CN101306343B - Method for preparing water body dephosphorized granule adsorbent using attapulgite clay - Google Patents
Method for preparing water body dephosphorized granule adsorbent using attapulgite clay Download PDFInfo
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- CN101306343B CN101306343B CN2007101352243A CN200710135224A CN101306343B CN 101306343 B CN101306343 B CN 101306343B CN 2007101352243 A CN2007101352243 A CN 2007101352243A CN 200710135224 A CN200710135224 A CN 200710135224A CN 101306343 B CN101306343 B CN 101306343B
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- clay rod
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
The invention provides a method which is used for preparing water phosphorus removal granular adsorbent by utilizing attapulgite clay. The invention is characterized in that the attapulgite clay is taken as the raw material, and water is added for stirring after roughing, grinding and screening are carried out to the attapulgite clay; the uniformly mixed material is granulated and casted by a mold on a high-pressure densifier, the formed granules are screened, then the screened granules are positioned into a high temperature electric furnace for baking, and then the finished product of the water phosphorus removal granular adsorbent is prepared by naturally cooling to the room temperature. The invention does not need aid activation or other chemical processes for modification, and can prepare the high efficient granular adsorbent through simple granulation and baking, the processing technique is simple, the production cost is low, and harmful gas and wastewater are not produced during the production process. The product has specificity and high affinity to the water phosphorus, the adsorption efficiency is high, no toxicity is produced to waters as well as aquatic organisms, and the removal from the waters after the use is convenient.
Description
One, technical field
The water that the invention belongs in the environmental protection field pollutes treatment technology, particularly a kind of method of utilizing Concave-convex clay rod to prepare water body dephosphorized granule adsorbent.
Two, background technology
Prior art: the sanitary sewage, industrial wastewater and the agricultural run-off that are rich in nitrogen phosphorus in a large number enter rivers,lakes and seas, all can cause the eutrophication of water body, studies show that phosphorus is the key factor of body eutrophication.Therefore, the content that effectively reduces phosphorus in the water body has become the important channel of control body eutrophication.Water body dephosphorized method commonly used both at home and abroad at present has bioanalysis, chemical method, physics method.Bioanalysis mainly comprises biological assimilation absorption process and enhanced biological phosphorus removal method (EBPR).Chemical method mainly comprises calcium, aluminium, the phosphorus precipitation method and physical and chemical adsorption method.The physics method mainly comprises mechanical filter and membrane filter method.Wherein the physical and chemical adsorption method has advantages such as treatment effect is good, floor space is little, technology is simple, easy to operate, receives much concern in the purified treatment of phosphorus polluted-water.Clay mineral is the nonmetal mineral reserve resource of a class that occurring in nature extensively distributes, advantage such as have that specific area is big, hole is many and polarity is strong, special colloidal property and crystal structure make it possess good surperficial absorption property and ion-exchange performance again, therefore, clay mineral becomes new and effective sorbing material hot of research and development gradually.It is the method for feedstock production efficient dephosphorization adsorbent with rare earth and clay that patent documentation CN 200610010635.5 discloses a kind of, and production process comprises batching, granulation, acid activation, alkali activation, drying, twice high-temperature roasting etc., and the production cycle is longer.Patent documentation CN 200510014769.X discloses a kind of preparation method of phosphate radical adsorber, with modifier such as inorganic mineral materials such as Concave-convex clay rod, natural zeolite, wollastonite, diatomite and ferric trichloride, magnesium chloride, zirconium oxychloride, alchlors is raw material, mix, react, and under alkali condition, precipitate, then to sediment filter, high-temperature process, obtain porous prilled efficient dephosphorization adsorbent product.In addition, patent documentation CN 200410041493.X discloses a kind of concavo-convex excellent sewage-treating agent and production method, will dry after the Concave-convex clay rod acidification, then adds alum and modified starch is milled jointly, obtains the powdery flocculant.Patent documentation CN 200410041078.4 discloses a kind of concave-convex rod particle absorption filter agent and production method, will dry after the Concave-convex clay rod acidification, adds then that rice husk is milled jointly, granulation and roasting.Patent documentation CN 200610040712.1 discloses a kind of natural-minerals adsorptive filter medium, and raw materials such as the zeolite after the acidifying, Concave-convex clay rod, bentonite, diatomite, volcanic rock, alumine are mixed by certain prescription, and pulverizing, screening form.Patent documentation CN 200610085622.4 discloses a kind of production method of baking natural-minerals adsorptive filter medium, raw materials such as the zeolite after the acidifying, Concave-convex clay rod, bentonite, diatomite, volcanic rock, alumine are mixed by certain prescription, in extruder, be squeezed into sheet, then dry, pulverizing, roasting.But above-mentioned patent is not at water body dephosphorized and design, and technology is loaded down with trivial details, the production cost height.
