CN102583617B - Isolation type multiphase balanced air floatation device - Google Patents

Isolation type multiphase balanced air floatation device Download PDF

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Publication number
CN102583617B
CN102583617B CN201210072393.8A CN201210072393A CN102583617B CN 102583617 B CN102583617 B CN 102583617B CN 201210072393 A CN201210072393 A CN 201210072393A CN 102583617 B CN102583617 B CN 102583617B
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air
slag
chamber
gas
air floatation
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CN102583617A (en
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荆建波
张继荣
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Nanjing Zhong Yuan Yuan Environmental Protection Technology Co., Ltd.
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NANJING ZHONGHENGYUAN ENVIRONMENTAL PROTECTION EQUIPMENT CO Ltd
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Abstract

The invention discloses an isolation type multiphase balanced air floatation device, which comprises an air floatation chamber, and a multiphase dissolution air pump and a slag scrapping device. The slag scrapping device is arranged on top of the air floatation chamber. The isolation type multiphase balanced air floatation device also comprises an isolation hood. The slag scrapping device includes a transmission gear, a transmission chain and a scrapper blade. A first lower baffle, an upper baffle and a second baffle are arranged in the air floatation chamber in order. The isolation type multiphase balanced air floatation device also comprises a slag scrapping oblique bank. When the scrapper plate moves to the up side of the slag scrapping oblique bank, the scrapper plate can be contacted with a lowest position of an oblique surface of the slag scrapping oblique bank. The slag scrapping oblique bank is fixed on the upper baffle. A long strip shaped groove is arranged between the up side of the slag scrapping oblique bank and the upper baffle. The isolation type multiphase balanced air floatation device also comprises a bleed air whirl generator. The isolation type multiphase balanced air floatation device adopts full-closing type air floatation, and adds a tail gas absorption and treatment system. Tail gas is processed by the bleed air whirl generator and discharged. The isolation type multiphase balanced air floatation device is simple in structure and very easy to operate and maintain, thereby being best choice for industrial and municipal administration treatment. Compared with other traditional air floatation technology, the isolation type multiphase balanced air floatation device is suitable for sewage containing volatile poisonous and harmful gas.

Description

Isolation type multiphase balanced air floatation device
Technical field
The invention belongs to physical method for separation field, relate in particular to a kind of isolation type multiphase balanced air floatation device.
Background technology
Air supporting is to utilize the micro-bubble of high dispersing for carrier removes to adhere to the pollutent in waste water, makes its density be less than water and float to the water surface, thus the water treatment method of Separation of Water and suspended substance.Also make tensio-active agent in water be attached to bubble surface floating, thus separated with water, be called foam By Bubble-floating Method.The equipment that By Bubble-floating Method is used, has comprised the air flotation pool of sepn process and the auxiliary facility of generation bubble.In water treatment, By Bubble-floating Method can be used for the inapplicable occasion of the precipitator method, and with separated proportion, close to water and the suspended substance that is difficult to precipitation, such as grease, fiber, algae etc., also can be in order to concentrated active sludge.
Principle: there is dividing of hydrophilic and hydrophobic on suspended substance surface.The easy bubbles attached of hydrophobic nature particle surface, thereby available By Bubble-floating Method.Hydrophilic particle can transfer hydrophobic nature to after processing with suitable pharmaceutical chemicals.By Bubble-floating Method in water treatment, conventional coagulating agent is formed for flco colloidal solid, and flco has network structure, easy voids, thus improve daf efficiency.Moreover, in water, if any tensio-active agent (as washing composition), can form foam, also there is the effect that suspended particle rises together of adhering to.
Bubble formation method: produce the method for microbubble, conventional have two kinds of aeration By Bubble-floating Method and dissolved air flotations.Also have in addition electrolytic process, but be of little use.
Electrolytic process: electrolytic process is to pass into the direct current of 5~10V in sewage, thus micro-bubble produced, but due to the easy fouling of power consumption large electrode plate, so be mainly used in the Industrial Wastewater Treatment of middle and small scale.
Aeration By Bubble-floating Method: aeration By Bubble-floating Method claims again dispersion air method, is, in the bottom of air flotation pool, micropore diffuser plate or diffuser tube are set, and pressurized air slave plate face or pipe face are overflowed in water with micro-bubble form.Also have impeller is installed in bottom, pond, wheel shaft is perpendicular to the water surface, and pressurized air leads to impeller below, and the stirring action while borrowing impeller high speed rotating, is cut into small bubbles by air pocket.
