CN103018417A - Boiler water quality detection device based on flow injection analysis and soft-measuring technology - Google Patents
Boiler water quality detection device based on flow injection analysis and soft-measuring technology Download PDFInfo
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- CN103018417A CN103018417A CN201210536923XA CN201210536923A CN103018417A CN 103018417 A CN103018417 A CN 103018417A CN 201210536923X A CN201210536923X A CN 201210536923XA CN 201210536923 A CN201210536923 A CN 201210536923A CN 103018417 A CN103018417 A CN 103018417A
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Abstract
The invention relates to a boiler water quality detection device based on flow injection analysis and a soft-measuring technology. A distilled water container, a boiler water sample solution container and a standard acid solution container are respectively connected with a 16-way valve through a hose; the 16-way valve is orderly connected with a peristaltic pump, a 26-way valve, a conductivity electrode, a pH electrode, and a chloride ion electrode through the hose; the chloride ion electrode is connected with a liquid waste cup; and a central control system is connected with the 16-way valve, the peristaltic pump, the 26-way valve, the conductivity electrode, the pH electrode and the chloride ion electrode respectively. Signals of the conductivity electrode, the pH electrode and the chloride ion electrode in a flow injection analysis system are collected through a central data processing system to determine a plurality of water quality parameters such as water conductivity of the boiler, pH value, and chloride ion concentration; a voltage value signal can be measured by the boiler water quality detection device according to the pH electrode; and rapid and effective measurement on total alkalinity of boiler water can be achieved by the soft-measuring technology at the same time.
Description
Technical field
The present invention relates to a kind of water quality detecting device, especially relate to the on-line measurement device of boiler water conductivity, pH value, chlorine ion concentration and boiler water total alkalinity, belong to the water quality inspection technique field.
Background technology
Boiler provides the necessary heat energy of production run and steam as the most important heat-exchange device of industrial enterprise, and the quality of water in the boiler water-steam system is one of key factor that affects boiler and heat power equipment safety, enterprise energy consumption.In order to guarantee the not situations such as corrosion, fouling and salification of boiler water steam circulation system, boiler water need to pass through strict monitoring water quality, meets national standard to guarantee boiler water quality.The water quality condition of Industrial Boiler has determined the running status of boiler to a great extent, and wherein boiler electrical conductivity of water, pH value, chlorine ion concentration and total alkalinity etc. all are the parameters that often needs detection in the boiler water quality testing process.And in many factors that affects the boiler water quality, wherein suitable boiler water total alkalinity all has great significance to the antiscale of boiler, anticorrosion etc.
Along with the progress of science and technology, some advanced water quality detection equipment also correspondingly are applied to the boiler water quality detection field, such as conductivity meter etc.They have the incomparable advantage of classic method in the boiler water quality context of detection, but a certain the parameter of the mensuration boiler water quality that they all can only be single, and do not have the mensuration that can concentrate other boiler water quality parameter.
Particularly for the context of detection of boiler water total alkalinity, still continue to use the method for traditional manual titration, i.e. indicator titration method in the overwhelming majority's industrial occasions.The used indicator titration method of national sector standard Industrial Boiler water quality specifications GB1576-2008 uses sulfuric acid as standard solution when measuring the boiler water total alkalinity usually, auxiliary with methyl orange and phenolphthalein indicator, principle according to acid-base neutralization, in titration process, judge the terminal point of titration by the variation of judging the mixed solution color, then calculate the total alkalinity of boiler water according to the volume of the standard acid that consumes.These traditional manual titration methods mostly need to constantly pipette the boiler water water sample and carry out quantitative chemical analysis, and these operations are not only loaded down with trivial details time-consuming, and on the links such as judgement of titration end-point some artificial errors of easier introducing.
Therefore designing corresponding boiler water water quality on-line detecting system, not only for the safe operation of boiler and the thermal efficiency of raising boiler the meaning that is not of the common run is arranged, also is national vast boiler user's common aspiration simultaneously.
