CN107783476A - A kind of composite dry coal dressing Process Control System - Google Patents
A kind of composite dry coal dressing Process Control System Download PDFInfo
- Publication number
- CN107783476A CN107783476A CN201610714208.9A CN201610714208A CN107783476A CN 107783476 A CN107783476 A CN 107783476A CN 201610714208 A CN201610714208 A CN 201610714208A CN 107783476 A CN107783476 A CN 107783476A
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- China
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- control system
- process control
- dry coal
- dressing process
- coal dressing
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
- G05B2219/1161—Signal processing, detect or deliver analog signals
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
For the process control of combined type dry coal separation system, it have developed composite dry coal dressing Process Control System, system is using PLC and IFIX configuration softwares as core, Rational choice control point, with reference to PID control technology and PLC programming techniques design relative program, collection, processing and the autostable regulation and control of technological parameter of data are completed, the real-time monitoring of coal separation flow is realized, improves the automaticity of coal preparation technique.
Description
Art
The present invention relates to a kind of control system, more particularly to a kind of composite dry coal dressing Process Control System.
Background technology
Coal preparation method mainly has dry coal preparation and wet coal preparation.The progress such as water, suspension is referred to as wet in a liquid
Method coal separation, what is carried out in atmosphere is referred to as dry coal preparation.Coal industry mode more prevailing is wet coal preparation at present, but at me
State but encounters the obstacle of following 3 aspects：1. the abundant west area water resource wretched insufficiency of coal reserves, and in the winter time
Easy freezing under severe cold weather；2. partly belong to low-disintegration coal kind and easy argillization coal, it is difficult to wet method come coal separation；3. wet coal preparation work
Skill investment is higher, and some coal preparation plant's insufficient funds are difficult to use.By contrast, dry coal preparation has small investment, takes up an area the small, cycle
The advantages that short, efficiency high, small labour's fund input.Based on this, the clean utilization of coal is realized, dry coal preparation is as China
Research emphasis and direction.One kind that combined type dry coal separation technology provides a coal processing and utilization for western China is new
Approach, but matched control system is relatively fewer.
The coal grain of combined type dry coal separation system delivers to batcher by surge bunker, and this flow can make thickness of bed layer equal
It is even.Opening vibrating motor makes dry separation bed produce vibration, has air holes above bed, there is air compartment below, plays the work of regulation air quantity
With air-flow is acted on sorting coal grain by air holes, is carried out air blast by ventilation blower, is then layered by density size.Dry separation
Bed Oscillation Amplitude and vertically and horizontally inclination angle can be arbitrarily configured as needed.Air-flow is by the overwhelming majority after dry separation bed through rotation
Wind deduster Posterior circle uses, and small part is discharged into air after sack cleaner.
The content of the invention
The purpose of the present invention is to improve the operating efficiency of dry coal preparation, realizing automatically controlling for coal separation flow, devise
A kind of composite dry coal dressing Process Control System.
The technical solution adopted for the present invention to solve the technical problems is.
Composite dry coal dressing Process Control System by upper control machine, higher level's control system, output module, detection module,
The part such as executing agency, power supply forms.
Cores of the described PLC as control system, its input module receive the data that various detecting element collections come, will
It carries out being converted to standard signal, and this signal then is delivered into upper industrial computer, carries out integrated treatment judgement, produces control letter
Number, drive actuator to act by output module.
Described host computer carries out data exchange using OPC technology and higher level's control system, realizes remote control.
Described system is measured using the type radar levelmeters of JERD 818 to surge bunker thing position, and the level meter can be
Worked in the environment of high dust, utilize impulse ejection and the time difference received the original directly proportional to the distance on measured medium surface
Reason, the thing position of surge bunker is measured, working stability, measurement is accurately..
SX41100 type servo high-precise uniaxial dipmeters are selected in the monitoring at the dry separation bed of described system vertically and horizontally inclination angle,
Have the advantages that small error, vibration resistance and operating temperature range are wide.
