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Continuous measuring device and method for volatile organics in soil

A technology of volatile organic compounds and detection devices, which is applied in the direction of measuring devices, soil material testing, material inspection products, etc., can solve the problems that the online continuous detection of volatile organic compound concentration cannot be realized, and achieve short test period, high detection accuracy and logistics The effect of low demand

Active Publication Date: 2014-12-03
SHANGHAI MUNICIPAL ENG DESIGN INST GRP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Continuous measuring device and method for volatile organics in soil
  • Continuous measuring device and method for volatile organics in soil
  • Continuous measuring device and method for volatile organics in soil

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Embodiment 1

[0026] Such as 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 carrie...

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 measuring device for volatile organics in soil. The measuring device comprises a hollow shell and is characterized in that a drilling bit is arranged at the lower end of the shell; a thread connector is arranged at the upper end of the shell; a carrier gas leading-in pipe and a carrier gas leading-out pipe are arranged in the shell; the carrier gas leading-in pipe is communicated with the bottom of the carrier gas leading-out pipe; an opening is formed in the side wall, near the carrier gas leading-out pipe, of one side of the shell; a waterproof permeable thin film is arranged at the opening; an opening is formed in the carrier leading-out pipe and is communicated to the permeable thin film; a heating part is arranged at the side wall of the shell below the waterproof permeable thin film. The device is convenient to operate, short in testing period, low in logistics requirement and high in measuring accuracy and quite suitable for pollutant investigation of cities and suburban oil which need a large amount of outer field measuring and analyzing.

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 Applications(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
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