CN108646794A - Improve the method and system of denitration ammonia spraying amount monitoring reliability - Google Patents
Improve the method and system of denitration ammonia spraying amount monitoring reliability Download PDFInfo
- Publication number
- CN108646794A CN108646794A CN201810414438.2A CN201810414438A CN108646794A CN 108646794 A CN108646794 A CN 108646794A CN 201810414438 A CN201810414438 A CN 201810414438A CN 108646794 A CN108646794 A CN 108646794A
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- Prior art keywords
- ammonia
- spraying amount
- amount monitoring
- spare
- monitoring device
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 442
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 221
- 238000005507 spraying Methods 0.000 title claims abstract description 64
- 238000012544 monitoring process Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000012806 monitoring device Methods 0.000 claims abstract description 71
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003546 flue gas Substances 0.000 claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 claims description 64
- 238000002955 isolation Methods 0.000 claims description 25
- 238000001514 detection method Methods 0.000 claims description 16
- 238000010926 purge Methods 0.000 claims description 14
- 238000000926 separation method Methods 0.000 claims description 11
- 238000002425 crystallisation Methods 0.000 claims description 6
- 230000008025 crystallization Effects 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 238000010025 steaming Methods 0.000 claims 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000002411 adverse Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 description 14
- 239000012535 impurity Substances 0.000 description 8
- 238000013461 design Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses the method and system that a kind of raising denitration ammonia spraying amount monitors reliability, flue gas denitrification system relative to Benitration reactor, the at least a set of independent ammonia spraying amount monitoring device of multi-configuration, using as spare, by ammonia spraying amount monitoring device in switchover operation and spare ammonia spraying amount monitoring device, the uninterrupted monitoring of ammonia flow is realized.Spare ammonia spraying amount monitoring device can be put into operation, completely instead of running ammonia flow monitoring device, will not have an adverse effect to the normal operation of denitrating system, the fluctuation of Benitration reactor outlet nitrogen oxides will not be caused, thus there is higher environmental benefit and economic benefit.
Description
Technical field
The present invention relates to the method and systems that a kind of raising denitration ammonia spraying amount monitors reliability.
Background technology
Boiler flue gas denitration system by measure and control ammonia spraying amount number, realize to denitrating system export nitrogen oxides
The control of concentration.
Conventional design scheme is：In every set Benitration reactor instrument is detected on ammonia pipeline, installing an ammonia flow
With an ammonia flow regulating valve；In the design scheme of part, at ammonia flow detection instrument, design is a set of for ammonia shunting device, when
When ammonia flow detects the maintenance of instrument fault needs or replaces, ammonia is made to detect instrument through bypassing into denitration reaction across ammonia flow
Device.
Deficiency is existing for above-mentioned design scheme：When ammonia flow scale failure, ammonia flow can not be accurately measured, denitration is made
The concentration of reactor outlet nitrogen oxides can not accurately control, and be easy to cause spray ammonia and excessively cause more the escaping of ammonia or ammonia spraying amount
It is very few to cause outlet nitrogen oxides discharge beyond standards；When ammonia flow regulating valve failure, it cannot achieve automatic and accurate and adjust ammonia spraying amount,
The fluctuation that will also result in Benitration reactor outlet nitrogen oxides causes spray ammonia excessively to cause more the escaping of ammonia or ammonia spraying amount
It is very few to cause outlet nitrogen oxides discharge beyond standards, and ammonia flow regulating valve can not be carried out at isolation in denitrating system operation
Reason could be overhauled after denitrating systems can only be waited to stop transport.
Therefore, how to avoid ammonia flow detection instrument or ammonia flow regulating valve failure to the adverse effect of denitrating system, carry
The reliability of high denitration ammonia spraying amount monitoring, is those skilled in the art's technical problem urgently to be resolved hurrily.
Invention content
The present invention is to solve the above-mentioned problems, it is proposed that it is a kind of improve denitration ammonia spraying amount monitoring reliability method and be
System can be realized when ammonia flow detects instrument or ammonia flow regulating valve failure, by spare ammonia flow detection instrument, ammonia flow tune
Save the monitoring function that valve realizes ammonia flow.
To achieve the goals above, the present invention adopts the following technical scheme that：
The first object of the present invention is to provide a kind of method of raising denitration ammonia spraying amount monitoring reliability, including following step
Suddenly：
Relative to the flue gas denitrification system of Benitration reactor, at least a set of independent ammonia spraying amount monitoring device of multi-configuration, with
As spare, by ammonia spraying amount monitoring device in switchover operation and spare ammonia spraying amount monitoring device, realize ammonia flow not
Interruption monitoring.
Further, for there was only the flue gas denitrification system of a set of Benitration reactor, the ammonia spraying amount monitoring device institute of operation
For ammonia pipeline, and it is in parallel each by separation valve door for ammonia pipeline where spare ammonia spraying amount monitoring device.
Further, for including the flue gas denitrification systems of two sets of Benitration reactors, two sets of ammonia spraying amounts prison of normal operation
Control where device for ammonia pipeline, with as where public spare ammonia spraying amount monitoring device for ammonia pipeline each by being isolated
Valve in parallel.
Further, where the pipeline and spare ammonia spraying amount monitoring device where the ammonia spraying amount monitoring device each run
Pipeline, be connected with vapour source each by separation valve door；Pipeline where ammonia flow detects instrument, ammonia flow regulating valve
When the middle crystallization formed there are ammonia or other impurities, corresponding steam isolating door and tube outlet isolating valve are opened, steam is used
Pipeline is purged.
Further, above-mentioned steam blowing operation, at interval of certain time by DCS or PLC automatically by running spray
Pipeline where ammonia amount monitoring device is switched to stand-by state, and is purged automatically.
Of course, it is possible to be purged with manual switching.
Further, the switching between running ammonia spraying amount monitoring device and spare ammonia spraying amount monitoring device, design
At no-harass switch.
The process of the no-harass switch specifically includes：
Confirm that spare ammonia spraying amount regulating valve is fully closed, it is otherwise that its is fully closed；
The inlet isolation valve of pipeline where spare ammonia spraying amount monitoring device and outlet isolating valve are opened；
The open position for recording the ammonia flow regulating valve of operation, slowly opens spare ammonia flow regulating valve, meanwhile, slowly close
The ammonia flow regulating valve for closing operation, until spare ammonia flow regulating valve open to original operation ammonia flow regulating valve open position,
The ammonia flow regulating valve of operation is closed to closed positions；
The inlet isolation valve of pipeline where closing the ammonia spraying amount monitoring device of operation and outlet isolating valve.
The second object of the present invention is to provide a kind of system of raising denitration ammonia spraying amount monitoring reliability, including：
Run ammonia spraying amount monitoring loop, including be provided with ammonia flow detection instrument, ammonia flow regulating valve, for ammonia pipeline, enter
The circuit of mouth separation valve door and outlet isolation valve, the independent ammonia flow monitoring loop of formation；
Spare ammonia spraying amount monitoring loop, including be provided with ammonia flow detection instrument, ammonia flow regulating valve, for ammonia pipeline, enter
The independent ammonia flow monitoring loop of mouth separation valve door and outlet isolation valve；
The operation ammonia spraying amount monitoring loop and spare ammonia spraying amount monitoring loop connect purging each by isolating valve
Vapour source.
Compared with prior art, beneficial effects of the present invention are：
Ammonia flow detection instrument or ammonia flow regulating valve break down, where ammonia flow monitoring device in denitrating system operation
For occurring ammonia crystallization in ammonia pipeline or when more impurity, spare ammonia spraying amount monitoring device can put into operation, replace fortune completely
Ammonia flow monitoring device in row will not have an adverse effect to the normal operation of denitrating system, will not lead to Benitration reactor
The fluctuation of nitrogen oxides is exported, thus there is higher environmental benefit and economic benefit.
Description of the drawings
The accompanying drawings which form a part of this application are used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation do not constitute the improper restriction to the application for explaining the application.
Fig. 1 is a fortune one for ammonia flow monitoring system schematic diagram.
Fig. 2 is two fortune one for ammonia flow monitoring system schematic diagram.
Specific implementation mode：
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
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 implementation mode, 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 singulative
It is also 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 combination thereof.
In the present invention, term for example "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", " side ",
The orientation or positional relationship of the instructions such as "bottom" is to be based on the orientation or positional relationship shown in the drawings, only to facilitate describing this hair
Bright each component or component structure relationship and the relative of determination, not refer in particular to either component or element in the present invention, cannot understand
For limitation of the present invention.
In the present invention, term such as " affixed ", " connected ", " connection " shall be understood in a broad sense, and indicate may be a fixed connection,
Can also be to be integrally connected or be detachably connected；It can be directly connected, it can also be indirectly connected through an intermediary.For
The related scientific research of this field or technical staff can determine the concrete meaning of above-mentioned term in the present invention as the case may be,
It is not considered as limiting the invention.
