CN104475230B - Solid-liquid grading device - Google Patents
Solid-liquid grading device Download PDFInfo
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- CN104475230B CN104475230B CN201410646044.1A CN201410646044A CN104475230B CN 104475230 B CN104475230 B CN 104475230B CN 201410646044 A CN201410646044 A CN 201410646044A CN 104475230 B CN104475230 B CN 104475230B
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Abstract
The invention discloses a solid-liquid grading device. The solid-liquid grading device comprises a hopper type material barrel, an overflow unit, a material supply unit, a material discharge unit, an ascending overflow rate control unit and a sediment discharge concentration control unit, the overflow unit is arranged at the periphery of a top opening of the hopper type material barrel, the material supply unit is arranged at a top inlet of the hopper type material barrel, the material discharge unit is arranged at a bottom outlet of the hopper type material barrel, the ascending overflow rate control unit stabilizes the overflow rate of the hopper type material barrel in a standard range, and the sediment discharge concentration control unit stabilizes the sediment concentration discharged from the hopper type material barrel in a standard range. The solid-liquid grading device intelligently controls the feed amount and discharge amount through using a flow rate detector to monitor the overflow rate and a concentration meter to detect the discharge concentration, realizes to grade solid particles according to a constant settling speed, realizes the precise granularity and concentration control for solid-liquid two-phase flow size grading products through full-automatic operation and control, and obtains the fine products and coarse products with high grading quality.
Description
Technical field
The present invention relates to stock grading technical field, more particularly relate to a kind of solid-liquid grading plant, especially can be widely applied to the grading plant of the solid-liquid two-phase flow serosity of the industries such as environmental protection, mine, metallurgy, building materials, chemical industry.
Background technology
In industries such as environmental protection, mine, metallurgy, building materials, chemical industry, the progressive operation of solid-liquid two-phase flow serosity to be carried out, in especially ore pulp classification, desliming operation, generally it is required for according to the difference such as granularity and proportion, the solids in ore pulp serosity are classified as fine fraction product and coarse fraction product.Graded desliming equipment for solid-liquid two-phase flow serosity mainly has cyclone, spiral classifier, dense bucket, incline board concentrating box etc. the most both at home and abroad, these equipment in use have following main feature: 1. cyclone is mainly used in the closed circuit classification of ore grinding and desliming, advantage is that disposal ability is big, product design is high, and grinding system water consumption is few；Shortcoming is that power consumption is relatively big, and operation easier is higher, product granularity and the bad control of concentration, classification efficiency about 55%；2. spiral classifier is for forming closed circuit classification with ore mill, and advantage is working stability, has from enhanced feature；Shortcoming is before classification and sand return needs the latting drown pulp density that adds water, and water consumption is many, and product pulp density is dilute, and disposal ability is little, and classification matter efficiency is about 35%.The denseest bucket is mainly used in the pre-classification of gravity separation technology desliming and open-circuit grinding, equipment non-power consumption, simple in construction, but shortcoming is desilting concentration is difficult to control to, and discharge is obstructed, and desliming efficiency is low；4. incline board concentrating box is mainly used in desliming dehydration, and unit capacity is relatively big, but have be difficult to control to the desilting concentration that dense bucket is the same, discharge is obstructed, the inefficient shortcoming of desliming.The defect that the graded desliming equipment of solid-liquid two-phase flow serosity the most of the prior art generally exists is that classification efficiency is low, product granularity and the bad control of concentration, it is impossible to obtain fine fraction product and the coarse fraction product of requirement.
Summary of the invention
nullThe present invention is based on above-mentioned prior art problem，The solid-liquid grading plant proposing a kind of brand new of innovation，Particularly with two phase flow serosity, there is good grading effect，Solid-liquid grading plant of the present invention is by installing flow detector on the overflow launder of bucket type barrel、The desilting discharge line of bucket type barrel is installed densitometer，Utilize the principle that in solid-liquid two-phase flow serosity, solids granularity is different with the difference of proportion sedimentation velocity in water，Monitored excess flow by flow detector in real time and densitometer detects discharge concentration in real time and comes Based Intelligent Control inlet amount and withdrawal rate，Reach dynamic equilibrium，Realize by the classification waiting reduction of speed degree to carry out solids，The accurate control of solid-liquid two-phase flow serosity graded product granularity and concentration is achieved with full-automatic manipulation，The higher fine fraction product of classification quality and coarse fraction product are obtained，Innovate environmental protection、Mine、Metallurgical、Building materials、Solid-liquid two-phase flow serosity grading plant in the industries such as chemical industry.
