CN101832577A - On-line measurement device of split-phase combustion concentration of pulverized coal in power plant and control method - Google Patents
On-line measurement device of split-phase combustion concentration of pulverized coal in power plant and control method Download PDFInfo
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- CN101832577A CN101832577A CN 201010157148 CN201010157148A CN101832577A CN 101832577 A CN101832577 A CN 101832577A CN 201010157148 CN201010157148 CN 201010157148 CN 201010157148 A CN201010157148 A CN 201010157148A CN 101832577 A CN101832577 A CN 101832577A
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Abstract
The invention discloses an on-line measurement device of split-phase combustion concentration of pulverized coal in a power plant and a control method. The measurement system comprises a concentrated and diluted phase separator arranged in a rectangular pipe and is characterized in that the rectangular pipe is divided into a pulverized coal separating section and a pulverized coal measuring section according to the flowing direction of pulverized coal, the concentrated and diluted phase separator is transversely arranged in the separating section, the pulverized coal measuring section is provided with a horizontal baffle plate dividing the measuring section into a concentrated phase channel and a diluted phase channel; and two side walls of each channel are respectively provided with a pair of wall surface sensors with metal electrodes, and capacitor signals induced by the metal electrodes of each pair of sensors are connected to a singlechip which is connected with a controller to output a control signal to the concentrated and diluted phase separator. Parameters of a concentrated phase and a diluted phase of the pulverized coal can be measured by two pairs of electrode measuring probes, and then input to the singlechip; the signal is output from the controller to control the action of the separator, thereby realizing purposes of improving the combustion working condition, enhancing the thermal efficiency, and achieving the optimal target of fully combusting the pulverized coal.
Description
Technical field
The present invention relates to a kind of clean burning fields of measurement, particularly a kind of concentration on-line measurement device and control method that is applicable to the defeated powder system coal dust burning phase-splitting of heat power plant boiler.
Background technology
The most of electric power energy of China is to rely on coal fired power generation at present, is provided by heat power station.The coal energy is the limited energy, and is the contaminative energy, so the proportioning of defeated powder system coal dust of reasonably optimizing station boiler and air capacity realizes phase-splitting (concentrated phase is with mutually light) burning, improves combustion conditions, improves the thermal efficiency, reduces NO
XGenerate, guarantee that low-load combustion-stabilizing is crucial.Therefore, coal powder density on-line measurement of research and development burning phase-splitting and control system, realize the coal powder density on-line measurement of phase-splitting in the coal-burning boiler and control in real time and adjustment, promote deep or light two phase combustion Study on Technology and popularization, have important and far-reaching meaning for the energy-saving and emission-reduction strategy.
Existing shade burner is the improvement on the defeated powder system basis of traditional power plant boiler cylinder type, defeated powder system for square pipe, form by pulverized coal channel, coal powder light-dark phase separator, by regulating the deflection angle of separator baffle plate in advance, control the deep or light of coal dust in the square pipe, realize deep or light burning phase-splitting, improve combustion conditions, improve the thermal efficiency.But the deflection angle of separating plate is to judge by workman's experience in the defeated powder system of this square pipe, but does not have the operating technology of quantitative property.
Summary of the invention
At existing deep or light phase Burner Technology, the deflection of considering separating plate is to rely on simple experience to judge, and the deflection angle of separating plate can not be realized shortcomings such as control in real time.Thereby a kind of coal powder light-dark phase concentration real-time monitoring device and control method are proposed.
For reaching above purpose, the present invention takes following technical scheme to be achieved: a kind of on-line measurement device of split-phase combustion concentration of pulverized coal in power plant, comprise the dense-and-weak separator that is arranged in the rectangular duct, it is characterized in that, described rectangular duct is divided into coal dust segregation section and coal dust measuring section according to the coal dust flow direction, dense-and-weak separator is horizontally installed on segregation section, the coal dust measuring section is provided with longitudinal baffle measuring section is divided into light phase and two passageways of concentrated phase, each two side, passageway respectively is provided with the wall sensor of a pair of band metal electrode, the capacitance signal that the metal electrode of every pair of sensor is sensed is connected to a single-chip microcomputer, and this single-chip microcomputer connects a controller and outputs a control signal to described dense-and-weak separator.
In the such scheme, described wall sensor comprises a potsherd, is covered with metal electrode on the one side in its relative passageway.Described potsherd is made by alumina material, and described metal electrode is to adopt molybdenum manganese metal technology that molybdenum manganese powder sintering is plated one deck nickel again on ceramic matrix to form.
Three of comprising of described dense-and-weak separator laterally are spacedly distributed at the separating plate of segregation section, and the rotating shaft that each separating plate is provided with by the rectangular duct bottom connects a motor, and this motor is controlled by the controller and can drives this separating plate original position deflection 60 degree.
