CN104923382A - Tailing quantified and continuous discharging method for coarse slime separation machine - Google Patents
Tailing quantified and continuous discharging method for coarse slime separation machine Download PDFInfo
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- CN104923382A CN104923382A CN201510407227.2A CN201510407227A CN104923382A CN 104923382 A CN104923382 A CN 104923382A CN 201510407227 A CN201510407227 A CN 201510407227A CN 104923382 A CN104923382 A CN 104923382A
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Abstract
The invention relates to a tailing quantified and continuous discharging method for a coarse slime separation machine. Tailing quantified and continuous discharging of the coarse slime separation machine is achieved through a water-supplementing stable pressure box, an electric regulation valve, a frequency conversion discharging pump and a discharging stable flow box. The discharging method of the coarse slime separation machine is optimized, a conical or bell-shaped discharging valve of a discharging port of the coarse slime separation machine is omitted, and the discharging amount of tailings is indirectly adjusted through adjusting the flow of the discharging pump. The discharging method is particularly suitable for a high-density separation process small in discharging amount, a discharging system is not blocked, small-flow continuous discharging can be achieved, the ash content of the tailings can reach above 60% or 65%, a bed layer will not surge vertically any more, and the separation precision is improved.
Description
Technical field
This invention belongs to separation of coarse slime technical field, be specifically related to a kind of separation of coarse slime tail ore deposit quantitatively, the method for continuous pulp discharge.
Background technology
The equipment that coal preparation plant is used for fine coal generally has spiral and hindered bed separator (TCS, TBS, CSS) two kinds.Separation of coarse slime machine as herein described, refers to hindered bed separator.Its main operational principle is: separation of coarse slime machine is a kind of hindered falling formula separator utilizing the ascending current effect bottom cell body with certain pressure to carry out sorting coarse granule material.Ascending current is delivered in hindered bed separator with predetermined pressure and flow velocity, then is distributed to bottom half equably by turbulence plate, and the middle and lower part of interference bed forms the bed be made up of suspended particulate, and in this bed, particle is highly enriched, forms autogenous medium.Particle mutually disturbs in decline process, forms different density gradients in suspension, passes through to limit material.Material enters layering after hindered bed separator, and thick or heavy material concentrates on the bottom of cell body; Thin or light material then moves upward.Along with feeding of material, thin and light material by downflow weir to overflow tank; Thick or heavy material is deposited to bottom, is discharged by bottom discharging mouth.Density sensor immerses corresponding height in bed, carries out continual monitoring to the bed density in cell body.Any change of bed density all by the signal of telecommunication of a generation 4 ~ 20mA to intelligence control system, the density value of intelligence control system to the actual density monitored and setting compares, if actual density is too high, will discharge be increased, discharge high ash material unnecessary in bed.Otherwise, then the discharge of materials of bed is limited, to make to disturb bed to keep stable in cell body.
At present, the discharge mechanism of existing separation of coarse slime machine is made up of electrohydraulic cylinder, locator and taper or bell blow-off valve, taper or bell blow-off valve are placed in the valve seat bottom sorting cell body, and locator receives the current signal from 4 ~ 20mA of control system PLC.When the proportion of bed exceeds setting value, when needing valve opening discharge, executing agency just promotes taper or bell blow-off valve and lifts off a seat and discharge high ash material.
There is following problem in the method that existing separation of coarse slime machine adopts blow-off valve to carry out discharge.
(1) in producing, existing discharging method is difficult to control low discharge discharge, because of generally cannot normal discharge when valve opening is less, even can block discharge gate.
(2)existing discharging method is that interruption opens or closes blow-off valve, and this method causes bed unstable, the upper and lower panting of bed, and cleaned coal and the fluctuation of tail coal ash content comparatively greatly, cause tailings ash content lower, are generally 40% ~ 60%.
