CN109579054A - A kind of gas turbine combustion method of adjustment based on flame temperature control - Google Patents
A kind of gas turbine combustion method of adjustment based on flame temperature control Download PDFInfo
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- CN109579054A CN109579054A CN201811420208.3A CN201811420208A CN109579054A CN 109579054 A CN109579054 A CN 109579054A CN 201811420208 A CN201811420208 A CN 201811420208A CN 109579054 A CN109579054 A CN 109579054A
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- flame temperature
- combustion chamber
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- concentration
- combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
- F23R3/52—Toroidal combustion chambers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a kind of gas turbine combustion methods of adjustment based on flame temperature control, comprising the following steps: adjusts the interior inscription of loop flame temperature T of combustion chambernomC, the control interval of inner ring flame temperature is made to be less than or equal to default smallest interval；PX36, NOx or CO concentration of combustion chamber smoke are not above permissible value；Adjust outer inscription of loop flame temperature TnomA, so that the control interval of outer ring flame temperature is less than or equal to default smallest interval, and PX36, NOx or CO concentration of combustion chamber smoke is made to be not above permissible value；Then pass through interior inscription of loop flame temperature TnomCAnd outer inscription of loop flame temperature TnomASet the outer ring flame temperature and inner ring flame temperature of combustion chamber, complete the gas turbine combustion controlled based on flame temperature adjustment, this method can guarantee that combustion chamber under the premise of low NOx drainage, low burn burn driven dynamic pressure fluctuation and do not stop working, is kept compared with high burning efficiency.
Description
Technical field
The invention belongs to combustion monitoring and analysis technical fields, are related to a kind of gas turbine combustion based on flame temperature control
Burn method of adjustment.
Background technique
At present there are mainly three types of the methods of control gas turbine NOx emission, it may be assumed that 1, penetrating water or water steaming into combustion chamber
Gas inhibits to generate thermal NO x to reduce the temperature of diffusion combustion flame；2, it is utilized in the waste heat boiler after combustion chamber
Selective catalytic reduction (SCR) technology removes NOx from combustion product；3, using dry type low pollution (DLE) combustion technology, that is, exist
It before fuel enters combustion zone, uniformly mixes with excess air, burns subsequently into combustion zone in advance, to reach control combustion
The purpose burnt temperature, reduce NOx emission.
It using dry type low pollution (DLE) though combustion technology is costly, is most widely used, it is also the brightest to obtain effect
It is aobvious.
The firing optimization of DLE combustion technology is that a searching gas turbine being capable of safe and stable, efficient operation boundary mistake
Journey.It is carried out usually after environment and fuel element variation, unit degradation, combustion chamber transformation or when new machine puts into operation.
During firing optimization, change burning temperature by changing fuel-air stoichiometric ratio within the scope of full load
Degree, control NOx, CO discharge and burning driven dynamic pressure fluctuation are in allowed limits.
The fuel air ratio of the combustion chamber DLE is in close proximity to the lean blowout limit, therefore dynamic pressure caused by combustion instability
Pressure oscillation is this kind of burner common problem.
It can be seen that for this kind of combustion chamber, guarantee to burn driven dynamic pressure fluctuation and not flame-out in low NOx drainage, low burn
Under the premise of, holding is one compared with high burning efficiency and needs urgent problem to be solved.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, a kind of combustion based on flame temperature control is provided
Gas-turbine firing optimization method, this method can guarantee that combustion chamber burns driven dynamic pressure fluctuation in low NOx drainage, low burn and do not stop working
Under the premise of, it keeps compared with high burning efficiency.
