CN108490132A - One kind is based on comparison differential technique the escaping of ammonia detection device and method - Google Patents
One kind is based on comparison differential technique the escaping of ammonia detection device and method Download PDFInfo
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- CN108490132A CN108490132A CN201810285085.0A CN201810285085A CN108490132A CN 108490132 A CN108490132 A CN 108490132A CN 201810285085 A CN201810285085 A CN 201810285085A CN 108490132 A CN108490132 A CN 108490132A
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- flue gas
- ammonia
- flow rate
- scr reactor
- detection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
Abstract
The invention discloses one kind based on comparing differential technique the escaping of ammonia detection device and method, including computer, for based on the flue gas flow rate detecting system of flue gas flow rate in gridding method detection SCR reactor inlet flues, for based on NOx and O in flue gas in gridding method detection SCR reactor inlet flues2First detection of exhaust gas compositions system of concentration is used for based on NOx and O in flue gas in gridding method detection SCR reactor outlet flues2The ammonia flow gauge of ammonia flow in second detection of exhaust gas compositions system of concentration and the ammonia input pipe for detecting SCR reactors, wherein, the output end of ammonia flow gauge, the output end of the first flue gas flow rate detecting system, the output end of the first detection of exhaust gas compositions system and the second detection of exhaust gas compositions system output end be connected with the input terminal of computer, which can accurately detect to obtain the total amount of ammonia slip of SCR reactor outlets and average ammonia slip concentration.
Description
Technical field
The present invention relates to a kind of the escaping of ammonia detection device and methods, and in particular to one kind is examined based on differential technique the escaping of ammonia is compared
Survey device and method.
Background technology
Existing SCR or SNCR reactor outlets the escaping of ammonia measuring system is local sampling measuring system, in general flue
Only arrange a measuring point and configure a flue gas analyzer, such as local laser method only measure one of light path by flue gas partial
The escaping of ammonia, extraction method only measures the escaping of ammonia etc. for extracting flue gas measuring point position, and measurement data is only capable of displaying measurement regional area
The escaping of ammonia situation.However SCR denitration device flue cross section product is general all larger, and flue gas flow field and distribution of concentration are all very not
Uniformly, thus the data of local measurement it is overall often and in entire flue cross section the escaping of ammonia situation deviation it is larger, can not foundation
The data accurately learn the total amount of ammonia slip of denitrification apparatus and average ammonia slip concentration.
Invention content
It is an object of the invention to overcome the above-mentioned prior art, provide a kind of based on comparison differential technique the escaping of ammonia
Detection device and method, the device and method can be detected accurately to obtain the total amount of ammonia slip of SCR reactor outlets and be averaged
Ammonia slip concentration.
In order to achieve the above objectives, of the present invention to be based on comparing differential technique the escaping of ammonia detection device including computer, base
In gridding method detection SCR reactor inlet flues in flue gas flow rate flue gas flow rate detecting system, based on gridding method detection SCR it is anti-
Answer in device gas approach NOx and O in flue gas2First detection of exhaust gas compositions system of concentration detects SCR reactors based on gridding method
NOx and O in flue gas in exhaust pass2Second detection of exhaust gas compositions system of concentration and the ammonia for detecting SCR reactors
The ammonia flow gauge of ammonia flow in input pipe, wherein the output end of ammonia flow gauge, the first flue gas flow rate detecting system it is defeated
The output end of outlet, the output end of the first detection of exhaust gas compositions system and the second detection of exhaust gas compositions system is defeated with computer
Enter end to be connected.
The flue gas flow rate detecting system includes based on flue gas flow rate information in gridding method acquisition SCR reactor inlet flues
Flue gas flow rate multi-point sampling device, the SCR reactor inlet cigarettes for being collected according to flue gas flow rate multi-point sampling device
Flue gas flow rate information calculates the flue gas flow rate Multi point measuring apparatus of flue gas flow rate in SCR reactor inlet flues in road, wherein cigarette
The output end of gas velocity multi-point sampling device is connected with the input terminal of flue gas flow rate Multi point measuring apparatus, and flue gas flow rate multiple spot is surveyed
The output end of amount device is connected with the input terminal of computer.
The first detection of exhaust gas compositions system includes the first Flue Gas Pretreatment Device, the first flue gas analyzer and is based on
Gridding method acquires the first smoke components multi-point sampling device of flue gas in SCR reactor inlet flues, wherein the first smoke components
The first Flue Gas Pretreatment Device of outlet of multi-point sampling device is connected with the entrance of the first flue gas analyzer, the first flue gas point
The output end of analyzer is connected with the input terminal of computer.
The second detection of exhaust gas compositions system includes the second Flue Gas Pretreatment Device, the second flue gas analyzer and is based on
Gridding method acquires the second smoke components multi-point sampling device of flue gas in SCR reactor outlet flues, wherein the second smoke components
The second Flue Gas Pretreatment Device of outlet of multi-point sampling device is connected with the entrance of the second flue gas analyzer, the second flue gas point
The output end of analyzer is connected with the input terminal of computer.
It is of the present invention that based on differential technique the escaping of ammonia is compared, detection method includes the following steps：
Flue gas flow rate detecting system detects the flue gas flow rate in SCR reactor inlet flues in real time, then SCR reactors are entered
Flue gas flow rate in mouth flue is sent in computer, and the first detection of exhaust gas compositions system detects SCR reactor inlet cigarettes in real time
NOx and O in flue gas in road2Concentration, then by NOx and O in flue gas in SCR reactor inlet flues2Concentration be sent to computer
In, the second detection of exhaust gas compositions system detects in SCR reactor outlet flues NOx and O in flue gas in real time2Concentration, then by SCR
NOx and O in flue gas in reactor outlet flue2Concentration be sent in computer, ammonia flow gauge detects SCR reactors in real time
Ammonia input pipe in ammonia flow, and the flow of ammonia in the ammonia input pipe of SCR reactors is sent in computer,
Computer is according to the flue gas flow rate in SCR reactor inlet flues, NOx and O in flue gas in SCR reactor inlet flues2It is dense
NOx and O in flue gas in degree and SCR reactor inlet flues2Concentration calculate SCR reactor actual consumptions for ammonia amount, simultaneously
According in the ammonia input pipe of SCR reactors the flow rate calculation SCR reactor theories consumption of ammonia for ammonia amount, then basis
SCR reactor actual consumptions to calculate SCR reactor outlets for the difference for ammonia amount that ammonia amount and SCR reactor theories consume total
Amount of ammonia slip and average ammonia slip concentration.
The invention has the advantages that：
It is of the present invention based on comparing differential technique the escaping of ammonia detection device and method when specific operation, it is anti-according to SCR
Answer flue gas flow rate in device gas approach, NOx and O in flue gas in SCR reactor inlet flues2Concentration and SCR reactors enter
NOx and O in flue gas in mouth flue2Concentration calculate SCR reactor actual consumptions for ammonia amount, while according to SCR reactors
In ammonia input pipe ammonia flow rate calculation SCR reactor theories consumption for ammonia amount, then according to SCR reactor actual consumptions
Calculate the total amount of ammonia slip of SCR reactor outlets and average ammonia for the difference for ammonia amount that ammonia amount and SCR reactor theories consume
Escape concentration, the accuracy of measurement is higher, while flow and flow velocity are based on grid survey and obtain, therefore the precision tested
It is higher.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Wherein, 1 it is ammonia flow gauge, 2 be flue gas flow rate multi-point sampling device, 3 is flue gas flow rate Multi point measuring apparatus, 4
It is the first Flue Gas Pretreatment Device for the first smoke components multi-point sampling device, 5,6 be the first flue gas analyzer, 7 is the second cigarette
Gas ingredient multi-point sampling device, 8 be the second Flue Gas Pretreatment Device, 9 be the second flue gas analyzer, 10 be computer.
Specific implementation mode
The present invention is described in further detail below in conjunction with the accompanying drawings：
It is of the present invention to be based on comparing differential technique the escaping of ammonia detection device including computer 10, for being based on reference to figure 1
Gridding method detects the flue gas flow rate detecting system of flue gas flow rate in SCR reactor inlet flues, for detecting SCR based on gridding method
NOx and O in flue gas in reactor inlet flue2First detection of exhaust gas compositions system of concentration detects SCR for being based on gridding method
NOx and O in flue gas in reactor outlet flue2Second detection of exhaust gas compositions system of concentration and for detecting SCR reactors
Ammonia input pipe in ammonia flow ammonia flow gauge 1, wherein the output end of ammonia flow gauge 1, the first flue gas flow rate detection
The output end of the output end of system, the output end of the first detection of exhaust gas compositions system and the second detection of exhaust gas compositions system with meter
The input terminal of calculation machine 10 is connected.
The flue gas flow rate detecting system includes based on flue gas flow rate information in gridding method acquisition SCR reactor inlet flues
Flue gas flow rate multi-point sampling device 2, the SCR reactor inlets for being collected according to flue gas flow rate multi-point sampling device 2
Flue gas flow rate information calculates the flue gas flow rate Multi point measuring apparatus 3 of flue gas flow rate in SCR reactor inlet flues in flue,
In, the output end of flue gas flow rate multi-point sampling device 2 is connected with the input terminal of flue gas flow rate Multi point measuring apparatus 3, flue gas stream
The output end of fast Multi point measuring apparatus 3 is connected with the input terminal of computer 10.
The first detection of exhaust gas compositions system includes the first Flue Gas Pretreatment Device 5, the first flue gas analyzer 6 and base
In the first smoke components multi-point sampling device 4 of flue gas in gridding method acquisition SCR reactor inlet flues, wherein the first flue gas
The first Flue Gas Pretreatment Device of outlet 5 of ingredient multi-point sampling device 4 is connected with the entrance of the first flue gas analyzer 6, the
The output end of one flue gas analyzer 6 is connected with the input terminal of computer 10.
The second detection of exhaust gas compositions system includes the second Flue Gas Pretreatment Device 8, the second flue gas analyzer 9 and base
In the second smoke components multi-point sampling device 7 of flue gas in gridding method acquisition SCR reactor outlet flues, wherein the second flue gas
The second Flue Gas Pretreatment Device of outlet 8 of ingredient multi-point sampling device 7 is connected with the entrance of the second flue gas analyzer 9, the
The output end of two flue gas analyzers 9 is connected with the input terminal of computer 10.
It is of the present invention that based on differential technique the escaping of ammonia is compared, detection method includes the following steps：Flue gas flow rate detecting system
Flue gas flow rate in detection SCR reactor inlet flues in real time, then the flue gas flow rate in SCR reactor inlet flues is sent to
In computer 10, the first detection of exhaust gas compositions system detects in SCR reactor inlet flues NOx and O in flue gas in real time2It is dense
Degree, then by NOx and O in flue gas in SCR reactor inlet flues2Concentration be sent in computer 10, the second smoke components inspection
Examining system detects in SCR reactor outlet flues NOx and O in flue gas in real time2Concentration, then will be in SCR reactor outlet flues
NOx and O in flue gas2Concentration be sent in computer 10, ammonia flow gauge 1 in real time detection SCR reactors ammonia input pipe
The flow of interior ammonia, and the flow of ammonia in the ammonia input pipe of SCR reactors is sent in computer 10,10, computer
According to the flue gas flow rate in SCR reactor inlet flues, NOx and O in flue gas in SCR reactor inlet flues2Concentration and SCR it is anti-
Answer in device gas approach NOx and O in flue gas2Concentration calculate SCR reactor actual consumptions for ammonia amount, while it is anti-according to SCR
Answer that the flow rate calculation SCR reactor theories of ammonia in the ammonia input pipe of device consume for ammonia amount, it is then real according to SCR reactors
Border consumption for ammonia amount and the consumption of SCR reactor theories for the difference total amount of ammonia slip of calculating SCR reactor outlets of ammonia amount and
Average ammonia slip concentration.
Claims (5)
1. one kind is based on comparison differential technique the escaping of ammonia detection device, which is characterized in that examined including computer (10), based on gridding method
It surveys the flue gas flow rate detecting system of flue gas flow rate in SCR reactor inlet flues, SCR reactor inlet cigarettes is detected based on gridding method
NOx and O in flue gas in road2First detection of exhaust gas compositions system of concentration is detected based on gridding method in SCR reactor outlet flues
NOx and O in flue gas2Ammonia in second detection of exhaust gas compositions system of concentration and the ammonia input pipe for detecting SCR reactors
The ammonia flow gauge (1) of throughput, wherein the output of the output end of ammonia flow gauge (1), the first flue gas flow rate detecting system
End, the output end of the first detection of exhaust gas compositions system and the second detection of exhaust gas compositions system output end with computer (10)
Input terminal is connected.
