CN101837320B - Heavy medium coal preparation control equipment, density control system thereof and density control method - Google Patents
Heavy medium coal preparation control equipment, density control system thereof and density control method Download PDFInfo
- Publication number
- CN101837320B CN101837320B CN 201010142595 CN201010142595A CN101837320B CN 101837320 B CN101837320 B CN 101837320B CN 201010142595 CN201010142595 CN 201010142595 CN 201010142595 A CN201010142595 A CN 201010142595A CN 101837320 B CN101837320 B CN 101837320B
- Authority
- CN
- China
- Prior art keywords
- density
- medium
- pipeline
- control
- control valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Liquid Carbonaceous Fuels (AREA)
Abstract
The invention discloses a density control system of heavy medium coal preparation control equipment. The heavy medium coal preparation control equipment comprises a medium barrel (26) and separation equipment, wherein the medium barrel (26) and the separation equipment are communicated by a pipe (24). The density control system comprises a detection device (21), a control device (21) and a regulation valve (23), wherein the regulation valve (23) is communicated with a water source (28) and a pipe (24); the detection device (21) detects the density of suspension in the pipe (24) between the regulation valve (23) and the separation equipment; the control device (22) receives a detected density signal and compares a detected density with a preset density; when the detected density is smaller than the preset density, the opening of the regulation valve (23) is controlled to reduce; when the detected density is equal to the preset density, the opening of the regulation valve (23) is controlled to be constant; and when the detected density is greater than the preset density, the opening of the regulation value (23) is controlled to increase. The density control system can reduce power consumption and production cost and can ensure the quality stability of a screen out concentrate coal product. The invention also discloses the heavy medium coal preparation control equipment and a density control method.
Description
Technical field
The present invention relates to Concentrating Field, particularly relate to a kind of density control system for heavy medium coal preparation control equipment.The invention still further relates to a kind of heavy medium coal preparation control equipment and a kind of heavy media coal separation method that comprises above-mentioned density control system.
Background technology
Along with the high speed development of Chinese national economy, energy resource consumption increases rapidly, and coal is as the main energy sources of China, and its consumption is also in continuous growth.
Be the utilization ratio that improves coal and the pollution that reduces environment, " clean coal technology plan " carried out by China.Coal separation is the basis of clean coal technology, and it fundamentally improves the quality of coal product, improves the utilization ratio and the pollution that alleviates atmosphere and environment of coal, can also improve significantly the economic benefit of coal mining enterprise simultaneously.Therefore, the development of quickening coal preparation industry is one of vital task of current coal industry.
Heavy media coal separation is a kind of in the coal preparation method that uses now, owing to have the sharpness of separation high, can obtain high-quality cleaned coal and higher recovery efficiency, so it can be applicable to the raw coal of various washabilitys, particularly the coal of difficult choosing and extremely difficult choosing.
The principle of heavy media coal separation is: utilize Archimedes's theorem, will float in suspension less than the particle of heavy-media suspension density, sink in suspension greater than the particle of heavy-media suspension density; Therefore, when coal separation, use the high mineral of a kind of density, levigate after and water blended together, allow it in water, suspend, be made into heavy suspension, such as: if heavy suspension density is 1.5, raw coal drops in the heavy suspension, so, density is floated less than 1.5 cleaned coal, and density is avaled greater than 1.5 middle coal and spoil, thereby realizes the selecting of coal of different densities.
Yet, because in the coal separation process, because the coal slime of carrying on the coal falls into suspension, the coal of perhaps selecting is taken away the dense media of suspension, even the reason such as system's water inlet, be easy to cause the density of suspension constantly to change, therefore, in the coal separation process, the density of control suspension just seems particularly important.
Understand for convenient, the technical term relevant with heavy media coal separation be explained as follows:
Heavy-media suspension: being mixed by granular solid (dense media), coal slime and water forms;
Density of suspending liquid: the weighted average of the density of dense media and coal slime, liquid (water) density;
Dense media: the solid of preparation heavy-media suspension, coal separation uses dense media select magnet breeze as medium solid usually;
Qualified medium suspension, or claim to be called for short qualified medium: the suspension with given density that feeds screening installation by work suspension;
Dense dielectric suspensions is called for short dense medium: the suspension that is higher than the qualified medium density of suspending liquid;
Loop suspension: obtain under product de-media sieve first paragraph sieve, density approaches or equals the suspension of separating density;
The stability of suspension: suspension is kept the constant character of autologous density;
Recirculated water: the water that reuses in the production system;
PID control: PID control;
PLC: Programmable Logic Controller.
