RU2014289C1 - Slag dehydration device - Google Patents

Abstract

FIELD: chemical equipment; solid particles separation. SUBSTANCE: device has storage bins 1, chamber 2 for purified water, slug pulp feeding piping 3, dehydrated slag outlet gate device 4, disk filters 5, compressed air supply piping 6, filter device gate 7 for water drainage. The quality and speed of the dehydration process is increased owing to additional water drainage from the bin by the means of disk filters. EFFECT: increased efficiency of the process; increased quality of dehydration. 2 cl, 3 dwg

Description

 The invention relates to the separation of suspended solids from liquids, in particular to storage bins, and can be used for dewatering slag pulp.

 A device for dehydration is known - a thickener containing a storage hopper, a clarified water chamber, a locking device for discharging condensed slag, and slag pulp supply pipelines.

 The disadvantage of this device is the high humidity of the slag pulp after dehydration, since the thickener does not have the removal of residual liquid from the hopper after sediment accumulation. This worsens the quality of dehydration and increases the economic and energy costs of pulp dehydration, as this necessitates additional dehydration in other devices, which reduces the efficiency of using storage bins and reduces the rate of dehydration.

 The purpose of the invention is improving the quality of dehydration and increasing the speed of the dehydration process.

 The essence of the invention lies in the fact that in a device for dewatering slag containing storage hoppers, a clarified water chamber, a shut-off device for discharging condensed slag and slag pulp supply pipelines, according to the invention, each storage hopper is equipped with a drain filter installed perpendicularly to the bottom of the hopper inclined surface, which reduces the pressure of the slag in the hopper on the disk filter, and a locking device. The device is also equipped with a purge unit.

 Due to the additional drainage of water from the hopper by means of a disk filter, the quality of dehydration is improved, and as a result, the dehydration rate is increased.

 In Fig.1 shows a device for dehydration of slag in isometry; in FIG. 2 shows a disk filter, section AA in FIG. 1; figure 3 is a section bB in figure 2.

 A device for dewatering slag consists of storage bins 1, a clarified water chamber 2, slag pulp supply pipes 3, a slide shut-off device 4 for discharging dehydrated slag, disk filters 5, compressed air supply pipes 6, a valve 7 of a filter device for draining water. Each storage hopper 1 and the clarified water chamber 2 are separated by an overflow rib 8, and there is a water discharge pipe 9. The device is equipped with a purge unit 10 for cleaning the disk filter from slag particles, the pressure of the treatment air to which is supplied from the compressor station.

 The device operates as follows.

 In sludge tanks (storage bins), sediment of slag pulp is accumulated. Slag, having a high density, settles on the pyramid-shaped bottom of the hopper. Water is drained through the top of the hopper, and slag sediment fills the hopper. When the hopper is full of sludge, the pulp is stopped. Slag, having a glassy structure, easily gives off moisture, so it’s enough to open the hole in the lower part of the hopper, which lets only water through, as it exits from the hopper by gravity. Only then is slag produced. The filter during operation of the device may become clogged with slag particles, it is cleaned by blowing after each cycle.

 The pulp through pipelines 3 alternately fills the storage hopper 1, the residual water from the storage hopper through the overflow rib 8 enters the clarified water chamber 2. After the accumulation of sediment in the storage hopper 1 remains slag, which according to the technological regulations may contain up to 20% moisture. This slag is removed through a filter 5 through a pipe 9 with a previously open gate valve 7. After removing the water, the slide gate device 4 opens and the dehydrated slag is discharged. Then the valve 7 is closed and compressed air is supplied to the pipe 9 from the purge unit 10 through the pipe 6 to clean the filter 5 from slag particles.

 When using the invention, the efficiency of the use of storage bunkers for dewatering slag pulp sharply increases, and the quality of the slag improves and the process speed increases. This leads to a significant economy of energy and labor resources due to the replacement of controlled mechanized operations by spontaneous, not requiring energy costs and needing only control.

Claims (2)

 1. A device for dewatering slag, containing storage hoppers, clarified water chambers, a shut-off device for condensed slag discharge and slag pulp supply pipelines, characterized in that each storage hopper is equipped with a drainage disc filter installed in the lower part of the hopper perpendicular to the inclined surface, and locking device.  2. The device according to claim 1, characterized in that it is equipped with a purge unit.

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