CN101607810B - Wastewater treatment composite filler containing zeolite and pulverized fuel ash and preparation method thereof - Google Patents

Wastewater treatment composite filler containing zeolite and pulverized fuel ash and preparation method thereof Download PDF

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Publication number
CN101607810B
CN101607810B CN2009100672559A CN200910067255A CN101607810B CN 101607810 B CN101607810 B CN 101607810B CN 2009100672559 A CN2009100672559 A CN 2009100672559A CN 200910067255 A CN200910067255 A CN 200910067255A CN 101607810 B CN101607810 B CN 101607810B
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zeolite
flyash
solidifying agent
wastewater treatment
water
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CN2009100672559A
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Chinese (zh)
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CN101607810A (en
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刘景明
陈立颖
星成萍
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东北电力大学
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/02Agglomerated materials, e.g. artificial aggregates
    • C04B18/027Lightweight materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00017Aspects relating to the protection of the environment
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention relates to a wastewater treatment composite filler containing zeolite and pulverized fuel ash, which is prepared by non-sintered technique and has the main raw materials of the zeolite and the pulverized fuel ash. The filler is used for treating organic matter, ammonia nitrogen and nitrate nitrogen in the wastewater, and has excellent performance and easily obtained raw materials with low price; the preparation technique of the filler is simple and free from pollution. Zeolite powder with the fineness of 80 meshes and the pulverized fuel ash reaching national first-grade standard are utilized for preparing porous spherical ceramsite type composite filler by a pelletizer, so that the composite filler has high ammonia nitrogen removing rate and better strength and can well meet the requirements of water quality advanced treatment. The preparation technique is simple and free from pollution and opens up a new approach for the utilization of the zeolite and the pulverized fuel ash, thus having the advantages of energy conservation and emission reduction as well as good environmental and economical benefits since the pulverized fuel ash discharged from a thermal power plant can be recycled.

Description

A kind of zeolite and flyash wastewater treatment composite filler and preparation method
Technical field
The present invention is a kind of compounded mix that is applied to wastewater treatment denitrogenation and de-carbon, the compounded mix of the non-sintered porous spherical zeolite ceramsite type of mainly being made up of zeolite, flyash and solidifying agent.Relate to a kind of zeolite and flyash wastewater treatment composite filler specifically.
Technical background
The biomembrance process wastewater processing technology is through the organism in the bio-contact oxidation waste water, ammonia nitrogen and denitrification nitric nitrogen, is the main method of wastewater treatment now.To mikrobe the filler of carrier being provided is the key components of biomembrance process wastewater treatment.The wastewater treatment filler is made up of and form multiple, mainly is divided into soft-filler, semi soft packing and hard filler.
Soft-filler is prone to be entangled with, and can reduce waste water treatment efficiency after use for some time; Although semi soft packing has combined the advantage of soft-filler and hard filler, mainly aspect the two stage biological processing, efficient is not high aspect waste water advanced processing for its waste water treatment applications; Hard filler comprises ceramic mould, glass mould or mud material, and most hard filler effective storage lifes are long, but hang that film is slow, easy blocking, backwash is frequent and the wastewater treatment nitric efficiency is not high.
Zeolite is the moisture silicon aluminate crystal of porousness with tetrahedron skeleton structure; Absorption and ion-exchange performance are preferably arranged; Can remove inorganic and organic pollutant in the waste water effectively; Have higher chemistry and physical stability simultaneously, and low in raw material cost is easy to get, in water treatment field, received extensive concern.All the time, the application of zeolite in wastewater treatment mainly is the filler as fixed-bed reactor, is only limited to the absorption and the ion exchange of zeolite, adsorbs saturated back and makes it regeneration with the salt solution wash-out.This single zeolite filler can not can only play spissated effect fundamentally with contaminant removal, and the regeneration zeolite causes the waste of resource easily.
The biozeolite technology is the new technology that causes that in recent years a kind of biological materialization that people pay attention to combines; With particulate zeolites as bio-carrier; Utilize the ion exchange of biochemical characteristic and the zeolite of mikrobe, realize the removal of organic and inorganic pollutant in the waste water.New approach has been opened up in the application of zeolite in water treatment that appear as of biozeolite, but the particle shape of zeolite has also been brought difficulty for this technology.Present employed zeolite face shaping is irregular, and bad mechanical strength will certainly cause breakage in various degree and loses its performance in operational process, and direct result can cause the effluent quality disturbance.Voidage is low in addition, and flow resistance is big, is prone to cause obstruction.Therefore seek to improve zeolite properties technology and method, optimize its each item physical and chemical index and performance perameter has great significance.
