CN104888930A - Shunt suspension characteristic adjusting device and method - Google Patents
Shunt suspension characteristic adjusting device and method Download PDFInfo
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- CN104888930A CN104888930A CN201510224563.3A CN201510224563A CN104888930A CN 104888930 A CN104888930 A CN 104888930A CN 201510224563 A CN201510224563 A CN 201510224563A CN 104888930 A CN104888930 A CN 104888930A
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Abstract
The invention discloses a shunt suspension characteristic adjusting device and a method, and is suitable for the characteristic adjustment of shunt suspension under a clean coal sieve bend. The device comprises a column body, wherein an overflow end cover having a center pipe is arranged at the top of the column body; a lower end cover is arranged at the bottom of the column body; a volute feed pipe is arranged on the side surface of the column body near the overflow end cover; a volute bottom flowing pipe is arranged on the side surface of the column body near the lower end cover, and is tangentially communicated with the column body; most of pulp in a centrifugal force field is dense; a cylindrical denser is arranged to remove one part of water from low-quality suspension, shunted from the clean coal sieve bend, by the suspension characteristic adjusting device through overflowing; and effectively separated fine coal mud and one part of ultrathin magnetite particles cannot be obtained from a coal mud heavy-medium cyclone. The fine coal mud incapable of being effectively separated out from the coal mud heavy-medium cyclone is discharged beforehand, so that the separation precision of the coal mud heavy-medium cyclone can be greatly improved. The shunt suspension characteristic adjusting device is simple in structure, quick in method and excellent in effect.
Description
Technical field
The present invention relates to a kind of shunting suspension characteristics adjusting device and method, especially a kind of shunting suspension characteristics adjusting device for using under coal preparation plant's No severing mud pressureless fed three-product dense-medium cyclone cleaned coal sieve bend and method.
Background technology
Lower point of coal preparation plant's No severing mud pressureless fed three-product dense-medium cyclone cleaned coal sieve bend flow to Slime dense medium cyclone sorting be a kind of use the widest slime separation technique, whole nation You Shangbaijia coal preparation plant uses, but generally reflect that this technique separating effect is poor, unstable product quality.With obtaining the bad existing problem of management of reason, also there is technical problem; Existing technological problems, also has plant issue.But main factor or technique built-in problem.Because the lower point flow medium of cleaned coal sieve bend comes from the cleaned coal outlet of pressureless fed three-product dense-medium cyclone, the qualified density of suspending liquid of its density ratio main separation is much lower, magnetic material content is much lower, and the density therefore shunting suspension is low, magnetic material content is low, poor stability; On the other hand the amount of shunting is proportionate with the coal slurry content in Triproduct heavy medium cyclone with pressureless feeding pan feeding, and the slime content bringing main separation into is larger, and shunt volume is larger, so shunt volume fluctuates.The root problem of Here it is current Slime dense medium cyclone sorting process.
For improving fine coal properties matter cyclone separating effect, many developers have carried out exploration and practice, 2013.05.02 a kind of method (CN103230829A) guaranteeing high separation precision of coal slime heavy medium hydrocyclone of Chinese invention patent of day application, propose the method that stable fine coal properties matter cyclone enters charging basket liquid level, but do not change suspension character; 2003.05.07 the Chinese invention patent heavy medium separating process for slime (CN1548233) of application, propose to change by reasonable disposition sculping screen sieve seam the method that Slime dense medium cyclone enters pulp suspension character, but low density problem does not still solve; 2006.12.31 a kind of simplified coal slurry dense-medium coal separation process (CN101011679) of the Chinese invention patent of application, the qualified medium of proposition main system is diverted to fine coal properties matter cyclone, thus change the method for fine coal properties matter cyclone pan feeding character, simplify system, solve density issue, but the rheological characteristic of suspension does not solve.
