CN106512723A - Denitration automatic regulating loop device - Google Patents
Denitration automatic regulating loop device Download PDFInfo
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- CN106512723A CN106512723A CN201611218064.4A CN201611218064A CN106512723A CN 106512723 A CN106512723 A CN 106512723A CN 201611218064 A CN201611218064 A CN 201611218064A CN 106512723 A CN106512723 A CN 106512723A
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 83
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 30
- 238000004364 calculation method Methods 0.000 claims description 20
- 229910021529 ammonia Inorganic materials 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 12
- 230000003111 delayed effect Effects 0.000 claims description 8
- 210000004247 hand Anatomy 0.000 claims description 7
- 238000004088 simulation Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 5
- 230000006870 function Effects 0.000 claims description 4
- 238000005549 size reduction Methods 0.000 claims description 4
- 230000009711 regulatory function Effects 0.000 claims description 2
- 238000010926 purge Methods 0.000 abstract description 5
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- 230000005856 abnormality Effects 0.000 abstract 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 3
- 238000000738 capillary electrophoresis-mass spectrometry Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- 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
- B01D53/8696—Controlling the catalytic process
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- 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
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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
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
- G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
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- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
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- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Automation & Control Theory (AREA)
- Power-Operated Mechanisms For Wings (AREA)
- Feedback Control In General (AREA)
Abstract
The invention discloses a denitration automatic regulating loop device. When the situation that a measured value is abnormal due to analysis meter purging, equipment system abnormality and other causes of a denitration system occurs, through a lagging device and a comparison device, the measured value changing condition can be judged, when the measured value is kept unchanged or changed slightly, a regulating loop is forbidden to increase and decrease, and the overregulation phenomenon of a regulating system is prevented. When the system returns to normal, automatic regulation can be restored and continued, the regulating loop does not need to be switched frequently between manual regulation and automatic regulation, and the automatic regulation efficiency and quality are ensured. The denitration automatic regulating loop device is composed of four parts and applied to the denitration automatic regulating loop.
Description
Technical field：
The present invention relates in measured value, a kind of denitration automatic adjustment circuit device, judges and prohibit that increasing taboo subtracts loop, regulating loop is not
With frequently carrying out handss automatic switchover, it is ensured that the efficiency for automatically adjusting and quality.
Background technology：
Denitration automatic adjustment circuit is generally realized by DCS, is connected by FBD method.It is de- for SCR catalyst reducing process
For nitre technology, denitration automatically adjusts by controlling ammonia injection adjustable valve to realize the regulation to exiting flue gas NOX, controls
Denitration efficiency is in the range of design load.As China is to environmental conservation pay attention to day by day, it is ensured that neat stress NOX qualified discharges become
Our necessary work.
Denitration automatic adjustment circuit be compared by exiting flue gas NOx measurement and setting value after difference, go control
PID regulator, actuator output spray the aperture of adjustable valve by manual operator output control ammonia, survey exiting flue gas NOX
Value is consistent substantially with setting value.
Be present shortcoming in original denitration automatic adjustment circuit, cannot put into always.Shortcoming：Exiting flue gas NOX measured values lead to
Cross CEMS analysers to measure, analyser is infrared extraction heated type, and in measurement process, analyser needs regular purge
（Dust otherwise in flue gas easily blocks sampling line）, in purge, output valve holding purging pre-test value is constant, and this is right
It is a kind of very big interference for denitration is automatically adjusted, original regulating loop is put into.
The content of the invention：
It is an object of the invention to provide a kind of denitration automatic adjustment circuit device.
Above-mentioned purpose is realized by following technical scheme：
A kind of denitration automatic adjustment circuit device, its composition include four parts：Denitration automatic adjustment circuit device, its composition include
Four parts：Automatically cut manual logic function loop feature；Normal regulating functional loop part；Prohibit increasing taboo and subtract functional loop part；
Override closes functional loop part.