It is as follows that the present invention solves the technical scheme that above-mentioned technical problem taked:
A kind of solid-liquid grading plant, including: bucket type barrel, overflow unit, material feeding unit, material deliverying unit, rise excess flow control unit and desilting discharge concentration control unit, described overflow unit is arranged at the open top periphery of bucket type barrel, for providing fine fraction overflow output of products, described material feeding unit is connected to the top entry of bucket type barrel, for the solid-liquid two-phase flow serosity to be fractionated to the offer of bucket type barrel, described material deliverying unit is arranged at the outlet at bottom of bucket type barrel, for providing coarse fraction desilting output of products, described rising excess flow control unit is by constant in critical field for the excess flow of bucket type barrel, the desilting constant concentration that bucket type barrel is discharged by described desilting discharge concentration control unit is in critical field.
Further according to solid-liquid grading plant of the present invention, wherein said overflow unit includes the overflow launder 3 being arranged at bucket type barrel open top periphery, and the bottom of described overflow launder connects overflow drainage line；Described material feeding unit includes that pump pond 10, pump 9 and pump tubing length, described pump 9 are arranged in pump pond 10, and is pumped in bucket type barrel by pump tubing length by the solid-liquid two-phase flow serosity in pump pond 10；Described material deliverying unit includes speed change discharge apparatus, and the material inlet of described speed change discharge apparatus is connected to the outlet at bottom of bucket type barrel, and the material outlet of described speed change discharge apparatus connects desilting discharge line.
Further according to solid-liquid grading plant of the present invention, on described overflow launder, wherein it is provided with flow detector 5, described desilting discharge line is provided with densitometer 8, it is provided with flow divider 4 in described overflow drainage line, described flow divider 4 includes two discharging ports, first discharging port is connected to described pump pond 10 by overflowing back pipe material, second discharging port connects overflow drain road, fine fraction desilting output of products is provided by described overflow drain road, also include control unit 6, described control unit 6 is connected to described flow detector 5, densitometer 8, speed change discharge apparatus 7 and flow divider 4, and described control unit prestores excess flow scope and the desilting concentration range of standard.
Further according to solid-liquid grading plant of the present invention, wherein said rising excess flow control unit includes described flow detector 5, flow divider 4 and control unit 6, when flow detector 5 detects during the excess flow entering overflow launder is less than control unit the standard excess flow scope prestored, described control unit controls described flow divider 4 and increases the overflow shunt volume to described pump pond, when described flow detector 5 detects during the excess flow entering overflow launder is higher than control unit the standard excess flow scope prestored, described control unit controls described flow divider 4 and reduces the overflow shunt volume to described pump pond；Described desilting discharge concentration control unit includes described densitometer 8, speed change discharge apparatus 7 and control unit 6, when described densitometer detects and is less than in control unit, through the desilting concentration that desilting discharge line is discharged, the standard desilting concentration range prestored, described control unit controls described speed change discharge apparatus and reduces desilting output, when described densitometer detects and is higher than in control unit, through the desilting concentration that desilting discharge line is discharged, the standard desilting concentration range prestored, described control unit controls described speed change discharge apparatus and increases desilting output.
Further according to solid-liquid grading plant of the present invention, wherein said control unit is connected to described pump, when described flow detector 5 detects during the excess flow entering overflow launder is less than control unit the standard excess flow scope prestored, described control unit controls described pump and increases pump speed, when described flow detector 5 detects during the excess flow entering overflow launder is higher than control unit the standard excess flow scope prestored, described control unit controls described pump and reduces pump speed.
Further according to solid-liquid grading plant of the present invention, wherein said bucket type barrel is the barrel of funnel structure of Upper cylindrical cylinder, lower cone cylinder, and the bottom end opening of cylindrical drum is integrally connected to the open top of taper cone barrel, center of inside in described cylindrical drum is provided with material filling cylinder 2, the outlet of described pump tubing length is connected to the open top of material filling cylinder 2, the cone bottom outlet of described taper cone barrel is connected to the material inlet of described speed change discharge apparatus, and described overflow launder 3 is formed as annular groove-shaped structure around the open top periphery of described cylindrical drum.
Further according to solid-liquid grading plant of the present invention, the most also including clear water supplementary units, clear water supplementary units is connected to the taper cone barrel sidewall of described bucket type barrel 1.
Further according to solid-liquid grading plant of the present invention, wherein said control unit includes that input/output module, memorizer, comparator and MCU, described input/output module, memorizer and comparator are connected to described MCU.
