CN102620312B - Intelligent coal metering system - Google Patents
Intelligent coal metering system Download PDFInfo
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- CN102620312B CN102620312B CN201210113830.6A CN201210113830A CN102620312B CN 102620312 B CN102620312 B CN 102620312B CN 201210113830 A CN201210113830 A CN 201210113830A CN 102620312 B CN102620312 B CN 102620312B
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- coal
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Abstract
The invention discloses an intelligent coal metering system, which comprises a coal metering device, a water and agent adding device, a spray and mixing device and a monitoring control device. The monitoring control device is connected with the coal metering device and the water and adding device. The water and agent adding device is connected with the spray and mixing device. The coal metering device comprises a coal conveying belt, a belt weighter and a limit switch. The water and agent adding device comprises a water tank, a conveying pump, an auxiliary equipment tank, a metering pump, a liquidometer, a flow meter and a mixer. The intelligent coal metering system can accurately meter instant coal feeding amount and accumulated coal feeding amount, achieves reasonable proportion and automatic control of water adding amount and coal feeding amount, introduces boiler parameters, and achieves online monitoring.
Description
Technical field
The invention belongs to heating field, particularly relate to a kind of intelligent coal metering system using during for boiler feeding coal.
Background technology
China's middle and small burn coal boiler (containing heating boiler) is approximately more than 50 ten thousand at present, discharges every year approximately more than 200 ten thousand tons of flue dust, SO
2approximately 7,000,000 tons, CO
2approximately nearly 1,000,000,000 tons, with regard to the heating industry of Tianjin, region heat supply burning coal boiler room in Tianjin has 400 at present, 2.2 hundred million square metres of whole city's area of heat-supply services, and coal consumption reaches more than 500 ten thousand tons, accounts for 1/10th of whole city's coal consumption.Through large to the power consumption of Tianjin emphasis, with serious pollution 157 boiler rooms, investigate, diagnosis of technique, economical operation evaluation, metering detect, and to there being the energy-conservation and management power saving of influence technique, organizes each side expert, universities and colleges and energy-saving equipment production unit to combine tackling key problem.Wherein gather altogether 2700 multi-group datas, by analyzing, can find out, coal-burning boiler is some problem below main existence at present: 1) average size is little, and operating load is low; 2) ature of coal is poor and coal is changeable (because coal type change is large, and grate furnace is poor to coal adaptability, when fire coal changes, can not take emergency measure targetedly, has reduced like this thermal efficiency of boiler, has also increased the pollutant emission of boiler); 3) there is more deficiency in boiler plant itself, and middle and small burn coal boiler manufacturer is many, and model is complicated, and the production year, for difference, does not therefore have unified technology, must carry out the diagnosis of equipment and system, formulates prioritization scheme, and carries out specific aim transformation; 4) boiler operatiopn instrumentation is incomplete, and upper coal amount does not have weighing system accurate-metering, and operations staff is difficult to operation conditions to judge and adjusted at any time.
Therefore adopt monitoring automatically, the accurate automatic technology such as controls, and according to ature of coal optimal control coal-water ratio and upper coal amount, overheavy firing is low with solution boiler combustion efficiency, discharge capacity is large, it is most important that subsidiary engine such as does not match at the problem.
Summary of the invention
The technical problem to be solved in the present invention is a kind of intelligent coal metering system of design, can realize the accurate measurement of instantaneous upper coal amount and the upper coal amount of accumulative total, realizes rational proportion and the automation of amount of water and upper coal amount and controls, and introduces boiler parameter, realizes on-line monitoring.
To achieve these goals, the technical solution used in the present invention is: a kind of intelligent coal metering system, is characterized in that: comprise that coal metering device, Jia Shui add agent device, spraying and mixing device and monitor controller; Described monitor controller connects coal metering device and Jia Shui adds agent device, described in add water and add agent device and connect spraying and mixing device.
