CN105665156B - A kind of cleaning unit prevent run coal measures system and cleaning unit - Google Patents
A kind of cleaning unit prevent run coal measures system and cleaning unit Download PDFInfo
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- CN105665156B CN105665156B CN201610191067.7A CN201610191067A CN105665156B CN 105665156 B CN105665156 B CN 105665156B CN 201610191067 A CN201610191067 A CN 201610191067A CN 105665156 B CN105665156 B CN 105665156B
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- medium
- pan feeding
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- 239000003245 coal Substances 0.000 title claims abstract description 102
- 238000004140 cleaning Methods 0.000 title claims abstract description 35
- 230000006837 decompression Effects 0.000 claims abstract description 68
- 238000001514 detection method Methods 0.000 claims abstract description 51
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000000463 material Substances 0.000 claims description 34
- 238000007599 discharging Methods 0.000 claims description 8
- 238000007689 inspection Methods 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 description 9
- 239000003818 cinder Substances 0.000 description 8
- 230000005484 gravity Effects 0.000 description 8
- 238000000926 separation method Methods 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
- 239000000725 suspension Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 1
- 229910052683 pyrite Inorganic materials 0.000 description 1
- 239000011028 pyrite Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010117 shenhua Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C7/00—Apparatus not provided for in group B04C1/00, B04C3/00, or B04C5/00; Multiple arrangements not provided for in one of the groups B04C1/00, B04C3/00, or B04C5/00; Combinations of apparatus covered by two or more of the groups B04C1/00, B04C3/00, or B04C5/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C11/00—Accessories, e.g. safety or control devices, not otherwise provided for, e.g. regulators, valves in inlet or overflow ducting
Landscapes
- Cyclones (AREA)
Abstract
The present invention disclose a kind of cleaning unit prevent run coal measures system and cleaning unit, prevent run coal measures unite include：Detection unit, branch pipe and control valve, underflow mouth are connected or disconnected with the input and underflow pipe of branch pipe respectively by control valve；When detection unit, which has detected two product heavy-medium cyclone decompression states of pressure, to be occurred, the input of control control valve connection underflow mouth and branch pipe, and disconnect underflow mouth and underflow pipe；When detection unit, which has detected two product heavy-medium cyclone decompression states of pressure, to be recovered, control control valve disconnects the input of underflow mouth and branch pipe, and connection underflow mouth and underflow pipe.The present invention will have race coal of two product heavy-medium cyclones of pressure under decompression state to be reclaimed, and system operation technique is recovered into normal after decompression state is recovered normally.
Description
Technical field
The present invention relates to coal separation correlative technology field, particularly a kind of cleaning unit prevent run coal measures system and coal separation set
It is standby.
Background technology
Heavy medium cyclone is the equipment that a kind of utilization centrifugal force field reinforcing fine fraction ore particle is sorted in dense media, can be made
The difficult choosing of density difference small (± 0.1 content is big) selects fine also to obtain accurate sorting with extremely difficult.Device structure letter
Single, movement-less part, the efficiency of separation is high.For coal preparation industry, the material size upper limit of heavy medium cyclone can reach
50mm, effective lower limit of separation can reach 0.1mm, and with the change of cyclone specifications parameter, its material size and lower limit of separation
It can be varied from.In graded shot coal, the possible deviation E=0.02-0.06 of heavy medium cyclone, the efficiency of separation is high, together
When, due to the adjustability of its separating density, it can industrially use it to remove pyrite in coal sulphur.
By constantly developing, heavy medium cyclone can be divided into two series, two kinds of technological equipments：Can according to product category
It is divided into two series of two products and three products, i.e., requires once to produce two kinds (cleaned coal and spoils) for different atures of coal and user
With three kinds of (cleaned coal, middle coal and spoil) products.In coal preparation industry technological equipment, according to coal and to product quality requirement not
With pressurized feeding and unpressurized feeding two ways can be divided into again, after pressurized feeding mixes coal and dense media, with pump or level pressure side
Formula feeds cyclone, and unpressurized feeding is material that cyclone is directly fed under passive state, reduces crushing of the pump to material,
The upper size boundary of pan feeding can be increased again.
Heavy medium cyclone must by heavy-media suspension and coal cinder, (its general granularity be small by a centrifugal pump before work
In 50mm) mixed material squeezes into heavy medium cyclone device intracavitary, and tangential direction of the direction along cone-shaped cavity is pumped into, so
Since, mixed material just can rotate along cyclone internal chamber wall.Meanwhile, heavy medium cyclone typically tilts installation, rotation
It is 10 ° to flow device axis with horizontal sextant angle, and down, overflow lip is upward for underflow mouth.
When mixed material rotates in cyclone intracavitary, separated, be more than by the effect of gravity and centrifugal force
The spoil of density of suspending liquid, the direction of suffered active force is identical with centrifugal acceleration direction, makees centrifugal motion in suspension, collection
In outer layer formation waste pack, due to hindered falling effect, be close to wall is big spoil, next to that medium size, small grain size
Spoil, merges into screw and is discharged along wall by underflow mouth.Less than the coal of density of suspending liquid, make centripetal fortune in cyclone
It is dynamic, and concentrate near the central shaft of cyclone and form middle coal and cleaned coal band in vorticla motion, near overflow pipe, due to overflow
Secondary sorting occurs for the eddy current effect of bottom, and cleaned coal is discharged along overflow pipe, middle coal and spoil will eddy flow again, middle ribbing is in light particle
Weight particle between play barrier, at this relatively low middle coal of ash content can move to underflow mouth direction, as tail coal discharge or with
Cleaned coal is discharged along overflow pipe.Therefore, in the heavy medium cyclone course of work, material is in device intracavitary by centrifugal force, suspension
Buoyancy and material itself the effect of three kinds of power of gravity, due to the difference of material population density, centrifugal force, buoyancy suffered by it
Can be different, by the interaction of two kinds of power, material is separated according to density difference, made by the gravity of material itself
With, weight product material is moved downward along inclinator chamber, discharged eventually through underflow mouth, and low-density concentrate product is in device intracavitary
Move, discharged eventually through overflow lip upwards in the presence of suction, therefore, material is in cyclone by the phase interaction of three kinds of power
With finally determining its whereabouts.
Generally, coal preparation plant need to be constituted according to raw coal size in technological design, just, density composition, argillization it is special
Property and the key element such as quality requirement to product, dense medium cyclone carries out type selecting and mounting process is designed.Install
Heavy medium cyclone afterwards, it is in the course of the work, different according to ature of coal, can by adjust pan feeding revolution speed and pan feeding solid-to-liquid ratio come
Separating effect is adjusted, generally, feed pressure during heavy medium cyclone normal work is 1.3Kpa, but there are two productions of pressure
When product heavy medium cyclone starts and when accident is stopped suddenly, because the viscosity of heavy-media suspension is higher, cyclone during startup
Pan feeding revolution speed will reach that setting value needs the regular hour, and in unexpected parking, pan feeding pump can power off stopping suddenly, cause
Material rapid decompression in heavy medium cyclone, above-mentioned two situations can cause heavy medium cyclone intracavitary material by conducting oneself with dignity the bottom of from
Stem bar is discharged, so as to cause cleaned coal to lose, such a phenomenon is extremely widespread in heavy medium cyclone use.
For the eastern washing center Ulan Mulun coal preparation plant of Shenhua god, its smalls system uses import Krebs D48 " φ
(diameter 1200mm's) has two product heavy-medium cyclones of pressure, and pan feeding pump uses import MM400-D43U cyclone pan feeding pumps,
Motor uses 500KW model YPT 450-6 frequency converting speed regulating three-phase asynchronous electromotor, and bottom often occurs in actual applications
Stem bar runs coal phenomenon, is analyzed by field observation, and the reason for heavy medium cyclone underflow mouth runs coal phenomenon occurs in system and summarizes
It is as follows：
1st, during disastershutdown, with the unexpected power-off of heavy medium cyclone pan feeding pump, pan feeding impeller of pump is in pan feeding pipeline
Stop rapidly under the recoil resistance of material, and cyclone intracavitary leftover materials, with the disappearance of feed pressure, material is in device intracavitary
Centrifugal force in three kinds of suffered active forces fades away, and device intracavitary material gradually changes motion state under gravity,
Screw is gradually destroyed, then by the downward first motion of Action of Gravity Field, intracavitary material is under gravity as underflow mouth is run
Go out, so as to form race coal accident.
