CN202325702U - Natural gas pressure difference power generation system self-adapting to rear-end load change - Google Patents
Natural gas pressure difference power generation system self-adapting to rear-end load change Download PDFInfo
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- CN202325702U CN202325702U CN2011204571742U CN201120457174U CN202325702U CN 202325702 U CN202325702 U CN 202325702U CN 2011204571742 U CN2011204571742 U CN 2011204571742U CN 201120457174 U CN201120457174 U CN 201120457174U CN 202325702 U CN202325702 U CN 202325702U
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Abstract
The utility model discloses a natural gas pressure difference power generation system self-adapting to rear-end load change, which comprises a natural gas pressure difference power generation system and a load automatic bypass pressure reduction and stabilization system, wherein the natural gas pressure difference power generation system mainly comprises parts of a single-stage or multi-stage centripetal turbine expansion unit, an expansion unit front-end preheater, an expansion unit inter-stage intermediate reheater, a speed reducer, a generating unit and the like. The system is mainly characterized in that: a set of load automatic bypass pressure reduction and stabilization system is arranged beside the natural gas pressure difference power generation system to simultaneously operate with the natural gas pressure difference power generation system; and the load automatic bypass pressure reduction and stabilization system is utilized to adjust the volume of natural gas entering a rear-end pipe network, so that the problem of difficulty in meeting the load change existing in the natural gas expansion unit is solved, and the stability and the adaptability of the entire natural gas pressure difference power generation system are greatly improved. Further, a pressure stabilizing valve is additionally arranged at the rear end of the natural gas pressure difference power generation system, and a natural gas pressure stabilizing tank is additionally arranged at the tail end of the system, so that natural gas pressure of the rear-end pipe network can be further stabilized, the stability of the natural gas pressure difference power generation system is improved again, and the adaptability of the natural gas pressure difference power generation system is increased.
Description
Technical field
The utility model relates to waste heat top pressure power generation technical field.
Background technique
Rock gas has elevated pressures after being gone out by underground mining, arrives between tens of MPa at number MPa usually.The long distances of rock gas also is to adopt the above high pressure pipe line of 4MPa to carry; Get into urban pipe network or large-scale during with gas enterprise pipe network; Usually can gas pressure be reduced to middle pressure (about 0.4MPa) through voltage regulating station; The step-down process of rock gas voltage regulating station generally adopts expenditure and pressure, and at present, this part pressure difference energy is not utilized well.
Utilize the pressure reduction of rock gas voltage regulating station to generate electricity, this be China's gas industry discussion for many years, a but problem that is not resolved, its difficulty mainly is:
1, the fluctuation of load of voltage regulating station gas discharge is bigger, and General System is difficult to adapt to;
2, the expansion step-down process temperature that is accompanied by tens of degree even attendes Baidu is fallen, and the rear end natural gas temperature is low excessively to cause the inconvenience of carrying and using;
3, the generating efficiency of system is not high, and cost and benefit can not get good balance.
But the market of rock gas pressure reduction generating is very big, and almost each city all has one to dozens of, even hundreds of high pressure are to the voltage regulating station of middle pressure.Therefore, research and develop a kind of reliable, rock gas pressure reduction electricity generating device that generating efficiency is high, be very important.
Summary of the invention
The purpose of the utility model is the deficiency to the existing technology existence; The rock gas pressure reduction power generation system that a kind of self adaption back-end load changes is proposed; Utilize rock gas pressure reduction to generate electricity; Solve the big problem of fluctuation of load of voltage regulating station gas discharge, promote reliability, stability and the adaptability of whole generating system significantly.
The technological scheme of the utility model is following:
The rock gas pressure reduction power generation system that a kind of self adaption back-end load changes, it comprises load auto by pass lowering and stabilizing blood pressure system and rock gas pressure reduction power generation system.Wherein, said rock gas pressure reduction power generation system connects gas distributing system (being connected by its depressurized system), comprises preheater, reheater, single-stage or multistage centripetal turbine expansion unit, retarder and generator set; The air inlet termination rock gas of said preheater, the inlet end of outlet side order level or multistage centripetal turbine expansion unit, the pto connection reducer of single-stage or multistage centripetal turbine expansion unit, retarder connects generator set again.
Further; Can also be by said rock gas pressure reduction power generation system; Be in parallel installed with a cover load auto by pass lowering and stabilizing blood pressure system; Move during with rock gas pressure reduction power generation system same, said load auto by pass lowering and stabilizing blood pressure system is the voltage regulating station of gas distributing system self, or automatic pressure reducing valve group or decompression stable-pressure device.Like this, through the mode of load auto by pass lowering and stabilizing blood pressure system and the parallel running of rock gas pressure reduction power generation system, make whole system well adapt to the variation of rear end rock gas load.
Further, the single-stage of said rock gas pressure reduction power generation system or multistage centripetal turbine expansion unit all can be connected in series reheater (as carrying out resuperheat between one section expansion of expansion unit, two sections expansions, three sections expansions) between every grade in carrying out the multistage expansion process.Like this, through repeatedly preheating and heat again,, promote generating efficiency significantly through increasing the enthalpy drop of unit.
