CN102120637A - Method for controlling and treating alumina alkaline waste water from aluminum factory by using acidic smoker waste gas - Google Patents

Method for controlling and treating alumina alkaline waste water from aluminum factory by using acidic smoker waste gas Download PDF

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Publication number
CN102120637A
CN102120637A CN 201010576480 CN201010576480A CN102120637A CN 102120637 A CN102120637 A CN 102120637A CN 201010576480 CN201010576480 CN 201010576480 CN 201010576480 A CN201010576480 A CN 201010576480A CN 102120637 A CN102120637 A CN 102120637A
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smoke exhaust
waste water
waste gas
alkaline waste
aluminum oxide
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CN 201010576480
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CN102120637B (en
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陈茂荣
姜宜宽
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National electric investment group Yuanda environmental protection equipment manufacturing Co Ltd
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Jiangsu Unisplendour Jidida Environmental Engineering Science & Technology Co Ltd
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Abstract

The invention relates to a method for controlling and treating alumina alkaline waste water from an aluminum factory by using acidic smoker waste gas. The method comprises the following steps: introducing the acidic smoker waste gas into a smoker waste gas filtration device, and spraying the alumina alkaline waste water by a spray system in the smoker waste gas filtration device so that acidic waste gas particles fully react with spray particles of alkaline waste water in the air, wherein the spray system comprises multiple nozzles which are used for repeatedly spraying descending smoker waste gas many times so as to gradually reduce the alkaline of the alumina alkaline waste water. Tests prove that the method has practicable application value, can effectively neutralize the alumina alkaline waste water, responds national laws and regulations related to environment protection, saves a large amount of funds and energy source, reduces the emission of waste water and waste gas and has the advantages of small investment and high resource utilization rate; in addition, sulfides and nitric oxides in the smoker waste gas are absorbed by the alumina alkaline waste water, thereby achieving the technical effects of smoke abatement, desulfuration and dust removal.

