CN104483946A - Automatic control system and method for pulverized coal boiler - Google Patents
Automatic control system and method for pulverized coal boiler Download PDFInfo
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- CN104483946A CN104483946A CN201410769874.3A CN201410769874A CN104483946A CN 104483946 A CN104483946 A CN 104483946A CN 201410769874 A CN201410769874 A CN 201410769874A CN 104483946 A CN104483946 A CN 104483946A
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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
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM]
- G05B19/4185—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM] characterised by the network communication
Abstract
The invention provides an automatic control system and method for a pulverized coal boiler, belongs to the technical field of control of pulverized coal boilers, and provides a device and a method capable of automatically controlling the pulverized coal boiler to run. According to the technical scheme, the automatic control system for the pulverized coal boiler comprises a master controller, a local monitor station, a remote monitor station, a video monitor station, an energy management station, a material feeding subsystem, a combustion subsystem, a soot blowing subsystem and a water feeding subsystem; the master controller communicates with the local monitor station, the remote monitor station, the video monitoring station and the energy management station through Ethernet, and the master controller further communicates with the material feeding subsystem, the combustion subsystem, the soot blowing subsystem and the water feeding subsystem through field busses. The system and method are applicable to the field of pulverized coal boilers.
Description
Technical field
Pulverized coal firing boiler automatic control system of the present invention and control method thereof, belong to pulverized coal firing boiler control technology field.
Background technology
It is not standby that pulverized coal firing boiler forms burning by firing chamber (burner hearth), burner and portfire, compare with old-fashioned boiler, coal storage, the storage ash system of pulverized coal firing boiler are all the tower structures automatically run, totally-enclosed, pollution-free, and it is high to have combustion rate, the characteristic that start and stop are simple and energy-efficient, is therefore widely used.But existing steam generator system mostly needs manual site to operate, especially for some large-scale steam generator systems, in the urgent need to building a kind of boiler automatic control system, boiler operatiopn is made to reach the object of Based Intelligent Control.
Summary of the invention
The present invention overcomes the deficiencies in the prior art, and technical matters to be solved is: provide a kind of apparatus and method that automatically can control pulverized coal firing boiler and run.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: invention pulverized coal firing boiler automatic control system, comprising: master controller, local monitor station, remote supervisory station, video surveillance station, energy management station, to blanking subsystem, combustion subsystem, blow grey subsystem and give water subsystem;
Described master controller is by Ethernet and local monitor station, remote supervisory station, video surveillance station is connected with energy management station and carries out communication, described to blanking subsystem, combustion subsystem, blow grey subsystem and feedwater subsystem composition field control layer, above-mentioned master controller is by fieldbus and give blanking subsystem, combustion subsystem, blow grey subsystem to be connected with to water subsystem and to carry out communication, master controller is also by fieldbus and feeder controller, primary air fan controller, overfire air fan controller, induced draft fan controller is connected with water circulation system controller and carries out communication.
Described master controller is PLC.
Described video surveillance station is connected with multiple camera.
The control of described pulverized coal firing boiler automatic control system comprises automatic ignition control, automatically blowing out and controls, suddenly stops to control and auto feed control;
The flow process that described automatic ignition controls is as follows:
The first step: judge whether ignition condition possesses, if possess ignition condition, then enter second step, described ignition condition comprises: whether whether combustion gas/fuel oil possesses, whether boiler water level possesses possesses with coal bunker material level;
Second step: start induced draft fan, induced draft fan start successfully and time delay to after enter the 3rd step; The 9th step is then entered if there is fault;
3rd step: start fan blower, fan blower start successfully and time delay to after enter the 4th step; The 9th step is then entered if there is fault;
4th step: start purging program, purge time to after enter the 5th step; The 9th step is then entered if there is fault;
5th step: igniting, starts combustion gas/grease gun igniting program, if light a fire successfully, then enters the 6th step; The 9th step is then entered if there is fault;
6th step: start primary air fan, primary air fan start successfully and time delay to after enter the 7th step; The 9th step is then entered if there is fault;
7th step: start screw feeder, batcher start successfully and time delay to after enter the 8th step; The 9th step is then entered if there is fault;
8th step: detect fire inspection signal, if light a fire successfully, then show and light a fire successfully; Unsuccessful if lighted a fire, then enter the 9th step;
9th step: igniting stops, and exits ignition procedure;
3rd step of described automatic ignition control flow is in the 8th step, and combustion chamber draft is between ﹣ 200 ~ ﹣ 300Pa.
