CN111268759A - Medical waste gas and waste water cooperative purification device - Google Patents
Medical waste gas and waste water cooperative purification device Download PDFInfo
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- CN111268759A CN111268759A CN202010146076.0A CN202010146076A CN111268759A CN 111268759 A CN111268759 A CN 111268759A CN 202010146076 A CN202010146076 A CN 202010146076A CN 111268759 A CN111268759 A CN 111268759A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/32—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/4314—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor with helical baffles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/818—Employing electrical discharges or the generation of a plasma
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- Oil, Petroleum & Natural Gas (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- Physical Or Chemical Processes And Apparatus (AREA)
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Abstract
The invention relates to the technical field of environmental protection, in particular to a medical waste gas and waste water cooperative purification device, which comprises: the gas-liquid input module is used for mixing the received medical waste gas and the waste water; the plasma generating module is used for generating plasma; the mixing treatment module is used for fully contacting the plasma with the mixed waste gas and waste water to generate purified gas; the gas-liquid output module is used for carrying out gas-liquid separation on the purified gas and then discharging the gas; the input end of the mixing processing module is respectively connected with the output ends of the gas-liquid input module and the plasma generating module; and the output end of the mixing processing module is connected with the input end of the gas-liquid output module. The invention can not generate harmful substances by reaction in the treatment process.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a medical waste gas and waste water cooperative purification device.
Background
Hospital sewage contains a large amount of pathogenic bacteria, viruses and chemical agents and has the characteristics of space pollution, acute infection and latent infection. The medical waste gas is harmful gas generated by burning medical waste and the like, and the industrial waste gas containing alcohol, acid, ketone compounds and the like not only pollutes the environment, but also seriously threatens the physical and psychological health of human beings. And the medical organic waste gas has the characteristics of large quantity, wide range and difficult degradation, so the treatment work is particularly complicated.
At present, chlorine-containing disinfectants such as sodium hypochlorite, chlorine dioxide and the like are mainly used for disinfecting medical wastewater in large hospitals, wherein the sodium hypochlorite is remained in the using process, is easy to react with organic matters in water in the sterilizing process to generate chemical substances with carcinogenic and teratogenic effects, has certain dangerousness and needs to be managed by special persons. The traditional method has the inevitable defects in principle, such as high cost of construction, maintenance, management and the like of facilities, multi-stage treatment required for treatment, relatively complex process control and the like.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a cooperative purification device for medical waste gas and wastewater, which does not react to generate harmful substances during the treatment process, in order to overcome the above-mentioned drawbacks of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a medical waste gas and waste water cooperative purification device is constructed, and comprises:
the gas-liquid input module is used for mixing the received medical waste gas and the waste water;
the plasma generating module is used for generating plasma;
the mixing treatment module is used for fully contacting the plasma with the mixed waste gas and waste water to generate purified gas;
the gas-liquid output module is used for carrying out gas-liquid separation on the purified gas and then discharging the gas;
the input end of the mixing processing module is respectively connected with the output ends of the gas-liquid input module and the plasma generating module;
and the output end of the mixing processing module is connected with the input end of the gas-liquid output module.
Further, the gas-liquid input module comprises: an atomizing nozzle and a mixing pipeline;
the input end of the gas-liquid input module comprises: an exhaust gas inlet and a waste liquid inlet;
the input end of the mixing pipeline is a waste gas inlet, and the input end of the atomizing nozzle is a waste liquid inlet;
the nozzle of the atomizing nozzle is communicated between the input end and the output end of the mixing pipeline;
the output end of the mixing pipeline is the output end of the liquid input module.
Further, the gas-liquid input module further comprises: a first turbocharger and a water pump;
the first turbocharger is arranged at the input end of the mixing pipeline and used for pressing medical waste gas into the mixing pipeline;
the water pump is arranged at the input end of the atomizer and used for conveying the medical wastewater into the atomizer and combining with the nozzle to form the medical wastewater into mist in the mixing pipeline to be mixed with the medical waste gas.
