WELLONS is the only company manufacturing wood-fired boilers with a furnace grate and a unit output of up to 120 MTH of high-pressure steam. These boilers require no auxiliary fuel (fuel oil or fuel gas) for operation. For this reason, our technology is constantly compared with the method of wood waste combustion in fluidized bed boilers. In the article "OPERATION PRINCIPLE AND DESIGN FEATURES OF WELLONS BOILERS" we focused on the description of technological features and advantages of our systems where a patented technology of wood fuel combustion on rotary grates in vortex/cyclone-type furnaces is used. (WELLONS, INC. know-how).
In this review, we want to draw your attention to a number of disadvantages inherent in the technology of wood fuel combustion in a fluidized bed. These are as follows:
The use of auxiliary burners on Wellons boilers is not necessary. For example, such burners for gaseous fuels were installed at JSC "Solikamskbumprom", however after the boiler commissioning these burners have never been used, even when a fuel mixture of BW/sludge in a ratio of 1:1 (50:50) was utilized. On request, we install auxiliary burners, which ensure the maintenance of boiler parameters (characteristics, performance) and put our system on an equal footing with the fluidized bed plant when choosing the boiler running on wood waste/fuel.
We are always pleased to introduce your staff to Wellons boilers operation. All the professionals that operate our boilers, point out to the simplicity of design, reliability, possibility of incinerating/recycling sludge deposits with high humidity content (up to 70%), extremely low operation cost, excellent technical solutions from the design of furnaces to ash handling systems, low metal intensity of its structure, workmanship etc. Example of "Solikamskbumprom" shows a lack of large expenditures on the operational needs of the boiler itself – after 15 years of heavy operation no replacement of grate rolls is required; the original lining of furnaces and boilers, installed at the boiler commissioning still remains intact.
We hope this brief information will allow you to better understand the technology of burning all kinds of waste wood on our systems compared to fluidized bed technology and use a more balanced approach to choosing a boiler systems for your projects. By choosing Wellons boiler you insure yourself against the disadvantages of other systems.