HU206460B - Apparatus for settling sludge or/and water containing scale originating from metallurgy of ferrous metals - Google Patents

Abstract

The equipment comprises a settling space, liq. feed and clarified water and sludge discharge, to deal with slurry and/or water effluent of iron smelting activities. The settling space is a basin with pref. circular cross section which decreases in the downward direction. It has an outer wall (2b), bottom (2a) and a central downcomer (31). The bottom of the downcomer is set at a distance above the bottom plate (2a). Its top end is extended above the liq. level (V2) of the basin (2). The cross section of the basin decreases more rapidly below the bottom of the downcomer (31). The inlet channel (1) is joined to the downcomer (31), pref. above the liq. level (V2). The outside of the downcomer (31) is joined to a conical inner wall (4) which forms the boundary of the clarified water space (37). The top of this inner wall carries a collector trough (36) with a stilling/level control weir. A divider wall (41) is also located between the downcomer (31) and the inner wall (4). This carries a feed trough (5), also equipped with a level control weir, which is fed from the collector trough (36). Clarified water is removed by a submersible pump (52) located on the side of the divider wall (41) which is opposite the feed trough (5).(Dwg.1/19)

Description

Scope of the description: 10 pages (including 5 sheets)

HU 206 460 Β is provided with a stretching dividing wall (41) along which a feed trough (5), preferably provided with a leveling drop, extends from the collecting channel (36). To remove the purified water, this divider closure wall (41) has a pump (52) submerged in the purified water space (37) on the opposite side of the feed trough (5).

The present invention relates to a device for sedimentation of slurry or water containing iron from iron metallurgy.

Iron sludges or waste waters contain metallurgical (rolling!) Rot, which is a sharp-edged, tear-resistant, solid, solid material with oily surface and stops under a steep slope under water. At present, torrential wastewater and slurries are sedimented in a long-flow pool or in a simple deep pit. In these structures, the fluid to be settled 15 is introduced on one side and the water released from the high-density impurities flows out on the other side. The settling is controlled by the residence time and the horizontal flow rate. When the basin or shaft is filled with a solid phase containing the reed, it is lifted by a gripper. However, this method is cumbersome, cumbersome, labor intensive and costly because the sediment sediment is a very difficult to handle material. A further disadvantage is the plant's periodicity, since during the period of extraction of the sediment, the equipment cannot be used for sedimentation.

[0003] The apparatus of U.S. Patent No. 180,793 discloses an apparatus for recovering solid particles in a fluid flowing in a pipeline. To perform this operation, the centrifugal force separating effect of the centrifugal movement is used, the closed tank settling is used, and the sedimented solid is discharged through the pipeline by a water stream. Since the sedimented solids can only be moved with large amounts of water and the shrinkage waters generated in the iron casing typically flow gravitationally, this solution is not economically applicable to sedimentation of slags and waters containing the reed.

According to the German description of 3305 344, the sedimentation of solid particles is carried out in a longitudinal flow basin. Various baffles are inserted at the inlet to activate the pool surface. This facility is also unsuitable for sedimentation of tailing waters, as its iron shafts will settle between the baffles, preventing the pool from functioning properly. Removing the reve would only be possible by emptying the pool.

According to British Patent Specification 2148744, the solid phase water is rotated by mechanical force, and it is suggested to use the resulting grease to guide the solid particles 50 into a sump in the center of the circular pool, from which they are removed by pumping.

The disadvantage of the apparatus is that it requires a continuous energy demand, a rough, heavy massive rupture is difficult to pump, using only a large amount of water 55, which in turn assumes further dewatering of the solid. The recoverability of fine grains is doubtful in the form of crayons; the device can only be considered as a thickener in practice.

According to the Soviet invention No. 1426617, the solid phase is deposited into the ditch with a longitudinal flow of 60 and then lifted by a moving pump. The problem is the large space requirement of the longitudinal flow pool, the surface activation and the removal of residual water content.

