CN104984588A - Suspension liquid continuous filtration thickening device and continuous filtration thickening method thereof - Google Patents
Suspension liquid continuous filtration thickening device and continuous filtration thickening method thereof Download PDFInfo
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- CN104984588A CN104984588A CN201510385872.9A CN201510385872A CN104984588A CN 104984588 A CN104984588 A CN 104984588A CN 201510385872 A CN201510385872 A CN 201510385872A CN 104984588 A CN104984588 A CN 104984588A
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Abstract
The invention discloses a suspension liquid continuous filtration thickening device and a continuous filtration thickening method thereof which are suitable for industries including metallurgy, chemical engineering and the like. The filtration and thickening of suspension liquid are concentrated into the specially-designed continuous filtration thickening device of the suspension liquid, the function of mechanical stirring is fully used, the automatic clearance of mud on the surface of a filter bag is achieved, therefore, the dynamic condition of the liquid penetrating through the filter bag is effectively improved, and the speed of the liquid penetrating through the filter bag is greatly improved. The liquid penetrating through the filter bag is infiltrated naturally through a filter cloth, so that the quality of filtrate is greatly improved. The suspension liquid continuous filtration thickening device is compact in structure, high in operation efficiency, good in quality of the filtrate, simple and convenient to operate and suitable for large-scale industrial production of suspension liquid solid-liquid separation.
Description
Technical field
The present invention relates to the dense device of a kind of suspension continuous filtration and the dense method of continuous filtration thereof, belong to metallurgical and chemical field.
Background technology
Dense and the filtration of suspension is metallurgical and that chemical engineering process is common operation.Suspension is different from general liquid; there are some special natures; when Solids Particle Diameter is greater than 0.1 μm; suspension is unstable; especially when density of liquid phase differs larger with solid Density; because of gravitate, solid particle can be formed precipitation and and fluid separation applications, industrial this separation method is called gravitational settling.It is larger that gravitational settling is applicable to processing solid-liquid density difference, and solids content is not quite high, and the suspension that treating capacity is larger.
Gravitational settling operation is generally divided into dense and clarification two classes.Dense object is mainly by suspension thickening, and the object of clarification then mainly removes a small amount of suspension from rarer suspension.The equipment of these two kinds of settling operation is called subsider and defecator, is industrially referred to as concentrator.
Suspension obtains supernatant and bed mud after concentrator process.Bed mud removes solid suspension through cake filtration, and supernatant just can obtain qualified solution through clarification filtration again.Concentrator suspension-treating is adopted to there is equipment investment large, in unit interval, the suspension vol of concentrator unit cross-sectional area process is little, and when density of liquid phase and solid Density are more or less the same, sedimentation separation efficiency is low, even cannot be separated, now have to adopt sedimentation filtration groove.
So-called sedimentation filtration groove is exactly the subsider of band filter, and it is made up of cell body, screen pipe, scraper etc.Hang with in sedimentation filtration groove and be drained through chimney filter more, the tube wall of screen pipe has aperture, overcoat filter cloth, and whole filter is immersed under the liquid level of suspension in subsider.Sedimentation filtration groove adopts vacuum suction filter, and compress wind is interrupted blowback desliming, and the heavy mud that blowback splits away off is shifted to mud discharging mouth by scraper.When solids in suspension content is 1-10%, the deposit thickness in 1 minute of the filter mud on filter cloth can reach 3-6mm, and the rate of filtration of filter cloth is dropped rapidly to 0.1m
3/ m
2below min.Another defect of sedimentation filtration groove is that filtrate quality cannot ensure: compress wind blowback desliming, easily causes filter cloth discontinuous thoroughly to filter; If running has the filter cloth of a screen pipe damaged, whole filtrate is all muddy.Therefore, the solution obtained through sedimentation filtration groove again through clarification filtration, must could meet the requirement of general technology.
Summary of the invention
The present invention is exactly for the problems referred to above, a kind of operating efficiency proposed is high, solid-liquor separation is effective, structure is simple, the easy to operate dense device of suspension continuous filtration, it can expand the production scale that solid-liquid suspension is separated as required, and realize suspension continuous filtration dense-the full technical process of scum washing.
