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Pesticide industry site volatile odor substance sampling and evaluation device and evaluation method

An evaluation device and volatility technology, applied in sampling devices, measuring devices, sampling, etc., can solve problems such as disturbance, large changes in the concentration of odorous substances, and large differences in diffusion attenuation of odorous substances, and achieve the effect of ensuring uniformity

Inactive Publication Date: 2019-10-22
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different sampling heights have large differences in the diffusion and attenuation of odorous substances, resulting in large changes in the concentration of odorous substances, and are easily disturbed by wind direction, wind force and other climatic conditions, directly affecting the evaluation results of ambient air quality

Method used

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  • Pesticide industry site volatile odor substance sampling and evaluation device and evaluation method
  • Pesticide industry site volatile odor substance sampling and evaluation device and evaluation method
  • Pesticide industry site volatile odor substance sampling and evaluation device and evaluation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Volatile odor substances are collected in a pesticide industry site. The box body 1 has a square design of 50cm×50cm×150cm in length, width and height. The temperature inside the cabinet 1 is 24.2°C, and the relative humidity is 86.7%. The rain-proof device 9 is used to place above the sampling hole 2 of the cabinet to prevent the power supply device 5 from being wet by rain during sampling.

[0056] Turn on the fan 4 switch, unscrew the sealing plug 3 of the sampling hole 2 of the sampling evaluation device after 1 hour, and use the air bag to collect the gas in the box body 1, refer to "Ambient Air Volatile Organic Compounds Determination Adsorption Tube Sampling - Thermal Desorption Gas Chromatography - Mass spectrometry" (HJ644-2013) for detection, the concentration of benzene is 468.7μg / m 3 .

[0057] As a control, a synchronous sampling was performed at a height of 1.5 meters outside the sampling evaluation device. The sampling method was the same as in Example 1...

Embodiment 2

[0063] Volatile odor substances are collected in a pesticide industry site. The box body 1 has a square design of 50cm×50cm×100cm in length, width and height. The temperature inside the cabinet 1 is 25.1° C., and the relative humidity is 90.5%.

[0064] Turn on the fan 4 switch, unscrew the sealing plug 3 of the sampling hole 2 of the sampling evaluation device after 6 hours, and use the air bag to collect the gas in the box body 1, refer to "Ambient Air Volatile Organic Compounds Determination Adsorption Tube Sampling - Thermal Desorption Gas Chromatography -Mass spectrometry" (HJ644-2013) for detection, the gas concentration of volatile benzene was 687.3, 685.4, 686.1 μg / m3 respectively 3 .

Embodiment 3

[0066] Volatile odor substances are collected in a pesticide industry site, and the box 1 is a cylindrical design with a diameter of 50 cm and a height of 150 cm. The temperature inside the cabinet 1 is 28.6° C., and the relative humidity is 80%.

[0067] Turn on the fan switch, use an air bag to collect samples and evaluate the gas in the device after 2 hours and 3 hours respectively, refer to "Determination of Volatile Organic Compounds in Ambient Air Adsorption Tube Sampling - Thermal Desorption Gas Chromatography - Mass Spectrometry" (HJ 644-2013) Detected, the concentration of ethylbenzene obtained was 137.8 μg / m 3 and 185.0 μg / m 3 .

[0068] According to the rate of change of gas concentration with time, the average emission flux (F) of ethylbenzene from 2 hours to 3 hours can be calculated as 64.09 μg m -2 h -1 .

[0069]

[0070] In the formula: ρ is the density of the gas in the standard state, that is, 4.74g L -1 ; H is the height of box 1, that is, 1.5m; T ...

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Abstract

The invention discloses a pesticide industry site volatile odor substance sampling and evaluation device and an evaluation method. The pesticide industry site volatile odor substance sampling and evaluation device comprises a box body, a sampling hole, a sealing plug, a fan and a power supply device. The bottom portion of the box body is opened and the upper surface of the box body is sealed. Thesampling hole is in the upper surface of the box body to make the inner portion of the box body communicated with the outside world. The sealing plug is located in the sampling hole and is used for sealing the sampling hole. The fan is located in the box body. The power supply device is electrically connected with the fan. The device eliminates the interference of weather conditions of wind powerand wind direction and the like, ensures uniformity of gas emission conditions of volatile odor substances, obtains emission flux of the odor substances and can calculate discharge amount of the odorsubstances in soil per square meter per unit time and can be used for quantitatively evaluating the project effect of odor covering and sealing measures; and by synchronously obtaining the temperatureand humidity data in the box body, the device can analyze the influencing factors of the unpleasant odor conveniently.

Description

technical field [0001] The invention relates to a sampling evaluation device and evaluation method for volatile odorous substances, in particular to a sampling evaluation device and evaluation method for volatile odorous substances in pesticide industry sites. Background technique [0002] Odor or odor pollution is a nuisance pollution that is closely related to the living environment of the people and is an important livelihood issue. According to statistics from the National Environmental Protection Reporting Management Platform, in 2017, national odor / odor complaints accounted for about 18% of all environmental complaints. Odor disturbance not only affects people's normal life and reduces the quality of people's living environment, but also easily becomes the focus of public opinion, which is one of the important ecological and environmental problems that need to be solved urgently. [0003] In recent years, due to the rapid development of urbanization and the expansion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22G01N30/02G01N33/00
CPCG01N1/2294G01N33/0009G01N30/02
Inventor 王风贺程谊蔡祖聪张金波周艳苗家赫
Owner NANJING NORMAL UNIVERSITY
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