CN101303303A - On-line automatic monitoring instrument of circulation cooling water quality stabilizing agent - Google Patents
On-line automatic monitoring instrument of circulation cooling water quality stabilizing agent Download PDFInfo
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- CN101303303A CN101303303A CNA2008100713075A CN200810071307A CN101303303A CN 101303303 A CN101303303 A CN 101303303A CN A2008100713075 A CNA2008100713075 A CN A2008100713075A CN 200810071307 A CN200810071307 A CN 200810071307A CN 101303303 A CN101303303 A CN 101303303A
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Abstract
The present invention relates to a monitoring instrument, and provides a circulating cooling water quality stabilizing agent online automatic monitor for monitoring and controlling a water stabilizing agent in industrial circulating cooling water in real time in an online manner. The instrument comprises incident light sources, a flow tank, a signal filtering and focusing unit, a signal conversion unit, and a signal processing and display unit; the incident light sources on both sides of the flow tank excite the characteristic base groups in the fluorescent tracer in the circulating water flowing through the tank, the signal filtering and focusing unit carries out focusing and filtering for the fluorescent signals; the signal conversion unit converts the acquired optical signals into electric current signals, and amplifies the current signals to obtain pulse signals at corresponding frequencies; the signal processing and display unit processes the pulse signals and emits appropriate control signals, inputs preset parameters, and displays the processing result. The instrument has high sensitivity and accuracy, and can be used to add agents automatically and detect the agents continuously in circulating water.
Description
Technical field
The present invention relates to a kind of monitoring instrument, in particular for industrial circulating cooling water water quality stabilizer online auto monitoring device.
Background technology
In the industrial circulating cooling water system of steel mill, power plant, calcium, magnesium ion concentrate and cause watering equipment or water treatment facilities surface scale, reduce heat transfer efficiency, even blocking pipe, so various water quality stabilizer is used widely.For keeping the lasting effect of inhibition, scale inhibition, need to keep the content of water quality stabilizer in the recirculated water in certain limit.If the concentration deficiency then can not be brought into play the effect of water treatment agent; If excessive concentration then causes waste, and brings negative effect to circulation.Thereby concentration how to measure water quality stabilizer quickly and accurately is most important.
In actual production process, because water quality stabilizer is phosphorous usually, so most units adopt artificial sample to detect the total phosphorus content of water sample, manually add the method for water quality stabilizer, this method wastes time and energy, and lag behind reality in the acquisition data greatly, can not accomplish to control in real time the water stabilization agent concentration.Though total phosphorus content determination and analysis instrument has dropped into commercial the use, Phosphax ∑ Sigma total phosphorus in-line analyzer as U.S. Hash company, under high temperature, high pressure, it adopts the quick resolution method of acid potassium persulfate, measures about a sample time spent 10min, and it is still identical with manual analytical approach that it detects principle, need to add various medicaments, the instrument maintenance amount is big, and the test sample cycle is long, and incompatibility is used in circulation.
The external technology of water treatment company aspect monitoring is advanced relatively, has developed some on-line monitorings and control instrument, and has used in actual production.U.S. Nalco company has developed a kind of TRASAR technology by name in early 1990s, its assay method is to link fluorophor on the effective constituent of water quality stabilizer, utilize online fluorescence detector to detect its fluorescence intensity, with real-time control water stabilization agent content.The unit that China introduces this technology seldom, main cause is costing an arm and a leg of this water quality stabilizer.
Summary of the invention
Purpose of the present invention aims to provide a kind of the realization the online detection of water stabilization agent content in the industrial circulating cooling water and the on-line automatic monitoring instrument of circulation cooling water quality stabilizing agent of controlling in real time.
The present invention is provided with left incident light source and right incident light source, flow cell, filtering signals focalizer, chromacoder, signal Processing display device, computing machine, RS232 serial line interface and charge pump; The filtering signals focalizer is provided with condenser lens and narrow band pass filter, and chromacoder is provided with photoelectric commutator and signal preamplifier, and the signal Processing display device is provided with processor controls, display screen and keyboard; Left side incident light source and right incident light source are located at the both sides of flow cell, condenser lens is positioned at the below of flow cell, narrow band pass filter is located at the below of condenser lens, narrow band pass filter leach the I/O mouth that the electrical signal of light beam after photoelectric commutator conversion connects processor controls, the I/O mouth of the input termination processor controls of display screen, the output termination processor controls I/O mouth of keyboard, the I/O mouth of processor controls connects the RS232 serial line interface of computing machine by the RS232 serial line interface, and charge pump is connected with the I/O mouth of processor controls.
