CN100575269C - A kind of optimization water distribution multiphase flow pump backflow air-floating apparatus - Google Patents

A kind of optimization water distribution multiphase flow pump backflow air-floating apparatus Download PDF

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CN100575269C
CN100575269C CN200710177201A CN200710177201A CN100575269C CN 100575269 C CN100575269 C CN 100575269C CN 200710177201 A CN200710177201 A CN 200710177201A CN 200710177201 A CN200710177201 A CN 200710177201A CN 100575269 C CN100575269 C CN 100575269C
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China
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water
air
floating
chamber
pump
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CN200710177201A
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Chinese (zh)
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CN101182053A (en
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张超
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中国海洋石油总公司
天津化工研究设计院
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Abstract

The present invention relates to a kind of multiphase flow pump backflow dissolved air flotation device, be used for trade effluent and municipal sewage treatment such as oil-containing, papermaking.This device includes intake pump, polyphasic flow air dissolved pump, water inlet eddy flow water distribution head, partly composition such as molten cyclonic current water distribution head, clear water header, slag scraper and dreg collecting slot refluxes.This device has been save equipment such as air compressor machine, dissolving owing to adopted the molten gas of multiphase flow pump and dynamic eddy flow water distribution, have simple in structure, take up an area of less, characteristics such as save energy and removal efficiency height.

Description

A kind of optimization water distribution multiphase flow pump backflow air-floating apparatus
Technical field
The invention belongs to environmental protection technical field, relate to a kind of optimization water distribution multiphase flow pump backflow air-floating apparatus, the method for specifically utilizing multiphase flow pump molten gas backflow optimization water distribution is to remove the waste disposal plant of pollution substance.
Background technology
Raising along with national economy high speed development and people's level of consumption; the quantity discharged of municipal effluent and trade effluent increases year by year; especially in recent years the rate of growth of discharge of major pollutant amount has surpassed the rate of growth of gross national product in the trade effluent; destroyed the balance between growth of the national economic and the ecological environmental protection, made the industrial civilization development be subjected to restriction.High pollution, maximum discharge amount industries such as oil, electric power, iron and steel, printing and dyeing, chemical industry, papermaking, pharmacy, annual to 20,000,000,000 tons of natural water waste discharges, 7,000,000 tons of principal pollutant COD content are if quantity discharged sustainable growth and can not get effective improvement can make physical environment be subjected to severe contamination.Therefore, administer the repeating utilization factor that waste water makes its qualified discharge and improves water, become an important step of society's coordinated development.
To the processing of sewage and trade effluent, method international and domestic common employing mainly contains methods such as physico-chemical process, contact oxidation method, activated sludge process, catalytic oxidation, bio-reactor and membrane sepn.Physico-chemical process is the acting in conjunction of physical equipment fiting chemical medicament, the most normal a kind of using method that sewage is handled.Normally in processed water, add flocculation and help chemical agent with fixed attention, as poly aluminium chloride (PAC), polyacrylamide (PAM) etc.The neutralization of the static of medicament, build bridge cohesion and volume are swept effect, make the suspended substance in the water generate polynuclear coordination compound, bring out the pollution substance that suspends and be dissolved in the water and take off steady formation flock, and in physical equipment sedimentation or come-up.Physical equipment in the materilization freatment method has precipitation and floating last two kinds of forms by deviating from the mode branch.Realize that sedimentary facility or equipment are mainly the settling tank of various structures; And the major equipment of realizing come-up is air flotation pool or air-floating apparatus.
