FI106246B - A device for moving bulk material - Google Patents

Description

1 106246

A device for moving bulk material

Background of the Invention

The invention relates to an apparatus for moving bulk material, the apparatus having an endless conveying means, which by means of pivoting means is defined by a lower 5 runway for moving the bulk material forward and a return track passing above the lower track; a material transfer area at the first end of the device having an initial end of the material transfer web; a material removal area at one end of the device where the transfer means is guided from the lower web to the return web; and means for leveling the material conveyed by the lower conveyor portion 10 of the conveyor means, the means for leveling material conveyed by the lower conveyor portion comprising the return track portion.

These types of conveyors are used in particular to supply solid 15 fuel to the combustion chamber of power plant boilers. As a rule, the fuel handling is carried out in such a way that there is a large fuel storage area in the yard of the power plant, during which the material is crushed and screened. From the fuel storage, the fuel is transported by a conveyor to a smaller silo inside the power plant. a day silo with enough volume for about 1 to 4 hours, even in the event of a break in the flow of material from the fuel depot.

The day silo is typically deflated using either a moving screw Y; ' v. 'a conveyor for transporting fuel per boiler, which is generally · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 25 - Tin.

The problem with this arrangement is that solid fuel, which: Ts is generally fibrous or otherwise miscible in size ranging from about 1 mm up to 200 mn, does not discharge uniformly due to the day silo on the other hand. some repetitive vaulting phenomenon in the silo, and on the other hand, the material sticking to the edges of the hole. The Kita aperture here refers to the aperture through which the unloader pulls the material in the silo, whereby the function of the aperture is to limit the uncontrolled discharge of 7 material onto the collision conveyor. As the shear surface of the fibrous material is extremely vague, the result is variable:. material flow to the conveyor leading to the boiler and further to the boiler where «· · 35 uneven feed current causes pressure fluctuation and uneven combustion. Although the most common day silo unloader is a screw unloader, which rotates about 2 106246 flax about once every 10 minutes, the problem is the same when using any of the above silo unloaders.

To reduce the above-described drawback, the present solutions have used a smaller buffer storage 5 between the day silo and the bump conveyor, from which the bump conveyor in turn pulls the material through its gap opening, whereby the problems are the same but smaller than above.

Another solution in use is one with a leveling pocket at the boiler side end of the bump conveyor and a screw conveyor at the bottom which further discharges the material through the tray feeders into the boiler. In this case, as in the previous solution, the basic problem remains.

In addition, means have been used to smoothen the material conveyed by the part of the crash conveyor moving on the lower web of the crash conveyor. The instrument used has been a fixed blade or a rotating roll fitted between the upper and lower webs, but must be so high that they will not be exposed to congestion and, on the other hand, will not properly compensate for the deficient material flow. The heaps moving in front of the cave become flat-roofed, but the effect of leveling the material flow is small.

Brief Description of the Invention

It is therefore an object of the present invention to develop the apparatus mentioned above so as to eliminate the above-mentioned problems with the aim of achieving as uniform a flow of material as possible. This goal is achieved by k <- '; ; ' a device according to the invention, characterized in that, by means of the transfer means and its deflection means, a leveling space is formed on the return path above the plane or levels thereof which the portion of the transfer means on the return path conveys the additional material accumulated in the smoothing; at the same time forms a replenishment store for the part of the conveyor moving material on the lower track, the deflection means t comprising at least three deflection rolls, and that in the direction of the return track. in fact, at least the first deflection roller is height adjustable for adjusting • 30.

The invention is simply based on the idea that a portion of the conveyor means on the return track and its movement beneath it is utilized to smoothen the material moving in a counter-current direction instead of: previously allowed to travel freely.

The device according to the invention enables a low device placement, as prior art high-volume straightening pockets 3 106246 are not required. It is also easy to implement for legacy cola-type solutions, as the device placement remains the same. When using a bump conveyor, the material mattress is flush with several bumps to ensure that the mattress becomes even.

5 When using the equalization mode, the material contained therein is in a continuous rotary motion, which further mixes the individual fuel fractions, which in turn has a calorific effect on the fuel when fractions of a different calorific value are mixed together. Equilibrium mode also provides a mattress with a flat weight, as there is no fixed 10 hole opening against which the material is normally pressed or sealed before it is cut and exhaled, since in this equilibrium the return part is formed by a conveyor portion which is movable limiting, while removing excess material to be returned from the conveyor outlet to the equalization position.

15 Brief Description of the Drawings

The invention will now be described in more detail by means of one preferred exemplary embodiment with reference to the accompanying drawing, which shows a device according to the invention in a side cross-section.

DETAILED DESCRIPTION OF THE INVENTION The apparatus for transporting bulk material shown in the drawing comprises

t I

an endless conveying means, in this example, a collet conveyor 1 having a diverting pulley, located at opposite ends of the device, acting as a rotating member. . a lower runway L designated by means of 2 and 3 for moving bulk material M forward, and a return track U passing above the lower track.

