CN110686956A

CN110686956A - VOC of ambient airSSampling preprocessing device and integral sampler

Info

Publication number: CN110686956A
Application number: CN201911153037.7A
Authority: CN
Inventors: 谢馨; 邓猛; 俞黎明; 蔡浚丞
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-01-14

Abstract

Ambient air voc_sSampling preprocessing device and integral sample thief relate to the environmental protection equipment field, the device protection casing, the top of protection casing is equipped with the connection port that is used for being connected with the sample connection of integral sample thief, connection port below is equipped with and is located the inside adsorption column of protection casing, be equipped with ozone adsorption structure in the adsorption column. The ambient air voc provided by the present application_sSampling preprocessing device utilizes the connection port to fix behind the sample connection of integral sampler, and the influence of ambient air volatility organic matter sampling in-process steam can be avoided to the protection casing, reduces the influence of moisture to the testing result among the analytic process, satisfies the quality of the manual sampling process of ambient air volatility organic matter. Moreover, the adsorption column in the protective cover can adsorb ozone in the air, thereby avoidingOzone influences the detection result and improves the accuracy of the detection result.

Description

Ambient air vocsSampling preprocessing device and integral sampler

Technical Field

The application relates to the field of environmental protection equipment, in particular to an ambient air voc_sA sampling preprocessing device and an integral sampler.

Background

Volatile Organic Compounds (VOCs) are important precursors for forming ozone pollution, and according to the requirements of the No. 2017/2024 document of the national ministry of ecological environment, the monitoring of the volatile organic compounds in the ambient air is carried out in key areas of the country from 2018.

In the monitoring process of the volatile organic compounds in the ambient air, a constant flow integral sampler is needed for sample collection, when raining weather is met in the sampling process, once water vapor in the air enters a sampling tank in the sampling process, serious interference is brought to sampling analysis, and the accuracy of a monitoring result is directly influenced.

The existing integral sampler only has a filter, is mainly used for removing particles in air, does not have a rain sheltering device, cannot avoid the influence of water vapor, and can bring interference to a test result in the measurement of rainwater weather. In addition, the prior art does not perform adsorption treatment on ozone in the air, and the presence of ozone in the air can seriously affect the determination of the content of volatile organic compounds.

Disclosure of Invention

The technical problem that this application was solved is the influence of the unable steam of avoiding of integral sampler among the prior art, leads to the measuring result inaccurate.

To solve the above technical problem, an embodiment of the present application provides an ambient air voc_sSampling preprocessing device, including the protection casing, the top of protection casing is equipped with the connection port that is used for being connected with the sample connection of integral sampler, connection port below is equipped with the adsorption column that is located the protection casing inside, be equipped with ozone adsorption structure in the adsorption column.

In the above technical solution, further, the connection port is made of soft metal nickel.

In the above technical solution, further, a fluororubber gasket is disposed on the connection port.

In the above technical solution, further, a thread structure or a quick joint structure is provided on the connection port.

In the above technical solution, further, the protective cover is in the shape of an inverted bowl.

In the above technical scheme, further, the edge of the bottom of the protective cover is provided with a guiding gutter, the guiding gutter is located outside the protective cover, and the guiding gutter is provided with a plurality of water outlets.

In the above technical solution, further, the ozone adsorption structure is granular potassium iodide.

In addition, this application still provides an integral sampler, including integral sampler body and above-mentioned preprocessing device, preprocessing device's connection port is connected with the sample connection of integral sampler body.

Compared with the prior art, the technical scheme of the embodiment of the application has the following beneficial effects:

the embodiment of the application provides an ambient air voc_sSampling preprocessing device utilizes the connection port to fix behind the sample connection of integral sampler, and the influence of ambient air volatility organic matter sampling in-process steam can be avoided to the protection casing, reduces the influence of moisture to the testing result among the analytic process, satisfies the quality of the manual sampling process of ambient air volatility organic matter. Moreover, the adsorption column in the protective cover can adsorb ozone in the air, so that the influence of the ozone on the detection result is avoided, and the accuracy of the detection result is improved. In addition, the pretreatment device also has the advantages of simple structure, low cost, high reliability, small volume and convenient installation.

Drawings

FIG. 1 is an ambient air voc of a first embodiment of the present application_sA schematic representation of a sampling pre-processing apparatus;

FIG. 2 is an ambient air voc of the first embodiment of the present application_sA longitudinal section schematic diagram of a sampling pretreatment device;

FIG. 3 is an ambient air voc of a second embodiment of the present application_sThe longitudinal section of the sampling pretreatment device is schematic.

Reference numerals:

11-a protective cover; 12-a connection port; 13-an adsorption column; 14-diversion trench.

Detailed Description

As understood by those skilled in the art, as for the background art, the current integral sampler has no rain sheltering device, cannot avoid the influence of water vapor, and has extremely poor measurement accuracy in the rain weather; ozone in the air is not adsorbed, and the accuracy of measuring the content of organic matters is poor.

Therefore, the embodiment of the application provides an ambient air voc_sSampling preprocessing device, including the protection casing, the top of protection casing is equipped with the connection port that is used for being connected with the sample connection of integral sampler, connection port below is equipped with the adsorption column that is located the protection casing inside, be equipped with ozone adsorption structure in the adsorption column.