Further according to solid-liquid grading plant of the present invention, wherein said flow divider 4 is Electrocontrolled tee valve, described flow detector is supersonic liquid level effusion meter, microwave meter or electromagnetic wave effusion meter, described speed change discharge apparatus 7 includes screw pump and frequency-variable electronic device speed regulator, described densitometer is the densitometer being made up of gamma ray density meter, and described control unit is to use the electronic automatic controller of SIEMENS PLC Programmable Logic Controller composition.
The present invention further provides the stage division of a kind of solid-liquid two-phase flow serosity, comprises the following steps:
Step one, providing solid-liquid two-phase flow serosity in a bucket type barrel, wherein fine particle stage material rises and from the outside overflow of open top of bucket type barrel, and coarse fraction material sinking the outlet at bottom from bucket type barrel discharge desilting；
Step 2, in real time detection excess flow and desilting concentration, and control excess flow and desilting constant concentration in critical field, drop velocity stages go out fine fraction product and coarse fraction product to wait.
Further according to stage division of the present invention, wherein in step 2, when the excess flow detected is less than critical field, increase the solid-liquid two-phase flow serosity inlet amount to described bucket type barrel, when the excess flow detected is higher than critical field, reduce the solid-liquid two-phase flow serosity inlet amount to described bucket type barrel；When the desilting concentration detected is less than critical field, reduce the desilting output of bucket type barrel outlet at bottom, when the desilting concentration detected is higher than critical field, increase the desilting output of bucket type barrel outlet at bottom.
Further according to stage division of the present invention, the open top periphery of wherein said bucket type barrel is provided with overflow launder, described fine particle stage material enters described overflow launder from the outside overflow of open top of bucket type barrel, be provided with flow detector on described overflow launder, described flow detector by detection the unit interval in overflow enter the Fluid Volume in described overflow launder or in the unit interval fluid volume in described overflow launder change detect excess flow；The outlet at bottom of described bucket type barrel is provided with speed change discharge apparatus and densitometer, detects described desilting concentration in real time by described densitometer, is controlled the desilting output of bucket type barrel outlet at bottom by described speed change discharge apparatus.
Further according to stage division of the present invention, the most also include control unit, described control unit is connected to described flow detector, speed change discharge apparatus and densitometer, described control unit prestores excess flow scope and the desilting concentration range of standard, the excess flow signal that described control unit detects based on described flow detector controls the solid-liquid two-phase flow serosity inlet amount to described bucket type barrel, and described control unit controls the desilting output of described speed change discharge apparatus based on the desilting concentration signal that described densitometer detects.
Further according to stage division of the present invention, it is provided with flow divider on the overflow marker pipe of wherein said isopipe root, one of them discharging port of described flow divider is connected to store the pump pond of solid-liquid two-phase flow serosity by pipeline, solid-liquid two-phase flow serosity in described pump pond is pumped in bucket type barrel by pump, and described control unit is connected to described flow divider and controls its overflow shunt volume to pump pond.
Further according to stage division of the present invention, wherein when the standard excess flow scope prestored during the excess flow that described flow detector detects is less than control unit, described control unit controls described flow divider and increases the overflow shunt volume to described pump pond, utilize the increase of pump inlet pressure to improve the solid-liquid two-phase flow serosity pump output to bucket type barrel, when the standard excess flow scope prestored during the excess flow that described flow detector detects is higher than control unit, described control unit controls described flow divider and reduces the overflow shunt volume to described pump pond, utilize the reduction of pump inlet pressure to reduce the solid-liquid two-phase flow serosity pump output to bucket type barrel；When the standard desilting concentration range prestored during the desilting concentration that described densitometer detects is less than control unit, described control unit controls described speed change discharge apparatus and reduces desilting output, when the standard desilting concentration range prestored during the desilting concentration that described densitometer detects is higher than control unit, described control unit controls described speed change discharge apparatus and increases desilting output.
Further according to stage division of the present invention, wherein said control unit is connected to described pump, when the standard excess flow scope prestored during the excess flow that described flow detector detects is less than control unit, described control unit controls described pump and increases the material pumping amount to bucket type barrel, when the standard excess flow scope prestored during the excess flow that described flow detector detects is higher than control unit, described control unit controls described pump and reduces the material pumping amount to bucket type barrel.
Further according to stage division of the present invention, the central authorities of wherein said bucket type barrel are provided with material filling cylinder, and the material pumping outlet of described pump is connected to described material filling cylinder.
Further according to stage division of the present invention, wherein said flow divider includes two discharging ports, one of them discharging port connects described pump pond, and another discharging port connects overflow drain road, provides fine fraction output of products by described overflow drain road；The outlet at bottom of described bucket type barrel is connected to the material inlet of described speed change discharge apparatus, the material outlet of described speed change discharge apparatus is connected to desilting discharge line, described densitometer is installed on described desilting discharge line, and provides coarse fraction output of products by described desilting discharge line.
