CN101485955B - Method for controlling discharge of dioxins in burning process using sulfurous iron ore - Google Patents
Method for controlling discharge of dioxins in burning process using sulfurous iron ore Download PDFInfo
- Publication number
- CN101485955B CN101485955B CN2009100956457A CN200910095645A CN101485955B CN 101485955 B CN101485955 B CN 101485955B CN 2009100956457 A CN2009100956457 A CN 2009100956457A CN 200910095645 A CN200910095645 A CN 200910095645A CN 101485955 B CN101485955 B CN 101485955B
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- CN
- China
- Prior art keywords
- dioxin
- incinerator
- iron ore
- flue gas
- sulfurous iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000000034 method Methods 0.000 title claims abstract description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title abstract 8
- 229910052742 iron Inorganic materials 0.000 title abstract 4
- 150000002013 dioxins Chemical class 0.000 title 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003546 flue gas Substances 0.000 claims abstract description 12
- 239000010813 municipal solid waste Substances 0.000 claims abstract description 5
- 239000002699 waste material Substances 0.000 claims abstract description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 14
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 8
- 239000010791 domestic waste Substances 0.000 claims description 3
- 239000002906 medical waste Substances 0.000 claims description 2
- 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 abstract description 33
- 230000000452 restraining effect Effects 0.000 abstract description 6
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 239000010881 fly ash Substances 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 239000002910 solid waste Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 1
- 239000003245 coal Substances 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 6
- 239000000428 dust Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 4
- DQMUQFUTDWISTM-UHFFFAOYSA-N O.[O-2].[Fe+2].[Fe+2].[O-2] Chemical compound O.[O-2].[Fe+2].[Fe+2].[O-2] DQMUQFUTDWISTM-UHFFFAOYSA-N 0.000 description 3
- 231100000770 Toxic Equivalency Factor Toxicity 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 150000002829 nitrogen Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000011020 pilot scale process Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
Abstract
The invention relates to a method for controlling pollutant discharge, and aims to provide a method for controlling dioxin discharge in flue gas by using sulfurous iron ore in the process of burning and processing solid wastes. The method comprises the following steps: throwing the sulfurous iron ore and trash to an incinerator, and controlling the added quantity, and keeping the concentration ofsulfuric dioxide in the flue gas at an outlet of the incinerator to between 200 and 400mg/Nm<3>. The dioxin restraining method has a simple process, does not need to change the incinerator and a fluegas processing system, has remarkable effect on dioxin restraining, and simultaneously can reduce the dioxin discharge in the flue gas and fly ash. The adopted sulfurous iron ore has low price and wide resources. In addition, the method has significant application value to solving the problem of the dioxin discharge in the process of burning wastes.
Description
Technical field
The present invention relates to a kind of pollutant emission control method, use the method for dioxin discharging in the troilite control flue gas in particularly a kind of incineration disposal solid waste process.
Background technology
The castoff burning process is one of main source of dioxin in the environment.About reducing the discharging of dioxin in the castoff burning process flue gas, main control technology has both at home and abroad: 1. control before the burning mainly is that discarded object is classified, and the chloride class of height and some heavy metals are sorted out; 2. stove inner control, carry out multifuel combustion by adding sulfur-bearing, nitrogen class material and discarded object, can obtain the good restraining effect, be that high temperature, long residence time, good turbulivity are controlled the operating mode of waste combustion with this following " 3T " principle simultaneously, reduces the synthetic of dioxin; 3. the discharging of dioxin is controlled in tail flue gas control by adding active carbon or SCR system for the dioxin that has generated.Charcoal absorption is the dioxin discharge control method of the extensive employing of domestic and international many incinerators at present in conjunction with sack cleaner.This method is by pulverous active carbon being spurted into the dioxin in the absorption gas phase in the flue, filter flying dust and active carbon down with sack cleaner then, thereby minimizing being by the dioxin amount of smoke stack emission.Though this method can effectively be controlled the discharging of dioxin, but there are two main defectives: the one, itself can not reduce the total amount of dioxin this method, only be the dioxin in the gas phase to be transferred in the solid phase by the suction-operated of active carbon collect then, the flying dust enrichment that is mixed with active carbon that produces the dioxin of high concentration, disposal for this flying dust does not at present have good way yet, the method of domestic main employing landfill is disposed this class flying dust, and is very big to the potential hazard of environment; The 2nd, this method need consume a large amount of active carbons, and operating cost is higher.About the preceding control of burning, because the discarded object of China is mixed collection basically, complicated component is difficult to carry out careful letter sorting, and discarded object sorts the cost height, efficient is low.
