What improper operation should be avoided during daily use of the thermal oil boiler diesel burner?

Heat-conducting oil boiler diesel burner is a type of boiler diesel burner with a higher market share. Although it is safer than traditional steam boiler diesel burner, it is It must be opened and closed strictly in accordance with the operating procedures, otherwise it will cause certain safety hazards to the boiler diesel burner. So let's briefly explain below. The first fault of the heat-conducting oil boiler diesel combustion engine is that the ignition rod does not ignite. When this fault occurs, it is usually because there are impurities or oil stains between the ignition rods. It is also possible that the distance between the ignition rods is incorrect, so we are checking the corresponding After the reason, it must be replaced and cleared in time, and the appropriate distance must be adjusted. If the line is changed, the correct replacement must be performed to ensure that the distance of the various parts of the gas heat transfer oil boiler and diesel combustion engine is appropriate. Fault 2: There are sparks but not lit. In many cases, the ventilation gap of the cyclone disc will be blocked by impurities, resulting in poor ventilation. If the distance between the tip of the ignition rod and the leading edge of the oil nozzle is incorrect, it will also cause this situation, and when the oil is too sticky Or when the filter system is blocked, the oil pump will not suck enough oil, and the oil pressure will become lower. The normal measure we take is to clean the impurities to ensure that the high-performance gas-fired heat-conducting oil boiler and diesel burner is clean. If it is not possible, newer parts can be used to ensure that the gas-fired heat-conducting oil boiler and diesel burner are working in high-quality conditions. Fault 3: Extinguish or unstable flashing situation. When the air volume of the damper of the big fire is set too large, it will cause flashing instability. If the oil viscosity is too high during the production process, it will not be prone to atomization, so we It is necessary to increase the heating temperature, and then adjust the proper distance of the gas heat conduction oil boiler diesel burner, clean or replace the problematic parts. Of course, if the heating temperature in the reserve mailbox is too high, it will also cause the steam oil pump to fail. So know how to change oil or drain water in time. Failure of the diesel burner of the heat-conducting oil boiler caused by poor operation 1. It is not difficult to imagine that the system of the light oil burner of the heat-conducting oil boiler enters water. The ingress of water into the hot oil of two or three hundred degrees will affect the normal operation; the system pressure fluctuates sharply; The circulating pump produces 'cavitation' and cannot work normally. The exhaust pipe of the high-level expansion tank is steamed, and even the oil is flushed out. This can only stop the furnace in an emergency and quickly cool the system. After finding the cause of the water ingress and taking measures After removal, the heat transfer oil in the system must be dehydrated, the hot oil circulating pump is started, and the cold furnace is ignited. After the cold furnace is ignited, the temperature is raised at a temperature rise rate of every 10°C/hour until 90～95°C. When the furnace is cooled, the viscosity of the oil is large, the flow rate in the tube on the heating surface is low, the oil film on the pipe wall is thick, and the heat transfer conditions are poor. It is easy to cause the temperature of the local oil film to be too high. The residual water and heat transfer oil in the driving system are driven away from 90 to 110 ℃. The stage of containing trace moisture. The heating rate is controlled within the range of 0～5℃/hour, and the length of this time depends on the dehydration situation. When the high-level expansion tank has a large exhaust volume at the vent pipe, there is a sound of water hammer at the bottom When the vibration of the pipeline increases and the pointer of the pressure gauge everywhere swings greatly. The temperature must be stopped to maintain a constant temperature, and if necessary, the furnace door can be opened to weaken the combustion. The length of this stage depends on the amount of residual water and the quality of the heat transfer oil. .Never blindly accelerate the speed of heating and dehydration, because once the water in the system violently evaporates and vaporizes, the volume will expand more than 1,000 times, which will not only cause 'bumping', cause the oil level to rapidly expand and spray out, and may cause the pressure components to rupture. Accident. 2. Abnormal condition of the circulating pump
a. When the current of the circulating pump of the heat-conducting oil furnace light oil burner is lower than the normal value, it indicates that the efficiency of the circulating pump has decreased, and the flow rate has decreased. It may be due to fouling and blockage of the heating pipeline. Pre-cleaning.
b. If the circulating pump pressure remains unchanged, the current increases and the flow rate decreases, the heat transfer fluid is deteriorated and the viscosity increases. It should be replaced or regenerated in time. If the newly heated transfer fluid contains water or decomposed gas in the system If it is not eliminated, the vent valve should be opened immediately to discharge the gas.