Three, summary of the invention
Technical problem: the present invention is directed to above-mentioned technical problem, provide a kind of production technology simple, low production cost, and production process does not have the Concave-convex clay rod that utilizes that pernicious gas and sewage produces and prepares the method for water body dephosphorized granule adsorbent.
Technical scheme: technical solution of the present invention is: a kind of method of utilizing Concave-convex clay rod to prepare water body dephosphorized granule adsorbent is characterized in that preparation process is:
A. be raw material with the Concave-convex clay rod, this Concave-convex clay rod is roughly selected;
B. raw material is pulverized, the concave and convex rod stone powder after the pulverizing is sieved;
C. the concave and convex rod stone powder after above-mentioned the sieving is changed in the agitator, and add certain moisture, stir;
D. the material that stirs mould granulation casting mold, and sieve to obtain moulding material, residual powder returns agitator;
E. will go up the one-step forming particle and place roasting in the electric furnace, reduce to room temperature more naturally, make required water body dephosphorized granule adsorbent.
Among the step a, in the Concave-convex clay rod after roughly selecting palygorskite and dolomite content all 〉=20%, Al in its chemical constituent
2O
3〉=4%, Fe
2O
3〉=2%, CaO and MgO are all 〉=10%.Among the step b, the raw material of selecting fineness 200～400 orders after crushed, moisture≤15%.Among the step c, add the moisture of powder quality 15～20%.In the steps d, mould diameter scope 4～8mm, the crushing strength of casting mold process is 22N/cm
2, selected slot size and mould match.Among the step e, sintering temperature is 600～900 ℃, keeps 20～60 minutes.
Beneficial effect: the present invention is a raw material with the natural attapulgite clay of special component, do not need acid activation or other chemical method modification, only prepare efficient water dephosphorization granule adsorbent by simple granulation and roasting, production technology is simple, low production cost, and production process does not have pernicious gas and sewage produces.Its product has selectivity and height affinity to water systems'phosphorus, and the adsorption efficiency height can not produce murder by poisoning to water body and aquatile, and be convenient to shift out from water body after using.Therefore, the present invention has broad applicability low-phosphorous aspect water body dephosphorized, can be used for the dephosphorization of waterworks, city appearance water body, golf course water body, agricultural run-off, sewage treatment plant and other natural water.
Four, description of drawings
Fig. 1 is a technological process schematic block diagram of the present invention;
Fig. 2 is the water body dephosphorized granule adsorbent finished product outward appearance photo of different-grain diameter;
Fig. 3 is the photo of high pressure comminutor and granulation mould;
Fig. 4 is different-grain diameter and the sintering temperature influence curve to the water body dephosphorized granule adsorbent absorption property.
Five, the specific embodiment
The present invention is further described below in conjunction with drawings and Examples.
As can be seen, concrete steps of the present invention are as follows from accompanying drawing:
1. the screening of Concave-convex clay rod
Through roughly selecting, select needed raw material after the Concave-convex clay rod exploitation;
2. dry, pulverize
Concave-convex clay rod is dried, is crushed to the fineness of regulation;
3. add water, stirring
Change above-mentioned raw materials over to agitator, add suitable moisture, fully stir evenly;
4. extruding, granulation
The material that stirs is used the mould granulation of selected model and is sieved on the high pressure comminutor;
5. roasting
Shaped granule is placed roasting in the high-temperature electric resistance furnace, reduce to room temperature more naturally and can obtain finished product.
Following specific embodiment is to be raw material with Xuyi area Concave-convex clay rod, adopts method for preparing water body dephosphorized granule adsorbent and effect thereof.
Embodiment 1:
Concave-convex clay rod is selected from Xuyi Jiangsu Dragon King mountain, with raw material pulverizing to 200 order, gets the 10Kg powder and changes agitator over to, slowly progressively adds about 2L running water, stirs; Changing the material that stirs over to high pressure comminutor N155 (Nanjing University of Technology granulation machinery Research Institute production) goes up with the mould extruder grain of 8mm diameter and sieves; Shaped granule is placed in the muffle furnace 900 ℃ of left and right sides roastings 30 minutes, reduce to room temperature more naturally, make the water body dephosphorized granule adsorbent that diameter is 8mm.Take by weighing about above-mentioned preparation material 2.0g and place the 100mL centrifuge tube, add the simulated wastewater solution of the phosphorous 1mg/L of 50mL, do not stir, leave standstill under 25 ℃ ± 1 ℃ constant temperature and survey the supernatant phosphorus concentration after 1 hour, calculate the plain clearance of phosphorus.The result shows, reacts 1 hour, and water body dephosphorized granule adsorbent reaches about 90% the clearance of phosphorus.
Embodiment 2:
Concave-convex clay rod is selected from Xuyi Jiangsu harmony hill, with raw material pulverizing to 200 order, gets the 10Kg powder and changes agitator over to, slowly progressively adds about 2L running water, stirs; Change the material that stirs over to high pressure comminutor N155 and go up the mould granulation of using the 8mm diameter, and sieve; Shaped granule is placed in the muffle furnace 900 ℃ of left and right sides roastings 20 minutes, reduce to room temperature more naturally, make the water body dephosphorized granule adsorbent that diameter is 8mm.
