Preparations and Precautions for On-site Detection of Low Nitrogen Burner
Preparations and Precautions for On-site Detection of Low Nitrogen Burner
Low-nitrogen burner is a device that integrates traditional burners by adding blowers, induced draft fans, frequency converters, control valves, and multiple circuits, so that clean energy and burner operation can provide more efficient heat for the boiler. Now let’s learn about the preparation and precautions for on-site detection of low nitrogen burners.
First: Site safety work
Before entering the site for inspection, the manufacturer or user of the low nitrogen burner shall inform the inspector of the site safety instructions, and conduct safety education and training if necessary to do a good job of safety protection.
Second: Site data preparation
In addition to the application materials provided before the application for testing, the following materials shall also be provided according to the actual situation of the site:
1. Gas or oil burner detection: the main line shall be equipped with an oil flow meter, and the flow meter verification certificate shall be provided;
Detection of biomass pellet burner: weighing device (such as an electronic scale, balance, etc.) is required on-site to weigh the actual weight of feed; Other gas or liquid fuel burner test: fuel flow meter is required for fuel consumption test on the main line;
2. Provide the fuel test report (including fuel composition analysis, calorific value, and other test items) for the on-site low nitrogen burner.
Third: Site test preparation
1. According to the regulations, there should be measuring holes (aperture 50mm – 60mm) on the flue near the furnace to facilitate smoke detection and air volume detection; There shall also be a flue gas analysis measuring hole (aperture 10mm).
2. At least one commissioning professional shall be equipped. In the process of checking the low nitrogen burner, it is necessary to check the electric control safety (the low nitrogen burner needs to be restarted at least 3 times); It is also necessary to adjust the output power of the burner and test the large and small loads to the design value of the burner. The specific steps are as follows:
Large load: adjust the flow to the design value. After the flow is stable and the flame is stable, measure the flue gas, and record the data after the flue gas value (oxygen content, nitrogen oxide) of the low nitrogen burner is stable, and measure the noise, surface temperature, and if the flue gas value does not meet the requirements, such as furnace back pressure, it is necessary to continuously adjust the low nitrogen burner status until the flue gas reaches the standard.
Small load: adjust the flow to the design value. After the flow is stable and the flame is stable, measure the flue gas, record the data after the flue gas value (oxygen content, nitrogen oxide) is stable, and measure the furnace back pressure during the measurement period. If the flue gas value does not meet the requirements, it is necessary to continuously adjust the status of the low nitrogen burner until the flue gas reaches the standard.