CN103713055A - High-concentration substance detection device and method - Google Patents
High-concentration substance detection device and method Download PDFInfo
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- CN103713055A CN103713055A CN201310755172.5A CN201310755172A CN103713055A CN 103713055 A CN103713055 A CN 103713055A CN 201310755172 A CN201310755172 A CN 201310755172A CN 103713055 A CN103713055 A CN 103713055A
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Abstract
The invention relates to a high-concentration substance detection device which comprises a feeding hole, a detector, a switching unit, a sample preparation unit, a chromatographic detection unit and a control unit, wherein the feeding hole is connected with the switching unit and the detector; the detector detects sample information which enters from the feeding hole in real time; the switching unit is connected with the sample preparation unit, the chromatographic detection unit and the control unit; the switching unit can perform connection and disconnection among the sample preparation unit, the chromatographic detection unit and the feeding hole under control of the control unit; the sample preparation unit is used for storing a sample when the sample preparation unit is communicated with the feeding hole; the chromatographic detection unit is used for detecting the sample information when the chromatographic detection unit is communicated with the feeding hole; the control unit is connected with the detector and is used for controlling a switching result according to the detection result of the detector. The invention also provides a high-concentration substance detection method. The device has the advantages of wide quantification range, information accuracy and comprehensiveness, high flexibility, high system integration level, and the like.
Description
Technical field
The present invention relates to a kind of pick-up unit and method, especially a kind of high concentration substance detecting apparatus and method.
Background technology
In industrial processes, the waste gas of generation is discharged in atmosphere after effectively processing.But equipment in use, as occur the generation of the phenomenons such as aging or fault of equipment, the high concentration component of generation is not also just discharged in air through effective processing, can cause the pollution of atmosphere.
In industrial processes, arranging steathily phenomenon also happens occasionally, the component of drain time and discharge is often difficult to controlled in time and trace to the source, cannot provide good suggestion to production technology optimization and administrative law enforcement, when serious, can cause larger impact and harm to the mankind's health.
For early warning and detection that reply industry high-concentration component is revealed, prior art has following several solution:
1, Electronic Nose
Adopt electronic inductor to carry out early warning to revealing component.The method can only be carried out early warning by super many finite concentrations to all components, cannot provide material information and the concentration information of revealing material one-component.
2, online analytical instrument
Online analytical instrument is applied to reveal component analysis, can only detect the component of finite concentration scope, detectable concentration is limited in scope, can cause testing result to have larger error, and there is certain analytical cycle in online analytical instrument, if leak case appears in analytical cycle, cannot carry out the trapping of sample, can cause the distortion and the erroneous judgement that detect data.
3, timing sampling device
Adopt negative pressure sampling thief, certain damping be set in conjunction with timing controller, to fixed location fix a point, regularly, determine volume and sample, the sample after collection is transported to laboratory and carries out analyzing and testing.The method can obtain original sample gas information, but cannot realize the collection of on-fixed time leakage sample.Even and sampling when revealing, if the leakage time is less than the timing sampling time of timing sampling device, after high concentration leakage sample collection completes, timing sampling device also will be sampled as air to ambient gas, and the ambient gas of collection is stored in sampling thief together, because ambient gas concentration is lower than sample concentration, cause the sample of sampling thief collection to be diluted.
Summary of the invention
In order to solve above-mentioned deficiency of the prior art, the invention provides a kind of quantitative wide ranges, information accurately, comprehensively, flexibility ratio is high, level of integrated system is high high concentration substance detecting apparatus and method.
For achieving the above object, the present invention adopts following technical scheme:
A high concentration substance detecting apparatus, comprising:
Injection port, described injection port is connected with detecting device with described switch unit;
Detecting device, described detecting device detects the sample message entering from injection port in real time;
Switch unit, described switch unit is also connected with control module with standby sample unit, chromatogram detecting unit, and described switch unit is realized the break-make between standby sample unit, chromatogram detecting unit, injection port under the control of control module;
Standby sample unit, for stored sample when being connected between standby sample unit and injection port;
Chromatogram detecting unit, described chromatogram detecting unit for detecting sample message when being connected between chromatogram detecting unit and injection port;
Control module, described control module is also connected with detecting device, for controlling switch unit according to the testing result of detecting device.
Further, described high concentration substance detecting apparatus also comprises alarm unit, and described control module sends warning message according to the working state control alarm unit of the testing result of detecting device/standby sample unit.
Further, described chromatogram detecting unit comprises quantitative ring and/or enrichment pipe.
As preferably, described standby sample unit comprises Soviet Union's code tank.
As preferably, the detecting device in described detecting device and chromatogram detecting unit is same detecting device.
The present invention also provides a kind of high concentration substance detecting method, comprises the following steps:
A, sample enter detecting device from injection port and detect;
B, detecting device pass to control module by testing result, and control module compares testing result and preset value:
If testing result is higher than preset value, control module is controlled switch unit and is connected the stream between injection port and chromatogram detecting unit, detects sample message; Control module is controlled switch unit and is connected the stream between injection port and standby sample unit, and sample is stored to standby sample, until testing result is lower than preset value, control module is controlled switch unit and disconnected injection port and stream between sample unit, for sample, finishes;
When switch unit switches stream, control module all gathers corresponding temporal information;
Return to steps A.
Further, described testing result is higher than preset value or standby sample unit can not standby sample time, and control module is controlled alarm unit and sent warning message.
Further, in step B, if testing result lower than preset value, control module is controlled chronologically switch unit and is connected, disconnects the stream between injection port and chromatogram detecting unit, detection sample message.
Further, described high concentration substance detecting method also comprises step C, and control module is controlled switch unit and connected the stream between standby sample unit and chromatogram detecting unit, and chromatogram detecting unit is detected the sample in standby sample unit.
Further, described chromatogram detecting unit comprises quantitative ring and/or enrichment pipe.
As preferably, described standby sample unit comprises Soviet Union's code tank.
As preferably, the detecting device in described detecting device and chromatogram detecting unit is same detecting device.
The present invention compared with prior art has following beneficial effect:
1, quantitative wide ranges
Employing enrichment pipe and quantitatively ring, carry out sample collection to low concentration and high concentration leakage component respectively, quantitative wide ranges, and testing result is accurate.
2, information is comprehensive
Detecting device continues Real-Time Monitoring sample message, obtains the total concentration of sample, and concentration change trend;
In high concentration, reveal moment, the content of each composition in chromatogram detecting unit detection of leaks moment sample;
Sample in standby sample unit is detected, can obtain the situation of sample in the whole leakage time period, conveniently carry out sample and trace to the source;
Thus, by the present invention, can obtain the various sample messages corresponding with the time, information is comprehensive, to administrative service division, provides comprehensive and accurate reference.
3, information is accurate
Standby sample unit opens and closes in time according to Real-time Monitoring Data, avoid standby sample not in time or the opening time oversize and cause the dilution of sample; Make to carry out according to the testing result of standby sample unit the information that sample traces to the source more accurate.
4, flexibility ratio is high
System intialization can arrange according to actual condition; Flexibility ratio is high.
5, level of integrated system is high
Valve road switched system can carry out flexibly high lower range concentration sampling analysis and switch, and can support a plurality of collections to sample for original mold piece in a plurality of standby samples unit.
Accompanying drawing explanation
Fig. 1 is embodiment 1 middle and high concentration substance detecting apparatus schematic diagram;
Fig. 2 is embodiment 2 middle and high concentration substance detecting apparatus schematic diagram.
Embodiment
Embodiment 1
Refer to Fig. 1, a kind of high concentration substance detecting apparatus, comprises injection port 11, detecting device 21, switch unit 31, standby sample unit 41, chromatogram detecting unit 51 and control module (not marking in the drawings);
Described injection port 11 is connected with detecting device 21 by pump 211, and pump 211 continuous firings, so that the sample entering from injection port 11 is detected in real time by detecting device 21; Described detecting device 21 is connected with described control module, and real-time testing result is passed to control module, the corresponding testing result of control module record storage, and gather simultaneously, store temporal information corresponding to corresponding testing result;
Described switch unit 31 is connected with control module with described injection port 11, standby sample unit 41, chromatogram detecting unit 51;
Described switch unit 31 is realized the break-make between standby sample unit 41, chromatogram detecting unit 51, injection port 11 under the control of control module;
Concrete device to switch unit is without restriction, simultaneously also without restriction to the number of injection port, as long as the switch unit arranging and injection port can be realized by injection port, sample is passed into standby sample unit, chromatogram detecting unit.