Shunting: share the pressure on main line with several branch roads exactly, as the water yield in master stream behind the divarication will reduce.
Please refer to Fig. 1, Fig. 1 is the structural representation of a kind of typical heavy medium coal preparation control equipment in the prior art.
The heavy medium coal preparation control equipment of prior art comprises dense medium bucket 11, medium pump 12, qualified medium bucket 13 and density control system, connects by connecting line between dense medium bucket 11, medium pump 12, current divider box 14 and qualified medium bucket 13 each device.Density control system comprises checkout gear, control device and current divider box 14.
In the course of work, dense dielectric suspensions enters current divider box 14 under the effect of medium pump 12, current divider box 14 under the control of control device respectively along the direction of arrow C and arrow B to qualified medium bucket 13 and dense medium bucket 11 in shunting, the medium that enters qualified medium bucket 13 enters the mixing tank (not shown) along the direction shown in the arrow D under the effect of medium pump 12, carry out the mixing of institute's sorting coal and suspension; The medium that enters dense medium bucket 11 carries out pumping and sorting next time.
In the control procedure, checkout gear constantly detects the density of the suspension in the qualified medium bucket 13, obtain the density measurement signal, and transmit it to control device, control device compares and measures density and predetermined density, when density measurement during greater than predetermined density, and the shunting that control device control current divider box 14 is not given qualified medium bucket 14, the density of the suspension in the qualified medium bucket 13 is descended gradually, and convergence is until equal set-point; When density measurement equaled predetermined density, control device control current divider box 14 was failure to actuate, and dense dielectric suspensions returns dense medium bucket 11; When density measurement during less than predetermined density, control device control current divider box 14 increases the shunt volume that dense dielectric suspensions enters qualified medium bucket 13, and the density of the suspension in the qualified medium bucket is risen gradually, and convergence is until equal predetermined density.
Yet because dense dielectric suspensions easily produces precipitation in production system, in order to prevent that dense dielectric suspensions from producing precipitation in producing pipeline and container (dense medium bucket), guarantee the stability of suspension, must constantly play circulation with pump in process of production, thereby increased the wearing and tearing of equipment and pipeline, caused the increase of power consumption and the increase of production cost; On the other hand, because what checkout gear detected is the density of the suspension of qualified medium bucket, when needs increase dense dielectric suspensions and enter the shunt volume of qualified medium bucket, the time that dense dielectric suspensions and qualified medium suspension also need to grow can mix, hysteresis and next inaccuracy that constantly detects to the Auto-regulating System of Density of Heavy Medium of the suspension in the qualified medium bucket have been caused, when serious, also can cause overshoot, so that the variable density of the suspension in the qualified medium bucket is larger, the degree of regulation of system and less stable have caused the unstable of the head coal product quality that sub-elects.
Therefore, how to alleviate the wearing and tearing of equipment and pipeline, reduce power consumption and production cost in the heavy medium coal preparation process, the accuracy that raising is regulated density of suspending liquid, the stability of the stability of the density of assurance suspension and the head coal product quality that sub-elects just becomes the present technical issues that need to address of those skilled in the art.
Summary of the invention
The purpose of this invention is to provide a kind of Auto-regulating System of Density of Heavy Medium system, this density control system can alleviate the wearing and tearing of equipment and pipeline, reduce power consumption and production cost in the heavy medium coal preparation process, the accuracy that raising is regulated density of suspending liquid, the stability of the stability of the density of assurance suspension and the head coal product quality that sub-elects.Another object of the present invention provides a kind of heavy medium coal preparation control equipment and a kind of density control method that comprises above-mentioned density control system.
