CN104998624A - Dephosphorization absorbent granulation method - Google Patents
Dephosphorization absorbent granulation method Download PDFInfo
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- CN104998624A CN104998624A CN201510436996.5A CN201510436996A CN104998624A CN 104998624 A CN104998624 A CN 104998624A CN 201510436996 A CN201510436996 A CN 201510436996A CN 104998624 A CN104998624 A CN 104998624A
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- dephosphorization
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Abstract
The invention relates to a raw material granulation method, in particular to a dephosphorization absorbent granulation method. By means of the method, produced products are even in particle, high in strength, good in absorption capacity and convenient to regenerate. The dephosphorization absorbent granulation method includes the steps of breaking, adding of bonding agents, solidifying, drying and screening. By means of the dephosphorization absorbent granulation method, the capacity of removing phosphori effectively of powdery dephosphorization oxide can be retained, meanwhile the absorbent can be regenerated, and the dephosphorization effect is restored basically after regeneration. The products produced through the method are even in particle and high in strength. The method is used for the field of environment protection.
Description
Technical field
The present invention relates to a kind of method making feed particles, particularly relate to a kind of for by granular for dephosphorization adsorbent method.
Background technology
Phosphorus is one of all life entities indispensable element of depending on for existence, and be also a kind of non-renewable resources, the phosphorus ore resource reserves of occurring in nature are limited.The one in 20 kinds of mineral products of national economic development demand can not be met after China's phosphorus ore has been listed in 2010.While phosphor resource faces scarcity, excessive phosphorus discharge causes the crisis of body eutrophication in the world.Research shows, the governing factor in most eutrophication water is phosphorus, and therefore, Phosphorus From Wastewater discharge capacity controls to be the important means of preventing body eutrophication.
Under the pressure of the severe situation of body eutrophication, national governments and the common people require more to improve to municipal sewage treatment in recent years, index about nutrient salts in sewage drainage standard is also more and more stricter, in order to reach discharge standard, increasing municipal sewage plant all introduces the sewage treatment process with denitrogenation dephosphorizing function, in clarifying urban sewage while organic pollution, significantly cut down the nitrogen and phosphorus content in water outlet.But at present for various reasons, a lot of Sewage Plant biological denitrification phosphorous removal technique effect does not reach expection, and water outlet phosphorus only relies on biological phosphate-eliminating more difficult up to standard.
Absorption method dephosphorization utilizes the solid matter of some porous or bigger serface to the affinity of phosphate anion in water, the technology of phosphorus removal from wastewater realized.The physical absorption that phosphorus is shown by adsorbent, ion-exchange or show coprecipitation process, realize phosphorus from the separation sewage, and can reclaim phosphor resource further by desorb process.The key of absorption method dephosphorization is to find new and effective sorbing material, and can conveniently use in sewage treatment process.Existing dephosphorization adsorbent is generally Powdered, cause absorption saturated because particle is too small after, and the regeneration difficulty of sorbing material.At present not for dephosphorization adsorbent granulating technique, and adopt the dephosphorization adsorbent of conventional granulating technique as the prilling process such as compression comminution granulation, broken comminution granulation, spray drying granulation method, extruder grain method are produced to there is the problem of adsorption effect conductively-closed, and after granulation, particle is uneven, intensity is low, in storage, transport with use, can not shape be kept in regenerative process, be easy to broken and caking, therefore preparing high-quality granular high-efficiency dephosphorization adsorbent is one of following dephosphorization technique developing direction.
Summary of the invention
The technical problem to be solved in the present invention is to provide that a kind of obtained product particle is even, intensity is large, adsorption capacity good, is convenient to the prilling process of the dephosphorization adsorbent regenerated.
The prilling process of a kind of dephosphorization adsorbent of the present invention, comprises the following steps:
One, efficient dephosphorization oxide solid is broken, make the raw meal particle size after fragmentation be less than 2mm;
Two, mixed with binding agent by the material after fragmentation, the moisture content making mixed material is 70-80%, mixes rear feeding extruder, squeezes out drop-wise material;
Three, in the material instillation consolidation liquid extruded by extruder, granular material is solidified into;
Four, sent into by granular material in band drier dry, temperature is 50-90 DEG C, time of staying 10-30min; 5% is less than by above-mentioned dried material water ratio;
Five, sieve, obtaining particle diameter is the product of 0.5-5mm;
Described binding agent is the aqueous solution of shitosan, and mass concentration is 2-10%;
Described consolidation liquid is sodium hydroxide solution, and mass concentration is 1-5%.
In step 4 of the present invention, dry materials is less than 5% to moisture content, is conducive to product and keeps grain shape, be convenient to preserve.
Further, the prilling process of dephosphorization adsorbent of the present invention, described efficient dephosphorization oxide is at least one in FeOOH, iron oxide, iron hydroxide, aluminium oxide or lanthana.
