Refinery furnace

Refinery furnaces are crucial components in the oil and gas industry, utilized for various processes such as heating, evaporation, cracking, and other thermal operations. These furnaces come in different sizes and types, each designed for specific applications. Below is an overview of different types of refinery furnaces used in the oil and gas industry, their operation, construction materials, and applications.

Types of refinery furnaces

There are different types of refinery furnaces, each designed for specific purposes. In the following, we mention some common types of refinery furnaces:

Direct Fired Heaters

Direct fired heaters are heated directly by flames from fossil fuels such as natural gas, oil, or propane. They are widely used for the direct heating of raw materials, such as crude oil or natural gases.

  • Operation: Flames directly contact tubes containing fluids, transferring heat to the fluid.
  • Construction Materials: Typically made from heat-resistant and corrosion-resistant steel to withstand high temperatures and corrosive conditions.
  • Applications: Heating crude oil, evaporating chemicals, and other direct thermal processes.

Indirect Fired Heaters

In indirect fired heaters, heat is transferred indirectly to the fluid through a heat transfer medium, which can be a metal or thermal fluid circulating in a closed loop.

  • Operation: Heat is generated by an external source and transferred to a heat medium, which then transfers the heat to the fluid.
  • Construction Materials: Alloy steel with high resistance to heat and corrosion, along with ceramic coatings to enhance heat transfer efficiency.
  • Applications: Sensitive processes where contamination from direct flames must be avoided, heating chemicals and oils without direct flame contact.

Cracking Furnaces

Cracking furnaces are used to break down larger molecules into smaller ones. This process is typically used to produce more valuable products like ethylene and propylene from crude oil.

  • Operation: Hydrocarbons are heated to high temperatures (800 to 900°C) in the presence of specific catalysts to break the molecules.
  • Construction Materials: High-temperature and corrosion-resistant alloy steels, ceramic materials, and special catalysts.
  • Applications: Production of petrochemical products like ethylene, propylene, and other valuable organic compounds.

Regenerative Thermal Oxidizers

These furnaces are used to burn and eliminate organic pollutants from exhaust gases. They help reduce emissions and protect the environment.

  • Operation: Pollutant gases are directed into the furnace and burned at high temperatures (around 800 to 1200°C) to convert pollutants into harmless compounds.
  • Construction Materials: Heat-resistant stainless steel, ceramic materials, and refractory bricks to withstand high temperatures.
  • Applications: Treating exhaust gases from industrial processes and reducing environmental pollutants.

Fluidized Bed Furnaces

Fluidized bed furnaces are used for heating and chemical reactions in a fluidized bed. Small solid particles are suspended in a gas flow and act as a reaction bed.

  • Operation: Small solid particles are suspended in a gas flow and heated uniformly as they act as a reaction bed.
  • Construction Materials: Heat-resistant and corrosion-resistant steel, ceramic materials, and catalysts.
  • Applications: Combustion of coal, energy production, and chemical reactions.

Electric Furnaces

Electric furnaces use electrical energy to generate heat and are particularly useful in processes requiring precise temperature control.

  • Operation: Electrical current passes through heating elements, generating heat.
  • Construction Materials: Stainless steel, refractory bricks, and heating elements such as nickel-chrome alloys.
  • Applications: Oil refining processes, production of specialty chemicals, and laboratory processes.

Steam Boilers

Steam boilers play a crucial role in generating steam for various industrial processes. They operate using fossil fuels like natural gas, oil, or coal.

  • Operation: Water is heated in a closed chamber and converted to steam, which is then used to drive turbines or for heating industrial processes.
  • Construction Materials: Alloy steel resistant to heat and corrosion, ceramic materials for lining.
  • Applications: Steam generation for thermal power plants, oil refineries, and chemical processes.

Distillation Furnaces

Distillation furnaces are used to separate different components of crude oil based on their boiling points. They assist refineries in separating various petroleum products.

  • Operation: Crude oil is heated in the furnace and reaches different temperatures; the resulting vapors are sent to distillation columns to be separated based on boiling points.
  • Construction Materials: Heat-resistant stainless steel, refractory bricks for lining.
  • Applications: Refining crude oil and producing various products such as gasoline, diesel, and kerosene.

Chemical Reactors

Chemical reactors are designed for carrying out chemical reactions at high temperatures and are commonly used in petrochemical and chemical production processes.