Further according to stage division of the present invention, wherein said bucket type barrel is the hopper barrel structure of Upper cylindrical cylinder, lower cone cylinder, connecting further on lower cone cylinder has clear water supplementary units, described method also to include the step of artificial supplementation clear water in described bucket type barrel.
Techniques below effect at least can be reached by technical scheme:
1), the present invention introduces intelligent control technology first in solid-liquid two-phase flow serosity classification technique, monitoring in real time based on overflow flow velocity and discharge concentration balances the cyclic process of serosity, achieve by the classification waiting reduction of speed degree to carry out solids, substantially increase classification quality, obtain the higher fine fraction product of classification quality and coarse fraction product, well meet use demand；
2), the present invention automatically controls flow divider by control unit and/or pump speed achieves the Automatic Control of solid-liquid two-phase flow serosity class settling process, substantially increase classification efficiency, wide popularization and application, wide market can be obtained in multiple industry fields such as environmental protection, mine, metallurgy, building materials, chemical industry.
Accompanying drawing explanation
Accompanying drawing 1 is the overall structure schematic diagram of solid-liquid grading plant of the present invention.
In figure, the implication of each reference is as follows:
1-bucket type barrel, 2-material filling cylinder, 3-overflow launder, 4-flow divider, 5-flow detector, 6-control unit, 7-speed change discharge apparatus, 8-densitometer, 9-pump, 10-pump pond, 11-clear water supplementary units.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is described in detail, so that those skilled in the art can be more clearly understood from the present invention, but the most therefore limits the scope of the invention.
The overall structure of solid-liquid grading plant of the present invention as shown in Figure 1, including bucket type barrel 1, overflow launder 3, flow divider 4, flow detector 5, control unit 6, speed change discharge apparatus 7, densitometer 8, pump 9, pump pond 10 and some connecting lines, connection line.nullWherein said pump pond 10 is for storing solid-liquid two-phase flow serosity to be fractionated，Such as ore pulp，The entrance in described pump pond 10 is connected to charging gear by feed pipe，Described pump 9 is placed in described pump pond 10，For the material pumping in pump pond 10 is exported，The pumping outlet of described pump 9 is connected to bucket type barrel 1 by feed pipe，Described bucket type barrel 1 is as shown in Figure 1，There is funnel-shaped structure，Preferred described bucket type barrel 1 includes cylindrical drum and the taper cone barrel integrally connected，Described cylindrical drum and taper cone barrel all use steel plate to make，And before and after described cylindrical drum penetrating and its diameter equal to the maximum gauge of taper cone barrel，The bottom end opening of cylindrical drum is integrally connected to the open top of taper cone barrel，Funnel-shaped structure is integrally formed，The structure of certain described bucket type barrel 1 is not limited，As long as having funnel-form sedimentation structure，Said structure belongs to preferred structure.The further preferred central authorities in the cylindrical drum of described bucket type barrel 1 are provided with material filling cylinder 2, described material filling cylinder 2 also can be cylindrical drum penetrating before and after a minor diameter, and described material filling cylinder 2 is arranged in the cylindrical drum of bucket type barrel 1 along the central axis of the cylindrical drum of bucket type barrel 1, the outlet of the feed pipe of described pump 9 is connected to described material filling cylinder 2, thus the solid-liquid two-phase flow serosity provided by pump 9 is directly injected into the middle part of bucket type barrel 1 by material filling cylinder 2, easily facilitate fine particle stage material to settle downwards to overflow and coarse fraction, as shown in fig. 1 by means of arrows, described material filling cylinder 2 is fixedly connected on the cylindrical drum inwall of bucket type barrel 1.Certainly introducing above-mentioned material filling cylinder 2 is to preferably realize material filling, but is the most therefore limited, say, that can select to be not provided with material filling cylinder 2, also may be used in the middle part of the cylindrical drum of the outlet alignment bucket type barrel 1 being now connected to the feed pipe of described pump 9.It is formed with overflow launder 3 in the periphery of the Upper cylindrical cylinder of described bucket type barrel 1, described overflow launder 3 is formed as annular groove-shaped structure around the cylindrical drum periphery of bucket type barrel 1, enters the material in bucket type barrel 1 and enters in described overflow launder 3 through the open top rim overflow of its cylindrical drum.Further on described overflow launder 3, (preferably in the overflow outlet of overflow launder), it is provided with flow detector 5, described flow detector 5 can be real-time monitoring overflow enter the slurry flow i.e. unit interval in overflow launder in overflow enter the serosity amount in overflow launder, preferred described flow detector can use existing any form of effusion meter, such as effusion meter based on supersonic liquid