CN102178968A - Chlorine dioxide gas disinfection device - Google Patents
Chlorine dioxide gas disinfection device Download PDFInfo
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- CN102178968A CN102178968A CN2011101048199A CN201110104819A CN102178968A CN 102178968 A CN102178968 A CN 102178968A CN 2011101048199 A CN2011101048199 A CN 2011101048199A CN 201110104819 A CN201110104819 A CN 201110104819A CN 102178968 A CN102178968 A CN 102178968A
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Abstract
The invention discloses a chlorine dioxide gas disinfection device, which has the characteristics of quick and thorough disinfection, no corrosion or residue, compact structure, convenience of operation, visible and controllable disinfection process, simple maintenance and the like. The chlorine dioxide gas disinfection device comprises a chlorine dioxide gas generating device, an online concentration detection device, a man-machine interactive platform, and an auxiliary pipeline, wherein the man-machine interactive platform is respectively connected with the chlorine dioxide gas generating device, the online concentration detection device and the auxiliary pipeline; and a detection pipeline provided with a temperature sensor, the online concentration detection device and a circulating fan in turn is communicated with a disinfection space and a chlorine dioxide delivery pipeline respectively. The chlorine dioxide gas disinfection device can be used for high-level disinfection on occasions such as biosafety laboratories, experimental animal rooms, biosafety cabinets, contagious wards, operating rooms, high-efficiency air filter units and the like.
Description
Technical field
The present invention relates to a kind of broad-spectrum disinfectant device, exactly is a kind of disinfection by chlorine dioxide of gas efficiently device that is widely used in high-grade biocontainment laboratory, operating room, Biohazard Safety Equipment.
Background technology
Chlorine dioxide is a kind of wide spectrum of The World Health Organization's affirmation, efficient, nontoxic disinfection sanitizer, have sterilization wide spectrum, advantages such as valid density is low, speed of action is fast, nontoxic, safe in utilization, noresidue, extensively be applied to fields such as water treatment, food processing, medical treatment, vegetable and fruit be fresh-keeping as disinfection sanitizer, food preservative, water quality cleansing agent.In recent years, the gas chlorine dioxide is because advantages such as its sterilization noresidue, environmental protection, disinfection cycle weak points, being used for space disinfection more and more attempts, experiment shows, in designated space, only need contain the gas chlorine dioxide of enough concentration, can kill various viruses, antibacterial and spore by its strong oxidation.After the serial anthrax bacillus attack after the U.S. " 911 " attack of terrorism, the gas chlorine dioxide is used to the thorough disinfection to huge buildings such as Anthrax, AMI mansion, Trenton post offices, and some other biocontainment laboratory, Biohazard Safety Equipment, infectious hospital's operating room disinfectant example also are seen in report.
The gas chlorine dioxide is used for space disinfection must solve two key problems: the scene generation of gas chlorine dioxide and the real-time monitoring of disinfecting process gas chlorine dioxide concentration and other parameters.Owing to gas chlorine dioxide character instability, therefore explosive when easy decomposition, high concentration is difficult for storing and transporting, and can only produce preparation at the scene nearby, as early as possible use.Gas chlorine dioxide concentration and sterile environment humiture are very big to the Disinfection Effect influence, therefore should keep constant gas chlorine dioxide concentration and humiture as far as possible in disinfecting process.
Patent CN 101024492A has announced a kind of gas chlorine dioxide generation method and decontaminating apparatus, is raw material with sodium chlorate solution and concentrated hydrochloric acid, reacts under the condition that feeds hot-air in reaction system.Though this method has reduced the manufacturing cost of chlorine dioxide, but reactions steps complexity, the system condition harshness, and adopt concentrated hydrochloric acid as raw material, strict to reaction vessel and pipeline, and have the problems such as removal difficulty of volatility HCl gas, therefore be not suitable for the preparation of space disinfection with the gas chlorine dioxide.
Application number is that 200620023427.4 patent has been described a kind of chlorine dioxide sterilizing machine that produces constant density, comprise ClO 2 solution generator and chlorine dioxide gas generating apparatus, by the chlorine dioxide in the solution is gasified under the effect of many steps stripping device through activator activation back, produce the gas chlorine dioxide.Though this device can obtain comparatively stable dissolving chlorine dioxide gasification rate, but need a plurality of parts to unite use, complex structure, and high concentration of chlorine dioxide solution itself has explosive, is difficult for the danger of longer-term storage, therefore has certain application limitation.