It is an object of the present invention to provide an apparatus for sedimentation of liquids containing iron from revolutionary iron, in particular slurries, which allows for substantially more efficient sedimentation than is available with conventional longitudinal flow basins or deep shafts, and which can be operated continuously.

The present invention is based on the discovery that the settling of shredder liquids can be effectively solved in a non-used vertical flow hydraulic sedimentation plant if its basin area is divided into communicating basins such that, due to the geometric design, it is chosen as a function of the contamination to be settled. By creating flow cross sections, a fluid flow of varying direction and velocity is created in the apparatus, leading to the required sedimentation.

Based on the above recognition, the object of the present invention is achieved by means of an apparatus having a settling room, a settling liquid in the settling space delivery means, a cleaned water and a sediment removal device, and characterized in that the settling space is downwardly downward. a cross-sectional, preferably rotational, outer wall, enclosed by a bottom bottom plate, closed in an upper open pool, in which a central discharge tube is mounted, the lower end of which is spaced apart from the bottom plate and the upper end extends above the fluid level of the pool and the pelvis its lower region, starting from the lower end of the discharge tube, has a downward cross-section to a greater extent than the extent of the cross-sectional area between the pelvis and the discharge tube; a channel for introducing the material to be settled into the discharge tube in the vicinity of the fluid level, preferably above the liquid level; to the outside of the discharge tube, a downward and inwardly facing wall extending from the upper surface of the upper wall of the upper part of the basin extending downwardly with the discharge tube downwardly defining a cleaned water area, and having a collecting duct with a damping level bearing in the upper end of the inner wall. extending through the separating wall between the discharge tube and the inner wall in the purified water space, along which a feed trough, preferably provided with a leveling flange, extends from the collecting vessel and for removing the purified water from this divider wall. on the side opposite to the feed trough, immersed in the purified water space

There is a pump 206 460 Β. So the sedimentation takes place in interdependent spaces connected to the hydraulic booms and the non-susceptible large and / or medium-sized dirt particles (granules) settle. They can be lifted with a grabber to a drain, from which the water trickles back into the drain pipe. The fine particles fall down along the inner surface of the pelvic wall, and the grabber together with the coarse grains also emphasize them.

A preferred embodiment of the apparatus is that a filter basket is removable and removable in the discharge tube under the insertion site of the inlet channel. This filter cart will filter out the toughest, most granular reved pieces and any debris; water, on the other hand, picks up the basket.

According to a further aspect of the invention, the outer wall, the inner wall and the basin bounded by the discharge tube are firstly inclined upward and then decreasing in cross-section such that the cross-section of the inlet cross-section of the basin is first 20.0-100.0%. and the exit cross-section decreases to 15.0-45.0% of the entry cross-section.

It is also preferred that the sludge traps formed between the sludge walls are located in the lower part of the cleaned water space; in this case, it is preferred that the height of the sludge walls be less than one third of the depth of the purified water space.

Finally, it is advantageous if the discharge tube, the pool and the cleaned water area are circularly symmetrical and the latter is conical.

The invention will now be described in detail with reference to the accompanying drawings, in which a preferred embodiment of the apparatus is provided. In the drawings, the device shown in Figure 1 is a section taken along the line F-F in Figure 4; Figure 2 is a sectional view taken along line A-A in Figure 1;

Figure 3 is a sectional view taken along line B-B of Figure 1;

Figure 4 is a sectional view taken along line C-C in Figure 1;

5a. Figure 5b shows a larger scale of the reversing basket in FIG. FIG.

5b. FIG. FIG.

