Sampling device for volatile gas on the surface of water body and soil and sampling method thereof

A volatile gas, soil surface technology, applied in the direction of sampling devices, etc., to achieve the effect of low cost, avoiding vacuum or high pressure, and simple composition

Inactive Publication Date: 2007-08-01
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems existing in the existing related technologies, the purpose of the present invention is to propose a water body and soil surface volatile gas sampling device and sampling method thereof which are accurate in sample collection, easy to operate and convenient to carry

Method used

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  • Sampling device for volatile gas on the surface of water body and soil and sampling method thereof

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Experimental program
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Effect test

Embodiment 1

[0019] The structure of this water body, soil surface volatile gas sampling device embodiment is as shown in Figure 1, and its system comprises the gas cylinder 1 that nitrogen compressed gas is housed, gas decompression valve 2, input gas flowmeter 3 (0-10L / min), dynamic collection box 4, output gas flow meter 3' (0-10L / min), stirring propeller 5, one-way valve 6, three-way valve 7, vacuum sampler 8 and small air pump 9 and other components. The dynamic collection box 4 is a rectangular plexiglass box (length, width, and height are 80cm, 50cm, and 50cm respectively), and the bottom is not closed to form a volatile sample collection port. The left and right sides of the box are respectively provided with an air inlet and an outlet. The air port is provided with a stirring propeller 5 (for a CPU fan) in the case. The gas storage bottle 1 is connected to the air inlet of the dynamic collection box 4 through the gas decompression valve 2 and the input gas flowmeter 3, and the ga...

Embodiment 2

[0022] With the sampling device of the present invention (as embodiment one), the method for sampling the volatile malodorous gas on the surface of the sewage pool is as follows:

[0023] In the first step, the floating material is fixed around the lower edge of the dynamic collection box 4, and then put into the sewage pool of the corresponding treatment unit of the sewage treatment plant, and the air inlet and the air outlet on both sides of the dynamic collection box 4 are used with flexible pipes ( Commercially available Teflon pipes) lead out and connect to the system;

[0024] In the second step, turn the three-way valve 7 so that its input port is connected to its first output port, and open the one-way valve 6 connecting the first output port of the three-way valve 7 with the small air pump 9, and then open the air storage Gas decompression valve 2 of bottle 1, and turn on power switch, start stirring propeller 5 and small-sized air pump 9 in the dynamic collection box...

Embodiment 3

[0028] With sampling device of the present invention (as embodiment one), the method for sampling the volatile gas on the surface of the river course is as follows:

[0029] The first step is to fix the floating material around the lower edge of the dynamic collection box 4, then put it into the surface of the river water body, and the air inlet and the air outlet on both sides of the dynamic collection box 4 are drawn out with flexible pipes (commercially available Teflon pipes) and Access to this system;

[0030] In the second step, turn the three-way valve 7 so that its input port is connected to its first output port, and open the one-way valve 6 connecting the first output port of the three-way valve 7 with the small air pump 9, and then open the air storage Gas decompression valve 2 of bottle 1, and turn on power switch, start stirring propeller 5 and small-sized air pump 9 in the dynamic collection box 4, adjust two gas flow meters to make input gas flow meter 3 and out...

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Abstract

This invention relates to one sample method and device for evaporated gas above water and earth, wherein, the device comprises the following parts: one dynamic sample box with mixture pusher; one nitrogen compression gas storage bottle through pressure release valve and input gas flow meter to the gas in mouth of sample box; the gas exit mouth is connected to the three-way valve input end with first connected to one small air pump through one single valve and with second output end connected to vacuum sample machine to form sample system.

Description

technical field [0001] The invention relates to a collection device and a collection method for volatile gases on water bodies and soil surfaces. Background technique [0002] The analysis and detection of volatile gases on water bodies and soil surfaces is an important aspect of environmental monitoring. It is usually used in environmental science research to study and evaluate the composition and diffusion flux of various volatile gases on water bodies and soil surfaces. For a long time, due to the limitations of sampling equipment and sampling methods, research on volatile gases on water bodies and soil surfaces has been relatively slow. [0003] At present, there are mainly two methods for collecting volatile gases on the water body and soil surface: the static box method and the dynamic box method. The static box method is a method of sampling directly with a sealed inverted box. The sampler (box) of this method is not connected to the outside during the sampling proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/24
Inventor 陈繁忠盛彦清
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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