2nd, when accident opens car, due to there being part coal after disastershutdown in dense media mixing tank, with heavy medium cyclone
The rotating speed of pan feeding pump gradually rises, and material enters cyclone device intracavitary by pipeline, but because heavy-media suspension viscosity is higher,
Particularly the disastershutdown time is longer, and suspension sedimentation is more obvious in mixing tank, and impeller drag is got over during cyclone pan feeding pump startup
Greatly, cyclone pan feeding pump reaches longer the time required to rated speed (by taking Ulan Mulun coal preparation plant as an example, in 30 points of disastershutdown
Car is opened after clock, heavy medium cyclone reaches that the rated speed time is about 30 seconds), squeeze into cyclone intracavitary with cyclone pan feeding pump
Material, because feed pressure is not enough, centrifugal force is smaller in three kinds of suffered power, it is impossible in the formation eddy motion of device intracavitary,
Interior suction effect can not be more formed in device intracavitary, therefore, this partial material is under gravity along the downward first motion of device chamber, intracavitary
Material is run out of with underflow mouth under gravity, so as to form race coal accident.
The content of the invention
Based on this, it is necessary to for prior art when using there is two product heavy-medium cyclones of pressure decompression state occur,
Easily cause the technical problem of race coal prevents that running coal measures unites and cleaning unit there is provided a kind of cleaning unit.
The present invention provide a kind of cleaning unit prevent run coal measures system, the cleaning unit includes two product dense media of pressure
Cyclone, the underflow mouth for having two product heavy-medium cyclones of pressure is connected with underflow pipe, described to prevent that running coal measures system includes：Inspection
Survey unit, branch pipe and control valve, the underflow mouth by the control valve respectively with the input of the branch pipe and
The underflow pipe connection disconnects；
When the detection unit detect it is described there are two product heavy-medium cyclone decompression states of pressure to occur when, control is described
Control valve connects the input of the underflow mouth and the branch pipe, and disconnects the underflow mouth and the underflow pipe；
When the detection unit detect it is described there are two product heavy-medium cyclone decompression states of pressure to recover when, control is described
Control valve disconnects the input of the underflow mouth and the branch pipe, and connects the underflow mouth and the underflow pipe.
Further, the cleaning unit also includes what is connected with the feeding mouth for having two product heavy-medium cyclones of pressure
Cyclone pan feeding pump, the detection unit detects the frequency of the cyclone pan feeding pump, when the frequency of the cyclone pan feeding pump
Less than default decompression state occurrence frequency threshold value, then there are two product heavy-medium cyclone decompression states of pressure described in judgement, when
The frequency of the cyclone pan feeding pump is higher than default decompression state and recovers frequency threshold, then has two product dense media of pressure described in judgement
Cyclone decompression state is recovered.
Further, in addition to be arranged on the frequency sensor of the cyclone pan feeding pump, the frequency sensor it is defeated
Go out end to be connected with the input end signal of the detection unit.
Further, there is the feed pressure in two product heavy-medium cyclones of pressure described in the detection unit detection, work as institute
State feed pressure and be less than default decompression state generation pressure threshold, then there are two product heavy-medium cyclone decompression shapes of pressure described in judgement
State occurs, and recovers pressure threshold when the feed pressure is higher than default decompression state, then has two product dense media of pressure described in judgement
Cyclone decompression state is recovered.
Further, the feeding mouth for having two product heavy-medium cyclones of pressure is provided for detecting the pressure of feed pressure
Sensor, the output end of the pressure sensor is communicated to connect with the detection unit.
