CN209145666U - A kind of Combined-cycle Gas Turbine Unit start-up course NO2Emission control systems - Google Patents
A kind of Combined-cycle Gas Turbine Unit start-up course NO2Emission control systems Download PDFInfo
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- CN209145666U CN209145666U CN201821611688.7U CN201821611688U CN209145666U CN 209145666 U CN209145666 U CN 209145666U CN 201821611688 U CN201821611688 U CN 201821611688U CN 209145666 U CN209145666 U CN 209145666U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
Abstract
The utility model relates to a kind of Combined-cycle Gas Turbine Unit start-up course NO2Emission control systems, it belongs to gas turbine power generation field.The utility model control system includes gas turbine blower, gas-turbine combustion chamber, the turbine of gas turbine, waste heat boiler and turbine exhaust temperature measuring device, waste heat boiler inlet temperature measuring device, boiler exhaust CO measuring device and spraying device, gas turbine blower, gas-turbine combustion chamber, the turbine of gas turbine is sequentially connected with waste heat boiler, turbine exhaust temperature measuring device is located at the turbine exhaust outlet of gas turbine, waste heat boiler inlet temperature measuring device is located at exhaust-heat boiler inlet, boiler exhaust CO measuring device is located at waste heat boiler smoke evacuation, spraying device is located in the turbine exhaust exhaust pass of gas turbine.Tthe utility model system advantages of simple, operating cost is low, reduces the NO in gas turbine start-up course2Discharge, to alleviate or eliminate starting tobacco.
Description
Technical field
The utility model relates to a kind of systems, more particularly, to a kind of Combined-cycle Gas Turbine Unit start-up course NO2
Emission control systems, it belongs to gas turbine power generation field.
Background technique
Have the characteristics that efficient, low emission, and unit starting by the Combined-cycle Gas Turbine Unit of fuel of natural gas
Fastly.The a large amount of Combined-cycle Gas Turbine Unit in China is used for peak load regulation network.A large amount of Combined-cycle Gas Turbine Units are starting
In the process, the phenomenon that emitting tobacco there are chimney.
Studies have shown that the generation of tobacco is due to NO in the smoke evacuation of unit in low- load conditions2Too high levels cause, and work as row
NO in cigarette2When reaching about 10ppm or more, that is, it will appear macroscopic faint yellow smoke evacuation.In order to slow down or eliminate combustion gas
The tobacco phenomenon of turbine combined cycle unit start-up course, gas turbine producer constantly update its burner.
By taking GE company as an example, in order to solve the problems, such as the tobacco in its F grades of Combined-cycle Gas Turbine Unit start-up course, open
Send out the full premix DLN2.6+ burner completely with out diffusion combustion, and by adjusting technologies such as the strategies of unit starting process,
The tobacco phenomenon of start-up course is greatly reduced, but still NO cannot be completely eliminated2Discharge bring tobacco problem.Other removals are opened
NO during dynamic2Method be included in NO in waste heat boiler by way of the catalysis reduction such as SCR2N is reduced into NO2.But
One side which will increase investment and operating cost, on the other hand, for retrofitted unit, need pre- in waste heat boiler flue
There are the spaces of SCR arrangement, so that the application of which is limited.
Utility model content
The purpose of the utility model is to overcome the above deficiencies in the existing technologies, and provide a kind of system design letter
Single rationally operating cost is low, reduces the NO in gas turbine start-up course2Discharge, to alleviate or eliminate starting tobacco
Combined-cycle Gas Turbine Unit start-up course NO2Emission control systems.
The technical scheme in the invention for solving the above technical problem is: the Combined-cycle Gas Turbine Unit started
Journey NO2 emission control systems include generator, low pressure (LP) cylinder, intermediate pressure cylinder, high pressure cylinder, gas turbine blower, gas turbine combustion
Room, the turbine of gas turbine, waste heat boiler and high pressure water pump, the generator, low pressure (LP) cylinder, intermediate pressure cylinder, high pressure cylinder, combustion gas wheel
Machine compressor, gas-turbine combustion chamber, the turbine of gas turbine and waste heat boiler are sequentially connected, waste heat boiler and gas turbine
Match, high pressure water pump is connected to waste heat boiler, it is characterised in that: further include turbine exhaust temperature measuring device, waste heat boiler into
Mouth temperature measuring device, boiler exhaust CO measuring device and spraying device, the turbine exhaust temperature measuring device setting are being fired
The turbine exhaust of gas-turbine exports, and the setting of waste heat boiler inlet temperature measuring device is surveyed in exhaust-heat boiler inlet, boiler exhaust CO
It measures device to be arranged at waste heat boiler smoke evacuation, spraying device is arranged in the turbine exhaust exhaust pass of gas turbine, spraying to fill
The water supply set passes through high pressure water pump；System is simple, and operating cost is low, reduces the NO in gas turbine start-up course2Discharge,
To alleviate or eliminate starting tobacco.
