CN1246632C - Pollutionless garbage burning method of heat carrying circulation tunnel kiln - Google Patents

Pollutionless garbage burning method of heat carrying circulation tunnel kiln Download PDF

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CN1246632C
CN1246632C CN 02117821 CN02117821A CN1246632C CN 1246632 C CN1246632 C CN 1246632C CN 02117821 CN02117821 CN 02117821 CN 02117821 A CN02117821 A CN 02117821A CN 1246632 C CN1246632 C CN 1246632C
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tunnel cave
thermal cycle
waste
boiling
rubbish
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CN1459585A (en
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欧书信
胡晓农
舒梅男
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欧书信
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/12Heat utilisation in combustion or incineration of waste

Abstract

The present invention discloses a method which can thoroughly burn urban domestic garbage with high water content and low heat value, and does not generate secondary pollution, which relates to the technical field of garbage burning, utilization of the three wastes, and environmental-protective energy resource. Crushed garbage is dried and pyrolyzed in a converter, and then enters a boiling burning furnace to be burned; the smoke gas of the burning furnace is introduced into a heat circulation tunnel kiln; harmful substances in the smoke gas are calcined at a temperature of 1050 temperature and are burned again for 5 seconds in the heat circulation tunnel kiln, wherein the afterburning time is larger than the 2 seconds of the afterburning time at home and abroad; then, the smoke gas is dried for humidity removal by the heat circulation tunnel kiln, and is adsorbed by green bricks to be sufficiently purified. After matched with coal gangue, slag is calcined by the heat circulation tunnel kiln for making bricks; during the process of burning the garbage, the secondary pollution is not generated and energy sources, such as, electric power, fuel, etc. are not needed.

