are opposite.
Furthermore, a spatial spiral stirring blade is arranged on the electric stirring rod.
Further, stirring vane's pitch is from last trend that is the diminishing gradually down, stirring vane's radius is from last trend that is the crescent down.
Further, the bearing chassis of churn is oblate cylindrical structure, and oblate cylindrical structure's upper surface is the non-horizontal plane, and satisfies the circular arc tangent line end that at least a pair of kept away from each other and forms the difference in height of the biggest vertical direction, and the bearing chassis passes through the movable connecting block and is movably connected with electric stirring rod.
Furthermore, the upper surface of the bearing chassis is in an elliptical shape formed by straight line beveling.
Further, the upper surface of the bearing chassis is a nonlinear surface gradient surface.
Has the advantages that: the invention discloses a system for matching and washing coal and lump coal in a coal preparation plant, which has the following beneficial effects:
1) the automation degree is high, the data acquisition is timely, accurate and comprehensive, the mixing ratio of the washed lump coal and the middlings is timely fed back and adjusted through the data, and the quality of clean coal can be effectively guaranteed;
2) the middling coal and the lump coal are mixed and washed according to a certain coal mixing ratio, and according to different particle size distributions, the coal washing and dressing treatment capacity can be effectively increased, the washing and dressing efficiency is improved, the treatment capacity is increased, and the coal washing and dressing cost is reduced;
3) the coal blending mixing equipment adopts an upper feeding cylinder as rotary feeding, and a discharge hole of the feeding cylinder is annular, so that the coal blending mixing equipment can play a role in mixing middlings and lump coals; the electric stirring rod in the stirring cylinder below is provided with a stirring blade with a spiral space, so that the stirring effect is good, the pitch of the stirring blade is large and small, the coal briquette can be easily stirred under the compression, and the structure setting is more reasonable.
Drawings
FIG. 1 is a schematic diagram of a system for washing and mixing middlings and lump coals according to the invention;
FIG. 2 is a schematic structural diagram of a coal blending and mixing device;
FIG. 3 is a schematic cross-sectional view of the interior of the coal blending and mixing apparatus;
fig. 4 is a schematic structural view of the electric stirring rod.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The system for matching and washing the middlings and the lump coals in the coal preparation plant as shown in the attached drawings 1 to 4 comprises a middling crusher 1, a middling bin 2, a middling feeder 3, a middling belt 4, a lump coal hand-selection system 5, a lump coal crusher 6, a lump coal bin 7, a lump coal feeder 8, a lump coal belt 9, a feedback control device 10, a coal blending mixing device 11 and a coal washing device 12.
The middlings pulverizer 1 is connected in order the middlings feed bin 2 and middlings batcher 3, the feed end of middlings belt 4 is connected the middlings batcher 3, the discharge end of middlings belt 3 is connected coal blending mixing arrangement 11. Lump coal is conveyed to a lump coal crusher 6 through a lump coal hand-selecting system 5, and the lump coal larger than or equal to 55mm is crushed to the following granularity, the lump coal crusher 6 is sequentially connected with the lump coal storage bin 7 and the lump coal feeder 8, the feed end of a lump coal belt 9 is connected with the lump coal feeder 8, and the discharge end of the lump coal belt 9 is connected with the coal blending mixing device 11; the discharge end of the coal blending and mixing device 11 is connected with the coal washing device 12;
the middling belt 4 is provided with a middling moisture tester 13, a middling ash tester 14 and a middling nuclear scale 15, and the lump coal belt 9 is provided with a lump coal moisture tester 16, a lump coal ash tester 17 and a lump coal nuclear scale 18; the middling moisture tester 13, the middling ash tester 14, the middling nuclear scale 15, the lump coal moisture tester 16, the lump coal ash tester 17 and the lump coal nuclear scale 18 are electrically connected with the signal input end of the feedback control device 10, and the signal output end of the feedback control device 10 is electrically connected with the middling feeder 3 and the lump coal feeder 8.
When the invention works, the selectivity curve data is obtained according to the float-sink test, the clean coal yield is calculated, and then the clean coal is washed according to the clean coal yield and the different particle sizes of the lump coal with large particle size and the medium coal with fine particle size. Moisture, ash content and quality in the middlings and the lump coals are detected by a middling moisture detector 13, a middling ash detector 14, a middling nuclear scale 15, a lump coal moisture detector 16, a lump coal ash detector 17 and a lump coal nuclear scale 18, detected data are transmitted to a feedback control device 10, and the feedback control device 10 calculates the dry coal amount mixed and washed respectively. The feedback control device 10 performs feedback control on the mixing ratio a and b of the crushed dry coal and the lump coal entering and washing coal through dynamic adjustment of the feeding amount of the middling coal feeder 3 and the lump coal feeder 8. Because the particle size distribution of the middling coal and the lump coal is different, the invention can greatly increase the coal washing quantity, improve the processing capacity of the coal preparation plant and increase the enterprise benefit.