Preferably, Combined-cycle Gas Turbine Unit start-up course NO described in the utility model2Emission control systems,
It is characterized by also including spraying feed water flow regulating valve, the spraying feed water flow regulating valve setting high pressure water pump with
On the connecting pipeline of spraying device；Spraying feed water flow regulating valve, the spraying water of adjustable spraying device quickly reduce flue gas temperature
Degree.
Preferably, Combined-cycle Gas Turbine Unit start-up course NO described in the utility model2Emission control systems,
It is characterized by also including oxygen-eliminating device, oxygen-eliminating device is arranged in the output end of the waste heat boiler.
Preferably, Combined-cycle Gas Turbine Unit start-up course NO described in the utility model2Emission control systems,
It is characterized by: the boiler exhaust CO measuring device is arranged at the smoke evacuation of waste heat boiler tail portion.
The utility model compared with prior art, has the following advantages that and effect: alleviation even is eliminated combustion turbine combined
The tobacco problem of loop start process；System is simple, and operating cost is low.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model embodiment.
In figure: gas turbine blower 1, gas-turbine combustion chamber 2, the turbine 3 of gas turbine, waste heat boiler 4, high pressure is given
Water pump 5, spraying device 6, spraying feed water flow regulating valve 7, turbine exhaust temperature measuring device 8, waste heat boiler inlet temperature are surveyed
Amount device 9, boiler exhaust CO measuring device 10, generator 11, low pressure (LP) cylinder 12, intermediate pressure cylinder 13, high pressure cylinder 14, condenser 15 coagulate
Bear water pump 16, oxygen-eliminating device 17, low pressure feed water pump 18, middle pressure feed pump 19, high pressure superheated steam A, in press through hot steam B, low pressure
Superheated steam C, discharge fume D, air E, fuel gas F, moisturizing G.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is pair
The explanation of the utility model and the utility model is not limited to following embodiment.
Embodiment.
Referring to Fig. 1, Combined-cycle Gas Turbine Unit start-up course NO2Emission control systems include generator 11, low pressure
Cylinder 12, intermediate pressure cylinder 13, high pressure cylinder 14, gas turbine blower 1, gas-turbine combustion chamber 2, the turbine 3 of gas turbine, waste heat pot
Furnace 4, high pressure water pump 5, turbine exhaust temperature measuring device 8, waste heat boiler inlet temperature measuring device 9, boiler exhaust CO are surveyed
Device 10 and spraying device 6 are measured,
The generator 11, low pressure (LP) cylinder 12, intermediate pressure cylinder 13, high pressure cylinder 14, gas turbine blower 1, combustion gas wheel of the present embodiment
Machine combustion chamber 2, gas turbine turbine 3 and waste heat boiler 4 be sequentially connected, waste heat boiler 4 respectively with low pressure (LP) cylinder 12, intermediate pressure cylinder 13
It is connected with high pressure cylinder 14, waste heat boiler 4 is matched with gas turbine, and high pressure water pump 5 is connected to waste heat boiler 4, the turbine row
3 air exit of turbine of gas turbine is arranged in gas temperature measuring device 8, and the setting of waste heat boiler inlet temperature measuring device 9 exists
4 entrance of waste heat boiler, boiler exhaust CO measuring device 10 are arranged at 4 smoke evacuation of waste heat boiler, and spraying device 6 is arranged in combustion gas wheel
In the 3 air exit flue of turbine of machine, the water supply of spraying device 6 is connected to high pressure water pump 5.
The connecting pipeline of high pressure water pump 5 Yu spraying device 6 is arranged in the spraying feed water flow regulating valve 7 of the present embodiment
On.
The boiler exhaust CO measuring device 10 of the present embodiment is arranged at 4 tail portion smoke evacuation of waste heat boiler.
The outlet of the present embodiment mesolow cylinder 12 is sequentially connected in series after condenser 15 and condensate pump 16 and 4 phase of waste heat boiler
Even, the output end of waste heat boiler 4 is connected with oxygen-eliminating device 17, the outlet end of the oxygen-eliminating device 17 pumps 18 by low pressure feed water respectively, in
Pressure feed pump 19, high pressure water pump 5 are connected with the input terminal of waste heat boiler 4, and waste heat boiler 4 exports high pressure superheated steam A and enters
High pressure cylinder 14 presses through hot steam B in the output of waste heat boiler 4 and enters intermediate pressure cylinder 13, waste heat boiler 4 export low-pressure superheated steam C into
Enter low pressure (LP) cylinder 12, the rear end of waste heat boiler 4 enters gas turbine blower 1 for the D that discharges fume, air E, and fuel gas F enters combustion gas
Turbine combustion room 2, moisturizing G fill into waste heat boiler 4 and condensate pump 16 according to demand.
