Stoves and furnaces – Grates – Agitating
Patent
1986-03-13
1987-09-15
Yeung, James C.
Stoves and furnaces
Grates
Agitating
126181, F23H 904
Patent
active
046932348
DESCRIPTION:
BRIEF SUMMARY
The invention is directed to an apparatus for burning and/or thermally decomposing fuel especially solid fuels.
When solid fuels are burned and/or thermally decomposed on a grate it is unavoidable that due to fuel and/or slag deposits or the like the grate will become clogged in the course of operation, resulting in a steadily decreasing efficiency. This problem has been recognized for decades in the case of smaller coal and/or wood-burning ovens. It is therefore necessary for maintaining combustion to free the oven or furnace grate from time to time from deposited residues of combustion or the like by means of a stoker or the like. There are also ovens or furnaces that are provided with vibratory grates. These measures cannot be employed, however, in large heating installations, and moreover they would be of little effect.
The present invention is based on the subject of providing an apparatus and a method of the above-specified kind in which undesired clogging of the grate can be reliably prevented, while at the same time good control of the combustion process or the thermal decomposition shall be achieved.
The invention ensures that the furnace grate is kept free from deposited fuel and/or slag material or the like in dependence on the preset relative movement between the grate and the loosening and/or cleaning means. There is no risk of undesired clogging or sintering of the grate due to ash, slag, non-combusted or partially combusted fuel. At the same time, the degree of combustion or thermal decomposition, respectively, can be effectively controlled in accordance with the preset degree of opening of the burning grate. The extent of relative movement between grate and loosening and/or cleaning means determines the combustion-active area of the burning grate, which correspondingly influences the degree of combustion or thermal decomposition, respectively.
Due to the measures in accordance with the invention it is also possible to considerably reduce the size of the furnace installation, because a substantially smaller burning grate as compared to burning grates of conventional furnace installations is required to achieve a comparable degree of combustion or thermal decomposition. This means that the invention can also be used to advantage for smaller furnace installations such as single-family units or multifamily buildings. The invention is especially effective for the combustion of refuse such as domestic refuse or similar hardly combustible or thermaly decomposable materials.
The invention not only provides that the grate is kept open for purposes of sufficient air supply, but at the same time the materials placed on the grate are simultaneously revolved and thus subjected to more effective combustion.
Preferred embodiments of an apparatus according to the invention shall be described in detail below with reference to the accompanying drawing, in which:
FIG. 1 is a schematic perspective view of an apparatus according to the invention,
FIGS. 2a-2c illustrate the swinging grate of FIG. 1 in a schematic front view and in three different positions relative to a material loosening and grate cleaning means,
FIGS. 3a-3c illustrate a front view corresponding to FIGS. 2a-2c of a further embodiment of a grate according to the invention in correlation to a material loosening and grate cleaning means, and
FIGS. 4a-4c illustrate a front view corresponding to FIGS. 2a-2c and 3a-3c, respectively, of a further embodiment of a burning grate according to the invention in correlation to a material loosening and grate cleaning means.
The apparatus for burning and/or thermally decomposing especially solid fuels such as peat, coal, wood, straw or refuse as illustrated in FIG. 1 comprises a tubular fuel supply pipe 1 and a primary air supply means 4 for supplying primary air to a basket-like bar grate 2 having correspondingly curved grate bars 5. This bar grate 2 defines the site of combustion of the mentioned fuels. The primary air supply means 4 is disposed at the underside of the bar grate 2 or the side thereof opposit
REFERENCES:
patent: 371246 (1887-10-01), Bostwick
patent: 1694211 (1928-12-01), Fernandez
Stubinen Utveckling AB
Yeung James C.
LandOfFree
Apparatus for and method of burning and/or thermally decomposing 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 and method of burning and/or thermally decomposing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for and method of burning and/or thermally decomposing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1378490