Further, the discharging opening of the cyclone pan feeding pump has two product dense media eddy flows of pressure by pan feeding valve with described
The feeding mouth connection of device, the discharging opening of the cyclone pan feeding pump is also connected by self-loopa valve with feed back bucket；
When the detection unit detect it is described there are two product heavy-medium cyclone decompression states of pressure to occur when, control is described
Pan feeding valve is closed, and controls the self-loopa valve to open；
When the detection unit detect it is described there are two product heavy-medium cyclone decompression states of pressure to recover when, control is described
Pan feeding valve is opened, and controls the self-loopa valve to close.
Further, the head coal sculpingscreen is additionally provided with cleaned coal baffle-box, the output end of the branch pipe and the cleaned coal
The cleaned coal baffle-box connection of sculping screen.
Further, the cleaning unit also includes feed back bucket and cyclone pan feeding pump, and the cyclone pan feeding pump goes out
Material mouth is connected with the feeding mouth for having two product heavy-medium cyclones of pressure, the suction of the feed back bucket and the cyclone pan feeding pump
Material mouth is connected, and the output end of the branch pipe is connected with feed back bucket.
Further, the control valve includes the first control magnetic valve and the second control magnetic valve, the underflow mouth
Connect or disconnect with the input of the branch pipe by the described first control magnetic valve, the underflow mouth is controlled by described second
Magnetic valve is connected or disconnected with the underflow pipe；
When the detection unit detect it is described there are two product heavy-medium cyclone decompression states of pressure to occur when, control is described
First control magnetic valve is opened, and controls the second control closed electromagnetic valve；
When the detection unit detect it is described there are two product heavy-medium cyclone decompression states of pressure to recover when, control is described
First control closed electromagnetic valve, and control the second control magnetic valve to open.
The present invention provides a kind of cleaning unit, includes two product heavy-medium cyclones of pressure, described to have two product dense mediums of pressure
The underflow mouth of matter cyclone is connected with underflow pipe, in addition to prevents from running coal measures system as previously described.
The present invention in decompression state by there is two product heavy-medium cyclones of pressure to carry out decompression state-detection, occurring with losing
The connection of control underflow mouth and underflow pipe when pressure condition recovers, so as to will have two product heavy-medium cyclones of pressure under decompression state
Race coal reclaimed, and decompression state recover it is normal after system operation technique recovered normal.
Brief description of the drawings
Fig. 1 prevents from running the structural representation of coal measures system for a kind of cleaning unit of the invention；
Fig. 2 prevents from running the workflow diagram of coal measures system for the present invention；
Fig. 3 prevents from running the structural representation of coal measures system for another embodiment of the present invention.
Embodiment
The present invention will be further described in detail with specific embodiment below in conjunction with the accompanying drawings.
Prevent from running the structural representation of coal measures system, the cleaning unit as shown in Figure 1 for a kind of cleaning unit of the invention
Include two product heavy-medium cyclones 1 of pressure, the underflow mouth 11 for there are two product heavy-medium cyclones 1 of pressure connects with underflow pipe 3
It is logical, it is described to prevent that running coal measures system includes：Detection unit, branch pipe 2 and control valve 4, the underflow mouth 11 pass through the control
Valve 4 is connected or disconnected with the input and the underflow pipe 3 of the branch pipe 2 respectively；
As shown in Fig. 2 its detecting step is：
Step S201, described has two product heavy-medium cyclone decompression states of pressure when the detection unit is detected
When, control the control valve 4 to connect the input of the underflow mouth 11 and the branch pipe 2, and disconnect the underflow mouth 11 and
The underflow pipe 3；
Step S202, described has two product heavy-medium cyclone decompression states of pressure to recover when the detection unit is detected
When, control the control valve 4 to disconnect the input of the underflow mouth 11 and the branch pipe 2, and connect the underflow mouth 11 and
The underflow pipe 3.