Description

The waste incineration method of band thermal cycle tunnel cave
(1) technical field
The present invention a kind ofly can thoroughly burn high moisture content, low heat value domestic waste but not produce the method for secondary pollution.Relate to waste incineration, the utilization of three wastes and eco-friendly power source technical field.
(2) background technology
Existing urban domestic garbage incinerator is to grow up on the basis that is the boiler of fuel and Industrial Stoves mostly with the coal, and these incinerators can burn the coal of high heating value, but are difficult to burn high moisture content, low-calorie domestic waste.Both at home and abroad when reality is burned high moisture content, low heat value domestic waste, or before burning to rubbish carry out sorting, from drop, heap ferment, stirring, or in incinerator, add fuel to improve the combustibility of rubbish, at present calorific value is lower than 800kcal/kg, moisture content is higher than 50% moist rubbish does not also have good incinerating method, the insufficient dense smoke that causes effluxing of incineration firing is being carried a large amount of severe toxicity and harmful substance secretly, has seriously polluted environment.
Be subjected to the restriction of rubbish present situation, technical capability and economic condition three big factors, China operating burning city domestic garbage factory quantity is few, basically adhere to following two kinds of situations separately: a kind of is the incineration plant that adopts domestic technique, and waste incineration is generally not thorough, and secondary pollution is serious; Another kind of then for introducing the external equipment or the incineration plant of technology, Shenzhen City Municipal Administration ﹠ Environmental Sanitation Integral Treat is the incineration plant of domestic first introduction type, incinerator is by Mitsubishi production, the Yuan Hongwei of this factory and Lin Wenfeng are pointed out in " analyse for a short time on the road of incinerator production domesticization " literary composition: " ... compare with external rubbish; the domestic waste of China has low heat value, high-moisture, not thin-graded characteristic; handle such rubbish well; the burning process that does not have a cover to be fit to; depend alone and introduce external equipment, we think not enough.For example in the waste of low heating value burning process of our factory, factory's crude waste stirs in garbage pool to advancing in requirement, subregion heap ferment, from sequence of operations such as drop, drainings, make that into the stove refuse thermal value can be maintained at about 1100~1400kcal/kg substantially, thereby guaranteed the stability of waste incineration, contain HCI, NOX, heavy metal, bioxin harmful components in the flue gas that incineration firing produces, can pollute environment.The flue gas processing method of our factory is that electrostatic precipitator adds the dry type lime method at present, promptly sprays into Ca (OH) in flue gas 2Powder removes compositions such as HCI, and the efficient of this method is not high, is 50%~60%, and the lime consumption is big, utilization rate is low (about 15%), can increase operating cost ... "
External high investment, expensive burning high heating value rubbish have formed a pattern and have duplicated in the whole world, Peitou under China Taipei, Taiwan Environmental Protection Agency is incinerated factory's bid and is introduced HIT's equipment, gross investment is 2.45 hundred million dollars, the ton handling of rubbish is 21.9 dollars of (data source: " the Taiwan burning city domestic garbage is handled present situation " author Zheng Minghui, Ecological Environment Research Center, Chinese Academy of Sciences, Beijing 100085).And Taiwan is similarly incinerated factory man is arranged more than 20, and ground such as Shenzhen, Ningbo, Shanghai are also successively being attempted.
The incineration of garbage rate on ground such as Japan, Taiwan surpasses 70%; domestic refuse thermal value hangs down the big sorting difficult labour of moisture content High variation amount the first in the world; the harmless treatment rate of rubbish is less than 10%; environmental protection pressure is big; this reality is difficult to change at short notice, and rubbish present situation and economic strength have determined external " three height " pattern to be difficult to become the developing direction of China's waste incineration.External carry out strict environmental protection standard, the innoxious emphasis that has become waste incineration is worthy of our study and uses for reference.Technically, the external terminal pollution control formula of curing the disease, cure the symptoms, not the disease, there is no technical advantage aspect the waste of low heating value burning, with we on same starting line, in the rubbish present situation, in the tight encirclement of economy and technology three big restraining factors, develop and waste of low heating value thoroughly burned and do not produce secondary pollution and become key problem in technology, can not keep normal combustion with present method, in a single day the calorific value only wet refuse of hundreds of kcal/kg becomes a kind of clean fuel, and all just are readily solved: the occupation of land of saving incineration plant, save equipment investment, save disposal cost, obtain maximum heat energy, slag obtains utilizing.
(3) summary of the invention
