CN107014946A - A kind of SCR denitration device ammonia consumption computational methods - Google Patents
A kind of SCR denitration device ammonia consumption computational methods Download PDFInfo
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- CN107014946A CN107014946A CN201710291559.8A CN201710291559A CN107014946A CN 107014946 A CN107014946 A CN 107014946A CN 201710291559 A CN201710291559 A CN 201710291559A CN 107014946 A CN107014946 A CN 107014946A
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- ammonia
- denitration device
- scr denitration
- concentration
- consumption
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 49
- 238000000205 computational method Methods 0.000 title claims abstract description 10
- 239000003546 flue gas Substances 0.000 claims abstract description 18
- 239000000428 dust Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000010531 catalytic reduction reaction Methods 0.000 claims abstract description 7
- 230000008676 import Effects 0.000 claims description 7
- 229910000069 nitrogen hydride Inorganic materials 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 6
- 239000003344 environmental pollutant Substances 0.000 abstract description 5
- 231100000719 pollutant Toxicity 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 239000010881 fly ash Substances 0.000 abstract description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/10—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using catalysis
-
- 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
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Dispersion Chemistry (AREA)
- Molecular Biology (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Treating Waste Gases (AREA)
Abstract
Have the present invention relates to a kind of SCR denitration device ammonia consumption computational methods, including step：(1) ammonia consumption is calculatedFormula is：(2) according to ammonia consumptionAdjust the supply of ammonia in selective catalytic reduction reaction.The present invention not only will be with NOXThe ammonia and escape ammonia of reaction can be regarded as the ammonia of SCR denitration device consumption, the ammonia that boiler fly ash absorbs also is counted simultaneously, the ammonia consumption of calculating more conforms to the practical operation situation of equipment, make selective catalytic reduction reaction more reasonable, discharge of the pollutant to air is reduced, this method only increases the detection of SCR denitration device exiting flue gas dust concentration and the detection of dust ammon amount, you can complete to implement, method is simple, strong operability.
Description
Technical field
The invention belongs to engineering measuring technology field, particularly a kind of SCR denitration device ammonia consumption computational methods.
Background technology
As China gradually steps up to the attention degree of environmental protection and its related industry, identification and detection side to environmental protection equipment
Method is greatly improved, wherein the desulphurization and denitration testing techniques of equipment to boiler smoke has corresponding standards and norms.But
The problem of examination criteria at this stage has excessively simple, for the ease of scene detection and calculating, it is considered to On-the-spot factor
It is less.Calculating side wherein there is with the inspection method of the ammonia consumption of selective catalytic reduction reaction (abbreviation SCR) denitrification apparatus
Method is simple, it is considered to the less situation of other factors.Only account for ammonia amount and the escaping of ammonia that the nitrogen oxides in flue gas is consumed
Content, do not have consideration exhaust gas dust the problem of absorb a part of ammonia.
The content of the invention
The purpose of the present invention is in view of the shortcomings of the prior art, and to propose a kind of SCR denitration device ammonia consumption computational methods.
The present invention solves its technical problem and takes following technical scheme to realize：
A kind of SCR denitration device ammonia consumption computational methods, including step are as follows：
(1) ammonia consumption is calculatedMethod formula is as follows：
In formula：--- ammonia consumption, kg/h；
Q --- air preheater exiting flue gas flow, Nm3/h；
--- NO in SCR denitration device import flue gasXConcentration, mg/Nm3；
——NO2Molal weight, g/mol；
——NH3Molal weight, g/mol；
--- NO in SCR import flue gasesXConcentration, mg/Nm3；
--- ammonia slip concentration, mg/Nm3；
——NO2Molal weight, g/mol；
——NH3Molal weight, g/mol；
--- denitration efficiency, %；
N --- flying dust percentage containing ammonia (quality), %；
CDust--- dust concentration in SCR denitration device exiting flue gas, mg/Nm3；
(2) according to ammonia consumptionThe supply of ammonia in selective catalytic reduction reaction is adjusted, makes SCR anti-
More rationally it should reduce discharge of the pollutant to air.
Moreover, NO in the formula of the step (1)XConcentration is with NO2Meter, and be standard state, butt and 6%O2；Ammonia is escaped simultaneously
Ease concentration is standard state, butt and 6%O2, dust concentration is standard state, butt and 6%O in SCR denitration device exiting flue gas2。
Advantages and positive effects of the present invention are：
1st, the present invention not only will be with NOXThe ammonia and escape ammonia of reaction can be regarded as the ammonia of SCR denitration device consumption, while by pot
The ammonia that converter fly ash absorbs also is counted.New computational methods remain GB/T 16157-1996《In Concentration in Fixed Pollutants Source
Grain thing is determined and the gaseous contaminant method of sampling》The selection mode of sampling measuring point in 4.2, not only to denitration import and export cigarette
NO in gasXAnd outlet escape ammonia is detected, also denitration exiting flue gas dust concentration is tested.Simultaneously from sampling
Ammon amount analysis is carried out in flying dust, the ammonia amount that flying dust absorbs is detected, finally detects boiler fuel flow, its ammonia consumption calculated
Also the practical operation situation of equipment is more conformed to, makes selective catalytic reduction reaction more reasonable, pollutant is reduced to air
Discharge.
2nd, the present invention is among actually measurement, and the detection of increase SCR denitration device exiting flue gas dust concentration and dust contain ammonia
Amount detection, you can complete to implement, method is simple, strong operability.
