CN102226757A - Spectral analysis on-line detector for boiler dryness - Google Patents
Spectral analysis on-line detector for boiler dryness Download PDFInfo
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- CN102226757A CN102226757A CN 201110084006 CN201110084006A CN102226757A CN 102226757 A CN102226757 A CN 102226757A CN 201110084006 CN201110084006 CN 201110084006 CN 201110084006 A CN201110084006 A CN 201110084006A CN 102226757 A CN102226757 A CN 102226757A
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Abstract
The invention belongs to the technical field of on-line detection, and relates to a spectral analysis on-line detector for boiler dryness. The on-line detector comprises a proportioning pump 1, a proportioning pump 2, a proportioning pump 3, a container 1, a container 2, a container 3, a water pump1, a water pump 2, a sample container, a burette 1, a burette 2, a burette 3, a luminous tube, a photoelectric tube, a controlling system, and a water tank. The controlling system comprises a PLC, a display, a relay coil and a contactor coil. The display, the relay coil and the contactor coil are all connected to the PLC. The on-line detector has advantages that: the on-line detector is designed in a dynamo-electric integrated structure, and is controlled by a PLC. With the on-line detector, automatic titration and intelligent analysis can be realized. An integrated precise exchanging unit is adopted in a titration apparatus, and spectral analysis is employed, such that relatively high detection precision can be achieved while the detection is ensured to be operating stably in a long-term. Therefore, on-line detection of steam dryness can be realized.
Description
Technical field
The invention belongs to the online measuring technique field, particularly a kind of boiler mass dryness fraction spectral analysis on-line detector.
Background technology
Patent " boiler steam dryness is test and control method (application number 00102548.1) automatically " discloses a kind of boiler steam dryness automatic test and control method of measuring feedwater conductivity and stove water conductivity by the conductivity test probe.Its shortcoming is the passing along with online detection time, and detecting head is polluted, and accuracy of detection can reduce gradually.Therefore need often to clean or change detecting head, so just influenced the work efficiency of online detection.
Summary of the invention
For overcoming the defective that said method exists, the present invention proposes a kind of boiler mass dryness fraction spectral analysis on-line detector.
This on-line detector comprises fixed displacement pump 1, fixed displacement pump 2, fixed displacement pump 3, container 1, container 2, container 3, water pump 1, water pump 2, sample cup, buret 1, buret 2, buret 3, luminotron, photoelectric tube, control system, pond and sample cup; Control system comprises PLC, display, relay coil and contactor coil; Display, relay coil and contactor coil all are connected PLC;
The power end of fixed displacement pump 1 connects PLC, and the liquid outlet of fixed displacement pump 1 and buret 1 join, container 1 be positioned at fixed displacement pump 1 under; The power end of fixed displacement pump 2 connects PLC, and the liquid outlet of fixed displacement pump 2 and buret 2 join, container 2 be positioned at fixed displacement pump 2 under; The power end of fixed displacement pump 3 and water pump 2 all is connected PLC, and the pond is positioned at the below of fixed displacement pump 3, and the pond is connected with water pump 2 by pipeline, and water pump 2 joins with the liquid outlet and the buret 3 of fixed displacement pump 3; The lower end of buret 1, buret 2 and buret 3 is all immersed in the sample cup, and luminotron is connected PLC respectively with photoelectric tube, and luminotron and photoelectric tube lay respectively at the both sides of sample cup, and it is corresponding mutually, water pump 1 one ends connect PLC, and the other end connects sample cup, container 3 be positioned at water pump 1 under.
Fixed displacement pump and water pump are all from translator among the present invention, and wherein fixed displacement pump is a stepper motor from translator.
Adopt this boiler mass dryness fraction spectral analysis on-line detector to carry out on-line detection method, comprise the steps:
Step 1, closed power switch, power light is bright;
Step 2, relay coil get electric, the normally opened contact closure, and contactor coil gets electric, the normally opened contact closure;
Step 3, light emitting diode work;
Step 4, motor rotation drive water pump 2 and inject stove water to buret 3;
Whether step 5, the stove water that judge to inject less than 50ml, if, execution in step four, if not, execution in step six;
Step 6, motor rotation drive the liquid that water pump 1 is discharged in the sample cup;
Step 7, whether judge the draining number of times less than 5 times, if, execution in step four, if not, execution in step eight;
Step 8, stepper motor drive fixed displacement pump 1 to buret 1 injection stove water;
Step 9, stepper motor drive fixed displacement pump 2 to buret 2 titration methyl orange solutions;
Step 10, stepper motor drive fixed displacement pump 3 to buret 3 titration sulfuric acid;
The signal of step 11, the output of recording light Absorbing Sensor;
Step 10 six, end.
Advantage of the present invention: adopt the electromechanical integrated structure design,, realize titration process robotization and intellectual analysis by PLC control.Titration apparatus adopts integrated accurate crosspoint, cooperates spectral analysis, and detector has the higher detection precision in the long-term stability operation, realize the online detection to steam quality.
