CN103410618B - The low NO of gas turbine dry xfiring optimization method - Google Patents
The low NO of gas turbine dry xfiring optimization method Download PDFInfo
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- CN103410618B CN103410618B CN201310359612.5A CN201310359612A CN103410618B CN 103410618 B CN103410618 B CN 103410618B CN 201310359612 A CN201310359612 A CN 201310359612A CN 103410618 B CN103410618 B CN 103410618B
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Abstract
The invention discloses the low NO of gas turbine dry
xfiring optimization method, the method according to the analysis to combustion position, by realizing the adjustment of control constant D5, PM1, PM4 of DLN-2+ combustion system and blowing clearly air controlling value and adjust in real time, until burning dynamic pressure monitoring result and NO
x, CO discharge be all in suitable numerical value.Burning optimization adjustment can be carried out to adopting the modern gas turbines of premixed combustion technology by the present invention, improving its running state, improving operation stability, alleviate the damage to combustion engine heating part.Avoid because calorific value change, variation of ambient temperature are on the impact of gas turbine operation.
Description
Technical field
The invention belongs to combustion monitoring and analysis technical field, particularly relate to combustion engine combustion pressure pulsation collection analysis and adjustment technology.
Background technique
In order to reduce gas turbine NO
xdischarge, modern advanced gas turbine all adopts premixed combustion technology.Before combustion fuel and oxygen (or air) are pre-mixed uniformly mixed gas, this inflammable mixture is called premixed gas, and the process that premixed gas carries out catching fire, burn in burner is called premixed combustion (premixed combustion).
Although premixed combustion reduces the NO of gas turbine
xdischarge, but due to close to the lean blowout limit, combustion condition easily becomes unstable by the impact of fuel and enviromental parameter, occurs combustion oscillation, affects the safe and stable operation of gas turbine.Combustion instability main manifestations be combustion flame tube pressure violent pulsation, drum or sharp noise.The pressure of this unstable combustion is significantly pulsed, the problem such as tempering, nozzle can be caused flame-out, thus causes unit chaser, the serious scaling loss or the fatigue damage that cause the expensive hot passage parts such as burner, burner inner liner, turbine parts, thus affects working life.
Combustion instability phenomenon adopts the low NO of dry type
xthe major issue of the large-scale combustion engine facing of combustion technology.
Moreover, for China, adopt the low NO of dry type
xthe heavy combustion engine of combustion technology is all import equipment, the low NO of dry type of gas turbine
xfiring optimization technology all rests in equipment supplier's hand, and the user of equipment cannot carry out from Row sum-equal matrix.As the problem such as burner inner liner bulge, combustion component scrappage height of first 9FA type gas turbine introduced of China, all with low NO
xfiring optimization is improper relevant.
There is provided as can be seen here a kind of independently brand-new, the low NO of the dry type of the combustion stability of large-scale gas turbine can be ensured
xfiring optimization scheme is that related domain needs the problem that will solve badly.
Summary of the invention
The present invention is directed to the low NO of existing employing dry type
xthe problem of the large-scale gas turbine combustion instability of combustion technology, and provide a kind of gas turbine dry low NO
xfiring optimization method.The program can carry out burning optimization adjustment to adopting the modern gas turbines of premixed combustion technology, improves its running state, improves operation stability, alleviate the damage to combustion engine heating part.Avoid because calorific value change, variation of ambient temperature are on the impact of gas turbine operation.
In order to achieve the above object, the present invention adopts following technological scheme:
The low NO of gas turbine dry
xfiring optimization method, described adjusting method comprises the steps:
(1) by combustion flame cylinder roasting dynamic pressure monitoring result that combustion pressure pulsation monitoring equipment Real-time Obtaining is correct;
(2) by emission monitoring equipment Real-time Obtaining gas turbine NO
xwith the discharge numerical value of CO;
(3) according to burning dynamic pressure monitoring result and NO
xdischarge numerical value with CO and judge gas turbine combustion situation;
(4) according to analysis to combustion position, by realizing the adjustment of control constant D5, PM1, PM4 of DLN-2+ combustion system and blowing clearly air controlling value and adjust in real time;
(5) step (1) is repeated to step (4), until burning dynamic pressure monitoring result and NO
x, CO discharge be all in suitable numerical value.
In preferred version of the present invention, with the upper and lower adjustment of step-length of 1% ~ 2% in described step (4), adjust D5, PM1, PM4 and blow clearly air controlling value, affecting dynamic pressure fluctuation and NO
xdischarge value, until dynamic pressure fluctuation and NO
x, CO discharge value meets the requirements.
Further, gas turbine is also comprised in described adjusting method from start application of load to fully loaded set-up procedure:
(11) from a certain steady load point, be increase unit at every turn with 10MW, obtain series of stable loading point;
(12) step (1) is repeated to (5), until gas turbine at full capacity at each steady load point.
