CN102139169A - Precipitating device, precipitating method and system comprising precipitating device - Google Patents
Precipitating device, precipitating method and system comprising precipitating device Download PDFInfo
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- CN102139169A CN102139169A CN2010101050194A CN201010105019A CN102139169A CN 102139169 A CN102139169 A CN 102139169A CN 2010101050194 A CN2010101050194 A CN 2010101050194A CN 201010105019 A CN201010105019 A CN 201010105019A CN 102139169 A CN102139169 A CN 102139169A
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Abstract
The invention discloses a precipitating device, a precipitating method and a system comprising the precipitating device. The precipitating device comprises a precipitating component arranged in a container, a precipitating area of the precipitating component and a solid-liquid separation area formed between the precipitating component and the container, and a liquid outlet located at the upper part of the container, wherein the ratio of the diameter of the container to the diameter of the precipitating component is about between 1.5 and 2.8. At the same time, the invention also relates to a related method and the system comprising the precipitating device.
Description
Technical field
The present invention relates to liquid handling device, method and contain the system of this device, particularly relate to settler, method that is used to reduce the solution salt content and the system that contains this settler.
Background technology
Solution, the dope that for example comes from wastewater treatment equipment/light salt water desalter (as ultracapacitor desalter or pole-reversing electroosmosis device), before recycling, generally need handle, by removing or reducing salt (including but not limited to sodium chloride, magnesium sulfate, calcium sulfate and bicarbonate) and reduce salt content.
Precipitation is a kind of method that reduces the solution salt content.But traditional settler is mainly used to obtain the crystal of desirable certain quality, and they or complex structure perhaps need move under high temperature or negative pressure, so they involve great expense and/or need higher operating cost.
Therefore, be necessary to develop settler, method and the related system of new reduction liquid salt content.
Summary of the invention
The settler, method and the related system that the purpose of this invention is to provide a kind of new reduction liquid salt content.
On the one hand, the settler that the present invention relates to comprises: place the precipitation parts of container, be formed at the precipitation zone of precipitation parts and the Separation of Solid and Liquid zone between precipitation parts and the container, and the liquid outlet that is positioned at container top.Wherein, the ratio of container diameter and precipitation parts diameter is between 1.5 to 2.8.
On the other hand, the present invention relates to comprise the system of settler recited above, this system also comprises to settler to be provided for the liquid stream of precipitation and from the desalter of settler reception from the liquid stream of liquid outlet.
On the other hand, the present invention relates to a kind of method comprises: a kind of settler is provided, this device comprises: places the precipitation parts of container, is formed at the precipitation zone of precipitation parts and the Separation of Solid and Liquid zone between precipitation parts and the container, and the liquid outlet that is positioned at container top.Wherein, the ratio of container diameter and precipitation parts diameter is between 1.5 to 2.8; Provide one flow therefrom to separate out solid matter to precipitation zone; Make under the solid deposits by gravity in the Separation of Solid and Liquid zone; Discharge second strand of liquid stream that salt content is lower than one flow by liquid outlet.
Settler involved in the present invention, method and related system can reduce the salt content of solution at lower cost with simple mechanism.
Description of drawings
Be described for embodiments of the invention in conjunction with the drawings, the present invention may be better understood, in the accompanying drawings:
The schematic diagram of the settler that Fig. 1 is according to an embodiment of the present to be provided;
Fig. 2 is the schematic diagram that comprises the desalination system of settler and ultracapacitor desalter among Fig. 1;
Fig. 3 is the schematic diagram that settler and pole-reversing electroosmosis device are used among Fig. 1;
Fig. 4 is the schematic diagram that settler and desalter, vaporising device and crystallizer are used among Fig. 1;
Fig. 5 is the schematic diagram of the settler that provides according to another kind of embodiment of the present invention;
Fig. 6 is the schematic diagram of the settler that provides according to the third embodiment of the present invention;
Fig. 7 is the schematic diagram according to the 4th kind of settler that embodiment provided of the present invention;
Fig. 8 is the schematic diagram according to the 5th kind of settler that embodiment provided of the present invention;
Fig. 9 is the schematic diagram according to the 6th kind of settler that embodiment provided of the present invention;
Figure 10 is the schematic diagram according to the 7th kind of settler that embodiment provided of the present invention;
Figure 11 is the schematic diagram according to the 8th kind of settler that embodiment provided of the present invention;
Figure 12 is the cutaway view of employed settler in experimental example;
Shown in Figure 13 is the operation schematic diagram of settler among Figure 12.
The specific embodiment
Approximate term in specification and the claim is used for modifying quantity, and expression the present invention is not limited to this concrete quantity, also comprises the part of the correction of the change that can not cause relevant basic function with approaching acceptable of this quantity.Accordingly, modify a numerical value, mean and the invention is not restricted to this accurate numerical value with " approximately ", " pact " etc.In some example, approximate term may be corresponding to the precision of the instrument of measuring numerical value.In addition, the number of elements that unless specifically stated otherwise, this paper are mentioned both comprised single also comprise some.
