CN101618896B - Current ejector aerated water preparation device - Google Patents

Current ejector aerated water preparation device Download PDF

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Publication number
CN101618896B
CN101618896B CN2009100559861A CN200910055986A CN101618896B CN 101618896 B CN101618896 B CN 101618896B CN 2009100559861 A CN2009100559861 A CN 2009100559861A CN 200910055986 A CN200910055986 A CN 200910055986A CN 101618896 B CN101618896 B CN 101618896B
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CN
China
Prior art keywords
water
outlet
connects
ejector
flotation cell
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CN2009100559861A
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Chinese (zh)
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CN101618896A (en
Inventor
杨剑平
徐耀林
吴菊芳
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上海天丰环保有限公司
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Priority to CN2009100559861A priority Critical patent/CN101618896B/en
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Abstract

The invention provides a current ejector aerated water preparation device which is characterized in that a current stabilizer is arranged on a connecting pipeline of a multistage centrifugal pump and a glass rotameter, and the current stabilizer is connected with a current ejector; the current ejector comprises a nozzle connected with the current stabilizer; an outlet of the nozzle is arranged at one side of an air chamber; the connecting position between the nozzle and the air chamber is provided with a regulating nut; an air suction opening is arranged on the side wall of the air chamber, and the other side of the air chamber is connected with a throat pipe; the throat pipe is connected with a tail pipe, and an outlet of the tail pipe is connected with a pipeline between the bottom of a water outlet pool and the multistage centrifugal pump. The invention can prepare the aerated water with high quality, improve the flotation processing effect and reduce the noise pollution of running.