Description

Adopt the flue dust acid waste gas to administer the method for aluminium manufacturer's aluminum oxide alkaline waste water
Technical field
The present invention relates to the method for a kind of aluminium manufacturer aluminum oxide alkaline waste water, particularly relate to a kind of method that adopts the flue dust acid waste gas to administer the aluminum oxide alkaline waste water.
Background technology
At present, the scheme of the attenuating aluminium manufacturer aluminum oxide alkaline waste water of applying is, contain certain flocculation composition and the less demanding particular case of aluminum oxide reuse water at the aluminum oxide alkaline waste water, carried out two kinds of aluminum oxide alkaline industrial waste water and the sanitary sewages waste water of different nature technical scheme of purifying waste water that interacts.PH value according to alkaline waste water is selected different blending ratios, has developed sewage water treatment method, and the water quality after the processing reaches the requirement of alumina producing reuse.In this scheme, the flocculation composition in the alkaline industrial waste water has promoted the sedimentation of suspended substance, and by flocculating settling, separation, diluting effect, pollutent is purified.The ratio of mixture of sewage (alkaline industrial waste water/sanitary sewage) has bigger relation with the pH value and the basicity of alkaline industrial waste water, test by industrial applications, difference according to alkaline industrial waste water pH value, ratio of mixture is chosen in 3: 1~1: 3 scope in, at present, discovery has two kinds of optimum mixture ratios, when alkaline industrial sewage pH value less than 10 the time, ratio of mixture is selected 3: 1; When the pH value equaled 10~11, ratio of mixture was selected 1: 1; When the pH value greater than 11 the time, the sanitary sewage ratio of mixture can suitably improve, maximum should not be above 1: 3.The water quality that sewage mixes after purifying all can satisfy alumina producing reuse requirement.Operation shows, with after alkaline industrial waste water mixes, utilizes existing Industrial Wastewater Treatment station facility to handle sanitary sewage.In addition, the enterprise that some industrial scale is bigger has also formulated the resolution of aluminum oxide waste water zero emission.Concrete measure is, according to the different requirements of reuse water user to water quality, selects rational sewage treatment process (precipitation-filtration), and visual plant, critical process etc. has been adopted double water source water supply with water spot, and promptly reuse water and industrial fresh water are standby each other.
There are numerous small-sized aluminium manufacturers of getting on the job with indigenous methods in China, and the discharging of aluminum oxide alkaline waste water exceeds standard and is difficult to and administers, and water surrounding is caused great harm.And because alkali is one of main raw of producing in aluminum oxide, the discharge process of waste water also is the process of material and alkali loss.Yet the scheme cost of existing all processing aluminum oxide alkaline waste waters is too high, promptly needs to consume great amount of water resources, needs again to drop into a large amount of funds, has hindered the use of numerous small-sized aluminium manufacturers.
Summary of the invention
The invention provides a kind of method that adopts the flue dust acid waste gas to administer the aluminum oxide alkaline waste water; through evidence this method have actual using value; aluminum oxide alkaline waste water effectively can neutralize; the rules of national relevant environment protection have been responded; the a large amount of funds and the energy have been saved; less investment, the resource utilization height has reduced waste water and exhaust gas discharging.
Simultaneously, the present invention also can utilize the aluminum oxide alkaline waste water to absorb sulfide and oxynitride in the smoke exhaust, has reached the technique effect of reducing smoke and dust and desulfurizing.
The invention provides a kind of method that adopts the flue dust acid waste gas to administer aluminium manufacturer's aluminum oxide alkaline waste water, the smoke exhaust that will contain acidic oxide, sulfide and oxynitride feeds smoke exhaust filtration unit 18, the aluminum oxide alkaline waste water is sprayed by the fog system in the smoke exhaust filtration unit 18 9, makes the spraying granule of acid waste gas particle and alkaline waste water fully react aloft.
Fog system 9 comprises filtering net 12, force (forcing) pump 13, magnetic valve 14, nozzle 16 and spray pipe, force (forcing) pump 13 superchargings, the aluminum oxide alkaline waste water along spray pipe via filtering net 12, force (forcing) pump 13, magnetic valve 14 is from nozzle 16 ejection.
Preferably, fog system 9 comprises three layers of nozzle arrangements, and every layer comprises three row's nozzles again, and every row has two nozzles 16, repeatedly the smoke exhaust in descending is sprayed repeatedly, makes the alkalescence of aluminum oxide alkaline waste water progressively successively decrease.
