CN102654776A - Smoke denitration ammonia injection amount control method and device - Google Patents
Smoke denitration ammonia injection amount control method and device Download PDFInfo
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- CN102654776A CN102654776A CN2012101124750A CN201210112475A CN102654776A CN 102654776 A CN102654776 A CN 102654776A CN 2012101124750 A CN2012101124750 A CN 2012101124750A CN 201210112475 A CN201210112475 A CN 201210112475A CN 102654776 A CN102654776 A CN 102654776A
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Abstract
The invention discloses a smoke denitration ammonia injection amount control method and device. The smoke denitration ammonia injection amount control method comprises the following steps of: obtaining an offset value of denitration efficiency; calculating a first ammonia injection coefficient corresponding to the offset value of the denitration efficiency; obtaining an offset value of an ammonia escape amount; calculating a second ammonia injection coefficient corresponding to the offset value of the ammonia escape amount; and regulating the ammonia injection amount according to the first ammonia injection coefficient and the second ammonia injection coefficient. Through the smoke denitration ammonia injection amount control method and device, disclosed by the invention, a problem of the ammonia injection amount required by smoke denitration can not be exactly controlled is solved, thus the accuracy of liquid ammonia amount required by the smoke denitration and an effect of the precision are reached, and an effect of diagnosing whether the activity and the operation parameter of a catalyst are reasonable or not is also realized at the same time.
Description
Technical field
The present invention relates to the control field, in particular to a kind of ammonia spraying amount control method and device of denitrating flue gas.
Background technology
Denitrating flue gas is the another major fields of thermal power plant's Chinese Control Industrial Boiler pollutant emission after flue gas desulfurization; It is at present domestic that more what adopt is SCR (Selective Catalytic Reduction is called for short SCR) gas denitrifying technology (being called for short the SCR technology) more.The mode of control denitrating flue gas is for spraying liquefied ammonia in the prior art in reactor, and the regulating loop SAMA figure of this control mode is as shown in Figure 1, wherein,
A: set denitration efficiency (the general requirement is 70%);
B: output violent change (export-restriction of the setting value of outlet flue gas NOx content and measured value composition regulating loop is between 0.7～1.3, as the modified value of ammonia spraying amount regulating loop);
C: reactor inlet NOx conversion concentration;
D: reactor outlet NOx conversion concentration.
But; The mode that this kind carries out denitrating flue gas forms (the boiler total blast volume that passes through that has converts) because the flue gas flow value converts through boiler load; Non-measured data; And the exhaust gas volumn in the reactor is not divided equally, and this deviation of 2 will cause Theoretical Calculation to lose standard to a certain extent, and directly influence needs the calculating of ammonia amount; SCR reactor inlet, outlet NOx concentration are flue gas automatic monitored control system (Continuous Emission Monitoring System; Be called for short CEMS) table meter measured value; There is certain hysteresis quality in data acquisition; And there is error to a certain degree in CEMS table instrumentation amount, and there is certain influence in automatic adjusting; Distribute can be very uneven for flue gas flow rate in the SCR reactor, so the sampling spot of CEMS instrument may not possess representativeness, there is certain influence in automatic adjusting yet.And; The ammonia (HN3) that injects is when bringing denitrating flue gas; Also can produce negative effect, promptly the catalyzer in the device can also make the SO2 oxidation in the flue gas generate SO3, and ammonia (HN3 of the escape) reaction of not participating in reaction in SO3 and the SCR denitrification process generates ammonium hydrogen sulfate (NH4HSO4).Ammonium hydrogen sulfate has viscosity, hydroscopicity and metal protection at low temperatures; Flue gas NH4HSO4 of gaseous state below 180 ℃ the time can condense on the heat transfer element of cold section of the air preheater in downstream down; Form salification and fouling; Thereby influence the normal operation and the life-span of air preheater, it also can also cause corrosion harmfulness etc. to the catalytic bed metal supporting frames.Have the research test result to show that HN3 escape amount reaches about 2ppm, its resistance increased about 30% after air preheater moved half a year; HN3 escape amount is increased to 3ppm, and its resistance increases approximately 50% after air preheater operation half a year, not only takes electricity but also have the allotted portion of life reduced by having or getting more than one deserves, and seriously increases production run, maintenance cost.