In the above technical solution, the mixing processing module includes a plurality of static mixers arranged in parallel;
each static mixer is of a tubular structure;
the output ends of the gas-liquid input modules are multiple, and the output ends of the ion generation modules are multiple;
the output end of each gas-liquid input module and the output end of each ion generation module are correspondingly communicated with the input end of a static mixer;
the output end of each static mixer is communicated with the input end of the gas-liquid output module after being converged.
Further, each static mixer is internally provided with a spiral mixing blade;
the mixing blades are arranged along the length direction of the corresponding static mixer.
In the above technical solution, the plasma generation module includes:
the DBD low-temperature plasma generating device is used for generating plasma;
a second turbocharger for pressing air into the DBD low-temperature plasma generating device so that the plasma flows into the hybrid processing module;
the inlet of the second turbocharger is the input end of the plasma generation module and is communicated with the atmosphere;
and the outlet of the second turbocharger is connected with the inlet of the DBD low-temperature plasma generating device, and the outlet of the DBD low-temperature plasma generating device is the output end of the plasma generating module.
Further, the DBD low-temperature plasma generating apparatus includes: the positive plate, the silver-plated graphite electrode, the ceramic baffle and the shell;
the positive plate and the silver-plated graphite electrode are respectively arranged at two ends in the shell;
the ceramic baffle is arranged on the silver-plated graphite electrode and is positioned between the positive plate and the silver-plated graphite electrode;
air fed by the second turbocharger flows between the positive plate and the ceramic baffle, thereby entraining the plasma.
Further, the plasma generation module further includes:
the drying agent is used for drying the air entering the DBD low-temperature plasma generating device;
the desiccant is disposed at an inlet of the second turbocharger.
In the above technical solution, the gas-liquid output module includes:
the condensation elbow is used for condensing liquid in the purified gas and discharging the condensed gas;
a liquid storage tank for collecting and discharging condensed liquid;
the output end of the mixing processing module is respectively connected with the inlet of the condensation elbow and the inlet of the liquid storage tank;
the output end of the gas-liquid output module is divided into a condensation elbow outlet and an outlet of the liquid storage tank;
and condensed liquid in the condensation elbow flows into the inlet of the liquid storage tank through the inlet of the condensation elbow.
Further, a sensor is arranged in the liquid storage tank;
the sensor is used for monitoring liquid in the liquid storage tank in real time.
In the invention, the plasma generated by the plasma generation module is used for mixing the medical waste gas and the waste water, so that harmful chemical substances are not generated, the purification process is safe and the purification effect is obvious. In addition, the invention can simultaneously treat the medical waste gas and the waste water, so that the passing efficiency is high. Therefore, the invention has the advantages of simple operation, wide practicability, low energy consumption and obvious purification effect.
Drawings
In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts, wherein:
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic perspective view of an embodiment of the present invention;
FIG. 3 is a schematic diagram of a static mixer according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a mixing blade in an embodiment of the present invention;
fig. 5 is an enlarged schematic view at M in fig. 2.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the cooperative purification apparatus for medical waste gas and waste water according to the present invention comprises:
the gas-liquid input module 11 is used for mixing the received medical waste gas and the waste water;
a plasma generation module 12 for generating plasma;
the mixing treatment module 13 is used for fully contacting the plasma with the mixed waste gas and waste water to generate purified gas;
a gas-liquid output module 14 for performing gas-liquid separation on the purified gas and then discharging the gas;
the input end of the mixing processing module 13 is respectively connected with the output ends of the gas-liquid input module 11 and the plasma generating module 12;
the output end of the mixing processing module 13 is connected with the input end of the gas-liquid output module 14.
In this embodiment, the plasma generated by the plasma generation module 12 is used to mix the medical waste gas and the waste water, so that no harmful chemical substances are generated, the purification process is safe, and the purification effect is obvious. In addition, the invention can simultaneously treat the medical waste gas and the waste water, so that the passing efficiency is high. Therefore, the invention has the advantages of simple operation, wide practicability, low energy consumption and obvious purification effect.
