CN102524160B - Water treatment system adopting molecular sieves prepared from flyash of power plants for filtration - Google Patents
Water treatment system adopting molecular sieves prepared from flyash of power plants for filtration Download PDFInfo
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- CN102524160B CN102524160B CN201210012501.2A CN201210012501A CN102524160B CN 102524160 B CN102524160 B CN 102524160B CN 201210012501 A CN201210012501 A CN 201210012501A CN 102524160 B CN102524160 B CN 102524160B
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- molecular sieve
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- flyash
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- 239000002808 molecular sieve Substances 0.000 title claims abstract description 101
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 title claims abstract description 101
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 238000001914 filtration Methods 0.000 title claims abstract description 70
- 239000010881 fly ash Substances 0.000 title claims abstract description 43
- 238000005273 aeration Methods 0.000 claims abstract description 38
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 20
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 10
- 239000010457 zeolite Substances 0.000 claims abstract description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000001556 precipitation Methods 0.000 claims abstract description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 4
- 239000011574 phosphorus Substances 0.000 claims abstract description 4
- 238000004062 sedimentation Methods 0.000 claims description 30
- 238000009395 breeding Methods 0.000 claims description 20
- 230000001488 breeding effect Effects 0.000 claims description 20
- 238000002425 crystallisation Methods 0.000 claims description 17
- 230000008025 crystallization Effects 0.000 claims description 17
- 239000004115 Sodium Silicate Substances 0.000 claims description 16
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 16
- 241000894006 Bacteria Species 0.000 claims description 15
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 12
- 238000012258 culturing Methods 0.000 claims description 11
- KMNWCNNLFBCDJR-UHFFFAOYSA-N [Si].[K] Chemical compound [Si].[K] KMNWCNNLFBCDJR-UHFFFAOYSA-N 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- 238000010298 pulverizing process Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 5
- 239000000084 colloidal system Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 4
- 239000012265 solid product Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 2
- JEWHCPOELGJVCB-UHFFFAOYSA-N aluminum;calcium;oxido-[oxido(oxo)silyl]oxy-oxosilane;potassium;sodium;tridecahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.O.O.O.[Na].[Al].[K].[Ca].[O-][Si](=O)O[Si]([O-])=O JEWHCPOELGJVCB-UHFFFAOYSA-N 0.000 claims description 2
- 238000010304 firing Methods 0.000 claims description 2
- 239000006148 magnetic separator Substances 0.000 claims description 2
- 229910001743 phillipsite Inorganic materials 0.000 claims description 2
- 238000012805 post-processing Methods 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 8
- 239000002994 raw material Substances 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 3
- 239000002910 solid waste Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003124 biologic agent Substances 0.000 abstract 3
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 238000009360 aquaculture Methods 0.000 description 8
- 244000144974 aquaculture Species 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
- 239000010883 coal ash Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 241000251468 Actinopterygii Species 0.000 description 2
- 229940115440 aluminum sodium silicate Drugs 0.000 description 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 238000012851 eutrophication Methods 0.000 description 2
- 210000003608 fece Anatomy 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000004083 survival effect Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- KEZYHIPQRGTUDU-UHFFFAOYSA-N 2-[dithiocarboxy(methyl)amino]acetic acid Chemical compound SC(=S)N(C)CC(O)=O KEZYHIPQRGTUDU-UHFFFAOYSA-N 0.000 description 1
- 239000004155 Chlorine dioxide Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002068 microbial inoculum Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- NASFKTWZWDYFER-UHFFFAOYSA-N sodium;hydrate Chemical compound O.[Na] NASFKTWZWDYFER-UHFFFAOYSA-N 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention relates to a water treatment system adopting molecular sieves prepared from flyash of power plants for filtration. The system comprises a molecular sieve biological agent filtering pond, a molecular sieve aeration and precipitation filtering pond and a culture pond, wherein the water outlet of the molecular sieve biological agent filtering pond is connected with the water inlet of the culture pond; the water inlet of the molecular sieve aeration and precipitation filtering pond is connected with the water outlet of the culture pond; the molecular sieves in the molecular sieve biological agent filtering pond and/or the molecular sieve aeration and precipitation filtering pond are W-type zeolite molecular sieves prepared from flyash of the power plants; and the silica alumina ratio of the W-type zeolite molecular sieves is 3.2-4.8. The system has the following beneficial effects: nitrogen and phosphorus in culture water bodies in ditch regions can be synchronously removed, the water body quality can be improved, and the water treatment cost is greatly reduced by taking the flyash of the power plants as a raw material to prepare the molecular sieves; and environmental pollution caused by flyash discharge and the treatment cost are reduced to a certain extent by recycling the solid waste flyash of the power plants, thus realizing treatment of wastes by wastes, serving multiple purposes and being suitable for large-scale popularization and application.