Air flotation technology is one of sewage disposal technology that is widely used gradually in recent years.Its principle is, pass through proper method, in processed water, produce the micro-bubble of a large amount of diameters at the 10-200 micron, gas ducks in drink in diffusion and the floating-upward process, adhere to the impurity particle that under the medicament effect, flocculates in the water, removed after floating to the water surface on the flco of formation proportion less than water, reached the purpose that removes impurity in the water.Use the air-floating apparatus that air flotation technology makes in recent years and mainly contain various ways such as pressurized dissolved air flotation, cavitation air flotation, shallow air-floatation.Mainly include several sections such as air compressor machine, dissolving, recycle pump, reliever in the pressurized dissolved air flotation system, its principle of work is, the clear water of a part being handled by recycle pump (being called recirculation water) is incorporated into dissolving, in dissolving, feed pressurized air with air compressor machine and be pressurized to 0.3-0.4Mpa, the solubleness of air in recirculation water increases and becomes dissolved air water under the effect of pressure, by reliever the dissolved air water decompression is discharged again, mixed with the sewage that needs are handled.Because the reduction of dissolved air water pressure, the air that is dissolved in the water is separated out, and forms micro-bubble and rises.The characteristics of air-dissolving air-float are the solubleness height that pressurization makes air in the water, and the bubble of generation is even, fine and closely woven, particle diameter little (10-50 μ m), suspended substance decreasing ratio height.But owing to need to use the air compressor machine supercharging, Energy Efficiency Ratio is low, and the pressure in the dissolving also makes the reflux pump watt consumption increase.Reliever in the existing technology pressurized dissolved air flotation system has a variety of forms, but all must have reliever, and long-time running is easy to cause water-in to stop up.Pressurized dissolved air flotation exists also simultaneously that equipment is many, complicated operation and the big shortcoming of maintenance; Cavitation air flotation is also cited approvingly gas air supporting, compares with pressurized dissolved air flotation, has saved air compressor machine and dissolving and makes and take up an area of and the energy consumption reduction.As the air supporting machine that proposes respectively in the Chinese patent 99247467.1,03114675.9, be by tubular shaft by motor as air entraining pipe, drive the diffusing gas disk of the many apertures of side uniform distribution, the disk lower end is coaxial fixes a turbine, the negative pressure introducing air that the centre produces when utilizing the turbine rotation, and turbine bubble that the shearing of water and stirring action are produced, the aperture by the gas disk edge that looses mixes bubble and water.Air flotation turbo is simple in structure, consumed power is little, so facility investment is relative with running cost less.But because this method is not to supercharging air, the dissolved efficiency of air in water is low, and the negative pressure at the vortes interference air entraining pipe place that forms of turbine rotation, turbine is big, unstable to the bubble diameter that the shearing and the stirring action of water produces, and the effect of disposing of sewage is not ideal enough; Disclosed a kind of shallow air-floatation device in the Chinese patent 95208688.3 is a kind of circular channels structure.Its water-in, water outlet and slagging-off mechanism all are arranged on one on the cantilever of circular air flotation slot rotation, and the dosing dissolved air water by the air compressor machine supercharging enters air flotation slot through the water distributor of water-in.Adjust the rotating speed of cantilever, the relative velocity that can make water inlet makes flco floating upward quickly slagging under undisturbed environment of coagulation in the sewage for very low.Shallow air-floatation is owing to utilized water inlet zero flow velocity principle, the hydraulic detention time that the flco come-up only needs 5-10 minute, air flotation slot can be done very shallowly, therefore have the advantages that floor space is few, removal efficiency is high, water outlet is good, but also exist complex structure, facility investment is big, consumed power is many and running cost is high deficiency.
Summary of the invention
The present invention is based on the deficiency that exists in the existing air flotation technology, a kind of optimization water distribution multiphase flow pump backflow air-floating apparatus is provided.Especially adopted multiphase flow pump reflux molten gas and eddy flow water distribution head, made the bubble abundance of generation fine and closely woven, evenly mixed, and have simple in structure, cost is low, little power consumption, do not stop up non-maintaining characteristics.
The present invention also improves the air flotation slot structure on the basis of existing technology, and air flotation slot is divided into gas-floating chamber, collecting chamber and clean water chamber with water conservancy diversion version and dividing plate, and scum silica frost scrapes by the slag scraper adverse current.Clear water is incorporated into clean water chamber by header, avoids scum silica frost or sediment are brought into clean water chamber, and effluent characteristics significantly improves.
The air-floating apparatus that the present invention relates to mainly partly is made up of air flotation slot, intake pump, polyphasic flow air dissolved pump, water inlet eddy flow water distribution head, reflux molten cyclonic current water distribution head, header and slag scraper etc.