Embodiment
The embodiment of the present invention is further described below：It is emphasized that embodiment of the present invention is explanation
Property, rather than it is limited, therefore the present invention is not limited to the embodiment described in embodiment, it is every by this area
The other embodiment that technical staff's technique according to the invention scheme is drawn, also belongs to the scope of protection of the invention.
A kind of SCR denitration device ammonia consumption computational methods, including step are as follows：
(1) ammonia consumption is calculatedMethod formula is as follows：
In formula：--- ammonia consumption, kg/h；
Q --- air preheater exiting flue gas flow (standard state, butt, 6%O2), Nm3/h；
--- NO in SCR denitration device import flue gasXConcentration is (with NO2Meter, standard state, butt, 6%O2), mg/Nm3；
——NO2Molal weight, g/mol；
——NH3Molal weight, g/mol；
--- NO in SCR import flue gasesXConcentration is (with NO2Meter, standard state, butt, 6%O2), mg/Nm3；
--- ammonia slip concentration (standard state, butt, 6%O2), mg/Nm3；
——NO2Molal weight, g/mol；
——NH3Molal weight, g/mol；
--- denitration efficiency, %；
N --- flying dust percentage containing ammonia (quality), %；
CDust--- dust concentration (standard state, butt, 6%O in SCR denitration device exiting flue gas2), mg/Nm3；
(2) according to ammonia consumptionThe supply of ammonia in selective catalytic reduction reaction is adjusted, makes SCR anti-
More rationally it should reduce discharge of the pollutant to air.
Claims (2)
1. a kind of SCR denitration device ammonia consumption computational methods, it is characterised in that as follows including step：
(1) ammonia consumption is calculatedMethod formula is as follows：
In formula：--- ammonia consumption, kg/h；
Q --- air preheater exiting flue gas flow, Nm3/h；
--- NO in SCR denitration device import flue gasXConcentration, mg/Nm3；
——NO2Molal weight, g/mol；
——NH3Molal weight, g/mol；
--- NO in SCR import flue gasesXConcentration, mg/Nm3；
--- ammonia slip concentration, mg/Nm3；
——NO2Molal weight, g/mol；
——NH3Molal weight, g/mol；
--- denitration efficiency, %；
N --- flying dust mass percent containing ammonia, %；
CDust--- dust concentration in SCR denitration device exiting flue gas, mg/Nm3；
(2) according to ammonia consumptionAdjust the supply of ammonia in selective catalytic reduction reaction.
2. SCR denitration device ammonia consumption computational methods according to claim 1, it is characterised in that：The public affairs of the step (1)
NO in formulaXConcentration is with NO2Meter, and be standard state, butt and 6%O2；While ammonia slip concentration and SCR denitration device exiting flue gas
Middle dust concentration is standard state, butt and 6%O2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710291559.8A CN107014946A (en) | 2017-04-28 | 2017-04-28 | A kind of SCR denitration device ammonia consumption computational methods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710291559.8A CN107014946A (en) | 2017-04-28 | 2017-04-28 | A kind of SCR denitration device ammonia consumption computational methods |
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| Publication Number | Publication Date |
|---|---|
| CN107014946A true CN107014946A (en) | 2017-08-04 |
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| CN201710291559.8A Pending CN107014946A (en) | 2017-04-28 | 2017-04-28 | A kind of SCR denitration device ammonia consumption computational methods |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103163245A (en) * | 2013-03-15 | 2013-06-19 | 浙江省电力公司电力科学研究院 | Method for detecting content of ammonia in fly ash of coal-fired boiler |
| CN103207249A (en) * | 2013-03-15 | 2013-07-17 | 浙江省电力公司电力科学研究院 | Method for detecting ammonia escape of flue gas denitrification system |
| CN103674103A (en) * | 2013-10-18 | 2014-03-26 | 广东电网公司电力科学研究院 | Performance testing method for SCR (Selective Catalytic Reduction) flue gas denitration system |
| CN105424836A (en) * | 2015-11-30 | 2016-03-23 | 国网浙江省电力公司电力科学研究院 | Method for detecting content of ammonia in fly ash |
| CN106295166A (en) * | 2016-08-05 | 2017-01-04 | 国网安徽省电力公司电力科学研究院 | A kind of SCR denitration device amount of ammonia slip measuring method and application thereof |
-
2017
- 2017-04-28 CN CN201710291559.8A patent/CN107014946A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103163245A (en) * | 2013-03-15 | 2013-06-19 | 浙江省电力公司电力科学研究院 | Method for detecting content of ammonia in fly ash of coal-fired boiler |
| CN103207249A (en) * | 2013-03-15 | 2013-07-17 | 浙江省电力公司电力科学研究院 | Method for detecting ammonia escape of flue gas denitrification system |
| CN103674103A (en) * | 2013-10-18 | 2014-03-26 | 广东电网公司电力科学研究院 | Performance testing method for SCR (Selective Catalytic Reduction) flue gas denitration system |
| CN105424836A (en) * | 2015-11-30 | 2016-03-23 | 国网浙江省电力公司电力科学研究院 | Method for detecting content of ammonia in fly ash |
| CN106295166A (en) * | 2016-08-05 | 2017-01-04 | 国网安徽省电力公司电力科学研究院 | A kind of SCR denitration device amount of ammonia slip measuring method and application thereof |
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Application publication date: 20170804 |