Summary of the invention
This invention provide a kind of separation of coarse slime tail ore deposit quantitatively, the method for continuous pulp discharge, it is realized by moisturizing pressurizer tank, electric control valve, frequency conversion discharge pump, discharge current stabilization case.Described method eliminates coal slurry separator taper or bell blow-off valve, achieves blowdown pressure, flow continous-stable by moisturizing pressurizer tank, discharge current stabilization case; Regulated the flow of discharge pump by frequency conversion discharge pump, electric control valve simultaneously, thus Indirect method mine tailing withdrawal rate, the method achieve mine tailing discharge quantitatively adjustable from minus flow ~ zero delivery ~ positive flow.
The technical scheme that this invention adopts is as follows.
This is invented, and the mine tailing providing a kind of separation of coarse slime machine is quantitative, the method for continuous pulp discharge, and scheme comprises moisturizing pressurizer tank, electric control valve, discharge blending bin, frequency conversion discharge pump, discharge current stabilization case.Moisturizing pressurizer tank is provided with downflow weir, and downflow weir is higher than the most high liquid level (HLL) of separation of coarse slime machine, and moisturizing pressurizer tank is connected with discharge blending bin, discharge pump entrance by pipeline, and electric control valve installed by moisturizing pipeline.The program eliminates taper or the bell blow-off valve of separation of coarse slime machine discharge gate, separation of coarse slime machine discharge gate is adopted to be connected with discharge pump inlet duct by discharge blending bin, pipeline, discharge pump outlet flows automatically after being connected with discharge current stabilization case and discharges, and the import of discharge current stabilization case is higher than the most high liquid level (HLL) of separation of coarse slime machine.
The present invention is provided with the moisturizing pressurizer tank higher than the most high liquid level (HLL) of separation of coarse slime machine, and moisturizing pressurizer tank adopts the mode of continuous overflow, the geometry discrepancy in elevation H of its overflow liquid level and discharge pump feeding pipe
2keep constant.Separation of coarse slime machine itself is the geometry discrepancy in elevation H of a stable liquid level, its downflow weir and discharge pump feeding pipe equally
1constant.According to discharge pump pan feeding pipeline pressure equal principle, derive following two relational expressions.
Relational expression one: Q
1=(-R
2q-(R
2 2q
2+ (R
2q
2+ ρ
1gH
1-ρ
2gH
2) (R
1-R
2))
1/2)/(R
1-R
2).
Relational expression two: Q
2=(R
1q+ (R
2 2q
2+ (R
2q
2+ ρ
1gH
1-ρ
2gH
2) (R
1-R
2))
1/2)/(R
1-R
2).
In formula: Q--discharge pump flow, unit m
3/ h.
Q
1-separation of coarse slime tail ore deposit discharge flow, unit m
3/ h.
Q
2-moisturizing pressurizer tank outlet stream amount, unit m
3/ h.
R
1-separation of coarse slime machine discharge gate resistance coefficient.
R
2-moisturizing pressurizer tank outlet system resistance coefficient.
ρ
1pulp density in-separation of coarse slime machine, units/kg/m
3.
ρ
2-moisturizing density, units/kg/m
3.
H
1-moisturizing downflow weir and the discharge pump feeding pipe discrepancy in elevation, unit m.
H
2-separator downflow weir and the discharge pump feeding pipe discrepancy in elevation, unit m.
By relational expression one, two, draw flow control relationship curve: Q
1-Q curve, Q
2-Q curve, Q
1/ Q
2-Q curve, refers to Fig. 2.
Can draw from upper curve, by adjusting the flow Q of discharge pump, can continous-stable adjustment mine tailing Q
1flow, make Q
1quantitatively adjustable from minus flow ~ zero delivery ~ positive flow.In addition, as can be seen from two relational expressions, mine tailing discharge flow Q
1except being subject to the impact of variable Q, its stability is also by following parameter influence.