Utilize above-mentioned on-line measurement device of split-phase combustion concentration to realize the control method of split-phase combustion concentration of pulverized coal, comprise the steps: by being installed in a pair of wall sensor in light phase and two passageways of concentrated phase, gather the interelectrode capacitance of described passageway wall sensor metal respectively and be input to single-chip microcomputer, this capacitance has been reacted the concentration parameter of the coal dust firing in dense, the light phase passageway of flowing through; Single-chip microcomputer carries out data to the signal of the coal dust firing concentration parameter that collects dense, the light phase of reaction passageway to be handled, and compare or calculate with predefined normal concentration parameter, output control parameter is to controller then, carry out signal by controller output at last and send into dense-and-weak separator, dense-and-weak separator changes the concentration of the coal dust firing in dense, light phase passageway, thereby realizes the control accurately in real time to the deep or light phase of pulverized coal channel.
Advantage of the present invention is, by the capacitance signal of gathering electrode in the square pulverized coal feed pipe bias pulverized coal concentration is monitored in real time, and through single-chip data processing and controller, deflection angle to separating plate is controlled in real time, thereby can realize improving combustion conditions, improve the purpose of the thermal efficiency, reach the optimum target of coal dust firing.
Description of drawings
Fig. 1 is the structural representation of on-line measurement device of split-phase combustion concentration of pulverized coal of the present invention.
Fig. 2 is the wall sensor construction schematic diagram among Fig. 1.
Fig. 3 is the measurement and the control principle figure of Fig. 1 device.
Among Fig. 1 to Fig. 3: 1, rectangular duct; 2, separating plate; 3, wall sensor; 4, longitudinal baffle; 5, light phase passageway; 6, concentrated phase passageway; 7, metal electrode; 8, installing hole; 9, potsherd.
The specific embodiment
The present invention is described in further detail below in conjunction with drawings and the specific embodiments.
As Fig. 1, shown in Figure 3, a kind of on-line measurement device of split-phase combustion concentration of pulverized coal in power plant comprises the dense-and-weak separator that is arranged in the rectangular duct 1, and rectangular duct is divided into coal dust segregation section A and coal dust measuring section B according to the coal dust flow direction.Dense-and-weak separator laterally is spacedly distributed by three and forms at the separating plate 2 of segregation section, the rotating shaft that each separating plate is provided with by the rectangular duct bottom connects a motor (not drawing among the figure), and this motor is controlled by the controller and can drives this separating plate 2 original position deflections 60 degree.
Coal dust measuring section B is provided with longitudinal baffle 4 measuring section is divided into light phase and two passageways of concentrated phase 5,6, each two side, passageway respectively is provided with the wall sensor 3 of a pair of band metal electrode 7, the capacitance signal that the metal electrode 7 of every pair of sensor is sensed is connected to a single-chip microcomputer, and the capacitance signal of wherein light phase passageway sensor sensing is C1; The capacitance signal of concentrated phase passageway sensor sensing is C2.Single-chip microcomputer connects a controller and outputs a control signal on three motors that are connected with the rotating shaft of three separating plate 2 rectangular ducts bottoms.
As shown in Figure 2, wall sensor 3 comprises a potsherd 9, is covered with metal electrode 7 on the one side in its relative passageway.This potsherd 9 is made by alumina material, and metal electrode 7 is to adopt molybdenum manganese metal technology that molybdenum manganese powder sintering is plated one deck nickel again on the ceramic matrix of potsherd 9 to form.In order to reduce the cost, the present invention can only install a ceramic wafer 9 on longitudinal baffle 4, electrode 7 (Fig. 3) has all metallized on the two sides on this ceramic wafer, can constitute electrode with the electrode on light passageway mutually 5, the concentrated phase passageway 6 outer sidewall ceramic wafers so respectively, just can measure the capacitance parameter of the deep or light two-phase of coal dust firing by three wall sensors.
Utilize on-line measurement device of split-phase combustion concentration shown in Figure 1 to realize the control method of split-phase combustion concentration of pulverized coal, comprise the steps: by being installed in a pair of wall sensor 3 in two passageways of light phase and concentrated phase 5,6, the capacitance C1, the C2 that gather 7 at described passageway wall sensor metal electrode respectively are input to single-chip microcomputer, and this capacitance has been reacted the concentration parameter of the coal dust firing in dense, the light phase passageway 5,6 of flowing through; Single-chip microcomputer carries out data to the signal of the coal dust firing concentration parameter that collects dense, the light phase of reaction passageway to be handled, and compare or calculate with predefined normal concentration parameter, output control parameter is to controller then, carry out signal by controller output at last and send into three small machines, the rotation of motor drives separating plate 2 original position deflections separately, and then can change the concentration of the coal dust firing in dense, the light phase passageway 5,6 of flowing through, realize control accurately in real time to the deep or light phase of pulverized coal channel.
