CN2124754U - Dewatering equipment for slurry-solid separation - Google Patents

Abstract

The utility model relates to a novel dewatering equipment that is used for material thick liquid-solid separation. The method is characterized in that a cylindrical vertical dehydration device with the height of 10-30 meters is adopted, the upper part of a column is a sedimentation separation area shaped like a thickener, the column body is a cylindrical cylinder, and the lower part of the column is connected with a conical cylinder with the filtering function. The equipment has the dewatering functions of settling separation, concentration, compression, filter pressing and the like, and has the advantages of simple structure, convenient operation, low energy consumption and the like, and the solid concentration of the dewatered material can reach 78-85%. The method can be widely used for liquid-solid separation of certain slurry in various industrial departments such as filling mining, mineral separation, metallurgy, chemical industry, coal and the like.

Description

Dehydrating equipment for liquid-solid separation of slurry

The utility model is a kind of dehydration equipment that relates to the liquid-solid separation field of slip, is used for the separation between the same water of solid particle (or solution) of slip, can be widely used in the deep dehydration of some slip of many industrial departments such as metallurgy, chemical industry, coal.

The liquid-solid separation of slip is requisite a kind of unit operations in the many production processes of industrial department.Existing liquid-solid separation equipment kind is a lot, wherein Chinese patent invention disclosed name is called low bed layer high-efficient washing tower and the application (CN87103513A) thereof that is used for slip, this scrubbing tower is mainly by downflow weir, the self-circulation type flocculator, tower top expanding reach, the tower main body, conical bottom, formations such as underflow blow-off valve, it is characterized in that using low bed layer, short tower, total tower height degree is a 25-5 rice, the concentrated phase section highly is 05～15 meter, the self-loopa flocculator is installed in expanding reach, with from the check sparge pipe, intake with pulse mode, and adopt secondary to flocculate the Separation of Solid and Liquid and the washing that can be used for leaching ore pulp.The major function of this equipment is the washing that is used for material, and liquid-solid separation function is relatively poor, the underflow solid concentration only is 55～65%, the water separation capability that only is equivalent to general concentrator, to further dewater and to satisfy the requirement of some industrial department, in the flocculator of this short scrubbing tower mechanically operated agitating device is housed in addition.For reaching the washing purpose, at its body of the tower hypomere (concentrated phase section) 1-3 layer water-distributing device is housed also, carry washing agent in the tower, cause its complicated operation, shortcoming that consumption of power is big.

The purpose of this utility model be to provide a kind of simple in structure, easy and simple to handle, energy consumption is low and dehydration (liquid) ability strong liquid-solid separatory dehydration equipment.

Fig. 1 is a dehydration equipment general structure schematic diagram of the present utility model.

Fig. 2 is a dehydration equipment post of the present utility model upper end enlarged structural representation.

Fig. 3 is a dehydration equipment post of the present utility model lower end cone-shaped filter structural representation.

The utility model essential implementation is: (1) adopts the column type structure, use high stock column can apply a kind of enough big pressure to the dehydration of material, played the effect of strengthen dewatering, (2) in expansion district, the upper end of post, be provided with the feeding buffer device of a bell cover structure and the adding apparatus of a flocculating agent, the kinetic energy that slip is had exhausts at this, and make tiny suspended solid flocculation agglomerating, and accelerate sedimentation, guarantee the overflowing liquid clear; (3) connecting a cone-shaped filter in the lower port of cylinder becomes a fillter section, and to realize the deep dehydration of material, its bullet filtering material is made by poromerics.

Below in conjunction with accompanying drawing the present invention is elaborated.

Accompanying drawing 1 is a general structure schematic diagram of the present utility model.(1) is the enlarged of post among the figure, the likeness in form concentrator, and (2) are bell jars, (3) be shaft, be divided into sedimentation separation district (I), dense district (II), compressional zone (III) from top to bottom, (4) are following awl filters, it comprises a filtering area (IV), and (5) are the flocculant head tanks, and (6) are downflow weirs, (7) be the overflow effuser, (8) be pulp-inlet pipe, (9) are flowmeters, and (10) are level-sensing devices, (11) material level display instrument, (12) are the underflow blow-off valves.