Description
Technical field
The present invention relates to a kind of water treatment system, especially a kind of adopt be take the water treatment system that molecular sieve that fly ash in electric power plant makes as raw material filters, and is mainly used in the nitrogen phosphorus Transformatin in the breeding water body of ditch territory.
Background technology
In the cultivation of ditch territory, ditch territory water body has the advantages that downstream plant must be used the aquaculture water after the discharge of upstream plant, therefore, the unordered input of feed and fish medicine, fish faeces the excreta not nonstandard cultivation behavior such as treated direct discharge very easily pollute downstream water body, especially nitrogen and phosphorus pollution etc. causes the eutrophication of water body, not only easily cause the harmful effect to downstream cultivation, as reduce survival rate of fry kind etc., and easily drinking water source is polluted, affect resident's drinking water safety.
At present, the method that ditch territory breeding water body is processed mainly contains: throw in chemical agent, biological-ecological recovery technique, biological floating bed technology, membrane separation technique, stability chlorine dioxide and SBR sewage purification technology etc., but above-mentioned processing method all has some limitations, or narrow application range, or investment, operating cost are high, or management maintenance difficulty, or remove the limited in one's ability of pollutant, not only can not meet day by day strict environmental requirement, be also not suitable for promoting the use of on a large scale simultaneously.
Summary of the invention
In order to overcome the above-mentioned defect of prior art, the object of the present invention is to provide a kind of water treatment system that adopts molecular sieve filtration prepared by fly ash in electric power plant, not only can synchronously effectively remove the nitrogen phosphorus in the breeding water body of ditch territory, improve the water quality of water body, and be to take the molecular sieve that fly ash in electric power plant prepared as raw material due to what adopt, can greatly reduce the cost of water treatment, be suitable for large-scale promotion application, in addition, for the recycling of solid waste fly ash in electric power plant, can also reduce to a certain extent environmental pollution that the discharge of fly ash in electric power plant causes and the cost of processing, can realize the treatment of wastes with processes of wastes against one another, achieve many things at one stroke.
The main technical schemes that the present invention adopts is:
A kind of water treatment system that adopts molecular sieve filtration prepared by fly ash in electric power plant, comprise molecular sieve bacteria agent filtering ponds, molecular sieve aeration and sedimentation filtering ponds and culturing pool, the delivery port of described molecular sieve bacteria agent filtering ponds connects the water inlet of culturing pool, and the water inlet of described molecular sieve aeration and sedimentation filtering ponds connects the discharge outlet of described culturing pool.
Be preferably, also comprise bioflocculation sedimentation basin, the water inlet of described bioflocculation sedimentation basin accesses pending breeding water, and the mud outlet of described bioflocculation sedimentation basin connects water inlet or second entrance of described molecular sieve aeration and sedimentation filtering ponds.
Be preferably, before the water inlet of described bioflocculation sedimentation basin, be provided with drop, biological flocculant can add in described drop place, and the torrent that utilizes pending breeding water to form in drop place is dispersed to described biological flocculant in breeding water.
