CN102049347B - Method for separating solid particle mixture - Google Patents

Method for separating solid particle mixture Download PDF

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Publication number
CN102049347B
CN102049347B CN 200910236930 CN200910236930A CN102049347B CN 102049347 B CN102049347 B CN 102049347B CN 200910236930 CN200910236930 CN 200910236930 CN 200910236930 A CN200910236930 A CN 200910236930A CN 102049347 B CN102049347 B CN 102049347B
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solid particle
flow
slurries
density
solvent
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CN102049347A (en
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岳国君
郝小明
林海龙
邓立康
罗虎
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GUANGXI COFCO BIO-ENERGY Co Ltd
Cofco Corp
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GUANGXI COFCO BIO-ENERGY Co Ltd
Cofco Corp
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Priority to CN 200910236930 priority Critical patent/CN102049347B/en
Priority to PCT/CN2010/078399 priority patent/WO2011054296A1/en
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Abstract

The invention discloses a method for separating a solid particle mixture. The solid particle mixture comprises first solid particles and second solid particles, wherein the density of the first solid particles is less than the density of the second solid particles. The method comprises the following steps of: making slurry containing the solid particle mixture and a solvent flow; and depositing the second solid particles during the flowing to form a second solid particle layer, wherein the first solid particles continuously flow with the solvent. The method for separating the solid particle mixture is particularly suitable for removing sand particles from food solid particles such as cassava particles and the like.

