CN106810094B - 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 PDF

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CN106810094B
CN106810094B CN201710160135.8A CN201710160135A CN106810094B CN 106810094 B CN106810094 B CN 106810094B CN 201710160135 A CN201710160135 A CN 201710160135A CN 106810094 B CN106810094 B CN 106810094B
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heat
grinding
balancing reservoir
hot water
waste
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CN106810094A (en
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王文龙
任常在
毛岩鹏
孙静
宋占龙
赵希强
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Shandong University
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Shandong University
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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
    • 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
    • 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
    • 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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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Treating Waste Gases (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The invention discloses the system and methods 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 grinding machine, hot water storage tank, deduster and reduction fixed bed, red mud, wet mud and industry water enter balancing reservoir and are homogenized processing and dealkalize, it enters back into filter press and carries out filters pressing, solid material after filters pressing enters drier and is dried, enter raw grinding unit with desulfurized gypsum after drying and carries out fecula proportion grinding, material after grinding enters rotary kiln and carries out high-temperature calcination acquisition sulfoaluminate clinker, sulfoaluminate clinker and desulfurized gypsum enter cement grinding machine and carry out combined grinding acquisition sulphate aluminium cement, hot water provides heat for balancing reservoir in hot water storage tank, the flue gas containing sulfur dioxide generated in rotary kiln passes through dedusting Device dedusting is delivered to reduction in reduction fixed bed and obtains sulphur.

Description

The system and method for cement joint production sulphur is prepared using municipal waste and Industrial Solid Waste
Technical field
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 guarantors Protect 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 technique
Since reform and opening-up, with the rapid development of China's industry and the quickening of urbanization process, and then generate a large amount of each The poisonous and hazardous industrial solid castoff of kind, and its quantity is also constantly rising.Large industrial solid castoff, it is referred to as large Solid waste refers to that China generates 10,000,000 tons or more to environment and the biggish industrial solid of security implication in the field of industrial production middle age Waste mainly includes red mud, desulfurized gypsum, 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 increase 19,000,000,000 tons of storage newly.15,000,000,000 tons of total growth of " large solid waste " during " 12th Five-Year Plan ", total increase newly are deposited Measure 27,000,000,000 tons.
Likewise, increase and popularization with China's urban population, municipal sewage treatment difficulty increasingly increase, according to Official statistics, in by the end of September, 2015 by, national cities and towns have built up 3830 sewage treatment plants, up to 1.62 hundred million m3The sewage of/d Processing capacity, association sludge break through 30,000,000 tons/year.And sludge is that a kind of moisture content for generating in sewage disposal process is very high Waste, ingredient mainly contain the floccule of various microorganisms and organic and inorganic particle composition, have containing largely toxic Evil substance, 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 member Element composition, and be similar clay, the minerals with fines.Sludge pollution object often has long term toxicity and can not Degradability will enter food chain by media such as big gas and water and soil if untreated and unordered discharge, become dangerous two Secondary source of pollution causes damages to human health and ecology.China generates 30,000,000 ton of -4,000 ten thousand tons of moisture content on 80% left side every year Right municipal sludge, domestic sludge yield in 2015 are 35,000,000 tons.According to " Chinese specific resistance to filtration Market Report (2016 editions) " it is found that national wet mud harmless treatment rate average value in 2015 between 32%, with actual demand there is also compared with Big gap.Therefore, in sewage treatment field, sludge treatment also becomes current a great problem.
Currently used Sludge Disposal Techniques mainly have anaerobic digestion, aerobic fermentation, deep dehydration, heat drying, lime steady Fixed, burning and carbonization etc..But these technologies can not thoroughly, simultaneously realize the minimizing of sludge, stabilisation, it is innoxious with Recycling always generates many contingency questions, for example energy consumption is big, technical operating procedure generates effluvium pollution environment, burns tail Gas generates the problems such as toxic gases such as dioxin etc..
Currently in order to carry out resource utilization to sludge, needs first to carry out deep dehydration to sludge, its moisture content is reduced To 50% or so, however device for dehydrating sladge waste investment is high, and later period operation and maintenance cost is also higher and causes great lot of water resources unrestrained Take.
