CN204166354U - For the automatic control system of middle-size and small-size coal dust industrial hot water boiler - Google Patents
For the automatic control system of middle-size and small-size coal dust industrial hot water boiler Download PDFInfo
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- CN204166354U CN204166354U CN201420483309.6U CN201420483309U CN204166354U CN 204166354 U CN204166354 U CN 204166354U CN 201420483309 U CN201420483309 U CN 201420483309U CN 204166354 U CN204166354 U CN 204166354U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model relates to a kind of automatic control system for middle-size and small-size coal dust industrial hot water boiler, comprise combustion managing system and control system, described combustion managing system is made up of energy management station and remote supervisory station, and energy management station is connected by Industrial Ethernet with remote supervisory station; Described control system comprises master controller, central control unit, field instrumentation and actuator, local monitor station, video station, video camera, master controller connects central control unit by Industrial Ethernet, the output terminal of field instrumentation is connected with the load module of central control unit by signal cable, the input end of actuator is connected with the output module of central control unit by signal cable, video camera is connected with video station by signal cable, and video station, master controller are connected with local monitor station by Industrial Ethernet with central control unit.The utility model can by realizing a key igniting, blowing out automatically, realize feedwater, blow grey automatic control to powder, burning, dedusting, by Combustion System unit, continue to optimize burning, achieve energy-saving and environmental protection, efficient burning, ensure that boiler normally runs in unattended situation.
Description
Technical field
The utility model relates to a kind of automatic control system, is specifically related to a kind of automatic control system for middle-size and small-size coal dust industrial hot water boiler.
Background technology
The quality of control system performance is one of key factor affecting boiler efficiency.The middle and later periods eighties, along with the introducing of external Advanced Control Techniques, the computer controlled system of China's boiler obtains very large development.The nineties, though the Automated condtrol of boiler has become a popular domain, control technology is single, and the modeling of control algolithm can not reflect the problem of true boiler situation.The automatic control technology experience of foreign advanced person in recent years, many enterprises have employed the process control technologies such as DCS system, though broken away from the backward means relying on manpower to monitor before panel board, operate in the past, but automatic control means are still more single, control accuracy is not high yet, this just causes industrial boilers in China inconvenient operation, and operational monitoring, the seriously delayed problem of regulation and control, also cause high energy consumption and serious Environmental Pollution indirectly.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of automatic control system for middle-size and small-size coal dust industrial hot water boiler, a key igniting, blowing out automatically can be realized, realize feedwater, blow grey automatic control to powder, burning, dedusting, by Combustion System unit, continue to optimize burning, achieve energy-saving and environmental protection, efficient burning, ensure that boiler normally runs in unattended situation.
The technical solution of the utility model: a kind of automatic control system for middle-size and small-size coal dust industrial hot water boiler, comprise combustion managing system and control system, described combustion managing system is made up of energy management station and remote supervisory station, and energy management station is connected by Industrial Ethernet with remote supervisory station, described control system comprises master controller, central control unit, field instrumentation, actuator, local monitor station, video station, video camera, described central control unit comprises to blanking subsystem, combustion subsystem, blow grey subsystem, to water subsystem, master controller connects to blanking subsystem by Industrial Ethernet, combustion subsystem, blow grey subsystem, to water subsystem, described field instrumentation comprises intelligent display meter, sensor and transmitter, intelligent display meter, sensor, the output terminal of transmitter is connected with the load module of central control unit by signal cable, the input end of actuator is connected with the output module of central control unit by signal cable, video camera is connected with video station by signal cable, video station, master controller is connected with local monitor station by Industrial Ethernet with central control unit.
Described central control unit, by the running status of input, output signal module monitors boiler, controls on-the-spot actuator.
Described energy management station, remote supervisory station access local monitor station by TCP/IP.
Described master controller is by the signal of signal cable collection site transmitter, sensor and intelligent display meter, and described signal comprises thermal resistance signal, thermocouple signal, current signal, on-off model.
Described actuator comprises valve, motor, water pump, frequency converter.
