CN103801256B - A kind of porous adsorbing medium for water treatment and preparation method thereof - Google Patents
A kind of porous adsorbing medium for water treatment and preparation method thereof Download PDFInfo
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- CN103801256B CN103801256B CN201310749916.2A CN201310749916A CN103801256B CN 103801256 B CN103801256 B CN 103801256B CN 201310749916 A CN201310749916 A CN 201310749916A CN 103801256 B CN103801256 B CN 103801256B
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Abstract
The invention discloses a kind of porous adsorbing medium for water treatment, described porous adsorbing medium is prepared from by the raw material comprising following consumption: the grey 70-80 part of silica sand casting regeneration, mud 5-15 part, flyash 5-15 part, active carbon 0-10 part and stalk or cormophyte particle 5-10 part.The porous adsorbing medium matter that the present invention obtains is hard, and proportion is greater than 1, sinks to the bottom completely, and voidage is high, and specific area is large, is applicable in ambient water treatment technology as biologic packing material (obturator as in biofilter).The present invention makes refuse be fully used, and is successfully applied to protection of the environment and Environment control, turns waste into wealth, and makes tremendous contribution for beautifying ecological environment.
Description
Technical field
The present invention relates to technical field of water treatment, particularly a kind of porous adsorbing medium for water treatment and preparation method thereof.
Background technology
As everyone knows, China's foundry enterprise is more than family more than 25000, casting output for many years position occupies first place in the world, wherein silica sand mold casting accounts for the overwhelming majority in foundry industry, be approximately 80% ~ 90%, the reclaiming of waste silicon sand can produce a large amount of regeneration ashes, and most enterprises is to be discarded as master, this is great waste to the grey resource of regeneration, and can cause serious environmental pollution.The utilization of silica sand casting regeneration ash can realize the recycling of resource, be also conducive to protection of the environment and Environment control, and then contribution is social and promote the well-being of mankind.Therefore the utilization of silica sand casting regeneration ash has become China's problem in the urgent need to address.
Prior art discloses the multiple technical scheme utilized by silica sand casting regeneration ash, as by the technical scheme of silica sand dust for the preparation of proppant, fire proofing material, barrier material and building stone etc., but have not yet to see the correlative study or report that are applied to water treatment.
In view of this, special proposition the present invention.
Summary of the invention
Object of the present invention provides a kind of economy, environmental protection, disposable apparatus to drop into the method that little silica sand casting regenerates grey recycling treatment, casting waste silicon sand regeneration ash is manufactured porous media through certain operation, the heavy metal in regeneration ash and harmful substance is made to be fixed in porous media, and be used in ambient water process as biologic packing material by the porous media produced, thus realize the innoxious and recycling treatment of silica sand casting regeneration ash.
For realizing above-mentioned object, the present invention adopts following technical scheme:
For a porous adsorbing medium for water treatment, described porous adsorbing medium is prepared from by the raw material comprising following consumption: the grey 70-80 part of silica sand casting regeneration, mud 5-15 part, flyash 5-15 part, active carbon 0-10 part and stalk or cormophyte particle 5-10 part.
Wherein, preferred described porous adsorbing medium is prepared from by the raw material comprising following consumption: the grey 72-76 part of silica sand casting regeneration, mud 8-12 part, flyash 8-12 part, active carbon 4-8 part and stalk or cormophyte particle 6-8 part.
By above-mentioned specific amount ratio batching, the present invention can prepare the porous adsorbing medium with Ideal adsorption and treatment efficiency, achieves the abundant recycling of silica sand regeneration ash.
Wherein, described silica sand casting regeneration ash comes from the dust produced in silica sand casting workpiece process, application after collecting via silica sand reclaim equiment dust collect plant.The described grey granularity of silica sand casting regeneration is between 3 μ ~ 20 μm, and preferably 10 μ to 20 μm, the regeneration ash under this size is of value to and coordinates with other components, finally obtains surperficial microporous structure, guarantees the absorption property of finished product.
The main component of regeneration ash of the present invention is metal oxide and nonmetal oxide.Metal oxide comprises the oxide of potassium, calcium, sodium, magnesium, aluminium, iron, and nonmetal oxide is silica (SiO
2).Regeneration of the present invention ash, preferably wherein SiO
2, Al
2o
3and Fe
2o
3three's sum accounts for 70 ~ 90% of the grey total amount of regeneration.