Take by weighing about above-mentioned preparation material 2.0g and place the 100mL centrifuge tube, add the simulated wastewater solution of the phosphorous 1mg/L of 50mL, do not stir, leave standstill under 25 ℃ ± 1 ℃ constant temperature, survey the supernatant phosphorus concentration, calculate the plain clearance of phosphorus in the different time sampling.The result shows, clearance nearly 100% after granule adsorbent reaches 60%, 15 minute clearance clearance surpasses 90%, 24 hour after nearly 80%, 1 hour the clearance of phosphorus after 5 minutes.
Embodiment 3:
Concave-convex clay rod is selected from Xuyi Jiangsu Dragon King mountain, with raw material pulverizing to 200 order, gets the 10Kg powder and changes agitator over to, slowly progressively adds about 2L running water, stirs; Change the material that stirs over to high pressure comminutor N155 and go up the mould granulation of using the 8mm diameter, and sieve; Shaped granule is placed in the muffle furnace 600 ℃ of left and right sides roastings 60 minutes, reduce to room temperature more naturally, make the water body dephosphorized granule adsorbent that diameter is 8mm.
Take by weighing about above-mentioned preparation material 2.0g and place the 100mL centrifuge tube, add the livestock and poultry farm actual sewage of the phosphorous 24mg/L of 50mL, do not stir, leave standstill under 25 ℃ ± 1 ℃ constant temperature and survey the supernatant phosphorus concentration after 24 hours, calculate the plain clearance of phosphorus.The result shows that water body dephosphorized granule adsorbent reaches 61.5% to the clearance of phosphorus.
Embodiment 4:
Concave-convex clay rod is selected from Xuyi Jiangsu Dragon King mountain, in the raw material palygorskite and dolomite content all 〉=20%, Al in its chemical constituent
2O
3〉=4%, Fe
2O
3〉=2%, CaO and MgO are all 〉=10%.With raw material pulverizing to 400 order, moisture≤15% is got the 10Kg powder and is changed agitator over to, slowly progressively adds about 1.5L running water, stirs; Change the material that stirs over to high pressure comminutor N155 and go up the mould granulation of using the 4mm diameter, crushing strength 22N/cm
2, sieve; Shaped granule is placed in the muffle furnace 900 ℃ of left and right sides roastings 20 minutes, reduce to room temperature more naturally, make the water body dephosphorized granule adsorbent that diameter is 4mm.
Take by weighing about above-mentioned preparation material 2.0g and place the 100mL centrifuge tube, add the simulated wastewater solution of the phosphorous 1mg/L of 50mL, do not stir, leave standstill under 25 ℃ ± 1 ℃ constant temperature and survey the supernatant phosphorus concentration after 1 hour, calculate the plain clearance of phosphorus.The result shows, reacts 1 hour, and water body dephosphorized granule adsorbent reaches about 60% the clearance of phosphorus.
Claims (1)
1. method of utilizing Concave-convex clay rod to prepare water body dephosphorized granule adsorbent is characterized in that preparation process is:
A. be raw material with the Concave-convex clay rod, this Concave-convex clay rod roughly selected, in the Concave-convex clay rod after roughly selecting palygorskite and dolomite content all 〉=20%, Al in its chemical constituent
2O
3〉=4%, Fe
2O
3〉=2%, CaO and MgO are all 〉=10%;
B. the raw material after roughly selecting is pulverized, sieved, the raw material of selecting fineness 200～400 orders after crushed, moisture≤15%;
C. the concave and convex rod stone powder after above-mentioned the sieving is changed in the agitator, slowly progressively add the moisture of powder quality 15～20%, stir;
D. the material that stirs is with mould granulation casting mold and sieve; Mould diameter scope 4～8mm, the crushing strength of casting mold process is 22N/cm
2, selected slot size and mould match;
E. will go up the one-step forming particle and place roasting in the electric furnace, sintering temperature is 600～900 ℃, keeps 20～60 minutes, reduces to room temperature more naturally, makes required water body dephosphorized granule adsorbent.
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Cited By (1)
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| WO2019060361A1 (en) * | 2017-09-22 | 2019-03-28 | Honeywell International Inc. | Adsorbent granules for removal of heavy metals and method of making |
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| CN101757890B (en) * | 2010-02-05 | 2012-07-18 | 淮安金雨阳环保科技有限公司 | Preparation method of attapulgite filter material for selectively absorbing calcium ions and magnesium ions |
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| CN103301804A (en) * | 2013-07-08 | 2013-09-18 | 兰州理工大学 | Method for preparing hydrotalcite like compound/attapulgite composite material |
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| CN104876639A (en) * | 2015-05-13 | 2015-09-02 | 安徽建筑大学 | Porous phosphorus removal ceramisites and preparation method thereof |
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