CN204225931U - A kind of pressure energy recovery turbo-expander - Google Patents
A kind of pressure energy recovery turbo-expander Download PDFInfo
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- CN204225931U CN204225931U CN201420530298.2U CN201420530298U CN204225931U CN 204225931 U CN204225931 U CN 204225931U CN 201420530298 U CN201420530298 U CN 201420530298U CN 204225931 U CN204225931 U CN 204225931U
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Abstract
A kind of pressure energy recovery turbo-expander, comprise gas-bearing expansion turbine, high-pressure natural gas is after purification plant, precooler, enter the air inlet volute of gas-bearing expansion turbine, air-flow after expansion is discharged through jacket, exhaust expander, the gas of discharging enters heat exchanger, sucks cold, then after precooler, import down stream low pressure pipe network by coolant media; Another pass of described purification plant goes out the bearing gas joint entering gas-bearing expansion turbine through filter, reduction valve, to the pressure chamber of left gas bearing and right gas bearing, collected in bearing housing by the gas after bearing, draw from bearing exhaust joint again, import down stream low pressure pipe network together.Have and implement very convenient, to be applicable to high rotating speed occasion feature.
Description
Technical field
The utility model relates to a kind of pressure energy recovery turbo-expander.
Background technique
Gas distributing system pressure, far above the use pressure of user, contains huge pressure energy, but when supplying end user after voltage regulating station pressure regulation, this part pressure energy will lose in a large number; The recovery of this energy, by the performance driving economy of the comprehensive utilization ratio and pipe network that effectively improve the energy.
The recovery of current domestic natural gas pipe network pressure energy, usual employing turbo-expander and combination technique thereof, agent technology produces cold by high-pressure natural gas adiabatic expansion in turbo-expander, export external work simultaneously, gas distributing system pressure and terminal pressure have very large pressure reduction, can produce a large amount of pressure energies in pressure regulation process.Turbo-expander has been widely used in the recovery of this part pressure energy.Utilize turbo-expander that pressure energy is converted into mechanical energy and low-temperature receiver, for generating and natural gas liquefaction etc.
Turbo-expander at present for the routine of natural gas pipe network pressure energy recovery is oil bearing turbo-expander, employing oil-lubricated bearing supports, and is applicable to the occasion compared with atm number, but for lofty tone pressure ratio, occasion that tolerance is less, decompressor rotating speed is very high, and oil bearing turbo-expander is difficult to be suitable for.
Model utility content
Its object of the utility model is just to provide a kind of pressure energy recovery turbo-expander, has and implements very convenient, to be applicable to high rotating speed occasion feature.
Realize above-mentioned purpose and the technological scheme taked, comprise gas-bearing expansion turbine, high-pressure natural gas is after purification plant, precooler, enter the air inlet volute of gas-bearing expansion turbine, air-flow after expansion is discharged through jacket, exhaust expander, the gas of discharging enters heat exchanger, sucks cold, then after precooler, import down stream low pressure pipe network by coolant media; Another pass of described purification plant goes out the bearing gas joint entering gas-bearing expansion turbine through filter, reduction valve, to the pressure chamber of left gas bearing and right gas bearing, collected in bearing housing by the gas after bearing, draw from bearing exhaust joint again, import down stream low pressure pipe network together.
Compared with prior art the utility model has the following advantages.
1) little tolerance high pressure ratio occasion, turbo-expander rotating speed is high, rotor journal linear velocity is high, and easily cause bearing film temperature too high, oil viscosity significantly reduces, bearing load carrying capacity is declined to a great extent, thus cause decompressor failure accidents, because gas bearing adopts air film supporting, hardly by the impact of gas temperature, bearing does not directly contact with axle journal, is applicable to high rotating speed occasion;
2) the bearing gas of turbo-expander can directly adopt pipe network gas, and enter expander shaft after micro-high-pressure natural gas reduces pressure after filtration and hold, this strand of gas purging can import low-pressure pipe network, implements very convenient;
3) turbo-expander does not need, for pressure oil, to eliminate attached oil supply system.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is this device flowage structure schematic diagram;
Fig. 2 is gas-bearing expansion turbine structural representation in this device.
Embodiment
This device comprises gas-bearing expansion turbine, as shown in Figure 1 and Figure 2, high-pressure natural gas is after purification plant, precooler, enter the air inlet volute 2 of gas-bearing expansion turbine, air-flow after expansion is discharged through jacket 15, exhaust expander 1, the gas of discharging enters heat exchanger, sucks cold, then after precooler, import down stream low pressure pipe network by coolant media; Another pass of described purification plant goes out the bearing gas joint 8 entering gas-bearing expansion turbine through filter, reduction valve, to the pressure chamber of left gas bearing 6 and right gas bearing 9, collected in bearing housing 7 by the gas after bearing, draw from bearing exhaust joint 11 again, import down stream low pressure pipe network together.
