Portable flue gas sampling device

Abstract

The invention discloses a portable flue gas sampling device. The device comprises a box as well as a flue gas filter, a sampling pump and more than two sampling rate precise-control lines which are mounted in the box, wherein the flue gas filter is connected to an input end of the sampling pump, and the more than two sampling rate precise-control lines are connected to an output end of the sampling pump in parallel. The device has the advantages of low production cost, low energy consumption, low size and weight and convenience in carrying.

Description

technical field [0001] The invention relates to smoke sampling technology, in particular to a portable smoke sampling device. Background technique [0002] Flue gas containing various harmful components is usually produced in the production process of metallurgy, electric power and chemical industries. Such flue gas needs to be treated accordingly to meet the emission requirements stipulated by national standards. Among them, the determination of the concentration of sulfide, fluoride and chloride in harmful flue gas is the premise and basis of flue gas treatment design. [0003] At present, the relevant national standards for the detection methods of the concentration of sulfide, fluoride, and chloride in harmful flue gas have clear regulations, but the flue gas sampling involved in the detection process only provides a way of thinking. Based on different understandings of flue gas sampling ideas by different inspectors, there are various methods of flue gas test sampling,...

AI Technical Summary

Problems solved by technology

[0004] One is that the sampling system is complicated, and it is very troublesome to set up. During the test, there are many components to be controlled. If you don’t pay attention, you need to retest. It is very inconvenient to use, especially in the transportation distance.

[0005] The second is that for the sampling device built with many parts, it is impossible to achieve better maintenance and maintenance, which will greatly reduce the efficiency of the entire system and the service life of each part. However, the actual situation of the flue gas has not been fully considered, which makes the sampling device not resistant to high temperature, easy to block and easy to corrode during use.

[0006] The third is that the detection of fluoride and chloride takes a long time, and the shortest time should not be less than 1.5h. Therefore, when measuring some flue gas conditions with large fluctuations, test the fluoride and chloride before proceeding. In the test of sulfur dioxide, the composition of the flue gas has changed greatly, making it impossible to test the contents of different components in the flue gas at the same time. The test results obtained in this way are greatly reduced in reference value for the design of flue gas treatment.

[0007] Fourth, the accurate analysis of flue gas components has certain requirements on the flue gas flow rate. Due to this requirement, the power of the flue gas sampling pump cannot be too large, so any change in pipe resistance in the entire flue gas sampling system will directly affect the sampling. The operation of the pump, in order to make the test more accurate in the test of sulfur dioxide, will inevitably cause a large change in the pipe resistance of the flue gas outlet, which will cause a large difference between the actual sampling volume and the intended sampling volume

Images