CN106731565A - Novel SCR low-temperature denitration device - Google Patents
Novel SCR low-temperature denitration device Download PDFInfo
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- CN106731565A CN106731565A CN201611034262.5A CN201611034262A CN106731565A CN 106731565 A CN106731565 A CN 106731565A CN 201611034262 A CN201611034262 A CN 201611034262A CN 106731565 A CN106731565 A CN 106731565A
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- ammonia
- import
- benitration reactor
- denitration
- pretreatment unit
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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
- B01D53/75—Multi-step processes
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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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
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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
- B01D53/8631—Processes characterised by a specific device
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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
- B01D53/869—Multiple step processes
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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
- B01D53/90—Injecting reactants
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (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)
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses a kind of Novel SCR low-temperature denitration device, including：Blender, for the mixing of ammonia and air；Spray ammonia interface, the mixed gas for conveying ammonia and air；Pretreatment unit, a small amount of sulfurous amine salt particulate matter for intercepting the dust in flue gas and generation；First Benitration reactor, for the pretreated ammonia flue gas mixed gas of denitration process；Second Benitration reactor, for the pretreated ammonia flue gas mixed gas of denitration process；The outlet of blender is connected with the import of spray ammonia interface, and the outlet for spraying ammonia interface is connected with the import of pretreatment unit, and the outlet of pretreatment unit is connected with the import of the first Benitration reactor and the import of the second Benitration reactor respectively.The present invention is low-temperature catalyzed, and denitration efficiency can reach more than 85%, and high degree of automation, strong adaptability, high financial profit, non-secondary pollution thing is produced.
Description
Technical field
The present invention relates to denitrating flue gas field, more particularly to a kind of Novel SCR low-temperature denitration device.
Background technology
Flue gas is one of predominant emissions of steam power plant, by combustible in burner（That is boiler）Middle burning is produced.By
Substantial amounts of nitrogen oxides NO is usually contained in flue gasX（Such as NO）If these nitrogen oxides are directly discharged in air, can lead
The acid rain for causing corrosivity very strong, therefore flue gas has to pass through denitrogenation before discharge（That is denitration）Treatment.
At present, mainly there are two kinds with the gas denitrifying technology of comparative maturity：SCR（SCR）Technique and choosing
The non-catalytic reduction denitration of selecting property（SNCR）Technique.What the chemical principle of SCR and SNCR denitrating techniques was just as, be all
By denitrfying agent（Urea or ammonia）With smoke contacts, make the NO in denitrfying agent and flue gasXCarry out Chemoselective reduction generation nitrogen
Gas（N2）And vapor（H2O）.It is combustion zone in the burner hearth of boiler that SNCR techniques are general（800-1250℃）Inside carry out.SCR
Technique is then that beds are set in flue, at a temperature of 90-180 DEG C, cigarette is carried out under conditions of catalyst presence
The catalytic selectivity reduction reaction of gas.
SNCR and SCR cut both ways.The advantage of SNCR is not need expensive beds, has the disadvantage to take off
Nitre effect is poor, and denitration rate is usually no more than 40%.The shortcoming of SCR is then to need to use expensive catalyst bed, and
Need enough spaces to set beds, advantage is then good denitration effect, and denitration rate can reach more than 85%.
The content of the invention
It is low-temperature catalyzed the present invention solves the technical problem of a kind of Novel SCR low-temperature denitration device is provided, denitration effect
Rate can reach more than 85%, and strong adaptability, high financial profit, non-secondary pollution thing is produced.
In order to solve the above technical problems, one aspect of the present invention is：A kind of Novel SCR low-temperature denitration is provided
Device, including：
Blender, for the mixing of ammonia and air；
Spray ammonia interface, the mixed gas for conveying ammonia and air；
Pretreatment unit, a small amount of sulfurous amine salt particulate matter for intercepting the dust in flue gas and generation；
First Benitration reactor, for the pretreated ammonia flue gas mixed gas of denitration process；
Second Benitration reactor, for the pretreated ammonia flue gas mixed gas of denitration process；
The outlet of blender is connected with the import of spray ammonia interface, and the outlet for spraying ammonia interface is connected with the import of pretreatment unit
Logical, the outlet of pretreatment unit is connected with the import of the first Benitration reactor and the import of the second Benitration reactor respectively.
