CN102788785A - Device for quickly detecting concentration of chlorine dioxide in air - Google Patents
Device for quickly detecting concentration of chlorine dioxide in air Download PDFInfo
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- CN102788785A CN102788785A CN2012103088299A CN201210308829A CN102788785A CN 102788785 A CN102788785 A CN 102788785A CN 2012103088299 A CN2012103088299 A CN 2012103088299A CN 201210308829 A CN201210308829 A CN 201210308829A CN 102788785 A CN102788785 A CN 102788785A
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Abstract
The invention discloses a device for quickly detecting concentration of chlorine dioxide in air. The device comprises gas channels, a chemical luminous reactor, an optical signal detector, a signal recorder and a signal processor. The gas channels include an intake channel and an exhaust channel. The intake channel and the exhaust channel are communicated with the chemical luminous reactor respectively. The optical signal detector is used for detecting strength of optical signals in the chemical luminous reactor during chemical reaction and sending the signals to the signal recorder outside the chemical luminous reactor. The signal recorder is connected with the signal processor through an interface so as to calculate concentration of chlorine dioxide in air. The device for quickly detecting concentration of chlorine dioxide in air is suitable for detection of concentration of chlorine dioxide within the concentration range from 60 mg/L to 140 mg/L. Quick on-site detection can be achieved instead of detecting after collecting air containing chlorine dioxide.
Description
Technical field
The present invention relates in the relative closure space environment detection technique field of sterilizing gas in the public health security air, be specifically related to the device of gas chlorine dioxide concentration in a kind of fast detecting air.
Background technology
In the main in the world at present infectious disease, air-borne transmission account for various pathophorous first places.Infectious diseases such as the SARS from the most dangerous chemical and biological weapons one respiratory anthrax to new life, bird flu; And meningococal meningitis, mumps, viral pneumonia, influenza, common cold, acpuei pharyngitis, pulmonary tuberculosis, scarlet fever, legionaires' disease, pertussis, diphtheria, measles, smallpox, varicella etc. all are by air borne and can be through airborne; In a single day these infectious diseases are broken out, and will cause serious consequence.Therefore, air sterillization is the prevention and control infections sources, prevents the important measures of cross-infection.Especially to personnel concentrate relatively as carrying out the air prophylactic disinfection than the public place of large space environment and terminal disinfection seems particularly important in hospital, library etc.; Effectively air sterillization can be killed the pathogenic microorganism of being infected with on the airborne suspended particle within a certain period of time, can in the prevention and control of diseases process, play a key effect.
Chlorine dioxide has obtained using widely in water treatment, medical treatment, food service industry as a kind of strong oxidizer and high effect disinfectants.In recent years, chlorine dioxide was because its outstanding disinfection effect had been applied to the anti-terrorism field, to effectively cleaning in the place that attacked by the biological and chemical weapon or to pollute.
With respect to the liquid chlorine dioxide; The gas chlorine dioxide is because its excellent high-efficiency broad spectrum bactericidal property and lower has toxic byproduct; Being used for air sterillization is new control, a Prevention Technique that is easy to the large tracts of land use, is specially adapted to the sterilizing to microorganism in the large area space environment.The gas chlorine dioxide is except being applied to the sterilizing of space environment microorganism in public health fields such as hospital, libraries; Also can be widely used in the sterilization of booth vegetable, fruit; To replace traditional agricultural chemical insecticide; Improve the foodsafety of fruits and vegetables, in the mould mildew-resistant that removes of grain storage repository, many fields such as control of forest and crop diseases and pest also have extremely wide application prospect simultaneously.Yet, when airborne chlorine dioxide concentration is too high,, also have certain explosion hazard except that human organ is had the intense stimulus effect.Therefore, in order to ensure people's in production and the use safety of life and property, must carry out strictness monitoring and control to the concentration of chlorine dioxide in the air.
