Summary: The safety of dangerous trash deals with is the problem that people pays close attention to all the time. Introduced the combustion system of rotary kiln. Typical dangerous trash handles a process, make clear through project example, reactor of fast and cooling tower, dry type, hop-pocket removes dust, flue gas of combustion of washer combination craft, can implement pollutant discharge standard. Burn in destroying trash effectively poisonous, harmful with organic waste material, it is implementation reduces the technology with dangerous trash and very fast, more effective hurtless. Cremate processing applies to dangerous trash, do not suit to reclaim its useful composition, have fair calorific value. Through 20 old development, abroad is used at dangerous trash to burn technical processing is quite mature already, can you use at the processing: of incinerator of industrial danger trash? Does of dice of ⒘ of of chapter of muching in the company of of Ran of ⑷ of of chapter of in the company of of Zhuo of white of Ze of standing grain of ⒁ of of chapter of in the company of of し of cut down predict ⒍ of of chapter of in the company of to whiz noise of of Lu of eight of of chapter of Zhui in the company of steals cowardly of of chapter of in the company of of し of of cut down of of school of solemn F washing with watercolors rotten Shen?
Introductive: ? Very hot Chen of mildew of χ of of of ば of Qi of of sunlight standing tall and upright holds adze border to sweet wine onlying of to joke of of Jin Jiao Piao Jun multiplies large bamboo hat of of Ai to pound willful of the widow that seek take counsel to iron Chen to hold Di of of N of californium χ deceive to carry χ of of of Qi ば mildew. Policy encourages the new technology of research and development to have: Deal with in coordination the cement kiln of solid trash decreases a technology in the contaminant in producing a course; Rise to deal with in coordination the cement kiln that solid trash measures is efficient use a technology, if cast the solid that increase an amount to abandon system of combustion leaving a line greatly; Deal with in coordination the efficient pretreatment technology of solid trash, if high quality rubbish derives fuel (RDF) preparation technology. Cement kiln deals with in coordination life rubbish is life rubbish handles one of advanced methods. Secondly flower makes different technology odds and generation amount are different, the rubbish of different technology enters cremate of furnace moisture, generation to enrage (or hot vent one's anger) the means of calorific value, ignition that start, hot carrier enters furnace means of refrigeration of temperature, broken bits, heat uses efficiency to wait to also differ. Analyse all sorts of craft correctly to actor or actress defect is helpful for raising cement kiln to deal with in coordination level of life rubbish technology, promote the development of this technology.
1, rotary kiln burns system
Sketch map 1
1.1 fundamental
Rotary kiln incinerator, weigh rotary kiln again, evolve from cement rotary kiln and come. Main body is a kind of horizontal cylinder housing that can rotate, housing is made by armor plate, line is fireproof material. The protection of the axes of pipe and water level. Have certain inclination, solid and semisolid trash from high end (the head) enter pit through taking makings chance inside, move adagio to the rear as the whirl of cylinder body. Kiln body rotates make stock is in combustion and combustion airy process sufficient contact, complete the whole process of body of dry, combustion, combustion, air cylinder, enter the character of firebox and fuel broken bits, discharge by the ash of the plane and broken bits. According to heat vital energy and solid flow direction different, or the heat source in rotary kiln (burner) the position, rotary kiln can be divided mix for upper reaches downstream two kinds of forms, undertake saving on the ongoing direction of rotary kiln. Flue gas discharge is identical, also call refluent. The design of rotary kiln agrees with into makings and pretreatment, can increase the time of flue gas, burn in dangerous trash get applied extensively in the system. Refluent rotary kiln more apply to moisture content the dangerous trash with tall or low calorific value (like mud) .
1.2 typical craft
Rotary kiln incinerator has extensive material applicability, can handle the dangerous waste material of solid, liquid and gas at the same time. Rotary kiln is a hollow steel bottle, have slight declining liner and firebrick, normally very long. The of all kinds and dangerous trash that passes pretreatment and compatibility enters combustion system through different feed means, rotate of gravity and rotary kiln continuously in oneself, the body of heater below wasteful impetus retroflexions and combustion air is contacted adequately, finish dry (water evaporates) , aerification and combustion process, the intake air heater that remains after becomes broken bits, broken bits is sealed through water machine is continuous discharge.
2, crucial equipment analysis is discussed
2.1 vertical incinerator
Sketch map 2
Vertical incinerator is the suits rubbish cremate furnace that is based on development of traditional vertical furnace model. Vertical incinerator with the structure simple, the operation is convenient, the characteristic of treating capacity moderate deals with in coordination in cement kiln get applied in life rubbish craft. Its use upside to give makings, upside to vent one's anger into makings, bottom, bottom (or the waist) run mode of the flaming that feed oxygen, it is furnace of basic traditional to calcine model one of. The main function of vertical incinerator is combustion or cremate. Life rubbish burns or the organic matter grey broken bits after cremate follows cremate gas to enter cement kiln system directly, 5% what the bulk of inorganic broken bits is less than former rubbish bulk. Content of the solid in inorganic broken bits is tile of ceramics of metal, contented, brick, glass to wait, metallic content sorting reclaims; Broken bits of inorganic of sorting the rest is used as cement raw material; Flue gas of high temperature of generation of organic matter combustion, dust and the cremate that contain calorific value enrage those who send to cement kiln to decompose furnace heat addition and degradation beforehand 2 flower.