level, the monitoring to excess flow is realized by the liquid level change of unit interval in monitoring overflow launder, also microwave can be used, electromagnetic wave effusion meter etc., the excess flow of described flow detector 5 monitoring can the rising overflow flow velocity of serosity in accurate response serosity classification process.The output signal end of described flow detector 5 is connected to control unit 6.The bottom of described overflow launder 3 is connected to flow divider 4 by overflow passage and feeds port, described flow divider 4 preferably Electrocontrolled tee valve, including a charging port, two discharging ports and a control signal end, the load of wherein said two discharging ports can be controlled based on the automatically controlled signal of control signal end input, first discharging port of described flow divider 4 is connected to the entrance in pump pond 10 by feed back pipe, second discharging port of described flow divider 4 provides overflow material to export by overflow drain road, the control signal end of described flow divider 4 passes through connection in control unit 6, described control unit 6 is by providing control signal to control the load of two discharging ports of flow divider to flow divider, therefore flow divider inflow pump pond 10 and the inventory of overflow output can be controlled by described control unit 6.nullThe cone bottom outlet of the taper cone barrel of described bucket type barrel 1 is connected to the material inlet of speed change discharge apparatus 7，Described speed change discharge apparatus 7 is electrically connected at described control unit 6，And based on control unit provide control signal control through bucket type barrel taper cone barrel outlet at bottom discharge coarse grain footpath desilting inventory，The material outlet of described speed change discharge apparatus 7 is connected to desilting discharge line，The desilting material output of bucket type barrel can be controlled dynamically by described speed change discharge apparatus 7，Material outlet at described speed change discharge apparatus 7、It is provided with densitometer 8 on the desilting discharge line that preferably material outlet is connected，Described densitometer 8 is for monitoring the desilting material concentration discharged through speed change discharge apparatus 7 in real time，The most described densitometer is electrically connected at described control unit 6，And by the discharge material concentration values real-time Transmission monitored to control unit 6，So that described control unit 6 can control the work of associated components based on desilting discharge concentration.The most non-essential, the taper cone barrel sidewall of described bucket type barrel 1 can introduce clear water supplementary units 11, manually adjust supplementary clear water amount, strengthening classification and desliming effect by described clear water supplementary units 11.The most non-essential, described control unit 6 is electrically connected at described pump, can control the pump speed parameter of described pump, to balance material turnover amount based on the numerical value of monitoring of flow detector and/or densitometer when necessary.nullDescribed control unit can use existing electronic automatic controller，If any signal input and the proportional controller of output，The electronic automatic controller that further preferred employing is made up of SIEMENS PLC Programmable Logic Controller，For controlling relevant technological parameter，Including memorizer、Comparator and MCU，Prestore canonical parameter，And control relevant device by the contrast of actual measurement parameter with canonical parameter，So that class settling process is in optimum balance state，Realize constant speed class settling，Described control unit at least prestores excess flow scope and the standard discharge concentration range of standard，When the excess flow deviation critical field of flow monitoring instrument 5 monitoring input，To described flow divider、The control signal that the output such as pump is corresponding，With BALANCE amount，When the discharge deviation of concentration critical field of described densitometer monitoring input，To described speed change discharge apparatus output for control signal with balanced-out doses.Described speed change discharge apparatus 7 preferably includes screw pump and frequency-variable electronic device speed regulator, and described densitometer is preferably the densitometer being made up of gamma ray density meter.
Below the method utilizing described solid-liquid grading plant to carry out solid-liquid two-phase flow serosity classification is described in detail, specifically includes following steps:
Step one, complete preliminary preparation, solid-liquid two-phase flow serosity is provided to pump pond 10 including by feed pipe, and start pump 9 and provide classification material to bucket type barrel 1, start control unit 6 simultaneously, flow detector 5, flow divider 4, the relevant devices such as speed change discharge apparatus 7 and densitometer, after solid-liquid two-phase flow serum materials enters bucket type barrel 1, solids in serosity are due to particle diameter, the difference of proportion etc. starts classification of sedimentation, wherein fine particle stage material to overflow and finally outwards exports fine fraction overflow product (overflow) through overflow launder, coarse fraction material settles downwards and eventually through speed change discharge apparatus output coarse fraction sedimentation product (desilting).