Wherein, mud of the present invention is chosen as the excess sludge that sewage biological treatment system is arranged outward, and excess sludge refers in activated Sludge System from the activated sludge (activated sludge that biologically active is lower or aging) secondary sedimentation tank (or settling zone) discharge system.The organic substance that this activated sludge is depended on by micropopulation and they and inorganic substances form.Micropopulation mainly comprises bacterium, protozoan and algae etc.This kind of mud emitted from sedimentation basin is known substance, is disclosed in various activated Sludge System (as sewage disposal system), has certain biologically active, organic content is higher, in roasting process, producing gas, rapid spatial expansion, is a kind of swelling agent.Concrete obtaining means is grasped by those skilled in the art, and the present invention is not particularly limited this.Wherein, the sieve order number of described flyash is 45000-45500 order, and fineness is 0.03-0.05mm, and loss on ignition is not more than 10%.The sieve order number of preferably described flyash is 45400 orders, and fineness of pulverized-coal ash is 0.040mm, loss on ignition 2 ~ 8%, if flyash granularity or loss on ignition excessive, decline directly causing the intensity of porous media.
Active carbon of the present invention can adopt any one disclosed in prior art, and its average particle size range is 4 ~ 6mm.Preferred employing waste active carbon, waste active carbon has certain absorption and functions/drying, and waste active carbon relative surface area is large, can adsorb large quantity of air, and ceaselessly carries out oxidation reaction and promote reaction to carry out and thoroughly, general granularity of activated carbon is comparatively large, use safety.
Porous adsorbing medium of the present invention, 20 ~ 40 mesh sieves crossed by described stalk or cormophyte particle.Stalk or the burning of cormophyte particle produce a large amount of gas, and promote that porous media air chamber is formed, the those skilled in the art that are chosen as of concrete stalk or cormophyte particle grasped.
Above material is arranged in pairs or groups according to rational amount ratio by the present invention, high-quality porous adsorbing medium can be made, this porous adsorbing medium be entire body with cellular spherical, surperficial many micropores, coarse, in graininess, specific area is large, surface color is mostly leaden, and small part is brown.Its relative density is 2.4 ~ 2.6, and porosity is 75% ~ 80%, and average grain diameter is 4 ~ 6mm.PH value in water is in neutral, and specific area is large, is conducive to attachment and the growth of active sludge microorganism, and then purifies waste water in sewage, makes water quality become clear.
The second object of the present invention is the preparation method providing above-mentioned porous adsorbing medium, comprises the steps:
(1) screening regeneration ash from silica sand reclaim equiment dust collect plant;
(2) prepare burden, take the grey 70-80 part of silica sand casting regeneration, mud 5-15 part, flyash 5-15 part, active carbon 0-10 part and stalk or cormophyte particle 5-10 part, combined grinding;
(3) to ingredient water in mixed material, granulation is carried out by mist projection granulating tower;
(4) roasting is carried out to wet granular; First carry out preheating and baking 20-45 minute at 500 ~ 600 DEG C, and then carry out high-temperature roasting 1 ~ 2h at 1100 ~ 1200 DEG C;
(5) come out of the stove cooling, finished product sizing screening, obtains porous adsorbing medium.
Wherein, preferably described mist projection granulating tower evaporated quantity of water is 200kg/h; First carry out preheating and baking 0.5h at 500 ~ 600 DEG C after granulation, and then carry out high-temperature roasting 1.5h at 1150 DEG C.
Adopt above-mentioned preparation method, steady quality, homogeneous porous adsorbing medium can be obtained, the present invention uses recycling cast waste sand ash preparation porous adsorbing medium for water treatment, the batching excess sludge, waste and old active carbon etc. that use are all refuse reclamations, add stalk or cormophyte particle, roasting produces a large amount of gas, makes pellet undergoes rapid expansion, produces high-quality porous media.
The further claimed described application of porous adsorbing medium in water treatment of the present invention.Concrete as can be used for municipal wastewater process biofilter (BAF) filler, river clear water apparatus system filler etc.
The porous adsorbing medium matter that the present invention obtains is hard, and proportion is greater than 1, sinks to the bottom completely, and voidage is high, and specific area is large, is applicable in ambient water treatment technology as biologic packing material (obturator as in biofilter).The present invention makes refuse be fully used, and is successfully applied to protection of the environment and Environment control, turns waste into wealth, and makes tremendous contribution for beautifying ecological environment.