Preferably, described control module can also be controlled switch unit is connected standby sample unit between detecting with chromatogram, so that chromatogram detecting unit detects for the sample message in sample unit.
The present embodiment, injection port only has one, and injection port 11 is connected with chromatogram detecting unit 51 with described standby sample unit 41 by described switch unit 31;
Described switch unit 31 comprises multi-channel direction selecting valve 311 and solenoid valve 312; Described injection port 11 is connected with solenoid valve 312 one end, and solenoid valve 312 other ends are connected with the public port O mouth of multi-channel direction selecting valve 311; Described chromatogram detecting unit 51 is connected with the 1st interface of multi-channel direction selecting valve 311;
Control module is controlled switch unit 31 according to the testing result of detecting device 21, realize the break-make between standby sample unit 41, chromatogram detecting unit 51 and injection port 11: when being connected between sample unit and injection port, control module is controlled switch unit is connected the common interface O mouth of multi-channel direction selecting valve 311 and the standby sample device of one of them sky, thus stored sample; While being connected, detect sample message between chromatogram detecting unit and injection port.
Standby sample unit can meet control module to be controlled and closes, and the sample gathering can realize stable existence therein, the present embodiment, and described standby sample unit 41 comprises Soviet Union's code tank 411.Soviet Union's code tank inside surface, through polishing, plating or high cleaning, has the advantages such as chemical activity is low, stability is high, anti-collision is good, preferentially selects.Owing to being negative pressure in Soviet Union code tank 411, at control module, to control while being connected between Soviet Union's code tank 411 that switch unit 31 makes injection port 11 and one of them sky, the sample in injection port is directly pressed into empty Soviet Union's code tank 411 to carry out for sample.
Standby sample device in standby sample unit does not use, and can continue standby sample, and now, standby sample unit is in normal operating conditions; If the standby sample device in standby sample unit is finished, can not continue standby sample, now, for sample unit in abnormal work state, the standby sample device that now just need to notify staff more to renew.
The sample that the interior standby sample device in standby sample unit 41 stores can detect as required in good time, as taken back laboratory for sample device, detect, or be directly communicated with the stream between standby sample unit 41 and chromatogram detecting unit 51, make 51 pairs of chromatogram detecting units in sample unit 41 the sample in the standby sample device of stored sample detect.
Further, described chromatogram detecting unit comprises quantitative ring and/or enrichment pipe.
If chromatogram detecting unit comprises quantitative ring and enrichment pipe,, chromatogram detecting unit has quantitative ring detecting pattern and enrichment pipe detecting pattern, selects quantitatively ring detecting pattern or enrichment pipe detecting pattern when control module is also connected with chromatogram detecting unit according to testing result control injection port.
The present embodiment chromatogram detecting unit 51 comprises multi-position valve 511, quantitatively encircles 512, pump 513, chromatographic column 514 and chromatographic detector 515.The device of chromatogram detecting unit and corresponding matching relationship are the state of the art, do not repeat them here.
In order to know in time the testing result of detecting device, further, described high concentration substance detecting apparatus also comprises alarm unit, and described control module sends warning message according to the working state control alarm unit of the testing result of detecting device/standby sample unit.
Preferably, the detecting device in described detecting device and chromatogram detecting unit is same detecting device, to improve level of integrated system.
The present invention also provides a kind of high concentration substance detecting method, comprises the following steps:
The high concentration substance detecting apparatus of A, employing the present embodiment;
Sample continues to pass into detecting device 21 from injection port 11 and detects;
B, detecting device 21 pass to control module by testing result, and control module compares testing result and preset value X:
If testing result is higher than preset value X, control module is controlled the stream that switch unit 31 is connected between injection port 11 and chromatogram detecting unit 51, passes into chromatographic column detect by the sample after quantitative ring 512 samplings; After quantitatively ring 512 samplings finish, control module is controlled switch unit 31 and is disconnected the stream between injection ports 11 and chromatogram detecting unit 51 and connect injection port 11 and for the stream between sample unit 41, control module is controlled switch unit 31 is connected the common interface O mouth of multi-channel direction selecting valve 311 and the standby sample device of one of them sky, sample is stored to standby sample, until testing result is lower than preset value X, control module is controlled switch unit 31 and is disconnected the stream between injection port 11 and standby sample unit 41, and standby sample finishes;
When switch unit 31 switches stream, control module all gathers corresponding temporal information;
Return to steps A.
