Will the diesel burner of thermal oil boiler explode?

　　The thermal oil boiler diesel burner is the most popular type of boiler diesel burner in the market nowadays, because of its environmental protection and high efficiency The characteristics have made it a great development in all walks of life. However, in recent years, there have been constant reports of incidents of heat-conducting oil boiler diesel burners. So how should we control the use of heat-conducting oil boiler diesel burners? Reasons that easily cause the explosion of the thermal oil boiler diesel combustion engine 1. Defects cause explosions Defects to cause explosions means that the pressure of the boiler diesel combustion engine does not exceed the rated pressure, but the main pressure-bearing parts of the boiler diesel combustion engine crack and severely deform , Corrosion, organizational changes, etc., causing the main pressure-bearing parts to lose the load-bearing capacity and suddenly burst and explode in a large area. To prevent such explosions, in addition to strengthening the quality control and safety supervision of the design, manufacturing, installation, and operation of the boiler diesel burner, the inspection of the boiler diesel burner should also be strengthened, and the defects of the boiler diesel burner should be dealt with in time to avoid the boiler diesel burning. The main pressure-bearing parts of the engine are running with defects. 2. The large parts of the diesel combustion engine that contain more water and water vapor in the steam explosion heat-conducting oil boiler, such as the drum and the water wall header, are in normal operation or in water, When the two phases of steam coexist in a saturated state, or full of saturated water, the pressure in the container is equal to or close to the working pressure of the boiler diesel burner, and the water temperature is the saturation temperature corresponding to the pressure. Once the container ruptures, the pressure on the liquid surface in the container drops to atmospheric pressure instantly, and the saturation temperature of water corresponding to the atmospheric pressure is 100°C. The saturated water above 100℃ under the original working pressure becomes extremely unstable and hard to exist under atmospheric pressure. A part of it is instantaneously vaporized, and the volume suddenly expands many times, forming in the space around the container. explosion. 3. Overpressure explosion means that due to incomplete, damaged, or incorrectly installed safety valves and pressure gauges, operators leave their posts without authorization or give up monitoring responsibilities, close or close down the steam outlet, and change the diesel burner of life boilers without pressure bearing capacity. Pressure-bearing steam boiler diesel burners and other reasons caused the main pressure-bearing parts of boiler diesel burners, heads, tube sheets, furnace linings, etc., to bear pressure exceeding their carrying capacity, causing the boiler diesel burner to explode. The main measure to prevent such explosions is to strengthen operation management.　　4. Severe water shortage leads to an explosion 　　 The main pressure-bearing parts of the boiler diesel burner, such as the drum, the head, the tube sheet, and the furnace, are directly heated by the flame. Once the boiler diesel combustion engine is seriously short of water, the above-mentioned main pressure parts cannot be cooled normally, or even burned, and the metal temperature rises sharply or even burns red. In such a water shortage situation, it is strictly forbidden to add water, and the furnace should be shut down immediately. If water is supplied to the diesel burner of a boiler which is severely short of water, it often leads to an explosion accident. Diesel burners of boilers that have been short of water for a long time will also explode.　　The factors to be considered when selecting and using the thermal oil boiler diesel burner　　1. The design of the entire oil circulation system of the thermal oil boiler diesel burner should be smooth. Minimize elbows and valves. Use high-efficiency circulating pumps. To clean the filter in time, it is necessary to ensure that the flow rate of the heat transfer oil at high temperature is not less than 2 m/s.　　2. Correctly select the heating furnace (generally choose Ⅲ according to 1.5 times of the nominal capacity) to avoid the phenomenon of overload operation and excessive proportion. Whether the heating capacity of the heating furnace is selected reasonably or not is not only related to the safety and life of the heating furnace, but also affects the service life and production cost of the heat transfer oil.　　3. Use heat transfer oil with good thermal stability, oxidation resistance and strong coking resistance. The service life of heat transfer oil is measured by four indicators: residual carbon, acid value, flash point and viscosity. Do a good job of oil testing every six months to master the quality of the heat transfer oil in operation. If the problem is found, replace the heat-conducting oil in time, and find out the cause of the premature deterioration of the heat-conducting oil and preventive measures. At the same time, it is necessary to strictly ensure that heat transfer oils of different product numbers are not mixed. 