Therefore, for the owner who uses the SCR denitration technology, it is important how to use minimum (leveling off to 0) HN3 escape amount to satisfy the problem ten minutes that reduces the NOx discharging; Concerning the reliability service of SCR unit, to the importance of the escaping of ammonia rate restriction not second to restriction than NOx conversion ratio.
Problem to can't accurately controlling the required ammonia spraying amount of denitrating flue gas in the correlation technique does not propose effective solution at present as yet.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of ammonia spraying amount control method and device of denitrating flue gas, to solve the problem that can't accurately control the required ammonia spraying amount of denitrating flue gas in the prior art.
To achieve these goals, according to an aspect of the present invention, a kind of ammonia spraying amount control method of denitrating flue gas is provided, has comprised: the deviate of obtaining denitration efficiency; Calculate the first corresponding spray ammonia coefficient of deviate of denitration efficiency; Obtain the deviate of amount of ammonia slip; Calculate the second corresponding spray ammonia coefficient of deviate of amount of ammonia slip; And according to the first spray ammonia coefficient and the second spray ammonia coefficient adjustment ammonia spraying amount.
Further, the deviate of obtaining denitration efficiency comprises: detect the concentration of the oxides of nitrogen in flue gas denitration reactor exit, as first concentration; Detect the concentration of the oxides of nitrogen of flue gas denitration reactor porch, as second concentration; Calculate actual denitration efficiency according to first concentration and second concentration; And the deviate of calculating denitration efficiency according to actual denitration efficiency and target denitration efficiency.
Further, the deviate of obtaining amount of ammonia slip comprises: the actual amount of ammonia slip that detects the flue gas denitration reactor exit; And the deviate of calculating amount of ammonia slip according to actual amount of ammonia slip and target amount of ammonia slip.
Further, the first spray ammonia coefficient that calculates the deviate correspondence of denitration efficiency comprises: the deviate of denitration efficiency is carried out PI calculate, obtain the first spray ammonia coefficient.
Further, the second spray ammonia coefficient that calculates the deviate correspondence of amount of ammonia slip comprises: the deviate of amount of ammonia slip is carried out PI calculate, obtain the second spray ammonia coefficient.
Further, comprise according to the first spray ammonia coefficient and the second spray ammonia coefficient adjustment ammonia spraying amount: the product that calculates the first spray ammonia coefficient and the second spray ammonia coefficient; And according to the product adjusting ammonia spraying amount that calculates.
To achieve these goals, according to a further aspect in the invention, a kind of ammonia spraying amount control device of denitrating flue gas is provided, this control device is used to carry out the ammonia spraying amount control method of any one denitrating flue gas that foregoing of the present invention provides.
To achieve these goals, according to a further aspect in the invention, a kind of ammonia spraying amount control device of denitrating flue gas is provided, has comprised: first acquiring unit is used to obtain the deviate of denitration efficiency; First computing unit is connected with first acquiring unit, is used to calculate the first corresponding spray ammonia coefficient of deviate of denitration efficiency; Second acquisition unit is used to obtain the deviate of amount of ammonia slip; Second computing unit is connected with second acquisition unit, is used to calculate the second corresponding spray ammonia coefficient of deviate of amount of ammonia slip; And control module, be connected respectively with second computing unit with first computing unit, be used for according to the first spray ammonia coefficient and the second spray ammonia coefficient adjustment ammonia spraying amount.
Further, first acquiring unit comprises: first detection sub-unit is used to detect the concentration of the oxides of nitrogen in flue gas denitration reactor exit, as first concentration; Second detection sub-unit is used to detect the concentration of the oxides of nitrogen of flue gas denitration reactor porch, as second concentration; First computation subunit is connected respectively with second detection sub-unit with first detection sub-unit, is used for calculating actual denitration efficiency according to first concentration and second concentration; And second computation subunit, be connected with first computation subunit, be used for calculating the deviate of denitration efficiency according to actual denitration efficiency and target denitration efficiency.
Further, second acquisition unit comprises: the 3rd detection sub-unit is used to detect the actual amount of ammonia slip in flue gas denitration reactor exit; And audit of economy operator unit, be connected with the 3rd detection sub-unit, be used for deviate according to actual amount of ammonia slip and target amount of ammonia slip calculating amount of ammonia slip.