Summary of the invention
The object of the invention is to overcome above-mentioned weak point, a kind of boiler water quality pick-up unit based on Flow Injection Analysis and soft-measuring technique is provided, this pick-up unit gathers the signal realization of conductance electrode, pH electrode, chlorine ion electrode in the Flow Injection Analysis System to the mensuration of the multiple-quality water parameters such as boiler water conductivity, pH value, chlorine ion concentration by central data processing system, and the voltage value signal that this can obtain according to the pH electrode measurement utilizes soft measurement can realize simultaneously quickly and efficiently mensuration to the boiler water total alkalinity.
According to technical scheme provided by the invention, boiler water quality pick-up unit based on Flow Injection Analysis and soft-measuring technique, comprise distilled water container, boiler water sample solution container, the standard acid container, waste liquid cup, the 10 six-way valve, peristaltic pump, the 20 six-way valve, conductance electrode, pH electrode, chlorine ion electrode, described distilled water container, boiler water sample solution container, the standard acid container is connected with the 10 six-way valve by flexible pipe respectively; The 10 six-way valve is connected with peristaltic pump, the 20 six-way valve, conductance electrode, pH electrode, chlorine ion electrode successively by flexible pipe, and described chlorine ion electrode is connected with the waste liquid cup; Described central control system is connected with the 10 six-way valve, peristaltic pump, the 20 six-way valve, conductance electrode, pH electrode and chlorine ion electrode respectively; Described peristaltic pump and the 10 six-way valve are by the central control system control of Flow Injection Analysis System; Described the 10 six-way valve, the 20 six-way valve are controlled the angle of its rotation by central control system, and central control system draws pH value, chlorine ion concentration and the total alkalinity of boiler water sample solution by the signal that collects.
As a further improvement on the present invention, described the 10 six-way valve comprises stator and rotor, and described stator is provided with eight upper holes of stator; Described rotor is provided with eight the next holes of rotor; Rotor is connected with stator rotation, described eight upper holes of stator and eight corresponding connections in the next hole of rotor.
As a further improvement on the present invention, eight upper holes of stator of the upper Kong Zhongdi of wherein said eight stators link to each other with distilled water container, the upper hole of first stator links to each other with boiler water sample solution container, and second upper hole of stator links to each other with the standard acid container; The next hole of first rotor links to each other with peristaltic pump in eight the next holes of rotor.
As a further improvement on the present invention, described the 20 six-way valve comprises stator and rotor, and described stator is provided with eight upper holes of stator; Described rotor is provided with eight the next holes of rotor; Rotor is connected with stator rotation, described eight upper holes of stator and eight corresponding connections in the next hole of rotor.
As a further improvement on the present invention, the upper hole of first stator links to each other with peristaltic pump in wherein said eight upper holes of stator, and the 5th the upper hole of stator links to each other with conductance electrode; Five the next holes of rotor of the next Kong Yudi of first rotor link to each other in eight the next holes of rotor, and six the next holes of rotor of second the next Kong Yudi of rotor link to each other.
As a further improvement on the present invention, the boiler water quality parameter of described detection comprises conductivity, pH value, chlorine ion concentration and total alkalinity.
As a further improvement on the present invention, described standard acid container Plays acid solution is selected the hydrochloric acid solution of 0.001mol/L.
Compared with the prior art the present invention has the following advantages:
The present invention measures when realizing multiple-quality water parameters such as boiler water conductivity, pH value, chlorions by Flow Injection Analysis System, detect especially the detection of analysis, boiler water total alkalinity for boiler water quality, utilize the soft-measuring technique realization to the fast and effectively detection of boiler water total alkalinity on the basis of Flow Injection Analysis; Avoided loaded down with trivial details manual titration's process, improved accuracy of detection, the safe operation of boiler and the raising of the thermal efficiency have all been had great significance.
Description of drawings
Fig. 1 is system's connection layout of specific embodiments of the invention.
Fig. 2 is the stator structure synoptic diagram of the 10 six-way valve.