As shown in fig. 2, the coal blending and mixing device 11 comprises an outer support frame 19, a feeding cylinder 20, a stirring cylinder 21 and a distributing block 22. As shown in fig. 2, the outer support frame 19 is fixedly installed on the bottom surface, and the outer support frame 19 is composed of a circular rotary installation support and a plurality of support legs. The feeding cylinder 20 is rotatably erected above the outer support frame 19 and is driven to rotate by a rotating motor 26. The outside of a feeding cylinder 20 is cylindrical, the inside is funnel-shaped, the lower end discharge gate of the feeding cylinder 20 is communicated with the upper end feed inlet of a mixing cylinder 21, and the upper end feed inlet of the mixing cylinder 21 is connected with an outer support frame 19 in a contacting manner. As shown in fig. 3, the mixing drum 21 is a vertical cylinder, and an oblique discharge port is provided below the mixing drum 21. An electric stirring rod 23 is arranged in the stirring barrel 21, a driving motor of the electric stirring rod 23 is arranged below the stirring barrel 21, and the upper end of the electric stirring rod 23 is in running fit with the lower end of the distributing block 22. The distributing block 22 is located at the discharge port at the lower end of the feeding cylinder 20 and is fixedly connected with the outer support frame 19. The upper end of the distributing block 22 is conical, and the lower end discharge hole of the feeding cylinder 20 is divided into rings by the distributing block 22. The discharge ends of the middling belt 4 and the lump coal belt 9 are correspondingly positioned right above the funnel-shaped inner wall of the feeding barrel 20. The discharge ends of the middling belt 4 and the lump coal belt 9 are generally disposed on both sides of the feed cylinder 20, respectively. The middlings and the lump coals fall into the funnel-shaped inner wall of the feeding cylinder 20 from the belt, and the middlings and the lump coals can uniformly enter the stirring cylinder 21 below from the annular discharge hole at the lower end of the feeding cylinder 20 due to the fact that the feeding cylinder 20 is rotatably arranged and the distributing block 22 is matched, and the middlings and the lump coals are primarily mixed and stirred uniformly.
The funnel-shaped inner wall of the feeding barrel 20 and the upper surface of the distributing block 22 are provided with a plurality of spiral outer convex ribs 24 which are arranged at equal angles in the circumferential direction, and the spiral directions of the outer convex ribs 24 are opposite. The arrangement of the external convex ribs 24 enables the funnel-shaped inner wall of the feeding cylinder 20 to have stronger grabbing and driving capacity on the lump coal and the middlings, and the middlings and the lump coal are driven to move and mix by the aid of the grabbing and driving capacity. The outward ribs 24 on the feed cylinder 20 and the distributor block 22 have opposite rotation directions and cooperate with each other to better mix the medium coal and the lump coal uniformly.
The electric stirring rod 23 is provided with a spiral stirring blade 25 for mixing and stirring the middlings and the lump coals.
Stirring vane 25's pitch is from last to being the trend that reduces gradually down, stirring vane 25's radius is from last to being the trend that gradually increases down, and the churn 21 below is because the effect of gravity coal cinder is easily pressurized and is piled up, and stirring vane 25's structure setting makes electric stirring rod 21 better to the stirring effect of the coal cinder of the inside below of churn 21, and overall structure is more reasonable. In order to achieve a better stirring of the coal, the shape of the support chassis 27 is substantially modified and, if necessary, is movable in a rotating manner. The bearing chassis 27 of the mixing drum 21 is of a flat cylindrical structure, the upper surface of the flat cylindrical structure is a non-horizontal plane, the height difference of the maximum vertical direction formed by at least one pair of mutually far arc tangent ends is met, the bearing chassis 27 is movably connected with the electric mixing rod 23 through a movable connecting block 28, and movable connection and non-movable connection are opened according to necessary conditions.
