CN214384175U - Gas turbine flue gas recirculation system - Google Patents
Gas turbine flue gas recirculation system Download PDFInfo
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- CN214384175U CN214384175U CN202120587600.8U CN202120587600U CN214384175U CN 214384175 U CN214384175 U CN 214384175U CN 202120587600 U CN202120587600 U CN 202120587600U CN 214384175 U CN214384175 U CN 214384175U
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Abstract
The utility model relates to a gas turbine flue gas recirculation system belongs to gas turbine flue gas extrinsic cycle technical field. The problems that the performance of the gas turbine is greatly influenced by NOX and the denitration cost of the gas turbine is high are solved. The device comprises a gas compressor, a combustion chamber, a turbine, a flow divider, a condenser, a pump and a mixer, wherein the gas compressor, the combustion chamber, the turbine, the flow divider, the condenser, the pump and the mixer are sequentially connected to form a circulation loop. The condenser condenses a large amount of water vapor in the circulating flue gas, and simultaneously, as the liquid water is separated out, the sulfur reacts with the water, the condenser plays a part of sulfur collecting role, so that the emission of the combustion engine is reduced, the device maintenance is facilitated, and the environment is protected; the mixed gas is mixed with inlet air of an air inlet of the combustion engine in the mixer, so that the content of oxygen in the supplemented air is reduced, the generation of NOx is controlled, the denitration cost is low, and the denitration device has good economical efficiency and reliability.
Description
Technical Field
The utility model relates to a gas turbine flue gas circulation system belongs to gas turbine flue gas extrinsic cycle technical field.
Background
High-parameter gas turbines are the current international mainstream, and generally, there are two main ways to improve the performance of a gas turbine: firstly, the cycle parameters of the gas turbine are improved, and the performance of each part is improved; and secondly, an advanced power cycle system is applied. At the present stage, the outlet temperature of the combustion chamber of the advanced gas turbine exceeds 1600 ℃, and the generation rate of NOX becomes very violent, so that a large amount of NOX is generated during combustion, the NOX not only pollutes the environment, but also reduces the performance of the gas turbine, and the environmental protection and the cleanness of the gas turbine are extremely unfavorable. The denitration device adopted in China at present not only has large early investment, but also needs a large amount of capital maintenance in daily operation.
Therefore, it is desirable to provide a gas turbine flue gas recirculation system to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
The utility model discloses it is big that research and development has solved the performance that gas turbine receives NOX's influence, and gas turbine denitration expense is high problem. A brief summary of the present invention is provided below in order to provide a basic understanding of some aspects of the present invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention.
The technical scheme of the utility model:
the utility model provides a gas turbine flue gas recirculation system, includes compressor, combustion chamber, turbine, shunt, condenser, pump and blender, and compressor, combustion chamber, turbine, shunt, condenser, pump, blender all have entry and export, compressor, combustion chamber, turbine, shunt, condenser, pump, blender access & exit are connected in order and are formed circulation circuit.
Preferably: the flow divider further comprises a gas turbine exhaust port, and the gas compressor, the combustion chamber, the turbine, the flow divider and the gas turbine exhaust port are sequentially connected to form a gas exhaust path.
Preferably: the mixer also comprises a gas turbine air inlet, and inlet air of the gas turbine air inlet enters the mixer and then enters the compressor to form a supplementary air path.
Preferably: the condenser is a corrosion resistant condenser.
The utility model discloses following beneficial effect has:
the condenser condenses a large amount of water vapor in the circulating flue gas, and simultaneously, as the liquid water is separated out, the sulfur reacts with the water, the condenser plays a part of sulfur collecting role, so that the emission of the combustion engine is reduced, the device maintenance is facilitated, and the environment is protected;
the mixed gas is mixed with inlet air of an air inlet of the combustion engine in the mixer, so that the content of oxygen in the supplemented air is reduced, the generation of NOx is controlled, the denitration cost is low, and the denitration device has good economical efficiency and reliability.
