CN103018417B - Based on the boiler water quality pick-up unit of Flow Injection Analysis and soft-measuring technique - Google Patents
Based on the boiler water quality pick-up unit of Flow Injection Analysis and soft-measuring technique Download PDFInfo
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- CN103018417B CN103018417B CN201210536923.XA CN201210536923A CN103018417B CN 103018417 B CN103018417 B CN 103018417B CN 201210536923 A CN201210536923 A CN 201210536923A CN 103018417 B CN103018417 B CN 103018417B
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Abstract
The present invention relates to a kind of boiler water quality pick-up unit based on Flow Injection Analysis and soft-measuring technique, it mainly adopts distilled water container, boiler water sample solution container, standard acid container to be connected with the 10 six-way valve respectively by flexible pipe; 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 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.The present invention gathers the mensuration of signal realization to multiple-quality water parameters such as boiler water conductivity, pH value, chlorine ion concentrations of conductance electrode, pH electrode, chlorine ion electrode in Flow Injection Analysis System by central data processing system, and the voltage value signal that this invention can obtain according to pH electrode measurement, utilize the mensuration quickly and efficiently that soft-measuring technique can realize boiler water total alkalinity simultaneously.
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 water quality inspection technique field.
Background technology
Boiler, as the most important heat-exchange device of industrial enterprise, provides the necessary heat energy of production run and steam, the quality of water in boiler water-steam system, is one of the key factor affecting boiler and heat power equipment safety, enterprise energy consumption.In order to ensure that the situation such as corrosion and scaling and salification does not occur boiler water steam circulation system, boiler water needs through strict monitoring water quality, to ensure that boiler water quality meets national standard.The water quality condition of Industrial Boiler determines 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. are all the parameters often needing in boiler water quality testing process to detect.And affecting in boiler water product qualitative factor many, the antiscale, anticorrosion etc. of wherein suitable boiler water total alkalinity to boiler all have great significance.
Along with the progress of science and technology, the water quality detection equipment of some advanced persons is also correspondingly applied to boiler water quality detection field, such as conductivity meter etc.The advantage that they have classic method incomparable in boiler water quality context of detection, but a certain item parameter of the mensuration boiler water quality that they all can only be single, and there is no 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 in the industrial occasions of the overwhelming majority, i.e. indicator titration method.National sector standard Industrial Boiler water quality specifications GB1576-2008 indicator titration method used uses sulfuric acid as standard solution when measuring boiler water total alkalinity usually, auxiliary with methyl orange and phenolphthalein indicator, according to the principle of acid-base neutralization, by judging that the change of mixed solution color judges the terminal of titration in titration process, then calculate the total alkalinity of boiler water according to the volume of the standard acid consumed.These traditional manual titration methods need constantly to pipette boiler water water sample to carry out quantitative chemical analysis mostly, and these operations are not only loaded down with trivial details time-consuming, and more easily introduce some artificial errors in the link such as judgement of titration end-point.
Therefore design corresponding boiler water water quality on-line detecting system, not only have for the safe operation of boiler and the thermal efficiency of raising boiler the meaning be not of the common run, be also the common aspiration of national vast boiler user 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 mensuration of signal realization to multiple-quality water parameters such as boiler water conductivity, pH value, chlorine ion concentrations of conductance electrode, pH electrode, chlorine ion electrode in Flow Injection Analysis System by central data processing system, and this voltage value signal that can obtain according to pH electrode measurement, utilize the mensuration quickly and efficiently that hard measurement can realize boiler water total alkalinity simultaneously.
According to technical scheme provided by the invention, based on the boiler water quality pick-up unit of Flow Injection Analysis and soft-measuring technique, comprise distilled water container, boiler water sample solution container, 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, standard acid container is connected with the 10 six-way valve respectively by flexible pipe; 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 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 controlled by the central control system of Flow Injection Analysis System; Described 10 six-way valve, the 20 six-way valve control its angle of rotating by central control system, and central control system draws the pH value of boiler water sample solution, chlorine ion concentration and total alkalinity by the signal collected.
As a further improvement on the present invention, described 10 six-way valve comprises stator and rotor, and described stator is provided with eight upper holes of stator; Described rotor is provided with the next hole of eight rotors; Rotor is connected with stator rotation, the hole corresponding connection the next with eight rotors of described eight upper holes of stator.
