CN102627342A - Magnetic powder flocculating agent and application method thereof - Google Patents
Magnetic powder flocculating agent and application method thereof Download PDFInfo
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- CN102627342A CN102627342A CN2012101159656A CN201210115965A CN102627342A CN 102627342 A CN102627342 A CN 102627342A CN 2012101159656 A CN2012101159656 A CN 2012101159656A CN 201210115965 A CN201210115965 A CN 201210115965A CN 102627342 A CN102627342 A CN 102627342A
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Abstract
The invention relates to a magnetic powder flocculating agent and an application method thereof. The magnetic powder flocculating agent consists of magnetic powder, clay powder and a flocculating agent, wherein the magnetic powder is spinel magnetic powder shown as MFe2O4; M refers to a metal element; the clay powder is any one or any combination of bentonite, montmorillonite, kaolin, zeolite and diatomite; and the flocculating agent is an inorganic flocculating agent, an organic flocculating agent or a combination thereof. The application method comprises the following steps of: uniformly dispersing the flocculating agent into an aqueous solution to be treated; adjusting the pH value with an acid or alkali; and after a solid is agglomerated, separating floccules from purified water by using a magnetic device.
Description
Technical field
The present invention relates to sewage disposal technology, particularly a kind of magnetic powder flocculation agent and application method thereof.
Background technology
Through in flocculation agent, adding magnetic powder, utilize the isolating method of magnetism of magnetite to have a variety of.
Japanese patent publication is in clear 57-135091 (1982): separate the method for utilizing active sludge again through in active sludge, adding magnetic powder.But use range only limits to active sludge, does not possess versatility.
In addition; Japanese patent publication is in flat 10-165712: it is staple that a kind of fine-powder with aluminum oxide and lime carbonate is arranged; Add the fine-powder flocculation agent of 20% magnetic substance, the adsorbable dirt of the aluminum oxide of its staple and calcium carbonate powders surface, but the bad dispersibility in water; Only the solution that contains below the pollution 10PMM is had Water purification, the use range limitation is big.
Also have: among the Japanese Patent W02008/105521: a method of using polyamino acid based flocculating agent and magnetic powder to purify waste water is arranged.Magnetic powder condenses through the polyamino acid based flocculating agent, and special processing will be carried out in the surface of its magnetic powder, and the cost of this flocculation agent moity is higher.And, must add organic polymer coargulator in the flocculation agent, can only be used for biological sewage and handle or the like.The method that do not have that a kind of cost is low, use range is wide, can purify water well.
Summary of the invention
The objective of the invention is to overcome the prior art defective, a kind of magnetic powder flocculation agent and application method thereof are provided.
The present invention realizes according to following proposal:
A magnetic powder flocculant, consists of three components: magnetic powder, clay powder, flocculants; wherein the magnetic powder is a kind of chemical general formula? MFe
2 O
4 spinel represented by magnetic powder, the above formula, M represents a metal element, clay powder, bentonite, montmorillonite, kaolin, zeolite, diatomaceous earth or any combination of a ; flocculating agent is an inorganic, organic flocculant, or a combination of both;
Above-mentioned inorganic flocculating agent is a kind of or its combination in Poly aluminum Chloride (PAC), Tai-Ace S 150, potassium alum, tschermigite, iron alum, bodied ferric sulfate, the poly-ferric chloride.
Above-mentioned organic floculant is Dyhard RU 100 formaldehyde condensation products, polyacrylamide, gather a kind of or combination in aminoacrylic acid class, sodium-alginate, Xylo-Mucine, the cationic cellulose class;
Above-mentioned MFe
2O
4In M refer to Fe, Co, Mn, Ni, Zn, Cr, Cu, Mg, Sn, Ca or Cd are wherein a kind of;
The weight proportion of above-mentioned three kinds of components, in 100 parts of clay powders, magnetic powder is 5-100 part, flocculation agent is 20-200 part;
Said flocculation agent evenly spreads in the pending aqueous solution, with acid or alkali adjustment pH value, treat that solid substance condenses after, through magnetic means throw out is separated with purifying waste water;
Above-mentioned magnetic means is electromagnet or lodstone;
The scope of above-mentioned pH value is decided according to the situation of pending water, generally is controlled at pH5.8-8.6.