Further, the prilling process of dephosphorization adsorbent of the present invention, described efficient dephosphorization oxide moisture content is less than 10%.
Further, the prilling process of dephosphorization adsorbent of the present invention, in described step 5, particle diameter does not meet the product of 0.5-5mm, repeats the operation of step one to five.
Further, the prilling process of dephosphorization adsorbent of the present invention, the extruder in described step 3 is 1-4 group.
The prilling process difference from prior art of dephosphorization adsorbent of the present invention is:
1, utilize the inventive method to carry out granulation to dephosphorization adsorbent, the Powdered ability except phosphorous oxides efficient dephosphorization can be retained, dephosphorization adsorbent can be made the large particle of intensity again simultaneously, dephosphorization adsorbent is regenerated and reuses.
2, the inventive method granulation is utilized, the granulated pellet of gained is even, intensity good, the process not easily broken and caking of long-term stacking and transhipment, the qualified shot-like particle content that a granulation is formed is more than 95%, returning charge amount is below 5%, reduce the energy consumption because returning charge produces, effectively raise the utilization rate of equipment.
3, the inventive method can also by regulating the size of binder amount and extruded hole, thus the particle size range needed for obtaining.
Be described further below in conjunction with the prilling process of embodiment to dephosphorization adsorbent of the present invention.
Embodiment 1
Detailed description of the invention
The prilling process of the dephosphorization adsorbent of the present embodiment, carries out according to the following steps:
One, efficient dephosphorization oxide is broken, make the raw meal particle size after fragmentation be less than 2mm;
Two, mixed with binding agent by the material after fragmentation, the moisture content making mixed material is 75%, mixes rear feeding extruder, squeezes out drop-wise material;
Three, in the material instillation consolidation liquid extruded by extruder, granular material is solidified into;
Four, sent into by granular material in band drier dry, temperature is 70 DEG C, time of staying 30min;
Five, sieve, obtaining particle diameter is the product of 0.5-5mm;
Efficient dephosphorization oxide is the iron hydroxide of 1kg;
Binding agent to be mass concentration be 8% chitosan aqueous solution;
The quantity of described extruder is 3 groups;
Consolidation liquid is mass concentration is 3% sodium hydroxide solution.
Embodiment 2
The prilling process of the dephosphorization adsorbent of the present embodiment, carries out according to the following steps:
One, efficient dephosphorization oxide is broken, make the raw meal particle size after fragmentation be less than 2mm;
Two, mixed with binding agent by the material after fragmentation, the moisture content making mixed material is 72%, mixes rear feeding extruder, squeezes out drop-wise material;
Three, in the material instillation consolidation liquid extruded by extruder, granular material is solidified into;
Four, sent into by granular material in band drier dry, temperature is 60 DEG C, time of staying 25min;
Five, sieve, obtaining particle diameter is the product of 0.5-5mm;
Efficient dephosphorization oxide is the aluminium oxide of 1kg;
Binding agent to be mass concentration be 10% chitosan aqueous solution;
The quantity of described extruder is 4 groups;
Consolidation liquid is mass concentration is 4% sodium hydroxide solution.
Embodiment 3
The prilling process of the dephosphorization adsorbent of the present embodiment, carries out according to the following steps:
One, efficient dephosphorization oxide is broken, make the raw meal particle size after fragmentation be less than 2mm;
Two, mixed with binding agent by the material after fragmentation, the moisture content making mixed material is 70%, mixes rear feeding extruder, squeezes out drop-wise material;
Three, in the material instillation consolidation liquid extruded by extruder, granular material is solidified into;
Four, sent into by granular material in band drier dry, temperature is 50 DEG C, time of staying 15min;
Five, sieve, obtaining particle diameter is the product of 0.5-5mm;
Efficient dephosphorization oxide is the lanthana of 1kg;
Binding agent to be mass concentration be 4% chitosan aqueous solution;
The quantity of described extruder is 2 groups;
Consolidation liquid is mass concentration is 5% sodium hydroxide solution.
Embodiment 4
The prilling process of the dephosphorization adsorbent of the present embodiment, carries out according to the following steps:
One, efficient dephosphorization oxide is broken, make the raw meal particle size after fragmentation be less than 2mm;
Two, mixed with binding agent by the material after fragmentation, the moisture content making mixed material is 78%, mixes rear feeding extruder, squeezes out drop-wise material;
Three, in the material instillation consolidation liquid extruded by extruder, granular material is solidified into;
Four, sent into by granular material in band drier dry, temperature is 80 DEG C, time of staying 10min;
Five, sieve, obtaining particle diameter is the product of 0.5-5mm;
Efficient dephosphorization oxide is the iron oxide of 1kg;
Binding agent to be mass concentration be 2% chitosan aqueous solution;
The quantity of described extruder is 1 group;
Consolidation liquid is mass concentration is 1% sodium hydroxide solution.