This control system and technological design have two product heavy-medium cyclones of pressure in specific feelings for insoluble at present
Decompression under condition causes underflow mouth to run coal problem, devises one kind and is reclaimed using program Automatic Detection and Control, by technological design
Run the device of coal, i.e. design and invent a kind of system and technique for preventing heavy medium cyclone underflow from running coal.
The present invention is made up of two parts, respectively detection unit and the technique time being made up of branch pipe 2 and control valve 4
Receipts system.
Detection unit is preferably single-chip microcomputer, and the effect of detection unit is：There are two product heavy-medium cyclones of pressure by detection
Whether under decompression state, and whether decompression state is recovered, and controls with this operation of technique recovery system.
The effect of technique recovery system is：By technological design, the signal transmitted with reference to detecting and controlling system, there will be pressure two
Race coal of the product heavy-medium cyclone under decompression state is reclaimed, and by system operation work after decompression state is recovered normally
Skill recovers normal.
The present invention in decompression state by there is two product heavy-medium cyclones of pressure to carry out decompression state-detection, occurring with losing
The connection of control underflow mouth and underflow pipe when pressure condition recovers, so as to will have two product heavy-medium cyclones of pressure under decompression state
Race coal reclaimed by branch pipe, and decompression state recover it is normal after system operation technique recovered normal.
In one of the embodiments, the cleaning unit also includes having entering for two product heavy-medium cyclones of pressure with described
The cyclone pan feeding pump that material mouth 13 is connected, the detection unit detects the frequency of the cyclone pan feeding pump, when the cyclone
The frequency of pan feeding pump is less than default decompression state occurrence frequency threshold value, then has two product heavy-medium cyclone decompressions of pressure described in judgement
State occurs, and recovers frequency threshold when the frequency of the cyclone pan feeding pump is higher than default decompression state, then has pressure described in judgement
Two product heavy-medium cyclone decompression states are recovered.
In view of there is the product heavy-medium cyclones 1 of pressure two itself unpowered, its material power resources in cyclone pan feeding pump, and
The decompression state and the rotating speed (frequency) of cyclone pan feeding pump for having two product heavy-medium cyclones 1 of pressure have direct relation, therefore, this
Embodiment, the rotating speed (frequency) of cyclone pan feeding pump is set as to detect object.Generally, the rotating speed of cyclone pan feeding pump
(frequency) has setting value in normal operation, therefore, this setting value can as detection unit control standard, can be by decompression
State occurrence frequency threshold value and decompression state recover frequency threshold and are set as the setting value.Detected in real time just by detection unit
Rotating speed (frequency) numerical value of cyclone pan feeding pump, is contrasted with setting value when often running, when detecting that numerical value is less than setting value,
Detection unit starts control program immediately, by the valve for controlling to set in technique recovery pipe, just can realize the recovery for running coal.
Meanwhile, after normal operation, the rotating speed (frequency) for the cyclone pan feeding pump that detection unit is measured is reached after setting value, is just opened again
Dynamic control program, by the control valve 4 for controlling to set in technique recovery pipe, just can realize the recovery of production system.
In one of the embodiments, in addition to it is arranged on the frequency sensor of the cyclone pan feeding pump, the frequency
The output end of sensor is connected with the input end signal of the detection unit.
In one of the embodiments, there is the pan feeding in two product heavy-medium cyclones of pressure described in the detection unit detection
Pressure, occurs pressure threshold when the feed pressure is less than default decompression state, then has two product dense medium cyclones of pressure described in judgement
Stream device decompression state occurs, and recovers pressure threshold when the feed pressure is higher than default decompression state, then has pressure two described in judgement
Product heavy-medium cyclone decompression state is recovered.
In dense medium cyclone normal work, its feed pressure maintains operating pressure, can reach preferably sorting effect
Really.When its pan feeding pump breaks down parking, the feed pressure can be rapidly decreased to 0.Therefore, feed pressure be pan feeding pump whether
The important testing conditions of normal work, if feed pressure is reduced rapidly, you can judge that pan feeding pump there occurs failure.