Fig. 1 is the fortune one of the embodiment of the present invention one for ammonia flow monitoring system schematic diagram.The system is for only a set of denitration
The denitrating system of reactor.In figure, 1, for ammonia pipeline；2, running monitor device inlet isolation valve；3, spare monitoring device entrance
Isolating valve；4, operation ammonia flow detects instrument；5, spare ammonia flow detects instrument；6, ammonia flow regulating valve is run；7, spare ammonia
Flow control valve；8, running monitor device exports isolating valve；9, spare monitoring device exports isolating valve；10, for ammonia pipeline；11、
Purge steam supply line；12, running monitor device steam blowing isolating valve；13, spare monitoring device steam blowing isolating valve.
In figure, operation ammonia flow detection instrument 4 and spare ammonia flow detect the instrument that instrument 5 preferably selects same size model
Table, operation ammonia flow regulating valve 6 and spare ammonia flow regulating valve 7 preferably select the regulating valve of same size model, to meet it
Interchangeability needs.
In normal operation, running monitor device inlet isolation valve 2 and outlet isolating valve 8 are opened, and spare monitoring device enters
Mouth isolating valve 3 and outlet isolating valve 9 are turned off, and running monitor device steam blowing isolating valve 12, spare monitoring device steam are blown
Isolating valve 13 is swept to be turned off.Ammonia flows through running monitor device inlet isolation valve 2, operation ammonia flow detection instrument 4, operation ammonia stream
Adjustable valve 6, running monitor device outlet isolating valve 8 enter for ammonia pipeline 10.
There is ammonia crystallization inside operation ammonia flow detection instrument 4,6 failure of operation ammonia flow regulating valve or pipeline
Or the impurity effect ammonia to precipitate flowing, cause ammonia flow reduce or fluctuation when, spare monitoring device can be put into
Operation, switch step are：One, confirm that spare ammonia flow regulating valve 7 is located at closed positions, be otherwise turned off；Two, it opens spare
Monitoring device inlet isolation valve 3 and outlet isolating valve 9；Three, the open position of operation ammonia flow regulating valve 6 is remembered first, then
Spare ammonia flow regulating valve 7 is slowly opened, meanwhile, slowly closing runs ammonia flow regulating valve 6, until spare ammonia flow regulating valve
7 open to the open position of former operation ammonia flow regulating valve 6,6 pass of operation ammonia flow regulating valve to closed positions；Four, operation is closed
The inlet isolation valve 2 of pipeline where ammonia spraying amount monitoring device and outlet isolating valve 8.
It is described slowly to open spare ammonia flow regulating valve 7 in above-mentioned third step, meanwhile, slowly closing runs ammonia flow
Regulating valve 6 can carry out, such as in the way of alternately open and close：1st step is opened spare ammonia flow regulating valve 7 to 1% by aperture 0%,
Operation ammonia flow regulating valve 6 is turned down 1% by current location again；2nd step, by spare ammonia flow regulating valve 7 by aperture 1% open to
2%, then operation ammonia flow regulating valve 6 is turned down 1% by current location；And so on, until operation ammonia flow regulating valve 6 is complete
It closes.The fluctuation of ammonia flow in handoff procedure can be reduced using this operating method.
When the separation valve door in said program uses electric and pneumatic door, above-mentioned handoff procedure can pass through DCS (dispersions
Control system) or PLC (programmable controller) the control program of configuration is automatically performed in advance.
When in the pipeline where monitoring device, there are ammonia crystallization or when other impurities, steam can be used and carry out purging cleaning.
By taking pipeline where spare monitoring device as an example, purge step is：One, confirm that spare monitoring device inlet isolation valve 3 is turned off；
Two, confirm the standard-sized sheet of spare ammonia flow regulating valve 7, otherwise opened to standard-sized sheet；Three, confirm that spare monitoring device exports isolating valve
9 have opened, and otherwise open it；Four, spare monitoring device steam blowing isolating valve 13 is opened；Five, it after the completion of purging, closes standby
Isolating valve 9 is exported with monitoring device steam blowing isolating valve 13 and spare monitoring device.
When the separation valve door in said program uses electric and pneumatic door, above-mentioned purge step can pass through DCS (dispersions
Control system) or PLC (programmable controller) the control program of configuration is automatically performed in advance.