(1) discharge gate and water charging system resistance coefficient R
1, R
2: this system is for there being pressing system, so after electric control valve setting, these two parameters are steady state value.
(2) pulp density ρ in separation of coarse slime machine
1, moisturizing density p
2: under the adjustment of density intelligence control system, density p in separation of coarse slime machine
1relative constancy, moisturizing density p
2for steady state value.
(3) moisturizing height H
1, separator liquid level H
2: because moisturizing pressurizer tank is provided with downflow weir, separation of coarse slime machine is also a pressurizer tank, so H
1, H
2two parameter values are constant.
Owing to affecting mine tailing discharge flow Q
1whole parameters be steady state value, so mine tailing blowdown pressure, flow continous-stable.
Discharge pump of the present invention is provided with variable-frequency governor, and according to pump similarity principle, the discharge flow of discharge pump is directly proportional to revolution, so change the flow Q of discharge pump by the revolution Absorbable organic halogens changing frequency conversion discharge pump.
The present invention arranges the drainage conduit of upwards carrying in discharge pump outlet, discharge current stabilization case is provided with at drainage conduit peak (higher than the most high liquid level (HLL) of separation of coarse slime machine), mine tailing tangent line feeds in the middle part of discharge current stabilization case by discharge pump, current stabilization upper box part has blow vent, pressurizer tank bottom connects gravity flow drainage conduit, the method makes discharge pump have pressure material and mine tailing to flow automatically outer drainedly entirely to separate, and makes discharge pump stability of flow.
This invention arranges moisturizing pressurizer tank, electric control valve, frequency conversion discharge pump, discharge current stabilization case, by regulating the flow of discharge pump during production, thus the method for Indirect method mine tailing withdrawal rate, make the mine tailing of separation of coarse slime machine quantitatively, continuous blow-down.System produce and normal supplied materials time, densitometer checks the density in bed, and when bed density raises, intelligence control system carrys out enlargement discharge Q by the revolution strengthening discharge pump, thus increasing mine tailing Q
1flow, high density mine tailing discharge strengthen after, make bed stablize; Otherwise when bed density reduces, intelligence control system reduces flow Q by the revolution reducing discharge pump, thus reduces mine tailing Q
1flow, after highdensity mine tailing discharge reduces, bed is stablized; As production system come doses reduce or supplied materials spoil content is lower time, intelligence control system reduces flow Q by reducing the revolution of discharge pump, thus makes mine tailing Q
1flow be adjusted to very little or be adjusted to zero delivery, owing to eliminating taper or the bell blow-off valve of separation of coarse slime machine discharge gate, discharge system is by flow-control withdrawal rate, and discharge system can not block.This method achieves stable, continuous pulp discharge, bed panting no longer up and down, and sharpness of separation is improved, and can obtain higher tailings ash content (more than 60% or 65%) simultaneously.
Preferably, moisturizing pressurizer tank, height of weir plate is adjustable, enters water place arrange drip tray at pressurizer tank, prevents into the impact of water to voltage stabilizing moisturizing, to ensure that refill flow is stablized.
Preferably, discharge pump, is provided with frequency converter, changes pump revolution, thus continuously change the flow of discharge pump by the frequency changing frequency converter.
Preferably, moisturizing pressurizer tank arranges electric control valve to discharge pump moisturizing pipeline, can the resistance coefficient R of on-line control moisturizing pipeline by electric control valve
2, thus regulate drainage conduit flow Q
1.
Preferably, discharge current stabilization case, discharge current stabilization case is cylindrical shape, and from middle part tangent line pan feeding, gas port is opened at top, and bottom connects gravity flow drainage conduit, and the method makes discharge pump discharge and gravity flow is outer drainedly entirely separates, and makes discharge pump stability of flow.