In order to achieve the above objectives, the gas turbine combustion method of adjustment of the present invention based on flame temperature control includes
Following steps:
1) by the average flame temperature T of combustion chamberflmaveControl is in TflmpctEqual to 50%；
2) it keeps total fuel quantity of combustion chamber and outer ring fuel quantity constant, makes interior ring flame temperature by increasing inner ring fuel quantity
Degree is gradually increased with fixed amplitude, until PX36, NOx or CO concentration of combustion chamber smoke are more than that limit value or ABAL start, by this
When ring flame temperature as inner ring highest flame temperature TmaxC, wherein the temperature amplification of interior ring flame is Δ TMaxC；
3) it keeps total fuel quantity of combustion chamber and outer ring fuel quantity constant, makes interior ring flame temperature by reducing inner ring fuel quantity
Degree is gradually decreased with fixed amplitude, until PX36, NOx or CO concentration of combustion chamber smoke are more than that limit value or ABAL start, by this
When ring flame temperature as inner ring minimum flame temperatures TminC, wherein the temperature drop of interior ring flame is Δ TminC；
4) T is calculatedmaxCWith TminCDifference, and using the result of calculating as the control interval of inner ring flame temperature, when interior ring fire
When the control interval of flame temperature is greater than default smallest interval, then pass through temperature amplification Δ TMaxCWith temperature drop Δ TminCDifference pair
Current inner ring flame temperature is modified, and using revised default inner ring flame temperature as the interior inscription of loop of combustion chamber fire
Flame temperature TnomC, then judge whether PX36, NOx or CO concentration of combustion chamber smoke are more than permissible value, work as combustion chamber smoke again
PX36, NOx or CO concentration be more than permissible value when, then go to step 2)；When PX36, NOx or CO concentration of combustion chamber smoke do not have
When having more than permissible value, then step 5) is gone to；
5) the interior inscription of loop flame temperature T of the combustion chamber obtained according to step 4)nomCInner ring fuel quantity is reset, then
It keeps total fuel quantity constant, outer ring flame temperature is gradually increased with fixed amplitude by increasing outer ring fuel quantity, until burning
PX36, NOx or CO concentration of room smoke evacuation are more than that limit value or ABAL start, and record ring flame temperature T at this timemaxA, wherein outer ring
The temperature amplification Δ T of flamemaxA；
6) it keeps total fuel quantity of combustion chamber and inner ring fuel quantity constant, makes interior ring flame temperature by reducing outer ring fuel quantity
Degree is gradually decreased with fixed amplitude, until PX36, NOx or CO concentration of combustion chamber smoke are more than that limit value or ABAL start, by this
When ring flame temperature be outer ring minimum flame temperatures TminA, wherein the temperature drop of interior ring flame is Δ TminA, the sub- operating condition
For minA.
7) T is calculatedmaxAWith TminADifference work as outer ring fire and using the result of calculating as the control interval of outer ring flame temperature
When the control interval of flame temperature is greater than default smallest interval, then pass through Δ TmaxAWith Δ TminADifference amendment current preset outer ring
Flame temperature, and using revised outer ring flame temperature as outer inscription of loop flame temperature TnomA, then determine combustion chamber smoke
Whether PX36, NOx or CO concentration are more than permissible value, when PX36, NOx or CO concentration of combustion chamber smoke are more than permissible value, then
Go to step 5)；When PX36, NOx or CO concentration of combustion chamber smoke are not above permissible value, then step 8) is gone to；
8) pass through interior inscription of loop flame temperature TnomCAnd outer inscription of loop flame temperature TnomASet the outer ring flame temperature of combustion chamber
Degree and inner ring flame temperature complete the gas turbine combustion controlled based on flame temperature adjustment.
Suitable for combustion chamber B combustion mode, BC/2 combustion mode, BC combustion mode, AB combustion mode and ABC burning mould
Formula.
When under the ABC combustion mode of combustion chamber, flame temperature is adjusted by control amount of water sprayed.
Further include: average flame controlling curve, the control of outer ring flame temperature for obtaining all combustion mode lower combustion chamber are bent
Line and inner ring flame temperature controlling curve.
Step 1) further include: judge NOx, CO concentration of combustion chamber smoke and whether T48 be more than limit value, when NOx concentration or
When T48 is more than limit value, then middle ring fuel quantity is reduced；When CO concentration is more than limit value, then increase middle ring fuel quantity, until combustion chamber
Until NOx, CO concentration and T48 of smoke evacuation are no more than limit value.