It is understood that can also be installed additional independent on the pipeline where each ammonia flow monitoring device in said program
The discharge isolating valve and pipeline that purges steam, purged steam and impurity are discharged into flue or other positions.
Fig. 2 is the fortune one of the embodiment of the present invention two for ammonia flow monitoring system schematic diagram.
The denitrating system that the ammonia flow monitoring system is used to be made of two sets of Benitration reactors.In figure, 1, female for ammonia pipeline
Pipe；2, the sides A running monitor device inlet isolation valve；3, spare monitoring device inlet isolation valve；4, the sides A run ammonia flow detector
Table；5, spare ammonia flow detects instrument；6, the sides A run ammonia flow regulating valve；7, spare ammonia flow regulating valve；8, the sides A operation prison
It controls device and exports isolating valve；9, spare monitoring device is to A side outlet isolating valves；10, the denitration of the sides A is for ammonia pipeline；11, it purges steam
Supply main pipe；12, the sides A running monitor device steam blowing isolating valve；13, spare monitoring device steam blowing isolating valve；14、B
Side running monitor device steam blowing isolating valve；15, the sides B running monitor device inlet isolation valve；16, the sides B operation ammonia flow inspection
Survey instrument；17, the sides B run ammonia flow regulating valve；18, the sides B running monitor device exports isolating valve；19, spare monitoring device is to B
Side outlet isolating valve；20, the sides B denitration pipeline.
In figure, the sides A run ammonia flow detection instrument 4, the sides B operation ammonia flow detection instrument 16 and spare ammonia flow detector
Table 5 preferably selects the instrument of same size model, and the sides A run ammonia flow regulating valve 6, the sides B run ammonia flow regulating valve 17 and spare
Ammonia flow regulating valve 7 preferably selects the regulating valve of same size model, to meet its interchangeability needs.
In normal operation, the sides A running monitor device inlet isolation valve 2 and outlet isolating valve 8 are opened, the operation monitoring of the sides B
Device portal isolating valve 15 and outlet isolating valve 18 are opened, spare monitoring device inlet isolation valve 3, spare monitoring device to A
Side outlet isolating valve 9 and spare monitoring device to B side outlets isolating valve 19 are turned off；The sides A running monitor device steam blowing every
It is turned off from valve 12, the sides B running monitor device steam blowing isolating valve 14, spare monitoring device steam blowing isolating valve 13.Ammonia
Air-flow runs ammonia flow detection instrument 4 through the sides A running monitor device inlet isolation valve 2, the sides A, the sides A run ammonia flow regulating valve 6,
Running monitor device outlet isolating valve 8 in the sides A enters A side denitrations for ammonia pipeline 10；Meanwhile ammonia flows through the sides B running monitor device
Inlet isolation valve 15, the sides B operation ammonia flow detection instrument 16, the sides B operation ammonia flow regulating valve 17, the sides B running monitor device go out
Mouth isolating valve 18 enters B side denitrations for ammonia pipeline 20.
Occur inside the sides A operation ammonia flow detection instrument 4,6 failure of the sides A operation ammonia flow regulating valve or pipeline
Ammonia crystallizes or the flowing of the impurity effect ammonia that precipitates, ammonia flow is caused to reduce or when fluctuation, can fill spare monitoring
It sets and puts into operation instead of the sides A, switch step is：One, confirm that spare ammonia flow regulating valve 7 is located at closed positions, otherwise closed
It closes；Two, spare monitoring device inlet isolation valve 3 and spare monitoring device are opened to A side outlets isolating valve 9；Three, A is remembered first
Side runs the open position of ammonia flow regulating valve 6, then slowly opens spare ammonia flow regulating valve 7, meanwhile, the sides slowly closing A
Ammonia flow regulating valve 6 is run, is opened until spare ammonia flow regulating valve 7 to the open position of the former sides A operation ammonia flow regulating valve 6, A
Side runs ammonia flow regulating valve 6 and closes to closed positions；Four, the sides A running monitor device inlet isolation valve 2 and outlet isolating valve are closed
8。
Similarly, it when the sides B running monitor device breaks down, can also replace transporting by spare monitoring device by said program
Row.
When the separation valve door in said program uses electric and pneumatic door, above-mentioned handoff procedure can pass through DCS (dispersions
Control system) or PLC (programmable controller) the control program of configuration is automatically performed in advance.