In one of the embodiments, the feeding mouth 13 for having two product heavy-medium cyclones of pressure be provided for detecting into
Expect the pressure sensor of pressure, the output end of the pressure sensor is communicated to connect with the detection unit.
In one of the embodiments, the cleaning unit also include head coal sculpingscreen 5, the output end of the branch pipe 2 with
The head coal sculpingscreen 5 is connected.
Head coal sculpingscreen 5 is recovered in cleaned coal system for coal cinder.In the present embodiment, the coal cinder flowed out from branch pipe 2 will
Head coal sculpingscreen 5 is flowed to, and is recovered to by head coal sculpingscreen 5 in cleaned coal system, realizes and reclaims.
In one of the embodiments, the head coal sculpingscreen 5 is additionally provided with cleaned coal baffle-box 51, the output of the branch pipe 2
End is connected with the cleaned coal baffle-box 51 of the head coal sculpingscreen 5.
The present embodiment increase cleaned coal baffle-box 51 is so that the coal cinder reclaimed from branch pipe 2 is buffered.
As shown in figure 3, in one of the embodiments, the cleaning unit also includes feed back bucket 14 and cyclone pan feeding pump
15, the discharging opening 151 of the cyclone pan feeding pump 15 is connected with the feeding mouth 13 for having two product heavy-medium cyclones of pressure, institute
State feed back bucket 14 to connect with the material sucking port 152 of the cyclone pan feeding pump 15, output end and the feed back bucket 14 of the branch pipe 2
Connection.
The coal cinder that the present embodiment directly reclaims branch pipe 2 sends into the material sucking port of cyclone pan feeding pump, to cause the coal reclaimed
Block can more directly send into feeding mouth 13.
In one of the embodiments, the discharging opening 151 of the cyclone pan feeding pump 15 has by pan feeding valve 16 with described
The feeding mouth 13 of two product heavy-medium cyclones is pressed to connect, the discharging opening 151 of the cyclone pan feeding pump 15 also passes through self-loopa
Valve 17 is connected with feed back bucket；
When the detection unit detect it is described there are two product heavy-medium cyclone decompression states of pressure to occur when, control is described
Pan feeding valve 16 is closed, and controls the self-loopa valve 17 to open；
When the detection unit detect it is described there are two product heavy-medium cyclone decompression states of pressure to recover when, control is described
Pan feeding valve 16 is opened, and controls the self-loopa valve 17 to close.
The present embodiment, the discharging opening of pan feeding pump 15 is by feeding pipe 19 and has the feeding mouth 13 for pressing two product heavy-medium cyclones
Connection, is connected by self-circulation pipeline 18 with feed back bucket 14.When detection unit detects the generation of decompression state, pan feeding valve is closed
16, self-loopa valve 17 is opened, coal cinder is recovered in feed back bucket 14 by self-circulation pipeline 18 and kept in.Work as removal of faults on system
Afterwards, closing pan feeding valve 16 is remained in that, self-loopa valve 17 is opened, the restarting of pan feeding pump is not up to setting in the revolution of pump and turned
When number or feed pressure are not up to preset pressure, detection unit is still detected as the generation of decompression state, and pan feeding pump is in circulation
Feed pattern.When the revolution of pump reaches that setting revolution or feed pressure reach preset pressure, detection unit detects decompression
State is recovered, and closes pan feeding valve 16, opens self-loopa valve 17, at the same control the control valve 4 disconnect the underflow mouth 11 with
The input of the branch pipe 2, and the underflow mouth 11 and the underflow pipe 3 are connected, system recovers normal sorting state.
In one of the embodiments, the control valve 4 includes the first control control magnetic valve of magnetic valve 41 and second
42, the underflow mouth 11 is connected or disconnected with the input of the branch pipe 2 by the described first control magnetic valve 41, the underflow
Mouth 11 is connected or disconnected with the underflow pipe 3 by the described second control magnetic valve 42；
When the detection unit detect it is described there are two product heavy-medium cyclone decompression states of pressure to occur when, control is described
First control magnetic valve 41 is opened, and controls the second control magnetic valve 42 to close；
When the detection unit detect it is described there are two product heavy-medium cyclone decompression states of pressure to recover when, control is described
First control magnetic valve 41 is closed, and controls the second control magnetic valve 42 to open.