Embodiment 5
The prilling process of the dephosphorization adsorbent of the present embodiment, carries out according to the following steps:
One, efficient dephosphorization oxide is broken, make the raw meal particle size after fragmentation be less than 2mm;
Two, mixed with binding agent by the material after fragmentation, the moisture content making mixed material is 80%, mixes rear feeding extruder, squeezes out drop-wise material;
Three, in the material instillation consolidation liquid extruded by extruder, granular material is solidified into;
Four, sent into by granular material in band drier dry, temperature is 90 DEG C, time of staying 20min;
Five, sieve, obtaining particle diameter is the product of 0.5-5mm;
Efficient dephosphorization oxide is the mixture of 0.5kg FeOOH and 0.5kg aluminium oxide;
Binding agent to be mass concentration be 6% chitosan aqueous solution;
The quantity of described extruder is 4 groups;
Consolidation liquid is mass concentration is 2% sodium hydroxide solution.
Embodiment 6
The prilling process of the dephosphorization adsorbent of the present embodiment, carries out according to the following steps:
One, efficient dephosphorization oxide is broken, make the raw meal particle size after fragmentation be less than 2mm;
Two, mixed with binding agent by the material after fragmentation, the moisture content making mixed material is 72%, mixes rear feeding extruder, squeezes out drop-wise material;
Three, in the material instillation consolidation liquid extruded by extruder, granular material is solidified into;
Four, sent into by granular material in band drier dry, temperature is 80 DEG C, time of staying 15min;
Five, sieve, obtaining particle diameter is the product of 0.5-5mm;
Efficient dephosphorization oxide is the FeOOH of 1kg;
Binding agent to be mass concentration be 4% chitosan aqueous solution;
The quantity of described extruder is 3 groups;
Consolidation liquid is mass concentration is 2% sodium hydroxide solution.
Embodiment 7
The prilling process of the dephosphorization adsorbent of the present embodiment, carries out according to the following steps:
One, efficient dephosphorization oxide is broken, make the raw meal particle size after fragmentation be less than 2mm;
Two, mixed with binding agent by the material after fragmentation, the moisture content making mixed material is 73%, mixes rear feeding extruder, squeezes out drop-wise material;
Three, in the material instillation consolidation liquid extruded by extruder, granular material is solidified into;
Four, sent into by granular material in band drier dry, temperature is 85 DEG C, time of staying 12min;
Five, sieve, obtaining particle diameter is the product of 0.5-5mm;
Efficient dephosphorization oxide is the mixture of 0.3kg FeOOH, 0.2kg iron oxide and 0.5kg lanthana;
Binding agent to be mass concentration be 6% chitosan aqueous solution;
The quantity of described extruder is 2 groups;
Consolidation liquid is mass concentration is 5% sodium hydroxide solution.
Embodiment 8
The prilling process of the dephosphorization adsorbent of the present embodiment, carries out according to the following steps:
One, efficient dephosphorization oxide is broken, make the raw meal particle size after fragmentation be less than 2mm;
Two, mixed with binding agent by the material after fragmentation, the moisture content making mixed material is 77%, mixes rear feeding extruder, squeezes out drop-wise material;
Three, in the material instillation consolidation liquid extruded by extruder, granular material is solidified into;
Four, sent into by granular material in band drier dry, temperature is 60 DEG C, time of staying 30min;
Five, sieve, obtaining particle diameter is the product of 0.5-5mm;
Efficient dephosphorization oxide is the mixture of 0.2kg FeOOH, 0.1kg iron oxide, 0.5kg iron hydroxide, 0.2kg aluminium oxide;
Binding agent to be mass concentration be 4% chitosan aqueous solution;
The quantity of described extruder is 2 groups;
Consolidation liquid is mass concentration is 3% sodium hydroxide solution.
Embodiment 9
The prilling process of the dephosphorization adsorbent of the present embodiment, difference from Example 1 is: after step 5 screening, and the particle that remaining particle diameter does not conform to symbol 0.5-5mm returns step one, re-starts fragmentation, then processes according to step 2 to five successively.
Demonstration test
Detect the granule strength, dephosphorization ability, regeneration effect etc. of product obtained in embodiment 1-8, partial results is in table 1.
Granule strength detector for strength of particles detects.
Dephosphorization ability adopts following steps to measure:
Product granulation in embodiment 1-9 obtained is filled in fixed bed reactors, wherein reactor height about 1.2m, diameter 20cm, packing volume 6000cm
3; To be 5mg/L, pH by phosphorus concentration be 7 water source to be clean, be filled with by the water inlet of fixed bed reactors and flowed out by delivery port; Filtering velocity is 3m/h; The real time measure water outlet phosphorus concentration.