Many fields all need be through the impurity in the sewage of flocculation agent place to go, like the WWT of industries such as chemical industry, livestock industry, dyeing industry, and the rivers and lakes and the water purifying treatment etc. of piping facility up and down.The sewage that generally contains inorganic components uses inorganic flocculation agent, and the sewage that contains organic composition uses and contains the organic macromolecule flocculation agent.To select flocculation agent for use according to the difference of water quality.In addition; The throw out that deposition forms needs large-area settling bath throw out taking-up from settling bath to be needed the continuous filtration equipment, plate-and-frame filter press, band filter etc. of Barrate type; Also want filter cloth replacing, vacuum pump running management or the like; The running management cost is very high, and thus, the lower more practical treatment process of a kind of cost is expected in market.
The present invention can handle various sewage through using magnetic flocculant; To contain the throw out that is magnetic agglomerates to together; Attract to reduce the usable floor area of settling bath through magnetite, and, be a kind of purified water processing method that reduces the running management cost with the magnetism isolation of purified water and the throw out of magnetite.
The present invention finds after the research prior art; In flocculation process, only put into clay material with colloidal nature after, Magnaglo could well evenly disperse; Pollution, clay and Magnaglo flocculating result are more obvious with magnetic material and flocculant than simple.
Embodiment
The selection of magnetic powder: required magnetic powder among the present invention so long as can be used by the powder that magnetite attracts, does not need special surface treatment.For example: metal-powder such as iron, nickel or its powdered alloy etc., molecular formula is Fe
3O
4Spinel type ferrite powder or the like, magnetic powder not only can use a kind of separately, can also several mix and use.
Make simply, cost is low, the spinel type ferrite powder that the thing source is many, and M wherein is Fe, Co, Mn, Ni, Zn, Cr, Cu, Mg, Sn, Ca or Cd are wherein a kind of, have good magnetic, and be very suitable.
Magnetic powder is more carefully good more; Particle diameter reaches more than 90% and can use through the powder of 50 eye mesh screens; Particle diameter reaches can be better through the powder of 100 eye mesh screens more than 90%, and preferably particle diameter reaches the powder that can pass through 200 eye mesh screens more than 90% certainly;
The selection of clay powders: clay powders preferably has the powder of colloidal nature, and this powder is distributed in the water, put 1 hour silently after, just can see that powder separates with water fully, be powder below, be above the clarification liquid.
About this powder are: bentonite, montmorillonite, kaolin, zeolite, diatomaceous earth, or synthetic zeolite, silica gel, activated clay, etc., in which large surface area, strong adsorption of a bentonite, montmorillonite, attapulgite, etc.; Price low, there is a wide provenance bentonite; clay powder finer the better, the particle size reached? 90% through? 50 mesh powder can be used, particle size reached? 90% through? 100 mesh screen Powder better recommended particle diameter? 90% by? 200 mesh powder;
About flocculation agent, conventional purposes, general kind can be used.But biological chemistry oxygen required amount (BOD), chemical oxidation required amount aspect and the aspect that reduces cost from reduce the aqueous solution consider that inorganic flocculating agent is best.Flocculate when insufficient at inorganic flocculating agent, also can use organic polymer coargulator.Inorganic flocculating agent and organic floculant can use simultaneously.
Inorganic flocculating agent has: Poly aluminum Chloride (PAC) (being called for short PAC), Tai-Ace S 150, potassium alum, iron alum, tschermigite, iron protochloride etc., organic floculant has: sodium-alginate, Xylo-Mucine, SEPIGEL 305 are the amino polyacrylic ester of polymer, band, Dyhard RU 100 formaldehyde condensation products flocculation agent etc.