: A: 25 The conveyor 1 is disposed in an elongated conveyor body 4 having a bottom 5, side walls 6 and a ceiling 7 connected to the side walls and closing the device 7. The lower surface of the conveyor 1 is substantially aligned with the lower path. with the side walls 6 being substantially sealed against the conveyor 1 inside * * - - *. #. The feed point 8 of the transportable material M, i.e. in this case the feed opening 8 provided in the roof T 30, is located at the first end of the device where f 11 * is the beginning of the material transfer web L and the outlet 9 of the transport material wherein conveyor 1 is guided from lower track L to return path U

'. The device operates by feeding material to be conveyed from the inlet 8 through a portion of the conveyor 1 on the return path U to a portion of the conveyor 4 106246 on the lower track L, whereby the collar members 10 are spaced apart .

In order to obtain the previously described steady flow of material, means 5 are provided on the device 5 for smoothing the material M conveyed by a portion of the conveyor 1 moving on the lower track L. These means simply consist of a portion of the conveyor 1 moving on the return track U, which threads the material stream moving on the lower track L, i.e. the alignment is accomplished by a sufficiently small clearance 10 between the lower track and the upper track. In this exemplary case, the collar members 10 of the conveyor 1 make lapping effective.

In addition, a leveling space 14 is formed by the conveyor 1 and deflection means 11-13 on the return path U above its level, whereby the portion of the conveyor 1 on the return path U transports the excess material M accumulated in the leveling .

In this example, the deflection members comprise three deflection blades 11-13 attached to the side walls 6 of the conveyor body 4, the middle roll 12 of which is at a selected height above the plane formed by the return track U at the front and rear pockets 11 and 13.

Preferably, the device is provided with means for adjusting the amount of material 25 entering the equalization space 14. These means may be provided, for example, such that IM 1 • · '·· * as viewed in the direction of the return path U, the first deflection roll, or roll: .v11, is height adjustable. For this adjustment, the equalizer 14 has a sensor (not shown in the drawing) for measuring the amount of material therein and for controlling means 30 for adjusting the amount of material entering the equalizer 14, i.e. adjusting the elevation of the roll 11.

• · ·

The foregoing description of the invention is merely intended to illustrate the invention. However, one of ordinary skill in the art can implement its details in various ways within the scope of the appended claims. Thus, for example, the solution according to the invention can also be implemented in existing co-operatives. 35 flatbed conveyors. In this case, only the addition of deflection elements * ·, 106246 o and the raising of the side walls and ceiling at this point are required for the leveling space. The space for deflection means may also be added as a separate unit.

K t «« 1 • • • • • 1 • • • • • • f1 »• • • • • • • • • • • • • • • • • • • • • • • • • · · · · · ·:

Claims (5)

Device for transporting bulk goods, which device comprises a sleeveless conveyor (1), for which a lower thread path (L) for transporting the bulk goods (M) forward and a return path is determined by means of pivot means (2, 3). (U) running above the lower path; a feeding area for the material to be transported at one end of the device, where the web (L) carrying the material begins; a discharge area for the material to be transported at the other end of the device, where the conveyor (1) is guided from the lower web to the return web (U); and means for smoothing the material (M) conveyed forward by the part of the conveyor (1) moving on the lower web (L), the means for equalizing the material (M) being conveyed forward by the part of the conveyor (1). the conveyor (1) moving on the lower web (L) consists of the movable part of the conveyor (1) on the return web (1), characterized in that on the return web (U) it has above the plane (s) formed the plane 15 is formed a conveyor (1) and by means of its deflector (11 - 13) an equalization space (14), to which the conveyor on the return path (U) transports excess material (M) accumulated at the leveling and at the same time constitutes a complementary stock for the lower web (L) moving part of the conveyor transporting the material forward, and the deflection means 20 comprise at least three deflection rollers (11-13), and in the direction of the return web (U), at least the first deflection roll ( 11) is regulated in the height direction for controlling the amount of material (M) entering the leveling; (14). 2. Device according to claim 1, characterized in that the conveyor is a scrap conveyor (1), which is placed in an elongated conveyor: porter body (4) having at least the bottom (5). ) and sidewalls (6), wherein trans; the lower surface of the porter (1), when on the lower thread path (L), is arranged to run substantially in level with the bottom, the side walls (6) being located substantially close to the sides of the conveyor. · "·. 30 3. Device according to claim 2, characterized in that the deflection rollers (11 - 13) are fixed to the side walls of the conveyor body (4). • At least one roll (12) is located on the the selected height above the plane (s) formed by the return path (s), and at each individual occasion at least one roller (11, 13) is at a definite distance in the longitudinal direction of the conveyor (1) on both sides of said higher located roller ( 12) 9 106246 Device according to any of claims 1 to 3, characterized in that in the equalizing space (14) an identifier is arranged to measure the amount of material (M) therein and to regulate at least the first deflection roller (11). Device according to any one of claims 2 to 4, characterized in that it also has an upper surface (7), which is connected to the side walls (6) and which closes the device, on which surface there is provided an inlet opening ( 8) for materials to be transported. <· · I I | «1 · I · • · · · · · 1 1« «111 • · • 1 · • Il« »· • · · • · *» II1 * · · · • · »• · · Ml« · «· · II «M ·