Described denitration automatic adjustment circuit device, described manual logical circuit part composition of cutting include：Comparison means
One, two inputs of described comparison means one respectively with the output for adjusting door feedback signal and analog quantity switching selector
End connection, and receive to adjust the output order of door feedback signal and analog quantity switching selector, comparison means one calculates the two
Deviation, result of calculation is connected with the input of high lower bound device one as output order, its outfan；High lower bound device one,
The input of described high lower bound device one is connected with the outfan of comparison means one, receives the output order of comparison means one,
And compare with high-low limits, then exporting more than limit value and put, its outfan is connected with the input of timing closing device；Timing closing
Device, the input of described timing closing device receive the output order of high lower bound device one, when input is 1, time delay 1
Second, output puts 1, its outfan with or one of input of logic device one be connected；, high limit device one, described high limit
Device one is connected with regulated variable signal, is received regulated variable signal, and is compared with ceiling value, is then exported more than limit value and is put 1, its output
Hold with or another input of logic device one be connected；Or logic device one, two inputs of described or logic device one
End is connected with timing closing device and high limit device one respectively, and receives the output order of the two, when two inputs have one
For 1 when, or the output of logic device one puts 1, and its outfan is connected with one of input MAN ends of manual operator device.Handss
Behaviour's device device has multiple inputs, one of input MAN ends with or the outfan of logic device one be connected, acceptance or logic
The output order of device one, when input is 1（Represent that the instruction of regulation door is big with feedback deviation or regulated variable signal is beyond certainly
Dynamic range of accommodation）, manual operator is switched to manual mode, and now manual operator receives the manual operation instruction of operations staff, and conduct
Manual operator itself outfan instruction output, and PID regulator tracking manual operator output order, the outfan of manual operator device with
The input connection of analog quantity switching selector；One of input N-terminal of analog quantity switching selector and manual operator
The outfan connection of device, receives manual operator output order under normal circumstances, and exports regulation door command signal.
Described denitration automatic adjustment circuit device, described normal regulating funtion part include：Setting value device, it is described
Setting value device receive operations staff manually set value signal, one of input S of its outfan and PID regulator
End connection；Lagging device one, described lagging device one are connected with regulated variable signal, receive regulated variable signal, and signal is done
Delayed process, its outfan are connected with another input P ends of PID regulator；PID regulator, described PID regulator
Two input S ends and P ends are connected with setting value device and lagging device one respectively, and receive setting value device and lagging device
One outfan instruction, according to the deviation of the two after corresponding PID arithmetic output control instruction, its outfan and manual operator
Device connects；Manual operator device, described manual operator device have multiple inputs, its Regulate signal input and PID regulator
Outfan connection, under automatic mode, manual operator receives the output order of actuator, and used as the finger of manual operator itself outfan
Order output, the outfan of manual operator device are connected with the input of analog quantity switching selector；Analog quantity switching selector,
One of input N-terminal of described analog quantity switching selector is connected with the outfan of manual operator device, normal condition
Under receive manual operator output order, and export regulation door command signal.
Described denitration automatic adjustment circuit device, described normal regulating functional loop part include：Lagging device two,
Described lagging device two is connected with regulated variable signal, receives regulated variable signal, and the delayed process of 5 seconds is done to signal, and which is defeated
Go out end to be connected with one of input of comparison means two；Comparison means two, two inputs of described comparison means two
It is connected with the outfan of regulated variable signal and lagging device two respectively, and receives the output of regulated variable signal and lagging device two and refers to
Order, comparison means two calculate the deviation of the two, and result of calculation can reflect 5 seconds variable quantities in front and back of regulated variable, its outfan with
The input connection of high lower bound device two；High lower bound device two, input and the comparison means two of described high lower bound device two
Outfan connection, receive the output order of comparison means two, and compare with high-low limits ± 0.08, then export more than limit value and put
1, it is otherwise 0, the input that its outfan disconnects device with time delay is connected；Time delay disconnects device, and described time delay disconnects device
Input be connected with the outfan of high lower bound device two, when input for 0 when, time delay 5 seconds, output sets to 0, its outfan and logic
The input connection of negated calculation device；The negated calculation device of logic, the input of the negated calculation device of described logic with prolong
