Combitherm-Three Pass Smoke Cum Water Tube Type Boiler

From: Thermodyne Engineering Systems
Published: Sun Sep 10 2017

Combitherm Boiler is a unique membrane design water wall type boiler which combines the advantages of both water tube & smoke tube steam boilers. The radiation zone of the furnace is covered on three sides by wall of water tubes forming the first pass and the conventional smoke tube shell has tubes lined up forming the second and third pass of flue gases. Thus, the water wall furnace recovers the radiation heat of the furnace and the smoke tube shell provides large water & steam holding capacities to give the maximum advantage.
Combitherm Working

Water is fed to the boiler from a feed pipe connection. Firstly the water fills in the shell and then gets transported to the Bottom Header of water wall from the Down-comers welded to the Boiler Shell. From here the water rises up in the tubes of water wall and gets thrown back to the boiler shell from the top header. As firing is done in the furnace, because of radiation the surface temperature of water wall membrane rises and the water present in the tubes gets heated up and starts getting converted to steam. Now this steam, being lesser dense (creating natural circulation of steam-water in the system), rises up to the top header and gets to the Boiler Shell. The flue gas from the furnace (1st pass), travelling in the membrane, then enters the tube of Boiler Shell (2nd pass) and again after reversal (3rd Pass), now its smoke tube’s turn to generate steam from this flow .Steam coming from both the sides gets collected at the top of the Boiler shell and then supplied through steam lines for desired process application.

3 Pass Smoke Cum Water Tube Boiler design can burn a variety of fuels like Coal, Lignite, Rice Husk, Wood, Bagasse, Groundnut shells, and several other fuels thus providing you with lowest energy costs depending upon the fuel availability in your area.


Flexibility of fuels with choice of agro waste fuels
Combines the advantage of both water tube and smoke tube designs
High thermal efficiency and low operating costs
Higher degree of Equipment’s Reliability
Dependable quality of components like valves, pumps, safeties & instruments
Can be converted to liquid / gaseous fuels as well
Heat recovery unit may be offered for enhanced efficiency
Easy access for cleaning and inspection

Capacity Range:

Combitherm Boiler, Membrane water-wall type boiler is available in capacities from 1 TPH to 15 TPH.
Fuel: Coal, Lignite, Rice Husk, Wood, Bagasse, Groundnut shells, and several other fuels etc.
Company: Thermodyne Engineering Systems
Contact Name:
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Contact Phone: 8745001550

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