CN213684252U - Steam-electricity dual-drive system - Google Patents
Steam-electricity dual-drive system Download PDFInfo
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- CN213684252U CN213684252U CN202022361705.XU CN202022361705U CN213684252U CN 213684252 U CN213684252 U CN 213684252U CN 202022361705 U CN202022361705 U CN 202022361705U CN 213684252 U CN213684252 U CN 213684252U
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- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- 230000009977 dual effect Effects 0.000 claims 1
- 238000009776 industrial production Methods 0.000 abstract description 10
- 239000002918 waste heat Substances 0.000 abstract description 9
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Abstract
The utility model discloses a steam-electricity double-drive system, belonging to the technical field of power equipment, comprising a screw expander, a reduction gearbox, a clutch, a double-shaft extension asynchronous motor and a rotary auxiliary machine which are connected in sequence; the screw expander comprises an expander air inlet pipeline and an expander exhaust pipeline, and the expander air inlet pipeline and the expander exhaust pipeline are respectively communicated with the steam pipeline; the steam pipeline is provided with a pressure reducing valve, the air inlet pipeline of the expansion machine is provided with a quick-break valve and an adjusting valve, and the exhaust pipeline of the expansion machine is provided with a check valve. The steam-electricity dual-drive system is suitable for small-sized dragging projects, can meet the requirements of the small-sized dragging projects in the range of 100kW-3000kW, and is wide in selection range; the rotary auxiliary machine is driven together by matching a specific selection screw expander with the double-shaft extension asynchronous motor, so that the steam-electricity double-drive function is realized; the equipment investment is low, the stable operation of the rotary auxiliary machine can be effectively ensured, and the large-scale industrial production can be facilitated to generate a large amount of low-grade waste heat, so that the method is green and environment-friendly.
Description
Technical Field
The utility model belongs to the technical field of power equipment, concretely relates to vapour electricity is two to be driven system.
Background
Steam dragging refers to a technology of directly dragging a rotary auxiliary machine (such as a compressor, a water pump, a fan and the like) by utilizing the power of an output shaft of steam power equipment, and is widely applied to the fields of power plants, chemical engineering, metallurgy and the like. Compared with the steam power equipment which drives the generator to generate electricity and then drives the rotary auxiliary machine by the motor, the investment of the generator and the motor can be reduced by adopting the steam dragging technology, the loss in the energy conversion and transmission process is reduced, and the steam power equipment has the advantages of high operation efficiency and less equipment investment. At present, steam turbines are widely used in large-scale industrial production as steam power equipment for steam dragging, and are driven by steam generated by boilers. The steam turbine is used as a general dragging project of a small auxiliary machine with the installed capacity being larger and not suitable for being used below 1MW, the steam turbine is used as a speed type machine, the requirement on steam grade is higher, the problem that water erosion damages blades can be avoided only by a certain superheat degree, the phenomenon of vehicle jumping is easily caused by efficiency reduction or even caused by steam working condition fluctuation, meanwhile, a large amount of low-grade waste heat can be generated in large-scale industrial production, the resource steam turbine can not be effectively utilized, and the energy waste phenomenon exists.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to solve the technical problems that: the utility model provides a steam-electricity double-drive system that is fit for small-size dragging project and can utilize waste heat in the industrial production.
In order to solve the technical problem, the utility model discloses a technical scheme be: a steam-electricity double-drive system comprises a screw expander, a reduction gearbox, a clutch, a double-shaft extension asynchronous motor and a rotary auxiliary machine which are sequentially connected;
the screw expander comprises an expander air inlet pipeline and an expander exhaust pipeline, and the expander air inlet pipeline and the expander exhaust pipeline are respectively communicated with the steam pipeline;
the steam pipeline is provided with a pressure reducing valve at the part between the joints of the expansion machine air inlet pipeline and the expansion machine exhaust pipeline, the expansion machine air inlet pipeline is provided with a quick-break valve and an adjusting valve, the adjusting valve is arranged close to the screw expansion machine, and the expansion machine exhaust pipeline is provided with a check valve.