When disconnect device outfan connection, when input for 0 when（Regulated variable change is represented less than ± 0.08 and continues 5 seconds）, output
1 is put, its outfan is connected with the one of input with logic device two；With logic device two, described and logic device
Two two inputs one of output terminals A end respectively with manual operator device（Its value represents manual operator in automatic mold for 1
Formula）Connect with the outfan of the negated calculation device of logic, when two inputs are 1, represent that, under automatic mode, regulated variable becomes
Change less than ± 0.08 and continuing 5 seconds, now device output switch amount instruction puts 1, and its outfan is divided into two-way, wherein all the way with
One of input LWI ends of manual operator device（Taboo subtracts）Connection, another road with or logic device two one of input
End connection；Lower bound device one, the input of described lower bound device one are connected with regulated variable signal, receive regulated variable signal, and
Compare with lower limit value, then export less than lower limit value and put 1, its outfan and be connected with one of input of logic device one；
High limit device two, the input of described high limit device two are connected with the escaping of ammonia rate signal, receive the escaping of ammonia rate signal, and with height
Limit value compares, and then exports more than ceiling value and puts 1, its outfan and is connected with another input of logic device one；With logic
Device one, it is described to connect with the outfan of lower bound device one and high limit device two with logic device one two inputs respectively
Connect, when two inputs are 1, output puts 1, its outfan with or another input of logic device two be connected；Or patrol
Volume device two, two inputs of described or logic device two respectively with the output with logic device two and with logic device one
End connection, when it is 1 that two inputs have one, represents under automatic mode, regulated variable change is less than ± 0.08 and continues 5
Second, or the escaping of ammonia rate transfinites, and now device output switch amount instruction puts 1, and one of them of its outfan and manual operator device is defeated
Enter to hold RAI ends（Prohibit and increase）Connection.Manual operator device has multiple inputs, one of input LWI ends and with logic device two
Outfan connection, the outfan connection of another input RAI ends and/or logic device two, when LWI ends are 1（Represent quilt
Tune amount signal intensity very little is basically unchanged）, manual operator is switched to taboo size reduction mode, and manual operator output order can only increase and can not subtract
It is little；When RAI ends are 1（Represent that regulated variable signal intensity very little or peace escapement ratio exceed alarm limits）, manual operator is switched to taboo
Increasing pattern, manual operator output order can only reduce can not be increased, if LWI ends and RAI ends are 1 simultaneously, manual operator output is protected
Hold in currency, the outfan of manual operator device is connected with the input of analog quantity switching selector；Analog quantity switching is selected
One of input N-terminal of device is connected with the outfan of manual operator device, receives manual operator output order under normal circumstances,
And export regulation door command signal.
Denitration automatic adjustment circuit device according to claim 1 or 2 or 3 or 4, is characterized in that：
Described override closes functional loop part to be included：Analog quantity switching selector, described analog quantity switching selector
There are multiple inputs, one of input selects input to be connected with SCR reactor trip signals, another input Y ends
Connect with analog quantity maker, be 1 when input is selected（Represent the tripping operation of SCR reactors）When, analog quantity switching selector connects
It is input into by the simulation numerical quantity at Y ends, and exports regulation door command signal, the numerical parameter in analog quantity maker can changes,
Initial parameter value is 0, in this loop, when reactor trips, adjusts door and closes, otherwise receives manual operator instruction.
Beneficial effects of the present invention：
Regulating loop of the present invention mainly solves in self-regulating process CEMS analysers purging or device systems reason etc., and other are different
Often result in measured value and keep or vary less in a period of time the interference problem to automatically adjusting, regulating loop is smoothly thrown
Enter without frequently carrying out handss automatic switchover.
Control loop of the present invention, causes measured value when other reasons such as analyser is purged or device systems are abnormal occurs in system
When varying less in constant or a period of time, by lagging device and comparison means, it can be determined that go out measurement variation situation, when
When measured value keeps constant or varies less, make regulating loop prohibit increasing taboo and subtract, prevent regulating system from over control occur, work as system
When recovering normal, can recover to continue to automatically adjust, regulating loop is without frequently carrying out handss automatic switchover, it is ensured that automatically adjust
Efficiency and quality, this regulating loop do not affect normal manual operation.
Description of the drawings：
Accompanying drawing 1 is the structural representation of the present invention.
Specific embodiment：
Embodiment 1：
A kind of denitration automatic adjustment circuit device, its composition include four parts：Automatically cut manual logic function loop feature；Normally
Regulatory function loop feature；Prohibit increasing taboo and subtract functional loop part；Override closes functional loop part.
