JPS631197Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention provides a lattice floor in which movable lattices and fixed lattices are arranged alternately between both side walls made of refractory material, and the powder and granules on the lattice floor are placed on the lattice floor. This invention relates to a grid-type cooling device that cools powder and granular material by passing cooling gas through it.

The prior art will be explained with reference to FIGS. 1 and 2. In the prior art, as shown in FIG. 1, in the high-temperature section of a grid-type cooling device, both sides of the movable grid 1 in the width direction (left and right direction in FIG. 1) are in sliding contact with both side walls 2 made of refractory material. In order to prevent the side walls 2 from being worn out, blind gratings 3 are provided on both sides of the movable grating 1, and side wall hardware 4 is attached to the side walls 2. In addition, in the low temperature section of the grid cooling system,
As shown in FIG. 2, side wall hardware 5 is attached to the side wall 2.

The side wall metal fittings 4 and 5 in the prior art have a large shape and are susceptible to thermal deformation. Moreover, in the medium to low temperature region, the amount of wear due to sliding contact with the movable grid 6 is large, and the life span is short. Therefore, it is necessary to frequently replace side wall hardware, which hinders long-term continuous operation. Further, due to the wear, cooling air leaks from the gap 7 between the side wall hardware 4 and the blind grid 3 in the high temperature section shown in FIG. 1, and the efficiency of cooling the powder on the grid bed decreases. Furthermore, when replacing the side wall hardware 4, 5 as described above, the side wall hardware 4, 5
Since it is integrated with the side wall 2, it is necessary to remove and restore the side wall 2, which lengthens the replacement period, that is, the period when the grid type cooling device is out of operation.

An object of the present invention is to provide a grid type cooling device that solves the above-mentioned technical problems by preventing the side walls from being worn out without installing side wall hardware.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 is a sectional view of an embodiment of the present invention,
4 is a sectional view taken along the section line - in FIG. 3, and FIG. 5 is a sectional view taken along the section line - in FIG. 3. This lattice type cooling device 10 is, for example, a so-called clinker cooler, and clinker fired in a firing kiln at a high temperature of, for example, about 1350° C. is charged onto the lattice bed 11. This lattice floor 1
The clinker layer deposited on 1 is transported in the direction indicated by arrow 12. An air chamber 13 is located below the lattice floor 11.
is formed, and the cooling air supplied to this air chamber 13 flows upward through the lattice bed 11 and passes through the clinker layer. Therefore, the clinker layer reaches the outlet while being gradually cooled.

The lattice floor 11 is provided between both side walls 14 made of refractory material, and includes a plurality of movable lattices 15 in the axial direction (left and right directions in FIGS. 4 and 5) and a plurality of fixed lattices in the width direction. 16 are arranged alternately. The movable grid 15 is driven by a driving means (not shown).
The clinker layer is reciprocated in the direction shown by the arrow 17, thereby conveying the clinker layer in the direction shown by the arrow 12. These grids 15 and 16 have air chambers 1
A plurality of circulation holes 18 and 19 are respectively formed through which the cooling air in the air conditioner 3 flows upward.

According to the present invention, first blind gratings 20 are provided on both sides of the row of fixed gratings 16 in the width direction, and second blind gratings 21 are provided on both sides of the row of movable gratings 15 in the width direction. These blind grids 2
0 and 21 are provided on the lattice support beam 22 so as to be attachable and detachable using bolts 27 and the like. Furthermore, a protrusion 24 that covers the upper part of the adjacent movable grid 15 is formed in the second blind grid 21 in the longitudinal direction (left-right direction in FIG. 3).

A refractory material layer 25 is formed over the first and second blind grids 20, 21 over the entire length of the grid floor 11. This refractory material layer 25 is formed by composing the side wall 14 with refractory material and then pouring castable or the like into it. Therefore, although the side wall 14 and the refractory material layer 25 appear to be integrated, they can be easily separated during repairs or the like.

Note that the widths of the first and second blind gratings 20 and 21 are selected to be smaller than the widths of the fixed grating 16 and the movable grating 15, for example, about 1/2.

According to this embodiment, the first and second blind gratings 2
0 and 21 are in contact with the high-temperature clinker, thermal deformation of the first and second blind grids 20 and 21 is prevented as much as possible, and burnout is also prevented by the action of the refractory material layer 25. Ru. Furthermore, when a new lattice type cooling device is installed, the width of the lattice floor 11 can be reduced, and the entire cooling device can therefore be made smaller. Furthermore, since the amount of leakage of cooling air at the first and second blind grids 20, 21 is reduced, cooling efficiency is improved. What is particularly important is that when replacing the first and second blind gratings 20, 21 for repair,
Since there is no need to remove the side wall 14, the replacement period is extremely shortened and the period of outage can be reduced.

As another embodiment of the present invention, as shown in FIG. 6, a part of the side wall 14 may be used as the refractory layer to provide the second blind grid 26 and the first blind grid. good.

As described above, according to the present invention, since no side wall hardware is attached, the period during which operations are stopped for repairs is shortened. In addition, cooling efficiency is improved, the lifespan is extended, and long-term continuous operation is possible.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views showing the prior art;
FIG. 3 is a sectional view of an embodiment of the present invention, FIG. 4 is a sectional view taken from the cutting plane line - in FIG. 3, and FIG. 5 is a sectional view taken from the cutting plane line - in FIG. FIG. 6 is a sectional view of another embodiment of the present invention. 11... Grid floor, 14... Side wall, 15... Movable grid, 16... Fixed grid, 20... First blind grid,
21...Second blind grid, 24...Protrusion, 25...Refractory material layer.

Claims (1)

[Scope of claim for utility model registration] A lattice floor consisting of a movable lattice and a fixed lattice arranged alternately is provided between both side walls made of refractory material,
In a grid-type cooling device that cools the powder and granular material by circulating cooling gas flowing through the grid bed through the powder and granular material on the grid bed, first blind grids corresponding to the fixed grid are provided on both sides of the grid bed. and a second blind grid having a protrusion that corresponds to the movable grid and covers a portion of the movable grid near the side wall, is provided in a manner that can be attached and removed freely, and on the upper part of the first and second blind grid, A lattice type cooling device characterized in that a refractory material layer is formed by being separable from a wall.