At present; Checkout equipment for chlorine dioxide in the air and concentration thereof does not also have better method; Existing a spot of bibliographical information also is that the air of taking to close chlorine dioxide with the air sampler collection is dissolved in the absorbing agent water mostly, and the concentration that absorbs chlorine dioxide in the water sample through spectrophotometry reverts to airborne chlorine dioxide concentration then.The advantage of this method is that test value is relatively accurate, its shortcoming: the one, and the chlorine dioxide of only suitable air middle and high concentration detects, and is powerless for the chlorine dioxide detection of low concentration; The 2nd, can not realize on-the-spot fast the detection, can not in time control the chlorine dioxide in the correlation space surrounding air like this, there is hysteresis quality in detection method, can not satisfy practical application.
Summary of the invention
The device of chlorine dioxide gas concentration in the fast detecting air; Comprise gas circuit, chemiluminescence reaction device, optical signal detector, signal recorder and signal processing apparatus; Gas circuit comprises air inlet gas circuit and exhaust gas circuit; Air inlet gas circuit and exhaust gas circuit are communicated with the chemiluminescence reaction device respectively; Light signal strength and the signal recorder to chemiluminescence reaction device outside that optical signal detector is used to survey when in the chemiluminescence reaction device chemical reaction taking place send signal, and signal recorder is connected with signal processing apparatus through interface, and signal processing apparatus is used for calculating the concentration of air chlorine dioxide.
Preferably; The air inlet gas circuit comprises air gas circuit, nitrogen and sulfuretted hydrogen gas circuit; Its air gas circuit comprises the air intake opening that connects successively; First flow meter, first needle valve and be positioned at the first inner gas vent of chemiluminescence reaction device, nitrogen and sulfuretted hydrogen gas circuit comprise high-pressure nitrogen bottle, high pressure of hydrogen sulfide gas cylinder, second, third, the 4th needle valve, second flow take into account second gas vent, two gas cylinders are connected with second, third needle valve respectively through pipeline and then are connected with second flowmeter; Second flowmeter is connected with the 4th needle valve; The 4th needle valve connects the second inner gas vent of chemiluminescence reaction device through pipeline, and first and second gas vents are in same axis, spacing 3mm.
Preferably, the exhaust gas circuit comprise successively be communicated be positioned at chemiluminescence reaction device gas inside escape hole, the 5th needle valve, surge chamber, the 6th needle valve and vacuum pump.
Preferably; The chemiluminescence reaction device comprises enclosed reaction vessel main body, electronic vacuum tensimeter and convex lens and convergent hole; Convex lens are positioned at the inner end of reaction cell body; Convergent hole is arranged on the sidewall of the reactor body that is provided with quartzy convex lens one side, and the position of convex lens and convergent hole is corresponding.
Preferably, optical signal detector is arranged on the outside of convergent hole.
Preferably, the first, the 4th and the 5th needle valve is a retaining valve.
Preferably, anti-chemiluminescence reaction device main body is processed by opaque PVC-U (UPVC) pipe fitting, and convex lens are quartzy material, and reactor body uses screwed dividing plate joint to be connected with the pipeline of gas circuit, and optical signal detector is a ultraviolet light transducer.
Preferably, at first utilize N
2Air in the chemical light reactor is replaced, and removes the foreign gas that wherein influences chemiluminescence reaction; Utilize the indoor negative pressure of vacuum pump conditioned reaction again, make it to reach the required pressure of experiment; Make ClO
2Gas and excessive H
2S gas feeds in the reaction cell body, two kinds of gas generation chemiluminescence reactions; The light signal that reaction is produced sees through convergent hole by the optical signal detector collection after quartzy convex lens converge, and gives signal recorder with the optical signal transmission that difference is collected constantly; In the data importing computer in the signal recorder, draw out different light signals constantly change curve in time, curve lower integral area is represented the light signal total intensity I that is produced in the chemiluminescence process
CL, simulate different ClO
2Gas concentration c and light signal total intensity I
CLBetween linear relation:
I
CLTotal chemiluminescence intensity of expression entire reaction; K representes the test condition constant or as the tolerance of sensitivity; C is determinand ClO
2Concentration; C is an integration constant.