Wherein, coal metering device comprises coal conveyer belt, belt conveyer scale, limit switch, and described belt conveyer scale is arranged on the support of coal conveyer belt, and described coal conveyer belt is provided with rotation sensor, and described limit switch is arranged on the discharge plate of boiler coal bunker; Described belt conveyer scale is connected belt conveyer scale instrument with rotation sensor by holding wire, sends belt balance weighing signal and belt turn signal to belt conveyer scale instrument, and belt conveyer scale instrument is issued monitor controller by Ethernet by signal; Limit switch connects signal box by holding wire, and signal box connects monitor controller, and the switching signal of the discharge plate of boiler coal bunker is sent to monitor controller.
Wherein, adding water adds agent device and comprises water tank, delivery pump, auxiliary equipment case, measuring pump, liquid level gauge, flowmeter, blender; Described water tank connects delivery pump, and described delivery pump connects blender by adding water ga(u)ge; Described auxiliary equipment case connects measuring pump, and described measuring pump connects blender by adding agent flux meter, and assistant is sent into blender, is mixed into the mixed liquor of rational proportion with water; In described water tank and described auxiliary equipment case, be all provided with liquid level gauge, liquid level gauge connects monitor controller, and liquid level signal is sent to monitor controller; Describedly add water ga(u)ge and add agent flux meter and be all connected monitor controller, transmitted traffic signal; Described delivery pump is connected monitor controller with measuring pump by holding wire, start and stop, the FM signal in order to receive monitor controller, sent.
Wherein, spraying and mixing device comprises manual ball valve, atomizer, and described manual ball valve connects respectively atomizer by pipeline and Jia Shui adds the blender in agent device, is used for controlling flowing of mixed liquor; Atomizer is by mixed liquor after atomization, and spray is on the coal seam of belt.
Wherein, described monitor controller comprises console, On-line Control software systems, on-line monitoring software systems, and described console is provided with PLC controller, and described On-line Control software systems and on-line monitoring software systems are arranged on console; Described console gathers belt balance weighing signal, limit switch signal, liquid level signal, flow signal, offer On-line Control software systems, On-line Control software systems are according to the ature of coal analysis data of input, calculate rational coal water coal agent ratio and send that control signal is controlled output pump water adding, measuring pump adds agent; Described console also connects the sensor in boiler, gathers supply water temperature, return water temperature, the water supply flow of boiler, offers on-line monitoring software systems, realizes real time on-line monitoring, and can calculate in time boiler thermal output according to calculating.
Beneficial effect of the present invention is:
(1) can realize the accurate measurement of instantaneous upper coal amount and the upper coal amount of accumulative total, and also can realize the cumulative measurement to every coal quantity of boiler, gather simultaneously, record the signal of boiler operatiopn quantity of heat production and reflection fuel combustion situation, by data analysis, the ruuning situation of examination boiler, for the economical operation of boiler provides reference.
(2) coal metering device that the present invention adopts and spray mixing apparatus and automation control, monitoring system, can, according in real time upper coal amount, amount of water, realize the reasonable science of coal-fired amount of water and add.Evenly spray on coal seam, Forced Mixing stirs, and makes the coal-fired stewing water of realizing in coal bunker, the inside of impelling aqua infiltration coal, general 8～12 hours (depending on bunkering capacity and coal number of times in the sky).With overheavy firing, improve boiler efficiency, reach effects of energy saving and emission reduction.
(3) the present invention can solve under the prerequisite of existing issue, carry out lot of experiments, the automation control system that application Programmable Logic Controller (PLC) is core, multinomial metering process is simplified, and can realize the functions such as monitoring, early warning and data acquisition, record of processing procedure, realize the most economical proportioning of different atures of coal (caloric value, sulfur content) amount of water and automation are controlled.