The flow process that described automatic blowing out controls is as follows:
The first step: receive blowing out signal, start downtime schedule, then enter second step, described blowing out signal comprises: blowing out signal automatically, manual blowing out order and Coordinated Control Signal;
Second step: judge induced draft fan state, if induced draft fan state is normal, then enters the 3rd step, if there is fault, then enters the 8th step;
3rd step: stop batcher, batcher stops and enters the 4th step after time delay 1 ~ 3min, then enters the 8th step if there is fault;
4th step: open induced draft fan, fan blower, delay time, to rear startup sonic soot blowing, enters the 5th step after sonic soot blowing 15s; The 8th step is then entered if there is fault;
5th step: stop overfire air fan, overfire air fan stop and time delay to after enter the 6th step, now combustion chamber draft is between ﹣ 200 ~ ﹣ 300Pa; The 8th step is then entered if there is fault;
6th step: start purging program, purge time to after enter the 7th step, then enter the 8th step if there is fault;
7th step: stop induced draft fan, after induced draft fan stops, display blowing out success, then enters the 8th step if there is fault;
8th step: start and suddenly stop program;
The flow process that described urgency stops controlling is as follows:
The first step: receive emergent stop signal, starts and anxious stops program, then enter second step: described emergent stop signal comprises: automatic emergency stop signal, manually suddenly stop order and Coordinated Control Signal;
Second step: open induced draft fan, if induced draft fan open normal and delay time to after enter the 3rd step; If there is fault, then directly enter the 5th step;
3rd step: stop batcher, primary air fan and fan blower respectively, if above-mentioned arrestment stops normal, then enters the 4th step, if there is fault, then enters the 5th step;
4th step: stop induced draft fan, after induced draft fan stops, display is anxious stops successfully, if there is fault, then enters the 5th step;
5th step: manual handle;
The flow process that described auto feed controls is as follows:
The first step: whether normally judge to lack material alerting signal, if normal, enter second step, if abnormal, then enter the 6th step;
Second step: provide blanking signal, performs blanking action, if blanking action is normal, then enters the 3rd step, if blanking is not operating, then enters the 6th step;
3rd step: judge whether intermediate bin weight reaches the upper limit, if reach the upper limit, then enters the 4th step, if abnormal, then enters the 6th step;
4th step: close blanking signal, stops blanking action, then enters the 5th step, if abnormal, then enters the 6th step;
5th step: judge intermediate bin weight amount, if numerical value is normal, then reinforced stopping, if abnormal, then enters the 6th step;
6th step: send sound and light alarm, shutdown inspection.
The beneficial effect that the present invention compared with prior art has is: the present invention adopts the control model of host computer and PLC, therebetween communication is carried out by Ethernet, field control layer, PLC connects to blanking subsystem by fieldbus, combustion subsystem, blow grey subsystem, to formations such as water subsystems, each subsystem controls each process section respectively as the substation of PLC, Remote WEB client is by Ethernet real time monitoring boiler operating state, based on field data, by real time data and filing data, system energy is managed, practical.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention will be further described in detail:
Fig. 1 is electrical block diagram of the present invention;
Fig. 2 is the process flow diagram that in the present invention, automatic ignition controls;
Fig. 3 is the process flow diagram that in the present invention, automatic blowing out controls;
Fig. 4 is the anxious process flow diagram stopping controlling in the present invention;
Fig. 5 is the process flow diagram that in the present invention, auto feed controls;
In figure: 1 be master controller, 2 be local monitor station, 3 be remote supervisory station, 4 be video surveillance station, 5 be energy management station, 6 for be combustion subsystem to blanking subsystem, 7,8 for blow grey subsystem, 9 for be Ethernet to water subsystem, 10,11 be fieldbus, 12 be feeder controller, 13 be primary air fan controller, 14 be overfire air fan controller, 15 be induced draft fan controller, 16 be water circulation system controller, 17 for camera.
