CN104307623A - System and method for adjusting horizontal flow in heavy-medium shallow tank - Google Patents
System and method for adjusting horizontal flow in heavy-medium shallow tank Download PDFInfo
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- CN104307623A CN104307623A CN201410575322.9A CN201410575322A CN104307623A CN 104307623 A CN104307623 A CN 104307623A CN 201410575322 A CN201410575322 A CN 201410575322A CN 104307623 A CN104307623 A CN 104307623A
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Abstract
The invention discloses a system and a method for adjusting horizontal flow in a heavy-medium shallow tank. The system comprises a heavy-medium shallow tank, a heavy-medium pump and a sculping screen; the top of the heavy-medium shallow tank is provided with a feed opening; the bottom of the heavy-medium shallow tank is provided with a residue discharge opening; the heavy-medium shallow tank is further provided with a first liquid inlet admitting inflowing of horizontal flow medium and a second liquid inlet admitting inflowing of upward flow medium; the heavy-medium pump is communicated with the first liquid inlet through a first pipeline and is communicated with the second liquid inlet through a second pipeline; a third pipeline is disposed between the first pipeline and the sculping screen; a flow control valve is disposed on the third pipeline. The system and the method have the advantages that the volume of the horizontal flow in the heavy-medium shallow tank can be controlled without adjusting the flow for the heavy-medium pump, damage of the heavy-medium pump is avoided accordingly, sculping incompleteness caused by excess flowing speed of the horizontal flow is decreased, and medium consumption increase can be eliminated.
Description
Technical field
The present invention relates to a kind of regulating system and control method, particularly relating to a kind of for regulating the system and method for dense-medium shallow-tank horizontal flow.
Background technology
Coal preparation can fundamentally improve and improve Coal Quality, reduces the pollution that coal burning brings.In prior art, coal preparation mainly comprises jigging, sink float, flotation, all multimodes such as dry separation, advantages such as wherein, dense-medium separation is high with its efficiency of separation, separating density adjustable range is wide, strong adaptability, sorting particle size range are wide and being widely applied.
Dense-medium separation utilizes dense-medium shallow-tank to carry out sorting to coal, wherein, the light product being less than separating medium density can swim in top, and flow through downflow weir become head coal product with the separating medium of flowing, and the material being greater than Media density can sink to the bottom of dense-medium shallow-tank, transport dense-medium shallow-tank by the scraper plate of low-speed motion.The separating medium of dense-medium shallow-tank comprises horizontal flow and upwelling, and wherein, upwelling can suppress the sedimentation of particle, makes suspension more stable, and horizontal flow constantly supplements separating medium, thus ensure that the stability of density of suspending liquid.In addition, horizontal flow also plays the effect driving cleaned coal flowing, thus the cleaned coal floated is discharged by downflow weir.
In order to ensure that cleaned coal is discharged in time, usually the flow increasing horizontal flow is needed, but in actual production, because dense-medium shallow-tank horizontal flow flow is excessive, separating medium amount greatly very easily causes sculping screen to alter Jie, Jie is made to consume increase, increase production cost, affect the every balance and stability of production system, and reduce separating effect.Driving the flow velocity of cleaned coal for reducing horizontal flow, avoiding separating medium amount excessive and many negative effects of bringing, usually needing to regulate the squeezing valve of horizontal flow with the size of level of control stream.But, if larger wearing and tearing will be produced to squeezing valve by regulating squeezing valve to control flow for a long time, add the high density of dense medium separation, this wearing and tearing are just more serious, adding manpower and materials and material cost, even affecting service life and the operating condition of dense medium pump because suppressing pump for a long time.
Summary of the invention
For prior art Problems existing, object of the present invention provides that a kind of it can ensure separating effect for regulating the system and method for dense-medium shallow-tank horizontal flow, reduces the damage caused dense medium pump, reduces the loss of separating medium.
Object of the present invention is achieved through the following technical solutions:
For regulating a system for dense-medium shallow-tank horizontal flow, the sculping screen comprising dense-medium shallow-tank, dense medium pump and be arranged between described dense-medium shallow-tank and described dense medium pump, wherein,
The top of described dense-medium shallow-tank is provided with feeding mouth, and the bottom of described dense-medium shallow-tank is provided with slag-drip opening, described dense-medium shallow-tank is also provided with for the first inlet of input level flow medium and the second inlet for inputting upwelling medium;
Described dense medium pump is communicated with described first inlet by the first pipeline, described dense medium pump is communicated with described second inlet by the second pipeline, be provided with the 3rd pipeline between described first pipeline and described sculping screen, described 3rd pipeline be provided with the valve controlling flow.
