CN1291792C - Mixture air floatation type dynamic vortex flow separation method and its device - Google Patents
Mixture air floatation type dynamic vortex flow separation method and its device Download PDFInfo
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- CN1291792C CN1291792C CN 200510025503 CN200510025503A CN1291792C CN 1291792 C CN1291792 C CN 1291792C CN 200510025503 CN200510025503 CN 200510025503 CN 200510025503 A CN200510025503 A CN 200510025503A CN 1291792 C CN1291792 C CN 1291792C
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Abstract
The present invention relates to a swirling flow separation method of a mixture and a device of the method, particularly to a dynamic swirling flow separation method using an air flotation principle and a device of the method. Feed liquid enters a dynamic swirling flow separator after mixed with gas dissolving feed liquid; material generates high-speed swirling flow under the drive of a motor; light material in the mixture is aggregated at a shaft center of the separator under the action of the air flotation and the swirling flow and discharged through a discharge pipe; heavy material is discharged through the discharge pipe after the light material is removed through the strengthening function of the swirling flow. The device can regulate the flow ratio of the gas dissolving feed liquid to the feed liquid of the raw material and the rotary speed of the motor through an on-line control system to realize the standard reaching discharge or the cyclic utilization of discharge material and reduce the water ratio of the separated material. The present invention has a wide application range, totally has favorable separation effects on the separation of various mixtures and has a wide application prospect in the fields of energy saving, environmental protection, etc.
Description
Technical field
The invention belongs to environmental protection technical field, concrete analysis relates to a kind of vortex flow separation method and device thereof of mixture, particularly a kind of dynamic vortex flow separation method and device thereof that utilizes the air supporting principle.
Background technology
Usually, separating mixture mainly contains three kinds: precipitation, three kinds of air supporting and centrifugations (comprising the waterpower swirling flow).Precipitation mainly is to rely on the effect of gravity that mixture is separated; Air supporting mainly be utilize material various dissolvings in the water or that suspend original or add the method for surface-active difference that medicament produces, for example water-oil separating, the removal of algae etc. in the former water of water supply plant to separate.Centrifugation then is to rely on the effect of centrifugal inertial force and the separation process that realizes mixture.The centrifugal flow field of eddy flow the late 19th century also is a kind of of centrifugation along with the research of flow field mechanics is found from the principle of separating.Usually, precipitate and separate operating cost is minimum, but separating effect is subjected to the restriction of mixture character, and the centrifugal sedimentation speed of whirlwind or cyclone separator is bigger approximately 5～2500 times than gravity speed, thereby the effect of separating effective more than gravitational settling, but because it is higher to produce the needed energy consumption of centrifugal force, thereby energy consumption has just become maximum selections according to the swirler that the flow field mechanics is researched and developed than low preferably with separating effect.
As differing less for both density, the decentralized photo system that grain graininess is thinner, the sedimentation basin of mode such as Separation of Solid and Liquid by routine, separation such as the flotation tank of water-oil separating, very low from efficient, if using centrifugation (or swirling flow separation) instead then can improve separating rate greatly, equipment size can dwindle a lot.1891, E.Bretney at U. S. application first hydrocyclone patent of utilizing the centrifugal flow field of swirling flow to separate in the world, and at first be used for the operation of coal slime water clarification in a colliery of Holland in nineteen thirty-nine.
Cyclone is the equipment that is used for parting liquid/liquid, solid-liquid body mixture that grows up much larger than the principle of gravitational field according to the centrifugal flow field of swirling flow, above liquid liquid mixture or the solidliquid mixtures of separable several microns.Usually, typical swirling flow separation equipment system has comprised several aspects: pump, flowmeter, cyclone separator and associated conduit, the mixture material tangentially enters cyclone at a high speed through pump pressurization back, in the cylinder of cyclone separator, produce the high speed rotational flow field, the component that density is big in the mixture moves downward under the effect of rotational flow field simultaneously vertically, radially outwards motion, move downward along wall in the arrival cone segments, and discharge by underflow opening; This has just formed outer swirling flow field; The component that density is little is in harmonious proportion to central axis moves, and forms an interior vortex that moves upward in axis centre, is discharged by overfall then, and this has just reached two purposes that are separated.Chinese patent CN85100767A, CN2405660Y, U.S. Pat 4237006 and US4231368 have provided respectively and can be used for swirling device that immiscible mixture separates and internal structure thereof, dimension scale.China ZL91109284, ZL01108251 and BP GB2211765B have provided the bus formula of swirling flow accelerating cavity especially, but still there are some technical problems in these static swirling flow patents in application process, for example liquid flows the liquid supply pressure height, the pressure loss is big, specified treating capacity swirling flow centrifugal force little and that produce is not strong etc., thereby has influenced the effect of separating.
