CN103204642B - Novel dry-process cement kiln household garbage incineration method - Google Patents
Novel dry-process cement kiln household garbage incineration method Download PDFInfo
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- CN103204642B CN103204642B CN201310112738.2A CN201310112738A CN103204642B CN 103204642 B CN103204642 B CN 103204642B CN 201310112738 A CN201310112738 A CN 201310112738A CN 103204642 B CN103204642 B CN 103204642B
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Classifications
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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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
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- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a novel dry-process cement kiln household garbage incineration method. The novel dry-process cement kiln household garbage incineration method comprises the following steps of: crushing the household garbage and adding the crushed household garbage to fermentation microflora; evaporating and dehydrating part of the moisture of the crushed household garbage by utilizing an aging effect of the fermentation microflora to the household garbage and the heat generated in the aging process; magnetically separating metals; feeding the household garbage to a decomposing furnace by a metering feeder at the junction of a tertiary air pipe port and the decomposing furnace along the tangential direction of the tertiary air pipe; and quickly scattering, igniting and roasting the household garbage in the kiln by virtue of tertiary air. The novel dry-process cement kiln household garbage incineration method can be used for simplifying a separation process, achieving a high metal separation rate, fermenting, ageing and dehydrating and reducing the energy loss in the incineration process, so that the problem that the adhesion huddles cannot be quickly scattered and combusted after being fed to the cement kiln decomposing furnace due to extremely high moisture content is solved, and therefore, the quick inclination rate is ensured. The whole process is completed by one-step feeding without generating secondary pollution, so that the full reduction, the resource utilization, the innoxious disposal, the full treatment and the zero emission of the household garbage are really realized, and therefore, the novel dry-process cement kiln household garbage incineration method has better economic benefits, social benefits and ecological benefits.
Description
technical field:
The invention belongs to technical field of waste treatment, relate to one way of life waste disposal method, particularly relate to a kind of method of new dry process rotary kiln burning domestic garbage.
background technology:
More than 660, China city, the annual domestic refuse that produces is about
1.8 hundred million tons, ending National urban level of harmless treatment rate of life waste in 2010 is 86.9%.At present, landfill, compost, burning three kinds of methods are mainly contained in city house refuse treatment method.Because incineration technology exists the factor restriction that project construction cost is high and running cost is large, compost treatment exists because season, product are used and sold the factor impacts such as channel and produced unstable, and current China mainly relies on consumer waste filling and embedding process.Along with the continuous quickening of China's urbanization degree and the increase year by year of Output of Domestic Waste, seeking to improve Prediction for Solid Waste Treatment Technology has thoroughly been the direction that various places emphasis is sought.Consumer waste incineration process mainly contains following advantage: (1) minimizing degree is high, and domestic refuse volume after burning reduces 80-90%; (2) resource utilization degree is high, and domestic refuse is through burning the heat energy utilization generating or heat supply that produce; (3) innoxious degree is high, and domestic refuse is through burning, and bacterium is gone out and removes, and burns the obnoxious flavour qualified discharge after the process of vent gas treatment facility produced.Consumer waste incineration possesses good minimizing, resource utilization and innoxious because of it, become the mode of various places main development in recent years, through the development of last decade, China's consumer waste incineration processing rate (burning amount accounts for the per-cent of Output of Domestic Waste) from 2.90% of calendar year 2001 be increased to 2011 24.04%.According to " 12 " planning, by 2015, national application of city life garbage burning disposal facility ability reached more than 35% of harmless treatment total capacity in China, and its Middle Eastern reaches more than 48%.
Consideration of MSW Incineration Technology mainly contains grate furnace incineration technology and fluidized combustion technology:
1, grate incinerator.Municipal wastes is transported to the garbage pool of incineration plant, hanging in hopper, entering burner hearth through grabbing, through super-dry, burning, 3 stages of after-flame, under the combustion-supporting condition of excess air, rubbish stirs in fire grate, Thorough combustion.The slag of after-flame, after slag bath cooling, transports landfill outside factory to.This technological merit is: (1) operation management is relatively simple; (2) take up an area less.This technical disadvantages is: (1) bad adaptability, and when MSW heating value is low and water ratio is higher, burning effect is bad; (2) investment is large, and grate furnace burning domestic garbage project construction investment target is 30-40 ten thousand yuan/ton; (3) working cost is high, and it is low that this technology destroys rate by fire to domestic refuse, and in the gas that residue and consumer waste incineration produce, hazardous substance content is high, and processing cost is high, and the grate furnace burning domestic garbage project operation expense that China runs at present is 150-250 yuan/ton.