The flue dust acid waste gas enters the smoke exhaust treatment chamber 3 of filtrating smoke dust device 18 from smoke exhaust import 1, through fog system 9 sprays, the spraying granule of acid waste gas particle and alkaline waste water fully reacts, smoke exhaust behind the spray falls into circulating water pool 6 along smoke exhaust decline passway 4, and the evaporable smoke exhaust exports 1 and discharges along smoke exhaust rising passway 5 from smoke exhaust.
Preferably, the end of smoke exhaust import 10 adopts goes up bend pipe structure, and the acid waste gas side direction is sprayed towards nozzle 16.
The employed equipment of this method comprises aluminum oxide alkaline waste water collection box 11, fog system 9, filtrating smoke dust device 18 and circulating water pool 6.
Smoke exhaust filtration unit 18 comprises smoke exhaust treatment chamber 3, and smoke exhaust import 10 and smoke exhaust decline passway 4 place the central authorities of smoke exhaust treatment chamber 3, and smoke exhaust rising passway 5 places the periphery of smoke exhaust decline passway 4.Smoke exhaust filtration unit 18 bottoms are circulating water pools 6 of aluminum oxide alkaline waste water.
Alkaline waste water collection box 11, filtering net 12, nozzle 16 all adopt the material of corrosion-and high-temp-resistant to make.
Description of drawings
Fig. 1 administers the principle of work synoptic diagram of aluminum oxide alkaline waste water for adopting the flue dust acid waste gas among the present invention;
Fig. 2 is the synoptic diagram of smoke exhaust filtration unit, wherein,
1, smoke exhaust outlet; 2, access opening; 3, smoke exhaust treatment chamber; 4, smoke exhaust decline passway; 5, smoke exhaust rising passway; 6, circulating water pool; 7, upflow tube; 8, scum pipe, 9, fog system; 10, smoke exhaust import; 11, aluminum oxide alkaline waste water collection box; 12, filtering net; 13, force (forcing) pump; 14, magnetic valve; 16, nozzle; 18, filtrating smoke dust device
Embodiment
Utilize the equipment of acidic oxide improvement aluminum oxide alkaline waste water in the smoke exhaust to comprise aluminum oxide alkaline waste water collection box 11, fog system 9, filtrating smoke dust device 18.
Aluminum oxide alkaline waste water collection box 11 is a stainless steel, and volume is 15 cubic metres, 5 millimeters of thickness.
Fog system 9 comprises filtering net 12, force (forcing) pump 13, magnetic valve 14, nozzle 16 and atomizer passgae.The working process of fog system 9 is as follows, and after force (forcing) pump 13 work, the aluminum oxide alkaline waste water enters force (forcing) pump 13 through filtering net 12, and force (forcing) pump 13 adds to pressure about 1MPa,, is sprayed by nozzle 16 at last through magnetic valve 14 by atomizer passgae.
Smoke exhaust filtration unit 18 comprises smoke exhaust import 10, smoke exhaust outlet 1 and the access opening 2 that is used to overhaul, from top to bottom set gradually smoke exhaust outlet 1, access opening 2, nozzle 16 and the smoke exhaust treatment chamber 3 that includes smoke exhaust decline passway 4 and smoke exhaust rising passway 5.Smoke exhaust import 10 and smoke exhaust decline passway 4 place the central authorities of smoke exhaust treatment chamber 3, and smoke exhaust rising passway 5 places the periphery of smoke exhaust decline passway 4, are circulating water pools 6 of aluminum oxide alkaline waste water in smoke exhaust filtration unit 18 bottoms.After having adopted such structure, the workflow that the smoke exhaust of this filtration unit 18 is handled is; The circulating water pool 6-smoke exhaust rising passway 5-smoke exhaust outlet 1 of the aluminum oxide alkaline waste water of smoke exhaust import 10-smoke exhaust treatment chamber 3-fog system 9 spray-smoke exhaust decline passway 4-chimney bottom.
Sulfide among aluminum oxide alkaline waste water and the flue dust, oxynitride generation chemical action, moisture remains and accounts for leading component, and water has also played very big effect, and the moisture here refers to the moisture in the aluminum oxide alkaline waste water, need not add water in addition.The sulfurous gas that contains in the smoke exhaust, nitrogen peroxide enter in the smoke exhaust treatment unit 18, and high-temperature gas runs into water and forms sulfuric acid, sulfurous acid, and nitric acid, nitrous acid and water are fallen in the circulating water pool 6 together.
Smoke exhaust filtration unit 18, as shown in Figure 2, adopt the screen cloth barrel structure, filtering net 12 has 15 layers, can on screen cloth, form water membrane in the course of the work, moisture film plays the effect of filter dirt and desulfurization, constitutes the screen cloth of screen cloth tube side and bottom surface and can be respectively makes with any high temperature resistant, corrosion-resistant material (as stainless steel).Their aperture can be identical or different, generally is respectively 3.6mm.If the aperture is too little, then the dust in the smoke exhaust can stop up mesh, if the aperture is too big, then smoke exhaust is passed speeding up of this screen cloth tube, and sulfur limitation effect can descend.Constitute the screen cloth of screen cloth tube side and bottom surface can be respectively be that the Stainless Steel Wire of 0.5mm and 1.0mm is made with diameter.Manufacturing cost and erosion resistance factor are mainly considered in the selection of Stainless Steel Wire diameter.So because bottom corrosion all around selects for use thicker Stainless Steel Wire to make greatly.Top, middle part and bottom at smoke exhaust filtration unit 18 are respectively equipped with fog system 9, and each layer fog system is three rows, and each row is made up of two nozzles 16, shown in A-A sectional view among Fig. 1.Nozzle 16 adopts stainless material, aperture 1.5mm.