The invention is characterized in, the dense device of a kind of suspension continuous filtration, comprise lautertuns and agitating device, described lautertuns comprises cell body with the support be arranged on cell body on side opening or/and cover plate, from top to bottom filter cylinder and filter plate are installed successively in described cell body, described filter cylinder and filter plate are all connected with the inner wall sealing of cell body, compartition in cell body is the first filtering area and the second filtering area by described filter cylinder and filter plate, described cell body is provided with charging aperture and overfall in the upside of the first filtering area, described cell body is provided with sewage draining exit and filter plate wash liquor inlet at the second filtering area near the position of filter plate, the bottom of described cell body is provided with discharging opening, support on described cell body on side opening is or/and cover plate is provided with agitating device and filter cylinder wash liquor inlet, the mixing component of described agitating device is arranged in described first filtering area.
Described agitating device adopts dasher or anchor agitator or gate stirrer or propeller agitator or turbine agitator, and the rotating speed of described agitator is 20-250r/min.
Described cell body is 1-30mm thick carbon steel or stainless steel or the individual layer of fiberglass or plastic production or the cylindrical shape of chuck or square tubular construction, and the bottom of described cell body is the flat or oval end or conical bottom.
Described filter cylinder comprises cylindrical shell, filter bag and support frame, the barrel of described cylindrical shell and bottom are provided with the oval square or rectangular through hole of circle of multiple 1-50mm, the diameter of described cylindrical shell is 1:0.1-10 with the ratio of its height, the filter bag that filter medium is made is set with inside described cylindrical shell, being provided with the support frame matched with its size in described filter bag is fixed on inside cylindrical shell by filter bag, described filter plate is provided with the oval square or rectangular through hole of circle of multiple 1-50mm, and described filter plate upper surface has laid the filter cloth made by filter medium.
Described cell body inwall is provided with upper strata flange and lower floor's flange, described filter bag and filter cylinder are fixed on the flange of upper strata by the first annular preform and seal washer, described filter plate and filter cloth are fixed on lower floor's flange by the second annular preform and seal washer, and described cell body outer wall is provided with liquid level gauge.
The distance of described filter plate bottom filter cylinder is 5-150cm, is provided with spray washing device in the space between described filter plate and filter cylinder.
Described cylindrical shell is made by the thick carbon steel or stainless steel of 1-20mm or titanium alloy or fiberglass or plastics, and described filter plate is made by the thick carbon steel or stainless steel of 1-50mm or fiberglass or plastic plate.
Described filter medium is at least one in filter cloth, filter membrane, organic or inorganic sintered porous material.
The dense device of multiple described suspension continuous filtration adopts mode that is in parallel or series connection to connect, time in parallel, be connected with combined feed pipe after the charging aperture parallel connection of the dense device of multiple described suspension filtered, during series connection, the overfall of the dense device of described suspension filtered is connected with the charging aperture of the adjacent dense device of another suspension filtered.
A kind of dense method of suspension continuous filtration, charging aperture, overfall, discharging opening and sewage draining exit are provided with control valve, and be also provided with densimeter or viscosimeter at charging aperture and overfall, concrete grammar is as follows:
A, filter dense operation: the control valve of first closing sewage draining exit, open charging aperture again, the control valve of overfall and discharging opening, then agitating device is started, suspension is joined in the dense device of continuous filtration by charging aperture, the filtrate that suspension is obtained by filter bag and filter cloth twice filtration is successively flowed out from discharging opening, the solid suspension tackled by filter bag then under stirring, automatically get off from filter bag removing surface, and discharge from overfall, the cocnentration factor of suspension is the difference according to charging aperture and overfall densimeter or viscosimeter display data in the process, control by regulating the aperture of overfall and discharging opening valve,
B, cleaning filter cloth: along with the liquid level increasing liquid level gauge display of filter cloth surface mud alluvial can slowly rise, and according to the height that liquid level gauge liquid level rises judge that filter cloth surface mud deposits number, when liquid level rises 5-150cm, filtration is stopped to carry out blowdown; During blowdown operation, first close the control valve of charging aperture and discharging opening, then open the control valve of sewage draining exit, then the mud on spray washing device cleaning filter cloth surface is opened, the mud washed down is discharged from sewage draining exit, after blowdown terminates, proceeds to filter dense operation.