Description of drawings
Fig. 1 is a boiler mass dryness fraction spectral analysis on-line detector structural representation of the present invention;
Fig. 2 is this on-line detection method process flow diagram of the present invention;
Fig. 3 is a contactor work electric shock interface synoptic diagram of the present invention;
Fig. 4 is a relay work electric shock interface synoptic diagram of the present invention;
Fig. 5 is a dryness measurement result schematic diagram of the present invention;
Among the figure: 1, fixed displacement pump 1,2, container 1,3, fixed displacement pump 2,4, container 2,5, water pump 2,6, fixed displacement pump 3,7, pond, 8, buret 2,9, buret 1,10, buret 3,11 luminotrons, 12, photoelectric tube, 13, control system, 14, water pump 1,15, container 3,16, sample cup.
Embodiment
Below in conjunction with accompanying drawing, subordinate list and embodiment the present invention is described in further detail.
As shown in Figure 1, this on-line detector comprises fixed displacement pump 1, fixed displacement pump 2, fixed displacement pump 3, container 1, container 2, container 3, water pump 1, water pump 2, sample cup, buret 1, buret 2, buret 3, luminotron, photoelectric tube, control system, pond and sample cup; Control system comprises PLC, display, relay coil and contactor coil; Display, relay coil and contactor coil all are connected PLC, shown in Fig. 3 and 4;
The power end of fixed displacement pump 1 connects PLC, and the liquid outlet of fixed displacement pump 1 and buret 1 join, container 1 be positioned at fixed displacement pump 1 under; The power end of fixed displacement pump 2 connects PLC, and the liquid outlet of fixed displacement pump 2 and buret 2 join, container 2 be positioned at fixed displacement pump 2 under; The power end of fixed displacement pump 3 and water pump 2 all is connected PLC, and the pond is positioned at the below of fixed displacement pump 3, and the pond is connected with water pump 2 by pipeline, and water pump 2 joins with the liquid outlet and the buret 3 of fixed displacement pump 3; The lower end of buret 1, buret 2 and buret 3 is all immersed in the sample cup, and luminotron is connected PLC respectively with photoelectric tube, and luminotron and photoelectric tube lay respectively at the both sides of sample cup, and it is corresponding mutually, water pump 1 one ends connect PLC, and the other end connects sample cup, container 3 be positioned at water pump 1 under.
Fixed displacement pump and water pump are all from translator among the present invention, and wherein fixed displacement pump is a stepper motor from translator.
Adopt this boiler mass dryness fraction spectral analysis on-line detector to carry out on-line detection method, comprise the steps: as shown in Figure 2,
Step 1, closed power switch, power light is bright;
Step 2, relay coil KA11-77 get electric, normally opened contact KA1-7 closure, and contactor coil KM11-77 gets electric, normally opened contact KM1-7 closure;
Step 3, luminotron work;
Step 4, motor rotation drive water pump 2 to buret 3 steam in jection condensate water 50mL;
Whether step 5, the steam condensate (SC) that judge to inject less than 50ml, if, execution in step four, if not, execution in step six;
Step 6, motor rotation drive the liquid that water pump 1 is discharged in the sample cup;
Step 7, whether judge the draining number of times less than 5 times, if, execution in step four, if not, execution in step eight;
Step 8, stepper motor drive fixed displacement pump 1 and inject 20ml steam condensate (SC) at least to buret 1;
Step 9, stepper motor drive fixed displacement pump 2 and take out 1 ‰ methyl orange solutions at least 3 about 0.15ml of buret 2 titration from container 2, stir, solution colour becomes purple in the test sample cup in titration process, before the detection, at first adjust the knob on the luminotron, determine the wavelength and the light intensity of incident;
Step 10, stepper motor drive fixed displacement pump 3 and take out 0.05% sulfuric acid solution 10-15ml to buret 3 titration from container 3;
The signal of step 11, the output of recording light Absorbing Sensor; The variation of the solution quality that injects according to fixed displacement pump makes the light through sample cup take place to change continuously, adopts the wavelength variations of photoelectric tube record light, and track record shows the adding quality of liquid, and record transmitted light wavelength-time changing curve;
Wherein stove water sulfuric acid titer is 15ml, and unboiled water sulfuric acid titer is 4.2ml, according to the mass dryness fraction computing formula
(15ml-4.2ml)/15ml*100％＝72％
Obtaining mass dryness fraction is 72%;
Step 10 six, end.
As shown in Figure 5.Q0 wherein: show the reagent initial value; Q1: the value when apparent reagent stops titration; P is a flex point
After this curve begins to present level and moves towards feature, stop to add and show liquid, according to the addition that shows liquid with the wavelength of light data when finally stopping, then can be by inquiring the steam quality data in the database automatically.After detecting end, water pump 2 will detect medium automatically and be drawn in the container 3, finish this detection, and system begins to detect preparation next time.