The invention has the following advantages:
Gas turbine combustion method of adjustment of the present invention based on flame temperature control when specific operation, is passing through tune
Whole interior inscription of loop flame temperature makes the control interval of interior ring flame be less than or equal to default smallest interval, while making combustion chamber smoke
PX36, NOx or CO concentration be no more than permissible value；Simultaneously by adjusting interior inscription of loop flame temperature, make outer ring flame temperature
Control interval is less than or equal to default smallest interval, while PX36, NOx or CO concentration of combustion chamber smoke being made to be no more than permissible value,
To under the premise of low NOx drainage, low burn burn driven dynamic pressure fluctuation and do not stop working, keep higher burning effect in guarantee combustion chamber
Rate.By the present invention in that flame temperature controls in the range of setting, so that good stable burning nargin range is obtained, with true
Protect unit safety stable operation and efficiency of combustion.
Detailed description of the invention
Fig. 1 is LM6000PD lightweight gas turbine DLE chamber structure figure；
Fig. 2 is the sectional view of the combustion chamber LM6000PD lightweight gas turbine DLE.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
Referring to Figure 1 and Figure 2, combustion chamber by it is outer, in, interior three concentric annular firing district's groups are at respectively corresponding A, B and C
Area；Respectively there are 30 cyclones in outer ring combustion zone and middle ring combustion zone, and inner ring combustion zone only has 15 cyclones since space limits,
High temperature and pressure exhaust from compressor after multiple axial swirlers and premix section by being fed separately into three ring combustion zones.?
In gap between liner and refluence plate, it is cooling that reversed convection current is carried out to combustion chamber using high pressure turbine cooling air；Utilize cloth
The damper in the combustion chamber upper left corner is set to absorb combustion chamber noise to reduce pressure oscillation；It is passed using two high-temperature piezoelectric pressure
Sensor carrys out the pressure oscillation in measure annular combustion chamber.
It is of the present invention based on flame temperature control gas turbine combustion method of adjustment the following steps are included:
1) by the average flame temperature T of combustion chamberflmaveControl is in TflmpctEqual to 50%；
Step 1) further include: judge NOx, CO concentration of combustion chamber smoke and whether T48 be more than limit value, when NOx concentration or
When T48 is more than limit value, then middle ring fuel quantity is reduced；When CO concentration is more than limit value, then increase middle ring fuel quantity, until combustion chamber
Until NOx, CO concentration and T48 of smoke evacuation are no more than limit value.
2) it keeps total fuel quantity of combustion chamber and outer ring fuel quantity constant, makes interior ring flame temperature by increasing inner ring fuel quantity
Degree is gradually increased with fixed amplitude, until PX36, NOx or CO concentration of combustion chamber smoke are more than that limit value or ABAL start, by this
When ring flame temperature as inner ring highest flame temperature TmaxC, wherein the temperature amplification of interior ring flame is Δ TMaxC；
3) it keeps total fuel quantity of combustion chamber and outer ring fuel quantity constant, makes interior ring flame temperature by reducing inner ring fuel quantity
Degree is gradually decreased with fixed amplitude, until PX36, NOx or CO concentration of combustion chamber smoke are more than that limit value or ABAL start, by this
When ring flame temperature as inner ring minimum flame temperatures TminC, wherein the temperature drop of interior ring flame is Δ TminC；
4) T is calculatedmaxCWith TminCDifference, and using the result of calculating as the control interval of inner ring flame temperature, when interior ring fire
When the control interval of flame temperature is greater than default smallest interval, then pass through temperature amplification Δ TMaxCWith temperature drop Δ TminCDifference pair
Current inner ring flame temperature is modified, and using revised default inner ring flame temperature as the interior inscription of loop of combustion chamber fire
Flame temperature TnomC, then judge whether PX36, NOx or CO concentration of combustion chamber smoke are more than permissible value, work as combustion chamber smoke again
PX36, NOx or CO concentration be more than permissible value when, then go to step 2)；When PX36, NOx or CO concentration of combustion chamber smoke do not have
When having more than permissible value, then step 5) is gone to；
5) the interior inscription of loop flame temperature T of the combustion chamber obtained according to step 4)nomCInner ring fuel quantity is reset, then
It keeps total fuel quantity constant, outer ring flame temperature is gradually increased with fixed amplitude by increasing outer ring fuel quantity, until burning
PX36, NOx or CO concentration of room smoke evacuation are more than that limit value or ABAL start, and record ring flame temperature T at this timemaxA, wherein outer ring
The temperature amplification Δ T of flamemaxA；
6) it keeps total fuel quantity of combustion chamber and inner ring fuel quantity constant, makes interior ring flame temperature by reducing outer ring fuel quantity
Degree is gradually decreased with fixed amplitude, until PX36, NOx or CO concentration of combustion chamber smoke are more than that limit value or ABAL start, by this
When ring flame temperature be outer ring minimum flame temperatures TminA, wherein the temperature drop of interior ring flame is Δ TminA, the sub- operating condition
For minA.