The upper surface of the supporting chassis 27 is in an elliptical shape formed by straight beveling. The upper surface of the supporting chassis 27 is a non-linear surface tapered surface. The structural configuration of the bearing chassis 27 of the two embodiments described above combines its ability to move and the change in pitch and radius of the stirring blades above, to comprehensively achieve the dynamic real-time changing stirring effect that the relative static effect of the prior art cannot achieve.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (8)
1. The utility model provides a system is washed in cooperation of coal among coal preparation plant and lump coal which characterized in that: the system comprises a middling pulverizer (1), a middling bin (2), a middling feeder (3), a middling belt (4), a lump coal hand-selecting system (5), a lump coal pulverizer (6), a lump coal bin (7), a lump coal feeder (8), a lump coal belt (9), a feedback control device (10), a coal blending and mixing device (11) and a coal washing device (12);
the middling pulverizer (1) is sequentially connected with the middling bunker (2) and the middling feeder (3), the feed end of the middling belt (4) is connected with the middling feeder (3), and the discharge end of the middling belt (3) is connected with the coal blending and mixing device (11); lump coal enters the lump coal crusher (6) after passing through the lump coal hand-sorting system (5), the lump coal crusher (6) is sequentially connected with the lump coal storage bin (7) and the lump coal feeder (8), the feed end of the lump coal belt (9) is connected with the lump coal feeder (8), and the discharge end of the lump coal belt (9) is connected with the coal blending and mixing device (11); the discharge end of the coal blending and mixing device (11) is connected with the coal washing device (12);
the middling belt (4) is provided with a middling moisture tester (13), a middling ash tester (14) and a middling nuclear scale (15), and the lump coal belt (9) is provided with a lump coal moisture tester (16), a lump coal ash tester (17) and a lump coal nuclear scale (18); the middling coal moisture tester (13), the middling coal ash tester (14), the middling coal nuclear scale (15), the lump coal moisture tester (16), the lump coal ash tester (17) and the lump coal nuclear scale (18) are electrically connected with a signal input end of the feedback control device (10), and a signal output end of the feedback control device (10) is electrically connected with the middling coal feeder (3) and the lump coal feeder (8).
2. The system for matched washing of coal and lump coal in a coal preparation plant according to claim 1, characterized in that: the coal blending and mixing device (11) comprises an outer support frame (19), a feeding cylinder (20), a stirring cylinder (21) and a distributing block (22); the feeding cylinder (20) is rotatably erected above the outer support frame (19) and is driven to rotate by a rotating motor (26); the inner part of the feeding cylinder (20) is funnel-shaped, a discharge hole at the lower end of the feeding cylinder (20) is communicated with a feed hole at the upper end of the stirring cylinder (21), and an electric stirring rod (23) is arranged in the stirring cylinder (21); the distributing block (22) is positioned at a discharge port at the lower end of the feeding cylinder (20) and is fixedly connected with the outer support frame (19); the upper end of the distributing block (22) is conical, and the lower end discharge hole of the feeding cylinder (20) is divided into rings by the distributing block (22); the discharge ends of the middling belt (4) and the lump coal belt (9) are correspondingly positioned right above the funnel-shaped inner wall of the feeding barrel (20).
3. The system for matched washing of coal and lump coal in a coal preparation plant according to claim 2, characterized in that: the hopper-shaped inner wall of the feeding barrel (20) and the upper surface of the distributing block (22) are provided with a plurality of spiral outer convex ribs (24) which are arranged at equal angles in the circumferential direction, and the spiral directions of the outer convex ribs (24) are opposite.
4. The system for matched washing of coal and lump coal in a coal preparation plant according to claim 2, characterized in that: the electric stirring rod (23) is provided with a stirring blade (25) in a spiral space.
5. The system of claim 4, wherein the system comprises: the pitch of stirring vane (25) is from last trend that is the taper down, the radius of stirring vane (25) is from last trend that is the taper down.
6. The system of claim 5, wherein the system comprises: the bearing chassis (27) of churn (21) is flat cylindrical structure, and flat cylindrical structure's upper surface is the non-horizontal plane, and satisfies the circular arc tangent line end that at least a pair of kept away from each other and forms the difference in height of the biggest vertical direction, and bearing chassis (27) are connected with electric puddler (23) movable through swing joint piece (28).
7. The system of claim 6, wherein the system comprises: the upper surface of the bearing chassis (27) is in an elliptical shape formed by straight line beveling.
8. The system of claim 6, wherein the system comprises: the upper surface of the bearing chassis (27) is a nonlinear surface gradient surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010702143.2A CN111822139A (en) | 2020-07-21 | 2020-07-21 | Coal washing system is gone into in coal preparation plant to cooperation of middling coal and lump coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010702143.2A CN111822139A (en) | 2020-07-21 | 2020-07-21 | Coal washing system is gone into in coal preparation plant to cooperation of middling coal and lump coal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111822139A true CN111822139A (en) | 2020-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010702143.2A Pending CN111822139A (en) | 2020-07-21 | 2020-07-21 | Coal washing system is gone into in coal preparation plant to cooperation of middling coal and lump coal |
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| Country | Link |
|---|---|
| CN (1) | CN111822139A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113304870A (en) * | 2021-07-30 | 2021-08-27 | 江苏钜熙矿用设备科技有限公司 | Centrifugal automatic concentrating machine |
-
2020
- 2020-07-21 CN CN202010702143.2A patent/CN111822139A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113304870A (en) * | 2021-07-30 | 2021-08-27 | 江苏钜熙矿用设备科技有限公司 | Centrifugal automatic concentrating machine |
| CN113304870B (en) * | 2021-07-30 | 2021-10-08 | 江苏钜熙矿用设备科技有限公司 | Centrifugal automatic concentrating machine |
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