CN104016567B - A kind of mud magnetic dewatering agent and dewatering thereof - Google Patents
A kind of mud magnetic dewatering agent and dewatering thereof Download PDFInfo
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- CN104016567B CN104016567B CN201410230325.9A CN201410230325A CN104016567B CN 104016567 B CN104016567 B CN 104016567B CN 201410230325 A CN201410230325 A CN 201410230325A CN 104016567 B CN104016567 B CN 104016567B
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Abstract
The present invention relates to a kind of magnetic dewatering agent and dewatering thereof, as following weight percent each becomes to be grouped into for described its component of magnetic dewatering agent and content: acrylamide 9 ~ 19%, chitin 7 ~ 17%, iron(ic) chloride 14 ~ 21%, sodium-chlor 10 ~ 17%, aluminum chloride 15 ~ 22%, the vitriol oil 1 ~ 8%, iron powder 15 ~ 32%, described dewatering agent raw material sources are extensively and cheap.The present invention adopts magnetic water extracter, magnetic dewatering agent of the present invention is utilized to dewater to mud, the deep dehydration of mud can also be realized while reducing the sludge dewatering time, can by 1 ton of water ratio be directly 60% ~ 99% mud dewatered in 45 minutes to water ratio and reach 25-45%, greatly facilitate the subsequent disposal of mud, meet the follow-up requirement carrying out second ploughing, greening, solve a large amount of process disposal difficulties of stacking mud.Adopt magnetic water extracter, economical, easy, dewatering efficiency is good.
Description
Technical field
The present invention relates to the sludge dehydrating agent of dirt, waste water and technical field of sludge treatment, particularly relate to a kind of magnetic sludge dewatering agent adopted in the dehydration process of Sewage Plant dewatered sludge.
Background technology
The mixing sludge that sanitary sewage disposal produces and the biological treatment mud that trade effluent produces are typical organic sludges, and generation is large, and a treatment scale is that the sludge yield of the medium-sized Sewage Plant of 100,000 tons/day is at about 600 tons.For Shanghai City, sewage coagulation amount is 3,710,000 tons/day, produces 22260 tons/day, mud.Need thickening process be carried out to above-mentioned high water content sludge, at present, have multiple sludge dehydrating agent and dewatering:
The patent No. is: " ZL200410050738.5 " name is called: relate to a kind of cation type polymer dewatering agent for sludge dewatering in the patent of invention of " sludge dehydrating agent and preparation method thereof ", this dewatering agent with positively charged ion or non-ionic polyacrylamide, formaldehyde, organic amine, water for raw material, be aided with that a small amount of sequestrant and reaction promotor be obtained by reacting with the sludge dewatering of the amine methyl polyacrylamide industry such as colloid aqueous solution process oil, chemical industry that is main component.
The patent No. is: " ZL200310110552.X " name is called: relate to a kind of bodied ferric sulfate in the patent of invention of " a kind of efficient nano sludge dehydration conditioner ", polyacrylamide, the dehydrating and conditioning agent of sodium cellulose glycolate and nano material composition, there is neutralising capacity, bridging ability and stronger seepage force, make sludge dewatering pretreating effect good, speed is faster.
The patent No. is: " ZL00814895.3 " name is called: the method that relate to sludge dewatering in the patent of invention of " cationic polymers for sludge dewatering ", comprises and adopts flocculant aid and flocculation agent lignin-sludge, then by sludge dewatering.Flocculation agent and flocculant aid provide with solids composition, and to be joined by water in composition to form the aqueous solution or the dispersion of composition, are then joined in mud, make sludge dewatering.
Above sludge dewatering patented technology differs from one another, and relates generally to organic dewatering agent and amendment, is applicable to dehydration and the stabilization of high water content sludge and mud, interstitial water most in mud and capillary water can be removed.But because of in mud containing a large amount of organic matter, there is the surface water of organic cell plastid and cell interior shipwreck at present with the problem removed.The water ratio of general mud after thickening is still more than 80%, if generally also need by heating means process for dewatering further, cause complex process, processing cost is high; In addition, the soft thickness of mud matter of high-moisture percentage like this, perishable easily smelly, bulky, bearing capacity is poor, in loading, transport and process disposal process, there is operational difficulty, secondary pollution, the high a lot of problem of power consumption.