Description

A kind of current ejector aerated water preparation device
Technical field
The present invention relates to a kind of current ejector aerated water preparation device, belong to technical field of sewage.
Background technology
Traditional dissolved air water is produced with air; As shown in Figure 1; Produce dissolved air water device synoptic diagram for the conventional air compressor, said device is made up of stage chamber pump 1, air 2, glass rotameter 3, dissolving 4, flotation cell water-in 5, reliever 6, flotation cell 7, slag chute 8, water outlet 9.Stage chamber pump 1 connects glass rotameter 3; Glass rotameter 3 connects the top inlet of dissolving 4, and dissolving 4 middle parts connect air 2, and the outlet at bottom of dissolving 4 connects the dissolved air water inlet that is positioned at flotation cell 7 one side bottoms; Said dissolved air water ingress is provided with reliever 6; Flotation cell 7 one side roof parts are provided with flotation cell water-in 5, and flotation cell 7 opposite side tops are provided with slag chute 8, and flotation cell 7 opposite side bottoms connect outlet sump; The top of outlet sump is provided with water outlet 9, and the bottom connects stage chamber pump 1.By air 2 pressurized air, in dissolving 4, produce dissolved air water with the high pressure water that stage chamber pump 1 produces, in flotation cell 7, to mix with the waste water of treating flotation through reliever 6, processed waste water is discharged from water outlet 9, and scum silica frost is effluxed by slag chute 8.The dissolved air water bubble that this method makes is big, of poor quality, and flotation effect is low; The dissolving water level that is in operation is unstable, and operation easier is big; In flotation cell, establish the dissolved air water reliever, result in blockage easily; Energy consumption was high when air moved in addition, and noise is big.
Summary of the invention
The purpose of this invention is to provide a kind of current ejector aerated water preparation device, it can make high-quality dissolved air water, improves the flotation treatment effect, reduces the sound pollution of operation.
In order to achieve the above object, technical scheme of the present invention provides a kind of current ejector aerated water preparation device, comprises stage chamber pump; The multistage centrifugal pump discharge connects current stabilizer, and current stabilizer connects glass rotameter, and glass rotameter connects the top inlet of dissolving; The outlet at bottom of dissolving connects the dissolved air water inlet that is positioned at flotation cell one side bottom, and flotation cell one side roof part is provided with the flotation cell water-in, and flotation cell opposite side top is provided with slag chute; Flotation cell opposite side bottom connects outlet sump; The bottom that the top of outlet sump is provided with water outlet, outlet sump connects the multistage centrifugal pump inlet, it is characterized in that, said current stabilizer middle part also is connected with ejector;
Wherein, Described ejector comprises the nozzle that links to each other with current stabilizer, and a side of air chamber is located in the outlet of nozzle, and the junction of nozzle and air chamber is provided with setting nut; The sidewall of air chamber is provided with suction opening; The opposite side of air chamber connects trunnion, the trunnion union tail, and the outlet of tail pipe connects the pipeline between outlet sump bottom and the multistage centrifugal pump inlet.
Further, the pipeline between the dissolved air water of the outlet at bottom of said dissolving and the flotation cell inlet is provided with reducing valve.
The ingress of said nozzle and the exit of tail pipe all are provided with variable valve.
Said ejector is arranged on vertical direction, and said nozzle is located at upside, and tail pipe is located at downside.
Principle of the present invention is: described ejector is the vent fan that a kind of principle design of utilizing fluidic ram pressure and statical head to transform mutually forms.Current penetrate through jet exit, form certain vacuum, and the air of outside is constantly sucked air chamber, and gas-liquid two-phase mixes through trunnion and produces violent turbulent fluctuation, shears that to make the water air become micro-bubble soluble in water, forms dissolved air water, discharges through trunnion, tail pipe.The waste water of treating flotation mixes in flotation cell with the dissolved air water that ejector is produced mutually; Dissolved air water camber dispersive micro-bubble just is attached on the pollutants in waste water; Float then and remove with slag scraper, realize that solid-liquid separation or liquid liquid separate, and improve wastewater effluent water quality to the water surface.Adjustment nut in the described ejector is used to regulate GWR, promptly through the amount of inlet water and the intake pressure of adjustment nozzle, realizes sucking the control of air capacity.Described current stabilizer is to be used for the stable dissolved air water that produces, and makes dissolved air water help flotation effect reposefully through getting into dissolving behind the glass rotameter.
The invention has the advantages that:
1, bubble diameter is in micron in the dissolved air water of producing, and dissolved air water is creamy white, and the bubble collapse time is about 1 times of dissolved air water that air produces in the decompression dispose procedure, and the dissolved air water quality is high, has improved the flotation treatment effect.
2, without air not only energy-conservation but also environmental protection.
3, dissolving stable level, the handled easily management, no complex construction in jar, cost is low.
4, ejector is made up of six partial monosomies, and assembling and dismounting are all very convenient.
5, ejector is equipped with setting nut, the adjustable GWR, and system operates steadily.
6, substitute reliever with reducing valve, not only economy but also difficult the obstruction.
Description of drawings
Fig. 1 produces dissolved air water device synoptic diagram for the conventional air compressor;
Fig. 2 is the ejector structural representation;
Fig. 3 is the current ejector aerated water preparation device synoptic diagram.
Embodiment
