CN2606262Y - Low-pollution refuse burning systems - Google Patents

Low-pollution refuse burning systems Download PDF

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Publication number
CN2606262Y
CN2606262Y CN 03223803 CN03223803U CN2606262Y CN 2606262 Y CN2606262 Y CN 2606262Y CN 03223803 CN03223803 CN 03223803 CN 03223803 U CN03223803 U CN 03223803U CN 2606262 Y CN2606262 Y CN 2606262Y
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CN
China
Prior art keywords
rotary kiln
firing chamber
combustion
housing
dual firing
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Expired - Fee Related
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CN 03223803
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Chinese (zh)
Inventor
马晓茜
彭思众
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South China University of Technology SCUT
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South China University of Technology SCUT
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Priority to CN 03223803 priority Critical patent/CN2606262Y/en
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Publication of CN2606262Y publication Critical patent/CN2606262Y/en
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Expired - Fee Related legal-status Critical Current

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Abstract

The utility model provides a low-pollution refuse burning system, comprising a rotary kiln (2), a secondary combustion chamber (7), a high temperature air combustion device and an ash melting treatment device (1), wherein, one end of the rotary kiln (2) is connected with the secondary combustion chamber (7), while the other end is connected with the ash melting treatment device (1); the high temperature air combustion device is connected respectively with the rotary kiln (2) and the secondary combustion chamber (7). The low-pollution refuse burning system adopts an air inlet sectionalizing rotary kiln as a primary combustion chamber and heats air by using the waste hot of flue gas so as to make the system achieve the best combustion efficiency and reduce the amount of auxiliary fuel; meanwhile, improves combustion temperature and reduces the discharge of dioxin, furan and other pollutants in flue gas; additionally, applies melting treatment on slag and fly ash, and effectively controls the discharge of dioxin, furan and other pollutants. Therefore, the utility model has the advantages of high treatment efficiency and good environmental protection effect, can be widely applied to city domestic refuse treatment, and is broad in application prospect.