Further, first computing unit comprises: a PI computing module, and be used for that the deviate of denitration efficiency is carried out PI and calculate, obtain the first spray ammonia coefficient.
Further, second computing unit comprises: the 2nd PI computing module, and be used for that the deviate of amount of ammonia slip is carried out PI and calculate, obtain the second spray ammonia coefficient.
Further, control module comprises: the 4th computation subunit, be connected respectively with second computing unit with first computing unit, and be used to calculate the product of the first spray ammonia coefficient and the second spray ammonia coefficient; And the adjusting subelement, be connected with the 4th computation subunit, be used for regulating ammonia spraying amount according to the product that calculates.
Through the present invention, adopt the deviate of obtaining denitration efficiency; Calculate the first corresponding spray ammonia coefficient of deviate of denitration efficiency; Obtain the deviate of amount of ammonia slip; Calculate the second corresponding spray ammonia coefficient of deviate of amount of ammonia slip; And according to the first spray ammonia coefficient and the second spray ammonia coefficient adjustment ammonia spraying amount; Through calculate the first corresponding spray ammonia coefficient according to the denitration efficiency deviate of flue gas denitrification system; Calculate the second corresponding spray ammonia coefficient according to amount of ammonia slip; According to the first spray ammonia coefficient and the second spray ammonia coefficient ammonia spraying amount is regulated simultaneously; Realized having solved in the prior art and can't accurately having controlled the problem of the required ammonia spraying amount of denitrating flue gas, and then reached the accuracy of the required liquefied ammonia amount of raising denitrating flue gas and the effect of degree of accuracy guaranteeing to control amount of ammonia slip when denitration efficiency meets the demands.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the SAMA figure according to the denitrating flue gas regulating loop of correlation technique;
Fig. 2 is the synoptic diagram according to the ammonia spraying amount control device of the denitrating flue gas of the embodiment of the invention;
Fig. 3 is the process flow diagram according to the ammonia spraying amount control method of the denitrating flue gas of the embodiment of the invention; And
Fig. 4 is the SAMA figure according to the denitrating flue gas regulating loop of the embodiment of the invention.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.Below with reference to accompanying drawing and combine embodiment to specify the present invention.
The embodiment of the invention provides a kind of ammonia spraying amount control device of denitrating flue gas; Fig. 2 is the synoptic diagram according to the ammonia spraying amount control device of the denitrating flue gas of the embodiment of the invention; As shown in Figure 2, the control device of this embodiment comprises first acquiring unit 10, first computing unit 20, second acquisition unit 30, second computing unit 40 and control module 50.
First acquiring unit 10 is used to obtain the deviate of the denitration efficiency and the target denitration efficiency of flue gas denitrification system; First computing unit 20 is connected with first acquiring unit 10; Be used for when first acquiring unit 10 gets access to the deviate of denitration efficiency, calculating the corresponding spray ammonia coefficient of deviate of denitration efficiency, as the first spray ammonia coefficient; Second acquisition unit 30 is used to obtain the actual amount of ammonia slip of flue gas denitrification system and the deviate of target amount of ammonia slip; Second computing unit 40 is connected with second acquisition unit 30; Be used for when second acquisition unit 30 gets access to the deviate of amount of ammonia slip, calculating the corresponding spray ammonia coefficient of deviate of amount of ammonia slip, as the second spray ammonia coefficient; Control module 50 is connected respectively with second computing unit 40 with first computing unit 20; So that the ammonia spraying amount control device issues steering order according to the first spray ammonia coefficient and the second spray ammonia coefficient to liquefied ammonia flusher in the flue gas denitrification system automatically, the liquefied ammonia injected volume of liquefied ammonia flusher is regulated control.
The control device of the embodiment of the invention is through calculating the first corresponding spray ammonia coefficient according to the denitration efficiency deviate of flue gas denitrification system; Calculate the second corresponding spray ammonia coefficient according to amount of ammonia slip; According to the first spray ammonia coefficient and the second spray ammonia coefficient ammonia spraying amount is regulated simultaneously; Realized guaranteeing to control amount of ammonia slip when denitration efficiency meets the demands; Solved in the prior art and can't accurately control the problem of the required ammonia spraying amount of denitrating flue gas, and then reached the accuracy of the required liquefied ammonia amount of raising denitrating flue gas and the effect of degree of accuracy.