Described master controller is PLC Programmable Logic Controller.
The utility model compared with prior art has following beneficial effect: 1, the present invention completes boiler safety interlock protection, boiler main fuel trip (MFT), hearth safety monitoring (FSSS); ensure the safe operation of boiler; realize a key igniting, blowing out automatically; realize feedwater, blow grey automatic control to powder, burning, dedusting; by Combustion System unit; continue to optimize burning, achieve energy-saving and environmental protection, efficient burning, ensure that boiler normally runs in unattended situation.
2, Combustion System unit is integrated with MFT and FSSS function, by burning self-regulation model, continues to optimize combustion conditions, when boiler failure is reported to the police, triggers blowing out, urgent blowing out, thus protect boiler by MFT, FSSS.
3, controlled by automatic ignition in access control program, energy realization order hold function, carries out sequential control to induced draft fan, fan blower, primary air fan, batcher, by IGNITION CONTROL, achieves and carries out " a key igniting " boiler on monitoring interface.Also control by (on the spot case) on the spot, local (regulator cubicle), long-range (Central Control Room) three kinds of modes, realize boiler manually, switching undisturbed automatically, switch simple, handling safety, convenience.
4, in combustion Load Regulation is carried out to boiler, by research boiler implosion technique, develop feedwater, feed, to the automatic adjustment model of wind, achieve and automatically regulate according to boiler load.
5, on local monitor station, boiler operatiopn operating mode can be monitored in real time, by the display real time data such as data display, trend curve, histogram, form and filing data, to realize that whole system is directly perceived, shirtsleeve operation and safety, stable operation.
6, mobile phone or computer are by logging in the Internet, adopt WEB mode Telnet the machine monitoring station, can monitor in real time boiler.
7, energy management station collects boiler real time data and the historical data at local monitor station by the Internet, and then analyze boiler energy consumption, burning efficiency, boiler actual load etc., form energy management form, utilize the man-machine interface of Automated condtrol configuration software process of establishing control system, make system directly perceived, simple to operate.
8. the PLC Programmable Logic Controller that master controller adopts is open system, meets international IEEE communication standard, has hardware index reliable, advanced now, and there is self-diagnostic function, its programming is easier to, and operating system is WINDOWS platform, operate more convenient, be also easy to online transmission data.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is to the control flow chart of blanking subsystem in the utility model.
Fig. 3 is the control flow chart of combustion subsystem in the utility model.
Fig. 4 is the control flow chart blowing grey subsystem in the utility model.
Fig. 5 is to the control flow chart of water subsystem in the utility model.
Fig. 6 is to water subsystem water circulation control process flow diagram in the utility model.
Fig. 7 is the control flow chart of boiler automatic ignition in the utility model.
Fig. 8 is the control flow chart of boiler shutdown in the utility model.
Fig. 9 is the control flow chart of boiler dusting in the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described:
A kind of automatic control system for middle-size and small-size coal dust industrial hot water boiler, as shown in Figure 1, comprise combustion managing system and control system, described combustion managing system is made up of energy management station 1 and remote supervisory station 2, and energy management station 1 is connected by Industrial Ethernet with remote supervisory station 2, described control system comprises master controller 3, central control unit 12, field instrumentation and actuator 6, local monitor station 4, video station 5, video camera 11, described central control unit 12 comprises to blanking subsystem 7, combustion subsystem 8, blow grey subsystem 9, to water subsystem 10, master controller 3 connects to blanking subsystem 7 by Industrial Ethernet, combustion subsystem 8, blow grey subsystem 9, to water subsystem 10, described field instrumentation comprises intelligent display meter, sensor and transmitter, intelligent display meter, sensor, the output terminal of transmitter is connected by the load module of signal cable with central control unit 12, the input end of actuator 6 is connected by the output module of signal cable with central control unit 12, video camera 11 is connected with video station 5 by signal cable, video station 5, master controller 3 is connected with local monitor station 4 by Industrial Ethernet with central control unit 12.
