CN202391502U - Screw expansion/centripetal turbine low-parameter waste-heat combined generator set - Google Patents
Screw expansion/centripetal turbine low-parameter waste-heat combined generator set Download PDFInfo
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- CN202391502U CN202391502U CN2011204571776U CN201120457177U CN202391502U CN 202391502 U CN202391502 U CN 202391502U CN 2011204571776 U CN2011204571776 U CN 2011204571776U CN 201120457177 U CN201120457177 U CN 201120457177U CN 202391502 U CN202391502 U CN 202391502U
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- centripetal turbine
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Abstract
The utility model relates to a screw expansion/centripetal turbine low-parameter waste-heat combined generator set, comprising a single-stage or multi-stage screw expansion machine set, a single-stage or multi-stage centripetal turbine expansion machine set, a reheater, a speed reducer, a generator set and the like. The screw expansion/centripetal turbine low-parameter waste-heat combined generator set is mainly characterized in that the single-stage or multi-stage centric turbine expansion machine set is additionally arranged at the rear end of the single-stage or multi-stage screw expansion machine set, thus the power of waste heat after expansion is fully utilized to greatly meet requirement of large flow rate of the generator set after expansion, the problem of overhigh vacuum degree after expansion is greatly solved and the power generation efficiency is largely improved. The utility model can further add the reheater between every two stages of the generators so as to further improve the power generation efficiency.
Description
Technical field
The utility model relates to waste heat power generation equipment.
Background technique
In industrial field, a large amount of low level waste heat overbottom pressure (gas of low parameter, liquid, steam etc.) fails to utilize.Low level waste heat overbottom pressure resource exists the characteristics have a large capacity and a wide range and parameter low (pressure, temperature low), disperses, fluctuation big (parameter, changes in flow rate big), change of form (possibly be vapour-liquid two phases greatly; Possibly be gas-solid two phases, or gas-liquid-solid three-phase) etc. characteristics.Many times, these waste heat overbottom pressure resources are difficult to direct utilization, and many factories all hope to use it for generating.
With present technical merit, when vapor pressure is lower than 0.8MPa, adopt traditional steam turbine set generating, its stability, reliability and Economy are all very undesirable.For solving the generating problem of this part low parameter waste heat overbottom pressure, in recent years, the double-screw type decompressor obtains very fast development, and this equipment can be used for low parameter waste heats such as low pressure steam, steam water interface or hot water to generate electricity, and is fine to the adaptability of thermal source.But also there is following problem, seriously restricts its development:
1, system's utilization efficiency of heat energy is low excessively, is merely about 10% ~ 12%.
2, the degree of vacuum of exhaust is too low, only below 0.03MPa, has influence on generating efficiency greatly.At present, twin-screw power generation system efficient is only about 12%.
Summary of the invention
The utility model mainly is exactly to above problem, proposes a kind of new solution, and promptly screw expansion/centripetal turbine low parameter residual heat combining generate electricity unit promotes generating efficiency.
The utility model adopts following technological scheme:
A kind of screw expansion/centripetal turbine low parameter residual heat combining generate electricity unit, it comprises single-stage or multi-stage screw expansion unit, retarder, generator set, single-stage or multistage centripetal turbine expansion unit and reheater.Described system increases single-stage or multistage centripetal turbine expansion unit on the gas circuit rear end of single-stage or multi-stage screw expansion unit or pto; Make full use of the energy of the back waste heat that expands; Adapt to the requirement of the big flow in back that expands well; And well solved the expansion final vacuum and spent a high difficult problem, promoted generating efficiency significantly.
This cogeneration unit specifically can be divided into two kinds of forms, and a kind of is on the pto of single-stage or multi-stage screw expansion unit, to connect first retarder, and first retarder connects first generator set; The rear end, vapour road of said single-stage or multi-stage screw expansion unit connects single-stage or multistage centripetal turbine expansion unit, connects second retarder on the pto of said single-stage or multistage centripetal turbine expansion unit, and second retarder connects second generator set.Further, in multi-stage screw expansion unit (2), between every grade, all reheater can be connected in series, between single-stage or multi-stage screw expansion unit (2) and said single-stage or multistage centripetal turbine expansion unit (6), also reheater can be connected in series.
