Flash Pyrolysis New

8/13/2019 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

Flash Pyrolysis New

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