Step 2, stablize the rising excess flow of bucket type barrel.For ensureing according to waiting reduction of speed degree classification of sedimentation to go out fine fraction product and coarse fraction product, need rising flooding velocity and the sedimentation velocity of serosity in monitoring bucket type barrel 1 in real time, and keep both balances.nullFirst by stable for the rising excess flow in bucket type barrel in the range of standard constant，Concrete by described flow detector 5、Flow divider 4(and/or pump 9) and control unit 6 composition rising excess flow control unit，In order to adjust and to stablize overflow size separation granularity，Because when bucket type barrel 1 rising excess flow and accelerating，The granularity of classification is thicker，And when rising excess flow and being slack-off，Partition size is thinner，By adjusting excess flow with regard to adjustable partition size，Stablize overflow flow velocity and just can stablize partition size，The most supporting above-mentioned rising excess flow control unit，When flow detector therein detects that the excess flow entered in overflow launder diminishes，Show that bucket type barrel rises flooding velocity and declines、Settle downwards quickening，Need to increase the inlet amount in bucket type barrel，The signal output that flow detector 5 detects processes to control unit 6，Described control unit prestores the excess flow scope of standard，When the excess flow of flow detector detection is less than critical field，Described control unit controls to enter the flow of the solid-liquid two-phase flow serosity in bucket type barrel and increases，This control mode preferably can realize by increasing the flow divider 4 shunt volume to pump pond，Flow divider 4 has two discharging ports as mentioned above，Respectively by return duct and overflow drain road outputting material，Wherein return duct is connected to pump pond，Therefore control unit exports control signal to flow divider，Control flow divider and increase the shunt volume (minimizing of overflow output correspondence) to pump pond return duct，Described pump is arranged in pump pond，In the normal pump speeds range of operation of pump，Pump speed output flow can be improved by the liquid level in the inlet pressure i.e. pump pond of increase pump，Therefore when increasing flow divider shunt volume in pump pond，In causing pump pond, liquid level raises，And then the pump discharge of pump 9 strengthens，The mass flow being so pumped in bucket type barrel will increase，The excess flow causing bucket type barrel increases，In the range of making excess flow return to established standards value，Therefore the rising overflow flow velocity of scoop device is stabilized，Stabilize partition size.nullShould detect when the excess flow entered in overflow launder becomes big by flow detector therein together，Show that bucket type barrel rises flooding velocity very fast、Constant speed sedimentation is slower，Need the appropriate inlet amount reducing bucket type barrel，The signal output that flow detector 5 detects processes to control unit 6，Described control unit is by comparing to determine the excess flow of flow detector detection higher than critical field，The flow that need to control to enter the solid-liquid two-phase flow serosity in bucket type barrel reduces，The most described control unit exports control signal to flow divider，Control flow divider and reduce the shunt volume (increase of overflow output correspondence) to pump pond return duct，In causing pump pond, liquid level declines，And then the pump discharge of pump will reduce in pump pond，The mass flow being so pumped in bucket type barrel will reduce，The excess flow causing bucket type barrel reduces，In the range of making excess flow return to established standards value，Therefore the rising overflow flow velocity of scoop device is stabilized，Stabilize partition size.In most cases, by controlling flow divider slurry diversion amount in pump pond, in utilizing pump pond, liquid level change causes pump inlet pressure to change, and then causes the change of pump discharge can effectively balance the change rising excess flow, is stablized in constant critical field.Further preferred also can balance rising overflow flow velocity by controlling the pump speed of pump, i.e. as shown in dotted line in accompanying drawing 1, control unit is electrically connected at pump further, when the excess flow that flow detector 5 detects is less than critical field, control unit improves the control signal of pump speed to the output of described pump, when the excess flow that flow detector 5 detects is higher than critical field, control unit reduces the control signal of pump speed to the output of described pump, thus by the constant range of the above-mentioned overflow flow speed stability of bucket type barrel.The mode that the further preferred pump speed taked and flow divider shunt volume control to combine simultaneously stably rises overflow flow velocity, and the most therefore the present invention is limited.Ascending water speed can be stablized by stable rising overflow flow velocity, thus stabilize partition size, it is ensured that classification quality and efficiency.
