SU1138628A1 - Drier for loose materials - Google Patents

Abstract

DRYER FOR BULK MATERIALS, containing a drying chamber with a conveyor inside and a loading device consisting of a feeder and a distributor installed across the conveyor, characterized in that, in order to improve the quality of drying by preventing the granules from deforming, the distributor is inclined to the conveyor plane inclined a rotating drum with an A1ntovaya slot and a trapezoidal guide element installed under it with a width not less than the distance between the first projections of the extreme t check screw reel slots. ABOUT)

Description

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tplft.f. 1 The invention relates to a drying technique and can be used in the metallurgical, chemical and other industrial sectors for drying bulk materials, including soft plastic granules. One of the main conditions for the qualitative drying of the bulk material with the lowest consumption of heat-transfer agent is the uniform distribution of the material being dried on the conveyor belt. When drying soft plastic granules, it is equally important to ensure uniform packing of the material without destroying the granules when leveling them on the conveyor belt, since violation of their integrity significantly fits the quality of the final product, necessitates an additional operation of rejecting substandard material and, accordingly, reducing the yield of the final product required granulometric composition, Known dryer for low-flow agricultural agricultural materials, mainly LBNYANogo heap, with; a rectangular camera with a chain-planed conveyor installed on its bottom and a conveyor belt with a moving belt mounted above the camera with the possibility of 1 horizontal movement, and an additional feed conveyor placed above the stacker conveyor, the output end of which is conveyor-stacker longer than the length of the feeding conveyor 1J, Also known dryer for poorly flowing fibrous materials, such as linework, containing an existing chamber with an infinite plate conveyor in the lower part and the gas distribution grid 2 located under its upper working branch. The disadvantage of these suction blocks is the uneven loading of the sushilny transporter. If at the beginning of loading, for the first code of the conveyor-stacker, for example, to the left there is a single layer of material that is laid on the left half of the drying conveyor, when reversing the conveyor-stacker, its belt, which already has one layer of material, is pulled out of the conveyor belt. stacker with a second layer of material. Thus, a double layer of material is already laid on the right half of the drying conveyor, i.e., the drying conveyor is unevenly loaded in length, which creates different conditions for drying a batch of material and reduces its quality. In addition, the material is laid in these dryers not by the width, but by the length of the drying conveyor, which requires the latter to be stopped to ensure loading. The continuity of the process is disrupted, which reduces the productivity of the dryer and the efficiency of use of the coolant, thereby unnecessarily increasing the specific energy consumption for drying the material. This disadvantage also makes it difficult to use these dryers as part of production lines. When soft plastic granules are dropped from a transporting stacker onto a drying conveyor, the granules can be destroyed or stuck together in briquettes, which significantly impairs the qualitative granulometric composition of the final product and requires an additional non-refining operation. a dietary product. At the same time, the yield of conditioned pellets decreases and, accordingly, the efficiency of use from the sawing blade; The drawback of dryers is also the cumbersome design of the loading devices, which makes them difficult to place inside the closed drying chamber. The open design of the drying chamber leads to an additional decrease in the efficiency of using the heat-transfer agent, an increase in the specific energy consumption. A known dryer for solids containing a drying chamber with a conveyor inside and a loading device consisting of a feeder and a ZP i distributor installed across the conveyor. However, in a known dryer, when drying soft plastic granules, the latter are removed and destroyed by the leveler. Thus, the particle size distribution of the material is disturbed, the need for an additional sorting operation arises, and the yield of the conditioned product is reduced. In addition, ensuring the distribution of the material across the entire width of the belt is difficult, since at the slightest asymmetrical loading, the material is either not enough to reach the edge of the belt, or it is discharged from it with a leveler. The purpose of the invention is to improve the quality of drying by preventing deformation of the granules. This goal is achieved by the fact that in a dryer for moving materials, containing a drying chamber with a conveyor inside and a boot, a device consisting of a feeder and a distributor installed across the transport of the distributor, the latter is made in the form of an inclined plane of a rotating conveyor with a screw slot and a trapezoidal guide element