The present invention brings following beneficial effect:
Present invention optimizes the discharging method of separation of coarse slime machine, cancel taper or the bell blow-off valve of separation of coarse slime machine discharge gate, by the method regulating discharge pump flow to carry out Indirect method mine tailing withdrawal rate, this discharging method can realize separation of coarse slime machine quantitatively, continuously, stablize discharge, the method is especially applicable to the less high density assorting room of withdrawal rate, discharge system does not block, can low discharge continuous pulp discharge, tailings ash content can reach more than 60% or 65%, bed panting no longer up and down, sharpness of separation is improved.In addition, because system is run thick, generally have a certain amount of comparatively coarse granule in coarse slime, original TBS especially easily blocks, and need often stop production blowing, and TCS solves this problem.
In the separation of coarse slime link of China's Coal Preparation Plant, major part adopts spiral or hindered bed separator as separation of coarse slime equipment, its tailings ash content of discharging is about 40% ~ 60%, and the tail coal that this mine tailing caloric value is generally 1500 ~ 2500kcal/kg(general more than 2000kcal/kg on request does not allow outer row).As adopted separation of coarse slime machine discharging method of the present invention, tailings ash content can be brought up to more than 60%, produce mine tailing per year and be reduced to about 150,000 tons, caloric value can be down to below 1500kcal/kg, and this part mine tailing can directly be discarded.
Accompanying drawing explanation
Fig. 1 invents the scheme schematic diagram provided.
Fig. 2 and Fig. 3 flow control relationship curve (Q
1-Q curve, Q
2-Q curve, Q
1/ Q
2-Q curve).
In figure: 1-separation of coarse slime machine drum body 2-moisturizing pressurizer tank 3-discharge blending bin 4-discharge pump 5-discharge blending bin 6-refill flow meter 7-electric control valve 8-discharge flow meter 9-Q
1-Q curve 10-Q
2-Q curve 11-Q
1/ Q
2-Q curve.
Detailed description of the invention
For the scheme shown in Fig. 1, inventor has made a model machine 6 ~ July in 2015, and has carried out type approval test at Shanxi valley coal mine separation factory owner car wash.Test proves that the method for Indirect method mine tailing withdrawal rate is feasible by regulating the flow of discharge pump, the method achieve mine tailing discharge from minus flow ~ zero delivery ~ positive flow quantitatively, stablize adjustable, obtain the tailings ash content of more than 60% or 65% simultaneously.Flow control relationship refers to following table---valley TCS experimental prototype flow control relationship table.
| Discharge pump frequency (Hz) | Water compensating valve aperture (%) | Discharge pump flow Q(m 3/h） | Mine tailing discharge flow Q 1（m 3/h） | Refill flow Q 2（m 3/h） |
| 15 | 85 | 47 | 0 | 47 |
| 15 | 83 | 49 | 4 | 45 |
| 16 | 100 | 41 | 12 | 29 |
| 17 | 100 | 46 | 13 | 33 |
| 16 | 85 | 38 | 10 | 28 |
| 16 | 100 | 40 | 11 | 29 |
| 16 | 70 | 36 | 8 | 28 |
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also change technique scheme and revise.But the present invention is not limited to above-mentioned concrete technical scheme, any apparent improvement of every those skilled in the art done by basis of the present invention, replacement or modification all belong to protection scope of the present invention.In addition, although employ some specific terms in this description, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (7)
1. separation of coarse slime tail ore deposit quantitatively, the method for continuous pulp discharge, it is characterized in that by moisturizing pressurizer tank, electric control valve, frequency conversion discharge pump and discharge current stabilization case realize separation of coarse slime tail ore deposit quantitatively, continuous pulp discharge; Described method eliminates coal slurry separator taper or bell blow-off valve, realizes blowdown pressure, flow continous-stable by moisturizing pressurizer tank, discharge current stabilization case; Described method regulates the flow of discharge pump by frequency conversion discharge pump, electric control valve, thus Indirect method mine tailing withdrawal rate, it is quantitatively adjustable from minus flow ~ zero delivery ~ positive flow that described method achieves separation of coarse slime tail ore deposit discharge.