For solving the problems of the technologies described above, the invention provides a kind of density control system for heavy medium coal preparation control equipment, described heavy medium coal preparation control equipment comprises the medium bucket for splendid attire qualified medium suspension, and the screening installation that is used for minute coal separation, the two passes through pipeline connection, the density of described qualified medium suspension is greater than the required predetermined density of coal separation, described density control system comprises checkout gear, control device and control valve, and described control valve selectively is communicated with water source and described pipeline;
Described checkout gear detects the density of the suspension in the pipeline between described control valve and the described screening installation, obtains the detection density signal;
Described control device receives described detection density signal, and more described detection density and described predetermined density, and then controls the aperture of described control valve;
When described detection density during less than described predetermined density, the aperture that described control device is controlled described control valve reduces; When described detection density equaled described predetermined density, it is constant that described control device is controlled the aperture of described control valve; When described detection density during greater than described predetermined density, the aperture that described control device is controlled described control valve increases.
Preferably, also comprise medium pump, the pump intake of described medium pump is communicated with described medium bucket by the first pipeline of described pipeline, and the pump discharge of described medium pump is communicated with described screening installation by the second pipeline of described pipeline; Described control valve selectively is communicated with described water source and described the first pipeline.
Preferably, described checkout gear detects the density of the suspension in the described pump discharge.
Preferably, described checkout gear is density sensor.
Preferably, also comprise storage device, for the control parameter of detection signal and the described control device of storing described checkout gear.
For solving the problems of the technologies described above, the present invention also provides a kind of heavy medium coal preparation control equipment, comprises such as above-mentioned each described density control system.
For solving the problems of the technologies described above, the present invention also provides a kind of density control method for heavy medium coal preparation control equipment, described heavy medium coal preparation control equipment comprises control valve, is used for the medium bucket of splendid attire qualified medium suspension, and the described screening installation that is used for minute coal separation, the two passes through pipeline connection, described control valve selectively is communicated with described pipeline and water source, and the density of described qualified medium suspension is slightly larger than the required predetermined density of coal separation, may further comprise the steps:
1) density of the suspension in the pipeline between the described control valve of detection and the described screening installation;
2) receive described detection density signal, and more described detection density and described predetermined density; When described detection density during less than described predetermined density, turn to step 3); When described detection density equals described predetermined density, turn to step 1); When described detection density during greater than described predetermined density, turn to step 4);
3) reduce the aperture of described control valve;
4) aperture of the described control valve of increase.
Preferably, in step 1) in, the density of the medium in the pipeline between described control valve and the described screening installation detected by density sensor.
Density control system for heavy medium coal preparation control equipment provided by the present invention, heavy medium coal preparation control equipment comprises the medium bucket for splendid attire qualified medium suspension, and the screening installation that is used for minute coal separation, the two passes through pipeline connection, and the density of assurance qualified medium suspension is greater than the required predetermined density of coal separation, density control system comprises checkout gear, control device and control valve, and control valve selectively is communicated with water source and pipeline; In the control procedure, the density of the suspension in the pipeline between checkout gear detection control valve and the screening installation obtains the detection density signal; Control device receives the detection density signal, and compares detection density and predetermined density, and then the aperture of control and regulation valve; When detection density during less than predetermined density, the aperture of control device control and regulation valve reduces; When detection density equaled predetermined density, the aperture of control device control and regulation valve was constant; When detection density during greater than predetermined density, the aperture of control device control and regulation valve increases.Can find out, density control system provided by the present invention is that the aperture by the control valve that regulate to be communicated with water source and pipeline realizes the control to the density of the suspension that enters mixing tank, control to as if water, reduce the wearing and tearing of heavy-media suspension to e-quipment and pipe, reduced maintenance difficulties and the production cost of system; Simultaneously, density control system provided by the present invention has also been eliminated dense medium circulation system, has avoided the wearing and tearing of the system that dense medium causes and has prevented the power consumption that dense medium precipitation causes, and has further reduced production cost; On the other hand, because moisture and qualified medium all enter pipeline, and in pipeline, mix, the amount of moisture that mutually mixes and the ratio of qualified medium amount less (comparing with the ratio of qualified medium in the dense medium of the part of shunting in the prior art and the qualified medium bucket), can mix quickly, even the aperture of control valve is very little, also can mix in the short period of time, thereby improved the accuracy that checkout gear detects, and the degree of accuracy of control procedure, guarantee the stable of density of suspending liquid, improved the stability of the head coal product quality that sorts out.