The present invention has the following advantages and effect compared with prior art:
Owing to adopting said apparatus, function that is dense and that filter is concentrated in this device dexterously, it is compared with traditional sedimentation filtration groove, the mud layer that during operation, filter bag surface is formed is thin, and the Automatic continuous cleaning of filter bag surface mud can be realized under stirring, significantly improve the dynamic conditions of solution through filter bag, greatly improve the rate of filtration of suspension, the rate of filtration can by 0.05-0.1m
3/ m
2min brings up to 1-10m
3/ m
2min.In addition, because filter bag does not need blowback or backwash, solution, through the constant airspeed of filter bag, has effectively stopped the generation that suspension is interrupted filter phenomenon thoroughly.Through the filter cloth natural filtration of solution again on filter plate of filter bag, filtrate quality is further enhanced, without the need to carrying out clarification filtration again before gained solution uses.In addition, by changing the flow-rate ratio of discharging opening and overfall, the cocnentration factor of adjustable suspension, and according to technique needs, sealed thermal insulating or the dense process of cold filtration of suspension can be realized.
In sum, this device makes full use of churned mechanically effect, realizes the Automatic clearance of filter bag surface mud, thus effectively improves the dynamic conditions of penetration by liquid filter bag, greatly improves the speed of penetration by liquid filter bag.Through the liquid of filter bag again through filter cloth natural filtration, filtrate quality is greatly improved.This apparatus structure is compact, and operating efficiency is high, and filtrate quality is good, easy and simple to handle, is applicable to the large-scale industrial production that solid-liquid suspension is separated.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, and following examples are intended to the present invention instead of limitation of the invention further are described.
As shown in Figure 1, the dense device of a kind of suspension continuous filtration of the present invention's design, is made up of lautertuns 1 and agitating device 2.Described agitating device 2 is made up of transmission device and agitator, described agitator comprises vertical shaft and mixing component, described mixing component is arranged in described first filtering area, and lautertuns 1 is by cell body and be used for installing the support of fixing agitating device 2 and filter cylinder wash liquor inlet 3 or/and cover plate forms.The individual layer or jacket structured that cell body adopts the thick carbon steel or stainless steel of 1-30mm or fiberglass or plastics to make, cell body inwall is with upper and lower two-layer flange, respectively in order to support filter cylinder 5 and filter plate 10, cell body has charging aperture 4, filter plate wash liquor inlet 8, discharging opening 17, sewage draining exit 12 and overfall 15, and described charging aperture 4, filter plate wash liquor inlet 8, discharging opening 17, sewage draining exit 12 and overfall 17 are all provided with valve, liquid level gauge 16 is housed outside cell body.
Filter cylinder 5 is made by the thick carbon steel or stainless steel of 1-20mm or titanium alloy or fiberglass or plastics, the diameter of filter cylinder 5 is 1:0.1-10 with the ratio of its height, the barrel of filter cylinder and bottom are provided with the aperture of multiple 1-50mm, the filter bag 6 that inner sleeve has filter medium to make, support frame 13 is placed with in filter bag, filter bag 6 is fixed on the upper strata flange of cell body by annular preform 14 and seal washer together with filter cylinder 5, suspension and filter bag permeate is separated.
Filter plate 10 is made by the thick carbon steel or stainless steel of 1-50mm or fiberglass or plastic plate, filter plate has the aperture of multiple 1-50mm, its upper surface has laid the filter cloth 7 made by filter medium, filter plate 10 and filter cloth 7 are fixed on lower floor's flange of cell body by annular preform 11 and seal washer, filter bag permeate and filter cloth permeate are separated, filter plate 10 is 5-150cm apart from the height bottom filter cylinder 5, and filter plate 10 to filter cylinder 5 bottom space is equipped with filter cloth spray washing device 9.When the dense needs insulation of suspension filtered or cooling, cool by chuck heating or chuck the processing temperature maintained needed for technical process.
