VTcy is a revolutionary product from Thermax that replaces conventional thermal oil heaters. It is a solid fuel fired vertical thermal oil heater, with an advanced cyclonic combustor, of modular construction and a compact layout.

Product offering

•  Vertical closed loop thermal oil heater with cyclonic combustor
• Capacity – 1,00,000 to 25,00,000 kcal/hr
• Operating temperature – 280°C
• Fuel – Coal, wood and biomass briquette

Options available

• Operating temperature – up to 300°C
• Complete heater house and accessories on turnkey basis
• Other fuels on request

Circular furnace construction

• Provision for introduction of cycloidal air for complete combustion
• Heat and thus efficiency maintained for a prolonged period due to reduction in refractory damage
• No ingress of air through leakages, as furnace structure acts as a shell lined with refractory on the inside
• Compact design and layout of furnace with aligned primary and secondary ducting

Cycloidal air injection

• VTcy comes with the unique cycloidal air injection technology, where air is injected into the combustion zone in a cycloidal motion thus leading to higher residence time and lower excess air due to better turbulence levels
• Better combustion of volatiles in fuels is achieved, hence incomplete combustion losses are reduced
• Optimum combustion volume and better utilization of furnace aids in effective and complete combustion

Hybrid combustor design

In any combustor, spreading and distribution of fuel is not uniform. While it is densely injected/ loaded at the centre and spread thinner at the periphery, the temperature distribution is exactly reverse – the walls radiating at the periphery have higher temperatures. Special air distribution is required for effective air utilization which then leads to effective combustion. Vicy addresses all these aspects by means of a specially designed hybrid grate layout. Its special features are:

• A fixed grate at the centre of the combustor, which handles the densely spread fuel ensuring proper air ingress and complete combustion, by utilizing primary air from grate bars plus secondary air from the cycloidal air injection
• Sectoral grate bar with tapered pin holes at the peripheral section, which ensures that the precise quantity of required air reaches the periphery of the combustor, without disturbing radiating/peripheral heat zones

Maximised heat transfer

• In VTcy, both inner and outer surfaces of the radiant coil contribute to heat transfer unlike conventional thermal oil heaters, where only the inner surface of the radiant coil contributes to heat transfer
• Higher capacities of VTcy have roof coils which provide more heat transfer area and thermic fluid holdup
• Higher radiation surface counters fouling at convective coil and radiation losses are also effectively reduced due to less surface being exposed to air

Automatic Cleaning

VTcy uses a soot blowing system to keep the tube surface clean and maintain uniform heat transfer. This reduces variation in sufficiency when compared with the effect of manual cleaning in conventional thermal oil heaters.

VTcy is a thermal oil heater of modular construction and a small footprint, which comes with pre-insulated coil and sleek aesthetics. It has been designed and engineered for a host of benefits that also make it the most cost-effective and efficient thermic fluid heater in its class. It is so quick to install and have up and running, that it could even be compared with many plug and play, oil fired coil type units.

• More effective heat transfer area than conventional heaters – Ensures highly effective response to heat load. Also online soot blower operates when the blower stops, ensuring clean coil surfaces, good coefficient of heat transfer and better efficiency.
• Specially designed air pre-heater – Incorporates a cross flow design, which makes the direction of flue gas and air flows opposite and perpendicular to each other, thereby guaranteeing maximum heat transfer from flue gas to air.

• Up to 30% reduction in insulation and cladding than conventional heaters – Translates into huge savings in material, installation time and maintenance.
• Up to 60% reduction in refractory weight/ requirements – Means savings in refractory material as well as of time required for installation.
• Up to 65% reduction in foot print area – Compact layout frees up expensive land for other uses.
• Up to 70% reduction in civil construction for coil mounting – Leads to savings in cement, steel and of time required for installation.
• Overall reduction in height – Without the hassle and additional expense of raising roof height, it means that there are no hidden costs.

Besides the obvious advantages stemming from its breakthrough design and construction enumerated above, the VTcy outscores the conventional Thermopac on several other counts:

• Matching (levelling) of convective and radiant coils eliminated
• Elimination of ash room below convective coil
• Elimination of connecting duct and its refractory