Left side incident light source and right incident light source can adopt the high brightness single color LED, add the Halogen lamp LED or the LASER Light Source of optical filter.Flow cell can be quartz glass tube.Display screen can adopt LCDs.
The present invention in addition can be provided with the RS232 serial line interface, and equipment such as external printer so that the data that detect are preserved and printed etc., also can be realized instrument is sent the regularly control of start detection.
Be arranged in the left incident light source of flow cell both sides and the fluorescent tracer characteristic group of the recirculated water that right incident light source excites the flow cell of flowing through, the filtering signals focalizer carries out light to the fluorescence signal that is produced and focuses on and filter, chromacoder converts the light signal of gathering to current signal, and this current signal is carried out obtaining after the processing and amplifying pulse signal of corresponding frequencies value; Control signal corresponding is handled and sent to processor controls to the frequency pulse signal, and instrument parameter is imported by keyboard, and the parameter and the result of setting show at display screen.
The present invention is based on fluorescent tracer technique, the performance of instrument key modules is optimized, realized high precision stable detection, guaranteed the reliability of instrument performance the fluorescence feeble signal.Because of having adopted fluorescent tracer technique, indirectly to water stabilization agent content on-line monitoring in the recirculated cooling water and control in good time, it is compared with dropping into the commercial total phosphorus content determination and analysis instrument that uses, and simpler in the design of instrument, the cycle of test sample is shorter.Thereby be highly suitable in the industry to the water stabilization agent concentration of recirculating cooling water system monitoring and control.It has following characteristics:
1) simple to operate, the automaticity height can be realized lot of manpower and material resources is saved in online detection of circular cooling water quality stabilizer content and control in real time.
2) height of precision as a result of Ce Lianging, the detection lower limit of instrument can reach 1mg/L, and can often calibrate correction to instrument, guarantees to detect the reliability of data.
3) through changing the light source and the optical filter of inert fluorescent tracer, monitor, promptly can be applicable to the on-line monitoring occasion that other any fluorescent tracer technology is suitable for, have vast market prospect and significant social economic benefit.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
Fig. 2 is the system program flow process of the embodiment of the invention.
Fig. 3 is the pinouts of the processor controls of the embodiment of the invention.
Fig. 4 is that the chromacoder and the signal Processing display device circuit of the embodiment of the invention formed schematic diagram.
Fig. 5 is the fluorescent tracing agent concentration of the embodiment of the invention and the correlogram of total phosphorus concentration.In Fig. 5, horizontal ordinate is total phosphorus concentration (μ g/mL), and ordinate is fluorescent tracing agent concentration (ng/mL), y=58.553X+68.105 wherein, R
2=0.969.
Embodiment
Below in conjunction with accompanying drawing the present invention is elaborated.
Referring to Fig. 1, the present invention is provided with left incident light source 31 and right incident light source 32, flow cell 2, filtering signals focalizer, chromacoder, signal Processing display device, RS232 serial line interface 11, charge pump 12 and computing machine 13; The filtering signals focalizer is provided with condenser lens 4 and narrow band pass filter 5, and chromacoder is provided with photoelectric commutator 6 and signal preamplifier 7, and the signal Processing display device is provided with processor controls 8, LCDs 9 and keyboard 10; Left side incident light source 31 and right incident light source 32 are located at the both sides of flow cell 2, condenser lens 4 is positioned at the below of flow cell 2, narrow band pass filter 5 is located at the below of condenser lens 4, narrow band pass filter 5 leach the I/O mouth that the electrical signal of light beam after photoelectric commutator 6 conversion connects processor controls 8, the I/O mouth of the input termination processor controls 8 of LCDs 9, the I/O mouth of the output termination processor controls 8 of keyboard 10, the I/O mouth of processor controls 8 connects the RS232 serial line interface of computing machine 13 by RS232 serial line interface 11, and charge pump 12 is connected with the I/O mouth of processor controls 8.
