System and method for sampling and monitoring atmospheric pollutants discharged by rural household cooking range

Abstract

The invention discloses a system and method for sampling and monitoring atmospheric pollutants discharged by a rural household cooking range. The system comprises a combustion furnace, a sampling gun,a pre-dilution pipe, a dilution system and a sampling system. According to the invention, the combustion furnace part adopts the design of a combustion furnace with a changeable hearth, so that the emission condition of a pollution source is better restored; the pre-dilution pipe is additionally arranged, so that the dilution ratio adjusting range is expanded; flue gas purification is added, andstrict conditions of a laboratory are met; and offline sampling, online monitoring analysis and multi-channel grading sampling can be taken into consideration, a complete combustion flue gas emissiontotal amount particle sample is obtained, an online calibration function is achieved at the same time, the fluctuation situation of concentration sections of all orders in the combustion process is deeply understood and complemented with one another, the reliability is high, and the discharge characteristics of the stationary pollution source can be studied more comprehensively.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring, and relates to a sampling and monitoring system for atmospheric pollutants emitted by rural household stoves, in particular to a multi-stage dilution of flue gas discharged from stoves of various types and sizes in rural households that can be used on multiple occasions Then, the system and method for collecting and monitoring particulate matter and black carbon are simultaneously adopted on-line and off-line equipment. Background technique [0002] Civil biomass combustion sources have the characteristics of unstable emission conditions, short combustion time, and incomplete combustion. Even if the flue gas concentration of the same stove fluctuates greatly under different combustion conditions, it is difficult to use fixed sampling methods to measure its pollutant emissions. . The existing commonly used monitoring methods include direct sampling method, dilution sampling metho...

AI Technical Summary

Problems solved by technology

The dilution sampling devices of the original technology are mostly used for stable power plant boiler pollution sources, lacking the analog monitoring and sampling technology of civilian sources, and the components are complex and difficult to integrate and operate. Due to the quantitative emission monitoring, most of them are of fixed size and the site applicability is not high.

[0003] The existing domestic dilution devices have many defects, complex and bulky, most of the instruments are integral devices, cannot be disassembled, occupy a large area, and are difficult to adapt to pollution emission sampling in narrow spaces

At the same time, the existing devices are only suitable for a single place, and most of them are field tests, which cannot be well simulated in the laboratory

[0004] In actual life, the size of the combustion furnace used in rural areas has an impact on the full combustion of fuel combustion. Most of the original technology combustion devices are fixed-size combustion furnaces, which do not simulate the real smoke emission concentration.

[0005] The adjustable range of the dilution factor of the original technology is small, and it is difficult to ensure the stability and airtightness of the system after the external multi-stage dilution device is connected. The experimental results of the sampling process are relatively rough, and it is difficult to match the precision monitoring instrument with a small detection range

Images