CN102949933B - The denitration device of heat supply coal-burning boiler - Google Patents
The denitration device of heat supply coal-burning boiler Download PDFInfo
- Publication number
- CN102949933B CN102949933B CN201110242643.3A CN201110242643A CN102949933B CN 102949933 B CN102949933 B CN 102949933B CN 201110242643 A CN201110242643 A CN 201110242643A CN 102949933 B CN102949933 B CN 102949933B
- Authority
- CN
- China
- Prior art keywords
- catalyst
- module
- heat supply
- burning boiler
- denitration device
- 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.)
- Active
Links
Abstract
The invention provides a kind of denitration device of heat supply coal-burning boiler, comprising: higher pressure steam inlet; Smoke inlet; Pre-catalytic module, is connected with described smoke inlet with described higher pressure steam inlet; First catalyst module, is arranged at the downstream of described pre-catalytic module; And export the breeze door, be positioned at the downstream of described first catalyst module, wherein, discharge from described export the breeze door after described pre-catalytic module and the first catalyst module process from the high steam of described higher pressure steam inlet and the flue gas of described smoke inlet.The present invention more effectively can suppress SO
3generation, thus extend the service life of air flue equipment.On the other hand, by adopting novel catalyst, the phenomenon that technology of the present invention can effectively avoid catalyst poisoning etc. bad.
Description
Technical field
The present invention relates to a kind of denitration device of novel heat supply coal-burning boiler.
Background technology
Amino-oxide is contained apparently higher than all the other heat power equipments in the fume emission of coal-burning boiler.And amino-oxide is one of primary pollution source causing atmosphere pollution.The 70% direct burning coming from coal in the discharge capacity of China's amino-oxide, thermal power generation is again the coal-fired rich and influential family of China, and therefore, thermal power plant is NO
xone of main source of discharge.Therefore, too much NO is produced for preventing after coal combustion in boiler
xcontaminated environment, reply coal carries out denitration process.
Selective-catalytic-reduction denitrified technique (SCR) is gas denitrifying technology the most ripe at present, and it is method of denitration after a kind of stove, completes comercial operation the earliest by Japan in the later stage 60 ~ seventies 20th century, is utilize reducing agent (NH
3, urea) and under metallic catalyst effect, optionally with NO
xreaction generates N
2and H
2o, instead of by O
2oxidation, therefore be called " selective ".SCR technique popular in the world is mainly divided into ammonia process SCR and urea method SCR2 kind at present.These 2 kinds of methods are all utilize ammonia to NO
xrestoring function, by NO under the effect of catalyst
x(mainly NO) is reduced to the N on the few of impact of air
2and water, reducing agent is NH
3.But the shortcoming of current SCR denitration technology is: containing sulphur content in fuel, a certain amount of SO3 can be generated in combustion process.After adding catalyst, under aerobic conditions, SO
3growing amount significantly increase, and with excessive NH
3generate NH
4hSO
4.NH
4hSO
4there is corrosivity and viscosity, back-end ductwork device damage can be caused.Although SO
3growing amount limited, but its impact caused can not be underestimated.In addition, catalyst poisoning phenomenon also can not be ignored.
Summary of the invention
The invention provides a kind of denitration device of novel heat supply coal-burning boiler.Particularly, the invention provides a kind of denitration device of heat supply coal-burning boiler, comprising:
Higher pressure steam inlet;
Smoke inlet;
Pre-catalytic module, is connected with described smoke inlet with described higher pressure steam inlet;
First catalyst module, is arranged at the downstream of described pre-catalytic module; And
Export the breeze door, is positioned at the downstream of described first catalyst module,
Wherein, discharge from described export the breeze door after described pre-catalytic module and the first catalyst module process from the high steam of described higher pressure steam inlet and the flue gas of described smoke inlet.
According to a preferred embodiment, in the denitration device of above-mentioned heat supply coal-burning boiler, also comprise: the second catalyst module, be arranged at the downstream of described first catalyst module.