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.In Fig. 1 to Fig. 4, identical label is represented components identical.In the explanation hereinafter, will can not describe well-known function and structure in detail, to avoid becoming pondered-over because of unnecessary details makes the present invention.
The schematic diagram of the settler 12 that Fig. 1 is according to an embodiment of the present to be provided.This settler 12 comprises: places the precipitation parts 21 of container 20, is formed at the precipitation zone 24 of precipitation parts 21 and the Separation of Solid and Liquid zone 200 between precipitation parts 21 and the container 20, and the liquid outlet 28 that is positioned at container 20 tops 45.Precipitation zone 24 receives first strand of salting liquid 16, and separates out solid matter (not shown) from this salting liquid, and Separation of Solid and Liquid zone 200 makes solid matter get off by gravitational settling.Salt content is lower than second strand of liquid 17 of first strand of liquid 16 by liquid outlet 28 outflows in the Separation of Solid and Liquid zone 200.
The salt content of second strand of liquid 17 is subjected to the influence of many factors, for example: the structure of settler 12.Precipitation parts 21 and container 20 tops 45 are hollow cylinder.Precipitation parts 21 comprise a lower openings 201 that communicates with container 20.The upper opening 202 that communicates with the lower openings 201 of precipitation parts 21 communicates with container 20.In certain embodiments, the liquid of per unit cross-sectional area or solidliquid mixture flow are about every square feet of 0.12 to 0.48 gallon of per minute, perhaps about 8.2 * 10 in the Separation of Solid and Liquid zone
-5To 3.3 * 10
-4Every square metre of cubic meters per second.The ratio of the diameter D on container 20 tops 45 and precipitation parts 21 diameter D1 is between 1.5 to 2.8, or between 1.6 to 2.2.In illustrated embodiment, the bottom of container 20 is tapered, and cone angle is spent between 120 degree about 60.The ratio of container height H and diameter D is about more than 0.2.
In some non-limiting example, container 20 can be other shape, for example full cylinder.Equally, precipitation parts 21 also can be other shapes, and are for example conical.
In the embodiment shown in fig. 1, the partition member 22 that is arranged in precipitation zone 24 to small part forms separated region 220, and this zone communicates with precipitation zone 24 and Separation of Solid and Liquid zone 200.Partition member 22 comprises two openends, and is the unified hollow cylinder of diameter.
In addition, an agitating device 23 extends to flowing with liquid (perhaps solidliquid mixture) in promotion precipitation zone 24 and the separated region 220 in the separated region 220.The flow direction that agitating device drives liquid (perhaps solidliquid mixture) can be from the top down or from bottom to top.
The ratio of the diameter D2 of agitating device 23 impellers 230 and the diameter D of container 20 is between 0.2 to 0.4.The ratio of the diameter D2 of the diameter Dc of partition member 22 and agitating device 23 impellers 230 is about greater than 1.0 smaller or equal to 2.0.In certain embodiments, impeller 230 is marine impellers of 1/4th that diameter is about container 20 diameters.In certain embodiments, impeller 230 is cross-helicity oar formula prismatic blade impellers that diameter is about container 20 diameters 1/3rd.In certain embodiments, impeller 230 is by 2 to 6 aial flow impellers that blade is formed.
Fig. 2 is the schematic diagram that comprises the desalination system 10 of settler 12 and ultracapacitor desalter 100 among Fig. 1." ultracapacitor desalter " speech typically refers to and is used for seawater desalination or other brackish water deionizations and produces the ultracapacitor that uses institute's permission level so that the quantity of salt or other ionized impurities is reduced to life.
In some applications, the ultracapacitor desalter comprises one or more ultracapacitor desalination unit (not shown).In non-limiting example, each ultracapacitor desalination unit comprises pair of electrodes, dividing plate and a pair of collector that links to each other with electrode respectively at least.When a plurality of ultracapacitor desalination unit are deposited in when using simultaneously together, the polylith insulating barrier may be placed between every pair of adjacent ultracapacitor desalination unit.
In an embodiment of the present invention, collector may link to each other with the both positive and negative polarity of power supply (not shown) respectively.Because electrode links to each other with collector respectively, electrode can play the effect of anode and negative electrode respectively.
When ultracapacitor desalter 100 entered charged state, the inlet flow 13 that comes from liquid source (not shown) entered ultracapacitor desalter 100 by valve 110 and carries out desalination.Under this state, inlet flow 17 enters the flow path of ultracapacitor desalter 100 and is closed by valve 110.Be deposited in the surface of anode and negative electrode respectively from the positive and negative charge of power supply, from Ionized inlet flow 13, attract anion and cation, make them be attracted to the surface of anode and negative electrode respectively.The electric charge that is deposited in anode and negative electrode makes and for example passes through the liquid stream 14 that valve 111 flows out from ultracapacitor desalter 100 by output stream that salt content (concentration of salt or other ionic impurities) is compared lower with inlet flow 13.In certain embodiments, the output of desalination stream 14 may be by another desalter or again by ultracapacitor desalter 100 deionization desalination once more.