Detailed description of the invention
Below in conjunction with embodiment, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Embodiment 1
Batching: silica sand casting regeneration grey 75kg, mud 10kg, flyash 10kg, active carbon 5kg and stalk and cormophyte particle mixture 8kg.Wherein, the excess sludge that the sewage biological treatment system that mud takes from sewage treatment plant of Beijing is arranged outward; The sieve order number of flyash is 45000-45500 order, and fineness is 0.03-0.05mm, and loss on ignition is not more than 10%, and 30 ~ 40 mesh sieves crossed by stalk and cormophyte particle.
Porous adsorbing medium described in the present embodiment adopts following preparation method to prepare:
(1) from silica sand reclaim equiment dust collect plant, sieve the regeneration ash of 3 μm ~ 20 μm;
(2) prepare burden, take silica sand casting regeneration grey 75kg, mud 10kg, flyash 10kg, active carbon 5kg and stalk and cormophyte particle mixture 8kg, combined grinding;
(3) to ingredient water in mixed material, granulation is carried out by mist projection granulating tower;
(4) roasting is carried out to wet granular; First carry out preheating and baking 30 minutes at 550 DEG C, and then carry out high-temperature roasting 1.5h at 1150 DEG C;
(5) come out of the stove cooling, finished product sizing screening, obtains porous adsorbing medium.
The porous adsorbing medium relevant parameter of the present embodiment gained is: its relative density is 2.4 ~ 2.5, and porosity is 78% ~ 80%, and average grain diameter is 4 ~ 5mm.PH value in water is in neutral, and specific area is large, is conducive to attachment and the growth of active sludge microorganism, and then purifies waste water in sewage, makes water quality become clear.
Embodiment 2
Batching: silica sand casting regeneration grey 70kg, mud 5kg, flyash 5kg and stalk 5kg.
Porous adsorbing medium described in the present embodiment adopts following preparation method to prepare:
(1) from silica sand reclaim equiment dust collect plant, sieve the regeneration ash of 3 μm ~ 20 μm;
(2) prepare burden, take silica sand casting regeneration grey 70kg, mud 5kg, flyash 5kg and stalk 5kg, combined grinding;
(3) to ingredient water in mixed material, granulation is carried out by mist projection granulating tower;
(4) roasting is carried out to wet granular; First carry out preheating and baking 20 minutes at 500 DEG C, and then carry out high-temperature roasting 1h at 1100 DEG C;
(5) come out of the stove cooling, finished product sizing screening, obtains porous adsorbing medium.
The porous adsorbing medium relevant parameter of the present embodiment gained is: its relative density is 2.5 ~ 2.6, and porosity is 75% ~ 78%, and average grain diameter is 5 ~ 6mm.PH value in water is in neutral, and specific area is large, is conducive to attachment and the growth of active sludge microorganism, and then purifies waste water in sewage, makes water quality become clear.
Embodiment 3
Batching: silica sand casting regeneration grey 80kg, mud 15kg, flyash 15kg, active carbon 10kg and cormophyte particle 10kg.
Porous adsorbing medium described in the present embodiment adopts following preparation method to prepare:
(1) from silica sand reclaim equiment dust collect plant, sieve the regeneration ash of 3 μm ~ 20 μm;
(2) prepare burden, take silica sand casting regeneration grey 80kg, mud 15kg, flyash 15kg, active carbon 10kg and cormophyte particle 10kg, combined grinding;
(3) to ingredient water in mixed material, granulation is carried out by mist projection granulating tower;
(4) roasting is carried out to wet granular; First carry out preheating and baking 45 minutes at 600 DEG C, and then carry out high-temperature roasting 2h at 1200 DEG C;
(5) come out of the stove cooling, finished product sizing screening, obtains porous adsorbing medium.
The porous adsorbing medium relevant parameter of the present embodiment gained is: its relative density is 2.4 ~ 2.6, and porosity is 75% ~ 76%, and average grain diameter is 4 ~ 5mm.PH value in water is in neutral, and specific area is large, is conducive to attachment and the growth of active sludge microorganism, and then purifies waste water in sewage, makes water quality become clear.
Embodiment 4
Batching: silica sand casting regeneration grey 72kg, mud 8kg, flyash 8kg, active carbon 4kg and stalk 6kg.