United States Patent (USP) 2000/6042802 has been announced a kind of gas disinfection by chlorine dioxide machine, adopts concentrated hydrochloric acid and sodium chlorite solution to prepare the gas chlorine dioxide at special reaction vessel internal reaction, adopts photometry on-line real time monitoring gas chlorine dioxide concentration.There is concentrated hydrochloric acid to participate in the process of this invention preparation gas chlorine dioxide, therefore must use strict etch-proof special material preparation feedback container, and reaction residue needs special handling, whole sterilizing machine complex structure, there is certain application risk in the maintenance difficulty.
Day JP2005224386 of the present invention (A) has described a kind of chlorine dioxide gas sterilizing unit, thereby discharge the gas chlorine dioxide on the gel of its employing ultraviolet radiation dissolution of high-concentration chlorine dioxide, can in consume low amounts of power, supply with the chlorine dioxide of concentration stabilize long-term and stably.But the high concentration gel needs prepared beforehand, and the concentration poor controllability takes place, and can't realize offseting the accurate control of Conium maculatum L. number and process.
Summary of the invention
The gas in situ preparation, disinfecting process that the objective of the invention is to solve gas chlorine dioxide space disinfection be the problem of monitoring in real time, provide a kind of have sterilization rapidly thoroughly, do not have corrosion and residual, compact conformation, simple operation, disinfecting process visual controlled, be easy to characteristics gas disinfection by chlorine dioxide device such as maintenance.
Gas disinfection by chlorine dioxide device of the present invention comprises gas chlorine dioxide generating device, online concentration detection apparatus, man-machine interactive platform and auxiliary piping; Man-machine interactive platform is connected with auxiliary piping with gas chlorine dioxide generator, online concentration detection apparatus respectively; Described gas chlorine dioxide generating device comprises three reactor, Ha Shi decompressor, compression chlorine/nitrogen mixture bottle and mass flowmenter, compression chlorine/nitrogen mixture bottle is connected with the three reactor front end by the gaseous mixture air inlet pipeline that sets gradually Ha Shi decompressor, gaseous mixture air inlet electromagnetic valve and mass flowmenter, compression chlorine/nitrogen mixture bottle is connected with the gaseous mixture air inlet pipeline by the scavenging pipeline that purge solenoid valve is set, and the three reactor rear end is by chlorine dioxide air duct UNICOM disinfection space; The signal piping that sets gradually temperature sensor, online concentration detection apparatus and circulating fan respectively with disinfection space and chlorine dioxide air duct UNICOM; Online concentration detection apparatus is by light source, collimating lens, spectroscope, air chamber, detect condenser lens, with reference to condenser lens, reference detector, detect detector, light source driving circuit, signal processing circuit, analog to digital conversion circuit, control unit and miscellaneous function unit are formed, described light source, collimating lens, spectroscope, air chamber, the center of detecting condenser lens and detection detector is arranged in order at same horizontal plane, described spectroscope becomes 45 degree to install with incident parallel rays, the spectroscope below sets gradually with reference to condenser lens and reference detector, on the described air chamber, lower surface is provided with gas feed and gas outlet respectively; Light source driving circuit connects light source, and signal processing circuit connects reference detector respectively, detects detector and analog to digital conversion circuit, and control unit connects analog to digital conversion circuit, light source driving circuit and miscellaneous function unit respectively; Auxiliary piping comprises that decontaminating apparatus humidification pipeline, sterilizing machine purge protection pipeline and disinfection space pressure reduction monitoring pipeline; decontaminating apparatus humidification pipeline and disinfection space pressure reduction monitoring pipeline communicate with disinfection space respectively, and sterilizing machine purges the protection pipeline and communicates with the gaseous mixture air inlet pipeline.
