CN107185481A - A kind of dephosphorization filler and preparation method thereof - Google Patents
A kind of dephosphorization filler and preparation method thereof Download PDFInfo
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- CN107185481A CN107185481A CN201710542894.0A CN201710542894A CN107185481A CN 107185481 A CN107185481 A CN 107185481A CN 201710542894 A CN201710542894 A CN 201710542894A CN 107185481 A CN107185481 A CN 107185481A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/12—Naturally occurring clays or bleaching earth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
- B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/42—Materials comprising a mixture of inorganic materials
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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Abstract
The invention discloses a kind of dephosphorization filler and preparation method thereof, its raw material includes 75~80 parts of bentonites, 10~15 parts of activated aluminas and 3~6 parts of adhesives according to mass parts.The dephosphorization filler of the present invention is modified by using activated alumina, adhesive and sulfuric acid to natural montmorillonite, so as to make, obtained modified alta-mud specific surface area is bigger, and porosity is stronger, with stronger adsorption effect, dephosphorization ability is strong, it is ensured that the high efficiency of dephosphorization.
Description
Technical field
The present invention relates to technical field of sewage, in particular to a kind of dephosphorization filler and preparation method thereof.
Background technology
With the continuous enhancing of mankind's activity, the nitrogen and phosphorus pollution of water body is increasingly serious, while national environmental protection policy requirements pair
Water outlet TP standard is more and more stricter, causes body eutrophication to prevent the nitrogen-phosphorus wastewater of superelevation.Therefore effectively reduction discharge is useless
The content of phosphorus is to turn into the important channel of preventing and treating body eutrophication in water.At present, the method for domestic and international dephosphorization mainly has chemistry
The precipitation method, absorption method, bioanalysis, filtration method etc..
Absorption method dephosphorization method be using adsorbent provide bigger serface, by phosphorus adsorbent surface attachment absorption,
Ion exchange or surface precipitation process, reach the effect of dephosphorization.And phosphor resource further can be reclaimed by desorption processing.At present
Be the relatively low sanitary sewage of pollution level to non-industrial wastewater, the technology such as manpower rapid-infiltration pond, biofilter, artificial swamp compared with
It is conventional, however, in such technology, topmost key problem is exactly the selection of matrix, its performance is directly connected to engineering and gone out
Whether water is up to standard.
Traditional dephosphorization filler mainly has natural clay quasi-mineral, industrial building discarded object, synthetic material.Dephosphorization
The demand of filler is than larger, and filler in the market has that adsorption efficiency is not high, and cost is high, absorption be easily saturated need it is frequent
Change, additionally, due to the unstable of composition of raw material so that absorption property is unstable, influence outlet effect.
The content of the invention
In view of this, a kind of dephosphorization filler that the present invention is provided and preparation method thereof, preferably overcomes above-mentioned existing skill
The problem of art is present and defect, not only preparation method is simple, and dephosphorization ability is strong.
A kind of dephosphorization filler, its raw material includes 75~80 parts of bentonites, 10~15 parts of activated aluminas and 3 according to mass parts
~6 parts of adhesives.
Further, the bentonite is natural montmorillonite；The bentonitic granularity is 200~300 mesh.
Further, the adhesive is one or both of sodium metasilicate, polyvinyl alcohol gluing agent.
A kind of preparation method of dephosphorization filler, comprises the following steps：
Bentonite, activated alumina, adhesive are added in acid solution and activated；
And it is to obtain modified alta-mud dephosphorization filler to bakee, cool down.
Further, the volume fraction of the acid solution is 3~7%.
Further, the activated alumina is modified activated alumina；Its modification procedure is specially：
Take activated alumina to be eluted with water, then filter, dried at 100~120 DEG C；
Dried activated alumina is added in the aluminum sulfate solution that concentration is 0.025~0.03mol/L, 20~25
Shaken and taken out after 3~4h with 110~130r/min vibration velocity at DEG C；
Cleaned repeatedly, dried after filtering at 100~120 DEG C with water again, 4~5h is then bakeed at 500~600 DEG C,
Obtain modified active aluminum oxide.
Further, the granularity of the modified activated aluminum oxide is 100~200 mesh.
Further, the activation process is carried out in 90 ± 2 DEG C of water bath, and with 50~70r/min vibration velocity
2~3h of concussion activation.
Further, after the activation, bakee before also include according to being washed successively by elder generation to rear order, mistake
Filter and dried at 100~120 DEG C.
