CN106565209A - Preparation method of modified multisource wasted mud ceramsite - Google Patents
Preparation method of modified multisource wasted mud ceramsite Download PDFInfo
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- CN106565209A CN106565209A CN201610936460.4A CN201610936460A CN106565209A CN 106565209 A CN106565209 A CN 106565209A CN 201610936460 A CN201610936460 A CN 201610936460A CN 106565209 A CN106565209 A CN 106565209A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 26
- 239000010802 sludge Substances 0.000 claims description 53
- 239000000463 material Substances 0.000 claims description 23
- 238000004017 vitrification Methods 0.000 claims description 20
- 239000002699 waste material Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 15
- 239000010902 straw Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000010881 fly ash Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000005245 sintering Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 238000005469 granulation Methods 0.000 claims description 6
- 230000003179 granulation Effects 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 8
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 2
- 239000000758 substrate Substances 0.000 abstract 3
- 238000001354 calcination Methods 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000003837 high-temperature calcination Methods 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- 230000035939 shock Effects 0.000 abstract 1
- 239000004927 clay Substances 0.000 description 7
- 238000002156 mixing Methods 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 239000010865 sewage Substances 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000000706 filtrate Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- 206010013786 Dry skin Diseases 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000004162 soil erosion Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1321—Waste slurries, e.g. harbour sludge, industrial muds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/135—Combustion residues, e.g. fly ash, incineration waste
- C04B33/1352—Fuel ashes, e.g. fly ash
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/009—Porous or hollow ceramic granular materials, e.g. microballoons
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/94—Products characterised by their shape
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Dispersion Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a preparation method of a modified multisource wasted mud vitrified substrate. The preparation method comprises the following steps: (1) raw materials are pretreated; (2) raw material pallets are prepared; (3) the raw material pallets are dried; and (4) calcination is carried out. The preparation method has the following advantages: 1, disposal on multisource wasted mud is realized, the production cost is low, and the preparation method has high environmental and economic benefits; 2, the vitrified substrate after high-temperature calcination has low contents of chloride ions and soluble salt, and moisture absorption, scumming and corrosion phenomena of the traditional similar vitrified substrate can not happen; and 3, the preparation method has the characteristics that the film hanging cycle is short, removal rates of ammonia nitrogen, COD, and total nitrogen are high when a biological film is mature, and the shock load resistance is high.
Description
Technical field
The present invention relates to a kind of preparation method of modified multi-source waste sludge haydite, belongs to environment-friendly materials technical field.
Background technology
The exploitation of marine economy has driven the fast development of coast area industry and sea transport industry with building.It is same with this
When, in the Process of Engineering Construction such as Marine shoal exploitation, bridge spanning the sea, waterway dredging are carried out, a large amount of seas of dredger extraction are become silted up
Mud is stored up in the waters in coastal all kinds of harbours and harbour, it would be highly desirable to effectively processed and treatment approach.Sea mud belongs to secondary clay,
Granule is thinner, and this causes sea mud to possess plasticity of good performance, but is very easy to introduce other in sea mud migration process
There is certain difference because of the difference in marine site in impurity, chemical composition, but for the sea mud of a certain specific region, it
Mineral composition and chemical composition or relatively stable.Therefore, for certain area, using the stability of extra large mud
It is feasible that shape feature develops the more stable recycling product of performance.
Meanwhile, as social economy and the fast development of urbanization, municipal sewage amount also increase in aggravation, sludge is city
The garbage that sewage disposal process is unavoidably produced, sludge have three kinds of forms such as cotton-shaped of solid-state, semisolid and liquid, sludge
In not only contain various organic and inorganic granules, while also containing microorganism, virus, heavy metal and pathogen etc., if can not
Process proper, serious pollution will necessarily be produced.A large amount of sludge appropriation of land that sewage disposal process is produced, rancid unpleasant
Meanwhile, also pollute soil and groundwater.It is also China's field of sludge treatment to find rationally effective municipal sludge disposal options
The problem widely paid close attention to.
Additionally, agricultural production process produces substantial amounts of straw, and the straw for producing in a large number is incinerated, and not only causes resource
Waste, also pollute air, affect the health of people.The disposal of straw is also the big problem that annoying base-level countryside in recent years.
