CN105805754A - Waste pyrolysis method capable of preventing generation of dioxin - Google Patents
Waste pyrolysis method capable of preventing generation of dioxin Download PDFInfo
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- CN105805754A CN105805754A CN201410841851.9A CN201410841851A CN105805754A CN 105805754 A CN105805754 A CN 105805754A CN 201410841851 A CN201410841851 A CN 201410841851A CN 105805754 A CN105805754 A CN 105805754A
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- waste
- treatment
- dioxin
- english
- hot air
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000000197 pyrolysis Methods 0.000 title claims abstract description 28
- 239000002699 waste material Substances 0.000 title abstract description 11
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 title abstract 6
- 239000007789 gas Substances 0.000 claims abstract description 29
- 239000012071 phase Substances 0.000 claims abstract description 20
- 239000007790 solid phase Substances 0.000 claims abstract description 7
- 239000010813 municipal solid waste Substances 0.000 claims description 40
- 235000002918 Fraxinus excelsior Nutrition 0.000 claims description 8
- 239000002956 ash Substances 0.000 claims description 8
- 239000003517 fume Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 abstract description 8
- 239000002912 waste gas Substances 0.000 abstract description 4
- 239000002906 medical waste Substances 0.000 abstract description 3
- 239000000779 smoke Substances 0.000 abstract 2
- 230000007547 defect Effects 0.000 abstract 1
- 230000000185 dioxinlike effect Effects 0.000 abstract 1
- 239000010791 domestic waste Substances 0.000 abstract 1
- 238000011272 standard treatment Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 22
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 8
- 239000003546 flue gas Substances 0.000 description 8
- 238000004056 waste incineration Methods 0.000 description 8
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 4
- 229910052801 chlorine Inorganic materials 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000002194 synthesizing effect Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000009795 derivation Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000007353 oxidative pyrolysis Methods 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000003053 toxin Substances 0.000 description 1
- 231100000765 toxin Toxicity 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The invention discloses a waste pyrolysis method capable of preventing generation of dioxin. The waste pyrolysis method aims to overcome the defects that in the existing waste pyrolysis treatment process, the dioxin is likely to be generated, the treatment investment is large, the operation cost is high, and the practicability is poor. The waste pyrolysis method comprises the steps that hot air at the temperature of 250-280 DEG C is introduced into the waste for treatment for 1-3 min, and the waste gas phase and the waste solid phase free of dioxin are obtained; the waste gas phase is guided out, hot air at the temperature of 300-500 DEG C is introduced into the waste solid phase for treatment for 2-10 seconds, and ash and combustible smoke free of dioxin are obtained; and the ash is collected for harmless sealed utilization, hot air at the temperature of 500-600 DEG C is introduced into the waste gas phase and the combustible smoke for treatment for 3 seconds, pyrolytic flame gas free of dioxin is obtained, and conventional harmless standard treatment and emission are conducted after thermal energy of the pyrolytic flame gas is collected. The waste pyrolysis method is mainly used for treatment of household waste and medical waste, dioxin-like chemicals can be prevented from being generated during waste pyrolysis, the treatment cost is low, the investment is small, and the adaptability is high.
Description
Technical field
The present invention relates to a kind of waste disposal method, a kind of refuse pyrolysis method preventing two English from generating.
Background technology
Waste incineration pyrolysis is a kind of high-temperature hot chemical treatment method, and the combustible component in rubbish reacts with the oxygen in air in incinerator, is converted into high-temperature gas and solid residue.Waste incineration pyrolytic process produces substantial amounts of heat energy, volume can reduce 80%-90%, the composition structure of harmful solid waste can be destroyed, kill pathogen, reach the purpose that toxin expelling is removed the evil, there is decrement, harmless, the feature of resource, being one of widely used garbage disposal means of current developed country, plough in great shortage country in Japan etc., waste incineration pyrolysis processing ratio reaches 65%-80%.But conventional garbage burns pyrolysis processing and has the following disadvantages:
One is that conventional garbage burning pyrolytic process to generate substantial amounts of two English, pollutes environment, and big to the two English intractabilities generated, and processing cost is high.Although in recent years two English class material researchs and understanding being deepened continuously, controlled by incinerator " 3T " technically and strict incineration flue gas technique, can make the emission control of two English class materials under strict standard, but considerably increasing one-time investment and operating cost, there is secondary pollution in two English class materials of gas cleaning removing.