Accompanying drawing 2 is structural representations of the utility model dehydration equipment top enlarged, describes the structure of flocculant liquid distributor and bell jar.(2-1) is the agent inflow entrance of wadding a quilt with cotton with fixed attention among the figure, (2-2) is conical hopper, (2-3) is flocculant cloth liquid groove, it is to be the center of circle with the funnel, be engraved in minor groove radially on the bell jar top, (2-4) is bell jar, its available metal material (as general steel plate or corrosion resistant plate) is made, and also can be made by nonmetallic materials (as engineering plastics).The size of bell jar is big or small closely related with enlarged, and bell jar diameter and enlarged diameter ratio are advisable with 1:35～1:6, and the best is 1:4.The height of bell jar is highly equal with the straight tube of enlarged, and wall thickness is 10～20 millimeters, and (2-5) is the brace rod of bell jar, and available metal material or nonmetallic materials are made, and the connected mode of rib two ends and wall can be welding, also can be that bolt connects.(1) be the enlarged of post, (3) are shafts.Shaft is advisable than with 1:24～1:28 with the diameter of enlarged, and the best is 1:26.The diameter of shaft is to decide according to treatment scale, can change in 05～3 meter scope, and shaft links to each other by a tapered cylinder with enlarged; Cone angle (α) is advisable with 45～60 degree; The main part of pillar can be rolled by metal material (as steel plate) and be welded, and also can make with armored concrete, and the total height of post is 10～30 meters scopes, best 20 meters.(8) be pulp-inlet pipe.(2-6) is the brace rod of pulp-inlet pipe, is fixed on the bell jar inwall, and muscle can be fixed with welding or bolt mode.

Accompanying drawing 3 is structural representations of the cone-shaped filter of dehydration equipment post of the present utility model lower end connection.(4-1) is the filter of being made by poromerics among the figure, it can use metal material (as micropore titanium material), also can make with nonmetallic materials (as the corundum ceramic poromerics), (4-2) is chuck, (4-3) is anti-blowpipe, can advance compress wind or water under high pressure by anti-blowpipe, blowback regularly, clear up blocking microporous dirt, (4-4) is the discharge piping of filtrate, and (4-5) is upper flange, and (4-6) is lower flange, should be consistent with the material of filter body with the upper-part Material Selection, be that main body is a metal, then these parts are metal, if main body is nonmetal, then these parts are nonmetal, these six parts are if adopt metal material to connect into an overall structure by welding method, form general cone back cut diameter size and shaft equal diameters if adopt non-metal stupalith then can integral body to fire, the cone lower port diameter is generally 50～200 millimeters, is good with 100 millimeters.The cone angle of this filter (β) is advisable with 15～45 degree, and the best is 30 degree.

The utility model is one 10～30 a meters high cylindrical structure pillar dehydration equipment (see figure 1).The top of post is the enlarged of likeness in form concentrator, be referred to as the sedimentation separation district, its periphery has an annular downflow weir, centre bit in this district is equipped with the device (see figure 2) of a bell-jar, and the bell jar the inside is stretched in the outlet of feed pipe, and exit face is to the roof of bell jar.The lower end in sedimentation separation district connects one high tens meters pillar cylinder, and gradually dewater therein by enrichment, compression for the solid material that is got off by the Disengagement zone.The lower end of cylinder connects a tapered cylinder (see figure 3) of being made by the poromerics with filtration, the material after the compressed dehydration enters this district and is subjected to filter pressing, obtain deep dehydration, the water of deviating from herein (or solution) collects in the chuck and is discharged by effuser, an anti-blowpipe also is housed on effuser, can advance compress wind or water under high pressure by this pipe, blowback regularly is with the mediation micropore, and the circular cone lower end is connected with the blow-off valve of adjustable throttle amount.At capital a constant current head tank is housed, interior Sheng flocculating agent.Can be quantitatively in the suspension of bell-jar surrounding the distributing flocculating agent.