When ultracapacitor desalter 100 entered discharge condition, the anion of absorption and cation left the surface of anode and negative electrode respectively.Inlet flow 17 is imported ultracapacitor desalters 100 through filter 19 and valve 110 from settler 12 by pump 18, thereby takes away ion (anion and cation).Through the output stream 16 that valve 111 flows out from ultracapacitor desalter 100, salt content (concentration of salt or other ionic impurities) is compared higher with inlet flow 17.Under this state, inlet flow 13 enters the flow path of ultracapacitor desalter 100 and is closed by valve 110.Filter 19 can filter some particulates, to avoid stopping up ultracapacitor desalter 100.In some applications, also can not establish filter 19.
After the discharge of ultracapacitor desalter finished, this device entered the charged state of a period of time, for discharge is subsequently prepared.That is to say that the charging of ultracapacitor desalter and discharge are mutually alternately to handle inlet flow 13 and 17 respectively.
Under discharge condition, when liquid flowed in the ultracapacitor desalter, salinity or other ionic impurity concentration increased in the liquid, thereby the tendency of the precipitation of forming is arranged.Settler 12 was used for before liquid 17 flows into ultracapacitor desalter 100 from settler 12, from first strand of liquid 16, separate out solid matter, and make them be deposited to the bottom of container 20 by gravity, thereby isolate the salt that a part separates out or the particle (solid matter) of other impurity.
As shown in Figure 2, output stream 16 flows into precipitation zone 24 from the upper ends (not label) of precipitation parts 21 and separates out solid particle (not shown), disperses to enter Separation of Solid and Liquid zone 200 from the lower openings 201 of precipitation parts 21 and/or upper opening 202 then and carries out Separation of Solid and Liquid and circulation.Liquid (the perhaps mixture of liquid and solid) flows along the direction shown in the arrow 102.Diameter greater than special diameter separate out solid particle will by the gravity effect be deposited to container 20 than lower part.Other diameters are dispersed in the liquid less than the solid particle of separating out of special diameter.
When the discharge capacity sum of precipitation capacity and discharge stream 27 equals the charged species removal amount of inlet flow 13, charge-discharge cycles reaches balance, saturated or the degree of super saturation of the liquid that circulates between ultracapacitor desalter and settler will be stablized, and forms dynamic equilibrium.
In certain embodiments, liquid or solidliquid mixture (circular flow) that the device 25 that contains pump also can be used to make a part come from container 20 bottom cycle refluxing openings 46 pass through valve 26, and enter precipitation zone, thereby promote flowing of liquid in precipitation zone 24 and the separated region 220 or solidliquid mixture.After particle reduced in precipitation zone, the particle in a part of circular flow can be used as the seed particles that causes more precipitations in precipitation zone 24.During the circular flow operation, valve 26 cuts out the flow path of discharge stream 27.
In certain embodiments, can not use partition member 22.Similarly, in certain embodiments, can there be agitating device 23 and/or pump 25.
In certain embodiments, the energy that discharge condition discharged can be used to drive electrical equipment (not shown), and for example bulb perhaps can be reclaimed by for example two-way DC-DC converter and so on energy recycle device.
In other non-restrictive example, use similar to several ultracapacitor desalination unit stacks, ultracapacitor desalter 100 may comprise pair of electrodes, a pair of collector that links to each other with electrode respectively, one or more places the bipolar electrode between the electrode and place a plurality of dividing plates between every pair of adjacent electrode, handle inlet flow 13 under the charged state, under the discharge condition, handle second strand of liquid stream 17.Each bipolar electrode respectively has a positive pole and a negative pole, and is spaced apart by the ion non-permeable formation.
In certain embodiments, collector can be lath, net, paper tinsel or thin plate, and is made by metal or alloy.Metal can comprise such as titanium, platinum, iridium or rhodium.Alloy can comprise such as stainless steel.In other embodiment, collector can be made up of graphite or plastic material, for example can contain poly polyolefin.In some applications, the plastics collector can be mixed with conductive black or metallic, to obtain electric conductivity to a certain degree.
Electrode and/or bipolar electrode can comprise conductive material, and this material can have thermal conductivity, also can not have thermal conductivity, but and can contain the big particle of the little surface area of volume.In certain embodiments, conductive material can contain one or more material with carbon elements.The non-limiting example of this kind material with carbon element contains the combination of activated carbon granule, porous charcoal particle, carbon fibre, charcoal-aero gel, porous MCMB or above-mentioned substance.In other embodiments, conductive material can comprise the composite of conduction, for example the carbide of manganese, iron or both oxides or titanium, zirconium, vanadium, tungsten or its combination.
