CN109701380A - Application of the cyanuric acid in SCCR denitration and the SCCR denitrating technique method based on cyanuric acid - Google Patents
Application of the cyanuric acid in SCCR denitration and the SCCR denitrating technique method based on cyanuric acid Download PDFInfo
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- CN109701380A CN109701380A CN201811625907.1A CN201811625907A CN109701380A CN 109701380 A CN109701380 A CN 109701380A CN 201811625907 A CN201811625907 A CN 201811625907A CN 109701380 A CN109701380 A CN 109701380A
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- denitrfying agent
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Abstract
The present invention provides cyanuric acids in SCCR denitrating technique as the application of denitrfying agent.SCCR denitrating technique method based on cyanuric acid, comprising the following steps: the 1. thermal decomposition of cyanuric acid；2. thermal decomposition product sprays into cigarette tail gas；Thermal decomposition product carries out reaction as the NOx in denitrfying agent and cigarette tail gas to achieve the effect that remove NOx.The present invention is using cyanuric acid as denitrfying agent, denitration amplitude broad, denitration efficiency height.The wide position selection of the temperature of cyanuric acid denitrfying agent of the present invention is between 50 DEG C -1000 DEG C, the wide position of the temperature of cigarette tail gas is selected as from 20 DEG C -1000 DEG C, almost it is able to satisfy the denitration in all places, the denitration efficiency height of the technology is up to 95% or more, the technology does not have tail ammonia, does not have the subsequent secondary pollution problem of SCR and SNCR.
Description
Technical field
The application and urinated based on cyanogen that the invention belongs to gas denitrifying technology fields more particularly to cyanuric acid in SCCR denitration
The SCCR denitrating technique method of acid.
Background technique
Nitrogen oxides is one of coal fired power plant major pollutants discharged, and State Ministry of Environmental Protection implemented to issue on January 1st, 2012
" fossil-fuel power plant atmospheric pollutant emission standard " GB13223-2011 of cloth has adjusted pollutant emission limit, by nitrogen oxygen
The concentration of emission limit value of compound is uniformly determined as 100mg/m3, new-built unit executed the time from 2012, when old unit executes
Between from July, 2014, this concentration of emission limit value is required for national all regions.On the other hand, for the row of nitrogen oxides
Dirt charge has begun, and power plant need to be paid every year a large amount of nitrogen oxides blowdown expenses by discharge amount.
It is basically using the selective-catalytic-reduction denitrified technique of SCR(in denitration of boiler smoke technical field) and
SNCR(selective non-catalytic reduction denitrating technique) technology and the two combined use.It is compared with SCR technology, the SNCR of boiler
The advantages of gas denitrifying technology is that project cost is low, and system is simple, is suitble to old boiler denitration engineering reconstruction, the disadvantage is that phase
To lower denitration efficiency, the application of the technology is limited.The denitration efficiency of SNCR gas denitrifying technology is generally 30-
60%, it is influenced very greatly, to can be used as the supplement process of low NOx combusting technology by boiler structure size.SCR gas denitrifying technology denitration
Rate is high, and up to 90% or more, but initial investment is expensive.And there is subsequent secondary pollution in SCR and SNCR.
Summary of the invention
Aiming at the shortcomings in the prior art, the application and be based on cyanogen that it is an object of the invention to provide cyanuric acids in SCCR denitration
The SCCR denitrating technique method of uric acid；The present invention is using cyanuric acid as denitrfying agent, denitration amplitude broad, denitration efficiency height.This hair
The selection of the temperature of bright cyanuric acid denitrfying agent wide position between 50 DEG C -1000 DEG C, the wide position of the temperature of cigarette tail gas be selected as from 20 DEG C -
1000 DEG C, it is almost able to satisfy the denitration in all places, for the denitration efficiency height of the technology up to 95% or more, which does not have tail ammonia,
The subsequent secondary pollution problem of SCR and SNCR is not had.
Technical scheme is as follows:
First aspect present invention provides cyanuric acid in SCCR denitrating technique as the application of denitrfying agent.