Claims (2)
1. boiler mass dryness fraction spectral analysis on-line detector is characterized in that:
This on-line detector comprises fixed displacement pump 1, fixed displacement pump 2, fixed displacement pump 3, container 1, container 2, container 3, water pump 1, water pump 2, sample cup, buret 1, buret 2, buret 3, luminotron, photoelectric tube, control system, pond and sample cup; Control system comprises PLC, display, relay coil and contactor coil; Display, relay coil and contactor coil all are connected PLC;
The power end of fixed displacement pump 1 connects PLC, and the liquid outlet of fixed displacement pump 1 and buret 1 join, container 1 be positioned at fixed displacement pump 1 under; The power end of fixed displacement pump 2 connects PLC, and the liquid outlet of fixed displacement pump 2 and buret 2 join, container 2 be positioned at fixed displacement pump 2 under; The power end of fixed displacement pump 3 and water pump 2 all is connected PLC, and the pond is positioned at the below of fixed displacement pump 3, and the pond is connected with water pump 2 by pipeline, and water pump 2 joins with the liquid outlet and the buret 3 of fixed displacement pump 3; The lower end of buret 1, buret 2 and buret 3 is all immersed in the sample cup, and luminotron is connected PLC respectively with photoelectric tube, and luminotron and photoelectric tube lay respectively at the both sides of sample cup, and it is corresponding mutually, water pump 1 one ends connect PLC, and the other end connects sample cup, container 3 be positioned at water pump 1 under.
2. adopt the described boiler mass dryness fraction of claim 1 spectral analysis on-line detector to carry out on-line detection method, it is characterized in that: comprise the steps:
Step 1, closed power switch, power light is bright;
Step 2, relay coil get electric, the normally opened contact closure, and contactor coil gets electric, the normally opened contact closure;
Step 3, light emitting diode work;
Step 4, motor rotation drive water pump 2 and inject stove water to buret 3;
Whether step 5, the stove water that judge to inject less than 50ml, if, execution in step four, if not, execution in step six;
Step 6, motor rotation drive the liquid that water pump 1 is discharged in the sample cup;
Step 7, whether judge the draining number of times less than 5 times, if, execution in step four, if not, execution in step eight;
Step 8, stepper motor drive fixed displacement pump 1 to buret 1 injection stove water;
Step 9, stepper motor drive fixed displacement pump 2 to buret 2 titration methyl orange solutions;
Step 10, stepper motor drive fixed displacement pump 3 to buret 3 titration sulfuric acid;
The signal of step 11, the output of recording light Absorbing Sensor;
Step 12, judge whether voltage is steady, if, execution in step 13; If not, execution in step nine;
Step 13, drafting sulfuric acid titer and voltage signal relation curve;
Step 14, on curve, search flex point P, draw the titer of sulfuric acid;
Step 15, calculate mass dryness fraction according to the mass dryness fraction computing formula;
Step 10 six, end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110084006A CN102226757B (en) | 2011-04-02 | 2011-04-02 | Spectral analysis on-line detector for boiler dryness |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110084006A CN102226757B (en) | 2011-04-02 | 2011-04-02 | Spectral analysis on-line detector for boiler dryness |
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| CN102226757A true CN102226757A (en) | 2011-10-26 |
| CN102226757B CN102226757B (en) | 2012-10-03 |
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| CN201110084006A Expired - Fee Related CN102226757B (en) | 2011-04-02 | 2011-04-02 | Spectral analysis on-line detector for boiler dryness |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743740A (en) * | 2013-12-30 | 2014-04-23 | 中国石油天然气股份有限公司 | Steam dryness test method and device |
| CN105403660A (en) * | 2015-12-16 | 2016-03-16 | 济南海能仪器股份有限公司 | Titration reaction apparatus |
| CN106853382A (en) * | 2017-02-22 | 2017-06-16 | 王飞 | A kind of reaction vessel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1094562C (en) * | 1998-11-23 | 2002-11-20 | 邱金和 | Power unit |
| WO2009021773A2 (en) * | 2007-08-10 | 2009-02-19 | Unilever Plc | Automatic dispenser |
| CN201327468Y (en) * | 2008-12-22 | 2009-10-14 | 厦门福芯微电子科技有限公司 | Steam dryness detecting cavity |
-
2011
- 2011-04-02 CN CN201110084006A patent/CN102226757B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1094562C (en) * | 1998-11-23 | 2002-11-20 | 邱金和 | Power unit |
| WO2009021773A2 (en) * | 2007-08-10 | 2009-02-19 | Unilever Plc | Automatic dispenser |
| CN201327468Y (en) * | 2008-12-22 | 2009-10-14 | 厦门福芯微电子科技有限公司 | Steam dryness detecting cavity |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743740A (en) * | 2013-12-30 | 2014-04-23 | 中国石油天然气股份有限公司 | Steam dryness test method and device |
| CN103743740B (en) * | 2013-12-30 | 2016-04-06 | 中国石油天然气股份有限公司 | Steam quality assay method and device |
| CN105403660A (en) * | 2015-12-16 | 2016-03-16 | 济南海能仪器股份有限公司 | Titration reaction apparatus |
| CN106853382A (en) * | 2017-02-22 | 2017-06-16 | 王飞 | A kind of reaction vessel |
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| Publication number | Publication date |
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| CN102226757B (en) | 2012-10-03 |
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