Description

A kind of method of separating solid particle mixture
Technical field
The present invention relates to a kind of method of separating solid particle mixture, relate more specifically to a kind of method of removing the grains of sand in the solid particle.
Background technology
From the wholefood solid particle of solid particle especially for food service industry, remove the grains of sand, thereby guarantee that the pure of solid particle is very important.In the prior art; for realizing removing sand purpose; mostly use the eddy flow litter cleaning machine to remove sand; particularly; the slurries that solid particle is mixed with the grains of sand are by the effect of centrifugal sedimentation, make that the grains of sand of greater density are thrown toward pool wall in the slurries, and get rid of from the bottom flushing of sediment mouth; the solid particle that density is lighter is then stayed in the water, thereby realizes separating of solid particle and the grains of sand.
In eddy flow removes sand, although can remove most of grains of sand, need to use a plurality of complex component such as eddy current type settling pit, the motor that produces centrifugal force and gearbox, slurries are separated, so that the complex structure of eddy flow litter cleaning machine under the effect of centrifugal force.In addition, for the effect of being removed sand preferably, also to provide larger slurries pressure and centrifugal force.In order to keep certain centrifugal force, the eddy flow litter cleaning machine must be worked under enclosed environment, therefore can not continued operation, and each slurries amount of processing is restricted.
Summary of the invention
Therefore, be the eddy flow that solves prior art complicated, the problem such as can not remove sand continuously of the operating environment that exists of removing sand, the invention provides a kind of method of the simple to operate and separating solid particle mixture that can work continuously.
The invention provides a kind of method of separating solid particle mixture; this solid particle mixture contains the first solid particle and the second solid particle; the density of the first solid particle is less than the density of described the second solid particle; the method comprises: make described solid particle mixture with flow of solvent; and make described the second solid particle in flow process, deposit formation the second solid particle layer; the first solid particle then continues to flow with solvent, and the density of described the second solid particle is greater than the density of described solvent.
The method of separating solid particle mixture of the present invention has utilized described the first solid particle different from the density of described the second solid particle; make the second larger solid particle of density deposition occur and make the first solid particle with flow of solvent; thereby realize separating of the first solid particle and the second solid particle; separation of the present invention can be used for removing sand from the raw material solid particle; and simple to operate, not needing provides high pressure slurries and centrifugal force and can carry out continuous operation with complicated equipment.
Description of drawings
Fig. 1 uses riffler to implement a kind of sectional view of embodiment of the method for separating solid particle mixture of the present invention;
Fig. 2 is the schematic diagram that shows the playpipe of riffler.
The specific embodiment
According to the method for separating solid particle mixture of the present invention, go for various separation the first solid particles and the second solid particle, as long as satisfy following three conditions: the density of (1) first solid particle is less than the density of the second solid particle; The density of (2) second solid particles is greater than the density of solvent; (3) first solid particles and the second solid particle all are insoluble to solvent.For convenience of description, the below is take the first solid particle as the cassava particle, and the second solid particle is the grains of sand, and solvent is that water illustrates method of the present invention.
In the method for separating solid particle mixture of the present invention, solid particle mixture is separated with water flow and in flowing.But this mode is unfavorable for controlling the ratio of solid particle mixture and water, makes the fluid mobility of formation inconsistent.Preferably, solid particle mixture and water are at first mixed form uniform slurries 20 (for example by stirring), slurries 20 are flowed and separating solid particle mixture.Below, solid particle mixture is become in the situation of slurries 20 explanation with the water mixed-shaped, use the method for separating solid particle mixture of the present invention.Wherein, consumption and the mixing time of water is not particularly limited, if can obtain mobile better, slurries 20 that viscosity is moderate.The present inventor finds, be about when the quality of water tapioca starch particle and the grains of sand gross mass 20-100 doubly, when mixing time is 0.5-2h, can obtain mobile better, slurries 20 that viscosity is moderate, therefore, the preferred above-mentioned condition of the present invention.
The method of separating solid particle mixture of the present invention can realize with various suitable equipment.In one embodiment of the invention, as shown in Figure 1, use riffler 10 to implement the method for separating solid particle mixture of the present invention.