Embodiment
As shown in Figures 1 to 5, pulverized coal firing boiler automatic control system of the present invention, comprising: master controller 1, local monitor station 2, remote supervisory station 3, video surveillance station 4, energy management station 5, to blanking subsystem 6, combustion subsystem 7, blow grey subsystem 8 and give water subsystem 9.
Described master controller 1 is by Ethernet 10 and local monitor station 2, remote supervisory station 3, video surveillance station 4 is connected with energy management station 5 and carries out communication, described to blanking subsystem 6, combustion subsystem 7, blow grey subsystem 8 and form field control layer to water subsystem 9, above-mentioned master controller 1 is by fieldbus 11 and give blanking subsystem 6, combustion subsystem 7, blow grey subsystem 8 to be connected to carry out communication with to water subsystem 9, master controller 1 is also by fieldbus 11 and feeder controller 12, primary air fan controller 13, overfire air fan controller 14, induced draft fan controller 15 is connected with water circulation system controller 16 and carries out communication.
Described master controller 1 is PLC, to ensure that whole system efficiently, is reliably run.Remote distributed I/O stands and adopts discrete type modularized distribution type I/O system, and its degree of protection is IP20, comprises following element: interface module, power module, I/O template and terminal module.
For the convenience of the user to total system monitoring and manual operation etc., use the human interface devices of hommization, can directly be used in machine or working environment, based on the design of Windows CE operating system, there is real-time capacity and short boot time, provide the ideal conditions used under severe industrial environment or near rugged surroundings.Touch-screen has compact structure, even if also can use when space is very little.Carry the configuration software based on panel designs simultaneously.
Switch adopts gigabit ethernet switch, and for reducing network open circuit, switch adopts Redundancy Management RM pattern.When network failure, switch reconstitution time is less than 0.3S, effectively can strengthen reliability.This switch also supported vlans divides, the functions such as snmp management.By SNMP, when network failure, diagnosis and the location of fault can be realized in the very first time.
Described video surveillance station 4 is connected with multiple camera 17.
Native system is as the first floor system of MES system in future, the mark of primary responsibility material and identification, field level equipment networking, the collection of the information such as material, equipment, technological parameter and management, build a data platform, be four aspect services: one, realize monomer and automatically regulate, feed, First air, Secondary Air, air inducing, feed water, blow ash etc.; Two, on the basis of preceding paragraph functional realiey, will to blanking subsystem, combustion subsystem, blow grey subsystem, realize automatically to water subsystem etc.; Three, add function that is chain and diagnosis control, improve the security of system cloud gray model; Four, upper monitoring aspect, adds local monitor, remote monitoring, energy management.
In the present invention, coal dust is from middle powder storehouse through batcher, enters mixer, in specific procedure operating process: click batcher picture, ejects control panel for motor.Control content: start, cease and desist order, the given window 0-100%(0-50HZ of frequency), reset button (when there is Watchdog, needing reset command); Status feedback signal: run indicator is (green-to run, grey-stopping), malfunction indicator lamp (redness-fault, grey-normal), current feedback values (unit A), frequency feedback value (unit %, same frequency is given), house dog pilot lamp (yellow Watchdog-time-out is reported to the police, lamp disappearance-normal), status lamp (green-to run, grey-stopping).
Feed motor regulates panel to be connected with motor by white point setting-out, left button is clicked, eject control panel, (manual-is manual to select control model by combobox, automatic-is automatic), during M manual mode, directly control at batcher control panel, during A automatic mode, panel is regulated automatically to regulate by feed motor; U-boiler load, V-feeding coal, the corresponding ten pairs of coordinates of (U1, V1)-(U10, V10), form nine broken line curves after connecting, boiler load and feeding coal are along curvilinear motion.