The monitoring of the dry separation bed vibration displacement of described system uses YTKJ-21 types velocity sensor and SLM-8000 types
Vibration displacement transmitter.
The air quantity of described system is measured using the device of orifice flowmeter and the supporting composition of differential pressure conveyer.Lotus
Sensor is retransmitted using the bright ICS-20 type electron transport belt scales in way, by crane span structure of weighing, weighing sensor, 60-12C type velocity pick-ups
Device, the part of 2105 type weighing controller 4 composition.
Described Systematic selection ZAJD type motorized adjustments butterfly valve control air quantity, the valve sealing is good, and discharge characteristic is approximate
Straight line.
Described System selection criteria frequency converter carries out gearshift adjustment to each motor, rapid and convenient, safe and reliable.System
Voltage, electric current, power and the power factor signal collection and measurement of each motor, are surveyed using EDA9033 series comprehensives electricity
Module is measured to realize.
2 pieces of Analog input mModule, 2 pieces of analog output module, quantity are selected in the PLC hardware selections of described system
1 piece of input module, 2 pieces of digital output module, 1 piece of CPU modules, 1 piece of power module.
Described system takes power supply arranged apart with signal wire to improve the anti-interference of system, each sensor
Output signal uses direct current signal, PLC and frequency converter using measures such as uninterrupted power sources.
Described system controls the thing position of surge bunker in surge bunker below 75%, too high to prevent coal position, causes to overflow.Cross
High coal position also has larger pressure to act on to buffering low regulation door, causes its damage.
Master variable is the feeding coal of batcher in described system, and secondary variable passes to the coal grain of batcher for regulation door
Amount, master controller is master selector, and regulation door controller is secondary controller.Using Cascade Control Plan.
The beneficial effects of the invention are as follows.
Composite dry coal dressing Process Control System combination PID control technology and PLC programming techniques design relative program, are completed
Collection, processing and the autostable regulation and control of technological parameter of data, realize the real-time monitoring of coal separation flow, improve coal separation
The automaticity of technique.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is Control system architecture signal.
Fig. 2 is combined type dry coal separation system process.
Fig. 3 is surge bunker thing position control program.
Fig. 4 is the instrument circuit of surge bunker.
Fig. 5 is Cascade Control Plan.
Fig. 6 is the Oscillation Amplitude control program of dry separation bed 5.
Fig. 7 is the cross dip control program of dry separation bed 5.
Fig. 8 is 6 sections of Boiler pressure control schemes of cleaned coal.
Wherein, 1- enters coal separation, 2- surge bunkers, 3- regulation doors, 4- batchers, 5- dry separation beds, 6- cleaned coal, coal in 7-, 8- cash
Stone, 9- vibrating motors, 10- sack cleaners, 11- air-introduced machines, 12- air drafts, 13- cyclone dust collectors, 14- centrifugal fans.
Embodiment
As shown in figure 1, composite dry coal dressing Process Control System by upper control machine, higher level's control system, output module,
The part such as detection module, executing agency, power supply forms.System is mainly the part capital equipment to combined type dry coal separation technique
Automatically controlled.Target is reached according to works scope and system requirements, the system is mainly responsible for the following equipment of monitoring：Surge bunker
2nd, 8 sections of dry separation bed 5,6 sections of cleaned coal, 7 sections of middle coal and spoil air-valves.Whole system is mainly passed by PLC monitoring cabinets, frequency converter, loading
The equipment compositions such as sensor, differential pressure transmitter, monitoring computer, netting twine and uninterrupted power source.Cores of the PLC as control system,
Its input module receives the data that various detecting element collections come, and is carried out being converted to standard signal, then gives this signal
To upper industrial computer, integrated treatment judgement is carried out, produces control signal, drives actuator to act by output module.Host computer
Data exchange is carried out using OPC technology and higher level's control system, realizes remote control.