In another kind of preferred embodiment, density control system for the dense medium separation system provided by the present invention also comprises medium pump, its pump intake is communicated with the medium bucket by the first pipeline of pipeline, its pump discharge is communicated with screening installation by the second pipeline of pipeline, and control valve selectively is communicated with water source and the first pipeline.The setting of medium pump has reduced the restriction for the placement location of medium bucket, moisture and qualified medium all can enter screening installation easily under the effect of medium pump, on the other hand, moisture and qualified medium can also mix under the effect of medium pump better, have improved the uniformity of the two mixing.
In another kind of preferred embodiment, the density that detects the suspension of described pump discharge for the density control system checkout gear of dense medium separation system provided by the present invention, not only can detect through the medium pump effect and mix more equably suspension, improve the accuracy of testing result, and the suspension after can detecting adjusting in the very first time, and then carry out next and regulate periodically, shortened the cycle of adjustment process, further improved the accuracy of control, thereby further guaranteed the stable of density of suspending liquid, improved the stability of the head coal product quality that sorts out.
Dense medium separation system provided by the present invention and be used for the beneficial effect of density control method of heavy medium coal preparation control equipment and the beneficial effect of density control system similar, do not repeat them here.
Description of drawings
Fig. 1 is the structural representation of a kind of typical heavy medium coal preparation control equipment in the prior art;
The structural representation of the Auto-regulating System of Density of Heavy Medium system that is used for heavy medium coal preparation control equipment that Fig. 2 provides for a kind of specific embodiment of the present invention;
The structural representation of the heavy medium coal preparation control equipment that Fig. 3 provides for a kind of specific embodiment of the present invention;
The structural representation of the Auto-regulating System of Density of Heavy Medium system that is used for heavy medium coal preparation control equipment that Fig. 4 provides for the second specific embodiment of the present invention;
The schematic flow sheet of the method for regulating density that is used for heavy medium coal preparation control equipment that Fig. 5 provides for a kind of specific embodiment of the present invention.
The specific embodiment
Core of the present invention provides a kind of Auto-regulating System of Density of Heavy Medium system, this density control system can alleviate the wearing and tearing of equipment and pipeline, reduce power consumption and production cost in the heavy medium coal preparation process, the accuracy that raising is regulated density of suspending liquid, the stability of the stability of the density of assurance suspension and the head coal product quality that sub-elects.Another core of the present invention provides a kind of heavy medium coal preparation control equipment and a kind of density control method that comprises above-mentioned density control system.
In order to make those skilled in the art person understand better the present invention program, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 2 and Fig. 3, the structural representation of the Auto-regulating System of Density of Heavy Medium system that is used for heavy medium coal preparation control equipment that Fig. 2 provides for a kind of specific embodiment of the present invention; The structural representation of the heavy medium coal preparation control equipment that Fig. 3 provides for a kind of specific embodiment of the present invention.
In a kind of specific embodiment, density control system for heavy medium coal preparation control equipment provided by the present invention, as shown in Figure 3, heavy medium coal preparation control equipment comprises the medium bucket 26 for splendid attire qualified medium suspension, and the screening installation (being the tempering tank 27 for mixing minute coal separation and suspension shown in the figure) that is used for minute coal separation, the two is communicated with by pipeline 24, and the density of the qualified medium suspension in the medium bucket 26 is greater than the required predetermined density of coal separation; As shown in Figures 2 and 3, density control system comprises checkout gear 21, control device 22 and control valve 23, and control valve 23 selectively is communicated with water source 28 and pipeline 24.
Predetermined density as herein described is the determined density value of density according to institute's coal separation, with the selection of the product of coal that satisfies a certain grade.
In the control procedure, the density of the suspension in the pipeline 24 that checkout gear 21 detects between control valve 23 and the screening installation obtains the detection density signal; Control device 22 receives the detection density signal, and compares detection density and predetermined density, and then the aperture of control and regulation valve 23; When detection density during less than predetermined density, the aperture of control device 22 control and regulation valves 23 reduces, thereby has reduced to enter the amount of moisture of the circulatory system, and the density of the suspension in the pipeline 24 is risen; When detection density equaled predetermined density, the aperture of control device 22 control and regulation valves 23 was constant; When detection density during greater than predetermined density, the aperture of control device 22 control and regulation valves 23 increases, and increases to enter the amount of moisture of the circulatory system, and the density of the suspension in the pipeline 24 is descended.