underneath, with a width not less than the distance between the projections of the extreme points of the helical slot of the drum. FIG. the dryer is depicted, obeshivat view, figure 2 - view A in FIG. 1 on Aig.Z - section. BB in Fig.2 {fig, 4 - section bb in Fig.Z. Dryer for bulk materials consists of a drying chamber 1 with a drying conveyor 2 placed in it, above which a distributor 3 is installed across it in the form of a rotating drum, installed obliquely and connected with a drive. home 4 turns. The inner cavity of the drum 3 may be in the form of a cone or cylinder, while at that its axis may be located horizontally or inclined to the horizontal. However, in any case, the lower inner surface of the drum 3 — the vanishing surface of the bulk material 5 must be inclined to the horizontal in the direction opposite to the load, in order to allow the material 5 to be transported along the drum 3. The optimum slope of the surface of the material 5 is at an angle no less than the angle of repose of the material. Under the drum 3, a directing element 6 is installed, the surface of which is parallel to the generatrix of the lower inner surface of the drum 3, which is provided with a screw slot 7. The length of the latter is taken such that the distance between the projections of its edge on the conveyor belt 2 does not exceed the width of the guide element 6. The direction of the screw slot 7 mb. It may coincide with the direction of rotation of the drum 3 or be opposite to it. Since the trajectory of the longitudinal movement of the material 5 relative to the surface of the drum 3 due to the rotation of the latter deviates from its forming, the length of the screw slot 7 made in the direction of rotation of the drum 3 is less than one turn by 4L and the length of the screw slot 7 executed in the opposite direction the rotation of the drum 3 dryer. one turn for the value of,, The value of bL is determined by the formula ul L- -5 Qlt gpe L - the length of one turn of the screw slot 7, "t, - rotation of the drum 3 during the longitudinal movement of the material 5 along it from the beginning to the end of the slot 6 Inside the drum 3 along the opposite end of the loading end of the edge of the slot 7, there is a fender shoulder 8. In plan, the axis of the drum 3 can be either perpendicular to the axis: Conveyor 2, or tilted to it (Fig. 1 and 1. The last installation option provides for laying a row for drying bulk material 5 perpendic at the beginning and at the end of loading a batch of material. C6 of the boot end of the drum 3 has a feeder 9 (for example, a tape conveyor and a feed funnel 10. The device works about + once. Turn on the conveyor belt 2 and the drive 4 of rotation of the drum 3. Under the drying bulk material 5, the feeder 9 is evenly fed into the feed hopper 10, and from there into the cavity of the drum 3. In the case of screw screw 7, in the direction of rotation of the drum 3, material 5 placed under the action of gravity to the lower end of the slot 7, wakes up through it and is guided on the conveyor 6 on a conveyor 2. When the drum 3 rotates further, the point of intersection of the material flow along the material flow 5 and the screw slot 7 moves to the loading end of the drum 3, The outflow point of the material 5 from: the drum 3 moves in a practical way. A row of material 5 is laid on the carrier 2, After the slot 7 leaves the intersection with the material flow 5, the latter moves again Along the drum 3 to the lower end of the slit 7. During the lining of one row of material 5, the traysporter 2 displaces it relative to the drum 3. Thus, the subsequent row is located parallel to the previous one. The distance between the rows (stacking density and material) can be varied by varying the speed of the conveyor 2 and / or the frequency of rotation of the drum 3,

In the case of making the screw slot 7 in the direction opposite to the rotation of the drum 3, the movement of the point of intersection of the flow of the material 5 moving along the rotating drum 3 with the screw slot 7 occurs in the direction from the loading edge of the barban 3.

In the rest of the process of laying material 5 on the conveyor 2 is the same as described.

The use of the proposed substance allows a continuous substance to be arranged in a uniform layer of soft and plastic granules, and avoiding their destruction and deformation during leveling on the belt of the drying conveyor. In addition, the quality of the final product increases, the yield of conditioned oat will melt after drying, there is no need; in additional operations on sorting of the dried up oaks.

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Claims (1)

A DRYER FOR BULK MATERIALS, comprising a drying chamber with a conveyor inside and a loading device consisting of a feeder and a distributor installed across the conveyor, characterized in that, in order to improve the quality of drying by preventing deformation of the granules, the distributor is made in the form of a rotary oblique to the plane of the conveyor drum with Agnta slot and a trapezoidal guide element installed under it with a width not less than the distance between the projections of the extreme points of the tovoy § reel slots. SU. ,, 1138628 1 1138628 2