CN106810094A - The system and method for cement joint production sulphur is prepared using municipal waste and Industrial Solid Waste - Google Patents
The system and method for cement joint production sulphur is prepared using municipal waste and Industrial Solid Waste Download PDFInfo
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- CN106810094A CN106810094A CN201710160135.8A CN201710160135A CN106810094A CN 106810094 A CN106810094 A CN 106810094A CN 201710160135 A CN201710160135 A CN 201710160135A CN 106810094 A CN106810094 A CN 106810094A
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- 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
- C04B7/00—Hydraulic cements
- C04B7/32—Aluminous cements
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/02—Preparation of sulfur; Purification
- C01B17/04—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides
- C01B17/0473—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by reaction of sulfur dioxide or sulfur trioxide containing gases with reducing agents other than hydrogen sulfide
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- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Treating Waste Gases (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses the system and method that cement joint production sulphur is prepared using municipal waste and Industrial Solid Waste,The system includes balancing reservoir,Filter press,Drier,Raw grinding unit,Rotary kiln,Cement flour grinding machine,Hot water storage tank,Deduster and reduction fixed bed,Red mud,Wet mud and industry water enter the homogenizing treatment of balancing reservoir and dealkalize,Entering back into filter press carries out press filtration,Solid material after press filtration is dried into drier,After drying fecula proportioning grinding is carried out with desulfurated plaster into raw grinding unit,Material after grinding carries out high-temperature calcination and obtains sulfoaluminate clinker into rotary kiln,Sulfoaluminate clinker carries out combined grinding and obtains sulphate aluminium cement with desulfurated plaster into cement flour grinding machine,Hot water provides heat for balancing reservoir in hot water storage tank,The flue gas containing sulfur dioxide produced in rotary kiln is by deduster dedusting,Reduction obtains sulphur in being delivered to reduction fixed bed.
Description
Technical field
Protected the present invention relates to chemical industry, the comprehensive utilization of resources of building material technique and large Industrial Solid Waste and municipal sludge and environment
Shield improvement field, and in particular to system and the side of sulphate aluminium cement coproduction sulphur are prepared using municipal waste and Industrial Solid Waste
Method.
Background technology
Since reform and opening-up, with the quickening developed rapidly with urbanization process of China's industry, and then produce a large amount of each
Poisonous and hazardous industrial solid castoff is planted, and its quantity is also constantly rising.Large industrial solid castoff, it is referred to as large
Solid waste, refers to that China produces more than the 10000000 tons industrial solids larger to environment and security implication in the field of industrial production middle age
Waste, mainly including red mud, desulfurated plaster, metallurgical slag, CHARACTERISTICS OF TAILINGS SAND and gangue etc..The Eleventh Five-Year Plan period " large solid waste " is always raw
11,800,000,000 tons of yield, always increases 19,000,000,000 tons of storage newly.15,000,000,000 tons of " 12 " period " large solid waste " total growth, total increasing newly is deposited
Measure 27,000,000,000 tons.
Likewise, increase and popularization with China's urban population, municipal sewage treatment difficulty increasingly increases, according to
Official statistics, by by the end of September, 2015,3830 sewage treatment plants, the up to sewage of 1.62 hundred million m3/d have been built up in national cities and towns
Disposal ability, association sludge breaks through 30,000,000 tons/year.And sludge is that a kind of moisture content produced in sewage disposal process is very high
Discarded object, its composition mainly contains the floccule of various microorganisms and organic and inorganic particle composition, poisonous has containing substantial amounts of
Evil material, such as parasitic ovum, pathogenic microorganism and heavy metal ion.In general, the main component after sludge air drying is two
Silica, muscovite, alurgite, phengite, kaolin etc., these mineral crystals are mainly by the metals such as aluminium, iron, magnesium unit
Element composition, and be similar clay, the mineral matter with fines.Sludge pollution thing often has long term toxicity and can not
Degradability, if untreated and unordered discharge, will enter food chain by media such as big gas and water and soil, as dangerous two
Secondary source of pollution, causes harm to human health and ecology.China produces 30,000,000 ton of -4,000 ten thousand tons of moisture content left 80% every year
Right municipal sludge, domestic sludge yield is 35,000,000 tons within 2015.According to《Chinese specific resistance to filtration Market Report
(2016 editions)》Understand, national wet mud harmless treatment rate average value in 2015 be also exist between 32%, with actual demand compared with
Big gap.Therefore, in sewage treatment area, sludge treatment also turns into current a great problem.