Further, the stoving temperature is 500~700 DEG C, described to bake and bank up with earth the time for 2~2.5h.
Compared with prior art, the beneficial effect of a kind of modified alta-mud dephosphorization filler of the invention and preparation method thereof
It is：
(1), the present invention is modified using activated alumina, adhesive and sulfuric acid to natural montmorillonite, so as to make to obtain
Modified alta-mud specific surface area it is bigger, porosity is stronger, and with stronger adsorption effect, dephosphorization ability is strong, it is ensured that dephosphorization
High efficiency.
(2), raw material of the present invention reserves in nature are big, cheap and easy to get, it is possible to decrease production cost, and
Preparation method is simple.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly makees detailed
It is described as follows.
Embodiment
For the ease of understanding the present invention, technical scheme is elaborated with reference to the mode of embodiment,
Many details are elaborated in the following description to fully understand the present invention.
But the invention can be embodied in many other ways as described herein, those skilled in the art can be with
Similar improvement is done in the case of without prejudice to intension of the present invention, therefore the present invention is not limited to the specific embodiments disclosed below.
The invention provides a kind of dephosphorization filler, its raw material contains according to quality subpackage：
Natural montmorillonite：75~80 parts, such as 75 parts, 76 parts, 77 parts, 78 parts, 79 parts or 80 parts；
Modified activated aluminum oxide：10~15 parts, such as 10 parts, 11 parts, 12 parts, 13 parts, 14 parts or 15 parts；
Adhesive：3~6 parts or so, such as 3 parts, 4 parts, 5 parts or 6 parts.
Above-mentioned bentonite is the nonmetallic minerals using montmorillonite as main mineral constituent, and smectite structure is by two silica
Tetrahedron presss from both sides the 2 of one layer of alumina octahedral composition:1 type crystal structure, because the layer structure of montmorillonite structure cell formation has certain
A little cations, such as Cu, Mg, Na, K, and the effect of these cations and montmorillonite structure cell is very unstable, easily by other cations
Exchange, therefore with preferable ion exchangeable.
Above-mentioned bentonite is a kind of claystone, smectite clay rock, bentonite, bentonite or amargosite is also known as, often containing a small amount of
Illite, kaolinite, galapectite, chlorite, zeolite, quartz, feldspar, calcite etc.；It is generally white, faint yellow, because of iron content
Amount change is again in light gray, light green, pink, brown red, brick red, grey black etc.；Have wax-like, earthy or greasy luster.What bentonite had
Loose such as soil, what is also had is fine and close hard.Main chemical compositions are silica, alundum (Al2O3) and water, also containing iron, magnesium, calcium,
The elements such as sodium, potassium, Na2O and CaO content are quite big on bentonitic physicochemical properties and process technology performance influence.
Above-mentioned bentonite is preferably natural montmorillonite, and its reserves in nature is big, cheap and easy to get.And it is natural swollen
Profit soil have strong hygroscopicity and dilatancy, the water of adsorbable 8~15 times of own vols, volumetric expansion is up to several times to 30
Times；As a form of gel and suspension can be dispersed into aqueous medium, this medium solution has certain viscosity, thixotropy and lubrication
Property；There is stronger cation exchange capacity (CEC)；There are certain adsorption capacity, maximal absorptive capacity to various gases, liquid, organic substance
Up to 5 times of weight of itself；Its admixture with water, mud or fine sand has plasticity and cohesiveness.
Do not limited especially not harshly to the granularity work of bentonite in powder in the present invention, but in order that the preparation process of dephosphorization filler
Middle bentonite can select the bentonite that granularity is 200~300 mesh, such as its granularity is 200 preferably with other stock dispersions
Mesh, 210 mesh, 220 mesh, 250 mesh, 280 mesh, 290 mesh or 300 mesh.Herein it should be noted that mesh is measurement unit, refer to and often put down
Eyelet number on square inch screen, mesh number is higher, and granularity is smaller.100~200 mesh are scaled 74~165 microns.The present invention is right
Bentonitic density is not required especially, can use 2~3g/cm3。
Above-mentioned activated alumina, also known as activated bauxite, are specially referred to as " active oxidation using the usual of aluminum oxide in the catalyst
Aluminium ", it is a kind of porous, the solid material of high degree of dispersion, there is very big surface area, and its micropore surface possesses catalytic action institute
It is required that characteristic, such as absorption property, surface-active, excellent heat endurance, thus be widely used as chemical reaction urge
Agent and catalyst carrier.Spheric active aluminum oxide transformation oil adsorbent is white spherical porous particles, active oxidation aluminum shot
Degree is uniform, and surface is smooth, and mechanical strength is big, and hygroscopicity is strong, and swollen do not split does not maintain the original state after water suction, nontoxic, odorless, do not dissolve in
Water, ethanol.Activated alumina is a kind of efficient drying agent of minor amount of water depth drying.