Dissolved air flotation: be dissolved in the gas in water, just can overflow from water when water surface air pressure reduces.There are two kinds of methods: 1. make the space on air flotation pool be for vacuum state, be in after water under normal pressure flows to pond and disengage microbubble, claim vacuum air soluble method; 2. air pressurized is dissolved in water and is reached capacity, and the decompression of dissolved air water stream disengages microbubble while entering air flotation pool, claims pressure air-dissolving method.The latter is comparatively conventional.Pressure air-dissolving water can be all or part of of processed water, can be also the recirculation water of air flotation pool water outlet, and the per-cent that the backflow water yield accounts for the processed water yield claims reflux ratio, is the important factor that affects daf efficiency, must be determined by test.The equipment of pressure air-dissolving method has force (forcing) pump, dissolving and air compressor etc.Dissolving is pressure-bearing steel cylinder, inner standing flow deflector or the placement filler put.Dissolving water outlet enters air flotation pool by reducing valve or reliever.
No matter above-mentioned each prior art is that solid-liquid separation or liquid liquid are separated, all can produces tail gas, but but can not accomplish, by the tail gas isolation after separation, more toxic and harmful in the tail gas after separation effectively can not be absorbed; On the contrary, tail gas can spill into air, and especially when workman is near air-floating apparatus, or when air-floating apparatus is overhauled, the toxic and harmful in tail gas will endanger health of human body.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned the deficiencies in the prior art, provides a kind of and tail gas can be isolated, handled easily and maintenance simultaneously also can not endanger the isolation type multiphase balanced air floatation device of health of human body
For solving the problems of the technologies described above, the technical scheme that the present invention takes is: a kind of isolation type multiphase balanced air floatation device, comprises gas-floating chamber, heterogeneous air dissolved pump and the slag scraper for pollutent is removed from water; Described gas-floating chamber one end is provided with waste water import and dissolved air water entrance, and the other end is provided with clear water output and recirculation water outlet; The water-in of heterogeneous air dissolved pump is communicated with recirculation water outlet by pipeline, and the water outlet of heterogeneous air dissolved pump is communicated with dissolved air water entrance; Described slag scraper is arranged on gas-floating chamber top; Also comprise cage, described cage is arranged on gas-floating chamber top and is tightly connected with gas-floating chamber, and the cavity between cage and gas-floating chamber is insulated chamber, and described slag scraper is positioned at insulated chamber; At least one end face of described cage is provided with for the import and export of slag scraper turnover with for importing and exporting the movable end plate of sealing; Described slag scraper comprises transmitting gear, driving chain and scraper plate; Described scraper plate is arranged on driving chain, and transmitting gear drives driving chain to-and-fro movement, and driving chain drives scraper plate cyclic motion; In described gas-floating chamber, be provided with successively the first lower baffle plate, overhead gage and the second lower baffle plate, exposure chamber, separate chamber, rising area and exhalant region will be divided in gas-floating chamber, exposure chamber and separate chamber are suitable for reading to communicate, and separate chamber and rising area end opening communicate, and rising area and exhalant region are suitable for reading to communicate; Also comprise and scrape the oblique bank of slag, when scraper plate moves to, scrape slag oblique when side on the bank, described scraper plate can contact with the lowest part of scraping the scarp of the oblique bank of slag; The described oblique bank of slag of scraping is fixedly mounted on overhead gage, described in scrape slag and tiltedly between portion and overhead gage, be provided with long strip shape groove on the bank, when scraper plate moves to long strip shape groove, waste residue is just in time pushed in long strip shape groove by scraper plate; Described scraper plate is elastic caoutchouc scraping blade; Also comprise for the tail gas in insulated chamber is drawn simultaneously the toxic and harmful of tail gas is removed bleed rotational flow generator.
As further improved technical scheme of the present invention, as further improved technical scheme of the present invention, described bleed rotational flow generator comprises tourie 16-4 and motor 16-1, the transmission shaft 16-2, the screw-blade 16-3 that are fixedly connected sequentially; Tourie 16-4 top is provided with gas discharge outlet 16-5; Described motor 16-1 drives transmission shaft 16-2 rotation, transmission shaft 16-2 drives screw-blade 16-3 rotation, and transmission shaft 16-2 stretches in tourie 16-4, in described transmission shaft 16-2, is provided with axial cavity, described axial cavity top is connected with insulated chamber 11, and the bottom of axial cavity is port; When screw-blade 16-3 rotates, above screw-blade 16-3, form negative pressure.
As further improved technical scheme of the present invention, between the water outlet of heterogeneous air dissolved pump and dissolved air water entrance, be also in series with equalizer; Described equalizer comprises balanced cover and is positioned at the corrugated deflector of balanced cover.
