A coal-fired boiler refers to the coal that is burned as fuel. After the heat of the coal is converted, it generates steam or turns into hot water. However, not all of the heat is effectively converted, resulting in some reactive power consumption. This leads to efficiency issues. Generally, larger boilers have higher efficiency, ranging from 60% to 80%. Coal-fired boilers can be converted to heavy oil as fuel, and the heavy oil burner, also known as the heavy oil burner, is produced by Zhengzhou Zhongwei Environmental Protection Equipment Co., Ltd. The following is a brief description of the characteristics of the boiler's conversion to heavy oil burner:

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.

1. Viscosity: Refers to 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, and directly affects the working efficiency and fuel consumption of oil pumps and heavy oil burners (professional introduction on the website, no longer described). 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.

2. 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%.

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%.

4. 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.

5. 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.

6. Water 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. undertakes the "general contracting" project of industrial kilns, boilers, "coal to oil" and "coal to gas" projects, dust removal equipment, fuel burners, and control systems, and is responsible for the design and construction of "turnkey" engineering projects.