Principle of work: master controller 3 is by the signal of signal cable collection site transmitter, sensor, intelligent instrument, and signal type comprises thermal resistance, thermopair, current signal, on-off model etc.By writing automatic control program in master controller 3, carrying out Logic judgment and process control, exporting corresponding control signal to actuator, the on-the-spot actuator adopted comprises valve, motor, water pump, frequency converter etc.On local monitor station, configuration software is adopted to set up monitoring interface, communication is carried out by Industrial Ethernet between local monitor station and master controller, operator can pass through operation supervise and control interface, and then control on-site electrical equipment, the signal Real-time Feedback such as temperature, pressure at boiler scene to industrial computer, and is presented on monitoring interface with forms such as data, trend curve, histogram, alerting signal, forms.Key-course at the scene, master controller connects feeding system, combustion system, soot blower system, water supply system by PROFIBUS DP fieldbus, and each subsystem controls each process section respectively as the substation of master controller.Remote supervisory station passes through WEB Ethernet real time monitoring boiler operating state, as long as there is the place of network just can monitor boiler operatiopn.Energy management station collects the data at local monitor station by Ethernet, based on field data, by real time data and filing data, manages system energy, analyzes and obtains energy consumption form etc.
Concrete operation step is as follows:
1, central control unit operation steps.
(1) to blanking subsystem: as shown in Figure 2, in Pulverized Coal Bin, powder storehouse pressure transducer is installed, CO content detection sensor, powder storehouse temperature sensor, by gathering above data, security monitoring is carried out to powder storehouse, when having alerting signal, chain promoter powder storehouse axial flow blower, nitrogen is carried, the level sensor of Real-Time Monitoring powder storehouse high charge level is installed, LOAD CELLS is for gathering powder storehouse weight, the sensor of the actual material level in discrete acquisitions powder storehouse, pass through Through Several Survey Measure, the actual material level in cross validation powder storehouse, when material level height, and alarm, when material level is low, powder process is beaten in chain unlatching.Adopt screw feeder continuously to powder, by Frequency Converter Control machine supplying powder, according to boiler load demand, PID feedback regulation machine supplying powder rotating speed, and then realize accurately to powder.
(2) fuel sub-system: as shown in Figure 3, boiler load demand determines powder-feeding amount, and powder-feeding amount determines to air quantity, and heat demand determines output, and then affects boiler load.The basic task that boiler combustion process controls automatically is the needs that should provide heat adaptive system load, ensures the security of economy and the boiler operatiopn of burning again.In order to achieve the above object, the control system of combustion process comprises three adjustment tasks: namely maintain boiler leaving water temperature according to burden requirement, ensure optimal air-fuel ratio and ensure that combustion chamber draft is constant.Corresponding, there is three control loops adjust fuel amount, air output and absorbing quantity, confluent respectively.By give powder control module regulate powder-feeding amount, air output and absorbing quantity are realized by the cascade PID feedback regulation of combustion chamber draft, temperature, powder-feeding amount, confluent by water control unit realization.
(3) blow grey subsystem: as shown in Figure 4, according to actual motion needs, fly-ash separator purges by pressure reduction and time controling.By being arranged on the differential pressure transmitter Real-time Collection sack cleaner inlet outlet pressure differential signal on sack cleaner, and jetting in real time cloth bag or setting-up time winding-up cycle according to this signal control sack cleaner impulse electromagnetic valve, realizing automatic control winding-up.Storehouse pump automatic ash blowing, is realized by pressure, Level control and time controling.
(4) to water subsystem: as shown in Figure 5, boiler replenishing water pump is furnished with frequency converter, and small pump is according to the pressure of technological requirement setting pressurization point, do constant pressure water supply PID control program, regulate small pump rotating speed by frequency converter, timely amount of makeup water, anti-locking system lack of water, ensures system safety operation.Differential pressure self water feeding is changed into when frequency converter breaks down.