Wherein the clutch is an overrunning clutch.
The screw expander, the reduction gearbox, the clutch, the double-shaft extension asynchronous motor and the rotary auxiliary machine are coaxially arranged.
The working medium of the steam-electricity double-drive system is hot steam, saturated steam and a steam-water mixture.
The beneficial effects of the utility model reside in that: the utility model provides a steam-electricity double-drive system which is suitable for small-sized dragging projects, can meet the small-sized dragging projects within the range of 100kW-3000kW, and has wide selection range; the rotary auxiliary machine is driven together by matching a specific selection screw expander with the double-shaft extension asynchronous motor, so that a steam-electricity double-drive function is realized, the adaptability to steam fluctuation is strong, a large amount of low-grade waste heat generated in industrial production can be effectively utilized for dragging or generating electricity, superheated steam, saturated steam, steam-water mixture and the like can also be utilized, and the requirement on the cleanliness of working media is not high; the steam-electricity dual-drive system is low in equipment investment, can effectively guarantee stable operation of the rotary auxiliary machine, can utilize a large amount of low-grade waste heat generated in large-scale industrial production, and is green and environment-friendly.
Drawings
Fig. 1 is a schematic structural diagram of a steam-electric dual-drive system according to an embodiment of the present invention;
description of reference numerals: 1. a screw expander; 2. a reduction gearbox; 3. a clutch; 4. a double-shaft extension asynchronous motor; 5. rotating the auxiliary machine; 6. a pressure reducing valve; 7. a quick-break valve; 8. adjusting a valve; 9. a check valve; 10. a steam line; 11. an expander inlet duct; 12. expander exhaust duct.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1, the utility model discloses a steam-electricity dual-drive system, which comprises a screw expander 1, a reduction box 2, a clutch 3, a double-shaft extension asynchronous motor 4, a rotary auxiliary machine 5 and a steam pipeline communication 10, which are connected in sequence;
the screw expander 1 comprises an expander air inlet pipeline 11 and an expander exhaust pipeline 12, and the expander air inlet pipeline 11 and the expander exhaust pipeline 12 are respectively communicated with the steam pipeline 10;
the pressure reducing valve 6 is arranged at the part between the joints of the steam pipeline 10, the expander air inlet pipeline 11 and the expander exhaust pipeline 12, the quick-break valve 7 and the regulating valve 8 are arranged on the expander air inlet pipeline 11, the regulating valve 8 is arranged close to the screw expander 1, and the check valve 9 is arranged on the expander exhaust pipeline 12.
The utility model discloses a working process does: when the equipment (the steam-electricity dual-drive system) is standby, steam enters the steam pipeline 10, is decompressed by the decompression valve 6 and then directly enters a subsequent process for use;
when the equipment is started, the quick-break valve 7 is opened, steam enters the expander air inlet pipeline 11, then the regulating valve 8 is gradually opened, the steam starts to rush to rotate the screw expander 1, and enters the subsequent process through the expander exhaust pipeline 12;
the screw expander 1 drives the reduction gearbox 2 to output the rotating speed by rotating, when the rotating speed is lower than that of the double-shaft extension asynchronous motor 4, the clutch 3 is in a separation state, and the rotary auxiliary machine 5 is driven by the double-shaft extension asynchronous motor 4; when the opening degree of the regulating valve 8 is continuously increased to enable the output rotating speed of the speed reducer to be equal to the rotating speed of the double-shaft extension asynchronous motor 4, the clutch 3 is in a combined state, the rotary auxiliary machine 5 starts to be driven by the screw expander 1 and the double-shaft extension asynchronous motor 4 together, and as the steam inlet quantity is continuously increased, the load proportion borne by the screw expander 1 is continuously increased until the driving force required by the rotary auxiliary machine 5 is completely borne; when the rotating speed of the system exceeds the synchronous rotating speed of the double-shaft extension asynchronous motor 4, the double-shaft extension asynchronous motor 4 is used as a generator to output electric energy outwards;
when the equipment needs to be closed, the opening degree of the regulating valve 8 is gradually reduced, so that the rotating speed of the screw expander 1 is lower than that of the double-shaft extension asynchronous motor 4, the clutch 3 is separated, the rotary auxiliary machine 5 is completely electrically dragged, and when the rotating speed is low enough, the quick-break valve 7 is closed, so that the screw expander 1 is normally stopped.