The present embodiment controls the break-make of underflow mouth 11 and branch pipe 2 and underflow pipe 3 using two control valves 41,42 respectively.
In one of the embodiments, the input of the branch pipe 2 is higher than the output end of the branch pipe 2.
The input of branch pipe 2 is higher than output end so that branch pipe 2 has certain inclination angle, is easy to stream of the coal cinder in branch pipe 2
It is dynamic.
As preferred embodiment, using the frequency of cyclone pan feeding pump as detection object.
Implement process as follows：
(1) after the control of pan feeding failure of pump collection is stopped, the first control control magnetic valve 42 of magnetic valve 41 and second is acted simultaneously,
The wherein first control action of magnetic valve 41 is opened, and the second control action of magnetic valve 42 is closed.
After pan feeding failure of pump is excluded, pan feeding pump is restarted, when the rotating speed of cyclone pan feeding pump reaches that collection control program is set
During fixed numerical value, the first control control magnetic valve 42 of magnetic valve 41 and second act simultaneously, wherein first controls magnetic valve 41 dynamic
Close, the second control action of magnetic valve 42 is opened.
Arranged and process characteristic according to there is space of two product heavy-medium cyclones of pressure in coal preparation plant applies：Therefore, exist
Have two product heavy-medium cyclones 1 of pressure underflow mouth 11 underflow case 111 on tee pipe fitting is set, the tee pipe fitting enters
Mouth is connected with underflow case 111, and one outlet is connected or disconnected with branch pipe 2 by the first control magnetic valve 41, and another outlet is logical
Cross the second control magnetic valve 42 to connect or disconnect with underflow pipe 3, underflow pipe 3 is connected with the spoil baffle-box 61 of Coal Stone Separation 6,
Branch pipe 2 is connected with the cleaned coal baffle-box 51 of head coal sculpingscreen 5, and coal cinder is via head coal sculpingscreen 5 through being back in cleaned coal system.
Prevent that running coal measures unites, and while coal preparing plant automation level is improved, can effectively solve using the present invention
There are two product heavy-medium cyclone decompressions of pressure to run coal problem, have in terms of economizing on resources and improving the economic benefit of enterprise positive
Effect.
As shown in figure 1, being a kind of structural representation of cleaning unit of the invention, include two product heavy-medium cyclones of pressure
1, the underflow mouth 11 for having two product heavy-medium cyclones 1 of pressure is connected with underflow pipe 3, in addition to prevents from running coal as previously described
System.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of cleaning unit prevent run coal measures system, the cleaning unit include pressure two product heavy-medium cyclones, it is described
The underflow mouth for having two product heavy-medium cyclones of pressure is connected with underflow pipe, it is characterised in that described to prevent that running coal measures system includes：Inspection
Survey unit, branch pipe and control valve, the underflow mouth by the control valve respectively with the input of the branch pipe and
The underflow pipe connection disconnects；
When the detection unit detect it is described there are two product heavy-medium cyclone decompression states of pressure to occur when, control the control
Valve connects the input of the underflow mouth and the branch pipe, and disconnects the underflow mouth and the underflow pipe；
When the detection unit detect it is described there are two product heavy-medium cyclone decompression states of pressure to recover when, control the control
Valve disconnects the input of the underflow mouth and the branch pipe, and connects the underflow mouth and the underflow pipe.
2. cleaning unit according to claim 1 prevent run coal measures system, it is characterised in that the cleaning unit also includes
The cyclone pan feeding pump connected with the feeding mouth for having two product heavy-medium cyclones of pressure, the detection unit detects the rotation
The frequency of device pan feeding pump is flowed, when the frequency of the cyclone pan feeding pump is less than default decompression state occurrence frequency threshold value, is then judged
It is described to have two product heavy-medium cyclone decompression states of pressure, when the frequency of the cyclone pan feeding pump is higher than default decompression shape
State recovers frequency threshold, then has two product heavy-medium cyclone decompression states of pressure to recover described in judgement.