Multiphase flow pump is a kind of pump that can carry the special construction that contains gas, solid, the heterogeneous mixed flow medium of liquid, and multi-stage impeller is arranged.The import of pump and impeller inlet form S shape runner, and in pump inlet place a check valve are arranged, and always keep in the pump housing certain amount of fluid abrim.During the impeller high speed rotating, form higher vacuum at the impeller inlet place.Pump utilizes vacuum that air is sucked when sending water and is fully mixed with water.The multi-stage impeller of high speed rotating will be inhaled people's empty G﹠W supercharging, shearing, generate tiny bubble, empty G﹠W is except that along direction blade flows, also can be from the gap radially and axially become turbulent flows, bubble is produced extruding, bump, make bubble and full and uniformization of water.The bubble that multiphase flow pump produces is fine and closely woven, even, and the grain warp is less than 30 μ m, and air content can reach 30% in the dissolved air water, and molten tolerance can be regulated easily by the valve that is provided with on the air inlet duct.Multiphase flow pump is the commercial goods, and the more and excellent performance that external product uses is as the Ni Keni (NIKUNI) of Japan and Edu that (EDUR) product of Germany.
Influence another major cause of air supporting treatment effect, be that also dissolved air water and processed water can not full and uniformly mix.The present invention has used the eddy flow water distribution head at backflow dissolved air water and the design of sewage inlet place, and its structure as shown in Figures 2 and 3.Water distribution head is a plate-like hollow shell, and in the upper surface diametric(al), a plurality of calibers of uniform distribution are the water distributor of 15-25mm from outside to inside.Water distributor divides 3 groups of different height, every group of water distributor serpentine bend, and water outlet direction and water distribution head horizontal tangential angle are the 10-30 degree, make that water outlet is at many levels, the multi-angle rotational flow.Backflow water distribution head direction is intake water distribution head towards installation with the sewage of going up certainly down, and is maintained a certain distance from down up.Two bursts of flow reversal rotational flows make dissolved air water fully contact mixed with processed water.Under the effect of the fine and closely woven bubble of dissolved air water that rotation is risen, the flco in the water is scraped by slag scraper by the surface of supporting to device, reaches the good treatment effect.Because water distribution head rising pipe caliber is thick and do not have the dead angle, can not stop up in the operational process, can realize non-maintaining.
Another characteristics of air-floating apparatus of the present invention are the parts with the backflow dissolved air water, are incorporated into sewage intake pump water-in flocculation agent dosing mouth downstream before by a bypass duct and a regulated valve, play the mixed stirring action to flocculation agent.Because the add-on of flocculation agent is at the ten thousand/following order of magnitude, mobile dosing can not make medicament and water full and uniform mixed.Feed the flow state that a spot of dissolved air water can prolong the duration of contact of medicament and sewage and change water, improve the chemicals treatment effect.For general centrifugal water pump, there is too much air that cavitation erosion and cutout can take place in the water, influence pumping efficiency.So by regulated valve, the feeding amount that makes recirculation water is less than 3% of total flux.
The recirculation water of air-floating apparatus of the present invention is drawn by water pipe at clean water chamber and gas-floating chamber bottom.Operation for a long time can to the gas-floating chamber direction, have the pitch angle of 3-5 degree in this device air flotation slot base plane at some impurity of air flotation slot bottom deposit.The sedimentary impurity of collecting chamber and gas-floating chamber can be piled up to the gas-floating chamber bottom.Draw recirculation water from clean water chamber bottom, can make sediment in the water through the shearing of multiphase flow pump, fragmentation after refinement and proportion alleviates more, can become scum silica frost after handling again and discharge.The impurity sediment of gas-floating chamber bottom, through the control of the valve on the outlet at bottom pipeline, the molten gas recirculation water of drawing with clean water chamber is mixed according to a certain percentage to turn back to gas-floating chamber, has saved the blowdown of air flotation slot bottom, thereby has simplified schedule of operation.