4. Use the hot oil boiler diesel burner in strict accordance with the operating procedures to avoid sudden fire heating (the heating rate should be controlled at 10-40℃, h), over-temperature, over-pressure, and emergency shutdown measures should be taken quickly, decisively, and at any time Observe the oil level and temperature of the expansion tank. If the oil is short, it should be refilled in time. Prevent air and moisture from entering the oil circulation system. Because the high-temperature heat transfer oil directly contacts the air, it will accelerate the oxidation rate (the oxidation rate increases by 2 times when the temperature increases by l0℃), to prevent the high-temperature oil from directly contacting the air. A better method is to seal the upper space of the expansion tank with nitrogen to form a protective gas film layer, and under the condition of unconditional nitrogen sealing. Generally, the temperature of the heat transfer oil in the upper tank should not exceed 60℃, and the upper tank should not be directly connected in series in the circulation system. 5. Improve the thermal efficiency of the heat-conducting oil boiler light oil burner hot oil boiler diesel burner, and timely remove the ash on the inner wall of the furnace and the coiled tube wall to ensure a good heat transfer effect. At the same time, use better quality Burning coal, so that the heat generated by burning coal can be transferred to the heat transfer oil in a timely and comprehensive manner. 6. The heat transfer oil circulating pump must not be stopped when the boiler diesel burner is warm. When the furnace is shut down, the circulating pump must be shut down after the furnace temperature drops to the specified range. The circulation pump should be turned on each time the furnace is opened. In case of sudden power failure or failure of the circulation system, in addition to ventilation and cooling. It must be replaced with cold heat transfer oil. 7. Regularly clean the heat-conducting oil pipeline to reduce the impact of the attachments produced by the heat-conducting oil boiler diesel burner at high temperature on the quality of the heat-conducting oil. Common cleaning methods include mechanical cleaning, steam cleaning, high-pressure water cleaning and chemical cleaning. . Overpressure phenomenon of heat-conducting oil boiler diesel burner 1. Overpressure of heat-conducting oil boiler diesel burner (1) The air pressure rises sharply, exceeding the allowable working pressure, and the pressure gauge pointer exceeds 'The pressure is still rising after the red line safety valve is activated. 　　( 2) An overpressure alarm signal is issued, and the overpressure interlock protection device operates to stop the air supply, coal feeding and induced air supply of the boiler diesel burner. 　　(3) The steam temperature rises and the steam flow decreases.　　 2. The boiler diesel burner is overpressured (1) The steam user suddenly stopped using steam, causing the steam pressure to rise sharply.　　(2) The furnace staff did not monitor the pressure gauge and did not reduce the combustion accordingly when the load decreased.　　(3) Safety valve failed, valve core and valve The seat is stuck and cannot be opened, the safety valve inlet is connected with a blind plate, and the safety valve exhaust capacity is insufficient.　　(4) The pressure gauge tube is blocked or frozen, the pressure gauge fails after the calibration period, the pressure gauge is damaged, and the pointer indicates the pressure is incorrect , Does not reflect the true pressure of the boiler diesel burner. 　　(5) The overpressure alarm fails, and the overpressure interlock protection device fails.　　(6) For the boiler diesel burner used for pressure reduction after inspection, if the safety valve diameter is not changed accordingly ( When the boiler diesel burner is used to reduce the pressure, the safety valve diameter should be increased), so that the safety valve's exhaust steam capacity is insufficient, and the steam pressure cannot be controlled and overpressure. 　　 3. Treatment of the overpressure of the boiler diesel burner (1) Rapid To weaken the combustion, manually open the safety valve or the bleed valve.　　(2) Increase the water supply and strengthen the blowdown in the lower drum (at this time, keep the boiler diesel burner at the normal water level) to reduce the boiler water temperature, thereby reducing the boiler diesel combustion Steam drum pressure.　　(3) If the safety valve fails or all the pressure gauges are damaged, the boiler should be stopped urgently, and the pressure should be increased after the safety valve and pressure gauge are repaired.　　(4) The boiler diesel combustion engine has overpressure and endangers safety During operation, pressure reduction measures should be taken, but it is strictly prohibited to reduce the pressure too fast.　　(5) After the severe overpressure of the boiler diesel combustion engine is eliminated, the boiler must be shut down to conduct internal and external inspections on the boiler diesel combustion engine to eliminate the overpressure caused Deformation, leakage, etc., and repair unqualified safety accessories. 　　Daily maintenance of heat transfer oil boiler diesel burner 1. Maintenance of the heating surface of the boiler diesel burner body 1. The coal-fired heat transfer oil burner light oil burner body is heated Maintenance methods that are not used for a long time: There are two kinds of dry method and wet method. If the furnace is stopped for more than one month, the dry maintenance method should be used, and the wet maintenance method can be used for the furnace to be stopped for less than one month. 　　 (1) Dry maintenance method: boiler diesel combustion After the machine stops, put the pot water to remove the internal dirt thoroughly and rinse it. Dry it on a low fire in the furnace (be careful not to use a high fire), and then install the 10-30 mm block quicklime in separate trays and place them in In the drum, the quicklime should not be in contact with the metal. The weight of the quicklime should be calculated based on the drum volume 8kg per cubic meter, and then all manholes, hand holes, and pipeline valves should be closed. Check every three months, such as crushed quicklime into Powdery, it needs to be replaced immediately. When the boiler diesel burner is running again, the quicklime and the pan take out. (2) Wet maintenance method: After the heat-conducting oil furnace light oil burner is shut down, the furnace water is cooled to below 70 ℃, the furnace water is drained, the internal dirt is completely removed, flushed, all manholes, hand holes, pipeline valves It is tightly closed, and is completely isolated from the running boiler diesel burner with a blind plate. Then re-inject the treated soft water to the lowest safe water level of the boiler diesel burner, and then inject the prepared alkaline solution into the boiler diesel burner. Its composition is: sodium hydroxide (caustic soda), 8-10kg per ton of boiler water If you choose sodium carbonate (soda ash), add 20kg per ton of boiler water, or add 20kg per ton of boiler water. After all the alkaline solution is added, soft water is injected into the boiler diesel burner until the water emerges from the highest part of the boiler diesel burner. After closing the water supply valve, pay attention to mixing the alkaline solution in the boiler diesel burner evenly. During the maintenance period, the furnace should be slightly fired regularly and the water should be circulated regularly to make the concentration of the alkaline solution consistent. Take an alkaline solution for testing every five days. If the alkalinity is less than 5-12mmol/1, add a solution. Do not use wet maintenance in cold climates to prevent the boiler water from freezing and damaging the diesel burner of the boiler.　　2. The maintenance of the burner of the oil-fired gas stove　　1. Clean the oil filter regularly.　　2. Keep the photosensitive electric eye clean.　　 3. Water should be drained at regular intervals to drain the water and dirt accumulated on the bottom of the fuel tank.　　4. Clean the inside of the burner at regular intervals.　　5. The temperature near the burner should not be too high, otherwise it will affect the normal operation or cause damage to the burner parts, especially the damage to the control box.　　 6. The vicinity of the burner should be kept clean, and no flammable debris should be placed.　　 7. Unstable voltage will damage some components of the burner.　　 8. Avoid the burner from being splashed with water.　　3. Maintenance of other auxiliary equipment of heat-conducting oil furnace and light oil burner equipment　　1. Clean the filter 1-3 in the oil (gas) path monthly.　　2. Clean the furnace, flue pipe and flue 1-2 times a year.　　 3. Regularly lubricate the motor and water pump bearings.　　4. Regularly tighten the flue and machine bolts. 4. Inspection of Boiler Diesel Combustor 1. According to the 'Steam (Hot Water) Boiler Diesel Combustor Safety Technical Supervision Regulations', if any of the following conditions exists, the boiler diesel combustor shall be inspected internally and externally. hydrostatictest. (1) After new installation, modification and relocation. (2) When the operation has been stopped for more than one year and the operation needs to be resumed. (3) After major repair of pressure components. (4) According to the operating conditions of the boiler diesel combustion engine, when there is doubt about the equipment status, an inspection must be carried out.　　 2. Before the inspection, the heat-conducting oil burner and light oil burner should be completely shut down to completely remove the scale and soot. When necessary, the outer packaging and insulation materials of the furnace wall must be removed. The key points of the internal inspection are as follows: (1) The defective parts of the last inspection. (2) The internal and external surfaces of the pressure components of the boiler diesel burner, especially the openings and welds, should be inspected for cracks, cracks and corrosion. (3) Whether the tube wall is worn or corroded. (4) Whether there are cracks, fractures and corrosions in the bracing of the boiler diesel combustion engine and the joints of the pulled components. (5) Whether the pressure components are dented, bent, bulged or overheated. (6) Whether there is corrosion at the contact between the drum (drum) and the brick lining. (7) Whether there is scale or slag on the water side of the pressure component. (8) Whether there are corrosion or cracks at the interface between the inlet pipe and the sewage pipe and the drum (shell), and whether the connection part of the sewage valve and the sewage pipe is firm.　　3. The focus of the external inspection of the heat-conducting oil furnace light oil burner equipment is: (1) Whether the various systems in the boiler diesel combustion engine room are complete, and whether the boiler workers and water quality laboratory personnel are specially certified. (2) Whether the safety passage around the boiler diesel combustion engine is unblocked, and whether the pressure components, pipes and valves are deformed or leaked in the boiler diesel combustion engine room. (3) Whether the three major safety accessories are sensitive and reliable, whether the connection channel between the water level gauge, safety valve, pressure gauge, etc. and the boiler diesel burner body is blocked. (4) Whether the actions of various safety protection devices are sensitive and reliable. (5) Whether the auxiliary equipment of the boiler diesel combustion engine is operating normally. (6) Whether the water treatment equipment of the boiler diesel combustion engine is operating normally, and whether the water quality test indicators meet the standard requirements.　　4. After the inspection is completed, a hydraulic test shall be carried out according to the requirements of this manual. ! If you are interested in diesel combustion engines, please contact us for a quote!