2, fluidized bed incinerator.Rubbish, through material grasping bucket, is thrown in in stove from the top of incinerator, drops on the central authorities of pulldown bed, and then slowly by the heating of 600-700 DEG C of hot sand bed, consequently rubbish is lost its moisture by hot sand roasting and becomes fragile, and is then distributed to the fluidized-bed of pulldown bed both sides.Domestic refuse crisp and frangible in fluidized-bed is extruded into fragment by the sand grains of strenuous exercise and burns very soon.On the other hand, the incombustible substance in domestic refuse then moves to incinerator both sides together with sand grains, automatically discharges out of the furnace together with sand grains.This kind of novel fluidized bed incinerator when directly burning without when process (fragmentation) in advance, can be succeeded in developing in 1981 years.This technological merit is: (1) domestic refuse does not need sorting, can directly burn; (2) suitability is good, by the thermal inertia that the hot husky bed of flowing produces, to Lower heat value and the high consumer waste incineration effect of water ratio better.This technical disadvantages is: (1) operational administrative difficulty is large; (2) consumption of power is large; (3) fume treatment costly, and the gas that this technology burning domestic garbage produces need be disposed, so cost is higher according to danger wastes after charcoal absorption and bag filter are collected.
Current open source literature reports some new dry process rotary kiln burning domestic garbage New Method for Processing and new installations:
Chinese patent CN200910114490.7, the method for domestic refuse rotary cement kiln burning method as novel dry.The method comprises the process of sorting, fragmentation, burning, it is characterized in that: technical process comprises broken bag → Bulky Waste sorting → deodorizing → non-combustible waste screening → deodorizing → magnetic separation → fragmentation → vanning → material loading → feeding → burning → calcining, refuse classification factory building and whole processing line take totally-enclosed negative-pressure design, be provided with three outlets of a garbage inlet and non-combustible waste, combustiblerefuse and metal, rubbish passes through travelling belt, case respectively after screening, fragmentation, be transported to different process places, and be provided with apparatus of air conditioning.
Chinese patent CN200410066088.3, utilizes the method for New Type Dry-process Cement Production system process domestic waste.The method is divided into four steps: one, carry out sorting, break process to the domestic waste collected; Two, when the total content of chlorine in plastics is too high, when exceeding control criterion requirement, secondary sorting is carried out to combustiblematerialss such as the plastics sub-elected, waste paper, plant leafs, plastic containing chlorine is sub-elected and separately deals with; The parts not directly for burning such as the dregs three, sub-elected, glass-ceramic, kitchen are remaining, evenly admix a certain amount of raw meal powder or kiln ash, homogenizing process is carried out while the excess fermentation of containment kitchen, then the batching of cement raw material is participated in, deliver in raw mill, drying, grinding become cement raw meal, enter homogenizing storehouse homogenizing and store, then feed firing system together.The combustiblematerials parts such as the plastics after the paper four, sub-elected, fabric, plant leaf and secondary sorting, after in small, broken bits, send into firing system as manufacture of cement alternative fuel.
Chinese patent CN200520069460.6, utilizes New Type Dry-process Cement Production system process domestic waste device.This device is arranged sewage and is disposed by raw material grinding mill, domestic refuse sub-elects secondary fuel, finely ground particle substance, metal through trommel screen, belt conveyor, winnowing machine, tramp iron separator, packing machine, one-level crusher, two stage cylinder sieve, reciprocating sieve, secondary breaker etc., secondary fuel is directly as fuel, finely ground particle substance adds kiln ash or after cement slurry stirs, deliver to alternative materials stockyard, be transported in raw material grinding mill the preparation participating in cement slurry as alternative materials.
Rubbish drawing-in device aspect, the feeding machine that Chinese patent CN96119014.0 garbage incineration method and equipment use is spiral feeding machine.Chinese patent CN200920164754.5 uniform rotary air locking feeder, rotates by rake hopper, cylinder the vertical structure equipment that feeder, leaf wind blocker, temperature resistant encapsulation storehouse, material-conveying belt, feed inlet and outlet etc. form.The former is both helical pushing-pulling-pressing type, pressing waste by feeding garbage equipment, can not loose charging, easily produces bonding and can not thorough after-flame fast, easily produces hazardous material synthesis.A kind of employing cylinder dividing plate charging below, solves pressing waste closely and not loose problem, but adopts sector structure between feeding dividing plate, require high, and do not solve the problem of domestic refuse real time measure feeding to refuse breaking.
