Medium test and cold circulation of heat conduction oil boiler diesel burners

The quality of the heat transfer fluid used in the heat transfer oil boiler diesel burner is qualified, which is good for the safe operation of the heat carrier boiler diesel burner have a great impact. Therefore, it is necessary to test the heat transfer fluid samples used or confirm the relevant quality of the supplier. This should be clear: (1) Whether the maximum temperature of the heat transfer fluid in the heat transfer oil boiler diesel burner is the same as the heat transfer oil burner light oil burner The heating conditions are the same. The outlet temperature of the furnace should be at least 30-40°C lower than the heat carrier, otherwise the heat carrier will quickly decompose and fail prematurely during use. (2) Sampling inspection to determine whether the external heat carrier quality, flash point, viscosity, acid value, carbon residue and water of the heat transfer oil boiler diesel burner, and the quality certificate provided by the heat carrier manufacturer are consistent, which is also for future operation. Provide basis for quality change monitoring. (3) Inject oil, use a fuel pump to inject the heat transfer fluid from the tested heat transfer oil boiler diesel burner into the furnace and expansion tank. When the heat transfer fluid is injected into the system with a fuel pump, it is necessary to check again whether the drain valve and drain valve of the furnace body, heating equipment and piping system are closed well to avoid the loss of heat transfer fluid. At the same time, open the exhaust valves on the pipes and the furnace one by one to exhaust the air until the oil flows out of the closed state. When the oil level appears on the expansion tank level gauge, stop injecting the conduction liquid, and then start the circulating pump for cold circulation. (4) The purpose of the cold circulation of the thermal oil boiler diesel combustion engine is to detect whether the entire heating system is stagnant, whether there is leakage in the equipment, pipelines, valves, etc., and whether the flow and head of the circulating pump can meet the production requirements. Due to the high viscosity of cold oil, the pressure difference between the inlet and outlet of the heat carrier furnace is relatively large, and the resistance of the piping system is relatively large. Each circulating pump should be started and tested in sequence so that the cold oil can circulate in the system for 6 to 8 hours. The heat-conducting oil furnace light oil burner circulates under cooling, and often opens the remaining air valve of the gas discharge, observes and records the pressure gauge, thermometer, ammeter display box, pay attention to recording the differential pressure pump circulating pump current, inlet and outlet, circulating pump outlet pressure, Check the inlet and outlet pressure data of the heat-conducting oil boiler diesel burner, and check whether the oil pump is running smoothly and the bearing seal is intact. (5) In the cold cycle of disassembling the heat-conducting oil boiler diesel burner and cleaning the filter, various impurities in the system and residues in the heat-conducting fluid will be filtered out before the oil pump and the cold oil cycle. After circulation, the filter should be disassembled to remove dirt from the filter and filter network. Fire prevention 1. Pipe burst fire 1. The oil quality is poor and the carbon residue index in the oil is too high. When the heat transfer oil is heated to 1000°C, it will spray oil and catch fire, or the water will be heated and vaporized to generate high pressure, which will cause an overpressure explosion of the equipment. 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 is too high and the flow rate is too low. Sometimes the engine temperature cannot meet production needs because of high oil temperature. 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. 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 pipeline 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 to install. The pipeline is connected to the welding, and the appropriate flange connection is supplemented. Do not use screw connection. The flange connection should use oil-resistant, high-pressure, high-temperature and high-strength graphite products as the seal. washer. All accessories in contact with the heat carrier must not be made of non-ferrous metals and cast iron. The steel pipe should be useless. There are no steel seamless pipes, fasteners, especially connecting bolts for the main circuit. 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 no leakage occurs. The heat transfer oil should circulate in the system pipeline for not less than 60 minutes, and ignition can only start 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, open all furnace doors to immediately eliminate the remaining coal combustion in the furnace, let a large amount of cold air enter the furnace, quickly reduce the temperature in the furnace, and eliminate the heat source; open the drain valve of the boiler diesel burner simultaneously , 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 units can be equipped with dual-circuit power supplies, such as small gasoline generators. The settings of the circuit and the circulating oil pump circuit are switched to prevent the oil temperature from being too low after a power failure, which may cause coking and cause accidents. In addition, the stoker must be trained by the technical supervision department, and all “stoker operation certificates” will be issued, and only licensed fuel dispensers are allowed to operate independently to ensure timely elimination of abnormal situations. At the same time, keep the circulating pump and the oil storage tank clean, and remove oil dirt and dust on the surface at any time to prevent external fires.
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