The present embodiment purpose be achieved in that by the study found that Combined-cycle Gas Turbine Unit in start-up course
In, especially under the low load condition of start-up course, since 2 temperature of gas-turbine combustion chamber is low, incomplete combustion, combustion engine
Contain a large amount of CO in exhaust, the discharge of general CO can reach hundreds of ppm.And under the low load condition of start-up course, combustion
NOx content in machine exhaust can also reach tens of ppm, after the exhaust of turbine 3 of gas turbine enters waste heat boiler 4,
At suitable temperature, the NO in combustion engine exhaust can quickly be oxidized to NO2, this is Gas Turbine Combined-cycle chimney NO2Discharge
High one of the major reasons, work as NO2Discharge when reaching about 10ppm or more, just can be appreciated that chimney exhaust in faint yellow.Applicant
By the study found that temperature is to influence NO to NO under the oxygen concentration and water vapour content of gas turbine turbine exhaust2Conversion
Most important factor, when turbine exhaust temperature is greater than about 500 DEG C, stop of the combustion turbine exhaustion in waste heat boiler 4 will be led
Cause in exhaust NO to NO2Conversion.The present embodiment, which is used, exports spray structure in turbine, quickly to turbine exhaust exit gas
It is cooled down, to prevent the NO in exhaust in waste heat boiler 4 to NO2Conversion.
The present embodiment is in 3 exhaust ports of turbine of gas turbine and the expansion segment outlet setting turbine exhaust of waste heat boiler 4
Temperature measuring device 8, waste heat boiler inlet temperature measuring device 9.Setting is spraying in the flue that the turbine 3 of gas turbine exports
Device 6.In gas turbine start-up course or under low load condition, when detecting that turbine outlet temperature is greater than about 500 DEG C, connection
When closing the CO discharge greater than about 30ppm of circulation smoke evacuation, draws a small amount of water supply from the water supply pump discharge of combined cycle bottoming cycle, lead to
Cross the spraying device 6 being arranged in gas turbine turbine exhaust pass, spray water into turbine exiting flue gas, high pressure water by nozzle with
After be atomized, into the flue of turbine exhaust, fast cooling is carried out to the exhaust of turbine 3 of gas turbine, turbine exhaust temperature is dropped
As low as 500 DEG C or less；By quickly reducing turbine exhaust temperature, avoid the NO in gas turbine turbine exhaust in waste heat boiler 4
In be converted into NO2, to slow down the NO in combined cycle unit start-up course2Tobacco problem caused by discharge.
The course of work that the present embodiment reduces the NO2 discharge of Gas Turbine Combined-cycle start-up course is: with combustion gas wheel
The starting of machine combined cycle, 3 delivery temperature of turbine of gas turbine is monitored by turbine exhaust temperature measuring device 8, is passed through simultaneously
Boiler exhaust CO measuring device 10 monitors the CO discharge of the turbine 3 of gas turbine, when the turbine 3 for monitoring gas turbine is vented temperature
Degree opens spraying feed water flow regulating valve 7, adjusts and spray more than 500 DEG C, and when the exhaust CO concentration of waste heat boiler 4 is greater than 30ppm
The spraying water of mist device 6, quickly reduces flue-gas temperature；Monitor waste heat measured by waste heat boiler inlet temperature measuring device 9
Boiler inlet temperature adjusts water flow by spraying feed water flow regulating valve 7, so that waste heat boiler inlet temperature measuring device 9
The flue-gas temperature measured is lower than 500 DEG C.
Water needed for spraying device 6 in the present embodiment both may come from the feed pump of boiler, can also have other to come
Source.4 tail of waste heat boiler can be both arranged in as in the present embodiment to the measurement of CO concentration in the smoke evacuation of turbine 3 of gas turbine
Portion, also can be set turbine exhaust to chimney any position for facilitating implementation or directly set from the pollutant monitoring of power plant
It is read in standby on-line checking result.
By reducing the temperature of turbine smoke evacuation by spraying to 500 DEG C hereinafter, 500 DEG C are a representative values in the present embodiment, have
The temperature of body can determine that the core of the present embodiment is to inhibit to fire by spraying fast cooling according to debugging the case where each unit
NO in gas-turbine turbine exhaust is in waste heat boiler 4 to NO2Conversion, reduce the NO of unit2Discharge even disappears to alleviate
Except chimney tobacco.