Described sterilizing machine scavenging pipeline is made up of nitrogen cylinder, nitrogen decompressor and nitrogen air inlet electromagnetic valve, and the compressed nitrogen gas cylinder is connected with the gaseous mixture air inlet pipeline by the nitrogen air inlet pipeline that sets gradually nitrogen decompressor and nitrogen air inlet electromagnetic valve; The humidification pipeline is made up of the humidification pipeline that sets gradually humidifier, humidification electromagnetic valve and storage tank, and the humidification pipeline connects humidifier and chlorine dioxide air duct respectively; Disinfection space pressure reduction monitoring pipe route sets gradually the detection pipeline of differential pressure pickup and high efficiency particle air filter and forms.
Described man-machine interactive platform is made up of display, PLC module, thermal printer and SD memory device, and the PLC module connects display, thermal printer, SD memory device, gaseous mixture air inlet electromagnetic valve, purge solenoid valve, nitrogen air inlet electromagnetic valve, humidification electromagnetic valve, mass flowmenter, humidifier, temperature sensor, differential pressure pickup and circulating fan respectively.
Whole decontaminating apparatus is integrated in a length and width height and is no more than in the cuboid space of 800mm * 500mm * 1400mm.
The gas chlorine dioxide generating device is used for the required chlorine dioxide that does not contain corrosive gas of in situ preparation sterilization.Online concentration detection apparatus is used for monitoring disinfecting process disinfection space gas chlorine dioxide concentration to be changed, and by the operation of feedback control generator, the gas chlorine dioxide concentration of control disinfection space keeps constant.Man-machine interactive platform is used for the monitoring and the control of sterile environment, comprise disinfection concentration, space humidity, pressure, disinfecting time, aeration time, the isoparametric input of flushing of pipeline time, gas chlorine dioxide concentration, space pressure, humidity real-time demonstration, storage and the output etc. of change curve in time in the disinfecting process.
The advantage of gas disinfection by chlorine dioxide device of the present invention is: adopt gas and solid particulate matter reaction in situ preparation gas chlorine dioxide, entire reaction course does not have water and volatility, corrosive gas to participate in, extremely be fit to space disinfection and use, while compact conformation, easy operating.Adopt the UV Absorption method to monitor gas chlorine dioxide concentration in the disinfecting process in real time, solved the accurately problem of control of gas disinfection by chlorine dioxide concentration.The present invention adopts the automatic conversion in gas chlorine dioxide concentration, humiture, pressure and each stage in the man-machine interactive platform control disinfecting process, the automatization of really having accomplished whole disinfecting process.The design of safety such as scavenging pipeline guarantees that gas disinfection by chlorine dioxide device of the present invention has higher safety in utilization.The every key technology that the present invention relates to and module organically combine, and have formed automaticity height, compact conformation, safe and reliable, Operation and Maintenance gas disinfection by chlorine dioxide device easily jointly.
Gas disinfection by chlorine dioxide device of the present invention can be used for the high level disinfection of occasions such as biocontainment laboratory, experimental animal room, Biohazard Safety Equipment, lazaretto ward, operating room, high-efficiency air filtering unit.
Description of drawings
Fig. 1 is a gas disinfection by chlorine dioxide apparatus structure flow chart;
Fig. 2 is the online concentration detection apparatus fundamental diagram of gas disinfection by chlorine dioxide device;
Fig. 3 is a sterilization indicator bacteria placement location sketch map among the gas disinfection by chlorine dioxide device embodiment.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described further.
