WHAT DO YOU HAVE TO BURN?

These Boilers are a complete
and fully integrated system that
come with all the necessary components:

3-Pass Firebox Boiler: designed and constructed to the ASME Boiler Code. Brand new 3-Pass firebox boiler with a large combustion volume for a maximum system efficiency.

Stoker Base: stoker walls are lined with approximately 12" high temperature insulation and poured refractory. Included is a chain grate cast from high heat resistant alloy.

Combustion Air Blower: volume of air delivered is directly proportional to the amount of fuel combusted on the chain grate. It is controlled by Variable Frequency Drive (VFD).

Multi-Screw Fuel Conveyor: it is designed to convey many various fuels some of which are wood, manure, ground corn stalks, sugar beets, construction waste, etc. and other similar types of solid fuels onto the chain grate in a metered, consistent manner. Fuel feed ratio is directly related to the power demanded by boiler's temperature control system.

2 Screw Fuel Conveyor: it is designed to convey coal and is used if coal is the only fuel to be used.

Automatic Ash Removal: the ash removal system is fully automated. It is designed to remove all the ash generated from the solid fuel combustion. Removal is from the stoker as well as the multi-clone system.

PLC Control Panel: designed to operate the stoker, twin-screw and multi-screw fuel conveyors, ash removal augers, combustion air and exhaust fan. Complete with 8" Color user interface touch screen.

Soot Blower: the function of the soot blower is to increase heat transfer efficiency. PLC controlled, it is programmed to clean the tubes at preset intervals.

Multi-Cyclone Dust Collector: the heart of the system is multi-cyclone design complete with exhaust blower, air lock and fly ash removal auger.

Automatic Pulsating, Soot Blower, Tube Cleaning System: Consists of a number of air jets, (one for each tube), mounted on the boiler directly in front of the boiler tubes. Its function is to maintain the fire tubes, cleaning at all times by introducing compressed air into the boiler tubes at pre-set intervals, thus increasing its heat recovery efficiency.

Time, Temperature and Turbulence: Our system design incorporates the three components required for efficient combustion of solid fuel. The combination of over-fire air and the air passing through the fuel bed provides turbulence required for rapid and complete combustion of solid fuel. The Chain Grate Stoker design has a significant advantage over other systems. The system provides a large area of the chain grate that is conservatively designed to assure a complete combustion of solid fuel.

The principal combustion and over fire design of the BFT Boiler gives you three distinct combustion controls.

1. Modulating Fuel Feed Rate
2. Modulating Air Flow Rate
3. Modulating Grate Speed Rate

The HOLD FIRE mode is used only during the periods of low heat demand. If the system reaches the set point temperature, the system will shut down. If the temperature remains at the set point for a long time, the system will start up at a pre-set time interval in order to maintain fire. The time interval is selectable by the user. For example, if the temperature during the day is 65° F, the fire will stay lit with no demand from the boiler. This is programmed in the Control Panel and is due to the full air flow coming up under the Chain Grate through the fuel. When the temperature lowers to 20° F at night, the boiler will meet that demand and promptly produce the heat that is needed. Our experience with a 100bhp, 150PSI steam boiler shows that the recovery time from the Hold Fire mode.

Standard plate grate boilers create several problems when removing the ash. Not only does the boiler have to be shut down and re-started, but the ash must be manually removed from the firebox to a container. When scraping, or shoveling the ash it creates a fine dust that settles on everything in the boiler room as well as an ash problem on the floor that needs to be cleaned up. Sweeping the ash off the floor also adds to the fine dust floating around the boiler room. With the Biofuel Boiler Technologies LLC Boiler System the ash box is outside which allows your boiler room, walls, ceiling, and floor to stay very clean.