Embodiment 2：
Denitration automatic adjustment circuit device according to embodiment 1, is characterized in that：Described cuts manual logical circuit part group
Into including：Comparison means 1, two inputs of described comparison means 1 respectively with adjust door feedback signal 23 and simulation
The outfan connection of amount switching selector 3, and receive to adjust the output of door feedback signal 23 and analog quantity switching selector 3
Instruction, comparison means 1 calculate the deviation of the two, and result of calculation is used as output order, its outfan and high lower bound device 1
Input connects；High lower bound device 1, the described input of high lower bound device 1 are connected with the outfan of comparison means 1
Connect, receive the output order of comparison means 1, and compare with high-low limits, then export more than limit value and put 1, its outfan with prolong
When closing device 4 input connection；Timing closing device 4, the input of described timing closing device 4 receive high lower bound dress
Put one 2 output order, when input for 1 when, time delay 1 second, output put 1, its outfan with or logic device 1 one of them
Input connects；, high to limit device 1, described high limit device 1 is connected with regulated variable signal 24, receives regulated variable signal, and
Compare with ceiling value, then export more than limit value and put 1, its outfan with or another input of logic device 1 be connected；Or patrol
Device 1 is collected, two inputs of described or logic device 1 are connected with timing closing device 4 and high limit device 1 respectively
Connect, and receive the output order of the two, when it is 1 that two inputs have one, or the output of logic device 1 puts 1, its output
End is connected with one of input MAN ends of manual operator device 14.Manual operator device 14 has multiple inputs, and one of them is defeated
Enter to hold MAN ends with or the outfan of logic device 1 be connected, receive or logic device 1 output order, when input is 1
When（Expression regulation door instructs or regulated variable signal big with feedback deviation to exceed and automatically adjusts scope）, manual operator is switched to manually
Pattern, now manual operator receive operations staff manual operation instruction, and as manual operator itself outfan instruction export, and
PID regulator 13 tracks manual operator output order, the outfan of manual operator device 14 and the input of analog quantity switching selector 3
End connection；One of input N-terminal of analog quantity switching selector 3 is connected with the outfan of manual operator device 14, normally
In the case of receive manual operator output order, and export regulation door command signal 26.
Embodiment 3：
Denitration automatic adjustment circuit device according to embodiment 1 or 2, described normal regulating funtion part include：Setting
Value device 19, what described setting value device 19 received operations staff manually sets value signal, its outfan and PID regulator 13
The connection of one of input S ends；Lagging device 1, described lagging device 1 are connected with regulated variable signal 24, are received
Regulated variable signal, and delayed process is done to signal, its outfan is connected with another input P ends of PID regulator 13；PID
Actuator 13, two input S ends and P ends of described PID regulator 13 respectively with setting value device 19 and lagging device 1
Connection, and receive the outfan instruction of setting value device 19 and lagging device 1, according to the deviation of the two through corresponding PID
Output control instruction after computing, its outfan are connected with manual operator device 14；Manual operator device 14, described manual operator device 14
There are multiple inputs, its Regulate signal input is connected with the outfan of PID regulator 13, under automatic mode, manual operator receives
The output order of actuator, and as the instruction output of manual operator itself outfan, outfan and the simulation of manual operator device 14
The input connection of amount switching selector 3；Analog quantity switching selector 3, described analog quantity switching selector 3 its
In an input N-terminal be connected with the outfan of manual operator device 14, receive manual operator output order under normal circumstances, and export
Adjust door command signal 26.
Embodiment 4：
Denitration automatic adjustment circuit device according to embodiment 1 or 2 or 3, described normal regulating functional loop part bag
Include：Lagging device 29, described lagging device 29 are connected with regulated variable signal 24, are received regulated variable signal, and are done 5 to signal
The delayed process of second, its outfan are connected with one of input of comparison means 2 10；Comparison means 2 10, described ratio
It is connected with the outfan of regulated variable signal 24 and lagging device 29 compared with two inputs of device 2 10 respectively, and receives to be adjusted
The output order of amount signal 24 and lagging device 29, comparison means 2 10 calculate the deviation of the two, and result of calculation can reflect quilt
5 seconds variable quantities in front and back of tune amount, its outfan are connected with the input of high lower bound device 2 11；High lower bound device 2 11, it is described
The input of high lower bound device 2 11 be connected with the outfan of comparison means 2 10, the output for receiving comparison means 2 10 refers to
Order, and compare with high-low limits ± 0.08, then exporting more than limit value and put 1, be otherwise 0, its outfan disconnects device 12 with time delay