Step 3, the desilting discharge concentration of bucket type barrel stablized.For ensureing according to waiting reduction of speed degree classification of sedimentation to go out fine fraction product and coarse fraction product, in addition to the rising overflow flow velocity needing stable slurry, in addition it is also necessary to the desilting discharge concentration after stable slurry sedimentation.nullConcrete by speed change discharge apparatus 7、Densitometer 8 and control unit composition desilting discharge concentration control unit，Detect in real time based on discharge concentration and discharge concentration is stablized in critical field，Concrete densitometer detects the concentration of the desilting material that the speed change discharge apparatus installed through bucket type barrel desilting exhaust end is discharged in real time，And by the desilting concentration real-time Transmission that detected to control unit，Described control unit prestores the desilting concentration range of standard，When the desilting concentration receiving densitometer detection exceeds the critical field wherein prestored，Described control unit exports control signal to speed change discharge apparatus，The discharge velocity controlling described speed change discharge apparatus increases，To balance desilting discharge concentration by the increase of withdrawal rate，When the critical field prestored during the desilting concentration that densitometer detects is less than control unit，Described control unit exports control signal to speed change discharge apparatus，The discharge velocity controlling described speed change discharge apparatus reduces，To improve desilting concentration by the reduction of withdrawal rate.By this Concentration Testing feedback control, by stable for the desilting discharge concentration of bucket type barrel in critical field.
nullThe present invention utilizes bucket type barrel to carry out the classification of sedimentation of solid-liquid two-phase flow serosity，Based on solid matter particle diameter and the difference of proportion，Gravitational settling is utilized to realize the high-quality classification of fine fraction product and coarse fraction product，Wherein fine fraction product rises overflow in bucket type barrel，Coarse fraction product settles discharge in bucket type barrel，Rising excess flow to bucket type barrel and the desilting discharge concentration of present invention innovation have carried out real-time detection，And based on detecting inlet amount and the withdrawal rate of signal feedback control bucket type barrel，By the most stable in default critical field to rising excess flow and the desilting discharge concentration of bucket type barrel，Ensure that constant speed classification of sedimentation，And finally classification goes out high-quality fine fraction product and coarse fraction product，Substantially increase classification quality，It is simultaneously based on the Electric automatic control of control unit，Achieve the full-automation of two phase flow serosity class settling process，Substantially increase classification efficiency，Scheme of the present invention can be widely applied for environmental protection、Mine、Metallurgical、Building materials、Solid-liquid stock grading in multiple industry field such as chemical industry，There is wide market prospect.
Below being only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned preferred implementation, and all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that, for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, should be regarded as protection scope of the present invention.
Claims (7)
- null1. a solid-liquid grading plant，It is characterized in that，Including: bucket type barrel、Overflow unit、Material feeding unit、Material deliverying unit、Rise excess flow control unit and desilting discharge concentration control unit，Described overflow unit is arranged at the open top periphery of bucket type barrel，For providing fine fraction overflow output of products，Described material feeding unit is connected to the top entry of bucket type barrel，For the solid-liquid two-phase flow serosity to be fractionated to the offer of bucket type barrel，Described material deliverying unit is arranged at the outlet at bottom of bucket type barrel，For providing coarse fraction desilting output of products，Described rising excess flow control unit is by constant in critical field for the excess flow of bucket type barrel，The desilting constant concentration that bucket type barrel is discharged by described desilting discharge concentration control unit is in critical field，Described overflow unit includes the overflow launder (3) being arranged at bucket type barrel open top periphery，The bottom of described overflow launder connects overflow drainage line；Described material feeding unit includes pump pond (10), pump (9) and pump tubing length, and described pump (9) is arranged in pump pond (10), and is pumped in bucket type barrel by pump tubing length by the solid-liquid two-phase flow serosity in pump pond (10)；Described material deliverying unit includes speed change discharge apparatus, and the material inlet of described speed change discharge apparatus is connected to the outlet at bottom of bucket type barrel, and the material outlet of described speed change discharge apparatus connects desilting discharge line；Described overflow launder is provided with flow detector (5), described desilting discharge line is provided with densitometer (8), flow divider (4) it is provided with in described overflow drainage line, described flow divider (4) includes two discharging ports, first discharging port is connected to described pump pond (10) by overflowing back pipe material, second discharging port connects overflow drain road, provides fine fraction overflow output of products by described overflow drain road；Described solid-liquid grading plant also includes control unit (6), described control unit (6) is connected to described flow detector (5), densitometer (8), speed change discharge apparatus (7) and flow divider (4), and prestores excess flow scope and the desilting concentration range of standard in described control unit.
