CN104976638A - Coal-burning boiler energy-saving method and apparatus - Google Patents
Coal-burning boiler energy-saving method and apparatus Download PDFInfo
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- CN104976638A CN104976638A CN201410129576.8A CN201410129576A CN104976638A CN 104976638 A CN104976638 A CN 104976638A CN 201410129576 A CN201410129576 A CN 201410129576A CN 104976638 A CN104976638 A CN 104976638A
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- coal
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- fire grate
- frequency converter
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- 238000000034 method Methods 0.000 title claims abstract description 27
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000001301 oxygen Substances 0.000 claims abstract description 19
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 19
- 239000003245 coal Substances 0.000 claims abstract description 11
- 238000002485 combustion reaction Methods 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000003915 air pollution Methods 0.000 abstract description 3
- 239000000446 fuel Substances 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 230000000505 pernicious effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The invention discloses a coal-burning boiler energy-saving method and apparatus. The invention solves the technical defects of low thermal efficiency, serious air pollution, and high cost of a chained coal-burning boiler caused by incomplete fuel combustion and excess air heat extraction loss in the current coal-burning boiler. The coal-burning boiler energy-saving apparatus can measure data of the boiler comprising rear arch temperature, furnace box temperature, steam flow, pressure in bubbles, oxygen content and the like, the measured data is calculated through the coal-burning boiler energy-saving method, and the calculating result is analyzed, thereby reasonably adjusting a coal feeder frequency converter, a fire grate frequency converter and a blower frequency converter to meet the need of reducing cost and atmospheric pollution.
Description
Technical field:
The present invention relates to a kind of coal-burning boiler energy-saving method and device.
Background technology:
China for live and most of coal-burning boiler actual operating efficiency of industrial application but well below design objective, its thermal efficiency does not even reach 60%.According to incompletely statistics, the fire coal of China every year for heating, wherein has quite a few coal-fired because the imperfect combustion of boiler and heat loss due to exhaust gas, slatterning in vain.Not only cause the waste of the energy, cause environmental pollution simultaneously.
In the market for live and the chained coal fired boiler of industry mainly adopts conventional automatic control system.The chained coal fired boiler of current this control system of employing mainly contains two large technological deficiencies: 1 is that fuel can not burn completely, and both blow rate required deficiency caused burning insufficient; 2 is excess air heat extraction losses, both the blow rate required was excessive, although fuel Thorough combustion, gathered a large amount of overfire airs in burner hearth, air blast frequency is excessive, in order to meet burner hearth tiny structure, air inducing frequency also will strengthen, and a large amount of hot-airs is pulled away, and the utilization rate of heat energy reduces, flue gas oxygen content is high all the better, thus causes air pollution serious.
Summary of the invention:
The invention provides a kind of coal-burning boiler energy-saving method and device, to improve the thermal efficiency, to reduce the use cost of coal-burning boiler, reduce the discharge of pernicious gas, reduce air pollution.
A kind of coal-burning boiler energy-saving method, comprise boiler fired coal Energy Saving Algorithm, its main contents are:
The monitoring equipment that S1 is carried by boiler obtains pressure in bubbles data X3, steam flow data X2, oxygen content data X6, rear arch temperature X4 and fire box temperature X5; And according to the area setting steam flow set point X1 of heating, according to optimal combustion efficiency setting oxygen content setting value X7;
Above-mentioned data calculate according to coal-burning boiler energy-saving algorithm by S2, obtain fire grate gross data, feeder gross data, air blast gross data;
Described coal-burning boiler energy-saving algorithm, its concrete operation is as follows:
The numerical value obtained from S1 obtains following data through boiler energy-saving method: Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y8, Y9 are process variable, and Z1 is fire grate gross data; Z2 is feeder gross data; Z3 is air blast gross data.