In addition, behind the outlet side of said rock gas pressure reduction power generation system, but on the outlet pipe before load auto by pass lowering and stabilizing blood pressure system and the merging of rock gas pressure reduction power generation system, can connect a pressure maintaining valve.
Further; In the single-stage of said rock gas pressure reduction power generation system or the outlet side of multistage centripetal turbine expansion unit; Or the outlet side of load auto by pass lowering and stabilizing blood pressure system; Or can be connected a surge tank on the outlet pipe after load auto by pass lowering and stabilizing blood pressure system and the merging of rock gas pressure reduction power generation system, make supply gas pressure more stable.
The advantage of the utility model is:
1, adopts multistage centripetal turbine expansion unit as power equipment, reduce the speed ratio of rotating speed and retarder as far as possible, increase system reliability;
2, in expansion system, design preheating, reheat machine make full use of preheating, hot to improve system's generating efficiency again, have also improved the temperature of rear end rock gas simultaneously, a solution natural gas transport and an awkward difficult problem;
3, adopt rock gas load auto by pass lowering and stabilizing blood pressure system, adapt to the fluctuation of rock gas load;
4, increase stable-pressure device, further stable system output gas pressure.
Description of drawings
Fig. 1 changes the system diagram of rock gas pressure reduction generating for the self adaption back-end load.
Fig. 2 is the system diagram of rock gas expansion power generation unit.
Embodiment
The rock gas pressure reduction power generation system that the self adaption back-end load that the utility model is provided below in conjunction with accompanying drawing and embodiment changes is elaborated.
Like Fig. 1, shown in Figure 2, this rock gas pressure reduction power generation system is made up of rock gas load auto by pass lowering and stabilizing blood pressure system 1, rock gas pressure reduction power generation system 2, pressure maintaining valve 3 and surge tank 4 etc.
As shown in Figure 2, rock gas pressure reduction power generation system 2 mainly comprises front end preheater 5, resuperheater 6, multistage centripetal turbine expansion unit 7, retarder 11 and generator set 12.The air inlet termination rock gas of said preheater 5, the inlet end of outlet side order level or multistage centripetal turbine expansion unit 7, the pto connection reducer 11 of multistage centripetal turbine expansion unit 7, retarder 11 connects generator set 12 again.All can be connected in series reheater 6 between carry out in the multistage expansion process at the multistage centripetal turbine expansion unit 7 of rock gas pressure reduction power generation system 2 every grade.
Referring to Fig. 1; Other in rock gas pressure reduction power generation system 2; Be in parallel installed with a cover load auto by pass lowering and stabilizing blood pressure system 1; Move simultaneously with rock gas pressure reduction power generation system 2, load auto by pass lowering and stabilizing blood pressure system 1 is the voltage regulating station of gas distributing system self, or automatic pressure reducing valve group or decompression stable-pressure device.On the outlet pipe after load auto by pass lowering and stabilizing blood pressure system 1 and 2 merging of rock gas pressure reduction power generation system, can be connected surge tank 4.Behind the outlet side of said rock gas pressure reduction power generation system 2, but on the pipeline before load auto by pass lowering and stabilizing blood pressure system 1 merges with rock gas pressure reduction power generation system 2, can connect pressure maintaining valve 3.
Working method: system is according to rear end rock gas load condition; Part rock gas at first gets into rock gas pressure reduction power generation system 2 and carries out one or more snippets expansion; Drive generator set 12 generatings through retarder 11; Can carry out voltage stabilizing once more through the pressure maintaining valve 3 that increases in rock gas pressure reduction power generation system 2 rear ends; Another part rock gas then gets into load auto by pass lowering and stabilizing blood pressure system, according to the variation of rear end rock gas load, supplies rock gas automatically, to satisfy the demand of rear end rock gas.Be connected surge tank 4 on the pipeline after load auto by pass lowering and stabilizing blood pressure system 1 and 2 merging of rock gas pressure reduction power generation system, rock gas can get into surge tank 4 once more, supplies with the downstream pipe network at last.
And rock gas gets into before single-stage or multistage centripetal turbine expansion unit 7 expand; Can carry out front end preheating 5 earlier, can also carry out all carrying out between every grade in the multistage expansion process again heat (can carry out reheater 6 between 9, the three sections expansions 10 of 8, two sections expansions of one section expansion like the expansion unit) at the expansion unit.Like this, the enthalpy drop through unit significantly increases, and promotes generating efficiency significantly, and can promote the temperature of the back rock gas that expands, and has well solved low excessively conveying and the awkward problem of bringing of rock gas Yin Wendu after expanding.
Like this, through repeatedly preheating and heat again,, greatly promoted generating efficiency through increasing the enthalpy drop of unit.And owing to increased load auto by pass lowering and stabilizing blood pressure system 1 and pressure maintaining valve 3 and surge tank 4, well solved the big problem of fluctuation of load of voltage regulating station gas discharge, promoted the reliability and the stability of whole generating system significantly.