From the above description, the beneficial effects of the present invention are: the utility model provides a steam-electricity double-drive system which is suitable for small-sized dragging projects, can meet the small-sized dragging projects within the range of 100kW-3000kW, and has wide selection range; the rotary auxiliary machine is driven together by matching a specific selection screw expander with the double-shaft extension asynchronous motor, so that a steam-electricity double-drive function is realized, the adaptability to steam fluctuation is strong, a large amount of low-grade waste heat generated in industrial production can be effectively utilized for dragging or generating electricity, superheated steam, saturated steam, steam-water mixture and the like can also be utilized, and the requirement on the cleanliness of working media is not high;
when the steam quantity is sufficient, the load of the rotary auxiliary machine is completely provided by the screw expander, the double-shaft extension asynchronous motor operates in no-load mode, and if the screw expander has surplus shaft power, the surplus shaft power can be used as the electric energy output by the generator through the double-shaft extension asynchronous motor; when the steam quantity is not enough and the running of the rated working condition of the rotary auxiliary machine cannot be met, the double-shaft extension asynchronous motor and the screw expander cooperate to provide shaft power required by the full-load running of the rotary auxiliary machine; when the steam quantity is seriously insufficient and the no-load rotation of the screw expander cannot be met, a clutch in the system is separated, the screw expander is stopped, and the rotary auxiliary machine is independently dragged by a double-shaft-extension asynchronous motor, so that the stable operation of the rotary auxiliary machine is effectively ensured; the problems that an additional motor is needed to be arranged in a traditional system to drive the same-specification rotary auxiliary machine to be used as a spare, starting is not timely, control is difficult, equipment investment is large and the like are prone to occur are solved;
the utility model provides a vapour electricity is two to drive system equipment investment is low, can effectively guarantee the steady operation of rotatory auxiliary engine, and can produce a large amount of low-grade waste heat, green in the large-scale industrial production of profit.
Further, the clutch 3 is an overrunning clutch 3.
Further, the screw expander 1, the reduction gearbox 2, the clutch 3, the double-shaft extension asynchronous motor 4 and the rotary auxiliary machine 5 are coaxially arranged.
Furthermore, the working medium of the steam-electricity double-drive system is hot steam, saturated steam and a steam-water mixture.
From the above description, it can be known that, because the screw expander is selected particularly for the steam-electricity dual-drive system, and the screw expander is a rotary positive displacement expander, the flow velocity in the steam flow velocity rotor cavity is very low, the rotor cannot be eroded, the steam with high water content can be effectively utilized, and no requirement is imposed on the steam superheat degree.
Further, the regulating valve is a pneumatic regulating valve, an electric regulating valve or a hydraulic regulating valve.
Example 1:
a steam-electricity double-drive system comprises a screw expander 1, a reduction gearbox 2, an overrunning clutch, a double-shaft extension asynchronous motor 4 and a rotary auxiliary machine 5 which are connected in sequence;
the screw expander 1 comprises an expander air inlet pipeline 11 and an expander exhaust pipeline 12, and the expander air inlet pipeline 11 and the expander exhaust pipeline 12 are respectively communicated with the steam pipeline 10;
the steam pipeline 10 is provided with a pressure reducing valve 6 with the part between the joints of the expander air inlet pipeline 11 and the expander exhaust pipeline 12, the expander air inlet pipeline 11 is provided with a quick-break valve 7 and an electric regulating valve, the electric regulating valve is arranged close to the screw expander 1, and the expander exhaust pipeline 12 is provided with a check valve 9.
The screw expander 1, the reduction gearbox 2, the overrunning clutch, the double-shaft extension asynchronous motor 4 and the rotary auxiliary machine 5 are coaxially arranged.