Summary of the invention
Technical problem: the object of the invention is the weak point overcome in prior art, there is provided a kind of structure simple, method is quick, effective, suspension characteristics is shunted under adjusting cleaned coal sieve bend, the fine fraction coal slime of effective sorting in fine coal properties matter cyclone can not discharge in advance, make shunting suspension characteristics parameter comprise shunting suspension characteristics adjusting device and the method that density, magnetic material content, stability etc. adjust to reasonable interval.
For realizing above-mentioned technical purpose, shunting suspension characteristics adjusting device of the present invention, comprises cylinder, and the top of cylinder is provided with the overflow end cap of band central tube, and the bottom of cylinder is provided with bottom end cover; The central tube that described effluent head the covers length stretched in cylinder is 1.5 times of column diameter, described cylinder upper left-hand is provided with feeding pipe near overflow end caps, cylinder lower right side is provided with underflow pipe near bottom end cover place, and feeding pipe and underflow pipe respectively or volute shape tangential with cylinder are connected through.
Described overflow end cap is connected with cylinder ring flange respectively with bottom end cover.
Use the shunting suspension characteristics method of adjustment of said apparatus, comprise the steps:
A. the low-quality suspension pump shunting out under cleaned coal sieve bend or level pressure funnel are fed feeding pipe;
B. the low-quality suspension fed in feeding pipe is in eddy current shape incision cylinder, forms the external spiral stream of decline and the inside spin stream of rising, under the dense effect of centrifugal force field, be divided into overflow and underflow by dense for low-quality suspension in the central tube of cylinder;
C. the granule that in low-quality suspension, terminal velocity is little and the liquid having little time to discharge from volute underflow pipe enter the inside spin stream of rising, the central tube covered from effluent head is discharged, and is about to the fine fraction coal slime of effective sorting in fine coal properties matter cyclone to discharge as overflow; The particle that in low-quality suspension, terminal velocity is large enters external spiral stream, discharge from the underflow pipe below cylinder, by relative thick coal particle, most media particle and the most of fluid separation applications in low-quality suspension out, thus the underflow suspension characteristics parameter that underflow pipe is discharged improves.
According to different dense media rotational flow sorting requirements, carry out adjustment by regulating the central tube diameter that covers of effluent head and underflow pipe diameter and centrifugal intensity and be coupled, make the suspension characteristics of underflow reach separating density requirement.
Beneficial effect: owing to have employed technique scheme, the present invention utilizes feeding pipe to make the low-quality suspension incision column body of injection form the inside spin stream of external spiral stream and the rising declined, the fine fraction coal slime of effective sorting in fine coal properties matter cyclone and part water can not follow inside spin stream and overflow from central tube, the fine slime that can not get effective sorting in fine coal properties matter cyclone is discharged in advance, improves the sorting environment of fine coal properties matter cyclone; The particle that terminal velocity is large enters external spiral stream, discharges from the underflow pipe below cylinder, thus effectively controls density, magnetic material content, stability, the rheological characteristic of discharging suspension, and density of suspending liquid can improve 0.1 ~ 0.3g/cm
3, magnetic material content can improve 10% ~ 20%; By increasing overfall tube diameter, reduce underflow pipe diameter, improve centrifugal intensity and strengthen the dense effect of suspension, realize non-online coarse adjustment by what regulate overfall tube diameter and underflow pipe diameter, and by regulating grouting pump rotating speed on-line control centrifugal intensity; Do not affect the suspension character of main separation system, also not by main separation system suspension liquid characteristics influence, the sorting deviation E value of fine coal properties matter cyclone is less than 0.08.Its structure is simple, and easy to operate, result of use is good, has practicality widely.
Accompanying drawing explanation
Fig. 1 is the main TV structure figure of shunting suspension characteristics adjusting device of the present invention.
Fig. 2 is the plan structure figure of shunting suspension characteristics adjusting device of the present invention.
In figure: 1. feeding pipe; 2. overflow end cap; 3. cylinder; 4. underflow pipe; 5. bottom end cover.
