CN205135814U - System for distributed energy resource station LNG that gasifies - Google Patents
System for distributed energy resource station LNG that gasifies Download PDFInfo
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- CN205135814U CN205135814U CN201520972581.5U CN201520972581U CN205135814U CN 205135814 U CN205135814 U CN 205135814U CN 201520972581 U CN201520972581 U CN 201520972581U CN 205135814 U CN205135814 U CN 205135814U
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Abstract
The utility model relates to a system for distributed energy resource station LNG that gasifies, including the vaporizer, gas turbine, exhaust -heat boiler, steam turbine and condenser, the gas transmission mouth and gas turbine's the air inlet of vaporizer are connected, gas turbine's exhaust port and exhaust -heat boiler are connected, exhaust -heat boiler's steam drain is connected with steam turbine's steam inlet, steam turbine's steam drain is connected with the steam inlet of condenser, the condensate water export of condenser and exhaust -heat boiler's condensate water entry linkage, the water inlet and the confession water piping connection of condenser, the delivery port and time water piping connection of condenser, the wet return falls into two the tunnel, wherein be connected with the water inlet of vaporizer all the way, another way is connected with the cistern, cistern and atmosphere UNICOM, the delivery port and the confession water piping connection of vaporizer. This system not only has energy utilization and rates high, the good advantage of the economic nature of power plant, and the problem that can avoid combustible gas to be brought into steam circulation thermodynamic system, reduces the personal safety risk.
Description
Technical field
The utility model relates to LNG gasification technology, particularly the system of a kind of distributed busbar protection gasification LNG.
Background technique
Distributed energy is the energy comprehensive utilization system being distributed in user side, pursues energy cascade utilization to reach higher efficiency of energy utilization.Prime mover is that the distributed energy resource system of small size gas turbine is generally using rock gas as fuel, in the distributed busbar protection of some pipeline source of the gas instability, often set up LNG (LNG Liquefied natural gas) vaporizing station in addition, pipeline gas ensure when cannot meet the supply that unit normally runs, utilize tank car conveying liquified natural gas, in vaporizing station, LNG Liquefied natural gas is gasified, after pressure regulation, by pipeline by natural gas transport to prime mover.LNG gasification heat absorption is general adopts air-heating type gasifier and water bath type gasifier, and air-heating type gasifier utilizes air as thermal source, provides the LNG heat that gasification needs, and its build is comparatively large, and vaporization ability is less, is not generally suitable for the distributed busbar protection that air consumption is larger.The thermal source of water bath type gasifier comes from the hot water that water-heating furnace provides, LNG gasification needs water-heating furnace additionally to consume a part of rock gas, gas consumption amount increases, due in Small Combustion stove combustion, Combustion System is uneven, and provide the heat needed for LNG gasification by intermediate medium hot water, efficiency of energy utilization is lower, and the flue gas to airborne release higher temperature, be unfavorable for that decreasing pollution thing discharges, and rock gas divides multiple branch circuit operation and control, be unfavorable for that combustible gas leakage is monitored, there is the security risk such as higher gas leakage and detonation.
Or it is general, rock gas is by gas turbine acting generating, and smoke discharging residual heat heating steam enters steam turbine acting generating, and the steam of higher calorific value is extracted a part in the middle of steam turbine, towards LNG gasification system, by vaporizer, utilize high-grade steam latent heat of vaporization gasification LNG, vapor (steam) temperature is higher, belong to pressure piping, vaporizer also belongs to pressurized container, and the safety requirement grade of these e-quipment and pipes is higher, improves equipment for gasification cost; Steam cooling condenses into water in addition, in order to reclaim the working medium of better quality, water of condensation by the row of boosting again in the thermodynamic system of vapor recycle, because vaporizer has the risk of broken pipe, rock gas is likely scurried in steam and condensate system, in the rock gas pipeline that is brought into thermodynamic system immediately leaked and equipment, have and leak again and the potential safety hazard of detonation.
Summary of the invention
Based on this, be necessary the defect for prior art, the system that a kind of distributed busbar protection gasifies LNG is provided, not only there is the advantage that energy utilization rate is high, economy of power plant is good, and inflammable gas can be avoided to be brought into problem that steam turbine is main vapor recycle thermodynamic system, reduce personal safety risk.