It is to be appreciated that to improve removal effect of the activated alumina to phosphor contaminant, generally with aluminum sulfate or hydrogen
Sodium oxide molybdena is modified as modifying agent using infusion process to it, and obtained modified activated aluminum oxide has bigger ratio surface
Product, compared with activated alumina, the adsorbance to phosphorus is higher, and preferable to the phosphor contaminant effect for removing higher concentration.
The role of above-mentioned adhesive is to make modified activated aluminum oxide and natural montmorillonite by the adhesive effect of itself
It is bonded together.Adhesive can be enumerated as one or both of sodium metasilicate, polyvinyl alcohol environmental protection Non-toxic adhesive.Sodium metasilicate custom
Claim sodium silicate, be a kind of water-soluble silicate, its aqueous solution is commonly called as waterglass, be a kind of ore deposit binder, its cohesive force is strong, intensity
It is higher, acid resistance, heat-resist, alkali resistance and poor water resistance.Polyvinyl alcohol (PVA) have viscous well with hydrophilic fiber
Relay, can promote being incorporated to for water-insoluble solvent, plasticizer, paraffin and oils, can improve cementability and tensile strength.
The present invention is using the excellent ion exchangeable of natural montmorillonite and adsorptivity, using modified activated aluminum oxide, gluing
Agent and sulfuric acid are modified to natural montmorillonite, so as to make that obtained modified alta-mud specific surface area is bigger, porosity is stronger, tool
Have stronger adsorption effect, moreover, modified activated aluminum oxide can remove higher concentration contain phosphor contaminant, modified alta-mud to compared with
Low to have preferable removal effect containing phosphor contaminant, both combine changes adaptable to phosphorus concentration.Therefore, dephosphorization of the invention is filled out
Expect under the comprehensive function of two kinds of approach of physical absorption and chemical reaction, dephosphorization ability is strong, it is ensured that the high efficiency of dephosphorization.Inhale in addition
Filler after attached saturation can be used for construction material or agricultural fertilizer, recycle to avoid the waste of resource again.
Present invention also offers a kind of preparation method of dephosphorization filler, comprise the following steps：
Bentonite, activated alumina, adhesive are added in acid solution and activated；
And it is to obtain modified alta-mud dephosphorization filler to bakee, cool down.
The volume fraction of above-mentioned acid solution is 3~7%, such as 3%, 4%, 5%, 6% or 7%.
Above-mentioned acid solution can be enumerated as sulfuric acid solution or hydrochloric acid solution etc., preferably sulfuric acid solution.What acidity rose
It act as providing acid reaction environment by decomposing hydrogen ion, is more beneficial for modified activated aluminum oxide and natural montmorillonite and gluing
The admixture activation of agent obtains the more preferable modified alta-mud of adsorptivity.
Preferably, the activated alumina is modified activated alumina；Its modification procedure is specially：
Take activated alumina to be eluted with water, then filter, in 100~120 DEG C such as 100 DEG C, 110 DEG C or 120 DEG C of isothermals
The lower drying of degree；
Be 0.025~0.03mol/L such as 0.025mol/L by dried activated alumina addition concentration,
In 0.026mol/L, 0.028mol/L or 0.03mol/L etc. aluminum sulfate solution, at 20~25 DEG C 20 DEG C, 21 DEG C, 23 DEG C or 25
Shaking with 110~130r/min such as 110r/min, 115r/min, 120r/min, 125r/min or 130r/min under DEG C equitemperature
Taken out after speed 3~4h of concussion such as 3h, 3.2h, 3.5h, 3.8h or 4h；
Cleaned repeatedly, dried after filtering under 100~120 DEG C such as 100 DEG C, 110 DEG C or 120 DEG C of equitemperatures with water again,
Then 4~5h is bakeed such as under 500~600 DEG C such as 500 DEG C, 520 DEG C, 540 DEG C, 560 DEG C, 580 DEG C or 600 DEG C of equitemperatures
4h, 4.2h, 4.5h, 4.8h or 5h etc., obtain modified active aluminum oxide.