In addition, dividing plate can be made up of the electrically insulating material of permeable ion, comprises membrane material, porous material and pore-free material, and every pair of electrode separation is come.In non-limiting example, dividing plate can contain or itself constitutes certain space, forms the flow passage that flows through electrode for the liquid of handling.
In certain embodiments, electrode, collector and/or bipolar electrode can be the lath-shaped that is parallel to each other, thereby form the structure of stack.In other embodiment, electrode, collector and/or bipolar electrode can take on a different shape, and be for example laminar, block or cylindric.Further, electrode, collector and/or bipolar electrode can form various structures.For example, electrode, collector and/or bipolar electrode may be placed to concentric spirality, are continuous dividing plate therebetween.
As shown in Figure 3, in some design, settler 12 can use with pole-reversing electroosmosis device 11." pole-reversing electroosmosis " vocabulary shows the electrochemistry separation process of using amberplex to remove deionization or charged species from water or other liquid.
In some non-limiting examples, the pole-reversing electroosmosis device comprises a pair of respectively as the electrode of anode and negative electrode.Anion that several replace and cation-exchange membrane are placed between anode and the negative electrode, form a plurality of light chambers that replace mutually and dense chamber passage between them.Anion-exchange membrane can make anion pass through, and cation-exchange membrane can make cation pass through.In addition, the pole-reversing electroosmosis device may comprise also that several place the dividing plate between every pair of film and electrode and the adjacent film.
Therefore, when 11 energisings of pole-reversing electroosmosis device, for example liquid flows the liquid of 13 and 17 (as shown in Figure 3) and so on and flows through light chamber and the dense chamber passage that replaces mutually respectively.In the passage of light chamber, first strand of liquid 13 is ionized, and the cation in first strand of liquid 13 shifts to negative electrode by cation-exchange membrane, enters adjacent passage.Anion shifts by the anion-exchange membrane anode, enters adjacent passage.At the adjacent passage that is positioned at passage both sides, light chamber (dense chamber passage), even electric field applies strength (for example, anion is pushed to anode) by electrode to ion respectively, still, cation can not shift by anion-exchange membrane, and anion can not shift by cation-exchange membrane.Therefore, anion and cation are stayed in the passage of dense chamber, and concentration increases.Therefore, take the anion and the cation of high concentration out of pole-reversing electroosmosis device 11, make that output stream 16 is higher than the salt content of inlet flow 17 by second strand of liquid 17 of dense chamber passage.
In certain embodiments, the polarity of pole-reversing electroosmosis device 11 electrodes may be put upside down to reduce anion and cationic fouling tendency in the passage of dense chamber with for example 15 to 50 minutes the time interval.Therefore, under opposite polarization state, the light chamber passage under the normal polarity will become the dense chamber passage of second strand of liquid 17, and the dense chamber passage under the normal polarity will become the light chamber passage of inlet flow 13.
Therefore, when the pole-reversing electroosmosis device is in the normal polarity state, as solid line 33 and 34 signs, the liquid stream 17 that comes from the liquid stream 13 in liquid source (not marking) and come from container 20 respectively along separately first input pipe by the first road valve 31 and 32, enter pole-reversing electroosmosis device 11.Shown in solid line 37 and 38, diluent stream 14 and output stream 16 enter separately first efferent duct by the second road valve 35 and 36.
When the pole-reversing electroosmosis device is in the polarity reversal state, shown in dotted line 39 and 40, liquid stream 13 and 17 will enter pole-reversing electroosmosis device 11 along second input pipe separately.Shown in dotted line 41 and 42, diluent stream 14 and output stream 16 second efferent ducts that will enter separately.Therefore, inlet flow and output stream will alternately enter separately pipeline to reduce fouling tendency.
Salt or other contamination precipitations can take place in liquid in settler 12 after pole-reversing electroosmosis device 11 and 12 of settlers circulate.When the discharge capacity of precipitation capacity in the settler 12 and discharge stream 27 equals the removal amount of liquid stream 13 charged species in the pole-reversing electroosmosis device, the degree of saturation of the liquid that circulates in pole-reversing electroosmosis device and settler or degree of super saturation will be stablized, and form dynamic equilibrium.
In the application of some pole-reversing electroosmosis, electrode will comprise conductive material, and this material may have thermal conductance, also may not have thermal conductance, but and may contain the big particle of the little surface area of volume.Dividing plate comprises can be for iontophoretic injection but non electrically conductive material comprises membrane material, porous material and pore-free material.In non-limiting example, cation-exchange membrane will comprise the quaternary amine base, and anion-exchange membrane will comprise sulfonic group or carboxylic acid group.