After measured, use product obtained in embodiment 1-9 to purify phosphorous water source, after average flowing-through 50 times of packing volumes, in water outlet, phosphorus concentration is just higher than 0.5mg/L.
Regeneration effect is measured by following steps:
One, the highly basic of 1mol/L is pumped in the above-mentioned fixed bed reactors that the product that the saturated embodiment 1-8 of absorption obtains is housed, alkali lye is circulated in fixed bed reactors; Wherein the mass ratio of obtained product and highly basic is 1:5;
Two, after circulation 0.5h, alkali lye is emptying;
Three, using clean water fixed bed reactors, is 7.8 to cleaning fluid pH.
Four, to be 5mg/L, pH by phosphorus concentration be again 7 water source to be clean, be filled with by the water inlet of fixed bed reactors and flowed out by delivery port; Filtering velocity is 3m/h; The real time measure water outlet phosphorus concentration.
After measured, use product obtained in embodiment 1-9 to purify phosphorous water source, after average flowing-through 47 times of packing volumes, in water outlet, phosphorus concentration is just higher than 0.5mg/L.
Known by above result, the prilling process of dephosphorization adsorbent of the present invention carries out granulation to dephosphorization adsorbent, can retain the Powdered ability except phosphorous oxides efficient dephosphorization, make adsorbent regenerate simultaneously, and after regeneration, phosphor-removing effect recovers substantially.Adopt the inventive method products obtained therefrom uniform particles, intensity is good, stacks 1 month without broken caking phenomenon.
Although the foregoing describe the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is defined by the appended claims.Those skilled in the art, under the prerequisite not deviating from principle of the present invention and essence, can make various changes or modifications to these embodiments, but these change and amendment all falls into protection scope of the present invention.
Claims (4)
1. a prilling process for dephosphorization adsorbent, is characterized in that comprising the following steps:
One, efficient dephosphorization oxide is broken, make the raw meal particle size after fragmentation be less than 2mm;
Two, mixed with binding agent by the material after fragmentation, the moisture content making mixed material is 70-80%, mixes rear feeding extruder, squeezes out drop-wise material;
Three, in the material instillation consolidation liquid extruded by extruder, granular material is solidified into;
Four, sent into by granular material in band drier dry, temperature is 50-90 DEG C, time of staying 10-30min;
Five, sieve, obtaining particle diameter is the product of 0.5-5mm;
Described efficient dephosphorization oxide is at least one in FeOOH, iron oxide, iron hydroxide, aluminium oxide or lanthana;
Described binding agent is the aqueous solution of shitosan, and mass concentration is 2-10%;
Described consolidation liquid is sodium hydroxide solution, and mass concentration is 1-5%.
2. the prilling process of dephosphorization adsorbent according to claim 1, is characterized in that: described efficient dephosphorization oxide moisture content is less than 10%.
3. the prilling process of dephosphorization adsorbent according to claim 1, is characterized in that: in described step 5, particle diameter does not meet the product of 0.5-5mm, repeats the operation of step one to five.
4. the prilling process of dephosphorization adsorbent according to claim 1, is characterized in that: the extruder in described step 3 is 1-4 group.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107265548A (en) * | 2017-07-05 | 2017-10-20 | 盛隆资源再生（无锡）有限公司 | A kind of method using the attapulgite depth adsorption and dephosphorization for loading hydrated ferric oxide |
| CN110770175A (en) * | 2017-06-16 | 2020-02-07 | 高桥金属株式会社 | Adsorption process |
| CN111039658A (en) * | 2019-12-31 | 2020-04-21 | 广东省水利水电科学研究院 | Phosphorus removal ceramsite and preparation method thereof |
| CN113634222A (en) * | 2021-08-20 | 2021-11-12 | 中国人民大学 | Red mud ceramsite adsorbent and preparation method and application thereof |
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| CN101249417A (en) * | 2008-03-28 | 2008-08-27 | 合肥工业大学 | Concave-convex bar stone clay-trihydrate alumina/iron nano composite adsorbing agent, preparation and applications |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110770175A (en) * | 2017-06-16 | 2020-02-07 | 高桥金属株式会社 | Adsorption process |
| CN110770175B (en) * | 2017-06-16 | 2022-04-19 | 高桥金属株式会社 | Adsorption process |
| CN107265548A (en) * | 2017-07-05 | 2017-10-20 | 盛隆资源再生（无锡）有限公司 | A kind of method using the attapulgite depth adsorption and dephosphorization for loading hydrated ferric oxide |
| CN111039658A (en) * | 2019-12-31 | 2020-04-21 | 广东省水利水电科学研究院 | Phosphorus removal ceramsite and preparation method thereof |
| CN113634222A (en) * | 2021-08-20 | 2021-11-12 | 中国人民大学 | Red mud ceramsite adsorbent and preparation method and application thereof |
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Application publication date: 20151028 |