Cyanuric acid in SCCR denitrating technique as denitrfying agent application in, cyanuric acid denitration amplitude broad, denitration efficiency 95%
More than.
Second aspect of the present invention provides the SCCR denitrating technique method based on cyanuric acid, comprising the following steps:
1. the thermal decomposition of cyanuric acid；
2. thermal decomposition product sprays into cigarette tail gas；Thermal decomposition product as the NOx in denitrfying agent and cigarette tail gas carry out reaction to
Achieve the effect that remove NOx.
Preferably, step 1. in, the wide position of temperature of the cyanuric acid denitrfying agent selected is 50 DEG C -1000 DEG C.
Preferably, step 2. in, the wide position of temperature of the cigarette tail gas selected is 20 DEG C -1000 DEG C.Due to light
Solution is effective, so the wide position of temperature can be applicable in for the cigarette tail gas from 20 DEG C -1000 DEG C and the wide position of temperature is from 50 DEG C -1000 DEG C
Cyanuric acid denitrfying agent can be applicable in.
In order to improve effective resolution ratio of cyanuric acid, preferably, step 1. in, the particle size parameters of cyanuric acid denitrfying agent are
100-1000 mesh, it is preferred that 600-1000 mesh.
In order to improve effective resolution ratio of cyanuric acid, preferably, step 1. in, the thermal decomposition temperature of cyanuric acid is 260-
450 DEG C, it is preferred that 350-400 DEG C.100% can be reached in the thermal decomposition efficiency of this range, cyanuric acid.
Preferably, step 2. in, thermal decomposition product and the thermal decomposition of NOx selecting response, one in photocatalysis Decomposition method
Kind or two kinds of combination.Since photodissociation is effective, so the wide position of temperature can be applicable in for the cigarette tail gas from 20 DEG C -1000 DEG C, and
The wide position of temperature can be applicable in the method from 50 DEG C -1000 DEG C of cyanuric acid denitrfying agent.
In order to improve the reaction efficiency of thermal decomposition product and NOx, preferably, step 2. in, wherein thermally decompose point
550 DEG C -1200 DEG C of the temperature of solution.
In order to improve the reaction efficiency of thermal decomposition product and NOx, preferably, step 2. in, light in photocatalysis Decomposition
Wavelength be 50-2450mm, it is preferred that 50-250mm.
Working principle: cyanuric acid carries out thermally decomposing to generate under the high temperature conditions isocyanic acid, isocyanic acid and NOx by hot point
The combination of solution, photocatalysis Decomposition or both is reacted, to achieve the effect that deviate from NOx；Since photodissociation is effective, so warm
Spending wide position is that can be applicable in from 20 DEG C -1000 DEG C of cigarette tail gas and the wide position of temperature is from 50 DEG C -1000 DEG C of cyanuric acid denitrfying agent
It can be applicable in；And since the efficiency of cyanuric acid thermal decomposition can reach 100%, because this person's decomposition product isocyanic acid and NOx are rear
Transformation efficiency can reach 95% or more under the conditions of continuous, it was demonstrated that denitration effect is extremely obvious.
The invention has the benefit that
The present invention is using cyanuric acid as denitrfying agent, denitration amplitude broad, denitration efficiency height.The temperature of cyanuric acid denitrfying agent of the present invention
Between 50 DEG C -1000 DEG C, the wide position of the temperature of cigarette tail gas is selected as from 20 DEG C -1000 DEG C, is almost able to satisfy all for wide position selection
The denitration in place, for the denitration efficiency height of the technology up to 95% or more, which does not have tail ammonia, does not have the subsequent of SCR and SNCR
Secondary pollution problem.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
It is low for project cost the advantages of the SNCR gas denitrifying technology of boiler as background technique is introduced, system letter
It is single, it is suitble to old boiler denitration engineering reconstruction, the disadvantage is that relatively low denitration efficiency, limits the applied field of the technology
It closes.The denitration efficiency of SNCR gas denitrifying technology is generally 30-60%, is influenced very greatly, to can be used as low NOx by boiler structure size
The supplement process of combustion technology.SCR gas denitrifying technology denitrification rate is high, and up to 90% or more, but initial investment is expensive.And
There is subsequent secondary pollution in SCR and SNCR.