Flyash is a kind of seemingly pozzolana mixed material that coal dust forms behind high-temp combustion among the present invention; Staple is silicon-dioxide, aluminium sesquioxide, red oxide of iron, quicklime and uncompleted burned carbon, has organic ability in big surface-area and the planar water.The comprehensive utilization of flyash, turning waste into wealth, turning bane into boon has become important techniques economic policy in China's economic construction.Therefore; The logical repeatedly practice of the present invention shows: the non-sintered combined filler that zeolite, flyash and solidifying agent are formed has affinity and the stability that combines with mikrobe; The ammonium ion of zeolite ionic adsorption and flyash adsorbed organic matter are that microbial growth provides great nutrition; Thereby fundamentally having changed the microbial growth condition, is the important means that solves contradiction between thermoelectric production environment pollution of China and the resource shortage.As environment-friendly materials, can effectively remove organic and inorganic pollutant in the water.
Summary of the invention
Ultimate principle of the present invention relates generally to the biomembrance process wastewater treatment, through to mikrobe carrier being provided, making ammonia nitrogen, nitric nitrogen and organism in carrier zeolite and flyash IX, the absorption waste water, thereby removes nitrogen and organism in the waste water.
The objective of the invention is to solve the problem that prior art exists, a kind of affinity that combines with mikrobe and stability is good, intensity is high zeolite and flyash wastewater treatment composite filler are provided, remove inorganic and organic pollutant in the waste water effectively.Its preparation technology is simple, and is pollution-free, and the used prices of raw and semifnished materials are cheap, opened up new approach for zeolite and utilization of coal ash simultaneously.
Realize that technical scheme of the present invention is: a kind of zeolite and flyash wastewater treatment composite filler, it is made up of 80 purpose zeolite powders, GB I level flyash, solidifying agent and water; Wherein solidifying agent is by caustic soda NaoH, terra alba CaSO that chemical analysis is pure 42H 2O, 42.5 grades of ordinary Portland cements are formed.According to the mass fraction meter, 23%~33% (the comprising the water that dissolves alkali water and the needed wetting amount of granulation) that 80 purpose zeolite powders are 50~80, GB I level flyash is 10~40, solidifying agent is 5~40, water consumption accounts for total material consumption; The pure terra alba CaSO of caustic soda NaoH and chemical analysis in the solidifying agent 42H 2The mass ratio of O, 42.5 grades of ordinary Portland cements=1~3: 2~4: 3~7 (wt).The zeolite and the flyash compounded mix of the non-coking property porous spherical zeolite ceramsite type of processing, its technical performance index is: tap density 0.81g/cm 3, apparent density 1.42g/cm 3, voidage 42.96%, specific surface area 9.28m 2/ g, wear rate 0.58%, percentage of damage 0.98%, ultimate compression strength 6.57Mpa; Its preparation method is: 80 purpose zeolite powders, GB I level flyash, the solidifying agent of requirement are added in the stirrer, after stirring under 15 ℃~35 ℃, move to the water yield that adds above-mentioned material proportion regulation in the tablets press again, process the pellet of 3mm~6mm; Through quietly stop, normal curing, make non-coking property porous spherical zeolite ceramsite type zeolite and flyash wastewater treatment composite filler.
