CN108939892A - Cement decomposing furnace lower cone gametic fertility system - Google Patents
Cement decomposing furnace lower cone gametic fertility system Download PDFInfo
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- CN108939892A CN108939892A CN201810802107.6A CN201810802107A CN108939892A CN 108939892 A CN108939892 A CN 108939892A CN 201810802107 A CN201810802107 A CN 201810802107A CN 108939892 A CN108939892 A CN 108939892A
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- Prior art keywords
- water spray
- ammonia
- ammonia water
- spray gun
- combustion apparatus
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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
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
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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
- B01D53/54—Nitrogen compounds
- B01D53/56—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)
- 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)
Abstract
The present embodiments relate to a kind of cement decomposing furnace lower cone gametic fertility systems, comprising: ammonia water spray equipment and dore furnace combustion apparatus；The ammonia water spray equipment includes: ammonium hydroxide preparation tank (1), flow control valve (2), flowmeter (3), defeated ammonia pump (4) and the ammonia spraying amount automatic control unit (5) for passing sequentially through pipeline connection；The dore furnace combustion apparatus includes: to set gradually to decompose furnace body (6), tertiary-air pipe (7), gas inlet (8) and ammonia water spray gun (9)；Wherein, the ammonia spraying amount automatic control unit (5) is connect with the ammonia water spray gun (9) by pipeline.It may be implemented to improve denitration efficiency and ammonia utilization rate, substantially reduce cement kiln NOxDischarge and reduce thermal NOxIt generates, finally realizes NOxMinimum discharge.
Description
Technical field
The present embodiments relate to cement decomposing furnace lower cone gametic fertility system and devices more particularly to a kind of cement point
Solve furnace lower cone gametic fertility system.
Background technique
Environmental pollution is on the rise, the continuous improvement that Environmental protection requires.Industrial Boiler NOx emission is main big
One of the major source of gas pollution." the cement industry atmosphere pollutants emission standards " that China in 2013 promulgates provide newly-built enterprise
Since on March 1st, 2014, existing enterprise 400mg/m is executed since on July 1st, 20153Nitrogen oxide pollutant discharge
Limit value, just to existing dore furnace low-NO_x combustion technology, more stringent requirements are proposed for this.
It is widely used at present, the mature low NO of cement decomposing furnacexTechnology, such as furnace air classification, fuel staging, the combustion of low nitrogen
Burner etc., these technologies must tie tail denitrating flue gas (such as selective catalytic reduction (SCR) and selective non-catalytic reduction
(SNCR) etc.) just it is able to satisfy national standard (GB4915-2013).SCR and SNCR technology is by spraying into ammonia reduction into flue gas
Agent restores NOx, SNCR technology there are reaction temperature windows it is relatively narrow, the escaping of ammonia is serious the problems such as, that there are catalyst lifes is short by SCR,
The unfavorable factors such as boiler efficiency reduces, flue blockage and installation and operation are at high cost, in application also by larger limitation.Cause
This, there is an urgent need to research and develop, low operating cost, denitration efficiency be high, low NO of strong applicabilityxPulverized coal combustion meets market need
It wants.
However, in the prior art, since dore furnace middle and high concentration calcium oxide powder is to NH3Gas restores the inhibition of NOx, so that
SNCR efficiency is difficult to be promoted, and lacks new technique to reduce NOxScheme.
Summary of the invention
The embodiment of the invention provides a kind of cement decomposing furnace lower cone gametic fertility system, may be implemented to improve denitration effect
Rate and ammonia utilization rate, substantially reduce cement kiln NOxDischarge and reduce thermal NOxIt generates, finally realizes NOxMinimum discharge.
In a first aspect, the embodiment of the invention provides a kind of cement decomposing furnace lower cone gametic fertility systems, comprising:
Ammonia water spray equipment and dore furnace combustion apparatus；
The ammonia water spray equipment includes: the ammonium hydroxide preparation tank 1 for passing sequentially through pipeline connection, flow control valve 2, flowmeter
3, defeated ammonia pump 4 and ammonia spraying amount automatic control unit 5；
The dore furnace combustion apparatus includes: to set gradually to decompose furnace body 6, tertiary-air pipe 7, gas inlet 8 and ammonia
Water spray gun 9；
Wherein, the ammonia spraying amount automatic control unit 5 is connect with the ammonia water spray gun 9 by pipeline.
In a possible embodiment, the wind speed setting of the gas inlet 8 are as follows: 30~40m/s.
In a possible embodiment, the ammonia water spray gun 9 is fired in symmetrical and spaced set in the dore furnace
At the furnace body outer wall for burning equipment.
In a possible embodiment, the quantity of the ammonia water spray gun 9 is 4.
In a possible embodiment, the ammonia water spray gun 9 designs for mechanical atomization.
In a possible embodiment, the pressure high speed that the ammonia water spray gun 9 is provided by the defeated ammonia pump 4 is injected
In the dore furnace combustion apparatus in ascending air.
