How to effectively deal with the sudden power failure when the diesel burner of the thermal oil boiler is running?

In the daily production process, there will always be unexpected things. For example, a sudden power failure occurs during the heating operation of the thermal oil boiler diesel burner, which will have a great impact and hidden dangers on the quality of the boiler diesel burner. So let's explain in detail the impact of power outage on the diesel burner of the thermal oil boiler. The impact of sudden power failure on the heat transfer oil boiler diesel burner When the heat transfer oil boiler diesel burner encounters a power failure, the heat transfer oil boiler diesel burner is in normal use, and the unit occasionally has a sudden power failure. At this time, the circulating oil pump stops working and the coal combustion in the furnace continues During combustion, the oil temperature of the boiler diesel combustion engine will continue to rise. If the oil temperature rises too fast and cannot fall, the oil temperature will be locally super high and coke in a short period of time, causing the overheated tube to burst and cause a fire. 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 oil discharge valve of the boiler diesel burner simultaneously to The high-temperature oil is slowly put into the oil storage tank, and the cold oil in the expansion oil tank is slowly flowed into the boiler diesel burner to take away heat in time. Conditional units can be equipped with dual power sources, such as a small gasoline generator, whose circuit and circulating oil pump circuit are switched to each other, so as to prevent excessive oil temperature in a short period of time after a power failure, which may cause coking, which may lead to accidents. Emergency measures for the heat-conducting oil boiler diesel burner after a sudden power failure. When the heat-conducting oil boiler light oil burner is suddenly powered off, effective safety protection measures must be taken to avoid the heat-conducting oil overheating and the heating surface metal from overheating. The main measures are: 1. Open all the doors of the heat-conducting oil burner light oil burner, quickly take out the fuel in the furnace, so that a large amount of cold air enters the furnace, and the furnace temperature is quickly reduced. At the same time, quickly close the main oil outlet valve, open the oil drain valve, and slowly discharge the high-temperature oil into the oil storage tank, and let the cold oil in the expansion oil tank slowly flow into the boiler diesel burner to take away heat in time; 2. The combustion engine is equipped with a backup power supply or a backup oil pump driven by a gasoline engine. Once the power is cut off, it will start immediately, thereby reducing the loss caused. Dangers caused by improper disposal of the heat-conducting oil boiler diesel burner after power failure and solutions 1. Fire caused by bulging and pipe bursting. The oil quality is poor, and the carbon residue index in the oil exceeds the standard. When the heat transfer oil is inadvertently mixed with moisture, impurities or other oils during storage, transportation or operation and maintenance, when the heat transfer oil is heated to 1000 degrees, it will cause fuel injection and fire, or the moisture will vaporize and generate high pressure when heated, causing Overpressure explosion of equipment. In addition, the carbon residue index in the oil exceeds the standard. The heat transfer oil will undergo some chemical changes during the heating operation to generate a small amount of high polymer. At the same time, it will also generate coke due to local overheating. These high polymer and carbon residue are insoluble in the oil and suspended in the oil. During operation, these substances will deposit on the bottom of the drum and overheat and bulge, and deposit on the tube wall and burst the tube due to overheating. Therefore, regular sampling and analysis of the heat transfer oil, timely grasp of the quality change of the oil, analysis of the reasons for the change, regular supplement of new heat transfer oil, so that the residual carbon amount is basically stabilized, and the heat transfer oil added to the boiler diesel burner must be dehydrated in advance. If problems are found, corresponding measures shall be taken in time. The outlet temperature is too high and the flow rate is too low. Sometimes due to the high oil temperature, the heat engine temperature cannot rise, which cannot meet the production needs. Some units have adopted the method of increasing the outlet temperature to ensure the heat supply. As a result, the outlet temperature is close to or even exceeds the maximum allowable use temperature of the heat carrier, which increases the degree of coking and fouling. The heat transfer efficiency of the radiator using the heat engine is lower, resulting in The vicious circle is repeated until the furnace tube bursts. In addition, too low a flow rate will cause the temperature of most or part of the inner wall of the tube on the heating surface to be higher than the allowable oil film temperature, which will shorten the normal service life of the heat transfer oil, resulting in overheating and tube bursting. Therefore, the maximum outlet oil temperature of the boiler diesel burner should be about 30 degrees lower than the working temperature of the heat carrier to prevent the oil from being overheated and degraded during use. During operation, the flow rate of the heat transfer oil in the radiant heating surface tube is not less than 2m/s, and the convection heating tube is not less than 1.5m/s to prevent the occurrence of carbon residue, blockage of the pipe diameter, and overheating of the pipe wall. 2. Leakage causes fire. Due to welding quality problems, the welding seam of the heat transfer main pipe is partially peeled off or a large amount of vaporization occurs under over-temperature conditions, causing pipeline vibration or even damage, resulting in a large amount of heat transfer oil leaking, and the heat