As further improved technical scheme of the present invention, be also provided with the first tensimeter for detection of equalizer internal pressure, and for detection of the second tensimeter of recirculation water pressure; On the air line being connected with the gas inlet of heterogeneous air dissolved pump, the air flowmeter for detection of the air flow quantity in air line is also installed.
The present invention produces dissolved air water by heterogeneous air dissolved pump, dissolved air water discharges at gas-floating chamber, the I of these bubble diameters that discharge reaches nano level, the microbubbles a large amount of at gas-floating chamber contact with pollutent such as oils, fat, suspended substance in water, and pollutent is adsorbed on above bubble, along with bubble rising, pollutent is taken to the water surface, and by slag scraper, pollutent is removed from water.
The present invention adopts total closed type air supporting, and has increased tail gas absorption treatment system, after tail gas is collected by insulated chamber, and discharge after bleed rotational flow generator is processed.Internal structure of the present invention is simple, and Operation and maintenance are very easy to, and is the optimal selection that industry and municipal wastewater are processed.In addition, other traditional air flotation technology, more can be applicable to the sewage containing volatility toxic and harmful relatively.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is slag scraper structural representation of the present invention.
Fig. 3 is equaliser structure schematic diagram of the present invention.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
Embodiment
Referring to Fig. 1, Fig. 2 and Fig. 3, this isolation type multiphase balanced air floatation device, comprises gas-floating chamber 1, heterogeneous air dissolved pump 2 and the slag scraper 3 for pollutent is removed from water; Described gas-floating chamber 1 one end is provided with waste water import 4 and dissolved air water entrance 5, and the other end is provided with clear water output 6 and recirculation water outlet 7; The water-in 8 of heterogeneous air dissolved pump 2 is communicated with recirculation water outlet 7 by pipeline, and the water outlet 9 of heterogeneous air dissolved pump 2 is communicated with dissolved air water entrance 5; Described slag scraper 3 is arranged on gas-floating chamber 1 top; It is characterized in that: also comprise cage 10, described cage 10 is arranged on gas-floating chamber 1 top and is tightly connected with gas-floating chamber 1, and the cavity between cage 10 and gas-floating chamber is insulated chamber 11, and described slag scraper 3 is positioned at insulated chamber 11; At least one end face of described cage 10 is provided with for the import and export 12 of slag scraper 3 turnover with for importing and exporting the movable end plate 13 of 12 sealings.The present invention produces dissolved air water by heterogeneous air dissolved pump, dissolved air water discharges at gas-floating chamber, the I of these bubble diameters that discharge reaches nano level, the microbubbles a large amount of at gas-floating chamber contact with pollutent such as oils, fat, suspended substance in water, and pollutent is adsorbed on above bubble, along with bubble rising, pollutent is taken to the water surface, and by slag scraper, pollutent is removed from water.
Described slag scraper 3 comprises transmitting gear 3-1, driving chain 3-2 and scraper plate 3-3; It is upper that described scraper plate 3-3 is arranged on driving chain 3-2, and transmitting gear 3-1 drives driving chain 3-2 to-and-fro movement, and driving chain 3-2 drives scraper plate 3-3 cyclic motion.
In described gas-floating chamber 1, be provided with successively the first lower baffle plate 1-1, overhead gage 1-2 and the second lower baffle plate 1-3,1-6He exhalant region, 1-5, rising area, 1-4, separate chamber, exposure chamber 1-7 will be divided in gas-floating chamber 1, suitable for reading the communicating of the 1-5 of 1-4He separate chamber, exposure chamber, 1-5He rising area, separate chamber 1-6 end opening communicates, suitable for reading the communicating of 1-6He exhalant region, rising area 1-7.Heterogeneous air dissolved pump produces dissolved air water, dissolved air water discharges at gas-floating chamber, the I of these bubble diameters that discharge reaches nano level, the microbubbles a large amount of at gas-floating chamber contact with pollutent such as oils, fat, suspended substance in water, and pollutent is adsorbed on above bubble, along with bubble rising, pollutent is taken to the water surface, and by slag scraper, pollutent is removed from water
Also comprise and scrape the oblique bank 14 of slag, when scraper plate 3-3 moves to while scraping the oblique bank of slag 14 top, described scraper plate 3-3 can contact with the lowest part of scraping the scarp 15 of the oblique bank 14 of slag.Describedly scrape the oblique bank 14 of slag to be fixedly mounted on overhead gage 1-2 upper, described in scrape between slag oblique bank 14 tops and overhead gage 1-2 and be provided with long strip shape groove 23, when scraper plate 3-3 moves to long strip shape groove 23 place, waste residue is just in time pushed in long strip shape groove 23 by scraper plate 3-3.Described scraper plate 3-3 is elastic caoutchouc scraping blade.