Adopt the cogeneration unit of the utility model; Single-phase or heterogeneous low parameter waste heat gets into single-stage or multi-stage screw expansion unit expands; Drive the generator set generating through retarder; The generating of the completion first order wherein, carries out can carrying out between every grade in the multistage expansion process resuperheat (can carry out resuperheater between like one section expansion of screw expansion unit, two sections expansions, three sections expansions) at the screw expansion unit; Being expanded by single-stage or multi-stage screw expansion unit, low parameter waste heat later can carry out getting into single-stage behind the resuperheater or multistage centripetal turbine expansion unit expands, and drives the generator set generating through retarder, accomplishes second level generating.
Another kind is on the pto of single-stage or multi-stage screw expansion unit, to connect said single-stage or multistage centripetal turbine expansion unit; Connect first retarder on the pto of said single-stage or multistage centripetal turbine expansion unit, first retarder connects first generator set.Single-phase or heterogeneous low parameter waste heat gets into single-stage or multi-stage screw expansion unit expands; Wherein, Carry out to carry out between every grade in the multistage expansion process resuperheat (can carry out resuperheater between like one section expansion of screw expansion unit, two sections expansions, three sections expansions) at the screw expansion unit; Being expanded by single-stage or multi-stage screw expansion unit, low parameter waste heat later can carry out getting into single-stage behind the resuperheat or multistage centripetal turbine expansion unit expands, and drives the generator set generating through retarder.
The advantage of the utility model is:
1, after the screw expansion level, increases the centripetal turbine level, make full use of the energy of the back waste heat that expands, adapt to the requirement of the big flow in back that expands well; Form twin-screw and add centripetal turbine associating unit replacement twin-screw set; Accomplish generating through the unit mix and match, well solved the low excessively problem of screw expansion unit rear end waste heat degree of vacuum, according to the notion of fire with efficient; This structure can make full use of the useful work (fire is used) of waste heat, and its generating capacity is increased dramatically.
2, system adopts multistage preheating and hot again, replenishes the waste heat energy, increases capacity for work.
Adopt the screw expansion/centripetal turbine cogeneration unit of technique scheme; Its generating efficiency is expected to bring up to about 18%; System effectiveness rises to about 18% ~ 20% from about 10% ~ 12%; The cost increase is controlled in 25%, compares with the twin-screw expander group, and Economy and efficiency of energy utilization all will have significantly lifting.
Description of drawings
Fig. 1 is screw expansion/centripetal turbine low parameter residual heat combining generate electricity unit principle system diagram (double-generator formula).
Fig. 2 is screw expansion/centripetal turbine low parameter residual heat combining generate electricity unit principle system diagram (monomotor formula).
Embodiment
Screw expansion/centripetal turbine low parameter residual heat combining generate electricity the unit that the utility model is provided below in conjunction with accompanying drawing and embodiment is elaborated.
Like Fig. 1, shown in Figure 2; The screw expansion of the utility model/centripetal turbine low parameter residual heat combining generate electricity unit is by multi-stage screw expansion unit 2; Single-stage centripetal turbine expansion unit 6; First and second reheaters, 1,7, the first and second retarders, 8,10, the first and second generator set 9,11 are formed.
Shown in Figure 1 is the cogeneration unit of double-generator formula, and it connects first retarder, 8, the first retarders 8 and connects first generator set 9 on the pto of multi-stage screw expansion unit 2.Connect single-stage centripetal turbine expansion unit 6 in the gas circuit rear end of multi-stage screw expansion unit 2, connect second retarder, 10, the second retarders 10 on the pto of single-stage centripetal turbine expansion unit 6 and connect second generator set 11.In multi-stage screw expansion unit 2, between every grade, all can be connected in series first reheater 1, between multi-stage screw expansion unit 2 and said single-stage centripetal turbine expansion unit 6, also can be connected in series second reheater 7.
Working method: single-phase or heterogeneous low parameter waste heat at first gets into multi-stage screw expansion unit 2 and carries out one or more snippets expansion; Drive 9 generatings of first generator set through first retarder 8; The generating of the completion first order; Wherein, carry out to carry out between every grade in the multistage expansion process resuperheat (expand to carry out centre first reheater 1 like one section screw expansion 3, the two stage screw of screw expansion unit between 4, three sections screw expansions 5) at multi-stage screw expansion unit; Can carry out centre second reheater, 7 back entering single-stage centripetal turbine expansion units 6 by multi-stage screw expansion unit 2 expansions low parameter waste heat later and expand, drive second generator set 11 through second retarder 10 and generate electricity, accomplish second level generating.