The equipment of chlorine dioxide gas concentration is applicable to the chlorine dioxide concentration in the 60-140mg/L concentration range is detected in the fast detecting air of the present invention, need not to gather earlier the air that contains chlorine dioxide and detects and can realize on-the-spot fast the detection.
Description of drawings
Fig. 1 is the schematic representation of apparatus of chlorine dioxide gas concentration in the fast detecting air of the present invention
Embodiment
According to gas chlorine dioxide (ClO
2) and sulfuretted hydrogen (H
2S) characteristics of chemiluminescence reaction are used for detecting air ClO
2The device of gas concentration, concrete is exactly through detecting ClO
2With H
2The light signal strength that the S chemiluminescence reaction is produced is measured ClO
2Concentration.
As shown in Figure 1, this device comprises gas circuit, chemiluminescence reaction device and optical signal detector, signal recorder and signal processing apparatus (not shown).Air path part can be divided into air inlet gas circuit (2,3,4,5,6,7,9,14,15,16,17) and exhaust gas circuit (18,19,20,21) again.Air inlet gas circuit and exhaust gas circuit are communicated with the chemiluminescence reaction device respectively.The air inlet gas circuit comprises air gas circuit, nitrogen and sulfuretted hydrogen gas circuit, and nitrogen and sulfuretted hydrogen gas circuit comprise that volume is 5 liters high-pressure nitrogen bottle 2, the high pressure H that volume is 3 liters
2S gas cylinder 3, second, third, the 4th needle valve (4,5,7), flowmeter 6 and second gas vent 9.High-pressure nitrogen bottle 2 and high pressure H
2The S gas cylinder connects the back with second, third needle valve (4,5) respectively through pipeline and is connected with second flowmeter 6, and second flowmeter 6 is connected with the 4th needle valve 7, and the 4th needle valve 7 is connected in the second inner gas vent 9 of chemiluminescence reaction device through pipeline.The air gas circuit comprises the air intake opening 17 that connects successively, first flow meter 16, first needle valve 15 and first gas vent 14 that is positioned at said chemiluminescence reaction device inside.Each needle valve is used to regulate the gas flow rate that gets in the reaction chamber, and two flowmeters are controlled respectively and got into the gas reactor flow.First gas vent 9 and second gas vent 14 are in same axis, and spacing 3mm is beneficial to photochemically reactive instantaneous carrying out.The exhaust gas circuit comprises successively the gas discharge outlet that is communicated with 22, the 5th needle valve 18, surge chamber 19, the 6th needle valve 20 and vacuum pump 21.It is inner that gas discharge outlet 22 is arranged at the chemiluminescence reaction device, and the pressure that vacuum pump 21, the 5th needle valve 18, the 6th needle valve 20 and surge chamber 19 are used to keep in the reactor is stable, simultaneously combustion gas.
The chemiluminescence reaction device comprises reaction cell body 1, electronic vacuum tensimeter 8 and convex lens 10 and the convergent hole 13 of sealing.Convex lens 10 are positioned at an end of reactor body 1 inside, and convergent hole 13 is arranged on the sidewall of the reactor body that is provided with quartzy convex lens one side, and convex lens 10 are corresponding with the position of convergent hole 13.Convex lens adopt quartzy material.Because chemiluminescent signal is comparatively faint, increases the receipts light rate that quartzy convex lens help to improve sensor, strengthen light signal strength.Optical signal detector 12 optical signal detectors 12 are arranged on the outside of convergent hole 13, and light signal strength when being used in the detection reaction device chemical reaction taking place and the signal recorder 11 to chemiluminescence reaction device outside send signals.Signal recorder 11 is used for the collection and the record of signal, and signal recorder 11 is connected with signal processing apparatus through interface, and signal processing apparatus can be computer, is used for deal with data, calculates the concentration of chlorine dioxide.