Further, also comprise in described adjusting method gas turbine from full capacity load shedding to shut down set-up procedure:
(22) from putting at full capacity, be reduce unit at every turn with 10MW, obtain series of stable loading point;
(22) step (1) is repeated to (5) at each steady load point, until gas turbine is shut down.
The present invention, by the burning monitoring of dynamic pressure and analysis, understands and grasp the combustion position of gas turbine, when burning departs from steady running condition point, near flame failure limit or NO
xwhen discharge exceeds standard, by adjusting the air fuel ratio of premixed gas, make it get back in suitable scope, thus keep the stability of burning, make gas turbine stable operation, simultaneously NO
xdischarge meets country and local emission request.
Accompanying drawing explanation
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is gas turbine DLN-2+ gas fuel system schematic diagram.
Embodiment
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
See Fig. 1, it is depicted as existing gas turbine DLN-2+ gas fuel system.This gas fuel system forms by assisting stop valve (ASV), speed ratio valve (SRV), diffusive combustion gas control valve (DGCV), PM4 premixed gas control valve (PM4GCV), PM1 premixed gas control valve (PM1GCV) etc.Regulated the fuel quantity entering D5 fuel nozzle by DGCV control valve, regulated the flow entering PM4 fuel nozzle by PM4GCV control valve, regulated the flow entering PM1 fuel nozzle by PM1GCV control valve.
This system adopts the low NO of dry type
xcombustion technology, in combustion, its combustion condition is easily subject to the impact of fuel and enviromental parameter and becomes unstable, occurs combustion oscillation, affects the safe and stable operation of gas turbine.
For this problem, the scheme that this example provides can depart from steady running condition point in gas turbine combustion, near flame failure limit or NO
xwhen discharge exceeds standard, by adjusting the air fuel ratio of premixed gas, make it get back in suitable scope, thus keep the stability of burning, make gas turbine stable operation, simultaneously NO
xdischarge meets country and local emission request.
This example is as follows for the adjustment process of the DLN-2+ of gas turbine shown in Fig. 1 gas fuel system:
First, a set of special burning dynamic pressure monitoring system (CDM) is installed before firing optimization on gas turbine combustion burner inner liner, by this system, real-time monitoring is carried out to the burning dynamic pressure in gas turbine combustion burner inner liner.
This CDM system comprises multiple dynamic pressure transducer working properly, and carry out exact connect ion with the combustion flame tube of corresponding combustion system respectively, to ensure to obtain accurately burning dynamic pressure monitoring result, effectively avoid the failure of any firing chamber dynamic pressure monitoring, cause the problem that combustion system hardware device damages.This system uses the equipment of the correct demarcation of warp and mutually suitable data processing simultaneously, ensures the correctness of acquisition burning dynamic pressure monitoring result further.
After completing the arranging of burning dynamic pressure monitoring system, can burning dynamic pressure be monitored and be analyzed, and carry out real-time adjustment:
1, by burning dynamic pressure monitoring result that combustion pressure pulsation monitoring equipment Real-time Obtaining gas turbine is correct.
2, by unit pollutant emission monitoring equipment Real-time Obtaining gas turbine NO
xwith the discharge numerical value of CO.
3, adjust gas turbine load, and remain on a certain stationary value, such as setting unit load by unit control system is 150MW.
4, according to burning dynamic pressure monitoring result and NO
xjudge gas turbine combustion situation with CO discharge, such as, require that frequency 90Hz place burning dynamic pressure amplitude can not more than 3psi, NO
xa certain numerical value can not be exceeded, as 30ppm, if burning dynamic pressure amplitude or NO with CO discharge
x, CO discharge value exceeded above-mentioned requirements value, then need to adjust.
5, according to the discriminatory analysis to combustion position, if dynamic pressure fluctuation and NO
xdischarge undesirable, such as exceed 3psi in PM mode frequency 90Hz place burning dynamic pressure amplitude, then can by adjusting the control constant of control system, such as PM Schema control constant FXKSG2_M_n was 16% originally, the upper and lower adjustment of step-length with 1% ~ 2%, as being adjusted to 17% or 15%, impact burning dynamic pressure fluctuation and NO
xdischarge value, until dynamic pressure fluctuation in frequency 90Hz place is less than 3psi, and NO
x, CO discharge value meets the requirements.This basis, to the discriminatory analysis of combustion position, by the adjustment to each control constant, changes D5, PM1, PM4 and blows clearly air controlling value, thus will burn dynamic pressure and NO
x, CO discharge value controls the process in rational scope, is the main Suitable content at each steady load point.
6, first carry out the firing optimization of application of load process, generally from 40MW load, increase 10MW(at every turn and namely increase gas turbine load gradually with each 10MW), obtain series of stable loading point.