As shown in fig. 2, the gas-liquid input module 11 includes: an atomizer 2 and a mixing duct 15;
the input end of the gas-liquid input module 11 comprises: an exhaust gas inlet and a waste liquid inlet;
the input end of the mixing pipeline 15 is a waste gas inlet, and the input end of the atomizing nozzle 2 is a waste liquid inlet;
the nozzle of the atomizing nozzle 2 is communicated between the input end and the output end of the mixing pipeline 15;
the output end of the mixing pipeline 15 is the output end of the liquid input module 11.
The gas-liquid input module 11 further includes: a first turbocharger 1 and a water pump 6;
the first turbocharger 1 is arranged at the input end of the mixing pipeline 15 and is used for pressing medical waste gas into the mixing pipeline 15;
the water pump 6 is arranged at the input end of the atomizer 2 and used for delivering the medical wastewater into the atomizer 2 and combining with the nozzle to form the medical wastewater into mist in the mixing pipeline 15 to be mixed with the medical waste gas.
In the embodiment, medical exhaust gas is input by the rotation of the first turbocharger 1; medical waste water is pumped into the waste liquid pump through the water pump 6, and then the waste liquid is changed into mist through the nozzle of the atomizing nozzle 2 and is mixed with waste gas in the mixing pipeline 15.
As shown in fig. 2 and 3, the mixing processing module 13 includes a plurality of static mixers 7 arranged in parallel;
each static mixer 7 is of tubular construction;
a plurality of output ends of the gas-liquid input module 11 are provided, and a plurality of output ends of the ion generation module 12 are provided;
the output end of each gas-liquid input module 11 and the output end of each ion generation module 12 are correspondingly communicated with the input end of a static mixer 7;
the output end of each static mixer 7 is communicated with the input end of the gas-liquid output module 14 after being converged.
As shown in fig. 4, each static mixer 7 is provided with helical mixing blades 7.1;
the mixing blades 7.1 are arranged in the longitudinal direction of the corresponding static mixer 7.
In this embodiment, each static mixer inlet is connected by two input pipes, respectively inputting air containing plasma and mixed steam of waste gas and atomized waste liquid. A plurality of mixing units formed by mixing blades 7.1 in the static mixer 7 are mutually crossed and shunted, so that a good mixing effect can be achieved instantly, and air containing plasma and mixed steam are fully reacted.
As shown in fig. 2, the plasma generation module 12 includes:
a DBD (dielectric barrier discharge) low-temperature plasma generating device 3 for generating plasma;
a second turbocharger 4 for pressurizing air into the DBD low-temperature plasma generating device 3 so that the plasma flows into the hybrid processing module 13;
the inlet of the second turbocharger 4 is the input end of the plasma generation module 12 and is communicated with the atmosphere;
an outlet of the second turbocharger 4 is connected with an inlet of the DBD low-temperature plasma generating device 3, and an outlet of the DBD low-temperature plasma generating device 3 is an output end of the plasma generating module 12.
As shown in fig. 5, the DBD low-temperature plasma generating apparatus 3 includes: a positive plate 3.1, a silver-plated graphite electrode 3.2, a ceramic baffle 3.3 and a shell 3.4;
the positive plate 3.1 and the silver-plated graphite electrode 3.2 are respectively arranged at two ends in the shell 3.4;
the ceramic baffle 3.3 is arranged on the silver-plated graphite electrode 3.2 and is positioned between the positive plate 3.1 and the silver-plated graphite electrode 3.2;
the air fed by the second turbocharger 4 flows between the positive plates 3.1 and the ceramic baffles 3.3, thus entraining the plasma.
The plasma generation module 12 further includes:
a drying agent 5 for drying the air introduced into the DBD low-temperature plasma generating device 3;
the desiccant 5 is provided at the inlet of the second turbocharger 4.
In the present embodiment, air is input through the second turbocharger 4, moisture is removed from the air through the desiccant 5, and the DBD low-temperature plasma generating device generates plasma, and the input air transfers the plasma in the generating device and supplements the new air to generate new plasma.
As shown in fig. 2, the gas-liquid output module 14 includes:
a condensation elbow 8 for condensing the liquid in the purified gas and discharging the condensed gas;
a liquid storage tank 9 for collecting and discharging condensed liquid;
the output end of the mixing processing module 13 is respectively connected with the inlets of the condensation elbow 8 and the liquid storage tank 9;
the output end of the gas-liquid output module 14 is divided into an outlet of the condensation elbow 8 and an outlet of the liquid storage tank 9;
the condensed liquid in the condenser elbow 8 flows into the inlet of the reservoir 9 through the inlet of the condenser elbow 8.