2. according to claim 1 based on comparison differential technique the escaping of ammonia detection device, which is characterized in that the flue gas flow rate
Detecting system includes the flue gas flow rate multi-point sampling dress based on flue gas flow rate information in gridding method acquisition SCR reactor inlet flues
Set that (2), flue gas flow rate is believed in the SCR reactor inlet flues for collecting according to flue gas flow rate multi-point sampling device (2)
Breath calculates the flue gas flow rate Multi point measuring apparatus (3) of flue gas flow rate in SCR reactor inlet flues, wherein flue gas flow rate multiple spot
The output end of sampling apparatus (2) is connected with the input terminal of flue gas flow rate Multi point measuring apparatus (3), flue gas flow rate multimetering dress
The output end for setting (3) is connected with the input terminal of computer (10).
3. according to claim 1 based on comparison differential technique the escaping of ammonia detection device, which is characterized in that first flue gas
Composition detection system includes the first Flue Gas Pretreatment Device (5), the first flue gas analyzer (6) and acquires SCR based on gridding method
First smoke components multi-point sampling device (4) of flue gas in reactor inlet flue, wherein the first smoke components multi-point sampling fills
The first Flue Gas Pretreatment Device of outlet (5) for setting (4) is connected with the entrance of the first flue gas analyzer (6), the first flue gas point
The output end of analyzer (6) is connected with the input terminal of computer (10).
4. according to claim 3 based on comparison differential technique the escaping of ammonia detection device, which is characterized in that second flue gas
Composition detection system includes the second Flue Gas Pretreatment Device (8), the second flue gas analyzer (9) and acquires SCR based on gridding method
Second smoke components multi-point sampling device (7) of flue gas in reactor outlet flue, wherein the second smoke components multi-point sampling fills
The second Flue Gas Pretreatment Device of outlet (8) for setting (7) is connected with the entrance of the second flue gas analyzer (9), the second flue gas point
The output end of analyzer (9) is connected with the input terminal of computer (10).
5. one kind is based on comparison differential technique the escaping of ammonia detection method, which is characterized in that be based on comparing based on described in claim 1
Differential technique the escaping of ammonia detection device, includes the following steps：
Flue gas flow rate detecting system detects the flue gas flow rate in SCR reactor inlet flues in real time, then by SCR reactor inlet cigarettes
Flue gas flow rate in road is sent in computer (10), and the first detection of exhaust gas compositions system detects SCR reactor inlet cigarettes in real time
NOx and O in flue gas in road2Concentration, then by NOx and O in flue gas in SCR reactor inlet flues2Concentration be sent to computer
(10) in, the second detection of exhaust gas compositions system detects in SCR reactor outlet flues NOx and O in flue gas in real time2Concentration, then
By NOx and O in flue gas in SCR reactor outlet flues2Concentration be sent in computer (10), ammonia flow gauge (1) is real-time
The flow of ammonia in the ammonia input pipe of SCR reactors is detected, and the flow of ammonia in the ammonia input pipe of SCR reactors is sent out
It send into computer (10), computer (10) is according to flue gas flow rate, the SCR reactor inlet cigarettes in SCR reactor inlet flues
NOx and O in flue gas in road2Concentration and SCR reactor inlet flues in NOx and O in flue gas2Concentration to calculate SCR reactors real
Border consumption is consumed for ammonia amount, while according to the flow rate calculation SCR reactor theories of ammonia in the ammonia input pipe of SCR reactors
For ammonia amount, the difference for ammonia amount then consumed for ammonia amount and SCR reactor theories according to SCR reactor actual consumptions calculates
The total amount of ammonia slip of SCR reactor outlets and average ammonia slip concentration.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810285085.0A CN108490132A (en) | 2018-04-02 | 2018-04-02 | One kind is based on comparison differential technique the escaping of ammonia detection device and method |
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| CN201810285085.0A CN108490132A (en) | 2018-04-02 | 2018-04-02 | One kind is based on comparison differential technique the escaping of ammonia detection device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112461995A (en) * | 2020-11-03 | 2021-03-09 | 西安热工研究院有限公司 | Method for predicting ammonia escape of thermal power plant |
| CN113125637A (en) * | 2020-01-10 | 2021-07-16 | 国家能源投资集团有限责任公司 | Device and method for detecting ammonia concentration in flue gas |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125637A (en) * | 2020-01-10 | 2021-07-16 | 国家能源投资集团有限责任公司 | Device and method for detecting ammonia concentration in flue gas |
| CN112461995A (en) * | 2020-11-03 | 2021-03-09 | 西安热工研究院有限公司 | Method for predicting ammonia escape of thermal power plant |
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