Temporary shutdown of thermal oil boiler diesel burner

When the thermal oil boiler diesel burner is temporarily stopped, stop adding coal, stop blowing, and quickly close the fire door, damper and Flue baffle to maintain furnace temperature. Please note that after the blast stops, the induced wind must be delayed for 5 minutes to stop. The circulating pump will not stop until the temperature of the medium in the furnace drops below 100°C. Restart, first turn on the circulating pump, then ignite according to the fuel (gas) furnace ignition program, slowly heat up, and gradually resume combustion. Check and stop the operation of the heat-conducting oil boiler diesel combustion engine: After suspending the furnace according to the above method, when the heat-conducting oil temperature drops below 70°C, all the heat-conducting fluid will be discharged into the oil storage tank. Cut off the connection between the furnace and other equipment, clean the inside and outside of the furnace, and check the corresponding parts. Precautions for the operation of normal heat-conducting oil furnace light oil burner: Special care should be taken not to cause excessive temperature, coking and deterioration of the heat-conducting liquid during operation. Don't stop the pump in the furnace, and keep the circulating pump running until the oil temperature drops below 100°C. Fire prevention 1. Pipe burst fire 1. Poor quality of oil and too much residual carbon in the oil. If the heat transfer oil is inadvertently mixed with water, impurities or other grease during storage, transportation or operation and maintenance, when the temperature of the heat transfer oil rises to 100 ℃, it will cause oil injection and fire, or the water will evaporate at high temperature and generate high pressure, resulting in equipment An overpressure explosion occurred. Add carbon residues in the oil index. The heat transfer oil will undergo some chemical changes during the heating operation and produce a small amount of high polymer, and local overheating will produce coke. These high polymer and carbon residues are insoluble in the oil and suspended in the oil. In the operation of these substances, they will be deposited on the bottom of the drum and overheated bumps, deposited on the tube wall and overheated. Therefore, regular extraction and analysis of heat transfer oil, timely grasp of the changes in oil quality, analysis of the reasons for the changes, regular addition of new heat transfer oil to make the carbon residue basically stable, the heat transfer oil added to the boiler diesel burner must be dehydrated to find the problem in advance, and it should be timely Take corresponding measures. 2. The outlet temperature exceeds the temperature and the flow rate is too low. Sometimes due to high oil temperature and engine temperature does not rise, it cannot meet production needs. Some units take measures to increase the outlet temperature to ensure the heat supply. As a result, the outlet temperature is close to or even exceeds the maximum allowable temperature of the heat carrier, thereby increasing the degree of coking and fouling. The efficiency of heat transfer using the engine's radiator is low. , Forming a vicious circle, until the furnace tube burst. In addition, too low a flow rate will cause the temperature of most or part of the tube inner wall of the heat surface to be higher than the allowable oil film temperature, and shorten the normal service life of the heat transfer oil, resulting in drums, tube bursts and overheating. Therefore, the maximum oil temperature at the outlet of the boiler diesel burner should be about 30°C lower than the working temperature of the heat carrier to prevent the oil from overheating and decomposing during use. During operation, the speed of the heat transfer oil in the radiant heating surface pipe should not be less than 2m/s, and the speed of the heat transfer oil in the convection heating surface pipe should not be less than 1.5m/s to prevent the occurrence of carbon residue, blockage of the pipe diameter and pipe wall overheat. 2. Leakage fire Due to welding quality problems, part of the welding seam of the main heat transfer pipe will fall off or evaporate in a large amount when the temperature is too high, causing the pipe to vibrate or even be damaged, resulting in a large amount of heat leakage and conduction oil. Moreover, the heat transfer oil has strong permeability, especially at the flange gasket, which is relatively serious. Therefore, when installing, choose a qualified installation company. The pipeline connection is well welded, and the flange connection is supplemented. The screw connection cannot be used. The flange connection should use oil-resistant, pressure-resistant, high-temperature resistant high-strength graphite products as the sealing gasket . All accessories in contact with the heat carrier must not be made of non-ferrous metals or cast iron. Should steel pipe be used? 20 steel seamless pipes, fasteners, especially connecting bolts on the main circuit are not used. 35 steel drums are more suitable. Before the boiler diesel burner is ignited, the boiler diesel burner supervision office and the installation company shall conduct pressure tests on all pipes and valves until leakage is found. The heat transfer oil should circulate in the system pipeline for no less than 60 minutes, and the ignition should be performed after confirming that it is normal. 3. Power failure and fire. When the thermal oil boiler diesel burner is in normal use, the device will occasionally lose power. At this time, the circulating oil pump stops working and the coal in the furnace continues to burn, so that the oil temperature of the boiler diesel combustion engine continues to rise. Therefore, in the event of a power failure and other failures, all furnace doors should be opened to immediately eliminate the remaining coal in the furnace, let a large amount of cold air enter the furnace, quickly reduce the furnace temperature, and eliminate the heat source; open the drain valve of the boiler diesel combustion engine synchronously. Slowly put the high-temperature oil into the oil storage tank, and let the cold oil in the expansion tank slowly flow into the boiler diesel burner to take away heat in time. Conditional devices can be equipped with dual power sources, such as small gasoline generators, whose circuits and circulation pump circuits are switched to prevent accidents caused by high oil temperature coking in a short time after power outage. In addition, the stoker must be trained by the technical supervision department and issued a 'stoker operation certificate'. Only a licensed stoker can operate independently to ensure that abnormal situations are eliminated in time. Keep the circulating pump and the oil storage tank clean, remove the oil and dust accumulated on the surface at any time, and strictly prohibit external flying fire. Matters needing attention 1. For the oil and gas heat carrier boiler diesel burner using heat transfer oil as the heat carrier, the system should be equipped with an expansion tank, a water storage tank, safety components, measuring instruments and control devices. 2. When the heat transfer oil is put into use, start the circulating oil pump during the running phase, and start ignition and heating after running for half an hour. When using for the first time, the temperature should rise slowly, about 20℃ per hour. When the temperature rises to 180~200℃, the temperature should be kept for a period of time before normal use. 3. When using, check carefully and strictly prevent the leakage of water, acid, alkali and low boiling point substances into the use system. The system should be equipped with a filter device to prevent all kinds of debris from entering and to ensure the purity of the oil. 4. After six months of use, oil analysis should be performed. If poor heat transfer or other abnormal conditions are found after long-term use, the oil should be analyzed, added or replaced according to the analysis results. Standard dosage: basic carbon must not be greater than 1.0%, acid value must not be greater than 0.5mgK(OH)/g, ignition point change must not be less than 20%, viscosity change must not be greater than 10%, and the new oil should be replaced. 5. In order to ensure the normal service life and heat conduction effect of heat transfer oil, it is strictly prohibited to use over temperature. The design and installation of the heating system of the heat-conducting oil burner light oil burner shall strictly follow the design rules of the heat-conducting oil burner light oil burner formulated by the relevant state departments to ensure the safe operation of the system.
! If you are interested in diesel combustion engines, please contact us for a quote!