Have a kind of pressurized dissolved air flotation formula waterpower swirling flow oil one moisture from device patent (China Patent No. 200310119024), by before static hydraulic vortex flow devices, adding a pressure air-dissolving equipment, make air be dissolved under the higher pressure after feed liquid reaches capacity, enter hydraulic vortex flow devices again, the air supporting effect that utilizes molten gas in the waterpower swirling flow, to produce, with an oily moisture from, this patent can obtain an oily preferably moisture from effect, can not separate the close mixture of proportion but still unresolved static swirling flow technology swirling flow centrifugal force is less relatively, specified treating capacity is little, problems such as liquid supply pressure height.
Be directed to this problem that static cyclone separator exists, the external novel Dynamic Separation device (U.S. Pat 5084189) that utilizes the swirling flow separation principle of having developed in the nineties in 20th century, this device is to grow up on the basis of anti-clogging axial-flow pump (U.S. Pat 3786996), high speed rotation by housing produces swirling flow, under the effect of built-in helical blade, rotation at a high speed takes place and advances with a kind of motion mode of helical type in fluid, and centrifugation takes place simultaneously.The swirling flow centrifugal force that the swirling flow of this shell type produces is big more a lot of than static cyclone separator, but this patent adopts two impellers to be the spiral form impeller, and current are had bigger shearing force, and level of disruption is bigger, thereby the operation of device and applying is restricted.
Summary of the invention
The purpose of this invention is to provide a kind of efficient dynamic vortex flow separation method and device thereof.The exemplary of the mixture that these apparatus and method are separated is an oil-polluted water, it be people live or produce in the various lots of sewage that produces, the sewage that produces in the fields such as for example oil exploitation, refining, transportation, chemical industry, machine-building, food processing the present invention relates to but is not limited to deoiling of oil-polluted water.
The dynamic vortex flow separation method that the present invention proposes is to charge into an amount of molten gas feed liquid before the raw material feed liquid enters dynamic hydraulic vortex flow devices, enters dynamic hydraulic vortex flow devices again and separates.Motor drives enters the feed liquid of dynamic vortex flow separator and rotates at a high speed, molten gas produces the air supporting effect because of different with the proportion of feed liquid in the waterpower swirling flow, swirling flow and pneumatically supported double action issue oil generation one moisture from, thereby make an oily moisture greatly improve from ability; Simultaneously, the molten gas of injection forms air layer in the axle center under the effect of swirling flow, thereby the water content in the oil when having reduced discharging has more practicality on the whole, helps environmental protection.Wherein, the flow-rate ratio of controlling molten gas feed liquid and feed stream is 10: 1-1: 5, and dissolved-air pressure is 0.1-0.4MPa,, motor speed is 500-5000rmp.
The dynamic vortex flow separator that the present invention proposes is connected and composed by the road by molten gas feed liquid distributor 4, dynamic vortex flow separator 1, motor 10 and automatic monitoring equipment 15 etc.; Dynamic vortex flow separator 1 is made up of rotational shell 8 and pre-rotary vane assembly 13 and reducing pipe 11 etc., pre-rotary vane assembly 13 has two groups, be symmetrically distributed in the rotational shell 8, reducing pipe 11 is arranged at the downside of rotational shell 8, and reducing pipe 11 lower ends are provided with discharging opening 12; The top of dynamic vortex flow separator 1 is provided with charging aperture 7, and upper side is provided with feed pipe 6; Motor 10 is connected with dynamic vortex flow separator 1 by drive disk assembly 9, and drives rotational shell 8 rotations.Its structure such as Fig. 1, shown in Figure 3.