Conventional Sludge Disposal Techniques mainly have anaerobic digestion, aerobic fermentation, deep dehydration, heat drying, lime steady at present
Fixed, burning and carbonization etc..But these technologies can not thoroughly, simultaneously realize the minimizing of sludge, stabilisation, it is innoxious with
Resource, always produces many contingency questions, such as the big, technical operating procedure that consumes energy produces effluvium pollution environment, burns tail
The problems such as gas produces toxic gases such as dioxin etc..
Currently in order to carry out recycling to sludge, it is necessary to first carry out deep dehydration to sludge, by the reduction of its moisture content
To 50% or so, but device for dehydrating sladge waste investment is high, and later stage operation and maintenance cost is also higher and causes great lot of water resources wave
Take.
China does not almost have a crude sulfur ore deposit, and sulphur is mainly reclaimed from petroleum refining, natural gas purification, and from coalification
The environmentally friendly accessory substance of the industries such as work, chemical fertilizer production, thermal power generation, non-ferrous metal metallurgy is obtained.Sulphur recovery and vent gas treatment skill
Art develops into the important process technology for having environmental benefit and economic benefit concurrently via simple green technology.Domestic sulphur year
Yield is only more than 1,000 ten thousand tons, and annual consumption is more than 10,000,000 tons, need to be showed tight from about 9,000,000 tons of external import every year
Situation that supply falls short of demand again.At home and abroad sulphur has not been re-used as the byproduct that oil, natural gas are reclaimed at present, but as one
Valuable source is planted in circulation.China uses natural gypsum ore deposit production sulphur typically using natural gypsum ore deposit production sulphur
It is relatively costly, imported sulphur is relied primarily in Chemical Manufacture, cause Sulfur price to rise steadily, improve Chemical Manufacture into
This.
In recent years, sulphate aluminium cement turns into the new direction of domestic and international cement industry research and development, and its clinker has
The required heat consumption of production is low, early strength is high, setting time is short, fabulous freeze-thaw resistance, a series of low superiority of basicity
Can, now it is widely used in repairing, rush construction engineering, winter construction engineering, anticorrosive engineering.Sulphur aluminic acid is produced in the prior art
Basic raw material used by salt cement is lime stone, bauxite and gypsum, and lime stone is mainly to provide sulphur aluminium as calcareous raw material
The calcium oxide component wanted needed for acid salt cement Formation Process of Clinker, bauxite mainly provides aluminium sulfate water as aluminum raw material
The alumina composition wanted needed for mud Formation Process of Clinker；Gypsum mainly provides sulphoaluminate cement clinker shape as sulphur matter raw material
Required sulfur trioxide composition during.In actual production, lime stone is decomposed at 850-900 DEG C, produces CaO
And CO2, CO2The effusion from discarded, needs in preparation process to use substantial amounts of lime stone, institute due to sulphoaluminate cement clinker
So that substantial amounts of CO can be discharged2, the greenhouse effects of environment are exacerbated significantly.
The content of the invention
The large solid waste of China is huge with municipal sludge volume of cargo in storage, high using difficulty, in order that applying few, volume of cargo in storage at present
Extremely abundant city wet mud, red mud and desulfurated plaster are fully used, be used to produce required for architectural engineering it is early strong,
The hydraulic cementing materials of the excellent properties such as fast hard, low alkalinity.The present invention is utilized based on the physics between discarded object, chemical bond
It is complementary, there is provided the system and method for sulphate aluminium cement coproduction sulphur to be prepared using municipal waste and Industrial Solid Waste, can be located
The municipal sludge and Industrial Solid Waste of reason, can produce high-performance cement again, moreover it is possible to prepare sulphur, realize the city of high-moisture percentage is dirty
Mud, Industrial Solid Waste are perfectly combined with production high-performance sulphate aluminium cement co-production sulphur and are run on a production line.