According to a preferred embodiment, in the denitration device of above-mentioned heat supply coal-burning boiler, the downstream of described second catalyst module is connected to a denitration bypass further, and this denitration bypass is connected with described smoke inlet.
According to a preferred embodiment, in the denitration device of above-mentioned heat supply coal-burning boiler, also comprise: ammonia injects grid, is arranged at described smoke inlet place; And ammonia injection device, provide ammonia via described ammonia injection grille to described pre-catalytic module.
According to a preferred embodiment, in the denitration device of above-mentioned heat supply coal-burning boiler, also comprise: mixing arrangement, be arranged at described ammonia and inject between grid and described pre-catalytic module, for ammonia and flue gas mixing.
According to a preferred embodiment, in the denitration device of above-mentioned heat supply coal-burning boiler, the catalyst adopted in described first catalyst module is TiO
2as the V of carrier
2o
5and WO
3.
According to a preferred embodiment, in the denitration device of above-mentioned heat supply coal-burning boiler, the catalyst adopted in described second catalyst module is TiO
2as the MoO of carrier.
The denitration device of the present invention to the heat supply coal-burning boiler of prior art all improves in structure and catalysis material.Therefore, more effectively SO can be suppressed
3generation, thus extend the service life of air flue equipment.On the other hand, by adopting novel catalyst, the phenomenon that technology of the present invention can effectively avoid catalyst poisoning etc. bad.
Should be appreciated that more than the present invention generality describe and the following detailed description be all exemplary and explanat, and be intended to for as claimed in claim the invention provides further explanation.
Accompanying drawing explanation
Accompanying drawing is mainly used for providing further to be understood the present invention.Accompanying drawing shows embodiments of the invention, and plays the effect explaining the principle of the invention together with this description.In accompanying drawing:
Fig. 1 schematically shows the structure of the denitration device of heat supply coal-burning boiler according to an embodiment of the invention.
Detailed description of the invention
Technical scheme of the present invention is described in detail below in conjunction with accompanying drawing.
Fig. 1 schematically shows the structure of the denitration device of heat supply coal-burning boiler according to an embodiment of the invention.As shown in Figure 1, the denitration device 100 of heat supply coal-burning boiler of the present invention at least can comprise: higher pressure steam inlet 101, smoke inlet 102, pre-catalytic module 103, first catalyst module 104, second catalyst module 105 and export the breeze door 106.
Pre-catalytic module 103 and described higher pressure steam inlet 101 first catalyst module 104 that is connected with described smoke inlet 102 is arranged at the downstream of described pre-catalytic module 102.As shown in the figure, the second catalyst module 105 is arranged at the downstream of described first catalyst module 104.Export the breeze door 106 is positioned at the downstream of described first catalyst module 104 and the second catalyst module 105.As illustrated by the arrows in fig. 1, discharge from described export the breeze door 106 after described pre-catalytic module 103 and the process of the first catalyst module 104 from the high steam of described higher pressure steam inlet 101 and the flue gas of described smoke inlet 102.
Be appreciated that in the present invention, two catalyst modules might not be set, but independent one or more catalyst modules can be set according to actual needs.Similar number change does not affect realization of the present invention.
In the preferred embodiment shown in Fig. 1, the catalyst adopted in described first catalyst module 104 is preferably TiO
2as the V of carrier
2o
5and WO
3.And the catalyst adopted in described second catalyst module 105 is TiO
2as the MoO of carrier.The catalyst adopted in above preferred embodiment is all the material less to human injury, therefore compared to the catalyst material generally adopted in prior art, effectively can avoid the phenomenon that catalyst poisoning etc. is bad.
According to a preferred embodiment, in the denitration device 100 of above-mentioned heat supply coal-burning boiler, the downstream of described second catalyst module 105 is connected to a denitration bypass 107 further, and this denitration bypass 107 is connected with described smoke inlet 102.Like this, the part low-temperature flue gas after denitration can be made to reenter exhaust gases passes, and one can reduce the temperature entering flue gas, and two can make partial fume experience second time catalytic treatment to suppress SO
3generation, extend service life of flue.
According to a preferred embodiment, in the denitration device 100 of above-mentioned heat supply coal-burning boiler, the ammonia being arranged at described smoke inlet 102 place can also be had and inject grid 108 and provides ammonia to described pre-catalytic module 103 ammonia injection device 109 via described ammonia injection grille 108.On the other hand, more a mixing arrangement 110 can be arranged at described ammonia and inject between grid 108 and described pre-catalytic module 103, mix fully for ammonia and flue gas.
In sum, the denitration device of the present invention to the heat supply coal-burning boiler of prior art all improves in structure and catalysis material.Therefore, more effectively SO can be suppressed
3generation, thus extend the service life of air flue equipment.On the other hand, by adopting novel catalyst, the phenomenon that technology of the present invention can effectively avoid catalyst poisoning etc. bad.In addition, the mainly environmental benefit that denitration of boiler smoke plant investment brings and social benefit, substantially can say without direct economic benefit, therefore denitrification investment has particularity to power plant itself.Current large-sized station boiler completes the transformation of denitrification apparatus substantially, and along with the enhancing of Environmental Protection in China consciousness, the sound and law enforcement dynamics of corresponding laws and regulations strengthens, and the transformation of industrialization miniature boiler denitrification apparatus is imperative.
Above-described embodiment is available to those of ordinary skill in the art to realize or uses of the present invention; those of ordinary skill in the art can be without departing from the present invention in the case of the inventive idea; various modifications or change are made to above-described embodiment; thus protection scope of the present invention not limit by above-described embodiment, and should be the maximum magnitude meeting the inventive features that claims are mentioned.
Claims (5)
1. a denitration device for heat supply coal-burning boiler, is characterized in that, comprising:
Higher pressure steam inlet;
Smoke inlet;
Pre-catalytic module, is connected with described smoke inlet with described higher pressure steam inlet;
First catalyst module, is arranged at the downstream of described pre-catalytic module;
Second catalyst module, is arranged at the downstream of described first catalyst module, and the catalyst adopted in described second catalyst module is TiO
2as the MoO of carrier; And
Export the breeze door, is positioned at the downstream of described first catalyst module,
Wherein, discharge from described export the breeze door after described pre-catalytic module and the first catalyst module process from the high steam of described higher pressure steam inlet and the flue gas of described smoke inlet.
2. the denitration device of heat supply coal-burning boiler as claimed in claim 1, it is characterized in that, the downstream of described second catalyst module is connected to a denitration bypass further, and this denitration bypass is connected with described smoke inlet.
3. the denitration device of heat supply coal-burning boiler as claimed in claim 1, is characterized in that, also comprise:
Ammonia injects grid, is arranged at described smoke inlet place; And
Ammonia injection device, provides ammonia via described ammonia injection grille to described pre-catalytic module.
4. the denitration device of heat supply coal-burning boiler as claimed in claim 3, is characterized in that, also comprise:
Mixing arrangement, is arranged at described ammonia and injects between grid and described pre-catalytic module, for ammonia and flue gas mixing.
