CN104162479A - Movable sieve waste rock discharge system slime water treatment process and device - Google Patents
Movable sieve waste rock discharge system slime water treatment process and device Download PDFInfo
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- CN104162479A CN104162479A CN201410260071.5A CN201410260071A CN104162479A CN 104162479 A CN104162479 A CN 104162479A CN 201410260071 A CN201410260071 A CN 201410260071A CN 104162479 A CN104162479 A CN 104162479A
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Abstract
The invention relates to a movable sieve waste rock discharge system slime water treatment process and device. Slime water enters a concentrated water tank, coarse particles are recycled through a dredging sump bucket elevator, overflowing water of the concentrated water tank is driven into an inclined board precipitator to be precipitated in advance, underflow of the inclined board precipitator is driven into a concentration grading swirler, underflow of the concentration grading swirler is dehydrated through a sieve bend and a high-frequency sieve, and then coarse slime is recycled; overflowing water of the concentration grading swirler, backwater of the sieve bend and backwater of the high-frequency sieve enter a concentrator, a flocculating agent is added to the concentrator, and the slime water in the concentrator is clarified; underflow of the concentrator enters a filter press, and then fine slime is recycled; overflowing water of the inclined board precipitator, overflowing water of the concentrator and filter liquor of the filter press serve as circulating washing water to enter a movable sieve jig. The movable sieve waste rock discharge system slime water treatment process and device have the advantages that water resources are saved, and the environment is protected; the clean circulating washing water is obtained, and the good production condition is created for separation of the movable sieve jig; coal resources are saved, and economic benefits are increased; labor intensity of workers is relieved.
Description
(1) technical field
The invention belongs to black water processing technology field, particularly a kind of moving sieve waste stone exhaust system black water treatment process and treating apparatus.
(2) background technology
Movable-sieve jig is coal preparation plant's lump coal gangue equipments, and general size range of separation is 300-50(35) mm.In actual production, show, the degree of perfection of slime water system affects the normal operation of moving screen system, does not especially have the moving sieve waste stone exhaust system of coal preparation plant.
Structure and the operation principle of movable-sieve jig are different from air pulsating jig, black water in movable-sieve jig body seals, therefore the secondary slime producing in the coal slime that pan feeding is brought into and assorting room and the coal slime of drifting along can be cumulative in body, in the time having influence on the separating effect of movable-sieve jig, just the water in body all need to be emitted, again add recirculated water.According to knowhow, the black water in movable-sieve jig just needs discharge once in every 3～5 days.
In the time that some fault appears in movable-sieve jig, the black water in movable-sieve jig and bucket elevator all need to be emitted, to equipment is overhauled.Due to production management, also there is run, drip, leak black water in addition, in black water, contain raw coal and the coal slime of some.
For moving sieve waste stone exhaust system black water, technique adopts mostly concentrates pond to collect, reclaim coarse slime by concentrated classifying cyclone, sieve bend, high frequency shale shaker, but because moving screen system black water concentration is rare, coarse slime recovering effect is bad, concentrate pond bulky grain often to need labor cleaning, increase labor strength.Sieve bend, the lower black water of high-frequency screen sieve return to moving sieve washing system in addition, cause thin mud to gather circulation.
If the black water of discharge is dealt with improperly, movable-sieve jig coal slime is gathered, vicious circle, affects movable-sieve jig separating effect, normal production and the operation of the moving sieve of serious restriction waste stone exhaust system.Outer row's black water, causes contaminated environment at a puss, and waste water resource, increases production cost.
(3) summary of the invention
The present invention is in order to make up the deficiencies in the prior art, provide a kind of point of grade to black water process recovery, Separation of Solid and Liquid thoroughly, slime water system benign cycle, ensure moving sieve waste stone exhaust system black water treatment process and the treating apparatus of movable-sieve jig washing effect.
The present invention is achieved through the following technical solutions:
A kind of moving sieve waste stone exhaust system black water treatment process, is characterized in that: comprise the following steps:
(1), the coarse granule of black water is reclaimed, after black water overflow, carry out preformed precipitate;
(2), that preformed precipitate underflow carries out classification is concentrated, the concentrated underflow of classification reclaims coarse slime after dehydration;
(3), the concentrated overflow of classification and the water that removes concentrates, and adds flocculant in it, black water is clarified;
(4), concentrated underflow carries out press filtration recovery fine coal slurry;
(5), preformed precipitate overflow, concentrated overflow and press filtration filtrate centralized recovery are sent into movable-sieve jig as circulation wash water.
Preferably, in step (1), the granularity of overflow is controlled at below 0.75mm.
Preferably, in step (2), partition size is 0.25～0.35mm.
Preferably, in step (3), flocculant is selected polyacrylamide, every m
3in black water, add 1～5g.
Preferably, in step (3), be concentrated into 300～400g/l.
Preferably, in step (4), the granularity of the fine coal slurry of recovery is less than 0.25mm, and filter cake moisture is 25 ﹪～28 ﹪.