In a preferred embodiment of the present invention, the bottom in described pretreatment unit is provided with thiamines silk screen filter
Device.
In a preferred embodiment of the present invention, the first described Benitration reactor is SCR denitration reactor.
In a preferred embodiment of the present invention, the second described Benitration reactor is SCR denitration reactor.
The beneficial effects of the invention are as follows：The present invention is low-temperature catalyzed, and denitration efficiency can reach more than 80%, strong adaptability, energy
Enough be well adapted for exhaust gas volumn fluctuation and flue-gas temperature 90-200 DEG C change wide fluctuations situation, high financial profit,
Non-secondary pollution thing is produced.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will make needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing, wherein：
Fig. 1 is the structural representation of Novel SCR low-temperature denitration device one of the invention preferred embodiment；
The mark of each part is as follows in accompanying drawing：1st, blender, 2, spray ammonia interface, 3, pretreatment unit, the 4, first Benitration reactor,
5th, the second Benitration reactor, 6, ammonia storage bottle, 7, blower fan.
Specific embodiment
The technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, this area is common
All other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model of present invention protection
Enclose.
Fig. 1 is referred to, the embodiment of the present invention includes：
A kind of Novel SCR low-temperature denitration device, including：
Blender 1, for the mixing of ammonia and air；
Spray ammonia interface 2, the mixed gas for conveying ammonia and air；
Pretreatment unit 3, a small amount of sulfurous amine salt particulate matter for intercepting the dust in flue gas and generation；
First Benitration reactor 4, for the pretreated ammonia flue gas mixed gas of denitration process；
Second Benitration reactor 5, for the pretreated ammonia flue gas mixed gas of denitration process；
The outlet of blender 1 is connected with the import of spray ammonia interface 2, sprays the outlet of ammonia interface 2 and the import phase of pretreatment unit 3
Connection, the outlet of pretreatment unit 3 is connected with the import of the first Benitration reactor 4 and the import of the second Benitration reactor 5 respectively
It is logical.
In the present invention, the bottom in described pretreatment unit 3 is provided with thiamines wire gauzee filter.
In the present invention, the first described Benitration reactor 4 is SCR denitration reactor.
In the present invention, the second described Benitration reactor 5 is SCR denitration reactor.
Technical process：Air of the ammonia from ammonia storage bottle 6 out first and in blower fan 7 out, blended device 1 is well mixed
After be transported to spray ammonia interface 2, it is abundant that pending flue gas conveys the ammonia air Mixture that comes in mixation tube section and spray ammonia interface 2
Pretreatment unit 3 is transported to after mixing, the sulfur dioxide in flue gas generates the particulate matters such as sulfurous amine salt with ammonia reaction, is locating in advance
In the presence of reason device 3, the particulate matter such as a small amount of sulfurous amine salt of dust and generation in flue gas is pretreated thiamines silk screen filter
Device is intercepted, and pretreated ammonia flue gas mixed gas enter back into the first Benitration reactor 4 and the second Benitration reactor 5 and carry out denitration
Treatment.In the presence of denitrating catalyst, the nitrogen oxides in flue gas will fully react with ammonia, generate nitrogen and water, treatment
Clean flue gas afterwards are discharged through aiutage.
The beneficial effect of Novel SCR low-temperature denitration device of the invention is：The present invention is low-temperature catalyzed, and denitration efficiency can reach
To more than 85%, strong adaptability, can be well adapted for exhaust gas volumn fluctuation and flue-gas temperature changes on a large scale at 90-180 DEG C
Fluctuation situation, high financial profit, non-secondary pollution thing is produced.
Embodiments of the invention are the foregoing is only, the scope of the claims of the invention is not thereby limited, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright description is made, or directly or indirectly it is used in other related technology necks
Domain, is included within the scope of the present invention.
