Evaporator Coil

Evaporator Coil

Flue gases, a byproduct of boiler combustion, take away heat that is frequently left unused. To harness this untapped energy, economiser coils are positioned strategically along the flue gas route. As hot flue gases flow through the coils, they transfer their thermal energy to the fluid, usually water. This captured heat is then recycled back into the system, preheating the feedwater before it enters the boiler.

Evaporators in Boilers are designed to maximise heat transfer efficiency. The core of a studded bed coil is a network of high-quality tubes, often made of carbon or alloy steel. These tubes serve as conduits, transporting water and steam throughout the boiler system. However, what actually distinguishes studded bed coils is the presence of strategically positioned studs—small, projecting pieces welded directly to the surface of the tubes.

Revolutionizing Heat Exchange

While a smooth tube transports heat, the contact surface between the tube and its surroundings is restricted. Studded bed coils use a revolutionary method, greatly expanding the surface area of the tubes using welded studs. This modification creates a considerably bigger platform for heat exchange, resulting in a significant improvement in thermal energy transfer from the hot fluidised bed (a bed of particles suspended in a hot gas stream) to the fluid flowing through the tubes.

Precision Welding in Boiler Technology

Welding these studs onto the tubes is an intricate process. Our expertise is in applying the advanced "drawn arc" technology. The drawn arc approach produces high-quality, secure welds even with limited space. This careful approach is essential for optimising heat transfer efficiency and avoiding leaks or failures in the high-pressure boiler setting.

Our stud welding machines use the arc-drawn method and can weld studs up to a maximum size of 25mm dia even at very close pitch.
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Product Benefits

The benefits of studded evaporator coils extend far beyond simply improving heat transfer. The studs themselves contribute to several crucial aspects of boiler operation:

Structural Integrity

The studs function as small reinforcements, increasing the tubes' structural integrity. This is particularly critical in high-pressure situations

Improved Mixing

The studs' tight spacing produces a "scrubbing effect" as fluid runs through the bed. This lessens the likelihood of scaling and fouling on the tube surfaces, a significant problem in boiler operations. In the long run, this means less maintenance and higher boiler efficiency

Reduced Hot Spots

Studded bed coils help prevent localised hot spots on the tubes by facilitating better mixing inside the fluidised bed. This lowers the likelihood of thermal stress and consequent tube damage

There isn't a single-size-fits-all option for evaporator coils. They come in various configurations and designs, each precisely engineered to meet the specific needs of a particular boiler system. The desired level of heat transmission, boiler size, and fuel type are all important considerations when selecting the best design for a specific application.

Get in touch with our team of experts!

Corporate Office

RIBO Industries Private Limited,
#9, 1st Main Road, Raja Colony, Cantonment, Tiruchi 620001,
Tamilnadu, INDIA.

Manufacturing Unit

Tiruchi - Pudukottai NH 336, Mandaiyur 622515,
Pudukkottai Dt., Tamilnadu.

Boardline: +91 875 400 8644

Email: marketing@ribo.in

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