The aperture that reduces control valve 23 as herein described refers to the density according to the suspension in the density of the suspension in the pipeline 24 and the interpolation between the predetermined density and the medium bucket 26, suitably reduce the aperture of control valve 23, guarantee that all the time the density of the suspension in the pipeline 24 equals predetermined density; Certainly, if the density of the suspension in the medium bucket 26 equals predetermined density substantially, the aperture that can make control valve 23 is zero (namely closing control valve 23).
Can find out, density control system provided by the present invention is that the aperture by the control valve 23 that regulate to be communicated with water source 28 and pipeline 24 realizes the control to the density of the suspension that enters screening installation (mixing tank), control to as if water, reduce the wearing and tearing of heavy-media suspension to e-quipment and pipe, reduced maintenance difficulties and the production cost of system; Simultaneously, compare with the control system of prior art, density control system provided by the present invention has also been eliminated dense medium circulation system, has avoided the wearing and tearing of the system that dense medium causes and has prevented the power consumption that dense medium precipitation causes, and has further reduced production cost; On the other hand, because moisture and qualified medium all enter pipeline, and in pipeline, mix, the amount of moisture that mutually mixes and the ratio of qualified medium amount less (comparing with the ratio of qualified medium in the dense medium of the part of shunting in the prior art and the qualified medium bucket), can mix quickly, even the aperture of control valve 23 is very little, also can mix in the short period of time, thereby improved the accuracy that checkout gear 22 detects, and the degree of accuracy of control procedure, guarantee the stable of density of suspending liquid, improved the stability of the head coal product quality that sorts out.
In a kind of specific embodiment, as shown in Figure 3, density control system for the dense medium separation system provided by the present invention also comprises medium pump 25, its pump intake is communicated with medium bucket 26 by the first pipeline 241 of pipeline 24, its pump discharge is communicated with screening installation (being mixing tank 27 among the figure) by the second pipeline 242 of pipeline 24, and control valve 23 selectively is communicated with water source 28 and the first pipeline 241.
Like this, medium pump 25 the restriction that has reduced on the one hand for the placement location of medium bucket 26 is set, moisture and qualified medium all can enter screening installation easily under the effect of medium pump 25, on the other hand, moisture and qualified medium can also mix under the agitaion of medium pump 25 better, have improved the uniformity of the two mixing.
In the another kind of specific embodiment, density control system checkout gear 21 for the dense medium separation system provided by the present invention can detect the density of suspension of the pump discharge of medium pump 25, thereby, not only can detect through medium pump 25 and act on more equably suspension of mixing, improve the accuracy of testing result, and the suspension after can detecting adjusting in the very first time, and then carry out next and regulate periodically, shortened the cycle of adjustment process, further improved the accuracy of control, further guarantee the stable of density of suspending liquid, improved the stability of the head coal product quality that sorts out.
Particularly, above-mentioned detection device 21 can be density sensor, like this, can directly obtain the density of tested suspension, and testing process is simple.
Please refer to Fig. 4, the structural representation of the Auto-regulating System of Density of Heavy Medium system that is used for heavy medium coal preparation control equipment that Fig. 4 provides for the second specific embodiment of the present invention.
Density control system for heavy medium coal preparation control equipment provided by the present invention can also comprise storage device 29, is used for the detection signal of storage checkout gear 21 and the control parameter of control device 22.
Like this, coal preparation plant just can be according to the parameter of each coal separation and the quality of institute's coal separation, for next time coal separation provides reference, constantly improves the reliability of density control system and the quality of coal selecting product.
In addition, for solving the problems of the technologies described above, the present invention also provides a kind of heavy medium coal preparation control equipment, comprises that other structures of heavy medium coal preparation control equipment are same as the prior art such as above-mentioned each described density control system, and this paper repeats no more.
For solving the problems of the technologies described above, the present invention also provides a kind of density control method for heavy medium coal preparation control equipment.
Above-mentioned heavy medium coal preparation control equipment comprises control valve 23, is used for the medium bucket 26 of splendid attire qualified medium suspension, and the screening installation that is used for minute coal separation, and the two is communicated with by pipeline 24, and control valve 23 selectively is communicated with water source 28 and pipeline 24; The density of qualified medium suspension is slightly larger than the required predetermined density of coal separation.
Please refer to Fig. 5, the schematic flow sheet of the method for regulating density that is used for heavy medium coal preparation control equipment that Fig. 5 provides for a kind of specific embodiment of the present invention.
