Power plants – Combustion products used as motive fluid – Combined with regulation of power output feature
Patent
1995-01-10
1997-01-07
Casaregola, Louis J.
Power plants
Combustion products used as motive fluid
Combined with regulation of power output feature
60 395, F02C 700
Patent
active
055905196
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a combined combustion and exhaust gas filter plant.
Such plants are already known and have in practice performed well. The filtering degree can be made extremely high and plants of this kind need little space, which is important during the conversion of existing plants. All steps for achieving this have been concentrated on the filter process itself. However, it has been shown to possibly achieve further improvements by a better matching of the combustion means and the expansion gas filter plant.
SUMMARY OF THE INVENTION
Therefore, it is the purpose of the invention to achieve further improvements of the filtering effect and the space requirements for a combined combustion and exhaust gas filter plant.
The combined combustion and exhaust gas filter plant of the present invention includes a combustion chamber (5) for pressurized combustion of combustible substances, a supply device (3, 8) for supplying up to 100 percent oxygen enriched combustion air to the combustion chamber (5), and a scrubber (10, 12) for pressurized cooling and washing with water of exhaust gases produced by the combustion chamber (5). The scrubber (10, 12) separates environmentally endangering materials and other contaminants from the exhaust gases and includes a deducting device for deducting the washing water and the environmentally endangering materials and other contaminants captured, dissolved or condensed in the washing water. An expansion device (14, 20) is coupled to the scrubber (10, 12) and expands remaining exhaust gases in one or more steps such that a sufficiently low temperature is achieved at an output of the expansion device (14, 20) for condensing remaining environmentally endangering materials and other contaminants contained in the remaining exhaust gases. A separating device (16, 22) is coupled to the expansion device (13, 20) for separating the condensed remaining environmentally endangering materials and other contaminants from the remaining exhaust gases and for collecting the condensed remaining environmentally endangering materials and other contaminants in solid or liquid form. A pump (27) is coupled to the separating device (22) for sucking out the remaining exhaust gases from the separating device (22) at a predetermined pressure close to 0 bar.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic drawing of a combined combustion and exhaust gas filter plant according to the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The present invention connects the combustion chamber in a combined combustion and exhaust gas filter plant beginning to a means for the supply of combustion air enriched up to 100% with oxygen gas and connects a separating means to a vacuum pump or similar for the disposal by pumping of the small amounts of not condensed gases being accumulated in the separating means after the last expansion step.
Combustion air contains four parts of nitrogen on one part of oxygen as well as some minor quantities of other substances. The combustion is relying on the presence of sufficient quantities of oxygen, whereas the nitrogen only has a negative influence. On one hand, the nitrogen is creating a number of dangerous substances during the combustion and on the other hand the gas mass is heavily increased. Already an increase of the oxygen of up to two parts oxygen for three parts nitrogen is decreasing the required combustion air to a half. Pure oxygen would result in a compressor effect being 80 percent less. The heavily decreased volume of combustion air makes it possible to essentially limit the size of the combustion chamber. The temperature in the combustion chamber will rise as the same amount of energy is set free during the combustion. The temperature rise can be balanced by means of larger heat accumulating areas and increased heat radiation.
On the exhaust gas filter side an extremely pure exhaust gas can be achieved, the content of nitrogen being possibly reduced in the combustion chamber. Otherwise, differ
REFERENCES:
patent: 3736745 (1973-06-01), Karig
patent: 4392871 (1983-07-01), Almlof et al.
patent: 4434613 (1984-03-01), Stahlby
patent: 4498289 (1985-02-01), Osgerby
Almlof Goran
Lilliehook Folke
Bal AB
Casaregola Louis J.
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