As shown in FIG. 1, the apparatus has a basin (2b) having an outer wall having a downwardly transverse cross-section (2b) of downward cross-section, indicated by reference numeral (2), the vertical geometric center axis of which is denoted by reference letter (X). In the basin (2), a cylindrical bottom-opening (31) discharge tube is mounted, which is also (X) vertically geometric, with a lower edge above the bottom plate (2) of the basin (2a). The inlet conduit (1) in the upper part (1) of the discharge tube (31) extends over the filter basket (53), which fills the entire cross-section of the discharge tube (31), and a preferred embodiment thereof will be described in detail later. The outer surface of the discharge tube (31) is provided with a tapered (4) inner wall facing upwards and inwards, with a collecting channel (36) running in the upper rim (see also Figure 4). The lower end of the inner wall closes at a distance (Λ /) above the bottom plate (2) of the basin (2a) to the outside of the discharge tube (31), and M> tn (Figure 1), preferably M = 2 m. The inner wall (4), the inner wall of the collecting vessel (36a), and the outer surface of the discharge tube (31) together define the cleaned water space (37), which has a substantially downwardly decreasing triangular cross-section, and in the lower part, there are sometimes h height (42) slurry walls (see also Figure 3), which are vertical, and their height h is about 1/4 to 1/3 of the height H of the purified water space (37). In one place, a vertical (41) closure wall extending up to the full height of the purified water space (37) is also incorporated into the purified water space (37), with a radial (5) feed trough (1 and 4) at one end thereof. Fig. 1A), which is the distance between the discharge tube (31) and the collecting channel (36), which extends from the latter. On the side opposite to the feed trough (5) on the side of the divider (41), i.e. the direction of flow indicated by the arrows (37) prevailing in the purified water space, the pump (41) is first pumped (52) (4 and 1). Behind it is the radial (43) bumps, and behind the bumps (43) there is an oil retaining wall (44) parallel and parallel to it. The suction area between the bumps (43) and the bayonet wall (41), where the pump (52) extends, is reference numeral (39), and in Figs. marked with a number. The appliance is also equipped with a desiccator (45) and a gripper (51) (Fig. 1).

5a. and 5b. Figures 1 to 5 show a larger embodiment of the filter basket shown in Figure 1 as a whole (53). According to this, the filter cages (53) have a support frame (54) made of steel, the perforated bottom plate (55) is formed by a steel sheet, and a grid (56) made of steel (54), for example, is welded to the lower half of the support frame (54). A lifting tab is attached to the upper end (57) of the support frame (54). The filter basket (53) lies on or rests on the shoulder (31a) protruding inwardly from the wall of the discharge tube (31) with the flange (53a).

1 to 5b. Figs.

The sedimentation slurry or water to be settled, as shown in Figure 1, is fed to the filter basket (53) through the passage (21) into the filter basket (53), which grips the coarser hollow pieces and any other material or debris. Liquid thus released from the toughest impurities flows downwardly in the discharge tube (31) in the downward direction of the arrows and at the lower end of the tube, starts to flow outwards and upwards as indicated by the c arrows. Medium-sized reversed pieces, which pass through the filter basket apertures (53)

HU 206 460 ottak in the collecting chamber (33) in the lowest (33) range of the smallest diameter of the basin (2); this depleted, moderately dirty impurity is indicated by reference numeral (22) in Figure I. [Note that the collection space (33) extends from the lowest diameter d _{2 to} the d _{ diameter at the lower edge of the discharge tube (31), where the wall (2b) is curved twice curved. The upper end of the purified water space (37) is then further expanded to d ₃ with the diameters, i.e., the markings in Figure 1: d ₃ > d _t > d _2. 51) with the gripper removed from the collecting area (33) and placed in the desiccator (45), from which the water flows back into the discharge tube (31) according to the arrow (20).

Water (22) released from medium-sized dirt (reve) but still containing many floating dirt (revs) flowing upwards in accordance with the arrows (c) and the arrows (Figure 1) is the outer wall (2) of the pool (2b) and the drain (31). the pipe (4) is placed in a settling space (34) delimited by an inner wall and extending upwards from the lower edge of the discharge tube (31) and then narrowing. In this settling space (34), the fluid flow is slowed down to a great extent, so that the fine floating ridge is released from the liquid and sinks along the inner surface of the outer wall (2b) and collects in the settling space (32) under the settling space (34). This settled fine contamination is indicated by reference numeral (23) in Figure 1 and hatched. In Figure 1, it is clear that this fine dirt (23) flows into a set of medium dirt (22), so that if the gripper (51) removes this set, fine (23) is applied. contamination flows into the place of the removed material, the two impurities are mixed with two types of rupture, and the gripper (51) lifts and blends this mixed material into the desiccator (45).

