Flash Pyrolysis New
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Transcript of Flash Pyrolysis New
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Flash Pyrolysis
Bio oil production
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Description:
Pyrolysis is a form of incineration that
chemically decomposes organic materials by heat in
the absence of oxygen. Pyrolysis typically occurs
under atm pressure and at operating temperatures
above 430C (800
F).
Organic materials are transformed into gases, small
quantities of liquid, and a solid residue containing
carbon and ash. The off-gases may also be treated in a
secondary thermal oxidation unit.
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Types of pyrolysis Technologies
Pyrolysis technologies can be categorized as being of
two types:
SlowPyrolysis
FastPyrolysis (Flash Pyrolysis)
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Slow Pyrolysis
Feed stocks: Any Organic material
Pre-treatment: sorting
Qualifications: larger particles can be used and
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Fast Pyrolysis
Fast pyrolysis (Flash pyrolysis) takes place in lessthan two seconds with temperatures between 400 and
750 degrees Celsius.
Rapid thermal decomposition of organic compounds
in the absence of oxygen to produce liquids (bio oil),
char, and gas
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Dry feedstock:
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Advantages
Operates at atmospheric pressure and modest
temperatures (450 C)
Yields of bio-oil can exceed 70 wt-%
DisadvantagesHigh oxygen and water content of pyrolysis liquids
makes them inferior to conventional hydrocarbon fuels
Phase-separation and polymerization of the liquidsand corrosion of containers make storage of these
liquids difficult
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Bio-Oil
Pyrolysis liquid (bio-oil) from flash pyrolysis is a lowviscosity, dark-brown fluid with up to 15 to 20% water
Saccharides 3.3
Anhydrosugars 6.5
Aldehydes 10.1
Furans 0.35
Ketones 1.24
Alcohols 2.0
Carboxylic acids 11.0
Water-Soluble Total Above 34.5
Pyrolytic Lignin 20.6
Unaccounted fraction 11.4
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Fast Pyrolysis can be further categorized as
Ablative Fast Pyrolysis- pressure is applied to biomass to
increase speed of decomposition through use of centrifugal ormechanical force. Larger particles of biomass can be used in
this process.
Cyclonic Fast Pyrolysis- also called vortex fast pyrolysis,
separates the solids from the non-condensable gases andreturns them to the mixer.
Rotating Cone Fast Pyrolysis- uses a compact high intensity
reactor in which biomass of ambient temperature is mixed with
hot sand. Upon mixing with the hot sand, the biomassdecomposes into 70% condensable gases with 15% non-
condensable gases and 15% char.
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Bio oil Production unit
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In the above unit there are
Feeding machine for biomass and/or combination of
organic and inorganic material
Pyrolysis Reactor
Coal Combustor
Bio Oil Quencher
Air Cleaning System
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Thank u