Method for the thermal dedusting of regenerative afterburning systems without the release of contaminants and without interruption of the main exhaust gas stream
OwnerJohannes Schedler, Heimo Thalhammerinventors
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Abstract
The invention relates to a method for the automatic and energy-saving dedusting of organic deposits on heat exchangers of regenerative afterburning systems without secondary emissions. Through a special guiding of the exhaust gas, the partial exhaust-air stream is returned without interruption of the main exhaust gas stream from the tower to be burnt off completely into the crude gas (FIG. 1). With this, the entire system is returned without any additional operations again into the original clean initial state and the burdening of the atmosphere is avoided.
Claims7
A method for thermally dedusting components of a regenerative afterburning system without the release of contaminates, comprising the steps of:
- providing an afterburning system with at least three regeneration towers that are connected to a common combustion chamber, wherein each said regeneration tower is filled with ceramic components;
- employing at least two of said regeneration towers in a crude gas cleaning process by supplying a first one of said regeneration towers with crude gas to be cleaned, burning the crude gas in the combustion chamber to obtain clean gas and drawing the clean gas through a second one of said regeneration towers and cyclically alternating the process so that crude gas is supplied to the second said regeneration tower and the clean gas is drawn through the first said regeneration tower;
- heating the at least one remaining regeneration tower so that contaminants on the ceramic components are burned off into an exhaust gas by forcing a stream of heated air from the combustion chamber into the at least one remaining regeneration tower;
- drawing the exhaust gas from the at least one remaining regeneration tower and mixing the exhaust gas with the crude gas that is supplied to the at least two regeneration towers;
- allowing the temperature of the at least one remaining regeneration tower to rise to between 400.degree. and 600.degree. C.;
- and
- cooling the at least one remaining regeneration tower with the clean gas produced by the afterburning system.
Dependencies are inferred from the claim text.