As shown in Figure 1, the present invention includes gas chlorine dioxide generating device, online concentration detection apparatus, man-machine interactive platform and auxiliary piping; Man-machine interactive platform is connected with auxiliary piping with gas chlorine dioxide generator, online concentration detection apparatus respectively; Described gas chlorine dioxide generating device comprises three reactor 6,7 and 8, Ha Shi decompressor 21, compression chlorine/nitrogen mixture bottle 22 and mass flowmenter 5, compression chlorine/nitrogen mixture bottle is connected with the three reactor front end by the gaseous mixture air inlet pipeline that sets gradually Ha Shi decompressor, gaseous mixture air inlet electromagnetic valve 20 and mass flowmenter, compression chlorine/nitrogen mixture bottle is connected with the gaseous mixture air inlet pipeline by the scavenging pipeline that purge solenoid valve 3 is set, and the three reactor rear end is by chlorine dioxide air duct UNICOM disinfection space 13; The signal piping that sets gradually air filter 15, temperature sensor 17, online concentration detection apparatus 18 and circulating fan 19 respectively with disinfection space and chlorine dioxide air duct UNICOM; Auxiliary piping comprises that decontaminating apparatus humidification pipeline, sterilizing machine purge protection pipeline and disinfection space pressure reduction monitoring pipeline, decontaminating apparatus humidification pipeline and disinfection space pressure reduction monitoring pipeline communicate with disinfection space respectively, and sterilizing machine purges the protection pipeline and communicates with the gaseous mixture air inlet pipeline; The sterilizing machine scavenging pipeline is made up of nitrogen cylinder 1, nitrogen decompressor 2, nitrogen air inlet electromagnetic valve 4, the compressed nitrogen gas cylinder by set gradually the nitrogen decompressor with the nitrogen air inlet pipeline be connected with the gaseous mixture air inlet pipeline; The humidification pipeline comprises humidifier 10, electromagnetic valve 11 and storage tank 12, and the humidification pipeline is made up of the humidification pipeline that sets gradually humidifier, humidification electromagnetic valve and storage tank, and the humidification pipeline connects humidifier and chlorine dioxide air duct respectively; Disinfection space pressure reduction monitoring pipe route sets gradually the detection pipeline of differential pressure pickup 16 and high efficiency particle air filter 14 and forms.
Man-machine interactive platform does not embody in Fig. 1, man-machine interactive platform is made up of display, PLC module, thermal printer and SD memory device, and the PLC module connects display, thermal printer, SD memory device, gaseous mixture air inlet electromagnetic valve, purge solenoid valve, nitrogen air inlet electromagnetic valve, humidification electromagnetic valve, mass flowmenter, humidifier, temperature sensor, differential pressure pickup and circulating fan respectively.
As shown in Figure 2, the online concentration detection apparatus 18 of the present invention, comprise light source 23, collimating lens 24, spectroscope 26, air chamber 27, condenser lens 28, reference detector 25, detect detector 29, light source drives and signal processing circuit 30, PET isolating membrane 31 and 32, condenser lens 33 etc., described light source, collimating lens, spectroscope, air chamber, the center of detecting condenser lens and detection detector is arranged in order at same horizontal plane, described spectroscope becomes 45 degree to install with incident parallel rays, the spectroscope below sets gradually with reference to condenser lens and reference detector, on the described air chamber, lower surface is provided with gas feed and gas outlet respectively; Light source driving circuit connects light source, and signal processing circuit connects reference detector respectively, detects detector and analog to digital conversion circuit, and control unit connects analog to digital conversion circuit, light source driving circuit and miscellaneous function unit respectively.Described collimating lens, spectroscope, detection condenser lens, be the ultraviolet fused quartz with reference to the material of condenser lens.Reference detector and detection detector are the photodiode to 365nm ultraviolet light sensitivity.Light source adopts 365nm arrowband UV LED (UVLED), and the emission spectra scope is 360-370nm.
The light that light source sends is converted into approximate directional light through collimating lens; Converge at reference detector through the reference condenser lens after the part reflection behind the parallel rays process spectroscope and induce reference signal, through air chamber, converge at the detection detector through the detection condenser lens again and induce detection signal after another part transmission; Detection signal and reference signal are converted to digital signal through analog to digital conversion circuit after carrying out current-voltage conversion, amplification and filtering by signal processing circuit again; Control unit reads the row operation of going forward side by side of above-mentioned digital signal and obtains the concentration of chlorine dioxide.In most preferred embodiment, light source driving circuit can adopt the LED of Infineon to drive chip LT3950, in other embodiments, can adopt constant-current source chip or LED Linear Driving chip, as LT3092 or CAT4008 etc.; Control unit is a core with the enhancement mode 51 single-chip microcomputer P89LPC935 at grace intelligence Pu, perhaps adopts single-chip microcomputers such as PIC, AVR or ARM; The operational amplifier chip OPA129 of low bias current is adopted in the first order current-voltage conversion of signal processing circuit 17; The analog-digital converter of analog to digital conversion circuit adopts the AD7942 of 14 bit resolutions, and perhaps can adopt resolution is 12 or 16 s' transducer.