In the present embodiment, the reservoir 9 is disposed below the condensation elbow 8. The condensation elbow 8 is vertically arranged and is in a bent shape. The curved condensation elbow 8 increases the contact area between the purified gas (mixed gas) and the pipe wall, and prolongs the contact time. The vertically arranged condensation elbow 8 enables the liquid condensed in the pipe to smoothly flow down to the liquid storage tank 9.
As shown in fig. 1, a sensor 10 is arranged in the liquid storage tank 9;
the sensor 10 is used for monitoring the liquid in the liquid storage tank 9 in real time.
In this embodiment, the treated mixed vapor passes through the condensation elbow 8, the atomized droplets are condensed and flow into the liquid storage tank 9, and the treated gas continues to pass through the condensation elbow 8 and is finally discharged from the gas outlet. The waste liquid in the liquid reserve tank 9 is discharged through the liquid outlet on the liquid reserve tank 9 after reaching a certain amount, installs sensor 10 at the liquid reserve tank 9 wall, can ensure that the liquid after the processing satisfies the emission requirement to the pollution composition real time monitoring in the waste liquid.
In this embodiment, the gas outlet is the outlet of the condenser elbow 8; the liquid outlet is the outlet of the reservoir 9.
The working process of the invention is as follows:
the waste gas generated after the medical appliance is incinerated can pass through the activated carbon to remove solid particles in the waste gas before entering the device, and the medical waste liquid is also subjected to rough filtration to remove solid residues in the waste liquid before entering the device, so that the liquid entering the device is ensured to only contain a liquid phase.
The medical waste liquid is pumped into the device by a water pump 6 and then sprayed out by a plurality of spray heads to form mist. Exhaust gas is drawn into the device by the first turbocharger 1 and mixes with the mist of waste liquid at the spray head.
And on the other side of the device, a DBD plasma generating device generates plasma, air is dried and then is pumped into the device through a second turbocharger 4, the air and the plasma are mixed to form a plasma mixed gas, and then the plasma mixed gas and the waste liquid are mixed to fully react in a static mixer 7.
Finally, gas and liquid are separated in the condensation elbow 8, and the treated waste liquid and the treated waste gas which reach the standard are discharged from a liquid outlet and a gas outlet respectively.
In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, invention lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. To those skilled in the art; various modifications to these embodiments will be readily apparent, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a medical treatment waste gas waste water purifier in coordination which characterized in that includes:
the gas-liquid input module (11) is used for mixing the received medical waste gas and the waste water;
a plasma generation module (12) for generating a plasma;
the mixing treatment module (13) is used for fully contacting the plasma with the mixed waste gas and waste water to generate purified gas;
a gas-liquid output module (14) for discharging the purified gas after gas-liquid separation;
the input end of the mixing processing module (13) is respectively connected with the output ends of the gas-liquid input module (11) and the plasma generating module (12);
the output end of the mixing processing module (13) is connected with the input end of the gas-liquid output module (14).
2. The cooperative medical waste water and waste gas purifying apparatus as claimed in claim 1, wherein the gas-liquid input module (11) comprises: an atomizing nozzle (2) and a mixing pipeline (15);
the input end of the gas-liquid input module (11) comprises: an exhaust gas inlet and a waste liquid inlet;
the input end of the mixing pipeline (15) is a waste gas inlet, and the input end of the atomizing nozzle (2) is a waste liquid inlet;
the nozzle of the atomizing nozzle (2) is communicated between the input end and the output end of the mixing pipeline (15);
the output end of the mixing pipeline (15) is the output end of the liquid input module (11).