Claims (6)
1. on-line measurement device of split-phase combustion concentration of pulverized coal in power plant, comprise the dense-and-weak separator that is arranged in the rectangular duct, it is characterized in that, described rectangular duct is divided into coal dust segregation section and coal dust measuring section according to the coal dust flow direction, dense-and-weak separator is horizontally installed on segregation section, the coal dust measuring section is provided with longitudinal baffle measuring section is divided into light phase and two passageways of concentrated phase, each two side, passageway respectively is provided with the wall sensor of a pair of band metal electrode, the capacitance signal that the metal electrode of every pair of sensor is sensed is connected to a single-chip microcomputer, and this single-chip microcomputer connects a controller and outputs a control signal to described dense-and-weak separator.
2. on-line measurement device of split-phase combustion concentration of pulverized coal in power plant as claimed in claim 1 is characterized in that, described wall sensor comprises a pair of potsherd, is covered with metal electrode on the one side in its relative passageway.
3. on-line measurement device of split-phase combustion concentration of pulverized coal in power plant as claimed in claim 2 is characterized in that described potsherd is made by alumina material.
4. on-line measurement device of split-phase combustion concentration of pulverized coal in power plant as claimed in claim 3 is characterized in that, described metal electrode is to adopt molybdenum manganese metal technology that molybdenum manganese powder sintering is plated one deck nickel again on ceramic matrix to form.
5. on-line measurement device of split-phase combustion concentration of pulverized coal in power plant as claimed in claim 1, it is characterized in that, three of comprising of described dense-and-weak separator laterally are spacedly distributed at the separating plate of segregation section, the rotating shaft that each separating plate is provided with by the rectangular duct bottom connects a motor, and this motor is controlled by the controller and can drives this separating plate original position deflection 60 degree.
6. split-phase combustion concentration of pulverized coal in power plant On-Line Control Method, this method is based on the described on-line measurement device of split-phase combustion concentration of pulverized coal in power plant realization of claim 1, comprise the steps: by being installed in a pair of wall sensor in light phase and two passageways of concentrated phase, gather the interelectrode capacitance of described passageway wall sensor metal respectively and be input to single-chip microcomputer, this capacitance has reflected the concentration parameter of the coal dust firing in dense, the light phase passageway of flowing through; Single-chip microcomputer carries out data to the signal of the coal dust firing concentration parameter that collects dense, the light phase of reflection passageway to be handled, and compare or calculate with predefined normal concentration parameter, output control parameter is to controller then, carry out signal by controller output at last and send into dense-and-weak separator, dense-and-weak separator changes the concentration of the coal dust firing in dense, light phase passageway, thereby realizes the control accurately in real time to the deep or light phase of pulverized coal channel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101571488A CN101832577B (en) | 2010-04-27 | 2010-04-27 | On-line measurement device of split-phase combustion concentration of pulverized coal in power plant and control method |
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| CN2010101571488A CN101832577B (en) | 2010-04-27 | 2010-04-27 | On-line measurement device of split-phase combustion concentration of pulverized coal in power plant and control method |
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| CN101832577B CN101832577B (en) | 2011-07-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507668A (en) * | 2011-10-28 | 2012-06-20 | 中国矿业大学(北京) | Capacitance type concentrator flocculating setting detection and analysis system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006275320A (en) * | 2005-03-28 | 2006-10-12 | Chugoku Electric Power Co Inc:The | Coal/liquid fuel switching-operation method and system in thermal power system |
| EP1906092A1 (en) * | 2006-09-30 | 2008-04-02 | Powitec Intelligent Technologies GmbH | Method for controlling a combustion process |
| CN101266044A (en) * | 2008-04-08 | 2008-09-17 | 西安交通大学 | Method and apparatus for distinguishing coal-burning boiler coal fines timely degree property |
| US20090274985A1 (en) * | 2006-11-17 | 2009-11-05 | Mcknight James K | Powdered fuel conversion systems and methods |
| CN201697157U (en) * | 2010-05-05 | 2011-01-05 | 西安交通大学 | Split-phase burning concentration online measuring device of powdered coal in power plant |
-
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- 2010-04-27 CN CN2010101571488A patent/CN101832577B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006275320A (en) * | 2005-03-28 | 2006-10-12 | Chugoku Electric Power Co Inc:The | Coal/liquid fuel switching-operation method and system in thermal power system |
| EP1906092A1 (en) * | 2006-09-30 | 2008-04-02 | Powitec Intelligent Technologies GmbH | Method for controlling a combustion process |
| US20090274985A1 (en) * | 2006-11-17 | 2009-11-05 | Mcknight James K | Powdered fuel conversion systems and methods |
| CN101266044A (en) * | 2008-04-08 | 2008-09-17 | 西安交通大学 | Method and apparatus for distinguishing coal-burning boiler coal fines timely degree property |
| CN201697157U (en) * | 2010-05-05 | 2011-01-05 | 西安交通大学 | Split-phase burning concentration online measuring device of powdered coal in power plant |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507668A (en) * | 2011-10-28 | 2012-06-20 | 中国矿业大学(北京) | Capacitance type concentrator flocculating setting detection and analysis system |
| CN102507668B (en) * | 2011-10-28 | 2013-08-21 | 中国矿业大学(北京) | Capacitance type concentrator flocculating setting detection and analysis system |
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