Be preferably, also comprise artificial swamp, the delivery port of described molecular sieve aerated precipitation tank connects the water inlet of described artificial swamp, and the discharge outlet of described artificial swamp accesses or do not access downstream row ditch, and described artificial swamp is surface current artificial wetland and/or drowned flow artificial wet land.
Be preferably, the water treatment system of molecular sieve filtration prepared by above-mentioned any described employing fly ash in electric power plant, is provided with solar energy aeration machine in described molecular sieve aeration and sedimentation filtering ponds.
Be preferably, the water treatment system of molecular sieve filtration prepared by above-mentioned any described employing fly ash in electric power plant, molecular sieve in described molecular sieve bacteria agent filtering ponds and/or molecular sieve aeration and sedimentation filtering ponds can be the w-type zeolite molecular sieve that adopts fly ash in electric power plant to prepare, silica alumina ratio (referring to atomic molar ratio, lower same) is 3.2～4.8.
Be preferably, the concrete synthesis step of described molecular sieve comprises: (1) powdered coal ash is prepared: according to the content of respective element in fly ash in electric power plant, by interpolation, being prepared burden or do not added in the situation of batching makes the silica alumina ratio in flyash (refer to atomic molar ratio, lower same) be 4.0～7.0, described batching is aluminum sulfate and/or sodium silicate; (2) crystallization after powdered coal ash step (1) being made mixes by certain potassium silicon mol ratio with KOH solution; (3) solid product step (2) crystallization being made through cooling, filtration washing, dry make described molecular sieve.
Be preferably, described potassium silicon mol ratio can be 0.5～3.0.
Be preferably, crystallization temperature can be 80 ℃～180 ℃, and crystallization time can be 5 hours～24 hours.
Be preferably, step (1) is specifically as follows: under stirring condition, it is in 50 ℃～60 ℃, the mass percent concentration sodium silicate solution that is 20%～30% that the aluminum sulfate solution that is 25%～35% by mass percent concentration and fly ash in electric power plant join rapidly temperature, be incubated 4 hours～10 hours, mixing speed is 250 revs/min～350 revs/min, continues to stir or non-lasting stirring.
Be preferably, the particle diameter of described molecular sieve can be 8mm～15mm.
The invention has the beneficial effects as follows:
The present invention adopts molecular sieve bacteria agent filtering ponds to process the aquaculture water entering before culturing pool, not only can utilize molecular sieve effectively to remove the nitrogen phosphorus in aquaculture water, but also can utilize the microbial inoculum that is attached to molecular sieve surface further to purify aquaculture water, effectively improved the water quality of aquaculture water, especially for the plant of downstream, effect is more obvious, has effectively improved the survival rate of fry kind;
In addition, by molecular sieve aeration filtration pond, the discharge water after cultivating is first carried out to aeration and filtration treatment, then after the reparation by artificial swamp, discharged, the pollution of effectively having avoided the discharge water after cultivation to cause the aquaculture water of downstream plant, especially avoided the eutrophication of water body, adopt in addition solar energy aeration machine can also simplify administering and maintaining of system, effectively reduce operation and maintenance cost;
The present invention adopts fly ash in electric power plant as the raw materials of molecular sieve, not only realized the recycling to solid waste flyash, the processing cost of flyash and the environmental pollution that flyash discharge causes have been reduced, what is more important greatly reduces the preparation cost of molecular sieve, effectively reduce the cost that adopts molecular sieve filtration technology to carry out water treatment, molecular sieve filtration technology can be used on a large scale for the filtration treatment of ditch territory breeding water body, realized the treatment of wastes with processes of wastes against one another simultaneously, achieve many things at one stroke, economic benefit and social benefit are remarkable, especially, the present invention in preparing the process of molecular sieve by the setting of specific silica alumina ratio and potassium silicon mol ratio, and in conjunction with specific crystallization condition, make the molecular sieve that makes splendid for the simultaneous removing effect of nitrogen phosphorus, even (as different pH value time) simultaneous removing effect is also more satisfactory under multiple different water quality environment, make the scope of application of molecular sieve filtration technology in water treatment wider.
