CN110646253A - Comprehensive sampler for atmospheric particulate matters and VOCs - Google Patents

Abstract

A comprehensive sampler for atmospheric particulate matter and VOCs, comprising a particulate matter sampling head and a VOCs collection container located outside a box body, and a diaphragm pump located inside the box body; the particulate matter sampling head and the diaphragm pump are connected through a first pipeline, and the first pipeline and the VOCs The collection container is connected through the second pipeline; the two pipelines are provided with flow meters; the top of the box is respectively provided with a three-factor sensor and a wind speed sensor; the second pipeline and the VOCs collection container are provided with a restrictor valve; the VOCs collection container passes through the foldable table There are display screens, control panels and power switches on the side panels of the box on the opposite side of the foldable table, and the other two side panels are provided with air vents; there is a control mechanism inside the box, all Both the sensor and the flow meter are connected to the control mechanism, and the data of temperature, humidity, air pressure and wind speed are stored and analyzed by the intelligent terminal of the control mechanism; the bottom of the box is provided with a tripod bracket, and the top of the box is provided with a handle.

Description

A comprehensive sampler for atmospheric particulate matter and VOCs

technical field

The invention belongs to the technical field of atmospheric sampling, and in particular relates to a comprehensive sampler for atmospheric particulate matter and VOCs.

Background technique

With the continuous expansion of urbanization, the problem of air pollution has become more and more prominent in recent years, which not only threatens people's health and life, but also causes huge economic losses. Using scientific source analysis methods to determine the source of air pollutants is a The key to atmospheric environmental control and governance.

At present, air pollutants are mainly composed of particulate matter, VOCs (volatile organic compounds), SO ₂ , NO _x , O ₃ , etc. The source analysis of particulate matter and VOCs is not yet perfect. To obtain reliable source analysis results, it is necessary to Accurate data of particulate matter, VOCs and other components in air pollutants.

Source apportionment technology is more and more widely used in the field of atmospheric environment. As source apportionment technology and methods become more and more perfect, the input files required by source apportionment models are gradually simplified. Among them, source apportionment models such as PMF and UNMIX only need to input accurate concentration information and uncertainty information, then reliable source analysis results can be obtained. In addition, changes in meteorological factors around the sampling point are gradually added to the model analysis to analyze the migration and transformation of pollutants, the causes of haze and so on.

However, for the collection of particulate matter and VOCs in ambient air, different collectors are often used for sample collection in current research, and individual comprehensive samplers can only obtain particulate matter and some pollutants in the air by solution absorption method. Unable to meet the demand for VOCs source analysis.

Furthermore, if different collectors are used to collect particulate matter samples and VOCs samples, the consistency of the samples in time and space will inevitably be artificially split, and the workload of sample collection will also be increased. One of the characteristics is strong fluidity, and atmospheric pollutants have certain differences in different time and space, and ignoring this difference will inevitably lead to inconsistency of pollutant components, thereby increasing the error of source analysis.

SUMMARY OF THE INVENTION

In view of the problems existing in the prior art, the present invention provides a comprehensive sampler for atmospheric particulate matter and VOCs, which can synchronously complete the collection of particulate matter and VOCs in the air, and can simultaneously complete the temperature, humidity, air pressure and temperature around the sampling point during the sampling process. The collection of meteorological elements such as wind speed makes the analysis results of source analysis more accurate.

In order to achieve the above purpose, the present invention adopts the following technical scheme: a comprehensive sampler for atmospheric particulate matter and VOCs, comprising a sampler box, a particulate matter sampling head, a VOCs collection container, a diaphragm pump, a first pipeline and a second pipeline; the diaphragm The pump is arranged inside the sampler box, the particle sampling head is arranged on the outer top of the sampler box, the particle sampling head is located directly above the diaphragm pump, and the VOCs collection containers are all located on the outside of the sampler box; A pipeline is arranged vertically, the bottom end of the first pipeline is connected with the diaphragm pump, and the upper end of the first pipeline is connected with the particle sampling head through the top plate of the sampler box; the second pipeline is arranged horizontally, and one end of the second pipeline is connected with the first pipeline The other end of the second pipeline is connected to the VOCs collection container through the side plate of the sampler box.

A restrictor valve is installed between the second pipeline and the VOCs collection container, a first flow meter is installed on the pipe body of the first pipeline, and a second flow meter is installed on the pipe body of the second pipeline.