The principle that concentration detects is as described below: situations such as the wavelength of material molecule absorption spectrum, intensity, polarization state, with the architectural feature of this material inherent relation is arranged, by the degree of absorption of detected gas, just can determine the composition and the concentration of gas to special wavelength light.GAS ABSORPTION satisfies Lambert-Beer's law:
I(v)＝I
0(v)·e
-α(v)LC
In the formula, v is the frequency of light wave, I
0(v) and I (v) be respectively input light intensity and output intensity before and after the GAS ABSORPTION, α (the v) absorptance of frequency v place gas, C is a gas concentration, L is that GAS ABSORPTION has light path.
If use the light of characteristic frequency, and the light intensity of hypothesis light emitted is stable, then α (v), I0 (v) all are constants, L also is a constant again, so, I (v) with tested gas concentration C for concerning one to one.Therefore, when detecting, (value v) just can (v) calculate the concentration C of tested gas according to the I that timing signal is formulated with the relation curve of C as long as detection obtains I.
Because the temperature characterisitic of light source and light source driving circuit element, the light intensity of light emitted is not stablized constant, can have influence on the accuracy of testing result.For this reason, design a reference path, obtain the light intensity I ' of light before entering the GAS ABSORPTION path
0(v), utilize I (v) and I '
0(ratio v) and the relation curve of C calculate the concentration C of tested gas.Utilize the method for above-mentioned double light path can eliminate the measurement error that light source fluctuation brings substantially.
Faradic size by the measuring light electric diode is reacted light intensity value, and faradic current carries out current-voltage conversion, amplification, filtering through signal processing circuit, and this process all adopts low noise operational amplifier to reduce error.Filtered voltage signal is sent into control unit through 14 high-precision adc conversionization digital signals.It is core that control unit adopts enhancing 51 single-chip microcomputers at grace intelligence Pu, calculates the concentration that obtains chlorine dioxide according to the solidified relation curve of timing signal.There is result of calculation in the storage of this machine in control unit, shows by charactron or liquid crystal display screen, transmits by the RS232 port, is converted to the standard industry analogue signal of 4-20mA by transmission circuit.Also functions such as extended keyboard response again, printing as a result.
The sterilization of gas disinfection by chlorine dioxide device divides following step:
(1) character, needs disinfectant object and the sterilization levels according to disinfection space is provided with parameters such as gas disinfection by chlorine dioxide concentration, space humidity, disinfecting time in man-machine interactive system;
(2) open decontaminating apparatus humidification pipeline, make disinfection space humidity reach setting value;
(3) open decontaminating apparatus gas chlorine dioxide generator, to disinfection space injecting gas chlorine dioxide, simultaneity factor monitoring disinfection space gas concentration, humidity and pressure change;
(4) after disinfection space gas chlorine dioxide concentration reached setting value, generator was out of service;
(5) disinfection space is after being exposed to setting-up time under the setting gas chlorine dioxide concentration, opening disinfection space air-conditioning or air exchange system (annotates: be air-conditioning or the air exchange system that is sterilized room self, common laboratory all has, non-decontaminating apparatus all) carry out aeration, open decontaminating apparatus nitrogen purging protection pipeline simultaneously, the gas chlorine dioxide concentration is lower than the harmful value of breathing in disinfection space;
(6) form the disinfecting process summary, store as required or print, whole disinfecting process finishes.
In gas disinfection by chlorine dioxide device of the present invention, above-mentioned steps is after finishing for (1) step, and subsequent step is controlled automatically by man-machine interactive system, need not human intervention, reaches the automatization of disinfecting process.
The gas chlorine dioxide generator that described invention relates to adopts the method for sodium chlorite granule and chlorine reaction, and concrete reaction equation is as follows:
2NaClO
2+Cl
2＝2ClO
2+2NaCl
Gas chlorine dioxide method for generation is a reactant with sodium chlorite granule and certain proportion chlorine/nitrogen mixture body, have only gas chlorine dioxide and solid sodium chloride in the product, thereby make through having only the mist of gas chlorine dioxide and nitrogen in the gas behind the reactor.For making sodium chlorite granule complete reaction, the spy adds a certain proportion of Fructus Citri Limoniae acids reacting movable agent, and reacting movable agent is not participated in reaction directly, and therefore reactionless by-product occurs.In theory, sodium chlorite is 100% to the conversion ratio of gas chlorine dioxide, compares with preceding method, and cost is lower.
