First, the reason for the large gas consumption of gas boilers

The gas consumption of gas-fired boilers is mainly due to two factors. One is the increased boiler load; the other is the reduced thermal efficiency of the boiler. The details are as follows:
1. Influence of load factors. It is mainly in the premise that there is no meter, we measure the heat output according to conventional knowledge. When the user is unstable, the heat consumption increases, so the boiler load is increased. And because the boiler output does not have a meter, it will be mistaken for an increase in gas consumption;
First, the reason for the large gas consumption of gas boilers
2. Thermal efficiency decreases. There are many factors for the decline in thermal efficiency. List several points that are often encountered, and check against:
Due to the fouling of the boiler caused by water quality, the heat transfer efficiency of the heating surface is reduced. The thermal resistance of scale is 40 times that of steel, so a 1mm scale will increase fuel consumption by 15%. You can open the drum to check the scale directly, or you can check the fume exhaust temperature to determine whether it is scaling. If the fume exhaust temperature is higher than the temperature given in the drawing, it can basically be determined that the fouling is caused;
Fouling on the outer surface of the heated surface can also cause increased fuel consumption. This is mainly because the low temperature is easy to cause fouling on the outer surface of the heated surface. Can enter the furnace for inspection, and can also be determined by detecting the exhaust temperature;
Severe air leakage from the boiler. Excessive cold air enters the furnace, and the oxygen content of the flue gas increases. If there is a flue gas oxygen detector, if the oxygen content of the flue gas exceeds 8%, there will be excess air and there will be heat loss. Air leakage can be determined by detecting the oxygen content of the flue gas;
The quality of the gas decreases and the concentration decreases. This requires professional analysis;
Burner automatic adjustment failed. The combustion of the burner is mainly adjusted by the automatically adjusted “air-fuel ratio”. Because the sensor or computer program is unstable, although the combustion is normal, it will cause “chemically incomplete combustion heat loss”. Observe the burning flame, red fire means poor burning, blue fire means good burning. Combined with the foregoing content for comprehensive analysis and processing.

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