Further, the medium bucket for storing separating medium is provided with between described sculping screen and described dense medium pump.
Further, density monitoring device is provided with in described medium bucket.
Further, described density monitoring device is density sensor.
Further, described valve is squeezing valve.
Present invention also offers a kind of for regulating the method for dense-medium shallow-tank horizontal flow, comprising the steps:
Step is 1.: start dense medium pump, in dense-medium shallow-tank, horizontal flow medium is pumped into by the first pipeline, in dense-medium shallow-tank, pump into upwelling medium by the second pipeline, described upwelling medium and described horizontal flow medium form separating medium gravitational field in described dense-medium shallow-tank;
Step is 2.: the valve opening the 3rd pipeline be arranged between sculping screen and the first pipeline, pumps in described sculping screen by the upwelling medium in described first pipeline;
Step is 3.: the flow if desired increasing horizontal flow medium in described first pipeline, the flow of medium in described 3rd pipeline is then reduced by valve, otherwise, if desired reduce the flow of horizontal flow medium in described first pipeline, then increased the flow of medium in described 3rd pipeline by valve;
Step is 4.: described dense-medium shallow-tank relies on separating medium gravitational field to carry out sorting to material, and after sorting material, described separating medium flows in described sculping screen and reclaims;
Step is 5.: the separating medium of recovery repeat step 1.-step 4., reuse.
Further, the medium bucket for storing separating medium is provided with between described sculping screen and described dense medium pump.
Further, density monitoring device is provided with in described medium bucket.
Further, described density monitoring device is density sensor.
Further, described valve is squeezing valve.
Flow for regulating the system and method for dense-medium shallow-tank horizontal flow not need to regulate dense medium pump provided by the invention, just can control the size of dense-medium shallow-tank horizontal flow, thus the damage avoided dense medium pump, decrease too fast due to horizontal flow velocity of medium and de-mediated that is that cause is incomplete, contribute to eliminating the problem being situated between and consuming and increase.
Accompanying drawing explanation
Fig. 1 is that the present invention is a kind of preferred for regulating the schematic diagram of the system of dense-medium shallow-tank horizontal flow;
Fig. 2 is that the present invention is a kind of preferred for regulating the schematic diagram of the method for dense-medium shallow-tank horizontal flow.
Detailed description of the invention
Below in conjunction with accompanying drawing, a preferred embodiment of the present invention is described in detail.The identical Reference numeral of wherein identical parts represents.It should be noted that, the word "front", "rear" of use is described below, "left", "right", "up" and "down" refer to direction in accompanying drawing, word " interior " and " outward " refer to the direction towards or away from particular elements geometric center respectively.
As shown in Figure 1, the system for regulating dense-medium shallow-tank horizontal flow provided of the present invention, the sculping screen 3 comprising dense-medium shallow-tank 1, dense medium pump 2 and be arranged between described dense-medium shallow-tank 1 and described dense medium pump 2.What those skilled in the art should understand that is, described dense-medium shallow-tank 1 utilizes separating medium that coal is divided into light product and heavy product two kinds of products according to the difference of density, described dense medium pump 2 carries qualified separating medium suspension for described dense-medium shallow-tank 1, and described sculping screen 3 is with medium in order to product after removing dense medium sorting.
The top of dense-medium shallow-tank 1 of the present invention is provided with feeding mouth, the bottom of described dense-medium shallow-tank 1 is provided with slag-drip opening, described dense-medium shallow-tank 1 is also provided with for the first inlet of input level flow medium and the second inlet for inputting upwelling medium, described horizontal flow medium can ensure the stability of separating medium density, carry cleaned coal simultaneously and discharge dense-medium shallow-tank 1, described upwelling medium helps avoid described separating medium suspension and produces precipitation, thus improve stability and the homogeneity of separating medium suspension, avoid the filter medium clogging pipeline in suspension.
Dense-medium shallow-tank 1 of the present invention preferably includes cell body, discharge refuse scraper plate and drive unit thereof, during use, first in described dense-medium shallow-tank, the coal treating sorting is added by feeding mouth, carry out sorting to coal in the gravitational field that described dense-medium shallow-tank 1 is formed at separating medium suspension according to Archimedes principle, the light product being less than separating medium density of suspending liquid can swim in top and flow through downflow weir with the separating medium suspension of flowing becomes head coal product; The material being greater than separating medium density of suspending liquid can sink to the bottom of dense-medium shallow-tank 1, discharges described dense-medium shallow-tank 1 by the discharge refuse scraper plate of low-speed motion by slag-drip opening.