At first utilize N
2Air in the chemiluminescence reaction device is replaced, and removes the foreign gas that wherein possibly influence chemiluminescence reaction.Utilize vacuum pump 21 to regulate negative pressure in the chemiluminescence reaction device again, make it to reach the required pressure of experiment.In the chemiluminescence reaction device, have under certain condition of negative pressure, regulate second, third, the valve of the 4th needle valve (4,5,7) and flowmeter 6 carries out dual regulation to gas flow rate, to obtain comparatively stable air inlet speed.Under the stable situation of chemiluminescence reaction device pressure, induction air flow ratio, with ClO
2Gas and excessive H
2S gas feeds in the chemiluminescence reaction device, two kinds of gas generation chemiluminescence reactions.The light signal that reaction is produced sees through convergent hole 13 and is gathered by photo-detector 12 after quartzy convex lens converge, and gives signal recorder 11 with the optical signal transmission that difference is collected constantly.In the data importing computer in the signal recorder 11, utilize OriginPro8.0 to draw out different light signals constantly change curve in time, curve lower integral area is represented the light signal total intensity I that is produced in the chemiluminescence process
CLJust can simulate different ClO
2Gas concentration c and light signal total intensity I
CLBetween linear relation:
I
CLTotal chemiluminescence intensity of expression entire reaction; K representes the test condition constant, also can be used as the tolerance of sensitivity; C is determinand ClO
2Concentration; C is an integration constant.The relation that this formula reflected is ClO
2Gas and H
2The light signal strength of S aerochemistry luminescence-producing reaction is proportional to reactant ClO
2Gas concentration can detection by quantitative ClO
2Gas concentration.
According to ClO
2And H
2The S chemical reaction characteristic, the structure of reaction chamber possesses following characteristic:
1) impermeability
ClO
2And H
2The S chemiluminescence reaction is only carried out under negative pressure and is produced luminescence phenomenon.Can under comparatively stable negative pressure, carry out in order to guarantee chemiluminescence reaction; The present invention all uses the dividing plate joint to be threaded with reactor body at the pipeline of the gas circuit of chemiluminescence reaction device; The first, the 4th and the 5th needle valve (7,15,18) is the gas unidirectional valve, is provided with rubber washer in the junction of quartzy convex lens and reactor body simultaneously.Use vacuum pump 21 to regulate the interior pressure of chemiluminescence reaction device to 0.05MPa; Close the first, the 4th and the 5th needle valve (7,15,18); Observe digital display pressure vacuum gauge 8 basicly stable not variation on the 0.05MPa registration in 30s, behind 2min, pointer just makes zero.In view of the above, can think that the impermeability of chemiluminescence reaction device is enough to guarantee the stable of in course of reaction pressure.
2) the close property of light
Because what photo-detector 12 was gathered is light signal, for fear of the interference of extraneous light, simultaneously in order to increase the absorbing light efficient of photo-detector 12, the chemiluminescence reaction device must have the close property of reliable light.Reactor body 1 part of the present invention is processed into by opaque PVC-U (UPVC) pipe fitting.Photo-detector 12 is put into the deep gouge that reactor body 1 rear portion is provided with, and circular detector receives the light signal that from quartzy convex lens, transmits over against convergent hole 13.
3) corrosion resistance
ClO
2Have very strong oxidisability, thus the material selection of reactor body of the present invention not with ClO
2The UPVC that reacts has good corrosion resistance.
4) temperature
In theory, improve temperature of reaction and can increase reaction rate and reaction efficiency, but because gas ClO
2Have decomposition explosion danger, the consideration from the device security does not increase heating arrangement in the chemiluminescence reaction device of the present invention.Through experiment confirm, ClO at normal temperatures
2With H
2The gas chemistry luminescence-producing reaction of S still can be carried out.