Described preset value X can arrange according to actual condition.
If desired obtain sample leak case, the sample of the storage by sample unit can be taken back to laboratory and detect.
The present embodiment is for detection of airborne benzene homologues, and X is 17mg/m
3(with reference to GB16297-1996).
This patent detecting device continues Real-Time Monitoring sample message, obtains the total concentration of sample, and concentration change trend; In high concentration, reveal moment, the content of each composition in chromatogram detecting unit detection of leaks moment sample;
Sample in standby sample unit is detected, can obtain the situation of sample in the whole leakage time period, conveniently carry out sample and trace to the source;
Thus, by the present invention, can obtain the various sample messages corresponding with the time, information is comprehensive, to administrative service division, provides comprehensive and accurate reference.
Standby sample unit opens and closes in time according to Real-time Monitoring Data, avoid standby sample not in time or the opening time oversize and cause the dilution of sample; Make to carry out according to the testing result of standby sample unit the information that sample traces to the source more accurate.
System intialization can arrange according to actual condition; Flexibility ratio is high.
Valve road switched system can carry out flexibly high lower range concentration sampling analysis and switch, and can support a plurality of collections to sample for original mold piece in a plurality of standby samples unit.
Embodiment 2
Refer to Fig. 2, a kind of high concentration substance detecting apparatus, different from the high concentration substance detecting apparatus described in embodiment 1:
1, the present embodiment chromatogram detecting unit 52 also comprises enrichment pipe 521.
If testing result is lower than preset value X, control module is controlled chronologically switch unit 31 and is connected, disconnects the stream between injection port and chromatogram detecting unit, and further controls selective enrichment pipe detecting pattern.Enrichment pipe sampling pattern is when meeting low concentration sample, and the quantitative test of carrying out one-component detects, and obtains the concentration information of one-component, convenient concentration of component variation tendency is monitored.
2, the present embodiment high concentration substance detecting apparatus also comprises alarm unit (not marking in the drawings), and control module is controlled alarm unit according to the testing result of detecting device and sent warning message; Or control module also monitors standby sample unit for the duty of sample device, if standby sample device has been finished in the time of can not continuing standby sample, alarm unit sends warning message.
The present embodiment also provides a kind of high concentration substance detecting method, different from the high concentration substance detecting method described in embodiment 1:
1,, in steps A, adopt the high concentration substance detecting apparatus of the present embodiment;
If 2 testing results are lower than preset value X, control module is controlled chronologically switch unit 31 and is connected, disconnects the stream between injection port and chromatogram detecting unit, and further controls selective enrichment pipe detecting pattern.
If testing result is higher than preset value X, control module is controlled alarm unit and is generated warning message, and sends warning; Meanwhile, control the stream that switch unit 31 is connected between injection port 11 and chromatogram detecting unit 52, select quantitatively ring detecting pattern.
Control module is also monitored standby sample unit for the duty of sample device, if standby sample unit, in abnormal work state,, is finished for sample device, alarm unit sends warning message, and prompting staff changes standby sample device in time.
Employing enrichment pipe and quantitatively ring, carry out sample collection to low concentration and high concentration leakage component respectively, quantitative wide ranges, and testing result is accurate.
Embodiment 3
A high concentration substance detecting apparatus, different from the high concentration substance detecting apparatus described in embodiment 2:
Control module is also controlled switch unit is connected standby sample unit between detecting with chromatogram, so that chromatogram detecting unit detects for the sample message in sample unit.
The present embodiment also provides a kind of high concentration substance detecting method, different from the high concentration substance detecting method described in embodiment 2: also to comprise step C, control module control switch unit is connected between making to detect with chromatogram for sample unit, with chromatogram detecting unit, detects the sample message in standby sample unit.
