Boiler furnace flame centre position monitoring method

Abstract

The invention discloses a boiler furnace flame centre position monitoring method. The method comprises the following steps: 1) establishing a furnace thermal load and furnace flame central position predicting model; 2) establishing a furnace load and water-cooling wall temperature calculating model; 3) establishing databases corresponding to furnace heat load distribution and water-cooling wall temperature distribution of a boiler under different working conditions; 4) extracting actual operation data in the field; 5) calling a database according to an actual water-cooling wall temperature measurement value, and calculating furnace three-dimensional heat load distribution; 6) re-calculating the water-cooling wall temperature according to the calculating model established by the step 2), and judging whether the water-cooling wall temperature and the average error of measurement values meet requirements or not; 7) obtaining an actual furnace flame centre position according to the calculated heat load distribution and the predicting model established in the step 1), displaying the state of a flame centre in the furnace through graphics, and judging whether the flame centre is inclined or not; by adopting the method provided by the invention, the monitoring and adjusting in a furnace combusting process can be realized; guarantee is provided for the safety and economical efficiency of industrial production.

Description

technical field [0001] The invention belongs to the field of boiler furnace combustion, and in particular relates to a method for monitoring the central position of a boiler furnace flame. Background technique [0002] The flame center of the boiler furnace is an important factor reflecting the combustion status of the boiler and a direct reflection of the combustion status in the furnace. The change of the height of the flame center directly affects the ignition and burnout of pulverized coal particles, the discharge of pollutants, and the heat load distribution of the water wall and superheater. If the center of the flame deviates, it will not only affect the distribution of the flue gas temperature field and flow field in the furnace, but also affect the distribution of the heat absorbed by the heating surface, resulting in excessive heat absorption on the local heating surface, resulting in deterioration of heat transfer on the part of the heating surface and burning. A...

AI Technical Summary

Problems solved by technology

Therefore, at present, the flame monitoring system of most boilers can only judge whether the furnace is on fire (with a flame), but cannot effectively judge the center position of the flame and whether it is deflected.

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