The operation principle and the method for operation of this equipment are: when pending slip is entered in the bell jar by the top that pump pumps into post, have very the slip of kinetic energy and run into the bell jar inwall, its kinetic energy is consumed rapidly, so most solid particles are in this rapid sinking, water (or solution) is carried subparticle secretly and is outwards upwards turned over along the bell jar periphery and gush, meet with the flocculant that plants by head tank, and fully mixed, subparticle is flocculated into big granule by flocculant this moment, sinking speed is significantly accelerated, and also sinks rapidly, is separated with water (or solution), isolated water (or solution) is with radial peritropous downflow weir diffluence, drains into outside the post after entering downflow weir.Solid particle sinks rapidly, progressively obtains enrichment, compression in the sinking process, and the water of extruding in this process (or solution) adverse current also makes progress, compiles and discharged by the downflow weir on top.Material after the compressed dehydration is moved downward to the tapered cylinder filtering area.Material further is subjected to filter-press dehydration at this, is discharged by the underflow blow-off valve then, and the water that press filtration is deviate from then comes together in the chuck of tapered cylinder, is discharged by effuser, converges with overflow.

An electromagnetic flowmeter is housed on feed pipe, can measures feed rate and cumulant; A level-sensing device is equipped with at solid-liquid interface place on enrichment region, the interface is monitored, and for controlling the interface on predefined position, but automatic or manual is regulated the aperture of underflow side, adjust the underflow discharge velocity, the interface is maintained on the position that sets in advance all the time.

The utility model utilizes the height of pillar, make dehydrated slip in post, form a very high continuous stock column, produce a bigger hydrostatic head, utilize this hydrostatic pressure in post, to strengthen dehydrations such as enrichment, compression, filtration on the solid material, thereby reach the dehydration actual effect of strengthening this equipment.Also in order to overcome the drag losses of underflow blow-off valve and pipeline, make discharge unblocked simultaneously, guarantee that discharge is continuous, automatic, stable.Finish above-mentioned steps, need not outside provide the new energy, thereby can reduce operation consumption, reduce cost.

The utility model utilizes the hydrostatic pressure of material in the post to combine with selecting micropore sepage material to do down awl, produces a press filtration district in the bottom, compressional zone of pillar, realizes the deep dehydration to material.The big I of the filter area in press filtration district requires to select according to material properties with to the underflow solid concentration, may diminish to zero, can not establish the press filtration district, also can be greatly to whole lateral areas that can utilize tapered cylinder, to satisfy multiple dehydration requirement.

This equipment has reduced investment, floor space is few, operating cost is low, power consumption is little, simple in structure, need not mechanical driving device, easy to make, advantage such as operation is continuous, efficient is high, easy operating, working condition are good.This equipment can be widely used in the dehydration of some slip of many industrial departments such as mining with stowing, ore dressing, metallurgy, chemical industry, coal, be particularly suited for the full tailings dehydration in the complete tailing-filled mining methods of modern high concentration, can replace band filter or concentrator--the vacuum filter that existing investment is big, operating cost is high, floor space is big, operating maintenance is difficult, have application promise in clinical practice.

Embodiment:

Designed the dehydration column of φ a 1000 * 20000mm according to the present invention.The shaft diameter is 1000 millimeters, 2600 millimeters of 20000 millimeters enlarged diameters of height overall, and enlarged is 26 with the shaft diameter ratio, and enlarged links by tapered cylinder with shaft, and cone angle (α) is 60 degree.The cylindrical portions may height of enlarged is 1200 millimeters, and the bell jar diameter is 610 millimeters, and it is 1:426 with the diameter ratio of enlarged, and the height of bell jar is 1200 millimeters, and feed tube diameter is 100 millimeters of φ.An electromagnetic type mineral slurry flux meter is housed in the feed pipe, and the solid-liquid interface of shaft is surveyed and is selected a gamma-radiation level-sensing device for use, and whole cylinder all adopts the ordinary carbon steel coiled sheet system of 10 millimeters thick to be welded.The part that local pressure is big adopts the stiffener thickening of 10 millimeters thick.

