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Process and Operating Advantages
Whatever the process application, the BSP Multiple
Hearth Furnace system offers significant  advantages. It provides
intimate solid-gas contact, maintains close temperature control, handles a wide
range of feed materials, and yields uniform operating conditions and consistent
results.
Fuel Efficiency
Heat transfer occurs through direct flame radiation and material/gas contact.
Hot gases from combustion rise counter-current to the flow of material. Contact
between the gas and feed occurs across every hearth and during drops from hearth
to hearth. Fuel efficiency typically improves with the number of hearths used.
Recycling of shaft air and heat recovery exchangers can be utilized to further
improve fuel efficiency.
Process Time
Processing is controlled by the speed of the shaft. The shaft is driven through
a variable speed drive which can be automated to change speeds with variations
in feed moisture or weight.
Multi-Zone Operation
Each hearth forms a distinct chamber where process conditions can be varied.
Heat, steam, and reducing agents can be selectively applied to control a
process. Multiple process steps such as drying, calcining, incinerating and
cooling can be performed simultaneously in the same furnace.
Controls
BSP's advanced instruments and control techniques provide maximum system
performance. All critical conditions affecting furnace operation can be
automatically monitored and controlled to prevent costly downtime.
Flexibility
One of the salient features of the Multiple Hearth
Furnace is its ability to handle a wide variety of materials varying
physical and chemical characteristics. Another is its ability to utilize many
fuels, including natural gas, reform gas, propane, butane, oil and coal dust, as
well as waste oils and solvents.
It also can handle continuous or intermittent operating modes and can be
designed with up-draft, down-draft or cross-draft flow patterns to provide
optimum process atmospheres. | |
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BSP's rugged thermal systems provide the most
cost effective
performance
across a wide range of processes.
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BSP Thermal Systems, Inc. continues to provide quality leadership in multiple hearth furnace design and technology.
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