Riffler 10 comprises cell body 11, entrance 12 and exports 13, and cell body 11 comprises sidewall 14 and bottom 15, and entrance 12 is respectively formed on the relative sidewall 14 with outlet 13.Slurries 20 (or the mixture of cassava particle and the grains of sand is with fluid of water flow formation) flow in the rifflers 10 from entrance 12, and the cassava particle shows different in cell body 11 interior mobile processes with the grains of sand because density is different.The density of the grains of sand is larger, and settling velocity is fast and at first form grains of sand layer 22 in the bottom of cell body 11 deposition, and the cassava Particles Suspension is in water and with water flow, and the cassava particle of collecting with water flow namely can reach the purpose of separating cassava particle and the grains of sand.For example, make the cassava particle with water flow to outlet 13, the cassava particle that the water above water that exports 13 places carries wherein flows out from exporting 13, thereby realizes separating of cassava particle and the grains of sand.
Owing under the impact of the water that the grains of sand layer 22 that grains of sand deposition forms flows easily above it the movement of streamwise occurs, thereby accumulates on the sidewall at outlet 13 places, if overheap can overflow from exporting 13.Therefore, the method for separating solid particle mixture of the present invention can also comprise and prevents that the grains of sand layer 22 from moving freely along the flow direction of slurries 20.
Preferably, move freely along the flow direction of slurries 20 for preventing grains of sand layer 22, in the method for separating solid particle mixture of the present invention, can make slurries 20 in flow process by perpendicular to the barrier of its flow direction.Preferably, the height of this barrier is higher than the height of grains of sand layer 22, is lower than the liquid level of slurries 20.Particularly, the bottom 15 of cell body 11 can have bossing 16 and/or sunk part 17.Because the grains of sand deposit formation grains of sand layer 22 in the flow process of slurries 20 and grains of sand layer 22 is deposited on the bottom 15 of cell body 11; when grains of sand layer 22 is subject to the impact of water flow of its top and streamwise when moving, the grains of sand can move in the sunk part 17 or be stopped by bossing 16 and can not continue streamwise and move.Even the grains of sand are deposited on the top of bossing 16 at the beginning, this part grains of sand also can move with the current of its top, then is deposited on sunk part 17 bottom.Therefore, grains of sand layer 22 can not move to the sidewall at outlet 13 places basically, thereby prevents that the grains of sand are stacked into outlet 13 and overflow from exporting 13.Preferably, as shown in Figure 1, bottom 15 has a plurality of bossings 16 and/or a plurality of sunk part 17, and is set on the bottom 15 of cell body 11 along 13 arrangements from entrance 12 to outlet.Wherein, greater than the height of grains of sand layer 22, the liquid level of slurries 20 is higher than the height of bossing 16 to the degree of depth of the height of bossing 16 or sunk part 17 (i.e. the fluctuating of the vertical height of bottom 15).Preferably, slurries 20 are interior when mobile at riffler 10, make the top and the poor 0.1-0.5m of remaining of the liquid level of slurries 20 of bossing 16 or sunk part 17, thus effectively prevent grains of sand layer 22 move freely and do not hinder as far as possible flowing of slurries 20.
In said process; if the first solid particle is also with the speed precipitation slower with respect to the second solid particle; when the flow velocity of slurries 20 is slower; a certain amount of the first solid particle can be deposited to the second solid particle layer before flowing to outlet 13; thereby can't be trapped in the riffler 10 from exporting 13 outflows with water, cause a lot of wastes.Similarly, even the density of the first solid particle is enough to make it to swim in fully in the solvent can not sink, but when slurries 20 flow, the first solid particle may be subject to the impact of the second solid particle precipitation and deposit and be mixed in the second solid particle layer with the second solid particle, so also can cause a lot of wastes.
For addressing this problem; can be according to the first dissimilar solid particles; the flow velocity of control slurries 20; so that slurries 20 flow to outlet 13 o'clock from entrance 12; the second solid particle basically is deposited to and forms the second solid particle layer on the bottom 15; and guarantee that the first solid particle is deposited to the top of the horizontal plane at outlet 13 places, namely can flow out from exporting 13.
In addition, the method for separating solid particle mixture of the present invention can also comprise: stir the second solid particle layer, make the first solid particle that is mixed in the second solid particle layer floating and with its top water flow.Preferably, can provide extra gas flow and/or liquid stream to the second solid particle layer.More preferably, can above the top layer of the second solid particle layer, provide down gas flow and/or liquid stream.Wherein, the gas that forms gas flow can be not with the gas of the first solid particle, the second solid particle and solvent reaction, the liquid of liquid stream is preferably solvent.Be the cassava particle at the first solid particle, the second solid particle is the grains of sand, when solvent is water, can use air stream and/or current.
In this process, can use gas flow and/or the liquid stream of suitable flow velocity and flow, so that the cassava particle in the top layer of grains of sand layer 22 floats to the position away from grains of sand layer 22, perhaps make at least the cassava particle that is mixed in the grains of sand layer 22 float to the surface of grains of sand layer 22, thereby taken away by the current of grains of sand layer 22 top.Although this may make some grains of sand in the grains of sand layer 22 also floating, the grains of sand can sink rapidly because density is large, therefore basically can not taken away by water.