Wherein, First acquiring unit 10 comprises first detection sub-unit, second detection sub-unit, first computation subunit and second computation subunit; Particularly, first detection sub-unit is used to detect the concentration of the oxides of nitrogen in flue gas denitration reactor exit, as first concentration; Second detection sub-unit is used to detect the concentration of the oxides of nitrogen of flue gas denitration reactor porch, as second concentration; First computation subunit is connected respectively with second detection sub-unit with first detection sub-unit; Be used for calculating actual denitration efficiency by first concentration and second concentration;
second computation subunit is connected with first computation subunit; Be used for when first computation subunit calculates actual denitration efficiency, the deviate of calculating actual denitration efficiency and target denitration efficiency is as the denitration efficiency deviate; First computing unit 20 can be pi regulator, calculates through the denitration efficiency deviate being carried out PI, obtains the corresponding spray ammonia coefficient of denitration efficiency deviate, as the first spray ammonia coefficient.
Second acquisition unit 30 comprises the 3rd detection sub-unit and audit of economy operator unit; Particularly; The 3rd detection sub-unit is used to detect the actual amount of ammonia slip in flue gas denitration reactor exit, the LaserGasII SP Monitor monochromatic light road laser gas detector that the 3rd detection sub-unit can use Norway NEO company to produce; Audit of economy operator unit is connected with the 3rd detection sub-unit, is used for when the 3rd detection sub-unit detects actual amount of ammonia slip, calculates the deviate of the deviate of actual amount of ammonia slip and target amount of ammonia slip as amount of ammonia slip; Second computing unit 40 also can be pi regulator, calculates through the deviate of amount of ammonia slip being carried out PI, obtains the corresponding spray ammonia coefficient of deviate of amount of ammonia slip, as the second spray ammonia coefficient.
Control module 50 can comprise the 4th computation subunit and regulate subelement; Wherein, The 4th computation subunit be connected respectively with second computing unit with first computing unit (the 4th computation subunit also can be to be connected respectively with the pi regulator of first computing unit and the pi regulator of second computing unit); When calculating the first spray ammonia coefficient and the second spray ammonia coefficient respectively at first computing unit and second computing unit, calculate the product of the first spray ammonia coefficient and the second spray ammonia coefficient, regulate ammonia spraying amount by regulating subelement according to the product value that calculates then; Illustrate; If in flue gas denitration reactor, spray liquefied ammonia according to a unit quantity when liquefied ammonia flusher of flue gas denitrification system is initial, when the first spray ammonia coefficient that calculates is that 1.2, the second spray ammonia coefficients are 0.8 o'clock; Regulate subelement and can issue the order of spraying liquefied ammonia to the liquefied ammonia flusher according to 0.96 unit quantity; That is, the liquefied ammonia flusher sprays liquefied ammonia according to 0.96 unit quantity in flue gas denitration reactor, is implemented in to guarantee to control when denitration efficiency meets the demands amount of ammonia slip.
The embodiment of the invention also provides a kind of ammonia spraying amount control method of denitrating flue gas; This control method can be carried out through the control device that the above embodiment of the present invention provided; Fig. 3 is the process flow diagram according to the ammonia spraying amount control method of the denitrating flue gas of the embodiment of the invention; As shown in Figure 3, the control method of this embodiment comprises the steps that S302 is to step S310:
S302: the deviate of obtaining the denitration efficiency and the target denitration efficiency of flue gas denitrification system;
S304: when step S302 gets access to the deviate of denitration efficiency, calculate the corresponding spray ammonia coefficient of deviate of denitration efficiency, as the first spray ammonia coefficient;
S306: obtain the actual amount of ammonia slip of flue gas denitrification system and the deviate of target amount of ammonia slip;
S308: when step S306 gets access to the deviate of amount of ammonia slip, calculate the corresponding spray ammonia coefficient of deviate of amount of ammonia slip, as the second spray ammonia coefficient;
S310: the liquefied ammonia injected volume of liquefied ammonia flusher in the flue gas denitrification system is regulated control according to the first spray ammonia coefficient and the second spray ammonia coefficient.In this step S310, the ammonia spraying amount control device issues steering order according to the first spray ammonia coefficient and the second spray ammonia coefficient to liquefied ammonia flusher in the flue gas denitrification system automatically, and the liquefied ammonia injected volume of liquefied ammonia flusher is regulated control.