In a kind of specific embodiment, the method for regulating density for heavy medium coal preparation control equipment provided by the present invention may further comprise the steps:
Step S1: the density that detects the suspension in the pipeline 24 between control valve 21 and the screening installation.
Step S2: receive the detection density signal, judge that whether detection density is greater than predetermined density; If turn to step S5; If not, turn to step S3.
Step S3: judge that whether detection density is less than predetermined density; If turn to step S4; If not, turn to step S1.
Step S4: the aperture that increases control valve 23.
Step S5: the aperture that reduces control valve 23.
Density control method provided by the present invention is that the aperture by the control valve 23 that regulate to be communicated with water source 28 and pipeline 24 realizes the control to the density of the suspension that enters screening installation (mixing tank), control to as if water, reduce the wearing and tearing of heavy-media suspension to e-quipment and pipe, reduced maintenance difficulties and the production cost of system; On the other hand, because moisture and qualified medium all enter pipeline, and in pipeline, mix, the amount of moisture that mutually mixes and the ratio of qualified medium amount less (comparing with the ratio of qualified medium in the dense medium of the part of shunting in the prior art and the qualified medium bucket), can mix quickly, even the aperture of control valve 23 is very little, also can mix in the short period of time, thereby improved the accuracy that checkout gear 22 detects, and the degree of accuracy of control procedure, guarantee the stable of density of suspending liquid, improved the stability of the head coal product quality that sorts out.
Certainly, above-mentioned steps S2 and step S3 can exchange, if can finish detection density and predetermined density relatively.
Particularly, in step S1, by the density of the medium in the pipeline 24 between density sensor detection control valve and the screening installation.Like this, can simplify the testing process of tested density of suspending liquid.
More than heavy medium coal preparation control equipment provided by the present invention and density control system thereof and method are described in detail.Used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (7)
1. density control system that is used for heavy medium coal preparation control equipment, described heavy medium coal preparation control equipment comprises the medium bucket (26) for splendid attire qualified medium suspension, and the screening installation that is used for minute coal separation, the two is communicated with by pipeline (24), the density of described qualified medium suspension is greater than the required predetermined density of coal separation, it is characterized in that, described density control system comprises checkout gear (21), control device (22) and control valve (23), described control valve (23) selectively are communicated with water source (28) and described pipeline (24);
Described checkout gear (21) detects the density of the suspension in the pipeline (24) between described control valve (23) and the described screening installation, obtains the detection density signal;
Described control device (22) receives described detection density signal, and more described detection density and described predetermined density, and then controls the aperture of described control valve (23);
When described detection density during less than described predetermined density, the aperture that described control device (22) is controlled described control valve (23) reduces; When described detection density equaled described predetermined density, it is constant that described control device (22) is controlled the aperture of described control valve (23); When described detection density during greater than described predetermined density, the aperture that described control device (22) is controlled described control valve (23) increases;
Also comprise medium pump (25), the pump intake of described medium pump (25) is communicated with described medium bucket (26) by first pipeline (241) of described pipeline (24), and the pump discharge of described medium pump (25) is communicated with described screening installation by second pipeline (242) of described pipeline (24); Described control valve (23) selectively is communicated with described water source (28) and described the first pipeline (241); Described checkout gear (21) detects the density of suspending liquid of described the second pipeline (242).
2. density control system according to claim 1 is characterized in that, described checkout gear (21) detects the density of the suspension in the described pump discharge.
3. density control system according to claim 2 is characterized in that, described checkout gear (21) is density sensor.
4. according to claim 1 to 3 each described density control systems, it is characterized in that, also comprise storage device (29), for the control parameter of detection signal and the described control device (22) of storing described checkout gear (21).
5. a heavy medium coal preparation control equipment is characterized in that, comprises such as each described density control system of claim 1 to 4.