In above-mentioned reaction, require the chlorine complete reaction, because residual chlorine can cause space to be sterilized to be subjected to influences such as corrosion, therefore select the mist of a certain proportion of chlorine/nitrogen as reacting gas, through experimental verification, the ratio that chlorine accounts for mist should be controlled at the 2%-10% scope.For guaranteeing the completeness of sodium chlorite granule reaction, the ratio of Fructus Citri Limoniae acids activator should be controlled in the 20%-30% scope.
Gas chlorine dioxide reaction device is designed to cylindrical shape, and its draw ratio is controlled at more than 7: 1, and three above-mentioned barrel type reactor series connection are used.Granularity＞the 0.3mm of sodium chlorite particulate matter is to guarantee having low air drag, the sodium chlorite granule prevented from caking under this granularity simultaneously after reactor is filled sodium chlorite.
Because chlorine is corrosive to multiple metal, chlorine itself also is the hazardous gas of severe toxicity, even concentration only is the danger that still had corrosion and revealed in 2% o'clock, so the decompressor of chlorine/nitrogen mixture body adopts the Hastelloy decompressor.Inject the flow of mist to reactor with the strict control of mass flowmenter.Among the present invention, chlorine/nitrogen mixture body pressure is reduced to 1.4kg/cm through the Hastelloy decompressor
2, the mass flowmenter span of control is 21pm-301pm.
The described sterilizing machine scavenging pipeline of gas disinfection by chlorine dioxide device of the present invention finishes purgings such as gas chlorine dioxide residual in the device of back, chlorine goes out in order to sterilize, and guarantees the safety of device when idle.After whole gas chlorine dioxide takes place and finishes using, can some chlorine/nitrogen mixture cognition be stranded in reactor front end pipeline inevitably, and three reactor is interior with the gassy chlorine dioxide, the valve of whole generating means, pipe fitting, joint, pipe fitting parts etc. are had potential corrosion threaten, also make troubles for the maintenance of generating means and maintenance.Therefore for consideration to above-mentioned factor, the present invention has designed the sterilizing machine scavenging pipeline especially, between chlorine/nitrogen mixture bromhidrosis bottle and Ha Shi decompressor, insert the nitrogen purging branch road, after the generator reaction finishes, close chlorine/nitrogen mixture bottle, open the nitrogen gas cylinder, in generator, inject high pure nitrogen, chlorine and gas chlorine dioxide are purged out decontaminating apparatus, thereby guaranteeing the safety of device.
When gas disinfection by chlorine dioxide device of the present invention was worked, at first character, needs disinfectant object and the sterilization levels according to disinfection space was provided with parameters such as gas disinfection by chlorine dioxide concentration, space humidity, disinfecting time in man-machine interactive system; ON cycle blower fan 19 and decontaminating apparatus humidifier 10 make disinfection space humidity reach setting value; Open gaseous mixture air inlet electromagnetic valve 20, three reactor 6,7,8 is started working, and to disinfection space injecting gas chlorine dioxide, simultaneity factor monitoring disinfection space gas concentration, humidity and pressure change; After disinfection space gas chlorine dioxide concentration reached setting value, gaseous mixture air inlet electromagnetic valve 20 cut out, and three reactor 6,7,8 is out of service; Disinfection space is sterilized to setting-up time, open the disinfection space air exchange system and carry out aeration, close chlorine/nitrogen mixture bottle simultaneously, open purge solenoid valve 3, nitrogen air inlet electromagnetic valve 4, gaseous mixture air inlet electromagnetic valve 20, decontaminating apparatus pipeline and reactor are carried out the nitrogen purging protection, and the gas chlorine dioxide concentration is lower than the harmful value of breathing in disinfection space; Formation disinfecting process summary is stored as required or is printed, and whole disinfecting process finishes.In whole disinfecting process, except that parameter input, start the machine and close chlorine/nitrogen mixture bottle needs manually, all the other actions are switched and are finished automatically by man-machine interactive platform.
Embodiment
For the use and the effect of gas disinfection by chlorine dioxide device of the present invention, the embodiment that the spy is listed below are described.