In the prior art, especially the air-flotation reactor of the air flotation slot of pressurized dissolved air flotation and cavitation air flotation and clean water chamber generally are indiscrete, and the clear water after the processing is from the overfall of gas-floating chamber upper end or the bottom of gas-floating chamber baffle plate enters clean water chamber.The drawback of this structure is that scum silica frost or sediment are taken out of with clear water easily, makes the effluent quality of handling bad.The present invention improves existing technology, and air flotation slot is divided for three functional compartments, gas-floating chamber, collecting chamber and clean water chamber.Collecting chamber and clean water chamber separate fully with dividing plate, the header connected set hydroecium and the clean water chamber that are DN50-100 with a caliber in the middle part of dividing plate.The header top is not sealed, and the downward-sloping 5-10 of top level °, can make impurity discharge downwards and not enter clean water chamber, it processes a plurality of gully-holes to the lower section, is incorporated in the clean water chamber by the water of gully-hole with the collecting chamber middle part.Weld support bar above the header, support a splash pan that has radian and block the scum silica frost that moves downward, avoid scum silica frost or sediment to be brought into clean water chamber, effluent characteristics is obviously improved.
The present invention also improves the dreg scraper on the slag scraper.135 ° of angles of folding, rectangle dreg scraper middle part make it become two parts, a square hole is opened in the Lower Half middle part, inlay by screen frame on the square hole and fix one 40 purpose Stainless Steel Cloth, its objective is that scraping filter allows water pass through scum silica frost the time, when avoiding dreg scraper to move against the current the disturbance of gathering scum silica frost made that scum silica frost is broken to sink.
The present invention is a kind of optimization water distribution multiphase flow pump backflow air-floating apparatus, it is characterized in that: complete assembly is made up of air flotation slot 1, intake pump 2, polyphasic flow air dissolved pump 3, water inlet eddy flow water distribution head 4, reflux molten cyclonic current water distribution head 5, header 6 and slag scraper 7; Intake pump 2 connects water inlet eddy flow water distribution head 4 by pipeline, and processed waste water is squeezed in the air flotation slot 1; Polyphasic flow air dissolved pump 3 is from the clean water chamber drawing-off water of air flotation slot 1, and becomes dissolved air water after dissolving into air; Connect by pipeline, the molten cyclonic current water distribution head 5 of part process backflow enters the gas-floating chamber of air flotation slot, and another part is got back to the water-in of intake pump; Dissolved air water forms micro-bubble through eddy flow water distribution head rotation water distribution uniformity in the gas-floating chamber decompression, and the suspended matter of entrusting in the waste water floats to the air flotation slot the superiors water surface, is scraped by slag scraper 7; Header 6 is discharged after the cleaning water in the middle part of the air flotation slot collecting chamber is incorporated into clean water chamber.
Dosing mouth 31 on the sewage water inlet pipe road of this device and 32 places add flocculation agent and coagulant aids, from the dissolved air water that gas-floating chamber 12 bottom eddy flows enter the pollution medium supporting of flocculation are discharged to the scum silica frost district.
This air-floating apparatus, it further is characterized as, and water conservancy diversion version 18 and dividing plate 16 are divided into gas-floating chamber 12, collecting chamber 17 and clean water chamber 13 with air flotation slot 1, by header 6 clear water are incorporated into clean water chamber, discharge through rising pipe 14 again.
This air-floating apparatus, it further is characterized as, and the part clear water that multiphase flow pump 3 will be handled dissolves in the water-in that turns back to gas-floating chamber and sump pump 2 behind the air, and reflux ratio is 20%-30%.
The described water distribution head 4 of apparatus of the present invention and 5, it further is characterized as, water distribution head upper surface diametric(al) is a plurality of water distributors 402 of uniform distribution from outside to inside, and water distributor is divided into 3 groups of different height, and every group of water distributor water outlet direction and water distribution head horizontal tangential angle are 10 °-30 °.
The described header 6 of apparatus of the present invention, it further is characterized as, and the surface that the body 601 of catchmenting is downward processes a plurality of gully-holes 602, and the splash pan 604 that has radian is weldingly fixed on the body that catchments by support bar 603.
The described header 6 of apparatus of the present invention, it further is characterized as, and the body 601 that catchments passes dividing plate 16 by clear water rising pipe 61 collecting chamber 17 is communicated with clean water chamber 13, and the header top is not sealed, the horizontal downtilt angles 5-10 in top °.