Preferably, the granularity of the modified activated aluminum oxide is 100~200 mesh, such as 100 mesh, 110 mesh, 120 mesh, 150
Mesh, 180 mesh, 190 mesh or 200 mesh.
Preferably, the activation process is carried out in 90 ± 2 DEG C of water bath, and with 50~70r/min such as 50r/
Min, 55/min, 60r/min, 65r/min or 70r/min vibration velocity concussion activation 2~3h, such as 2h, 2.3h, 2.5h, 2.8h
Or 3h.
Preferably, after the activation, bakee before also include according to being washed, filtered successively by elder generation to rear order
And dried under 100~120 DEG C such as 100 DEG C, 110 DEG C or 120 DEG C of equitemperatures.
Preferably, the stoving temperature is 500~700 DEG C, such as 500 DEG C, 550 DEG C, 600 DEG C, 650 DEG C or 700 DEG C；Institute
The time of baking and banking up with earth is stated for 2~2.5h, such as 2h, 2.1h, 2.2h, 2.3h or 2.5h.
Above-mentioned water is preferably deionized water.
For the ease of understanding the present invention, technical scheme is further illustrated with reference to embodiment.Applicant
Statement, the present invention illustrates detailed process equipment and the technological process of the present invention, but not office of the invention by above-described embodiment
It is limited to above-mentioned detailed process equipment and technological process, that is, does not mean that the present invention should rely on above-mentioned detailed process equipment and technique stream
Cheng Caineng is implemented.Person of ordinary skill in the field is it will be clearly understood that any improvement in the present invention, to each original of product of the present invention
The equivalence replacement of material and the addition of auxiliary element, the selection of concrete mode etc., all fall within protection scope of the present invention and open model
Within enclosing.
Embodiment 1
A kind of preparation method of dephosphorization filler, comprises the following steps：
(1) preparation of modified activated aluminum oxide：Activated alumina is taken to be cleaned up with deionized water, until surface does not have nothing
In 100 DEG C of dryings after machine impurity, the activated alumina filtration cleaned up.Dried activated alumina is added into concentration
In 0.025mol/L aluminum sulfate solution, at 21 DEG C, shaken with 110r/min vibration velocity, taken out after concussion 3h, use deionization
Water cleaning is multiple, in 100 DEG C of dryings after filtering；Then 4h is bakeed at a temperature of 500 DEG C, obtains modified active aluminum oxide, will changed
Activated alumina after property grinds and crosses 100 mesh sieves, obtains the modified activated aluminum oxide of 100 mesh granularities.
(2) take natural montmorillonite to cross 200 mesh sieves, obtain the bentonite of 200 mesh granularities.
(3) by 200 mesh bentonites, 100 mesh modified active aluminum oxide, adhesive, by weight percentage respectively 75 parts, 15
Part, 3 parts of proportioning are added to admixture activation in the sulfuric acid that volume fraction is 3% so that solid-to-liquid ratio is 1:3.This admixture activation mistake
Journey is carried out in 90 ± 2 DEG C of a water bath, and with the vibration velocity vibration activation 2h of 50r/min at a slow speed.Then in being washed to
Property, in 100 DEG C of dryings after filtering.
(4) bentonite for obtaining step (3) process continues to produce after bakeing 2h, cooling under 500 DEG C of hot environment
To modified alta-mud dephosphorization filler.Filler can be graininess when being finally molded, and the finished product that 300 mesh are made is standby.
Embodiment 2
A kind of preparation method of dephosphorization filler, comprises the following steps：
(1) preparation of modified activated aluminum oxide：Activated alumina is taken to be cleaned up with deionized water, until surface does not have nothing
In 110 DEG C of dryings after machine impurity, the activated alumina filtration cleaned up.Dried activated alumina is added into concentration
In 0.026mol/L aluminum sulfate solution, at 23 DEG C, shaken, taken out after concussion 3.2h with 120r/min vibration velocity, spend from
Sub- water cleaning is multiple, in 110 DEG C of dryings after filtering；Then 4.2h is bakeed at a temperature of 540 DEG C, obtains modified active aluminum oxide,
Modified activated alumina is ground and 150 mesh sieves are crossed, the modified activated aluminum oxide of 150 mesh granularities is obtained.
(2) take natural montmorillonite to cross 250 mesh sieves, obtain the bentonite of 250 mesh specifications.