For the process of municipal sludge, by high-temperature roasting, remove or stabilized sludge in harmful substance, prepare haydite and be
One of approach for wherein receiving publicity.There is many differences using the method for sludge and desilting sea mud baking ceramsite in prior art,
Though can successfully be obtained and meet national light-weight aggregate standard（GB/T 1743.1-1998）Ceramic product, but used clay or
Person's stone powder is used as main auxiliary material, the primary raw material even as roasting haydite having；Clay or adding for stone powder will be consumed
Take substantial amounts of non-renewable resources, take in a large number or even can cause soil erosion, destruction ecological environment etc. of clay affect even
Disaster, therefore country has put into effect relevant regulations control using vitrified bond haydite.
Such as industrial safety and environmentally friendly [J], 2015 mention a kind of manufacture method of waste sludge Pottery product, with desilting sea mud are
Primary raw material, fills appropriate municipal sludge and Calcium Carbonate, according to sea mud：Sludge：Calcium Carbonate mass ratio is 5:4:1st, raw material are controlled
105 DEG C of dryings of ball, 350 DEG C of preheating temperature, burn 1120 DEG C of swollen temperature, sintering time 12min under conditions of higher-strength is obtained
Pottery product, but this haydite particles density is larger, and porosity is less than normal so that Pottery product is of limited application, because at water
It is used for the haydite of filtrate in reason field, while needs with some strength, possesses preferable porosity and specific surface area.
The content of the invention
It is an object of the invention to provide one kind can make full use of the difference garbage such as desilting sea mud, municipal sludge, straw
Character complementary characteristic, the method for not expending clay resource and preparing haydite of good performance, solve traditional haydite and prepare row
Because of consumption clay, the land used between building material industry and agricultural strives native problem to industry, reaches the purpose of resource recycling.
Technical scheme used by of the invention is：A kind of preparation method of modified multi-source waste sludge vitrification base material, including following step
Suddenly：
（1）Pretreatment of raw material：Desilting sea mud and municipal sludge dehydrate are subsequently crushed to into 100 20% ~ 30% to moisture content
Below mesh；
（2）It is prepared by raw material ball：Desilting sea mud, municipal sludge, flyash and straw after pretreatment are uniformly mixed according to a ratio, are added
6 ~ 8% water is simultaneously put into granulator granulation, filters out the raw material ball that a bulb diameter is 9 ~ 11mm；
（3）Dried raw material ball；
（4）Roasting：Burn swollen technique and be obtained using rapidly heating up and burn swollen vitrification base material.
The invention has the advantages that：
1. the disposal of multi-source waste sludge is not only realized, and is opened including the multi-source waste sludge such as desilting sea mud, municipal sludge
Resource new way, waste recycling；Raw materials used to be garbage, production cost is little, with higher environment and economic effect
Benefit；
2. make full use of the character complementary characteristic of the difference garbage such as desilting sea mud, municipal sludge, straw, flyash, do not expend
Clay resource and prepare haydite of good performance, by rationally control material rate and sintering process so that the haydite of sintering
There is while with higher-strength preferable porosity and specific surface area；
3. when preparing multi-source waste sludge haydite after accurate measurement and adjustment formula proportion, required sintering temperature is 1120 DEG C,
It is low compared to the sintering temperature of other vitrification base materials 50 DEG C ~ 70 DEG C, save the energy；
4. the vitrification base material after high-temperature roasting, chloride ion, soluble-salt content are relatively low, are not in the similar vitrification base of tradition
Material moisture absorption, scum and corrosivity phenomenon；
5., when water treatment filter material is used as, under the conditions of controlling suitable temperature, dissolved oxygen concentration and C/N ratios prepared by the present invention
Modified multi-source waste sludge vitrification filtrate when having biofilm cycle is short, biomembrane ripe to ammonia nitrogen, COD, total nitrogen clearance compared with
It is high, the characteristics of capacity of resisting impact load is strong.