Porous adsorbing medium described in the present embodiment adopts following preparation method to prepare:
(1) from silica sand reclaim equiment dust collect plant, sieve the regeneration ash of 3 μm ~ 20 μm;
(2) prepare burden, take silica sand casting regeneration grey 72kg, mud 8kg, flyash 8kg, active carbon 4kg and stalk 6kg, combined grinding;
(3) to ingredient water in mixed material, granulation is carried out by mist projection granulating tower;
(4) roasting is carried out to wet granular; First carry out preheating and baking 35 minutes at 520 DEG C, and then carry out high-temperature roasting 1h at 1100 DEG C;
(5) come out of the stove cooling, finished product sizing screening, obtains porous adsorbing medium.
The porous adsorbing medium relevant parameter of the present embodiment gained is: its relative density is 2.5 ~ 2.6, and porosity is 76% ~ 78%, and average grain diameter is 5 ~ 6mm.PH value in water is in neutral, and specific area is large, is conducive to attachment and the growth of active sludge microorganism, and then purifies waste water in sewage, makes water quality become clear.
Embodiment 5
Batching: silica sand casting regeneration grey 76kg, mud 12kg, flyash 12kg, active carbon 8kg and cormophyte particle 8kg.
Porous adsorbing medium described in the present embodiment adopts following preparation method to prepare:
(1) from silica sand reclaim equiment dust collect plant, sieve the regeneration ash of 3 μm ~ 20 μm;
(2) prepare burden, take silica sand casting regeneration grey 76kg, mud 12kg, flyash 12kg, active carbon 8kg and cormophyte particle 8kg, combined grinding;
(3) to ingredient water in mixed material, granulation is carried out by mist projection granulating tower;
(4) roasting is carried out to wet granular; First carry out preheating and baking 45 minutes at 600 DEG C, and then carry out high-temperature roasting 2h at 1200 DEG C;
(5) come out of the stove cooling, finished product sizing screening, obtains porous adsorbing medium.
The porous adsorbing medium relevant parameter of the present embodiment gained is: its relative density is 2.4 ~ 2.5, and porosity is 75% ~ 77%, and average grain diameter is 4 ~ 5mm.PH value in water is in neutral, and specific area is large, is conducive to attachment and the growth of active sludge microorganism, and then purifies waste water in sewage, makes water quality become clear.
Test example 1
Porous adsorbing medium is used for the filler of municipal wastewater process biofilter (BAF)
(1) volume of porous adsorbing medium that embodiment 1 obtains accounts for about 70% of BAF;
(2) amount of inlet water is 2L/h;
(3) water sample takes from sewage treatment plant inflow;
(4) treatment effect is as following table:
The clearance not adding the COD of the BAF of how empty adsorbing medium, BOD, ammonia nitrogen and turbidity does not all reach 20%, and adds rear clearance about 80%.In addition, the porous adsorbing medium obtained with other embodiments of the invention repeats above-mentioned test, obtains identical test conclusion, wherein best with the treatment effect of porous adsorbing medium described in embodiment 1.
Test example 2
River clear water apparatus system filler
(1) volume of porous adsorbing medium that embodiment 1 obtains accounts for river clear water system volume
About 10%;
(2) amount of inlet water is 180L/h;
(3) water sample turbidity is comparatively large, opaque time even;
(4) test is mainly for the process of turbidity of sewage, and process index is as following table:
| Index | Turbidity NTU | pH | Stink |
| Water inlet | Opaque | 7.0 | Obviously |
| Water outlet | 25±10 | 7.0 | Nothing |
After adding embodiment 1 gained porous adsorbing medium, delivery turbidity obviously reduces, and water quality becomes clear, retains a large amount of suspended material simultaneously.In addition, the porous adsorbing medium obtained with other embodiments of the invention repeats above-mentioned test, obtains identical test conclusion, wherein best with the treatment effect of porous adsorbing medium described in embodiment 1.
Test example 3 porous adsorbing medium, volcanic rock, flame stone and haydite biofilm effect Comparability test
The present embodiment gets sanitary sewage as subjects, the adsorption treatment effect of the porous adsorbing medium embodiment of the present invention 1 obtained and volcanic rock, flame stone and haydite is made comparisons, result of the test shows, when treatment conditions are identical, it is shorter that porous adsorbing medium of the present invention is used for the biomembrane filter tank biofilm time; The biomembrane difficult drop-off hung up, biological and chemical properties is more stable; Have less suspension, turbidity is minimum.The sewage of contrast test takes from Beijing's sewage treatment plant inflow, and biofilm time, turbidity and water outlet COD clearance see the following form:
Above embodiment is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (11)
1. for a porous adsorbing medium for water treatment, it is characterized in that: described porous adsorbing medium is prepared from by the raw material comprising following consumption: the grey 70-80 part of silica sand casting regeneration, mud 5-15 part, flyash 5-15 part, active carbon 0-10 part and cormophyte particle 5-10 part.