Description

A kind of low pollution rubbish CIU
Technical field
The utility model relates to technology of garbage disposal, particularly a kind of low pollution rubbish CIU.
Background technology
Municipal refuse is stacked, and following tangible harm is arranged: polluted source, and polluted agricultural land, soil, atmosphere pollution, what become mosquitos and flies, mouse, pathogen grows source, appropriation of land etc.Usually contain in the domestic waste: paper, cloth, plastics, rubber, kitchen are surplus, vegetation, brick and tile, sandy soil, metal, glass etc.But each components contents is with the difference of the habits and customs of each department, the level of economic development, climate condition etc. and different.In developed country, the output of domestic waste is big, and wherein organic matters such as food waste, paper, cloth, plastics account for very big proportion, and combustible content is very high, and calorific value is also very high.The content of inorganic matter is higher relatively on China's general garbage, but in recent years, along with growth in the living standard, and the popularizing of town gas, the organic principle in the rubbish is also increasing gradually, and unit weight reduces, calorific value increases.Simultaneously, the output of rubbish also increases year by year.These characteristics of rubbish show both at home and abroad: traditional landfill and compost treatment can not meet the needs of, because these two kinds of methods subtract appearance, decrement weak effect, and burn rule because its advantage has obtained developing rapidly.
The type of furnace of abroad developing that is suitable for solid waste incineration mainly contains: Martin furnace (MartinFurnace), two sections stoves (two-stage furnace), two-cell heater (two-chamber furnace), rotary kiln (rotary kiln), fluid bed (fluidized bed), garbage derivatived fuel (refuse derived fuel), control oxygen making amount burning (controlled air oxidation), direct current electric arc furnace (direct-current arc melter), plasma incinerator (thermal plasma arc vitrification) and high temperature or low temperature pyrolyzer (high/lowtemperature decomposition) etc.Being compared as follows of the several frequently seen waste incineration type of furnace:
(1) stoker fired grate formula: be mainly used in Europe, the U.S., Japan, disposal ability is more than 200t/d, and design, manufacturing and operating maintenance technology are ripe, the fragmentation of not classifying except that Bulky Waste.Its advantage is: be suitable for big capacity, public hazards are easily handled, and burning is reliable; Shortcoming is: the cost height, operation, maintenance cost height should turn round continuously, operation running specification requirement height.
(2) module type: be mainly used in the U.S., Japan, disposal ability is below 200t/d, and design, manufacturing and operating maintenance technology are ripe, can't handle Bulky Waste.Its advantage is: be suitable for low capacity, simple structure, install removable, mobility is big; Shortcoming is: incomplete combustion, and efficiency of combustion is low, and service life is short, and average construction cost is higher.
(3) rotary kiln type: be mainly used in the U.S., Denmark, disposal ability is more than 200t/d, and supplier is limited, the fragmentation of need not classifying except that Bulky Waste.Its advantage is: rubbish stir and drying property good, applicable in, big capacity, but high-temp combustion, residual ash particle is little.Shortcoming is: connect the transmission device complexity, the refractory material in the stove is fragile.
(4) fluidized bed type: be mainly used in Japan, disposal ability is below 150t/d, and supplier is limited, needs classification to be crushed to below the 5cm.Its advantage is: capacity in being suitable for, and ignition temperature is lower, and heat conductivity is good, and public hazards are low, and efficiency of combustion is preferable.Shortcoming is: operation running technology height, and the kind of fuel is restricted, and needs to add circulating medium, and feed particles is less, processed in units amount required drive height, the easy erosion of siege material damages.
People recognize gradually in practice, and directly burning disposal has following weak point:
(1) refuse moisture height is difficult to stablize, completing combustion;
(2) discharging chlorinated diphenyl Bing Er Evil pharynx and chlorinated diphenyl and furans;
(3) technology of domestic manufacturing fire grate is immature, import fire grate costliness;
(4) waste heat boiler equipment high temperature corrosion.
Therefore, smooth combustion under the oily condition of oil or few throwing, completing combustion can not thrown; Can control corrosion effectively with the generation of pollutants such as Er Evil pharynx, furans; Can reduce investment and operating cost, become the key of garbage incineration technology development.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming and the deficiency of prior art, a kind of efficiency of combustion that improves effectively is provided, reduce the consumption of auxiliary fuel, reduce the discharging of pollutants such as flue gas Zhong Er Evil pharynx, furans, reduce the low pollution rubbish CIU of environmental pollution.
The purpose of this utility model is achieved through the following technical solutions: this low pollution rubbish CIU comprises rotary kiln, dual firing chamber, typed high temperature air burning device, ash melting treating apparatus, rotary kiln one end is connected with dual firing chamber, the other end is connected with the ash melting treating apparatus, and typed high temperature air burning device is connected with dual firing chamber with rotary kiln respectively.