The chain panel of batcher, control flow interface is clicked " beginning " or " stopping " (chain input display " beginning ", chain releasing display " stopping "), show chain control panel, information displaying: surplus-condition of the red end does not meet, yellow word-condition does not meet and removes chain at the red end, and ash end surplus-condition meets; Condition conditional outcome pilot lamp, green-condition meets, and grey-condition does not meet; Trip conditional outcome pilot lamp, green-condition meets, and grey-condition does not meet; Check box, beats hook-chain input, does not play hook-chain releasing.
Overfire air fan regulates according to feeding coal and flue gas oxygen content, and the part of carrying out proportion adjustment according to feeding coal is identical with batcher adjustment process, identical with induced draft fan PID adjustment process according to the part that oxygen content regulates.Left button is clicked " induced draft fan feedback " panel, ejection induced draft fan PID control inerface, control model selection: manually-Manual, automatically-Automatic; Regulative mode is selected: inside-Internal, outside-External; Optimum configurations: SP-inner setting value setting window, PV-process values value of feedback, Manual-induced draft fan frequency manually sets, FB-induced draft fan frequency feedback, P-PID scale parameter, I-PID integral parameter, D-PID differential parameter.
Automatic ignition optimum configurations is as follows: blower fan, batcher frequency etc. are in control panel for motor setting, and the parameters such as time delay input in time setting district, automatic ignition control command: first click automatically, then click button ignition switch.
Normal blowing out optimum configurations: blower fan, batcher frequency setting, blowing out delay time sets, and then click " stopping " button, boiler enters normal blowing out flow process.After blowing out, enter control panel for motor, check motor order, motor condition feedback one by one, determine all to be in halted state, again click " stopping " button, boiler stops completely.
Suddenly stop order, blowing out under the emergency circumstance, priority, higher than normal blowing out, after blowing out, is again clicked " suddenly stopping " order, and is clicked the Reset command, remove anxious stopping.
The control of described pulverized coal firing boiler automatic control system comprises automatic ignition control, automatically blowing out and controls, suddenly stops to control and auto feed control;
The flow process that described automatic ignition controls is as follows:
The first step: judge whether ignition condition possesses, if possess ignition condition, then enter second step, described ignition condition comprises: whether whether combustion gas/fuel oil possesses, whether boiler water level possesses possesses with coal bunker material level;
Second step: start induced draft fan, induced draft fan start successfully and time delay to after enter the 3rd step; The 9th step is then entered if there is fault;
3rd step: start fan blower, fan blower start successfully and time delay to after enter the 4th step; The 9th step is then entered if there is fault;
4th step: start purging program, purge time to after enter the 5th step; The 9th step is then entered if there is fault;
5th step: igniting, starts combustion gas/grease gun igniting program, if light a fire successfully, then enters the 6th step; The 9th step is then entered if there is fault;
6th step: start primary air fan, primary air fan start successfully and time delay to after enter the 7th step; The 9th step is then entered if there is fault;
7th step: start screw feeder, batcher start successfully and time delay to after enter the 8th step; The 9th step is then entered if there is fault;
8th step: detect fire inspection signal, if light a fire successfully, then show and light a fire successfully; Unsuccessful if lighted a fire, then enter the 9th step;
9th step: igniting stops, and exits ignition procedure;
3rd step of described automatic ignition control flow is in the 8th step, and combustion chamber draft is between ﹣ 200 ~ ﹣ 300Pa.
The flow process that described automatic blowing out controls is as follows:
The first step: receive blowing out signal, start downtime schedule, then enter second step, described blowing out signal comprises: blowing out signal automatically, manual blowing out order and Coordinated Control Signal;
Second step: judge induced draft fan state, if induced draft fan state is normal, then enters the 3rd step, if there is fault, then enters the 8th step;
3rd step: stop batcher, batcher stops and enters the 4th step after time delay 1 ~ 3min, then enters the 8th step if there is fault;
4th step: open induced draft fan, fan blower, delay time, to rear startup sonic soot blowing, enters the 5th step after sonic soot blowing 15s; The 8th step is then entered if there is fault;
5th step: stop overfire air fan, overfire air fan stop and time delay to after enter the 6th step, now combustion chamber draft is between ﹣ 200 ~ ﹣ 300Pa; The 8th step is then entered if there is fault;
6th step: start purging program, purge time to after enter the 7th step, then enter the 8th step if there is fault;
7th step: stop induced draft fan, after induced draft fan stops, display blowing out success, then enters the 8th step if there is fault;
8th step: start and suddenly stop program.
