What are the reasons for the corrosion of the diesel burner of the gas heat conduction oil boiler?

Heat transfer oil boiler diesel burner is a general term for a type of boiler diesel burner that uses heat transfer oil to transfer heat to heating equipment. Usually it is classified by different fuels. As long as the staff strictly follow the maintenance and maintenance manual in daily operation, the boiler diesel combustion engine is rarely dangerous. However, if the staff does not strictly follow the manual, it will cause serious corrosion of the boiler diesel burner, which is very likely to bring a crisis to the future operation of the boiler diesel burner. So what are the common reasons for the corrosion of the gas heat conduction oil boiler diesel combustion engine? How can we solve it? The advantages of gas-fired heat-conducting oil boiler and diesel burner. Horizontal gas-fired heat-conducting oil boiler light oil burner is a common heating equipment, mainly used for heating occasions above 100 degrees. The working principle of the horizontal gas heat conduction oil burner light oil burner can make the horizontal gas heat conduction oil burner light oil burner obtain a higher working temperature at a lower operating pressure, and has the technical characteristics of low pressure and high temperature. It can realize stable heating and precise temperature adjustment to meet different requirements. At all levels of load, the thermal efficiency can be maintained at an optimal level. The horizontal heat transfer oil furnace has a complete operation control and safety monitoring device, which is easy to operate, safe and reliable. Closed circuit, liquid phase heat exchange, low heat loss, significant energy saving effect, and low operating cost. The horizontal gas heat conduction oil burner light oil burner is installed quickly, convenient for transportation and short installation period. The structure is compact, can be arranged in a single layer, and the investment in the boiler diesel combustion engine room is small. The horizontal gas-fired heat-conducting oil boiler diesel burner has good thermal insulation performance, adopts high-efficiency thermal insulation materials and advanced construction technology, and has low heat loss on the furnace wall. The principle of the horizontal gas-fired heat-conducting oil burner light oil burner uses biomass, heavy oil, light oil or flammable liquid as fuel, and heat-conducting oil as the heat carrier. The combustion of the biomass heat transfer oil furnace uses a circulating oil pump to force the liquid phase to circulate, and then transfer the heat energy to the thermal equipment, and then return to the DC special industrial furnace for reheating. The advantages of horizontal gas heat conduction oil burner light oil burner can obtain higher working temperature under lower operating pressure, up to 340 degrees. Stable heating and precise temperature. At all levels of load, the thermal efficiency can be maintained at an optimal level. At a temperature of 70, the heat transfer of the liquid phase is 300 times less than that of water. It has a complete operation control and safety monitoring device. Save electricity, save oil, save water, save money. Horizontal gas heat conduction oil stove light oil burner is widely used in petrochemical, textile, printing and dyeing, plastics, rubber, food processing, wood processing, asphalt heating, carton production, vegetable dehydration, baking coatings, casting sand mold drying and other fields. Reasons for the corrosion of the diesel combustion engine of the gas-fired heat-conducting oil boiler The corrosion of the diesel combustion engine and the heating system of the gas boiler comes from two aspects: corrosion during operation and corrosion produced due to improper maintenance during shutdown of the boiler. In short, operation corrosion is related to Stop the furnace to corrode. Operational corrosion is caused by dissolved oxygen in the circulating water of the system, while shutdown corrosion of gas boiler and diesel burner is caused by atmospheric oxygen entering the heating system. Comparing the severity of the damage between the two, the shutdown corrosion caused by poor maintenance is far greater than the running corrosion. For the test surface of oxygen content in water, when the water in the container is in direct contact with the atmosphere, the dissolved oxygen in the water can reach 8.5-10mg/L, and the dissolved oxygen in the circulating water during operation is 3.5ml/L. This first shows that the amount of oxygen in contact with the metal during the shutdown of the gas boiler diesel burner is much greater than that during the operation. Furthermore, the corrosion during shutdown is in a static state, while the operation corrosion is dynamic corrosion. During the shutdown period, when the gas boiler diesel burner, the external network and the indoor pipeline system are in a hollow state without maintenance measures, if there is water in a pipeline, the corrosion of the metal will be very serious. Because when the oxygen in the water is exhausted, new air will continue to dissolve into the water and the corrosion process will continue uninterrupted. During the operation of the gas boiler diesel combustion engine, although the circulating water contains a large amount of dissolved oxygen, it is isolated from the system by the atmosphere after all, the amount of dissolved oxygen is small, and the circulating water flow velocity is high, the corrosion to metals is much less than the corrosion of the boiler. The inspection method for the corrosion of the heat-conducting oil boiler diesel burner. The cause and method of the internal corrosion of the heat-conducting oil boiler light oil burner needs to be carried out according to certain methods and principles. Nowadays, the heat-conducting oil boiler light oil burner is widely used at home and abroad. Corrosion detection methods are flux leakage method and ultrasonic detection method. Ultrasonic method Ultrasonic detection method uses the principle of ultrasonic pulse reflection to measure the thickness of the tube wall after corrosion. The basic principle of the flux leakage method detection is based on the high permeability of ferromagnetic materials. The permeability of the heat conduction oil furnace light oil burner corrosion defect is much lower than that of the heat conduction oil furnace light oil The magnetic permeability of the burner, the light oil burner of the heat-conducting oil furnace is magnetized under the effect of an external magnetic field. When there is no defect in the light oil burner of the heat-conducting oil furnace, most of the magnetic field lines pass through the steel pipe. At this moment, the magnetic field lines are evenly distributed; when there are defects inside the elbow, the magnetic field lines will bend and twist, and a part of the magnetic field lines will leak out of the steel pipe. By detecting the leakage flux from the surface of the magnetized elbow, it can be judged whether the defect exists. During testing, the probe is directed straight to the inner wall of the hot oil furnace to emit ultrasonic pulses. The probe first receives the reflected pulse from the inside and outside of the pipe wall, and then the ultrasonic probe receives the reflected pulse from the outside of the pipe. This pulse is the same as the reflected pulse from the inside and outside. The distance between the journeys reflects the thickness of the pipe wall. The actual testing of the heat-conducting oil furnace and light oil burner needs to be carried out in accordance with the actual conditions and explanations, and the ultrasonic method can be used to verify outstanding methods. The high-temperature components of the heat-conducting oil burner light oil burner, such as the front and rear panels, convection superheater and high-temperature reheater, are the primary structural parts inside the boiler diesel burner. They are used in very harsh environments such as flame, flue gas, and fly ash for a long time. Working in a medium, a series of changes in material organization and functions occur during the work process. These changes involve messy aging and failure mechanisms such as creep, fatigue, corrosion, and erosion. The microstructure of these high-temperature component materials will deteriorate with the extension of working time, and creep damage will occur, such as the loosening of pearlite, the spheroidization of carbides, the accumulation and growth of grain boundaries, the occurrence of creep holes, and grain boundary cracks. . Consequences of improper cleaning of heat transfer oil boiler diesel combustion engine After a long time use of heat transfer oil, the inner wall of the boiler diesel combustion engine will inevitably produce a certain amount of carbon deposits. If the company does not pay attention to the treatment of the carbon deposits of the boiler diesel combustion engine, it will bring a series of Unnecessarily troublesome, there will also be certain safety hazards, so it is very important to clean the heat transfer oil system on a regular basis. High-quality oil should have good stability and reducibility. Normally, the higher the temperature of the oil, the faster the corresponding chemical reaction. At the same time, pay attention to the maintenance of the boiler and diesel burner equipment. It will bring a multiplier effect for the enterprise. Heat transfer oil boiler diesel burner equipment is a boiler diesel burner that uses heat medium oil as the heat transfer medium. It can quickly obtain a higher working temperature under a lower operating pressure. It is because of this advantage that it is widely used in the chemical industry, Petroleum and other enterprises. During the use of heat-conducting oil boiler diesel burner equipment, oxidation reaction is prone to occur after high temperature heating, which will cause the quality of the oil to change. The residual carbon particles make the carbon residual value rise rapidly, and grease stains are formed on the inner wall. If the carbon deposit on the inner wall of the boiler diesel burner equipment is improperly cleaned, it will not only reduce the transfer of thermal efficiency, but also affect the temperature of the production industry, and even bursts caused by local overheating of the inner wall of the boiler diesel burner, causing oil leakage and fires. casualties. According to incomplete statistics, it is not uncommon for fire accidents to occur due to coking on the inner wall of the heat-conducting oil boiler diesel burner coil. This is also caused by many companies not paying attention to the cleaning of the heat-conducting oil boiler diesel burner or not properly cleaning it. What kind of cleaning method will cause problems in the thermal oil system? The first thing to talk about is water washing, the earliest period when the water washing heat transfer oil system appeared, which can be traced back to the 1990s. Due to people’s ignorance of environmental protection and the backward technology level, water-based cleaning agents have once become mainstream cleaning products, but companies that have used water-washing heat transfer oil equipment know that the cleaning of boiler diesel burners is not very thorough, and Fortunately, after a long period of shutdown and a long period of dehydration. In many cases, the hard coking water-based cleaning agent in the boiler diesel combustion engine coil does not play any role at all. At the same time, a large amount of waste water is difficult to discharge in the system, which leads to the easy emulsification of the heat transfer oil when new oil is added. , Thereby reducing the service life of the heat transfer oil. Although the traditional solvent cleaning agent cleans thoroughly but the price is too high, it is often not easy to accept. However, some cleaning companies have developed many solvent cleaning products that are reused many times. Although the cost of single cleaning is lower, it is not conducive to heat transfer oil. Life. Because the heat-conducting oil of many companies is mixed in the solvent cleaning agent that is repeated many times, long-term mixing will easily affect the new oil due to the different brand of heat-conducting oil or the production process. This is why the heat-conducting oil should be used when using it. Matching experiment. In the final analysis, the most effective cleaning method is online cleaning, which breaks the problems of high price of traditional cleaning agents, insufficient cleaning strength, environmental protection after cleaning, and delays in production during cleaning. All cleaning agents are integrated. At present, this online cleaning technology is also imported from abroad and is now very mature in domestic applications. For the safe use of thermal oil boiler diesel burners, the editor here advises users not to blindly choose cleaning products, but to consult professionals. How to prevent the corrosion of heat-conducting oil on the furnace tube? As a heat transfer medium, heat-conducting oil can achieve a high operating temperature under almost normal pressure. Due to its good heat transfer efficiency and wide application range, heat transfer oil is widely used in chemical production. However, the continuous safety accidents of some companies that use heat transfer oil have been plagued us. How to avoid these accidents is our direction. According to statistics, the main reasons for the combustion and explosion of the heat transfer oil system are pipe bursts and leaks. Therefore, we must correctly understand the corrosion characteristics of heat transfer oil in order to improve the safety of heat transfer oil. Heat transfer oil is generally composed of organic compounds such as alkanes, cycloalkanes, aromatics, etc. Theoretically speaking, these organic compounds are very corrosive to steel equipment. However, since the heat transfer oil was put into operation, due to system reasons or imperfect management, the heat transfer oil accelerated aging, early scrapping and accidents occurred. When the heat transfer oil is in use, if there is no nitrogen protection, the heat transfer oil will oxidize with oxygen in the air when it comes in contact with oxygen at high temperatures to generate acidic substances. These acidic substances are corrosive to system metals at high temperatures. . In addition, the presence of acidic substances will further promote the polymerization reaction of the heat transfer oil. The viscosity of the heat transfer oil will increase, which will affect the heat transfer efficiency of the heat transfer oil and accelerate the coking of the heat transfer oil, which will lead to accidents. From the situation of the pipes taken from the light oil burners of some heat-conducting oil furnaces with tube bursts, the furnace tube has multiple perforations due to overheating and oxidation, and there is a thicker coking layer inside the tube wall, which is due to oxidation. The chain reaction. Therefore, to prevent the heat transfer oil from corroding the pipes of the heating system, the problem of oxidation of the heat transfer oil is first solved. To prevent the heat transfer oil from corroding the system pipeline, the following points can be summarized: 1. To prevent the heat transfer oil from directly contacting the air, the best measure is to install a nitrogen seal or other inert gas protection for the system. 2. Strictly carry out dehydration and dehydrogenation treatment to prevent moisture, low boiling substances or other foreign impurities from entering the heat transfer oil heating system. 3. Ensure the flow rate of the heat transfer oil in the furnace tube to avoid overheating of the furnace tube due to insufficient oil, resulting in accelerated deterioration of the heat transfer oil. 4. Regularly check the online heat transfer oil, and take appropriate measures to solve the influencing factors and existing problems in time according to the changes in the test results.


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