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Marine heavy oil energy-saving technical equipment
Intelligent Heavy Oil Energy Saving Technology and Equipment Overview of Heavy Oil High Efficiency Energy Saving Technology Heavy Oil High Efficiency Energy Saving Technology is that heavy oil is mixed with water by a kind of intelligent heavy oil high efficiency energy saving technology equipment to independently complete the oil, water, agent automatic metering, mixing homogenization, grinding refinement and other technological processes, the production of emulsified oil is stable without stratification. This kind of intelligent technology equipment can carry out shearing and crushing, mixing and homogenization, crushing and grinding, etc. in the precise and narrow multi-level concave-convex labyrinth according to the proportion of oil drops and water drops, and also bear the high-frequency friction, violent vibration and turbulence formed when the concave-convex grinding thousands of blades are running at relatively high speed, thus generating powerful rushing waves and ultrasonic waves, after the process requirements of crushing the impurities in the heavy oil residue, such as oil pollution, asphalt block, colloid group and other particles, tearing the molecular chain of liquid droplets, etc., the micro water is evenly dispersed in the residue to form a water-in-oil (w/o) emulsion. When this emulsified heavy oil is sent to the nozzle and sprayed into the combustion furnace in the form of atomized mist, the oil droplets of this emulsified oil will be immediately coated with super high temperature once burned, the tiny water droplets in the oil droplets are rapidly expanded by the strong heat vaporization volume and instantly explode the oil droplets, causing the "micro-explosion effect" to break the oil droplets into finer mist-like oil droplets. At this time, the water vapor and carbon react chemically in the high-temperature combustion to generate water gas, which burns again, increases the combustion heat release, eliminates black smoke and prevents coking, the emission of sulfur dioxide and dust can be reduced, and the original coking can be eliminated, and a large amount of water vapor generated in combustion is triatomic, which can further strengthen heat conduction and heat radiation, improve heat transfer effect, shorten combustion time, fully burn heavy oil, bright flame, improve thermal efficiency and eliminate black smoke. Moreover, this emulsified oil is widely used in thermal power equipment such as marine diesel engines, industrial furnaces, kilns and marine boilers. Intelligent heavy oil energy-saving technology and equipment At present, although there are many research on the application of common equipment for heavy oil blending and emulsification at home and abroad, there are few experimental research on intelligent automatic fine emulsification heavy oil. For this reason, Nantong Flake entrusts Southeast University to conduct special research on heavy oil intelligent high-efficiency energy-saving technology and equipment, and to conduct in-depth research and development on the actual performance of the equipment and the application of heavy oil emulsification formula, track and test the technical performance of heavy oil intelligent technology and equipment in the process of use, and strive to make heavy oil emulsification technology equipment achieve high efficiency, energy saving and environmental protection. Intelligent heavy oil high efficiency and energy saving technology is composed of a set of intelligent automatic PLC control system and emulsifying machine, mixer, flow valve, metering pump, shearing machine, double shear mill, sensor and so on. Its core technology patented equipment for the two-stage shear colloid mill, its main structure is due to the emulsifying machine, crusher, colloid mill and other combinations. The first stage is a high-shear mixing homogeneous structure: the rotating stator is composed of four sets of shear layers and hundreds of toothed blades, which mix heavy oil, water and agent at high speed, shear crushing and homogeneous emulsification. The second stage is the crushing and grinding homogenization structure: the rotating and grinding mill is composed of three regions, ten shearing and grinding zones and thousands of tooth grooves with different sizes and uneven teeth. It mainly meets a series of complex and strong mechanical movements such as high-speed shearing, strong friction, particle tearing and diversified high-frequency shearing and grinding, so as to break the molecular chain of heavy oil droplets, particle crushing, liquid particle tearing and other process requirements, moreover, for the dispersed phase particles and insoluble droplets in heavy oil that have not yet been dispersed, it is necessary to use a crushing colloid mill with stronger performance to complete, so that these small water rubber can be re-dispersed in a more precise, narrower and more advanced multi-level concave-convex labyrinth crushing area for grinding, and it must withstand the high-frequency friction, violent vibration and turbulence formed when the concave-convex grinding thousands of blades are running at relatively high speed, as a result, a powerful flushing wave and ultrasonic wave are generated, so that the molecular chain of liquid droplets is broken, the particles are broken, and the liquid particles are shredded, so that the finer the degree of refinement of the water droplets is, the better the dispersion and emulsification effect is, so as to achieve good stability and long storage time after emulsification of heavy oil. The economic benefits of heavy oil emulsification energy saving The key to heavy oil emulsification energy saving technology is to reasonably control the mixing ratio of heavy oil, water and emulsifier. The emulsifier generally accounts for 0.1~0.25 of the water intake, and the mixing rate of heavy oil is generally 15% ~ 25%. The emulsification effect of too little water is not good, and the "blasting" atomization effect is not good. Too much water will affect the thermal efficiency of the furnace and the stability of the emulsion due to the excessive heat absorption of the emulsified water. Heavy combustion oil (commonly known as residual oil) is widely used in thermal power equipment such as industrial furnaces, kilns and marine boilers. However, due to its large amount of colloid and asphaltene, it is heated (65 degrees) before being fully contacted with oxygen to generate carbon black (carbon analysis). When the air is insufficient or poorly mixed, the carbon black is too late to burn and cause black smoke, which hinders the normal operation of the equipment and causes energy loss and air pollution. Therefore, the heavy oil emulsification technology is a new energy-saving technology, which not only saves energy, but also reduces environmental pollution and sulfur in flue gas. The content of nitrogen oxides and soot. The combustion of emulsified oil can not only strengthen the combustion in the furnace by its micro-explosion effect, but also enhance the convective heat transfer effect of the furnace by the strong agitation and turbulence generated by the micro-explosion effect. The superheated steam can increase the blackness of the flue gas in the radiation chamber, strengthen the radiation heat exchange, increase the heat flux per unit volume of the furnace, and improve the heat load capacity per unit of steel, so that the rigid material consumption of the radiation chamber and convection chamber can be reduced, the innovation and improvement of the combustion furnace can be driven from the structure, and the cost of the furnace can be reduced. In addition, in the combustion process, the mixed water vaporizes and absorbs heat in the furnace, so that the local temperature of the flame center drops and tends to be uniform, and low-temperature combustion is realized, which is conducive to reducing the generation of nitrogen oxidation and sulfur oxides, and meeting environmental protection requirements. At high temperature, water vapor reacts with the incompletely burned carbon particles. The coal-water reaction does not increase the combustible components of the combustion, but can increase the burnout rate of the combustible components and increase the actual calorific value. The presence of water vapor in the oil mist produces a large amount of hydroxyl ions, which can accelerate the combustion of CO, thereby reducing the excess air coefficient. In this way, the heat carried away by the air heating and the flue is reduced accordingly. In addition, after water becomes steam, it produces a stripping effect, which can remove the gas film formed by inert gases such as CO2.N2 on the surface of oil droplets, accelerate the combustion process and heat conduction, and improve the heat transfer efficiency. After using emulsified oil as fuel, the fuel saving rate of the furnace can be 10% ~ 20%. Economic calculations show that after the use of emulsified fuel technology, all its engineering investment can be recovered within one month. Therefore, it has better economic benefits.
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