2.2 circumgyrate heat solves furnace
The ATP furnace that circumgyrate heat solves furnace is the industry of oil refining of oil sand oil shale that is based on technology of rotary kiln general character and Ga strap the rubbish that develops on furnace foundation especially hot solution furnace. Use at the rotary kiln of to calcine unlike convention, the furnace that heat up solution is to will warm up to higher temperature (650 ℃ are controlled) solid hot carrier and normal temperature rubbish solve furnace to mix to deliver quantity of heat rubbish into makings end in heat, make rubbish is in do not have oxygen or the temperature that heat up solution is reached below the condition of little oxygen (400~450 ℃ ) , generate 2 flower the hot vent one's anger with very few content and broken bits. Broken bits is in kiln head (give makings end) continue to heat to higher temperature (650~750 ℃ ) hind partial high temperature through the screening inside furnace fine broken bits sends to kiln head to mix hot solution into makings end and rubbish again. The part heats up vent one's anger to be heat addition of the furnace that heat up solution as fuel; Redundant hot vent one's anger sends to cement kiln to decompose furnace beforehand as fuel, be in the degradation in decomposing furnace beforehand. The generation after the hot vent one's anger that heat addition of the furnace that heat up solution carries burns contains oxygen to measure less high temperature flue gas (800 ℃ above) arrive from kiln head in the process of going from place to place of kiln end also deliver quantity of heat rubbish, achieve the effect of hot solution likewise. The way that rubbish heat sees is based on afore-mentioned solid to heat up carrier law and contact inspection of high temperature flue gas. In the whole process that heat up solution, rubbish and the odds that oxygen contacts are small, consequently 2 flower generation capacity is little also.
2.3 dryer
The part that the heat source of rubbish dryer comes from cold machine of comb with a double-edged fine-toothed comb or waste gas of all high temperature (about 250 ℃ ) . No matter be dryer of type of comb with a double-edged fine-toothed comb or circumgyrate dryer, average temperature is in the rubbish inside dryer 150 ℃ left and right sides. In carbonadoing dry gas is used at cold machine of comb with a double-edged fine-toothed comb to enter pit eventually as cooling gas, make stoving enrages more than heat to get reasonable use.
3, critical process analysis is discussed
3.1 furnace with 2 flower generate
The distinction of the furnace that heat up solution and vertical incinerator function is hot solution and burn. Although arise eventually inorganic broken bits is basic and identical, but hot solution and combustion mechanism are having substaintial distinction. Former it is will organic matter is in do not have oxygen or heat below anoxic condition, the chemistry of the burns gas, moderate member fuel that makes splitting decomposition of catenary of hydrogen of high polymer carbon is given priority to for small element hydrocarbon and carbon black mixture decomposes a process, latter is a hydrocarbon in the oxidation exothermic reaction that oxygen or oxygen boosting condition fall, generate CO2 and H2O. Burn law easy generation is many 2 flower with furan, and 2 flower it is one of organic thing that special noxiousness has on the world at present. In flaming oxidation reaction and plastic products chloric it is 2 flower generated ambient conditions, although high temperature of 800 ℃ above can decompose much 2 flower, but active atom makes the hot appearance of aflame heavy metal again 2 flower reductive accelerant, generate 2 afresh below the temperature environment of 300~500 ℃ flower. Rubbish heats up solution is to be in do not have oxygen or undertake to rubbish high temperature heats below anoxic environment the process that makes its heat up splitting decomposition. Rubbish heated up solution to put an end to oxidation reaction to create a condition not only, and reduce 2 flower before of body other people generate, from go up at all restrain 2 flower generation. Because the heavy metal in rubbish does not have the condition that high temperature oxidizes, generate not easily promote 2 flower generated activator, can say to put an end to 2 from fountainhead consequently flower generate.
The 3.2 quantities that use oxygen
Of CO2 generate quantity vertical incinerator to deal with in coordination the rubbish of craft is before cremate without stoving dehydrate, water content is 20% the left and right sides (summertime water content is higher) , need to mingle right amount coal ability cremate in rubbish even. Accordingly not beforehand the CO2 of stoving processing rubbish makes an amount tall. Because rubbish water content is high,bring about cremate at the same time gas calorific value is inferior, cremate gas calorific value solves the stability of furnace to have certain effect under 3500kJ/Nm3 bisect.
Epilogue: ?
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