The invention proposes cyanuric acid in SCCR denitrating technique as the application of denitrfying agent；Cyanuric acid denitration width
Degree is wide, 95% or more denitration efficiency.
The invention provides the SCCR denitrating technique method based on cyanuric acid, comprising the following steps:
1. the thermal decomposition of cyanuric acid；
2. thermal decomposition product sprays into cigarette tail gas；Thermal decomposition product as the NOx in denitrfying agent and cigarette tail gas carry out reaction to
Achieve the effect that remove NOx.
Step 1. in, the wide position of temperature of the cyanuric acid denitrfying agent selected is 50 DEG C -1000 DEG C.Step 2. in, selection
The cigarette tail gas the wide position of temperature be 20 DEG C -1000 DEG C.Since photodissociation is effective, thus the wide position of temperature be from 20 DEG C-
1000 DEG C of cigarette tail gas can be applicable in and the wide position of temperature can be applicable in from 50 DEG C -1000 DEG C of cyanuric acid denitrfying agent.
In order to improve effective resolution ratio of cyanuric acid, step 1. in, the particle size parameters of cyanuric acid denitrfying agent are 100-1000
Mesh, it is preferred that 600-1000 mesh.Step 1. in, the thermal decomposition temperature of cyanuric acid is 260-450 DEG C, it is preferred that 350-400 DEG C.
100% can be reached in the thermal decomposition efficiency of this range, cyanuric acid.
Step 2. in, thermal decomposition product and the thermal decomposition of NOx selecting response, one or both of photocatalysis Decomposition method
Combination.Since photodissociation is effective, thus the wide position of temperature be can be applicable in from 20 DEG C -1000 DEG C of cigarette tail gas and the wide position of temperature from
50 DEG C -1000 DEG C of cyanuric acid denitrfying agent can be applicable in the method.
In order to improve the reaction efficiency of thermal decomposition product and NOx, step 2. in, wherein the temperature of the decomposition thermally decomposed
550℃-1200℃.Step 2. in, in photocatalysis Decomposition the wavelength of light be 50-2450mm, it is preferred that 50-250mm.
Working principle: cyanuric acid carries out thermally decomposing to generate under the high temperature conditions isocyanic acid, isocyanic acid and NOx by hot point
The combination of solution, photocatalysis Decomposition or both is reacted, to achieve the effect that deviate from NOx；Since photodissociation is effective, so warm
Spending wide position is that can be applicable in from 20 DEG C -1000 DEG C of cigarette tail gas and the wide position of temperature is from 50 DEG C -1000 DEG C of cyanuric acid denitrfying agent
It can be applicable in；And since the efficiency of cyanuric acid thermal decomposition can reach 100%, because this person's decomposition product isocyanic acid and NOx are rear
Transformation efficiency can reach 95% or more under the conditions of continuous, it was demonstrated that denitration effect is extremely obvious.
In order to enable those skilled in the art can clearly understand the technical solution of the application, below with reference to tool
The technical solution of the application is described in detail in the embodiment of body.
Test material used in the embodiment of the present invention is the test material of this field routine, can pass through commercial channel
It is commercially available.
Embodiment 1: the SCCR denitrating technique method based on cyanuric acid, comprising the following steps:
1. the thermal decomposition of cyanuric acid；2. thermal decomposition product sprays into cigarette tail gas；Thermal decomposition product is as in denitrfying agent and cigarette tail gas
NOx carry out reaction to achieve the effect that remove NOx.
Step 1. in, the wide position of temperature of the cyanuric acid denitrfying agent selected is 50 DEG C.Step 2. in, the institute of selection
The wide position of temperature for stating cigarette tail gas is 20 DEG C.Since photodissociation is effective, step 1. in, the particle size parameters of cyanuric acid denitrfying agent are 600 mesh.