A kind of moving sieve waste stone exhaust system black water treating apparatus, comprise concentrated pond, concentrated pond is connected with concentrated classifying cyclone, sieve bend and high-frequency screen successively, it is characterized in that: in described concentrated pond, be provided with and drag for hole bucket elevator, concentrate between pond and concentrated classifying cyclone and be provided with hang plate settling vessel, concentrated classifying cyclone, sieve bend are connected with thickener with high-frequency screen, and thickener bottom is connected with filter press.
Between described concentrated pond and hang plate settling vessel, be provided with coal slime water pump, between hang plate settling vessel and concentrated classifying cyclone, be provided with concentrated classifying cyclone pan feeding pump, between thickener and filter press, be provided with underflow pump.
The invention has the beneficial effects as follows: realized in moving sieve waste stone exhaust system coal slime water factory and processed and reclaim, closed water circuit, has saved water resource, has protected environment; In the process of moving screened coal, obtain peace and quiet circulation wash water, for good working condition has been created in movable-sieve jig sorting; Coarse granule, coarse slime, fine coal slurry divide grade to reclaim, and are mixed mixed coal, have saved coal resources, have improved economic benefit; Black water is processed and is all adopted plant equipment to reclaim, and has reduced labor strength.
(4) brief description of the drawings
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Accompanying drawing 1 is process chart of the present invention;
In figure, 1 concentrates pond, 2 concentrated classifying cyclones, and 3 sieve bends, 4 high-frequency screens, 5 drag for hole bucket elevator, 6 hang plate settling vessels, 7 thickeners, 8 filter presses, 9 coal slime water pumps, 10 concentrated classifying cyclone pan feeding pumps, 11 underflow pumps.
(5) detailed description of the invention
Accompanying drawing is a kind of specific embodiment of the present invention.Moving sieve waste stone exhaust system black water, comprise regularly discharge water, accident discharges water and run, drip, leak black water, it enters concentrates pond 1, reclaims coarse granule in black water by dragging for hole bucket elevator 5, coarse granule mixes mixed coal product.Concentrate the overflow in pond 1 to squeeze into 6 preformed precipitate of hang plate settling vessel through coal slime water pump 9, hang plate settling vessel 6 underflows are squeezed into concentrated classifying cyclone 2 by concentrated classifying cyclone pan feeding pump 10, and to carry out classification concentrated, concentrated classifying cyclone 2 underflows reclaim coarse slime after sieve bend 3, high-frequency screen 4 dehydrations, and coarse slime mixes mixed coal product.Concentrated classifying cyclone 2 overflows, sieve bend 3 backwaters, high-frequency screen 4 backwaters enter in thickener 7, and toward the interior interpolation flocculant of thickener 7, flocculant is selected polyacrylamide, and general consumption is 1～5g/m
3(black water), by the black water clarification in thickener 7.Thickener 7 underflows enter filter press 8 through underflow pump 11 and reclaim fine coal slurry, mix mixed coal product.6 overflows of hang plate settling vessel, thickener 7 overflows, filter press 8 filtrates enter movable-sieve jig as circulation wash water.
Adopt one of the present invention moving sieve waste stone exhaust system black water treatment process and treating apparatus, drag for hole bucket elevator 5 as hydraulic classification equipment, should have enough desilting areas and reasonable enter material way, mainly reclaim coarse granule coal, overflow granularity is controlled at below 0.75mm in addition.Hang plate settling vessel 6 carries out preformed precipitate to black water, meets the pan feeding concentration requirement of concentrated classifying cyclone 2, and occupation of land less, effectively desilting area is large, deposition efficiency is high, realize the discharge of underflow continous-stable.Concentrated classifying cyclone 2 is by black water grading, and partition size is generally 0.25-0.35mm; Underflow density is adjusted to OK range, for coarse slime dehydration reclaimer (high-frequency screen) is created process conditions.Thickener 7 both can be dark tapered thickener, can be also peripheral-traction, center driving or heavy duty detergent thickener, by the clarification of the black water degree of depth, obtained peace and quiet overflow water, as the wash water of movable-sieve jig, realized clear water coal separation; Underflow sedimentation concentration is to OK range (300-400g/l), to meet the requirement of filter press 8 to its pan feeding concentration.<0.25mm fine coal slurry is reclaimed in filter press 8 dehydrations, and filter cake moisture (25-28% left and right) can ensure to mix mixed coal and sell; Filtrate cleaning, stops the thin mud of high ash and circulates with it.
Claims (8)
1. a moving sieve waste stone exhaust system black water treatment process, is characterized in that: comprise the following steps:
(1), the coarse granule of black water is reclaimed, after black water overflow, carry out preformed precipitate;
(2), that preformed precipitate underflow carries out classification is concentrated, the concentrated underflow of classification reclaims coarse slime after dehydration;
(3), the concentrated overflow of classification and the water that removes concentrates, and adds flocculant in it, black water is clarified;
(4), concentrated underflow carries out press filtration recovery fine coal slurry;
(5), preformed precipitate overflow, concentrated overflow and press filtration filtrate centralized recovery are sent into movable-sieve jig as circulation wash water.