As an example, when this step is implemented, the basis of original 150MW load increases 10MW, makes steady load at 160MW, then by step 4,5, make at the burning dynamic pressure of 160MW loading point and NO
x, CO discharge meet the requirements.And then increase 10MW load, make steady load at 170MW, and then by step 4,5, make at the burning dynamic pressure of 170MW loading point and NO
x, CO discharge meet the requirements, so progressively increase load, carry out firing optimization, until gas turbine is at full capacity at each steady load point.
7, repeat step 4 to 6, complete gas turbine from start to fully loaded adjustment work, make gas turbine can both remain the stability of burning in application of load process, simultaneously NO
x, CO discharge value meets the requirements.
8, after gas turbine completes to the work that adjusts at full capacity from start, from full capacity, carry out the adjustment of load shedding process until compressor emergency shutdown, be generally reduce unit with 10MW, reduce gas turbine load gradually, and remain on a certain stationary value.
As an example, when this step is implemented, from 250MW load at full capacity, reduce 10MW load, make set steady at 240MW load, then carry out the adjustment work of step 5, make at the burning dynamic pressure of 240MW loading point and NO
x, CO discharge meet the requirements; And then reduce 10MW, the adjustment work of step 5 is carried out in 230MW loading point; By that analogy, until compressor emergency shutdown, complete the firing optimization of load shedding process.
9, repeat step 4 to 5 and 8, complete the firing optimization work of load shedding process, make gas turbine can both remain the stability of burning in load shedding process, simultaneously NO
x, CO discharge value meets the requirements.
Be below the adjustment situation example to the various control constants of DLN-2+ gaseous combustion system in this example approach, affect combustion condition by the adjustment of these constant values, combustion position is met the demands.
The each operating mode control constant of DLN-2+ gaseous combustion system
SPPM(pattern L) control constant
PPM(pattern H) control constant
PM(pattern M) control constant
More than show and describe basic principle of the present invention, major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (3)
1. the low NO of gas turbine dry
xfiring optimization method, is characterized in that, described adjusting method comprises the steps:
(1) by burning dynamic pressure monitoring result that combustion pressure pulsation monitoring equipment Real-time Obtaining is correct;
(2) by emission monitoring equipment Real-time Obtaining gas turbine NO
xwith the discharge numerical value of CO;
(3) according to burning dynamic pressure monitoring result and NO
xdischarge numerical value with CO and judge gas turbine combustion situation;
(4) according to analysis to combustion position, to D5, PM1, PM4 of DLN-2+ combustion system and blow clearly air controlling value and adjust in real time; The upper and lower adjustment of step-length with 1% ~ 2%, adjusts D5, PM1, PM4 and blows clearly air controlling value, affects dynamic pressure fluctuation and NO
x, CO discharge value, until dynamic pressure fluctuation and NO
x, CO discharge value meets the requirements;
(5) step (1) is repeated to step (4), until burning dynamic pressure monitoring result and NO
x, CO discharge be all in suitable numerical value.
2. the low NO of gas turbine dry according to claim 1
xfiring optimization method, is characterized in that, also comprises gas turbine from start application of load to fully loaded set-up procedure in described adjusting method:
(11) from a certain steady load point, be increase unit at every turn with 10MW, obtain series of stable loading point;
(12) step (1) is repeated to (5), until gas turbine at full capacity at each steady load point.
3. the low NO of gas turbine dry according to claim 1
xfiring optimization method, is characterized in that, also comprise in described adjusting method gas turbine from full capacity load shedding to shut down set-up procedure:
(22) from putting at full capacity, be reduce unit at every turn with 10MW, obtain series of stable loading point;
(22) step (1) is repeated to (5) at each steady load point, until gas turbine is shut down.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107763655B (en) * | 2017-10-31 | 2019-07-05 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | A method of reducing the GE combustion engine firing optimization of exhaust emission |
| CN109268149A (en) * | 2018-08-08 | 2019-01-25 | 华电电力科学研究院有限公司 | A kind of DLN-2.0+ combustion system firing optimization method |
| CN109140493B (en) * | 2018-08-28 | 2019-11-29 | 苏州工业园区蓝天燃气热电有限公司 | A method of reducing the GE combustion engine firing optimization of combustion pulsation and exhaust emission |
| CN109162814B (en) * | 2018-09-03 | 2019-11-26 | 华电电力科学研究院有限公司 | A kind of DLN-2.6 combustion system firing optimization method |
| CN109459245B (en) * | 2018-10-24 | 2024-05-07 | 华电电力科学研究院有限公司 | Portable gas turbine online combustion detection analysis adjustment platform system and diagnosis analysis method thereof |
| CN109779764A (en) * | 2018-12-13 | 2019-05-21 | 华电电力科学研究院有限公司 | It is a kind of based on environment temperature adjust combustion engine pollutant emission optimize and revise method |
| CN109812341A (en) * | 2018-12-31 | 2019-05-28 | 华电电力科学研究院有限公司 | A kind of DLN-2.6+ combustion system firing optimization method using the LVE method of operation |
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