Combustion – Mixer and flame holder
Patent
1986-07-15
1988-02-16
Dority, Jr., Carroll B.
Combustion
Mixer and flame holder
431 4, 123 25A, F23D 1464
Patent
active
047252260
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a device for activating a combustion process and, more particularly, to such a process which increases the CO.sub.2 content and reduces the soot index in combustion systems supplied with solid, liquid or gaseous fuel.
When, in conjunction with combustion systems, reference is made to improving the quality of combustion, the intention is principally that the fuel consumption should be reduced and accordingly energy should correspondingly be saved. In addition to this aspect, however, in the case of modern systems the intention is also to give consideration to practical aspects from the technical point of view, such as easier and improved cleaning of the boilers and combustion chambers used, so as to remove soot and deposits, optimization of the energy exchange and output capacity, the achievement of a more favorable efficiency of the combustion system by changes to the flame geometry, reduction of the emission of fumes and solid particles, as well as elimination of possible causes of corrosion. The measures and devices which have to date become known for the improvement of the above-mentioned process and system components are in general associated with large capital expenditure, which is an obstacle to widespread application.
By the European Patent Application No. 50 258, a combustion catalytic unit is known, according to which a regulating device is disposed between a water container and a combustion zone. In the operation of this arrangement, there is the disadvantage that the pressure shocks occurring on ignition of the fuel and on switching over from one stage to the other are propagated to the buffer filling of the regulating device, so that buffer liquid passes into the water container.
From German Pat. No. 2,359,414, a device for the introduction of steam into the fuel feed system of an internal combustion engine is known, by means of which the efficiency of combustion of the fuel is to be improved and the emission of noxious substances is to be reduced. In this known device, the steam generated in a container is supplied through a hollow idling setting screw of the carburetor of the internal combustion engine. In order to provide protection against an undesired reverse flow or against misfire reactions from the carburetor, at one end section of the idling setting screw a ball retaining valve is provided, the valve ball of which is controllable alone by the gas current. Such a reaction system has only a slight protection value, and is accordingly clearly unsuitable for use in furnaces.
The object of the invention consists in particular in providing measures, with the avoidance of the disadvantages of the prior art in the device of the initially mentioned type, which permit the achievement of an activation, showing an overall improvement, of the combustion process and at the same time decisively optimize the operational security.
This object and other objects are achieved by replacing the combustion air required for the burner of a combustion system with a mixture of the ambient air which is conventionally employed and air which is activated by a device constructed in accordance with the present invention. By means of investigations of the fumes at the outlet of a boiler, it was established that this activation or enrichment of the total combustion air supplied causes a considerable reduction of fuel consumption with a comparably high output power. As regards the combustion process, it has become evident that the conventional excess of air could be reduced and thus the pyrotechnic efficiency could be increased and stabilized. Already after approximately 200 to 300 hours of operation of the burner of a boiler which had up to that time been operated conventionally, when the enrichment was commenced it was possible to observe a considerable self-cleaning effect in the combustion chamber, so that the conventionally occurring deposits of soot and combustion residues had virtually disappeared. Instead of this, there was a fine white layer, which could be removed without further ado
REFERENCES:
patent: 1997763 (1935-04-01), Boesch
patent: 3865907 (1975-02-01), Rock
patent: 3875922 (1975-04-01), Kirmss
patent: 4030456 (1977-06-01), Corpus
patent: 4144015 (1979-03-01), Berthiaume
patent: 4173450 (1979-11-01), Schrank
patent: 4376739 (1983-03-01), Passey
patent: 4538981 (1985-09-01), Venturini
European Patent Application 50 258, Apr. 1982, Inventor Andrea Venturini.
Balsiger Benno
Richina Primo D.
Balsiger Benno
Dority Jr. Carroll B.
Selitto, Jr. Ralph W.
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