Garbage-incineration smoke purifying aspect, Chinese patent CN200810136801.5 method for purifying and processing cement revolving tubular kiln cooperated with consumer waste incineration flue gas, this technical patent introduces the gas of consumer waste incineration generation after depickling and dedusting, send into cement kiln and carry out secondary burning, finally flue gas is passed into moving-bed type packing tower, effectively reduce chilling link and acid gas purifying device in conjunction with cement industry, reduce purifying treatment step and run and consume, reduce the input for the treatment of facility simultaneously, indices is all better than " consumer waste incineration Environmental capacity standard " (GB18485-2001).
People's feasibility studies such as Yang Qian cement rotary kiln synergic processing process is flexible, incineration system stablizes high temperature, objectionable constituent can at high temperature effectively be decomposed, Absorbable rod deleterious acidic gas, heavy metal ion is solidificated in grog, avoid again spreading (domestic refuse as the feasibility of cement slurry, chemical engineering and equipment, 2012 (7), 195-197)).
For making waste incineration more perfect, in garbage dewatering, have also been made technological development:
Chinese patent CN201110122405.9, one way of life waste energy regeneration treatment process.The mode that this patented technology introduction is dried through broken press dewatering by rubbish, high temperature granulation obtains solid fuel.
Chinese patent CN201110275226.9, the efficient burning electricity generation system of domestic waste.Introduce rubbish adopt sub-elect the high large particulate matter of water ratio carry out degrade extruding dry mode dewater, obtain regenerated fuel.
In " the dehydration research of organic matters in municipal solid waste " literary composition that Tianjin Dewei Environmental Engineering Equipment Co., Ltd. has delivered, with sulfuric acid catalyzed degradation corn cob at 180 DEG C, after process 4h, water ratio reduces about 36.76%.
It is 3d that Yang Cheng not determines rubbish most optimal retention time in pond, ground by changing conditions such as the unit weight to rubbish, water ratio, thermal values, article mentions rubbish after some residence time it because of physical impact and fermentation, moisture content obviously declines, thermal value also has the very significantly rising (dehydration experiment of rubbish in simulation incineration plant melt pit, environmental hygiene engineering, 2004,12 (1), 43-44).
The quality of consumer waste incineration treatment effect, depends on pretreating effect, and rubbish can improve waste incineration effect by effectively dewatering.Utilize the method for microorganism to the old dehydration of domestic refuse to apply less at home in domestic refuse pre-treatment, naturally storing up fermentation and disposing household garbage dewatering overlong time, be unfavorable for disposing fast newly-increased domestic refuse every day.
In existing technology, remain domestic refuse without fineness cracking and sorting effect comparatively high, the rubbish mixing of Customers ' Legal Right and sorting long flow path, sorting cost not evenly cause effectively reducing in the more difficult control of the unstable furnace temperature of refuse thermal value, preprocessing process the problems such as thermal losses when msw water content technique causes waste incineration is large.Current drawing-in device also exist extruding feeding manner cause rubbish to enter kiln closely can not rapid dispersion and after-flame cause easily being formed hazardous material, rotation lock wind feeding manner highlyer causes the problem that pre-treatment is complicated and operation cost is higher to rubbish Pre-sorting and broken requirement.
summary of the invention:
The object of the invention is:
For the technical problem that existing life refuse processing method and equipment exist, reduce domestic refuse water ratio, improve mean calorie and shatter value, increase metal elimination factor, reduce adhesion conglomeration, can not rapid dispersion burning and the large problem of the too high thermal losses caused of water ratio when solving domestic refuse feeding and burn, complete at the disposable feeding of the whole process of domestic rubbish disposal, do not produce secondary pollution, really realize the full minimizing of domestic refuse, resource utilization and innoxious, full process, zero release and a kind of method of new dry process rotary kiln burning domestic garbage is provided.
Technical scheme of the present invention is:
By domestic refuse by after fragmentation, join domestic refuse and the zymophyte pretreatment unit of my design, mix with fermentative microflora, utilize zymophyte to remove portion of water to the heat of vaporization produced in the old effect of domestic refuse and old process.After the domestic refuse magnetic separation metal dewatered by fermentation, the metering-type of my design lock wind homogenizer is utilized to feed decomposing furnace in along the tertiary air mouth of pipe and decomposing furnace intersection along tertiary-air pipe tangential direction by domestic refuse, by means of in the air-flow Sum decomposition stove that tertiary air is formed in kiln about 900 DEG C stablize hot conditions fast to Domestic refuse scattering, ignite, calcining, objectionable impurities is effectively transformed under alkaline reduction atmosphere and solidify to form stable innoxious substance in kiln, lime-ash after thoroughly destroying by fire relies on deadweight to falling in new dry process rotary kiln rotary calciner body, ratio according to 5% and cement producting material mixing match are calcined, by the stable high temperature of solid materials temperature in kiln 1450 DEG C with gas temperature 1750 DEG C, make the SiO in domestic refuse and other raw material
2, Al
2o
3, Fe
2o
3, CaO chemistry and physical reaction in generate C
3s, C
2s, C
3h, C
4hF etc. incorporate in Cement clinker buring vitreum, about 120 DEG C are dropped to from 1450 DEG C by comb formula Chiller, cement is made according to different demand and ratio are levigate together with blended material through grinding system, heavy metal through transforming and solidify is solidificated among fine and closely woven cement lattice by the aquation coagulation of cement and no longer separates out, whole process thoroughly realizes the disposable ultimate process of domestic refuse, full process, zero release.
The present invention is achieved in that
A kind of method of new dry process rotary kiln burning domestic garbage, comprise the technological process of fragmentation, dehydration, magnetic separation, transmission, feeding, burning, whole processing line takes totally-enclosed negative-pressure design, be provided with the metering import of domestic refuse and mineral and municipal waste and the outlet of two, metal, mineral and municipal waste directly transfers to feed system by transport tape, be provided with apparatus of air conditioning in pretreatment workshop, key step is:
(1) broken: the crusher of the shearing broken blade that combines with hook formula adopting the metals such as clothing, mattress, tire, timber and the reinforcing bar ensureing to carry secretly in domestic refuse simultaneously effectively broken, by composite water cut be the Domestic garbage crushing of 45-60% to 80mm particle diameter, percolate reclaim for subsequent use;
(2) dewater: the domestic refuse after fragmentation adopts rotating speed to be 6-18r/min, the zymogenic drum-type homogenization machine of configuration automatic spray, with the part by weight of domestic refuse and zymocyte liquid for 2000: 1-2, domestic refuse after homogenize freely falls into the old pond of domestic refuse, after old 1.5-2 days, turning in every 24 hours once, leavening temperature controls between 55-73 DEG C, zymophyte Fast-propagation, organism generation biochemical reaction in domestic refuse and degrading, effectively break biological cell wall in domestic refuse, leach the moisture be full of in biological cell wall, and by zymophyte to the heat of vaporization portion of water produced in the old process of domestic refuse, domestic refuse was through the old dehydration of 3-5 days, or in the winter time through the old dehydration of 4-7 days, zymophyte has been decomposed domestic refuse and has produced foul gas organic substance, organic sulfide, organonitrogen, and suppress the growth of spoilage microorganisms, domestic garbage comprehensive water ratio is reduced to less than 36%, obtain loose adhesion, be beneficial to the domestic refuse of burning.Whole ageing silo is that negative pressure state is carried out, and old pond is provided with diversion trench and collects Leachate site, and pneumatic outlet is provided with dewatering unit and biological treatment facility;
(3) magnetic separation: in domestic refuse, metal is mainly iron wire, bottle cap, adopts the general belt type magnetic separator magnetic separation of current domestic maturation to reclaim; Copper, aluminium and other metalloid content are less, can not have an impact, do not carry out sorting to manufacture of cement;
(4) carry: adopt belt-type transmission system that the domestic refuse after magnetic separation is transported to feed system, transport tape is according to operational throughput and the nonstandard making of required distance, and conveying belt is provided with buncher, adjusts transfer rate according to demand; Domestic refuse after broken and processed is directly transferred to the rewinding storehouse of feed system by conveying belt from pretreatment workshop by angle of inclination;
(5) feeding: feeding adopts metering-type airlock feeding machine, utilizes rake cloth and two-door spaced valve board-like circulation lock wind facies to combine and realizes uniform distribution and lock feeding; Speed governing Electronic control equipment and electronics continuous metering device are installed simultaneously, next loose domestic refuse will be transmitted according to the in good time feeding of condition for validity every in new dry process rotary kiln by material-conveying belt, feeding can be stopped immediately, the environmental protection harm preventing domestic refuse in burning process because the change of burning condition produces when burning condition produces larger fluctuation;
(6) burn: by metering-type airlock feeding machine, domestic refuse is tangentially fed in decomposing furnace from decomposing furnace tertiary-air pipe ingress, the air-flow that formed in kiln by tertiary air drives domestic refuse rapid dispersion under 900 DEG C of stable hot conditionss in decomposing furnace, ignite, calcining, objectionable impurities is effectively transformed under alkaline reduction atmosphere and solidify to form stable innoxious substance in kiln, lime-ash after thoroughly destroying by fire is because of influence of gravity, to falling in new dry process rotary kiln rotary calciner body, ratio according to 5% and cement producting material mixed calcining, by the high temperature of solid materials in kiln 1450 DEG C with gas 1750 DEG C, make the SiO in domestic refuse and other raw material
2, Al
2o
3, Fe
2o
3, CaO chemistry and physical reaction in generate C
3s, C
2s, C
3h, C
4hF etc. incorporate in Cement clinker buring vitreum, about 120 DEG C are dropped to from 1450 DEG C by comb formula Chiller, make cement through grinding system according to different demand and ratio are levigate together with blended material, the heavy metal through transforming and solidify is solidificated among fine and closely woven cement lattice by the aquation coagulation of cement and no longer separates out, whole domestic rubbish disposal process thoroughly realizes the disposable ultimate process of domestic refuse, full process, zero release.