Described rotary kiln is divided into four sections, and each intersegmental employing stainless steel running roller connects and sealing.Wherein, first and third section shorter, and feed zone and wind inlet section for fixing are used for charging and air feed; The second, four sections is rotational segment, is driven by gear or running roller, and gear or running roller are then by driven by motor, and motor speed is stepless adjustable, is controlled at 3~5 rev/mins during actual motion.Rotary kiln body of heater inclination angle is 2 °, and the rotary kiln end connects typed high temperature air burning device, and the wind inlet section at middle part connects air blast and carries out air feed, and air blast is by driven by motor, and motor can carry out speed governing as required, gives air quantity thereby regulate.
At present, existing rotary kiln adopts end air-supply to burn, and is that following current is arranged mostly, makes rotary kiln temperature on the low side, combustion instability; In the technical program, because rubbish is in heating, drying stage in earlier stage in the rotary kiln, required air quantity is little, but need higher gas temperature, so that rapid heat drying, so in a combustion chamber, air, flow of flue gas are opposite with the solid direction of advance, adopt counter-flow arrangement; Because intermediate reaction is stronger, thus other air distribution, supplemental oxygen; The rotary kiln of this grade separation wind can overcome the weak point of traditional rotary kiln air distribution and tissue one combustion combustion conditions aspect, chamber, optimize wind pushing temperature and air output according to the combustion characteristics in the rotary kiln, help improving rotary kiln temperature and distribute and the waste incineration condition, rubbish is stable, the effect of completing combustion thereby reach.
The gas approach of described dual firing chamber and the housing of dual firing chamber are tangent; That is, organize the swirl flow combustion operating mode in dual firing chamber in dual firing chamber's employing tangential admission mode.
In existing pyrolysis, the gasification furnace, as control the dual firing chamber of the CAO system of oxygen making amount burning, all be to adopt axially or radial air inlet, acylic motion flows in the dual firing chamber, makes the air feed of dual firing chamber mix bad with combustible gas, and existence burning dead angle and part low-temperature space, be unfavorable for burning, the time of staying of combustible in dual firing chamber while is not enough, if strengthen dual firing chamber's length, make that then body of heater is huge, investment increases; Dual firing chamber adopts the tangential admission mode in the technical program, organize the swirl flow combustion operating mode in dual firing chamber, strengthen stirring in the stove, mixing, prolong the time of staying of combustible in stove, the combustible component of flue gas is fully burned, and helps the decomposition of pollutants such as Er Evil pharynx, furans.
Described typed high temperature air burning device comprises air preheater and waste heat boiler, and waste heat boiler is connected with dual firing chamber by air preheater.
Existing garbage incineration equipment all is to adopt the arrangement of " incinerator-waste heat boiler-air preheater ", or use the steam preheating air, air preheating temperature is low, the not even preheated air that has, and msw water content is higher, and this easily causes, and furnace temperature is low, the phenomenon of the difficulty of catching fire, combustion instability, incomplete combustion; Ignition temperature is lower in addition, and the trace organic substance Er Evil pharynx of generation, furans etc. can't decompose, and enter atmosphere by flue gas, forms secondary pollution.Adopt the arrangement of " incinerator-air preheater-waste heat boiler " in the technical program, make the fume afterheat of burning away the refuse and producing, at first add hot-air, can improve the temperature of air feed so greatly; Then, burn away the refuse, improve reaction temperature, reduce the auxiliary fuel consumption, reduce the discharging of pollutants such as flue gas Zhong Er Evil pharynx, furans with high temperature air.
Described ash melting treating apparatus comprises housing, ash bucket, oil burner, exhaust opening, cinder notch, and ash bucket and oil burner pass the housing upper surface and fixedly connected with housing, and exhaust opening is positioned at housing upper surface one side, and cinder notch is positioned at housing bottom one side.The principle of this ash melting treating apparatus is: lime-ash and flying dust spray into fuel oil lime-ash and flying dust are carried out melt process in falling into burner hearth in the housing from ash bucket from oil burner, the flue gas after the processing is discharged from exhaust opening, and waste residue is discharged from cinder notch.
More existing incinerators, comprise Martin furnace, fluid bed, CAO, rotary kiln etc., can the ablation amount often be higher than 5% in the lime-ash, this explanation burning is abundant inadequately, the utilizability of slag is also very low, trace organic substance Er Evil pharynx in lime-ash and the flying dust, furans etc. are not effectively controlled yet in addition, and directly row is to soil, water source and atmosphere, and secondary pollution is more serious.Adopt the ash melting treating apparatus of high temperature to handle lime-ash and flying dust in the technical program, lime-ash and flying dust are carried out melt process, eliminate the discharging of pollutants such as De Er Evil pharynx in lime-ash, the flying dust, furans; Simultaneously, the lime-ash after the fusion can be used as building and road construction material.