2. porous adsorbing medium as claimed in claim 1, it is characterized in that, described cormophyte is stalk.
3. porous adsorbing medium as claimed in claim 1, it is characterized in that, described porous adsorbing medium is prepared from by the raw material comprising following consumption: the grey 72-76 part of silica sand casting regeneration, mud 8-12 part, flyash 8-12 part, active carbon 4-8 part and cormophyte particle 6-8 part.
4. the porous adsorbing medium as described in any one of claim 1-3, is characterized in that, the described grey granularity of silica sand casting regeneration is 3 μm ~ 20 μm.
5. porous adsorbing medium as claimed in claim 4, is characterized in that, the described grey granularity of silica sand casting regeneration is 10 μm ~ 20 μm.
6. the porous adsorbing medium as described in any one of claim 1-3, is characterized in that, described mud is the excess sludge that sewage biological treatment system is arranged outward.
7. the porous adsorbing medium as described in any one of claim 1-3, is characterized in that, 20 ~ 40 mesh sieves crossed by described cormophyte particle.
8. the porous adsorbing medium as described in any one of claim 1-3, is characterized in that, the relative density of described porous adsorbing medium is 2.4 ~ 2.6, and porosity is 75% ~ 80%, and average grain diameter is 4 ~ 6mm.
9. the preparation method of the porous adsorbing medium described in any one of claim 1-8, is characterized in that, comprise the steps:
(1) screening regeneration ash from silica sand reclaim equiment dust collect plant;
(2) prepare burden, take silica sand casting regeneration ash, mud, flyash, active carbon and cormophyte particle, combined grinding;
(3) to ingredient water in mixed material, granulation is carried out by mist projection granulating tower;
(4) roasting is carried out to wet granular; First carry out preheating and baking 20-45 minute at 500 ~ 600 DEG C, and then carry out high-temperature roasting 1 ~ 2h at 1100 ~ 1200 DEG C;
(5) come out of the stove cooling, finished product sizing screening, obtains porous adsorbing medium.
10. preparation method as claimed in claim 9, is characterized in that: described mist projection granulating tower evaporated quantity of water is 200kg/h; First carry out preheating and baking 0.5h at 500 ~ 600 DEG C after granulation, and then carry out high-temperature roasting 1.5h at 1150 DEG C.
The application of porous adsorbing medium in water treatment described in 11. any one of claim 1-8.
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| CN105000603A (en) * | 2015-07-24 | 2015-10-28 | 刘雷 | Multi-effect sewage treatment agent and method for treating sewage by using same |
| CN105016452A (en) * | 2015-07-24 | 2015-11-04 | 刘雷 | Sewage treating agent and method for treating sewage by using same |
| CN105645502B (en) * | 2015-12-30 | 2018-05-22 | 中国环境科学研究院 | A kind of porous media material and preparation method thereof |
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| CN108726622A (en) * | 2018-05-29 | 2018-11-02 | 佛山市盟发净水科技有限公司 | A kind of activated carbon filter |
| CN111848124A (en) * | 2020-07-16 | 2020-10-30 | 江苏碳峰新材料科技有限公司 | Method for co-treating heavily polluted soil by waste activated carbon and preparing ceramsite |
| CN111908751A (en) * | 2020-08-10 | 2020-11-10 | 深圳绿百洲环保生物科技有限公司 | Sludge deodorization treatment method based on multilayer microorganism composite bacterial filler |
| CN114682209A (en) * | 2020-12-25 | 2022-07-01 | 柳州柳晶环保科技有限公司 | Method for preparing adsorbing material by using coal dust-containing casting dust and adsorbing material |
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Address after: 246600, No. 1, general road, Yuexi Economic Development Zone, Anqing, Anhui Patentee after: Anhui Renchuang ecological environmental Polytron Technologies Inc Address before: 100085 room B, block B509, Jiahua building, No. 9, 3rd Street, Beijing, Haidian District Patentee before: Beijing Rechsand Ecological Environment Protection Science and Technology Co., Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 246600, No. 1, general road, Yuexi Economic Development Zone, Anqing, Anhui Patentee after: Renchuang ecological environmental protection Polytron Technologies Inc Address before: 246600, No. 1, general road, Yuexi Economic Development Zone, Anqing, Anhui Patentee before: Anhui Renchuang ecological environmental Polytron Technologies Inc |