Summary of the invention
In view of the deficiencies in the prior art, first object of the present invention is by studying the prescription of existing sludge dehydrating agent, the magnetic dewatering agent that a kind of technique is simple, with low cost, dewatering speed is fast, dewatering efficiency is high is provided, add described magnetic sludge dewatering agent in mud after, mud can be made to have certain magnetic, thus magnetic water extracter can be used to slough moisture in mud.
First object of the present invention is achieved in that
A kind of magnetic dewatering agent, is characterized in that: as following weight percent each becomes to be grouped into for described its component of magnetic dewatering agent and content:
Acrylamide 9 ~ 19%
Chitin 7 ~ 17%
Iron(ic) chloride 14 ~ 21%
Sodium-chlor 10 ~ 17%
Aluminum chloride 15 ~ 22%
The vitriol oil 1 ~ 8%
Iron powder 15 ~ 32%.
Another object of the present invention is to provide a kind of deep dehydration method for sludge, comprise the steps:
(1) described magnetic dewatering agent is prepared, wherein, described magnetic dewatering agent is made up of each component of following weight percent content: acrylamide content is 9 ~ 19% of described dewatering agent total amount, chitin content is 7 ~ 17% of described dewatering agent total amount, iron(ic) chloride content is 14 ~ 21% of described dewatering agent total amount, sodium chloride content is 10 ~ 17% of described dewatering agent total amount, aluminum chloride content is 15 ~ 22% of described dewatering agent total amount, vitriol oil content is 1 ~ 8% of described dewatering agent total amount, iron content is 15 ~ 32% of described dewatering agent total amount, the described vitriol oil is placed separately, stand-by, described acrylamide, chitin, iron(ic) chloride, sodium-chlor, aluminum chloride, iron powder is poured into beaker after mixing by described content, 1:1 clear water is added in beaker, the water-bath of then beaker being put into boiling is heated, until all moisture evaporations completely, take out mixture and ground powdered,
(2) the pending mud that water ratio is 60 ~ 99% is got, the powder after mixing grinding described in step (1) is first added in mud, stir, and then in mud, add the vitriol oil of weight described in step (1), continue to stir, obtain modified good mud, wherein, the consumption of described dewatering agent is 5 ~ 10% of mud weight;
(3) pour in magnetic water extracter 5 ~ 15min, the 60r/min ~ 120r/min that dewaters after modified good mud described in step (2) being left standstill 20 ~ 45 minutes into, water extracter adsorbs mud by magnetic action, discharges clear water.Measure described mud respectively and leave standstill 20 minutes, 25 minutes, 30 minutes, 35 minutes, 40 minutes, the water ratio after 45 minutes.
Sludge Dewatering Flocculant dewatering Principle of the present invention is as described below:
The effect of acrylamide
Acrylamide is by the surface charging electric charge on some mud small-particles of neutralization, single small-particle is made to become instability to promote throwing out, then small-particle is flocculated agent and adsorbs, thus between particle, play active functional group bridging action, and reflocculation forms larger floss.
The effect of chitin
Chitin can form flocculation molecule in water, and flocculation molecule combines multiple mud granule molecule by ionic linkage, hydrogen bond simultaneously, thus plays the effect of " middle bridge ".In the present invention, the flocculation molecule that chitin can be formed in water, can be bound up these particles, thus the entirety making it formation one large precipitates, and then promotes flocculating effect.
The effect of iron(ic) chloride
Iron(ic) chloride generates multiple hydrolysate in water with after hydrate alkalinity effect, afterwards combine and form Fe (OH) 3, these hydrolysates are with a lot of positive charge, these positive charges can not only in and colloidal particle on negative charge, can also with electronegative particulate matter and Fe (OH)
3combine.Given this, iron(ic) chloride has flocculation ability and forms alumen ustum.In patent of the present invention, the alumen ustum that iron trichloride is formed, with the hydrogen sulfide (H in sewage
2s), phosphoric acid salt (PO
4), arsenate (AsO
4) and hydrate alkalinity (OH
-) chemical reaction occurs generate precipitation, therefore the heavy metal in waste water and mud and sulfide precipitation can get off by iron(ic) chloride, and its ferric oxide alumen ustum formed is difficult to again the material of degrading in adsorbable water, and then promotes flocculating effect.