Fog system 17 comprises filtering net 12, force (forcing) pump 13, and magnetic valve 14, nozzle 16, filtering net 12 is main filter element with 100 purpose stainless (steel) wires, filters the impurity in the aluminum oxide alkaline waste water.Force (forcing) pump 13 adopts the horizontal corrosion-resistant water pump of pipeline force (forcing) pump BLC70/037, and this pump is horizontal topping-up pump, closed single suction formula blade wheel structure, flow 1-7m 3/ h, impeller number 1, lift 17-10m, shaft power 0.37kW.Magnetic valve 14 adopts the anticorrosive magnetic valve M324969 of the long-range Science and Technology Ltd. in Chinese and Western, Beijing.
An induced-draught electric motor is installed at smoke exhaust import 10 places, 4 kilowatts of power, the end of smoke exhaust import 10 can adopt bend pipe structure, as shown in Figure 2, make exhaust gas side, have higher wind speed to spraying to nozzle 16, make smoke exhaust and spraying bump, feasible contact is more thorough, promptly lowers aluminum oxide alkalescence, makes the smoke exhaust treatment effect obviously be better than the structure of straight tube again.
The mean concns of sulfurous gas is 150mg/m in the smoke exhaust 3Because the size of the acidic oxide in the flue dust only is 0.8 μ m~5 μ m, these particle suspensions have formed smog in the warm air of chimney, and the granular size of the aluminum oxide alkaline waste water that is sprayed by nozzle 16 is 3 μ m~5 μ m, when the acidic oxidation composition granule in the flue dust during less than aluminum oxide alkaline waste water spraying granule, acidic oxidation composition granule in the flue dust is enclosed in around the aluminum oxide alkaline waste water spraying granule, when the acidic oxide in the flue dust equals aluminum oxide alkaline waste water granular size, the soda acid chemical action takes place in soot dust granule and aluminum oxide alkaline waste water particle one to one, when the acidic oxidation composition granule in the flue dust during greater than aluminum oxide alkaline waste water granular size, the alkaline waste water spraying granule is enclosed in around the acidic oxide in the flue dust, with dripping, the acidic oxide particulate aluminum oxide alkaline waste water in the flue dust do not carry out fully neutralization reaction and sinks to simultaneously going in the circulating water pool 6 thereby make, owing to only be skin generation soda acid chemical action in the aluminum oxide alkaline waste water that sprays first at each droplet, the particle of flue dust and soda acid chemical action phenomenon does not take place in inside, thus the aluminum oxide alkaline waste water that drops in the circulating water pool still has than the highly basic chemical action.Be exactly to consider this phenomenon thereby carry out repeatedly cyclic spray in our design, the acidic oxidation composition granule that contains in the aluminum oxide alkaline waste water is successively decreased one by one, and alkalescence is successively decreased one by one, the acidic oxide that finally reaches in the flue dust is minimum, cyclic spray five times, substantially the composition that can reach the aluminum oxide that contains in the aluminum oxide alkaline waste water reduces one by one, has removed flue dust acidic oxide in the smoke exhaust again, and effect sees Table 1.
Table 1
By breadboard detected result, aluminum oxide alkalescence is about 10 to drop to 7 by PH, and the acidic oxide in the smoke exhaust obviously lowers, and the effect that reaches national examination criteria is tangible.Here point out also that aluminium manufacturer's aluminum oxide alkaline waste water is the strong basicity oxide compound, all acidic oxides in energy and the smoke exhaust play neutralization reaction.Aluminium manufacturer's waste water is used through the middle cooperation of flue dust acidic oxide after testing, pH value eases down to 7 by about 10, if pH value is higher after testing, utilize the flue dust acid waste gas to administer the purpose of aluminium manufacturer's wastewater oxidation aluminium alkalescence up to having reached thereby then increase the round-robin number of times.
In addition, what need be illustrated is, finally being discharged to all acidic oxides by in aluminium manufacturer's aluminum oxide alkaline waste water and the smoke exhaust in the circulatory pool, to play the salt compounds that neutralization reaction generates also be a class trade effluent.It is utilized or handles by other patented technology and carry out special topic statement.The center technology of patent of the present invention only is to utilize the flue dust acid waste gas to administer the purpose of aluminium manufacturer's wastewater oxidation aluminium alkalescence.As for used equipment, also can adopt the device structure mentality of designing that has covered acidic oxide in nearly all elimination smog in the prior art.Comprise: filter plant, spraying, moisture film generation equipment, precipitation or recovery system more.