Among the present invention, the diameter of the rotational shell 8 of dynamic vortex flow separator 1 is designated as D1, and the length of water inlet and rotational shell is designated as L1; Feed pipe 6 cross sections are a rectangle, adopt tangential admission, the length of rectangle and wide a, the b of being designated as respectively; The diameter of charging aperture 7 is designated as D2, and discharging opening 12 diameters are designated as D3; The length of reducing pipe 11 is designated as L2; As shown in Figure 2.Wherein, D2/D1 is 0.1～0.6, and D3/D1 is 0.1～0.5, and L1/D1 is 0.5～3.6, and L2/D1 is 0.3～6, and a＞b, ab are 0.02～0.15[π (D1)
2].Two groups of pre-rotary vane assemblies 13 of symmetrical distribution are arranged in rotational shell 8, and every group of blade has 1～5, and it is streamlined that blade is water droplet, and its center line is designated as α 1, α 2 with the angle of central shaft respectively ... α 5,0≤α i≤45 ° (i=1,2,3,4,5); Rotational shell 8 adopts bearing fixing, and rotation at a high speed can take place under the drive of motor, its with the two ends fixture between adopt rationally and seal.The rotational shell 8 of dynamic vortex flow separator 1 is driven by driving member 9 by motor 10, and the range of speeds of motor can be regulated, and is 0～5000rmp.
Automatic monitoring control equipment of the present invention is mainly connected to form through pipeline successively by flow valve 5, controller 15 and on-line monitoring instrument 14, adjust the charge ratio of the rotating speed of motor 10, molten gas feed liquid 3 and raw material feed liquid according to on-line monitoring or personal monitoring's result, thereby realize the qualified discharge of effluent quality and fuel-displaced low-water-content; The on-line monitoring instrument can be selected according to the target of separating, but controller 15 is editorial logic controller (PLC) or computer.
Use the using method of the device of air floatation type dynamic vortex flow separation to be: after molten gas feed liquid 3 mixes by molten gas feed liquid distributor 4 and raw material feed liquid through valves 5, enter in the dynamic vortex flow separator 1 by tangential admission mouth 6, carrying out air floatation type dynamic vortex flow separates, under the drive of motor 10, the guide vane 13 of rotation drives the swirling flow of material generation high speed at a high speed, material light in the mixture is under the effect of swirling flow, assemble in axle center to the dynamic vortex flow separator, simultaneously, because the adding of molten gas, make the air supporting effect that produces in the swirling flow process push the light feed liquid in the mixed liquor to axle center; Axis of rotation in mixed feed liquid is an air layer, outwards is oil reservoir and water layer successively, thereby can pass through to regulate the charge ratio of molten gas feed liquid 3 and raw material feed liquid, the moisture content of the light feed liquid that reduction charging aperture 7 is discharged, the effluent quality of raising discharging opening 12; Heavy material is discharged by discharging opening 12 after strengthening the light material of removal through the swirling flow effect of reducing pipe 11 again.
Automatic control system realizes by on-line monitoring instrument 14 or personal monitoring and input results: when effluent quality is up to standard, water outlet can directly be discharged or reuse, otherwise can realize that with the charge ratio of raw material feed liquid and the rotating speed of motor 10 effluent quality is up to standard by regulating molten gas feed liquid 3; When effluent quality is up to standard, determine the Water in oil rate again, reach established standards and then discharge, system stores this operating mode (major parameter is charge ratio, motor 10 rotating speeds of molten gas feed liquid 3 and raw material feed liquid) and is user model; If moisture content is too high in fuel-displaced, the rotating speed of charge ratio by regulating (heightening) molten gas feed liquid and adjusting motor 10 reduces the moisture content in fuel-displaced again; In the control model, the effluent quality control that has precedence over fuel-displaced moisture content up to standard has precedence over adjusting to motor speed to the adjusting of molten gas reduction of feed volume.Flow chart is seen Figure of description 4.