Filter medium is selected from least one in filter cloth, filter membrane, organic or inorganic sintered porous material.
One as said apparatus is applied, dense for multiple suspension continuous filtration device parallel connection can be used, form the dense device of a kind of suspension continuous filtration, be connected with combined feed pipe after the charging aperture parallel connection of the dense device of multiple described suspension continuous filtration, thus the production scale of solid-liquid suspension separation can be expanded.
Another kind as said apparatus is applied, dense for multiple suspension continuous filtration device series connection can be used, form the dense device of a kind of suspension continuous filtration, the overfall of the dense device of described suspension continuous filtration is connected with the charging aperture of the adjacent dense device of another suspension continuous filtration, thus can realize suspension continuous filtration dense-the full technical process of scum washing.Scum washing technical process is, the filter mud that overfall 15 flows out is imported in the filter cylinder 5 of the dense device of next suspension continuous filtration, and add wash water from filter cylinder wash liquor inlet 3, by agitator treating, filter dense, realize the strengthening rinse cycle of mud, reduce the entrainment of solute in filter mud.
The method using this device to realize suspension continuous filtration dense is as follows:
By charging aperture 4, suspension is joined in filter cylinder 5, enter into the first filtering area, first liquid in suspension enter into the second filtering area through filter bag 6 under the effect of gravity and centrifugal force, the solid suspension tackled by filter bag 6 then under stirring, automatically get off from filter bag 6 removing surface, discharge from overfall 15 in the mode of overflow, thus realize the continuous filtration of suspension and dense process, and by regulating overfall 15 to control the cocnentration factor of suspension with the flow-rate ratio of discharging opening 17.Through filter cloth 7 natural filtration that the liquid of filter bag 6 is laid on filter plate 10 again, remove the trace solid suspension carried secretly in the liquid through filter bag 6, the liquid obtained by twice filtration is flowed out from discharging opening 17.If the solid suspension content entering the suspension of filter cylinder 5 is lower, by regulating the flow of discharging opening 17, the solid suspension that filter bag 6 is tackled regularly is arranged from overfall 15.Then discharged from sewage draining exit by the solid suspension that filter cloth 7 is tackled, blowdown operation carries out when filter cloth is cleared up, filter cloth manner of cleaning up is: close charging aperture 4 and discharging opening 17, open sewage draining exit 12, by the deposit on impulsive force cleaning filter cloth 7 surface that filter bag 6 permeate freely falling body produces, or unlatching spray washing device 9 cleans the deposit on filter cloth 7 surface, to improve its infiltration rate.
Embodiment 1
Certain extracting vanadium from stone coal enterprise, employing suspension continuous filtration dense device process solid content is the bone coal acidleach slurry of 20%, and bone coal acidleach slurry flow is 20m
3/ h.The dense device of suspension continuous filtration selects Φ 1200 × 1200mm stainless steel filter cylinder, and filter bag is that 250 object woven dacrons are made by filtering accuracy, and the filter medium that filter plate is laid is 350 object woven dacrons.The filtrate that the dense device of suspension continuous filtration obtains is as clear as crystal, and solid content < 0.01% can meet the requirement of solvent extraction vanadium extraction feed liquid.The mud solid content that overfall is discharged reaches 60%, and mud adopts 5 dense device counter flow in series washings of suspension continuous filtration.The wash water pH that 5th grade of dense device of suspension continuous filtration obtains is 6.1, V concentration is 0.7mg/L.