Control requirement based on said system, is measured using the type radar levelmeters of JERD 818 to the thing position of surge bunker 2,
The level meter can work in the environment of high dust, using impulse ejection and the time difference and the measured medium surface that receive away from
From directly proportional principle, the thing position of surge bunker 2 is measured, working stability, measurement is accurately.Dry separation bed 5 vertically and horizontally inclination angle monitoring choosing
With SX41100 type servo high-precise uniaxial dipmeters, have the advantages that small error, vibration resistance and operating temperature range are wide.Dry separation
The monitoring of 5 vibration displacements of bed uses YTKJ-21 types velocity sensor and SLM-8000 type vibration displacement transmitters.Air quantity uses
The device of orifice flowmeter and the supporting composition of differential pressure conveyer measures.Load sensor is using the bright ICS-20 types electricity in way
Son conveying belt scale, by crane span structure of weighing, weighing sensor, 60-12C types velocity sensor, the part group of 2105 type weighing controller 4
Into.ZAJD type motorized adjustments butterfly valve control air quantity is selected, the valve sealing is good, discharge characteristic near linear.Selection standard becomes
Frequency device carries out gearshift adjustment to each motor, rapid and convenient, safe and reliable.The voltage of each motor of system, electric current, power and
Power factor signal gathers and measurement, is realized using EDA9033 series comprehensive electrical measurement modules.In PLC hardware selections
Select 2 pieces of Analog input mModule, 2 pieces of analog output module, 1 piece of quantity input module, 2 pieces of digital output module, CPU
1 piece of module, 1 piece of power module.In order to improve the anti-interference of system, take power supply arranged apart with signal wire, each sensor
Output signal use direct current signal, PLC and frequency converter are using measures such as uninterrupted power sources.
As shown in Fig. 2 the coal grain of combined type dry coal separation system delivers to batcher 4 by surge bunker 2, this flow can make
Thickness of bed layer is uniform.Opening vibrating motor 9 makes 5 layers of dry separation bed produce vibration, has air holes above bed, there is air compartment below, rises
The effect of air quantity is adjusted, air-flow is acted on sorting coal grain by air holes, carries out air blast by ventilation blower, then enter by density size
Row layering.The Oscillation Amplitude of dry separation bed 5 and vertically and horizontally inclination angle can be arbitrarily configured as needed.Air-flow passes through dry separation bed 5
The overwhelming majority uses through the Posterior circle of cyclone dust collectors 13 afterwards, and small part is discharged into air after sack cleaner 10.
The system chooses different equipment as control point, takes procedure below control program from technological process：
(1) before system start stop system starts, first total air door is closed, each air compartment air door is opened.Air-introduced machine 11 is first opened, then is opened
Sack cleaner 10, main air blower is then opened, then open main air door.Coal grain is opened batcher 4 after entering surge bunker 2, done successively
Select the vibrating motor 9 of bed 5 and raw coal ribbon conveyer etc..(2) control of the thing position of surge bunker 2 and instrument circuit are by surge bunker 2
Thing position is controlled in surge bunker below 2 75%, too high to prevent coal position, causes to overflow.Too high coal position is to buffering low regulation door 3
There is larger pressure effect, cause its damage.
As shown in Figure 3,4, the thing position control program of surge bunker 2, when the thing position in surge bunker 2 is reduced to because coal grain addition is small
During lower limit, Radar Measurement Instrument detects that thing position declines, and level controller will be acted on frequency converter, frequency converter regulation power supply frequency
Rate makes its rise, and so that motor speed increases, the coal grain addition in surge bunker 2 increases (typically between 35~50Hz)
Greatly；Conversely, when the thing position of surge bunker 2 rises to higher limit, frequency converter regulation power supply frequency make its reduce (typically 35~
Between 50Hz) so that motor speed reduces, the coal grain addition in surge bunker 2 accordingly reduces, and is unlikely to overflow surge bunker
2。
The serials control of feeding coal after the feeding coal of batcher 4 as shown in Figure 5 and regulation door 3, in the system master variable be to
The feeding coal of material machine 4, secondary variable pass to the coal grain amount of batcher 4 for regulation door 3, and master controller is master selector, adjusts door 3
Controller is secondary controller.Using Cascade Control Plan.