(4) use the present invention, in heating system, the supply and return water temperature of every boiler, flow, gross heat input, total coal consumption, coal are always inputted heat and can be realized real time on-line monitoring, and can calculate in time boiler thermal output according to calculating, can this as operations staff, adjust in time combustion system, the reference that boiler is moved under higher economic indicator.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is process chart of the present invention.
Wherein:
1, coal conveyer belt.2, belt conveyer scale.
3, limit switch.4, rotation sensor.
5, belt conveyer scale instrument.6, signal box.
7, boiler coal bunker.8, water tank.
9, delivery pump.10, auxiliary equipment case.
11, measuring pump.12, liquid level gauge.
13, blender.14, add water ga(u)ge.
15, add agent flux meter.16, manual ball valve.
17, console.18, atomizer.
The specific embodiment
The present invention is divided into coal metering device, Jia Shui adds agent device, spraying and mixing device and monitor controller;
As shown in Figure 1, coal metering device comprises coal conveyer belt 1, belt conveyer scale 2, limit switch 3, described belt conveyer scale 2 is arranged on the support of coal conveyer belt 1, and described coal conveyer belt 1 is provided with rotation sensor 4, and described limit switch 3 is arranged on the discharge plate of boiler coal bunker 7; Described belt conveyer scale 2 is connected belt conveyer scale instrument 5 with rotation sensor 4 by holding wire, sends belt balance weighing signal and belt turn signal to belt conveyer scale instrument 5, and belt conveyer scale instrument 5 is issued monitor controller by Ethernet by signal; Limit switch 3 connects signal box 6 by holding wire, and signal box 6 connects monitor controller, and the switching signal of the discharge plate of boiler coal bunker 7 is sent to monitor controller.
The computational methods of upper coal amount are as follows:
First determine the installation site of belt conveyer scale 2, and then determine itself and the spacing Y of different boiler rooms.
Y ÷ v (belt speed)=t
T is the time delay of scattering and metering by furnace, and different boilers arrange different t1, t2, t3
When coal is delivered to belt conveyer scale 2 places, belt conveyer scale 2 during by the instantaneous upper coal amount of non-zero, starts metering.If now the discharge plate of 1# stove is closed, limit switch 3 feedback shutdown signals, start the upper coal amount cummulative metering of 1# stove; When the discharge plate of 1# stove is opened, limit switch 3 feedback opening signals, finish the upper coal amount cummulative metering of 1# stove, through sequential operation, deduct coal amount in the accumulative total in t1 time delay, coal amount in the accumulative total of this section of time 1# stove
this correction need add in the stove cumulant of coal on next need.
Consider that execute-in-place there will be two or many situations that stove discharge plate is closed simultaneously, scattering and metering by furnace is controlled and is provided with position priority, take coal conveyer belt 1 foremost discharge plate limit switch signal for preferentially.
As shown in Figure 1, adding water adds agent device and comprises water tank 8, delivery pump 9, auxiliary equipment case 10, measuring pump 11, liquid level gauge 12, flowmeter, blender 13; Described water tank 8 connects delivery pump 9, and described delivery pump 9 connects blender 13 by adding water ga(u)ge 14; Described auxiliary equipment case 10 connects measuring pumps 11, and described measuring pump 11 connects blenders 13 by adding agent flux meter 15, and assistant is sent into blender 13, is mixed into the mixed liquor of rational proportion with water; In described water tank 8 and described auxiliary equipment case 10, be all provided with liquid level gauge 12, liquid level gauge 12 connects monitor controller, and liquid level signal is sent to monitor controller; Describedly add water ga(u)ge 14 and add agent flux meter 15 and be all connected monitor controller, transmitted traffic signal; Described delivery pump 9 is connected monitor controller with measuring pump 11 by holding wire, start and stop, the FM signal in order to receive monitor controller, sent.
Spraying and mixing device comprises manual ball valve 16, atomizer 18, and described manual ball valve 16 connects respectively atomizer 18 by pipeline and Jia Shui adds the blender 13 in agent device, is used for controlling flowing of mixed liquor; Atomizer 18 is by mixed liquor after atomization, and spray is on the coal seam of coal conveyer belt 1.