The effect of sodium-chlor
From solid solubility, add sodium-chlor in mud after, the chemical substance of other and chloride binding, as the meltage in water such as calcium ion, magnesium ion can reduce, thus promotes the precipitation of calcium ion, magnesium ion etc.In sludge dehydration process of the present invention, calcium ion, magnesium ion etc. are diffused in mud, along with the precipitation of calcium ion, magnesium ion etc., and can accelerate sludge settling process.
The effect of aluminum chloride
In the present invention, aluminum chloride is hydrolyzed and generates hydroxide radical, hydroxide radical and the combination such as calcium ion, magnesium ion in water, makes calcium ion, magnesium ion etc. generate precipitation.Sludge Dewatering Flocculant of the present invention, in sludge dehydration process, calcium ion, magnesium ion etc. are diffused in again in mud, along with the precipitation of calcium ion, magnesium ion etc., also can the precipitation of accelerate sludge.
The effect of iron powder
Described in patent of the present invention, dewatering agent is in lignin-sludge dehydration, gets off after first iron powder mixes with mud with mud coprecipitation again, thus makes mud have certain magnetic, and then can use magnetic water extracter, has adsorbed mud fast and effectively.
The effect of the vitriol oil
The effect of the vitriol oil mainly contains 2 points: 1, as catalyzer, in patent of the present invention, the vitriol oil can accelerate pharmaceutical chemicals, as aluminum chloride, iron(ic) chloride etc. play a role, and then promotes whole sludge dehydration process, saves time; 2, in mud dewatering method of the present invention, the vitriol oil can with the combination such as the calcium ion in mud, magnesium ion, make calcium ion, magnesium ion etc. generate precipitation, because calcium ion, magnesium ion etc. are diffused in mud, along with the precipitation of calcium ion, magnesium ion etc., accelerate the precipitation of mud.
Compared with prior art, the invention has the beneficial effects as follows:
(1) a kind of magnetic dewatering agent of the present invention, the component of employing is as extensive and cheap in the raw material sources such as chitin, acrylamide, greatly reduces the running cost of sludge dewatering treatment; (2) magnetic dewatering agent of the present invention is utilized, the deep dehydration of mud can also be realized while reducing the sludge dewatering time, can by 1 ton of water ratio be directly 60% ~ 99% mud dewatered in 45 minutes to water ratio and reach 25-45%, greatly facilitate the subsequent disposal of mud; (3) the inventive method adopts the dehydration of magnetic water extracter, economical, easy, dehydrating effect is good; (4) the inventive method assembles sedimentation by electrical counteract effect, ion precipitation reaction, catalysis and bridge linking effect, improve the physico-mechanical properties of mud, meet the follow-up requirement carrying out second ploughing, greening, solve a large amount of process disposal difficulties of stacking mud.
Embodiment
Embodiment 1
(1) prepare described magnetic dewatering agent 50Kg, wherein, each component concentration of described magnetic dewatering agent is as follows: acrylamide 4.5Kg, chitin 8.5Kg, iron(ic) chloride 10.5Kg, sodium-chlor 7.5Kg, aluminum chloride 7.5Kg, vitriol oil 4Kg, iron powder 7.5Kg, places the described vitriol oil separately, stand-by; Pour described acrylamide, chitin, iron(ic) chloride, sodium-chlor, aluminum chloride, iron powder into beaker after mixing by described weight, in beaker, add clear water, described in add clear water and mixture volume ratio be: 1:1.The water-bath of then beaker being put into boiling is heated, until all moisture evaporations completely, takes out mixture and is ground powdered;
(2) the pending mud that 1 ton of water ratio is 60% is got, in mud, first add the powder after mixing grinding described in step (1), stir, and then in mud, add the vitriol oil of weight described in step (1), continue to stir, obtain modified good mud;
(3) pour in magnetic water extracter after modified good mud described in step (2) being left standstill 20 ~ 45 minutes and dewater, 5 ~ 15min, 60r/min ~ 120r/min, water extracter adsorbs mud by magnetic action, discharges clear water.Measure described mud respectively and leave standstill 20 minutes, 25 minutes, 30 minutes, 35 minutes, 40 minutes, the water ratio after 45 minutes.