(3) by 250 mesh bentonites, 150 mesh modified active aluminum oxide, adhesive, by weight percentage respectively 78 parts, 11
Part, 4 parts of proportioning be added to volume fraction be 4% sulfuric acid in admixture activation, so as to get solid-to-liquid ratio be 1:3.This mixing is lived
Change process is carried out in 90 ± 2 DEG C of a water bath, and with the vibration velocity vibration activation 2.3h of 55r/min at a slow speed.Then water
Neutrality is washed till, in 110 DEG C of dryings after filtering.
(4) bentonite for obtaining step (3) process continues to bakee 2.3h under 550 DEG C of hot environment, after cooling i.e.
Obtain modified alta-mud dephosphorization filler.Filler can be graininess when being finally molded, and the finished product that 300 mesh are made is standby.
Embodiment 3
A kind of preparation method of dephosphorization filler, comprises the following steps：
(1) preparation of modified activated aluminum oxide：Activated alumina is taken to be cleaned up with deionized water, until surface does not have nothing
In 110 DEG C of dryings after machine impurity, the activated alumina filtration cleaned up.Dried activated alumina is added into concentration
In 0.028mol/L aluminum sulfate solution, at 20 DEG C, shaken with 110r/min vibration velocity, taken out after concussion 3h, use deionization
Water cleaning is multiple, in 110 DEG C of dryings after filtering；Then 4.5h is bakeed at a temperature of 560 DEG C, obtains modified active aluminum oxide, will
Modified activated alumina grinds and crosses 200 mesh sieves, obtains the modified activated aluminum oxide of 200 mesh granularities.
(2) take natural montmorillonite to cross 300 mesh sieves, obtain the bentonite of 300 mesh specifications.
(3) by 300 mesh bentonites, 200 mesh modified active aluminum oxide, adhesive, by weight percentage respectively 76 parts, 12
Part, 6 parts of proportioning be added to volume fraction be 5% sulfuric acid in admixture activation, so as to get solid-to-liquid ratio be 1:3.This mixing is lived
Change process is carried out in 90 ± 2 DEG C of a water bath, and with the vibration velocity vibration activation 2h of 60r/min at a slow speed.Then wash
To neutral, in 100 DEG C of dryings after filtering.
(4) bentonite for obtaining step (3) process continues to bakee 2.5h under 600 DEG C of hot environment, after cooling i.e.
Obtain modified alta-mud dephosphorization filler.Filler can be graininess when being finally molded, and the finished product that 300 mesh are made is standby.
Embodiment 4
A kind of preparation method of dephosphorization filler, comprises the following steps：
(1) preparation of modified activated aluminum oxide：Activated alumina is taken to be cleaned up with deionized water, until surface does not have nothing
In 110 DEG C of dryings after machine impurity, the activated alumina filtration cleaned up.Dried activated alumina is added into concentration
In 0.03mol/L aluminum sulfate solution, at 20 DEG C, shaken with 125r/min vibration velocity, taken out after concussion 3h, use deionized water
Cleaning is multiple, in 110 DEG C of dryings after filtering；Then 4.8h is bakeed at a temperature of 580 DEG C, obtains modified active aluminum oxide, will changed
Activated alumina after property grinds and crosses 100 mesh sieves.
(2) take natural montmorillonite to cross 300 mesh sieves, obtain the bentonite of 300 mesh specifications.
(3) by 300 mesh bentonites, 100 mesh modified active aluminum oxide, adhesive, by weight percentage respectively 77 parts, 13
Part, 4 parts of proportioning be added to volume fraction be 6% sulfuric acid in admixture activation, so as to get solid-liquid weight ratio be 1:3.This is mixed
Activation process is closed to carry out in 90 ± 2 DEG C of a water bath, and with the vibration velocity vibration activation 2h of 50r/min at a slow speed.Then
Neutrality is washed to, in 100 DEG C of dryings after filtering.
(4) bentonite for obtaining step (3) process continues to bakee 2.8h under 650 DEG C of hot environment, after cooling i.e.
Obtain modified alta-mud dephosphorization filler.Filler can be graininess when being finally molded, and the finished product that 300 mesh are made is standby.
Embodiment 5
A kind of preparation method of dephosphorization filler, comprises the following steps：
(1) preparation of modified activated aluminum oxide：Activated alumina is taken to be cleaned up with deionized water, until surface does not have nothing
In 120 DEG C of dryings after machine impurity, the activated alumina filtration cleaned up.Dried activated alumina is added into concentration
In 0.028mol/L aluminum sulfate solution, at 25 DEG C, shaken with 130r/min vibration velocity, taken out after concussion 3h, use deionization
Water cleaning is multiple, in 120 DEG C of dryings after filtering；Then 5h is bakeed at a temperature of 600 DEG C, obtains modified active aluminum oxide, will changed
Activated alumina after property grinds and crosses 100 mesh sieves.