Specify the present invention below in conjunction with embodiment.As shown in Figure 3; Be the current ejector aerated water preparation device synoptic diagram, described current ejector aerated water preparation device is made up of stage chamber pump 1, glass rotameter 3, dissolving 4, flotation cell water-in 5, flotation cell 7, slag chute 8, water outlet 9, current stabilizer 10 and ejector 11.Stage chamber pump 1 connects current stabilizer 10; Current stabilizer 10 connects glass rotameter 3, and glass rotameter 3 connects the top inlet of dissolving 4, and the outlet at bottom of dissolving 4 connects the dissolved air water inlet that is positioned at flotation cell 7 one side bottoms; Flotation cell 7 one side roof parts are provided with flotation cell water-in 5; Flotation cell 7 opposite side tops are provided with slag chute 8, and flotation cell 7 opposite side bottoms connect outlet sump, and the top of outlet sump is provided with water outlet 9, the outlet sump bottom has pipeline to be connected with stage chamber pump 1 import; Said current stabilizer 10 middle parts also are connected with ejector 11 imports; Ejector 11 outlets are connected with stage chamber pump 1 inlet channel, form a circulation loop, are used for extracting air and produce dissolved air water.
As shown in Figure 2, be the ejector structural representation, described ejector 11 is made up of nozzle 101, setting nut 102, air chamber 103, suction opening 104, trunnion 105 and tail pipe 106.Nozzle 101 links to each other with current stabilizer 10 middle parts; A side of air chamber 103 is located in its outlet; Nozzle 101 is provided with setting nut 102 with the junction of air chamber 103, and the sidewall of air chamber 103 is provided with suction opening 104, and the opposite side of air chamber 103 connects trunnion 105; Trunnion 105 union tails 106, the outlet of tail pipe 106 connects the pipeline between outlet sump bottom and the stage chamber pump 1.
Pipeline between the dissolved air water inlet of the outlet at bottom of said dissolving 4 and flotation cell 7 is provided with reducing valve 12.
The exit of the ingress of said nozzle 101 and tail pipe 106 all is provided with variable valve.Said ejector 11 is arranged on vertical direction, and said nozzle 101 is located at upside, and tail pipe 106 is located at downside.
During work, the ingress of flotation cell 7 processing rear section water outlet gravity flow to multistage impeller pumps 1 is as the water source of producing dissolved air water.Stage chamber pump 1 is being not less than the direct draught work of 1 meter head, and inlet flows into the water after the supercharging from dissolving 4 tops through metering.The WP 0.30Mpa of dissolving 4~0.50Mpa, accounts for 5%~7% pressure water simultaneously in this and flows into ejector 11 from current stabilizer 10 4~5 minutes residence time; Current penetrate through nozzle 101 outlets, because the contraction in cross section, flow velocity increases; The static pressure at this place is sharply descended; When static pressure dropped to certain numerical value, the air of outside just flowed into air chambers 103 by suction opening 104 endlessly, and gas-liquid two-phase mixes through trunnion 105 and produces violent turbulent fluctuation, shears that to make the water air become micro-bubble soluble in water; Flow into stage chamber pump 1 simultaneously with the water outlet of flotation part again from tail pipe 106 discharges after forming dissolved air water, air water obtains thorough mixing once more.The dissolved air water of producing flows into dissolving 4 through glass rotameter 3 meterings after dissolving 4 top water distributions, stop 4~5min, presents the lactous dissolved air water, is flowed out by dissolving 4 bottoms again, after reducing valve 12 decompressions, gets into flotation cell 7.Dissolved air water mixes with the waste water that gets into from flotation cell water-in 5 in flotation cell mutually, and dissolved air water camber dispersive micro-bubble just is attached on the pollutants in waste water, floats then and is removed by slag scraper to the water surface, realizes the removal to pollutent in the waste water.
Adjustment nut 102 is used to regulate GWR, promptly when the water yield changes in the flotation cell, regulates adjustment nut 102, and the control amount of air drawn makes flotation cell stability and high efficiency ground move.
The variable valve in the exit of the ingress of said nozzle 101 and tail pipe 106 is used to regulate the ratio of the jet water yield and dissolved air water amount.
This device can be used for handling 5m 3/ h~500m 3/ h flotation treatment project, specific examples is following:
Embodiment 1
The treatment capacity 25m of the knitting bleaching dyeing and printing sewage of Shanghai International Automobile City Tourist Festival 3/ h, flotation processing, the COD of water outlet after the biochemical treatment are carried out in water outlet again after the biochemical treatment Cr=400~500mg/L, SS=160~250mg/L.Adopt the stage chamber pump 1 of model 1/2GL-5 * 2, the current stabilizer 10 of Φ 190 * 250, the reducing valve 12 of 4, six DN15 of dissolving of Φ 500 * 3000.
Operation result shows: COD CrBelow the water outlet 100mg/L, SS water outlet 7~10mg/L has improved the flotation treatment effect, and especially the SS clearance is high.Dissolved air water presents oyster white, and in the 1L graduated cylinder, the bubble collapse time is 5~6min; And the dissolved air water bubble collapse time that air compressor machine is produced is generally 2~3min.Current ejector aerated water preparation device is easy to operate, and the dissolving stable level time is long, and no air pocket is emerged in the flotation cell, and treatment effect is stable.
Embodiment 2
The knitting bleaching dyeing and printing sewage in Kunshan, Jiangsu, treatment capacity 40m 3/ h, water inlet COD Cr=600~900mg/L, SS=400~600mg/L.Adopt the centrifugal stage pump 1 of 50TSWA * 5 in the device, the current stabilizer 10 of Φ 219 * 250, the reducing valve 12 of 4, six DN20 of dissolving of Φ 800 * 3500.
Operation result shows: COD CrWater outlet 110~130mg/L, SS water outlet 10~12mg/L, flotation is handled very desirable, and especially the SS clearance is high.It is long to possess the bubble collapse time equally, easy to operate, advantages such as effect stability.

