RU1779403C - Installation for processing friable materials - Google Patents

Abstract

Usage: processing plants producing technological raw materials. SUMMARY OF THE INVENTION: the device comprises a hammer mill with a crushing chamber. The crushing chamber has an inlet and an outlet. The installation includes a system for loading and unloading material. The blower housing is placed in a bath with a cooling agent and is equipped with a collector in the form of a pocket protruding outward. The manifold of the pipeline is connected to the condensate tank and is oriented perpendicular to the direction of air flow in the blower body. 1 ill.

Description

FIELD OF THE INVENTION The invention relates to bulk sample preparation devices and can be used in processing plants producing technological raw materials, for example, for alumina production.

The purpose of the invention is to increase operating efficiency by constantly removing evaporated moisture.

The drawing shows the proposed installation.

The plant for processing bulk materials contains a hammer mill 1 with a crushing chamber 2, blocked from below by a plate 4. Turning plate 4 is kinematically connected to the drive by a pusher 5. pivotally mounted on the foundation 6 of the crusher 1. A container is suspended from the free end of the turning plate 4 7 with a dynamometer (or other measuring device or sensor) 8.

In the upper part, the crushing chamber has two holes: inlet 9 and outlet 10.

Above the inlet 9 is a loading shaft 11 with a gravity (gravity) helical descent 12. In the upper part, the shaft 11 is equipped with a receiving funnel 13 for a sample of bulk cargo taken from the process. Under the funnel 13 there are two sequentially placed flasher flashers 14 and 15.

A descriptive pipe 16 is placed inside the shaft 11 in the center of the helical descent 12, the lower part of which is brought out of the shaft 11 to the side and connected through the umbrella 17 to the outlet 10 of the crusher 1. The upper part of the description pipe 16 is also taken out of the shaft 11 and connected to the pipe 18 cyclone 19.

The cyclone 19 through the filter 20 is connected to the blower 21, the discharge pipe 22 of which through the air heater 23 and the pipe 24 is connected to the cavity of the shaft 11c with a supply to it from above. Under the cyclone 19 (under its outlet for the solid product) is placed a mixing funnel 25, and under it a dish-shaped

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contractor 26. The latter is equipped with estrus 27 of reduced sample and estrus 28 of excess product.

Under estrus 27 of the reduced sample, a second disk contractor 29 is installed, equipped with estrus 30 of the prepared sample and estrus 31 of the excess product.

The groove 30 is placed with the possibility of supplying a sample to the container 32, and both estrus 28 and 31 of the excess products are connected to a collection chute 33, which is installed with the possibility of feeding the excess product to the discharge conveyor 34.

The housing 35 of the blower 21 in its lower part is equipped with a manifold 36 arranged parallel to the axis 37 of the blower shaft and immersed in a bath 28 with a cooling agent 39. The bath 38 is equipped with a pipe 40 for supplying a cooling agent 39, the pipe 40 is equipped with a valve 41. The collector 36 of the blower 21 with a pipe 42 is connected to a condensate tank 43. The tank 43 is equipped with a drain pipe 44 with a valve 45 and an emergency condensate discharge pipe 46.

The device operates as follows.

A representative sample of bulk cargo taken from the technological process is fed and during the entire time of sampling to the receiving funnel 13. Successively passing through the flashers 14 and 15, the bulk cargo falls into the loading shaft 11 onto a gravity-driven screw descent 12. On the spiral descent 12, moving under by the action of gravity, the load reaches the inlet (loading) hole 9 of the hammer mill 1. Passage inside the shaft 11 along the helical descent 12, the bulk cargo is dried with hot air supplied by the blower 21 through the air heater 23, in which previously heated air is additionally continuously heated.

The hot air supplied through the nozzle 24 to the charge 11 not only dries the bulk cargo transported via the helical descent 12, but also contributes to the gravity flow of the cargo due to the associated air flow.

When the rotor of the hammer crusher 1 is rotated, the cargo entering the crushing chamber 2 is crushed and crushed several times, circulated inside the crushing chamber 2 of the hammer crusher 1, and is also additionally dried with hot air constantly passing through the opening 9 into the crushing chamber 2.

It is crushed to the set size set by the speed of air-dust

flow, part of the bulk cargo is continuously sucked from the crushing chamber 2 through the outlet 10, the umbrella 17, the suction pipe 16, the pipe 18 into the cyclone 19. In

solid cyclone 19, the constituent air-dust stream is deposited and enters the mixing funnel 25 through the outlet of the cyclone 19.

Air flow passage through

the filter 20 is freed from the residual dust fraction and the blower 21 is again directed through the air heater 23 to the pipe 24 and then to the shaft 11.

The passage through the blower 21, humidified by drying the bulk cargo, coming into contact with the cooled case 35 of the blower 21, lowers its temperature. Due to this, the vapor contained in the air condenses on the inner surface of the housing 35. Moisture that has formed drains into the collector 36, and from it flows by gravity through the pipe 42 into the tank 43, from which it is continuously or periodically removed through the drain pipe 44.

Permanent cooling of the housing 35 of the blower 21 below the dew temperature is provided by the cooling agent 39 located in the bath 38 and replenished

through conduit 40 as needed.

Thus, moisture removed from the bulk cargo during processing in the device is constantly removed from the closed path of the sample preparation system.

The presence of the collector 36 eliminates the secondary capture and entrainment of air droplets of moisture, because it is fixed in a narrow space, oriented perpendicular to the air flow and extended outside it.

When the heated air-dust flow passes through the suction pipe 16, the screw surface 12 is additionally heated from the pipe 16, which contributes to the additional drying of the cargo transported along the spiral descent 12. At the same time, the probability of lubrication of the internal cavity is reduced.

mine 11 moistened with cargo.

The conditioned sample coming from the cyclone 19 to the mixing funnel 25 is first reduced by the first tray reducer 26 and then by the second 29. The separated portion of the sample is discharged into the container 32 for further analysis. Excess sample portions along estrus 28 and 31 are routed to collection estrus 33 and then to a discharge conveyor 34.

After grinding all or a significant part of the bulk sample taken from the technological process, the equipment of the device is turned off.

After stopping the rotor of the crusher 1, the pusher drive 5 is turned on, which leads down the plate 4, turning it around the hinge 3. In this case, the excess grains remaining in the crushing chamber 2 are dumped into the container 7. The weight of the excess grains in the sample taken is determined by the recording device 8 , and according to the percentage of the mass of excess grains in the total mass of the sample, the indicators obtained by analyzing this sample are adjusted using average statistics.

After reading the recording device 8, the container 7 is unloaded on

the discharge conveyor 34 and further to the raw material storage together with the excess product previously discharged onto the same conveyor 34.

The device is ready to receive and process a new sample of bulk cargo.

Claims (1)

SUMMARY OF THE INVENTION A plant for processing bulk solids Mg 1727888, characterized in that, in order to increase 0 work efficiency due to the constant removal of evaporated moisture, it is equipped with a bath with a cooling agent and a condensate tank, and the blower body is equipped with a collector in the form of a protruding outward 5 of the pocket and is connected via a pipe to the condensate tank, the collector being oriented perpendicular to the direction of air flow in the blower body. 22 21 35 .... // / VW