When in the pipeline where monitoring device, there are ammonia crystallization or when other impurities, steam can be used and carry out purging cleaning.
By taking pipeline where spare monitoring device as an example, purge step is：One, confirm that spare monitoring device inlet isolation valve 3 is turned off；
Two, confirm the standard-sized sheet of spare ammonia flow regulating valve 7, otherwise opened to standard-sized sheet；Three, confirm spare monitoring device to A side outlets
Isolating valve 9 has been opened to B side outlets isolating valve 19, otherwise opens one of its；Four, spare monitoring device steam blowing is opened
Isolating valve 13；Five, after the completion of purging, spare monitoring device steam blowing isolating valve 13, spare monitoring device to A side outlets are closed
Isolating valve 9 or to B side outlets isolating valve 19.
When the separation valve door in said program uses electric and pneumatic door, above-mentioned purge step can pass through DCS (dispersions
Control system) or PLC (programmable controller) the control program of configuration is automatically performed in advance.
It is understood that can also be installed additional independent on the pipeline where each ammonia flow monitoring device in said program
The discharge isolating valve and pipeline that purges steam, purged steam and impurity are discharged into flue or other positions.
The foregoing is merely the preferred embodiments of the application, are not intended to limit this application, for the skill of this field
For art personnel, the application can have various modifications and variations.Within the spirit and principles of this application, any made by repair
Change, equivalent replacement, improvement etc., should be included within the protection domain of the application.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (10)
1. a kind of method improving denitration ammonia spraying amount monitoring reliability, it is characterized in that：Include the following steps：
Relative to the flue gas denitrification system of Benitration reactor, at least a set of independent ammonia spraying amount monitoring device of multi-configuration, using as
It is spare, by ammonia spraying amount monitoring device in switchover operation and spare ammonia spraying amount monitoring device, realize the uninterrupted of ammonia flow
Monitoring.
2. a kind of method improving denitration ammonia spraying amount monitoring reliability as described in claim 1, it is characterized in that：For there was only one
The flue gas denitrification system for covering Benitration reactor, where the ammonia spraying amount monitoring device of operation for ammonia pipeline, with spare ammonia spraying amount
It is in parallel each by separation valve door for ammonia pipeline where monitoring device.
3. a kind of method improving denitration ammonia spraying amount monitoring reliability as described in claim 1, it is characterized in that：For including two
The flue gas denitrification system for covering Benitration reactor, where two sets of ammonia spraying amount monitoring devices of normal operation for ammonia pipeline, with conduct
It is in parallel each by separation valve door for ammonia pipeline where public spare ammonia spraying amount monitoring device.
4. a kind of method improving denitration ammonia spraying amount monitoring reliability as described in claim 1, it is characterized in that：Each run
The pipeline where pipeline and spare ammonia spraying amount monitoring device where ammonia spraying amount monitoring device, each by separation valve door and steaming
Vapour source is connected；When ammonia flow detects the crystallization formed there are ammonia in instrument, the pipeline where ammonia flow regulating valve or other are miscellaneous
When matter, corresponding steam isolating door and tube outlet isolating valve are opened, pipeline is purged with steam.
5. a kind of method improving denitration ammonia spraying amount monitoring reliability as claimed in claim 4, it is characterized in that：At interval of certain
Pipeline where running ammonia spraying amount monitoring device is switched to stand-by state by the time automatically as DCS or PLC, and is blown automatically
It sweeps.
6. a kind of method improving denitration ammonia spraying amount monitoring reliability as claimed in claim 4, it is characterized in that：At interval of certain
Time is switched to stand-by state as the pipeline where the running ammonia spraying amount monitoring device of manual switching, and is purged.
7. a kind of method improving denitration ammonia spraying amount monitoring reliability as described in claim 1, it is characterized in that：Running spray
Switching between ammonia amount monitoring device and spare ammonia spraying amount monitoring device, is designed to no-harass switch.
8. a kind of method improving denitration ammonia spraying amount monitoring reliability as claimed in claim 7, it is characterized in that：The unperturbed is cut
The process changed specifically includes：
Confirm that spare ammonia spraying amount regulating valve is fully closed, it is otherwise that its is fully closed；
The inlet isolation valve of pipeline where spare ammonia spraying amount monitoring device and outlet isolating valve are opened；
The open position for recording the ammonia flow regulating valve of operation, slowly opens spare ammonia flow regulating valve, meanwhile, slowly closing fortune
Capable ammonia flow regulating valve, until spare ammonia flow regulating valve opens open position, the operation of the ammonia flow regulating valve to original operation
Ammonia flow regulating valve close to closed positions；
The inlet isolation valve of pipeline where closing the ammonia spraying amount monitoring device of operation and outlet isolating valve.