Claims (4)
1. a kind of Novel SCR low-temperature denitration device, it is characterised in that including：
Blender, for the mixing of ammonia and air；
Spray ammonia interface, the mixed gas for conveying ammonia and air；
Pretreatment unit, a small amount of sulfurous amine salt particulate matter for intercepting the dust in flue gas and generation；
First Benitration reactor, for the pretreated ammonia flue gas mixed gas of denitration process；
Second Benitration reactor, for the pretreated ammonia flue gas mixed gas of denitration process；
The outlet of blender is connected with the import of spray ammonia interface, and the outlet for spraying ammonia interface is connected with the import of pretreatment unit
Logical, the outlet of pretreatment unit is connected with the import of the first Benitration reactor and the import of the second Benitration reactor respectively.
2. Novel SCR low-temperature denitration device according to claim 1, it is characterised in that in described pretreatment unit
Bottom is provided with thiamines wire gauzee filter.
3. Novel SCR low-temperature denitration device according to claim 1, it is characterised in that the first described Benitration reactor
It is SCR denitration reactor.
4. Novel SCR low-temperature denitration device according to claim 1, it is characterised in that the second described Benitration reactor
It is SCR denitration reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611034262.5A CN106731565A (en) | 2016-11-23 | 2016-11-23 | Novel SCR low-temperature denitration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611034262.5A CN106731565A (en) | 2016-11-23 | 2016-11-23 | Novel SCR low-temperature denitration device |
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| Publication Number | Publication Date |
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| CN106731565A true CN106731565A (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611034262.5A Pending CN106731565A (en) | 2016-11-23 | 2016-11-23 | Novel SCR low-temperature denitration device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107243236A (en) * | 2017-08-09 | 2017-10-13 | 成都中祥天宇环保科技有限公司 | A kind of denitration reaction system suitable for low-temperature flue gas |
Citations (6)
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|---|---|---|---|---|
| WO2010105778A1 (en) * | 2009-03-20 | 2010-09-23 | Uhde Gmbh | Combined waste gas treatment of waste gas streams containing ammonia and nitrogen oxides in industrial plants |
| CN103657400A (en) * | 2012-09-24 | 2014-03-26 | 张继惟 | Integrated engineering system for purifying flue gas by LSCO (low-temperature selectivity catalytic oxygen) |
| CN205055813U (en) * | 2015-08-14 | 2016-03-02 | 四川纬远科技有限公司 | Low temperature SCR denitrification facility |
| CN105617858A (en) * | 2016-01-15 | 2016-06-01 | 环境保护部华南环境科学研究所 | Combined synergetic deep purification process for multiple pollutants in flue gas |
| CN105688936A (en) * | 2016-01-20 | 2016-06-22 | 西南化工研究设计院有限公司 | In-situ regeneration method of ammonium sulfate poisoning denitration catalyst |
| CN206315654U (en) * | 2016-11-23 | 2017-07-11 | 无锡市国松环保机械有限公司 | Novel SCR low-temperature denitration device |
-
2016
- 2016-11-23 CN CN201611034262.5A patent/CN106731565A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010105778A1 (en) * | 2009-03-20 | 2010-09-23 | Uhde Gmbh | Combined waste gas treatment of waste gas streams containing ammonia and nitrogen oxides in industrial plants |
| CN103657400A (en) * | 2012-09-24 | 2014-03-26 | 张继惟 | Integrated engineering system for purifying flue gas by LSCO (low-temperature selectivity catalytic oxygen) |
| CN205055813U (en) * | 2015-08-14 | 2016-03-02 | 四川纬远科技有限公司 | Low temperature SCR denitrification facility |
| CN105617858A (en) * | 2016-01-15 | 2016-06-01 | 环境保护部华南环境科学研究所 | Combined synergetic deep purification process for multiple pollutants in flue gas |
| CN105688936A (en) * | 2016-01-20 | 2016-06-22 | 西南化工研究设计院有限公司 | In-situ regeneration method of ammonium sulfate poisoning denitration catalyst |
| CN206315654U (en) * | 2016-11-23 | 2017-07-11 | 无锡市国松环保机械有限公司 | Novel SCR low-temperature denitration device |
Non-Patent Citations (1)
| Title |
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| 李丽等: "《燃煤电厂SCR脱硝催化剂评价与再生》", 31 July 2015, 中国电力出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107243236A (en) * | 2017-08-09 | 2017-10-13 | 成都中祥天宇环保科技有限公司 | A kind of denitration reaction system suitable for low-temperature flue gas |
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Application publication date: 20170531 |