To achieve the above object, the technical scheme is that：
The method that cement joint production sulphur is prepared using municipal waste and Industrial Solid Waste, the wet dirt that municipal sewage plant produces
Mud is fed directly to balancing reservoir and is stirred with red mud and industry water without dehydration, wet mud is processed and is taken off with red mud homogenizing
Alkali, the mass fraction of wet mud is that the mass fraction of 45~55%, red mud is 20~35%, balance of industry water in balancing reservoir,
It is 1 to keep the solid-to-liquid ratio in balancing reservoir:3~1:4, homogenizing treatment temperature is 60~70 DEG C, the slurry warp after homogenized pond treatment
Press filtration, drying are crossed, fecula proportioning grinding, dried material, desulfurated plaster and work are then carried out with desulfurated plaster and activated carbon
Property charcoal input mass ratio be 25~32:67~74:1, the material after grinding is then carried out into high-temperature calcination and obtains aluminium sulfate
Clinker, the flue gas containing sulfur dioxide that will be produced after high-temperature calcination obtains sulphur by dedusting, catalysis reduction.
The water content of heretofore described wet mud is 99%.Due to containing substantial amounts of aluminium, iron, magnesium in the wet mud of city
Deng nonmetalloids such as metallic element and silicon, can with the element such as the calcium in red mud and desulfurated plaster, sulphur, aluminium carry out it is chemical mutually
Mend, be allowed to complementation and go out the necessary raw material of sulphate aluminium cement, so as to make in chemical constitution using city wet mud, red mud and take off
Sulphur gypsum prepares sulphate aluminium cement and is possibly realized.Meanwhile, the water content in the wet mud of city is in 99%, i.e. city wet mud
Containing a large amount of water, carry out solid-liquid with red mud and desulfurated plaster solid waste using the water of city wet mud and mix, realize raw material
The complementation of physical aspect, not only eliminates the dewatering process of city wet mud treatment, reduces city wet mud dehydration expense and energy
Consumption, and reduce solid material homogenizing treatment enter hydraulic art inflow, saved substantial amounts of water resource；Realize the wet dirt in city
The dewatering process of mud treatment is complementary with the technique for entering hydraulic art of solid material homogenizing treatment, has saved technological process, reduces
The cost of waste treatment, while high performance sulphate aluminium cement can also be obtained.Meanwhile, wet mud is difficult to be dehydrated, the present invention
After wet mud mixes with red mud, the dehydration property of wet mud is substantially increased.
In the link of cement burning, due to without using lime stone as the raw material for providing calcium base, with traditional desulfurization stone
During cream production clinker co-producing sulfuric acid, CaO content is usually 64~67% in ordinary portland cement clinker, and aluminium sulfate
CaO content is only 38~48% in clinker, and the difference of calcium content means the CO discharged by calcination of calcium carbonate2Reduce；
Along with firing temperature is lower than portland cement 150~200 DEG C, energy consumption low energy further reduces CO2Discharge；Application life cycles
Evaluation theory, obtains the CO that production of units clinker is discharged2Discharge capacity is only the 40% of conventional Portland clinker.
Solid-to-liquid ratio in the present invention in balancing reservoir is 1:3~1:4 can be such that the grinding carries out fully, control material fineness；
Change treatment temperature for 60~70 DEG C can make slurries remove soluble impurity and former red mud dealkalization.
The purpose of heretofore described homogenizing treatment is to remove the soluble impurity in material, and removes the oxygen in red mud
Change sodium and potassium oxide.
Heretofore described industry water is by processing applicable waste water up to standard or reclaimed water etc..
Heretofore described desulfurated plaster is the by-product gypsum after power plant desulfurization.
Heretofore described red mud is the waste red mud of alumina producer discharge.
Heretofore described fecula proportioning grinding is to add dry material, mixing, grinding, homogenizing in proportion.
Preferably, the pressing filtering liquid after press filtration carries out lime sterilization.
It is further preferred that the solid residue after lime sterilization is delivered to balancing reservoir.
It is further preferred that lime sterilization after clear liquid by after heating as dry thermal source.