Embodiment
As shown in Figure 1, the high-pressure natural gas come from natural gas high pressure pipe network is pre-chilled to after uniform temperature through precooler through purification plant dedusting again, enter gas-bearing expansion turbine to expand, in decompressor, rock gas enters from air inlet volute 2, carry out distribution of air flow by air inlet volute to enter nozzle 4 and accelerate, kinetic energy can be converted into by interior, temperature declines, high velocity air after the acceleration wheel 3 that pushes the work forward rotarily drives main shaft 12 and exports external work, rock gas continues to expand after entering active wheel, temperature continues to reduce, air-flow after expansion is through jacket 15, exhaust expander 1 reduction of speed is discharged, heat exchanger is entered from decompressor low temperature low pressure gas out, cold is sucked by coolant media, down stream low pressure pipe network is imported again after precooler re-heat, turbo-expander main shaft 12 right-hand member can be given a dinner for a visitor from afar machine impeller of booster or generator retarder, the external work exported when absorbing gas expansion, for gas boosting or generating.The cold that coolant media sucks can be used for natural gas liquefaction, ice making etc.
As shown in Figure 2, bearing gas is drawn after purification plant, turbo-expander is entered through accurate filter, reduction valve, gas enters into the pressure chamber of left gas bearing 6 and right gas bearing 9 from bearing gas joint 8, axle journal is entered again and thrust surface produces air film by the capillary tube of bearing or throttling pore, main shaft 12 is not directly contacted with left gas bearing 6, right gas bearing 9, thus ensure that main shaft can run up, collected in bearing housing 7 by the gas after bearing, draw from bearing exhaust joint 11 again, import down stream low pressure pipe network together.
Claims (1)
1. a pressure energy recovery turbo-expander, comprise gas-bearing expansion turbine, it is characterized in that, high-pressure natural gas is after purification plant, precooler, enter the air inlet volute (2) of gas-bearing expansion turbine, the air-flow after expansion is discharged through jacket (15), exhaust expander (1), and the gas of discharge enters heat exchanger, suck cold by coolant media, then after precooler, import down stream low pressure pipe network; Another pass of described purification plant goes out the bearing gas joint (8) entering gas-bearing expansion turbine through filter, reduction valve, to the pressure chamber of left gas bearing (6) and right gas bearing (9), collected in bearing housing (7) by the gas after bearing, draw from bearing exhaust joint (11) again, import down stream low pressure pipe network together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420530298.2U CN204225931U (en) | 2014-09-16 | 2014-09-16 | A kind of pressure energy recovery turbo-expander |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420530298.2U CN204225931U (en) | 2014-09-16 | 2014-09-16 | A kind of pressure energy recovery turbo-expander |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204225931U true CN204225931U (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420530298.2U Active CN204225931U (en) | 2014-09-16 | 2014-09-16 | A kind of pressure energy recovery turbo-expander |
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| CN (1) | CN204225931U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674057A (en) * | 2016-01-28 | 2016-06-15 | 侯奕 | Natural gas pressure difference energy recovery and liquid oxygen generation integrated system |
| CN105952502A (en) * | 2016-04-28 | 2016-09-21 | 北京科技大学 | Device and method for improving bearing capacity of dynamic-pressure gas bearings of turbine expansion machine |
| CN106564861A (en) * | 2016-11-09 | 2017-04-19 | 华南理工大学 | Process for efficiently recovering reforming gas energy in hydrocarbon steam reforming hydrogen production process |
| CN107882604A (en) * | 2017-12-07 | 2018-04-06 | 刘强 | Pressure energy reclaimer and pipeline pressure energy recovery system |
| CN114008397A (en) * | 2019-06-27 | 2022-02-01 | 乔治洛德方法研究和开发液化空气有限公司 | Apparatus and method for liquefying gas |
-
2014
- 2014-09-16 CN CN201420530298.2U patent/CN204225931U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674057A (en) * | 2016-01-28 | 2016-06-15 | 侯奕 | Natural gas pressure difference energy recovery and liquid oxygen generation integrated system |
| CN105952502A (en) * | 2016-04-28 | 2016-09-21 | 北京科技大学 | Device and method for improving bearing capacity of dynamic-pressure gas bearings of turbine expansion machine |
| CN105952502B (en) * | 2016-04-28 | 2018-05-18 | 北京科技大学 | A kind of device and method for improving turbo-expander hydrodynamic gas-lubricated bearing bearing capacity |
| CN106564861A (en) * | 2016-11-09 | 2017-04-19 | 华南理工大学 | Process for efficiently recovering reforming gas energy in hydrocarbon steam reforming hydrogen production process |
| CN107882604A (en) * | 2017-12-07 | 2018-04-06 | 刘强 | Pressure energy reclaimer and pipeline pressure energy recovery system |
| CN114008397A (en) * | 2019-06-27 | 2022-02-01 | 乔治洛德方法研究和开发液化空气有限公司 | Apparatus and method for liquefying gas |
| CN114008397B (en) * | 2019-06-27 | 2023-09-22 | 乔治洛德方法研究和开发液化空气有限公司 | Apparatus and method for liquefying gas |
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