Boiler circulating water flow regulable control, boiler one secondary net establishes motor regulated valve as shown in Figure 6, keep leaving water temperature constant, according to the corresponding aperture size of the size adjustment of load consumption, the circulating water flow respective change when control valve opening changes, discharge pressure changes thereupon, and now PLC regulates the rotating speed of recirculated water frequency converter automatically by gathering discharge pressure real time data, circulating water flow is that value of feedback makes reference, thus realizes equalization of pressure.
For realizing the conservative control of recirculated water, system adopts multiple stage Frequency Converter Control water pump, originally only a water pump is opened, when system consumption increase valve opening becomes large, the output frequency also corresponding increase of ebullator frequency converter, when frequency converter is increased to the demand that highest frequency still can not meet system water, now can open a water pump again, then proceed this programmed control when system water amount continues to increase, increase the input of water circulating pump; When quantity of circulating water reduces, pump rotary speed is slack-off, and frequency converter exports and reduces, etc. when reducing to bottoming, then exit a water pump, now PLC system stops the output of a frequency converter, other run water pump and keep regulatory function constant, and so circulate, the fluctuation with load proceeds Load Regulation.
2, enable logic sequence flow.
(1) after water being carried out sofening treatment, by realizing boiler replenishing water to water control unit.
(2) automatic ignition control flow: as shown in Figure 6, opens induced draft fan, primary air fan, overfire air fan, and open First air and be adjusted to set pressure, combustion chamber draft is set as (debugging discreet value), and opening point ignition system starts igniting; Igniting (according to flame intensity and have fiery signal) whether success is observed by flame detector; Whether light a fire successfully, halt ignition system, continues logical oil (or coal gas), and stablize according to flame detector signal observation oil burner (or coal gas) flame; Under oil burner (or coal gas) flameholding, maintain (debugging is determined) second; Open machine supplying powder, pulverized coal conveying also carries out pulverized coal ignition; Coal feeder frequency setting is about 10Hz (discreet value need be determined by during debugging); Pulverized coal ignition whether successful (then artificial according to vision signal observation flame status if necessary) is observed by flame detector (according to having fiery signal and flame intensity signal); Under pulverized coal flame is stable, close oil burner (or gaspipe line solenoid valve); According to burner front end fired state, suitably progressively strengthen powder-feeding amount, regulate air output boiler to enter normal runing adjustment state.
(3) normal blowing out control flow: as shown in Figure 7, receive manual, automatic linkage blowing out signal, enter downtime schedule.Stop batcher, after setting-up time, stop primary air fan, then, regulate combustion chamber draft by fan blower and induced draft fan, after certain hour, turn off the blast machine, then after certain hour, stop induced draft fan, realize safe blowing out.In case of emergency, start and suddenly stop program, stop batcher, primary air fan, fan blower, regulate combustion chamber draft by induced draft fan, after certain hour, stop induced draft fan, realize urgent blowing out.
(4) at dedusting, soot-blowing control unit, as shown in Figure 8, import and export differential pressure, storehouse pump pressure, material level by monitoring fly-ash separator, operation dust remover blowing and storehouse pump blow ash automatically.
(5) for the equipment such as blower fan, water pump, to realize on the spot, local, long-range three kinds of control models, control procedure is as follows:
On local switch board, there is the switch knob of three kinds of control models, in control model on the spot, by the local control box on equipment side, realize the startup to motor, stopping, suddenly stop controlling, by the startup on case on the spot, stopping, scram button, in control box, relay obtains electric, dead electricity, and then controls frequency converter or motor obtains electric, dead electricity.
In local control model, by the button on cabinet door, in switch board, relay obtains electric, dead electricity, and then controls the major loop of frequency converter or motor.
At distance control mode, by PLC output startup, stopping, emergent stop signal, and then control frequency converter or the action of motor main circuit contactor, realize startup, stopping, frequency adjustment.Operating personnel can select manually on monitoring interface, automatic operation mode, when selecting manual mode, by clicking interface command button, sending control command to PLC, realizing controlling object, when selecting automatic mode, by the automatic control program in PLC, realize controlling object.