The preparation method of a kind of zeolite and flyash wastewater treatment composite filler, be made up of following process and step:
Compound the filling out by 80 purpose zeolite powders, GB I level flyash, solidifying agent and water of described zeolite and flyash wastewater treatment formed, and wherein solidifying agent is by caustic soda NaoH, terra alba CaSO that chemical analysis is pure 42H 2O, 42.5 grades of ordinary Portland cements are formed.According to the mass fraction meter, 23%~33% (the comprising the water that dissolves alkali water and the needed wetting amount of granulation) that 80 purpose zeolite powders are 50~80, GB I level flyash is 10~40, solidifying agent is 5~40, water consumption accounts for total material consumption; The pure terra alba CaSO of caustic soda NaoH and chemical analysis in the solidifying agent 42H 2The mass ratio of O, 42.5 grades of ordinary Portland cements=1~3: 2~4: 3~7 (wt).By above-mentioned material proportion regulation, 80 purpose zeolite powders, GB I level flyash, the solidifying agent of requirement is added in the stirrer, after stirring under 15 ℃~35 ℃; Move to the water yield that adds above-mentioned material proportion regulation in the tablets press again; Process the pellet of 3mm~6mm through tablets press after, the quiet 2h~8h that stops put into the water maintenance 20~40 days behind the natural air drying; Then zeolite and the flyash wastewater treatment composite filler that makes carried out performance test, its performance index are: tap density 0.81g/cm 3, apparent density 1.42g/cm 3, voidage 42.96%, specific surface area 9.28m 2/ g, wear rate 0.58%, percentage of damage 0.98%, ultimate compression strength 6.57MPa.In the production of reality, long more between the quiet stopping time, the finite space that takies is many more, also can cause that the haydite of making occurs damaging in this process simultaneously.Short more favourable more between the quiet in principle stopping time, but also will consider from the aspect of performance of filler.The present invention selects non-coking property porous spherical zeolite ceramsite type zeolite and the flyash wastewater treatment composite filler that 2h~8h just can obtain having superperformance between the quiet stopping time.
Zeolite and the maintenance process of flyash wastewater treatment composite filler:
Maintenance process is divided into normal curing and vapor cure.Vapor cure is that the haydite that dries in the shade is naturally put into maintaining box, and maintenance is 24 hours under atmospheric steam, and heat-up rate is no more than 10 ℃/h, and top temperature is no more than 80 ℃; Normal curing is that the haydite that dries in the shade is naturally put into tap water, maintenance 20~40 days.Selection standard method of curing of the present invention.
In sum, the present invention compared with prior art has outstanding substantive distinguishing features, and the advanced treatment of hc effluent is had more positively effect:
(1) utilize zeolite form in moisture silicon aluminate crystal the tetrahedron skeleton structure porousness and ion-exchange performance, high temperature is to the destructiveness of its silicon aluminate crystal in addition; Zeolite and flyash wastewater treatment composite filler that a kind of non-sintering process is processed have been researched and developed; The advantage that can keep zeolite, can remove effectively again in the waste water inorganic with the thing pollutent arranged.
(2) based on the ion-exchange performance of zeolite and the absorption property of flyash, the organic pollutant of spissated ammonia nitrogen of zeolite and flyash absorption is effectively degraded by mikrobe.Because there is the dissolved oxygen gradient in microbial film, ammonia nitrogen can be that carbon source is carried out anti-nitration reaction with the organic pollutant of absorption again after being oxidized to nitric nitrogen.That is to say that zeolite and flyash compounded mix have stronger synchronous nitration and denitrification performance.
(3) in overbasic solution, receive OH when zeolite powder -Erosion the time, its screen work columnar structure begins to decompose, [the SiO (OH) after the depolymerization 3] -[Al (OH) 4] -With Ca 2+The fastening strength that can strengthen zeolite in conjunction with the hydrated calcium silicate (CSH) that forms and drated calcium aluminate (CAH).
(4) at normal temperatures, flyash itself can not harden or harden very slow, but at Ca (OH) 2In the saturated solution; Significant hydration can take place, generate hydrated products such as similar cement CSH gel, absorb heat and emit zeolite water; Promote the continuous aquation of a grog material; Aquation to cement has played from the maintenance effect, makes zeolite formed hole by the space that water occupies simultaneously, has obviously increased the intensity and the surface-area of filler.
(5) the porous spherical zeolite ceramsite---zeolite and the flyash wastewater treatment composite filler haydite that make of the present invention, except having high ammonia nitrogen removal frank, can also obviously improve filler intensity, satisfy water quality advanced treatment requirement.
(6) preparation technology of zeolite of the present invention and flyash wastewater treatment composite filler is simple, and the used prices of raw and semifnished materials are cheap, for zeolite and utilization of coal ash have been opened up new approach; The obvious environmental benefit and the economic benefit that have reduction of discharging, energy-conservation, pollution-free, recycle resource simultaneously.