Shown in Figure 2 is the cogeneration unit of single power generating type; On the pto of multi-stage screw expansion unit 2, connect said single-stage centripetal turbine expansion unit 6; Pto at single-stage centripetal turbine expansion unit 6 connects first retarder, 8, the first retarders, 8 connections, first generator set 9.In multi-stage screw expansion unit 2, between every grade, all can be connected in series first reheater 1, between multi-stage screw expansion unit 2 and single-stage centripetal turbine expansion unit 6, also can go here and there second reheater 7.
Working method: single-phase or heterogeneous low parameter waste heat gets into single-stage or multi-stage screw expansion unit 2 expands; Wherein, Carry out to carry out between every grade in the multistage expansion process resuperheat (expand to carry out centre first reheater 1 like one section screw expansion 3, the two stage screw of screw expansion unit between 4, three sections screw expansions 5) at screw expansion unit or multistage centripetal turbine expansion unit; Can carry out centre second reheater, 7 back entering single-stage centripetal turbine expansion units 6 by multi-stage screw expansion unit 2 expansions low parameter waste heat later and expand, drive first generator set 9 through first retarder 8 and generate electricity.
This cogeneration unit is accomplished generating through the unit mix and match, like this, through repeatedly preheating and heat again, through increasing the enthalpy drop of unit, has greatly promoted generating efficiency.And owing to increased single-stage or multistage centripetal turbine expansion unit, solved the low excessively problem of screw expansion unit rear end waste heat degree of vacuum well, promoted generating efficiency significantly.
Claims (5)
1. screw expansion/centripetal turbine low parameter residual heat combining generate electricity unit, it comprises single-stage or multi-stage screw expansion unit, retarder and generator set; It is characterized in that, also comprise single-stage or multistage centripetal turbine expansion unit and reheater;
On the gas circuit rear end of said single-stage or multi-stage screw expansion unit or pto, increase single-stage or multistage centripetal turbine expansion unit.
2. screw expansion according to claim 1/centripetal turbine low parameter residual heat combining generate electricity unit is characterized in that, connects first retarder on said single-stage or the multi-stage screw expansion unit pto, and first retarder connects first generator set; The gas circuit rear end of said single-stage or multi-stage screw expansion unit connects single-stage or multistage centripetal turbine expansion unit, connects second retarder on the pto of said single-stage or multistage centripetal turbine expansion unit, and second retarder connects second generator set.
3. screw expansion according to claim 1/centripetal turbine low parameter residual heat combining generate electricity unit; It is characterized in that; Connect said single-stage or multistage centripetal turbine expansion unit on the pto of said single-stage or multi-stage screw expansion unit; Connect first retarder on the pto of said single-stage or multistage centripetal turbine expansion unit, first retarder connects first generator set.
4. according to claim 2 or 3 described screw expansions/centripetal turbine low parameter residual heat combining generate electricity unit, it is characterized in that, all can be connected in series reheater between every grade in said multi-stage screw expansion unit or multistage centripetal turbine expansion unit.
5. according to claim 2 or 3 described screw expansions/centripetal turbine low parameter residual heat combining generate electricity unit, it is characterized in that, between single-stage or multi-stage screw expansion unit and said single-stage or multistage centripetal turbine expansion unit, also be connected in series reheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204571776U CN202391502U (en) | 2011-11-17 | 2011-11-17 | Screw expansion/centripetal turbine low-parameter waste-heat combined generator set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204571776U CN202391502U (en) | 2011-11-17 | 2011-11-17 | Screw expansion/centripetal turbine low-parameter waste-heat combined generator set |
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|---|---|
| CN202391502U true CN202391502U (en) | 2012-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204571776U Expired - Fee Related CN202391502U (en) | 2011-11-17 | 2011-11-17 | Screw expansion/centripetal turbine low-parameter waste-heat combined generator set |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434236A (en) * | 2011-11-17 | 2012-05-02 | 重庆川然节能技术有限公司 | Threaded rod expansion/centripetal turbine low-parameter waste heat combined generator unit |
| CN105051329A (en) * | 2013-01-28 | 2015-11-11 | 伊顿公司 | Multi-stage volumetric fluid expansion device |
-
2011
- 2011-11-17 CN CN2011204571776U patent/CN202391502U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434236A (en) * | 2011-11-17 | 2012-05-02 | 重庆川然节能技术有限公司 | Threaded rod expansion/centripetal turbine low-parameter waste heat combined generator unit |
| CN105051329A (en) * | 2013-01-28 | 2015-11-11 | 伊顿公司 | Multi-stage volumetric fluid expansion device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120822 Termination date: 20201117 |