Enertech Systems Industries, Inc. Innovation - Kaldera Integral


Product Overview

The Enertech Coal-fired Kaldera Integral Furnace Boiler incorporates a waterwall furnace in lieu of brick walls to increase efficiency. In this design where the boiler vessel sits on top of the furnace, a smaller area is required for the main boiler assembly, which is desirable when factory space is limited. Just like its bigger version Combi boiler design, converting from oil to coal firing using the Kaldera Boiler can drastically reduce fuel cost and the cost of investment is recovered in less than a year.

The biomass fired Kaldera is equipped with a reciprocating grate, a proven combustor for various biomass fuels, in which biomass is gently pushed down each step as it burns until only ash remains at which point it is dropped into the ash disposal chamber, where it is continuously discharged out of the furnace by screw conveyor.


  • Simple shell and tube boiler.
  • Capacity range of 10 to 400 Bo Hp up to 200 psi design pressure with either manual or automatic fuel feed system with bricks insulating furnace.
  • Capacities from 1.5 to 10 tons per hour and up to 20 Bars max. allowable working pressure.
  • Waterwalls on four walls of furnace to increase heat transfer through radiation.
  • Brickwalls at the lower portions of furnace to maintain high furnace temperature.
  • Waterwalls are of welded membrane wall tube panel design to prevent air intrusion.
  • Reciprocating Grate for efficient combustion of coal.
  • Choice of grate designs to suit budget and available fuel, such as Pinhole Grate, Semi Steep Grate, Reciprocating Grate, and Travelling Grate.
  • Complete combustion of solid fuels is assured by providing for the 3 T's of combustion (Time, Temperature and Turbulence) in the furnace design.
  • Choice of manual, semi-automatic and fully automatic boiler operation.
  • Enertech Brain ++ (boiler automation) provides fully automatic operation of the boiler assuring fail-safe operation while reducing the number of operating personnel.


  • Steam and hot water processes.


  • Pollution Control Equipment such as Multi-Cyclone Dust Collector, Bag House, Wet Scrubber, Electrostatic Precipitatro, etc.
  • Boiler House, equipment foundation, turnkey basis.

See also: Solid-fired Boiler


coal fired kaldera

career automechanic



oldenburg boiler