Heavy oil rotary kiln burner rotary kiln burner

The heavy oil rotary kiln burner is a combustion device specially designed by Zhengzhou Zhongwei Environmental Protection Equipment Co., Ltd. for heavy oil with high viscosity and poor atomization performance to improve the combustion performance of heavy oil. It mainly consists of heavy oil tanks, diesel tanks, oil filters, heavy oil supply pumps, heat exchangers, light and heavy oil cutting and changing valves, fuel pumps, pressure regulating valves, burners and their delivery pipelines.

Introduction to heavy oil rotary kiln burner equipment:

The heavy oil rotary kiln burner is an important component of the rotary kiln equipment, which is a combustion device using heavy oil fuel. The working principle is that the heavy oil enters the burner in two ways, namely swirling oil and axial oil, similar to the internal and external air of the burner. The swirling oil is distributed in a circular shape outside; The axial flow oil is a cylindrical direct jet flow in the middle. When it reaches the head of the spray gun, it converges into one way and enters the kiln through the nozzle hole of the atomizing sheet, which is divided into various specifications according to the size of the nozzle hole. During the heating and feeding process, replace different specifications of atomizers as needed. The structure of the kiln tail burner is the same as that of the kiln head, but the proportion of internal air is much greater than that of external air. The difference between the inlet oil pipe and the kiln head burner is that one path is for oil inlet and the other path is for oil return.

Designing a heavy oil rotary kiln burner is familiar with the important properties of heavy oil fuel: heavy oil is a byproduct of crude oil refining, generally composed of cracked heavy oil, vacuum heavy oil, atmospheric heavy oil, or wax oil, etc., which are modulated 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:

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 the oil pump and nozzle. As the temperature increases, the viscosity of heavy oil gradually decreases. Therefore, for smooth transportation and atomization of high viscosity oil, heavy oil heaters are used to heat and enhance its fluidity.

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 before the heavy oil burner is 2.5~3.5 ° Et, and the fuel viscosity for high-pressure air atomization burners is 4.5~5.8 ° Et.

The unit expressions of viscosity are: Engler 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

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 pressure free open heavy oil storage tank, the heating temperature should be 10-20 ℃ below the flash point, which can effectively avoid fires.

5. Calorific value:

Heat generation is an important economic indicator of fuel, and the higher the heat generation, the better. The normal low heat generation of oil is 38.5-44MJ/kg.

6. 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%. For more information, please call (WeChat synchronization): 15713691937.

Considering the characteristics of heavy oil fuel, Zhengzhou Zhongwei Environmental Protection Equipment Co., Ltd. undertakes the heavy oil rotary kiln burner equipment project for foreign markets, especially in Africa. It is responsible for the design, production, installation, debugging, and training of the "turnkey" project.

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