Its technological scheme is as follows:
The system of a kind of distributed busbar protection gasification LNG, comprise vaporizer, gas turbine, exhaust heat boiler, steam turbine and vapour condenser, the blowing mouth of described vaporizer is connected with the suction port of gas turbine, the smoke exhaust port of described gas turbine is connected with exhaust heat boiler, the steam-expelling port of described exhaust heat boiler is connected with the steam inlet of steam turbine, the steam-expelling port of described steam turbine is connected with the steam inlet of vapour condenser, the water of condensation outlet of described vapour condenser is connected with the water of condensation entrance of exhaust heat boiler, the water intake of described vapour condenser is connected with water pipe, the water outlet of described vapour condenser is connected with return pipe, described return pipe is divided into two-way, wherein a road is connected with the water intake of vaporizer, another road is connected with wet pit, described wet pit and atmosphere, the water outlet of described vaporizer is connected with water pipe.
Its further technological scheme is as follows:
The system of described distributed busbar protection gasification LNG also comprises cooling tower, and the water outlet of described wet pit is connected with the water intake of cooling tower, and the water outlet of described cooling tower is connected with water pipe.
Described vapour condenser and exhaust heat boiler connecting pipeline are provided with feed water pump.
The connecting pipeline of described vaporizer and water pipe is provided with the first circulating water pump, the connecting pipeline of described cooling tower and water pipe is provided with the second circulating water pump.
The output shaft of described gas turbine is connected with the first generator, and the output shaft of described steam turbine is connected with the second generator.
The system of described distributed busbar protection gasification LNG also comprises LNG storage tank, and described LNG storage tank is connected with vaporizer, and the connecting pipeline of LNG storage tank and vaporizer is provided with LNG transfer pump.
Below the advantage of preceding solution or principle are described:
The system of above-mentioned distributed busbar protection gasification LNG, utilize circulating water used heat, as LNG gasification thermal source, the heat that LNG gasifies needs is provided, not needing additionally to consume rock gas, without the need to arranging water-heating furnace, decreasing the external heat disposal of pollutants of circulating water backwater simultaneously yet, avoid the high-temperature flue gas disposal of pollutants adopting water-heating furnace gasification LNG to cause, improve social benefit.Energy source station system simplification, investment reduces, and air consumption is few, and energy utilization rate is high, good economy performance, and after the heat exchange of circulating water backwater, entering the open to atmosphere wet pit of connection, discharge end is open, even if there is natural gas leaking to enter circulation in heat transfer process, emptying atmospheric dilution in wet pit the most at last, reduce the potential safety hazard that inflammable gas assembles detonation, more avoiding being brought into steam turbine is main vapor recycle thermodynamic system, reduces personal safety risk.Part or all of circulating water backwater is cooled by vaporizer, significantly can reduce the power of fan that circulating water backwater cools in cooling tower, reduces station service power consumption rate, improves distributed busbar protection Economy.LNG obtains stable gasification thermal source, has ensured the safe operation of energy source station.Meet country-driven degree of depth energy-saving and emission-reduction policy, energy source station investment and operator can be made more easily to realize target for energy-saving and emission-reduction.
Accompanying drawing explanation
Fig. 1 is the system flow schematic diagram one of distributed busbar protection gasification LNG described in the utility model embodiment;
Fig. 2 is the system flow schematic diagram two of distributed busbar protection gasification LNG described in the utility model embodiment.
Description of reference numerals:
1, LNG tank car, 2, LNG storage tank, 3, LNG transfer pump, 4, vaporizer, 5, gas turbine, 6, first generator, 7, exhaust heat boiler, 8, steam turbine, 9, second generator, 10, vapour condenser, 11, feed water pump, 12, second circulating water pump, 13, first circulating water pump, 14, cooling tower, 15, wet pit, 101, liquid LNG, 102, rock gas, 103, high-temperature flue gas, 201, high-temperature steam, 202, exhaust steam, 203, water of condensation, 301, water pipe, 302, return pipe, 401, circulating water supplies water the second tunnel, 402, circulating water backwater second tunnel, 501, the circulating water water supply first via, 502, the circulating water backwater first via.