In certain embodiments, when saturated or degree of super saturation is very high, the rapid precipitation of salt or other impurity can take place.For example, calcium sulfate just can precipitate rapidly in 5 minutes after at room temperature reaching hypersaturated state more than 400%, and this is very unfavorable to settling system.Therefore, in certain embodiments, will in container 20, add seed particles (not shown), thereby can when this salt or other ionic impurities are in lower hypersaturated state, cause precipitation rapidly on its surface.Agitating device 23 and/or pump 25 can promote the suspension of seed particles to distribute.
In non-limiting example, the average diameter of seed particles is between 1 to 500 micron, between 0.1 to 30 percentage by weight (wt%) of concentration liquid weight in precipitation zone.In certain embodiments, the average diameter of seed particles is between 5 to 100 microns, and the 1.0wt% of concentration liquid weight in precipitation zone is between the 20wt%.In some applications, seed particles is made up of solid particle, includes but not limited to calcium sulfate particle and hydrate thereof, to cause precipitation.The average diameter of calcium sulfate particle is between 10 to 200 microns.In certain embodiments, the 0.1wt% of the concentration of calcium sulfate seed grain liquid weight in precipitation zone is between the 2.0wt%, thereby makes the calcium sulfate concentration that leaves settler under this solution be controlled at 100% to 150% saturation degree.
Should be noted that seed particles is not limited to certain specific material, and will select according to the concrete applied environment of settler.
In certain embodiments, overflow 29 is by the overfall discharge that is higher than liquid outlet of portion from container, to keep waiting the saturated or degree of super saturation of holding some material in circulation and/or the reduction container 20.Overflow 29 can mix with the bottom stream 30 of discharging from container 20 bottoms with pump 25, forms discharge stream 27.
In certain embodiments, bottom stream 30 contains 10% or the deposit of higher percentage by weight.When discharge stream 27 operations, valve 26 cuts out the path that circular flow returns container 20.In addition, valve 204 is set, can be used to emptying receptacles 20 in the bottom of container 20.
Should be noted that settler 12 is not limited to use with specific ultracapacitor desalter or specific pole-reversing electroosmosis device.
In addition, as shown in Figure 4, vaporising device 43 and crystallizer 44 can be used to make discharge stream 27 evaporation or the crystallizations that come from settler 12, thereby improve the recycling of water or the zero-emission of realization liquid.Desalter 101 shown in Figure 4 can be the combination of any ultracapacitor desalter, pole-reversing electroosmosis device, other desalters or said apparatus.For convenience of description, some parts do not draw.Those skilled in the art know how to use vaporising device 43 and crystallizer 44, therefore do not repeat them here.In a non-limiting example, crystallizer 44 can be thermal crystalline device, for example dryer.In some applications, will can not use vaporising device 43 and/or crystallizer 44.
The settler 94 that is according to another embodiment of the invention to be provided shown in Figure 5.This settler 94 is similar to settler 12, but settler 94 contains the partition member 940 of a taper (convergent downwards), and its semi-cone angle β is between 0 to 20 degree, so that solid matter (particulate) is obtained better sedimentation effect.
Shown in Figure 6 is the settler 34 that provides according to another embodiment of the invention.Settler 34 contains a skirt body 340 that is positioned at 342 outsides, settler 34 tops, and this skirt body 340 is used to hold the liquid that overflows from settler 34 tops 342.The upper limb 344 on top 342 is lower than the upper limb 346 of skirt body 340, can be used as the overflow mechanism that is used for settler 34 Separation of Solid and Liquid zone liquid.Upper limb 344 undulates perhaps are made of a series of v type groove (not shown).
Shown in Figure 7 is the settler 44 that provides according to another embodiment of the invention.Settler 44 is similar to other devices described herein, but in its Separation of Solid and Liquid zone 444 flexible pipe 440 that has a plurality of holes 442 is arranged, and forms a plurality of outlets of second strand of liquid, thereby increases the uniformity of salt content in the Separation of Solid and Liquid zone 444.
On the other hand, the present invention relates to a kind of method, comprise: a kind of settler is provided, this device comprises: the precipitation parts that place container, be formed at the precipitation zone of precipitation parts and Separation of Solid and Liquid zone between precipitation parts and the container and the liquid outlet that is positioned at container top, wherein, the diameter ratio of container and precipitation parts is between 1.5 to 2.8; First burst of salting liquid input precipitation zone also therefrom separated out solid; Solid is precipitated by the gravity effect in the Separation of Solid and Liquid zone; The second strand of liquid that salt content is lower than first strand of liquid discharges from liquid outlet.
The settler that has agitating device 540 54 that is according to an embodiment of the present to be provided shown in Figure 8.Agitating device 540 comprises hollow tubular axis 542 and impeller 544.One flow 545 flows through tubular axis 542 and enters precipitation zone 546 from impeller 544 belows.Impeller stirs and makes the blade of impeller 544 form vacuum 541 times, impels the first strand of liquid 545 in the partition member 548 upwards to flow.