By the by-pass pipe of recirculated cooling water water pipe, small amount of recycled water sample 1 is caused flow cell 2 in real time; Left incident light source 31 in opposite directions and right incident light source 32 are with the fluorescent tracer characteristic group in the certain frequency pulse excitation recirculated water, produce the fluorescence signal of specific wavelength, after 5 pairs of fluorescence signals that produced of condenser lens 4 and narrow band pass filter carried out light focusing and filtration, signal was delivered to photoelectric commutator (silicon photoelectric diode) 6 and is converted weak one to faint current signal; Signal preamplifier 7 carries out this current signal to obtain after the processing and amplifying pulse signal of corresponding frequencies value; Processor controls 8 is gathered this frequency signal, calculates fluorescent tracing agent concentration in the water outlet, adds the concentration value that ratiometric conversion goes out current water quality stabilizer by water quality stabilizer and fluorescent tracer.This numerical value not only can show on the LCDs 9 of on-line monitoring instrument, also can adopt the RS232 agreement to send computing machine 13 to show through RS232 serial line interface 11.Processor controls 8 also can be with the concentration value that records and the set value of defining relatively, and control is used to add the opening and closing of the charge pump 12 of water quality stabilizer, and water quality stabilizer is remained in the scope of requirement.Keyboard 10 is used to import instrument parameter.
System program flow process of the present invention is referring to Fig. 2.
What function was at first finished is to the Single Chip Microcomputer (SCM) system initialization, shows the start interface on LCDs, reads preset parameter then, keyboard is scanned, and make judgement.If press the START key, will carry out sample concentration and detect; If press the MENU key, the switching at interface will be set, comprise calibration settings, fixed time interval setting, define 4 of concentration setting and the adjustment of demonstration time etc. the interface is set, can be as the case may be the parameter at each interface be provided with.
Processor controls is provided with the multivibrator (driving incident light source) of the 1kHz of single-chip microcomputer HT46R24, clock chip BL5732, RS232 level transferring chip MAX232N, Serial E PROM AT24C256 storage chip (storage character library and system's preset parameter), high-power NMOS pipe IRF630 (driving charge pump), timing chip LM555 formation, and the driving interface circuit of film key and Liquid Crystal Module AM128128 etc.
The input and output controls (as shown in Figure 3) of single-chip microcomputer are as follows: port one, 2,27,28 is the row-input control signal line of keyboard, port 3,4,5,6 is the row input control signal line of keyboard, keyboard is the input controls of 4 * 4 determinant keyboards, behind the system power-on reset, with regard to beginning to call the keyboard scan subroutine input port of 4 * 4 determinant keyboards is scanned, PB4 in the single-chip microcomputer～PB7 port is as the capable input port of keyboard, and PA0～PA3 port is as the row input port of keyboard.If there is button to press, the 10ms that then delays time scans once more; If still have key to press, then call button inquiry subroutine and inquire about, carry out respective handling.Port 7,8,9,10,12,13 is the output control signal wire of LCDs, and LCDs is FSTN, and dot matrix format is 128 * 128.Each port of single-chip microcomputer is corresponding to the pin of LCDs, port 7 correspondences be the S6B0741 controller sheet choosing end of LCDs, port 8 correspondences be the background Enable Pin of LCDs, port 9 correspondences be the S6B0741 controller reset signal end of LCDs, port one 0 correspondence be the data signals of serial end of LCDs, port one 2 correspondences be the instruction and the data select signal end of LCDs, port one 3 correspondences be the serial ports clock signal terminal of LCDs.Instrument calls the word of having stored and is presented on the LCDs after starting from storer EPROM AT24C256. Port 25,26 connects T2IN and the R2OUT pin of level transferring chip MAX232N, adopts the asynchronous transmission pattern of USART to carry out the transmission of data.Port one 8 is the frequency signal line of prime amplifier module output, and port 24 is charge pump output control signal wire.
Referring to Fig. 4, silicon photoelectric diode converts the fluorescence signal of receiving to faint current signal, this current signal carries out preposition amplification through an integrating amplification circuit that is made of amplifier CA3140, the RC value of this amplifier makes its frequency bandwidth reach 4.976kHz, far is wider than the fluorescence signal bandwidth of 1kHz.The fluorescence signal that has amplified is through capacitor C
4Afterwards, dc noise undesired signal wherein will be by filtering, and waveform integral body moves down, and then carries out detection by amplifier AD706, only keeps the forward level.After by cutoff frequency being the noise of the further filtering high band of the active integration low-pass filter of second order of 6Hz, fluorescence signal becomes direct current signal by the 1kHz alternating signal, and this signal is through becoming the pulse signal of corresponding frequencies value behind V/F converter of AD650.