transfer oil has strong permeability, especially at the flange gasket. Severe, fires often occur after the leak is met with a fire source. Therefore, when installing, choose a qualified installation company. The pipe connection should be welded, and flange connection should be appropriately supplemented. Screw connection should not be used. The flange connection should be made of high-strength graphite products with oil resistance, pressure resistance and high temperature resistance. As a sealing gasket. All accessories in contact with the heat carrier shall not be made of non-ferrous metals and cast iron. The steel pipe should be 20# seamless steel pipe, and the fasteners, especially the connecting bolts on the main circuit, should be 35# steel drum. Before the boiler diesel burner is ignited, the boiler supervisory office and the installation company should conduct a pressure test on all pipes, valves, etc., until there is no leakage. The heat transfer oil should not be circulated in the system pipeline for less than 60 minutes. Confirm everything It can be ignited after it is normal. 3. Improper handling during power outage caused fire. When the heat-conducting oil boiler diesel burner is in normal use, the unit occasionally has a sudden power failure. At this time, the circulating oil pump stops working, and the coal in the furnace continues to burn, so that the boiler diesel combustion engine oil temperature continues to rise, if the oil temperature rises too fast When it comes down, the oil temperature will be locally super high and coking in a short time, causing the overheating and overheating of the pipe to cause a fire. 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 oil discharge valve of the boiler diesel burner simultaneously to The high-temperature oil is slowly put into the oil storage tank, and the cold oil in the expansion oil tank is slowly flowed into the boiler diesel burner to take away heat in time. Conditional units can be equipped with dual power sources, such as a small gasoline generator, whose circuit and circulating oil pump circuit are switched to each other, so as to prevent excessive oil temperature in a short period of time after a power failure, which may cause coking, which may lead to accidents. In addition, the furnace workers must be trained and qualified by the technical supervision department, and the 'furnace operator operation certificate' shall be issued uniformly. Only the licensed furnace operators can operate independently to ensure that abnormal situations can be eliminated in time. It is also necessary to keep the circulating oil pump and the oil storage tank clean, remove the grease and dust accumulated on the surface at any time, and prevent them from being ignited by external flying fires. Cold oil replacement after power failure of the heat transfer oil boiler diesel burner When the circulating oil pump cannot be operated due to a power failure, the heat transfer fluid temperature in the furnace coil of the heat transfer oil boiler light oil burner will rise sharply and exceed the maximum allowable temperature of the heat transfer fluid, causing the heat transfer fluid Accelerate the deterioration and coking, quickly open the cold oil replacement valve, the cold oil in the upper tank is replaced into the lower tank through the furnace, and wet coal or steam pressure is performed at the same time. This process should be completed within 5 minutes. How to effectively prevent fires from heat transfer oil boiler diesel combustion engines 1. Strengthen management and use units should record the operation of organic heat carrier furnaces in detail. Operators must be trained and qualified to work with certificates. Unlicensed personnel are strictly forbidden to operate. Boiler diesel combustion engine room. Roving inspections should also be strengthened. Focus on checking the automatic exhaust of the expansion pipe, the spillover of the heat transfer oil, and the leakage of the heat transfer oil pipeline, regularly check and analyze the physical and chemical indicators of the heat transfer oil, grasp the quality change of the heat transfer oil in time, and analyze the reasons for the change. The diesel burner of the vertical gas-fired heat-conducting oil boiler should be equipped with suitable fire extinguishing devices or fire extinguishing equipment, and special personnel should be inspected and maintained to ensure that the fire extinguishing devices or fire extinguishing equipment can be used normally. The user shall establish an emergency response plan for the organic heat carrier furnace accident according to the accident characteristics of the organic heat carrier furnace and conduct drills. Keep the circulating oil pump and the oil storage tank clean, remove the grease and dust accumulated on the surface at any time, and prevent it from being ignited by external sparks. Vertical gas-fired heat-conducting oil boiler diesel burner should be inspected according to regulations, and the problems found in the inspection should be dealt with in time. 2. Eliminate potential safety hazards to the quality of heat transfer oil. The user should regularly sample and analyze the heat transfer oil, grasp the quality change of the heat transfer oil in time, analyze the reasons for the change, and regularly add new heat transfer oil to keep the residual carbon content stable. The heat transfer oil added to the boiler diesel burner must be dehydrated in advance. During the use of heat transfer oil and other organic heat carriers, each performance index value must be controlled within a certain range, otherwise it must be updated or regenerated and cannot be used continuously. Control the temperature of the heat transfer oil. The temperature of the heat transfer oil at the outlet of the boiler diesel burner should not exceed the maximum operating temperature. The maximum film temperature of the diesel burner of the vertical gas heat transfer oil boiler (the arithmetic mean of the wall temperature and the main fluid temperature) should be lower than the allowable