c. The current of the circulating pump decreases, and the outlet pump pressure returns to zero, indicating that the pump is idling and does not supply oil. It may be that the oil is vaporized. Find out the cause of vaporization and take measures; If the filter is blocked and the circulating pump is evacuated, the bypass should be opened to clean the filter immediately; if the newly added heating transfer fluid contains water or the water-decomposed gas is not eliminated in the system, the vent valve should be opened immediately to exhaust. 3. Liquid-phase heat transfer oil The outlet temperature of the light oil burner of the furnace is low, the heat supply is insufficient, and the exhaust gas temperature exceeds 300 ℃, the main problem is ash accumulation, so soot should be blown in time. If the exhaust temperature is low, the main problem is combustion, mainly induced air Insufficient. Although the furnace is under positive pressure, the blast volume is not large, the furnace temperature is low, and the combustion intensity is not enough. Check whether the water seal of the slag machine at the back of the furnace, the dust outlet of the dust collector, etc. are well closed, and whether there is a large amount of cold air leakage 4. When the pressure difference between the front and rear of the filter increases, and the pressure at the pump inlet drops, the filter may be blocked. The bypass should be opened and the filter should be disassembled and cleaned. 5. Common faults and treatment of the diesel burner of the chain grate thermal oil boiler a. The grate stops rotating, it may be that the chain is too loose, the mesh is not good with the sprocket, or the sprocket is severely worn , Poor connection with the chain; readjust the adjustment screws on both sides and tighten the grate. If it still does not work, you need to replace the sprocket.
b. The grate is stuck. The reason is often that the grate piece is broken or pin The grate slices loosen after the spoiler falls off; there are metal inclusions in the coal to jam the grate; the grate slices are arched; the tip of the slag stopper (eagle iron) sinks to block the grate. Treatment method: reverse the grate with a wrench Remove the debris, replace the broken grate piece, and then start again. If it gets stuck after starting, stop the rotation and check the cause before solving it. If the eagle iron sinks, you can pull the fire door on both sides with an iron hook. 6. Heat conduction The reason for the oil spill in the expansion tank of the oil burner light oil burner: First, when the heat transfer oil circulating in the heating device system exceeds the pressure difference between it and the high tank, the oil and gas mixture will emerge from the high tank, causing oil spill ; The second is that the oil temperature in the system changes suddenly, causing the composition of the oil to change, the volume of the oil expands, the oil pressure rises sharply, and the entire system is unbalanced, causing oil spills. Operating rules for heat conduction oil burner light oil burner 1. Preparation before start-up 1. Check all the equipment and accessories installed to check whether they meet the design requirements, valves, filters, pumps, and pipelines are installed correctly. 2. Check whether the electrical control cabinet is wired in accordance with the electrical schematic diagram, whether the automatic control and safety alarm system is in good condition, and whether the rotation of the circulating pump is correct. 3. Check whether the water, electricity, steam, gas, etc. meet the requirements; whether the safety and fire-fighting facilities are complete and easy to use, and whether the storage location is proper; whether there are flammable and explosive materials on the site, and whether there are debris accumulated around. 2. Initial start-up and commissioning 1. Oil filling: After the system has the oil filling conditions, turn on the oil injection pump and inject the heat transfer oil into the system until 1/3 of the liquid level appears in the high tank. 2. Cold transportation: Turn on the circulating pump and check whether the direction, pressure and liquid level of the oil pump are normal. Run it for more than 2 hours under cold oil until the air in the system is completely removed. 3. Oven: Before using the boiler diesel burner for the first time, the oven must be dried. For coal-fired thermal oil furnace and light oil burner, it is required to use a wood-fired oven, and the temperature rise rate should be controlled at 10℃/h, and should not exceed 100℃. The oven time depends on the oven type. 4. Dehydration: The system that uses or adds new oil for the first time needs to be dehydrated first. Open the valve of the dehydration line (auxiliary exhaust pipe) at the start of the system, and raise the temperature to within the range of 100-110℃ to start dehydration. At this time, the pressure of the circulating pump will fluctuate greatly, and there will be steam at the exhaust pipe port on the top of the high tank. After the body is discharged, keep the constant temperature until the pressure is stable, then slowly increase the temperature by 3-5°C to continue dehydration... Repeat the above operation until the temperature reaches 150°C and the pressure stabilizes, the dehydration is completed. The dehydration time depends on the system conditions, do not try to speed up the dehydration process, so as not to cause oil injection in the high tank. After dehydration, the dehydration valve must be closed in time, otherwise the heat transfer oil will quickly age until it is scrapped. The ignition and temperature rise of the organic heat carrier furnace is a more dangerous stage in the operation and requires special care. The heating process must follow the principle of 'one slow and two stops'; one slow means slow heating speed, and second stop means 95°~110°C And the two temperature ranges of 210°~230°C should stop heating up and maintain this temperature for a period of time. a) Heating curve After the heat carrier furnace is ignited, the heating process and heating speed are executed according to the heating curve. a) After the cold furnace is ignited, control the heating rate to 10°C/hour until 90~95°C. Because of the high viscosity of the oil when the furnace is cold, the flow velocity in the heating surface tube is low, the oil film on the tube wall is thick, and the heat transfer conditions are poor. If