The described slag scraper 7 of apparatus of the present invention, it further is characterized as, and a plurality of dreg scraper 71 uniform distribution hang on the slag scraper Chain plate by hangers 713, and hangers backstop location is no more than 90 ° with Chain plate direction of forward movement activity point of view.
The described dreg scraper 71 of apparatus of the present invention, it further is characterized as, 135 ° of angles of folding, plate body middle part, a square hole is opened in the Lower Half middle part, fixes 40 order Stainless Steel Cloths 711 by screen frame 712 on the square hole.
The described dreg scraper 71 of apparatus of the present invention, it further is characterized as, and material is the thick stainless steel plate of 2mm.
Description of drawings
Fig. 1 is a kind of structural representation of optimizing water distribution multiphase flow pump backflow air-floating apparatus of the present invention:
Wherein, 1-air flotation slot; The 2-intake pump; 3-polyphasic flow backflow air dissolved pump; 4-water inlet eddy flow water distribution head; 5-backflow eddy flow water distribution head; The 6-header; The 7-slag scraper; 11-scum silica frost groove; The 12-gas-floating chamber; The 13-clean water chamber; The 14-rising pipe; The 15-support; The 16-dividing plate; The 17-collecting chamber; 18-water conservancy diversion version; The 21-sewage inlet; The 22-inlet channel; 23-dissolved air water pipeline; 24-sediment rising pipe; 25-dissolved air water arm; 26-dissolved air water water inlet pipe; 31-flocculation agent dosing mouth; 32-coagulant aids dosing mouth; 33-air intake; 41-recirculation water regulated valve; 42-sediment water outlet regulated valve; 43-dissolved air water branch road regulated valve; 44-artificial atmosphere valve; 61-clear water rising pipe; The 71-dreg scraper; 81-flooding velocity meter; 82-refluxes and shunts water ga(u)ge; 83-recirculation water flow meter.
Fig. 2 is an eddy flow water distribution head structural representation
Wherein, 401-water distribution head water-in; The 402-water distributor.
Fig. 3 is an eddy flow water distribution head top view
Fig. 4 is header combination synoptic diagram
Wherein, the 601-body that catchments; The 602-gully-hole; The 603-support bar; The 604-splash pan.
Fig. 5 is dreg scraper combination synoptic diagram
Wherein, 711-Stainless Steel Cloth; The 712-screen frame; The 713-hangers.
Embodiment
Embodiment 1
Below in conjunction with accompanying drawing, the embodiment of apparatus of the present invention is specifically described.
As shown in Figure 1, the sewage or waste water of need handling is through the pumping of intake pump 2, enters into the gas-floating chamber 12 of air flotation slot 1 from sewage inlet 21 and inlet channel 22.Before the pump of inlet channel, be provided with flocculation agent dosing mouth 31, press doses and add flocculation agent poly aluminium chloride (PAC) and behind pump, be provided with coagulant aids dosing mouth 32, press doses and add coagulant aids polyacrylamide (PAM) near air flotation slot ingress.Two kinds of medicaments do not add at the same snack made with traditional Chinese medicines that adds, and are best because add the coagulant aids effect again behind the flocculation reaction certain hour.When going back underfilling water in the first operation air flotation slot, after water enters gas-floating chamber from water inlet eddy flow water distribution head 4, through gas-floating chamber 12 bottoms-and collecting chamber 17-header 6, enter clean water chamber 13.Open recirculation water regulated valve 41 behind the clean water chamber collection full water and start polyphasic flow backflow air dissolved pump 3 and regulate artificial atmosphere valve 44 to correct position.The molten gas recirculation water that the backflow air dissolved pump produces enters into gas-floating chamber through dissolved air water pipeline 23, dissolved air water water inlet pipe 26 and backflow eddy flow water distribution head 5.The water pushing pressure of intake pump is not less than 0.3Mpa, the reflux pump water pushing pressure is not less than 0.4Mpa, under the water pushing pressure effect, the water that ejects from intake water distribution head and backflow water distribution head is multi-level rotational flow, and two water distribution heads are towards installation, retrograde rotation water outlet, and making into, water fully contacts mixed with dissolved air water.Two water distribution head structures are identical, as shown in Figures 2 and 3.Adjust recirculation water regulated valve 41 and artificial atmosphere valve 44 repeatedly, make the gas-floating chamber surface produce the vaporific fine and closely woven bubble water of white and the scum silica frost emersion is arranged, reach the optimum handling effect.Because backflow dissolved air water pressure is greater than intake pressure, and then guaranteed that the flocs unit in the bubble adhesion water in the dissolved air water moves to the gas-floating chamber surface.