A foldable platen is installed on the outer side of the sampler box, the foldable platen is hinged on the sampler box, and the angle adjustment range of the foldable platen is 0-90°. When the platen is in a horizontal state, the upper surface of the foldable platen is used to place the VOCs collection container.

A three-factor sensor and a wind speed sensor are installed on the top of the sampler box, the temperature, humidity and air pressure are collected by the three-factor sensor, and the wind speed is collected by the wind speed sensor.

A handle is arranged on the top of the sampler box, and the surface of the handle is anti-skid. A tripod bracket is installed at the bottom of the sampler box. The angle adjustment range of the legs of the tripod bracket is 0-30°, and the height of the legs of the tripod bracket The adjustment range is 1m to 1.5m, and a non-slip pad is installed at the bottom of the legs of the tripod.

The sampler box adopts a cuboid structure, the foldable platen is hinged on one of the side plates, and the side plates on the opposite side of the foldable platen are respectively installed with a display screen, a control panel and a power switch. The other two side plates of the box body are provided with a plurality of long strip-shaped exhaust holes, and an arc-shaped rain-proof baffle is arranged on the upper edge of each long strip-shaped exhaust hole.

A control mechanism is installed inside the sampler box, and the control mechanism includes an intelligent terminal, a data collector, a data interface converter and a power supply; the three-factor sensor, the wind speed sensor, the first flowmeter and the second flowmeter The data output ends are all connected with the data interface converter through the data line, and the data interface converter is respectively connected with the intelligent terminal and the data collector, and the temperature, humidity, air pressure and wind speed data are all stored and analyzed by the intelligent terminal; the diaphragm pump, The display screen and the control panel are connected with the intelligent terminal.

The particle sampling head includes a protective cover, a nozzle body, a collecting plate and a filter membrane clip. The nozzle body and the collecting plate are replaceable structures. By replacing the nozzle body and the collecting plate, particles of different particle sizes are collected. on the carrier filter.

The VOCs collection container adopts an inner wall inertization treatment container, and the inner wall inertization treatment container is divided into a suma tank and a gas collection bag; when a suma tank is used, the suma tank and the restrictor valve are sealed through a threaded pipe joint. , and the threaded connection is wrapped with airtight tape; when the air collecting bag is used, the pagoda head is connected between the air collecting bag and the restrictor valve, and the pagoda head and the air inlet of the air collecting bag are sealed and connected by a rubber tube .

Beneficial effects of the present invention:

The atmospheric particulate matter and VOCs comprehensive sampler of the present invention can synchronously complete the collection of airborne particulate matter and VOCs, and can simultaneously complete the collection of meteorological elements such as temperature, humidity, air pressure and wind speed around the sampling point during the sampling process, so that the source analysis can be achieved. The analysis results are more accurate.

The invention has good portability, effectively simplifies the sampling process, and effectively strengthens the consistency of sampling samples in time and space, thereby reducing errors caused by differences in time and space during sample collection.

The present invention removes the particulate matter in the air through the coordination of particle size separation of the sampling head, membrane filtration and restrictor valve filtration, effectively ensuring that the concentration of particulate matter in the gas collected in the VOCs collection container is at an extremely low level.

Description of drawings

1 is a schematic structural diagram of an atmospheric particulate matter and VOCs integrated sampler (VOCs collection container not shown) of the present invention;

2 is a structural cross-sectional view of an atmospheric particulate matter and VOCs integrated sampler (VOCs collection container and tripod bracket are not shown) of the present invention;

In the figure, 1-sampler box, 2-particulate sampling head, 3-diaphragm pump, 4-first pipeline, 5-second pipeline, 6-restrictor valve, 7-first flowmeter, 8-second Flowmeter, 9—foldable platen, 10—three-factor sensor, 11—wind speed sensor, 12—handle, 13—tripod stand, 14—display screen, 15—control panel, 16—power switch, 17—length Strip exhaust hole, 18-control mechanism.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in Figures 1 and 2, an atmospheric particulate matter and VOCs comprehensive sampler includes a sampler box 1, a particulate matter sampling head 2, a VOCs collection container, a diaphragm pump 3, a first pipeline 4 and a second pipeline 5; the The diaphragm pump 3 is arranged inside the sampler box 1, the particle sampling head 2 is arranged on the outer top of the sampler box 1, the particle sampling head 2 is located directly above the diaphragm pump 3, and the VOCs collection containers are all located in the sampler box. 1 external side; the first pipeline 4 is arranged vertically, the bottom end of the first pipeline 4 is connected with the diaphragm pump 3, and the upper end of the first pipeline 4 is connected with the particle sampling head 2 through the top plate of the sampler box 1; the The second pipe 5 is arranged horizontally, one end of the second pipe 5 is connected with the first pipe 4 , and the other end of the second pipe 5 is connected to the VOCs collection container through the side plate of the sampler box 1 .