Drawings
FIG. 1 is a schematic diagram of a gas turbine flue gas recirculation system.
In the figure, 1-compressor, 3-combustion chamber, 5-turbine, 7-splitter, 8-combustion engine exhaust, 10-condenser, 12-pump, 14-combustion engine air inlet and 15-mixer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described below with reference to specific embodiments shown in the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The utility model discloses the connection that mentions divide into fixed connection and can dismantle the connection, fixed connection is for the conventional fixed connection mode such as undetachable connection including but not limited to hem connection, rivet connection, adhesive connection and welded connection, can dismantle the connection including but not limited to conventional dismantlement modes such as threaded connection, buckle connection, pin joint and hinged joint, when not clearly prescribing a limit to concrete connection mode, acquiesces to always can find at least one kind of connected mode in current connected mode and can realize this function, and the technical staff in the art can select by oneself as required. For example: the fixed connection selects welding connection, and the detachable connection selects hinge connection.
The first embodiment is as follows: the embodiment is described with reference to fig. 1, and the gas turbine flue gas recirculation system of the embodiment includes a compressor 1, a combustion chamber 3, a turbine 5, a flow divider 7, a condenser 10, a pump 12 and a mixer 15, where the compressor 1, the combustion chamber 3, the turbine 5, the flow divider 7, the condenser 10, the pump 12 and the mixer 15 all have inlets and outlets, and the inlets and outlets of the compressor 1, the combustion chamber 3, the turbine 5, the flow divider 7, the condenser 10, the pump 12 and the mixer 15 are sequentially connected to form a circulation loop; the gas 2 compressed by the gas compressor 1 enters a combustion chamber 3 to be mixed and combusted with fuel, the combusted flue gas 4 enters a turbine 5 to expand and do work, the exhaust gas 6 after doing work enters a flow divider 7, the high-temperature gas 9 flowing through the flow divider 7 is introduced into a condenser 10 through a pipeline to be condensed, the condensed gas 11 enters a pump 12 and flows out of a mixed gas 13, and the mixed gas 13 enters the gas compressor again to form a circulating system; because of the fuel components, a large amount of water vapor and a part of sulfur exist in the high-temperature gas 9, if the high-temperature gas 9 is directly mixed with inlet air, liquid water can be condensed out of the mixed gas due to the lower inlet air temperature and the larger flow of the air inlet 14 of the gas turbine, and meanwhile, the physical properties of the mixture can be changed, so that the compression work of the gas compressor 1 is not facilitated, and the service life of the gas turbine is also not facilitated; the condenser 10 should be made of corrosion-resistant materials, a large amount of water vapor in the circulating flue gas is condensed, and meanwhile, as liquid water is separated out and sulfur reacts with water, the condenser 10 plays a role in collecting partial sulfur, so that the emission of the combustion engine is reduced.
The second embodiment is as follows: the embodiment is described with reference to fig. 1, the flow divider 7 further includes a gas turbine exhaust port 8, the compressor 1, the combustion chamber 3, the turbine 5, the flow divider 7, and the gas turbine exhaust port 8 are sequentially connected to form a gas exhaust path, the exhaust gas 6 after applying work is divided into two gas streams by the flow divider 7, and the other gas stream is exhausted out of the gas turbine through the gas turbine exhaust port 8, so that the high-temperature gas 9 entering the condenser 10 is reduced, and because only a small amount of exhaust gas (high-temperature gas 9) is extracted to enter the condenser 10, the performance requirement on the condenser 10 is reduced, thereby reducing the cost and having good economy and reliability.