The Oscillation Amplitude control of dry separation bed 5 as shown in Figure 6, according to the grading principle of dry separation bed 5, the amplitude of dry separation bed 5 is also
The amount controlled is needed, using simple negative-feedback closed-loop path, is adjusted with frequency converter.
Dry separation bed 5 as shown in Figure 7 vertically and horizontally pitch angle control, the cross dip of dry separation bed 5 are mainly used to adjust the powder of cleaned coal 6 defeated
Band and treating capacity are sent, using simple negative-feedback closed-loop path, is adjusted with stepping motor.
8 sections of 6 sections of cleaned coal, 7 sections of middle coal, spoil Boiler pressure controls as shown in Figure 8, using simple negative-feedback closed-loop path, use
Butterfly valve is adjusted.
The control program of each equipment seems isolated, but from the point of view of technological process, they are all mutually related, existing suitable
Sequence, there is concurrency again.Succession is got by the start and stop order of system equipment, and this can also embody in PLC program design,
The control program of the feeding coal of batcher 4 has the locking of the control program of surge bunker 2 before starting, only carried out the thing of surge bunker 2
After position control determines that the addition of coal grain is qualified, then the feeding control of batcher 4 is carried out, the control program of remaining equipment is with closing
Lock similar.Concurrency is embodied in the progress of actual process coal preparation flowsheet, after according to start and stop order all devices, some equipment
Such as the thing position of surge bunker 2 is too high, the PID for both having had its own is adjusted, the corresponding addition for reducing supply frequency and subtracting buckwheat coal, by
Being adjusted in PID needs the regular hour, also has other relevant devices such as feeding coal increase or the air quantity increase of batcher 4
Adjust to meet to require, the amplitude size of adjustment depends on speed and precision that PID is adjusted.
The system writes control program using trapezoid figure language, in major cycle tissue block OB1, calls FC11 function control
The start and stop of system processed, it is the start and stop of ribbon conveyer, batcher 4, the motor of dry separation bed 5 respectively.Ribbon conveyer is provided with one
The detection means (travel switch) of belt deflection is prevented, when sideslip, then ribbon conveyer will be stopped, and remaining sets
It is standby also by whole parkings, until failure solves, untill restarting.Such as surge bunker 2 Off-tracking Problem of Belt-type Conveyer Belting when,
The then equal sequence stop such as batcher 4, the blower fan of dry separation bed 5 and deduster.OB35 cycle interruption tissue blocks have invoked FC1 to FC9 nine
Individual function, this nine function algorithms use pid control algorithm, call STEP7 standard feature block SFB41 to realize.Program is compiled
Translate the middle addition function such as locking, while the operating mode that transfinites using interrupt processing function to the thing position of dry separation system, Oscillation Amplitude etc.
Interruption priority treatment is carried out, so as to realize automatically controlling in control program.
Host computer interface completes the design programming of host computer monitoring software using IFIX4.5.Data label is initially set up, often
The corresponding driver collection label point of individual data label, IFIX are adopted by poll collection site data, label data, driver
Collection label point etc. realizes the upload of data.The data deposit database collected, realizes the collection of production process information data,
It can be easier to produce Simulation Interface using host computer.The system shares homepage, control centre, history curve, alarms, logins
Nullify and 6 pages of form.The detection limit of several major control variables and whole technological process, start-stop button are shown on homepage
Control the start and stop of each critical piece.History curve interface can call historical data base, show the trend curve of each variable, lead to
The analysis to historical text is crossed, the accident that the function situation of production equipment and forecasting system may occur can be evaluated.Step on
Enter to nullify and log in management available for different operation authority personnel, to ensure that Each performs its own functions, the division of labor is clear and definite.