The calculating process of above-mentioned data is as follows:
Y1=X2／X3，
Y2=Y1*1.2，
Y3=Y2*X3，
Y4=PID(X2)，
Y5=P ID(Y3，Y4)，
Y6=X4／X5*100％，
Y7=1.8*Y5，
Y8=X6-X7，
Y9=PID(Y8)，
Z1=Y5／Y6，
Z2=1.3*Z1，
Z3=1.3*(Y7*Y9)；
P I D is the widely used automatic controller algorithm of the sector;
S3 regulates fire grate frequency converter, feeder frequency converter, blower variable frequency device respectively according to fire grate gross data, feeder gross data, air blast gross data;
A kind of chained coal fired boiler energy saver, it comprises:
A special machine cabinet server, programmable logic controller (PLC), original operating equipment of chained coal fired boiler, it comprises manual handling equipment, computation equipment, bubble measuring instrument, flow measurement of steam instrument, measure of oxygen content instrument, rear arch temperature measuring set, fire box temperature measuring instrument, fire grate, feeder, air blast; Original operating equipment of boiler connects according to original mode, and server cabinet and Programmable Logic Controller are connected by router or switch and netting twine, is connected between Programmable Logic Controller with computer operation table by router or switch and netting twine;
Described programmable logic controller (PLC), can be replaced distributed director, programmable logic controller (PLC) and distributed director load coal-burning boiler energy-saving algorithm, and, to fire grate frequency converter, feeder frequency converter, blower variable frequency device and fire grate frequency converter, feeder frequency converter, blower variable frequency device are regulated by output fastener transmission fire grate gross data, feeder gross data, air blast gross data.
Described special machine cabinet server, it is equipped with boiler efficiency managing and control system.
The invention has the beneficial effects as follows:
1. the present invention can make coal-burning boiler Thorough combustion, and maximizedly utilizes combustion heat energy, and cost is reduced.
2. the present invention can reduce the discharge of coal-burning boiler pernicious gas, reduces atmosphere pollution.
Accompanying drawing illustrates:
Accompanying drawing 1 is the schematic flow sheet of coal-burning boiler energy-saving method of the present invention and device.
Accompanying drawing 2 is computing schematic diagrames of coal-burning boiler energy-saving method of the present invention and device.
X1 in figure: steam flow set point; X2 steam flow data; X3 pressure in bubbles data; X4 rear arch temperature; X5 fire box temperature; X6 oxygen content data; X7 oxygen content setting value; Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y8, Y9: be process variable; Z1: fire grate gross data; Z2: feeder gross data; Z3: air blast gross data.
Accompanying drawing 3 is device connection layouts of coal-burning boiler energy-saving method of the present invention and device.
Detailed description of the invention:
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail:
Chained coal fired boiler power-economizing method and device, as shown in Figure 1, its concrete implementation step is:
S1: obtain the operating pressure in bubbles data X3 of chained coal fired boiler, steam flow data X2, oxygen content data X6, rear arch temperature X4 and fire box temperature X5 respectively by the bubble measuring instrument of coal-burning boiler, flow measurement of steam instrument, measure of oxygen content instrument, rear arch temperature measuring set and fire box temperature measuring instrument; And according to the area setting steam flow set point X1 of heating, setting oxygen content setting value X7.
Steam flow set point X1: steam flow set point X1 is according to the demand real-time change of user's pipe network.User side has steam flow measuring point, if flow increases, then setting value also will follow increase; If reduced, setting value also follows minimizing.
Oxygen content setting value X7: this setting value is through the numerical value that practitioner's long-term practice draws, when oxygen content data are about 7.5%, the efficiency of combustion of coal-burning boiler is optimum.
S2: the pressure in bubbles data X3 measured in step S1, steam flow data X2, oxygen content data X6, rear arch temperature X4 and fire box temperature X5, and calculate data steam flow set point X1 and the oxygen content setting value X7 of setting, by chain-type boiler power-economizing method, computing is carried out to above-mentioned numerical value and obtains fire grate gross data Z1, feeder gross data Z2 and air blast gross data Z3.
As shown in Figure 2, its calculating process is as follows for the calculating process of this chain-type boiler power-economizing method:
1. suppose the pressure in bubbles data X3=1.0MPa obtained in S1 step, steam flow data X2=40t, oxygen content data X6=12%, rear arch temperature X4=580 DEG C, fire box temperature X5=850 DEG C, steam flow set point X2=35t, oxygen content setting value X7=7%.