A restrictor valve 6 is installed between the second pipe 5 and the VOCs collection container, a first flow meter 7 is installed on the pipe body of the first pipe 4 , and a second flow rate is installed on the pipe body of the second pipe 5 Count 8.

A foldable platen 9 is installed on the outer side of the sampler box 1, the foldable platen 9 is hinged on the sampler box 1, and the angle adjustment range of the foldable platen 9 is 0-90° , when the foldable platen 9 is in a horizontal state, the upper surface of the foldable platen 9 is used to place the VOCs collection container.

A three-factor sensor 10 and a wind speed sensor 11 are installed on the top of the sampler box 1 . The three-factor sensor 10 collects data on temperature, humidity and air pressure, and the wind speed sensor 11 collects data on the wind speed.

A handle 12 is arranged on the top of the sampler box 1, and the surface of the handle 12 is anti-slip. A tripod bracket 13 is equipped at the bottom of the sampler box 1, and the angle adjustment range of the legs of the tripod bracket 13 is 0-30° The height adjustment range of the legs of the tripod bracket 13 is 1m-1.5m, and a non-slip pad is installed at the bottom of the legs of the tripod bracket 13 .

The sampler box 1 adopts a rectangular parallelepiped structure, and the foldable platen 9 is hinged on one of the side plates. The power switch 16 is provided with a plurality of long strip-shaped exhaust holes 17 on the other two side plates of the sampler box 1 , and an arc-shaped rain-proof baffle is arranged on the upper edge of each long strip-shaped exhaust hole 17 .

A control mechanism 18 is installed inside the sampler box 1, and the control mechanism 18 includes an intelligent terminal, a data collector, a data interface converter and a power supply; the three-factor sensor 10, the wind speed sensor 11, the first flow meter 7 And the data output end of the second flowmeter 8 is connected with the data interface converter through the data line, the data interface converter is respectively connected with the intelligent terminal and the data collector, and the temperature, humidity, air pressure and wind speed data are all stored and stored by the intelligent terminal. Analysis; the diaphragm pump 3, the display screen 14 and the control panel 15 are connected to the intelligent terminal.

The particle sampling head 2 includes a protective cover, a nozzle body, a collecting plate and a filter membrane clip. The nozzle body and the collecting plate are replaceable structures. By replacing the nozzle body and the collecting plate, particles of different sizes are collected. Used to carry filter membranes.

The VOCs collection container adopts an inner wall inertization treatment container, and the inner wall inertization treatment container is divided into a suma tank and a gas collection bag; when a suma tank is used, the suma tank and the restrictor valve 6 are sealed through a threaded pipe joint Connection, the threaded connection is wrapped with airtight tape; when the air collection bag is used, the pagoda head between the air collection bag and the restrictor valve 6 is connected, and the connection between the pagoda head and the air inlet of the air collection bag is carried out by a rubber tube Sealed connection.

Describe one use process of the present invention below in conjunction with accompanying drawing:

In this embodiment, the sampler box 1, the first pipe 4 and the second pipe 5 are all made of stainless steel, the size of the sampler box 1 is 0.3m×0.15m×0.25m, and a long strip exhaust is provided. The side plate of the hole 17 can be disassembled from the dismantling sampler box 1, and the side plate is connected with the main body of the sampler box 1 through bolts, so as to facilitate disassembly, and at the same time, in order to more conveniently replace the components inside the sampler box 1; The number of elongated exhaust holes 17 on the side plate is six; the filter membrane of the particle sampling head 2 used for carrying the filter membrane is a circular filter membrane with a diameter of 90mm; the restrictor valve 6 has both filtering and restricting Function.

When the power switch 16 is pressed, the whole sampler is powered on, and the operation guidance is carried out through the display screen 14, and the data recording cycle of temperature, humidity, air pressure and wind speed is set through the control panel 15, and the data recording cycle can be set according to the actual situation. Set in the range of 30min ~ 180min; at the same time, set the intake air flow in the first pipe 4 and the second pipe 5 through the control panel 15. According to the actual situation, the intake air flow can be set between 60L/min and 180L/min. The particulate matter collected by the particulate matter sampling head 2 is PM10 and PM2.5, and the VOCs are collected through the VOCs collection container.