Consider from treatment effect, cost aspect, best with PAC or Tai-Ace S 150; When handling the dyeing trade waste, contain PAC, the inorganic flocculating agent of Tai-Ace S 150 can not fully decolour sometimes, at this moment, adds SEPIGEL 305 again and be polymer, perhaps, behind the Dyhard RU 100 formaldehyde condensation products flocculation agent, can effectively decolour.So when handling this liquid, can directly in the flocculation agent composition, append SEPIGEL 305 is polymer or Dyhard RU 100 formaldehyde condensation products flocculation agent.
The component proportions of magnetic flocculant is by weight: if clay heavily is 100 parts, then magnetic powder should be between 5-100 part.If be less than 5 parts, receive a little less than the magnetism of magnetite, need electromagnet with strong gravity; Ratio surpasses 100 parts, and the magnetic powder bad dispersibility need be carried out special processing to the magnetic powder surface and increase dispersiveness, increase expense.Ratio is good between 10-60 part, it would be desirable between 20-40 part.
The addition of flocculation agent does not have special stipulation, and scope is 20-200 part usually.If be less than 20 parts, it is insufficient then to flocculate, and as surpassing 200 parts, then the residual quantity of flocculation agent increases in the aqueous solution, and clay component reduces comparatively speaking, and the removal ability of water soluble organic substance reduces.Optimal ratio is between the 50-150.
Flocculation agent can be water-soluble, do not have special stipulation for particle diameter, and the ideal particle diameter is can be through the powder of 50 eye mesh screens more than 90%.
Application method: with magnetic powder, clay powders and 3 kinds of compositions of flocculation agent add one by one in the entry use also can, but, before using 3 kinds of compositions are mixed because of troublesome poeration, re-use to good after processing flocculation agent.
Blending means has: 3 kinds of compositions are mixed with dryness, use with powder morphology.3 kinds of compositions are put in the water, use with muddy liquid form and also can.The flocculation agent of processing with dryness can prolonged preservation, when dropping into solid form, can in treatment solution, disperse as early as possible for making it, pays particular attention to observation.In addition, produce flocculating effect as early as possible, need to stir for a long time for making.And liquid flocculant, because of it contains moisture, the effective constituent of flocculation is less comparatively speaking, after the prolonged preservation; Be prone to perhaps be easy to solidify, will note during use observing, after liquid flocculant is put in the treatment solution with water sepn; Homodisperse just can flocculate after the short period of time stirring at once, and is easy to use.Concrete which kind of flocculation agent that uses is decided by physical device and operability.
When mixing, can use conventional hybrid machine with dryness.Such as: three-dimensional mixer, bipyramid rotary mixing machine, V-Mixer etc., perhaps can use kibbler, mix while pulverizing.Save in advance with clay powders and magnetic substance blended operation.The pulverizing machine has: ball mill, superfine grinding are with impact grinding etc.
During wet mixing, use the stainless steel reaction groove that has paddle, do not limit model.At first put into water, put into flocculation agent while stirring, perhaps earlier flocculation agent be distributed to water, and then progressively add clay powders, add magnetic powder at last again.The concentration requirement of liquid be controlled at can flow smooth and easy, do not influence and be used for principle.Solids component in the liquid is controlled between the 5%-50% (W), and ideal concentration is between the 20-40% (W).
Usage quantity and condition about flocculation agent: do test at first earlier, suitably confirm again according to the result.Sometimes,, need to make weakly acidic big flocculation agent, perhaps weakly alkaline big flocculation agent etc. according to the difference of fouling product character.Before making, need to confirm suitable addition, best pH value, and definite these numerical value need be tested in advance, confirm operating condition.PH value will be controlled near the following water ph value scope of discharging, and the ideal pH value of operation is PH4-11, is best with pH5.8-8.6.
In treatment solution, add flocculation agent, uniform mixing, restir adds acid or alkaline solution, stops to stir after transferring to best pH value, waits for the throw out deposition.
When using the solid flocculation agent, after adding flocculation agent, stir more than 30 minutes, flocculation agent can evenly be mixed with sewage, treat that clay powders adsorbs fully that the re-adjustment pH value is good behind the fouling product.When using liquid flocculant, flocculation agent behind the homodisperse, just can be regulated the pH value at once in treatment solution.