7) T is calculatedmaxAWith TminADifference work as outer ring fire and using the result of calculating as the control interval of outer ring flame temperature
When the control interval of flame temperature is greater than default smallest interval, then pass through Δ TmaxAWith Δ TminADifference amendment current preset outer ring
Flame temperature, and using revised outer ring flame temperature as outer inscription of loop flame temperature TnomA, then determine combustion chamber smoke
Whether PX36, NOx or CO concentration are more than permissible value, when PX36, NOx or CO concentration of combustion chamber smoke are more than permissible value, then
Go to step 5)；When PX36, NOx or CO concentration of combustion chamber smoke are not above permissible value, then step 8) is gone to；
8) pass through interior inscription of loop flame temperature TnomCAnd outer inscription of loop flame temperature TnomASet the outer ring flame temperature of combustion chamber
Degree and inner ring flame temperature complete the gas turbine combustion controlled based on flame temperature adjustment.
The present invention can be suitable for combustion chamber B combustion mode, BC/2 combustion mode, BC combustion mode, AB combustion mode and
ABC combustion mode；When under the ABC combustion mode of combustion chamber, flame temperature is adjusted by control amount of water sprayed.
Further include: average flame controlling curve, the control of outer ring flame temperature for obtaining all combustion mode lower combustion chamber are bent
Line and inner ring flame temperature controlling curve.
Claims (5)
1. a kind of gas turbine combustion method of adjustment based on flame temperature control, which comprises the following steps:
1) by the average flame temperature T of combustion chamberflmaveControl is in TflmpctEqual to 50%；
2) keep combustion chamber total fuel quantity and outer ring fuel quantity it is constant, by increase inner ring fuel quantity make inner ring flame temperature with
Fixed amplitude is gradually increased, will at this time until PX36, NOx or CO concentration of combustion chamber smoke are more than that limit value or ABAL start
Ring flame temperature is as inner ring highest flame temperature TmaxC, wherein the temperature amplification of interior ring flame is Δ TMaxC；
3) keep combustion chamber total fuel quantity and outer ring fuel quantity it is constant, by reduce inner ring fuel quantity make inner ring flame temperature with
Fixed amplitude gradually decreases, will at this time until PX36, NOx or CO concentration of combustion chamber smoke are more than that limit value or ABAL start
Ring flame temperature is as inner ring minimum flame temperatures TminC, wherein the temperature drop of interior ring flame is Δ TminC；
4) T is calculatedmaxCWith TminCDifference, and using the result of calculating as the control interval of inner ring flame temperature, when interior ring flame temperature
When the control interval of degree is greater than default smallest interval, then pass through temperature amplification Δ TMaxCWith temperature drop Δ TminCDifference to current
Inner ring flame temperature be modified, and using revised default inner ring flame temperature as the interior inscription of loop flame temperature of combustion chamber
Spend TnomC, then judge whether PX36, NOx or CO concentration of combustion chamber smoke are more than permissible value again, when combustion chamber smoke
When PX36, NOx or CO concentration are more than permissible value, then step 2) is gone to；When PX36, NOx or CO concentration of combustion chamber smoke do not have
When more than permissible value, then step 5) is gone to；
5) the interior inscription of loop flame temperature T of the combustion chamber obtained according to step 4)nomCInner ring fuel quantity is reset, is then kept
Total fuel quantity is constant, outer ring flame temperature is gradually increased with fixed amplitude by increasing outer ring fuel quantity, until combustion chamber is arranged
PX36, NOx or CO concentration of cigarette are more than that limit value or ABAL start, and record ring flame temperature T at this timemaxA, wherein outer ring flame
Temperature amplification Δ TmaxA；
6) keep combustion chamber total fuel quantity and inner ring fuel quantity it is constant, by reduce outer ring fuel quantity make inner ring flame temperature with
Fixed amplitude gradually decreases, will at this time until PX36, NOx or CO concentration of combustion chamber smoke are more than that limit value or ABAL start
Ring flame temperature is outer ring minimum flame temperatures TminA, wherein the temperature drop of interior ring flame is Δ TminA, which is
minA；
7) T is calculatedmaxAWith TminADifference, and using the result of calculating as the control interval of outer ring flame temperature, when outer ring flame temperature
When the control interval of degree is greater than default smallest interval, then pass through Δ TmaxAWith Δ TminADifference amendment current preset outer ring flame
Temperature, and using revised outer ring flame temperature as outer inscription of loop flame temperature TnomA, then determine combustion chamber smoke PX36,
Whether NOx or CO concentration is more than permissible value, when PX36, NOx or CO concentration of combustion chamber smoke are more than permissible value, then goes to step
It is rapid 5)；When PX36, NOx or CO concentration of combustion chamber smoke are not above permissible value, then step 8) is gone to；
8) pass through interior inscription of loop flame temperature TnomCAnd outer inscription of loop flame temperature TnomASet combustion chamber outer ring flame temperature and
Inner ring flame temperature completes the gas turbine combustion controlled based on flame temperature adjustment.