Interpolation sulphur inhibitor is proved to be and can reduces the synthetic of dioxin effectively, main application form is rubbish and coal multifuel combustion at present, the house refuse calorific value is lower but the original intention of coal multifuel combustion is China, and coal can help it to burn thoroughly, and the high sulfur content in the coal has also played the inhibitory action of dioxin.But along with the raising of economic level, the calorific value in the house refuse also improves gradually, and will not need coal as auxiliary fuel future.And for the disposable small-sized incinerator of some heats, as incinerator for medical garbage, coal burns infeasible technically and economy is bad.Can predict and following add separately that to contain high sulfur material will be that sulphur suppresses the principal mode that the dioxin skilled industry is used as inhibitor.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, provide a kind of and can effectively control dioxin generation in the burning process, the control technology that technology is simple, energy consumption is low, operating cost is low simultaneously.
For reaching above purpose, the present invention gets technology by interpolation troilite and discarded object multifuel combustion in stove and realizes: put into troilite and discarded object in the incinerator in the lump, the addition of control troilite makes the sulfur dioxide in flue gas concentration of incinerator outlet remain on 200～400mg/Nm
3
Oxidation takes place and generates sulfur dioxide and di-iron trioxide in troilite under the hot environment in incinerator, sulfur dioxide can suppress the synthetic of dioxin.And the oxidation of di-iron trioxide energy catalyzing organic, reduce the unburnt product of combustion process, reduce the generation of dioxin, di-iron trioxide can generate sulfur trioxide by the catalysis oxidizing sulfur dioxide in addition, and sulfur trioxide is than the better dioxin restraining agent of sulfur dioxide.
Described discarded object is a domestic waste, medical waste, any one discarded object such as industrial refuse.
Compared with prior art, the invention has the beneficial effects as follows:
Dioxin restraining method technology of the present invention is simple, does not need incinerator and smoke processing system are changed, and the dioxin restraining effect is obvious, can reduce the dioxin discharging in flue gas and the flying dust simultaneously.The troilite that is adopted is cheap, and wide material sources have important use for the emission problem that solves dioxin in the castoff burning process and are worth.
The specific embodiment
To describe the present invention below.
Incinerator in the present embodiment is the domestic waste pilot scale incinerator of 400kg/h.Troilite feeds in the burner hearth with screw(-type) feeder, and the control amount of feeding makes the sulfur dioxide in flue gas concentration of incinerator outlet remain on 200～400mg/Nm
3
Compare with the comparative test of not adopting troilite, the dioxin toxic equivalent concentration of flue gas has descended 95.3% in the chimney.Dioxin toxic equivalent concentration in the flying dust that sack cleaner is collected has descended 98%, only is 0.23 I-TEQ ng/g, is lower than the national standard of dioxin discharging in the present incineration of refuse flyash.
At last, it is also to be noted that what more than enumerate only is specific embodiments of the invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Claims (1)
1. a method of using bioxin discharging in the troilite control burning process comprises: troilite and rubbish are put in the incinerator in the lump, controlled the addition of troilite, make the sulfur dioxide in flue gas concentration of incinerator outlet remain on 200～400mg/Nm
3Described rubbish be domestic waste, medical waste or industrial dangerous waste wherein any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100956457A CN101485955B (en) | 2009-01-15 | 2009-01-15 | Method for controlling discharge of dioxins in burning process using sulfurous iron ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100956457A CN101485955B (en) | 2009-01-15 | 2009-01-15 | Method for controlling discharge of dioxins in burning process using sulfurous iron ore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101485955A CN101485955A (en) | 2009-07-22 |
| CN101485955B true CN101485955B (en) | 2011-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100956457A Active CN101485955B (en) | 2009-01-15 | 2009-01-15 | Method for controlling discharge of dioxins in burning process using sulfurous iron ore |
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| Country | Link |
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| CN (1) | CN101485955B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423749A (en) * | 2013-07-23 | 2013-12-04 | 浙江大学 | Method using new S-N retardant to have control over dioxin generation in waste incineration |
| CN110030557B (en) * | 2019-03-08 | 2020-10-16 | 惠安县崇武镇石板然茶叶店 | Even volume blending industrial garbage pyrolysis gasification incineration equipment |
| CN113739185B (en) * | 2021-09-03 | 2024-06-04 | 北京蓝天晨曦环境科技有限公司 | Treatment process for dioxin in high-temperature flue gas of garbage incineration power plant |
| CN115329659B (en) * | 2022-07-18 | 2023-07-14 | 浙江大学 | Method and system for real-time early warning and intelligent control of dioxin emission of waste incinerator |
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2009
- 2009-01-15 CN CN2009100956457A patent/CN101485955B/en active Active
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| Publication number | Publication date |
|---|---|
| CN101485955A (en) | 2009-07-22 |
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