Also comprise for the tail gas in insulated chamber 11 is drawn simultaneously the toxic and harmful of tail gas is removed bleed rotational flow generator 16.Described bleed rotational flow generator comprises tourie 16-4 and motor 16-1, the transmission shaft 16-2, the screw-blade 16-3 that are fixedly connected sequentially; Tourie 16-4 top is provided with gas discharge outlet 16-5; Described motor 16-1 drives transmission shaft 16-2 rotation, transmission shaft 16-2 drives screw-blade 16-3 rotation, and transmission shaft 16-2 stretches in tourie 16-4, in described transmission shaft 16-2, is provided with axial cavity, described axial cavity top is connected with insulated chamber 11, and the bottom of axial cavity is port; When screw-blade 16-3 rotates, above screw-blade 16-3, form negative pressure.
Between the water outlet 9 of heterogeneous air dissolved pump 2 and dissolved air water entrance 5, be also in series with equalizer 17; Described equalizer 17 comprises balanced cover 17-1 and is positioned at the corrugated deflector 17-2 of balanced cover 17-1.On equalizer 17, be also provided with the first tensimeter 18 for detection of equalizer 17 internal pressures, the second tensimeter 19 for detection of recirculation water pressure is also installed on recirculation water pipeline; Air flowmeter 22 for detection of the air flow quantity in air line 21 is also installed on the air line 21 being connected in the gas inlet 20 with heterogeneous air dissolved pump 2.
The process explanation of this isolation type multiphase balanced air floatation device: first waste water pass through static mixer, in static mixer with coagulating agent and the abundant hybrid reaction of coagulant aids, then enter isolation type multiphase balanced air floatation device, microbubble contacts with pollutent such as oils in water, fat, suspended substance etc., and pollutent is adsorbed on above bubble, along with bubble rising, pollutent is taken to the water surface, by slag scraper, be collected into the long strip shape groove as scum silica frost receiving tank, be finally pumped to recovery place; Tail gas discharges after processing by bleed rotational flow generator.
Compared with prior art, the advantage of this isolation type multiphase balanced air floatation device has: bubble diameter is less than 30 μ m, can effectively remove suspended substance in water; Reduce investment outlay, save the equipment such as pressurized vessel, air compressor machine, recycle pump, occupation area of equipment reduces 30%; Working cost is low, owing to saving the equipment such as pressurized vessel, air compressor machine, recycle pump, saves working cost 15%--30%; Easy to maintenance, original creation Novel residue scraping device; Easy and simple to handle, do not need frequent adjusting; Do not need nozzle clearing, OnNow, frequently start or stop; Isolated, can realize water, gas, slag isolation discharge.
About molten gas part, this isolation type multiphase balanced air floatation device is completed by the heterogeneous air dissolved pump of 1 import, during 50m3/h treatment capacity, power of motor only needs 4KW, maximum quantity of reflux 15m3/h, is partly comprised of return line, inlet pipe, air flowmeter, original creation equalizer, tensimeter, diaphragm valve etc.About slag scraper, because slag scraper can be extracted out and be sent into by import and export, can two-way extraction overhaul, during work, import and export sealing, therefore can be described as drawer type slag scraper, its driving chain is mechanical chain scraper plate, mechanical chain scraper plate by two stainless steel chains as transmission main body, every scraper plate is comprised of stainless steel clamping plate and elastic caoutchouc scraping blade, two ends have web member to support, and also can only elastic caoutchouc scraping blade, consist of, and the present embodiment adopts the latter.Bleed rotational flow generator is comprised of a bleed eddy flow machine and tourie, stores absorption liquid in tourie.Bleed rotational flow generator is mainly used to absorb processes the toxic and harmful containing in tail gas, and bleed rotational flow generator causes the tail gas in insulated chamber tourie and gas is fully broken up, and makes it fully to react with absorption liquid.Bleed rotational flow generator must be able to meet malleation 0.01MPa~0.05MPa pressure in cage, with in guaranteeing to cover without gas leak.
