Multi-stage pyrolysis systems for treating chlorine contaminated wastes

a pyrolysis system and waste technology, applied in the direction of combustion types, separation processes, lighting and heating apparatuses, etc., can solve the problems of contaminated dunnage wastes, production of harmful dioxins and furans, and contaminated dunnage wastes with chlorinated organic compounds, so as to minimize the possibility of the formation minimize the possibility of dioxins and furans, and minimize the effect of dioxins

Inactive Publication Date: 2007-08-07
CH2M HILL
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology helps remove harmful substances from solid materials by breaking them down into smaller particles called dusts. It also reduces the risk of forming dioxins and furans during decomposition. Additionally, it uses heat without oxidizing any other compounds like nitrates, which makes it safer than previous methods. Overall, these technical improvements help prevent damage caused by chemical weapons agents.

Problems solved by technology

This patent describes various methods for decompositing and disposing of chemical warfare munitions' spent ammunition material. These techniques involve burning it safely away without generating dangerous gases. However, current methods require expensive equipment and consume large amounts of fuel. There is a technical solution proposed in the patent to reduce the amount of pollution generated during decomposition processes.

Method used

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  • Multi-stage pyrolysis systems for treating chlorine contaminated wastes

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Embodiment Construction

[0012]A multi-stage pyrolysis apparatus 10 is illustrated schematically in the FIGURE. Located upstream from the multi-stage pyrolysis apparatus 10 is an optional dunnage processor 12 for processing and delivering dunnage to the multi-stage pyrolysis apparatus 10. The dunnage processor 12 includes an airlock chamber 14 containing a conveyor 16 for receiving wood products contaminated with chlorinated hydrocarbons, such as the pesticide pentachlorophenol. The airlock chamber 14 isolates the dunnage and possible harmful contaminates from the area of a building or grounds where it is located. It further limits transport of gas phase contaminants from one area to another. These contaminated wood products are combined with other contaminated or potentially contaminated wood from a wood supply 18 and conveyed by conveyor 20 to a shredder 22. The shredder 22 shreds the input wood material into small pieces suitable for further processing. The shredder 22 includes a magnetic separator 24 for s

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Abstract

A method of decontaminating solids contaminated with chlorinated hydrocarbons includes a first step of heating the contaminated solids at a temperature high enough to volatize chlorine contaminates but below a temperature range favorable to the formation of the dioxins and furans to dechlorinate the contaminated solids. Volatilized chlorine contaminates are removed from the dechlorinated contaminated solids. The dechlorinated contaminated solids are then purged with an inert gas to remove oxygen from the dechlorinated contaminated solids. Thereafter the dechlorinated contaminated solids are heated in the absence of oxygen to a temperature sufficient to crack hydrocarbons contaminating the solids to lower molecular weight hydrocarbons.

Description

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Claims

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Application Information

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Owner CH2M HILL
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