The embodiment of the application provides an ambient air voc_sSampling preprocessing device utilizes the connection port to fix behind the sample connection of integral sampler, and the influence of ambient air volatility organic matter sampling in-process steam can be avoided to the protection casing, reduces the influence of moisture to the testing result among the analytic process, satisfies the manual sampling quality requirement of in-process of ambient air volatility organic matter. In addition, the inside adsorption column of protection casing can adsorb the ozone in the air, avoids ozone influence testing result, improves testing result's accuracy.

Further, the connection port of the embodiment of the present application is made of a soft metal nickel material.

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present application and not all 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 application.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

FIG. 1 is an ambient air voc of a first embodiment of the present application_sA schematic representation of a sampling pre-processing apparatus; FIG. 2 is an ambient air voc of the first embodiment of the present application_sThe longitudinal section of the sampling pretreatment device is schematic.

As shown in fig. 1 and 2, the first embodiment of the present application provides an ambient air voc_sThe sampling pretreatment device comprises a protective cover 11. The protective cover 11 is in a reversed bowl shape, and the outer part of the protective cover 11 is in a smooth cambered surface, so that a good flow guiding effect is achieved on rainwater; the inner part is in a shape with a narrow top and a wide bottom, so that the continuous stability of the sampling airflow is ensured.

In some embodiments, the shield 11 is made of metal, avoiding the use of plastic, which may have voc_sAnd adsorption is easily generated.

The top of the protective cover 11 is provided with a connection port 12, and the connection port 12 is used for being connected with a sampling port of the integral sampler. In some embodiments, the connection port 12 is provided with an internal thread structure, and correspondingly, the sampling port of the integral sampler is provided with an external thread structure, so that the protective cover 11 is connected with the integral sampler through thread matching. Of course, this is only one embodiment of the present application, and the connection port 12 of the present application is not limited to a threaded connection, and a quick-coupling structure may be provided to connect with the integral sampler.

In some embodiments, the connection port 12 is made of soft metal nickel, and a fluororubber gasket is arranged on the connection port 12, so that the leakage risk is avoided after long-term use.

An adsorption column 13 positioned inside the protective cover 11 is arranged below the connecting port 12, and an ozone adsorption structure is arranged in the adsorption column 13. In some embodiments, the adsorption column 13 is detachably fixed below the connection port 12, and a new adsorption column 13 is replaced before each field test to ensure the adsorption effect.

In some embodiments, the ozone adsorbing structure is granular potassium iodide, and as ozone-containing air passes through the apparatus, the iodide ions are oxidized to iodine while depleting the ozone therein. The adsorption column 13 may be provided with a dehumidifying structure to remove moisture from the air.

As shown in FIG. 3, a second embodiment of the present application provides ambient air voc_sThe sampling pretreatment device is different from other first embodiments in that a diversion trench 14 is arranged at the bottom edge of the protective cover 11, the diversion trench 14 is positioned outside the protective cover 11, and a plurality of water outlet holes are formed in the diversion trench 14.

The diversion trench 14 protrudes outwards from the edge of the bottom of the protective cover 11, so that the waterproof effect is better: firstly, the bottom of the protective cover 11 is heavier, the stability in wind is easier to maintain, the shaking amplitude is smaller, and rainwater is not easy to enter the protective cover 11; secondly, when rocking, guiding gutter 14 can block some rainwater, and the rainwater is also not volatile to the inside of protection casing 11 yet.

A plurality of water outlet holes are uniformly distributed on the diversion trench 14, so that rainwater can be smoothly discharged.

In addition, the application also provides an integral sampler, which comprises an integral sampler body and a preprocessing device shown in fig. 1 or fig. 3, wherein a connecting port of the preprocessing device is connected with a sampling port of the integral sampler body.

Although the present application is disclosed above, the present application is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present disclosure, and it is intended that the scope of the present disclosure be defined by the appended claims.

Claims

1. Ambient air voc_sSampling preprocessing device, its characterized in that includes the protection casing, the top of protection casing is equipped with the connection port that is used for being connected with the sample connection of integral sampler, connection port below is equipped with the adsorption column that is located the protection casing inside, be equipped with ozone adsorption structure in the adsorption column.

2. The ambient air voc of claim 1_sThe sampling pretreatment device is characterized in that the connecting port is made of soft metal nickel.

3. Ambient air voc according to claim 1 or 2_sThe sampling pretreatment device is characterized in that a fluororubber gasket is arranged on the connecting port.

4. The ambient air voc of claim 1_sThe sampling pretreatment device is characterized in that a threaded structure or a quick joint structure is arranged on the connecting port.

5. The ambient air voc of claim 1_sThe sampling pretreatment device is characterized in that the protective cover is in an inverted bowl shape.

6. The ambient air voc of claim 5_sSampling preprocessing device, its characterized in that, protection casing bottom edge is equipped with the guiding gutter, the guiding gutter is located the outside of protection casing, is equipped with a plurality of apopores on the guiding gutter.

7. The ambient air voc of claim 1_sThe sampling pretreatment device is characterized in that the ozone adsorption structure is filled with granular potassium iodide.

8. An integrating sampler comprising an integrating sampler body and a preprocessing unit according to any one of claims 1 to 7, the connection port of the preprocessing unit being connected to the sampling port of the integrating sampler body.