Description of drawings
Fig. 1 is zeolite of the present invention and the surperficial SEM of flyash wastewater treatment composite filler (porous spherical haydite) (electronic scanning Electronic Speculum) figure;
Fig. 2 is zeolite of the present invention and flyash wastewater treatment composite filler (porous spherical haydite) section SEM figure;
Fig. 3 is an aeration and biological compounded mix filter tank technique schema; Among the figure
The biological filter of 1-1~1-5-header tank 2-1~2-5-post
3-1~3-5-water tank 4-air
5-1~5-5-aerator
Embodiment
Through accompanying drawing and embodiment the present invention is further specified as follows at present:
Embodiment 1: the preparation of zeolite and flyash wastewater treatment composite filler.
The raw materials used zeolite powder of producing available from Jiutai City, Jilin Province zeolite mining company of the present invention; The Jilin is the II level flyash (national I level flyash) of heat power plant's process electric precipitation in a steady stream; 42.5 grades of ordinary Portland cements that Ji Dong cement mill, Jilin produces, the terra alba (CaSO that chemical analysis is pure 42H 2O) and caustic soda (NaOH).
According to the proportioning raw materials that test is confirmed, taking by weighing fineness is NaOH0.3kg, the pure terra alba CaSO of optical analysis in 80 purpose zeolite powder 5kg, GB I level flyash 2kg, the fixing agent 42H 2O0.6kg, 42.5 class g cement 2.1kg, water approximately add 3kg~5kg, (be that institute's water consumption accounts for 23%~33% of total material, wherein, comprise the water that dissolves alkali water and the required wetting amount of granulation).Press above-mentioned raw materials proportioning regulation, with NaOH, the pure terra alba CaSO of optical analysis in 80 purpose zeolite powders of requirement, GB I level flyash, the fixing agent 42H 2O, 42.5 class g cements are added in the stirrer; After stirring under 15 ℃~35 ℃, move to the water yield that adds above-mentioned material proportion regulation in the tablets press again, process the pellet of 3mm~6mm through tablets press after; Quiet 2h~the 8h that stops; Put into the water maintenance behind the natural air drying 20~40 days, and then zeolite and the flyash wastewater treatment composite filler that makes carried out performance test, its performance index are: tap density 0.81g/cm 3, apparent density 1.42g/cm 3, voidage 42.96%, specific surface area 9.28m 2/ g, wear rate 0.58%, percentage of damage 0.98%, ultimate compression strength 6.57MPa.The non-coking property porous spherical zeolite ceramsite type zeolite and the flyash wastewater treatment composite filler that make, its electronic scanning Electronic Speculum figure such as Fig. 1, shown in Figure 2.
Embodiment 1,2,3; The preparation of zeolite of the present invention and flyash wastewater treatment composite filler.
Except that proportioning raw materials sees table 1, all the other preparation processes, step and other processing condition are all with 1 record of embodiment.
Proportioning raw materials (unit: kg) among table 1. embodiment 1~3
Example 1 Example 2 Example 3
80 order zeolite powders (Jiutai City, Jilin Province zeolite mining company) 5.0 6.5 8.0
GB first level flour coal ash (Jilin is heat power plant's electric precipitation II level in a steady stream) 2.0 3.0 4.0
Caustic soda NaOH 0.3 0.6 1.0
The pure terra alba CaSO of chemical analysis 4·2H 2O 0.6 1.38 3.0
42.5 level ordinary Portland cement (Ji Dong cement mill, Jilin) 2.1 4.2 6.6
Water (comprising the water that dissolves alkali water and the required wetting amount of granulation) 3 5 7
Embodiment 4: the filling of zeolite of the present invention and flyash wastewater treatment composite filler (being seated in respectively simultaneously in the identical synthetic glass pillar with other following 4 kinds of fillers).