In a possible embodiment, it is in the 9 region oxygen amount of the ammonia water spray gun of the dore furnace combustion apparatus
1%~2%.
Cement decomposing furnace lower cone gametic fertility system provided in an embodiment of the present invention makes ammonium hydroxide, easy construction
And without geographical restrictions, utilization is at low cost.Ammonium hydroxide fuel is a kind of more clean fuel, in lower cone high-temperature low-oxygen environment
In, NH that ammonium hydroxide is quickly precipitated3NO in gas and the flue gas of rotary kiln inputxReduction reaction occurs for mixing, avoids high in dore furnace
Concentration calcium oxide powder is to NH3Gas restores NOxInhibition substantially reduce cement kiln to improve denitration efficiency and ammonia utilization rate
NOxDischarge and reduce thermal NOxIt generates, finally realizes NOxMinimum discharge.
Detailed description of the invention
Fig. 1 is that the embodiment of the invention provides a kind of structural schematic diagrams of cement decomposing furnace lower cone gametic fertility system；
Fig. 2 is that the embodiment of the invention provides spray gun cross-sectional structure schematic diagrames.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In order to facilitate understanding of embodiments of the present invention, it is further explained below in conjunction with attached drawing with specific embodiment
Bright, embodiment does not constitute the restriction to the embodiment of the present invention.
Fig. 1 be the embodiment of the invention provides a kind of structural schematic diagram of cement decomposing furnace lower cone gametic fertility system,
As shown in Figure 1, the system includes:
Ammonia water spray equipment and dore furnace combustion apparatus；
The ammonia water spray equipment includes: the ammonium hydroxide preparation tank 1 for passing sequentially through pipeline connection, flow control valve 2, flowmeter
3, defeated ammonia pump 4 and ammonia spraying amount automatic control unit 5；
The dore furnace combustion apparatus includes: to set gradually to decompose furnace body 6, tertiary-air pipe 7, gas inlet 8 and ammonia
Water spray gun 9；
Wherein, the ammonia spraying amount automatic control unit 5 is connect with the ammonia water spray gun 9 by pipeline.
Specifically, the ammonium hydroxide preparation tank 1 is used to ammonia and water being mixed and made into ammonia spirit.
Optionally, the wind speed setting of the gas inlet 8 are as follows: 30~40m/s.
Optionally, the ammonia water spray gun 9 is in symmetrical and spaced set in the furnace body outer wall of the dore furnace combustion apparatus
Place.
Optionally, the quantity of the ammonia water spray gun 9 is 4.
Optionally, the ammonia water spray gun 9 designs for mechanical atomization.
Optionally, the pressure high speed that the ammonia water spray gun 9 is provided by the defeated ammonia pump 4 is injected the dore furnace burning and is set
In standby interior ascending air.
It optionally, is 1%~2% in the 9 region oxygen amount of the ammonia water spray gun of the dore furnace combustion apparatus.
The principle of the cement decomposing furnace lower cone gametic fertility system of the present embodiment are as follows: the ammonia in ammonium hydroxide preparation tank is defeated
After out and water is mixed with ammonia spirit, inputs ammonia water spray gun by defeated ammonia pump, sprays into position at lower cone position.In lower cone
In high-temperature low-oxygen environment, NH that ammonium hydroxide is quickly precipitated3NO in gas and the flue gas of rotary kiln inputxReduction reaction occurs for mixing, keeps away
Exempt from dore furnace middle and high concentration calcium oxide powder to NH3Gas restores NOxInhibition, to improve denitration efficiency and ammonia utilization rate, significantly
Reduce cement kiln NOxDischarge.Under high-temperature low-oxygen environment, reaction (formula 1) is suppressed, and reaction (formula 2) carries out more
It is thorough:
4NH3+5O2→4NO+6H2O(1)
4NH3+6NO→5N2+6H2O(2)
8 air quantity of gas inlet is directly inputted by rotary kiln, and decomposition furnace bottom lower cone import wind speed is 30~40m/s, should
Air-flow is conducive to optimization burner hearth entirety flow field, avoids localized hyperthermia, while advantageously reducing NOxConcentration.It will be in ammonium hydroxide preparation tank
It is mixed with ammonia spirit with water after ammonia output, ammonia water spray gun is inputted by defeated ammonia pump, position is sprayed at lower cone position, is somebody's turn to do
Region oxygen amount is about 1%~2%, and temperature is to arrange that 4 spray guns are located at furnace body in same absolute altitude between 1000~1200 DEG C
Wall surface equidistant, is symmetric, and spray gun layout drawing is as shown in Figure 2.Low NOxAmmonia water spray gun 9 on burner is using mechanical mist
Change, and be not necessarily to air distribution, the pressure high speed provided by defeated ammonia pump 4 is injected in furnace in ascending air, and ammonium hydroxide is in high temperature, hypoxia condition
Lower fast decoupled, and with the NO that is generated in flue gasxReduction reaction occurs.