Under the guide effect of curved shape flow deflector 18, flocs unit forms scum silica frost and floats to the gas-floating chamber surface, and the treating water that removes behind the scum silica frost flows to collecting chamber 17 from the bottom of gas-floating chamber water conservancy diversion version, water is further clarified in collecting chamber, remaining suspended substance is deposited to the bottom, clear water then is drawn out to clean water chamber 13 by the header 16 that is located at the collecting chamber middle part, and effluxes or reuse through rising pipe 14.The header structure as shown in Figure 4; The oblique angle that dips down of 3-5 degree is arranged to the gas-floating chamber direction at the collecting chamber bottom, sedimentary sediment is mixed by sediment rising pipe 24 and molten gas recirculation water, make sediment reflow treatment again, sediment water outlet regulated valve 42 can be opened at interval, also can adjust certain aperture and discharge continuously.
On the outlet of water-in, multiphase flow pump 3 and dissolved air water arm 25, under meter 81,83 and 82 is housed respectively, in order to adjust flow and reflux ratio.Regulate dissolved air water branch road regulated valve 43, make the part of molten gas recirculation water turn back to suction culvert, the medicament that adds is mixed stirring, dissolved air water feeding amount is less than 3% of total flux.
Slag scraper 7 flow path direction level against the current scrapes the scum silica frost on gas-floating chamber surface in the scum silica frost groove 11, and there is a slag notch scum silica frost groove side, and the bottom is smooth and to the slag notch direction angle of inclination about 10 ° is arranged, and the scum silica frost of accumulation is discharged from slag notch by gravity.Dreg scraper 71 structures as shown in Figure 5, stainless steel plate is in 135 ° of left and right sides angles of middle part folding, top hangers 713 hangs on the slag scraper chain gear plate.Hangers also plays movable backstop action, when dreg scraper operates in operation interval, under the drag effect of water and scum silica frost, makes the bottom of dreg scraper and the water surface at an angle of 90; A square hole is opened in the dreg scraper bottom, with screen frame 712 one 40 purpose Stainless Steel Cloth is inlayed to be fixed on the dreg scraper, and its effect is that water is passed through, and reduces running resistance and to the disturbance of scum silica frost.
Embodiment 2
Utilize the device with example 1 provided by the invention that a kind of oily(waste)water is handled, its water quality and quantity is: oleaginousness 153mg/L, COD Cr786mg/L, the about 1200m of continuous treating water every day 3(50m 3/ h).Additive amount of medicament PAC40mg/L, PAM2mg/L adds continuously.Reflux ratio is adjusted into 25%, and the water quality after the processing is oleaginousness 5.5mg/L, COD Cr43mg/L, decreasing ratio reach de-oiling rate 96.4% and COD decreasing ratio 94.5% respectively.
Embodiment 3
Utilize the device with example 1 provided by the invention that the plain boiled water that one family produces the papermaking enterprise of 5000 tons of toilet papers per year is handled, its water quality and quantity is: COD Cr650mg/L, SS (suspended substance) 485mg/L, the about 1800m of continuous treating water every day 3(75m 3/ h).Additive amount of medicament PAC60mg/L, PAM 1mg/L adds continuously.Reflux ratio is adjusted into 20%, handles the index COD of back water Cr54.5mg/L, SS46mg/L, COD decreasing ratio 91.6%, suspended substance decreasing ratio 90.5%, water outlet reaches national grade one discharge standard.

