SU1572999A1 - Arrangement for collecting flotation sludge - Google Patents

Abstract

The invention relates to the treatment of natural and waste waters and can be used to collect flotation sludge. The purpose of the invention is to increase the efficiency of operation by compacting sludge. In the device, which includes a flotation cell, a scraper conveyor with solid blades (L) equipped with concave guide plates (LW) fixed in their lower part with a gap, a tray for collecting sludge, feed and discharge pipelines for purified water, L are equipped with fixed the lower part is additional concave NP, while the NP is installed with the possibility of vertical movement by fastening consisting of rods with grooves and bolts installed in the grooves. 1 ill.

Description

The invention relates to the purification of natural and waste waters, namely, devices for collecting flotation sludge from the surface of installations in which water is treated or sludge is compacted by the method of flotation.

The purpose of the invention is to increase the efficiency of the operation by compacting the sludge.

FIG. 1 shows a device, a general view; in fig. 2 - paddle, isometric projection.

The device includes a rectangular housing 1, which is equipped with a pipeline 2 for supplying treated water and a pipeline 3 for draining purified water, a tray 4 for collecting flotation sludge. In the upper part of the housing 1 there is a scraper device, for example, a scraper conveyor 5 having blades 6 immersed in the upper layer of the sludge slit. The blades in the lower part are provided with guide plates 7, which are mounted with a gap to the blades and are made concave. The plates 7 and the blades 6 are fastened to each other by means of a fastener consisting of rods 8 with grooves 9. The lower end of the rods is fixed rigidly to the plates 7, and bolted joints 10 are fixed in the grooves, which are fixed with rods with vanes 6. Blades 6 in the course of their movement in the sludge are provided with additional guide plates 11 fixed in their lower part, forming a gap with the guide plates 7, which decreases along the way

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slurry movement. The plates J1 are made concave (for example, the surface of the Segment or the shape of the Archimedes spiral segment, in cross section of the plate 11, etc.), which facilitates the organization of the movement of the collected and densified sludge in the gap.

The device works as follows.

A cleaned liquid saturated with gas is supplied to the housing 1 through the pipeline 2. When the liquid moves to the pipeline 3 for discharging the purified water in the Case 1, gas bubbles are released from the liquid, floating the suspended particles, and a layer of flotation sludge is formed on the surface of the liquid. The blades fixed on the continuously moving conveyor 5 with the guide plates 7 and the additional guide plates 11 are immersed in the upper least damp layer of sludge. At the same time, they collect this layer without any mixing, pass extra sludge through the gap between the guiding plates TJ-ins 7 and 11. When the sludge moves in the gap, it is compacted, this can not only be excessively collected slime layer, but also the underlying slime layer, the height of which can be set. Increase the gap between the upper edges of the plates 7 and the lower ends of the blades 6. The gap is adjusted by moving the plates 7 with the rod 8 relative to the blades 6 and fixing them together by bolting 10. Compaction of the sludge in the gap between the plates 7 and 11 helps to reduce its humidity, except that

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Go, this allows organized flow of the collected sludge through the gap and put it behind the blades 6 as they move onto the surface of the underlying layer without mixing with this layer. The laid layer has a low humidity, which contributes to the removal of the slime of the lowest moisture content by subsequent blades 6.

The collected sludge enters tray 4 and is discharged further as intended. The purified liquid is discharged through line 3.

The use of the proposed device makes it possible to more efficiently collect a layer of sludge with the lowest humidity due to compaction and the organization of sludge movement in the gap. This helps reduce the cost of further processing and disposal of sludge.

Claims (1)

Shadow Formula A device for collecting flotation pshama, including a flotation chamber, a scraper conveyor with solid blades, equipped with concave guide plates fixed in their lower part with a gap, a tray for collecting sludge, supply lines for supplying and discharging purified water, characterized in that working efficiency due to compaction of the sludge, the blades are provided with additional guide concave plates fixed in their lower part, while the guide plates are installed with Vertical, movement. / 7 P 6 f five Ow 1 FIG. 2