Step 1. in, the thermal decomposition temperature of cyanuric acid is 350 DEG C.The thermal decomposition efficiency of cyanuric acid can reach 98%.Step 2. in,
Thermal decomposition product and NOx selecting response photocatalysis Decomposition method.Step 2. in, in photocatalysis Decomposition the wavelength of light be 50mm.NOx
Transformation efficiency 95%.
Embodiment 2: the SCCR denitrating technique method based on cyanuric acid, comprising the following steps:
1. the thermal decomposition of cyanuric acid；2. thermal decomposition product sprays into cigarette tail gas；Thermal decomposition product is as in denitrfying agent and cigarette tail gas
NOx carry out reaction to achieve the effect that remove NOx.
Step 1. in, the wide position of temperature of the cyanuric acid denitrfying agent selected is 1000 DEG C.Step 2. in, selection it is described
The wide position of temperature of the cigarette tail gas is 1000 DEG C.Step 1. in, the particle size parameters of cyanuric acid denitrfying agent are 1000 mesh.Step is 1.
In, the thermal decomposition temperature of cyanuric acid is 400 DEG C.The thermal decomposition efficiency of cyanuric acid can reach 100%.Step 2. in, thermal decomposition
Product and NOx selecting response thermolysis process.Step 2. in, wherein 1000 DEG C of the temperature of the decomposition thermally decomposed.NOx conversion efficiency
97%。
Embodiment 3: the SCCR denitrating technique method based on cyanuric acid, comprising the following steps:
1. the thermal decomposition of cyanuric acid；2. thermal decomposition product sprays into cigarette tail gas；Thermal decomposition product is as in denitrfying agent and cigarette tail gas
NOx carry out reaction to achieve the effect that remove NOx.
Step 1. in, the wide position of temperature of the cyanuric acid denitrfying agent selected is 500 DEG C.Step 2. in, selection it is described
The wide position of temperature of the cigarette tail gas is 300 DEG C.Step 1. in, the particle size parameters of cyanuric acid denitrfying agent are 700 mesh.Step 1. in,
The thermal decomposition temperature of cyanuric acid is 400 DEG C.100% can be reached in the thermal decomposition efficiency of this range, cyanuric acid.Step 2. in,
Thermal decomposition product and the thermal decomposition of NOx selecting response, two kinds of photocatalysis Decomposition of combination.Step 2. in, wherein the decomposition thermally decomposed
550 DEG C of temperature.Step 2. in, in photocatalysis Decomposition the wavelength of light be 250mm.NOx conversion efficiency 98%.
Certainly, above description is also not limited to the example above, technical characteristic of the present invention without description can by or
It is realized using the prior art, details are not described herein；It is not to this that the above examples are only used to illustrate the technical scheme of the present invention
The limitation of invention, describes the invention in detail referring to preferred embodiment, and those skilled in the art should
Understand, the variations, modifications, additions or substitutions that those skilled in the art are made within the essential scope of the present invention
Without departure from spirit of the invention, it also should belong to claims of the invention.
Claims (10)
1. cyanuric acid is in SCCR denitrating technique as the application of denitrfying agent.
2. cyanuric acid is in SCCR denitrating technique as the application of denitrfying agent, it is characterised in that: cyanuric acid denitration amplitude broad, denitration
95% or more efficiency.
3. the SCCR denitrating technique method based on cyanuric acid, it is characterised in that: the following steps are included:
1. the thermal decomposition of cyanuric acid；
2. thermal decomposition product sprays into cigarette tail gas；Thermal decomposition product as the NOx in denitrfying agent and cigarette tail gas carry out reaction to
Achieve the effect that remove NOx.
4. the SCCR denitrating technique method according to claim 3 based on cyanuric acid, it is characterised in that:
Step 1. in, the wide position of temperature of the cyanuric acid denitrfying agent selected is 50 DEG C -1000 DEG C.
5. the SCCR denitrating technique method according to claim 3 based on cyanuric acid, it is characterised in that:
Step 2. in, the wide position of temperature of the cigarette tail gas selected is 20 DEG C -1000 DEG C.