China is mainly recycled from petroleum refining, natural gas purification almost without crude sulfur mine, sulphur, and from coalification The environmentally friendly by-product of the industries such as work, chemical fertilizer production, thermal power generation, non-ferrous metal metallurgy obtains.Sulphur recovery and vent gas treatment skill Art develops into the important process technology for having both environmental benefit and economic benefit via simple environmental protection technology.Domestic sulphur year Yield is only more than 1,000 ten thousand tons, and annual consumption is more than 10,000,000 tons, every year need to be about 9,000,000 tons from external import, is showed tight Situation that supply falls short of demand again.The byproduct that at home and abroad sulphur has not been re-used as petroleum at present, natural gas recycles, but as one Kind valuable source is circulating.China generally uses natural gypsum mine to produce sulphur, but uses natural gypsum mine production sulphur Higher cost relies primarily on imported sulphur in Chemical Manufacture, Sulfur price is caused to rise steadily, improve Chemical Manufacture at This.
In recent years, sulphate aluminium cement becomes the new direction of domestic and international cement industry research and development, and clinker has A series of superiority such as heat consumption is low, early strength is high, setting time is short, fabulous freeze-thaw resistance required for production, basicity is low Can, it is now 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 in salt cement is lime stone, bauxite and gypsum, and lime stone is mainly to provide sulphur aluminium as calcareous raw material Required calcium oxide component in acid salt cement Formation Process of Clinker, bauxite mainly provide aluminium sulfate water as aluminum raw material Required alumina composition in mud Formation Process of Clinker；Gypsum mainly provides sulphoaluminate cement clinker shape as sulphur matter raw material At required sulfur trioxide ingredient in the process.In actual production, lime stone is decomposed at 850-900 DEG C, generates CaO And CO2, CO2From discarded middle evolution, since sulphoaluminate cement clinker needs to use during the preparation process a large amount of lime stone, institute A large amount of CO can be discharged2, the greenhouse effects of environment are exacerbated significantly.
Summary of the invention
The large solid waste in China and municipal sludge volume of cargo in storage are huge, using difficulty height, in order to make at present using few, volume of cargo in storage City wet mud, red mud and desulfurized gypsum extremely abundant are fully used, to produce required for architectural engineering it is early it is strong, The hydraulic cementing materials of the excellent properties such as fast hard, low alkalinity.The present invention is based on the physics between waste, chemical bondings to utilize Complementation provides the system and method that sulphate aluminium cement coproduction sulphur is prepared using municipal waste and Industrial Solid Waste, can locate The municipal sludge and Industrial Solid Waste of reason, and high-performance cement can be produced, moreover it is possible to sulphur is prepared, is realized 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 run on a production line.
To achieve the above object, the technical solution of the present invention is as follows:
The method for preparing cement joint production sulphur using municipal waste and Industrial Solid Waste, the wet dirt that municipal sewage plant generates Mud is fed directly to balancing reservoir without dehydration and is stirred with red mud and industry water, is homogenized wet mud with red mud and handles and take off Alkali, the mass fraction of wet mud is 45~55% in balancing reservoir, the mass fraction of red mud is 20~35%, surplus is industry water, Keeping the solid-to-liquid ratio in balancing reservoir is 1:3~1:4, and homogenizing treatment temperature is 60~70 DEG C, treated in homogenized pond slurry warp Filters pressing, drying are crossed, then fecula is carried out with desulfurized gypsum and active carbon and matches grinding, material, desulfurized gypsum and work after drying Property charcoal investment mass ratio be 25~32:67~74:1, then by after grinding material carry out high-temperature calcination obtain aluminium sulfate The flue gas containing sulfur dioxide generated after high-temperature calcination is restored by dedusting, catalysis, obtains sulphur by clinker.