Below provide usage example of the present invention:
In the recirculated cooling water dynamic analog device, add 250L steel mill circulating water system, as the recirculated cooling water of system.In the ratio of fluorescent tracer that contains 250 μ g in every premium on currency and 50mg water quality stabilizer, promptly fluorescent tracing agent concentration and water stabilization agent concentration are 1: 200, add reagent, running gear.
Before using the present invention that water sample is measured, need earlier instrument to be calibrated correction work, according to fluorescent tracer concentration value in the water sample, the upper and lower mark liquid of this concentration value is contained in preparation, for reducing error at measurment, difference between the concentration value of upper and lower mark liquid is unsuitable excessive, and the concentration value of general subscript liquid is set to half of water sample concentration value; The concentration value of subscript liquid is set to 2 times water sample concentration value.As this dynamic simulation experiment initial concentration is 250ng/mL, and the upper and lower calibration solution concentration value that is disposed is respectively 100ng/mL and 500ng/mL.
After the energized, LCDs enters the start interface, enter first by " MENU " key the interface is set, confirm by " ENTER " key, this interface is operated, and " * " select finger will appear in this moment, select " calibration lower limit " by " ENTER " key, remove the original calibration concentration value of preserving by " CLR " key again, import required calibration lower limit solution concentration value: 100ng/mL.After click " ENTER " key was determined, by " START " key, instrument entered scale operation again, and interface display is: " calibration lower limit: 100ng/mL ", withdraw from this display interface behind the about min, finish subscript liquid scale operation.By above operation, instrument is carried out subscript liquid scale operation.
In first is provided with the interface, to defining concentration value and fixed time interval is set.After configuring each parameter, withdraw from,, just switch to the sample detection interface, fluorescent tracing agent concentration in the current water sample is detected by " START " key to the start interface.Refresh once current detected concentration value p.s., behind the 3min, last 10 groups of data are averaged, as last measurement result.
Every 2h measures a water sample, the continuous on-line monitoring fluorescent tracing of 24h agent concentration; When automonitor was analyzed, water sampling carried out the analysis of total phosphorus conventional chemical.Previous experiments shows that the stability and the antijamming capability of fluorescent tracer are good, and except that influenced by biocide to make intensity decays to some extent, other material has no effect to it.After historical facts or anecdotes is tested and carried out a period of time, add oxidisability biocide and non-oxidative bactericide, observe their influences respectively fluorescent tracer according to the dosage of factory's day-to-day operation.Therapy lasted duration 6 days obtains 72 data points altogether.
Relatively the data of two methods get the linear correlation curve between fluorescent tracing agent concentration and the total phosphorus concentration, and its linear fit equation is: y=58.553x+298.11 (n=72, R
2=0.969), wherein y is fluorescent tracing agent concentration (ng/mL), and x is total phosphorus concentration (μ g/mL).Show as the fluorescent tracing agent concentration of Fig. 5 and the correlation curve of total phosphorus concentration, under the condition that interfering materials such as biocide exist, good correlativity is still arranged between fluorescent tracing agent concentration and the total phosphorus concentration, fully can be by monitoring fluorescent tracing agent concentration, indirect monitoring water treatment agent concentration.
Claims (5)
1. on-line automatic monitoring instrument of circulation cooling water quality stabilizing agent is characterized in that being provided with left incident light source and right incident light source, flow cell, filtering signals focalizer, chromacoder, signal Processing display device, computing machine, RS232 serial line interface and charge pump; The filtering signals focalizer is provided with condenser lens and narrow band pass filter, and chromacoder is provided with photoelectric commutator and signal preamplifier, and the signal Processing display device is provided with processor controls, display screen and keyboard; Left side incident light source and right incident light source are located at the both sides of flow cell, condenser lens is positioned at the below of flow cell, narrow band pass filter is located at the below of condenser lens, narrow band pass filter leach the I/O mouth that the electrical signal of light beam after photoelectric commutator conversion connects processor controls, the I/O mouth of the input termination processor controls of display screen, the output termination processor controls I/O mouth of keyboard, the I/O mouth of processor controls connects the RS232 serial line interface of computing machine by the RS232 serial line interface, and charge pump is connected with the I/O mouth of processor controls.