Accompanying drawing explanation
Fig. 1 is the system architecture schematic diagram of one embodiment of the present of invention;
Fig. 2 is the structural representation of the molecular sieve aeration and sedimentation filtering ponds in one embodiment of the present of invention.
Embodiment
In order better to explain, to better understand, below in conjunction with accompanying drawing, by embodiment, the present invention is described in more detail the present invention.
Referring to Fig. 1 and Fig. 2, the invention provides a kind of water treatment system that adopts molecular sieve filtration prepared by fly ash in electric power plant, comprise molecular sieve bacteria agent filtering ponds 2, molecular sieve aeration and sedimentation filtering ponds 4 and culturing pool 3, the delivery port of described molecular sieve bacteria agent filtering ponds connects the water inlet of culturing pool, and the water inlet of described molecular sieve aeration and sedimentation filtering ponds connects the discharge outlet of described culturing pool.By the water inlet at culturing pool and discharge outlet, molecular sieve filtration is set respectively, not only can eliminate the pollution of upstream water body to cultivating the adverse effect causing, but also can eliminate the pollution that cultivation causes downstream water body, be conducive to improve the water quality of whole ditch territory breeding water body, guarantee the sustainable development of ditch territory cultivation.
Be preferably, also comprise bioflocculation sedimentation basin 1, the water inlet of described bioflocculation sedimentation basin accesses pending breeding water a, water after bioflocculation precipitation process enters molecular sieve bacteria agent filtering ponds again, first pending aquaculture water is carried out to the consumption that bioflocculation precipitation process can reduce molecular sieve bacteria agent filtering ponds, especially can reduce the processing cost of molecular sieve wherein, the mud outlet of described bioflocculation sedimentation basin connects water inlet or second entrance of described molecular sieve aeration and sedimentation filtering ponds.
Be preferably, before the water inlet of described bioflocculation sedimentation basin, be provided with drop, biological flocculant b can add in described drop place, and utilize pending breeding water at the torrent of drop place formation, described biological flocculant to be dispersed in breeding water, by drop setting, can make full use of the dispersion effect that original ground potential difference improves biological flocculant.
Be preferably, also comprise artificial swamp 5, the delivery port of described molecular sieve aerated precipitation tank connects the water inlet of described artificial swamp, can further improve the whole water quality of ditch territory breeding water body by the restoration of the ecosystem of artificial swamp.
Described artificial swamp can be surface current artificial wetland or drowned flow artificial wet land, also the two can be combined with, to obtain better effect.
The discharge outlet of described artificial swamp can access downstream row ditch 6.
Be preferably, the water treatment system of molecular sieve filtration prepared by above-mentioned any described employing fly ash in electric power plant, is provided with solar energy aeration machine in described molecular sieve aeration and sedimentation filtering ponds, to simplify administering and maintaining of system, effectively reduces operation and maintenance cost.
Be preferably, the water treatment system of molecular sieve filtration prepared by above-mentioned any described employing fly ash in electric power plant, molecular sieve in described molecular sieve bacteria agent filtering ponds and/or molecular sieve aeration and sedimentation filtering ponds can be for having the molecular sieve of nitrogen phosphorus simultaneous removing function, for example, it can be the w-type zeolite molecular sieve that adopts fly ash in electric power plant to prepare, not only realized the recovery of flyash, what is more important greatly reduces the preparation cost of molecular sieve, molecular sieve filtration technology can be used on a large scale for the filtration treatment of ditch territory breeding water body, realize the treatment of wastes with processes of wastes against one another.
Molecular sieve area load in described molecular sieve bacteria agent filtering ponds has bacteria agent.
The silica alumina ratio of described w-type zeolite molecular sieve is preferably 3.2～4.8.
