OIL FUEL ROTARY KILN For Sale

Oil Fuel Rotary Kiln Introduction

Oil-fueled rotary kiln is a kind of rotary kiln equipment with fuel oil (such as heavy oil, diesel fuel, etc.) as the heat source, which is directly heated by the oil burner on the outer wall of the rotary kiln pipeline, and the materials in the pipeline of the oil-fueled rotary kiln are heated by heat conduction, so as to avoid the pollution of the materials by burning the volatile substances. It is widely used in building materials, metallurgy, chemical industry, environmental protection and other industries for calcining, roasting, drying or heat treatment of materials. Oil fuel heating is mostly used in cement rotary kiln and lime rotary kiln.

Oil rotary kiln can be divided into crude oil rotary kiln, diesel rotary kiln and so on according to different types of fuel, and the burners used in both of them will be different. Fuel is injected in the form of oil mist through nozzles and ignited by an ignition device. The fuel oil is evenly distributed in a straight line on one side of the heated kiln body, and the open flame is sprayed directly on the outer surface of the rotary kiln pipe.

Oil-Fired Rotary Kiln Working Principle

The working principle of fuel rotary kiln can be told from three stages of material movement, combustion and heat transfer, temperature partition.
Material movement: the material enters the kiln from the relatively high tail, moves slowly to the kiln head with the cylinder rotation and tilting angle, and is heated by physical or chemical reactions in the process.

Combustion and heat transfer: Fuel oil is burned in the kiln head or kiln to form a high temperature flame and flue gas, which transfers heat to the material through radiation, convection and conduction. The flue gases flow counter-currently or in parallel with the material and are eventually discharged from the end of the kiln.

Temperature zoning：

• Drying zone: low temperature zone (200-600°C), removing moisture.
• Calcination zone: high temperature zone (800-1600℃), decomposition or sintering reaction occurs.
• Cooling zone: material cools down and is discharged from the kiln head.

Oil-Fired Rotary Kiln Advantages

The oil rotary kiln with oil mist combustion reaction is fast, and the heating process is fast, which is conducive to shorten the cold and hot process of the rotary kiln, and can effectively shorten the heating time. In addition, oil rotary kiln has the following obvious advantages.

Reducing powder sticking to the wall and improving powder performance
The oil rotary kiln has been improved in the following aspects: increasing the kiln tube inlet temperature, increasing the intensity of kiln ventilation, and disturbing the powder in the kiln by using a percussion hammer.

Very good powder consistency
The consistency of the product depends on the degree of adhesion of the powder to the wall of the kiln tube. Since the oil-fired rotary kiln solves the problem of powder sticking to the wall very well, the powder consistency produced during the pre-firing process of the powder is very good.

High production capacity
Fuel rotary kiln is a large rotary kiln equipment. The production capacity of one oil-fired rotary kiln is equivalent to that of 2-3 electrically heated rotary kilns, with an annual output of 3,600 tons. The oil-fired rotary kiln also saves land and reduces maintenance.

Mature technology, simple operation
Oil burning technology is mature, with a stable control system and relatively low technical requirements for operators. The ignition and shutdown process is faster than coal-fired kiln, which is suitable for intermittent production or commissioning stage.

Simple equipment structure and low maintenance cost
No need for crushing, conveying and other supporting systems of coal-fired kilns, fewer equipment failure points, less maintenance workload.

Limitations of Oil Fired Rotary Kiln and applicable scenarios

Higher cost: Due to the high fluctuation of fuel oil price, the cost is significantly higher than coal or natural gas in long-term operation, which is more suitable for areas with low electricity price or strict environmental protection requirements.

Carbon emissions: fuel oil is a fossil energy source with high CO₂ emissions, which may be replaced by other rotary kilns (e.g. biofuel or electric heating) under the requirement of “double carbon”.

Scenario: Currently, it is mostly used in small-scale production with high environmental protection requirements, and more likely to be used as a backup kiln.

Oil Fired Rotary Kiln Technical Parameters