9. a kind of system improving denitration ammonia spraying amount monitoring reliability, it is characterized in that：Including：
Run ammonia spraying amount monitoring loop, including be provided with ammonia flow detection instrument, ammonia flow regulating valve, for ammonia pipeline, entrance every
Circuit from valve and outlet isolation valve, the independent ammonia flow monitoring loop of formation；
Spare ammonia spraying amount monitoring loop, including be provided with ammonia flow detection instrument, ammonia flow regulating valve, for ammonia pipeline, entrance every
Independent ammonia flow monitoring loop from valve and outlet isolation valve.
10. a kind of system improving denitration ammonia spraying amount monitoring reliability as claimed in claim 9, it is characterized in that：Operation spray ammonia
Monitoring loop and spare ammonia spraying amount monitoring loop are measured, the vapour source of purging is connected each by isolating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810414438.2A CN108646794B (en) | 2018-05-03 | 2018-05-03 | Method and system for improving monitoring reliability of denitration ammonia injection quantity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810414438.2A CN108646794B (en) | 2018-05-03 | 2018-05-03 | Method and system for improving monitoring reliability of denitration ammonia injection quantity |
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| Publication Number | Publication Date |
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| CN108646794A true CN108646794A (en) | 2018-10-12 |
| CN108646794B CN108646794B (en) | 2024-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810414438.2A Active CN108646794B (en) | 2018-05-03 | 2018-05-03 | Method and system for improving monitoring reliability of denitration ammonia injection quantity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113304586A (en) * | 2021-06-04 | 2021-08-27 | 浙江天地环保科技股份有限公司 | Ammonia water supply regulation control system of ammonia desulphurization system after ultralow emission of flue gas |
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| JPH10116105A (en) * | 1996-10-11 | 1998-05-06 | Tokyo Electric Power Co Inc:The | Generalized predictive control system and denitration controller |
| CN204051416U (en) * | 2014-09-18 | 2014-12-31 | 中国神华能源股份有限公司 | Thermal power plant's chemical processing system |
| JP2015075277A (en) * | 2013-10-09 | 2015-04-20 | 三菱日立パワーシステムズ株式会社 | Ammonia injection quantity control device and ammonia injection quantity control method |
| CN205940624U (en) * | 2016-07-25 | 2017-02-08 | 大唐阳城发电有限责任公司 | Denitration flue gas monitoring system |
| CN106621804A (en) * | 2016-11-15 | 2017-05-10 | 国家电网公司 | Fume ammonia injection mixing device and SCR (selective catalytic reduction) fume denitrification system |
| CN208223559U (en) * | 2018-05-03 | 2018-12-11 | 山东国电发电工程有限公司 | Can on-bne repair denitration ammonia spraying amount monitoring system |
-
2018
- 2018-05-03 CN CN201810414438.2A patent/CN108646794B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10116105A (en) * | 1996-10-11 | 1998-05-06 | Tokyo Electric Power Co Inc:The | Generalized predictive control system and denitration controller |
| JP2015075277A (en) * | 2013-10-09 | 2015-04-20 | 三菱日立パワーシステムズ株式会社 | Ammonia injection quantity control device and ammonia injection quantity control method |
| CN204051416U (en) * | 2014-09-18 | 2014-12-31 | 中国神华能源股份有限公司 | Thermal power plant's chemical processing system |
| CN205940624U (en) * | 2016-07-25 | 2017-02-08 | 大唐阳城发电有限责任公司 | Denitration flue gas monitoring system |
| CN106621804A (en) * | 2016-11-15 | 2017-05-10 | 国家电网公司 | Fume ammonia injection mixing device and SCR (selective catalytic reduction) fume denitrification system |
| CN208223559U (en) * | 2018-05-03 | 2018-12-11 | 山东国电发电工程有限公司 | Can on-bne repair denitration ammonia spraying amount monitoring system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113304586A (en) * | 2021-06-04 | 2021-08-27 | 浙江天地环保科技股份有限公司 | Ammonia water supply regulation control system of ammonia desulphurization system after ultralow emission of flue gas |
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| Publication number | Publication date |
|---|---|
| CN108646794B (en) | 2024-09-17 |
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