Embodiment 2
Certain barium salt enterprise adopts barite to add carbon reducting roast, and calcining water logging, leachate leads to CO
2the explained hereafter brium carbonate of precipitation barium.Because calcining leachate is close to saturated BaS solution, wherein BaS concentration is 220g/L ~ 240g/L, and leachate temperature (85-90 DEG C) slightly reduces BaS will crystallization, and leachate contacts with air and easily forms polysulfide.Therefore, calcining cannot adopt traditional filter plant solid-liquor separation after leaching, and can only be after insulation clarification, gets supernatant directly logical CO
2heavy barium.But owing to containing a certain amount of suspension in supernatant, produce the brium carbonate grade obtained and only have about 98%.After this enterprise uses suspension continuous filtration dense device Steam Heating insulation filtering supernatant instead, the brium carbonate grade produced brings up to 99.8% by 98.3%.The dense device of suspension continuous filtration selects Φ 900 × 900mm carbon steel filter cylinder, the filter medium of filter cylinder is filtering accuracy is 300 object polyamide fibre filter clothes, the filter medium of filter plate is filtering accuracy is 400 object stainless steel sintered meshworks, the dense plant running of suspension continuous filtration after one month flow of filtrate be stabilized in 30m
3/ more than h.
Embodiment 3
It is the river of 2-3% is former water that the water plant of certain enterprise gets sediment charge, adopt filter cylinder to be the water for industrial use that the dense device of fiberglass suspension continuous filtration of Φ 1600 × 1600mm prepares solid content < 0.01%, it is 270 object industrial filter cloths that the filter medium of filter cylinder and filter plate is filtering accuracy.5 dense devices of suspension continuous filtration in parallel, run half a year, and the aquifer yield of average every dense device of platform suspension continuous filtration is 105.8m
3/ h, the rate of recovery of water reaches 93.6%.
Claims (10)
1. the dense device of suspension continuous filtration, comprise lautertuns and agitating device, described lautertuns comprises cell body with the support be arranged on cell body on side opening or/and cover plate, it is characterized in that: in described cell body, from top to bottom filter cylinder and filter plate are installed successively, described filter cylinder and filter plate are all connected with the inner wall sealing of cell body, compartition in cell body is the first filtering area and the second filtering area by described filter cylinder and filter plate, described cell body is provided with charging aperture and overfall in the upside of the first filtering area, described cell body is provided with sewage draining exit and filter plate wash liquor inlet at the second filtering area near the position of filter plate, the bottom of described cell body is provided with discharging opening, support on described cell body on side opening is or/and cover plate is provided with agitating device and filter cylinder wash liquor inlet, the mixing component of described agitating device is arranged in described first filtering area.
2. the dense device of suspension continuous filtration according to claim 1, it is characterized in that: described agitating device adopts dasher or anchor agitator or gate stirrer or propeller agitator or turbine agitator, and the rotating speed of described agitator is 20-250r/min.
3. the dense device of suspension continuous filtration according to claim 1, it is characterized in that: described cell body is 1-30mm thick carbon steel or stainless steel or the individual layer of fiberglass or plastic production or the cylindrical shape of chuck or square tubular construction, and the bottom of described cell body is the flat or oval end or conical bottom.
4. the dense device of suspension continuous filtration according to claim 1, it is characterized in that: described filter cylinder comprises cylindrical shell, filter bag and support frame, the barrel of described cylindrical shell and bottom are provided with the oval square or rectangular through hole of circle of multiple 1-50mm, the diameter of described cylindrical shell is 1:0.1-10 with the ratio of its height, the filter bag that filter medium is made is set with inside described cylindrical shell, being provided with the support frame matched with its size in described filter bag is fixed on inside cylindrical shell by filter bag, described filter plate is provided with the oval square or rectangular through hole of circle of multiple 1-50mm, described filter plate upper surface has laid the filter cloth made by filter medium.
5. the dense device of suspension continuous filtration according to claim 4, it is characterized in that: described cell body inwall is provided with upper strata flange and lower floor's flange, described filter bag and filter cylinder are fixed on the flange of upper strata by the first annular preform and seal washer, described filter plate and filter cloth are fixed on lower floor's flange by the second annular preform and seal washer, and described cell body outer wall is provided with liquid level gauge.
6. the dense device of suspension continuous filtration according to claim 4, is characterized in that: the distance of described filter plate bottom filter cylinder is 5-150cm, is provided with spray washing device in the space between described filter plate and filter cylinder.
7. the dense device of suspension continuous filtration according to claim 4, it is characterized in that: described cylindrical shell is made by the thick carbon steel or stainless steel of 1-20mm or titanium alloy or fiberglass or plastics, described filter plate is made by the thick carbon steel or stainless steel of 1-50mm or fiberglass or plastic plate.