As a further improvement on the present invention, wherein said eight upper Kong Zhong of stator, eight upper holes of stator are connected with distilled water container, first upper hole of stator is connected with boiler water sample solution container, and second upper hole of stator is connected with standard acid container; In the next hole of eight rotors, first the next hole of rotor is connected with peristaltic pump.
As a further improvement on the present invention, described 20 six-way valve comprises stator and rotor, and described stator is provided with eight upper holes of stator; Described rotor is provided with the next hole of eight rotors; Rotor is connected with stator rotation, the hole corresponding connection the next with eight rotors of described eight upper holes of stator.
As a further improvement on the present invention, in eight wherein said upper holes of stator, first upper hole of stator is connected with peristaltic pump, and the 5th the upper hole of stator is connected with conductance electrode; In the next hole of eight rotors, first the next hole of the next Kong Yu of rotor five rotors is connected, and second the next hole of the next Kong Yu of rotor six rotors is connected.
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 selects the hydrochloric acid solution of 0.001mol/L.
Compared with the prior art the present invention has the following advantages:
The present invention realizes measuring while the multiple-quality water parameters such as boiler water conductivity, pH value, chlorion by Flow Injection Analysis System, detect the detection of analysis, boiler water total alkalinity especially for boiler water quality, the basis of Flow Injection Analysis utilizes the fast and effectively detection of soft-measuring technique realization to boiler water total alkalinity; Avoid loaded down with trivial details manual titration's process, improve accuracy of detection, the safe operation of boiler and the raising of the thermal efficiency are all had great significance.
Accompanying drawing explanation
Fig. 1 is the system connection layout of specific embodiments of the invention.
Fig. 2 is the stator structure schematic diagram of the 10 six-way valve.
Fig. 3 is the rotor structure schematic 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 schematic diagram of the 20 six-way valve.
Fig. 6 is the rotor structure schematic 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 central control system connection diagram.
Fig. 9 is the curve measuring conductivity in boiler water sample solution.
Figure 10 is the curve measuring pH value in boiler water sample solution.
Figure 11 is the curve measuring chlorine ion concentration in boiler water sample solution.
Figure 12 is the FIA peak curve measuring total alkalinity in boiler water sample solution.
Embodiment
Embodiment in is by reference to the accompanying drawings further described by the present invention below:
As shown in Fig. 1 ~ Fig. 7, comprise distilled water container 1, boiler water sample solution container 2, standard acid container 3, waste liquid cup the 4, the 10 six-way valve 5, peristaltic pump the 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 respectively by flexible pipe; 10 six-way valve 5 is connected with peristaltic pump the 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 the 6, the 20 six-way valve 7, conductance electrode 8, pH electrode 9 and chlorine ion electrode 10 respectively; Described peristaltic pump the 6 and the 10 six-way valve 5 is controlled by the central control system 11 of Flow Injection Analysis System; Described 10 six-way valve the 5, the 20 six-way valve 7 controls its angle turned over by central control system 11.Central control system 11 draws the pH value of boiler water sample solution, chlorine ion concentration and total alkalinity by the signal collected.
The Inner of distilled water container 1 described in the present invention is equipped with distilled water, described boiler water sample solution container 2 Inner is equipped with boiler water sample solution, described standard acid container 3 Inner is equipped with standard acid, and described standard acid container 3 Plays acid solution selects the hydrochloric acid solution of 0.001mol/L.
As shown in Figure 2 to 4, described 10 six-way valve 5 comprises stator 5-1 and rotor 5-2, and described stator 5-1 and rotor 5-2 is connected by rotating shaft.Described stator 5-1 is provided with 8 upper holes of stator, is respectively the first stator upper hole 5-11, the second stator upper hole 5-12, the 3rd stator upper hole 5-13, the 4th stator upper hole 5-14, the 5th stator upper hole 5-15, the 6th stator upper hole 5-16, the 7th stator upper hole 5-17, the upper hole 5-18 of the 8th stator; Described rotor 5-2 is provided with the next hole of 8 rotors, 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 is rotationally connected, and is characterized in: where no matter rotor 5-2 turn to, and 8 upper holes of stator are communicated with the hole between the next upper and lower corresponding hole, hole of 8 rotors.The wherein said upper hole 5-18 of 8 upper Kong Zhong of stator, eight stators is connected with distilled water container 1, and first upper hole 5-11 of stator is connected with boiler water sample solution container 2, and second upper hole 5-12 of stator is connected with standard acid container 3; In the next hole of 8 rotors, first the next hole 5-21 of rotor is connected with peristaltic pump 6.
