The Furnace Chamber of Batch-Type Oil Refining Equipment

The Furnace Chamber of Batch-Type Oil Refining Equipment

The furnace chamber of batch-type oil refining equipment is the integral heating space and enclosure structure outside the furnace liner, which can be regarded as the "heating room" of the equipment. It integrates core components such as the combustion system, furnace liner and thermal insulation layer, providing a sealed and controllable high-temperature heating environment for pyrolysis reactions, and is a key area to ensure the equipment's heat supply and thermal efficiency.

Core Functions

Providing a Sealed Heating Space

The furnace chamber is a closed cavity structure, which can isolate the internal high temperature from the external environment and prevent massive heat loss. Meanwhile, it can restrict the flow range of high-temperature flue gas or heat transfer oil generated by combustion, ensuring that the heat source acts intensively on the furnace liner and reactor vessel to improve heat utilization efficiency.

Integrating Supporting Heating Components

The interior of the furnace chamber must reserve installation positions for burners, flue interfaces, temperature measurement points, etc., which are used to fix burners, arrange flue gas flow paths and install temperature sensors. Under some working conditions, heat exchange tubes are also arranged in the furnace chamber to assist in regulating heating temperature and achieve precise temperature control of the reactor vessel.

Safety Protection and Thermal Isolation

The outer wall of the furnace chamber is equipped with a multi-layer thermal insulation structure (such as aluminum silicate fiber + rock wool) to reduce the temperature of the outer wall and prevent scalding of operators. Meanwhile, the load-bearing structure of the furnace chamber must have a certain pressure resistance to avoid cavity deformation caused by internal temperature fluctuations and ensure the safe operation of the equipment.

Structural and Material Design Key Points

Overall Structural Design

Adopt a square or cylindrical enclosure structure; the cylindrical structure is more conducive to uniform distribution of flue gas, while the square structure facilitates installation and maintenance. The furnace chamber must be reserved with an access door to facilitate regular inspection of burners and furnace liners as well as ash cleaning.

A baffled flue gas channel must be designed inside to extend the residence time of high-temperature flue gas in the furnace chamber and enhance the heat exchange effect with the furnace liner. The flue gas outlet must be set at the end of the furnace chamber to ensure that the flue gas is discharged after sufficient heat exchange.

Material Selection

Furnace chamber inner wall: Directly exposed to high-temperature flue gas (temperature up to 800–1000℃), it must be made of high-temperature resistant and oxidation resistant materials such as 310S stainless steel or heat-resistant cast iron to prevent high-temperature oxidation and deformation.

Furnace chamber outer wall: Focus on structural strength and thermal insulation, Q235 carbon steel is sufficient; a thermal insulation layer is installed on the outside to balance cost and protection effect.

Thermal insulation layer: The inner layer is aluminum silicate fiber felt (temperature resistance ≥1200℃), the outer layer is rock wool board, and the outermost layer is covered with color steel plate for protection to reduce heat loss.

Hierarchical Relationship with Furnace Liner and Reactor Vessel

The structural hierarchy from inside to outside is: Reactor Vessel Body → Furnace Liner (Heating Jacket) → Furnace Chamber (Heating Room)

Reactor Vessel: Carries materials for pyrolysis.

Furnace Liner: Directly transfers heat to the reactor vessel.

Furnace Chamber: Provides stable heat source and sealed heating environment for the furnace liner.