  • Operation: Reactants are heated inside the furnace to perform desired chemical reactions, with precise control of temperature and pressure.
  • Construction Materials: High-temperature and corrosion-resistant alloy steels, ceramic coatings, and specific catalysts.
  • Applications: Production of chemicals like ammonia, methanol, and ethylene.

Waste Incinerators

Waste incinerators are used to burn industrial waste and convert it into ash and harmless gases. This process helps in reducing waste volume and managing industrial waste.

  • Operation: Waste is burned at very high temperatures to convert organic materials into ash and harmless gases.
  • Construction Materials: Heat-resistant steel, refractory bricks, and ceramic materials for high-temperature durability.
  • Applications: Industrial waste management and reduction of waste volume in refineries and petrochemical complexes.

Desulfurization Furnaces

Desulfurization furnaces are used to remove sulfur from crude oil and petroleum products. Sulfur in oil can create environmental pollutants, making its removal important.

  • Operation: Crude oil or petroleum products are heated in the furnace and sulfur is removed in the presence of specific catalysts.
  • Construction Materials: Heat and corrosion-resistant alloy steels, specific catalysts for desulfurization processes.
  • Applications: Producing sulfur-reduced petroleum products and decreasing sulfur emissions.

Flash Furnaces

Flash furnaces are used for rapid heating and converting liquids into vapor. This process is often used in steam generation for refining and petrochemical processes.

  • Operation: Liquids enter the furnace and are rapidly converted to vapor. This vapor is used for various processes.
  • Construction Materials: High-temperature resistant alloy steel, ceramic materials for lining.
  • Applications: Instant steam production for refining and petrochemical processes.

Plasma Furnaces

Plasma furnaces use plasma to create very high temperatures and are used for specific processes requiring extremely high temperatures.

  • Operation: Gas is converted into plasma, generating extremely high temperatures for melting or decomposing materials.
  • Construction Materials: High-temperature-resistant materials like tungsten, specific ceramics.
  • Applications: Advanced chemical processes, production of special materials.

High Frequency Furnaces

High-frequency furnaces use high-frequency electrical currents to generate heat and are suitable for precise and rapid thermal processes.

  • Operation: High-frequency electrical current passes through coils, creating heat.
  • Construction Materials: Copper coils, stainless steel, electrical insulation materials.
  • Applications: Precise thermal processing, melting of special metals.

Solar Furnaces

Solar furnaces use solar energy to produce heat and are used in cases where renewable energy is required.

  • Operation: Solar energy is collected and focused by curved mirrors to generate high temperatures.
  • Construction Materials: Curved mirrors, heat-resistant materials, heat collection and transfer systems.
  • Applications: Scientific experiments, renewable energy production.

Shaft Furnaces

Shaft furnaces are designed vertically with materials entering from the top and exiting from the bottom. They are used for continuous operations.

  • Operation: Materials enter from the top and move downward, being subjected to heat as they progress.
  • Construction Materials: Heat-resistant steel, refractory bricks.
  • Applications: Metal melting, continuous thermal operations.

Induction Furnaces

Induction furnaces use magnetic fields to generate heat and are suitable for melting metals and precise thermal operations.

  • Operation: Electrical current passes through a coil, generating a magnetic field that heats metals.
  • Construction Materials: Copper coils, insulating materials, heat-resistant steel.
  • Applications: Metal melting, precise thermal processing.

Advantages and disadvantages of  refinery furnaces

Advantages

Most of the heat required for oil refining is produced through furnaces.

Disadvantages

A quarter of the cost of refining is related to the fuel that burns in the furnaces.

Conclusion

Refinery furnaces play a vital role in various processes in the oil and gas industry. The choice of furnace type depends on the specific process, temperature requirements, materials used, and the needs of each operation. These furnaces are constructed from heat-resistant and corrosion-resistant materials to withstand harsh industrial conditions, enhancing process efficiency and safety.

refinery furnaces

Furnace construction

Petro structure company is the operator of all types of distillation towers, vacuum towers, vessels, flares, furnaces, etc. This complex has the possibility of building a furnace by using the expert forces and the required equipment. Contact our experts for expert advice.

References

  • Process Heating
  • Thermal Processing
  • Industrial Heating
  • PetroWiki
  • GlobalSpec
  • The Balance Small Business
Done projects
Blog & News