Be preferably, the concrete synthesis step of described w-type zeolite molecular sieve comprises: (1) powdered coal ash is prepared: according to the content of respective element in fly ash in electric power plant, by interpolation, prepared burden or do not added that in the situation of batching, to make the silica alumina ratio in flyash be 4.0～7.0, described batching is aluminum sulfate and/or sodium silicate; (2) crystallization after powdered coal ash step (1) being made mixes by certain potassium silicon mol ratio with KOH solution; (3) solid product step (2) crystallization being made through cooling, filtration washing, dry make described molecular sieve.
Be preferably, described potassium silicon mol ratio can be 0.5～3.0.
Be preferably, crystallization temperature can be 80 ℃～180 ℃, and crystallization time can be 5 hours～24 hours.
Adopt above-mentioned specific silica alumina ratio and potassium silicon mol ratio, and in conjunction with above-mentioned specific crystallization condition, the molecular sieve making has the good simultaneous removing effect to nitrogen phosphorus, especially under multiple pH value condition, all can realize good removal effect.
In order to make the powdered coal ash that the uniformity is higher, to realize high conversion ratio when crystallization, be preferably, step (1) is specifically as follows: under stirring condition, it is in 50 ℃～60 ℃, the mass percent concentration sodium silicate solution that is 20%～30% that the aluminum sulfate solution that is 25%～35% by mass percent concentration and fly ash in electric power plant join rapidly temperature, be incubated 4 hours～10 hours, mixing speed can be 250 revs/min～350 revs/min, be preferably 300 revs/min, continue to stir or non-lasting stirring.
Be preferably, the particle diameter of described molecular sieve can be 8mm～15mm, to obtain better filter effect.
Molecular sieve of the present invention can adopt following preferred steps preparation:
(1) pretreatment: elutriation, pulverizing and deironing, the particle diameter after pulverizing is 80 order～800 orders, can adopt highly-effective magnetic separator to carry out deironing after pulverizing;
(2) plastic: it is 25%～35% aluminum sulfate solution that the aluminum sulfate of fly ash in electric power plant weight 0～30% is made to mass percent concentration, it is 20%～30% sodium silicate solution that the sodium silicate of fly ash in electric power plant weight 0～20% is made to mass percent concentration, under the stirring condition of 250 revs/min～350 revs/min, silica alumina ratio by 4.0～7.0 is by appropriate aluminum sulfate solution and through the pretreated fly ash in electric power plant of step (1), to join rapidly temperature be in the sodium silicate solution of 50 ℃～60 ℃, be incubated 4 hours～10 hours, make alumino-silicate colloid;
(3) crystallization: KOH is made to the KOH solution that molar concentration is 1M～5M, and the colloid that the potassium silicon mol ratio by 0.5～3.0 makes step (2) mixes with KOH solution is crystallization 5 hours～24 hours in the baking oven of 80 ℃～180 ℃ or autoclave in temperature;
(4) post processing: the solid product that the suitable process conditions of employing prior art make step (3) crystallization is through cooling, filtration washing, the dry molecular sieve that makes.
Described aluminum sulfate can be preferably 18 water aluminum sulfate for 16 water aluminum sulfate, and described sodium silicate is generally sodium metasilicate, can be non-hydrate sodium metasilicate, can be also anhydrous sodium metasilicate or metasilicate pentahydrate sodium.
Molecular sieve of the present invention can adopt this preferred steps in conjunction with the embodiments 2 and the preferred processing condition preparation of embodiment 3:
Embodiment 2
Embodiment 3
After testing, described w-type zeolite molecular sieve belongs to phillipsite, has a series of four-membered ring in its crystal structure, forms crooked long band between the border of crystal, and main channel is octatomic ring, and free aperture is 4.8 to the maximum.The inclined to one side firing angle of XRD figure demonstration has been located obvious characteristic peak at 12 °, 17 ° and 27 ° and has been occurred, its structural formula is 1.02K
2o:Al
2o
3: 3.65SiO
2: 5.1H
2o.