6. the SCCR denitrating technique method according to claim 3 based on cyanuric acid, it is characterised in that: step 1. in, cyanogen
The particle size parameters of uric acid denitrfying agent are 100-1000 mesh, it is preferred that 600-1000 mesh.
7. the SCCR denitrating technique method according to claim 3 based on cyanuric acid, it is characterised in that: step 1. in, cyanogen
The thermal decomposition temperature of uric acid is 260-450 DEG C, it is preferred that 350-400 DEG C.
8. the SCCR denitrating technique method according to claim 3 based on cyanuric acid, it is characterised in that:
Step 2. in, the group of thermal decomposition product and the thermal decomposition of NOx selecting response, one or both of photocatalysis Decomposition method
It closes.
9. the SCCR denitrating technique method according to claim 8 based on cyanuric acid, it is characterised in that:
Step 2. in, wherein 550 DEG C -1200 DEG C of the temperature of the decomposition thermally decomposed.
10. the SCCR denitrating technique method according to claim 8 based on cyanuric acid, it is characterised in that:
Step 2. in, in photocatalysis Decomposition the wavelength of light be 50-2450mm, it is preferred that 50-250mm.
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| CN201811625907.1A CN109701380A (en) | 2018-12-28 | 2018-12-28 | Application of the cyanuric acid in SCCR denitration and the SCCR denitrating technique method based on cyanuric acid |
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| CN201811625907.1A CN109701380A (en) | 2018-12-28 | 2018-12-28 | Application of the cyanuric acid in SCCR denitration and the SCCR denitrating technique method based on cyanuric acid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113262631A (en) * | 2021-05-21 | 2021-08-17 | 浙江兴利盛环保设备有限公司 | Nano denitration agent, preparation method and denitration method |
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|---|---|---|---|---|
| US4886650A (en) * | 1986-05-05 | 1989-12-12 | Robert Perry | No reduction using sublimation of cyanuric acid |
| JPH02191524A (en) * | 1988-10-13 | 1990-07-27 | Kiyouseki Seihin Gijutsu Kenkyusho:Kk | Method for removing nitrogen oxide |
| EP0643668A1 (en) * | 1991-08-26 | 1995-03-22 | Cummins Power Generation, Inc. | PROCESS AND APPARATUS FOR REMOVING NO x? FROM EXHAUST GASES USING CYANURIC ACID-------------------------------------------------- |
| CN104874270A (en) * | 2015-05-05 | 2015-09-02 | 北京环科腾越环保工程有限公司 | Method and system for denitration by adopting isocyanic acid gas |
| CN107297144A (en) * | 2017-08-17 | 2017-10-27 | 山东大明消毒科技有限公司 | A kind of desulfurization denitrification agent and its preparation method and application |
-
2018
- 2018-12-28 CN CN201811625907.1A patent/CN109701380A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4886650A (en) * | 1986-05-05 | 1989-12-12 | Robert Perry | No reduction using sublimation of cyanuric acid |
| JPH02191524A (en) * | 1988-10-13 | 1990-07-27 | Kiyouseki Seihin Gijutsu Kenkyusho:Kk | Method for removing nitrogen oxide |
| EP0643668A1 (en) * | 1991-08-26 | 1995-03-22 | Cummins Power Generation, Inc. | PROCESS AND APPARATUS FOR REMOVING NO x? FROM EXHAUST GASES USING CYANURIC ACID-------------------------------------------------- |
| CN104874270A (en) * | 2015-05-05 | 2015-09-02 | 北京环科腾越环保工程有限公司 | Method and system for denitration by adopting isocyanic acid gas |
| CN107297144A (en) * | 2017-08-17 | 2017-10-27 | 山东大明消毒科技有限公司 | A kind of desulfurization denitrification agent and its preparation method and application |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113262631A (en) * | 2021-05-21 | 2021-08-17 | 浙江兴利盛环保设备有限公司 | Nano denitration agent, preparation method and denitration method |
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