CN108170090A - A kind of SCR state monitoring devices - Google Patents
A kind of SCR state monitoring devices Download PDFInfo
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- CN108170090A CN108170090A CN201810204722.7A CN201810204722A CN108170090A CN 108170090 A CN108170090 A CN 108170090A CN 201810204722 A CN201810204722 A CN 201810204722A CN 108170090 A CN108170090 A CN 108170090A
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- submodule
- signal
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- monitoring
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/058—Safety, monitoring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2612—Data acquisition interface
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a kind of SCR state monitoring devices, it includes：Acquisition module, connection control system, distribution are arranged on each submodule in SCR system, control signal, the operating state signal of part submodule and the monitoring information of part submodule sent out for acquisition control system；PLC, the control signal that acquisition module is obtained, operating state signal and monitoring information are sent into man-machine interaction panel；Man-machine interaction panel, the monitoring information of operating state signal, part submodule to collected part submodule and the control signal progress real-time display for being given to each submodule.Its advantage is：It can complete the real-time monitoring to SCR system key status parameters and control command.
Description
Technical field
The present invention relates to marine low speed diesel engine SCR system Condition Monitoring Technology fields, and in particular to a kind of SCR states prison
Control device.
Background technology
SCR system refers to the selective catalytic reduction system operating used on marine low speed diesel engine, and the technology is as reduction bavin
The treatment technology of oil machine noxious emission has industrially been used widely, it is mounted in engine exhaust system,
By the nitrogen oxides NO in the flue gas of dischargexSelective catalytic reduction is carried out, after reducing the exhaust of nitrogen oxide emission
Manage device.The system needs the additional substance that can generate reducing agent（Ammonia NH is generated for example, can hydrolyze3Urea）Because it can
Effectively to remove NOxUp to 90%, it is current reduction NOxThe most effectual way of discharge.
Invention content
The purpose of the present invention is to provide a kind of SCR state monitoring devices, can complete to SCR system key status parameters
With the real-time monitoring of control command, and with very high degree of protection.
In order to achieve the above object, the invention is realized by the following technical scheme：
A kind of SCR state monitoring devices, it is characterized in that, comprising：
Acquisition module, connection control system, distribution are arranged on each submodule in SCR system, are sent out for acquisition control system
Control signal, the operating state signal of part submodule and the monitoring information of part submodule；
PLC, the control signal that acquisition module is obtained, operating state signal and monitoring information are sent into man-machine interaction panel；
Man-machine interaction panel, the monitoring information of operating state signal, part submodule to collected part submodule and
The control signal for being given to each submodule carries out real-time display.
Above-mentioned SCR state monitoring devices, wherein：
The feedback signal of each submodule is also sent to control system by PLC, so that control system carries out except control SCR system
Further real-time command control except signal
Above-mentioned SCR state monitoring devices, wherein, the operating state signal of the part submodule refers to：
Urea sprays the run signal and fault-signal of submodule；
The run signal and fault-signal of heat tracing submodule；
The run signal and fault-signal of soot blowing submodule；
The run signal and fault-signal of deflation submodule.
Above-mentioned SCR state monitoring devices, wherein, the monitoring information of the part submodule refers to：
The pressure state monitoring information that air pressure monitoring device acquires on soot blowing submodule；
The urea injection flow of urea injecting quantity monitoring device acquisition, pressure state monitoring signals on urea injection submodule；
The state of temperature monitoring signals that flue-gas temperature monitoring device acquires on heat tracing submodule；
The nitrous oxides concentration status monitoring signal of flue gas concentration monitoring device acquisition.
Above-mentioned SCR state monitoring devices, wherein：
Man-machine interaction panel is arranged in central station of floating dock.
Above-mentioned SCR state monitoring devices, wherein：
PLC is arranged in electric box, and wire connection terminal and power supply for connecting acquisition module and PLC are also included in electric box and is used
Breaker, power supply, UPS, battery, relay；
PLC uses WAGOPLC；
Three rows, first row installation breaker, power supply, UPS, battery, relay are arranged in electric box, second row installs PLC, the
Three rows install wire connection terminal.
Above-mentioned SCR state monitoring devices, wherein：
Electric box edge part carries out double-fold processing, and is sealed using foaming foam, and door lock uses and wears happy carat
Tight lock.
Compared with the prior art, the present invention has the following advantages：It can complete to SCR system key status parameters and control
The real-time monitoring of order.