- Solid-liquid grading plant the most according to claim 1, it is characterized in that, described rising excess flow control unit includes described flow detector (5), flow divider (4) and control unit (6), when flow detector (5) detects during the excess flow entering overflow launder is less than control unit the standard excess flow scope prestored, described control unit controls described flow divider (4) and increases the overflow shunt volume to described pump pond, when described flow detector (5) detects during the excess flow entering overflow launder is higher than control unit the standard excess flow scope prestored, described control unit controls described flow divider (4) and reduces the overflow shunt volume to described pump pond；Described desilting discharge concentration control unit includes described densitometer (8), speed change discharge apparatus (7) and control unit (6), when described densitometer detects and is less than in control unit, through the desilting concentration that desilting discharge line is discharged, the standard desilting concentration range prestored, described control unit controls described speed change discharge apparatus and reduces desilting output, when described densitometer detects and is higher than in control unit, through the desilting concentration that desilting discharge line is discharged, the standard desilting concentration range prestored, described control unit controls described speed change discharge apparatus and increases desilting output.
- Solid-liquid grading plant the most according to claim 2, it is characterized in that, described control unit is connected to described pump, when described flow detector (5) detects during the excess flow entering overflow launder is less than control unit the standard excess flow scope prestored, described control unit controls described pump and increases pump speed, when described flow detector (5) detects during the excess flow entering overflow launder is higher than control unit the standard excess flow scope prestored, described control unit controls described pump and reduces pump speed.
- Solid-liquid grading plant the most according to claim 1, it is characterized in that, described bucket type barrel is Upper cylindrical cylinder, the barrel of funnel structure of lower cone cylinder, and the bottom end opening of cylindrical drum is integrally connected to the open top of taper cone barrel, center of inside in described cylindrical drum is provided with material filling cylinder (2), the outlet of described pump tubing length is connected to the open top of material filling cylinder (2), the cone bottom outlet of described taper cone barrel is connected to the material inlet of described speed change discharge apparatus, described overflow launder (3) is formed as annular groove-shaped structure around the open top periphery of described cylindrical drum.
- Solid-liquid grading plant the most according to claim 4, it is characterised in that also include clear water supplementary units, described clear water supplementary units is connected to the taper cone barrel sidewall of described bucket type barrel (1).
- 6. according to the solid-liquid grading plant described in any one of claim 1-5, it is characterised in that described control unit includes that input/output module, memorizer, comparator and MCU, described input/output module, memorizer and comparator are connected to described MCU.
- 7. according to the solid-liquid grading plant described in any one of claim 1-5, it is characterized in that, described flow divider (4) is Electrocontrolled tee valve, described flow detector is supersonic liquid level effusion meter, microwave meter or electromagnetic wave effusion meter, described speed change discharge apparatus (7) includes screw pump and frequency-variable electronic device speed regulator, described densitometer is the densitometer being made up of gamma ray density meter, and described control unit is to use the electronic automatic controller of SIEMENS PLC Programmable Logic Controller composition.
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| CN201410646044.1A CN104475230B (en) | 2014-11-15 | 2014-11-15 | Solid-liquid grading device |
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| CN106383073B (en) * | 2016-09-21 | 2023-03-24 | 迈安德集团有限公司 | Method for automatically grading micro-fine particle grade material by adopting experimental system |
| CN106391292A (en) * | 2016-10-31 | 2017-02-15 | 中国矿业大学 | Liquid-solid fluidized bed sorting machine and material sorting method employing same |
| CN106680160B (en) * | 2017-02-28 | 2023-10-20 | 广西大学 | Continuous hydraulic analyzer adopting updraft method and analysis method thereof |
| CN110420750A (en) * | 2019-07-11 | 2019-11-08 | 中国恩菲工程技术有限公司 | For being classified the device of silicon carbide |
| CN110420751A (en) * | 2019-07-11 | 2019-11-08 | 中国恩菲工程技术有限公司 | For being classified the device of aluminium hydroxide |
| CN110420748A (en) * | 2019-07-11 | 2019-11-08 | 中国恩菲工程技术有限公司 | For being classified the device of ternary precursor |
| CN110420749A (en) * | 2019-07-11 | 2019-11-08 | 中国恩菲工程技术有限公司 | For being classified the device of silicon and silicon carbide |
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| US4119532A (en) * | 1976-09-10 | 1978-10-10 | Park Moon C | Beneficiation method |
| JP2001232233A (en) * | 2000-02-21 | 2001-08-28 | Putsumaisutaa Japan Kk | Treatment apparatus for unhardened concrete sludge |
| CN2782219Y (en) * | 2004-12-24 | 2006-05-24 | 化学工业部连云港设计研究院 | Hydraulic power separator |
| CN1876241A (en) * | 2005-06-10 | 2006-12-13 | 吕宪俊 | Highly effective concentration technology for milltailings |
| CN103331205B (en) * | 2013-06-04 | 2015-08-19 | 广西华锡集团股份有限公司 | A kind of fuzzy closed circuit Self-tuning System dynamic hydraulic cyclone grader |
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