Described monitor controller comprises console 17, On-line Control software systems, on-line monitoring software systems, and described console 17 is provided with PLC controller, and described On-line Control software systems and on-line monitoring software systems are arranged on console 17; As shown in Figure 2, described console 17 gathers belt balance weighing signal, limit switch signal, liquid level signal, flow signal, offer On-line Control software systems, On-line Control software systems are according to the ature of coal analysis data of input, calculate rational coal water coal agent ratio and send control signal and control that rear pump 9 adds water, measuring pump 11 adds agent; As shown in Figure 2, described console 17 also connects the sensor in boiler, gathers supply water temperature, return water temperature, the water supply flow of boiler, offers on-line monitoring software systems, realizes real time on-line monitoring, and can calculate in time boiler thermal output according to calculating.
The above, it is only preferred embodiment of the present invention, not technical scheme of the present invention is done to any pro forma restriction, any simple modification, equivalent variations and modification that every foundation technical spirit of the present invention is done above embodiment, all still belong in the scope of technical scheme of the present invention.
Claims (3)
1. an intelligent coal metering system, is characterized in that: comprise that coal metering device, Jia Shui add agent device, spraying and mixing device and monitor controller; Described monitor controller connects coal metering device and Jia Shui adds agent device, described in add water and add agent device and connect spraying and mixing device;
Described coal metering device comprises coal conveyer belt, belt conveyer scale, limit switch, and described belt conveyer scale is arranged on the support of coal conveyer belt, and described coal conveyer belt is provided with rotation sensor, and described limit switch is arranged on the discharge plate of boiler coal bunker; Described belt conveyer scale is connected belt conveyer scale instrument with rotation sensor by holding wire, sends belt balance weighing signal and belt turn signal to belt conveyer scale instrument, and belt conveyer scale instrument is issued monitor controller by Ethernet by signal; Limit switch connects signal box by holding wire, and signal box connects monitor controller, and the switching signal of the discharge plate of boiler coal bunker is sent to monitor controller;
The described water that adds adds agent device and comprises water tank, delivery pump, auxiliary equipment case, measuring pump, liquid level gauge, flowmeter, blender; Described water tank connects delivery pump, and described delivery pump connects blender by adding water ga(u)ge; Described auxiliary equipment case connects measuring pump, and described measuring pump connects blender by adding agent flux meter, and assistant is sent into blender, is mixed into the mixed liquor of rational proportion with water; In described water tank and described auxiliary equipment case, be all provided with liquid level gauge, liquid level gauge connects monitor controller, and liquid level signal is sent to monitor controller; Describedly add water ga(u)ge and add agent flux meter and be all connected monitor controller, transmitted traffic signal; Described delivery pump is connected monitor controller with measuring pump by holding wire, start and stop, the FM signal in order to receive monitor controller, sent.
2. a kind of intelligent coal metering system according to claim 1, it is characterized in that: described spraying and mixing device comprises manual ball valve, atomizer, described manual ball valve connects respectively atomizer by pipeline and Jia Shui adds the blender in agent device, is used for controlling flowing of mixed liquor; Atomizer is by mixed liquor after atomization, and spray is on the coal seam of belt.
