Device and method of inerting toxic materials by plasma melting
A plasma and plasma source technology, applied in the field of devices and methods for inactivating toxic materials through plasma melting, can solve the problems of long residence time of waste materials, imperfection, and insufficient life of refractory materials, and achieve the elimination of dioxide and furan The generated effect of
Active Publication Date: 2013-04-17
欧罗等离子公司
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- Application Information
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Problems solved by technology
Although commercially developed deactivation targets have been met, construction and operational difficulties have been noted, particularly insufficient refractory life, as well as fluctuations in gas-phase flow rates associated with vaporization of organic matter from each incoming waste-containing bag. resulting in the often imperfect fittings of the method
It has also been found that the residence time of the waste to be processed in these thermal plasma stations is often very long
Method used
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Embodiment Construction
[0076] figure 1 A partial cross-sectional view of a plasma melting deactivation device according to a particular embodiment of the present invention is shown. The apparatus comprises a cylindrical melting chamber or furnace 1 . However, the melting chamber can also have any other shape, for example oval.
[0077] The melting chamber 1 is supplied continuously upstream via an injection element 2 with a stream of asbestos-containing comminuted solids. The pulverized charge 5 to be processed can be injected into the melting chamber 1 by an inlet 3 formed by a circular cross-section opening provided in an inlet positioned in a side wall 4 of the melting chamber 1 .
[0078] The control flow (flux )'s ability to choose to inject part 2. For example, a cooling screw 2 can be used. Injection via pushrod or pressure pneumatic delivery is also available as an option.
[0079] The pulverized charge 5 injected into the melting chamber 1 falls into the molten bath 6 by gravity. Th...
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Abstract
The present invention pertains to a process and an device for plasma fusion inertizing of toxic materials, consisting of a melting vessel having an internal volume defined by walls. At least one non-transferred arc plasma source intended to generate a lance of plasma is inclined toward the lower part of the melting vessel and propagated along an axis of propagation situated outside of the vertical plane containing the normal to the wall at the point of intersection of said propagation axis with said wall so as to agitate the melting bath. The melting vessel is in fluid communication with the upstream part of a refining and pouring vessel and consists of an opening to which a non-transferred arc plasma source is connected, said source being mounted so as to emit a plasma lance to strike the refining bath directly in said upstream part.
Description
technical field [0001] The present invention relates to a device and a method for deactivating toxic products, in particular waste materials including asbestos, by plasma melting. Background technique [0002] It is well known that asbestos-containing waste, especially from building demolition, is of mixed nature. In particular, these waste materials may also include mineral, metallic, plastic or other combustible substances as well as varying amounts of water. [0003] Many attempts have been made to deactivate asbestos-containing materials or materials containing asbestos. [0004] In these attempts, the stabilization before discharge was citered by diluting the asbestos fibers and asbestos dust in a large volume of hydraulic binder and then drying the mass thus obtained. However, this deactivation method raises questions regarding the long-term stability of the material obtained, which is uncertain. [0005] Also known from the patents EP 0 484 866 and EP 0 344 563 are...
Claims
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IPC IPC(8): B09B3/00C03B5/00
CPCC03B5/202C03B5/005C03B5/025B09B3/0083B09B3/0066B09B3/40
Inventor L·克莱尔-罗克F·E·L·布吕内托J-P·罗伯特-阿尔努伊
Owner 欧罗等离子公司