Input connection；Time delay disconnects device 12, and the input that described time delay disconnects device 12 is defeated with high lower bound device 2 11
Go out end connection, when input for 0 when, time delay 5 seconds, output sets to 0, and the input of the negated calculation device of its outfan and logic 17 connects
Connect；The negated calculation device 17 of logic, input and the time delay of the negated calculation device of described logic 17 disconnect the output of device 12
End connection, when input is 0（Regulated variable change is represented less than ± 0.08 and continues 5 seconds）, output put 1, its outfan with
One of input connection of logic device 2 16；With logic device 2 16, described is defeated with two of logic device 2 16
Enter end one of output terminals A end respectively with manual operator device 14（Its value represents manual operator in automatic mode for 1）With patrol
The outfan connection of negated calculation device 17 is collected, when two inputs are 1, represents that, under automatic mode, regulated variable changes not
More than ± 0.08 and continue 5 seconds, now device output switch amount instruction puts 1, and its outfan is divided into two-way, wherein grasping with handss all the way
One of input LWI ends of device device 14（Taboo subtracts）Connection, another road with or logic device 2 15 one of input
End connection；Lower bound device 1, the input of described lower bound device 1 are connected with regulated variable signal 24, receive regulated variable letter
Number, and compare with lower limit value, then export less than lower limit value and put 1, its outfan and the one of input with logic device 1
End connection；High limit device 2 22, the input of described high limit device 2 22 are connected with the escaping of ammonia rate signal 25, receive the escaping of ammonia
Rate signal, and being compared with ceiling value, is then exported more than ceiling value and puts 1, its outfan and defeated with another of logic device 1
Enter end connection；With logic device 1, it is described with logic device 1 two inputs respectively with lower bound device 1 and height
The outfan connection of limit device 2 22, when two inputs are 1, output puts 1, its outfan with or logic device 2 15
Another input connects；Or logic device 2 15, two inputs of described or logic device 2 15 respectively with logic
Device 2 16 and be connected with the outfan of logic device 1, when two inputs have one for 1 when, represent under automatic mode,
Regulated variable change is less than ± 0.08 and continues 5 seconds, or the escaping of ammonia rate transfinites, and now device output switch amount instruction puts 1, and which is defeated
Go out one of input RAI ends at end and manual operator device 14（Prohibit and increase）Connection.Manual operator device 14 has multiple inputs, its
In an input LWI end and be connected with the outfan of logic device 2 16, another input RAI ends and/or logic device two
15 outfan connection, when LWI ends are 1（Represent regulated variable signal intensity very little or be basically unchanged）, manual operator is switched to taboo
Size reduction mode, manual operator output order can only increase and can not reduce；When RAI ends are 1（Represent regulated variable signal intensity very little or peace
Escapement ratio exceedes alarm limits）, manual operator is switched to prohibits increasing pattern, and manual operator output order can only reduce can not be increased, if
LWI ends and RAI ends are 1 simultaneously, then manual operator output is maintained at currency, and outfan and the analog quantity of manual operator device 14 switch
The input connection of selecting device 3；One of input N-terminal of analog quantity switching selector 3 and manual operator device 14
Outfan connects, and receives manual operator output order under normal circumstances, and exports regulation door command signal 26.
Embodiment 5：
Denitration automatic adjustment circuit device according to embodiment 1 or 2 or 3 or 4, described override close functional loop part bag
Include：Analog quantity switching selector 3, described analog quantity switching selector 3 have multiple inputs, one of input choosing
Select input to be connected with SCR reactors trip signal 20, another input Y ends and analog quantity maker 21 connect, and work as selection
Input is 1（Represent the tripping operation of SCR reactors）When, analog quantity switching selector 3 receives the simulation numerical quantity input at Y ends, and
Output adjusts door command signal 26.Numerical parameter in analog quantity maker can change, and initial parameter value is 0.In this loop
In, when reactor trips, adjust door and close, otherwise receive manual operator instruction.
Embodiment 6：
Denitration automatic adjustment circuit device according to embodiment 1 or 2 or 3 or 4 or 5, whole loop receive with regard to simulation
Amount input signal has three, respectively adjusts door feedback signal 23, regulated variable signal 24 and the escaping of ammonia rate signal 25, switchs on the spot
Amount input signal has one：SCR reactors trip signal 20, coincidence circuit can also receive operations staff manual operation instruction and
Automatic mode setting value setting signal, loop output adjust door command signal 26 to equipment on the spot.Described comparison means 1 connects
Receive and adjust door feedback signal 23, it is described high limit device 1, described lagging device 1, described lower bound device 8, described
Comparison means 2 10 and described lagging device 29 receive regulated variable signal 24 respectively, and described high limit module 2 22 receives ammonia
Escapement ratio signal 25, described analog quantity switching selector 3 send and adjust door command signal.