It is 50m to volume that present embodiment adopts gas disinfection by chlorine dioxide device of the present invention
3Three grades of breadboard rooms of similar bio-safety carry out disinfection, adopt bacillus subtilis black variety gemma and Staphylococcus albus as the sterilization indicator bacteria, experimentize according to disinfectant Evaluation of Disinfection method in " disinfection technology standard (2002 editions) ".
As shown in Figure 3, place inoculation indicator bacteria inoculation sheet in 1 to No. 10 position of clean room,, place fan in room A, B, four positions of C, D for making the gas chlorine dioxide at the space uniform distribution.During sterilization, room temperature maintains 20 ℃, by humidifier the relative humidity in room is increased to 70%, the closed room air conditioning system, injecting gas chlorine dioxide in the room, monitor gas concentration simultaneously, humidity, pressure and other parameters, treat that the gas chlorine dioxide concentration stops when reaching 2.8mg/l injecting, under this concentration, make the room expose 2 hours, in the disinfecting process parameter is continued to monitor, open air-conditioning exhaust system ventilation 10 times after 2 hours, the gas chlorine dioxide concentration reaches the human body safe concentration in the room, whole disinfecting process finishes, and takes off indicator bacteria inoculation sheet and cultivates counting, calculates the sterilization logarithm value.
In the experimentation situation of change of room gas chlorine dioxide concentration, humidity and pressure is carried out record, gas disinfection by chlorine dioxide process of the present invention can be divided into 4 stages: environment humidification stage, gas chlorine dioxide inject the stage, expose sterilisation stage and aeration phase.Environment humidification stage and gas chlorine dioxide injection stage are that whole sterile environment forms the stage, humidity, pressure and gas chlorine dioxide concentration all have bigger variation at this moment, yet keep constantly substantially exposing these three parameters of sterilisation stage, the stability of gas disinfection by chlorine dioxide device disinfecting process of the present invention is described.Behind 10 times exhaust ventilation, the gas chlorine dioxide concentration is reduced to the human body respiration safety range in the clean room, enters noresidue abnormal flavour behind the room.Finish from room humidification to exhaust ventilation, whole disinfecting process only continues 3.5 hours.
By obtaining present embodiment disinfectant final result shown in table 1 and 2 behind the cultivation counting to sterilization indicator bacteria sheet, 2.8mg/l gas chlorine dioxide concentration logarithm value of killing to bacillus subtilis black variety gemma under the condition of relative humidity 70% reach 4.26, reached high-grade disinfectant level, Staphylococcus albus is killed logarithm value reach 8.21, reached the level of sterilization.Present embodiment explanation gas disinfection by chlorine dioxide device of the present invention has very high efficient to space disinfection, and disinfection cycle is short simultaneously, high efficiency.
Among table 1 embodiment to the killing effect of bacillus subtilis black variety gemma
Among table 2 embodiment to the staphylococcic killing effect of white
Although for illustrative purposes, embodiments of the invention have been provided, but those skilled in the art all can not break away under the appended claims scope of the present invention, it is carried out multiple modification and additional, also can describe various spaces in addition, room and implement the gas disinfection by chlorine dioxides embodiment.