The solutions in the embodiments are not intended to limit the scope of the patent protection of the present invention, and all equivalent implementations or modifications that do not depart from the present invention are included in the scope of the patent of this case.

Claims (9)

1. The utility model provides an atmospheric particulates and VOCs integrated sampling ware which characterized in that: the device comprises a sampler box body, a particulate matter sampling head, a VOCs collecting container, a diaphragm pump, a first pipeline and a second pipeline; the sampling device comprises a sampling box body, a diaphragm pump, a particulate matter sampling head, VOCs collecting containers and a sampling device, wherein the diaphragm pump is arranged inside the sampling box body; the first pipeline is vertically arranged, the bottom end of the first pipeline is communicated with the diaphragm pump, and the upper end of the first pipeline penetrates through a top plate of the sampler box body to be connected with the particulate matter sampling head; the second pipeline level sets up, and second pipeline one end is linked together with first pipeline, and the second pipeline other end passes sample thief box curb plate and links to each other with VOCs collection container.

2. The sampler of claim 1 for integrating atmospheric particulates and VOCs, wherein: and a flow limiting valve is arranged between the second pipeline and the VOCs collecting container, a first flowmeter is arranged on the pipe body of the first pipeline, and a second flowmeter is arranged on the pipe body of the second pipeline.

3. The sampler of claim 2 for integrating atmospheric particulates and VOCs, wherein: the sampler box is outside side-mounting to have can turning over a platen, can turning over a platen and articulate on the sampler box, can turning over an angle of adjustment scope of platen and be 0 ~ 90, when can turning over a platen and be in the horizontality, can turn over the upper surface of a platen and be used for placing VOCs collecting container.

4. The sampler of claim 3 for integrating atmospheric particulates and VOCs, wherein: the sampler comprises a sampler box body, a sampler box body and a wind speed sensor, wherein the top of the sampler box body is provided with the three-factor sensor and the wind speed sensor, the three-factor sensor is used for collecting data of temperature, humidity and air pressure, and the wind speed sensor is used for collecting data of wind speed.

5. The sampler of claim 1 for integrating atmospheric particulates and VOCs, wherein: the sampler box body is provided with a handle on the top, the surface of the handle is subjected to anti-skid treatment, the bottom of the sampler box body is provided with a three-leg support, the angle adjusting range of the support legs of the three-leg support is 0-30 degrees, the height adjusting range of the support legs of the three-leg support is 1-1.5 meters, and the bottom of the support legs of the three-leg support is provided with an anti-skid pad.

6. The sampler of claim 4 for integrating atmospheric particulates and VOCs, wherein: the sampler box adopts the cuboid structure, can turn over a platen and articulate on one of them curb plate, can turn over and install display screen, control panel and switch on the curb plate of platen offside respectively, be equipped with a plurality of rectangular shape exhaust holes on all the other two curb plates of sampler box, all be equipped with the rain-proof baffle of arc along going up at every rectangular shape exhaust hole.

7. The sampler of claim 6 for integrating atmospheric particulates and VOCs, wherein: a control mechanism is arranged in the sampler box body, and comprises an intelligent terminal, a data acquisition unit, a data interface converter and a power supply; the data output ends of the three-factor sensor, the wind speed sensor, the first flowmeter and the second flowmeter are connected with a data interface converter through data lines, the data interface converter is respectively connected with an intelligent terminal and a data acquisition unit, and temperature, humidity, air pressure and wind speed data are stored and analyzed by the intelligent terminal; the diaphragm pump, the display screen and the control panel are connected with the intelligent terminal.

8. The sampler of claim 1 for integrating atmospheric particulates and VOCs, wherein: the particle sampling head comprises a protective cover, a nozzle body, a collecting plate and a filter membrane clamp, the nozzle body and the collecting plate are of replaceable structures, the nozzle body and the collecting plate are replaced to collect particles with different particle sizes, and the filter membrane clamp is used for bearing a filter membrane.

9. The sampler of claim 1 for integrating atmospheric particulates and VOCs, wherein: the VOCs collecting container adopts an inner wall inerting treatment container which is divided into a Suma tank and a gas collecting bag; when the Suma tank is adopted, the Suma tank and the flow limiting valve are hermetically connected through a threaded pipe joint, and an airtight adhesive tape is wound at the threaded connection part; when the air collecting bag is adopted, the pagoda head is connected between the air collecting bag and the flow limiting valve, and the pagoda head is connected with the air inlet of the air collecting bag in a sealing mode through the rubber pipe.

Images