The utility model has following advantage and effect with respect to prior art: this low pollution rubbish CIU adopts segmentation to advance the rotary kiln of air as a combustion chamber, utilize fume afterheat to add hot-air, thereby make this system reach best efficiency of combustion, and reduce the consumption of auxiliary fuel; Simultaneously, improve ignition temperature, reduce the discharging of pollutants such as flue gas Zhong Er Evil pharynx, furans; In addition, lime-ash, flying dust are carried out melt process, control the discharging of pollutants such as lime-ash, flying dust Er Evil pharynx, furans effectively; Thereby have treatment effeciency height, advantage that environment protecting is good, and can be used in the processing domestic waste widely, application prospect is wider.
Description of drawings
Fig. 1 is the system flow chart of the utility model low pollution rubbish CIU.
Fig. 2 is the structural representation of rotary kiln in the low pollution rubbish CIU shown in Figure 1.
Fig. 3 is the structural representation of dual firing chamber in the low pollution rubbish CIU shown in Figure 1.
Fig. 4 is the structural representation of air preheater in the low pollution rubbish CIU shown in Figure 1.
Fig. 5 is ash melting treating apparatus figure in the low pollution rubbish CIU shown in Figure 1
The specific embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.
Embodiment
Fig. 1~Fig. 5 shows concrete structure of the present utility model, as seen from Figure 1, this refuse burning system comprises rotary kiln (a combustion chamber) 2, dual firing chamber 7, air preheater 8, waste heat boiler 9, ash melting treating apparatus 1, rotary kiln 2 one ends are connected with dual firing chamber 7, the other end is connected with ash melting treating apparatus 1, waste heat boiler 9 is connected with dual firing chamber 7 by air preheater 8, and air preheater 8 is connected with rotary kiln 2 one ends simultaneously.In addition, among Fig. 13 be air blast, 4 for feeding mechanism, 5 for refuse hopper, 6 for fuel nozzle, 10 for chimney.
The structure of described rotary kiln 2 is divided into four sections as shown in Figure 2, and each intersegmental employing stainless steel running roller connects and seals with seal closure; Wherein, first and third section shorter, and feed zone 2-1 and wind inlet section 2-3 for fixing are used for charging and air feed; The second, four sections 2-2,2-4 are rotational segment, are driven by gear or running roller, and gear or running roller are then by driven by motor, and motor speed is stepless adjustable, is controlled at 3~5 rev/mins during actual motion; Rotary kiln 2 tilting furnace angles are 2 °, the air preheater 8 that rotary kiln 2 ends connect feeds high temperature air and carries out preheating, and the wind inlet section 2-3 at middle part connects air blast 3 and carries out air feed, and air blast 3 is by driven by motor, motor can carry out speed governing as required, gives air quantity thereby regulate.
The structure of described dual firing chamber 7 as shown in Figure 3, comprise housing 7-1, gas approach 7-2, exhanst gas outlet 7-3, oil-in 7-4, housing 7-1 is made up of shell 7-1A and flame retardant coating 7-1B, gas approach 7-2 is positioned at the position tangent with housing 7-1, and exhanst gas outlet 7-3 and oil-in 7-4 lay respectively at the two ends of housing 7-1.
The structure of described air preheater 8 as shown in Figure 4, housing 8-1 two ends have gas approach 8-2 and exhanst gas outlet 8-3, the side of housing 8-1 has air intlet 8-4 and air outlet slit 8-5; Being provided with heat-exchange ceramic 8-6 in the housing 8-1, is air duct in the heat exchanger tube 8-6, and heat exchanger tube 8-6 is outward an exhaust gases passes.
Described ash melting treating apparatus 1 as shown in Figure 5, comprise housing 1-1, oil burner 1-2, ash bucket 1-3, exhaust opening 1-4, cinder notch 1-5, ash bucket 1-3 and oil burner 1-2 pass housing 1-1 upper surface and fixedly connected with housing 1-1, exhaust opening 1-4 is positioned at housing 1-1 upper surface one side, and cinder notch 1-5 is positioned at housing 1-1 bottom one side.
The operation principle of this low pollution rubbish CIU is: system layout adopts the arrangement of " incinerator-air preheater-waste heat boiler ", at dual firing chamber 7 and 9 installation air preheaters 8 of waste heat boiler, the recovery section fume afterheat, making full use of high-temperature flue gas heats into the stove air, temperature reaches more than 600 ℃, improve more than a combustion chamber 2 reaction temperatures to 900 ℃, more than dual firing chamber's 2 reaction temperatures to 1000 ℃, thereby reduce the discharging of pollutants such as flue gas Zhong Er Evil pharynx, furans, make stable, the completing combustion of rubbish simultaneously, reduce the auxiliary fuel consumption.After 2 processing of a combustion chamber, unburned carbon loss q4 is below 3%; Combustible gas and flue gas from coming out in a combustion chamber 2 enter dual firing chamber 7 in the tangential mode that flows, and intake velocity maintains more than the 6m/s, to guarantee to have certain eddy flow degree; In dual firing chamber 7, feed the high temperature air more than 600 ℃, under the high temperature air environment, combustible gas can descend the smooth combustion of fighting being lower than the condition of percent volume to volume below 10%, the eddy flow operating mode then can be strengthened mixing in the stove, thereby overheavy firing, and prolong combustible in the time of staying of dual firing chamber 7, guarantee through the 7 back loss of the inadequacy burning for chemistry mechanics reason q3 of dual firing chamber below 0.2%; From the combustion lime-ash that comes out of chamber 2 and the flying dust collected from deduster or chimney bottom, enter ash melting treating apparatus 1, this chamber is a fuel with oil, more than 1500 ℃, lime-ash, flying dust are carried out melt process, eliminate pollutants such as De Er Evil pharynx, furans in lime-ash, the flying dust fully.Behind the ash melting treating apparatus, the ablation amount of lime-ash is below 0.1%.