Embodiment
As shown in Fig. 1 to 2, the system of a kind of distributed busbar protection gasification LNG, comprise vaporizer 4, gas turbine 5, exhaust heat boiler 7, steam turbine 8 and vapour condenser 10, LNG tank car 1 inputs LNG in LNG storage tank 2, described LNG storage tank 2 is connected with vaporizer 4, and LNG storage tank 2 is provided with LNG transfer pump 3 with the connecting pipeline of vaporizer 4, the blowing mouth of described vaporizer 4 is connected with the suction port of gas turbine 5, the smoke exhaust port of described gas turbine 5 is connected with exhaust heat boiler 7, the steam-expelling port of described exhaust heat boiler 7 is connected with the steam inlet of steam turbine 8, the steam-expelling port of described steam turbine 8 is connected with the steam inlet of vapour condenser 10, the water of condensation outlet of described vapour condenser 10 is connected with the water of condensation entrance of exhaust heat boiler 7, the water intake of described vapour condenser 10 is connected with water pipe 301, the water outlet of described vapour condenser 10 is connected with return pipe 302, described return pipe 302 is divided into two-way, wherein the circulating water backwater first via 502 is connected with the water intake of vaporizer 4, circulating water backwater second tunnel 402 is connected with wet pit 15, described wet pit 15 and atmosphere, the water outlet of described vaporizer 4 is connected with water pipe 301.
The system of described distributed busbar protection gasification LNG, utilize circulating water used heat, as LNG gasification thermal source, the heat that LNG gasifies needs is provided, not needing additionally to consume rock gas, without the need to arranging water-heating furnace, decreasing the external heat disposal of pollutants of circulating water backwater simultaneously yet, avoid the high-temperature flue gas disposal of pollutants adopting water-heating furnace gasification LNG to cause, improve social benefit.Energy source station system simplification, investment reduces, and air consumption is few, and energy utilization rate is high, good economy performance, and after the heat exchange of circulating water backwater, entering the open to atmosphere wet pit 15 of connection, discharge end is open, even if there is natural gas leaking to enter circulation in heat transfer process, emptying atmospheric dilution in wet pit 15 the most at last, reduce the potential safety hazard that inflammable gas assembles detonation, more avoiding being brought into steam turbine 8 is main vapor recycle thermodynamic system, reduces personal safety risk.Part or all of circulating water backwater is cooled by vaporizer, significantly can reduce the power of fan that circulating water backwater cools in cooling tower 14, reduces station service power consumption rate, improves distributed busbar protection Economy.LNG obtains stable gasification thermal source, has ensured the safe operation of energy source station.Meet country-driven degree of depth energy-saving and emission-reduction policy, energy source station investment and operator can be made more easily to realize target for energy-saving and emission-reduction.Vaporizer can provide fuel for energy source station, also can provide rock gas for resident or industry.
As shown in Figure 1, the system of described distributed busbar protection gasification LNG also comprises cooling tower 14, the water outlet of described wet pit 15 is connected with the water intake of cooling tower 14, the water outlet of described cooling tower 14 is connected with water pipe 301, cooling tower 14 pairs of circulating water backwater second tunnels 402 cool, and cooled circulating water backwater cools as the 10 pairs of exhaust steam 202 of cooling circulating water water supply input vapour condenser.As shown in Figure 2, also circulating water backwater second tunnel 402 directly can be entered the sea of External Environment, river, river, lake and municipal middle water processing station etc. and reach open cycle, provide cooling circulating water to supply water by the sea of External Environment, river, river, lake and municipal middle water processing station etc. for vapour condenser 10.Even if having natural gas leaking to enter circulation in gasification heat transfer process, the most emptying atmospheric dilution, reduce the potential safety hazard that inflammable gas assembles detonation, more avoiding being brought into steam turbine 8 is main vapor recycle thermodynamic system, reduces personal safety risk.
The output shaft of described gas turbine 5 is connected with the first generator 6, rock gas 102 enters gas turbine 5, gas turbine 5 runs drive first generator 6 and generates electricity, the output shaft of described steam turbine 8 is connected with the second generator 9, the high-temperature flue gas 103 of gas turbine 5 enters exhaust heat boiler 7, heated feed water produces high-temperature steam 201, enter steam turbine 8, the second generator 9 is driven to generate electricity, described vapour condenser 10 and exhaust heat boiler 7 connecting pipeline are provided with feed water pump 11, exhaust steam 202 after acting becomes water of condensation 203 through vapour condenser 10 cooling, boost through feed water pump 11, again enter exhaust heat boiler 7.The connecting pipeline of described vaporizer and water pipe 301 is provided with the first circulating water pump 13, described cooling tower 14 is provided with the second circulating water pump 12 with the connecting pipeline of water pipe 301.Supply water the second tunnel 401 and the circulating water water supply first via 501 of circulating water is converged respectively after the second circulating water pump 12 and the boosting of the first circulating water pump 13, forms cooling circulating water and supplies water and enter vapour condenser 10.