Above-described zymophyte cultivates by broken domestic refuse and percolate propagation the zymophyte existed, adopt the condition keeping temperature 40-60 DEG C therefrom preferably to breed and extract resistant to elevated temperatures zymophyte, mainly comprise subtilis (Bacillus subtilis (Ehrenberg) Cohn), Bacillus licheniformis (Bacillus licheniformis), Bacillus macerans (Latin Name Bacillus macerans Schardinger), Trichodermareesei (Trichodermareesei), series bacillus (Paenibacillus Ash) etc.; Zymophyte 25-30 DEG C, pH value 4.5-8.5, every 12 hours of aeration 1 are little is that substratum cultivates 12-24 hour at present with corn juice, are diluted to living bacteria count >=1.0 × 1000cfu/kg during use.
The supporting machinery equipment that the above technique adopts is standard equipment or non-standard equipment.
Advantage of the present invention and effect:
1, the method for a kind of new dry process rotary kiln burning domestic garbage of the present invention is that domestic refuse is first carried out fragmentation, is directly fed in new dry process rotary kiln decomposing furnace burn after a magnetic separation Footwall drift by transport tape and metering feeding system.Simplify sorting process, improve metal elimination factor, reduce sorting flow process and pre-treatment expense.
2, the present invention passes through to add zymophyte to the quick old dehydration of domestic refuse after domestic refuse first being carried out to fragmentation, reduces domestic refuse unit weight and water ratio, improves domestic refuse mean calorie, reduce the energy waste in incineration process of domestic garbage.
3, after the present invention passes through first to carry out fineness fragmentation and old dehydration to domestic refuse, improve domestic refuse shatter value, increase metal magnetic separation elimination factor, solve simultaneously rubbish cause adhesion to unite in feeding cement kiln decomposing furnace because water ratio is too high can not the problem of rapid dispersion and quick after-flame, guarantee domestic refuse enter kiln after destroy rate by fire fast.
4, the present invention is by the invention to feed system, effectively relaxes sorting consumer waste classification and broken requirement, reduces pre-treatment expense, improves the quantized data management of metering feeding.
5, the present invention sets the multiple on-line metering system of material feeding and discharging and feeding, TV monitoring system, online data statistical system, detection system, data are shared online with supervision unit, improve On-line monitor security level, improve the ability to supervise to domestic rubbish disposal.
6, domestic refuse reception, broken and microorganism evaporation plant employing hermetic design, keep tiny structure, be provided with purifying air treatment facility simultaneously.Purifying air treatment facility adopts the biologic treating technique of current domestic maturation, ensures that the air in domestic refuse reception, fragmentation and microorganism dehydration is effectively purified, prevents foul smell on the impact of surrounding environment.The disposable feeding of whole process completes, and does not produce secondary pollution, really realizes the full minimizing of domestic refuse, resource utilization, innoxious, full process and zero release.
accompanying drawing explanation:
Fig. 1 is process flow diagram of the present invention.
embodiment:
Below in conjunction with accompanying drawing, the present invention is described in detail.
embodiment 1
Domestic refuse pours rubbish storage pond into after weighing, rubbish storage pond leachate collecting utilizes, the domestic refuse in rubbish storage pond being added receiver bin is in the broken machine of 1170mm × 2555mm, with the cut broken blade that to combine with hook formula, the clothing carried secretly in domestic refuse, mattress, tire, timber and reinforcing bar etc. are carried out break process, broken below particle diameter 80mm.Domestic refuse after fragmentation enters drum-type homogenization machine through inclined hopper, temperature 25 DEG C is kept passing through with biological spraying machine, pH value is 8.5, under every 12 hours of aeration condition of 1 hour propagation dilution for living bacteria count be 1.0 × 1000cfu/kg Leachate site zymophyte with the part by weight of domestic refuse and zymocyte liquid for 2000:2 is sprayed onto the surface of domestic refuse, take rotating speed as 18r/min homogenize mixing, domestic refuse landing after mixing to domestic refuse stores dehydration pond, driving grab bucket is stored up the domestic refuse pick-and-place adding microorganism old to storage dehydration pond, after old 1.5 days, turning in every 24 hours once, leavening temperature controls between 55-73 DEG C, domestic refuse was through the old dehydration of 5 days, domestic garbage comprehensive water ratio is reduced to 34%, obtain loose adhesion, be beneficial to the domestic refuse of burning, whole ageing silo is that negative pressure state is carried out, old pond is provided with diversion trench and collects Leachate site, pneumatic outlet is provided with dewatering unit and biological treatment facility.