Example 2:
a steam-electricity double-drive system comprises a screw expander 1, a reduction gearbox 2, an overrunning clutch, a double-shaft extension asynchronous motor 4 and a rotary auxiliary machine 5 which are coaxially arranged and sequentially connected;
the screw expander 1 comprises an expander air inlet pipeline 11 and an expander exhaust pipeline 12, and the expander air inlet pipeline 11 and the expander exhaust pipeline 12 are respectively communicated with the steam pipeline 10;
the steam pipeline 10 is provided with a pressure reducing valve 6 with the part between the joints of the expander air inlet pipeline 11 and the expander exhaust pipeline 12, the expander air inlet pipeline 11 is provided with a quick-break valve 7 and a pneumatic regulating valve, the pneumatic regulating valve is arranged close to the screw expander 1, and the expander exhaust pipeline 12 is provided with a check valve 9.
In conclusion, the steam-electric double-drive system provided by the utility model is suitable for small-sized dragging projects, can meet the small-sized dragging projects within the range of 100kW-3000kW, and has a wide selection range; the rotary auxiliary machine is driven together by matching a specific selection screw expander with the double-shaft extension asynchronous motor, so that a steam-electricity double-drive function is realized, the adaptability to steam fluctuation is strong, a large amount of low-grade waste heat generated in industrial production can be effectively utilized for dragging or generating electricity, superheated steam, saturated steam, steam-water mixture and the like can also be utilized, and the requirement on the cleanliness of working media is not high; the steam-electricity dual-drive system is low in equipment investment, can effectively guarantee stable operation of the rotary auxiliary machine, can be beneficial to large-scale industrial production to generate a large amount of low-grade waste heat, and is green and environment-friendly.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (5)
1. A steam-electricity double-drive system is characterized by comprising a screw expander, a reduction gearbox, a clutch, a double-shaft extension asynchronous motor and a rotary auxiliary machine which are sequentially connected;
the screw expander comprises an expander air inlet pipeline and an expander exhaust pipeline, and the expander air inlet pipeline and the expander exhaust pipeline are respectively communicated with the steam pipeline;
the steam pipeline is provided with a pressure reducing valve at the part between the joints of the expansion machine air inlet pipeline and the expansion machine exhaust pipeline, the expansion machine air inlet pipeline is provided with a quick-break valve and an adjusting valve, the adjusting valve is arranged close to the screw expansion machine, and the expansion machine exhaust pipeline is provided with a check valve.
2. A gasoline and electric double drive system as claimed in claim 1, wherein the clutch is an overrunning clutch.
3. The steam-electric dual-drive system as recited in claim 1, wherein the screw expander, the reduction gearbox, the clutch, the dual-extension asynchronous motor and the rotary auxiliary machine are coaxially arranged.
4. The steam-electric double-drive system according to claim 1, wherein the working medium of the steam-electric double-drive system is hot steam, saturated steam or a steam-water mixture.
5. The gas-electric dual drive system according to claim 1, wherein the regulating valve is a pneumatic regulating valve, an electric regulating valve or a hydraulic regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022361705.XU CN213684252U (en) | 2020-10-22 | 2020-10-22 | Steam-electricity dual-drive system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022361705.XU CN213684252U (en) | 2020-10-22 | 2020-10-22 | Steam-electricity dual-drive system |
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| CN213684252U true CN213684252U (en) | 2021-07-13 |
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| CN202022361705.XU Active CN213684252U (en) | 2020-10-22 | 2020-10-22 | Steam-electricity dual-drive system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118705021A (en) * | 2024-08-29 | 2024-09-27 | 浙江镕达永能压缩机有限公司 | Steam energy level matching system for driving and generating integrated power and operation control method |
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- 2020-10-22 CN CN202022361705.XU patent/CN213684252U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118705021A (en) * | 2024-08-29 | 2024-09-27 | 浙江镕达永能压缩机有限公司 | Steam energy level matching system for driving and generating integrated power and operation control method |
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