Claims (3)

1. current ejector aerated water preparation device; Comprise stage chamber pump (1), stage chamber pump (1) outlet connects current stabilizer (10), and current stabilizer (10) connects glass rotameter (3); Glass rotameter (3) connects the top inlet of dissolving (4); The outlet at bottom of dissolving (4) connects the dissolved air water inlet that is positioned at flotation cell (7) one side bottoms, and flotation cell (7) one side roof parts are provided with flotation cell water-in (5), and flotation cell (7) opposite side top is provided with slag chute (8); Flotation cell (7) opposite side bottom connects outlet sump; The bottom that the top of outlet sump is provided with water outlet (9), outlet sump connects stage chamber pump (1) import, it is characterized in that, said current stabilizer (10) middle part also is connected with ejector (11);
Wherein, Described ejector (11) comprises the nozzle (101) that links to each other with current stabilizer (10); A side of air chamber (103) is located in the outlet of nozzle (101), and nozzle (101) is provided with setting nut (102) with the junction of air chamber (103), and the sidewall of air chamber (103) is provided with suction opening (104); The opposite side of air chamber (103) connects trunnion (105); Trunnion (105) union tail (106), the outlet of tail pipe (106) connects the pipeline between outlet sump bottom and stage chamber pump (1) import, and the pipeline between the dissolved air water inlet of the outlet at bottom of said dissolving (4) and flotation cell (7) is provided with the reducing valve (12) that is used for substituting reliever.
2. a kind of current ejector aerated water preparation device as claimed in claim 1 is characterized in that, the exit of the ingress of said nozzle (101) and tail pipe (106) all is provided with variable valve.
3. a kind of current ejector aerated water preparation device as claimed in claim 1 is characterized in that, said ejector (11) is arranged on vertical direction, and said nozzle (101) is located at upside, and tail pipe (106) is located at downside.
CN2009100559861A 2009-08-06 2009-08-06 Current ejector aerated water preparation device CN101618896B (en)

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CN101618896B true CN101618896B (en) 2012-06-27

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103147333B (en) * 2012-02-21 2015-10-07 东莞市绿微康生物科技有限公司 The compound ejector of floatation and ink removing Self inhaling
CN102730781B (en) * 2012-07-03 2013-09-11 中国矿业大学 Circular current dissolved air copolymerization flotation system and technology
CN102765773A (en) * 2012-08-10 2012-11-07 北京中农天陆微纳米气泡水科技有限公司 Air floatation device
CN103363280B (en) * 2013-07-10 2016-06-29 西安交通大学 A kind of assembling ejector
CN103931547B (en) * 2014-04-29 2015-12-30 黄河科技学院 Novel high-pressure bubble reducing mechanism
CN111921395A (en) * 2020-07-30 2020-11-13 武汉大学 Dissolved air type water jet device and dissolved air type water jet generation method
CN112023741A (en) * 2020-08-28 2020-12-04 中南大学 Two-section cavitation bubble generator

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1493619A1 (en) * 1987-07-20 1989-07-15 Брестский инженерно-строительный институт Installation for treating waste water
CN1418824A (en) * 2002-12-25 2003-05-21 中国科学院生态环境研究中心 High-efficiency, circulation flow jetting and air dissolved in water type flotation method, and equipment therefor
CN2560625Y (en) * 2002-07-23 2003-07-16 刘宏烈 Jet pump dissolved air floatation machine
CN2647833Y (en) * 2003-05-20 2004-10-13 上海立方同和环境科技有限公司 Drug adding device with water jet variable frequency coagulating
CN2711140Y (en) * 2004-07-15 2005-07-20 三明市天地环保技术开发有限公司 Waste-water treatment equipment having jet-flow type air-dissolving air-floating means
CN201458786U (en) * 2009-08-06 2010-05-12 上海天丰环保有限公司 Aerated water preparation device of jet device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1493619A1 (en) * 1987-07-20 1989-07-15 Брестский инженерно-строительный институт Installation for treating waste water
CN2560625Y (en) * 2002-07-23 2003-07-16 刘宏烈 Jet pump dissolved air floatation machine
CN1418824A (en) * 2002-12-25 2003-05-21 中国科学院生态环境研究中心 High-efficiency, circulation flow jetting and air dissolved in water type flotation method, and equipment therefor
CN2647833Y (en) * 2003-05-20 2004-10-13 上海立方同和环境科技有限公司 Drug adding device with water jet variable frequency coagulating
CN2711140Y (en) * 2004-07-15 2005-07-20 三明市天地环保技术开发有限公司 Waste-water treatment equipment having jet-flow type air-dissolving air-floating means
CN201458786U (en) * 2009-08-06 2010-05-12 上海天丰环保有限公司 Aerated water preparation device of jet device

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