Preferably, the drying is by the natural moisture removal of material.
Preferably, the desulfurated plaster for carrying out matching grinding need to carry out drying and processing.
It is further preferred that the temperature of the drying is 140 DEG C~150 DEG C.
It is further preferred that the desulfurated plaster after drying and processing is semi-hydrated gypsum.Semi-hydrated gypsum of the present invention is it
Bulk composition contains 0.5 calcium sulfate of the crystallization water, and its structural formula is CaSO4·0.5H2O。
The present invention is preheated during using waste heat to desulfurated plaster, when desulfurated plaster waste-heat to 200 DEG C
During left and right, that is, form semi-hydrated gypsum.Heat required for part calcining can be saved, energy saving.
Preferably, the composition after fecula proportioning grinding, SiO210~25% (wt%), CaO 20~40% (wt%),
Al2O310~20% (wt%), Fe2O315~25% (wt%), SO320~30% (wt%).
It is further preferred that basicity factor CmIt is 0.95~0.98.
Wherein, the formula of basicity factor is：
CaO, SiO in formula2、Al2O3、Fe2O3、TiO2、SO3Percentage by weight respectively shared by corresponding chemical composition is (public
Described CaO, SiO beyond formula2、Al2O3、Fe2O3、TiO2、SO3Respectively corresponding chemical composition).
Preferably, the granularity of the material after fecula proportioning grinding is less than 8 μm.
Preferably, the temperature of the high-temperature calcination is 1250~1300 DEG C.Common sulphate aluminium cement is in calcining heat
At 1250~1300 DEG C, 4CaO2Si2O2·CaSO2Disappear, be decomposed into α ' -2CaOSiO2With Free Ca SO4, it is now ripe
The essential mineral of material is 3CaO3Al2O3·CaSO4And 2CaOSiO2, also a small amount of iron phase and CaSO4, and it is micro
MgO, common sulphate aluminium cement is formed completely, and when being further continued for being heated to 1300~1400 DEG C, mineral clinker is without significant change；
If being heated to more than 1400 DEG C 3CaO3Al2O3·CaSO4And CaSO4Start to decompose, produce 12CaO7Al2O3Deng anxious solidifying ore deposit
, there is frit in thing.Due to the addition of activated carbon in the present invention, and calcining heat as 1250~1300 DEG C is limited, aluminum oxide is by portion
Calcium sulfate is divided to be fixed so that a part of calcium sulfate forms the 3CaO3Al for needing2O3·CaSO4Thing phase, another part
CaSO4Produce redox to be decomposed into thing phase dicalcium silicate and calcium oxide is provided, while substantial amounts of sulfur dioxide can also be produced, to make
It is the raw material of sulfur product.
The amount that desulfurated plaster is added in conventional method is less, just with the calcium sulfate in desulfurated plaster, it is necessary to additional stone
Lime stone to meet the formula of sulphate aluminium cement, but under this approach, less (the generally dispensing of the usage amount of desulfurated plaster
The 5-15% of gross mass), it is impossible to the desulfurated plaster for making full use of volume of cargo in storage abundant.Partial desulfurization gypsum is replaced lime by the present invention
Masonry is the calcium source for providing calcium oxide, and the main chemical compositions of desulfurated plaster are calcium sulfate, and it is while there is provided calcium oxide
Sulfur trioxide is also provided, sulfur trioxide content is higher, the cement solidification time is faster.But the content of sulfur trioxide is also contributed to
The intensity of cement, so that the amount of control sulfur trioxide, both can guarantee that the intensity of cement, moreover it is possible to during relative quickening cement solidification
Between, so need to remove the part sulfur trioxide in desulfurated plaster, in production process of the present invention, a part of desulfurated plaster with
The form of calcium sulfate is oxidized aluminium and is fixed on 3CaO3Al2O3·CaSO4In thing phase, the life of another part desulfurated plaster reduction decomposition
Into calcium oxide, by rational proportion, the recipe requirements of sulphate aluminium cement can be met.The consumption of desulfurated plaster is more, realizes
The purpose of sulphate aluminium cement is prepared using a large amount of desulfurated plasters, larger contribution played to the desulfurated plaster that digestion is stored up.
The coal dust of q.s is added in high-temperature burning process, coal dust firing is both provided heat, can consumed again
Unnecessary oxygen in rotary kiln, makes to be weak oxide atmosphere in rotary kiln, meanwhile, the presence of activated carbon has ensured desulfurated plaster
Resolution ratio and desulfurization degree.
Preferably, the flue gas that will be produced after calcining carries out waste heat recovery.Not only contain by the flue gas produced after calcining
Sulfur dioxide, and temperature is higher, and the heat for containing is more, the treatment temperature by after waste heat recovery, not only reducing flue gas,
Heat in flue gas can also be recycled.Waste heat recovery of the present invention refers to by high-temperature flue gas by heat transmission equipment
In heat exchange to recirculated water, recirculated water is changed into high-temperature steam, realize using the heat energy in high-temperature flue gas.
It is further preferred that the thermal source processed as homogenizing by the high-temperature steam after waste heat recovery.The energy can be improved
Effective utilization, reduce production cost.
It is further preferred that by the high-temperature steam after waste heat recovery as dry thermal source.Having for the energy can be improved
Effect is utilized, and reduces production cost.
It is further preferred that by the high-temperature steam after waste heat recovery as the thermal source dried.Having for the energy can be improved
Effect is utilized, and reduces production cost.
It is further preferred that by the high-temperature steam after waste heat recovery successively as drying, dry and homogenizing treatment heat
Source.The cascade utilization of high-temperature steam is realized, effective utilization of the energy is further improved, so as to further reduce production cost.
This method process is simple, equipment are reliable, safe and scientific, can thoroughly, simultaneously realize that the city of high-moisture percentage is dirty
Minimizing, stabilisation, the innoxious and resource of mud and large solid waste, and great lot of water resources and the energy can be saved, so as to can produce
The huge environmental benefit of life, economic benefit and social benefit.
The system that cement joint production sulphur is prepared using municipal waste and Industrial Solid Waste, including balancing reservoir, filter press, drying
Device, raw meal powder grinding machine, rotary kiln, hot water storage tank, deduster and catalysis reduction fixed bed, red mud, wet mud and industry water enter
Enter the homogenizing treatment of balancing reservoir and dealkalize, entering back into filter press carries out press filtration, and the solid material after press filtration enters into drier
Row drying, fecula proportioning grinding is carried out after drying with desulfurated plaster into raw grinding unit, and the material after grinding enters revolution
Kiln carries out high-temperature calcination and obtains sulfoaluminate clinker, and hot water is that balancing reservoir provides heat in hot water storage tank, the interior generation of rotary kiln
By deduster dedusting, reduction obtains sulphur to flue gas containing sulfur dioxide in being delivered to reduction fixed bed.
Preferably, including baker, after the baker dries desulfurated plaster together with the dried material of drier
It is delivered to raw meal powder grinding machine.
Heretofore described drier and baker is indirect type heat exchanger.Such as shell-and-tube heat exchanger etc..
Preferably, including lime sterilization pool, the hot water after being heated to balancing reservoir flow to lime sterilization pool.
It is further preferred that the pressing filtering liquid of filter press outflow flow to lime sterilization pool.
It is further preferred that the solid residue in lime sterilization pool is delivered to balancing reservoir.
Preferably, including heat exchanger and water pump, after delivery to the heat exchanger heating after water pump will be heated to balancing reservoir
Return to hot water storage tank.
It is further preferred that water pump returns to hot water storage tank after the clear liquid in lime sterilization pool is delivered into heat exchanger heating.
The impurity blocking pipeline in recirculated water is prevented, prevents from reducing heat transfer effect.
It is further preferred that delivery to the heat exchanger after water pump will be heated to balancing reservoir is heated, then through drier
Hot water storage tank is returned to after heat exchange.
It is further preferred that water pump will be heated for the delivery after balancing reservoir heating to heat exchanger, then successively through drying
Hot water storage tank is returned to after dry device, drier heat exchange.Realize the cascade utilization of circulating water heating energy.