Fig. 3 is the rotor structure synoptic diagram of the 10 six-way valve.
Fig. 4 is stator, the rotor assembling structural representation of the 10 six-way valve.
Fig. 5 is the stator structure synoptic diagram of the 20 six-way valve.
Fig. 6 is the rotor structure synoptic diagram of the 20 six-way valve.
Fig. 7 is stator, the rotor assembling structural representation of the 20 six-way valve.
Fig. 8 is the central control system connection diagram.
Fig. 9 is for measuring the curve of conductivity in the boiler water sample solution.
Figure 10 is for measuring the curve of pH value in the boiler water sample solution.
Figure 11 is for measuring the curve of chlorine ion concentration in the boiler water sample solution.
Figure 12 is for measuring the FIA peak curve of total alkalinity in the boiler water sample solution.
Embodiment
Following the present invention is further described in connection with the embodiment in the accompanying drawing:
Such as Fig. 1～shown in Figure 7, comprise distilled water container 1, boiler water sample solution container 2, standard acid container 3, waste liquid cup 4, the 10 six-way valve 5, peristaltic pump 6, the 20 six-way valve 7, conductance electrode 8, pH electrode 9, chlorine ion electrode 10.Described distilled water container 1, boiler water sample solution container 2, standard acid container 3 are connected with the 10 six-way valve 5 by flexible pipe respectively; The 10 six-way valve 5 is connected with peristaltic pump 6, the 20 six-way valve 7, conductance electrode 8, pH electrode 9, chlorine ion electrode 10 successively by flexible pipe, and described chlorine ion electrode 10 is connected with waste liquid cup 4; Described central control system 11 is connected with the 10 six-way valve 5, peristaltic pump 6, the 20 six-way valve 7, conductance electrode 8, pH electrode 9 and chlorine ion electrode 10 respectively; Described peristaltic pump 6 and the 10 six-way valve 5 are by central control system 11 controls of Flow Injection Analysis System; Described the 10 six-way valve 5, the 20 six-way valve 7 are by central control system 11 its angles that turn over of control.Central control system 11 draws pH value, chlorine ion concentration and the total alkalinity of boiler water sample solution by the signal that collects.
1 Inner of distilled water container described in the present invention is equipped with distilled water, described boiler water sample solution container 2 Inner are equipped with the boiler water sample solution, described standard acid container 3 Inner are equipped with standard acid, and described standard acid container 3 Plays acid solutions are selected the hydrochloric acid solution of 0.001mol/L.
Such as Fig. 2～shown in Figure 4, described the 10 six-way valve 5 comprises stator 5-1 and rotor 5-2, and described stator 5-1 and rotor 5-2 connect by rotating shaft.Described stator 5-1 is provided with 8 upper holes of stator, is respectively the upper hole 5-11 of the first stator, the upper hole 5-12 of the second stator, the upper hole 5-13 of the 3rd stator, the upper hole 5-14 of the 4th stator, the upper hole 5-15 of the 5th stator, the upper hole 5-16 of the 6th stator, the upper hole 5-17 of the 7th stator, the upper hole 5-18 of the 8th stator; Described rotor 5-2 is provided with 8 the next holes of rotor, is respectively the next hole 5-21 of the first rotor, the next hole 5-22 of the second rotor, the next hole 5-23 of third trochanter, the next hole 5-24 of fourth trochanter, the next hole 5-25 of the 5th rotor, the next hole 5-26 of the 6th rotor, the next hole 5-27 of the 7th rotor, the next hole 5-28 of the 8th rotor; Rotor 5-2 and stator 5-1 are rotationally connected, and are characterized in: where rotor 5-2 is no matter turn to, and 8 upper holes of stator are communicated with in the hole between the corresponding hole up and down with 8 the next holes of rotor.The upper hole 5-18 of eight stators of the upper Kong Zhongdi of wherein said 8 stators links to each other with distilled water container 1, and the upper hole 5-11 of first stator links to each other with boiler water sample solution container 2, and second upper hole 5-12 of stator links to each other with standard acid container 3; The next hole 5-21 of first rotor links to each other with peristaltic pump 6 in 8 the next holes of rotor.
