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Enertech Classic 3-pass wet back package fire tube boiler

CLASSIC 3-PASS WET BACK PACKAGE FIRE TUBE BOILER

PRODUCT OVERVIEW

The Enertech Classic 3-Pass Wet Back Package Fire Tube Boiler is a high performance boiler unit with design parameters based on the generously built top of the line US boilers, suitable for firing bunker C oil, Diesel oil, LPG or Natural Gas. It is available in capacities from 60 to 1500 boiler horsepower (940 to 23,500 kg/h), with operating pressures of up to 270 psig (18.63 Bars). This unit is ideal for large factories where steam cost is a critical issue.

HIGH EFFICIENCY, LOW COST OPERATION - The Enertech CLASSIC 3-Pass Wet-back Boiler is highly efficient, attaining therminal efficiencies of up to 93% at MCR when firing heavy oil (based on net calorific value of fuel). The 3-Pass wet-back design combined with a generous heating surface of 5 square feet per boiler horsepower, and highly efficient full modulation, air/stream atomized burner with 5:1 turn down, enables the unit's very high efficiencies. This is evident through the unit's very low exit gas temperature. This translates to large savings in fuel cost.

FULLY AUTOMATIC OPERATION - Fully automatic controls are provided for continuous operation with minimal attendance. The burner has full modulation control which matches the firing rate with load demand. The water level in the boiler is controlled by float type water level controller automatically controls the operation of the feedwater pump and acts as the first low water cut-off/alarm, shutting down the burner in the event of a low water condition due to failure of the feed water pump or excessive withdrawal of steam. A back-up probe-type low water cut-off is standard to assure positive protection of the boiler. The operating pressure is controlled by two pressure controllers: one controls the burner on/off based on the high and low operating limits, and the other acts as modulating control to adjust firing rate based on steam demand.

SAFE OPERATIONS - A "Fail-Safe" Control which exceed trim and accessory requirements of ASME Code, has been integrated into the combustion system for total operational safety. The micro-processor-based integrated burner control provides automatic burner sequencing and flame supervision for a safe burner light off and shutdown. Furthermore, the burner control provides status indication and self diagnostics through a keyboard display module. The burner shuts down automatically in the event of flame failure, draft loss, low water and excessive steam pressure. Sufficiently sized safety valves are provided to relieve pressure in case of over pressure.

Photo Gallery: Enertech's Classic Boiler Successful Projects

CONSTRUCTION FEATURES

  • Davited front doors and split/hinged rear doors allow total access to return tube for ease in cleaning and maintenance.
  • Front and rear doors are held shut using studs with lugs and brass nuts for easy removal.
  • Front smoke box and doors are lined with space-age ceramic fiber.
  • Large furnace - large diameter and sufficient length, provides required furnace volume assuring complete combustion of fuel, especially heavy oil. Furnaces are of ring-reinforced type providing a very rigid structure and at the same time additional heating surface from the stiffener rings.
  • Wet-back design turnaround eliminates the need for refractory lining, baffles, gaskets and provides additional primary heating surface for increased efficiency.
  • Two-inch thick 132 kg/cu cm density mineral wool insulation reduces heat loss through the shell surfaces.
  • Round smoke outlets requires only a stub stack for proper draft.
  • Stainless steel finish for shell, to provide aesthetic and durability.
  • Structural steel skid base supports and projects boiler and burner.
  • Control panel is burner or boiler mounted for ease or operation and maintenance.
  • 3-Pass design for optimum efficiency and economical operation.
  • Burners are available in gas, light or heavy oil, and combustion; with air, steam or combustion, and pressure atomization of the oil.

FEATURES

  • Capacities from 60 to 1500 Bo. HP (940 to 23,500 kg/h).
  • Operating Pressure of up to 270 psig (18.63 Bars).
  • High efficiency, attaining thermal efficiency of up to 93% at MCR when firing heavy oil (based on LHV) 3 pass wet-back design combined with a generous heating surface of 5 sq/ft per BoHP. Wet back design eliminates heavy refractory at rear door reducing maintenance cost.
  • Highly efficient full modulation U.S. made Industrial Combustion Burner, air/steam atomized burner with 5:1 turn down, attains very high combustion efficiencies even at low loads.
  • Large heating surface and high efficiency burner, translates into large savings in fuel cost High quality fittings and components

See also: Enertech's Oldenburg Boiler

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