FI64713B - FITTING FOR FASHION BRAENSLEN FRAON ETT BRAENSLEFOERRAOD - Google Patents

Description

1 64713

Device for feeding solid fuels from a fuel depot

The present invention relates to an apparatus for feeding solid fuels from a fuel depot, which apparatus consists of a reciprocating scaled transfer plate located in an approximately horizontal trough 10 connected to a lower part of the fuel depot with ramps through which the fuel depot narrows.

The use of horizontal scaled transfer plates in fuel feeders is well known, cf.

15, for example, Finnish patent application 731249. It is characteristic of such scaled transfer plates that they reciprocate in the transverse direction of the scales, whereby the fuel, due to the triangular shape of the scales, follows the transfer plate mainly only in the other direction.

20 Solid fuels are unloaded from the lower end of fuel silos, e.g. with the aforementioned scaled transfer plates. The bottom of the silo then has a transfer plate which pushes the fuel flowing downwards by gravity towards the opening on the side of the silo. One problem often encountered in this connection is the vaulting of the fuel, as a result of which the fuel stack does not reach up to the transfer plate, whereby the transfer plate cannot fulfill its function. Vaulting occurs especially in silos with a tapered bottom.

It is an object of the present invention to provide a device which effectively prevents fuel from vaulting in a downwardly tapering silo. This object is achieved in connection with the device described at the beginning of the description, so that the transfer plate extends to the bottom of the fuel storage and that the transfer of the transfer plate on this bottom has scales projecting upwards along ramps. The transfer plate, which is continuous to the bottom of the fuel storage, i.e. the silo, thus has scales which, in addition to extending from the edge to the edge of the transfer plate 5, protrude upwards along the slopes of the silo. In this case, the pieces of fuel or fuel masses resting on the ramps are released by the scales and the vault is unloaded.

The device according to the invention will now be described in more detail with reference to the accompanying drawing, in which Figure 1 shows the device according to the invention in longitudinal section, and Figure 2 shows a cross-section along the line II-II in Figure 1.

Figure 1 shows a fuel space, i.e. silo 1, a horizontal transfer chute 2 starting from its bottom, a vertical shut-off feed channel 3 at one end of the transfer chute, a boiler or similar fuel space 4 and a combustion space 5. At the bottom of the transfer chute and silo there is a center line 20 and on either side thereof, a fuel transfer plate 21 to which are attached a triangular cross-section of scales 6 and 7, the central portion of which is horizontal and the side portions of which project obliquely upwards along the ramps of the transfer chute and the sieve. The scales 7 on the silo side are longer than the scales of the transfer chute and are less frequent than in the chute, because their transmission power is higher than the transfer power of the chute scales. These long scales 7 effectively prevent the fuel from leaking at the bottom of the silo.

Reference numeral 8 denotes a hydraulic cylinder which moves the scaffold back and forth and transfers fuel from the silo through a feed chute to a shut-off feeder consisting essentially of 35 bearing-mounted hatches 9 and 10 pivoting into the duct 3.