Embodiment 2
(1) prepare described magnetic dewatering agent 60Kg, wherein, each component concentration of described magnetic dewatering agent is as follows: acrylamide 11.4Kg, chitin 4.2Kg, iron(ic) chloride 8.4Kg, sodium-chlor 10.2Kg, aluminum chloride 9Kg, vitriol oil 0.6Kg, iron powder 16.2Kg, places the described vitriol oil separately, stand-by; Pour described acrylamide, chitin, iron(ic) chloride, sodium-chlor, aluminum chloride, iron powder into beaker after mixing by described weight, in beaker, add clear water, described in add clear water and mixture volume ratio be: 1:1.The water-bath of then beaker being put into boiling is heated, until all moisture evaporations completely, takes out mixture and is ground powdered;
(2) the pending mud that 1 ton of water ratio is 70% is got, in mud, first add the powder after mixing grinding described in step (1), stir, and then in mud, add the vitriol oil of weight described in step (1), continue to stir, obtain modified good mud;
(3) pour in magnetic water extracter after modified good mud described in step (2) being left standstill 20 ~ 45 minutes and dewater, 5 ~ 15min, 60r/min ~ 120r/min, water extracter adsorbs mud by magnetic action, discharges clear water.Measure described mud respectively and leave standstill 20 minutes, 25 minutes, 30 minutes, 35 minutes, 40 minutes, the water ratio after 45 minutes.
Embodiment 3
(1) prepare described magnetic dewatering agent 80Kg, wherein, each component concentration of described magnetic dewatering agent is as follows: acrylamide 12Kg, chitin 8Kg, iron(ic) chloride 16Kg, sodium-chlor 12Kg, aluminum chloride 17.6Kg, vitriol oil 4Kg, iron powder 10.4Kg, places the described vitriol oil separately, stand-by; Pour described acrylamide, chitin, iron(ic) chloride, sodium-chlor, aluminum chloride, iron powder into beaker after mixing by described weight, in beaker, add clear water, described in add clear water and mixture volume ratio be: 1:1.The water-bath of then beaker being put into boiling is heated, until all moisture evaporations completely, takes out mixture and is ground powdered;
(2) the pending mud that 1 ton of water ratio is 80% is got, in mud, first add the powder after mixing grinding described in step (1), stir, and then in mud, add the vitriol oil of weight described in step (1), continue to stir, obtain modified good mud;
(3) pour in magnetic water extracter after modified good mud described in step (2) being left standstill 20 ~ 45 minutes and dewater, 5 ~ 15min, 60r/min ~ 120r/min, water extracter adsorbs mud by magnetic action, discharges clear water.Measure described mud respectively and leave standstill 20 minutes, 25 minutes, 30 minutes, 35 minutes, 40 minutes, the water ratio after 45 minutes.
Embodiment 4
(1) prepare described magnetic dewatering agent 100Kg, wherein, each component concentration of described magnetic dewatering agent is as follows: acrylamide 10Kg, chitin 16Kg, iron(ic) chloride 14Kg, sodium-chlor 10Kg, aluminum chloride 16Kg, vitriol oil 2Kg, iron powder 32Kg, places the described vitriol oil separately, stand-by; Pour described acrylamide, chitin, iron(ic) chloride, sodium-chlor, aluminum chloride, iron powder into beaker after mixing by described weight, in beaker, add clear water, described in add clear water and mixture volume ratio be: 1:1.The water-bath of then beaker being put into boiling is heated, until all moisture evaporations completely, takes out mixture and is ground powdered;
(2) the pending mud that 1 ton of water ratio is 90% is got, in mud, first add the powder after mixing grinding described in step (1), stir, and then in mud, add the vitriol oil of weight described in step (1), continue to stir, obtain modified good mud;
(3) pour in magnetic water extracter after modified good mud described in step (2) being left standstill 20 ~ 45 minutes and dewater, 5 ~ 15min, 60r/min ~ 120r/min, water extracter adsorbs mud by magnetic action, discharges clear water.Measure described mud respectively and leave standstill 20 minutes, 25 minutes, 30 minutes, 35 minutes, 40 minutes, the water ratio after 45 minutes.