According to shown in Figure 9, according to another kind of embodiment of the present invention, settler 64 is provided with agitating device 640, and this agitating device 640 comprises that 642, the first strands of liquid 644 of impeller enter precipitation zone 646 from impeller 642 tops.
According to shown in Figure 10, according to another kind of embodiment of the present invention, settler 74 has agitating device 740, and this agitating device 740 comprises impeller 742,742 tops enter precipitation zone 746 to multiply liquid 744 along different directions from impeller, to improve the uniformity of salt content in the precipitation zone 746.
According to shown in Figure 11, according to another kind of embodiment of the present invention, settler 84 has agitating device 840, and this agitating device 840 comprises impeller 842, feed stream 844 enter partition member 848 from the below of impeller 842 and precipitation zone 846 diffusion separate out solid (not shown).
In certain embodiments, contain concentration in first strand of liquid of input settler and be about 120% to 140% saturated calcium sulfate.From second strand of liquid of settler liquid outlet output, contain concentration and be about 100% to 120% saturated calcium sulfate.
The design feature of various embodiment described herein can be replaced according to concrete application, exchange or mutually combine.
Experimental example
The following those skilled in the art of being exemplified as implement the invention provides further guidance.Therefore, example does not limit the scope of the present invention that defines in claims.
Shown in Figure 12 is the cutaway view of employed settler 120 in example.The container 121 of settler 120 is made by polymethyl methacrylate, and its height H 1 is 635 millimeters, and wherein, top 122 is 500 millimeters, and bottom 123 is 135 millimeters.Top 122 is cylinder, and its diameter D3 is 250 millimeters.It is conical that bottom 123 is, and its cone angle is 90 degree.Precipitation parts 124 are cylinder, and its diameter D4 is 150 millimeters, highly is 500 millimeters.Partition member 125 is cylinder, and its diameter is 100 millimeters, highly is 402 millimeters.Three leaf agitating devices 135 (German IKARW 20 digital overhead type mechanical agitators, schematic diagram is seen shown in Figure 13) are placed in the partition member 125, comprise that tubular axis and diameter are 80 millimeters impeller.The mixing speed of impeller is 300 commentaries on classics per minutes.
The top of container 121 and precipitation parts 124 flushes.Diameter be 350 millimeters lid 126 cover container and the precipitation parts the top enter to prevent dust.Two sample port 127 and an output liquid flowing outlet 128 are arranged.Container 121 supports precipitation parts 124 by connected structure 129, and the precipitation parts support partition member 125 by connecting structure 130.In partition member 125, support the tubular axis of agitating device with bearing 131.Settler 120 is placed on the pedestal 132, and bottom 123 is lower than this pedestal.Bottom 123 comprise two from 133, one of upwardly extending discharge outlet of lower bottom end for looping back head piece, when another stops up for first discharge outlet standby mouthful also comprises the valve 134 that extends from lower bottom end downwards, is used for emptying.
What Figure 13 represented is the operation schematic diagram of settler 120 among Figure 12.Experimentation is a process of running continuously, before the experiment beginning, to the settler 20 liter raw waters of its composition shown in table 1 " initial charging " row of having packed into, with calcium sulphate dihydrate (200 grams as seed particles, particle diameter is 50 to 200 microns, comes from journey insulation material Co., Ltd of Shanghai section).
Inlet flow (the liquid stream 1 among Figure 13), the output that just comes from ultracapacitor desalter (not shown) under the discharge condition is flowed, and is imported into settler 120.Each cycle of operation of ultracapacitor desalter comprises 30 minutes discharge condition and 15 minutes charged state.The composition of liquid stream 1 is as shown in table 1 below.The concentration of calcium sulfate is about 123.20% saturation degree in the liquid stream 1.Liquid after the processing (liquid stream 2) is got back in the ultracapacitor desalter.The composition of liquid stream 2 is as shown in table 1, and it is about 113.80% saturated that the concentration of calcium sulfate has only.
The water velocity of inlet flow 1 and output stream 2 input and output containers 122 is controlled in 500 ml/min respectively, is equivalent to the linear velocity of 8.6 cels.The discharge of per unit cross-sectional area is about every square metre of 0.25 gallon of every square feet of per minute or 1.7 * 10-4 cubic meters per second in the Separation of Solid and Liquid zone.Because solids meeting sustainable growth, in each charging stage of 30 minutes, flow velocity is that the circulating reflux (liquid stream 3) of 6000 ml/min will be moved 4 minutes, to keep the stability of solids volume and distribution.Overflow stream (liquid stream 4) and be used to keep the water yield stable in the settler.In order to keep the stable of solid seed particles, the discharge phase in 2 seconds was arranged in each charging stage of 30 minutes.In discharge phase, 75 milliliters of underflows of container bottom are discharged in discharge stream 5.After filtration, obtain about 6～7 gram solid particles.In discharge phase, overflow stream 4 and add in the discharge stream 5.