As shown in Fig. 5 ~ Fig. 7, described 20 six-way valve 7 comprises stator 7-1 and rotor 7-2, and described stator 7-1 and rotor 7-2 is connected by rotating shaft.Described stator is provided with 8 upper holes of stator, is respectively the first stator upper hole 7-11, the second stator upper hole 7-12, the 3rd stator upper hole 7-13, the 4th stator upper hole 7-14, the 5th stator upper hole 7-15, the 6th stator upper hole 7-16, the 7th stator upper hole 7-17, the upper hole 7-18 of the 8th stator; Described rotor 7-2 is provided with the next hole of 8 rotors, 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 is rotationally connected, and is characterized in: where no matter rotor 7-2 turn to, 8 the upper hole of stator hole corresponding connections the next with 8 rotors.In 8 wherein said upper holes of stator, first upper hole 7-11 of stator is connected with peristaltic pump 6, and the 5th the upper hole 7-15 of stator is connected with conductance electrode 8; In the next hole of 8 rotors, first the next hole 7-21 of rotor is connected with the next hole 7-25 of the 5th rotor, and second the next hole 7-22 of rotor is connected with the next hole 7-26 of the 6th rotor.
As shown in Figure 8
,the control signal that center-control data handling system is sent by host computer, data bus, control step motor, peristaltic pump respectively, control the 10 six-way valve the 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.
The 10 described six-way valve the 5, the 20 six-way valve 7 is carried out the automatic switchover of operation valve by Driving Stepping Motor action by central control system.The lower computer system of ten six-way valve control system is made up of the single-chip minimum system designed, 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 of four phase five-wire type stepping motors as ten six-way valve rotor turns, and stepper motor is driven by Single Chip Microcomputer (SCM) system, and single-chip microcomputer adopts the mode of four phase eight beat to carry out Driving Stepping Motor.Be burned onto single-chip microcomputer control program and mainly comprise driving stepper motor module and serial communication modular.The Step-by-step Motor Device Driver utilizing C language to write specifically comprises motor positive and inverse and controls, rotational angle control etc.Because the valve of designed system for ten six-way valves automatically switches, therefore the angle that designed system turns at every turn is 45 degree.The serial communication program utilizing C language to write adopts inquiry mode, and specifies serial port communication data packet format, specifically comprises data start bit, significance bit, stop bit etc.According to the data valid bit read, program judges that motor rotates forward or reversion, then Driving Stepping Motor action.
As shown in figs. 9 to 12, using method of the present invention is as follows: first, peristaltic pump 6 is started by central control system 11, and be 100 revs/min by its speed setting, 10 six-way valve 5 is in the 8th upper hole of stator in an initial condition, both distilled water drove forwards with the speed of 11.25ml/min per minute by peristaltic pump 6, and this process lasts about 1 minute, fundamental purpose is detergent line.
Secondly, central control system 11 makes the 10 six-way valve 5 turn over 45 degree clockwise, make it be in the 8th upper hole of stator, meanwhile the rotating speed of peristaltic pump 6 is dropped to 40 revs/min, namely boiler water sample solution drives forwards with the speed of 4.5ml/min by peristaltic pump 6.The pipeline be connected by the next hole of the next Kong Yu of first rotor of the 20 six-way valve 7 five rotors through boiler water sample solution is after a while full of whole pipeline, when boiler water sample solution flows through conductance electrode 8, the conductivity of conductance electrode 8 meeting rapid test boiler water sample solution, simultaneously central data processing system is by gathering its signal sent, through calculating the conductivity of boiler water sample solution accordingly.In like manner, when boiler water sample solution flows through pH electrode 9, chlorine ion electrode 10, central control system draws the pH value of boiler water sample solution by the signal collected, and chlorine ion concentration.
Then, central control system 11 controls the 10 six-way valve 5 and again turns over 45 degree clockwise, and make it be in the next hole of second rotor, now peristaltic pump pumps concentration is the standard salt acid solution of 0.001mol/L, and the rotating speed of peristaltic pump maintains 40 revs/min.Meanwhile, central control system 11 controls the 20 six-way valve 7 and turns over 45 degree equally clockwise, and standard acid is full of whole pipeline by the pipeline in the next hole of the next Kong Yu of second rotor of the 20 six-way valve 7 six rotors after after a while.Central control system makes the 20 six-way valve 7 turn over 45 degree counterclockwise more afterwards, return to original location status, now, remain in boiler water sample solution in the next hole of first rotor the next Kong Yu five rotors pipeline of the 20 six-way valve 7 hybrid reaction with it under the driving of current-carrying hydrochloric acid, when mixed solution flows through pH electrode, the magnitude of voltage of pH electrode meeting rapid test mixed solution each point, experimental result shows that pH electrode is with the magnitude of voltage of the form record mixed solution each point at FIA peak.