Embodiment 7：
Comparison means 1:Device has two inputs, receives analog input signal, and device calculates the deviation of the two, calculates knot
Fruit is instructed as analog output；
High lower bound device 1：Device can receive analog input signal, and compare with high-low limits, when input and limit value deviation
More than 5, the instruction of output switch amount puts 1.
Analog quantity switching selector 3：There are three inputs, N-terminal, Y ends and selection input FLAG ends, N-terminal and Y terminations
By analog input signal, FLAG terminations are by On-off signal signal, device output analog signalses instruction, when FLAG ends are 1
When, switching selector selects Y ends as output order, otherwise selects N-terminal as output order.
Timing closing device 4：Device can receive On-off signal signal, when input is 1, time delay 1 second, and output switch amount
Instruction puts 1.
Or logic device 1：Device has two inputs, receives On-off signal signal, and device calculates the deviation of the two,
Result of calculation is instructed as analog output, and when it is 1 that two inputs have one, the instruction of output switch amount puts 1.
High limit device 1：Device can receive analog input signal, and compare with ceiling value, when input is more than ceiling value
When, the instruction of output switch amount puts 1.
Lagging device 1：Device receives analog input signal, and delayed process is done to signal, and lag time is 2 seconds.
Lower bound device 1：Device can receive analog input signal, and compare with lower limit value, when input is less than lower limit value
When, the instruction of output switch amount puts 1.
Lagging device 29：Device receives analog input signal, and delayed process is done to signal, 5 seconds lag time.
Comparison means 2 10：Device has two inputs, receives analog input signal, and device calculates the deviation of the two,
Result of calculation is instructed as analog output.Device 10 is used cooperatively with device 9, can compare regulated variable change in front and back in 5 seconds.
High lower bound device 2 11：Device can receive analog input signal, and compare with high-low limits ± 0.08, more than limit
Value is then exported and puts 1, is otherwise 0.
Time delay disconnects device 12：Device receives On-off signal signal, and the instruction of output switch amount.When input is 0, prolong
When 5 seconds, output sets to 0.Device 9, device 10, device 11 are used cooperatively with device 12, can compare regulated variable change in front and back in 5 seconds
Change, when regulated variable change is less than ± 0.08.
Actuator 13：Device has two analog input ends, respectively setting value input S ends and regulated variable input P
End, device export Analog control instruction after corresponding PID arithmetic according to the deviation of the two.
Manual operator device 14：Device has multiple inputs, wherein three on-off model inputs：MAN ends, LWI ends,
RAI ends, an analog signalses input：Regulate signal input.Under automatic mode, manual operator receives from analog signalses
The actuator output order of input, and as the instruction output of manual operator itself outfan；When MAN ends are 1（In this loop
Middle expression regulation door instructs or regulated variable signal big with feedback deviation to exceed and automatically adjusts scope）, manual operator is switched to manually
Pattern, now manual operator receive operations staff manual operation instruction, and as manual operator itself outfan instruction export, and
PID regulator 13 tracks manual operator output order；When LWI ends are 1（In this loop represent regulated variable signal intensity very little or
It is basically unchanged）, manual operator is switched to taboo size reduction mode, and manual operator output order can only increase and can not reduce；When RAI ends are 1（
Represent in this loop that regulated variable signal intensity very little or peace escapement ratio exceed alarm limits）, manual operator is switched to prohibits increasing pattern, handss
Behaviour's device output order can only reduce and can not increase；If LWI ends and RAI ends are 1 simultaneously, manual operator output is maintained at current
Value.
Or logic device 2 15：Device has two On-off signal ends, and when it is 1 that two inputs have one, output is put
1.In this loop, under automatic mode, regulated variable change is less than ± 0.08 and continuing 5 seconds, or the escaping of ammonia rate is when transfiniting, output
Put 1.
With logic device 2 16：Device has two On-off signal ends, when two inputs are 1, output switch amount
Instruction puts 1.In this loop, under automatic mode, regulated variable change is less than ± 0.08 and continues 5 seconds, then output puts 1.
The negated calculation device of logic 17：Device has an On-off signal end, when input is 0, the instruction of output switch amount
Put 1.In this loop, when regulated variable change is less than ± 0.08 and continues 5 seconds, output puts 1.