According to the arrows c (Fig. 1), the upward flow of water from the through space (35) passes through a leveling drop (/ arrows, Figs. 1 and 4) into the collecting channel (36) running in the circle; Figure 1 shows the water level v in the through space _; marked with a reference letter. From the collecting vessel (36), the water flows into the feed trough (5) extending along the radial (41) through the opening (5), in accordance with the g arrows (5), and from the feed trough (5) to the feed trough (5). (37), in which the water flows in the direction indicated by arrows. The fine floating dirt is

Figure 1 shows a sludge trap (25) in sludge trap (25) bounded by radial (42) slit wall walls, which can sometimes be removed by, for example, pumping (slurry pump). Pure water (37) is removed from the cleaned water (37) by means of pump (52). The oil from the reed can be extracted from the liquid surface in the purified water space (37).

An advantage of the invention is that it is possible to efficiently dispose of wastewater and slurries containing metallurgical rolls which are otherwise difficult to settle and treat.

The invention is, of course, not limited to the embodiment of the apparatus described in detail above, but can be implemented in a variety of ways within the scope of the claims.

Claims (8)

PATENT CLAIMS An apparatus for settling slurry and / or water from a metallurgy containing a flake, comprising a settling chamber, a means for introducing the liquid to be settled into the settling chamber, and a means for removing purified water and sediment, characterized in that the settling chamber is preferably a rotatable surface in a pool (2) enclosed by an outer wall (2b) and closed at the bottom by a bottom plate (2a), in which a central drainage tube (31) is inserted, the lower end of which is spaced over the bottom plate (2a) ) and its upper end extends above the liquid level (v ₂ ) of the basin (2) and the lower region of the basin (2) is formed downwardly from the lower end region of the drain pipe (31) to a greater extent than the cross-sectional area between the basin (2) and the drainage tube (31) e decreases; the channel (1) for settling the material into the drainage pipe (31) extending around the liquid level (v ^), preferably above the liquid level (v ^); the outer wall (2) of the upper part of the pool (2) 2b) an inwardly facing downward and inwardly facing inner wall (4) adjacent to its upper surface, defining a downstream purified water space (37) with a drainage pipe (31), and having a damping leveling recess in the upper end region of the inner wall (4); and a divider-locking wall (41) extending between the drainage pipe (31) and the inner wall (4) in the purged water space (37), along which a feed trough (5) is provided, preferably with a leveling roller (5). ) extends from the collecting trough (36) and a solution opposite the feed trough (41) for removing purified water There is a pump (52) submerged in the purified water space (37). Apparatus according to claim 1, characterized in that the means for removing sediment is a grab (51). Apparatus according to claim 1 or 2, characterized in that a filter basket (53) which is removable and removable is provided in the drainage tube (31) below the insertion point of the inlet channel (1). 4. Apparatus according to any one of claims 1 to 3, characterized in that the sprayed dewatering (45) has a dewatering large and / or medium grain sediment. 5. Apparatus according to any one of claims 1 to 4, characterized in that the pool space delimited from below upwards by a laterally upwardly and then decreasing cross section of the pool wall defined by the outer wall (2b), the inner wall (4) and the drain pipe (31). relative to the cross section EN 206 460 Β increases to 20.0-100.0%, and the exit cross-section decreases to 15.0-45.0%. 6. Apparatus according to any one of claims 1 to 3, characterized in that the lower part of the purified water space (37) has sludge traps (38) formed between sludge traps (42). Apparatus according to claim 6, characterized in that the height of the sludge retaining walls (42) is less than one third of the depth of the purified water space. 8. Apparatus according to any one of claims 1 to 3, characterized in that the drain pipe (31), the basin (2) and the purified water space (37) are circularly symmetrical and the latter is conical.