The purpose of this invention is to provide and a kind ofly can thoroughly burn high moisture content, low heat value domestic waste but do not produce any three wastes secondary pollution, do not need outsourcing fuel and electric energy, byproduct commercial exploitation of many uses to be worth height, no expensive environmental protection facility, cost is low, operating cost can be paid also with the income of production marketing and can gain, environmental protection is reached advanced world standards method.
The object of the present invention is achieved like this: low heat value, the primary domestic waste of high moisture content is sent into the converter drying pyrolysis after directly being crushed to 5~20MM, the moisture content of rubbish can be reduced to 3% by 80%, converter tilts to install, feed end is in a high position, discharge end inserts the Boiling Combustion chamber of boiling incinerator at low level, the rotating speed of regulating converter can make the rubbish of different water cut rate obtain identical drying effect, during converter work, the dihedral double wedge of converter inwall is used for stirring, disperse and propelling rubbish, quality is bigger, the higher rubbish of burning-point and hardness carries out frictional cleaning to the furnace wall, with the protection walls coking.Rubbish rolls forward in stove and finally falls in the boiling incinerator, the thermal source of oven dry draws the part from the high-temp waste gas of the incinerator that seethes with excitement, and temperature is that 600~800 ℃ waste gas enters converter, enters the thermal cycle tunnel cave behind the oven dry rubbish, waste heat obtains utilizing, and nuisance is purified; The high-temp waste gas that the boiling incinerator is discharged, some is gone into converter drying rubbish, all the other directly enter the thermal cycle tunnel cave, 950~1050 ℃ 5 seconds of high-temperature roasting band resume combustion in kiln, decomposed fully considerably beyond domestic and international consistent 2 seconds bioxin thinking, under 1050 ℃ high-temperature oxydation condition, nuisance in the flue gas is thoroughly decomposed, burning, remaining a spot of light-weight metal oxide flying dust is along with the high temperature drying band of flue gas through the thermal cycle tunnel cave, the middle temperature is dried band, adsorbed during low-temperature prewarming humidity discharging band by adobe, be cured to metal in the brick and do not have a radioactivity environmental sound, the Hci.SO in the flue gas 2.NOx wait the alkalescence of (about 5%) in sour gas and the adobe and amphoteric oxide generation neutralization reaction and be removed, gas totally discharges.
Multiple not connected hollow interlayer is arranged at the top of thermal cycle tunnel cave, negotiable clean hot gas, flue gas and steam in the interlayer, the boiling incinerator is seated in the kiln top of thermal cycle tunnel cave, the required combustion-supporting hot-air of boiling incinerator is blasted by blower fan, combustion-supporting hot-air is preheated to 800 ℃ during through the kiln top interlayer of thermal cycle tunnel cave, the temperature of boiling incinerator when burning away the refuse is 850~950 ℃, and the long-term furnace temperature during no rubbish is 800 ℃.
The thermal cycle tunnel cave is divided into 5 to 11 bands, play humidity discharging, preheating, drying, roasting, insulation and cooling effect respectively, every band is provided with 2 to 20 pairs of suction inlets or spouts respectively, at high temperature subregion band 4 to 30 at hot-air supply lock is set, 2 to 8 pairs at high-temperature gas mixture stream discharging lock, low temperature subregion band is provided with 2 to 8 pairs at cooling door, builds wide 0.6~2 meter inspection passage at the bottom of the kiln, leaves 2~10 expansion slits between high temperature and the middle temperate zone.Characteristic at the random variation of rubbish, have kiln top interlayer and the outside smoke pipe of 6 typhoon machines by the thermal cycle tunnel cave, carry out the supply and the allotment of clean gas and flue gas between the stove, the thermal cycle tunnel cave is carried out low temperature reflux heat exchange circulation and the hot thermal cycle of high temperature reflux, concurrent heating is implemented in allotment by backflow heat exchange circulation and flue gas, heat extraction, cooling, oxygenation and cut oxygen, realized effectively at Various Seasonal and weather, the normal operation of thermal cycle tunnel cave under the different garbage fuel conditions, thus Whole Process Control guaranteed to rubbish boiling incinerator and converter.
The slag that rubbish stays after boiling is burned is allocated gangue into; through fragmentation; send into thermal cycle tunnel cave roasting burnt brick after the moulding; the calorific value of gangue is 600~1200kcal/kg; average is less than 20% of bituminous coal; the domestic gangue that takes up an area of stacking of being abandoned has reached billions of tons; slag blending brickmaking after gangue and the waste incineration; the industrial policy that meets country; ground such as capital fringe are for protecting the fields the forbidding clay-brickmaking; the comprehensive utilization of gangue is subjected to government encourage and can enjoys policy favour; making coal gangue brick does not need fuel without clay; can also dissolve slag after the waste incineration; handle annual 100000000 of bricks, the considerable benefit of producing of incineration plant of 1000 tons of house refuses one day.
Rubbish thermal discharge when thoroughly burning is big, the temperature of thermal cycle tunnel cave insulation belt is 600~1050 ℃, the temperature of boiling incinerator is 800~950 ℃, at these high-temperature region filled with water cold wall pipe and superheater tube, produces the electricity consumption needs that incineration plant is satisfied in the superheated vapor generating.