The control method of the embodiment of the invention is through calculating the first corresponding spray ammonia coefficient according to the denitration efficiency deviate of flue gas denitrification system; Calculate the second corresponding spray ammonia coefficient according to amount of ammonia slip; According to the first spray ammonia coefficient and the second spray ammonia coefficient ammonia spraying amount is regulated simultaneously; Realized guaranteeing to control amount of ammonia slip when denitration efficiency meets the demands; Solved in the prior art and can't accurately control the problem of the required ammonia spraying amount of denitrating flue gas, and then reached the accuracy of the required liquefied ammonia amount of raising denitrating flue gas and the effect of degree of accuracy.
Wherein, step S302 can realize through following steps when obtaining the deviate of denitration efficiency:
Detect through the concentration of a nitrous oxides concentration detector, as first concentration the oxides of nitrogen in flue gas denitration reactor exit; Detect through the concentration of another nitrous oxides concentration detector, as second concentration the oxides of nitrogen of flue gas denitration reactor porch; Calculate actual out of stock efficient according to following formula:
At last, the deviate of calculating actual denitration efficiency and target denitration efficiency is as the denitration efficiency deviate;
Step S304 can calculate through the denitration efficiency deviate being carried out PI, obtains the corresponding spray ammonia coefficient of denitration efficiency deviate, as the first spray ammonia coefficient.
Step S306 can realize through following steps when obtaining the deviate of amount of ammonia slip:
Detect the LaserGasII SPMonitor monochromatic light road laser gas detector that the amount of ammonia slip pick-up unit can use Norway NEO company to produce through the actual amount of ammonia slip of amount of ammonia slip pick-up unit to the flue gas denitration reactor exit; When detecting actual amount of ammonia slip, calculate the deviate of the deviate of actual amount of ammonia slip and target amount of ammonia slip as amount of ammonia slip.
Step S308 can calculate through the deviate of amount of ammonia slip being carried out PI, obtains the corresponding spray ammonia coefficient of deviate of amount of ammonia slip, as the second spray ammonia coefficient.
Step S310 regulates control according to the first spray ammonia coefficient and the second spray ammonia coefficient to the liquefied ammonia injected volume of liquefied ammonia flusher in the flue gas denitrification system and can realize through following steps:
When step S304 and step S308 calculate the first spray ammonia coefficient and the second spray ammonia coefficient respectively; Calculate the product of the first spray ammonia coefficient and the second spray ammonia coefficient; By regulating ammonia spraying amount, illustrate then, if in flue gas denitration reactor, spray liquefied ammonia according to a unit quantity when liquefied ammonia flusher of flue gas denitrification system is initial according to the product value that calculates; When the first spray ammonia coefficient that calculates is 1.2; The second spray ammonia coefficient is 0.8 o'clock, can control the liquefied ammonia flusher and in flue gas denitration reactor, spray liquefied ammonia according to 0.96 unit quantity, is implemented in and guarantees to control when denitration efficiency meets the demands amount of ammonia slip.
Wherein, as shown in Figure 4 according to the SAMA figure of the denitrating flue gas regulating loop of the control method of the embodiment of the invention.
From above description; Can find out; The present invention is through controlling and regulate the injected volume of liquefied ammonia according to denitration efficiency deviate and amount of ammonia slip deviate simultaneously; Realized having realized the input of automatic control liquefied ammonia simultaneously, improved the automatic control level of denitrating flue gas and the degree of accuracy that liquefied ammonia is thrown in guaranteeing to control amount of ammonia slip in 0～2ppm scope when denitration efficiency meets the demands.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the memory storage and carry out, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize by calculation element.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. the ammonia spraying amount control method of a denitrating flue gas is characterized in that, comprising:
Obtain the deviate of denitration efficiency;
Calculate the first corresponding spray ammonia coefficient of deviate of said denitration efficiency;
Obtain the deviate of amount of ammonia slip;
Calculate the second corresponding spray ammonia coefficient of deviate of said amount of ammonia slip; And
According to said first spray ammonia coefficient and the said second spray ammonia coefficient adjustment ammonia spraying amount.