Be preferably, the water treatment system of molecular sieve filtration prepared by above-mentioned any described employing fly ash in electric power plant, the concrete structure setting of described molecular sieve aeration and sedimentation filtering ponds can be: comprise one or more levels treatment region, at least described in one-level, in treatment region, be provided with aeration half district 41 simultaneously and filter half district 42, the liquid stream of this grade for the treatment of region of flowing through first through aeration halfth district, carry out Air Exposure more after filtration halfth district carry out molecular sieve filtration.
Be preferably, with aeration halfth district in treatment region described in one-level and filtration halfth district, can cut apart by dividing plate 43, the upstream in described aeration halfth district is provided with high-order inlet, downstream is connected with the upstream of filtering halfth district by being located at the bottom overfall 431 of the lower partition, the under-filled described molecular sieve 421 that has energy simultaneous removing nitrogen phosphorus in described filtration halfth district, the packed height of molecular sieve is advisable to cover described bottom overfall completely, and the downstream in described filtration halfth district is provided with high-order overflow outlet 422.
Be preferably, the progression that is provided with described aeration halfth district simultaneously and filters the treatment region in halfth district is some, and the high-order overflow outlet that the high-order overflow outlet that M level is filtered halfth district is connected with the high-order inlet in M+1 level aeration halfth district or M level is filtered halfth district is the high-order inlet in formation M+1 level aeration halfth district directly.
Be preferably, the high-order inlet in first order aeration halfth district is connected to access pending aquaculture water with the delivery port of high-order intake chamber 44 or the delivery port of water pump, most end one-level treatment region is divided into aeration halfth district and liquid storage half district 45 by dividing plate, the two is connected 432 by being located at the top overfall on dividing plate top, and the bottom in described liquid storage halfth district is provided with pure water inlet 451.
Be preferably, totally three grades of described treatment regions (as I, II and III), are provided with solar energy aeration machine 46 in aeration halfth district for the treatment of regions at different levels.
Through applicant's experiment, adopt the present invention to process ditch territory breeding water body, after the processing that is 1.5 hours through hydraulic detention time, the nitrogen and phosphorus content in water can be down to 0.02mg/L by 10.1mg/L respectively, BOD
5and COD
crby 85mg/L, 100mg/L, be down to 10mg/L, 15mg/L respectively.
The molecular sieve of water treatment system of the present invention based on adopting fly ash in electric power plant to prepare carries out filtration treatment, and in conjunction with multiple treatment technology, effectively realized the simultaneous removing to nitrogen phosphorus in the breeding water body of ditch territory, and the application by fly ash in electric power plant when preparing molecular sieve, effectively reduce the cost of water treatment, make water treatment system of the present invention be suitable for promoting the use of on a large scale, the present invention also has the features such as installation, area flexible design, and the nitrogen phosphorus that can be widely used in various ditches territory breeding water body is removed.