Such as Fig. 5～shown in Figure 7, described the 20 six-way valve 7 comprises stator 7-1 and rotor 7-2, and described stator 7-1 and rotor 7-2 connect by rotating shaft.Described stator is provided with 8 upper holes of stator, is respectively the upper hole 7-11 of the first stator, the upper hole 7-12 of the second stator, the upper hole 7-13 of the 3rd stator, the upper hole 7-14 of the 4th stator, the upper hole 7-15 of the 5th stator, the upper hole 7-16 of the 6th stator, the upper hole 7-17 of the 7th stator, the upper hole 7-18 of the 8th stator; Described rotor 7-2 is provided with 8 the next holes of rotor, is respectively the next hole 7-21 of the first rotor, the next hole 7-22 of the second rotor, the next hole 7-23 of third trochanter, the next hole 7-24 of fourth trochanter, the next hole 7-25 of the 5th rotor, the next hole 7-26 of the 6th rotor, the next hole 7-27 of the 7th rotor, the next hole 7-28 of the 8th rotor; Rotor 7-21 and stator 7-11 are rotationally connected, and are characterized in: where rotor 7-2 no matter turn to, 8 upper holes of stator and 8 corresponding connections in the next hole of rotor.The upper hole 7-11 of first stator links to each other with peristaltic pump 6 in wherein said 8 upper holes of stator, and the 5th the upper hole 7-15 of stator links to each other with conductance electrode 8; The next hole 7-21 of first rotor links to each other with the 5th the next hole 7-25 of rotor in 8 the next holes of rotor, and second the next hole 7-22 of rotor links to each other with the 6th the next hole 7-26 of rotor.
As shown in Figure 8
,The control signal that the center-control data handling system sends by host computer, data bus, difference control step motor, peristaltic pump, control the 10 six-way valve 5 and the 20 six-way valve 7, by conductance electrode 8, pH electrode 9, chlorine ion electrode 10 respectively signals collecting be sent to serial ports.
Described the 10 six-way valve 5, the 20 six-way valve 7 are moved the automatic switchover of operation valve by Driving Stepping Motor by central control system.The lower computer system of ten six-way valve control system is made of the single-chip minimum system of design, and single-chip minimum system mainly comprises one-chip computer module, stepper motor module, serial communication modular and power module etc.System chooses the propulsion system that four phase five-wire type stepping motors rotate as ten six-way valve rotors, and stepper motor is driven by Single Chip Microcomputer (SCM) system, and single-chip microcomputer adopts the mode of four phase eight beat to come Driving Stepping Motor.Be burned onto single-chip microcomputer control program and mainly comprise stepper motor driver module and serial communication modular.Utilize the Step-by-step Motor Device Driver of C language compilation specifically to comprise motor positive and inverse control, rotational angle control etc.Because being used for the valve of ten six-way valves, designed system automaticallyes switch, so the angle that designed system turns over is 45 degree at every turn.Utilize the serial communication program of C language compilation to adopt inquiry mode, and regulation serial communication data packet format, specifically comprise data start bit, significance bit, stop bit etc.Program is still reversed then Driving Stepping Motor action according to the data significance bit judgement motor forward that reads.
Such as Fig. 9～shown in Figure 12, using method of the present invention is as follows: at first, start peristaltic pump 6 by central control system 11, and it is 100 rev/mins with its speed setting, the 10 six-way valve 5 is in the upper hole of the 8th stator under original state, both peristaltic pump 6 drove forwards the speed of distilled water with per minute 11.25ml/min, and this process continues about 1 minute, and fundamental purpose is detergent line.