The third concrete implementation mode: the embodiment is described with reference to fig. 1, the mixer 15 further includes a gas turbine air inlet 14, inlet air of the gas turbine air inlet 14 enters the mixer 15 and then enters the compressor 1 to form a supplementary gas circuit, the mixed gas 13 is combusted, the oxygen content of the mixed gas is low, and the mixed gas 13 and inlet air of the gas turbine air inlet 14 are mixed in the mixer 15, so that the oxygen content of the supplementary gas is reduced, and the generation of NOX is controlled;
the rate of formation of thermal NOX is:
d(NOX)/dt＝6×1016[O2]0.5[N2]T-0.5e-69090/T
wherein: [ O ]2]Represents the oxygen molar concentration; [ N ]2]Represents the molar concentration of nitrogen; t represents the reaction temperature;
the system reduces the oxygen concentration through a circulation loop under the condition of keeping the nitrogen concentration basically unchanged, achieves the purpose of reducing the generation rate of NOX, can match with variable working condition operation parameters of the gas compressor 1 by adjusting the condensation temperature of the condenser 10, increases the temperature of mixed air at the inlet of the gas compressor 1 within a reasonable range, increases the temperature of gas 2 at the outlet of the gas compressor 1, properly reduces the flame temperature of the combustion chamber 3, plays a role in protecting combustion, and from this point of view, T can also be properly reduced, and the fuel flow is reduced, thereby achieving the purpose of improving the efficiency of the gas turbine while reducing the emission of the gas turbine.
The fourth concrete implementation mode: referring to fig. 1, the present embodiment is described, and the condenser 10 of the gas turbine flue gas recirculation system of the present embodiment is a high temperature resistant and corrosion resistant condenser.
It should be noted that, in the above embodiments, as long as the technical solutions can be aligned and combined without contradiction, those skilled in the art can exhaust all possibilities according to the mathematical knowledge of the alignment and combination, and therefore the present invention does not describe the technical solutions after alignment and combination one by one, but it should be understood that the technical solutions after alignment and combination have been disclosed by the present invention.
This embodiment is only illustrative of the patent and does not limit the scope of protection thereof, and those skilled in the art can make modifications to its part without departing from the spirit of the patent.
Claims (4)
1. A gas turbine flue gas recirculation system, characterized by: the turbine mixing device comprises a gas compressor (1), a combustion chamber (3), a turbine (5), a flow divider (7), a condenser (10), a pump (12) and a mixer (15), wherein the gas compressor (1), the combustion chamber (3), the turbine (5), the flow divider (7), the condenser (10), the pump (12) and the mixer (15) are provided with inlets and outlets, and the gas compressor (1), the combustion chamber (3), the turbine (5), the flow divider (7), the condenser (10), the pump (12) and the mixer (15) are sequentially connected to form a circulation loop.
2. A gas turbine flue gas recirculation system according to claim 1, wherein: the flow divider (7) further comprises a gas turbine exhaust port (8), and the gas compressor (1), the combustion chamber (3), the turbine (5), the flow divider (7) and the gas turbine exhaust port (8) are sequentially connected to form a gas exhaust path.
3. A gas turbine flue gas recirculation system according to claim 1, wherein: the mixer (15) further comprises a gas turbine air inlet (14), and inlet air of the gas turbine air inlet (14) enters the mixer (15) and then enters the compressor (1) to form a supplementary air path.
4. A gas turbine flue gas recirculation system according to claim 1, wherein: the condenser (10) is a corrosion resistant condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120587600.8U CN214384175U (en) | 2021-03-23 | 2021-03-23 | Gas turbine flue gas recirculation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120587600.8U CN214384175U (en) | 2021-03-23 | 2021-03-23 | Gas turbine flue gas recirculation system |
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| Publication Number | Publication Date |
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| CN214384175U true CN214384175U (en) | 2021-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120587600.8U Active CN214384175U (en) | 2021-03-23 | 2021-03-23 | Gas turbine flue gas recirculation system |
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| CN (1) | CN214384175U (en) |
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2021
- 2021-03-23 CN CN202120587600.8U patent/CN214384175U/en active Active
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