Two be conventional garbage burn pyrolysis need supplementary energy many, and waste incineration itself produce heat utilize usefulness not high enough, cause waste incineration cost height.Conventional garbage burns has higher requirement to refuse thermal value and moisture.CJ/T 118-2000 specifies, " entering the average annual moisture of stove house refuse and be not preferably greater than 50%, average annual content of ashes is not preferably greater than 30%, and average annual low heat valve is not preferably less than 4.18MJ/kg ".For ensureing stable burning, " domestic refuse treatment project technical regulation " clear stipulaties, " incinerator answers collocation point ignition combustor and auxiliary burner ", need to expend substantial amounts of auxiliary fuel.
Three is that the one-time investment that incineration plant is built is huge, and the project construction occupied fund cycle is long.Building mark 142-2009 regulation, " newly-built grate furnace incineration plant main equipment and the system investment estimate based on import can be by not higher than 500,000 yuan/(t/d) controls；The investment estimate that grate furnace incineration plant main equipment all domesticizes can be by not higher than 400,000 yuan/(t/d) control；The indices for investment estimate of newly-built fluid bed furnace incineration plant can be by not higher than 350,000 yuan/(t/d) control ".The investment capacity not having advanced economy basic and powerful is difficult to build up.
Conventional garbage burns the deficiency of pyrolytic technique, significantly limit the waste incineration pyrolysis popularization and application in China, especially in the application of small and medium-sized cities.
Although some domestic entity and individual are devoted to the research of waste incineration pyrolytic technique always, try hard to overcome the deficiency of conventional garbage incineration technology.Such as document CN201410085904.9, discloses on the basis of conventional garbage electricity generation system, has added pretreatment system, flue gas treating system, and percolation liquid treating system, to reduce the generation of two English presomas；Document CN201320090207.3, discloses use oxygen-enriched combusting equipment and secondary air system, to ensure incinerator waste gas burning temperature to greatest extent, makes the flow-disturbing of beneficially secondary combustion chamber, extends in the secondary combustion chamber time of staying, to decompose two English.But these technology one-time investments are big, operating cost is high, and effect is undesirable, and practicality is the strongest.
Summary of the invention
The purpose of the present invention is aiming at above-mentioned deficiency, a kind of refuse pyrolysis method preventing two English from generating is provided, it is prevented from the generation of two English class materials, and can prevent two English from again synthesizing when flue gas cool-down, the generation of two English class materials can be prevented from source, and energy-conservation, and processing cost is low, small investment, strong adaptability.
For reaching above-mentioned purpose, the technical scheme is that, this refuse pyrolysis method preventing two English from generating is:
A. rubbish is passed through the hot air treatment 13 minutes of 250 280 DEG C, obtains without the rubbish gas phase of two English, rubbish solid phase；
B. described rubbish gas phase is derived, solid garbage is passed through mutually 300 500 DEG C of hot air treatment 2 10 seconds, obtain ashes, the combustible fumes of nothing two English；
C. collecting the harmless sealing of ashes to utilize, described rubbish gas phase, combustible fumes are passed through 500 600 DEG C of hot air treatment 35 seconds, obtain the pyrolysis flame gas of nothing two English, after collecting the heat energy of pyrolysis flame gas, conventional harmless up to standard process is discharged.