2. separation of coarse slime tail ore deposit according to claim 1 quantitatively, the method for continuous pulp discharge, it is characterized in that: moisturizing pressurizer tank is provided with downflow weir, downflow weir is higher than the most high liquid level (HLL) of separation of coarse slime machine, moisturizing pressurizer tank is connected with the discharge blending bin of discharge pump entrance by pipeline, and electric control valve installed by moisturizing pipeline; Separation of coarse slime machine discharge gate and discharge pump inlet duct are connected to discharge blending bin; Discharge pump outlet is connected with discharge current stabilization case, and connect the mouth of pipe higher than the most high liquid level (HLL) of separation of coarse slime machine, discharge current stabilization upper box part has blow vent, and discharge current stabilization lower box part connects gravity flow drainage conduit.
3. separation of coarse slime tail ore deposit according to claim 1 quantitatively, the method for continuous pulp discharge, it is characterized in that: the method is especially applicable to the less high density assorting room of withdrawal rate, discharge system does not block, can low discharge continuous pulp discharge, tailings ash content can reach more than 60% or 65%, bed panting no longer up and down, sharpness of separation is improved.
4. separation of coarse slime tail ore deposit according to claim 1 quantitatively, the method for continuous pulp discharge, it is characterized in that: moisturizing pressurizer tank height of weir plate is adjustable, drip tray is set in water inlet place of moisturizing pressurizer tank, prevents into the impact of water to moisturizing pressurizer tank liquid level, to ensure that refill flow is stablized.
5. separation of coarse slime tail ore deposit according to claim 1 quantitatively, the method for continuous pulp discharge, it is characterized in that: discharge pump is provided with frequency converter, change pump revolution by the frequency changing frequency converter, thus continuously change the flow of discharge pump.
6. separation of coarse slime tail ore deposit according to claim 1 quantitatively, the method for continuous pulp discharge, it is characterized in that: moisturizing pressurizer tank arranges electric control valve to discharge pump moisturizing pipeline, can the aperture of on-line control moisturizing pipeline by electric control valve, thus regulate drainage conduit flow.
7. separation of coarse slime tail ore deposit according to claim 1 quantitatively, the method for continuous pulp discharge, it is characterized in that: discharge current stabilization case is cylindrical shape, from middle part tangent line pan feeding, gas port is opened at top, bottom connects gravity flow drainage conduit, the method makes discharge pump discharge and gravity flow is outer drainedly entirely separates, and makes discharge pump stability of flow.
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|---|---|---|---|
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105435951A (en) * | 2015-12-22 | 2016-03-30 | 大同煤矿集团有限责任公司 | Coarse slime separation machine |
| CN107876207A (en) * | 2017-10-30 | 2018-04-06 | 天津美腾科技有限公司 | A kind of separation of coarse slime tail ore deposit quantifies and the system and method for continuous pulp discharge |
| CN107875690A (en) * | 2017-12-13 | 2018-04-06 | 安徽华骐环保科技股份有限公司 | A kind of microkinetic air lift row's scum silica frost device and its processing method |
| CN108057512A (en) * | 2017-12-18 | 2018-05-22 | 中国矿业大学 | A kind of separation of coarse slime machine weight product continuous-stable discharge device and method |
| CN111450984A (en) * | 2020-04-16 | 2020-07-28 | 谢艳梅 | Underflow continuous quantitative discharge three-product interference bed separator |
| CN113751191A (en) * | 2021-10-09 | 2021-12-07 | 泰德(天津)工业技术有限公司 | Accurate quantitative continuous coal slime sorter tailings discharging mechanism |
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| CN113751191A (en) * | 2021-10-09 | 2021-12-07 | 泰德(天津)工业技术有限公司 | Accurate quantitative continuous coal slime sorter tailings discharging mechanism |
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Application publication date: 20150923 |