Spiral-flow type flue gas fly ash sampling pipe

Abstract

A spiral-flow type flue gas fly ash sampling pipe is characterized by comprising an exhaust pipe, a sampling pipe, spiral-flow air inlet pipes and a sealing support box, wherein the sampling pipe comprises a straight pipe section and a cone pipe section, the diameter of the cone pipe section gradually decreases from top to bottom, the diameter of the spiral-flow air inlet pipes gradually decreasesfrom the front end to the rear end, the rear ends of the spiral-flow air inlet pipes tangentially communicate with the side wall of the straight pipe section of the sampling pipe, the spiral-flow airinlet pipes are vertical to the pipe wall of the straight pipe section of the sampling pipe, sampling nozzles are installed at the front end ports of the spiral-flow air inlet pipes; the exhaust pipeis L-shaped, and the longer pipe section thereof is installed in the straight pipe section of the sampling pipe; an ash collecting bottle is arranged in the sealing support box, and the lower end ofthe cone pipe section of the sampling pipe is deeply inserted in the sealing support box and connected to the ash collecting bottle. The device is simple in structure, and easy to operate, facilitatessampling, and meanwhile, ensures the accuracy of sampling detection due to multi-channel sampling.

Description

technical field [0001] The invention relates to an air flow fly ash sampling device, in particular to a swirl type flue gas fly ash sampling tube. Background technique [0002] In the industrial field, coal-fired power plants, petrochemical, energy, chemical and other industrial fields all involve waste gas emissions or high-temperature pyrolysis gas, air for preheating, etc. The detection of fly ash and smoke in these airflows is of great significance. For example, the detection of smoke in exhaust gas can analyze the combustion status of boilers, and the detection of fly ash content directly determines whether the exhaust gas meets environmental protection requirements. The properties directly determine the quality of pyrolysis gas, and the quality of air for waste heat or hot gas for combustion also directly affects the life and corrosion of equipment. It can be seen that the sampling and analysis of airflow fly ash is of great significance in the industrial field, and t...

AI Technical Summary

Problems solved by technology

[0003] At present, the fly ash sampling device has the following problems: 1. The sampling position is single, and the sampling point is inconvenient to move, or the instrument needs to be reinstalled when the sampling needs to be changed, which is very inconvenient to operate

2. Although some sampling tubes have high precision, they are complex in installation and cumbersome in electrical system, making it difficult to maintain and maintain

3. Sampling at the opening on the pipeline also takes out waste gas or other toxic gases, which may easily cause airflow leakage and affect the health of sampling personnel

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