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A continuous detection device and detection method for volatile organic compounds in soil

A volatile organic compound and detection device technology, which is applied in measurement devices, soil material testing, material inspection products, etc., can solve the problem of inability to realize online continuous detection of volatile organic compounds concentration, and achieve short test cycles, low logistics requirements, and volume. small effect

Active Publication Date: 2016-03-09
SHANGHAI MUNICIPAL ENG DESIGN INST GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structure of the device used to collect volatiles in this test system is relatively simple. The gaseous volatile organic compounds at a certain depth of the soil are only sucked away by the exhaust fan, and it needs to stay at each depth for a certain period of time. On-line continuous detection of volatile organic compound concentration

Method used

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  • A continuous detection device and detection method for volatile organic compounds in soil
  • A continuous detection device and detection method for volatile organic compounds in soil
  • A continuous detection device and detection method for volatile organic compounds in soil

Examples

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Embodiment 1

[0026] like figure 1 As shown, a device for continuously detecting volatile organic compounds in soil according to the present invention includes a drill bit 1 , a threaded joint 2 , a heating element 3 , a carrier gas inlet tube 4 , a carrier gas outlet tube 5 and a waterproof and breathable film 6 . The outer wall of the continuous detection device for volatile organic compounds in soil is made of hard metal material, and the inside is hollow; the drill bit 1 is located at the lowermost end of the device, and the threaded joint 2 is located at the uppermost end of the device, which can be connected with a hollow dowel bar , the dowel bar is connected to the hydraulic power unit on the ground; the carrier gas inlet pipe 4 and the carrier gas outlet pipe 5 are located inside the device, and the bottoms of the two are connected in a "U shape", and the carrier gas inlet pipe is connected to the carrier gas on the ground The gas cylinder is sealed and connected, and the carrier g...

Embodiment 2

[0037] A continuous detection device and detection method for volatile organic compounds in soil according to the present invention is used to detect and analyze a site polluted by petroleum hydrocarbons in northern Shanghai, so as to understand the direction of diffusion of pollutants and the scope of pollution. In the case of avoiding underground facilities as much as possible, 25 investigation and monitoring points were arranged using the grid layout method, and the device of the present invention was used to detect the concentration of pollutants at different depths at each point. The volatile organic compound detection and analysis equipment was GC- FID, nearly 14,000 sets of FID response data were obtained on site.

[0038] Cross-sectional plots according to FID response values ​​( image 3 ), there are two different polluted areas, Area 1 and Area 2, in this site. The monitoring points covered by area 1 are P5, P19 and P20, and the pollutant distribution depth range is...

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Abstract

The invention provides a continuous detection device for volatile organic compounds in soil, which comprises a hollow shell inside, and is characterized in that a drill bit is arranged at the lower end of the shell, a threaded joint is set at the upper end of the shell, and the inside of the shell is A carrier gas inlet pipe and a carrier gas outlet pipe are provided. The bottom of the carrier gas inlet pipe and the carrier gas outlet pipe are connected. An opening is provided on the side wall of the housing near the side of the carrier gas outlet pipe. The opening is provided with a waterproof and breathable The carrier gas outlet pipe is provided with an opening, which is connected to the waterproof and breathable membrane, and the side wall of the housing below the waterproof and breathable membrane is provided with a heating component. The invention has the advantages of convenient operation, short test cycle, low logistics demand and high detection precision, and is very suitable for urban and suburban soil pollutant investigations requiring a large number of field detection and analysis.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and soil restoration, and relates to a continuous detection device for volatile organic compounds in soil and a detection method thereof. Background technique [0002] Volatile organic compounds (VOCs) refer to organic compounds with a saturated vapor pressure exceeding 70.91Pa or a boiling point less than 260°C at room temperature. They are the most common pollutants emitted by industries such as petroleum, chemical, pharmaceutical, printing, building materials, and spraying. Volatile organic compounds in soil have pollution characteristics different from other pollutants such as concealment, inhomogeneity, volatility, and toxicity. They have complex components and high potential dangers. They should be given priority in soil pollution control. [0003] For soil contaminated sites, site investigation and evaluation are the premise and foundation of pollution control work, and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24G01N30/02
Inventor 朱煜张辰王磊吕永鹏谭学军谢胜
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP