CN110856800A - High-temperature denitration system for selective catalytic reduction - Google Patents
High-temperature denitration system for selective catalytic reduction Download PDFInfo
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- CN110856800A CN110856800A CN201810961065.0A CN201810961065A CN110856800A CN 110856800 A CN110856800 A CN 110856800A CN 201810961065 A CN201810961065 A CN 201810961065A CN 110856800 A CN110856800 A CN 110856800A
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- ammonia
- catalytic reduction
- selective catalytic
- mixer
- scr reactor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses a high-temperature denitration system for selective catalytic reduction, which comprises a boiler (1), an air preheater (2), a blower (3), an ammonia injection grid (4), a mixer (5), an ammonia/air dilution mixer (6), an SCR reactor (7), a soot blower (8), a dust remover (9), a draught fan (10), a dilution fan (11), an ammonia evaporator (12), an ammonia storage tank (13), an ammonia unloading compressor (14) and a liquid ammonia tank car (15), one side of the boiler (1) is respectively connected with an air preheater (2) and an ammonia injection grid (4), two ends of the air preheater (2) are respectively connected with the blower (3) and the dust remover (9), dust remover one end is connected with the draught fan, ammonia injection grid one end is connected with the blender, and blender one end and air heater one end all are connected with the SCR reactor. The invention adopts the high-temperature denitration system for selective catalytic reduction, the structural design is reasonable, and the denitration efficiency can reach more than 90%.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a high-temperature denitration system for selective catalytic reduction.
Background
At present, the existing denitration system is complex in structure, high in manufacturing cost, low in denitration efficiency and poor in environmental protection effect. Therefore, it is urgently required for those skilled in the art to develop a high-temperature denitration system for selective catalytic reduction.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a high-temperature denitration system for selective catalytic reduction.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows: a high-temperature denitration system for selective catalytic reduction comprises a boiler, an air preheater, a blower, an ammonia spraying grid, a mixer, an ammonia/air dilution mixer, an SCR reactor, a soot blower, a dust remover, an induced draft fan, a dilution fan, an ammonia evaporator, an ammonia storage tank, an ammonia unloading compressor and a liquid ammonia tank car, wherein one side of the boiler is respectively connected with the air preheater and the ammonia spraying grid, the two ends of the air preheater are respectively connected with the blower and the dust remover, one end of the dust remover is connected with the induced draft fan, one end of the ammonia spraying grid is connected with the mixer, one end of the mixer and one end of the air preheater are both connected with the SCR reactor, the SCR reactor is connected with the soot blower, the upper end of the ammonia spraying grid is also connected with the ammonia/air dilution mixer, one end of the ammonia/air dilution mixer is respectively connected with the dilution fan and the ammonia storage tank, one end of the ammonia storage tank is connected with an ammonia evaporator, the other end of the ammonia storage tank is connected with an ammonia unloading compressor, and one end of the ammonia unloading compressor is connected with a liquid ammonia tank car.
As a further technical scheme of the invention, an economizer is arranged in the boiler.
As a further technical scheme of the invention, at least three groups of catalyst devices are arranged in the SCR reactor.
As a further technical proposal of the invention, the effective reaction temperature range of the SCR reactor is between 320 ℃ and 400 ℃.
Based on the technical scheme, compared with the prior art, the invention has the following technical advantages:
the invention adopts the high-temperature denitration system for selective catalytic reduction, has reasonable structural design, low manufacturing cost, high working efficiency, good environmental protection effect and high social benefit, and the denitration efficiency can reach more than 90 percent.
Drawings
Fig. 1 is a schematic structural view of a high-temperature denitration system for selective catalytic reduction according to the present invention.
In the figure: 1. the system comprises a boiler, 2. an air preheater, 3. a blower, 4. an ammonia injection grid, 5. a mixer, 6. an ammonia/air dilution mixer, 7. an SCR reactor, 8. a soot blower, 9. a dust remover, 10. an induced draft fan, 11. a dilution fan, 12. an ammonia evaporator, 13. an ammonia storage tank, 14. an ammonia discharge compressor, 15. a liquid ammonia tank car, 16. an economizer and 17. a catalyst device.
Detailed Description
The invention is further explained below with reference to the figures and examples.
As shown in fig. 1, a high temperature denitration system for selective catalytic reduction, which comprises a boiler 1, an air preheater 2, a blower 3, an ammonia injection grid 4, a mixer 5, an ammonia/air dilution mixer 6, an SCR reactor 7, a soot blower 8, a dust remover 9, an induced draft fan 10, a dilution fan 11, an ammonia evaporator 12, an ammonia storage tank 13, an ammonia unloading compressor 14 and a liquid ammonia tank car 15, wherein one side of the boiler 1 is respectively connected with the air preheater 2 and the ammonia injection grid 4, two ends of the air preheater 2 are respectively connected with the blower 3 and the dust remover 9, one end of the dust remover 9 is connected with the induced draft fan 10, one end of the ammonia injection grid 4 is connected with the mixer 5, one end of the mixer 5 and one end of the air preheater 2 are both connected with the SCR reactor 7, the effective reaction temperature range of the SCR reactor 7 is between 320 ℃ and 400 ℃, the SCR reactor 7 is connected with the soot blower 8, the upper end of the ammonia injection grid 4 is also connected with an ammonia/air dilution mixer 6, one end of the ammonia/air dilution mixer 6 is respectively connected with a dilution fan 11 and an ammonia storage tank 13, one end of the ammonia storage tank 13 is connected with an ammonia evaporator 12, the other end of the ammonia storage tank is connected with an ammonia unloading compressor 14, and one end of the ammonia unloading compressor 14 is connected with a liquid ammonia tank wagon 15.
An economizer 16 is arranged in the boiler 1. At least three groups of catalyst devices 17 are arranged in the SCR reactor 7.
The foregoing is illustrative and explanatory of the invention and is not intended to limit the advantages attainable thereby, and it is within the scope of the present application for any one or more of the advantages to be realized, whether simple changes in construction and/or implementation in some embodiments are possible in the practice of the invention.
Claims (4)
1. The utility model provides a high temperature deNOx systems for selective catalytic reduction which characterized in that: it comprises a boiler (1), an air preheater (2), a blower (3), an ammonia injection grid (4), a mixer (5), an ammonia/air dilution mixer (6), an SCR reactor (7), a soot blower (8), a dust remover (9), an induced draft fan (10), a dilution fan (11), an ammonia evaporator (12), an ammonia storage tank (13), an ammonia unloading compressor (14) and a liquid ammonia tank car (15), wherein one side of the boiler (1) is respectively connected with the air preheater (2) and the ammonia injection grid (4), two ends of the air preheater (2) are respectively connected with the blower (3) and the dust remover (9), one end of the dust remover (9) is connected with the induced draft fan (10), one end of the ammonia injection grid (4) is connected with the mixer (5), one end of the mixer (5) and one end of the air preheater (2) are both connected with the SCR reactor (7), SCR reactor (7) are connected with soot blower (8), ammonia injection grid (4) upper end still is connected with ammonia/air dilution blender (6), ammonia/air dilution blender (6) one end is connected with dilution fan (11) and ammonia storage tank (13) respectively, ammonia storage tank (13) one end is connected with ammonia evaporator (12), and the other end is connected with unloading ammonia compressor (14), it is connected with liquid ammonia tank wagon (15) to unload ammonia compressor (14) one end.
2. The high-temperature denitration system for selective catalytic reduction according to claim 1, characterized in that: an economizer (16) is arranged in the boiler (1).
3. The high-temperature denitration system for selective catalytic reduction according to claim 1, characterized in that: at least three groups of catalyst devices (17) are arranged in the SCR reactor (7).
4. The high-temperature denitration system for selective catalytic reduction according to claim 1, characterized in that: the effective reaction temperature range of the SCR reactor (7) is between 320 ℃ and 400 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810961065.0A CN110856800A (en) | 2018-08-22 | 2018-08-22 | High-temperature denitration system for selective catalytic reduction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810961065.0A CN110856800A (en) | 2018-08-22 | 2018-08-22 | High-temperature denitration system for selective catalytic reduction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110856800A true CN110856800A (en) | 2020-03-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810961065.0A Withdrawn CN110856800A (en) | 2018-08-22 | 2018-08-22 | High-temperature denitration system for selective catalytic reduction |
Country Status (1)
| Country | Link |
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| CN (1) | CN110856800A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6403046B1 (en) * | 1999-07-26 | 2002-06-11 | Hera, Llc | Pollution control systems using urea and ammonia for the control of emissions from the flue gas of fossil fuel burning facilities |
| CN103041703A (en) * | 2012-12-27 | 2013-04-17 | 浙江信耳科技有限公司 | SCR (Selective Catalytic Reduction) flue gas denitration system for burning lignite |
| CN103055696A (en) * | 2012-12-27 | 2013-04-24 | 浙江信耳科技有限公司 | A SCR flue gas denitrification system having a pre-positioned dual fluid injection system |
| CN203002215U (en) * | 2012-12-27 | 2013-06-19 | 浙江信耳科技有限公司 | SCR (Selective Catalytic Reduction) flue gas denitration system for burning lignite |
| CN203043817U (en) * | 2013-01-24 | 2013-07-10 | 傅宁芳 | Selective catalytic reduction (SCR) denitration system capable of increasing flue gas temperature by utilizing high-temperature steam |
| CN104324611A (en) * | 2014-10-29 | 2015-02-04 | 成都快典科技有限公司 | Flue gas SCR denitration system of thermal power plant |
-
2018
- 2018-08-22 CN CN201810961065.0A patent/CN110856800A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6403046B1 (en) * | 1999-07-26 | 2002-06-11 | Hera, Llc | Pollution control systems using urea and ammonia for the control of emissions from the flue gas of fossil fuel burning facilities |
| CN103041703A (en) * | 2012-12-27 | 2013-04-17 | 浙江信耳科技有限公司 | SCR (Selective Catalytic Reduction) flue gas denitration system for burning lignite |
| CN103055696A (en) * | 2012-12-27 | 2013-04-24 | 浙江信耳科技有限公司 | A SCR flue gas denitrification system having a pre-positioned dual fluid injection system |
| CN203002215U (en) * | 2012-12-27 | 2013-06-19 | 浙江信耳科技有限公司 | SCR (Selective Catalytic Reduction) flue gas denitration system for burning lignite |
| CN203043817U (en) * | 2013-01-24 | 2013-07-10 | 傅宁芳 | Selective catalytic reduction (SCR) denitration system capable of increasing flue gas temperature by utilizing high-temperature steam |
| CN104324611A (en) * | 2014-10-29 | 2015-02-04 | 成都快典科技有限公司 | Flue gas SCR denitration system of thermal power plant |
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Application publication date: 20200303 |