Liquid heaters and vaporizers – Miscellaneous
Patent
1988-02-16
1989-01-03
Favors, Edward G.
Liquid heaters and vaporizers
Miscellaneous
110203, 16510416, 16510418, 165 39, F23B 100
Patent
active
047948825
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method of operating a combustion plant including a reactor having a combustion chamber wherein heat is transferred from a fuel to a granular medium, and wherein a portion of the heated medium during operation is discharged from the combustion chamber of the reactor and supplied to a heat producing heat exchanger. Further, the invention relates to a combustion plant for operation in accordance with the method.
A method of the above-mentioned type is known from Norwegian patent specification No. 143 643. The patent specification discloses a method and an apparatus for operating a fluidized-bed incinerator, wherein the fluidized-bed incinerator has a combustion chamber containing a fluidized-bed medium which is heated during combustion of fuel in the combustion chamber. A portion of the hot fluidized-bed medium is discharged from the combustion chamber and supplied to a separate heat exchanger, and after cooling in the heat exchanger the medium is returned to the fluidized bed of the combustion chamber.
This method is advantageous in that the temperature of the fluidized bed can be maintained at a suitable value, and further the temperature in the zone above the fluidized bed and consequently the exhaust gas temperature can be reduced. However, a heat-producing combustion plant which should operate in accordance with this known technique, would be limited to the maximum heating effect which can be delivered by the heat exchanger. In case of a larger power demand one would be dependent on other facilities, such as oil boilers or electrical boilers, in order to deal with e.g. peaks in the power consumption.
It is an object of the invention to provide a method and a heat-producing combustion plant making it possible for the combustion plant to be built with a power capacity which is equal to the average value of the power consumption over a time period, at the same time as--when peaks in the power consumption occur--more power can be delivered with the utilization of accumulated heat energy.
Another object of the invention is to provide a method and a plant which can produce heat with a steady power over the entire year, and which can store the heat in a part of the heated medium during that part of the year when the power consumption is lower than the power production, and wherein the heat of the hot medium can be used as a supplementing power production in that part of the year when the steady power production is too small to cover the power demand.
The above-mentioned object is achieved with a method of the introductorily stated type which, according to the invention, is characterized in that a part of the discharged hot medium is transferred to a separately provided, insulated store for accumulating the heat in the medium, and the hot medium subsequently, and according to requirement, is supplied from the store to one or more additional heat exchangers for supplementing the heat production of the first-mentioned heat exchanger.
The combustion plant which is provided according to the invention, includes a reactor having a combustion chamber with a granular medium contained therein which is heated during the combustion, and a heat exchanger which is connected to the combustion chamber and is arranged for through-flow of hot medium which is discharged therefrom, and is characterized in that it includes an insulated storing means which is connected to the combustion chamber of the reactor and arranged to receive and store hot medium discharged from the combustion chamber, to accumulate the heat therein, and one or more additional heat exchangers which are connected to the storing means to be supplied with stored, hot medium therefrom, in order to supplement, when required, the heat production of the first-mentioned heat exchanger.
With the method and the plant according to the invention a number of substantial advantages are achieved. Some of these can be summarized as follows: output. consumption. operational period. plant, power then being taken from the store. combustion pla
REFERENCES:
patent: 4111158 (1978-09-01), Reh et al.
patent: 4158385 (1979-06-01), Vandenhoeck
patent: 4704084 (1987-11-01), Lun et al.
Favors Edward G.
Santo A/S
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