2. the gas turbine combustion method of adjustment according to claim 1 based on flame temperature control, which is characterized in that suitable
For combustion chamber B combustion mode, BC/2 combustion mode, BC combustion mode, AB combustion mode and ABC combustion mode.
3. the gas turbine combustion method of adjustment according to claim 1 based on flame temperature control, which is characterized in that when
When under the ABC combustion mode of combustion chamber, flame temperature is adjusted by control amount of water sprayed.
4. the gas turbine combustion method of adjustment according to claim 1 based on flame temperature control, which is characterized in that also
It include: average flame controlling curve, outer ring flame temperature control curve and the interior ring fire for obtaining all combustion mode lower combustion chamber
Flame temperature control curve.
5. the gas turbine combustion method of adjustment according to claim 1 based on flame temperature control, which is characterized in that step
It is rapid 1) further include: judge NOx, CO concentration of combustion chamber smoke and whether T48 be more than limit value, when NOx concentration or T48 are more than limit value
When, then reduce middle ring fuel quantity；When CO concentration is more than limit value, then increase middle ring fuel quantity, until the NOx of combustion chamber smoke,
Until CO concentration and T48 are no more than limit value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811420208.3A CN109579054A (en) | 2018-11-26 | 2018-11-26 | A kind of gas turbine combustion method of adjustment based on flame temperature control |
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| CN201811420208.3A CN109579054A (en) | 2018-11-26 | 2018-11-26 | A kind of gas turbine combustion method of adjustment based on flame temperature control |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040024516A1 (en) * | 2002-08-02 | 2004-02-05 | Richard Hook | Automatic mapping logic for a combustor in a gas turbine engine |
| CN101166935A (en) * | 2005-05-13 | 2008-04-23 | 西门子公司 | Process and device for regulating the course of a gas turbine combustion chamber |
| WO2018009192A1 (en) * | 2016-07-07 | 2018-01-11 | Siemens Aktiengesellschaft | Method for controlling fuel distribution in a gas turbine engine with multiple combustion zones |
| CN108119241A (en) * | 2016-11-30 | 2018-06-05 | 通用电气公司 | It is modeled for the discharge of gas-turbine unit |
-
2018
- 2018-11-26 CN CN201811420208.3A patent/CN109579054A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040024516A1 (en) * | 2002-08-02 | 2004-02-05 | Richard Hook | Automatic mapping logic for a combustor in a gas turbine engine |
| CN101166935A (en) * | 2005-05-13 | 2008-04-23 | 西门子公司 | Process and device for regulating the course of a gas turbine combustion chamber |
| WO2018009192A1 (en) * | 2016-07-07 | 2018-01-11 | Siemens Aktiengesellschaft | Method for controlling fuel distribution in a gas turbine engine with multiple combustion zones |
| CN108119241A (en) * | 2016-11-30 | 2018-06-05 | 通用电气公司 | It is modeled for the discharge of gas-turbine unit |
Non-Patent Citations (1)
| Title |
|---|
| 李孝堂: "《现代燃气轮机技术》", 30 November 2006, 航空工业出版社 * |
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Application publication date: 20190405 |