Table 1
| Initial charging | |
|
|
| Na +(ppm?wt/wt) | 297 | 5033.9 | 5007 |
| K +(ppm?wt/wt) | 41.5 | 1286.8 | 1265 |
| Ca 2+(ppm?wt/wt) | 210.2 | 1144.1 | 1072 |
| Mg 2+(ppm?wt/wt) | 59.9 | 550.7 | 549 |
| Cl -(ppm?wt/wt) | 530 | 8952.4 | 8845 |
| HCO 3 -(ppm?wt/wt) | 162 | 299.2 | 242 |
| SO 4 2-(ppm?wt/wt) | 595 | 4824.9 | 4578 |
| The calcium sulfate saturation degree | 24.8％ | 123.20％ | 113.80％ |
The particle concentration that records in the output stream 2 by filtration remains on about 11ppm.The water quality of the microscopical optical microscope image demonstration of Japan NikonECLIPSE Ti output stream 2 can be compared with deionized water.Measure the turbidity of exporting stream 2 with the U.S.'s HACH 2100AN transmissometer every day, and table 2 is depicted as the turbidity data of gained.
Table 2
| |
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| Turbidity (NTU) | 2.06 | 1.75 | 1.72 | 2.13 | 1.98 | 2.34 | 2.12 | 1.88 | 2.27 | 2.02 | 2.11 | 2.04 |
By above data as can be seen, settler has reduced the saturation degree of calcium sulfate at normal temperatures and pressures with simple mechanism, thereby cost is lower, and the running of whole system is very stable.
Although in the specific embodiment, Partial Feature of the present invention is had been described in detail and describes, under the prerequisite that does not break away from spirit of the present invention, can carry out various changes and replacement to the present invention.Same, those skilled in the art also can obtain other change disclosed by the invention and equivalent according to normal experiment.All these change, and replacement and equivalent are all within the design and scope of the defined claim of the present invention.
Claims (20)
1. settler, it is characterized in that, comprise the precipitation parts that place container, be formed at the precipitation zone of precipitation parts and the Separation of Solid and Liquid zone between precipitation parts and the container, and the liquid outlet that is positioned at container top, container diameter and precipitation parts diameter ratio are between 1.5 to 2.8.
2. settler as claimed in claim 1 is characterized in that, container diameter and precipitation parts diameter ratio are between 1.6 to 2.2.
3. settler as claimed in claim 1 is characterized in that container height and diameter ratio are about more than 0.2.
4. settler as claimed in claim 1 is characterized in that, the bottom of container is cone angle and is about 60 and spends to the taper of 120 degree, is provided with for liquid or solidliquid mixture returns the head piece that loops back of precipitation zone.
5. settler as claimed in claim 1 is characterized in that, also comprises the agitating device that promotes precipitation.
6. settler as claimed in claim 5 is characterized in that, the impeller diameter of agitating device is about 0.2 to 0.4 times of container diameter, and about 2 to 6 blades are arranged.
7. settler as claimed in claim 1 is characterized in that, also comprises the partition member that is arranged in the precipitation parts, and this partition member communicates from top and bottom with the precipitation parts.
8. settler as claimed in claim 7 is characterized in that, partition member is the taper of semi-cone angle between 0 to 20 degree of downward convergent.
9. settler as claimed in claim 7 is characterized in that, also comprises extending to the impeller that partition member promotes the agitating device of precipitation, and wherein the ratio of the diameter of partition member and impeller diameter is about greater than 1.0 smaller or equal to 2.0.
10. as the described settler of arbitrary claim in the claim 1 to 9, it is characterized in that the top of container is provided with the overfall that is higher than liquid outlet.
11. as the described settler of arbitrary claim in the claim 1 to 9, it is characterized in that, also comprise the skirt body that is positioned at the container upper outside, the liquid that the portion from container of being used to hold overflows, skirt body upper limb is higher than container top undulate or is provided with the upper limb of a series of v type grooves.
12., it is characterized in that container is provided with several liquid outlets as the described settler of arbitrary claim in the claim 1 to 9.
13. a system that contains the described settler of arbitrary claim in the claim 1 to 9 is characterized in that, also comprising to settler provides the liquid stream that supplies precipitation and receives the desalter that flows from the liquid of liquid outlet outflow.
14. system as claimed in claim 13 is characterized in that, desalter comprises ultracapacitor desalter or pole-reversing electroosmosis device.
15. a method is characterized in that, comprising:
A kind of settler is provided, comprises:
Place the precipitation parts of container, be formed at the precipitation zone of precipitation parts and the Separation of Solid and Liquid zone between precipitation parts and the container; And
Be positioned at the liquid outlet on container top; Wherein
Container diameter and precipitation parts diameter ratio are about between 1.5 to 2.8;
Provide one flow to precipitation zone, and therefrom separate out solid;
By the gravity effect solid is precipitated in the Separation of Solid and Liquid zone; And
Give off second strand of liquid stream that salt content is lower than one flow from liquid outlet.