The present invention compares with existing garbage incineration method both domestic and external, and following advantage is arranged:
1, the present invention is a motivated system, converter, boiling incinerator and thermal cycle tunnel cave are three elements of system, related and interaction between the three, the characteristics of this system's maximum are that adaptability is strong: can adapt to the variation of rubbish kind, calorific value, moisture content variation and season and weather, the adobe raw material is except gangue, other contain useless admittedly can the substituting of industry of a small amount of calorific value, and the slag of the coal slime distribution factory of flyash, coal washery all is good selections; The thermal cycle tunnel cave is operation continuously throughout the year, and boiling incinerator and converter have just work of rubbish, and no rubbish just stops, and is not burned quantitative limitation.
2, the present invention meets the requirement of garbage disposal minimizing, and the utilization of slag is held subtracting of factory's rubbish into to reach 100%, and solid the giving up of industry such as rubbish and gangue subtracts appearance simultaneously.
3, the present invention meets the innoxious requirement of garbage disposal, do not need environmental protection equipment, adopt the source of effecting a permanent cure to control but not passive end treatment to the control of secondary pollution, waste gas is purified in the production technology of incineration plant, waste water and dregs brickmaking, cleaner production, incineration plant do not have the three wastes and efflux, and environmental protection is reached advanced world standards.
4, the present invention meets the requirement of garbage disposal resource, and system energy consumption is low, does not need auxiliary fuel, slag to make building materials and sells, and electric energy self-supporting has steam to supply maybe can build supporting communal facilitys such as warm water swimming pool outward.
5, good economy performance of the present invention, the production domesticization equipment manufacturing cost is low, and the construction period is short, and operating cost is extremely low, and incineration plant has best-selling product to bring fixing income, has broken through the forbidden zone that domestic and international incineration plant all needs government subsidy.
6, precise and reliable of the present invention, by inventor design, produce and the fluidized bed furnace of debugging and thermal cycle tunnel cave stable operation two more than ten years, once overhauled in per 3 years, it is very convenient to operate.
(4) description of drawings
Fig. 1 is the system process equipment flowsheet, and Fig. 2 is device location figure, and Fig. 3 is a profile of thermal cycle tunnel cave.
(5) specific embodiment
Embodiments of the invention are refuse burning systems of a day handling 300 tons of domestic wastes, and rubbish subtracts capacity 100%, and the no three wastes efflux, and this refuse burning system is made up of converter, boiling incinerator, each one in thermal cycle tunnel cave and auxiliary facility.
Pending domestic waste, is sent in the converter 1 and is dried pyrolysis to 5-20mm through crusher in crushing, and the moisture content of rubbish reduces to 3% by 80%, and dried rubbish falls into boiling incinerator 7 subsequently and burns; 800 ℃ of high-temp waste gas that boiling incinerator 7 is discharged, a part enters thermal cycle tunnel cave 12 by way of flue gas recirculation pipe 4, converter 1,6# blower fan, remaining waste gas enters thermal cycle tunnel cave 12 via 5# blower fan, flue 5, in 1050 ℃ of oxidizing atmospheres of high-temperature roasting band of thermal cycle tunnel cave 12, burnt for 5 seconds, decomposed fully considerably beyond domestic and international consistent 2 seconds bioxin thinking, remaining a spot of lightweight flying dust and sour gas at the drying and preheating humidity discharging band of thermal cycle tunnel cave 12 by the adobe adsorption cleaning, at last by the 1# blower fan through chimney row to atmosphere.
Multiple not connected hollow interlayer 9 is arranged at the top of thermal cycle tunnel cave 12, negotiable clean hot gas, flue gas and steam in the interlayer 9, boiling incinerator 7 is located in the kiln top of thermal cycle tunnel cave 12, boiling incinerator 7 required combustion-supporting hot-airs are blasted by the 7# blower fan, combustion-supporting hot-air is preheated to 800 ℃ when passing through thermal cycle tunnel cave 12 kiln top interlayers 9, and the temperature when the boiling incinerator is burnt away the refuse is 850~950 ℃.Long-term furnace temperature during no rubbish is 800 ℃.
80 to 180 meters of thermal cycle tunnel cave 12 total lengths are built wide 0.6~2 meter inspection passage 11 at the bottom of the kiln, 2#, 3#, 4# blower fan are to the thermal cycle tunnel cave 12 heat exchange circulation that refluxes, and the foul smell of trash repository is introduced thermal cycle tunnel cave 12 by the 8# blower fan.
After the slag that boiling incinerator 7 produces is allocated bastard coal into, after fragmentation, moulding, send into thermal cycle tunnel cave 12 roasting burnt bricks, the mean calorie of gangue is 900kcal/kg, emit a large amount of heat energy when rubbish and gangue burning, for example the temperature of thermal cycle tunnel cave 12 insulation belt combustion chambers 10 is 600~1050 ℃, the temperature of Boiling Combustion stove 7 combustion chambers 3 is 800~950 ℃, and filled with water cold wall pipe and superheater tube are produced the electricity consumption needs that incineration plant is satisfied in the superheated vapor generating.