Specific embodiment
A kind of preparation method of modified multi-source waste sludge vitrification base material, comprises the steps：
（1）Pretreatment of raw material：Desilting sea mud and municipal sludge dehydrate are subsequently crushed to into 100 20% ~ 30% to moisture content
Below mesh；
（2）It is prepared by raw material ball：Desilting sea mud, municipal sludge, flyash and straw after pretreatment are uniformly mixed according to a ratio, are added
6 ~ 8% water is simultaneously put into granulator granulation, filters out the raw material ball that a bulb diameter is 9 ~ 11mm；
（3）Dried raw material ball；
（4）Roasting：Burn swollen technique and be obtained using rapidly heating up and burn swollen vitrification base material.
The step（1）In baking temperature be 100 DEG C ~ 105 DEG C, drying time be 4 to 6 hours.
The step（2）In desilting sea mud, municipal sludge according to percent mass ratio be respectively desilting sea mud 70% ~
90%th, municipal sludge 10% ~ 30%, flyash and straw account for the addition of waste sludge mass percent 5% ~ 10% by content.
The step（4）In rapidly intensification burn swollen condition and be：10 DEG C of pre-heating temperature elevation speed ~ 20 DEG C/min, preheating temperature
350 DEG C ~ 400 DEG C, preheating time 15min ~ 20min, 6 ~ 12min of roasting time, 1020 DEG C ~ 1100 DEG C of sintering temperature.
Embodiment：It is to illustrate vitrification base material preparation process and obtained vitrification base material properties and characteristicses.
Sludge takes from the sludge of Nanjing middle bar sewage treatment plant dehydration machine room, and it is clear that sea mud takes from Lianyun Harbour shore reclamation
Silt sea mud, two kinds of waste sludge chemical compositions are as follows：Desilting sea mud：SiO257.10%th, Al2O317.30%th, Fe2O311.30%th,
CaO3.10%, MgO2.17%, K2O4.01%, Na2O3.10%；Sludge：SiO221.37%th, Al2O310.90%th,
Fe2O39.37%th, CaO8.83%, MgO7.68%, K2O1.32%, Na2O0.36%.
:Embodiment 1：
During enforcement, sludge, desilting sea mud are put into into drying baker first, are dried at 105 DEG C, by sludge, desilting sea mud pulverizer
100 mesh sieves are crossed after being crushed, desilting sea mud 900g, municipal sludge 100g, straw 50g, flyash 50g, input is weighed respectively
Batch mixing basin shakes up, and adds suitable quantity of water uniformly to be mixed again, utilizes granulator granulation, obtain raw material ball, raw material ball after mixing
6h is dried at 105 DEG C, 15 DEG C/min of heating rate is controlled, and after 15min being preheated under the conditions of 400 DEG C, is transferred quickly to 1050
Roasting 6min in DEG C high temperature Muffle furnace, roasting terminate after in Muffle furnace according to 10 DEG C/min of rate of temperature fall be down to after 500 DEG C from
So cool down, obtain vitrification base material, Jing tests, its comprcssive strength is 3.37Mpa, expansion multiple 2.3, hour water absorption rate is
18.00%, bulk density is 280Kg/m3, its soluble-salt content is as follows：K+ 0.02‰、Ca2+0.21‰、Na+0.03‰、
SO4 2-0.00‰、CO3 2-0.22‰、Cl-0.00‰。
Embodiment 2：
During enforcement, sludge, desilting sea mud are put into into drying baker first, are dried at 105 DEG C, by sludge, desilting sea mud pulverizer
100 mesh sieves are crossed after being crushed, desilting sea mud 800g, municipal sludge 200g, straw 50g, flyash 50g, input is weighed respectively
Batch mixing basin shakes up, and adds 7% tap water uniformly to be mixed again, utilizes granulator granulation, obtain raw material ball, raw material after mixing
Ball is dried 6h at 105 DEG C, controls 15 DEG C/min of heating rate, after preheating 20min, is transferred quickly under the conditions of 350 DEG C
5 ~ 8min of roasting in 1100 DEG C of high temperature Muffle furnaces, roasting are down to 500 according to 10 DEG C/min of rate of temperature fall after terminating in Muffle furnace
Natural cooling after DEG C, obtains vitrification base material, Jing tests, and its cylindrical compress strength is 4.7Mpa, expansion multiple 1.8, and hour water absorption rate is
13.57%, bulk density is 379Kg/m3, its soluble-salt content is as follows：K+ 0.04‰、Ca2+0.21‰、Na+0.06‰、