Because feed liquid tangentially enters in the dynamic vortex flow separator 1, thereby the disturbance that produces when having avoided blade to quicken to a certain extent, simultaneously, flow-guiding type is adopted in the design of blade, to produce turning effort, the axial clamp of blade is contended decrescence little of to strengthen axial motive force gradually, has avoided big oil droplet chopping emulsification, under the double action of swirling flow and air supporting principle, guaranteed the mixture separating effect.The swirling flow that automatic monitoring system can be different feed liquid separates the selection operating mode, and guarantees that system is in most economical mode operation, thereby reaches energy saving purposes.
Another using method of the device that air floatation type dynamic vortex flow separates is, after molten gas feed liquid 3 mixes by molten gas feed liquid distributor 4 and charging 2 through valve 5, enter in the dynamic vortex flow separator 1 by charging aperture 7, carrying out air floatation type dynamic vortex flow separates, light material is under swirling flow and pneumatically supported effect, poly-to the separator axle center, in discharging opening 12, increase by a discharging opening 7a, light material is derived, and heavy material through the swirling flow effect of reducing pipe 11 strengthen remove light material after, discharge by discharging opening 12 again, as shown in Figure 3.This system can realize the qualified discharge or the reuse of water outlet by the charge ratio of the molten gas feed liquid of adjusting and the rotating speed of motor 10, and reduces fuel-displaced moisture content, and automatic control process is with above-mentioned, and control flow is seen accompanying drawing 4.The diameter of charging aperture 7a is designated as D4, and D2/D1 is 0.1～0.6, and D4/D1 is 0.1～0.3, and D3/D1 is 0.1～0.6, and L1/D1 is 0.5～3.6, and L2/D1 is 0.3～6.
The invention has the beneficial effects as follows: owing to adopted two kinds of principles of swirling flow and air supporting that mixture is separated, compare, in the energy consumption that reduces operation, improved effluent quality with simple Dynamic Separation device; Adopt the shell rotation mode to produce dynamic vortex flow, thereby improved the efficient of separating greatly.Compare with static swirling flow isolation technics, the treating capacity scope of apparatus of the present invention is big, and peeling strength strengthens, and the inlet liquid supply pressure reduces, and the pressure loss is little.Adopt automatic monitoring system system to control the charge ratio of molten gas feed liquid and rotating speed of motor with the qualified discharge that reaches effluent quality with reduce fuel-displaced moisture content effectively, thereby make the effect of separation have more practicality.This system can drop to oil-containing water below the 10mg/l, has satisfied the requirement of discharge of wastewater.
Description of drawings
Fig. 1 is the structural diagrams (1) of apparatus of the present invention.
Fig. 2 is a dynamic vortex flow separator structural diagrams of the present invention.
Fig. 3 is the structural diagrams (2) of apparatus of the present invention.
The automatic control flow chart figure of Fig. 4 air floatation type dynamic vortex flow system.
Number in the figure: 1 is the dynamic vortex flow separator, and 2 is charging aperture, and 3 is molten gas feed liquid, and 4 is molten gas feed liquid distributor, and 5 is valve, and 6 is feed pipe, and 7 is charging aperture, and 7a is a discharging opening.8 is rotational shell, and 9 is drive disk assembly, and 10 is motor, and 11 is reducing pipe, and 12 is discharging opening, and 13 is pre-rotary vane assembly, and 14 is the on-line monitoring instrument, and 15 is controller.
The specific embodiment
One air floatation type dynamic vortex flow separator, water inlet is D1=55mm with the rotational shell diameter, a=18mm in its charging aperture 6, b=45mm, the diameter D2=15mm of charging aperture 7, the diameter D3=15mm of discharging opening 12, water inlet and rotational shell length L 1=100mm, the length L 2=200mm of reducing pipe 11.Oily waste water oil content 4000ppm, flow is 13.8L/s, carrying out operating mode by automatic control system selects, molten gas feed liquid 3 is 1: 3 with the flow-rate ratio of raw material feed liquid in the selected operating condition, dissolved-air pressure is 0.3Mpa, and the rotating speed 2980rmp of motor 10 is 4～5% o'clock in split ratio, the water outlet oil content is 15.8ppm, has reached deoiling effect preferably.
