Low-concentration smoke dust sampling device and method

A sampling device and low-concentration technology, which are applied in the field of low-concentration smoke and dust sampling devices, can solve problems such as insufficient collection efficiency, distorted test results, and damage to filter materials, so as to achieve an environment that is not easily polluted, avoids deposition, and avoids moisture condensation. Effect
CN105181402AInactive Publication Date: 2015-12-23ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
Publication Date
2015-12-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a low-concentration smoke dust sampling device. The low-concentration smoke dust sampling device comprises a main machine, a sampling gun, a condenser and a drier. The sampling gun comprises a handle, a sampling tube, a pitot tube and a thermocouple, wherein the sampling tube, the pitot tube and the thermocouple are connected with the handle. The gas outlet end of the sampling tube is sequentially connected with the condenser, the drier and the main machine. The thermocouple and the pitot tube are connected with the main machine. A multi-stage sampling head is installed at the head of the sampling tube. A sampling nozzle is arranged at the front end of the multi-stage sampling head. The multi-stage sampling head comprises a shell and three dust collection units arranged in the shell. The dust collection units are sequentially arranged in the flowing direction of smoke. The smoke entering the sampling tube is sequentially in contact with the dust collection units, smoke dust is adsorbed by the dust collection units, and the smoke dust collecting efficiency of the device is improved. The invention further discloses a low-concentration smoke dust sampling method in which the device is adopted. By means of the low-concentration smoke dust sampling device and method, the concentration of the smoke dust is accurately measured under the low-concentration and high-humidity working condition.
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Description

technical field

[0001] The invention relates to the field of environmental detection, in particular to a low-concentration smoke sampling device and method. Background technique

[0002] GB / T16157-1996 "Determination of Particulate Matter in Exhaust from Stationary Pollution Sources and Sampling Method of Gaseous Pollutants" stipulates the method of isokinetic sampling and measurement of smoke and dust. It is recommended to use filter cartridges to collect particulate matter in flue gas and determine its concentration. Most of the existing smoke sampling devices and methods also adopt the filtration method (filter cartridge or filter membrane) to collect the smoke. However, with the continuous improvement of my country's environmental protection requirements, the existing dust sampling methods have great limitations in the low-concentration dust testing represented by coal-fired power plants: 1) when the dust concentration is very low (5mg / m 3 Below), the particle compositi...

Claims

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