Cement decomposing furnace lower cone gametic fertility system provided in an embodiment of the present invention makes ammonium hydroxide, easy construction
And without geographical restrictions, utilization is at low cost.Ammonium hydroxide fuel is a kind of more clean fuel, in lower cone high-temperature low-oxygen environment
In, NH that ammonium hydroxide is quickly precipitated3NO in gas and the flue gas of rotary kiln inputxReduction reaction occurs for mixing, avoids high in dore furnace
Concentration calcium oxide powder is to NH3Gas restores NOxInhibition substantially reduce cement kiln to improve denitration efficiency and ammonia utilization rate
NOxDischarge and reduce thermal NOxIt generates, finally realizes NOxMinimum discharge.
Professional should further appreciate that, described in conjunction with the examples disclosed in the embodiments of the present disclosure
Unit and algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, hard in order to clearly demonstrate
The interchangeability of part and software generally describes each exemplary composition and step according to function in the above description.
These functions are implemented in hardware or software actually, the specific application and design constraint depending on technical solution.
Professional technician can use different methods to achieve the described function each specific application, but this realization
It should not be considered as beyond the scope of the present invention.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (7)
1. a kind of cement decomposing furnace lower cone gametic fertility system characterized by comprising
Ammonia water spray equipment and dore furnace combustion apparatus；
The ammonia water spray equipment includes: the ammonium hydroxide preparation tank (1) for passing sequentially through pipeline connection, flow control valve (2), flowmeter
(3), defeated ammonia pump (4) and ammonia spraying amount automatic control unit (5)；
The dore furnace combustion apparatus include: set gradually decompose furnace body (6), tertiary-air pipe (7), gas inlet (8) and
Ammonia water spray gun (9)；
Wherein, the ammonia spraying amount automatic control unit (5) is connect with the ammonia water spray gun (9) by pipeline.
2. system according to claim 1, which is characterized in that the wind speed of the gas inlet (8) is arranged are as follows: 30~40m/
s。
3. system according to claim 1, which is characterized in that the ammonia water spray gun (9) in symmetrical and spaced set in
At the furnace body outer wall of the dore furnace combustion apparatus.
4. system according to claim 3, which is characterized in that the quantity of the ammonia water spray gun (9) is 4.
5. system according to claim 1, which is characterized in that the ammonia water spray gun (9) is designed for mechanical atomization.
6. system according to claim 1, which is characterized in that the ammonia water spray gun (9) is provided by the defeated ammonia pump (4)
Pressure high speed inject in the dore furnace combustion apparatus in ascending air.
7. system according to claim 1, which is characterized in that in the ammonia water spray gun of the dore furnace combustion apparatus
(9) region oxygen amount is 1%~2%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810802107.6A CN108939892A (en) | 2018-07-20 | 2018-07-20 | Cement decomposing furnace lower cone gametic fertility system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810802107.6A CN108939892A (en) | 2018-07-20 | 2018-07-20 | Cement decomposing furnace lower cone gametic fertility system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108939892A true CN108939892A (en) | 2018-12-07 |
Family
ID=64497627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810802107.6A Pending CN108939892A (en) | 2018-07-20 | 2018-07-20 | Cement decomposing furnace lower cone gametic fertility system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113694704A (en) * | 2021-09-03 | 2021-11-26 | 浙江省生态环境科学设计研究院 | Self-denitration and SNCR denitration system and method for cement kiln flue gas decomposition furnace |
| CN114788988A (en) * | 2022-05-16 | 2022-07-26 | 山东棱角建材科技有限公司 | SNCR (selective non-catalytic reduction) accurate denitration process for clinker production line |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102806003A (en) * | 2012-08-22 | 2012-12-05 | 清华大学 | SNCR (selective non-catalytic reduction) denitration device and method for rotary cement kiln |
-
2018
- 2018-07-20 CN CN201810802107.6A patent/CN108939892A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102806003A (en) * | 2012-08-22 | 2012-12-05 | 清华大学 | SNCR (selective non-catalytic reduction) denitration device and method for rotary cement kiln |
Non-Patent Citations (1)
| Title |
|---|
| 毛志伟，程群编著: "《氮氧化物减排》", 31 August 2014, 中国建材工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113694704A (en) * | 2021-09-03 | 2021-11-26 | 浙江省生态环境科学设计研究院 | Self-denitration and SNCR denitration system and method for cement kiln flue gas decomposition furnace |
| CN113694704B (en) * | 2021-09-03 | 2024-06-04 | 浙江省生态环境科学设计研究院 | System and method for self-denitration combined with SNCR denitration of cement kiln flue gas decomposing furnace |
| CN114788988A (en) * | 2022-05-16 | 2022-07-26 | 山东棱角建材科技有限公司 | SNCR (selective non-catalytic reduction) accurate denitration process for clinker production line |
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Application publication date: 20181207 |
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