Claims (5)
1. the rock gas pressure reduction power generation system that changes of a self adaption back-end load, it is characterized in that: it comprises load auto by pass lowering and stabilizing blood pressure system (1) and rock gas pressure reduction power generation system (2);
Wherein, said rock gas pressure reduction power generation system (2) connects gas distributing system, comprises preheater (5), single-stage or multistage centripetal turbine expansion unit (7), retarder (11) and generator set (12); The air inlet termination rock gas of said preheater (5); The inlet end of outlet side order level or multistage centripetal turbine expansion unit (7); The pto connection reducer (11) of single-stage or multistage centripetal turbine expansion unit (7), retarder (11) connects generator set (12) again.
2. the rock gas pressure reduction power generation system that self adaption back-end load according to claim 1 changes; It is characterized in that; In the other cover load auto by pass lowering and stabilizing blood pressure system (1) that is in parallel installed with of said rock gas pressure reduction power generation system (2); Move simultaneously with rock gas pressure reduction power generation system (2), said load auto by pass lowering and stabilizing blood pressure system (1) is the voltage regulating station of gas distributing system self, or automatic pressure reducing valve group or decompression stable-pressure device.
3. the rock gas pressure reduction power generation system that self adaption back-end load according to claim 1 changes; It is characterized in that the single-stage of said rock gas pressure reduction power generation system (2) or multistage centripetal turbine expansion unit (7) are connected in series reheater (6) between every grade of expansion.
4. the rock gas pressure reduction power generation system that self adaption back-end load according to claim 1 changes; It is characterized in that; Behind the outlet side of said rock gas pressure reduction power generation system (2); But on the outlet pipe before load auto by pass lowering and stabilizing blood pressure system (1) and rock gas pressure reduction power generation system (2) merging, connect pressure maintaining valve (3).
5. the rock gas pressure reduction power generation system that self adaption back-end load according to claim 1 changes; It is characterized in that; In the single-stage of said rock gas pressure reduction power generation system (2) or the outlet side of multistage centripetal turbine expansion unit (7); Or the outlet side of load auto by pass lowering and stabilizing blood pressure system (1), or be connected surge tank (4) on the outlet pipe after load auto by pass lowering and stabilizing blood pressure system (1) and rock gas pressure reduction power generation system (2) merging.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204571742U CN202325702U (en) | 2011-11-17 | 2011-11-17 | Natural gas pressure difference power generation system self-adapting to rear-end load change |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011204571742U CN202325702U (en) | 2011-11-17 | 2011-11-17 | Natural gas pressure difference power generation system self-adapting to rear-end load change |
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| CN202325702U true CN202325702U (en) | 2012-07-11 |
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| CN2011204571742U Expired - Fee Related CN202325702U (en) | 2011-11-17 | 2011-11-17 | Natural gas pressure difference power generation system self-adapting to rear-end load change |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383870A (en) * | 2011-11-17 | 2012-03-21 | 重庆川然节能技术有限公司 | Natural gas pressure difference generating system self-adaptive to back-end load change |
| CN102900640A (en) * | 2012-10-22 | 2013-01-30 | 成都昊特新能源技术有限公司 | Device for generating power by using pressure difference energy of natural gas delivery pipeline |
| CN103306761A (en) * | 2013-06-27 | 2013-09-18 | 西南石油大学 | Pressure energy power generation system adopting wellhead natural gas |
| CN104110279A (en) * | 2013-04-19 | 2014-10-22 | 天津大学 | Top-pressure power generation assembly in natural gas valve station and multi-stage power generation system with top-pressure power generation assembly |
| CN109404235A (en) * | 2018-12-04 | 2019-03-01 | 上海海洋大学 | A kind of turbine type excess pressure power generating device of thermal gradient energy power generation |
| CN114738060A (en) * | 2022-04-25 | 2022-07-12 | 武汉理工大学 | Natural gas pressure difference driving power generation system |
-
2011
- 2011-11-17 CN CN2011204571742U patent/CN202325702U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383870A (en) * | 2011-11-17 | 2012-03-21 | 重庆川然节能技术有限公司 | Natural gas pressure difference generating system self-adaptive to back-end load change |
| CN102900640A (en) * | 2012-10-22 | 2013-01-30 | 成都昊特新能源技术有限公司 | Device for generating power by using pressure difference energy of natural gas delivery pipeline |
| CN104110279A (en) * | 2013-04-19 | 2014-10-22 | 天津大学 | Top-pressure power generation assembly in natural gas valve station and multi-stage power generation system with top-pressure power generation assembly |
| CN103306761A (en) * | 2013-06-27 | 2013-09-18 | 西南石油大学 | Pressure energy power generation system adopting wellhead natural gas |
| CN109404235A (en) * | 2018-12-04 | 2019-03-01 | 上海海洋大学 | A kind of turbine type excess pressure power generating device of thermal gradient energy power generation |
| CN109404235B (en) * | 2018-12-04 | 2024-03-29 | 上海海洋大学 | Turbine type residual pressure power generation device capable of generating power by temperature difference energy |
| CN114738060A (en) * | 2022-04-25 | 2022-07-12 | 武汉理工大学 | Natural gas pressure difference driving power generation system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20191117 |
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| CF01 | Termination of patent right due to non-payment of annual fee |