CN201327042Y - Device for removing nitrogen oxide and dioxin in waste gas of low ash zone of burning facility - Google Patents
Device for removing nitrogen oxide and dioxin in waste gas of low ash zone of burning facility Download PDFInfo
- Publication number
- CN201327042Y CN201327042Y CNU2008201693445U CN200820169344U CN201327042Y CN 201327042 Y CN201327042 Y CN 201327042Y CN U2008201693445 U CNU2008201693445 U CN U2008201693445U CN 200820169344 U CN200820169344 U CN 200820169344U CN 201327042 Y CN201327042 Y CN 201327042Y
- Authority
- CN
- China
- Prior art keywords
- dioxin
- waste gas
- catalyst
- nitrogen oxide
- burning facility
- 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.)
- Expired - Lifetime
Links
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 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 claims abstract 11
- 239000002912 waste gas Substances 0.000 title abstract description 15
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 32
- 239000007789 gas Substances 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 239000003054 catalyst Substances 0.000 claims description 45
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 abstract description 5
- 239000000428 dust Substances 0.000 abstract description 4
- 239000002253 acid Substances 0.000 abstract description 2
- 238000003723 Smelting Methods 0.000 abstract 1
- 239000003245 coal Substances 0.000 abstract 1
- 239000003344 environmental pollutant Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 231100000719 pollutant Toxicity 0.000 abstract 1
- 239000002699 waste material Substances 0.000 abstract 1
- KVGZZAHHUNAVKZ-UHFFFAOYSA-N 1,4-Dioxin Chemical compound O1C=COC=C1 KVGZZAHHUNAVKZ-UHFFFAOYSA-N 0.000 description 18
- 238000005516 engineering process Methods 0.000 description 5
- 238000006722 reduction reaction Methods 0.000 description 4
- 229910010413 TiO 2 Inorganic materials 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000607 poisoning effect Effects 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000003421 catalytic decomposition reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 150000002013 dioxins Chemical class 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000002906 medical waste Substances 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Chimneys And Flues (AREA)
Abstract
The utility model discloses a device for removing nitrogen oxide and dioxin in waste gas of low ash zone of burning facility, which comprises a waste gas inlet section, one or a plurality of selective catalytic reaction sections and a gas outlet section, wherein a plurality of catalysis heating units which are in parallel with an axial cord are installed in the selective catalytic reaction sections, each catalysis heating unit is composed of two accelerant plates and a heating component which is clamped between the two accelerant plates, and a gap is arranged between neighboring catalysis heating units to form a waste gas channel. The device of the utility model is installed on a low ash zone behind a dust removing and acid removing device of the burning facility, the waste gas enters the selective catalytic reaction sections through the waste gas inlet section, and the nitrogen oxide and the dioxin generate catalytic reactions on the surface of the heated accelerant plates on the selective catalytic reaction sections to achieve the purpose of removing nitrogen oxide and dioxin. The device can be applied in eliminating and reducing pollutants such as nitrogen oxide and dioxin in waste gas which is generated in the high temperature processes such as waste burning, fire coal power plants, metal smelting and the like.
Description
Technical field
The utility model relates to a kind of equipment of removing low gray area nitrogen oxides of exhaust gas of burning facility and dioxin.
Background technology
Some factories such as garbage burning factory, metallurgical works, coal-fired power plant etc. in the high temperature incineration process, can produce two kinds of main noxious material nitrogen oxide (NO
X) and dioxin (Dioxins also claims PCDD/DFs).The former can cause multiple environmental problem to comprise photochemical fog, acid rain etc.; The latter is persistent organic pollution, comprises polychlorinated dibenzo-2 evil English class (PCDDs) and polychlorinated dibenzo (PCDFs), and these materials produce huge injury by food chain enrichment in human body to human body.Countries in the world are one after another by the rules and the in addition strict control that takes appropriate measures.
In order to reduce the discharging of nitrogen oxide, selectivity catalytic reaction technology (Selective Catalytic Reaction is called for short SCR) be use in the world at present technology the most widely, also be the catalytic denitration technology.The SCR ratio juris is: with NH
3(or urea) injects exhaust pipe, mixes the back and utilizes the reduction of catalyst to make NO, NO on catalytic bed
2With NH
3At 200-450 ℃ the reduction reaction taking place down, generates harmless N
2And H
2O, main reduction reaction formula is:
4NO+4NH
3+O
2→4N
2+6H
2O
6NO
2+8NH
3→7N
2+12H
2O
The equipment of existing removal burning facility nitrogen oxides of exhaust gas and dioxin comprises the exhaust gas inlet section, one or more selectivity catalyst reaction section and gas outlet section.In order to reduce the discharging of dioxin in the waste gas, main employing is that active carbon adsorption is handled in early days.But it is solid-state that this method just is converted to the dioxin absorption of gaseous state, and can't decompose dioxin, active carbon to be discarded imbed underground after, the potential threat that is entered human body by plant absorbing through food chain is still arranged.New effective treating method is to adopt the appropriate catalyst system under suitable temperature (more than 250 ℃) its catalytic decomposition to be become CO
2And H
2The composition that O etc. are innoxious.