The domestic refuse of old dehydration, the deironing of rubbish tramp iron separator is sent into driving grab bucket, the anhydrobiosis rubbish of deironing is transported to the other hopper of cement kiln decomposing furnace by transfer roller, domestic refuse enters lock feeding device by electronic constant track scale, gravity is utilized to fall on transfer roller, material feeds in new dry process rotary kiln decomposing furnace through closed cabin and feed valve along tertiary-air pipe tangential direction by material-conveying belt, the air-flow that formed in kiln by tertiary air drives domestic refuse rapid dispersion under 900 DEG C of stable hot conditionss in decomposing furnace, ignite, calcining, objectionable impurities is effectively transformed under alkaline reduction atmosphere and solidify to form stable innoxious substance in kiln, lime-ash after thoroughly destroying by fire is because of influence of gravity, to falling in new dry process rotary kiln rotary calciner body, ratio according to 5% and cement producting material mixed calcining, by the high temperature of solid materials in kiln 1450 DEG C with gas 1750 DEG C, make the SiO in domestic refuse and other raw material
2, Al
2o
3, Fe
2o
3, CaO chemistry and physical reaction in generate C
3s, C
2s, C
3h, C
4hF etc. incorporate in Cement clinker buring vitreum, drop to about 120 DEG C by comb formula Chiller from 1450 DEG C, make cement through grinding system according to different demand and ratio are levigate together with blended material, it is 0.28% iron wire, bottle cap metal that magnetic separation obtains accounting for domestic refuse ratio.
embodiment 2
Domestic refuse pours rubbish storage pond into after weighing, rubbish storage pond leachate collecting utilizes, the domestic refuse of rubbish storage pool being added receiver bin is in the broken machine of 1170mm × 2555mm, with the cut broken blade that to combine with hook formula, the clothing carried secretly in domestic refuse, mattress, tire, timber and reinforcing bar etc. are carried out break process, broken below particle diameter 75mm.Domestic refuse after fragmentation enters drum-type homogenization machine through inclined hopper, temperature 28 DEG C is kept passing through with biological spraying machine, the dilution of every 12 hours of aeration condition of 1 hour propagation for living bacteria count 1.3 × 1000cfu/kg Leachate site zymophyte with the part by weight of domestic refuse and zymocyte liquid for 2000:2.5 is sprayed onto the surface of domestic refuse, take rotating speed as 10r/min homogenize mixing, rubbish landing after mixing to domestic refuse stores dehydration pond, driving grab bucket is stored up the rubbish pick-and-place adding microorganism old to storage dehydration pond, after old 2 days, turning in every 24 hours once, leavening temperature controls between 55-73 DEG C, domestic refuse was through the old dehydration of 3 days, domestic garbage comprehensive water ratio is reduced to 35.3%, obtain loose adhesion, be beneficial to the domestic refuse of burning.Whole ageing silo is that negative pressure state is carried out, and old pond is provided with diversion trench and collects Leachate site, and pneumatic outlet is provided with dewatering unit and biological treatment facility.
The domestic refuse of old dehydration, the deironing of domestic refuse tramp iron separator is sent into driving grab bucket, the anhydrobiosis rubbish of deironing is transported to the other hopper of cement kiln decomposing furnace by transfer roller, domestic refuse enters lock feeding device by electronic constant track scale, gravity is utilized to fall on transfer roller, material feeds in new dry process rotary kiln decomposing furnace through closed cabin and feed valve along tertiary-air pipe tangential direction by material-conveying belt, the air-flow that formed in kiln by tertiary air drives domestic refuse rapid dispersion under 900 DEG C of stable hot conditionss in decomposing furnace, ignite, calcining, objectionable impurities is effectively transformed under alkaline reduction atmosphere and solidify to form stable innoxious substance in kiln, lime-ash after thoroughly destroying by fire is because of influence of gravity, to falling in new dry process rotary kiln rotary calciner body, ratio according to 5% and cement producting material mixed calcining, by the high temperature of solid materials in kiln 1450 DEG C with gas 1750 DEG C, make the SiO in domestic refuse and other raw material
2, Al
2o
3, Fe
2o
3, CaO chemistry and physical reaction in generate C
3s, C
2s, C
3h, C
4hF etc. incorporate in Cement clinker buring vitreum, about 120 DEG C are dropped to from 1450 DEG C by comb formula Chiller, make cement through grinding system according to different demand and ratio are levigate together with blended material, it is 0.29% iron wire, bottle cap metal that magnetic separation obtains accounting for domestic refuse ratio.
embodiment 3
Domestic refuse pours rubbish storage pond into after weighing, rubbish storage pond leachate collecting utilizes, the rubbish alive of rubbish storage pool is added in broken machine, with the cut broken blade that to combine with hook formula, the clothing carried secretly in domestic refuse, mattress, tire, timber and reinforcing bar etc. are carried out break process, broken below particle diameter 80mm.Domestic refuse after fragmentation enters drum-type homogenization machine through inclined hopper, temperature 30 DEG C is kept passing through with biological spraying machine, the dilution of every 12 hours of aeration condition of 1 hour propagation for living bacteria count 1.1 × 1000cfu/kg Leachate site zymophyte with the part by weight of domestic refuse and zymocyte liquid for 2000:1.5 is sprayed onto the surface of domestic refuse, take rotating speed as 6r/min homogenize mixing, domestic refuse landing after mixing to rubbish stores dehydration pond, driving grab bucket is stored up the domestic refuse pick-and-place adding microorganism old to storage dehydration pond, after old 1.8 days, turning in every 24 hours once, leavening temperature controls between 55-73 DEG C, domestic refuse was through the old dehydration of 6 days, domestic garbage comprehensive water ratio is reduced to 36%, obtain loose adhesion, be beneficial to the domestic refuse of burning, whole ageing silo is that negative pressure state is carried out, old pond is provided with diversion trench and collects Leachate site, pneumatic outlet is provided with dewatering unit and biological treatment facility.
The domestic refuse of old dehydration, the deironing of domestic refuse tramp iron separator is sent into driving grab bucket, the anhydrobiosis rubbish of deironing is transported to the other hopper of cement kiln decomposing furnace by transfer roller, domestic refuse enters lock feeding device by electronic constant track scale, gravity is utilized to fall on transfer roller, material feeds in new dry process rotary kiln decomposing furnace through closed cabin and feed valve along tertiary-air pipe tangential direction by material-conveying belt, the air-flow that formed in kiln by tertiary air drives domestic refuse rapid dispersion under 900 DEG C of stable hot conditionss in decomposing furnace, ignite, calcining, objectionable impurities is effectively transformed under alkaline reduction atmosphere and solidify to form stable innoxious substance in kiln, lime-ash after thoroughly destroying by fire is because of influence of gravity, to falling in new dry process rotary kiln rotary calciner body, ratio according to 4.5% and cement producting material mixed calcining, by the high temperature of solid materials in kiln 1450 DEG C with gas 1750 DEG C, make the SiO in domestic refuse and other raw material
2, Al
2o
3, Fe
2o
3, CaO chemistry and physical reaction in generate C
3s, C
2s, C
3h, C
4hF etc. incorporate in Cement clinker buring vitreum, drop to about 120 DEG C by comb formula Chiller from 1450 DEG C, make cement through grinding system according to different demand and ratio are levigate together with blended material.It is 0.26% iron wire, bottle cap metal that magnetic separation obtains accounting for domestic refuse ratio.