Embodiment 5
(1) prepare described magnetic dewatering agent 100Kg, wherein, each component concentration of described magnetic dewatering agent is as follows: acrylamide 14Kg, chitin 10Kg, iron(ic) chloride 20Kg, sodium-chlor 15Kg, aluminum chloride 20Kg, vitriol oil 5Kg, iron powder 16Kg, places the described vitriol oil separately, stand-by; Pour described acrylamide, chitin, iron(ic) chloride, sodium-chlor, aluminum chloride, iron powder into beaker after mixing by described weight, in beaker, add clear water, described in add clear water and mixture volume ratio be: 1:1.The water-bath of then beaker being put into boiling is heated, until all moisture evaporations completely, takes out mixture and is ground powdered;
(2) the pending mud that 1 ton of water ratio is 99% is got, in mud, first add the powder after mixing grinding described in step (1), stir, and then in mud, add the vitriol oil of weight described in step (1), continue to stir, obtain modified good mud;
(3) pour in magnetic water extracter after modified good mud described in step (2) being left standstill 20 ~ 45 minutes and dewater, 5 ~ 15min, 60r/min ~ 120r/min, water extracter adsorbs mud by magnetic action, discharges clear water.Measure described mud respectively and leave standstill 20 minutes, 25 minutes, 30 minutes, 35 minutes, 40 minutes, the water ratio after 45 minutes.
Table 1 water cut test result
Claims (2)
1. a magnetic dewatering agent, is characterized in that: as following weight percent each becomes to be grouped into for described its component of magnetic dewatering agent and content:
Wherein, the described vitriol oil is placed separately, join in mud in use again.
2. a method for magnetic dewatering agent deep dehydration according to claim 1, comprises the steps:
(1) described magnetic dewatering agent is prepared, wherein, described magnetic dewatering agent is made up of each component of following weight percent content: acrylamide content is 9 ~ 19% of described dewatering agent total amount, chitin content is 7 ~ 17% of described dewatering agent total amount, iron(ic) chloride content is 14 ~ 21% of described dewatering agent total amount, sodium chloride content is 10 ~ 17% of described dewatering agent total amount, aluminum chloride content is 15 ~ 22% of described dewatering agent total amount, vitriol oil content is 1 ~ 8% of described dewatering agent total amount, iron content is 15 ~ 32% of described dewatering agent total amount, the described vitriol oil is placed separately, stand-by, described acrylamide, chitin, iron(ic) chloride, sodium-chlor, aluminum chloride, iron powder is poured into beaker after mixing by described content, 1:1 clear water is added in beaker, the water-bath of then beaker being put into boiling is heated, until all moisture evaporations completely, take out mixture and ground powdered,
(2) the pending mud that water ratio is 60 ~ 99% is got, the powder after mixing grinding described in step (1) is first added in mud, stir, and then in mud, add the vitriol oil of weight described in step (1), continue to stir, obtain modified good mud, wherein, the consumption of described dewatering agent is 5 ~ 10% of mud weight;
(3) dehydrating operation 5 ~ 15min in magnetic water extracter is poured into after modified good mud described in step (2) being left standstill 20 ~ 45 minutes, 60r/min ~ 120r/min, water extracter adsorbs mud by magnetic action, discharge clear water, measure described mud respectively and leaving standstill 20 minutes, 25 minutes, 30 minutes, 35 minutes, 40 minutes, the water ratio after 45 minutes.
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106316069A (en) * | 2016-08-24 | 2017-01-11 | 宁波鑫涌环保技术有限公司 | Efficient slurry dehydrating agent |
| CN108048106A (en) * | 2017-12-15 | 2018-05-18 | 苏州纳贝通环境科技有限公司 | One kind efficiently goes saline and alkaline retaining soil moisture modifying agent and preparation method and application |
| CN109081552B (en) * | 2018-08-22 | 2021-03-16 | 深圳大学 | Preparation method and application of inorganic-organic composite sludge conditioner |
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| CN103011549A (en) * | 2013-01-14 | 2013-04-03 | 杭州万得斯环保科技有限公司 | Efficient inorganic environment-friendly conditioner for deep dewatering of sludge |
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- 2014-05-28 CN CN201410230325.9A patent/CN104016567B/en not_active Expired - Fee Related
Patent Citations (8)
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| JPS52148963A (en) * | 1976-06-04 | 1977-12-10 | Inoue Japax Res Inc | Solid-liquid separating method and apparatus therefor |
| JPS59160599A (en) * | 1983-03-01 | 1984-09-11 | Kurita Water Ind Ltd | Process for dehydrating sludge |
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