Detailed description of the invention
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
As depicted in figs. 1 and 2, shunting suspension characteristics adjusting device of the present invention, primarily of cylinder 3, feeding pipe 1 and underflow pipe 4 form, described cylinder 3 top is provided with the overflow end cap 2 of band central tube, the length stretching into cylinder 3 with the central tube that the overflow end cap 2 of central tube is arranged is 1.5 times of cylinder 3 diameter, bottom end cover 5 is provided with bottom cylinder 3, cylinder 3 side is provided with the feeding pipe 1 of volute near overflow end cap 2 place, tangential or the volute shape of feeding pipe 1 is passed through mutually with cylinder 3, cylinder 3 side is provided with the underflow pipe 4 of volute near bottom end cover 5 place, underflow pipe 4 tangentially passes through mutually with cylinder 3, and direction is consistent with the flow direction of pan feeding ore pulp.Described overflow end cap 2 and being connected by ring flange spiral between bottom end cover 5 with cylinder 3.
Shunting suspension characteristics method of adjustment of the present invention, concrete steps are as follows:
A. the low-quality suspension pump shunting out under cleaned coal sieve bend or level pressure funnel are fed feeding pipe 1;
B. low-quality suspension is cut cylinder 3 by volute feeding pipe 1 and is formed the external spiral stream of decline and the inside spin stream of rising around the central tube extended in cylinder 3, under the dense effect of centrifugal force field, is divided into overflow and underflow by dense for low-quality suspension;
C. the dense effect of centrifugal force field is utilized, the particle that in low-quality suspension, terminal velocity is little and the liquid having little time to discharge from underflow pipe 4 is made to enter the inside spin stream of rising, discharge from the central tube of the overflow end cap 2 of band central tube, make the fine fraction coal slime of effective sorting in fine coal properties matter cyclone to discharge as overflow, the particle that in low-quality suspension, terminal velocity is large enters external spiral stream, discharges from the underflow pipe 4 below cylinder 3; Thus the particle in low-quality suspension and partially liq are separated, the underflow suspension characteristics parameter that underflow pipe 4 is discharged improves.
According to different heavy medium cyclone sorting requirements, carry out adjustment coupling by the central tube diameter of the overflow end cap 2 of accommodation zone central tube and underflow pipe diameter and centrifugal intensity, the suspension characteristics of underflow just can be made to reach separating density requirement.
Described solids in suspension particle is coal slime and fine-grained magnetite powder, the suspension characteristics flowed out through suspension characteristics adjusting device underflow opening comprises the requirement that density, magnetic material content, stability and rheological characteristic etc. can meet fine coal properties matter cyclone, and its density can improve 0.1 ~ 0.3g/cm
3magnetic material content can improve 10% ~ 20%, the separating density of specifying is realized to specifying low-quality suspension, as long as carry out adjustment coupling to the central tube of suspension characteristics adjusting device and underflow pipe diameter and centrifugal intensity, the suspension characteristics of underflow just can be made to reach heavy medium cyclone sorting requirement.
Claims (4)
1. shunt a suspension characteristics adjusting device, it is characterized in that: it comprises cylinder (3), the top of cylinder (3) is provided with the overflow end cap (2) of band central tube, and the bottom of cylinder (3) is provided with bottom end cover (5); The central tube length stretched in cylinder (3) on described overflow end cap (2) is 1.5 times of cylinder (3) diameter, described cylinder (3) upper left-hand is provided with feeding pipe (1) near overflow end cap (2) place, cylinder (3) lower right side is provided with underflow pipe (4) near bottom end cover (5) place, and feeding pipe (1) and underflow pipe (4) respectively or volute shape tangential with cylinder (3) are connected through.
2. shunting suspension characteristics adjusting device according to claim 1, is characterized in that: described overflow end cap (2) is connected with cylinder (3) ring flange respectively with bottom end cover (5).
