THREE PASS OIL | GAS | DUAL FIRED FULLY AUTOMATIC THERMIC FLUID HEATER
TECHNICAL SPECIFICATION
i - Type – Vertical/Horizontal, 3 pass, Coil Type Thermic Fluid Heater
ii - Capacity – 50000 kcal/hr to 2500000 kcal/hr and above
iii - Temperature - Up to 300°C and above
iv - Fuel - Gas / Diesel/Heavy Oil/ Dual Fuel
v - Thermal Efficiency - 88% + 1% based on N.C.V. of Fuels
vi - Heat Recovery Unit – Economiser (Optional)
vi - Air Preheater - In-built
CONSTRUCTION
i - Vertical / Horizontal Coil type 3 pass Gas / Diesel/Heavy Oil/ Dual Fuel fired Thermic Fluid Heater
ii - Spirally wound heating coil concentrically placed within the assembly formed by outer shell and inner shell
iii - The passage between inner shell and outer shell provided with the Radiator along with the Radiator itself act as a Combustion Air Preheater
iv - Heating coil manufactured out of SEAMLESS PIPE confirming to ASTM – A – 106 Grade B standard
v - Coil hydraulically tested for pressure of 55 kg/cm2 applied for about 30 minutes
vi - Burner components and Air Cone manufactured out of heavy gauge STAINLESS STEEL sheets
vii - Blower provided with statically and dynamically balanced impeller for smooth operation
viii - The control panel is SWITCH GEARED with easy available standard components from market to increase independence
ix - The control panel is WIRED with solid Copper Conductor wires for easy tracing of control circuit adding further independence
OPERATION
i - Fully automatic operation with BURNER ON-OFF modulation for units up to 40 Lac kcal/hr and HIGH-LOW ON-OFF modulation for higher capacity units keeping FUEL CONSUMPTION in proportion with heat demand in the plant
ii - The Burner is pressure atomizing type and is centrally located at the top of the unit
iii - Burner is self igniting and maintains CLEAN and SMOKELESS COMBUSTION all throughout the operation
iv - Preheated combustion Air gives highest Combustion efficiency maintaining high CO2 % and Low Smoke Index
v - Hot Oil circulation pump is of centrifugal type maintaining the circulation of Hot Thermic Fluid through heating coil
vi - A Digital Temperature Controller senses the heat demand in the plant and controls the Burner ON-OFF/HIGH-LOW modulation maintaining minimum fuel consumption
vii - In case of any abnormal operating condition the SAFETIES provided stop the unit and put the same to SAFETY LOCKOUT CONDITION by giving AUDIBLE ALARM and VISUAL INDICATION
SAFETY FEATURES
i - Flame failure device
ii - Thermic Fluid low flow tripping
iii - Overriding temperature tripping
iv - Blow down valve
v - Single phasing prevention cum over load for control circuit
vi - Miniature Circuit Breaker for control circuit
vii - Thermic Fluid level switch on expansion tank (optional)
viii - High stack temperature Annunciation/Alarm (optional)
ix - Fail Safe Instrumentation
x - Control circuit logic ensures Heater going to lock out safety in case of any abnormality in operating condition as well as monitoring instrument failure
COMBUSTION AND HEAT TRANSFER
i - High furnace volume for long furnace residence time ensuring complete combustion of fuel at low excess Air
ii - The Smoke Index is considerably low with low excess Air improving Combustion efficiency
iii - Large radiation surface giving very high heat absorption in furnace with moderate heat flux and heat release rate
iv - Three pass design giving highest total length of passes and longer residence time of flue gases
v - Overall thermal efficiency of 88% on NCV of fuel Oil
vi - The overall thermal efficiency is subject to return Oil temperature from process (minimum return Oil temperature means maximum thermal efficiency)