CN105149136B - Spray gun control system and method in a kind of power plant's denitration reaction - Google Patents
Spray gun control system and method in a kind of power plant's denitration reaction Download PDFInfo
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- CN105149136B CN105149136B CN201510489545.8A CN201510489545A CN105149136B CN 105149136 B CN105149136 B CN 105149136B CN 201510489545 A CN201510489545 A CN 201510489545A CN 105149136 B CN105149136 B CN 105149136B
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- Prior art keywords
- spray gun
- selector
- output end
- amplifier
- spray
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/02—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery
Abstract
The invention discloses spray gun control system and method in a kind of power plant's denitration reaction, spray gun control system includes signal distributor, amplifier, selector and N number of spray gun for being used to spray urea liquid in described power plant's denitration reaction；N is integer, N >=2；The controlled quentity controlled variable output end of signal distributor connects with the input of amplifier；The controlled quentity controlled variable input of N number of spray gun is connected with the output end of amplifier；The multiplication factor of amplifier is N；The selection signal output end of signal distributor is connected with the input of selector；N number of output end of selector is corresponding with the Enable Pin of N number of spray gun respectively to be connected.Spray gun control system and method are easy to implement in power plant's denitration reaction, control high sensitivity.
Description
Technical field
The present invention relates to spray gun control system and method in a kind of power plant's denitration reaction.
Background technology
Urea：The organic compound being made up of carbon, nitrogen, oxygen and hydrogen, also known as urea (with urinating unisonance).Its chemical formula is
CON2H4、(NH2)2CO or CN2H4O, molecular mass 60, International Nonproprietary Name Carbamide.Outward appearance is white crystal
Or powder.It is the product after animal protein metabolism, is typically used as the nitrogenous fertilizer of plant.Urea synthesizes in liver, is that mammality moves
Nitrogenous metabolites inside thing discharge.This metabolic process is referred to as urea cycle.Urea is the first with artificial synthesized inorganic substances
Obtained from organic compound.
Using urea as simultaneously in the selective catalytic reduction denitration device of reducing agent, DCS adjusts institute on metered dispensing unit
The spray gun regulating valve to put into operation, adjusts urea liquid flow, and control denitration exports NOx concentration in acceptability limit.Because spray gun is adjusted
It is inadequate to save valve precision, occur DCS send adjust instruction it is less than normal when, phenomenon that each spray gun regulating valve is failure to actuate causes urea liquid
Owe spray and cross to spray, be unfavorable for safety and stability and the economical operation of unit.
Therefore, it is necessary to design spray gun control system and method in a kind of power plant's denitration reaction.
The content of the invention
The technical problems to be solved by the invention are to provide spray gun control system and method in a kind of power plant's denitration reaction, should
Spray gun control system and method are easy to implement in power plant's denitration reaction, control high sensitivity.
The technical solution of invention is as follows：
Spray gun control system in a kind of power plant's denitration reaction, including signal distributor, amplifier, selector and N number of be used for
Spray the spray gun of urea liquid；N is integer, N >=2；
Spray gun is used to spray urea liquid to the reative cell that denitration reaction occurs；
The controlled quentity controlled variable output end of signal distributor connects with the input of amplifier；The controlled quentity controlled variable input of N number of spray gun is equal
It is connected with the output end of amplifier；The multiplication factor of amplifier is N；
The selection signal output end of signal distributor is connected with the input of selector；N number of output end difference of selector
It is corresponding with the Enable Pin of N number of spray gun to be connected.
Described selector is Shift Selector；Same period, an only output end is defeated in N number of output end of selector
Go out effective enable signal.
Described selector is random selector；Same period, an only output end is defeated in N number of output end of selector
Go out effective enable signal.
N is 5.
There is the valve for being used for controlling spouting liquid in described spray gun；The signal of described controlled quentity controlled variable input input is valve
Door opening amount signal.
Described signal distributor, amplifier and selector is integrated, and amplifier is N times of multiplier in the microprocessor,
Selector is Shift Selector or random selector；Same period, an only output end output in N number of output end of selector
Effective enable signal；There is the valve for being used for controlling spouting liquid in described spray gun；The letter of described controlled quentity controlled variable input input
Number it is valve opening signal.
N is 5.
Spray gun control method in a kind of power plant's denitration reaction, urea liquid is sprayed using N number of spray gun；Each spray gun has
The independent valve for being used to control spouting liquid；The control of ammonia spraying amount is realized by the aperture of control valve；Pass through Shift Selector
And random selector, start any one spray gun valve, only a spray gun implements spray ammonia in each cycle；Other spray guns are in this week
Do not worked in phase；
Actually required ammonia spraying amount is carried in as control signal on the valve of in running order spray gun.
Sprinkling control is implemented using spray gun control system in foregoing power plant's denitration reaction.
Cycle is controlling cycle, i.e., the foregoing clock cycle, is the 2-30 seconds.
Microprocessor is arm processor, single-chip microcomputer or DSP.
Amplifier is realized using operational amplifier.Amplifier can also be digital amplifier, i.e. multiplier.Amplifier can be with
Realize, i.e., realized using multiplying order in software.