Master controller adopts existing PLC Programmable Logic Controller, selected PLC Programmable Logic Controller is open system, meet international IEEE communication standard, there is hardware index reliable, advanced now, and there is self-diagnostic function, its programming is easier to, and operating system is WINDOWS platform, operate more convenient, be also easy to online transmission data.
In above-described embodiment, intelligent display meter is dependable performance, safety, and the electronic type intelligent instrument of advanced person, wherein mainly requires that the instrument of stable performance is for application with PID control instrument, frequency converter etc.
Above-described embodiment can understand for those skilled in the art and use the utility model; not to restriction of the present utility model; all do within the utility model protection domain any amendment, equivalent replace or improve, all should be included within protection domain of the present utility model.
Claims (6)
1. for the automatic control system of middle-size and small-size coal dust industrial hot water boiler, comprise combustion managing system and control system, it is characterized in that described combustion managing system is made up of energy management station and remote supervisory station, energy management station is connected by Industrial Ethernet with remote supervisory station, described control system comprises master controller, central control unit, field instrumentation, actuator, local monitor station, video station, video camera, described central control unit comprises to blanking subsystem, combustion subsystem, blow grey subsystem, to water subsystem, master controller connects to blanking subsystem by Industrial Ethernet, combustion subsystem, blow grey subsystem, to water subsystem, described field instrumentation comprises intelligent display meter, sensor and transmitter, intelligent display meter, sensor, the output terminal of transmitter is connected with the load module of central control unit by signal cable, the input end of actuator is connected with the output module of central control unit by signal cable, video camera is connected with video station by signal cable, video station, master controller is connected with local monitor station by Industrial Ethernet with central control unit.
2. the automatic control system for middle-size and small-size coal dust industrial hot water boiler according to claim 1, is characterized in that the running status of described central control unit by input, output signal module monitors boiler, controls on-the-spot actuator.
3. the automatic control system for middle-size and small-size coal dust industrial hot water boiler according to claim 1, is characterized in that described energy management station, remote supervisory station access local monitor station by TCP/IP.
4. the automatic control system for middle-size and small-size coal dust industrial hot water boiler according to claim 1, it is characterized in that the signal of described master controller by signal cable collection site transmitter, sensor and intelligent display meter, described signal comprises thermal resistance signal, thermocouple signal, current signal, on-off model.
5. the automatic control system for middle-size and small-size coal dust industrial hot water boiler according to claim 1, is characterized in that described actuator comprises valve, motor, water pump, frequency converter.
6. the automatic control system for middle-size and small-size coal dust industrial hot water boiler according to claim 1, is characterized in that described master controller is PLC Programmable Logic Controller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420483309.6U CN204166354U (en) | 2014-08-26 | 2014-08-26 | For the automatic control system of middle-size and small-size coal dust industrial hot water boiler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420483309.6U CN204166354U (en) | 2014-08-26 | 2014-08-26 | For the automatic control system of middle-size and small-size coal dust industrial hot water boiler |
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| CN204166354U true CN204166354U (en) | 2015-02-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018018741A1 (en) * | 2016-07-29 | 2018-02-01 | 任春雷 | Smart control method utilized in heating, ventilation, and air conditioning room |
| CN109442465A (en) * | 2018-09-30 | 2019-03-08 | 上海全应科技有限公司 | The fitting sample of the instantaneous powder-feeding amount of pulverized-coal fired boiler chooses and metering method |
-
2014
- 2014-08-26 CN CN201420483309.6U patent/CN204166354U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018018741A1 (en) * | 2016-07-29 | 2018-02-01 | 任春雷 | Smart control method utilized in heating, ventilation, and air conditioning room |
| CN109442465A (en) * | 2018-09-30 | 2019-03-08 | 上海全应科技有限公司 | The fitting sample of the instantaneous powder-feeding amount of pulverized-coal fired boiler chooses and metering method |
| CN109442465B (en) * | 2018-09-30 | 2020-06-26 | 上海全应科技有限公司 | Fitting sample selection and metering method for instantaneous powder feeding amount of pulverized coal boiler |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150218 Termination date: 20150826 |
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| EXPY | Termination of patent right or utility model |