Description of the drawings
The structure diagram of SCR system that Fig. 1 is applied for the SCR state monitoring devices of the present invention；
Fig. 2 is the system block diagram of the SCR state monitoring devices of the present invention；
Fig. 3 is that schematic diagram is arranged in the inside of the electric box of the SCR state monitoring devices of the present invention.
Specific embodiment
Below in conjunction with attached drawing, by the way that a preferable specific embodiment is described in detail, the present invention is further elaborated.
As shown in Figure 1, SCR system, usually connects an external control system, SCR system includes several function devices, several
It is additionally provided with submodule for monitoring between function device or above, that is, the usually distribution of each submodule is arranged on SCR system
In, specifically, in the present embodiment：Aqueous solution of urea deposits in holding vessel, and holding vessel will need heat tracing to avoid lower temperature feelings
Aqueous solution of urea freezes under condition, and aqueous solution of urea is discharged by metering control 12, and compressed air passes through pressure control device
13 releases；11 flue gas of engine（Ingredient mainly has NOx）, compressed air and holding vessel be all connected with one of flue 14, in cigarette
Static mixer 15 and reactor catalysis oxidant layer 19 are set gradually in road 14 respectively, is led in an interior compressed air of flue 14
It crosses vent valve to spray aqueous solution of urea to hot 11 flue gas of engine, it is high to generate reduction efficiency after aqueous solution of urea gasification
Ammonia NH3, static mixer 15 for improve into reactor catalysis oxidant layer 19 NH3/NOxIt is uniformly distributed, NH3With in flue gas
NOxReaction, which is carried out, in reactor catalysis oxidant layer 19 is converted into harmless water vapour and N2, while harmful flue gas particle is absorbed,
Harmless water vapour and N2It is finally discharged by the other end of flue, maintains relatively low NH3Escapement ratio；In addition, in reactor catalyst
Soot blower 10 is set on layer 19, and timing soot blowing ensures the cleaning of catalyst surface, after the static mixer 15 of flue 14
One flue gas concentration calibrating installation 16 of setting, the cigarette after reactor catalysis oxidant layer 19 are drawn before reactor catalysis oxidant layer 19
One ammonia concentration monitoring device 18 of setting is drawn on road 14, for detecting ammonia content in the final vacuum of reaction, is urged in reactor
It is drawn on flue before agent layer and a flue gas concentration calibrating installation 16 is set for detecting nitrogen oxides test number just
True property, while a flue gas concentration monitoring device 17 is also set up, the both ends of flue gas concentration monitoring device 17 are connected respectively to reactor
On flue 14 before and after catalyst layer 19, for before detecting into reactor and going out containing for nitrogen oxides after reactor
Amount.
As shown in Fig. 2, the present invention proposes a kind of SCR state monitoring devices, acquisition module 22, PLC23 and man-machine are included
Interactive panel 21；Acquisition module 22 connects control system, is distributed each submodule being arranged in SCR system, for acquisition control
Control signal, the operating state signal of part submodule and the monitoring information of part submodule that system is sent out；PLC23 is used for
Control signal, operating state signal and the monitoring information that acquisition module 22 is obtained are sent into man-machine interaction panel 21, and will be each
The feedback signal of a submodule is sent to control system, so as to control system to SCR system carry out in addition to control signals into
One step real-time command controls；Operating state signal, part submodule of the man-machine interaction panel 21 to collected part submodule
Monitoring information and be given to each submodule control signal carry out real-time display.
The operating state signal of the part submodule includes：Urea sprays submodule（Metering control i.e. mentioned above
Device 12 processed, pressure control device 13）Run signal and fault-signal；Heat tracing, deflation submodule（In general, heat tracing submodule
Mounted in flue 14 mentioned above between reactor catalysis oxidant layer 19, when detecting that flue-gas temperature is less than catalytic reaction requirement
When, it works to flue gas；Deflation submodule is also on flue 14 to the pipeline between reactor catalysis oxidant layer 19, such as
Fruit engine is not operate at SCR states, and deflation submodule can bypass flue gas, around SCR system）Run signal and failure letter
Number；Soot blowing submodule（Soot blower 10 i.e. mentioned above）Run signal and fault-signal；Wherein, the operating status
Signal refers to operation, stops, ready etc..