Claims (6)

  1. The waste incineration method of band thermal cycle tunnel cave
    1, a kind of waste incineration method with the thermal cycle tunnel cave, after it is characterized in that primary domestic waste is via the converter drying pyrolysis, entering the boiling incinerator burns, the thermal cycle tunnel cave purifies boiling flue gas that incinerator discharges, remaining slag is used for brickmaking, control the thorough burning that has realized high moisture content, waste of low heating value by the association between three combustion chambers, the secondary pollution that waste incineration produces is dissolved in burning.
  2. 2, method according to claim 1, it is characterized in that crude waste sorting outside stove, from drop, heap ferment, agitating procedure, after fragmentation, directly carry out the converter drying pyrolysis, the thermal source of oven dry draws the part from the high-temp waste gas of the incinerator that seethes with excitement, temperature is that 600 ℃ to 800 ℃ waste gas enters converter, enter the thermal cycle tunnel cave behind the oven dry rubbish, waste heat obtains utilizing, and nuisance is purified; The high-temp waste gas that the boiling incinerator is discharged, some is gone into converter drying rubbish, all the other directly enter the thermal cycle tunnel cave, the roasting of 950 ℃ ~ 1050 ℃ high temperature is watered and is with resume combustion bioxin in 5 second to be decomposed fully in kiln, solid particulate matter is adsorbed by adobe at the dry humidity discharging band of tunnel cave, and flue gas totally discharges.
  3. 3, method according to claim 1, multiple not connected hollow interlayer is arranged at the top that it is characterized in that the thermal cycle tunnel cave, negotiable clean hot gas, flue gas and steam in the interlayer, enter clean gas is preheating to 800 ℃ in interlayer after in the boiling incinerator, burn by the rubbish of oven dry pyrolysis.
  4. 4, method according to claim 1, it is characterized in that the discharge end of converter inserts the Boiling Combustion chamber of boiling incinerator with certain angle, the rotating speed of converter can be regulated, the boiling incinerator is located in the kiln top of thermal cycle tunnel cave high-temperature roasting band, interlayer and the outside smoke pipe of the 6 typhoon machines that have by kiln top carries out the supply and the allotment of clean gas and flue gas between the stove, and the thermal cycle tunnel cave is carried out high temperature reflux heat exchange circulation and low temperature reflux heat exchange circulation.
  5. 5, method according to claim 1, it is characterized in that in the adobe that the thermal cycle tunnel cave burns till, allocating into excess heat energy, the raw material of adobe is by the solid waste coal spoil of industry, slag after the waste incineration is formed, after the tunnel cave igniting, no longer need to add fuel, ran without interruption in continuous 365 days according to the heat energy of making in the adobe, by the rubbish that heat burns different calorific values of joining in the control adobe, and be positioned at boiling incinerator above the thermal cycle tunnel cave, when no rubbish can burn, be in high temperature always and treat the burning state, rubbish enters in the stove and just burns immediately, and can carry out repeatedly many times.
  6. 6, method according to claim 1, it is characterized in that in the insulation belt of thermal cycle tunnel cave and the incinerator that seethes with excitement, boiler tube being installed, high temperature production superheated vapor with 850 ℃ of 600 ℃ to 1050 ℃ of insulation belts and boiling incinerators is used to generate electricity and can satisfies the need for electricity of waste incineration in-plant equipment and supporting public's style facility fully.
CN 02117821 2002-05-22 2002-05-22 Pollutionless garbage burning method of heat carrying circulation tunnel kiln Active CN1246632C (en)

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CN 02117821 CN1246632C (en) 2002-05-22 2002-05-22 Pollutionless garbage burning method of heat carrying circulation tunnel kiln

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Application Number Priority Date Filing Date Title
CN 02117821 CN1246632C (en) 2002-05-22 2002-05-22 Pollutionless garbage burning method of heat carrying circulation tunnel kiln

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CN1246632C true CN1246632C (en) 2006-03-22

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1314925C (en) * 2003-06-18 2007-05-09 广州舒创有限公司 Full resource super heat energy urban refuse burning method
CN100455542C (en) * 2005-11-09 2009-01-28 骏鹰(湖南)陶瓷有限公司 System for producing ceramic tile with coal gangue and domestic garbage
CN102072491B (en) * 2010-10-30 2012-07-04 王雄鹰 Garbage incinerator device and ceramic new energy production system thereof
CN103322574B (en) * 2012-03-21 2016-03-30 四川国立能源科技有限公司 Utilize method and the treatment system thereof of tunnel kiln brick sintering production line cooperative disposal house refuse
CN107662914B (en) * 2017-10-13 2020-08-11 河北睿索固废工程技术研究院有限公司 Method and treatment system for carbonizing household garbage by using tunnel kiln

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