3. use a shunting suspension characteristics method of adjustment for device described in right 1, it is characterized in that comprising the steps:
A. the low-quality suspension pump shunting out under cleaned coal sieve bend or level pressure funnel are fed feeding pipe (1);
B. the low-quality suspension fed in feeding pipe (1) is in eddy current shape incision cylinder (3), the inside spin stream of external spiral stream and the rising declined is formed in the central tube of cylinder (3), under the dense effect of centrifugal force field, be divided into overflow and underflow by dense for low-quality suspension;
C. the granule that in low-quality suspension, terminal velocity is little and the liquid having little time to discharge from volute underflow pipe (4) enter the inside spin stream of rising, discharge from the central tube overflow end cap (2), be about to the fine fraction coal slime of effective sorting in fine coal properties matter cyclone to discharge as overflow; The particle that in low-quality suspension, terminal velocity is large enters external spiral stream, discharge from the underflow pipe (4) of cylinder (3) below, by relatively thick coal particle, most media particle and the most of fluid separation applications in low-quality suspension out, thus the underflow suspension characteristics parameter that underflow pipe (4) is discharged improves.
4. shunting suspension characteristics method of adjustment according to claim 3, it is characterized in that: according to different dense media rotational flow sorting requirements, by regulating the central tube diameter in overflow end cap (2) and underflow pipe diameter and centrifugal intensity to carry out adjustment coupling, the suspension characteristics of underflow is made to reach separating density requirement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510224563.3A CN104888930A (en) | 2015-05-05 | 2015-05-05 | Shunt suspension characteristic adjusting device and method |
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| CN201510224563.3A CN104888930A (en) | 2015-05-05 | 2015-05-05 | Shunt suspension characteristic adjusting device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114345542A (en) * | 2022-03-14 | 2022-04-15 | 中国矿业大学 | Single-system mineral separation process |
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| GB1510758A (en) * | 1975-10-30 | 1978-05-17 | Voith Gmbh J M | Method and apparatus for the treatment of fibrous suspensions |
| CN1053374A (en) * | 1990-01-15 | 1991-07-31 | 全苏铝镁电极工业科学研究设计院 | The equipment that is used for the suspension classification |
| CN1659333A (en) * | 2002-06-07 | 2005-08-24 | 美佐纸业股份有限公司 | Multi-stage screening apparatus, screen basket and method for screening pulp suspensions |
| CN1686615A (en) * | 2005-04-28 | 2005-10-26 | 复旦大学 | Mixture air floatation type dynamic vortex flow separation method and its device |
| EP1680543A1 (en) * | 2003-11-06 | 2006-07-19 | Metso Paper, Inc. | Screening apparatus and screen basket for screening pulp suspensions |
| CN201389497Y (en) * | 2009-03-06 | 2010-01-27 | 大庆石油学院 | Internal cone type liquid-liquid separation hydraulic swirler |
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2015
- 2015-05-05 CN CN201510224563.3A patent/CN104888930A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1510758A (en) * | 1975-10-30 | 1978-05-17 | Voith Gmbh J M | Method and apparatus for the treatment of fibrous suspensions |
| CN1053374A (en) * | 1990-01-15 | 1991-07-31 | 全苏铝镁电极工业科学研究设计院 | The equipment that is used for the suspension classification |
| CN1659333A (en) * | 2002-06-07 | 2005-08-24 | 美佐纸业股份有限公司 | Multi-stage screening apparatus, screen basket and method for screening pulp suspensions |
| EP1680543A1 (en) * | 2003-11-06 | 2006-07-19 | Metso Paper, Inc. | Screening apparatus and screen basket for screening pulp suspensions |
| CN1686615A (en) * | 2005-04-28 | 2005-10-26 | 复旦大学 | Mixture air floatation type dynamic vortex flow separation method and its device |
| CN201389497Y (en) * | 2009-03-06 | 2010-01-27 | 大庆石油学院 | Internal cone type liquid-liquid separation hydraulic swirler |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114345542A (en) * | 2022-03-14 | 2022-04-15 | 中国矿业大学 | Single-system mineral separation process |
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Application publication date: 20150909 |