3. The cooperative medical waste water and waste gas purifying apparatus as claimed in claim 2, wherein the gas-liquid input module (11) further comprises: a first turbocharger (1) and a water pump (6);
the first turbocharger (1) is arranged at the input end of the mixing pipeline (15) and is used for pressing medical waste gas into the mixing pipeline (15);
the water pump (6) is arranged at the input end of the atomizing nozzle (2) and used for conveying the medical wastewater into the atomizing nozzle (2) and combining with the nozzle to form the medical wastewater into mist in the mixing pipeline (15) to be mixed with the medical waste gas.
4. The cooperative medical waste water purification device as claimed in claim 1, wherein the mixing treatment module (13) comprises a plurality of static mixers (7) arranged in parallel;
each static mixer (7) is of a tubular structure;
the output ends of the gas-liquid input modules (11) are multiple, and the output ends of the ion generation modules (12) are multiple;
the output end of each gas-liquid input module (11) and the output end of each ion generation module (12) are correspondingly communicated with the input end of a static mixer (7);
the output end of each static mixer (7) is communicated with the input end of the gas-liquid output module (14) after being converged.
5. The cooperative medical waste water and exhaust purification device according to claim 4, wherein each static mixer (7) is provided with a spiral mixing blade (7.1);
the mixing blades (7.1) are arranged in the length direction of the corresponding static mixer (7).
6. The cooperative medical waste water purification device as claimed in claim 1, wherein the plasma generation module (12) comprises:
a DBD low-temperature plasma generating device (3) for generating plasma;
a second turbocharger (4) for pressing air into the DBD low-temperature plasma generating device (3) so that the plasma flows into the mixing processing module (13);
the inlet of the second turbocharger (4) is the input end of the plasma generation module (12) and is communicated with the atmosphere;
the outlet of the second turbocharger (4) is connected with the inlet of the DBD low-temperature plasma generating device (3), and the outlet of the DBD low-temperature plasma generating device (3) is the output end of the plasma generating module (12).
7. The cooperative medical waste water purification apparatus as claimed in claim 6, wherein the DBD low temperature plasma generating device (3) comprises: a positive plate (3.1), a silver-plated graphite electrode (3.2), a ceramic baffle (3.3) and a shell (3.4);
the positive plate (3.1) and the silver-plated graphite electrode (3.2) are respectively arranged at two ends in the shell (3.4);
the ceramic baffle (3.3) is arranged on the silver-plated graphite electrode (3.2) and is positioned between the positive plate (3.1) and the silver-plated graphite electrode (3.2);
the air fed by the second turbocharger (4) flows between the positive plate (3.1) and the ceramic baffle (3.3) and entrains the plasma.
8. The cooperative medical waste water purification device as claimed in claim 6, wherein the plasma generation module (12) further comprises:
a drying agent (5) for drying the air entering the DBD low-temperature plasma generating device (3);
the desiccant (5) is arranged at the inlet of the second turbocharger (4).
9. The cooperative medical waste gas and water purification device as claimed in claim 1, wherein the gas-liquid output module (14) comprises:
a condensation elbow (8) for condensing the liquid in the purified gas and discharging the condensed gas;
a liquid storage tank (9) for collecting and discharging condensed liquid;
the output end of the mixing processing module (13) is respectively connected with the inlets of the condensation elbow (8) and the liquid storage tank (9);
the output end of the gas-liquid output module (14) is divided into an outlet of the condensation elbow (8) and an outlet of the liquid storage tank (9);
condensed liquid in the condensation elbow (8) flows into an inlet of the liquid storage tank (9) through an inlet of the condensation elbow (8).
10. The cooperative medical waste gas and water purification device as claimed in claim 9, wherein a sensor (10) is arranged in the liquid storage tank (9);
the sensor (10) is used for monitoring the liquid in the liquid storage tank (9) in real time.
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| CN202010146076.0A CN111268759A (en) | 2020-03-05 | 2020-03-05 | Medical waste gas and waste water cooperative purification device |
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| CN114230063A (en) * | 2021-12-18 | 2022-03-25 | 武汉理工大学 | Waste gas and waste liquid synergistic purification system |
| CN115138193A (en) * | 2022-07-18 | 2022-10-04 | 宁夏艾克坚机械设备有限公司 | Device and method for removing odor and VOCs (volatile organic compounds) by using gaseous chlorine dioxide |
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Application publication date: 20200612 |