2. in 1, the numerical value of setting obtains following data through boiler energy-saving method: Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y8, Y9 are process variable, and Z1 is fire grate gross data; Z2 is feeder gross data; Z3 is air blast gross data.
The calculating process of above-mentioned data is as follows:
Y1=X2／X3=35／40=0.875，
Y2=Y1*1.2=0.875*1.2=1.05，
Y3=Y2*X3=1.05*1.0=1.05，
Y4=P I D(X2)，
Y5=PID(Y3，Y4)，
Y6＝X4／X5*100％，
Y7=1.8*Y5，
Y8＝X6-X7，
Y9=PID(Y8)，
Z1=Y5／Y6=65％，
Z2＝1.3*Z1=84.5％，
Z3＝1.3*(Y7*Y9)=78％；
P I D is the widely used automatic controller algorithm of the sector.
S3: according to the fire grate gross data Z1 obtained in step S2, feeder gross data Z2 and air blast gross data Z3, adjustment fire grate frequency converter, feeder frequency converter are also coordinated with it mutually with blower variable frequency device.
Regulate the principle of fire grate frequency converter, feeder frequency converter and blower variable frequency device as follows in this step:
By the output fastener on programmable logic controller (PLC) or distributed director, the fire grate gross data Z1 obtained in step S2, feeder gross data Z2 and air blast gross data Z3 are transferred to fire grate frequency converter, feeder frequency converter and blower variable frequency device, and regulate fire grate frequency converter, feeder frequency converter and blower variable frequency device according to proportional relation.
Illustrate below:
The maximum (top) speed of fire grate is 1480, and the fire grate gross data Z1 exported in step S2 is 65%, and the real data of fire grate is 700, and so the theoretical optimum data of fire grate is 1480*65%=962, therefore, just needs regulating stove row to be increased to 962 for best according to from 700.Feeder and air blast are same principle.
The connected mode of device:
Special machine cabinet server is linked with Programmable Logic Controller or distributed director by router and netting twine, and former computation equipment is linked with Programmable Logic Controller or distributed director by router and netting twine.
Embodiment described above has been that the best of the present invention is implemented.It describes the principal character of this invention and advantage of the present invention; above-mentioned embodiment and description are principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention; these changes and improvements all should be included in the scope of patent requirements of the present invention protection, and the protection domain of patent requirements of the present invention is by claims and equivalent circle thereof.
Claims (2)
1. coal-burning boiler energy-saving method, is characterized in that, comprises boiler fired coal Energy Saving Algorithm, and the main contents of this algorithm are:
S1: the monitoring equipment carried by boiler obtains pressure in bubbles data X3, steam flow data X2, oxygen content data X6, rear arch temperature X4 and fire box temperature X5; And according to the area setting steam flow set point X1 of heating, according to optimal combustion efficiency setting oxygen content setting value X7;
S2: above-mentioned data calculated according to coal-burning boiler energy-saving algorithm, obtains fire grate gross data, feeder gross data, air blast gross data;
The numerical value obtained from S1 obtains following data through boiler energy-saving method: Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y8, Y9 are process variable, and Z1 is fire grate gross data; Z2 is feeder gross data; Z3 is air blast gross data.