Data remote transmission realizes that control subsystem and higher level control system by OPC communication protocols using EPA
The data exchange and data remote of system.Go out to access the client journey of the OPC interface of opc server by VB6.0 platform developments
Sequence, OPC communication protocols use Client/Server.The system using control main frame service node as opc server,
IFIX long-range iClient so can directly access opc server by OPC host-host protocols, build as OPC client
The data for erecting the hardware devices such as the PLC, industrial control network and data acquisition module with industrial site are connected.
Claims (10)
- A kind of 1. composite dry coal dressing Process Control System, by upper control machine, higher level's control system, output module, detection mould The part such as block, executing agency, power supply forms.
- 2. composite dry coal dressing Process Control System according to claim 1, it is characterized in that described PLC is as control The core of system, its input module receive the data that various detecting element collections come, are carried out being converted to standard signal, then will This signal delivers to upper industrial computer, carries out integrated treatment judgement, produces control signal, drives actuator to move by output module Make.
- 3. composite dry coal dressing Process Control System according to claim 1, it is characterized in that described host computer uses OPC Technology carries out data exchange with higher level's control system, realizes remote control.
- 4. composite dry coal dressing Process Control System according to claim 1, it is characterized in that described system uses JERD 818 type radar levelmeters measure to surge bunker thing position, and the level meter can work in the environment of high dust, utilize pulse Transmitting and the time difference principle directly proportional to the distance on measured medium surface received, measure the thing position of surge bunker, working stability, Measurement is accurate.
- 5. composite dry coal dressing Process Control System according to claim 1, it is characterized in that the dry separation bed of described system Vertically and horizontally SX41100 type servo high-precise uniaxial dipmeters are selected in the monitoring at inclination angle, have small error, vibration resistance and work temperature Spend the advantages that scope is wide.
- 6. composite dry coal dressing Process Control System according to claim 1, it is characterized in that the dry separation bed of described system The monitoring of vibration displacement uses YTKJ-21 types velocity sensor and SLM-8000 type vibration displacement transmitters.
- 7. composite dry coal dressing Process Control System according to claim 1, it is characterized in that the air quantity of described system is adopted Measured with the device of orifice flowmeter and the supporting composition of differential pressure conveyer；Load sensor is using the bright ICS-20 types in way Electron transport belt scale, by crane span structure of weighing, weighing sensor, 60-12C types velocity sensor, the part group of 2105 type weighing controller 4 Into.
- 8. composite dry coal dressing Process Control System according to claim 1, it is characterized in that described Systematic selection ZAJD Type motorized adjustment butterfly valve controls air quantity, and the valve sealing is good, discharge characteristic near linear.
- 9. composite dry coal dressing Process Control System according to claim 1, it is characterized in that described System selection criteria Frequency converter carries out gearshift adjustment to each motor, rapid and convenient, safe and reliable；Voltage, electric current, the power of each motor of system And power factor signal collection and measurement, realized using EDA9033 series comprehensive electrical measurement modules.
- 10. composite dry coal dressing Process Control System according to claim 1, it is characterized in that the PLC of described system is hard 2 pieces of Analog input mModule, 2 pieces of analog output module, 1 piece of quantity input module, digital output mould are selected in part type selecting 2 pieces of block, 1 piece of CPU modules, 1 piece of power module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610714208.9A CN107783476A (en) | 2016-08-24 | 2016-08-24 | A kind of composite dry coal dressing Process Control System |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610714208.9A CN107783476A (en) | 2016-08-24 | 2016-08-24 | A kind of composite dry coal dressing Process Control System |
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| CN107783476A true CN107783476A (en) | 2018-03-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111617877A (en) * | 2020-05-18 | 2020-09-04 | 中国矿业大学 | Intelligent control system and method for combined type dry method separator |
-
2016
- 2016-08-24 CN CN201610714208.9A patent/CN107783476A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111617877A (en) * | 2020-05-18 | 2020-09-04 | 中国矿业大学 | Intelligent control system and method for combined type dry method separator |
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Application publication date: 20180309 |