Claims (1)
1. the method for a dry-process cement rotary kiln burning domestic garbage, it is characterized in that: the technological process comprising fragmentation, dehydration, magnetic separation, transmission, feeding, burning, whole processing line takes totally-enclosed negative-pressure design, be provided with the metering import of domestic refuse and old rubbish and the outlet of two, metal, old rubbish directly transfers to feed system by transport tape, be provided with apparatus of air conditioning in pretreatment workshop, key step is:
(1) broken: the crusher of the shearing broken blade that combines with hook formula that clothing, mattress, tire, timber and the metal carried secretly in employing guarantee domestic refuse are simultaneously effectively broken, by composite water cut be the Domestic garbage crushing of 45-60% to 80mm particle diameter, percolate reclaim for subsequent use;
(2) dewater: the domestic refuse after fragmentation adopts rotating speed to be 6-18r/min, the zymogenic drum-type homogenization machine of configuration automatic spray, with the part by weight of domestic refuse and zymocyte liquid for 2000: 1-2, domestic refuse after homogenize freely falls into the old pond of domestic refuse, after old 1.5-2 days, turning in every 24 hours once, leavening temperature controls between 55-73 DEG C, zymophyte Fast-propagation, organism generation biochemical reaction in domestic refuse and degrading, effectively break biological cell wall in domestic refuse, leach the moisture be full of in biological cell wall, and by zymophyte to the heat of vaporization portion of water produced in the old process of domestic refuse, domestic refuse was through the old dehydration of 3-5 days, or in the winter time through the old dehydration of 4-7 days, zymophyte has been decomposed domestic refuse and has produced foul gas organic substance, organic sulfide, organonitrogen, and suppress the growth of spoilage microorganisms, domestic garbage comprehensive water ratio is reduced to less than 36%, obtain loose adhesion, be beneficial to the domestic refuse of burning, whole ageing silo is that negative pressure state is carried out, and old pond is provided with diversion trench and collects Leachate site, and pneumatic outlet is provided with dewatering unit and biological treatment facility,
(3) magnetic separation: in domestic refuse, metal is mainly iron wire, bottle cap, adopts the general belt type magnetic separator magnetic separation of current domestic maturation to reclaim; Copper, aluminium and other metalloid content are less, can not have an impact, do not carry out sorting to manufacture of cement;
(4) carry: adopt belt-type transmission system that the domestic refuse after magnetic separation is transported to feed system, transport tape is according to operational throughput and the nonstandard making of required distance, and conveying belt is provided with buncher, adjusts transfer rate according to demand; Domestic refuse after broken and processed is directly transferred to the rewinding storehouse of feed system by conveying belt from pretreatment workshop by angle of inclination;
(5) feeding: feeding adopts metering-type airlock feeding machine, utilizes rake cloth and two-door spaced valve board-like circulation lock wind facies to combine and realizes uniform distribution and lock feeding; Speed governing Electronic control equipment and electronics continuous metering device are installed simultaneously, next loose domestic refuse will be transmitted according to the in good time feeding of condition for validity every in dry-process cement rotary kiln by material-conveying belt, feeding can be stopped immediately, the environmental protection harm preventing domestic refuse in burning process because the change of burning condition produces when burning condition produces larger fluctuation;
(6) burn: by metering-type airlock feeding machine, domestic refuse is tangentially fed in decomposing furnace from decomposing furnace tertiary-air pipe ingress, the air-flow that formed in kiln by tertiary air drives domestic refuse rapid dispersion under 900 DEG C of stable hot conditionss in decomposing furnace, ignite, calcining, objectionable impurities is effectively transformed under alkaline reduction atmosphere and solidify to form stable innoxious substance in kiln, lime-ash after thoroughly destroying by fire is because of influence of gravity, to falling in dry-process cement rotary kiln rotary calciner body, ratio according to 5% and cement producting material mixed calcining, by the high temperature of solid materials in kiln 1450 DEG C with gas 1750 DEG C, make the SiO in domestic refuse and other raw material
2, Al
2o
3, Fe
2o
3, CaO chemistry and physical reaction in generate C
3s, C
2s, C
3h, C
4hF incorporates in Cement clinker buring vitreum, about 120 DEG C are dropped to from 1450 DEG C by comb formula Chiller, make cement through grinding system according to different demand and ratio are levigate together with blended material, the heavy metal through transforming and solidify is solidificated among fine and closely woven cement lattice by the aquation coagulation of cement and no longer separates out, whole domestic rubbish disposal process thoroughly realizes the disposable ultimate process of domestic refuse, full process, zero release,
Zymophyte described in above step (2) cultivates by broken domestic refuse and percolate propagation the zymophyte existed, adopt and keep temperature 40-60 DEG C of propagation to extract resistant to elevated temperatures zymophyte, mainly comprise subtilis (Bacillus subtilis (Ehrenberg) Cohn), Bacillus licheniformis (Bacillus licheniformis), Bacillus macerans (Latin Name Bacillus macerans Schardinger), Trichodermareesei (Trichodermareesei), series bacillus (Paenibacillus Ash); Zymophyte 25-30 DEG C, pH value 4.5-8.5, every 12 hours of aeration 1 are little is that substratum cultivates 12-24 hour at present with corn juice, are diluted to living bacteria count >=1.0 × 1000cfu/kg during use.
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| CN110779754A (en) * | 2019-10-29 | 2020-02-11 | 中国葛洲坝集团水泥有限公司 | Sampling and sample preparation method for cooperatively treating household garbage by cement kiln |
| CN111825359A (en) * | 2020-08-27 | 2020-10-27 | 重庆三颗草科技有限公司 | Crushing and pre-burning furnace device for co-processing semi-solid waste in cement kiln |
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