It is further preferred that the clear liquid in lime sterilization pool is delivered to heat exchanger heating by water pump, then changed through drier
Hot water storage tank is returned to after heat.
It is further preferred that the clear liquid in lime sterilization pool is delivered to heat exchanger heating by water pump, then drying successively
Hot water storage tank is returned to after device, drier heat exchange.Both the impurity blocking pipeline in recirculated water had been prevented, has prevented from reducing heat transfer effect；Again
Realize the cascade utilization of circulating water heating energy.
It is further preferred that after the flue gas containing sulfur dioxide of the generation of rotary kiln carries out waste heat recovery into heat exchanger
Enter back into deduster dedusting.
Beneficial effects of the present invention are：
1st, the present invention can produce sulphate aluminium cement and sulphur, can increase substantially large Industrial Solid Waste dirty with city
The reconstituted product added value of mud, significantly reduces the control difficulty of technique；
2nd, this invention greatly reduces dehydrating municipal sludge expense and energy consumption；
3rd, the present invention makes full use of the moisture in wet mud based on the physics between discarded object, chemical bond using complementary
Mix large solid waste dispensing, save great lot of water resources；
4th, high-temperature tail gas multistage UTILIZATION OF VESIDUAL HEAT IN of the present invention, more energy efficient environmental protection；
5th, the present invention fundamentally can make large solid waste and reducing urban sludge, stabilisation, nothing simultaneously to a greater degree
Evilization and resource.
Brief description of the drawings
Fig. 1 is process chart of the invention.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
The system that cement joint production sulphur is prepared using municipal waste and Industrial Solid Waste, including balancing reservoir, filter press, drying
Device, raw meal powder grinding machine, rotary kiln, cement flour grinding machine, hot water storage tank, deduster and reduction fixed bed, red mud, wet mud and work
Industry water enters the homogenizing treatment of balancing reservoir and dealkalize, and entering back into filter press carries out press filtration, and the solid material after press filtration enters dry
Dry device is dried, and fecula proportioning grinding is carried out into raw grinding unit with desulfurated plaster after drying, and the material after grinding enters
Entering rotary kiln carries out high-temperature calcination acquisition sulfoaluminate clinker, and sulfoaluminate clinker is carried out with desulfurated plaster into cement flour grinding machine
Combined grinding obtains sulphate aluminium cement, and what hot water was produced for balancing reservoir is provided in heat, rotary kiln in hot water storage tank contains two
By deduster dedusting, reduction obtains sulphur to the flue gas of sulfur oxide in being delivered to reduction fixed bed.
Also include baker, the baker is delivered to after desulfurated plaster is dried together with the dried material of drier
Raw meal powder grinding machine.
Described drier and baker is shell-and-tube heat exchanger.
Also include lime sterilization pool, the hot water after being heated to balancing reservoir flow to lime sterilization pool.The press filtration of filter press outflow
Liquid flow to lime sterilization pool.Solid residue in lime sterilization pool is delivered to balancing reservoir.
Also include heat exchanger and water pump, the clear liquid in lime sterilization pool is delivered to heat exchanger heating by water pump, then successively
Hot water storage tank is returned to after drying device, drier heat exchange.Both the impurity blocking pipeline in recirculated water had been prevented, has prevented from reducing heat exchange effect
Really；The cascade utilization of circulating water heating energy is realized again.
The flue gas containing sulfur dioxide of the generation of rotary kiln enters back into deduster after carrying out waste heat recovery into heat exchanger
Dedusting.
Its technological process is：As shown in figure 1,
1. former red mud is sent into balancing reservoir by proportioning through gravity system, while be passed through municipal sewage plant's sterilization killing
High-moisture percentage wet mud after bacterium mixes with red mud, and mixed serum is stirred, and solid-liquid ratio is controlled 1:3.5, wherein,
High-moisture percentage wet mud accounts for 50%, and red mud accounts for 30%, and has standby industrial water source (by treatment applicable waste water up to standard or reclaimed water
Deng) ensure that solid-liquid ratio reaches requirement；High-temperature-hot-water is passed through balancing reservoir outside, slurry temperature maintains 65 in control balancing reservoir
DEG C, dealkalize is stirred to slurries.