Dense medium pump 2 of the present invention is communicated with described first inlet by the first pipeline 4, described dense medium pump 2 is communicated with described second inlet by the second pipeline 5, the 3rd pipeline 6 is provided with between described first pipeline 4 and described sculping screen 3, described 3rd pipeline 6 is provided with the valve 7 controlling flow, described valve 7 is preferably squeezing valve.Qualified separating medium suspension pumps in described dense-medium shallow-tank 1 by described first pipeline 4 with the form of horizontal flow medium, and pumping in described dense-medium shallow-tank 1 by described second pipeline 5 with the form of upwelling medium, described 3rd pipeline 6 is by realizing the control of the flow of horizontal flow medium in dense-medium shallow-tank 1 to the shunting of horizontal flow medium in described first pipeline 4.
During production, if the amount of material handling is more in described dense-medium shallow-tank 1, the flow of horizontal flow medium is less, when needing the flow increasing horizontal flow medium, valve 7 can be turned down, sieving by reducing to enter sculping screen 3 flow that lower qualified medium collects chute, increasing the flow entering dense-medium shallow-tank 1 horizontal flow medium; Otherwise, if the flow of the horizontal flow medium of dense-medium shallow-tank 1 is larger, cause de-medium effectiveness poor, the consumption that is situated between is high, when needing the flow reducing horizontal flow medium, valve 7 can be opened greatly, increase and enter sculping screen 3 and sieve the flow that lower qualified medium collects chute, thus reach and reduce the damage that dense medium pump 2 is caused and the object reducing shallow slot 1 horizontal flow rate-of flow.
As a preferred embodiment of the present invention, between described sculping screen 3 and described dense medium pump 2, be provided with the medium bucket for storing separating medium, thus be convenient to dense medium pump 2 and stably can pump into qualified separating medium suspension in dense-medium shallow-tank 1.
In order to effectively monitor the density in medium bucket, the present invention is density of setting monitoring device in described medium bucket preferably.What those skilled in the art should understand that is, when the density of density monitoring device involutory Jie's bucket inner suspension liquid is monitored, easy generation monitoring is delayed, and then cause the delayed of Auto-regulating System of Density of Heavy Medium, have a strong impact on Auto-regulating System of Density of Heavy Medium precision and the stability of medium bucket inner suspension liquid, finally cause the instability of the product of coal quality sub-elected.In order to solve such problem, density monitoring device is preferably arranged on the discharging opening of medium bucket by the present invention, thus suspension is fully mixed in medium bucket, the density of the mixed suspension of medium bucket is flowed out in monitoring, ensures accuracy and the promptness of measuring density.
More preferably, described density monitoring device is density sensor, art technology people it should be understood that, above-mentioned density sensor is only a preferred embodiment of the present invention, the present invention can also according to actual installation situation adopt those skilled in the art other device of density being suitable for monitoring suspension of being familiar with, repeat no more herein.
As shown in Figure 2, present invention also offers a kind of for regulating the method for dense-medium shallow-tank horizontal flow, comprising the steps:
Step is 1.: start dense medium pump 2, in dense-medium shallow-tank 1, horizontal flow medium is pumped into by the first pipeline 4, in dense-medium shallow-tank 1, pump into upwelling medium by the second pipeline 5, described upwelling medium and described horizontal flow medium form separating medium gravitational field in described dense-medium shallow-tank 1;
Step is 2.: the valve 7 opening the 3rd pipeline 6 be arranged between sculping screen 3 and the first pipeline 4, pumps in described sculping screen 3 by the upwelling medium in described first pipeline 4;
Step is 3.: the flow if desired increasing horizontal flow medium in described first pipeline 4, the flow of medium in described 3rd pipeline 6 is then reduced by valve 7, otherwise, if desired reduce the flow of horizontal flow medium in described first pipeline 4, then increased the flow of medium in described 3rd pipeline 6 by valve 7;
Step is 4.: described dense-medium shallow-tank 1 relies on separating medium gravitational field to carry out sorting to material, and after sorting material, described separating medium flows in described sculping screen 3 and reclaims;
Step is 5.: the separating medium of recovery repeat step 1.-step 4., reuse.
Visible, flow for regulating the method for dense-medium shallow-tank horizontal flow not need to regulate dense medium pump provided by the invention, just can control the size of dense-medium shallow-tank horizontal flow, thus the damage avoided dense medium pump, decrease too fast due to horizontal flow velocity of medium and de-mediated that is that cause is incomplete, contribute to eliminating the problem being situated between and consuming and increase.
As a preferred embodiment of the present invention, between described sculping screen 3 and described dense medium pump 2, be provided with the medium bucket for storing separating medium, thus be convenient to dense medium pump 2 and stably can pump into qualified separating medium suspension in dense-medium shallow-tank 1.