(2) take natural montmorillonite to cross 300 mesh sieves, obtain the bentonite of 300 mesh specifications.
(3) by 300 mesh bentonites, 100 mesh modified active aluminum oxide, adhesive, by weight percentage respectively 80 parts, 10
Part, 5 parts of proportioning be added to volume fraction be 7% sulfuric acid in admixture activation, so as to get solid-liquid in weight ratio be 1:3.This
Admixture activation process is carried out in 90 ± 2 DEG C of a water bath, and with the vibration velocity vibration activation 3h of 70r/min at a slow speed.So
After be washed to neutrality, in 100 DEG C of dryings after filtering.
(4) bentonite for obtaining step (3) process continues to produce after bakeing 3h, cooling under 700 DEG C of hot environment
To modified alta-mud dephosphorization filler.Filler can be graininess when being finally molded, and the finished product that 300 mesh are made is standby.
Comparative example
The raw material of its in this example does not include activated alumina, the other the same as in Example 5.
Laboratory Static simulation test
Casing is tested in making in laboratory, dimensions is 1m × 1m × 1m, and PVC materials, top is opened wide, by above-mentioned implementation
Example gained modified alta-mud dephosphorization filler loads experimental box body, and 10-15mg/L phosphorus-containing wastewaters are passed through water inlet by depth of packing 80cm
Pipe enters experimental box body from top, in bottom discharge after filler filtration treatment, hydraulic load 6m/h or so is kept, at detection
Phosphorus-containing wastewater concentration after reason.
Experimental result is as follows：
It is above-mentioned test result indicates that, the dephosphorization ability of preparation-obtained dephosphorization filler is less than of the invention real in comparative example
Apply the dephosphorization filler that example is prepared into.The present invention is modified using activated alumina, adhesive and sulfuric acid to natural montmorillonite, from
And making obtained modified alta-mud dephosphorization filler that there is stronger adsorption effect, dephosphorization ability is strong.
Claims (10)
1. a kind of dephosphorization filler, it is characterised in that：Its raw material includes 75~80 parts of bentonites, 10~15 parts of activity according to mass parts
Aluminum oxide and 3~6 parts of adhesives.
2. dephosphorization filler according to claim 1, it is characterised in that：The bentonite is natural montmorillonite；The swelling
The granularity of soil is 200~300 mesh.
3. dephosphorization filler according to claim 1 and preparation method thereof, it is characterised in that：The adhesive be sodium metasilicate,
One or both of polyvinyl alcohol gluing agent.
4. a kind of preparation method of the dephosphorization filler described in claim 1, it is characterised in that：Comprise the following steps：
Bentonite, activated alumina, adhesive are added in acid solution and activated；
And it is to obtain modified alta-mud dephosphorization filler to bakee, cool down.
5. the preparation method of dephosphorization filler according to claim 4, it is characterised in that：The volume fraction of the acid solution
For 3~7%.
6. the preparation method of dephosphorization filler according to claim 4, it is characterised in that：The activated alumina is modified
Activated alumina；Its modification procedure is specially：
Take activated alumina to be eluted with water, then filter, dried at 100~120 DEG C；
Dried activated alumina is added in the aluminum sulfate solution that concentration is 0.025~0.03mol/L, at 20~25 DEG C
Shaken and taken out after 3~4h with 110~130r/min vibration velocity；
Cleaned repeatedly, dried after filtering at 100~120 DEG C with water again, 4~5h is then bakeed at 500~600 DEG C, is obtained
Modified active aluminum oxide.
7. the preparation method of dephosphorization filler according to claim 5, it is characterised in that：The grain of the modified activated aluminum oxide
Spend for 100~200 mesh.
8. the preparation method of dephosphorization filler according to claim 4, it is characterised in that：The activation process is at 90 ± 2 DEG C
Water bath in carry out, and with 50~70r/min vibration velocity concussion activation, 2~3h.
9. the preparation method of dephosphorization filler according to claim 4, it is characterised in that：After the activation, bakee it
It is preceding also to include according to being washed successively by elder generation to rear order, filter and dried at 100~120 DEG C.
10. the preparation method of dephosphorization filler according to claim 4, it is characterised in that：The stoving temperature be 500~
It is 700 DEG C, described to bake and bank up with earth the time for 2~2.5h.
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