Claims (10)

1. method that adopts the flue dust acid waste gas to administer aluminium manufacturer's aluminum oxide alkaline waste water, it is characterized in that, the smoke exhaust that will contain acidic oxide, sulfide and oxynitride feeds smoke exhaust filtration unit (18), the aluminum oxide alkaline waste water is sprayed by the fog system that stretches into smoke exhaust filtration unit (18) (9), makes the spraying granule of acid waste gas particle and alkaline waste water fully react aloft.
2. the method for claim 1, it is characterized in that, fog system (9) comprises filtering net (12), force (forcing) pump (13), magnetic valve (14), nozzle (16) and spray pipe, force (forcing) pump (13) supercharging, aluminum oxide alkaline waste water along spray pipe via filtering net (12), force (forcing) pump (13), magnetic valve (14) sprays from nozzle (16).
3. method as claimed in claim 2, it is characterized in that, the flue dust acid waste gas enters the smoke exhaust treatment chamber (3) of smoke exhaust filtration unit (18) from smoke exhaust import (1), through fog system (9) spray, the spraying granule of acid waste gas particle and alkaline waste water fully reacts, smoke exhaust behind the spray falls into circulating water pool (6) along smoke exhaust decline passway (4), and the evaporable smoke exhaust exports (1) and discharges along smoke exhaust rising passway (5) from smoke exhaust.
4. method as claimed in claim 3 is characterized in that, fog system (9) comprises three layers of nozzle arrangements, every layer comprises three row's nozzles again, every row has two nozzles (16), repeatedly the smoke exhaust in descending is sprayed repeatedly, makes the alkalescence of aluminum oxide alkaline waste water progressively successively decrease.
5. method as claimed in claim 4 is characterized in that, the end of smoke exhaust import (10) adopts goes up bend pipe structure, and the acid waste gas side direction is sprayed towards nozzle (16).
6. as the arbitrary described method of claim 1-5, it is characterized in that employed equipment comprises aluminum oxide alkaline waste water collection box (11), fog system (9), filtrating smoke dust device (18) and circulating water pool (6).
7. method as claimed in claim 6, it is characterized in that, smoke exhaust filtration unit (18) comprises smoke exhaust treatment chamber (3), smoke exhaust import (10) and smoke exhaust decline passway (4) place the central authorities of smoke exhaust treatment chamber (3), and smoke exhaust rising passway (5) places the periphery of smoke exhaust decline passway (4).
8. method as claimed in claim 7 is characterized in that, smoke exhaust filtration unit (18) bottom is the circulating water pool (6) of aluminum oxide alkaline waste water.
9. method as claimed in claim 8 is characterized in that, smoke exhaust filtration unit (18) adopts the screen cloth barrel structure, has 15 layers of filtering net.
10. method as claimed in claim 9 is characterized in that, alkaline waste water collection box (11), and filtering net (12), nozzle (16) all adopts the material of corrosion-and high-temp-resistant to make.
CN 201010576480 2010-12-07 2010-12-07 Method for controlling and treating alumina alkaline waste water from aluminum factory by using acidic smoker waste gas Active CN102120637B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103752155A (en) * 2013-12-31 2014-04-30 上海宝钢磁业有限公司 Method for spraying and neutralizing by wastewater generated in pure water preparation
CN104089291A (en) * 2014-07-25 2014-10-08 邓雪明 Gas-liquid mixed soot blowing device
CN105000615A (en) * 2015-07-31 2015-10-28 桂林威迈壁纸有限公司 Wallpaper production waste water treating device
CN110357297A (en) * 2019-07-02 2019-10-22 马鞍山星奇达新材料科技有限公司 Water recovery method and its device in one kind alkaline waste water containing aluminium
CN110759536A (en) * 2019-11-12 2020-02-07 郭慧珍 Tungsten waste water convection purification device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201182964Y (en) * 2008-04-30 2009-01-21 中国恩菲工程技术有限公司 Acid-containing waste gas wash defogging apparatus

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
CN201182964Y (en) * 2008-04-30 2009-01-21 中国恩菲工程技术有限公司 Acid-containing waste gas wash defogging apparatus

Non-Patent Citations (1)

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Title
《有色金属》 20071130 陈云嫩等 "赤泥附液吸收烟气中的二氧化硫" 第153-155页 1-10 第59卷, 第4期 2 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103752155A (en) * 2013-12-31 2014-04-30 上海宝钢磁业有限公司 Method for spraying and neutralizing by wastewater generated in pure water preparation
CN104089291A (en) * 2014-07-25 2014-10-08 邓雪明 Gas-liquid mixed soot blowing device
CN104089291B (en) * 2014-07-25 2016-10-05 邓雪明 A kind of gas-liquid mixed soot blower
CN105000615A (en) * 2015-07-31 2015-10-28 桂林威迈壁纸有限公司 Wallpaper production waste water treating device
CN110357297A (en) * 2019-07-02 2019-10-22 马鞍山星奇达新材料科技有限公司 Water recovery method and its device in one kind alkaline waste water containing aluminium
CN110759536A (en) * 2019-11-12 2020-02-07 郭慧珍 Tungsten waste water convection purification device

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Address after: 224053 environmental protection industrial park, Nanyang Economic Zone, Jiangsu, Yancheng City Province, No. five

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Address after: 224053 environmental protection industrial park, Nanyang Economic Zone, Jiangsu, Yancheng City Province, No. five

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