BAF is made up of pond, filter tank body, filtrate, supporting layer, water distribution system, gas distribution system, back-purge system, outlet system, pipeline and robot control system(RCS).According to the difference of waste water filter type in service in the filter tank, BAF can be divided into upward flow filter and following to the stream filter tank.Except that the flow direction difference of waste water in the filter tank, upward flow filter is basic identical to the pond in stream filter tank type structure and principle of work with down.Zeolite of the present invention and flyash wastewater treatment composite filler, the gac of Tianjin gac factory, the natural zeolite of Jiutai City, Jilin Province zeolite mining company, the sludge ceramsite of Jilin Chemical Industry Company and the biological ceramic particle of Jiangxi Province Pingxiang City biological ceramic particle factory are loaded respectively in the biological filter of 5 synthetic glass post 2-1~2-5 shown in Figure 3, carried out five parallel condition tests simultaneously.Five its internal diameters of the biological filter of identical synthetic glass post 2-1~2-5 are that the high 400mm of being of 80mm, post, effective packed height are 310mm; Bottom is respectively the pebbles bed course of 30mm, 30mm, φ 32mm that 40mm is thick, φ 16mm, φ 8mm size, so that the upper strata filler is played a supporting role; The upper strata is respectively the high aforesaid five kinds of fillers of 200mm.Air is sent to the aeration head 5-1~5-5 that is arranged at reactor bottom after air 4 compressions.System adopts header tank 1-1~1-5 upward flow mode to intake, and sewage is directed at the bottom, pond from header tank and gets into, and in the filter tank, after biological degradation, enters among water tank 3-1~3-5 through water shoot; Waste water in the filter tank and air move with the mode of air water concurrent.
Embodiment 5: the bio-film colonization of zeolite of the present invention and flyash wastewater treatment composite filler (carrying out parallel bio-film colonization simultaneously with other following 4 kinds of fillers).
The biological ceramic particle of the natural zeolite of the gac of zeolite of the present invention and flyash wastewater treatment composite filler and Tianjin gac factory, Jiutai City, Jilin Province zeolite mining company, the sludge ceramsite of Jilin Chemical Industry Company and Jiangxi Province Pingxiang City biological ceramic particle factory; According to embodiment 2 described methods; Fill in respectively in the biological filter of five synthetic glass post; Carry out the preceding bio-film colonization of five parallel condition tests, it installs shown in accompanying drawing 3.
The bio-film colonization of compounded mix is divided into static cultivation and dynamically cultivates two processes.The static cultivation process is: as cultivating water, serves as to hang membrane carrier with zeolite of the present invention and flyash wastewater treatment composite filler, gac (simultaneous test filler), natural zeolite (simultaneous test filler), sludge ceramsite (simultaneous test filler) and biological ceramic particle (simultaneous test filler) with sewage respectively.Each water inlet COD CrConcentration is about 300~500mg/L, NH 3-N concentration is about 30~50mg/L, adds Na simultaneously 2CO 3, basicity 7mmol/L treats COD CrAnd NH 3-N changes water after 70% removal effect is arranged.The back taking-up of one week, the surface of filler grows one deck microbial film equably, under opticmicroscope, observes, and can see has a large amount of light yellow zoogloeas and a small amount of campanularian, promptly hangs the film success.In dynamic culturing process, along with the continuous reduction of sewage ratio, the waste water behind the increase secondary biochemical, water inlet NH 3-N and COD CrConcentration also decrease, the water inlet NH 3-N concentration is about 10.16~37.23mg/L, COD CrConcentration is about 78.93~325.45mg/L, treats COD CrAnd NH 3When-N had an appointment 60% removal effect, dynamically culturing process finished.
Embodiment 6: zeolite is used (carrying out parallel contrast experiment simultaneously with other following 4 kinds of fillers) with the flyash wastewater treatment composite filler
Carry out five parallel condition tests simultaneously with the gac of zeolite of the present invention and flyash compounded mix, Tianjin gac factory, the natural zeolite of Jiutai City, Jilin Province zeolite mining company, the sludge ceramsite of Jilin Chemical Industry Company and the biological ceramic particle of Jiangxi Province Pingxiang City biological ceramic particle factory, its technical process is shown in accompanying drawing 3.
Water inlet NH 3-N concentration is about 10.16~17.23mg/L, COD CrConcentration is about 78.93~85.45mg/L, under GWR is 2: 1~4: 1, the condition of the residence time (HRT) 3~5h, and after zeolite and flyash compounded mix advanced treatment, NH 3-N concentration is reduced to 1.31~2.21mg/L, COD CrConcentration is reduced to 11.74~12.71mg/L.Five kinds of fillers are to NH in the water 3The quality of the clearance of-N is followed successively by gac 71.19%, zeolite and flyash compounded mix 67.13%, biological ceramic particle 65.89%, sludge ceramsite 63.84% and natural zeolite 61.35%; The quality of nitration denitrification clearance is followed successively by zeolite and flyash compounded mix haydite 38.34%, biological ceramic particle 32.66%, gac 32.31%, natural zeolite 30.92% and sludge ceramsite 24.92% simultaneously; To COD in the water CrThe place to go effect be gac 78.73%, zeolite and flyash compounded mix haydite 65.12%, biological ceramic particle 64.84%, sludge ceramsite 60.94% and natural zeolite 59.46% successively.It is thus clear that zeolite and flyash compounded mix have the good denitrogenation and the effect of de-carbon.
