How to measure the suction force at the roof level

(1) The uniformity of suction at the exhaust gas tray is directly related to whether the amount of air and gas supplied to the entire furnace is appropriate, as well as to whether heat distribution is even across all the combustion chambers in the furnace. (2) Select the two middle adjacent exhaust gas trays as the standard number. The standard numbers should be regularly checked and maintained to ensure that the regenerator does not catch fire, there are no leaks, the grid bricks are not blocked, and the temperature in the flue remains normal. (3) Prepare a diagonal micromanometer with a range of (-50Pa to +250Pa), as well as one rubber hose of 50m length and one of 3m length. Before starting the measurement, check and ensure that the rubber hose is free of blockages or air leaks. (4) After placing the inclined micromanometer at the site, level it out, then adjust the liquid level of the micromanometer to the 0 mark on the scale. Attach one end of a 3m long rubber tube to the “+” end of the inclined micromanometer, and attach the other end to the pressure measuring tube with the standard designation ； One end of the 50m long rubber hose is fitted over the “–” end of the inclined micromanometer, while the other end is connected to the pressure measurement tube of the exhaust gas stack being tested; the connection must be airtight to prevent leaks. (5) Measurements begin 5 minutes after the exchange, to determine the suction force of the standard exhaust platen as well as the difference in suction force between other exhaust plates and the standard one. First, the downward airflow is measured, and then the upward airflow. The suction force of gas and air was measured within four exchanges.