3. a kind of intelligent coal metering system according to claim 1, it is characterized in that: described monitor controller comprises console, On-line Control software systems, on-line monitoring software systems, described console is provided with PLC controller, and described On-line Control software systems and on-line monitoring software systems are arranged on console; Described console gathers belt balance weighing signal, limit switch signal, liquid level signal, flow signal, offer On-line Control software systems, On-line Control software systems, according to the ature of coal analysis data of input, are calculated rational coal water coal agent ratio and send control signal control and carry pump water adding, measuring pump to add agent; Described console also connects the sensor in boiler, gathers supply water temperature, return water temperature, the water supply flow of boiler, offers on-line monitoring software systems, realizes real time on-line monitoring, and can calculate in time boiler thermal output according to calculating.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210113830.6A CN102620312B (en) | 2012-04-18 | 2012-04-18 | Intelligent coal metering system |
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| CN201210113830.6A CN102620312B (en) | 2012-04-18 | 2012-04-18 | Intelligent coal metering system |
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| CN102620312A CN102620312A (en) | 2012-08-01 |
| CN102620312B true CN102620312B (en) | 2014-07-16 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103528085B (en) * | 2013-10-14 | 2016-01-27 | 江苏长乐纤维科技有限公司 | A kind of device for improving bituminous coal combustion efficiency |
| CN114646051B (en) * | 2022-03-17 | 2023-06-23 | 国网湖南省电力有限公司 | Automatic control method and system for water supply of wet running boiler of supercritical thermal power unit |
Citations (7)
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| CN1137114A (en) * | 1995-05-30 | 1996-12-04 | 宋成法 | Feeding method for double-constant feeding conveyer-belt weigher |
| CN1167900A (en) * | 1997-03-19 | 1997-12-17 | 魏楠 | Method and apparatus for measuring coal consumption of unit generator set in thermal power plant |
| CN1507487A (en) * | 2001-03-28 | 2004-06-23 | SGT�ع��������ι�˾ | Reducing sulfur dioxide emissions from coal combustion |
| CN1538110A (en) * | 2003-10-23 | 2004-10-20 | 北京海淀华煤水煤浆技术开发中心 | Press grinding technology for preparing water-coal sturry |
| CN1609181A (en) * | 2004-09-03 | 2005-04-27 | 张云德 | Sulfur-fixing coal saving agent |
| CN101530756A (en) * | 2008-03-11 | 2009-09-16 | 浙江世傢节能材料有限公司 | Intellectualized real-time matching automatic control continuous stirring system |
| CN202511319U (en) * | 2012-04-18 | 2012-10-31 | 天津力源永春科技发展有限公司 | Intelligent coal metering system |
-
2012
- 2012-04-18 CN CN201210113830.6A patent/CN102620312B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1137114A (en) * | 1995-05-30 | 1996-12-04 | 宋成法 | Feeding method for double-constant feeding conveyer-belt weigher |
| CN1167900A (en) * | 1997-03-19 | 1997-12-17 | 魏楠 | Method and apparatus for measuring coal consumption of unit generator set in thermal power plant |
| CN1507487A (en) * | 2001-03-28 | 2004-06-23 | SGT�ع��������ι�˾ | Reducing sulfur dioxide emissions from coal combustion |
| CN1538110A (en) * | 2003-10-23 | 2004-10-20 | 北京海淀华煤水煤浆技术开发中心 | Press grinding technology for preparing water-coal sturry |
| CN1609181A (en) * | 2004-09-03 | 2005-04-27 | 张云德 | Sulfur-fixing coal saving agent |
| CN101530756A (en) * | 2008-03-11 | 2009-09-16 | 浙江世傢节能材料有限公司 | Intellectualized real-time matching automatic control continuous stirring system |
| CN202511319U (en) * | 2012-04-18 | 2012-10-31 | 天津力源永春科技发展有限公司 | Intelligent coal metering system |
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| CB03 | Change of inventor or designer information |
Inventor after: Di Chuntian Inventor after: Zhao Lianhai Inventor after: Yu Jia Inventor after: Shen Yaqin Inventor before: Cui Chuntian Inventor before: Zhao Lianhai Inventor before: Yu Jia Inventor before: Shen Yaqin |
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Free format text: CORRECT: INVENTOR; FROM: CUI CHUNTIAN ZHAO LIANHAI YU JIA SHEN YAQIN TO: ZHAI CHUNTIAN ZHAO LIANHAI YU JIA SHEN YAQIN |
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Granted publication date: 20140716 Termination date: 20200418 |