Thread Content
1. Purpose of inspection and cleaning: The quality of heat exchange in the air preheater directly affects the thermal efficiency of the burner in the first stage of the furnace and the importance of safe operation of the induced draft fan. If the heat exchange is not good and the preheater outlet temperature is high, it will cause damage to the induced draft fan blades. Therefore, the air preheater should be inspected and cleaned during this overhaul. 2. Tools used: 1. 2 dustpans, 4 brooms, 8 baskets 2. 10 special work clothes, 10 towels, 10 pairs of gloves 3. 10 eye protection, 20 masks, 4 temporary safety lights 4. 2 air hoses 5. 5 fine steel drills, 5 steel brushes, 2 vacuum cleaners 6. 2 sets of air respirators 1. Preparation: 1. After the replacement in the air preheater is qualified. When TI-1214 and TI-1215 drop to normal temperature, you can contact a fitter to open the manholes of the air preheater, namely the air side and the flue gas side. 2. Connect the temporary air pipe to send the air to the air preheater for later use. 3. Set up a high springboard inside the air preheater and install temporary safety lights (24V). 2. Inspection and cleaning methods and contents: 1. To enter the preheater, you must first apply for a tower entry permit. And they must work in groups of two, wear seat belts around their waists, wear work clothes, protective eyewear and masks, and have someone outside to supervise them. 2. Check whether the insulation materials on both sides have fallen off, and remove any large debris from the air preheater. 3. Check the heat exchange tube of the air preheater. If there are cracks and traces of scattered watermarks on the tube wall, leak repair measures are required. 4. Use wire brushes, steel bars or other tools to remove the scale layer on the heat exchange tubes and debris between the tubes, and use an air tube to purge the tube bundle. 5. Use a dustpan or broom to sweep out all the debris left in the preheater. 3. Safety precautions: 1. Personnel entering the equipment should wear special work clothes. There should be a dedicated person carrying an air respirator for monitoring at the manhole, and timely rescue is required if any accident occurs. 2. Workers inside the equipment are not allowed to carry small items that are not related to their work to avoid falling into the equipment. 3. After completion, check whether there are any debris or other things in the equipment and take them out. 4. There should be good ventilation before entering the equipment, and the air entering should not be contaminated. 5. Inspection and cleaning work must be meticulous and serious to ensure quality. 6. During inspection and cleaning, if there is any high-altitude operation, special attention should be paid to personal safety according to the requirements for high-altitude operations.