The flow process that described urgency stops controlling is as follows:
The first step: receive emergent stop signal, starts and anxious stops program, then enter second step: described emergent stop signal comprises: automatic emergency stop signal, manually suddenly stop order and Coordinated Control Signal;
Second step: open induced draft fan, if induced draft fan open normal and delay time to after enter the 3rd step; If there is fault, then directly enter the 5th step;
3rd step: stop batcher, primary air fan and fan blower respectively, if above-mentioned arrestment stops normal, then enters the 4th step, if there is fault, then enters the 5th step;
4th step: stop induced draft fan, after induced draft fan stops, display is anxious stops successfully, if there is fault, then enters the 5th step;
5th step: manual handle.
The flow process that described auto feed controls is as follows:
The first step: whether normally judge to lack material alerting signal, if normal, enter second step, if abnormal, then enter the 6th step;
Second step: provide blanking signal, performs blanking action, if blanking action is normal, then enters the 3rd step, if blanking is not operating, then enters the 6th step;
3rd step: judge whether intermediate bin weight reaches the upper limit, if reach the upper limit, then enters the 4th step, if abnormal, then enters the 6th step;
4th step: close blanking signal, stops blanking action, then enters the 5th step, if abnormal, then enters the 6th step;
5th step: judge intermediate bin weight amount, if numerical value is normal, then reinforced stopping, if abnormal, then enters the 6th step;
6th step: send sound and light alarm, shutdown inspection.
The present invention adopts the control model of host computer and PLC, therebetween communication is carried out by Ethernet, field control layer, PLC is connected to blanking subsystem, combustion subsystem by fieldbus, is blown grey subsystem, to formations such as water subsystems, each subsystem controls each process section respectively as the substation of PLC, Remote WEB client is by Ethernet real time monitoring boiler operating state, based on field data, by real time data and filing data, system energy is managed, practical.
Claims (5)
1. pulverized coal firing boiler automatic control system, is characterized in that: comprising: master controller (1), local monitor station (2), remote supervisory station (3), video surveillance station (4), energy management station (5), to blanking subsystem (6), combustion subsystem (7), blow grey subsystem (8) and give water subsystem (9);
Described master controller (1) is by Ethernet (10) and local monitor station (2), remote supervisory station (3), video surveillance station (4) is connected with energy management station (5) and carries out communication, described to blanking subsystem (6), combustion subsystem (7), blow grey subsystem (8) and form field control layer to water subsystem (9), above-mentioned master controller (1) is by fieldbus (11) and give blanking subsystem (6), combustion subsystem (7), blow grey subsystem (8) to be connected to carry out communication with to water subsystem (9), master controller (1) is also by fieldbus (11) and feeder controller (12), primary air fan controller (13), overfire air fan controller (14), induced draft fan controller (15) is connected with water circulation system controller (16) and carries out communication.
2. pulverized coal firing boiler automatic control system according to claim 1, is characterized in that: described master controller (1) is PLC.
3. pulverized coal firing boiler automatic control system according to claim 1 and 2, is characterized in that: described video surveillance station (4) is connected with multiple camera (17).