The a large amount of research-on-research of process and is discovered: adopt selectivity catalytic reaction technology, with Detitanium-ore-type TiO
2Deng being load, with VO
XDeng catalyst nitrogen oxide and two kinds of toxic gases of dioxin all there is good catalytic effect for activity.For example, adopt WO
X-VO
X-TiO
2And MoO
X-VO
X-TiO
2Etc. system, can both effectively realize NO
XReduction of discharging with PCDD/DFs.
The selectivity catalytic reaction system mainly can use in high gray area and low gray area respectively according to its position difference of installing.The selectivity catalytic reaction system that uses is installed in high gray area mostly at present, because the sour gas such as sulfur dioxide in the waste gas cause the poisoning of catalyst and inactivation, and a large amount of flying dusts washes away performance and the service life that has a strong impact on catalyst the high speed of catalyst.For the selectivity catalytic reaction system that uses in low gray area, behind cleaner (generally adopting pocket type control of dust or electrostatic precipitator) and deacidification equipment (half dry type or wet type are removed acid tower), the temperature of waste gas is about 150 ℃, and it is temperature required to satisfy catalytic reaction.Therefore usually adopt the mode that waste gas is heated again to improve EGT, the not only construction of facility and operating cost costliness, and also energy loss is serious.
Summary of the invention
The purpose of this utility model is the low gray area nitrogen oxides of exhaust gas of removal burning facility in design a kind of low energy consumption, low cost, prolongation catalyst service life and the equipment of dioxin.
The equipment of low gray area nitrogen oxides of exhaust gas of removal burning facility of the present utility model and dioxin, comprise the exhaust gas inlet section, one or more selectivity catalyst reaction section and gas outlet section, a plurality of catalysis heating units that parallel to the axis are installed in the selectivity catalyst reaction section, each catalysis heating unit is made up of two catalyst plates heater block middle with being clipped in two catalyst plates, have the gap between adjacent catalysis heating unit, form exhaust steam passage.
In the utility model, said heater block can be heating resistor plate or resistance wire, also can be the gas heating tube, and the used thermal source of gas heating tube is hot gas or high-temperature vapor.
In the utility model, said catalyst plates can be the denitrating catalyst plate, or removes the catalyst plates of dioxin, or the mixed catalyst plate of denitration and removal dioxin.
In the utility model, when adopting a plurality of selectivity catalyst reaction section, adjacent two axial half-twists of selectivity catalyst reaction section.
During use, equipment of the present utility model is installed in the burning facility dedusting and the low gray area of the equipment that deacidifies, waste gas enters the selectivity catalyst reaction section through the exhaust gas inlet section.In the selectivity catalyst reaction section, catalytic reaction takes place on the catalyst plates surface of heating in nitrogen oxide or dioxin, reaches the purpose of removing nitrogen oxide and dioxin.
The beneficial effects of the utility model are:
The equipment of low gray area nitrogen oxides of exhaust gas of removal burning facility of the present utility model and dioxin, in the selectivity catalyst reaction section catalysis heating unit has been installed, by mode to the catalyst plates heating, reach the required temperature conditions of catalytic reaction, replace traditional passing through the mode of large quantity of exhaust gas preheating has been reached the required temperature conditions of catalytic reaction, greatly reduced energy consumption cost.Equipment of the present utility model is installed in after burning facility dedusting and the deacidification equipment, can effectively prevent the etching of high speed dust to catalyst, prevents dust and SO
2The poisoning effect of the catalyst plates that causes Deng sour gas, thus the service life of catalyst plates prolonged, reach the effect that reduces operating cost and energy consumption.The utility model can be used for ultra-large metallurgical works, coal-fired power plant, also can be used for the waste gas cleaning system of small-sized house refuse and medical wastes incineration facility.Meet and build resource-conserving and environment friendly social requirement.
Description of drawings
Fig. 1 is the formation schematic diagram of the utility model equipment;
Fig. 2 is a kind of catalysis heating unit schematic diagram;
Fig. 3 is another kind of catalysis heating unit schematic diagram.
