SU806072A1 - Method and apparatus for dewatering loose materials - Google Patents

Description

This invention relates to a dehydration technique. vanilla bulk materials and can be used in non-metallic, mining and coal industries. In particular, the invention can be used for the dewatering of building sand in concrete facilities and processing and processing plants: Forest ore materials. There is a known method of dewatering bulk materials, which includes loading the dehydrated material into the dewatering chamber, the process of moving it in the chamber with a continuous flow, blowing the material with compressed gas across the flow and unloading the dehydrated material, which is carried out in the device containing the body containing the disinfescent material, it has been exhausted. a device for discharging dehydrated material and a compressed gas device 1. The effectiveness of an existing method of dewatering depends on the pressure of the gas, creating It is in the dewatering chamber. The higher the gas pressure in it, the more intense the dehydration process and the lower the moisture content of the discharged material. However, when the gas pressure in the chamber increases, there is a need to increase the length of the blocking portions of the material flow located in the device case and after the purge zone and prevent gas from escaping into the atmosphere from this area, respectively, in the direction of material loading and unloading, which leads to an increase in device case length and its overall dimensions. In addition, the blocking portion of the material flow, located after the purge zone, does not ensure complete locking of this zone, as the material enters this section that is already partially dehydrated with voids free from liquid, through which part of the gas and moisture entrained from the purge zone penetrates into the zone unloading, as a result, unproductive gas consumption increases and the moisture of the discharged material increases. The purpose of the invention is to intensify the dewatering process and increase the efficiency of using compressed gas.

This goal is achieved by the fact that the dehydrated material is additionally flushed with compressed gas supplied in the direction of material flow to the unloading side, and that in a device for implementing this method, in order to reduce the dimensions of the body, the compressed gas supply unit is installed movable along the axis of the dewatering chamber and provided with a locking mechanism and nozzles of the outlet of compressed gas located at the free end of the pipe from the unloading device dehydrated material at a distance shorter than 1/4 of the length of the body.

In addition, the device for unloading material is made in the form of a lattice, the size of the holes of which is 3-10 sizes of particles of dehydrated material. The drawing shows a device for implementing a method for dewatering bulk materials, a general view.

The device includes a housing 1 comprising a dewatering chamber 2 provided with a filtering wall 3, a device for discharging dehydrated; material, made in the form of a grid 4, the size of the holes in which is 3-10 sizes of the grains of the material and the loading chamber 5.

Inside the housing 1 there is a compressed gas supply device made in the form of a pipe 6 installed with the possibility of moving it along the axis of the chamber 2 in the direction. rings 6. The pipe 6 is provided with a locking device made in the form of locking screws 8, by which the working position of the pipe is fixed, and provided with gas outlet nozzles 9 located at the free end of the pipe 6 and installed less than 1 / from the discharge device 4 device lengths.

The operation of the device to the process of dewatering the material in it is carried out as follows.

First, the grate 4 is closed with a shutter (not shown), and then through pipe 6 into the chamber 2 serves compressed gas, for example air, having made the housing 1 dehydrated with material, such as building sand.

The sand can be supplied in the form of pulp, from under the screening unit and washing of the quarry mass or partially dehydrated, from under the conventional classifier. After filling the hull J. the shutter is opened and you are passed through. loading sand through the grid 4.

With a continuous flow and continuous unloading of sand, the sand moves from top to bottom in the housing 1 in a continuous stream.

In chamber 2 at the site of nozzles 9, it is blown with compressed gas across the flow towards the filter wall 3, and below the nozzles 9, it is additionally blown with compressed gas in the direction of flow towards the discharge side, while the whole sand dewatering process takes place on three successively located sections.

In the sand flow section, located upstream of the nozzles 9 (blocking section), part of the water is displaced from the sand into the loading zone, where it is poured over drain threshold 10 and diverted to discharge.

At the location of the nozzles 9, water is blown out of the sand voids and discharged into the discharge through the filter wall 3. Here, too, the sand grains and film moisture are partially blown off from the surface of the sand grains.

In the area located between the nozzles 9 and the grate 4, the film moisture is removed, which is blown off from the surface of the sand grains by air, sprayed to a mist-like state: and together with the dehydrated sand it goes through the discharge openings of the grate 4 to the atmosphere, where it is dispersed into the surrounding space, at that time, the grate 4, which has discharge openings, the sizes of which are 3-10 sizes of sand grains, excludes sand dumping from the housing 1 under the action of blown air and at the same time provides unloading of its gaps Strongly.

The greatest blow-off effect in spraying film moisture in the last section of the sand flow is achieved by installing the nozzles 9 from the grill 4 at a distance less than 1/4 of the device body length.

In this case, the smaller this distance is, the more intensive the purge and. at the same time more gas consumption. The optimum position of the nozzles 9, which provides the greatest dehydration effect with the lowest air flow, is determined by the test installation of the nozzles 9 at different distances from the grate 4, in set. the limits for which the pipe 6 is moved in the guide rings 7 and fixed with locking screws 8.

Reducing the length of the sand flow between the grate 4 and the nozzles 9 reduces the resistance to air movement in this area and provides, in a manner, the intensification of sand blowing and dewatering and at the same time reduces the body of the device and the overall dimensions of the device. In addition, decontamination of sand in this area eliminates unproductive gas consumption through it, which results in an increase in the efficiency of using compressed gas.

Claims (3)

Claim 1. A method of dehydration of bulk materials, including loading the material into the chamber, blowing it with compressed gas in the dehydration zone 5 across the flow and unloading the material, revealing that, in order to intensify the dehydration process, increase the efficiency of use of compressed gas, the dehydrated material is additionally Yu purge with compressed gas supplied in the direction of movement of a note of dehydrated material in the direction of discharge. 2 ·. A device for implementing the method according to π. 1, comprising a housing, a loading chamber "5 and a dehydration chamber equipped with a filter wall, a device for unloading dehydrated material and a compressed gas supply device, characterized in that, in order to reduce the dimensions, the compressed gas supply device is made in the form of a pipe installed with the possibility of movement along the axis of the dehydration chamber and equipped with a fixing mechanism and compressed gas outlet nozzles located at the free end of the pipe from the device for unloading the material at a distance less than 1/4 of the length a. 3. The device according to p. 2, about t and h and ya shch with it so that. the device for unloading the dehydrated material is made in the form of a lattice, the size of the holes of which is 3-10 grain sizes of the grains of the dehydrated material.