Thermal Desorption: Difference between revisions
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[[Thermal Desorption]] Thermal is a treatment process whereby heat is applied to materials, such as waste soils, [[sediments]], [[slurries]] and [[filter cakes]], in order to remove (vaporise) volatile contaminants (e.g. [[oils and solvents]]). Along with such volatile contaminants, thermal desorption will also vaporise water contained within the material and therefore a thermal desorption plant also functions, and may be referred to, as a “dryer”. A schematic of a typical indirect thermal desorption process is summarised in Figure 1 below<ref | [[Thermal Desorption]] is described in the [[EA]] guidance 382_12 as ''a treatment process whereby heat is applied to materials, such as waste soils, [[sediments]], [[slurries]] and [[filter cakes]], in order to remove (vaporise) volatile contaminants (e.g. [[oils and solvents]])<ref name='EA'>[https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/300893/geho0512bwir-e-e.pdf [[EA]] Guidance 382_12 (an addendum to Guidance S5.06)]</ref>. | ||
==Overview== | |||
[[Thermal Desorption]] is described in the [[EA]] guidance 382_12 as ''a treatment process whereby heat is applied to materials, such as waste soils, [[sediments]], [[slurries]] and [[filter cakes]], in order to remove (vaporise) volatile contaminants (e.g. [[oils and solvents]]). Along with such volatile contaminants, thermal desorption will also vaporise water contained within the material and therefore a thermal desorption plant also functions, and may be referred to, as a “dryer”. A schematic of a typical indirect thermal desorption process is summarised in Figure 1 below''<ref name='EA'/>. | |||
[[File:EA Thermal Desorption Diagram.png|500px|center|EA Thermal Desorption Diagram from Guidance 382_12 : All rights reserved]] | [[File:EA Thermal Desorption Diagram.png|500px|center|EA Thermal Desorption Diagram from Guidance 382_12 : All rights reserved]] | ||
This guidance provides greater detail to the overarching Sector Guidance Note IPPC S5.06<ref>[https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/298118/LIT_8199_dd704c.pdf Guidance for the [[Recovery]] and [[Disposal]] of [[Hazardous Waste|Hazardous]] and [[Non-Hazardous Waste]]]</ref> | |||
==Types of Thermal Desorption Systems== | |||
There are two principle types of approach to introducing heat to the process - either through direct application of heat or indirect application of heat. Sources of indirect heat include natural gas or oil fired burners, thermal oil, electrical (eg infra-red or microwave) and friction<ref name='EA'/>. | |||
Operation mode can be either a batch (ie as a sealed oven) or continuous (ie rotary kiln design)<ref name='EA'/>. | |||
==References== | ==References== | ||
<references /> | <references /> | ||