For implementing the step of above-mentioned gas jet stream and/or liquid stream, can gas jet stream and/or the injection apparatus of liquid stream interior can the setting of riffler 10.Particularly, described injection apparatus comprises at least one playpipe 18, and each playpipe 18 comprises body and a plurality of hole P that are positioned on the body separately, and gas flow and/or liquid communication are crossed this hole P and sprayed.
Each playpipe 18 can be arranged in the top of grains of sand layer 22 in every way, and for example, playpipe 18 can be set to across two of riffler 10 relative sidewalls.As shown in Figure 1, playpipe 18 can be along the parallel longitudinal setting of riffler 10, perhaps along laterally the be arrangeding in parallel of riffler 10, and also can be along being predetermined angle and be arrangeding in parallel with horizontal and vertical.Certainly, playpipe 18 also can be arranged in a crossed manner.
Preferably, as shown in Figure 2, playpipe 18 is arranged on the top of grains of sand layer 22 and hole P is set to towards oblique below grains of sand layer 22 gas jet stream and/or liquid stream, the flow direction or the horizontal plane that are injection direction (Fig. 2 hollow core direction of arrow) and slurries 20 are angle A, and this angle is preferably 30-60 °.As depicted in figs. 1 and 2, playpipe 18 arranges along horizontal (filled arrows is depicted as flow direction among Fig. 2, and flow direction is vertical) of riffler 10, and hole P is set to favour downward 45 ° of horizontal direction (shown in Fig. 2 hollow core arrow) and sprays.Thereby grains of sand layer 22 in a big way in drive the cassava particle, avoid simultaneously making the grains of sand also floating.
Obviously, but can use various pumps or aspirator to make hole P spray gas flow and/or the liquid stream of adjusting strength.In the method for separating solid particle mixture of the present invention, can regulate the flow velocity of slurries 20, and according to the injection intensity of the corresponding adjusting injection apparatus of this flow velocity, i.e. flow velocity and the flow of gas flow and/or liquid stream.When the flow velocity of slurries 20 is slower, can strengthen the gas flow of injection and/or flow velocity and the flow of liquid stream, can be suspended in top, the described top layer of distance at a distance so that be deposited in the cassava particle on the top layer of grains of sand layer 22, thereby avoid below again being deposited to outlet 13 with water flow at 13 o'clock to outlet.When the flow velocity of slurries 20 is very fast, the gas flow that injected device provides and/or liquid stream blow and the cassava particle that suspends can be with the water rapid flow to outlet 13, during this period of time again precipitation apart from less, therefore can use the less gas flow of flow velocity and flow and/or liquid stream to reach identical effect.
In addition, slurries 20 are during with the flow rate determined, flow velocity and the flow of the gas flow that can reduce to spray along the flow direction of slurries 20 and/or liquid stream.In the sidewall zone far away that is provided with outlet 13 along the flow direction distance of slurries 20, can use the larger gas flow of flow velocity and flow and/or liquid stream, can be suspended in top, the described top layer of distance at a distance so that be deposited in the cassava particle on the top layer of grains of sand layer 22, thereby avoid below again being deposited to outlet 13 with water flow at 13 o'clock to outlet; And in the nearer zone of sidewall that is provided with outlet 13 along the flow direction distance of slurries 20, can use the less gas flow of flow velocity and flow and/or liquid stream, thus make the cassava particle floating and flow out with water in avoid the grains of sand also floating and then flow out with water.
The method of separating solid particle mixture of the present invention is particularly useful for density and differs two kinds of larger solid particles, and for example, the density of the first solid particle is no more than 60% of the second density of solid particles, preferably can be 10%-50%.
In addition, when using separation method of the present invention, preferably the first solid particle, the second solid particle and solvent are fully mixed, more preferably, the weight of solvent be the first solid particle and the second solid particle gross weight 20-100 doubly.
Separate with separation method of the present invention in the embodiment of tapioca starch and the grains of sand, in the described slurries, the weight of water be preferably cassava and the grains of sand gross weight 20-100 doubly.The cell body of described riffler is cuboid, and the vertical height of described riffler is preferably 0.5-0.9m, and the sunk part of described bottom and the height of bossing are 0.1-0.3m, and described bossing and sunk part account for the 40-60% of described bottom area.Described outlet bottom and the distance between the bottom be preferably 0.4-0.85m, so that the top of bossing or sunk part and the poor 0.1-0.5m that remains of the liquid level of slurries, distance between described entrance and the bottom is the top that 0.3-0.5m and described entrance penetrate into described entrance place sidewall, distance between the entrance of described riffler and the outlet place sidewall is preferably 5-7m, thereby makes described slurries by the flow velocity natural flow of the drop between described entrance and the described outlet with 3-10m/s.The air-flow that described injection apparatus sprays or the flow velocity of current are 2-4m/s.Use described riffler to carry out the repeated operation effect of can better being removed sand of removing sand, when using described riffler to separate cassava and the grains of sand, make slurries 20 riffler 10 interior repeat to flow can remove 95% the grains of sand 3-5 time.