5) sensor
Because ClO
2With H
2The maximum emission wavelength that the S chemiluminescence reaction is produced is about 328nm, so photo-detector adopts the harvester of the SFH530-R ultraviolet light transducer of German OSRAM company as light signal.The SFH530-R ultraviolet light transducer has the advantages that volume is little, detect ultraviolet light sensitivity, low-power consumption, life-span length; Its main response region has covered the wavelength band of long wave ultraviolet (400nm-315nm) and ultraviolet B radiation (315nm-280nm) basically, has satisfied test request.
6) signal recorder
Because chemiluminescence reaction very rapidly, and be not successive reaction, so whole luminescence-producing reaction process generally can only be kept several seconds (s) even hundreds of millisecond (ms), so signal recorder 11 need be provided with suitable signals collecting duration and frequency acquisition.Again with difference light signal strength constantly, the reaction time is carried out integration, just obtain the light signal total intensity in the certain hour.The signals collecting duration is unsuitable long, is because the luminescence process time is shorter on the one hand, is owing to the increase along with acquisition time on the other hand, and the temperature of sensor raises, and institute produces to such an extent that background signal also can strengthen, and influence output is precision as a result.The signals collecting frequency adjustable scope of signal recorder 11 links to each other with computer through the RS232 interface, to data collection, preservation and processing between 4-1000Hz.
7) other is in order to improve ClO
2And H
2The mixing efficiency of two kinds of gases of S, second gas vent 9 and the coaxial placement in reactor body 1 of first gas vent 14, and apart is about 3mm, two kinds of gases fully mixed and complete reaction., be used for the light signal in the chemiluminescence reaction device is converged with the fixing quartzy convex lens of the flange of liner silicagel pad at reactor body 1 rear portion, and carry out signals collecting through the convergent hole 13 that diameter is about 7mm.The present invention selects for use quartzy material convex lens to be because ClO
2With H
2The photon wavelength scope that the gas chemistry luminescence-producing reaction of S is produced is between 250-460nm, and maximum emission wavelength is about 328nm, near ultraviolet region.Compare other material lens, quartzy material has reached 99% for the transmissivity of ultraviolet light, a little less than the influence to light signal.
More than specific descriptions of the present invention are intended to explain the implementation of specific embodiments can not be interpreted as it is limitation of the present invention.Those of ordinary skills can make various variants on the basis of the embodiment that details under instruction of the present invention, these variants all should be included within the design of the present invention.
Claims (8)
1. the device of chlorine dioxide gas concentration in the fast detecting air; Comprise gas circuit, chemiluminescence reaction device, optical signal detector, signal recorder and signal processing apparatus; Gas circuit comprises air inlet gas circuit and exhaust gas circuit; Air inlet gas circuit and exhaust gas circuit are communicated with the chemiluminescence reaction device respectively; Light signal strength and the signal recorder to chemiluminescence reaction device outside that optical signal detector is used to survey when in the chemiluminescence reaction device chemical reaction taking place send signal, and signal recorder is connected with signal processing apparatus through interface, and signal processing apparatus is used for calculating the concentration of air chlorine dioxide.
2. device as claimed in claim 1; It is characterized in that: said air inlet gas circuit comprises air gas circuit, nitrogen and sulfuretted hydrogen gas circuit; Its air gas circuit comprises successively the air intake opening (17) that is communicated with, first flow meter (16), first needle valve (15) and be positioned at inner first gas vent (14) of said chemiluminescence reaction device, said nitrogen and sulfuretted hydrogen gas circuit comprise high-pressure nitrogen bottle (2), high pressure of hydrogen sulfide gas cylinder (3), second, third, the 4th needle valve (4; 5; 7), second flowmeter (6) and second gas vent (9), said high-pressure nitrogen bottle (2) and high pressure of hydrogen sulfide gas cylinder (3) connect the back with second, third needle valve (4,5) respectively through pipeline and are connected with second flowmeter (6); Second flowmeter (6) is connected with the 4th needle valve (7); The 4th needle valve (7) is connected in inner second gas vent (9) of said chemiluminescence reaction device through pipeline, and said first and second gas vents (9,14) are in same axis, spacing 3mm.