Claims (9)

1. optimize water distribution multiphase flow pump backflow air-floating apparatus for one kind, it is characterized in that: apparatus main body is made up of air flotation slot (1), intake pump (2), polyphasic flow air dissolved pump (3), water inlet eddy flow water distribution head (4), reflux molten cyclonic current water distribution head (5), header (6) and several parts of slag scraper (7); Intake pump (2) connects water inlet eddy flow water distribution head (4) by pipeline, and processed waste water is squeezed in the air flotation slot (1); Polyphasic flow air dissolved pump (3) is from the clean water chamber drawing-off water of air flotation slot (1), and becomes dissolved air water after dissolving into air; Connect by pipeline, the part process molten cyclonic current water distribution head of backflow (5) of dissolved air water enters the gas-floating chamber of air flotation slot, and another part is got back to the water-in of intake pump; Dissolved air water forms micro-bubble through the molten cyclonic current water distribution head rotation water distribution uniformity that refluxes in the gas-floating chamber decompression, and the suspended matter of entrusting in the waste water floats to the air flotation slot the superiors water surface, is scraped by slag scraper (7); Header (6) is discharged after the cleaning water in the middle part of the air flotation slot collecting chamber is incorporated into clean water chamber.
2. air-floating apparatus as claimed in claim 1, it further is characterized as, flow deflector (18) and dividing plate (16) are divided into gas-floating chamber (12), collecting chamber (17) and clean water chamber (13) with air flotation slot (1), by header (6) clear water are incorporated into clean water chamber, pass through rising pipe (14) again and discharge.
3. air-floating apparatus as claimed in claim 1, it further is characterized as, and the part clear water that polyphasic flow air dissolved pump (3) will be handled dissolves in the water-in that turns back to gas-floating chamber and intake pump (2) behind the air, and reflux ratio is 20%-30%.
4. air-floating apparatus as claimed in claim 1, it is characterized in that described water inlet eddy flow water distribution head (4) and reflux molten cyclonic current water distribution head (5) the upper surface diametric(al) a plurality of water distributors of uniform distribution (402) from outside to inside, water distributor is divided into 3 groups of different height, and every group of water distributor water outlet direction and water distribution head horizontal tangential angle are 10 °-30 °.
5. air-floating apparatus as claimed in claim 1, the downward surface working of the body that catchments (601) that it is characterized in that described header (6) goes out a plurality of gully-holes (602), and the splash pan (604) that has radian is weldingly fixed on the body that catchments by support bar (603).
6. as claim 1 or 5 described air-floating apparatus, the body that catchments (601) that it is characterized in that described header (6) passes dividing plate (16) by clear water rising pipe (61) collecting chamber (17) is communicated with clean water chamber (13), the header top is not sealed, the horizontal downtilt angles 5-10 in top °.
7. air-floating apparatus as claimed in claim 1, a plurality of dreg scrapers (71) uniform distribution that it is characterized in that described slag scraper (7), dreg scraper (71) hangs on the slag scraper Chain plate by hangers (713), and hangers backstop location is no more than 90 ° with Chain plate direction of forward movement activity point of view.
8. air-floating apparatus as claimed in claim 7 is characterized in that 135 ° of angles are rolled in the plate body middle part of described dreg scraper (71), and a square hole is opened in the Lower Half middle part, fixes 40 order Stainless Steel Cloths (711) by screen frame (712) on the square hole.
9. as claim 7 or 8 described air-floating apparatus, it is characterized in that described dreg scraper (71) material is the thick stainless steel plate of 2mm.
CN200710177201A 2007-11-12 2007-11-12 A kind of optimization water distribution multiphase flow pump backflow air-floating apparatus CN100575269C (en)

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CN103739155B (en) * 2013-12-19 2015-08-05 江苏北辰环境科技有限公司 A kind of air-floating apparatus
CN104944631A (en) * 2015-06-03 2015-09-30 安徽新天环保科技有限公司 Pretreatment method of high-concentration cutting fluid sewage
CN105384208B (en) * 2015-11-24 2018-03-09 佛山高富中石油燃料沥青有限责任公司 A kind of sewage air-flotation device for exempting from release
CN107522247A (en) * 2017-10-25 2017-12-29 安徽华创环保设备科技有限公司 A kind of air floatation machine for being easy to remove contamination
CN108946854A (en) * 2018-08-03 2018-12-07 广东金碧蓝环境科技有限公司 A kind of horizontal air-float device based on ultra-fine bubble generator

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