The water content of heretofore described wet mud is 99%.Due to containing a large amount of aluminium, iron, magnesium in the wet mud of city The equal nonmetalloids such as metallic elements and silicon can carry out chemistry mutually with elements such as calcium, sulphur, aluminium in red mud and desulfurized gypsum It mends, is allowed to the complementary necessary raw material of sulphate aluminium cement out, to make in chemical structure 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 99%, i.e., in the wet mud of city Containing a large amount of water, solid-liquid is carried out with red mud and desulfurized gypsum solid waste using the water of city wet mud and is mixed, realizes raw material The complementation of physical aspect not only eliminates the dewatering process of city wet mud processing, reduces city wet mud dehydration expense and energy Consumption, and the water inlet technique inflow of solid material homogenizing processing is reduced, save a large amount of water resource；Realize the wet dirt in city The dewatering process of mud processing is complementary with the technique of water inlet technique of solid material homogenizing processing, has saved process flow, has reduced The cost of waste processing, while high performance sulphate aluminium cement can also be obtained.Meanwhile wet mud is difficult to be dehydrated, the present invention After mixing by wet mud with red mud, the dehydration property of wet mud is substantially increased.
In the link of cement burning, due to not using lime stone as providing the raw material of calcium base, with traditional desulfurization stone When cream produces 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 carbonate2It reduces； 150~200 DEG C lower than portland cement along with firing temperature, energy consumption low energy further decreases CO2Discharge；Application life cycles Evaluation theory obtains the CO that production of units clinker is discharged2Discharge amount is only the 40% of conventional Portland clinker.
Solid-to-liquid ratio in the present invention in balancing reservoir is that 1:3~1:4 can make grinding carry out sufficiently, controlling fineness of materials；? Changing treatment temperature can make slurries remove soluble impurity and former red mud dealkalization for 60~70 DEG C.
The purpose of heretofore described homogenizing processing is the soluble impurity removed 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 middle water etc..
Heretofore described desulfurized gypsum 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 proportion grinding is to add dry material, mixing, grinding, homogenizing in proportion.
Preferably, the pressing filtering liquid after filters pressing 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 the clear liquid after lime sterilization is after heating as dry heat source.
Preferably, the drying is by the natural moisture removal of material.
Preferably, the desulfurized gypsum for carrying out proportion 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 desulfurized gypsum after drying and processing is semi-hydrated gypsum.Semi-hydrated gypsum of the present invention is it Bulk composition contains the calcium sulfate of 0.5 crystallization water, structural formula CaSO4·0.5H2O。
The present invention preheats desulfurized gypsum during using waste heat, when desulfurized gypsum waste-heat is to 200 DEG C When left and right, that is, form semi-hydrated gypsum.Heat required for a part is calcined can be saved, it is energy saving.
Preferably, the ingredient after fecula proportion 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 are as follows:
CaO, SiO in formula2、Al2O3、Fe2O3、TiO2、SO3Respectively weight percent shared by corresponding chemical ingredient is (public Described CaO, SiO other than formula2、Al2O3、Fe2O3、TiO2、SO3Respectively corresponding chemical ingredient).
Preferably, the granularity of the material after fecula proportion 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 calcination temperature At 1250~1300 DEG C, 4CaO2Si2O2·CaSO2It disappears, is decomposed into α ' -2CaOSiO2With Free Ca SO4, ripe at this time The essential mineral of material is 3CaO3Al2O3·CaSO4And 2CaOSiO2, there are also a small amount of iron phase and CaSO4And it is micro MgO, common sulphate aluminium cement are 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 1400 DEG C or more 3CaO3Al2O3·CaSO4And CaSO4Start to decompose, generates 12CaO7Al2O3Deng anxious solidifying mine There is frit in object.Due to being added to active carbon in the present invention, and limit calcination temperature as 1250~1300 DEG C, aluminium oxide is by portion Calcium sulfate is divided to be fixed, so that a part of calcium sulfate forms the 3CaO3Al needed2O3·CaSO4Object phase, another part CaSO4It generates redox and object phase dicalcium silicate offer calcium oxide is provided, while a large amount of sulfur dioxide can also be generated, to make For the raw material of sulfur product.