3. according to the device of claim 2; It is characterized in that: said exhaust gas circuit comprise successively be communicated be positioned at said chemiluminescence reaction device gas inside escape hole (22), the 5th needle valve (18), surge chamber (19), the 6th needle valve (20) and vacuum pump (21).
4. device according to claim 1 and 2; It is characterized in that: said chemiluminescence reaction device comprises enclosed reaction vessel main body (1), electronic vacuum tensimeter (8), convex lens (1O) and convergent hole (13); Convex lens (10) are positioned at the inner end of reactor body (1); Convergent hole (13) is arranged on the sidewall of the reactor body that is provided with quartzy convex lens one side, and convex lens (10) are corresponding with the position of convergent hole (13).
5. device according to claim 4 is characterized in that, said optical signal detector (12) is arranged on the outside of convergent hole (13).
6. device according to claim 4, said the first, the 4th and the 5th needle valve (15,7,18) is a retaining valve.
7. according to the device of claim 5, it is characterized in that: said anti-chemiluminescence reaction device main body (1) is processed by opaque PVC-U pipe fitting, and convex lens (10) are quartzy material, and said optical signal detector (12) is a ultraviolet light transducer.
8. according to claim 5 or 6 or 7 described devices, it is characterized in that: at first utilize N2 that the air in the chemical light reactor is replaced, remove the foreign gas that wherein influences chemiluminescence reaction; Utilize vacuum pump to regulate negative pressure in the chemiluminescence reaction device again, make it to reach the required pressure of experiment; Make ClO
2Gas and excessive H
2S gas feeds in the reaction cell body (1), two kinds of gas generation chemiluminescence reactions; The light signal that reaction is produced sees through convergent hole (13) and is gathered by optical signal detector (12) after quartzy convex lens converge, and gives signal recorder (11) with the optical signal transmission that difference is collected constantly; In the data importing signal processing apparatus in the signal recorder (11), draw out different light signals constantly change curve in time, curve lower integral area is represented the light signal total intensity I that is produced in the chemiluminescence process
CL, simulate different ClO
2Gas concentration c and light signal total intensity I
CLBetween linear relation:
I
CLTotal chemiluminescence intensity of expression entire reaction; K representes the test condition constant or as the tolerance of sensitivity; C is determinand ClO
2Concentration; C is an integration constant.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103088299A CN102788785A (en) | 2012-08-28 | 2012-08-28 | Device for quickly detecting concentration of chlorine dioxide in air |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103088299A CN102788785A (en) | 2012-08-28 | 2012-08-28 | Device for quickly detecting concentration of chlorine dioxide in air |
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| CN2012103088299A Pending CN102788785A (en) | 2012-08-28 | 2012-08-28 | Device for quickly detecting concentration of chlorine dioxide in air |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645146A (en) * | 2013-11-16 | 2014-03-19 | 中山欧麦克仪器设备有限公司 | Chlorine dioxide detection device |
| CN105158184A (en) * | 2015-09-11 | 2015-12-16 | 深圳世绘林科技有限公司 | Gas online analysis device based on optical integrating sphere |
| CN106763924A (en) * | 2015-11-20 | 2017-05-31 | 力晶科技股份有限公司 | Check valve and system for preventing gas from backflushing |
| CN107402232A (en) * | 2017-08-11 | 2017-11-28 | 中北大学 | The dynamic blast absolute rating assay method of fuel gas |
| CN113533324A (en) * | 2020-04-16 | 2021-10-22 | 广东润鹏生物技术有限公司 | Optical detection mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645146A (en) * | 2013-11-16 | 2014-03-19 | 中山欧麦克仪器设备有限公司 | Chlorine dioxide detection device |
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| CN107402232A (en) * | 2017-08-11 | 2017-11-28 | 中北大学 | The dynamic blast absolute rating assay method of fuel gas |
| CN113533324A (en) * | 2020-04-16 | 2021-10-22 | 广东润鹏生物技术有限公司 | Optical detection mechanism |
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Application publication date: 20121121 |