5. the denitration device of heat supply coal-burning boiler as claimed in claim 1, it is characterized in that, the catalyst adopted in described first catalyst module is TiO
2as the V of carrier
2o
5and WO
3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110242643.3A CN102949933B (en) | 2011-08-23 | 2011-08-23 | The denitration device of heat supply coal-burning boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110242643.3A CN102949933B (en) | 2011-08-23 | 2011-08-23 | The denitration device of heat supply coal-burning boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102949933A CN102949933A (en) | 2013-03-06 |
| CN102949933B true CN102949933B (en) | 2016-03-09 |
Family
ID=47759662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110242643.3A Active CN102949933B (en) | 2011-08-23 | 2011-08-23 | The denitration device of heat supply coal-burning boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102949933B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8980212B1 (en) * | 2013-08-21 | 2015-03-17 | Alstom Technology Ltd | Flue gas stream bypass during selective catalytic reduction in a power plant |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1173387A (en) * | 1996-07-08 | 1998-02-18 | 波克股份有限公司 | Removal of nitrogen oxides from gas streams |
| CN1559680A (en) * | 2004-02-16 | 2005-01-05 | 杨典明 | Desulfur catalyst |
| US7615200B2 (en) * | 2000-12-01 | 2009-11-10 | Fuel Tech, Inc. | Selective catalytic reduction of NOx enabled by urea decomposition in heat-exchanger bypass |
| CN101637700A (en) * | 2009-08-14 | 2010-02-03 | 中电投远达环保工程有限公司 | SCR denitrification process and denitrification device of ammonia injection grid adopting non-unidiameter injection orifices |
| CN101898086A (en) * | 2010-06-25 | 2010-12-01 | 无锡迅德环保科技有限公司 | Power-generation and denitrification integrated device by residual heat of glass furnace and method thereof |
-
2011
- 2011-08-23 CN CN201110242643.3A patent/CN102949933B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1173387A (en) * | 1996-07-08 | 1998-02-18 | 波克股份有限公司 | Removal of nitrogen oxides from gas streams |
| US7615200B2 (en) * | 2000-12-01 | 2009-11-10 | Fuel Tech, Inc. | Selective catalytic reduction of NOx enabled by urea decomposition in heat-exchanger bypass |
| CN1559680A (en) * | 2004-02-16 | 2005-01-05 | 杨典明 | Desulfur catalyst |
| CN101637700A (en) * | 2009-08-14 | 2010-02-03 | 中电投远达环保工程有限公司 | SCR denitrification process and denitrification device of ammonia injection grid adopting non-unidiameter injection orifices |
| CN101898086A (en) * | 2010-06-25 | 2010-12-01 | 无锡迅德环保科技有限公司 | Power-generation and denitrification integrated device by residual heat of glass furnace and method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102949933A (en) | 2013-03-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103900391B (en) | Selective sintering-machine flue-gas heat exchange and denitration system and method thereof | |
| CN104888591A (en) | Boiler flue gas denitration purification system and boiler flue gas denitration purification method | |
| CN107376930B (en) | In-situ regeneration method and device for sulfur poisoning SCR denitration catalyst | |
| CN105251326A (en) | Reduction and oxidation combined denitration system and denitration method thereof | |
| UA109657C2 (en) | Selective catalytic reduction via electrolysis of urea | |
| CN102233238A (en) | System and method for controlling and reducing NOx emissions | |
| CN104296543A (en) | Denitration and waste heat recovery integrated furnace | |
| CN106853327B (en) | Low-temperature flue gas desulfurization and denitrification integrated method and device | |
| CN102188904A (en) | Denitration system and method for sintering flue gas without ammonia reducing agent | |
| CN103954140B (en) | A kind of sintering device flue gas low-temperature denitrifying system and method thereof | |
| CN205073858U (en) | DeNOx systems is united with oxidation to reduction | |
| CN107930396B (en) | Method for concentrated and efficient desulfurization and denitrification of sintering flue gas | |
| CN102949933B (en) | The denitration device of heat supply coal-burning boiler | |
| CN105195013A (en) | Denitration and demercuration apparatus and method with CFB (circulating fluidized bed) boiler | |
| CN202844873U (en) | Annular nitric oxide waste gas purifier | |
| CN203215697U (en) | Energy-saving denitration incinerator | |
| CN102240505A (en) | Method for reducing NO by using iron catalyst | |
| CN109173724A (en) | A kind of method of coal combustion high-temperature flue gas denitration | |
| CN205127744U (en) | CFB boiler denitration demercuration device | |
| CN103341306B (en) | A kind of method of poor ammonia SNCR reduction and oxidative absorption combined denitration demercuration | |
| CN204352760U (en) | Furnace for domestic refuse SCR flue gas denitrification system | |
| CN202224035U (en) | Denitration system for boiler gas fume | |
| CN201823478U (en) | Integrated treatment device for flue gas denitration | |
| CN111495176A (en) | System for removing escaping ammonia and other pollutants in flue gas | |
| CN205803449U (en) | A kind of thermal power plant flue gas utilization system for both culturing microalgae |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |