Infrasound generator for enhancing the combustion of solid fuels

Abstract

The invention refers to an infrasound generator for enhancing the combustion of solid fuels burning in a combustion chamber. The infrasound is generated by one or more set(-s) of each two vibrating plates, vibrating in the same direction with the same displacement amplitude but in antiphase. The infrasound generator does not cause vibrations and is not sensitive to ash and heat from the combustion.

Claims

1. An infrasound generator for enhancing the combustion of solid fuels (2) burning in a combustion chamber (1), equipped with a vertical down pipe (4) characterized in that said infrasound generator comprises one or more set(-s) of each two vibrating plates (7), each of said vibrating plate (7) of said set, situated parallel to each other, vibrating in the same direction with the same displacement amplitude but in antiphase and that each vibrating plate (7) is connected to a sound chamber (6) and that said down pipe (4) is situated between said sound chambers (6) and that there are connections (8) for the flow of infrasound between said sound chambers (6) and said down pipe (4) and that there are flaps (9) in front of the connections (8) preventing ash particles from the combustion to enter into the sound chambers (6).

2. An infrasound generator according to claim 1 characterized in that the connections (8) between said sound cambers (6) and said down pipe (4) have no pockets where ash particles can fill up.

3. An infrasound generator according to claim 1, characterized in that the frequency of the sound generated by said infrasound generator is between 7 to 19 Hz.

4. An infrasound generator according to claim 3 characterized in that the frequency of the sound generated by said infrasound generator is between 11 to 16 Hz.

Description

(1) The present description is now to be explained more closely by means of embodiments, which are disclosed as examples, and with reference to attached drawings.

(2) FIG. 1 is a cross sectional sketch of the infrasound generator and the combustion chamber.

(3) FIG. 2 is a side view of FIG. 1.

(4) FIG. 1 shows a combustion chamber (1) containing solid fuel (2) supported by a grate (3).

(5) A vertical down pipe (4) connects the combustion chamber (1) to the ash pot (5).

(6) The figure also shows a set of two sound chambers (6) situated opposite each other at each side of the down pipe (4). Vibrating plates (7) are mounted at each of the sound chambers (6).

(7) There are connections (8) for the flow of infrasound between the sound chambers (6) and the down pipe (4).

(8) There are flaps (9) preventing ash from the combustion to enter the sound chambers (6) via the openings (8).

(9) The benefits of this invention are: The set(-s) of two plates (7) vibrating in the same direction with the same displacement amplitude but in antiphase does not cause vibrations. It is possible to generate a high acoustic power due to the fact that the design includes two or more vibration plates (7). The flaps (9) prevents ash particles from the combustion to enter into the sound cambers (6). The connections (8) have no pockets that could be filled by ach particles. There is a long distance from the burning solid fuel (2) to the vibrating plates (7) via the connections (8).