This isolation type multiphase balanced air floatation device can be realized solid-liquid separation, and the solid particulate granularity in sewage is very little, and particle itself and the flco density forming thereof are near or below water, is difficult to utilize the method for precipitation to remove from water.Also can realize liquid-liquid separation, the fine oil droplet of refiltered oil, organic solvent, tensio-active agent and each metal ion species etc. from sewage.Multiplex containing in the waste water of volatility toxic and harmful in actual production, can effectively remove the pollutents such as oils in waste water and suspended substance.In whole service process, the malleation in insulated chamber is at 0.01MPa~0.05MPa.

Claims (4)

1. an isolation type multiphase balanced air floatation device, comprises gas-floating chamber (1), heterogeneous air dissolved pump (2) and the slag scraper (3) for pollutent is removed from water; Described gas-floating chamber (1) one end is provided with waste water import (4) and dissolved air water entrance (5), and the other end is provided with clear water output (6) and recirculation water outlet (7); The water-in (8) of heterogeneous air dissolved pump (2) is communicated with recirculation water outlet (7) by pipeline, and the water outlet (9) of heterogeneous air dissolved pump (2) is communicated with dissolved air water entrance (5); Described slag scraper (3) is arranged on gas-floating chamber (1) top; Also comprise cage (10), described cage (10) is arranged on gas-floating chamber (1) top and is tightly connected with gas-floating chamber (1), cavity between cage (10) and gas-floating chamber is insulated chamber (11), and described slag scraper (3) is positioned at insulated chamber (11); At least one end face of described cage (10) is provided with for the import and export (12) of slag scraper (3) turnover with for importing and exporting the movable end plate (13) of (12) sealing; Described slag scraper (3) comprises transmitting gear (3-1), driving chain (3-2) and scraper plate (3-3); It is upper that described scraper plate (3-3) is arranged on driving chain (3-2), and transmitting gear (3-1) drives driving chain (3-2) to-and-fro movement, and driving chain (3-2) drives scraper plate (3-3) cyclic motion; In described gas-floating chamber (1), be provided with successively the first lower baffle plate (1-1), overhead gage (1-2) and the second lower baffle plate (1-3), exposure chamber (1-4), separate chamber (1-5), rising area (1-6) and exhalant region (1-7) will be divided in gas-floating chamber (1), suitable for reading the communicating in exposure chamber (1-4) and separate chamber (1-5), separate chamber (1-5) and rising area (1-6) end opening communicate, suitable for reading the communicating of rising area (1-6) and exhalant region (1-7); Also comprise and scrape the oblique bank of slag (14), when scraper plate (3-3) moves to, scrape the oblique bank of slag (14) when top, described scraper plate (3-3) can contact with the lowest part of scraping the scarp (15) of the oblique bank of slag (14); It is characterized in that: described in scrape the oblique bank of slag (14) to be fixedly mounted on overhead gage (1-2) upper, described in scrape between the oblique bank of slag (14) top and overhead gage (1-2) and be provided with long strip shape groove (23), when scraper plate(3-3) while moving to long strip shape groove (23) and locate, waste residue just in time by scraper plate(3-3) push in long strip shape groove (23); Described scraper plate (3-3) is elastic caoutchouc scraping blade; Also comprise for the tail gas in insulated chamber (11) is drawn to the bleed rotational flow generator (16) of the toxic and harmful of tail gas being removed simultaneously.
2. isolation type multiphase balanced air floatation device according to claim 1, is characterized in that: motor (16-1), transmission shaft (16-2), screw-blade (16-3) that described bleed rotational flow generator comprises tourie (16-4) and is fixedly connected sequentially; Tourie (16-4) top is provided with gas discharge outlet (16-5); Described motor (16-1) drives transmission shaft (16-2) rotation, transmission shaft (16-2) drives screw-blade (16-3) rotation, transmission shaft (16-2) stretches in tourie (16-4), in described transmission shaft (16-2), be provided with axial cavity, described axial cavity top is connected with insulated chamber (11), and the bottom of axial cavity is port; When screw-blade (16-3) rotates, in screw-blade (16-3) top, form negative pressure.
3. isolation type multiphase balanced air floatation device according to claim 1, is characterized in that: at heterogeneous air dissolved pump (2)water outlet (9) and dissolved air water entrance (5) between be also in series with equalizer (17); Described equalizer (17) comprises balanced cover (17-1) and is positioned at the corrugated deflector (17-2) of balanced cover (17-1).
4. according to claim 3described isolation type multiphase balanced air floatation device, is characterized in that: be also provided with the first tensimeter (18) for detection of equalizer (17) internal pressure, and for detection of second tensimeter (19) of recirculation water pressure; Air flowmeter (22) for detection of the air flow quantity in air line (21) is also installed on the air line (21) being connected in the gas inlet with heterogeneous air dissolved pump (2) (20).
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