2. the slurries after dealkalize pass through filter press press filtration into wet stock, while removing soluble impurity in raw material.Pressing filtering liquid
Lime sterilization pool is sent into together with balancing reservoir backwater, foldback time balancing reservoir is used the solid residue after treatment as dispensing again；Place
Clear liquid after reason is pumped into waste heat utilization equipment and generates high-temperature steam by backwater.
3. press filtration raw material are disappeared by drier drying to natural moisture, storage compartment is sent into；Desulfurated plaster is led to
Crossing baker and being heated to 145 DEG C makes desulfurated plaster be transformed into semi-hydrated gypsum, sends into storage compartment.
4. the press filtration drying material in storage compartment, desulfurated plaster drying material and activated carbon are measured into corresponding composition respectively, entered
Row is equipped with ratio, mixing, grinding, homogenizing, the mass ratio 30 of press filtration drying material, desulfurated plaster drying material and activated carbon:70:1.Pass through
Adjust raw material composition be：SiO210~25% (wt%) are accounted for, CaO accounts for 20~40% (wt%) (to be needed CaO's by calculating
Amount lifting 10% could meet minimum requirements, so only being adjusted the upper limit of CaO, please examine), Al2O3Account for 10~20%
(wt%), Fe2O3Account for 15~25% (wt%), SO3Account for 20~30% (wt%), basicity factor CmIt is 0.97,
CaO, SiO in formula2、Al2O3、Fe2O3、TiO2、SO3Percentage by weight respectively shared by corresponding chemical composition；
5. the grinding for drying grinding device, carrying out material of material is sent into by transmission equipment with the material got ready, makes powder
Abrasive particle degree is less than 8 μm, in feeding rotary kiln, high-temperature calcination 50min is carried out at 1250 DEG C.
6. coal dust is sprayed into rotary kiln burner carries out oxygen-enriched combusting.
7. the flue gas heat containing sulfur dioxide that rotary kiln is produced is reclaimed using flue gas waste heat recovery equipment, to produce height
Warm steam, carries out indirect drying to standard requirement to desulfurated plaster and press filtration material respectively.
8. reduction fixed bed reduction is delivered to by cleaner by the kiln exit gas of waste heat recovery utilizing equipment to prepare
Sulphur.
9. the sulfoaluminate clinker for being produced in rotary kiln, with calcium sulphoaluminate (3CaO3Al2O3·CaSO4) and dicalcium silicate
(2CaO·SiO2) and iron phase be main mineral.Finally, clinker is mixed the (quality of clinker and gypsum with desulfurated plaster
Than being 100:5), in feeding cement grinding mill grinding into cement.
10. the cement of pair production carries out strength character test, as a result such as following table.
Table strength character test result
Shown by upper table, the strength of cement produced reaches GB GB/T 17671-1999《Strength of cement mortar is checked
Method》In condition.
Although above-mentioned be described with reference to accompanying drawing to specific embodiment of the invention, not to invention protection domain
Limitation, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not required to
The various modifications or deformation made by paying creative work are still within the scope of the present invention.
Claims (10)
1. the method that cement joint production sulphur is prepared using municipal waste and Industrial Solid Waste, it is characterized in that, is produced from municipal sewage plant
Raw wet mud is fed directly to balancing reservoir and is stirred with red mud and industry water without dehydration, makes at wet mud and red mud homogenizing
Manage and dealkalize, the mass fraction of wet mud is that the mass fraction of 45~55%, red mud is 20~35%, balance of work in balancing reservoir
Industry water, it is 1 to keep the solid-to-liquid ratio in balancing reservoir:3~1:4, homogenizing treatment temperature is 60~70 DEG C, the slurry after homogenized pond treatment
Then material carries out fecula proportioning grinding, dried material, desulfurated plaster by press filtration, drying with desulfurated plaster and activated carbon
And the input mass ratio of activated carbon is 25~32:67~74:1, the material after grinding is then carried out into high-temperature calcination and obtains sulphur aluminium
Hydrochlorate clinker, the flue gas containing sulfur dioxide that will be produced after high-temperature calcination obtains sulphur by dedusting, catalysis reduction.