Claims (5)
1, a kind of device of mixture air floatation type dynamic vortex flow separation is characterized in that, is connected and composed by the road by molten gas feed liquid distributor (4), dynamic vortex flow separator (1), motor (10) and automatic monitoring equipment; Dynamic vortex flow separator (1) is made up of rotational shell (8), pre-rotary vane assembly (13) and reducing pipe (11), pre-rotary vane assembly (13) has two groups, be symmetrically distributed in the rotational shell (8), reducing pipe (11) is arranged at the downside of rotational shell (8), and reducing pipe (11) lower end is provided with discharging opening (12); The top of dynamic vortex flow separator (1) is provided with charging aperture (7), and upper side is provided with feed pipe (6); Motor (10) is connected with dynamic vortex flow separator (1) by drive disk assembly (9), and drives rotational shell (8) rotation.
2, the device that separates according to the said air floatation type dynamic vortex flow of claim 1 is characterized in that the diameter of the rotational shell (8) of dynamic vortex flow separator (1) is designated as D1, and water inlet and rotational shell length are designated as L1; Feed pipe (6) cross section is a rectangle, adopts tangential admission, the length of rectangle and wide a, the b of being designated as respectively; The diameter of charging aperture (7) is designated as D2, and discharging opening (12) diameter is designated as D3; The length of reducing pipe (11) is designated as L2; Wherein, D2/D1 is 0.1～0.6, and D3/D1 is 0.1～0.5, and L1/D1 is 0.5～3.6, and L2/D1 is 0.3～6, and a＞b, ab are 0.02～0.15[π (D1)
2].
3, the device that separates according to the said air floatation type dynamic vortex flow of claim 1, it is characterized in that, two groups of pre-rotary vane assemblies (13) that symmetrical distribution is arranged in rotational shell 8, every group of blade has 1～5, it is streamlined that blade is water droplet, its center line is designated as α 1, α 2 with the angle of central shaft respectively ... α 5,0≤α i≤45 °, i=1,2,3,4,5.
4, the device that separates according to the said air floatation type dynamic vortex flow of claim 1, it is characterized in that, discharging opening (7a) is arranged in discharging opening (12), the diameter of discharging opening (7a) is designated as D4, and wherein, D2/D1 is 0.1～0.6, D4/D1 is 0.1～0.3, D3/D1 is 0.1～0.6, and L1/D1 is 0.5～3.6, and L2/D1 is 0.3～6.
5, the device that separates according to the said air floatation type dynamic vortex flow of claim 1 is characterized in that the automatic monitoring control equipment is connected to form successively by the road by flow valve (5), controller (15) and on-line monitoring instrument (14).
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| CN 200510025503 CN1291792C (en) | 2005-04-28 | 2005-04-28 | Mixture air floatation type dynamic vortex flow separation method and its device |
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| CN 200510025503 CN1291792C (en) | 2005-04-28 | 2005-04-28 | Mixture air floatation type dynamic vortex flow separation method and its device |
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| CN1291792C true CN1291792C (en) | 2006-12-27 |
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| CN102161519A (en) * | 2010-02-19 | 2011-08-24 | 山东海吉雅环保设备有限公司 | Closed eddy current radial gas flotation oil removal method |
| CN102553342B (en) * | 2011-12-07 | 2014-03-26 | 中国石油化工股份有限公司 | Solid-liquid separation device |
| CN104888930A (en) * | 2015-05-05 | 2015-09-09 | 中国矿业大学 | Shunt suspension characteristic adjusting device and method |
| CN107232386A (en) * | 2017-04-19 | 2017-10-10 | 信阳山信生物食品科技有限公司 | A kind of high-purity rice protein preparation technology and equipment |
| CN114682397B (en) * | 2022-03-28 | 2024-03-15 | 浙江大学 | Conical liquid-liquid axial centrifugal separator and separation monitoring device |
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