6. density control method that is used for heavy medium coal preparation control equipment, described heavy medium coal preparation control equipment comprises control valve (23), the medium bucket (26) that is used for splendid attire qualified medium suspension, and the described screening installation that is used for minute coal separation, the two is communicated with by pipeline (24), described control valve (23) selectively is communicated with described pipeline (24) and water source (28), also comprise medium pump (25), the pump intake of described medium pump (25) is communicated with described medium bucket (26) by first pipeline (241) of described pipeline (24), and the pump discharge of described medium pump (25) is communicated with described screening installation by second pipeline (242) of described pipeline (24); Described control valve (23) selectively is communicated with described water source (28) and described the first pipeline (241), and the density of described qualified medium suspension is slightly larger than the required predetermined density of coal separation, may further comprise the steps:
1) detects the density of the suspension in described second pipeline (242) of the pipeline (24) between described control valve (23) and the described screening installation;
2) receive described detection density signal, and more described detection density and described predetermined density; When described detection density during less than described predetermined density, turn to step 3); When described detection density equals described predetermined density, turn to step 1); When described detection density during greater than described predetermined density, turn to step 4);
3) reduce the aperture of described control valve (23);
4) increase the aperture of described control valve (23).
7. density control method according to claim 6, it is characterized in that, in step 1) in, the density of the medium in described second pipeline (242) of the pipeline (24) between described control valve (23) and the described screening installation detected by density sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010142595 CN101837320B (en) | 2010-04-09 | 2010-04-09 | Heavy medium coal preparation control equipment, density control system thereof and density control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010142595 CN101837320B (en) | 2010-04-09 | 2010-04-09 | Heavy medium coal preparation control equipment, density control system thereof and density control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101837320A CN101837320A (en) | 2010-09-22 |
| CN101837320B true CN101837320B (en) | 2013-04-03 |
Family
ID=42741134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010142595 Expired - Fee Related CN101837320B (en) | 2010-04-09 | 2010-04-09 | Heavy medium coal preparation control equipment, density control system thereof and density control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101837320B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071583B (en) * | 2013-01-28 | 2016-01-13 | 中国煤炭进出口公司 | The control method of density of heavy medium and system in a kind of dense-medium separation |
| CN104289304B (en) * | 2014-09-15 | 2017-01-11 | 中国神华能源股份有限公司 | Qualified medium barrel dilute medium water complementing system and method used for dense-medium coal preparation |
| CN104307623B (en) * | 2014-10-24 | 2017-02-22 | 中国神华能源股份有限公司 | System and method for adjusting horizontal flow in heavy-medium shallow tank |
| CN106861897A (en) * | 2017-02-24 | 2017-06-20 | 中国恩菲工程技术有限公司 | The control device of separator |
| CN107961895A (en) * | 2017-12-04 | 2018-04-27 | 安徽理工大学 | A kind of coal preparation plant's density control system clear water supplementing device and method |
| CN110605178B (en) * | 2019-09-23 | 2021-10-22 | 中国矿业大学 | Intelligent control system and method for heavy medium sorting process |
| CN110976062B (en) * | 2019-12-30 | 2020-08-25 | 内蒙古蒙西矿业有限公司 | Coal washing process capable of improving utilization rate |
| CN112058479A (en) * | 2020-09-03 | 2020-12-11 | 中国矿业大学 | Two-section separation density regulating device and method for three-product heavy medium cyclone |
| CN113210119A (en) * | 2021-04-13 | 2021-08-06 | 华电电力科学研究院有限公司 | Intelligent dense medium sorting system and working method thereof |
| CN114713100B (en) * | 2022-02-28 | 2022-12-20 | 中国神华能源股份有限公司哈尔乌素露天煤矿 | Anti-precipitation control method, system and storage medium |
| CN114653467B (en) * | 2022-03-09 | 2023-06-02 | 山西天地王坡煤业有限公司 | Medium adding method and device in heavy medium sorting process |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU367888A1 (en) * | 1967-06-19 | 1973-01-26 | Всесоюзный ордена Трудового Красного Знамени научно исследовательский , проектный институт механической обработки полезных ископаемых | DEVICE FOR REGULATING DENSITY SUSPENSIONS |
| SU1219141A2 (en) * | 1984-09-13 | 1986-03-23 | Voroshilov Sergej | Apparatus for separating non-magnetic materials by density |