The usage quantity of the bronsted lowry acids and bases bronsted lowry that adds when regulating the pH value: generally the proportion with the clay component in the flocculation agent is foundation, should be controlled between 20 ~ 2000PPM.Acid solution: organic acid, mineral acid can use, and are good with dilute sulphuric acid, Hydrogen chloride.Alkaline solution: can use liquid caustic soda, sodium carbonate solution or milk of lime etc., wherein the milk of lime cost is low, and can make flocculation agent and polymer bridge formation because of it, and is ideal.
Formed throw out has magnetic, can be adsorbed with by magnetite.Utilize magnetic force, can control sedimentation speed (accelerating or slow-down), thereby not need large-area settling tank; For example: adopt the roller that permanet magnet is housed to separate throw out and purify waste water.Perhaps, electromagnet is put in the water, the adsorption-flocculation thing, make its with purify waste water separate after, stop electromagnet work, remove intensive throw out.In the above-mentioned several method, all need not to use traditional plate-and-frame filter press, vacuum hydroextractor, belt filter press, whizzer etc.,, also can significantly reduce frequency of utilization, significantly reduce the operational administrative expense even will use.
Application example:
Magnetic powder is a spinel type ferrite powder; The sodium bentonite that wilkinite uses Linan, Zhejiang to produce, 200 order percent of pass 90%.Flocculation agent uses: PAC solution (AlCl
3Content quality meter 10%), Al
2(SO
4)
3(solid, Al
2(SO
4)
3,Content, quality meter 15.7%), DFA-101 efficient flocculant (Dyhard RU 100 formaldehyde condensation products, Xinping, Ningxia fine chemistry industry limited-liability company trade(brand)name, solid content 50%), anionic polyacrylamide.
Application example 2
Processing Paper Wastewater (Fuyang papermaking company sewage effluent)
Treatment agent configuration: get 100 parts of industrial aluminum sulphates, add an amount of water and fully stir, be configured to the solution of quality 5%, to wherein adding 100 parts of wilkinites and 30 fens Z 250s, fully stir again, place for use.
(COD is 608,40 times of colourities (extension rate, down together) to get the 100ml paper waste; PH value 6.8), add the above-mentioned treatment agent that configures of 2.5ml, fully stir 5min after; Leave standstill a moment, leaving away with the magnetite branch suspends and sedimentary flco, and obtaining COD is 252; Colourity is 10 settled solution, COD clearance 58.5%.
Application example 3
Treatment of dyeing and printing (Shaoxing printing and dyeing company workshop sewage effluent)
Treatment agent configuration: get 100 parts of industrial aluminum sulphates and 30 parts of PAC, add an amount of water and fully stir, be configured to the solution of quality 5% (industrial aluminum sulphate calculating), to wherein adding 100 parts of wilkinites and 50 parts of Z 250s, fully stir again, place for use.
Get 100ml dyeing waste water (COD is 1040,180 times of colourities, pH value 11.2), earlier with sulfuric acid or salt acid for adjusting pH value to 8.1; Add the above-mentioned treatment agent that configures of 1.5ml then, fully stir 5min after, add the DFA-101 of 0.3ml concentration 2% again; After fully stirring 5min, the anionic polyacrylamide that adds trace leaves standstill a moment to help sedimentation; Leaving away with the magnetite branch suspends and sedimentary flco, and obtaining COD is 240, and colourity is 8; The pH value is 7.2 settled solution, COD clearance 77%, percent of decolourization 96%.
Application example 4
Handle sanitary wastewater (Xiaoshan sewage treatment plant inflow mouth)
Treatment agent configuration: get 100 parts of PAC, add an amount of water and fully stir, be configured to the solution of quality 5%, to wherein adding 100 parts of wilkinites and 30 parts of Z 250s, fully stir again, place for use.
Get 100ml sanitary wastewater (COD is 220,18 times of colourities, pH value 7.5), add the above-mentioned treatment agent that configures of 1.5ml; After fully stirring 5min, the anionic polyacrylamide that adds trace again leaves standstill a moment to help sedimentation; Leaving away with the magnetite branch suspends and sedimentary flco, and obtaining COD is 80, and colourity is 4; The pH value is 6.8 settled solution, COD clearance 64%, percent of decolourization 78%.