Filter adopts corundum microporous material, and integral body is fired and formed, and the filter area of filter is 26 square metres to the maximum, and cone angle is 30 degree, and last lower flange by filter and shaft and drainage conduit link.When selecting filter area to be zero, then integral body unloads filter, replaces with an onesize tapered cylinder that also has lower flange, and this tapered cylinder also adopts the ordinary carbon steel coiled sheet system of 10 millimeters thick to form.

Testing used material is the mine tailing slurry in China ore dressing plant.Its size distribution is as follows:

Grade (mm) percentage composition (%) cumulative percentage content (%)

＋0·246 17·51 17·51

－0·246～＋0·147 8·82 26·33

－0·147～＋0·104 25·40 51·73

－0·104～＋0·074 7·46 59·19

－0·074～＋0·043 8·92 68·11

－0·043～＋0·038 4·96 73·07

－0·038 26·93 100·00

9～10 meters of input concentration 28～40%, feed rates ³/ time, flocculant are selected homemade non-ionic polyacrylamide, molecular weight M 〉=3 * 10 for use ⁶, the dried mine tailing of consumption 10 gram/tons, dense district+compressional zone is 7 meters, its result is:

The overflowing liquid clear:

200 tons/meter of disposal abilities ²Day;

The underflow solid concentration when filtering surface is long-pending when being zero, reaches 78～80%, is 26 meters when filtering surface is long-pending ²When (being that lower cone is a filtering area), reach 83～85%;

33 kilowatt-hours of/ton dried mine tailings of energy consumption;

067 yuan of/ton dried mine tailing of operating cost (by market price in 1991).

Claims (4)

1, the utility model is the dehydration equipment of the liquid-solid separation of a kind of slip, is interconnected to constitute by upper end enlarged [1], pulp-inlet pipe [8], downflow weir [6], overflow effuser [7], the underflow blow-off valve [12] of flocculant head tank [5], post, it is characterized in that:

A. dehydration equipment of the present utility model is divided into sedimentation separation district, dense district, compressional zone and filtering area from top to bottom, and the equipment total height is 10～30 meters;

B. in the enlarged of the upper end of post, be provided with a bell jar, pulp-inlet pipe is placed in the bell jar, the diameter of bell jar and post upper end enlarged diameter ratio be advisable in 1: 3.5～1: 6, the height of bell jar and post upper end enlarged straight highly equate 10～20 millimeters of wall thickness;

C. the lower port at shaft [3] connects a cone-shaped filter [4], this cone-shaped filter by parts such as filter, chuck, anti-blowpipe, filtrate discharge piping flanges by welding (or the integral body is fired) structure that forms a whole, its cone back cut diameter and shaft equal diameters, cone lower port diameter are generally 50～200 millimeters.

2, liquid-solid separating and dehydrating equipment according to claim 1 is characterized in that said equipment total height is good with 20 meters, and the diameter of shaft is good with equipment total height ratio for 1:20.

3, liquid-solid separating and dehydrating equipment according to claim 1, the diameter and the post upper end enlarged diameter ratio that it is characterized in that said bell jar are good with 1:4, the material of bell jar can select for use metal material (as general steel plate or corrosion resistant plate) to make, and also available nonmetallic materials (as engineering plastics) are made.

4, liquid-solid separating and dehydrating equipment according to claim 1, its cone angle of cone-shaped filter that it is characterized in that said post lower end is advisable with 15～45 degree, the best is 30 degree, the cone lower port diameter is good with 100 millimeters, the big I of filter area is selected according to actual material properties with to the requirement of degree of dehydration, can arrive zero.

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