Detection method of no-clean particulate matter concentration as well as sampling apparatus and sampling device

Abstract

The invention relates to the technical field of the sampling of particulate matters in catering lampblack waste gas, and particularly to a detection method of no-clean particulate matter concentration as well as a sampling apparatus of the no-clean particulate matter concentration and a sampling device of the no-clean particulate matter concentration. The method detects the concentration of the particulate matters on the basis of a weighing method by adopting the detachable sampling apparatus; the sampling apparatus comprises a first half shell, a second half shell and a lampblack filter core; the lampblack filter core is arranged in a cavity formed by the first half shell and the second half shell; the lampblack filter core comprises a first membrane structure and a second membrane structure. The sampling device comprises the sampling apparatus. The problems that the traditional test method is not suitable for detecting the particulate matter concentration of the catering lampblack, the workload is large, the sampling apparatus is difficult to clean manually, a great amount of chemical reagents such as tetrachloromethane are used, the test is inaccurate, and the like can be solved.

Description

technical field [0001] The invention relates to the technical field of particulate matter sampling in cooking fume waste gas, in particular to a detection method for no-cleaning particulate matter concentration, a sampling device for no-cleaning particulate matter concentration, and a sampling device for no-cleaning particulate matter concentration. Background technique [0002] Catering oil fume refers to the volatilized oil, organic matter and thermal decomposition or pyrolysis products during food cooking and processing. Catering fume is a mixture of gaseous, liquid and solid particles and air, most of which are highly viscous particles formed by oil mist and water mist, and a small part of them are solid particles; the main organic The components are aldehydes, ketones, hydrocarbons, fatty acids, alcohols, aromatic compounds, lactones, heterocyclic compounds, etc. The particle size of liquid and solid particles is generally <10μm; the gaseous part is emitted as volat...

AI Technical Summary

Problems solved by technology

This standard sampling and analysis method has the following technical disadvantages: (1) the metal filter cartridge used in the oil fume detection needs to be cleaned after each test, and the cleaning operation is complicated and consumes a large amount of chemical reagents such as carbon tetrachloride; (2) sampling Time and sampling conditions are demanding, and some small restaurants are difficult to meet the requirements; (3) Infrared spectrophotometry is to measure CH, CH 2 、CH 3 Based on the absorbance at the characteristic band, the test object is not comprehensive and the representativeness is poor; (4) The test operation is complicated and the workload is heavy

[0005] Some local catering industry emission standards have adjusted and increased the emission limits of particulate matter and VOCs, but the existing "Measurement of Particulate Matter in Exhaust Exhaust from Stationary Pollution Sources and Sampling Methods of Gaseous Pollutants" (GB / T16157-1996) does not apply to cooking fume The main reasons for the detection of the concentration of particulate matter are as follows: (1) This test method is only applicable to the concentration of particulate matter higher than 50mg / m 3 , measured below 50mg / m 3 (2) This test method uses a glass fiber filter cartridge to filter particulate matter, and the glass fiber filter cartridge has poor lipophilicity, and the oil fume organic particulate matter has a low bearing capacity and is easy to penetrate; (3) The glass fiber filter cartridge The shape is complicated, and after each sampling, it is necessary to perform complex and difficult cleaning operations on the sampling nozzle, the front elbow, the main body of the sampling tube, etc., and the cleaning needs to consume chemical reagents such as acetone and carbon tetrachloride; Food cooking and other operations make the humidity higher, and the glass fiber filter cartridge is affected by the high humidity of the oil fume, and its strength is significantly reduced. When the filter cartridge is picked up with tweezers after sampling, the filter cartridge is likely to be broken, causing test errors, which is harmful to the operator's skills. High standard

[0006] In summary, the existing test methods are not suitable for the detection of the concentration of high-viscosity, organic-based particulate matter such as cooking oil fume, the sampling device is difficult to clean manually, a large number of chemical reagents are used, and the test is inaccurate.

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