Claims (8)
1? A magnetic powder flocculant, consists of three components: magnetic powder, clay powder, flocculants; wherein the magnetic powder is a kind of chemical general formula? MFe
2 O
4 spinel represented by magnetic powder, the above formula, M represents a metal element; powder bentonite clays, montmorillonite, kaolin, zeolite, diatomaceous earth, one or any combination thereof; flocculating agent is an inorganic, organic or a combination of flocculants.
2. magnetic powder flocculation agent as claimed in claim 1 is characterized in that above-mentioned inorganic flocculating agent is a kind of or its combination in Poly aluminum Chloride (PAC), Tai-Ace S 150, potassium alum, tschermigite, iron alum, bodied ferric sulfate, the poly-ferric chloride.
3. magnetic powder flocculation agent as claimed in claim 1 is characterized in that above-mentioned organic floculant is Dyhard RU 100 formaldehyde condensation products, polyacrylamide, gathers a kind of in aminoacrylic acid class, sodium-alginate, the cationic cellulose class or combination.
4. magnetic powder flocculation agent as claimed in claim 1 is characterized in that above-mentioned MFe
2O
4In M refer to Fe, Co, Mn, Ni, Zn, Cr, Cu, Mg, Sn, Ca or Cd are wherein a kind of.
5. magnetic powder flocculation agent as claimed in claim 1 is characterized in that the weight proportion of above-mentioned three kinds of components, and in 100 parts of clay powders, magnetic powder is 5-100 part, and flocculation agent is 20-200 part.
6. the application method of magnetic powder flocculation agent as claimed in claim 1 is that said flocculation agent is evenly spread in the pending aqueous solution, with acid or alkali adjustment pH value, treat that solid substance condenses after, through magnetic means throw out is separated with purifying waste water.
7. method as claimed in claim 5 is characterized in that above-mentioned magnetic means is electromagnet or lodstone.
8. method as claimed in claim 5 is characterized in that the scope of above-mentioned pH value is decided according to the situation of pending water, generally is controlled at pH5.8-8.6.
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| CN103159309A (en) * | 2013-04-15 | 2013-06-19 | 池州灵芝化建材料科技有限公司 | Preparation method of flocculating agent |
| CN105056907A (en) * | 2015-07-24 | 2015-11-18 | 安徽雪城超细碳酸钙有限公司 | Magnetic composite modified bentonite and preparation method thereof |
| CN105347423A (en) * | 2015-10-14 | 2016-02-24 | 李东 | Organic nanometer water treatment agent and method for treating sewage with sewage treatment agent |
| CN106630057A (en) * | 2016-12-14 | 2017-05-10 | 安徽吉思特智能装备有限公司 | Fly ash composite polyferric sulfate flocculating agent and preparation method thereof |
| CN106630059A (en) * | 2016-12-14 | 2017-05-10 | 安徽吉思特智能装备有限公司 | Magnetic powder composite polyferric sulfate flocculating agent and preparation method thereof |
| CN106925207A (en) * | 2017-03-13 | 2017-07-07 | 安徽皖翔电力设备有限公司 | A kind of transformer deteriorates oil adsorbent |
| CN108658197A (en) * | 2018-06-28 | 2018-10-16 | 芜湖市棠华建材科技有限公司 | Inorganic-organic composite flocculating agent |
| CN109319872A (en) * | 2018-10-29 | 2019-02-12 | 浙江海洋大学 | A kind of industrial sewage treating agent and preparation method thereof |
| CN109455776A (en) * | 2018-11-14 | 2019-03-12 | 陈云 | A kind of sewage scavenging material and preparation method thereof |