Secondly, central control system 11 makes the 10 six-way valve 5 turn over clockwise 45 degree, make it be in the upper hole of the 8th stator, meanwhile the rotating speed with peristaltic pump 6 drops to 40 rev/mins, and namely peristaltic pump 6 drives forwards the speed of boiler water sample solution with 4.5ml/min.Be full of whole pipeline through boiler water sample solution after a while by the pipeline that five the next holes of rotor of the next Kong Yudi of first rotor of the 20 six-way valve 7 link to each other, when the boiler water sample solution is flowed through conductance electrode 8, the conductivity of conductance electrode 8 meeting rapid test boiler water sample solutions, the signal that the while central data processing system sends by gathering it is through calculating accordingly the conductivity of boiler water sample solution.In like manner, when the boiler water sample solution was flowed through pH electrode 9, chlorine ion electrode 10, central control system drew the pH value of boiler water sample solution and chlorine ion concentration by the signal that collects.
Then, central control system 11 controls the 10 six-way valve 5 turns over 45 degree again clockwise, makes it be in second the next hole of rotor, and this moment, peristaltic pump pumps concentration was the standard salt acid solution of 0.001mol/L, and the rotating speed of peristaltic pump maintains 40 rev/mins.Simultaneously, central control system 11 control the 20 six-way valve 7 turns over 45 degree equally clockwise, and standard acid is full of whole pipeline by the pipeline in six the next holes of rotor of the next Kong Yudi of second rotor of the 20 six-way valve 7 after after a while.Central control system makes the 20 six-way valve 7 turn over counterclockwise 45 degree more afterwards, return to original location status, at this moment, remain in boiler water sample solution in five the next holes of rotor of the next Kong Yudi of first rotor pipeline of the 20 six-way valve 7 hybrid reaction with it under the driving of current-carrying hydrochloric acid, when mixed solution is flowed through the pH electrode, the magnitude of voltage of pH electrode meeting rapid test mixed solution each point, experimental result show that the pH electrode is with the magnitude of voltage of the form record mixed solution each point at FIA peak.
At last, utilize the present invention that the boiler water sample solution of 50 groups of different basicity is measured its FIA spike shape.The present invention utilizes the foundation of Partial Least Square Support Vector Machine method about the predictive equation of the boiler water total alkalinity of mixed solution magnitude of voltage at first according to magnitude of voltage and the corresponding boiler water total alkalinity thereof of 50 groups of boiler water sample solutions measuring.When the present invention is determined at the boiler water sample solution of unknown total alkalinity, central control system 11 is the magnitude of voltage of the each point by gathering the mixed solution that the pH electrode measurement obtains at first, then calculates the total alkalinity of boiler water sample solution according to what set up in advance about the boiler water total alkalinity equation of mixed solution magnitude of voltage.
Thus, realize the fast and effeciently mensuration to the boiler water quality many kinds of parameters, these parameters comprise conductivity, pH value, chlorine ion concentration and total alkalinity.
Claims (7)
1. boiler water quality pick-up unit based on Flow Injection Analysis and soft-measuring technique, it is characterized in that: comprise distilled water container (1), boiler water sample solution container (2), standard acid container (3), waste liquid cup (4), the 10 six-way valve (5), peristaltic pump (6), the 20 six-way valve (7), conductance electrode (8), pH electrode (9), chlorine ion electrode (10), described distilled water container (1), boiler water sample solution container (2), standard acid container (3) is connected with the 10 six-way valve (5) by flexible pipe respectively; The 10 six-way valve (5) is connected with peristaltic pump (6), the 20 six-way valve (7), conductance electrode (8), pH electrode (9), chlorine ion electrode (10) successively by flexible pipe, and described chlorine ion electrode (10) is connected with waste liquid cup (4); Described central control system (11) is connected with the 10 six-way valve (5), peristaltic pump (6), the 20 six-way valve (7), conductance electrode (8), pH electrode (9) and chlorine ion electrode (10) respectively; Described peristaltic pump (6) and the 10 six-way valve (5) are by central control system (11) control of Flow Injection Analysis System; Described the 10 six-way valve (5), the 20 six-way valve (7) are controlled its rotational angle by central control system (11), and central control system (11) draws pH value, chlorine ion concentration and the total alkalinity of boiler water sample solution by the signal that collects.