2. on-line automatic monitoring instrument of circulation cooling water quality stabilizing agent as claimed in claim 1 is characterized in that left incident light source and right incident light source are the high brightness single color LED, add the Halogen lamp LED or the LASER Light Source of optical filter.
3. on-line automatic monitoring instrument of circulation cooling water quality stabilizing agent as claimed in claim 1 is characterized in that flow cell is a quartz glass tube.
4. on-line automatic monitoring instrument of circulation cooling water quality stabilizing agent as claimed in claim 1 is characterized in that display screen is a LCDs.
5. on-line automatic monitoring instrument of circulation cooling water quality stabilizing agent as claimed in claim 1, it is characterized in that processor controls is provided with the multivibrator of the 1kHz of HT46R24 single-chip microcomputer, clock chip BL5732, RS232 level transferring chip MAX232N, Serial E PROMAT24C256 storage chip, high-power NMOS pipe IRF630, timing chip LM555 formation, and the driving interface circuit of film key and Liquid Crystal Module AM128128.
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| CNA2008100713075A CN101303303A (en) | 2008-06-27 | 2008-06-27 | On-line automatic monitoring instrument of circulation cooling water quality stabilizing agent |
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| CNA2008100713075A CN101303303A (en) | 2008-06-27 | 2008-06-27 | On-line automatic monitoring instrument of circulation cooling water quality stabilizing agent |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614346A (en) * | 2013-11-05 | 2015-05-13 | 上海阔思电子有限公司 | Circulating water agent concentration detector |
| CN104833820A (en) * | 2015-05-08 | 2015-08-12 | 华中科技大学 | Flow velocity measurement system based on fluorescent tracing technique and method thereof |
| CN104977281A (en) * | 2015-06-26 | 2015-10-14 | 桂林电子科技大学 | High-precision online fluorescence detector and detection method thereof |
| CN110186883A (en) * | 2013-11-19 | 2019-08-30 | 凯米罗总公司 | For analyzing the method comprising at least sample of the first and second antisludging agents |
| CN111044688A (en) * | 2020-01-13 | 2020-04-21 | 深圳市无眼界科技有限公司 | Parameter configuration method and environment monitoring equipment thereof |
| CN111595831A (en) * | 2020-06-04 | 2020-08-28 | 山东丰益泰和科技有限公司 | Method for monitoring water treatment agent content in industrial circulating water by adopting efficient fluorescent carbon quantum dot tracing |
| CN113461087A (en) * | 2021-08-17 | 2021-10-01 | 北京首创生态环保集团股份有限公司 | Economical water plant drug consumption monitoring system |
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2008
- 2008-06-27 CN CNA2008100713075A patent/CN101303303A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614346A (en) * | 2013-11-05 | 2015-05-13 | 上海阔思电子有限公司 | Circulating water agent concentration detector |
| CN104614346B (en) * | 2013-11-05 | 2018-06-01 | 上海阔思电子有限公司 | Recirculated water drug concentration detector |
| CN110186883A (en) * | 2013-11-19 | 2019-08-30 | 凯米罗总公司 | For analyzing the method comprising at least sample of the first and second antisludging agents |
| CN110186883B (en) * | 2013-11-19 | 2021-11-12 | 凯米罗总公司 | Method for analysing a sample comprising at least a first and a second scale inhibitor |
| CN104833820A (en) * | 2015-05-08 | 2015-08-12 | 华中科技大学 | Flow velocity measurement system based on fluorescent tracing technique and method thereof |
| CN104977281A (en) * | 2015-06-26 | 2015-10-14 | 桂林电子科技大学 | High-precision online fluorescence detector and detection method thereof |
| CN111044688A (en) * | 2020-01-13 | 2020-04-21 | 深圳市无眼界科技有限公司 | Parameter configuration method and environment monitoring equipment thereof |
| CN111595831A (en) * | 2020-06-04 | 2020-08-28 | 山东丰益泰和科技有限公司 | Method for monitoring water treatment agent content in industrial circulating water by adopting efficient fluorescent carbon quantum dot tracing |
| CN113461087A (en) * | 2021-08-17 | 2021-10-01 | 北京首创生态环保集团股份有限公司 | Economical water plant drug consumption monitoring system |
| CN113461087B (en) * | 2021-08-17 | 2022-10-21 | 北京首创生态环保集团股份有限公司 | Economical water plant drug consumption monitoring system |
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Open date: 20081112 |