With logic device 1：Device has two On-off signal ends, when two inputs are 1, output switch amount
Instruction puts 1.In this loop, when regulated variable is normal and the escaping of ammonia rate transfinites, output puts 1.
Setting value device 19：Device can receive the analog quantity setting value setting signal of operations staff, and export analog quantity
Instruct actuator.
Analog quantity maker 21：There is initial analog quantity parameter setting inside device, parameter value can change, device output
Analog quantity numerical signal.
High limit device 2 22：Device has an On-off signal end, and when input is more than ceiling value, the instruction of output switch amount puts 1.
Claims (5)
1. a kind of denitration automatic adjustment circuit device, its composition include four parts：Automatically cut manual logic function loop feature；Just
Normal regulatory function loop feature；Prohibit increasing taboo and subtract functional loop part；Override closes functional loop part.
2. denitration automatic adjustment circuit device according to claim 1, is characterized in that：Described cuts manual logical circuit portion
Be grouped into including：Comparison means one, two inputs of described comparison means one respectively with adjust door feedback signal and simulation
The outfan connection of switching selector is measured, and receives to adjust the output of door feedback signal and analog quantity switching selector and referred to
Order, comparison means one calculate the deviation of the two, result of calculation as output order, the input of its outfan and high lower bound device one
End connection；High lower bound device one, the input of described high lower bound device one are connected with the outfan of comparison means one, receive ratio
Compared with the output order of device one, and compare with high-low limits, then export more than limit value and put, its outfan and timing closing device
Input connects；Timing closing device, the input of described timing closing device receive the output order of high lower bound device one,
When input for 1 when, time delay 1 second, output put 1, its outfan with or one of input of logic device one be connected；, high limit
Device one, described high limit device one are connected with regulated variable signal, are received regulated variable signal, and are compared with ceiling value, more than limit
Value is then exported and puts 1, its outfan with or another input of logic device one be connected；Or logic device one, it is described or patrol
Two inputs for collecting device one are connected with timing closing device and high limit device one respectively, and receive the output order of the two,
When two inputs have one for 1 when, or the output of logic device one puts 1, its outfan and manual operator device one of them
Input MAN ends connect.Manual operator device has multiple inputs, one of input MAN ends with or logic device one it is defeated
Go out the output order of end connection, acceptance or logic device one, when input is 1（Represent that regulation door instruction is big with feedback deviation
Or regulated variable signal is beyond automatically adjusting scope）, manual operator is switched to manual mode, and now manual operator receives operations staff's
Manual operation is instructed, and the instruction as manual operator itself outfan is exported, and PID regulator tracking manual operator output order,
The outfan of manual operator device is connected with the input of analog quantity switching selector；Wherein the one of analog quantity switching selector
Individual input N-terminal is connected with the outfan of manual operator device, is received manual operator output order under normal circumstances, and is exported regulation door
Command signal.
3. denitration automatic adjustment circuit device according to claim 1 and 2, is characterized in that：Described normal regulating function
Part includes：Setting value device, what described setting value device received operations staff manually set value signal, its outfan with
One of input S ends connection of PID regulator；Lagging device one, described lagging device one are connected with regulated variable signal,
Receive regulated variable signal, and delayed process is done to signal, its outfan is connected with another input P ends of PID regulator；
PID regulator, two input S ends and P ends of described PID regulator are connected with setting value device and lagging device one respectively
Connect, and receive the outfan instruction of setting value device and lagging device one, according to the deviation of the two after corresponding PID arithmetic
Output control is instructed, and its outfan is connected with manual operator device；Manual operator device, described manual operator device have multiple inputs
End, its Regulate signal input is connected with the outfan of PID regulator, and under automatic mode, manual operator receives the output of actuator
Instruction, and as the instruction output of manual operator itself outfan, outfan and the analog quantity switching selector of manual operator device
Input connection；Analog quantity switching selector, one of input N-terminal of described analog quantity switching selector with
The outfan connection of manual operator device, receives manual operator output order under normal circumstances, and exports regulation door command signal.