Claims (3)
1. a gas disinfection by chlorine dioxide device is characterized in that, comprises gas chlorine dioxide generating device, online concentration detection apparatus, man-machine interactive platform and auxiliary piping; Man-machine interactive platform is connected with auxiliary piping with gas chlorine dioxide generator, online concentration detection apparatus respectively; Described gas chlorine dioxide generating device comprises three reactor, Ha Shi decompressor, compression chlorine/nitrogen mixture bottle and mass flowmenter, compression chlorine/nitrogen mixture bottle is connected with the three reactor front end by the gaseous mixture air inlet pipeline that sets gradually Ha Shi decompressor, gaseous mixture air inlet electromagnetic valve and mass flowmenter, compression chlorine/nitrogen mixture bottle is connected with the gaseous mixture air inlet pipeline by the scavenging pipeline that purge solenoid valve is set, and the three reactor rear end is by chlorine dioxide air duct UNICOM disinfection space; The signal piping that sets gradually temperature sensor, online concentration detection apparatus and circulating fan respectively with disinfection space and chlorine dioxide air duct UNICOM; Online concentration detection apparatus is by light source, collimating lens, spectroscope, air chamber, detect condenser lens, with reference to condenser lens, reference detector, detect detector, light source driving circuit, signal processing circuit, analog to digital conversion circuit, control unit and miscellaneous function unit are formed, described light source, collimating lens, spectroscope, air chamber, the center of detecting condenser lens and detection detector is arranged in order at same horizontal plane, described spectroscope becomes 45 degree to install with incident parallel rays, the spectroscope below sets gradually with reference to condenser lens and reference detector, on the described air chamber, lower surface is provided with gas feed and gas outlet respectively; Light source driving circuit connects light source, and signal processing circuit connects reference detector respectively, detects detector and analog to digital conversion circuit, and control unit connects analog to digital conversion circuit, light source driving circuit and miscellaneous function unit respectively; Auxiliary piping comprises that decontaminating apparatus humidification pipeline, sterilizing machine purge protection pipeline and disinfection space pressure reduction monitoring pipeline; decontaminating apparatus humidification pipeline and disinfection space pressure reduction monitoring pipeline communicate with disinfection space respectively, and sterilizing machine purges the protection pipeline and communicates with the gaseous mixture air inlet pipeline.
2. according to claim 1 gas disinfection by chlorine dioxide device, it is characterized in that, described sterilizing machine scavenging pipeline is made up of nitrogen cylinder, nitrogen decompressor and nitrogen air inlet electromagnetic valve, and the compressed nitrogen gas cylinder is connected with the gaseous mixture air inlet pipeline by the nitrogen air inlet pipeline that sets gradually nitrogen decompressor and nitrogen air inlet electromagnetic valve; The humidification pipeline is made up of the humidification pipeline that sets gradually humidifier, humidification electromagnetic valve and storage tank, and the humidification pipeline connects humidifier and chlorine dioxide air duct respectively; Disinfection space pressure reduction monitoring pipe route sets gradually the detection pipeline of differential pressure pickup and high efficiency particle air filter and forms.
3. according to claim 1 gas disinfection by chlorine dioxide device, it is characterized in that, described man-machine interactive platform is made up of display, PLC module, thermal printer and SD memory device, and the PLC module connects display, thermal printer, SD memory device, gaseous mixture air inlet electromagnetic valve, purge solenoid valve, nitrogen air inlet electromagnetic valve, humidification electromagnetic valve, mass flowmenter, humidifier, temperature sensor, differential pressure pickup and circulating fan respectively.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104043142A (en) * | 2014-06-26 | 2014-09-17 | 中国人民解放军军事医学科学院卫生装备研究所 | Portable remote-controlled gas chlorine dioxide space disinfection device |
| CN105435282A (en) * | 2014-08-13 | 2016-03-30 | 赖亮 | Slow-release type continuous disinfection equipment |
| CN115356919A (en) * | 2022-10-19 | 2022-11-18 | 吉林省百皓科技有限公司 | Self-adaptive adjusting method for PID controller of chlorine dioxide sterilizer |
| CN117191706A (en) * | 2023-09-15 | 2023-12-08 | 小仙炖霸州食品有限公司 | Azometer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104043142A (en) * | 2014-06-26 | 2014-09-17 | 中国人民解放军军事医学科学院卫生装备研究所 | Portable remote-controlled gas chlorine dioxide space disinfection device |
| CN105435282A (en) * | 2014-08-13 | 2016-03-30 | 赖亮 | Slow-release type continuous disinfection equipment |
| CN115356919A (en) * | 2022-10-19 | 2022-11-18 | 吉林省百皓科技有限公司 | Self-adaptive adjusting method for PID controller of chlorine dioxide sterilizer |
| CN115356919B (en) * | 2022-10-19 | 2023-01-24 | 吉林省百皓科技有限公司 | Self-adaptive adjusting method for PID controller of chlorine dioxide sterilizer |
| CN117191706A (en) * | 2023-09-15 | 2023-12-08 | 小仙炖霸州食品有限公司 | Azometer |
| CN117191706B (en) * | 2023-09-15 | 2024-02-13 | 小仙炖霸州食品有限公司 | Azometer |
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| Publication number | Publication date |
|---|---|
| CN102178968B (en) | 2014-02-26 |
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