16. method as claimed in claim 15 is characterized in that, also comprises with agitating device stirring to promote precipitation, this agitating device comprises hollow tubular axis, and first burst of liquid communication crossed hollow tubular axis and entered precipitation zone from the agitating device below.
17. method as claimed in claim 15 is characterized in that, also comprises with agitating device stirring to promote precipitation, this agitating device comprises impeller, and one flow enters settler from the top or the below of impeller.
18. method as claimed in claim 15 is characterized in that, also comprising provides multiply liquid stream to enter precipitation zone from different directions.
19., it is characterized in that the liquid of per unit cross-sectional area or solidliquid mixture flow are about 0.82 * 10 in the Separation of Solid and Liquid zone as the described method of arbitrary claim in the claim 15 to 18
-4To 3.3 * 10
-4Between every square metre of the cubic meters per second.
20. method as claimed in claim 19 is characterized in that, also comprising provides seed particles in container.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010105019.4A CN102139169B (en) | 2010-01-29 | 2010-01-29 | Settler, method and the system containing this settler |
| US13/015,466 US20110114567A1 (en) | 2009-07-30 | 2011-01-27 | Precipitation device, method and associated system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010105019.4A CN102139169B (en) | 2010-01-29 | 2010-01-29 | Settler, method and the system containing this settler |
Publications (2)
| Publication Number | Publication Date |
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| CN102139169A true CN102139169A (en) | 2011-08-03 |
| CN102139169B CN102139169B (en) | 2015-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010105019.4A Expired - Fee Related CN102139169B (en) | 2009-07-30 | 2010-01-29 | Settler, method and the system containing this settler |
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| Country | Link |
|---|---|
| CN (1) | CN102139169B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103130363A (en) * | 2011-11-28 | 2013-06-05 | 通用电气公司 | Desalination system and desalination method |
| CN111214855A (en) * | 2019-12-06 | 2020-06-02 | 骆军辉 | Disc thickener |
| CN112390286A (en) * | 2020-11-20 | 2021-02-23 | 中国有色集团（广西）平桂飞碟股份有限公司 | Fine filtration pretreatment process for titanium liquid produced by sulfuric acid method titanium dioxide |
| CN117101635A (en) * | 2023-10-24 | 2023-11-24 | 江苏神鹤科技发展有限公司 | Heating desorption recovery plant of nanometer microballon adsorbent |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA865990B (en) * | 1985-08-19 | 1987-03-25 | Peterson Filters Corp | Method and apparatus for use in separating solids from liquids |
| CN1003213B (en) * | 1987-05-16 | 1989-02-08 | 核工业部北京第五研究所 | High efficiency washing tower with low bed layer for slurry and its application |
| CN2411049Y (en) * | 1999-02-25 | 2000-12-20 | 张行赫 | Cleaning tank for low-dirty pollution water |
| CN2564552Y (en) * | 2002-08-16 | 2003-08-06 | 江西净水实业有限公司 | Waste water treater |
| CN2737785Y (en) * | 2004-11-04 | 2005-11-02 | 湖北绿碧蓝环境科技股份有限公司 | Ring wing type hydraulic circulating sedimentation tank |
| CN101073715A (en) * | 2007-03-29 | 2007-11-21 | 复旦大学 | Apparatus and process for clarifying water efficiently |
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2010
- 2010-01-29 CN CN201010105019.4A patent/CN102139169B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103130363A (en) * | 2011-11-28 | 2013-06-05 | 通用电气公司 | Desalination system and desalination method |
| CN103130363B (en) * | 2011-11-28 | 2015-07-15 | 通用电气公司 | Desalination system and desalination method |
| CN111214855A (en) * | 2019-12-06 | 2020-06-02 | 骆军辉 | Disc thickener |
| CN112390286A (en) * | 2020-11-20 | 2021-02-23 | 中国有色集团（广西）平桂飞碟股份有限公司 | Fine filtration pretreatment process for titanium liquid produced by sulfuric acid method titanium dioxide |
| CN112390286B (en) * | 2020-11-20 | 2023-03-14 | 中国有色集团（广西）平桂飞碟股份有限公司 | Fine filtration pretreatment process for titanium liquid produced by sulfate process titanium dioxide |
| CN117101635A (en) * | 2023-10-24 | 2023-11-24 | 江苏神鹤科技发展有限公司 | Heating desorption recovery plant of nanometer microballon adsorbent |
| CN117101635B (en) * | 2023-10-24 | 2024-02-09 | 江苏神鹤科技发展有限公司 | Heating desorption recovery plant of nanometer microballon adsorbent |
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| Publication number | Publication date |
|---|---|
| CN102139169B (en) | 2015-08-12 |
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