2. control method according to claim 1 is characterized in that, the deviate of obtaining denitration efficiency comprises:
Detect the concentration of the oxides of nitrogen in flue gas denitration reactor exit, as first concentration;
Detect the concentration of the oxides of nitrogen of said flue gas denitration reactor porch, as second concentration;
Calculate actual denitration efficiency according to said first concentration and said second concentration; And
Calculate the deviate of said denitration efficiency according to said actual denitration efficiency and target denitration efficiency.
3. control method according to claim 1 is characterized in that, the deviate of obtaining amount of ammonia slip comprises:
Detect the actual amount of ammonia slip in flue gas denitration reactor exit; And
Calculate the deviate of said amount of ammonia slip according to said actual amount of ammonia slip and target amount of ammonia slip.
4. control method according to claim 1 is characterized in that, the first corresponding spray ammonia coefficient of deviate that calculates said denitration efficiency comprises:
The deviate of said denitration efficiency is carried out PI calculate, obtain the said first spray ammonia coefficient.
5. control method according to claim 1 is characterized in that, the second corresponding spray ammonia coefficient of deviate that calculates said amount of ammonia slip comprises:
The deviate of said amount of ammonia slip is carried out PI calculate, obtain the said second spray ammonia coefficient.
6. control method according to claim 1 is characterized in that, comprises according to said first spray ammonia coefficient and the said second spray ammonia coefficient adjustment ammonia spraying amount:
Calculate the product of said first spray ammonia coefficient and the said second spray ammonia coefficient; And
Regulate said ammonia spraying amount according to the product that calculates.
7. the ammonia spraying amount control device of a denitrating flue gas is characterized in that, comprising:
First acquiring unit is used to obtain the deviate of denitration efficiency;
First computing unit is connected with said first acquiring unit, is used to calculate the first corresponding spray ammonia coefficient of deviate of said denitration efficiency;
Second acquisition unit is used to obtain the deviate of amount of ammonia slip;
Second computing unit is connected with said second acquisition unit, is used to calculate the second corresponding spray ammonia coefficient of deviate of said amount of ammonia slip; And
Control module is connected respectively with said second computing unit with said first computing unit, is used for according to said first spray ammonia coefficient and the said second spray ammonia coefficient adjustment ammonia spraying amount.
8. control device according to claim 7 is characterized in that, said first acquiring unit comprises:
First detection sub-unit is used to detect the concentration of the oxides of nitrogen in flue gas denitration reactor exit, as first concentration;
Second detection sub-unit is used to detect the concentration of the oxides of nitrogen of said flue gas denitration reactor porch, as second concentration;
First computation subunit is connected respectively with said second detection sub-unit with said first detection sub-unit, is used for calculating actual denitration efficiency according to said first concentration and said second concentration; And
Second computation subunit is connected with said first computation subunit, is used for calculating according to said actual denitration efficiency and target denitration efficiency the deviate of said denitration efficiency.
9. control device according to claim 7 is characterized in that, said second acquisition unit comprises:
The 3rd detection sub-unit is used to detect the actual amount of ammonia slip in flue gas denitration reactor exit; And
Audit of economy operator unit is connected with said the 3rd detection sub-unit, is used for calculating according to said actual amount of ammonia slip and target amount of ammonia slip the deviate of said amount of ammonia slip.
10. control device according to claim 7 is characterized in that, said first computing unit comprises:
The one PI computing module is used for that the deviate of said denitration efficiency is carried out PI and calculates, and obtains the said first spray ammonia coefficient.
11. control device according to claim 7 is characterized in that, said second computing unit comprises:
The 2nd PI computing module is used for that the deviate of said amount of ammonia slip is carried out PI and calculates, and obtains the said second spray ammonia coefficient.