In signal distributor, the signal of controlled quentity controlled variable output end output is that signal distributor obtains from the control system of outside
Signal, this is the original control signal of denitrating system.
Signal distributor is integrated with clock generator (or clock) and cycle counter, the letter of selection signal output end output
Number produced by clock signal and cycle counter, such as cycle of clock signal is 2 seconds, and cycle counter follows to clock signal
Ring step-by-step counting；When selector is Shift Selector, it is embodied as the mature technology in digital circuit.The realization of random selector
Also it is prior art.
Selector can be realized by program, circulating register can be used to realize with Shift Selector, in this hair
In bright, N 5, then using the cyclic shift of binary number 10000.
Random selector can also use program to realize, if N is 5, then the random number produced between a 1-6 takes again
It is whole, integer i, then i-th spray gun start (binary number 00001 is moved to the left into i positions to export again).
If after controlled quentity controlled variable is multiplied by N, having exceeded the controlled quentity controlled variable of single spray gun, then start the spray gun work on the spray gun periphery.
In other words, when controlled quentity controlled variable u is less than the umax/N of maximum controlled quentity controlled variable, using the method for one spray gun of independent control,
The fountain height of the spray gun is N*u；
If controlled quentity controlled variable u is more than umax/N, recover original control method, that is, start N bar spray guns and work simultaneously, and every
The fountain height of spray gun is u；Now N number of output end of selector is effective；As high level is effective, then 1 is all；So that all sprays
Rifle all works, and now amplifier fails, i.e., multiplication factor is changed to 1.【These can be set in a program, do a judgement
Then select】
Umax is the maximum fountain height of single spray gun.
Beneficial effect：
Spray gun control system and method in power plant's denitration reaction of the present invention, its core are to adjust a certain branch spray by concentrating
The urea liquid flow of rifle, it can ensure that spray gun urea liquid regulation valve events are timely, straying quatity is accurate, and NOX will not be caused instantaneous
Exceeded and serious relatively low phenomenon, avoids and invents the idle situation in action because controlled quentity controlled variable is too small；Specifically use amplifier pair
Signal is amplified, and a wherein spray gun is selected and controlled using selector, i.e., only starts a spray gun every time.This
Sample, the sensitivity of control can be greatly improved.
Brief description of the drawings
Fig. 1 is the general structure schematic diagram (corresponding embodiment 1) of spray gun control system in power plant's denitration reaction.
Fig. 2 is the general structure schematic diagram (corresponding embodiment 2) of spray gun control system in power plant's denitration reaction.
Embodiment
The present invention is described in further details below with reference to the drawings and specific embodiments：
Embodiment 1：
Such as Fig. 1, spray gun control system and method in a kind of power plant's denitration reaction, including signal distributor, amplifier, selection
Device and 5 spray guns for being used to spray urea liquid；
The controlled quentity controlled variable output end of signal distributor connects with the input of amplifier；The controlled quentity controlled variable input of 5 spray guns is equal
It is connected with the output end of amplifier；The multiplying power of amplifier is 5；
The selection signal output end of signal distributor is connected with the input of selector；5 output ends difference of selector
It is corresponding with the Enable Pin of 5 spray guns to be connected.
Described selector is Shift Selector；Synchronization, an only output end is defeated in 5 output ends of selector
Go out effective enable signal.Now, 5 spray guns are opened successively, according to 1,2,3,4,5,1,2 ..., order open.
Or described selector is random selector；Synchronization, in 5 output ends of selector only one it is defeated
Go out end and export effective enable signal.Now, 5 spray guns are opened at random, and each spray gun has the unlatching of identical probability.
There is the valve for being used for controlling spouting liquid in described spray gun；The signal of described controlled quentity controlled variable input input is valve
Door opening amount signal.
Embodiment 2：Control is implemented using integrated microprocessor, selector and amplifier are real using program (instruction)
It is existing.
As shown in Fig. 2 spray gun control system in a kind of power plant's denitration reaction, including signal distributor, amplifier, selector
With N number of spray gun for being used to spray urea liquid；N is integer, N >=2；
Spray gun is used to spray urea liquid to the reative cell that denitration reaction occurs；
The controlled quentity controlled variable output end of signal distributor connects with the input of amplifier；The controlled quentity controlled variable input of N number of spray gun is equal
It is connected with the output end of amplifier；The multiplication factor of amplifier is N；
The selection signal output end of signal distributor is connected with the input of selector；N number of output end difference of selector
It is corresponding with the Enable Pin of N number of spray gun to be connected.
Described selector is Shift Selector；Same period, an only output end is defeated in N number of output end of selector
Go out effective enable signal.
Described selector is random selector；Same period, an only output end is defeated in N number of output end of selector
Go out effective enable signal.
N is 5.
There is the valve for being used for controlling spouting liquid in described spray gun；The signal of described controlled quentity controlled variable input input is valve
Door opening amount signal.