| CN110156121A (en) * | 2018-03-27 | 2019-08-23 | 新疆水处理工程技术研究中心有限公司 | A kind of high efficiency composition magnetic flocculant and preparation method thereof |
| CN110282715A (en) * | 2019-07-16 | 2019-09-27 | 闽江学院 | A kind of preparation and application of polyquaternium In-situ reaction improved PFS |
| CN111592084A (en) * | 2020-06-02 | 2020-08-28 | 中国电建集团成都勘测设计研究院有限公司 | Magnetic powder modified polyferric chloride coagulant and preparation method thereof |
| CN112624726A (en) * | 2020-12-03 | 2021-04-09 | 嘉兴沃特泰科环保科技股份有限公司 | Liquid mixed chelating agent for hazardous waste landfill standard and preparation method thereof |
| CN117049682A (en) * | 2023-10-12 | 2023-11-14 | 杭州尚善若水环保科技有限公司 | Composite flocculant and application thereof in dye wastewater treatment |
| CN117509859A (en) * | 2024-01-05 | 2024-02-06 | 北京东雷恒业环保科技有限公司 | Reinforced magnetic precipitation pretreatment method for steel wastewater treatment agent and steel wastewater |
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|---|---|---|---|---|
| CN103159309A (en) * | 2013-04-15 | 2013-06-19 | 池州灵芝化建材料科技有限公司 | Preparation method of flocculating agent |
| CN105056907A (en) * | 2015-07-24 | 2015-11-18 | 安徽雪城超细碳酸钙有限公司 | Magnetic composite modified bentonite and preparation method thereof |
| CN105347423A (en) * | 2015-10-14 | 2016-02-24 | 李东 | Organic nanometer water treatment agent and method for treating sewage with sewage treatment agent |
| CN106630057A (en) * | 2016-12-14 | 2017-05-10 | 安徽吉思特智能装备有限公司 | Fly ash composite polyferric sulfate flocculating agent and preparation method thereof |
| CN106630059A (en) * | 2016-12-14 | 2017-05-10 | 安徽吉思特智能装备有限公司 | Magnetic powder composite polyferric sulfate flocculating agent and preparation method thereof |
| CN106925207A (en) * | 2017-03-13 | 2017-07-07 | 安徽皖翔电力设备有限公司 | A kind of transformer deteriorates oil adsorbent |
| CN110156121A (en) * | 2018-03-27 | 2019-08-23 | 新疆水处理工程技术研究中心有限公司 | A kind of high efficiency composition magnetic flocculant and preparation method thereof |
| CN108658197A (en) * | 2018-06-28 | 2018-10-16 | 芜湖市棠华建材科技有限公司 | Inorganic-organic composite flocculating agent |
| CN109319872A (en) * | 2018-10-29 | 2019-02-12 | 浙江海洋大学 | A kind of industrial sewage treating agent and preparation method thereof |
| CN109455776A (en) * | 2018-11-14 | 2019-03-12 | 陈云 | A kind of sewage scavenging material and preparation method thereof |
| CN110282715A (en) * | 2019-07-16 | 2019-09-27 | 闽江学院 | A kind of preparation and application of polyquaternium In-situ reaction improved PFS |
| CN110282715B (en) * | 2019-07-16 | 2021-08-31 | 闽江学院 | Preparation and application of polyquaternium in-situ composite modified polymeric ferric sulfate |
| CN111592084A (en) * | 2020-06-02 | 2020-08-28 | 中国电建集团成都勘测设计研究院有限公司 | Magnetic powder modified polyferric chloride coagulant and preparation method thereof |
| CN112624726A (en) * | 2020-12-03 | 2021-04-09 | 嘉兴沃特泰科环保科技股份有限公司 | Liquid mixed chelating agent for hazardous waste landfill standard and preparation method thereof |
| CN117049682A (en) * | 2023-10-12 | 2023-11-14 | 杭州尚善若水环保科技有限公司 | Composite flocculant and application thereof in dye wastewater treatment |
| CN117049682B (en) * | 2023-10-12 | 2024-01-23 | 杭州尚善若水环保科技有限公司 | Composite flocculant and application thereof in dye wastewater treatment |
| CN117509859A (en) * | 2024-01-05 | 2024-02-06 | 北京东雷恒业环保科技有限公司 | Reinforced magnetic precipitation pretreatment method for steel wastewater treatment agent and steel wastewater |
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