8. the dense device of suspension continuous filtration according to claim 4, is characterized in that: described filter medium is at least one in filter cloth, filter membrane, organic or inorganic sintered porous material.
9. according to the dense device of suspension continuous filtration one of claim 1 to 8 Suo Shu, it is characterized in that:, it is characterized in that: the dense device of multiple described suspension continuous filtration adopts mode that is in parallel or series connection to connect, time in parallel, be connected with combined feed pipe after the charging aperture parallel connection of the dense device of multiple described suspension filtered, during series connection, the overfall of the dense device of described suspension filtered is connected with the charging aperture of the adjacent dense device of another suspension filtered.
10. the dense method of suspension continuous filtration, utilize the dense device of suspension continuous filtration that one of claim 1 to 9 is described, it is characterized in that: on charging aperture, overfall, discharging opening and sewage draining exit, be provided with control valve, also be provided with densimeter or viscosimeter at charging aperture and overfall, concrete grammar is as follows:
A, filter dense operation: the control valve of first closing sewage draining exit, open charging aperture again, the control valve of overfall and discharging opening, then agitating device is started, suspension is joined in the dense device of continuous filtration by charging aperture, the filtrate that suspension is obtained by filter bag and filter cloth twice filtration is successively flowed out from discharging opening, the solid suspension tackled by filter bag then under stirring, automatically get off from filter bag removing surface, and discharge from overfall, the cocnentration factor of suspension is the difference according to charging aperture and overfall densimeter or viscosimeter display data in the process, control by regulating the aperture of overfall and discharging opening valve,
B, blowdown operation: along with the liquid level increasing liquid level gauge display of filter cloth surface mud alluvial can slowly rise, and according to the height that the liquid level of liquid level gauge display rises judge that filter cloth surface mud deposits number, when liquid level rises 5-150cm, filtration is stopped to carry out blowdown, during blowdown operation, first close the control valve of charging aperture and discharging opening, open the control valve of sewage draining exit again, then the mud on spray washing device cleaning filter cloth surface is opened, the mud washed down is discharged from sewage draining exit, after blowdown terminates, proceed to filter dense operation.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105617972A (en) * | 2016-03-07 | 2016-06-01 | 宜兴金兑化工有限公司 | Polymerization inhibitor filtering device |
| CN106110716A (en) * | 2016-07-13 | 2016-11-16 | 浙江省海洋水产研究所 | A kind of microzooplankton settling separation device and separation method |
| CN106139903A (en) * | 2016-07-26 | 2016-11-23 | 国网辽宁省电力有限公司电力科学研究院 | For the device and method of solute rapid concentration in water |
| CN106807132A (en) * | 2017-02-15 | 2017-06-09 | 安庆师范大学 | A kind of permeable groove for sewage disposal |
| CN107099660A (en) * | 2017-06-08 | 2017-08-29 | 姜广义 | A kind of leaching of Rare Earth Production, alkali turn, excellent molten, removal of impurities and precipitation technique |
| CN108043083A (en) * | 2018-01-05 | 2018-05-18 | 无锡雪浪环境科技股份有限公司 | Deacidifying flue gas lime slurry filter |
| WO2021174809A1 (en) * | 2020-03-06 | 2021-09-10 | 深圳第三代半导体研究院 | Method and device for purifying multi-dimensional nanomaterial |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105617972A (en) * | 2016-03-07 | 2016-06-01 | 宜兴金兑化工有限公司 | Polymerization inhibitor filtering device |
| CN106110716A (en) * | 2016-07-13 | 2016-11-16 | 浙江省海洋水产研究所 | A kind of microzooplankton settling separation device and separation method |
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| CN108043083A (en) * | 2018-01-05 | 2018-05-18 | 无锡雪浪环境科技股份有限公司 | Deacidifying flue gas lime slurry filter |
| WO2021174809A1 (en) * | 2020-03-06 | 2021-09-10 | 深圳第三代半导体研究院 | Method and device for purifying multi-dimensional nanomaterial |
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Application publication date: 20151021 |