Preparation and precautions for on-site testing of low nitrogen burners

Preparation and precautions for on-site testing of low nitrogen burners
Low nitrogen burner is a device that integrates traditional burners by adding blowers, induced draft fans, frequency converters, control valves, and multiple circuits, enabling clean energy and burner operation to provide more efficient heat to the boiler. Let's take a look at the preparation work and precautions for on-site testing of low nitrogen burners.
1、 On site safety work
Before entering the site for inspection, low nitrogen burner production enterprises or users should inform the inspectors of the on-site safety instructions, conduct safety education and training if necessary, and do a good job in safety protection.
2、 Preparation of on-site materials
In addition to the application materials provided before applying for testing, the following materials need to be provided based on the actual situation on site:
1. Gas or fuel burner detection: The main line must have a fuel flow meter and provide a flow meter calibration certificate;
Biomass particle burner detection: on-site weighing devices (such as electronic scales, scales, etc.) are required to weigh the actual weight of the feed; Testing of other gas or liquid fuel burners: The main line requires a fuel flow meter for fuel consumption testing;
2. Provide fuel testing reports for on-site low nitrogen burners (including fuel composition analysis, calorific value, and other testing items).
3、 Preparation for on-site testing
1. According to regulations, there should be measuring holes (with an aperture of 50mm-60mm) on the exhaust duct near the furnace, which is convenient for smoke detection and air volume detection; There should also be a smoke analysis measurement hole (with a diameter of 10mm).
2. Equip at least one debugging professional. During the process of checking the low nitrogen burner, it is necessary to check the electrical 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:
High load: Adjust the flow rate to the design value. After the flow rate is stable and the flame is stable, measure the flue gas and record the data of the low nitrogen burner flue gas value (oxygen content, nitrogen oxides) after stabilization. Measure the noise, surface temperature, and if the flue gas value does not meet the requirements, such as furnace back pressure, continuously adjust the low nitrogen burner state until the flue gas meets the standard.
Small load: Adjust the flow rate to the design value. After the flow rate stabilizes and the flame stabilizes, measure the flue gas, record the stabilized flue gas values (oxygen content, nitrogen oxides), 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 state of the low nitrogen burner until the flue gas meets the standard.