the heating speed is too fast, the local oil film temperature is likely to be too high. b) The range of 95~110℃ is the stage of driving away the residual moisture in the system and the trace moisture contained in the heat transfer fluid. The heating rate is controlled in the range of 0~5℃/hour, depending on the dehydration situation. When the exhaust steam at the vent pipe of the expander is large, there is a sound of water hammering at the bottom, the pipe vibration accelerates, and the pointer of the pressure gauge everywhere swings greatly, the temperature must be stopped to maintain a constant temperature, and the furnace door can be opened to weaken the combustion if necessary . The length of this stage depends on the amount of residual water in the system and the quality of the heat transfer fluid. The shortest time can be more than ten hours, and the longest time can reach several days. Repeated several times between 95~110℃. Drain water. It is not possible to blindly speed up the heating and dehydration process, because once the water in the system evaporates and vaporizes, the volume will expand rapidly, which may not only cause 'bumping' and cause the oil level to expand rapidly and spray out a large amount, but also may cause the pressure of the entire system to rise sharply, leading to The pressure component ruptured, causing a serious accident. c) When the noise in the furnace and in the pipeline becomes smaller and the circulating oil pump no longer empties (the outlet pressure of the pump drops below 0.1MPa, there is a heavy panting sound), the temperature will rise again at a rate of 5°C/hour, but it should not exceed 120°C, until no more vapor is discharged from the vent pipe. At this time, if the pressure gauge pointer stops fluctuating, the dehydration is qualified. d) After the dehydration process is completed, continue to raise the temperature at a rate of 30°C/hour, but you should still be aware that residual water may evaporate and stop the temperature at any time. When the temperature reaches 210~230℃, it should stop. At this time, it is mainly to remove the hydrocarbon components in the heat transfer fluid. The presence of hydrocarbon components in the heat transfer fluid reduces the flash point, and once it leaks, the possibility of causing deflagration increases. In the heat carrier furnace for the liquid-phase furnace, the hydrocarbon component exists in the gas phase, which will cause 'gas lock', which will make the pressure of the circulating pump unstable, and the flow will not drop or even be interrupted. The analysis process of the light-removing group depends on the different brands and different qualities of the heat transfer fluid. When there is no gas discharged from the vent pipe, the circulating pump pressure is stable, that is, the temperature can continue to rise at a rate of 0~10℃/hour. e) From 210°C to the working temperature of the heat transfer fluid, the temperature rises at a rate of 40°C/hour after the de-lightening is completed. At this time, the instructions of each detection and control instrument should be fully observed to see if the action is sensitive and accurate. Whether the auxiliary equipment and auxiliary equipment work normally, check whether the boiler diesel burner and heating system work normally and whether they can meet the production needs. If the heat supply fails to meet the design requirements, the heating should be suspended, the cause should be found, and the temperature should be raised again after the solution is resolved. 2) Precautions during ignition temperature rise a) The ignition temperature rise process should be carried out strictly in accordance with the temperature rise curve of the 'temperature rise curve'. b) When the temperature of the heat transfer fluid rises above 200°C, a comprehensive inspection of the equipment and the entire system should be carried out, and all bolt connections should be thermally tightened once to eliminate the leakage caused by uneven thermal expansion. c) Pay attention to the expansion of the heat transfer fluid. If the liquid level of the expander is too high, the drain pipe should be opened and the heat transfer fluid should be put into the oil storage tank to avoid a large amount of heat transfer fluid overflowing from the expander and cause accidents. d) For cold furnace ignition, the circulation pump must be turned on before ignition. In cold areas, the heat transfer fluid should be heated to about 30℃ with steam before ignition, and then the circulation pump can be started. e) The moisture removed during the ignition and heating process of the liquid phase furnace enters the expander in the form of water vapor through the expansion tube, and part of it is discharged from the exhaust tube as gas, and the other part is condensed into moisture and sinks into the bottom of the expander. To prevent this water from entering the circulatory system again, open the drain pipe at the bottom of the expander regularly to release the condensed water during the heating process. 3. Normal stop After receiving the stop instruction, the hot oil stove starts to cool down at a rate of 2°C/min. When the open flame cannot be maintained, the flame is turned off or the ash is grilled, and the flue baffle and vents are opened. When the temperature of the heat transfer oil is low After 100℃, the circulation pump can be stopped. Fourth, matters needing attention 1. The temperature of the heat transfer oil must be strictly controlled within the allowable working temperature range. 2. The oil level in the expansion tank should always be kept above 1/3. The temperature of the heat transfer oil in the expansion tank should be checked regularly and must be controlled below 70°C. 3. The heating speed should not be too fast. The temperature difference between the inlet and outlet of the boiler diesel burner is ≯30℃. 4. Ensure that the heat transfer oil circulates well, the filter should be cleaned regularly, and the lubrication points of the machine, pump and other machinery should be filled and maintained in accordance with the regulations. 5. When ignition, the circulation pump should be turned on first, and the temperature should be increased after the pressure is stable; when the furnace is shut down, it is generally required to stop the circulation pump after the temperature of the heat transfer oil drops below 100°C.


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