Claims (5)
1. a water treatment system that adopts molecular sieve filtration prepared by fly ash in electric power plant, it is characterized in that comprising molecular sieve bacteria agent filtering ponds, molecular sieve aeration and sedimentation filtering ponds and culturing pool, the delivery port of described molecular sieve bacteria agent filtering ponds connects the water inlet of culturing pool, the water inlet of described molecular sieve aeration and sedimentation filtering ponds connects the discharge outlet of described culturing pool, the w-type zeolite molecular sieve of molecular sieve in described molecular sieve bacteria agent filtering ponds and/or molecular sieve aeration and sedimentation filtering ponds for adopting fly ash in electric power plant to prepare, silica alumina ratio is 3.2～4.8
Described w-type zeolite molecular sieve adopts following steps preparation:
(1) pretreatment: elutriation, pulverizing and deironing, the particle diameter after pulverizing is 80 order～800 orders, after pulverizing, adopts highly-effective magnetic separator to carry out deironing;
(2) plastic: it is 25%～35% aluminum sulfate solution that the aluminum sulfate of fly ash in electric power plant weight 0～30% is made to mass percent concentration, it is 20%～30% sodium silicate solution that the sodium silicate of fly ash in electric power plant weight 0～20% is made to mass percent concentration, under the stirring condition of 250 revs/min～350 revs/min, silica alumina ratio by 4.0～7.0 is by appropriate aluminum sulfate solution and through the pretreated fly ash in electric power plant of step (1), to join rapidly temperature be in the sodium silicate solution of 50 ℃～60 ℃, be incubated 4 hours～10 hours, make alumino-silicate colloid;
(3) crystallization: KOH is made to the KOH solution that molar concentration is 1M～5M, and the colloid that the potassium silicon mol ratio by 0.5～3.0 makes step (2) mixes with KOH solution is crystallization 5 hours～24 hours in the baking oven of 80 ℃～180 ℃ or autoclave in temperature;
(4) post processing: adopt solid product that the suitable process conditions of prior art make step (3) crystallization through cooling, filtration washing, the dry molecular sieve that makes,
Described aluminum sulfate is 16 water aluminum sulfate, and described sodium silicate is sodium metasilicate,
Described w-type zeolite molecular sieve belongs to phillipsite, in its crystal structure, there is a series of four-membered ring, between the border of crystal, form crooked long band, main channel is octatomic ring, free aperture is 4.8 to the maximum, the inclined to one side firing angle of XRD figure demonstration has been located obvious characteristic peak at 12 °, 17 ° and 27 ° and has been occurred, its structural formula is 1.02K
2o:Al
2o
3: 3.65SiO
2: 5.1H
2o,
Processing for ditch territory breeding water body, the molecular sieve bacteria agent filtering ponds that employing is prepared with fly ash in electric power plant and/or molecular sieve aeration and sedimentation filtering ponds, after the processing that is 1.5 hours through hydraulic detention time, the nitrogen and phosphorus content in water is down to 0.02mg/L by 10.1mg/L respectively, BOD
5and COD
crby 85mg/L, 100mg/L, be down to 10mg/L, 15mg/L respectively.
2. water treatment system according to claim 1, characterized by further comprising bioflocculation sedimentation basin, the water inlet of described bioflocculation sedimentation basin accesses pending breeding water, and the mud outlet of described bioflocculation sedimentation basin connects water inlet or second entrance of described molecular sieve aeration and sedimentation filtering ponds.
3. water treatment system according to claim 2, it is characterized in that being provided with drop before the water inlet of described bioflocculation sedimentation basin, biological flocculant adds in described drop place, and the torrent that utilizes pending breeding water to form in drop place is dispersed to described biological flocculant in breeding water.
4. water treatment system according to claim 3, characterized by further comprising artificial swamp, the delivery port of described molecular sieve aerated precipitation tank connects the water inlet of described artificial swamp, the discharge outlet of described artificial swamp accesses or does not access downstream row ditch, and described artificial swamp is surface current artificial wetland and/or drowned flow artificial wet land.
5. water treatment system according to claim 1, is characterized in that being provided with solar energy aeration machine in described molecular sieve aeration and sedimentation filtering ponds.
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| CN103755107B (en) * | 2014-02-20 | 2015-03-11 | 刘冬峰 | Urban recycled water deep-treatment method |
| CN107555678B (en) * | 2017-10-27 | 2020-05-19 | 湖南绿网环保科技有限责任公司 | Method for treating waste liquid of silicon-aluminum molecular sieve |
| CN108190911B (en) * | 2018-02-08 | 2021-06-11 | 西安建筑科技大学 | Method for synthesizing multi-level pore block phillipsite |
| CN109804961A (en) * | 2019-03-07 | 2019-05-28 | 中国环境科学研究院 | A kind of continuous-flow type of native country benchmark biological subject raises and train device |
| CN113307286A (en) * | 2021-07-05 | 2021-08-27 | 兰州石化职业技术学院 | Preparation method of fly ash-based W-type zeolite for slow-release fertilizer carrier |
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