The monitoring information of the part submodule includes：The pressure that air pressure monitoring device acquires on soot blowing submodule
Status monitoring information；The urea injection flow of urea injecting quantity monitoring device acquisition, pressure state prison on urea injection submodule
Measurement information；The state of temperature monitoring information that flue-gas temperature monitoring device acquires on heat tracing submodule；Flue gas concentration monitoring device 17
The nitrous oxides concentration status monitoring information of acquisition；Further, the pressure differential state prison of the inlet and outlet of flue 14 can also be acquired
Measurement information；For the SCR system of some submodules containing high-temperature valve, it is also necessary to further acquisition valve opening information.
PLC23 is arranged in electric box, and uses WAGOPLC, also includes to connect PLC23 and acquisition in electric box
The wire connection terminal of module 22；Breaker, power supply, UPS, battery, the relay of power supply are also included in electric box；As shown in figure 3,
Three rows, first row installation breaker, power supply, UPS, battery, relay, second row installation PLC, third row are arranged in electric box
Wire connection terminal is installed, such design typesetting is reasonable, install compact, while meets the design of electrical traces system, conveniently applies
Work operates.
Electric box edge part carries out double-fold processing, and the region to be sealed of electric box is carried out using foaming foam
Sealing, to reach better close effect, door lock uses Dai Leke Strain locks, further improves the obturation effect of babinet.
Although present disclosure is discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (7)
1. a kind of SCR state monitoring devices, which is characterized in that include：
Acquisition module, connection control system, distribution are arranged on each submodule in SCR system, are sent out for acquisition control system
Control signal, the operating state signal of part submodule and the monitoring information of part submodule；
PLC, the control signal that acquisition module is obtained, operating state signal and monitoring information are sent into man-machine interaction panel；
Man-machine interaction panel, the monitoring information of operating state signal, part submodule to collected part submodule and
The control signal for being given to each submodule carries out real-time display.
2. SCR state monitoring devices as described in claim 1, it is characterised in that：
The feedback signal of each submodule is also sent to control system by PLC, so that control system carries out except control SCR system
Further real-time command control except signal.
3. SCR state monitoring devices as described in claim 1, which is characterized in that the operating status of the part submodule
Signal refers to：
Urea sprays the run signal and fault-signal of submodule；
The run signal and fault-signal of heat tracing submodule；
The run signal and fault-signal of soot blowing submodule；
The run signal and fault-signal of deflation submodule.
4. the SCR state monitoring devices as described in claim 1 or 3, which is characterized in that the monitoring letter of the part submodule
Breath refers to：
The pressure state monitoring information that air pressure monitoring device acquires on soot blowing submodule；
The urea injection flow of urea injecting quantity monitoring device acquisition, pressure state monitoring signals on urea injection submodule；
The state of temperature monitoring signals that flue-gas temperature monitoring device acquires on heat tracing submodule；
The nitrous oxides concentration status monitoring signal of flue gas concentration monitoring device acquisition.
5. SCR state monitoring devices as described in claim 1, it is characterised in that：
Man-machine interaction panel is arranged in central station of floating dock.
6. SCR state monitoring devices as described in claim 1, it is characterised in that：
PLC is arranged in electric box, and wire connection terminal and power supply for connecting acquisition module and PLC are also included in electric box and is used
Breaker, power supply, UPS, battery, relay；
PLC uses WAGOPLC；
Three rows, first row installation breaker, power supply, UPS, battery, relay are arranged in electric box, second row installs PLC, the
Three rows install wire connection terminal.
7. SCR state monitoring devices as claimed in claim 6, it is characterised in that：
Electric box edge part carries out double-fold processing, and is sealed using foaming foam, and door lock uses and wears happy carat
Tight lock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810204722.7A CN108170090A (en) | 2018-03-13 | 2018-03-13 | A kind of SCR state monitoring devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810204722.7A CN108170090A (en) | 2018-03-13 | 2018-03-13 | A kind of SCR state monitoring devices |
Publications (1)
| Publication Number | Publication Date |
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| CN108170090A true CN108170090A (en) | 2018-06-15 |
Family
ID=62511942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810204722.7A Pending CN108170090A (en) | 2018-03-13 | 2018-03-13 | A kind of SCR state monitoring devices |
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Cited By (2)
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|---|---|---|---|---|
| CN109396114A (en) * | 2018-12-13 | 2019-03-01 | 北京国电龙源环保工程有限公司 | The intelligent cleaning system and its method for cleaning of SCR catalyst surface area ash |
| CN110566323A (en) * | 2019-09-06 | 2019-12-13 | 沪东重机有限公司 | Mounting structure of marine HPSCR auxiliary system |
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