| SU1220690A1 (en) * | 1984-10-22 | 1986-03-30 | Криворожский Ордена Трудового Красного Знамени Горно-Рудный Институт | Method of preparing heavy suspensions |
| US4838433A (en) * | 1979-04-11 | 1989-06-13 | Tatabanyai Szenbanyak | Process for the separation of rock refuse and coal products |
| 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 |
| SU1759476A1 (en) * | 1990-08-06 | 1992-09-07 | Луганский Филиал Государственного Проектно-Конструкторского И Научно-Исследовательского Института "Гипроуглеавтоматизация" | Automatic control system of suspension density in heavy-medium ore-dressing apparatus |
| CN1408480A (en) * | 2001-09-17 | 2003-04-09 | 安德里茨有限公司 | Method and device for separating impurites from suspension by floatation method |
| CN1424151A (en) * | 2002-12-31 | 2003-06-18 | 天地科技股份有限公司唐山分公司 | Process for heavy media separation of coarse coal slurry |
-
2010
- 2010-04-09 CN CN 201010142595 patent/CN101837320B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU367888A1 (en) * | 1967-06-19 | 1973-01-26 | Всесоюзный ордена Трудового Красного Знамени научно исследовательский , проектный институт механической обработки полезных ископаемых | DEVICE FOR REGULATING DENSITY SUSPENSIONS |
| US4838433A (en) * | 1979-04-11 | 1989-06-13 | Tatabanyai Szenbanyak | Process for the separation of rock refuse and coal products |
| SU1219141A2 (en) * | 1984-09-13 | 1986-03-23 | Voroshilov Sergej | Apparatus for separating non-magnetic materials by density |
| SU1220690A1 (en) * | 1984-10-22 | 1986-03-30 | Криворожский Ордена Трудового Красного Знамени Горно-Рудный Институт | Method of preparing heavy 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 |
| SU1759476A1 (en) * | 1990-08-06 | 1992-09-07 | Луганский Филиал Государственного Проектно-Конструкторского И Научно-Исследовательского Института "Гипроуглеавтоматизация" | Automatic control system of suspension density in heavy-medium ore-dressing apparatus |
| CN1408480A (en) * | 2001-09-17 | 2003-04-09 | 安德里茨有限公司 | Method and device for separating impurites from suspension by floatation method |
| CN1424151A (en) * | 2002-12-31 | 2003-06-18 | 天地科技股份有限公司唐山分公司 | Process for heavy media separation of coarse coal slurry |
Non-Patent Citations (1)
| Title |
|---|
| SU 367888 A1, |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101837320A (en) | 2010-09-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101837320B (en) | Heavy medium coal preparation control equipment, density control system thereof and density control method | |
| CN108993761B (en) | Coordination control method based on dense medium suspension density and liquid level | |
| CN110328049B (en) | Dense medium suspension density control system and control method thereof | |
| CN108993762B (en) | Density and liquid level control device for dense medium coal separation and coordination control method | |
| CN103350037B (en) | Overflow particle size control method for cyclone | |
| WO2020199817A1 (en) | Method for improving particle fluidization quality and separation density stability, and supporting device | |
| CN104289304B (en) | Qualified medium barrel dilute medium water complementing system and method used for dense-medium coal preparation | |
| CN106959606B (en) | Dynamic equalization in concentrate sorting system regulates and controls method | |
| CN110639686A (en) | Automatic adjusting system for density of coal separation dense medium and working method | |
| CN113210119A (en) | Intelligent dense medium sorting system and working method thereof | |
| CN101974860B (en) | Method for medium-consistency refining and pumping | |
| CN203076067U (en) | Medium preparation device used for dense-medium separation | |
| CN205797473U (en) | A kind of coal separation desliming system | |
| CN208066531U (en) | A kind of dense medium ash content closed-loop control system | |
| CN105964392A (en) | Coal dressing and desliming system | |
| CN201949691U (en) | Authigenic crystal seed circulating settling system | |
| CN103071583A (en) | Control method and control system of dense-medium density in dense-medium separation | |
| CN201287068Y (en) | Density control device of shallow-slot scraper dense-medium separator | |
| CN106362480A (en) | Efficient filtering method of concentrate pulp | |
| CN205341055U (en) | Accurate stable flotation liquid level detection and controlling means | |
| CN201843017U (en) | Middle-concentration pulping and pumping device | |
| CN205550543U (en) | Automatic change concentrate of dynamic equalization and select separately system | |
| CN106944240A (en) | The implementation method and device of a kind of thickening flotation technique of black water half | |
| CN212197568U (en) | Heavy-medium coal ash closed-loop control system | |
| AU2016204367A1 (en) | Concentrate sorting system with automatic dynamic equilibrium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130403 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |