1、 Characteristics of heavy oil: It is a byproduct of crude oil after refining, usually composed of cracked heavy oil, vacuum heavy oil, atmospheric heavy oil, or wax oil, etc., which are mixed in different proportions. When selecting, the overall requirements should be high calorific value, good combustion performance, moderate viscosity, low corrosiveness and solid impurities, and easy storage and transportation.

Viscosity:

Viscosity represents the quality of fuel flow performance. The higher the viscosity, the worse the atomization effect. It is an important quality and performance indicator for heavy oil, directly affecting the working efficiency and fuel consumption of oil pumps and heavy oil burners. As the temperature increases, the viscosity of heavy oil gradually decreases, so high viscosity oil needs to be heated and heated for smooth transportation and atomization.

Therefore, when selecting oil products, in addition to understanding the conventional indicators of the oil products, it is also necessary to understand the viscosity temperature curve of the oil products to ensure that heating can make the heavy oil reach the viscosity required by the heavy oil burner before atomization. For mechanical atomization burners, the fuel viscosity in front of the nozzle is 2.5-3.5 ° Et, while for high-pressure air atomization burners, the fuel viscosity is 4.5-5.8 ° Et. The units of viscosity are expressed as Engels viscosity (° Et) and kinematic viscosity ν There are two types of t (mm2/s, also known as cSt), and their conversion relationship is: ν t=7.310°Et-6.31/°Et

Sulfur content:

In heavy oil, sulfur can exist in various forms such as elemental substances and compounds. The emission of SO2, SO3, etc. generated by sulfur combustion into the atmosphere will seriously pollute the environment, combine with water vapor, and generate highly corrosive sulfite, sulfuric acid, etc., which will affect the service life of flue, dust collector, and fan. In addition, sulfides in oil have varying degrees of impact on pipelines, valves, pumps, sealing rings, spray guns, etc. Therefore, when choosing heavy oil, the lower the sulfur content, the better, generally less than 3%.

Mechanical impurities:

Mechanical impurities can block the filter screen, spray gun, and oil valve, accelerate the wear of the oil pump and nozzle, and seriously affect the service life of the components. Therefore, it is generally required that the mechanical impurity content of the fuel be less than 0.5-1%.

Flash point and ignition point:

Flash point and ignition point are important indicators of the fire and explosion resistance of fuel, and the higher the temperature, the better. When selecting oil products, it is important to know their flash point and ignition point to determine the heating temperature. In a heavy oil storage tank without pressure opening, the heating temperature should be 10-20 ℃ lower than the flash point, which can effectively avoid fires.

Calorific value:

Heat generation is an important economic indicator of fuel oil, which is directly related to the fuel consumption of industrial kilns. The higher the heat generation, the better. The low heating capacity of oil is usually 38.5-44MJ/kg.

Moisture content:

Moisture is one of the main impurities in fuel, which not only reduces the content of combustible components in the fuel, but also makes it difficult for the fuel to ignite. Excessive moisture can increase pipeline and equipment corrosion, increase exhaust heat loss and transportation energy consumption, and uneven moisture content can lead to flame pulsation or even flameout. Fuel oil should be dehydrated before use, and the moisture content should generally be controlled between 1% and 3%.

Zhengzhou Zhongwei Environmental Protection Equipment Co., Ltd. produces heavy oil burners and undertakes the "turnkey" project of foreign heavy oil rolling furnaces, heavy oil aluminum melting furnaces, heavy oil forging heating furnaces, heavy oil heat treatment furnaces, heavy oil baking equipment, and heavy oil red brick kilns. For more details, please call (WeChat synchronization) 13849187223.

Zhongwei Environmental Protection Group Co., Ltd. (Zhengzhou Zhongwei Environmental Protection Equipment Co., Ltd. and Zhengzhou Deste Automation Equipment Co., Ltd.) undertakes the "general contracting" project of large-scale gas and oil fired kilns, automation control systems, desulfurization and denitrification equipment, kiln refractory material masonry, and online monitoring devices both domestically and internationally. It is a "one-stop" environmental protection kiln solution provider and implementer.