Following table has been listed the result of above-mentioned 5 kinds of filler parallel laboratory tests:
Table 2. zeolite of the present invention and flyash wastewater treatment composite filler
With other 4 kinds of filler contrast and experiment:
Zeolite and flyash compounded mix Biological ceramic particle Gac Natural zeolite Sludge ceramsite
COD CClearance 65.12% 64.84% 78.73% 59.46% 60.94%
NH 3-N clearance 67.13% 65.89% 71.19% 61.35% 63.84%
The nitration denitrification clearance 38.34% 32.66% 32.31% 30.92% 24.92%

Claims (2)

1. zeolite and flyash wastewater treatment composite filler, it is made up of 80 purpose zeolite powders, GB I level flyash, solidifying agent and water, and wherein solidifying agent is by caustic soda NaOH, terra alba CaSO that chemical analysis is pure 42H 2O, 42.5 grades of ordinary Portland cements are formed, and according to the mass fraction meter, 80 purpose zeolite powders are 50~80, GB I level flyash is 10~40, solidifying agent is 5~40, water consumption accounts for 23%~33% of total material consumption; The pure terra alba CaSO of caustic soda NaOH and chemical analysis in the solidifying agent 42H 2The mass ratio of O, 42.5 grades of ordinary Portland cements=1~3: 2~4: 3~7; The zeolite and the flyash compounded mix of the non-coking property porous spherical zeolite ceramsite type of processing, its technical performance index is: tap density 0.81g/cm 3, apparent density 1.42g/cm 3, voidage 42.96%, specific surface area 9.28m 2/ g, wear rate 0.58%, percentage of damage 0.98%, ultimate compression strength 6.57MPa; Its preparation method is: by above-mentioned material proportion regulation; 80 purpose zeolite powders, GB I level flyash, the solidifying agent of requirement are added in the stirrer; After stirring under 15 ℃~35 ℃, move to the water yield that adds above-mentioned material proportion regulation in the tablets press again, process the pellet of 3mm~6mm; Through quietly stop, normal curing; Normal curing is that the haydite that dries in the shade is naturally put into tap water, and maintenance 20~40 days makes non-coking property porous spherical zeolite ceramsite type zeolite and flyash wastewater treatment composite filler.
2. the preparation method of zeolite and flyash wastewater treatment composite filler; Be made up of following process and step: zeolite and flyash wastewater treatment composite filler are made up of 80 purpose zeolite powders, GB I level flyash, solidifying agent and water, and wherein solidifying agent is by caustic soda NaOH, terra alba CaSO that chemical analysis is pure 42H 2O, 42.5 grades of ordinary Portland cements are formed; According to the mass fraction meter, 80 purpose zeolite powders are 50~80, GB I level flyash is 10~40, solidifying agent is 5~40, water consumption accounts for 23%~33% of total material consumption; The pure terra alba CaSO of caustic soda NaOH and chemical analysis in the solidifying agent 42H 2The mass ratio of O, 42.5 grades of ordinary Portland cements=1~3: 2~4: 3~7; By above-mentioned material proportion regulation, 80 purpose zeolite powders, GB I level flyash, the solidifying agent of requirement is added in the stirrer, after stirring under 15 ℃~35 ℃; Move to the water yield that adds above-mentioned material proportion regulation in the tablets press again; Process the pellet of 3mm~6mm through tablets press after, the quiet 2h~8h that stops put into the water maintenance 20~40 days behind the natural air drying; Then zeolite and the flyash wastewater treatment composite filler that makes carried out performance test, its performance index are: tap density 0.81g/cm 3, apparent density 1.42g/cm 3, voidage 42.96%, specific surface area 9.28m 2/ g, wear rate 0.58%, percentage of damage 0.98%, ultimate compression strength 6.57MPa.
CN2009100672559A 2009-06-29 2009-06-29 Wastewater treatment composite filler containing zeolite and pulverized fuel ash and preparation method thereof CN101607810B (en)

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