Claims (5)

1, a kind of low pollution rubbish CIU, it is characterized in that: comprise rotary kiln (2), dual firing chamber (7), typed high temperature air burning device, ash melting treating apparatus (1), rotary kiln (2) one ends are connected with dual firing chamber (7), the other end is connected with ash melting treating apparatus (1), and typed high temperature air burning device is connected with dual firing chamber (7) with rotary kiln (2) respectively.
2, refuse burning system according to claim 1 is characterized in that: described rotary kiln (2) is divided into four sections, and each intersegmental employing stainless steel running roller connects and sealing; First and third section is fixing feed zone (2-1) and wind inlet section (2-2), and second, four section is rotational segment (2-2,2-4), is connected with gear or running roller.
3, low pollution rubbish CIU according to claim 1 is characterized in that: (7) gas approach (7-2) of described dual firing chamber is tangent with the housing (7-1) of dual firing chamber (7).
4, low pollution rubbish CIU according to claim 1 is characterized in that: described typed high temperature air burning device comprises air preheater (8) and waste heat boiler (9), and waste heat boiler (9) is connected with dual firing chamber (7) by air preheater (8).
5, low pollution rubbish CIU according to claim 1, it is characterized in that: described ash melting treating apparatus (1) comprises housing (1-1), oil burner (1-2), ash bucket (1-3), exhaust opening (1-4), cinder notch (1-5), ash bucket (1-3) and oil burner (1-2) pass housing (1-1) upper surface and fixedly connected with housing (1-1), exhaust opening (1-4) is positioned at housing (1-1) upper surface one side, and cinder notch (1-5) is positioned at housing (1-1) bottom one side.
CN 03223803 2003-02-26 2003-02-26 Low-pollution refuse burning systems Expired - Fee Related CN2606262Y (en)

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CN 03223803 CN2606262Y (en) 2003-02-26 2003-02-26 Low-pollution refuse burning systems

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CN 03223803 CN2606262Y (en) 2003-02-26 2003-02-26 Low-pollution refuse burning systems

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101055081B (en) * 2006-04-14 2010-10-27 林世平 Method for burning garbage using water coal slurry and burning system
CN104930520A (en) * 2015-06-19 2015-09-23 中能世华(北京)节能科技有限公司 Household rubbish burning waste heat utilization system
CN106594741A (en) * 2016-11-18 2017-04-26 四川九洲环保科技有限责任公司 Combustion chamber
CN106594751A (en) * 2017-01-11 2017-04-26 北京生态岛科技有限责任公司 Waste incineration system
CN106678808A (en) * 2016-11-18 2017-05-17 四川九洲环保科技有限责任公司 Incineration system
CN108592033A (en) * 2018-05-07 2018-09-28 石力峰 A kind of efficient incinerator of hazardous waste

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101055081B (en) * 2006-04-14 2010-10-27 林世平 Method for burning garbage using water coal slurry and burning system
CN104930520A (en) * 2015-06-19 2015-09-23 中能世华(北京)节能科技有限公司 Household rubbish burning waste heat utilization system
CN106594741A (en) * 2016-11-18 2017-04-26 四川九洲环保科技有限责任公司 Combustion chamber
CN106678808A (en) * 2016-11-18 2017-05-17 四川九洲环保科技有限责任公司 Incineration system
CN106678808B (en) * 2016-11-18 2018-06-15 四川九洲环保科技有限责任公司 A kind of incineration system
CN106594751A (en) * 2017-01-11 2017-04-26 北京生态岛科技有限责任公司 Waste incineration system
CN108592033A (en) * 2018-05-07 2018-09-28 石力峰 A kind of efficient incinerator of hazardous waste

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