Flue gas flowmeter installation introduction

The flue gas temperature at the installation point should meet the requirements of less than 700 ° C. Generally speaking, the flue gas temperature is low, the detector has a long service life, the flue gas temperature is high, and the service life is short. The detector should not be installed in a dead space where the flue gas does not flow, nor in a place where the flue gas flows quickly (such as in the expansion chamber of some bypass air passages). In addition, the flue gas leakage is required to be small, and the detector is easy to install and maintain. For medium and small boilers, it is recommended to install the superheater in front of the economizer because the flow of flue gas from the boiler system flows from the furnace to the steam drum, through the superheater, and the province. The coal machine and air preheater are discharged from the chimney after being recovered by the induced draft fan. If the measuring point is too close to the flue gas furnace outlet, the temperature will be too high, and the flow rate will be faster, which will form a corrosion corrosion to the stainless steel casing of the detector, which will shorten the service life; if the measuring point is too biased, due to the air leakage phenomenon in the flue system, Will cause the oxygen level at the measuring point to be too high, and can not accurately reflect the amount of smoke in the furnace.