4. the denitration automatic adjustment circuit device according to claim 1 or 2 or 3, is characterized in that：
Described normal regulating functional loop part includes：Lagging device two, described lagging device two are connected with regulated variable signal
Connect, receive regulated variable signal, and the delayed process of 5 seconds is done to signal, one of input of its outfan and comparison means two
End connection；Comparison means two, two inputs of described comparison means two respectively with regulated variable signal and lagging device two
Outfan connects, and receives the output order of regulated variable signal and lagging device two, and comparison means two calculates the deviation of the two, meter
Calculate result and can reflect 5 seconds variable quantities in front and back of regulated variable, its outfan is connected with the input of high lower bound device two；High lower bound
Device two, the input of described high lower bound device two are connected with the outfan of comparison means two, receive the defeated of comparison means two
Go out instruction, and compare with high-low limits ± 0.08, then export more than limit value and put 1, be otherwise 0, its outfan disconnects dress with time delay
The input connection put；Time delay disconnects device, and described time delay disconnects the input of device and the outfan of high lower bound device two
Connection, when input is 0, time delay 5 seconds, output sets to 0, and its outfan is connected with the input of the negated calculation device of logic；Logic
Negated calculation device, the outfan that the input of the negated calculation device of described logic disconnects device with time delay are connected, and work as input
For 0 when（Regulated variable change is represented less than ± 0.08 and continues 5 seconds）, output puts 1, its outfan and its with logic device two
In the connection of input；With logic device two, it is described with logic device two two inputs respectively with manual operator device
One of output terminals A end（Its value represents manual operator in automatic mode for 1）With the outfan of the negated calculation device of logic
Connection, when two inputs are 1, represents under automatic mode, regulated variable change is less than ± 0.08 and continues 5 seconds, now
The instruction of device output switch amount puts 1, and its outfan is divided into two-way, wherein the one of input with manual operator device all the way
LWI ends（Taboo subtracts）Connection, another road with or one of input of logic device two be connected；Lower bound device one, described are low
The input of limit device one is connected with regulated variable signal, is received regulated variable signal, and is compared with lower limit value, then defeated less than lower limit value
Go out to put 1, its outfan and be connected with one of input of logic device one；High limit device two, described high limit device two
Input be connected with the escaping of ammonia rate signal, receive the escaping of ammonia rate signal, and compare with ceiling value, then export more than ceiling value and put
1, its outfan and it is connected with another input of logic device one；With logic device one, it is described with logic device one
Two inputs are connected with the outfan of lower bound device one and high limit device two respectively, and when two inputs are 1, output is put
1, its outfan with or another input of logic device two be connected；Or logic device two, it is described or logic device two
Two inputs are connected with logic device two and with the outfan of logic device one respectively, when two inputs have one for 1
When, representing under automatic mode, regulated variable change is less than ± 0.08 and continues 5 seconds, or the escaping of ammonia rate transfinites, now device output
Switching value instruction puts 1, one of input RAI ends of its outfan and manual operator device（Prohibit and increase）Connection.Manual operator device
There are multiple inputs, one of input LWI ends and be connected with the outfan of logic device two, another input RAI ends
And/or the outfan connection of logic device two, when LWI ends are 1（Represent regulated variable signal intensity very little or be basically unchanged）, handss
Behaviour's device is switched to taboo size reduction mode, and manual operator output order can only increase and can not reduce；When RAI ends are 1（Represent regulated variable signal
Escapement ratio is varied less or is pacified more than alarm limits）, manual operator is switched to prohibits increasing pattern, and manual operator output order can only reduce not
Can increase, if LWI ends and RAI ends are 1 simultaneously, manual operator output is maintained at currency, the outfan of manual operator device with
The input connection of analog quantity switching selector；One of input N-terminal of analog quantity switching selector and manual operator
The outfan connection of device, receives manual operator output order under normal circumstances, and exports regulation door command signal.
5. the denitration automatic adjustment circuit device according to claim 1 or 2 or 3 or 4, is characterized in that：
Described override closes functional loop part to be included：Analog quantity switching selector, described analog quantity switching selector
There are multiple inputs, one of input selects input to be connected with SCR reactor trip signals, another input Y ends
Connect with analog quantity maker, be 1 when input is selected（Represent the tripping operation of SCR reactors）When, analog quantity switching selector connects
It is input into by the simulation numerical quantity at Y ends, and exports regulation door command signal, the numerical parameter in analog quantity maker can changes,
Initial parameter value is 0, in this loop, when reactor trips, adjusts door and closes, otherwise receives manual operator instruction.
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| CN201611218064.4A CN106512723B (en) | 2016-12-26 | 2016-12-26 | Denitration automatic regulating loop device |
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