2. the boiler water quality pick-up unit based on Flow Injection Analysis and soft-measuring technique as claimed in claim 1, described the 10 six-way valve (5) comprises stator (5-1) and rotor (5-2), described stator (5-1) is provided with eight upper holes of stator; Described rotor (5-2) is provided with eight the next holes of rotor; Rotor (5-2) is rotationally connected described eight upper holes of stator and eight corresponding connections in the next hole of rotor with stator (5-1).
3. the boiler water quality pick-up unit based on Flow Injection Analysis and soft-measuring technique as claimed in claim 2, described eight stators, eight upper holes of stator of upper Kong Zhongdi (5-18) link to each other with distilled water container (1), the upper hole of first stator (5-11) links to each other with boiler water sample solution container (2), and second upper hole of stator (5-12) links to each other with standard acid container (3).
4. the boiler water quality pick-up unit based on Flow Injection Analysis and soft-measuring technique as claimed in claim 2, the next hole of first rotor (5-21) links to each other with peristaltic pump (6) in described eight the next holes of rotor.
5. the boiler water quality pick-up unit based on Flow Injection Analysis and soft-measuring technique as claimed in claim 1, described the 20 six-way valve (7) comprises stator (7-1) and rotor (7-2), described stator (7-1) is provided with eight upper holes of stator; Described rotor (7-2) is provided with eight the next holes of rotor; Rotor (7-2) is rotationally connected described eight upper holes of stator and eight corresponding connections in the next hole of rotor with stator (7-1).
6. the boiler water quality pick-up unit based on Flow Injection Analysis and soft-measuring technique as claimed in claim 5, the upper hole of first stator (7-11) links to each other with peristaltic pump (6) in described eight upper holes of stator, and the 5th the upper hole of stator (7-15) links to each other with conductance electrode (8).
7. the boiler water quality pick-up unit based on Flow Injection Analysis and soft-measuring technique as claimed in claim 5, its feature: the next hole of first rotor (7-21) links to each other with the 5th the next hole of rotor (7-25) in described eight the next holes of rotor, and second the next hole of rotor (7-22) links to each other with the 6th the next hole of rotor (7-26).
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| CN104101722A (en) * | 2014-07-15 | 2014-10-15 | 广州特种承压设备检测研究院 | Multi-object continuous automatic analysis device and method for industrial boiler water quality detection |
| CN103941030B (en) * | 2014-03-26 | 2015-04-22 | 河北先河环保科技股份有限公司 | Sequential-injection cylindrical storage apparatus for reagents |
| CN107321160A (en) * | 2017-08-03 | 2017-11-07 | 国网安徽省电力公司电力科学研究院 | Sulfur hexafluoride gas middle acid substance absorption plant |
| CN107356464A (en) * | 2017-08-03 | 2017-11-17 | 国网安徽省电力公司电力科学研究院 | Hydrolyzable Absorption of Fluoride device in sulfur hexafluoride gas |
| CN107699481A (en) * | 2017-09-26 | 2018-02-16 | 河海大学 | The devices and methods therefor of hydrolysis of urea bacterium overall process activity is determined in a kind of microorganism cure test |
| CN116538494A (en) * | 2023-05-09 | 2023-08-04 | 广州高远达新能源科技股份有限公司 | Boiler water quality dynamic automatic monitoring and pollution discharge feedback control system |
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| CN107699481B (en) * | 2017-09-26 | 2023-11-07 | 河海大学 | Device and method for measuring overall process activity of urea-hydrolyzing bacteria in microbial solidification experiment |
| CN116538494A (en) * | 2023-05-09 | 2023-08-04 | 广州高远达新能源科技股份有限公司 | Boiler water quality dynamic automatic monitoring and pollution discharge feedback control system |
| CN116538494B (en) * | 2023-05-09 | 2023-12-15 | 广州高远达新能源科技股份有限公司 | Boiler water quality dynamic automatic monitoring and pollution discharge feedback control system |
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