The specific embodiment
Further specify the utility model below in conjunction with accompanying drawing.
With reference to Fig. 1, the equipment of low gray area nitrogen oxides of exhaust gas of removal burning facility of the present utility model and dioxin, comprise exhaust gas inlet section 1, one or more selectivity catalyst reaction section 2 and gas outlet section 3, a plurality of catalysis heating units 4 that parallel to the axis are installed in selectivity catalyst reaction section 2, have the gap between adjacent catalysis heating unit, form exhaust steam passage 7.In the legend, have two selectivity catalyst reaction section, these two axial half-twists of selectivity catalyst reaction section,
Fig. 2, Fig. 3 are respectively the formation example of catalysis heating unit, and catalysis heating unit 4 is made up of two catalyst plates 5 heater block 6 middle with being clipped in two catalyst plates.Heater block 6 is the heating resistor plate among Fig. 2, and heater block 6 is the gas heating tube among Fig. 3, and gases used can be high-temp waste gas, or high-temperature water vapor.
During use, through the waste gas after dedusting and the depickling processing, enter the selectivity catalyst reaction section through the exhaust gas inlet section, in the selectivity catalyst reaction section, catalytic reaction takes place in nitrogen oxide or the dioxin catalyst plates surface after heating, reaches the purpose of removing nitrogen oxides from exhaust gas and dioxin.
Claims (4)
1. remove the equipment of low gray area nitrogen oxides of exhaust gas of burning facility and dioxin, comprise exhaust gas inlet section (1), one or more selectivity catalyst reaction section (2) and gas outlet section (3), it is characterized in that in selectivity catalyst reaction section (2), being equipped with a plurality of catalysis heating units (4) that parallel to the axis, each catalysis heating unit is made up of two catalyst plates (5) and the heater block (6) that is clipped in the middle of two catalyst plates, have the gap between adjacent catalysis heating unit, form exhaust steam passage (7).
2. the equipment of low gray area nitrogen oxides of exhaust gas of removal burning facility according to claim 1 and dioxin is characterized in that heater block (6) is heating resistor plate or resistance wire, perhaps is the gas heating tube.
3. the equipment of low gray area nitrogen oxides of exhaust gas of removal burning facility according to claim 1 and dioxin, it is characterized in that said catalyst plates is the denitrating catalyst plate, or the catalyst plates of removal dioxin, or the mixed catalyst plate of denitration and removal dioxin.
4. removal burning facility according to claim 1 hangs down the equipment of gray area nitrogen oxides of exhaust gas and dioxin, it is characterized in that adjacent two axial half-twists of selectivity catalyst reaction section of a plurality of selectivity catalyst reaction section (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201693445U CN201327042Y (en) | 2008-12-02 | 2008-12-02 | Device for removing nitrogen oxide and dioxin in waste gas of low ash zone of burning facility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201693445U CN201327042Y (en) | 2008-12-02 | 2008-12-02 | Device for removing nitrogen oxide and dioxin in waste gas of low ash zone of burning facility |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201327042Y true CN201327042Y (en) | 2009-10-14 |
Family
ID=41179014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201693445U Expired - Lifetime CN201327042Y (en) | 2008-12-02 | 2008-12-02 | Device for removing nitrogen oxide and dioxin in waste gas of low ash zone of burning facility |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201327042Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101444701B (en) * | 2008-12-02 | 2011-02-09 | 杨杭生 | A device for removing nitrogen oxides and dioxins from waste gas in the low ash area of an incineration facility |
| CN102698578A (en) * | 2011-04-08 | 2012-10-03 | 上海同利环境科技有限公司 | Process for synchronously removing nitrogen oxide, dioxin and offensive odor in flue gas from waste incineration |
| CN104740984A (en) * | 2015-04-16 | 2015-07-01 | 江苏中金环保科技有限公司 | System and method for removing nitric oxide and dioxin in sintering flue gas |
-
2008
- 2008-12-02 CN CNU2008201693445U patent/CN201327042Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101444701B (en) * | 2008-12-02 | 2011-02-09 | 杨杭生 | A device for removing nitrogen oxides and dioxins from waste gas in the low ash area of an incineration facility |
| CN102698578A (en) * | 2011-04-08 | 2012-10-03 | 上海同利环境科技有限公司 | Process for synchronously removing nitrogen oxide, dioxin and offensive odor in flue gas from waste incineration |
| CN104740984A (en) * | 2015-04-16 | 2015-07-01 | 江苏中金环保科技有限公司 | System and method for removing nitric oxide and dioxin in sintering flue gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20091014 Effective date of abandoning: 20081202 |