Described signal distributor, amplifier and selector is integrated, and amplifier is N times of multiplier in the microprocessor,
Selector is Shift Selector or random selector；Same period, an only output end output in N number of output end of selector
Effective enable signal；There is the valve for being used for controlling spouting liquid in described spray gun；The letter of described controlled quentity controlled variable input input
Number it is valve opening signal.
Amplifier can be realized in software, i.e., realized using multiplying order.Selector can be realized by program, with shifting
Digit selector can use circulating register to realize, in the present invention, N 5, then circulated and moved using binary number 10000
Position.
Random selector can also use program to realize, if N is 5, then the random number produced between a 1-6 takes again
It is whole, integer i, then i-th spray gun start (binary number 00001 is moved to the left into i positions to export again).
Using embodiment 2, because it is that all functions can be achieved that need to only use microprocessor, without putting for applied external
Big device and selector, cost is lower, and control is more convenient.
Claims (1)
1. spray gun control method in a kind of power plant's denitration reaction, urea liquid is sprayed using N number of spray gun；Each spray gun has only
The vertical valve for being used to control spouting liquid；The control of ammonia spraying amount is realized by the aperture of control valve；It is characterized in that：
By Shift Selector and random selector, start any one spray gun valve, only a spray gun is implemented in each cycle
Spray ammonia；Other spray guns do not work within the cycle；
Actually required ammonia spraying amount is carried in as control signal on the valve of in running order spray gun；
Sprinkling control is implemented using spray gun control system in following power plant's denitration reaction：Spray gun control system in power plant's denitration reaction
Including signal distributor, amplifier, selector and N number of spray gun for being used to spray urea liquid；N is integer, N >=2；
Spray gun is used to spray urea liquid to the reative cell that denitration reaction occurs；
The controlled quentity controlled variable output end of signal distributor connects with the input of amplifier；The controlled quentity controlled variable input of N number of spray gun is with putting
The output end of big device is connected；The multiplication factor of amplifier is N；
The selection signal output end of signal distributor is connected with the input of selector；N number of output end of selector respectively with it is N number of
The Enable Pin of spray gun is corresponding to be connected；
Described signal distributor, amplifier and selector is integrated, and amplifier is N times of multiplier in the microprocessor, selection
Device is Shift Selector or random selector；Same period, only an output end output is effective in N number of output end of selector
Enable signal；There is the valve for being used for controlling spouting liquid in described spray gun；The signal of described controlled quentity controlled variable input input is
Valve opening signal；
When controlled quentity controlled variable u is less than maximum controlled quentity controlled variable umax/N, using the method for one spray gun of independent control, the fountain height of the spray gun
For N*u；
If controlled quentity controlled variable u is more than umax/N, starts N bar spray guns and work simultaneously, and the fountain height of every spray gun is u；Now select
N number of output end of device is effective；
Umax is the maximum fountain height of single spray gun.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510489545.8A CN105149136B (en) | 2015-08-11 | 2015-08-11 | Spray gun control system and method in a kind of power plant's denitration reaction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510489545.8A CN105149136B (en) | 2015-08-11 | 2015-08-11 | Spray gun control system and method in a kind of power plant's denitration reaction |
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| CN105149136A CN105149136A (en) | 2015-12-16 |
| CN105149136B true CN105149136B (en) | 2018-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510489545.8A Active CN105149136B (en) | 2015-08-11 | 2015-08-11 | Spray gun control system and method in a kind of power plant's denitration reaction |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106215671B (en) * | 2016-09-09 | 2018-10-16 | 中国大唐集团科学技术研究院有限公司华中分公司 | A kind of thermal power plant's denitration spray ammonia control method and device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4063528A (en) * | 1975-06-03 | 1977-12-20 | International Standard Electric Corporation | Arrangement for color marking insulated electrical conductors |
| CN1131063A (en) * | 1994-08-11 | 1996-09-18 | 李东仁 | Fountain apparatus controlled by input sound signal |
| CN201423331Y (en) * | 2009-06-08 | 2010-03-17 | 王琛 | Image-text water curtain |
| CN202909893U (en) * | 2012-09-21 | 2013-05-01 | 葛国萍 | Painting equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100497876B1 (en) * | 2003-07-28 | 2005-06-29 | 주식회사협신랜드스케이프 | Fountain automatic control system |
| CN203644156U (en) * | 2013-11-18 | 2014-06-11 | 西安奥赛福科技有限公司 | Fire processing system for train |
-
2015
- 2015-08-11 CN CN201510489545.8A patent/CN105149136B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4063528A (en) * | 1975-06-03 | 1977-12-20 | International Standard Electric Corporation | Arrangement for color marking insulated electrical conductors |
| CN1131063A (en) * | 1994-08-11 | 1996-09-18 | 李东仁 | Fountain apparatus controlled by input sound signal |
| CN201423331Y (en) * | 2009-06-08 | 2010-03-17 | 王琛 | Image-text water curtain |
| CN202909893U (en) * | 2012-09-21 | 2013-05-01 | 葛国萍 | Painting equipment |
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| CN105149136A (en) | 2015-12-16 |
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