In order to effectively monitor the density in medium bucket, the present invention is density of setting monitoring device in described medium bucket preferably.What those skilled in the art should understand that is, when the density of density monitoring device involutory Jie's bucket inner suspension liquid is monitored, easy generation monitoring is delayed, and then cause the delayed of Auto-regulating System of Density of Heavy Medium, have a strong impact on Auto-regulating System of Density of Heavy Medium precision and the stability of medium bucket inner suspension liquid, finally cause the instability of the product of coal quality sub-elected.In order to solve such problem, density monitoring device is preferably arranged on the discharging opening of medium bucket by the present invention, thus suspension is fully mixed in medium bucket, the density of the mixed suspension of medium bucket is flowed out in monitoring, ensures accuracy and the promptness of measuring density.
More preferably, described density monitoring device is density sensor, art technology people it should be understood that, above-mentioned density sensor is only a preferred embodiment of the present invention, the present invention can also according to actual installation situation adopt those skilled in the art other device of density being suitable for monitoring suspension of being familiar with, repeat no more herein.
Above-mentioned steps 2. in, described valve 7 preferably adopts squeezing valve, what those skilled in the art should understand that is, squeezing valve is only a kind of preferred version for controlling the 3rd piping flow size of the present embodiment, the present invention can also adopt other type valve of applicable control separating medium Fibre Suspensions known in those skilled in the art, repeats no more herein.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. for regulating a system for dense-medium shallow-tank horizontal flow, it is characterized in that, the sculping screen comprising dense-medium shallow-tank, dense medium pump and be arranged between described dense-medium shallow-tank and described dense medium pump, wherein,
The top of described dense-medium shallow-tank is provided with feeding mouth, and the bottom of described dense-medium shallow-tank is provided with slag-drip opening, described dense-medium shallow-tank is also provided with for the first inlet of input level flow medium and the second inlet for inputting upwelling medium;
Described dense medium pump is communicated with described first inlet by the first pipeline, described dense medium pump is communicated with described second inlet by the second pipeline, be provided with the 3rd pipeline between described first pipeline and described sculping screen, described 3rd pipeline be provided with the valve controlling flow.
2. according to claim 1ly it is characterized in that for regulating the system of dense-medium shallow-tank horizontal flow, between described sculping screen and described dense medium pump, being provided with the medium bucket for storing separating medium.
3. according to claim 2ly to it is characterized in that for regulating the system of dense-medium shallow-tank horizontal flow, in described medium bucket, being provided with density monitoring device.
4. according to claim 3ly it is characterized in that for regulating the system of dense-medium shallow-tank horizontal flow, described density monitoring device is density sensor.
5. the system for regulating dense-medium shallow-tank horizontal flow according to any one of claim 1-4, is characterized in that, described valve is squeezing valve.
6. for regulating a method for dense-medium shallow-tank horizontal flow, it is characterized in that, comprising the steps:
Step is 1.: start dense medium pump, in dense-medium shallow-tank, horizontal flow medium is pumped into by the first pipeline, in dense-medium shallow-tank, pump into upwelling medium by the second pipeline, described upwelling medium and described horizontal flow medium form separating medium gravitational field in described dense-medium shallow-tank;
Step is 2.: the valve opening the 3rd pipeline be arranged between sculping screen and the first pipeline, pumps in described sculping screen by the upwelling medium in described first pipeline;
Step is 3.: the flow if desired increasing horizontal flow medium in described first pipeline, the flow of medium in described 3rd pipeline is then reduced by valve, otherwise, if desired reduce the flow of horizontal flow medium in described first pipeline, then increased the flow of medium in described 3rd pipeline by valve;
Step is 4.: described dense-medium shallow-tank relies on separating medium gravitational field to carry out sorting to material, and after sorting material, described separating medium flows in described sculping screen and reclaims;
Step is 5.: the separating medium of recovery repeat step 1.-step 4., reuse.
7. according to claim 6ly it is characterized in that for regulating the method for dense-medium shallow-tank horizontal flow, between described sculping screen and described dense medium pump, being provided with the medium bucket for storing separating medium.
8. according to claim 7ly to it is characterized in that for regulating the method for dense-medium shallow-tank horizontal flow, in described medium bucket, being provided with density monitoring device.
9. according to claim 8ly it is characterized in that for regulating the method for dense-medium shallow-tank horizontal flow, described density monitoring device is density sensor.
10. the method for regulating dense-medium shallow-tank horizontal flow according to any one of claim 6-9, is characterized in that, described valve is squeezing valve.
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