Compared with the prior art, rubbish is first passed through the hot air treatment 13 minutes of 250 280 DEG C by the present invention, carry out rubbish preheating, be dried, be pyrolyzed, Organic substance and the chlorine element of two English class materials will be generated, gas phase (combustible organic) is generated by pyrolysis at a temperature of 250 280 DEG C, separate from rubbish and derive, do not allow Organic substance and chlorine element stop at 300 DEG C of-500 DEG C of temperature sections the most easily generating two English class materials；And solid garbage is passed through mutually 300 500 DEG C of hot air treatment 2 10 minutes, the rubbish gas phase (combustible organic) of obtained combustible fumes Yu aforementioned generation is passed through 500 600 DEG C of hot air treatment 3 seconds, the exhaustive oxidations such as the gas phase combustible organic of two English class materials, flue gas will be synthesized, prevent two English class materials from again synthesizing when flue gas cool-down.From source, thus prevent the generation of two English class materials rather than rely on gas cleaning to make two English class material qualified discharges.
Rubbish substep classification is passed through hot-air and processes by the present invention, has both controlled the generation of two English class materials, has reduced again traditional refuse pyrolysis temperature, makes technique, equipment requirements reduce, simplifies, is derived from saving energy and reduce the cost, increases the benefit.
The present invention will generate Organic substance and the chlorine element of two English class materials, temperature below 300 DEG C is pyrolyzed into gas phase combustible organic and separates derivation, rubbish solid phase is passed through again 300 500 DEG C of hot air treatment, then by the combustible fumes of gained together with the rubbish gas phase (combustible organic) of derivation, process with 500 600 DEG C of hot-air mixed pyrolysis, Organic substance and chlorine element is not allowed to stop at 300 DEG C of-500 DEG C of temperature sections the most easily generating two English class materials, the gas phase combustible organic exhaustive oxidation of two English class materials will be synthesized, prevent two English class materials from again synthesizing when flue gas cool-down.From source, thus prevent the generation of two English class materials rather than rely on gas cleaning to make two English class material qualified discharges.
Present invention is mainly used for house refuse, the harmless treatment of medical waste etc., it is prevented from the generation of two English class materials, and two English class materials can be stoped again to synthesize when flue gas cool-down, the generation of two English class materials is prevented from source, it processes rubbish and is not required to sorting and crushes, water content is not more than 60%, the low heat valve rubbish not less than 2.51 MJ/kg all can directly process, in flue gas, the original discharge concentration of two English class materials can reach the standard that GB 18458-2014 specifies, newly-built waste incineration pyrolysis factory make an investment in 200,000 yuan/(t/d) within, qualified discharge and harmless treatment low cost, small investment, strong adaptability.
Detailed description of the invention
Embodiment 1
As a example by processing house refuse, medical waste, the refuse pyrolysis method that the present invention prevents two English from generating is:
A. rubbish is passed through the hot-air stir process 13 minutes of 250 280 DEG C, obtains without the rubbish gas phase of two English, rubbish solid phase；
B. described rubbish gas phase is derived, solid garbage is passed through mutually 300 500 DEG C of hot air treatment 2 10 seconds, obtain ashes, the combustible fumes of nothing two English；
C. collecting the harmless sealing of ashes to utilize, described rubbish gas phase, combustible fumes are passed through 500 600 DEG C of hot air treatment 35 seconds, obtain the pyrolysis flame gas of nothing two English, after collecting the heat energy of pyrolysis flame gas, conventional harmless up to standard process is discharged.
Ashes can make building prefabrication block with cement mixing, carries out the harmless utilization of sealing.
Another kind of easy enforcement, rubbish is preheated with the hot-airs of less than 300 DEG C, be dried, be pyrolyzed 13 minutes, the Organic substance making major part may generate two English is separated from rubbish with gas phase combustible organic, this gas phase combustible organic is derived the hot-air mixed combustion directly with 600 DEG C, oxidative pyrolysis 35 seconds, make Organic substance fully and completely be aoxidized, so can eliminate the generation of two English.Remaining rubbish solid phase can conventional treatment separately.
