Working principle of heat-conducting oil boiler diesel burner

The thermal oil boiler diesel burner can generally be pided into electric heating, gas heating and mineral fuel heating, but they are all The medium that uses heat transfer oil for heat transfer is the heat medium. The hot oil circulating pump is used for liquid phase circulation, so that heat energy is transferred to the heat-consuming equipment, and high-temperature work can be carried out at lower pressure, so it has better safety and environmental protection. General classification of heat-conducting oil boiler diesel burner: 1. According to the flow of flue gas in the boiler diesel burner: water tube boiler diesel burner, shell boiler diesel burner (fire tube boiler diesel burner), water and fire tube combination Boiler diesel burner 2. According to the way the drum is placed: vertical boiler diesel burner, horizontal boiler diesel burner 3. According to purpose: domestic boiler diesel burner, industrial boiler diesel burner, power station boiler diesel burner 4. Divided by medium: steam boiler diesel burner, hot water boiler diesel burner, soda-water boiler diesel burner, organic heat carrier boiler diesel burner 5. According to installation method: quick-installed boiler diesel burner, assembled boiler Diesel burner, bulk boiler diesel burner 6. According to fuel: coal-fired boiler diesel burner, oil-fired boiler diesel burner, gas boiler diesel burner, waste heat boiler diesel burner, electric heating boiler diesel burner, biomass boiler Diesel burner 7. According to water circulation: natural circulation, forced circulation, mixed circulation 8. According to pressure: atmospheric boiler diesel burner, low pressure boiler diesel burner, medium pressure boiler diesel burner, high pressure boiler diesel burner, super High-pressure boiler diesel burner 9. According to the number of boiler diesel burners: single-drum boiler diesel burner, double-drum boiler diesel burner 10, according to combustion in the internal or external part of the boiler diesel burner: internal combustion boiler diesel combustion Engine, external combustion boiler diesel burner 11, according to the working fluid in the evaporation system can be pided into natural circulation boiler diesel burner, forced circulation boiler diesel burner, once-through boiler diesel burner, etc. 12. Classified by manufacturing level: Class A, Class B, Class C, Class D, Class E (according to the pressure of the manufacturing boiler diesel burner) The principle of the heat conduction oil furnace light oil burner: coal, heavy oil, light oil , Combustible gas and other combustible materials as fuel, heat transfer oil as heat carrier. Use the circulating oil pump to force the liquid phase to circulate, transfer the heat energy to the heating equipment, and then return to the reheated DC special industrial furnace. The heat transfer oil, also known as the organic heat carrier or heat medium oil, is used as an intermediate heat transfer medium in industrial heat exchange The application in the process has a history of more than 50 years. The organic heat carrier furnace is a new type of special boiler diesel burner using heat transfer fluid as the heating medium. It has low pressure and high temperature working characteristics. With the development of industrial production and the progress of science and technology, organic heat carrier furnaces have been continuously developed and applied. Although the working pressure of the organic heat carrier furnace is relatively low, the temperature of the heat transfer liquid in the furnace is high, and most of them have the characteristics of flammability and explosion. Once the leakage occurs during operation, it will cause fires, explosions and other accidents, and even cause casualties. property loss. Therefore, the safe operation and management of organic heat carrier furnaces must be highly valued. Electric heating heat conduction oil furnace light oil burner is a new type, safe, efficient and energy-saving, low pressure (under normal pressure or lower pressure) and can provide high temperature heat energy special industrial furnace, using heat conduction oil as the heat carrier, through the hot oil pump The heat carrier circulates and transfers heat to the heat-using equipment. The electric heating heat transfer oil system is composed of an explosion-proof electric heater, an organic heat carrier furnace, a heat exchanger (if any), an on-site explosion-proof operation box, a hot oil pump, an expansion tank, etc., combined into a skid. The user only needs to connect to the power supply and the medium. The import and export pipelines and some electrical interfaces can be used. For the electric heating oil furnace, the heat is generated and transmitted by the electric heating element immersed in the heat transfer oil. Using the heat transfer oil as the medium, the circulating pump is used to force the heat transfer oil to circulate in the liquid phase, and the heat is transferred to one or more heat After the equipment is unloaded by the heat equipment, it passes through the circulating pump again, returns to the heater, and then absorbs heat and transfers it to the heat equipment. It repeats this cycle to achieve continuous heat transfer, so that the temperature of the heated object rises, and the heating process is reached. Claim. Application: Widely used in petroleum, chemical, pharmaceutical, textile printing and dyeing, light industry, building materials and other industrial fields. The functional characteristics of the thermal oil boiler diesel burner: 1. It has the characteristics of low pressure, high temperature, safety, high efficiency and energy saving. 2. With complete operation control and safety monitoring devices, it can precisely control the working temperature. 3. Reasonable structure, complete supporting facilities, short installation period, convenient operation and maintenance, and convenient layout of boiler diesel burner. 4. Because the electric heating organic heat carrier furnace adopts advanced explosion-proof structure, it can be applied to the explosion-proof zone II of the factory, and the explosion-proof grade can reach C level. Operating procedures for heat conduction oil furnace light oil burner: Check before starting: 1. Whether the heating furnace and its surroundings are clean and free of debris, check whether the furnace body, burner, controller, fire hole, smoke (chimney) duct, etc. are normal 2. Reverse the process equipment and process, check whether the oil level of the expansion tank is above the 1/4-1/2 level, and whether the thermometer, pressure gauge, etc. are normal; 3. Turn on the heating furnace control cabinet power supply and check whether the voltage If it is normal, check whether the indicator light and each display instrument are normal; 4. Adjust the gas main pressure reducing valve and secondary pressure reducing valve to control the pressure to 0.005 MPa. Start: 1. Start the heat transfer oil circulating pump (transport one, prepare one, refer to the water pump operation rules), and circulate normally for about 0.5 hours after starting the pump to stabilize the pressure; 2. Press the burner start button and observe whether the furnace flame is burning normally. If there is no ignition, the burner should be started again after troubleshooting. Boiler shutdown operation: Normal shutdown of the boiler: 1. Gradually reduce the temperature, turn off the burner, and stop burning; 2. When the temperature of the hot oil drops below 70°C, stop the operation of the hot oil circulation pump (refer to the water pump operation rules); 3. Turn off the main power supply and make a record of shifts. Emergency shutdown of the furnace: If the furnace is shut down due to an emergency, the burner should be quickly turned off, and the burner should be moved away along the burner hinge axis, so that natural ventilation is formed between the furnace and the chimney, and the heat storage in the furnace is dissipated. So that the heat transfer oil is naturally cooled to prevent overheating. The cause of fire and explosion of the heat-conducting oil boiler diesel combustion engine The heat-conducting oil is a combustible organic matter. When the heating device system is running, there are often fires, explosions, overpressure explosions, bulging pipes, leaks and other accidents. The reasons for these accidents are as follows: 　1. The water and volatiles were not removed in time when adding new heat transfer oil. 2. Too fast heating causes the oil volume to expand rapidly or the liquid level is too high. 3. Sudden power failure, the heat transfer oil stagnates in the furnace tube, causing overheating. 4. The temperature in the high-position tank is too high, and the heat-conducting oil is exposed to oxygen through the exhaust pipe to oxidize and cause spontaneous combustion. 5. Leakage occurs in the joints of valves, flanges, etc. or the seals in the system, and the open flame is not solved in time. 6. If the heat transfer oil leaks into the heated material and mixes with the oxidant or active catalyst in the material, it will burn violently. 7. The heat-conducting oil in the heating device system runs due to over-temperature and over-pressure, and coking in the pipeline causes the furnace tube to rupture, and the leaked heat-conducting oil enters the open flame. 8. The leakage of heat-conducting oil into the insulation layer of the pipeline has not been discovered in time, and the accumulated oil is too much and gradually oxidizes to produce low spontaneous combustion components, which can lead to spontaneous combustion. 9. If moisture enters the gas-phase heat transfer oil system, its volume will expand rapidly and cause an explosion; or the leaked heat transfer oil in the system will form an aerosol and reach a certain concentration, which will also cause fire or explosion. Precautions: 1. During the patrol inspection, pay attention to check whether there is leakage around the light oil burner of the heat transfer oil furnace. There should be sufficient oil and electrical fire fighting equipment nearby, and water is not allowed as a fire extinguishing agent; 2. The maximum working temperature should not exceed 300℃, and the heat transfer oil should circulate well in the high temperature state; 3. The expansion tank must not participate in the system pressure test, and the overflow pipe and vent pipe of the expansion tank must not be equipped with valves; during normal operation, the expansion tank The heat transfer oil should be about 1/2; 4. When the furnace is shut down, the operation of the heat oil circulation pump must be stopped until the temperature of the heat transfer oil drops below 70°C; 5. If the burner does not ignite normally, close the gas valve immediately and check After troubleshooting, start the burner and re-ignite. The safe operating procedures of coal-fired liquid organic heat carrier furnace are now introduced as follows: Ignition temperature rise: prerequisites before the thermal oil boiler diesel burner is put into operation 1. Go through the organic heat carrier furnace registration procedures and obtain the use registration certificate. After the new furnace is installed, it should be inspected and accepted by the local boiler diesel burner inspection office. The user should fill in the 'Boiler Diesel Burner Registration Card' and go to the local quality and technical supervision bureau to complete the registration procedures and obtain the registration for use. certificate. Unlicensed furnaces shall not be put into operation. 2. Stoker personnel shall be assessed by the quality and technical supervision department and hold the 'Heat Carrier Furnace Stoker Operation Certificate'. In addition to meeting the requirements of industrial boiler diesel burners, the stoker should also be trained in heat carrier furnace expertise. 3. The user unit should have a sound management system and safe operating procedures. Preparations before ignition: inspection and preparation of the inside and outside of the organic heating furnace, including: the residual water inside the organic heating furnace has been drained and blown dry; the debris in the furnace is cleaned; all inspection holes, manholes, etc. Airtight, and the use of fillers meets the requirements of the heat carrier furnace medium. Inspection of safety accessories and protection devices: 1. The needle valve or stop valve at the front end of the pressure gauge elbow is fully open. The pressure gauge accuracy, range, and dial diameter meet the requirements, and the pointer returns to zero when there is no pressure. 2. The drain pipe valve of the level gauge is closed, and the drain pipe has been correctly connected to the storage tank. 3. The thermometer and automatic recording instrument have been checked and qualified; the over-temperature and over-pressure alarm and automatic interlocking protection device have been put into use, and there is no abnormality in the electrical control contacts. 4. Check the combustion ventilation equipment and there is no abnormality. Medium test and cold circulation: the quality of the heat transfer fluid used in the organic heat transfer furnace is of high quality, which is of great importance to the safe operation of the heat transfer fluid boiler diesel burner. Therefore, the heat transfer fluid used should be sampled and tested first or there is a relevant quality certificate from the supplier. It should be clear: 1. Whether the maximum use temperature of the heat transfer fluid is consistent with the heating conditions of the organic heat carrier furnace. The outlet temperature of the furnace should be at least 30~40℃ lower than the allowable use temperature of the heat transfer fluid, otherwise the heat transfer fluid will quickly decompose and deteriorate during use, leading to premature failure. 2. Sampling tests to determine the appearance quality, flash point, viscosity, acid value, residual carbon and moisture of the heat transfer fluid, and whether it is consistent with the quality certificate provided by the heat transfer fluid manufacturer, and it also provides a basis for monitoring the quality of the medium in the future. . Oil filling: Use a fuel pump to inject the heat transfer fluid into the furnace and expander with the heat transfer fluid that has passed the test. When the refueling pump injects heat transfer fluid into the system, check whether the drain valve and drain valve of the furnace body, heating equipment, and piping system are closed to avoid the loss of heat transfer fluid. At the same time, open the exhaust valves on the pipes and the furnace body one by one to remove air and close them when oil flows out. When the oil level appears on the expander level gauge, stop the injection of heat transfer fluid, and then start the circulating pump to perform cold circulation. Cold circulation: The purpose of the cold circulation is to test whether the entire heating system is blocked, whether there is any leakage in equipment, pipelines, valves, etc., and whether the flow and lift of the circulating pump can meet the production requirements. Because of the high viscosity of the cold oil, the pressure difference between the inlet and outlet of the heat carrier furnace is relatively large, and the flow resistance of the pipeline system is also large. Each circulating pump should be started and tested in turn to allow the cold oil to circulate in the system for 6 to 8 hours. In the cold cycle, it is necessary to frequently open the bleed valve to discharge the remaining air, observe and record the display conditions of the pressure gauge, thermometer, ammeter, etc., and pay attention to recording the circulation pump current, inlet and outlet pressure difference, circulation pump outlet pressure, and organic heat. Carrier furnace inlet and outlet pressure difference and other data, and check whether the oil pump runs smoothly and whether the bearing seal is good. Disassemble and clean the filter in the cold cycle, various impurities in the system and residues in the heat transfer fluid are circulated with the cold oil, and the filter in front of the oil pump is filtered out. After the cycle is over, the filter should be disassembled to remove the filter. And dirt on the filter. ! If you are interested in diesel combustion engines, please contact us for a quote!