The calculating process of above-mentioned data is as follows:
Y1=X2／X3，
Y2=Y1*1.2，
Y3=Y2*X3，
Y4=PID(X2)，
Y5=PID(Y3，Y4)，
Y6=X4／X5*100％，
Y7=1.8*Y5，
Y8=X6-X7，
Y9=P I D(Y8)，
Z1=Y5／Y6，
Z2=1.3*Z1，
Z3=1.3*(Y7*Y9)；
S3: regulate fire grate frequency converter, feeder frequency converter, blower variable frequency device respectively according to fire grate gross data, feeder gross data, air blast gross data;
Energy-conserving apparatus, is characterized in that, comprises device:
A special machine cabinet server, programmable logic controller (PLC), original operating equipment of chained coal fired boiler, it comprises manual handling equipment, computation equipment, bubble measuring instrument, flow measurement of steam instrument, measure of oxygen content instrument, rear arch temperature measuring set, fire box temperature measuring instrument, fire grate, feeder, air blast; Original operating equipment of boiler connects according to original mode, and server cabinet and Programmable Logic Controller are connected by router or switch and netting twine, is connected between Programmable Logic Controller with computer operation table by router or switch and netting twine;
Described programmable logic controller (PLC), it is characterized in that, can be replaced distributed director, programmable logic controller (PLC) and distributed director load coal-burning boiler energy-saving algorithm, and, to fire grate frequency converter, feeder frequency converter, blower variable frequency device and fire grate frequency converter, feeder frequency converter, blower variable frequency device are regulated by output fastener transmission fire grate gross data, feeder gross data, air blast gross data.
2. described coal-burning boiler energy-saving method according to claim 1 and device, it is characterized in that, described special machine cabinet server, it is equipped with boiler efficiency managing and control system.
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| CN201410129576.8A CN104976638B (en) | 2014-04-02 | 2014-04-02 | Coal-burning boiler energy-saving method and device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101046296A (en) * | 2006-03-31 | 2007-10-03 | 吴仲贤 | Comprehensive energy-saving method for boiler or industrial furnace and kiln |
| CN101338890A (en) * | 2008-07-03 | 2009-01-07 | 左为干 | Coal-burning boiler energy-saving method and apparatus |
| US20110011315A1 (en) * | 2009-07-14 | 2011-01-20 | Hitachi, Ltd. | Oxyfuel Boiler and Control Method for Oxyfuel Boiler |
| CN102853448A (en) * | 2012-07-05 | 2013-01-02 | 河北省首钢迁安钢铁有限责任公司 | Optimization method for combustion system of slab heat accumulating type heating furnace |
| CN202993252U (en) * | 2012-12-17 | 2013-06-12 | 南京工业职业技术学院 | Combustion control system for heating medium heater |
-
2014
- 2014-04-02 CN CN201410129576.8A patent/CN104976638B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101046296A (en) * | 2006-03-31 | 2007-10-03 | 吴仲贤 | Comprehensive energy-saving method for boiler or industrial furnace and kiln |
| CN101338890A (en) * | 2008-07-03 | 2009-01-07 | 左为干 | Coal-burning boiler energy-saving method and apparatus |
| US20110011315A1 (en) * | 2009-07-14 | 2011-01-20 | Hitachi, Ltd. | Oxyfuel Boiler and Control Method for Oxyfuel Boiler |
| CN102853448A (en) * | 2012-07-05 | 2013-01-02 | 河北省首钢迁安钢铁有限责任公司 | Optimization method for combustion system of slab heat accumulating type heating furnace |
| CN202993252U (en) * | 2012-12-17 | 2013-06-12 | 南京工业职业技术学院 | Combustion control system for heating medium heater |
Non-Patent Citations (1)
| Title |
|---|
| 吕明道等: "锅炉的优化运行问题", 《技术与教育》 * |
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Effective date of registration: 20210520 Address after: No.104, 14th building, Jiaoda San village, Beilin District, Xi'an City, Shaanxi Province, 710001 Patentee after: Shi Ren Address before: Room 10602, building 3, dongyaofang community, 198 Jinhua North Road, Beilin District, Xi'an City, Shaanxi Province, 710001 Patentee before: Xi'an Jiekang Energy Technology Co.,Ltd. |
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Effective date of registration: 20220815 Address after: Room 10602, Building 3, Dongyaofang Community, No. 198, Jinhua North Road, Beilin District, Xi'an City, Shaanxi Province 710000 Patentee after: Xi'an Jiekang Energy Technology Co.,Ltd. Address before: 710000 Room 502, unit 2, building 4, Gaoshan Liushui Hecheng, Taibai South Road, high tech Zone, Xi'an, Shaanxi Patentee before: Xi'an Maisi Intelligent Control Software Technology Co.,Ltd. |