Combustion – Process of combustion or burner operation – Heating feed
Patent
1998-05-19
1999-12-07
Lazarus, Ira S.
Combustion
Process of combustion or burner operation
Heating feed
431 5, 431 7, 431170, 165 4, 137309, 137311, 110147, 110163, 110211, 432250, F23D 1144, F23L 1502, F23L 100, F16K 1100, C08J 517
Patent
active
059972777
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The subject invention relates generally to a method and a device for recovery of energy from media containing combustible substances even at low-concentrations, and more particularly to energy recovery in connection with the purification of said media by combustion of the combustible substances.
It is already known to purify exhaust fumes emanating for instance from painting and printing works and containing combustible substances, such as solvents, by heating the fumes up to the temperature of combustion of the combustible substances. However, this is an expensive process on account of the need to heat the entire flow of the exhaust medium. Owing to a "combustion exchanger", one embodiment of which is described for instance in connection with an absorption technique in the Swedish Patent Specification 8903556-2, it is possible to reduce the costs associated with heating the exhaust fumes. In said Patent Specification the combustion exchanger is defined as an apparatus comprising a heat-accumulating bed which may be heated up to the spontaneous combustion temperature of the combustible substances and in which bed the combustible substances, by reversing their direction of flow, attribute to sustaining the spontaneous combustion temperature inside the bed. An apparatus of this type is described also in e.g. U.S. Pat. No. 4,741,690. When certain amounts of the combustible substances are present in the medium the heating of the medium inside the combustion exchanger may take place by the energy released from the spontaneous combustion of the substances inside the bed. Supplementary heating thus becomes necessary only to heat the bed to the spontaneous combustion temperature when the plant is being started up or when the quantity of combustible substances is very small and insufficient to independently sustain the spontaneous combustion temperature inside the bed.
Owing to the high efficiency of the combustion exchanger it is, however, comparatively rare that the amount of combustible substances in the medium is insufficient, as in the latter case mentioned above. Thus, the amount of combustible substances usually is in excess of the amount required to sustain the spontaneous combustion temperature inside the bed. This leads to an increase of the heat in the bed, which in turn results in an increased demand for cooling of the bed in order to avoid damages thereto and to the surrounding area. In addition, the fact that the thermal energy developed in the combustion is not recovered is a problem as such, considering the high energy costs and environmental aspects.
SUMMARY OF THE INVENTION
One purpose of the subject invention therefore is to provide a method and an apparatus allowing the surplus of thermal energy generated in the combustion in a regenerative combustor, i.e. a reversal flow direction combustion device wherein the combustion takes place in a warm zone, which preferably is a combustion exchanger, to be made use of.
Another purpose of the method and the apparatus according to the invention is to provide not only energy recovery but jointly therewith control of the temperature in the regenerative combustor.
Another purpose of the method and the apparatus according to the invention is to eliminate toxic or climate-endagering or malodorous substances by burning them.
Yet another purpose of the invention is to recover, from the regenerative combustor, thermal energy of such a quality that it may be used primarily for high temperature output, for instance in the production of electricity.
These and other purposes are achieved in accordance with the invention by means of a method and an apparatus defined in the characterizing clauses of the appended claims.
One embodiment of the subject invention will be described in closer detail in the following with reference to the accompanying drawings, wherein:
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 schematically in a view from above illustrates an apparatus in accordance with the invention for purification of exhaust or ventilati
REFERENCES:
patent: 4085593 (1978-04-01), Larsen
patent: 4116005 (1978-09-01), Willyoung
patent: 4741690 (1988-05-01), Head
patent: 4779574 (1988-10-01), Nilsson et al.
patent: 4811696 (1989-03-01), Lacquement et al.
patent: 5186901 (1993-02-01), Bayer et al.
patent: 5236354 (1993-08-01), Goldbach et al.
Heed Bjorn
Kallstrand .ANG.ke
Bittman Mitchell D.
Lazarus Ira S.
Lee David
Lemack Kevin
Megtec Systems AB
LandOfFree
Method and a device for recovery of energy from media containing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and a device for recovery of energy from media containing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and a device for recovery of energy from media containing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-817261