4. a control method for pulverized coal firing boiler automatic control system as claimed in claim 1, is characterized in that: the control of described pulverized coal firing boiler automatic control system comprises automatic ignition control, automatically blowing out and controls, suddenly stops to control and auto feed control;
The flow process that described automatic ignition controls is as follows:
The first step: judge whether ignition condition possesses, if possess ignition condition, then enter second step, described ignition condition comprises: whether whether combustion gas/fuel oil possesses, whether boiler water level possesses possesses with coal bunker material level;
Second step: start induced draft fan, induced draft fan start successfully and time delay to after enter the 3rd step; The 9th step is then entered if there is fault;
3rd step: start fan blower, fan blower start successfully and time delay to after enter the 4th step; The 9th step is then entered if there is fault;
4th step: start purging program, purge time to after enter the 5th step; The 9th step is then entered if there is fault;
5th step: igniting, starts combustion gas/grease gun igniting program, if light a fire successfully, then enters the 6th step; The 9th step is then entered if there is fault;
6th step: start primary air fan, primary air fan start successfully and time delay to after enter the 7th step; The 9th step is then entered if there is fault;
7th step: start screw feeder, batcher start successfully and time delay to after enter the 8th step; The 9th step is then entered if there is fault;
8th step: detect fire inspection signal, if light a fire successfully, then show and light a fire successfully; Unsuccessful if lighted a fire, then enter the 9th step;
9th step: igniting stops, and exits ignition procedure;
The flow process that described automatic blowing out controls is as follows:
The first step: receive blowing out signal, start downtime schedule, then enter second step, described blowing out signal comprises: blowing out signal automatically, manual blowing out order and Coordinated Control Signal;
Second step: judge induced draft fan state, if induced draft fan state is normal, then enters the 3rd step, if there is fault, then enters the 8th step;
3rd step: stop batcher, batcher stops and enters the 4th step after time delay 1 ~ 3min, then enters the 8th step if there is fault;
4th step: open induced draft fan, fan blower, delay time, to rear startup sonic soot blowing, enters the 5th step after sonic soot blowing 15s; The 8th step is then entered if there is fault;
5th step: stop overfire air fan, overfire air fan stop and time delay to after enter the 6th step, now combustion chamber draft is between ﹣ 200 ~ ﹣ 300Pa; The 8th step is then entered if there is fault;
6th step: start purging program, purge time to after enter the 7th step, then enter the 8th step if there is fault;
7th step: stop induced draft fan, after induced draft fan stops, display blowing out success, then enters the 8th step if there is fault;
8th step: start and suddenly stop program;
The flow process that described urgency stops controlling is as follows:
The first step: receive emergent stop signal, starts and anxious stops program, then enter second step: described emergent stop signal comprises: automatic emergency stop signal, manually suddenly stop order and Coordinated Control Signal;
Second step: open induced draft fan, if induced draft fan open normal and delay time to after enter the 3rd step; If there is fault, then directly enter the 5th step;
3rd step: stop batcher, primary air fan and fan blower respectively, if above-mentioned arrestment stops normal, then enters the 4th step, if there is fault, then enters the 5th step;
4th step: stop induced draft fan, after induced draft fan stops, display is anxious stops successfully, if there is fault, then enters the 5th step;
5th step: manual handle;
The flow process that described auto feed controls is as follows:
The first step: whether normally judge to lack material alerting signal, if normal, enter second step, if abnormal, then enter the 6th step;
Second step: provide blanking signal, performs blanking action, if blanking action is normal, then enters the 3rd step, if blanking is not operating, then enters the 6th step;
3rd step: judge whether intermediate bin weight reaches the upper limit, if reach the upper limit, then enters the 4th step, if abnormal, then enters the 6th step;
4th step: close blanking signal, stops blanking action, then enters the 5th step, if abnormal, then enters the 6th step;
5th step: judge intermediate bin weight amount, if numerical value is normal, then reinforced stopping, if abnormal, then enters the 6th step;
6th step: send sound and light alarm, shutdown inspection.
5. the control method of pulverized coal firing boiler automatic control system according to claim 4, is characterized in that: the 3rd step of described automatic ignition control flow is in the 8th step, and combustion chamber draft is between ﹣ 200 ~ ﹣ 300Pa.
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| CN108829063A (en) * | 2018-07-02 | 2018-11-16 | 深圳市佳运通电子有限公司 | Heating furnace Integrity Management centralized control equipment |
| CN113654024A (en) * | 2021-08-24 | 2021-11-16 | 北京天衡智联科技有限公司 | Steam boiler pipeline pressure coordinated control system |
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