3. cleaning unit according to claim 2 prevent run coal measures system, it is characterised in that also including being arranged on the rotation
The frequency sensor of device pan feeding pump is flowed, the output end of the frequency sensor is connected with the input end signal of the detection unit.
4. the preventing of cleaning unit according to claim 1 runs coal measures system, it is characterised in that the detection unit detects institute
The feed pressure in two product heavy-medium cyclones of pressure is stated, occurs pressure threshold when the feed pressure is less than default decompression state
Value, then have two product heavy-medium cyclone decompression states of pressure described in judgement, when the feed pressure is higher than default decompression shape
State recovers pressure threshold, then has two product heavy-medium cyclone decompression states of pressure to recover described in judgement.
5. cleaning unit according to claim 4 prevent run coal measures system, it is characterised in that it is described have pressure two product dense mediums
The feeding mouth of matter cyclone be provided for detect feed pressure pressure sensor, the output end of the pressure sensor with it is described
The input end signal connection of detection unit.
6. cleaning unit according to claim 1 prevent run coal measures system, it is characterised in that the cleaning unit also includes
Head coal sculpingscreen, the output end of the branch pipe is connected with the head coal sculpingscreen.
7. cleaning unit according to claim 1 prevent run coal measures system, it is characterised in that the cleaning unit also includes
Feed back bucket and cyclone pan feeding pump, the discharging opening of the cyclone pan feeding pump have entering for two product heavy-medium cyclones of pressure with described
Material mouth is connected, and the feed back bucket is connected with the material sucking port of the cyclone pan feeding pump, the output end of the branch pipe and the feed back
Bucket connection.
8. cleaning unit according to claim 7 prevent run coal measures system, it is characterised in that the cyclone pan feeding pump
Discharging opening is connected by pan feeding valve with the feeding mouth for having two product heavy-medium cyclones of pressure, and the cyclone pan feeding pump goes out
Material mouth is also connected by self-loopa valve with feed back bucket；
When the detection unit detect it is described there are two product heavy-medium cyclone decompression states of pressure to occur when, control the pan feeding
Valve is closed, and controls the self-loopa valve to open；
When the detection unit detect it is described there are two product heavy-medium cyclone decompression states of pressure to recover when, control the pan feeding
Valve is opened, and controls the self-loopa valve to close.
9. the preventing of cleaning unit according to any one of claim 1~8 runs coal measures system, it is characterised in that the control
Valve include first control magnetic valve and second control magnetic valve, the underflow mouth by described first control magnetic valve with it is described
The input connection of branch pipe disconnects, and the underflow mouth connects on-off by the described second control magnetic valve with the underflow pipe
Open；
When the detection unit detect it is described there are two product heavy-medium cyclone decompression states of pressure to occur when, control described first
Control magnetic valve to open, and control the second control closed electromagnetic valve；
When the detection unit detect it is described there are two product heavy-medium cyclone decompression states of pressure to recover when, control described first
Closed electromagnetic valve is controlled, and controls the second control magnetic valve to open.
10. a kind of cleaning unit, includes two product heavy-medium cyclones of pressure, described to have the bottom for pressing two product heavy-medium cyclones
Stem bar is connected with underflow pipe, it is characterised in that also run coal measures system including preventing as described in any one of claim 1~9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610191067.7A CN105665156B (en) | 2016-03-30 | 2016-03-30 | A kind of cleaning unit prevent run coal measures system and cleaning unit |
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| CN201610191067.7A CN105665156B (en) | 2016-03-30 | 2016-03-30 | A kind of cleaning unit prevent run coal measures system and cleaning unit |
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| Publication Number | Publication Date |
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| CN105665156A CN105665156A (en) | 2016-06-15 |
| CN105665156B true CN105665156B (en) | 2017-10-20 |
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| CN105665156A (en) | 2016-06-15 |
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