2. the moving sieve of one according to claim 1 waste stone exhaust system black water treatment process, is characterized in that: in step (1), the granularity of overflow is controlled at below 0.75mm.
3. the moving sieve of one according to claim 1 waste stone exhaust system black water treatment process, is characterized in that: in step (2), partition size is 0.25～0.35mm.
4. the moving sieve of one according to claim 1 waste stone exhaust system black water treatment process, is characterized in that: in step (3), flocculant is selected polyacrylamide, every m
3in black water, add 1～5g.
5. the moving sieve of one according to claim 1 waste stone exhaust system black water treatment process, is characterized in that: in step (3), be concentrated into 300～400g/l.
6. the moving sieve of one according to claim 1 waste stone exhaust system black water treatment process, is characterized in that: in step (4), the granularity of the fine coal slurry of recovery is less than 0.25mm, and filter cake moisture is 25 ﹪～28 ﹪.
7. a moving sieve waste stone exhaust system black water treating apparatus, comprise concentrated pond (1), concentrate pond (1) to be connected with concentrated classifying cyclone (2), sieve bend (3) and high-frequency screen (4) successively, it is characterized in that: in described concentrated pond (1), be provided with and drag for hole bucket elevator (5), concentrate between pond (1) and concentrated classifying cyclone (2) and be provided with hang plate settling vessel (6), concentrated classifying cyclone (2), sieve bend (3) are connected with thickener (7) with high-frequency screen (4), and thickener (7) bottom is connected with filter press (8).
8. the moving sieve of one according to claim 7 waste stone exhaust system black water treating apparatus, it is characterized in that: between described concentrated pond (1) and hang plate settling vessel (6), be provided with coal slime water pump (9), between hang plate settling vessel (6) and concentrated classifying cyclone (2), be provided with concentrated classifying cyclone pan feeding pump (10), between thickener (7) and filter press (8), be provided with underflow pump (11).
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Cited By (8)
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| CN104437837A (en) * | 2014-12-24 | 2015-03-25 | 山西焦煤集团投资有限公司 | Technology of refuse discharging with vibrating screen |
| CN104841631A (en) * | 2015-05-07 | 2015-08-19 | 山东华联矿业股份有限公司 | Cyclone curved screen and application method thereof |
| CN105127010A (en) * | 2015-09-30 | 2015-12-09 | 河南东大矿业股份有限公司 | Charging combination device of monohydrallite direct flotation tallings filter press |
| CN110540045A (en) * | 2019-09-24 | 2019-12-06 | 中煤天津设计工程有限责任公司 | Coal scatter cleaning system at the bottom of inclined shaft (lane) of belt conveyor |
| CN111185299A (en) * | 2020-03-09 | 2020-05-22 | 四川绿矿环保科技有限公司 | Production process method for recycling coal gangue |
| CN112156885A (en) * | 2020-08-17 | 2021-01-01 | 中国矿业大学 | Process for recycling coarse slime in qualified medium |
| CN112794589A (en) * | 2020-12-30 | 2021-05-14 | 韩臻 | Efficient coal slime dissolved gas dehydration process |
| CN115403180A (en) * | 2022-08-18 | 2022-11-29 | 天津天元新材料科技有限公司 | Slime water treatment process capable of recovering floatable coarse coal particles |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104437837A (en) * | 2014-12-24 | 2015-03-25 | 山西焦煤集团投资有限公司 | Technology of refuse discharging with vibrating screen |
| CN104841631A (en) * | 2015-05-07 | 2015-08-19 | 山东华联矿业股份有限公司 | Cyclone curved screen and application method thereof |
| CN105127010A (en) * | 2015-09-30 | 2015-12-09 | 河南东大矿业股份有限公司 | Charging combination device of monohydrallite direct flotation tallings filter press |
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| CN110540045A (en) * | 2019-09-24 | 2019-12-06 | 中煤天津设计工程有限责任公司 | Coal scatter cleaning system at the bottom of inclined shaft (lane) of belt conveyor |
| CN111185299A (en) * | 2020-03-09 | 2020-05-22 | 四川绿矿环保科技有限公司 | Production process method for recycling coal gangue |
| CN111185299B (en) * | 2020-03-09 | 2022-08-05 | 四川绿矿环保科技有限公司 | Production process method for recycling coal gangue |
| CN112156885A (en) * | 2020-08-17 | 2021-01-01 | 中国矿业大学 | Process for recycling coarse slime in qualified medium |
| CN112794589A (en) * | 2020-12-30 | 2021-05-14 | 韩臻 | Efficient coal slime dissolved gas dehydration process |
| CN115403180A (en) * | 2022-08-18 | 2022-11-29 | 天津天元新材料科技有限公司 | Slime water treatment process capable of recovering floatable coarse coal particles |
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