What should be paid attention to when using the thermal oil boiler diesel burner?

For the heat transfer oil boiler diesel burner, the heat is transmitted by the electric heating element of the heat transfer oil, and the heat transfer oil is used as the medium. A circulating pump is used to force the heat transfer oil to circulate and transfer heat. , Use one or more heating equipment, after unloading with the thermal equipment, and then pass the circulation pump, return to the heater, and then absorb the heat, the heat is used by the equipment, so as to circulate and realize the continuous heat transfer. Then we will explain the precautions when using it below. (1) The design of the full oil circulation system of the heat-conducting oil boiler diesel combustion engine should be smooth, minimizing elbows and valves. Choose a high-efficiency circulating pump. To clean the filter in time, you must ensure that the flow rate of the heat transfer oil at high temperatures is not less than 2 m/s. (2) Correctly choose the thermal oil boiler diesel burner to avoid the uneconomic phenomenon of overload operation and excessive proportion. The choice of the heating capacity of the thermal oil boiler diesel burner is not only related to the safety and service life of the thermal oil boiler diesel burner, but also affects the service life and production cost of the heat transfer oil. (3) Choosing heat transfer oil for thermal oil boiler diesel combustion engine should have good thermal stability, oxidation resistance and strong coking resistance. When choosing heat-conducting oil for boilers and diesel burners, be careful not to choose heat-conducting oil with a dark smell and color. The service life of heat transfer oil is measured by four indicators: residual carbon, acid value, flash point and viscosity. An oil test is conducted every six months to grasp the quality of heat transfer oil in operation. When a problem is found, replace the heat transfer oil of the heat transfer oil boiler diesel burner in time, find out the cause of the heat transfer oil deterioration and preventive measures as soon as possible. At the same time, do not mix heat transfer oil with different product numbers. (4) Use the thermal oil boiler diesel burner in strict accordance with the operating procedures to avoid rapid fire and temperature rise (the temperature rise rate should be controlled at 10-40℃, h), over-temperature, over-pressure, emergency stop measures should be taken quickly and decisively, Observe the oil level and temperature of the expansion tank at any time. If the heat-conducting oil boiler diesel burner is short of oil, make up water in time. Prevent air and moisture from entering the oil circulation system. The high temperature heat transfer oil will accelerate the oxidation rate after directly contacting the air (when the temperature rises by 10°C, the oxidation rate will increase by 2 times), preventing the high temperature oil from directly contacting the air. A better method is to seal the upper space of the expansion tank with nitrogen. The protective gas film layer is formed under unconditional nitrogen sealing conditions. Under normal circumstances, the heat transfer oil temperature of the high water tank shall not exceed 60℃, and the high water tank shall not be directly connected in series in the circulation system. (5) Improve the thermal efficiency of the thermal oil boiler diesel burner, and timely remove the dust and dirt on the furnace inner wall and the coil wall to ensure good heat transfer effect. At the same time, better quality coal should be used as much as possible, so that the heat generated by burning coal can be fully transferred to the hot oil in time. (6) Heat transfer oil boiler, diesel combustion engine, thermal insulation boiler, diesel combustion engine, heat transfer oil circulation pump should not be stopped when the heat transfer oil circulation pump is stopped. Wait until the furnace temperature drops to the specified range before stopping the circulating pump. Each time the furnace should start the circulating pump first. In the event of a sudden power failure or failure of the circulation system, in addition to ventilation and cooling. The heat transfer oil must also be replaced with cold heat transfer oil boiler diesel burner. Fire prevention 1. Pipe burst fire 1. The oil quality is poor and the residual carbon in the oil is too much. 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 and generate high pressure at high temperature, resulting in The equipment exploded over pressure. 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, and deposited on the tube wall to overheat. Therefore, the heat transfer oil should be sampled and analyzed regularly, and the quality changes of the oil products should be grasped and analyzed in time. 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 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 intensifies the degree of coking, fouling, and heat transfer efficiency. Circulate until the furnace tube bursts. 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 heat medium transport monitor will fall off or evaporate in a large amount when the temperature is too high, causing pipeline vibration or even damage, leading to a large amount of heat transfer oil leakage. However, heat transfer oil has a strong permeability, especially at the flange gasket, which is more 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 unit will occasionally experience a sudden power failure. At this time, the circulating oil pump stops working, and the coal in the furnace continues to burn, causing the boiler diesel combustion engine oil temperature to continue to rise. If the oil temperature rises If it drops too quickly, the oil temperature will be locally overheated and coking in a short period of time, resulting in excessively high pipe overheating temperature. 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.
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