Study on High Precision Measurement System of Dust Content in Gas

It is necessary to measure the dust content with high precision for the blast furnace gas when it is reused by a combined cycle power plant. It can improve the measurement accuracy effectively to investigate on the measurement results affected by different factors. The fiber diameter, dust particle diameter and sampling time which has influence on the result of the measurement was studied, The results show that the superfine glass fiber has high dust collection efficiency, and it can successfully collect the dust particles which has the diameter less 10 μm. The best sampling time is 5 minutes. Through the calculation of the standard deviation value with the membrane filter and filter tube constant speed sampling device with different wind speed, it proves that the filter tube constant speed sampling device has a relatively good repeatability.