By above-mentioned elaboration, those skilled in the art can implement.
In addition, it should be noted that, the specific embodiments described in this specification, the shape of parts and components are named
Title etc. can be different, and above content is only to the utility model structure example explanation described in this specification.
All equivalence changes or simple change done according to structure, feature and principle described in the concept of the patent of the utility model, are wrapped
It includes in the protection scope of the utility model patent.Those skilled in the art of the present invention can be to described
Specific embodiment does various modifications or additions or is substituted in a similar manner, without departing from the knot of the utility model
Structure or beyond the scope defined by this claim, all should belong to the protection range of the utility model.
Claims (4)
1. a kind of Combined-cycle Gas Turbine Unit start-up course NO2Emission control systems, including generator, low pressure (LP) cylinder, middle pressure
Cylinder, high pressure cylinder, gas turbine blower, gas-turbine combustion chamber, the turbine of gas turbine, waste heat boiler and high pressure water pump,
The generator, low pressure (LP) cylinder, intermediate pressure cylinder, high pressure cylinder, gas turbine blower, gas-turbine combustion chamber, gas turbine turbine
It is sequentially connected with waste heat boiler, waste heat boiler is matched with gas turbine, and high pressure water pump is connected to waste heat boiler, and feature exists
In: it further include turbine exhaust temperature measuring device, waste heat boiler inlet temperature measuring device, boiler exhaust CO measuring device and spray
The turbine exhaust outlet of gas turbine, waste heat boiler inlet temperature is arranged in mist device, the turbine exhaust temperature measuring device
Measuring device setting is arranged at waste heat boiler smoke evacuation in exhaust-heat boiler inlet, boiler exhaust CO measuring device, and spraying device is set
It sets in the turbine exhaust exhaust pass of gas turbine, the water supply of spraying device passes through high pressure water pump.
2. Combined-cycle Gas Turbine Unit start-up course NO according to claim 12Emission control systems, feature exist
In: it further include spraying feed water flow regulating valve, the spraying feed water flow regulating valve is arranged in high pressure water pump and spraying device
Connecting pipeline on.
3. Combined-cycle Gas Turbine Unit start-up course NO according to claim 12Emission control systems, feature exist
In: it further include oxygen-eliminating device, oxygen-eliminating device is arranged in the output end of the waste heat boiler.
4. Combined-cycle Gas Turbine Unit start-up course NO according to claim 12Emission control systems, feature exist
In: the boiler exhaust CO measuring device is arranged at the smoke evacuation of waste heat boiler tail portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821611688.7U CN209145666U (en) | 2018-09-30 | 2018-09-30 | A kind of Combined-cycle Gas Turbine Unit start-up course NO2Emission control systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821611688.7U CN209145666U (en) | 2018-09-30 | 2018-09-30 | A kind of Combined-cycle Gas Turbine Unit start-up course NO2Emission control systems |
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| CN209145666U true CN209145666U (en) | 2019-07-23 |
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| CN201821611688.7U Active CN209145666U (en) | 2018-09-30 | 2018-09-30 | A kind of Combined-cycle Gas Turbine Unit start-up course NO2Emission control systems |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339881A (en) * | 2018-09-30 | 2019-02-15 | 杭州华电半山发电有限公司 | A kind of Combined-cycle Gas Turbine Unit start-up course NO2Emission control systems and method |
| CN112943452A (en) * | 2021-02-23 | 2021-06-11 | 国电环境保护研究院有限公司 | Total process NO for controlling gas turbine unit to operate on gas turbine sideXSystem for discharging |
-
2018
- 2018-09-30 CN CN201821611688.7U patent/CN209145666U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339881A (en) * | 2018-09-30 | 2019-02-15 | 杭州华电半山发电有限公司 | A kind of Combined-cycle Gas Turbine Unit start-up course NO2Emission control systems and method |
| CN109339881B (en) * | 2018-09-30 | 2024-03-26 | 杭州华电半山发电有限公司 | Starting process NO of gas turbine combined cycle unit 2 Emission control system and method |
| CN112943452A (en) * | 2021-02-23 | 2021-06-11 | 国电环境保护研究院有限公司 | Total process NO for controlling gas turbine unit to operate on gas turbine sideXSystem for discharging |
| CN112943452B (en) * | 2021-02-23 | 2022-03-15 | 国电环境保护研究院有限公司 | Total process NO for controlling gas turbine unit to operate on gas turbine sideXSystem for discharging |
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