Claims (1)
1. the refuse pyrolysis method preventing two English from generating, is characterized in that:
A. rubbish is passed through the hot air treatment 13 minutes of 250 280 DEG C, obtains without the rubbish gas phase of two English, rubbish solid phase；
B. described rubbish gas phase is derived, solid garbage is passed through mutually 300 500 DEG C of hot air treatment 2 10 seconds, obtain ashes, the combustible fumes of nothing two English；
C. collecting the harmless sealing of ashes to utilize, described rubbish gas phase, combustible fumes are passed through 500 600 DEG C of hot air treatment 35 seconds, obtain the pyrolysis flame gas of nothing two English, after collecting the heat energy of pyrolysis flame gas, conventional harmless up to standard process is discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410841851.9A CN105805754B (en) | 2014-12-30 | 2014-12-30 | The refuse pyrolysis method for preventing dioxin from generating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410841851.9A CN105805754B (en) | 2014-12-30 | 2014-12-30 | The refuse pyrolysis method for preventing dioxin from generating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105805754A true CN105805754A (en) | 2016-07-27 |
| CN105805754B CN105805754B (en) | 2019-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410841851.9A Expired - Fee Related CN105805754B (en) | 2014-12-30 | 2014-12-30 | The refuse pyrolysis method for preventing dioxin from generating |
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| Country | Link |
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| CN (1) | CN105805754B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1514166A (en) * | 2003-01-30 | 2004-07-21 | 天津大学 | Method of making city garbage as solid fuel and its application |
| CN2795672Y (en) * | 2005-03-30 | 2006-07-12 | 吴桐 | Three burning type burning processing system for liquid and solid waste materials |
| EP2009353A1 (en) * | 2007-06-28 | 2008-12-31 | Ifp | Method of preparing a mixed load containing biomass and a heavy hydrocarbon fraction with a view to subsequent gasification |
| CN101463256A (en) * | 2009-01-11 | 2009-06-24 | 朝阳森塬活性炭有限公司 | Method and special equipment for recycling to produce fuel |
| KR20090121814A (en) * | 2008-05-23 | 2009-11-26 | 최장주 | Dry distillation type incinerator for rpf & rdf |
| CN102839023A (en) * | 2012-07-30 | 2012-12-26 | 华中科技大学 | Low temperature pyrolysis-high temperature gasification coupling disposal method for municipal solid waste |
| CN103900090A (en) * | 2014-03-10 | 2014-07-02 | 深圳市宇力科技有限公司 | Environment-friendly device matched with efficient and pollution-free refuse incineration power generation and using technology thereof |
-
2014
- 2014-12-30 CN CN201410841851.9A patent/CN105805754B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1514166A (en) * | 2003-01-30 | 2004-07-21 | 天津大学 | Method of making city garbage as solid fuel and its application |
| CN2795672Y (en) * | 2005-03-30 | 2006-07-12 | 吴桐 | Three burning type burning processing system for liquid and solid waste materials |
| EP2009353A1 (en) * | 2007-06-28 | 2008-12-31 | Ifp | Method of preparing a mixed load containing biomass and a heavy hydrocarbon fraction with a view to subsequent gasification |
| KR20090121814A (en) * | 2008-05-23 | 2009-11-26 | 최장주 | Dry distillation type incinerator for rpf & rdf |
| CN101463256A (en) * | 2009-01-11 | 2009-06-24 | 朝阳森塬活性炭有限公司 | Method and special equipment for recycling to produce fuel |
| CN102839023A (en) * | 2012-07-30 | 2012-12-26 | 华中科技大学 | Low temperature pyrolysis-high temperature gasification coupling disposal method for municipal solid waste |
| CN103900090A (en) * | 2014-03-10 | 2014-07-02 | 深圳市宇力科技有限公司 | Environment-friendly device matched with efficient and pollution-free refuse incineration power generation and using technology thereof |
Non-Patent Citations (1)
| Title |
|---|
| 解强: "《城市固体废气物能源化利用技术》", 30 May 2004 * |
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| CN105805754B (en) | 2019-03-12 |
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Effective date of registration: 20201214 Address after: No.62, shengjishan, Jiaotang village, Danan Town, Guangfeng District, Shangrao City, Jiangxi Province Patentee after: Zhou Xiaohua Address before: 2nd floor, Yinxin garden, Lufeng Town, Xupu County, Huaihua City, Hunan Province Patentee before: HUNAN JINWEI ENVIRONMENTAL PROTECTION EQUIPMENT Co.,Ltd. |
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Granted publication date: 20190312 |