Furnaces – Combined
Patent
1990-09-18
1992-04-14
Favors, Edward G.
Furnaces
Combined
110165R, 110235, 110258, 110259, 110285, 110309, 126152B, F23B 700
Patent
active
051037440
DESCRIPTION:
BRIEF SUMMARY
The present invention is directed to an apparatus for the combustion and/or decomposition of fuel by heat, especially of solid fuels such as peat, coal, wood, straw or garbage, as specified in the preamble of claim 1.
When solid fuels are combusted and/or decomposed by heat on a bar grate it is inevitable that the grate will become clogged by the deposition of fuel and/or slag or like materials in the course of the process, thus resulting in an increasingly poorer efficiency. This problem has been known for decades in connection with smaller coal or wood stoves. Therefore deposited residues of combustion must be removed from the grate from time to time by means of a poker or the like so as to maintain combustion.
There also exist furnaces which are provided with vibratory grates for the said purpose. However, with major heating installations these measures cannot be adopted. Besides, they have only little effect.
DE-A-116,441 discloses a vibrating cage grate which is characterized in that stationary prongs engage within the interstices of the grate to break up the deposited slag during the movement of the grate. However, the prongs are effective only acorss a part of the cage grate so that the efficiency of the known structure is correspondingly limited. Moreover, it has been found that the bars of the grate become distorted due to local thermal stresses and consequently the stationary prongs rub against the grate bars and in extreme cases may even block the vibrations of the grate. Moreover, the bars of the grate are made from solid material so that they are particularly susceptible to thermal stresses.
In order to eliminate the specified problems it has been proposed in DE-C-3,418,864 that the material loosening means engaging in the interstices of the grate should be mounted with some clearance, i.e. it should be movable with respect to the bars of the grate. Thereby any blocking of the vibratory grate due to distortions of the grate bars as caused by heat is largely prevented, and combustion is correspondingly promoted The risk of clogging of the bar grate is considerably reduced.
In order to reduce the above-mentioned distortions of the grate bars it has also been proposed to configure the same in the form of pipe lengths through which a cooling medium, especially air, is passed (DE-A-3,334,024 and DE-A-3,149,548). However, under extreme conditions these measures are insufficient to ensure unobstructed relative movement between the grate bars and the material loosening means In such a case the additional measures as specified in DE-C-3,418,864 have been found to be indispensible.
The present invention is based on the object of further improving the structure according to DE-C-3,418,864 in such a way that the material loosening means, which are subject to considerable wear, can easily be exchanged or can be replaced by material loosening means of a different kind.
The specified object is solved by the characterizing features of claim 1. Accordingly, it is readily possible to exchange the material loosening means without having to dismantle the bar grate structure, especially the support members for the material loosening means, or to replace them by material loosening means of a different kind. Also, it is possible to vary or change the number of material loosening means used while dismantling of the afore-mentioned arrangement or support member is not required. In accordance with the invention, the material loosening means in the form of disks or plates are fitted in an extremely simple manner on the support member which extends beneath the grate bars and is configured as a support rod of essentially rectangular cross-section, so that said disks or plates are individually displaceable in the direction of the support rod. Accordingly, fitting of the material loosening disks to the support rod is effected with sufficiently large play.
Preferred structural details of the material loosening disks according to the invention are described in claims 2 and 3.
When grate bars in the form of pipe lengths are us
REFERENCES:
patent: 4796544 (1989-01-01), Overgaard
patent: 4884516 (1989-12-01), Linsen
patent: 4895084 (1990-01-01), Kroon et al.
patent: 4901653 (1990-02-01), Baltzinger
LandOfFree
Apparatus for the combustion and/or decomposition of fuel by hea does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for the combustion and/or decomposition of fuel by hea, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for the combustion and/or decomposition of fuel by hea will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2341908