SO4 2-0.00‰、CO3 2-0.12‰、Cl-0.00‰。
Embodiment 3：
During enforcement, sludge, desilting sea mud are put into into drying baker first, are dried at 105 DEG C, by sludge, desilting sea mud pulverizer
100 mesh sieves are crossed after being crushed, desilting sea mud 700g, municipal sludge 300g, straw 50g, flyash 50g, input is weighed respectively
Batch mixing basin shakes up, and adds 7% tap water uniformly to be mixed again, utilizes granulator granulation, obtain raw material ball, raw material after mixing
Ball is dried 6h at 105 DEG C, controls 15 DEG C/min of heating rate, after preheating 20min, is transferred quickly under the conditions of 350 DEG C
Roasting 12min ~ 15min in 1020 DEG C of high temperature Muffle furnaces, roasting are dropped according to 10 DEG C/min of rate of temperature fall after terminating in Muffle furnace
The natural cooling to after 500 DEG C, obtains vitrification base material, Jing tests, and its cylindrical compress strength is 3.8Mpa, and expansion multiple 1.5, hour absorb water
Rate is 13.00%, and bulk density is 455Kg/m3。
Embodiment 4：To illustrate that vitrification base material is used for the biofilm and water treatment efficiency of water treatment filter material.
Control temperature for 25 DEG C, dissolved oxygen concentration be 1.5 ~ 2.0mg/L, C/N ratios be 10 or so when, according to the present invention and
The modified multi-source waste sludge vitrification filtrate that in embodiment 1 prepared by obtained raw material, with biofilm cycle is short（7 ~ 10 days）, biomembrane
It is higher to the clearance of ammonia nitrogen, COD, total nitrogen when ripe（Highest clearance is ammonia nitrogen：94.0%；COD：96.4%；Total nitrogen：
81.4%）, capacity of resisting impact load it is strong, can be used as a kind of efficient biofilm carrier of new municipal sewage.
Claims (4)
1. a kind of preparation method of modified multi-source waste sludge vitrification base material, it is characterised in that the method comprises the steps：
（1）Pretreatment of raw material：Desilting sea mud and municipal sludge dehydrate are subsequently crushed to into 100 20% ~ 30% to moisture content
Below mesh；
（2）It is prepared by raw material ball：Desilting sea mud, municipal sludge, flyash and straw after pretreatment are uniformly mixed according to a ratio, are added
6 ~ 8% water is simultaneously put into granulator granulation, filters out the raw material ball that a bulb diameter is 9 ~ 11mm；
（3）Dried raw material ball；
（4）Roasting：Burn swollen technique and be obtained using rapidly heating up and burn swollen vitrification base material.
2. the preparation method of a kind of modified multi-source waste sludge vitrification base material according to claim 1, it is characterised in that described
Step（1）In baking temperature be 100 DEG C ~ 105 DEG C, drying time be 4 to 6 hours.
3. the preparation method of a kind of modified multi-source waste sludge vitrification base material according to claim 1, it is characterised in that described
Step（2）In desilting sea mud, municipal sludge according to mass percent be respectively desilting sea mud 70% ~ 90%, municipal sludge 10% ~
30%th, flyash and straw account for the addition of waste sludge mass percent 5% ~ 10% by content.
4. the preparation method of a kind of modified multi-source waste sludge vitrification base material according to claim 1, it is characterised in that described
Step（4）In rapidly intensification burn swollen condition and be：10 DEG C/min of pre-heating temperature elevation speed, 400 DEG C of preheating temperature, preheating time
15min, roasting time 12min, 1120 DEG C of sintering temperature.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108794047A (en) * | 2018-07-26 | 2018-11-13 | 株洲时代新材料科技股份有限公司 | Sludge, bed mud and garden garbage mixing gasifying prepare the method and product of haydite |
| CN110317040A (en) * | 2019-07-04 | 2019-10-11 | 湖南双红农科生态工程有限公司 | A kind of preparation method of novel ceramsite and the application in black and odorous water |
| CN114988561A (en) * | 2022-06-30 | 2022-09-02 | 江西全兴化工填料有限公司 | Method for coating and modifying surface of chemical sludge-based filler |
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