The amount that desulfurized gypsum is added in conventional method is less, just with the calcium sulfate in desulfurized gypsum, needs additional stone Lime stone is to meet the formula of sulphate aluminium cement, but under this approach, less (the generally ingredient of the usage amount of desulfurized gypsum The 5-15% of gross mass), it is unable to fully utilize volume of cargo in storage desulfurized gypsum abundant.Partial desulfurization gypsum is replaced lime by the present invention Masonry is to provide the calcium source of calcium oxide, and the main chemical compositions of desulfurized gypsum are calcium sulfate, while providing calcium oxide Sulfur trioxide is also provided, sulfur trioxide content is higher, and the cement solidification time is faster.However the content of sulfur trioxide also affects The intensity of cement, thus need to control the amount of sulfur trioxide, it both can guarantee the intensity of cement, moreover it is possible to when opposite quickening cement solidification Between, thus need by desulfurized gypsum part sulfur trioxide removing, in production process of the present invention, a part of desulfurized gypsum with The form of calcium sulfate is oxidized aluminium and is fixed on 3CaO3Al2O3·CaSO4In object phase, another part desulfurized gypsum reduction decomposition is raw The recipe requirements of sulphate aluminium cement can satisfy by rational proportion at calcium oxide.The dosage of desulfurized gypsum is more, realizes The purpose that sulphate aluminium cement is prepared using a large amount of desulfurized gypsums plays biggish contribution to the desulfurized gypsum of digestion stockpiling.
The coal dust of sufficient amount is added in high-temperature burning process, makes coal dust firing that can not only provide heat, but also can consume Extra oxygen in rotary kiln makes to be weak oxide atmosphere in rotary kiln, meanwhile, the presence of active carbon has ensured desulfurized gypsum Resolution ratio and desulfurization degree.
Preferably, the flue gas generated after calcining is subjected to waste heat recycling.Not only contain in the flue gas generated after calcining Sulfur dioxide, and temperature is higher, the heat contained is more, after waste heat recycles, the treatment temperature of flue gas is not only reduced, Heat in flue gas can also be recycled.Waste heat of the present invention recycling refers to high-temperature flue gas through heat exchange equipment In heat exchange to recirculated water, so that recirculated water is become high-temperature steam, realize and utilize the thermal energy in high-temperature flue gas.
It is further preferred that the heat source by waste heat high-temperature steam after the recovery as homogenizing processing.It can be improved the energy Effective use, reduce production cost.
It is further preferred that by waste heat high-temperature steam after the recovery as dry heat source.Can be improved the energy has Effect utilizes, and reduces production cost.
It is further preferred that the heat source by waste heat high-temperature steam after the recovery as drying.Can be improved the energy has Effect utilizes, and reduces production cost.
It is further preferred that by waste heat high-temperature steam after the recovery successively as drying, dry and homogenizing processing heat Source.The cascade utilization for realizing high-temperature steam, further increases the effective use of the energy, to further decrease production cost.
This method simple process, equipment are reliable, safe and scientific, can thoroughly, simultaneously realize that the city of high-moisture percentage is dirty The minimizing of mud and large solid waste, stabilisation, innoxious and recycling, and great lot of water resources and the energy can be saved, to can produce Raw huge environmental benefit, economic benefit and social benefit.
The system for preparing cement joint production sulphur 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 into Enter balancing reservoir be homogenized processing and dealkalize, enter back into filter press carry out filters pressing, the solid material after filters pressing enter drier into Row drying enters raw grinding unit with desulfurized gypsum after dry and carries out fecula proportion grinding, and the material after grinding enters revolution Kiln carries out high-temperature calcination and obtains sulfoaluminate clinker, and hot water provides heat for balancing reservoir in hot water storage tank, generates in rotary kiln Flue gas containing sulfur dioxide passes through deduster dedusting, is delivered to reduction in reduction fixed bed and obtains sulphur.
Preferably, including baker, after the baker dries desulfurized gypsum it is dry with drier after material together with 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 heating 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, water pump will be after the delivery after heating to balancing reservoir to heat exchanger heating Return to hot water storage tank.
It is further preferred that the clear liquid in lime sterilization pool is delivered to after heat exchanger heats by water pump returns to hot water storage tank. The impurity blocking pipeline in recirculated water is prevented, prevents from reducing heat transfer effect.
It is further preferred that water pump heats the delivery after heating to balancing reservoir to heat exchanger, then through drier Hot water storage tank is returned to after heat exchange.
It is further preferred that water pump heats the delivery after heating for balancing reservoir 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 heats it is further preferred that the clear liquid in lime sterilization pool is delivered to heat exchanger by water pump, is then changed through drier Hot water storage tank is returned to after heat.
It is heated it is further preferred that the clear liquid in lime sterilization pool is delivered to heat exchanger by water pump, then successively drying 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 enters heat exchanger progress waste heat recycling Enter back into deduster dedusting.
The invention has the benefit that
1, the present invention is able to produce sulphate aluminium cement and sulphur, can increase substantially large Industrial Solid Waste and city is dirty The reconstituted product added value of mud significantly reduces the control difficulty of technique；
2, this invention greatly reduces dehydrating municipal sludge expense and energy consumptions；
3, the present invention is based on the physics between waste, chemical bondings to utilize complementation, makes full use of the moisture in wet mud Large solid waste ingredient is mixed, great lot of water resources is saved；
4, high-temperature tail gas multistage UTILIZATION OF VESIDUAL HEAT IN of the present invention, more energy efficient environmental protection；
5, the present invention can fundamentally make large solid waste and reducing urban sludge, stabilisation, nothing simultaneously to a greater degree Evilization and recycling.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
The system for preparing cement joint production sulphur using municipal waste and Industrial Solid Waste, including balancing reservoir, filter press, drying Device, raw meal powder grinding machine, rotary kiln, cement grinding machine, hot water storage tank, deduster and reduction fixed bed, red mud, wet mud and work Industry water enters balancing reservoir and is homogenized processing and dealkalize, enters back into filter press and carries out filters pressing, the solid material after filters pressing enters dry Dry device is dried, and enters raw grinding unit with desulfurized gypsum after dry and carries out fecula proportion grinding, the material after grinding into Enter rotary kiln and carry out high-temperature calcination acquisition sulfoaluminate clinker, sulfoaluminate clinker and desulfurized gypsum enter the progress of cement grinding machine Combined grinding obtains sulphate aluminium cement, and hot water provides heat for balancing reservoir in hot water storage tank, and what is generated in rotary kiln contains two The flue gas of sulfur oxide passes through deduster dedusting, is delivered to reduction in reduction fixed bed and obtains sulphur.
Further include baker, is delivered to together with the material after the baker is dry with drier after drying desulfurized gypsum Raw meal powder grinding machine.
The drier and baker is shell-and-tube heat exchanger.
Further include lime sterilization pool, flow to lime sterilization pool to the hot water after balancing reservoir heating.The filters pressing of filter press outflow Liquid stream is to lime sterilization pool.Solid residue in lime sterilization pool is delivered to balancing reservoir.
It further include heat exchanger and water pump, the clear liquid in lime sterilization pool is delivered to heat exchanger and heated 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 Fruit；The cascade utilization of circulating water heating energy is realized again.
The flue gas containing sulfur dioxide of the generation of rotary kiln, which enters after heat exchanger carries out waste heat recycling, enters back into deduster Dedusting.
Its process flow are as follows: as shown in Figure 1,
1. former red mud is sent into balancing reservoir through gravity system according to the ratio, while being passed through municipal sewage plant's disinfection and killing High-moisture percentage wet mud after bacterium is mixed with red mud, is stirred to mixed serum, makes the control of solid-liquid ratio in 1:3.5, wherein High-moisture percentage wet mud accounts for 50%, and red mud accounts for 30%, and has spare industrial water source (by handling applicable waste water up to standard or middle water Deng) guarantee that solid-liquid ratio reaches requirement；High-temperature-hot-water is passed through on the outside of balancing reservoir, slurry temperature in balancing reservoir is controlled and maintains 65 DEG C, dealkalize is stirred to slurries.
2. the slurries after dealkalize pass through filter press filters pressing into wet stock, while removing soluble impurity in raw material.Pressing filtering liquid Lime sterilization pool is sent into together with balancing reservoir return water, foldback returns balancing reservoir and uses as ingredient again for treated solid residue；Place Clear liquid after reason is pumped into waste heat utilization equipment by return water and generates high-temperature steam.
3. filters pressing raw material are dry until natural moisture disappears by drier, it is sent into storage compartment；Desulfurized gypsum is led to Crossing baker and being heated to 145 DEG C makes desulfurized gypsum be transformed into semi-hydrated gypsum, is sent into storage compartment.
4. the indoor filters pressing drying material of storing, desulfurized gypsum drying material and active carbon are measured into corresponding composition respectively, into Row is equipped with ratio, mixing, grinding, homogenizing, the mass ratio 30:70:1 of filters pressing drying material, desulfurized gypsum drying material and active carbon.Pass through Adjust the composition of raw material are as follows: SiO210~25% (wt%) are accounted for, CaO accounts for 20~40% (wt%), 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、SO3Respectively weight percent shared by corresponding chemical ingredient；
5. being sent into the drying grinding device of material by transmission device with the material got ready, the grinding of material is carried out, powder is made Abrasive grain degree is sent into rotary kiln less than 8 μm, and high-temperature calcination 50min is carried out at 1250 DEG C.
6. coal dust is sprayed into rotary kiln burner and carries out oxygen-enriched combusting.
7. the flue gas heat containing sulfur dioxide generated using flue gas waste heat recovery equipment recycling rotary kiln, to generate height Warm steam carries out indirect drying to standard requirements to desulfurized gypsum and filters pressing material respectively.
8. the kiln exit gas by waste heat recovery utilizing equipment is delivered to reduction fixed bed reduction preparation by cleaner Sulphur.
9. in the sulfoaluminate clinker that rotary kiln generates, 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 desulfurized gypsum Cement is worn into than for 100:5), being sent into cement grinding mill inner powder.
10. the cement of pair production carries out strength character test, as a result such as following table.
Table strength character test result
Show that the strength of cement produced reaches national standard GB/T 17671-1999 " strength of cement mortar inspection by upper table Method " in condition.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not to invention protection scope Limitation, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not required to It is still within the scope of the present invention to make the creative labor the various modifications or changes that can be made.

Claims (28)

1. the method for preparing cement joint production sulphur using municipal waste and Industrial Solid Waste, characterized in that is produced from municipal sewage plant Raw wet mud is fed directly to balancing reservoir without dehydration and is stirred with red mud and industry water, makes at wet mud and red mud homogenizing Simultaneously dealkalize is managed, the mass fraction of wet mud is 45~55% in balancing reservoir, the mass fraction of red mud is 20~35%, surplus is work Industry water, keeping the solid-to-liquid ratio in balancing reservoir is 1:3~1:4, and homogenizing treatment temperature is 60~70 DEG C, treated in homogenized pond slurry Material passes through filters pressing, drying, then carries out fecula with desulfurized gypsum and active carbon and matches grinding, the material, desulfurized gypsum after drying And the investment mass ratio of active carbon is 25~32:67~74:1, and the material after grinding is then carried out high-temperature calcination and obtains sulphur aluminium The flue gas containing sulfur dioxide generated after high-temperature calcination is restored by dedusting, catalysis, obtains sulphur by hydrochlorate clinker.
2. the method as described in claim 1, characterized in that the pressing filtering liquid after filters pressing carries out lime sterilization.
3. method according to claim 2, characterized in that the solid residue after lime sterilization is delivered to balancing reservoir.
4. method according to claim 2, characterized in that the clear liquid after lime sterilization is after heating as dry heat Source.
5. the method as described in claim 1, characterized in that the drying is by the natural moisture removal of material.
6. the method as described in claim 1, characterized in that the desulfurized gypsum for carrying out fecula proportion grinding need to carry out at drying Reason.
7. method as claimed in claim 6, characterized in that the desulfurized gypsum after drying and processing is semi-hydrated gypsum.