Above-mentioned embodiment should not be construed as limiting the scope of the invention.Key of the present invention is: sample message is detected in real time, if when high concentration being detected and leaking, start chromatogram and detect, simultaneously to sample for sample.Met department for administrative supervision and high concentration has been revealed to the monitoring requirement of sample.In the situation that not departing from spirit of the present invention, within any type of change that the present invention is made all should fall into protection scope of the present invention.
Claims (12)
1. a high concentration substance detecting apparatus, comprising:
Injection port, described injection port is connected with detecting device with described switch unit;
Detecting device, described detecting device detects the sample message entering from injection port in real time;
Switch unit, described switch unit is also connected with control module with standby sample unit, chromatogram detecting unit, and described switch unit is realized the break-make between standby sample unit, chromatogram detecting unit, injection port under the control of control module;
Standby sample unit, for stored sample when being connected between standby sample unit and injection port;
Chromatogram detecting unit, described chromatogram detecting unit for detecting sample message when being connected between chromatogram detecting unit and injection port;
Control module, described control module is also connected with detecting device, for controlling switch unit according to the testing result of detecting device.
2. high concentration substance detecting apparatus according to claim 1, it is characterized in that: described high concentration substance detecting apparatus also comprises alarm unit, described control module sends warning message according to the working state control alarm unit of the testing result of detecting device/standby sample unit.
3. high concentration substance detecting apparatus according to claim 1, is characterized in that: described chromatogram detecting unit comprises quantitative ring and/or enrichment pipe.
4. high concentration substance detecting apparatus according to claim 1, is characterized in that: described standby sample unit comprises Soviet Union's code tank.
5. high concentration substance detecting apparatus according to claim 1, is characterized in that: the detecting device in described detecting device and chromatogram detecting unit is same detecting device.
6. a high concentration substance detecting method, comprises the following steps:
A, sample enter detecting device from injection port and detect;
B, detecting device pass to control module by testing result, and control module compares testing result and preset value:
If testing result is higher than preset value, control module is controlled switch unit and is connected the stream between injection port and chromatogram detecting unit, detects sample message; Control module is controlled switch unit and is connected the stream between injection port and standby sample unit, and sample is stored to standby sample, until testing result is lower than preset value, control module is controlled switch unit and disconnected injection port and stream between sample unit, for sample, finishes;
When switch unit switches stream, control module all gathers corresponding temporal information;
Return to steps A.
7. high concentration substance detecting method according to claim 6, is characterized in that: described testing result is higher than preset value or standby sample unit can not standby sample time, and control module is controlled alarm unit and sent warning message.
8. high concentration substance detecting method according to claim 6, it is characterized in that: in step B, if testing result is lower than preset value, control module is controlled chronologically switch unit and is connected, disconnects the stream between injection port and chromatogram detecting unit, detects sample message.
9. high concentration substance detecting method according to claim 6, it is characterized in that: described high concentration substance detecting method also comprises step C, control module is controlled switch unit and is connected the stream between standby sample unit and chromatogram detecting unit, and chromatogram detecting unit is detected the sample in standby sample unit.
10. high concentration substance detecting method according to claim 6, is characterized in that: described chromatogram detecting unit comprises quantitative ring and/or enrichment pipe.
11. high concentration substance detecting apparatus according to claim 6, is characterized in that: described standby sample unit comprises Soviet Union's code tank.
12. high concentration substance detecting apparatus according to claim 6, is characterized in that: the detecting device in described detecting device and chromatogram detecting unit is same detecting device.
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| CN105749583A (en) * | 2014-12-16 | 2016-07-13 | 中国科学院大连化学物理研究所 | General preparative two-dimensional liquid chromatography device and operation method thereof |
| CN108489875A (en) * | 2018-02-06 | 2018-09-04 | 济宁中科云天环保科技有限公司 | A kind of pollutant traceability system and method based on period statistical analysis |
| CN108918899A (en) * | 2018-05-18 | 2018-11-30 | 北京大学深圳研究生院 | A kind of high throughput screening system of chemical reaction, device and method |
| CN110208391A (en) * | 2018-06-12 | 2019-09-06 | 上海炫一电气有限公司 | It is a kind of for detecting the detection device of volatile organic matter in air |
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