Claims (11)

1. the method for a separating solid particle mixture, this solid particle mixture contains the first solid particle and the second solid particle, and the density of the first solid particle is less than the density of described the second solid particle, and the method comprises:
Make described solid particle mixture with flow of solvent; and make described the second solid particle in flow process, deposit formation the second solid particle layer; the first solid particle then continues to flow with solvent, and the density of described the second solid particle is greater than the density of described solvent
Wherein, make described solid particle mixture and solvent form slurry, and this slurry is flowed;
Described method also comprises stirs the second solid particle layer, so that it is floating and with described flow of solvent to be mixed in described the first solid particle in described the second solid particle layer, the method of described stirring is for providing gas flow and/or liquid stream to described the second solid particle layer, the direction of described gas flow and/or liquid stream and the flow direction of slurries are 30-60 degree angle down.
2. method according to claim 1, wherein, the method also comprises and prevents that described the second solid particle layer streamwise from moving freely.
3. method according to claim 2, wherein, the described method that prevents that described the second solid particle layer streamwise from moving freely comprise make described slurries in flow process by perpendicular to the barrier of flow direction, the height of this barrier is higher than the height of described the second solid particle layer and is lower than the liquid level of described slurries.
4. method according to claim 3, wherein, described barrier is projection and/or depression.
5. method according to claim 3, wherein, the difference of the height of described barrier and the liquid level of described slurries is 0.1m-0.5m.
6. method according to claim 1, wherein, flow velocity and the flow of gas flow and/or liquid stream are enough to make described the first solid particle that is mixed in described the second solid particle layer to float to the surface of the second solid particle layer.
7. method according to claim 1, wherein, the method also comprises the flowing velocity according to described slurries, regulate flow velocity and the flow of described gas flow and/or liquid stream, the flowing velocity of described slurries increases or when reducing, reduces or increase flow velocity and the flow of described gas flow and/or liquid stream.
8. the described method of any one according to claim 1-7, wherein, the gas of described gas flow not with described slurry reaction, the liquid of liquid stream is the solvent in the slurries.
9. method according to claim 1, wherein, the density of described the first solid particle be at most described the second solid particle density 60%, the density of described solvent is greater than the density of the first solid particle and less than the density of described the second solid particle.
10. method according to claim 1, wherein, the consumption of described solvent be described the first solid particle and described the second solid particle gross weight 20-100 doubly.
11. according to claim 9 or 10 described methods, wherein, described the first solid particle is that size is the following tapioca starch of 2mm, and described the second solid particle is the grains of sand, and described solvent is water, and the liquid level of described slurries is 0.4-0.85m, and flow velocity is 3-10m/s.
CN 200910236930 2009-11-04 2009-11-04 Method for separating solid particle mixture Active CN102049347B (en)

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CN 200910236930 CN102049347B (en) 2009-11-04 2009-11-04 Method for separating solid particle mixture
PCT/CN2010/078399 WO2011054296A1 (en) 2009-11-04 2010-11-04 Sand sedimentation tank, sand separator, and method for separating mixture of solid particles

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CN102392054B (en) * 2011-11-02 2015-11-25 中石油东北炼化工程有限公司吉林设计院 A kind of cassava prepares the desanding method of ethanol production process
CN102989574A (en) * 2011-12-21 2013-03-27 何德裕 Horizontal flow type circulating water solid construction waste separator
CN107755341A (en) * 2016-08-17 2018-03-06 诸暨市银生珍珠养殖有限公司 A kind of pearl cleans sorting unit
CN108014912A (en) * 2016-10-28 2018-05-11 萨摩亚商全球生物科技解决方案股份有限公司 The method and system of separate substance
US20190374956A1 (en) * 2017-01-09 2019-12-12 Sabic Global Technologies B.V. Particle separator and particle separation method

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Publication number Priority date Publication date Assignee Title
DE2133802A1 (en) * 1971-07-07 1973-01-18 Kloeckner Humboldt Deutz Ag Separating granulates by density - using liquid flowing upward through perforated vibrating trough
CN2035272U (en) * 1988-07-05 1989-04-05 何忠成 Ebullition type strake
CN2082198U (en) * 1990-08-27 1991-08-07 中国农业机械化科学研究院 Trough plate bed type rice washing machine
CN2778389Y (en) * 2005-03-02 2006-05-10 统一环保科技股份有限公司 Machinery-free type separation device
CN2902461Y (en) * 2006-05-17 2007-05-23 王旭光 Particle size classification trough

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2133802A1 (en) * 1971-07-07 1973-01-18 Kloeckner Humboldt Deutz Ag Separating granulates by density - using liquid flowing upward through perforated vibrating trough
CN2035272U (en) * 1988-07-05 1989-04-05 何忠成 Ebullition type strake
CN2082198U (en) * 1990-08-27 1991-08-07 中国农业机械化科学研究院 Trough plate bed type rice washing machine
CN2778389Y (en) * 2005-03-02 2006-05-10 统一环保科技股份有限公司 Machinery-free type separation device
CN2902461Y (en) * 2006-05-17 2007-05-23 王旭光 Particle size classification trough

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