Finally, the boiler water sample solution of the present invention to 50 groups of different basicity is utilized to measure its FIA spike shape.The present invention, first according to the magnitude of voltage of 50 groups of boiler water sample solutions measured and the boiler water total alkalinity of correspondence thereof, 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.When the present invention is determined at the boiler water sample solution of unknown total alkalinity, first central control system 11 by gathering the magnitude of voltage of each point of the mixed solution that pH electrode measurement obtains, then calculates the total alkalinity of boiler water sample solution according to the boiler water total alkalinity equation about mixed solution magnitude of voltage set up in advance.
Thus, realize the fast and effeciently mensuration to boiler water quality many kinds of parameters, these parameters comprise conductivity, pH value, chlorine ion concentration and total alkalinity.
Claims (5)
1. the boiler water quality pick-up unit based on Flow Injection Analysis and soft-measuring technique, comprise distilled water container (1), boiler water sample solution container (2), standard acid container (3), waste liquid cup (4), conductance electrode (8), pH electrode (9) and chlorine ion electrode (10), it is characterized in that: also comprise the 10 six-way valve (5), peristaltic pump (6) and the 20 six-way valve (7); Described distilled water container (1), boiler water sample solution container (2), standard acid container (3) are connected with the 10 six-way valve (5) respectively by flexible pipe; 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); 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 controlled by the central control system (11) of Flow Injection Analysis System; Described 10 six-way valve (5), the 20 six-way valve (7) control its rotational angle by central control system (11), and central control system (11) draws the pH value of boiler water sample solution, chlorine ion concentration and total alkalinity by the signal collected;
Described 10 six-way valve (5) comprises stator (5-1) and rotor (5-2), and described stator (5-1) is provided with eight upper holes of stator; Described rotor (5-2) is provided with the next hole of eight rotors; Rotor (5-2) and stator (5-1) are rotationally connected, the hole corresponding connection the next with eight rotors of described eight upper holes of stator;
Described 20 six-way valve (7) comprises stator (7-1) and rotor (7-2), and described stator (7-1) is provided with eight upper holes of stator; Described rotor (7-2) is provided with the next hole of eight rotors; Rotor (7-2) and stator (7-1) are rotationally connected, the hole corresponding connection the next with eight rotors of described eight upper holes of stator.
2. as claimed in claim 1 based on the boiler water quality pick-up unit of Flow Injection Analysis and soft-measuring technique, it is characterized in that: eight upper Kong Zhong of stator, eight the upper holes of stator (5-18) in described 10 six-way valve (5) are connected with distilled water container (1), first upper hole of stator (5-11) is connected with boiler water sample solution container (2), and second upper hole of stator (5-12) is connected with standard acid container (3).
3., as claimed in claim 1 based on the boiler water quality pick-up unit of Flow Injection Analysis and soft-measuring technique, it is characterized in that: in the next hole of eight rotors in described 10 six-way valve (5), first the next hole (5-21) of rotor is connected with peristaltic pump (6).
4. as claimed in claim 1 based on the boiler water quality pick-up unit of Flow Injection Analysis and soft-measuring technique, it is characterized in that: in eight upper holes of stator in described 20 six-way valve (7), first upper hole of stator (7-11) is connected with peristaltic pump (6), the 5th the upper hole of stator (7-15) is connected with conductance electrode (8).
5. as claimed in claim 1 based on the boiler water quality pick-up unit of Flow Injection Analysis and soft-measuring technique, its feature: in the next hole of eight rotors in described 20 six-way valve (7), first the next hole (7-21) of rotor is connected with the next hole (7-25) of the 5th rotor, second the next hole (7-22) of rotor is connected with the next hole (7-26) of the 6th rotor.
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| 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 |
| CN104101722B (en) * | 2014-07-15 | 2015-09-30 | 广州特种承压设备检测研究院 | Entry automatic continuous analysis device and analytical approach thereof in Industrial Boiler water quality detection |
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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 |
| 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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