2. the method for claim 1, it is characterized in that, it is sterilized that the pressing filtering liquid after press filtration carries out lime；
Preferably, the solid residue after lime sterilization is delivered to balancing reservoir；
Preferably, lime sterilization after clear liquid by after heating as dry thermal source.
3. the method for claim 1, it is characterized in that, the drying is by the natural moisture removal of material；
Or, the desulfurated plaster for carrying out fecula proportioning grinding need to carry out drying and processing；
Preferably, the desulfurated plaster after drying and processing is semi-hydrated gypsum.
4. the method for claim 1, it is characterized in that, the composition after fecula proportioning grinding, SiO210~25% (wt%),
CaO 20~40% (wt%), Al2O310~20% (wt%), Fe2O315~25% (wt%), SO320~30%
(wt%)；Preferably, basicity factor CmIt is 0.95~0.98；
Or, the temperature of the high-temperature calcination is 1250~1300 DEG C.
5. method as claimed in claim 1, it is characterized in that, the flue gas produced after the calcining carries out waste heat recovery；
Preferably, by the flue gas after waste heat recovery by being discharged after dedusting；
Preferably, the thermal source for being processed as homogenizing by the high-temperature steam after waste heat recovery；
Preferably, by the high-temperature steam after waste heat recovery as dry thermal source；
Preferably, by the high-temperature steam after waste heat recovery as the thermal source dried；
Preferably, by the high-temperature steam after waste heat recovery successively as drying, dry and homogenizing treatment thermal source.
6. the system that cement joint production sulphur is prepared using municipal waste and Industrial Solid Waste, it is characterized in that, including balancing reservoir, press filtration
Machine, drier, raw meal powder grinding machine, rotary kiln, hot water storage tank, deduster and catalysis reduction fixed bed, red mud, wet mud and work
Industry water enters the homogenizing treatment of balancing reservoir and dealkalize, and entering back into filter press carries out press filtration, and the solid material after press filtration enters dry
Dry device is dried, and fecula proportioning grinding is carried out into raw grinding unit with desulfurated plaster after drying, and the material after grinding enters
Enter rotary kiln and carry out high-temperature calcination to obtain sulfoaluminate clinker, hot water provides heat for balancing reservoir in hot water storage tank, in rotary kiln
By deduster dedusting, reduction obtains sulphur to the flue gas containing sulfur dioxide for producing in being delivered to reduction fixed bed.
7. system as claimed in claim 6, it is characterized in that, including baker, the baker desulfurated plaster is dried after with
The dried material of drier is delivered to raw meal powder grinding machine together.
8. system as claimed in claim 6, it is characterized in that, including lime sterilization pool, the hot water after being heated to balancing reservoir flow to
Lime sterilization pool；
Preferably, the pressing filtering liquid of filter press outflow flow to lime sterilization pool；
Preferably, the solid residue in lime sterilization pool is delivered to balancing reservoir.
9. the system as described in claim 6-8 is any, it is characterized in that, including heat exchanger and water pump, water pump will add to balancing reservoir
Hot water storage tank is returned to after delivery to heat exchanger heating after heat.
10. system as claimed in claim 9, it is characterized in that, the clear liquid in lime sterilization pool is delivered to heat exchanger and added by water pump
Hot water storage tank is returned to after heat；
Or, delivery to the heat exchanger after water pump will be heated to balancing reservoir is heated, hot water is returned to after then being exchanged heat through drier
Storage tank；
Or, water pump will be heated for the delivery after balancing reservoir heating to heat exchanger, then drying device, drier heat exchange successively
After return to hot water storage tank；
Or, the clear liquid in lime sterilization pool is delivered to heat exchanger heating by water pump, hot water is returned to after then being exchanged heat through drier and is stored up
Tank；
Or, the clear liquid in lime sterilization pool is delivered to heat exchanger heating by water pump, then successively after drying device, drier heat exchange
Return to hot water storage tank；
Or, the flue gas containing sulfur dioxide of the generation of rotary kiln enters back into deduster after carrying out waste heat recovery into heat exchanger removing
Dirt.
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