8. the method as described in claim 1, characterized in that fecula matches the ingredient after grinding, SiO210~25wt%, CaO 20~40wt%, Al2O310~20wt%, Fe2O315~25wt%, SO320~30wt%.
9. method according to claim 8, characterized in that basicity factor CmIt is 0.95~0.98.
10. the method as described in claim 1, characterized in that the temperature of the high-temperature calcination is 1250~1300 DEG C.
11. the method as described in claim 1, characterized in that the flue gas generated after the high-temperature calcination carries out waste heat recycling.
12. method as claimed in claim 11, characterized in that discharged after dedusting by waste heat flue gas after the recovery.
13. method as claimed in claim 11, characterized in that by waste heat high-temperature steam after the recovery as homogenizing processing Heat source.
14. method as claimed in claim 11, characterized in that by waste heat high-temperature steam after the recovery as dry heat Source.
15. method as claimed in claim 11, characterized in that the heat by waste heat high-temperature steam after the recovery as drying Source.
16. method as claimed in claim 11, characterized in that by waste heat high-temperature steam after the recovery successively as drying, Dry and homogenizing processing heat source.
17. the system for preparing cement joint production sulphur using municipal waste and Industrial Solid Waste, characterized in that including balancing reservoir, filters pressing 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 balancing reservoir and is homogenized processing and dealkalize, enters back into filter press and carries out filters pressing, the solid material after filters pressing enters dry Dry device is dried, and enters raw grinding unit with desulfurized gypsum after dry and carries out fecula proportion grinding, the material after grinding into 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 The flue gas containing sulfur dioxide generated passes through deduster dedusting, is delivered to reduction in reduction fixed bed and obtains sulphur.
18. system as claimed in claim 17, characterized in that including baker, after the baker dries desulfurized gypsum Raw meal powder grinding machine is delivered to together with material after dry with drier.
19. system as claimed in claim 17, characterized in that including lime sterilization pool, to the hot water stream after balancing reservoir heating To lime sterilization pool.
20. system as claimed in claim 19, characterized in that the pressing filtering liquid of filter press outflow flow to lime sterilization pool.
21. system as claimed in claim 19, characterized in that the solid residue in lime sterilization pool is delivered to balancing reservoir.
22. the system as described in claim 17-21 is any, characterized in that including heat exchanger and water pump, water pump will give balancing reservoir Hot water storage tank is returned to after delivery to heat exchanger heating after heating.
23. the system as claimed in claim 22, 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.
24. the system as claimed in claim 22, characterized in that water pump is by the delivery after heating to balancing reservoir to heat exchanger Heating, then returns to hot water storage tank after drier exchanges heat.
25. the system as claimed in claim 22, characterized in that water pump is by the delivery after heating for balancing reservoir to heat exchanger Then heating successively returns to hot water storage tank after drying device, drier heat exchange.
26. the system as claimed in claim 22, characterized in that the clear liquid in lime sterilization pool is delivered to heat exchanger and added by water pump Then heat returns to hot water storage tank after drier exchanges heat.
27. the system as claimed in claim 22, characterized in that the clear liquid in lime sterilization pool is delivered to heat exchanger and added by water pump Then heat successively returns to hot water storage tank after drying device, drier heat exchange.
28. the system as claimed in claim 22, characterized in that the flue gas containing sulfur dioxide of the generation of rotary kiln, which enters, to be changed Hot device enters back into deduster dedusting after carrying out waste heat recycling.
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CN110240123B (en) * 2019-06-27 2021-06-22 山东鲁北企业集团总公司 Method for preparing sulfuric acid by using rotary kiln incineration waste sulfur and sulfur-containing waste liquid
CN113008017B (en) * 2021-04-23 2023-12-26 徐州无废城市技术研究院有限公司 Coal-fired power plant solid waste and wastewater cooperative treatment system and method
CN113912021B (en) * 2021-11-16 2022-12-20 上海驰春节能科技有限公司 System and process for producing sulfur and cement clinker by using industrial byproduct gypsum in cooperation with metallurgical slag solution

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