12. control device according to claim 7 is characterized in that, said control module comprises:
The 4th computation subunit is connected respectively with said second computing unit with said first computing unit, is used to calculate the product of said first spray ammonia coefficient and the said second spray ammonia coefficient; And
Regulate subelement, be connected, be used for regulating said ammonia spraying amount according to the product that calculates with said the 4th computation subunit.
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| CN104793652B (en) * | 2015-04-21 | 2018-01-26 | 中电投河南电力有限公司技术信息中心 | A kind of ammonia spraying amount adjusting method and system based on load scheduling curve |
| CN104793652A (en) * | 2015-04-21 | 2015-07-22 | 中电投河南电力有限公司技术信息中心 | Load dispatch curve based ammonia injection quantity adjustment method and system |
| CN104801180A (en) * | 2015-04-21 | 2015-07-29 | 中电投河南电力有限公司技术信息中心 | Ammonia spraying amount control method and system |
| CN105045089A (en) * | 2015-06-19 | 2015-11-11 | 大唐华银电力股份有限公司金竹山火力发电分公司 | Boiler denitration control method based on outlet NOx content control and system thereof |
| CN105021773A (en) * | 2015-07-13 | 2015-11-04 | 南通亚泰工程技术有限公司 | Ammonia escape analytical equipment of SCR system and application method of equipment |
| CN105866338B (en) * | 2016-04-25 | 2018-06-29 | 国网天津市电力公司 | A kind of Novel SCR denitrification apparatus efficiency calculation method |
| CN105866338A (en) * | 2016-04-25 | 2016-08-17 | 国网天津市电力公司 | Efficiency calculation method for novel SCR (Selective Catalytic Reduction) denitration device |
| CN106799123B (en) * | 2017-02-22 | 2019-10-11 | 上海龙净环保科技工程有限公司 | A kind of control method and its control device of denitrification apparatus ammonia spraying amount |
| CN106799123A (en) * | 2017-02-22 | 2017-06-06 | 上海龙净环保科技工程有限公司 | The control method and its control device of a kind of denitrification apparatus ammonia spraying amount |
| CN106994303A (en) * | 2017-05-27 | 2017-08-01 | 南京化学工业园热电有限公司 | Denitration SCR sprays ammonia control system and control method |
| CN106994303B (en) * | 2017-05-27 | 2019-10-29 | 南京化学工业园热电有限公司 | Denitration SCR sprays ammonia control system and control method |
| CN107551774A (en) * | 2017-10-18 | 2018-01-09 | 华润电力湖北有限公司 | A kind of denitration control method and system for thermal power plant |
| CN108380043A (en) * | 2018-02-12 | 2018-08-10 | 南京博沃科技发展有限公司 | A kind of SCR denitration device subregion spray ammonia adjustment control method |
| CN109236427B (en) * | 2018-09-14 | 2020-11-03 | 国家能源投资集团有限责任公司 | Ammonia spraying control method and device for SCR system, storage medium and processor |
| CN109236427A (en) * | 2018-09-14 | 2019-01-18 | 国家能源投资集团有限责任公司 | The spray ammonia control method and device of SCR system |
| CN109833773A (en) * | 2019-03-08 | 2019-06-04 | 东方电气集团东方锅炉股份有限公司 | A kind of NO_x Reduction by Effective ammonia flow accuracy control method |
| CN109833773B (en) * | 2019-03-08 | 2021-05-04 | 东方电气集团东方锅炉股份有限公司 | Efficient denitration ammonia flow accurate control method |
| WO2021082828A1 (en) * | 2019-10-28 | 2021-05-06 | 国家电投集团远达环保工程有限公司重庆科技分公司 | Selective catalytic reduction denitrification device and method |
| CN111905539A (en) * | 2020-07-23 | 2020-11-10 | 天津国电津能滨海热电有限公司 | Boiler denitration ammonia injection automatic adjustment and optimization method and system |
| CN112191101A (en) * | 2020-09-03 | 2021-01-08 | 苏州西热节能环保技术有限公司 | Based on NOxAmmonia spraying grid leveling method for quickly measuring ammonia escape concentration |
| CN112191101B (en) * | 2020-09-03 | 2023-02-17 | 苏州西热节能环保技术有限公司 | Based on NO x Ammonia spraying grid leveling method for quickly measuring ammonia escape concentration |
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