A method of distributed busbar protection gasification LNG, comprises the steps:
Liquid LNG101 in LNG storage tank 2 is extracted out and is delivered to vaporizer 4 by LNG transfer pump 3;
The high-temperature flue gas 103 produced by gas turbine 5 inputs exhaust heat boiler 7, and heated feed water produces high-temperature steam 201 and enters steam turbine 8, and the exhaust steam 202 after steam turbine 8 does work enters vapour condenser 10;
The input vapour condenser 10 that supplied water by cooling circulating water cools exhaust steam 202, exhaust steam 202 becomes water of condensation 203 through vapour condenser 10 cooling, boost through feed water pump 11 and again enter exhaust heat boiler 7, cooling circulating water absorbs exhaust steam 202 thermal temperature rising formation circulating water backwater simultaneously;
Circulating water backwater is divided into two-way, wherein a road enters the wet pit 15 with atmosphere, enter cooling tower 14 again to cool, another road enters vaporizer 4 provides heat for liquid LNG gasification, rock gas 102 after gasification inputs gas turbine 5, forms cooling circulating water water supply input vapour condenser 10 after the cooling of two-way circulating water backwater.
The method of described distributed busbar protection gasification LNG, utilize circulating water used heat, as LNG gasification thermal source, the heat that LNG gasifies needs is provided, do not need additionally to consume rock gas simultaneously, also without the need to arranging water-heating furnace, energy source station system simplification, investment reduces, air consumption is few, energy utilization rate is high, and after the heat exchange of circulating water backwater, enter the open to atmosphere wet pit 15 of connection, discharge end is open, even if having natural gas leaking to enter circulation in gasification heat transfer process, emptying atmospheric dilution in wet pit 15 the most at last, reduce the potential safety hazard that inflammable gas assembles detonation, more avoiding being brought into steam turbine 8 is main vapor recycle thermodynamic system, reduce personal safety risk.
Each technical characteristics of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristics in above-described embodiment is not all described, but, as long as the combination of these technical characteristicss does not exist contradiction, be all considered to be the scope that this specification is recorded.
The above embodiment only have expressed several mode of execution of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (6)
1. the system of a distributed busbar protection gasification LNG, it is characterized in that, comprise vaporizer, gas turbine, exhaust heat boiler, steam turbine and vapour condenser, the blowing mouth of described vaporizer is connected with the suction port of gas turbine, the smoke exhaust port of described gas turbine is connected with exhaust heat boiler, the steam-expelling port of described exhaust heat boiler is connected with the steam inlet of steam turbine, the steam-expelling port of described steam turbine is connected with the steam inlet of vapour condenser, the water of condensation outlet of described vapour condenser is connected with the water of condensation entrance of exhaust heat boiler, the water intake of described vapour condenser is connected with water pipe, the water outlet of described vapour condenser is connected with return pipe, described return pipe is divided into two-way, wherein a road is connected with the water intake of vaporizer, another road is connected with wet pit, described wet pit and atmosphere, the water outlet of described vaporizer is connected with water pipe.
2. the system of distributed busbar protection gasification LNG as claimed in claim 1, it is characterized in that, also comprise cooling tower, the water outlet of described wet pit is connected with the water intake of cooling tower, and the water outlet of described cooling tower is connected with water pipe.
3. the system of distributed busbar protection gasification LNG as claimed in claim 2, is characterized in that, described vapour condenser and exhaust heat boiler connecting pipeline are provided with feed water pump.
4. the system of distributed busbar protection gasification LNG as claimed in claim 2, it is characterized in that, the connecting pipeline of described vaporizer and water pipe is provided with the first circulating water pump, the connecting pipeline of described cooling tower and water pipe is provided with the second circulating water pump.
5. the system of distributed busbar protection gasification LNG as claimed in claim 2, it is characterized in that, the output shaft of described gas turbine is connected with the first generator, and the output shaft of described steam turbine is connected with the second generator.
6. the system of distributed busbar protection gasification LNG as claimed in claim 1, it is characterized in that, also comprise LNG storage tank, described LNG storage tank is connected with vaporizer, and the connecting pipeline of LNG storage tank and vaporizer is provided with LNG transfer pump.
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| CN201520972581.5U CN205135814U (en) | 2015-11-27 | 2015-11-27 | System for distributed energy resource station LNG that gasifies |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105401985B (en) * | 2015-11-27 | 2017-12-08 | 中国能源建设集团广东省电力设计研究院有限公司 | Distributed busbar protection gasification LNG system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105401985B (en) * | 2015-11-27 | 2017-12-08 | 中国能源建设集团广东省电力设计研究院有限公司 | Distributed busbar protection gasification LNG system and method |
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