oil film temperature. There should always be a temperature difference between the temperature and the temperature of the main fluid of the heat transfer oil (usually around 20-30°C). The film temperature should be prevented from being too high to avoid decomposition, polymerization, coking and aging of the heat transfer oil. Control the flow rate of heat transfer oil. The flow of heat transfer oil in the hot oil furnace should be stable. The slower the flow rate, the thicker the boundary layer, and the greater the difference between the temperature of the medium and the mainstream temperature, which will cause the pipe wall to overheat and accelerate the deterioration and failure of the heat transfer oil. Therefore, the flow rate of the circulating oil pump should be strictly controlled to maintain the necessary flow rate of the heat transfer oil in the boiler diesel burner. The circulating oil pump is not allowed to stop during the operation of the thermal oil boiler diesel combustion engine, and the pump should be maintained regularly. Beware of leaks. The installation of the heating system of the hot oil furnace shall be completed by the manufacturer or designated installation unit, and the quality shall be qualified and shall comply with the regulations. It is best to use welding methods for pipe connection, with flanges as appropriate, and screw connections are not allowed. High-strength graphite products with oil resistance, pressure resistance and high temperature resistance should be used as sealing gaskets for flange connection. All accessories in contact with the heat carrier shall not be made of non-ferrous metals and cast iron. Before the ignition of the boiler diesel burner, a pressure test shall be carried out for all pipes, valves, etc., until there is no leakage. The circulation of the heat transfer oil in the system pipeline shall not be less than 60min. After confirming that everything is normal, ignition can be performed. 3. Responding to power outages In case of sudden power outages, effective safety protection measures must be taken to avoid overheating of the diesel burner of the vertical gas heat conduction oil boiler and overheating of the heating surface metal. The main measures are: open all furnace doors, quickly take out the fuel in the furnace, let a large amount of cold air enter the furnace, and quickly reduce the furnace temperature, at the same time, quickly close the main oil valve, open the oil drain valve, and slowly put the high-temperature oil into the oil storage tank. And let the cold oil in the expansion oil tank slowly flow into the boiler diesel burner to take away heat in time. It is equipped with a backup power supply or a backup oil pump driven by a gasoline engine. Once the power is cut off, it will start immediately. After the call, the high slot should be filled with heat transfer oil in time. How to strengthen the training of employees First of all, we must understand the performance of heat transfer oil. The operation and management personnel must understand the general characteristics of the heat transfer oil when using the heat transfer oil, and be aware of the matters that should be paid attention to during the use of the heat transfer oil. For example, heat transfer oil is easy to oxidize when it comes in contact with air, so corresponding measures must be taken to avoid contact between heat transfer oil and oxygen in the air or other oxidizing substances. If abnormal nitrogen seals in the high tank are found during use, they should be dealt with immediately; In addition to oxidation of heat transfer oil, special attention should be paid to the use of heat transfer oil to avoid over-temperature use, minimize excessive temperature fluctuations of the heat transfer oil, and take effective measures to avoid local high temperatures in emergencies. Second, we must understand the characteristics of the safe operation of the heat transfer oil system. Operation and management personnel should pay special attention to the changes in the temperature and pressure of the heating system when using heat transfer oil. If the temperature difference between the inlet and outlet or the outlet temperature is abnormal, the system should be checked in time, or the pressure fluctuation should be found in time to avoid accidents. occur. Regularly clean the filter device in the circulation pipeline to maintain the cleanliness of the heat transfer oil, and avoid damage to the oil or equipment by mechanical impurities and coking substances in the heat transfer oil. Pipeline inspections should be conducted regularly, and leaks should be remedied in time. In addition, it must be operated in accordance with the correct specifications. After the first start-up or new injection, it must be dehydrated and lightened, and the temperature must be raised according to the temperature-rising curve given by the factory, so as to avoid the phenomenon of fuel injection caused by excessive heating. Stop the fire when stopping, and stop the circulating pump when the oil temperature drops below 100°C. Cut off the heat source when emergency shutdown, for example, the coal-fired furnace should use wet coal to suppress the residual heat to continue heating, and then quickly open the cold oil to replace the heat transfer oil in the furnace tube to avoid local overheating of the heat transfer oil and cause accidents. During the production process, the operation management personnel must strictly implement the safety technical regulations and process regulations, and their positions must strictly follow the system operating regulations and fill in the operation records at regular intervals; they must also inspect the pipeline equipment and accessories in the system during duty hours, especially Pay attention to whether there is leakage in the connecting parts such as pipe joints, welding horns and flanges. The abnormal phenomena in the system shall be dealt with decisively and reported to the superior in time. ! If you are interested in diesel combustion engines, please contact us for a quote!