CN211900705U - Large-scale double-low pressure cylinder steam turbine - Google Patents
Large-scale double-low pressure cylinder steam turbine Download PDFInfo
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- CN211900705U CN211900705U CN202020681993.4U CN202020681993U CN211900705U CN 211900705 U CN211900705 U CN 211900705U CN 202020681993 U CN202020681993 U CN 202020681993U CN 211900705 U CN211900705 U CN 211900705U
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Abstract
The utility model discloses a large-scale two low pressure jar steam turbines, including intermediate pressure jar, first low pressure jar and second low pressure jar, the intermediate pressure jar intercommunication is provided with the middling pressure steam pipe, the intercommunication is provided with first butterfly valve on the middling pressure steam pipe, the tip of middling pressure steam pipe communicates respectively and is provided with first low pressure steam pipe and second low pressure steam pipe, the intercommunication is provided with the second butterfly valve on the first low pressure steam pipe, the intercommunication is provided with the third butterfly valve on the second low pressure steam pipe, first low pressure steam pipe and first low pressure jar intercommunication, second low pressure steam pipe and second low pressure jar intercommunication, the intercommunication is provided with the heat supply steam pipe on the intermediate pressure steam pipe, the heat supply steam pipe is located the front side of first butterfly valve, the intercommunication is provided with the fourth butterfly valve on the heat supply steam pipe, the fourth butterfly valve intercommunication is provided with the heating pipe; the utility model discloses a solve and to have the operation complicacy among the prior art, the lower shortcoming of robustness, reduced the operation complexity to the robustness of turboset has been improved.
Description
Technical Field
The utility model particularly relates to a steam turbine technical field especially relates to a large-scale two low pressure jar steam turbines.
Background
The steam turbine is also called as a steam turbine engine, and is a rotary steam power device.A high-temperature high-pressure steam passes through a fixed nozzle to become an accelerated airflow and then is sprayed onto blades, so that a rotor provided with blade rows rotates, and simultaneously, the rotor does work outwards. Steam turbines are the main equipment of modern thermal power plants, and are also used in the metallurgical industry, chemical industry and ship power plants.
As shown in fig. 1, the current steam turbine cylinder-cutting heat supply system is provided with cooling steam bypasses, that is, one path of the medium pressure cylinder exhaust steam enters the low pressure cylinder through a communicating pipe, and the path is a main steam path, and the other path enters the low pressure cylinder through the cooling steam bypass, and the path is mainly used for adjusting the steam flow entering the low pressure cylinder when the steam flow entering the low pressure cylinder is small. Because the steam entering the low-pressure cylinder enters through two paths, the steam entering the low-pressure cylinder needs to be regulated by respectively operating the main path butterfly valve and the bypass butterfly valve, the complexity of a control system is increased, the workload of operators is increased, the robustness of the control system is reduced, and the probability of misoperation is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects of complex operation and low robustness in the prior art, and providing the large-scale double-low pressure cylinder steam turbine.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
large-scale two low pressure jar steam turbines, including intermediate pressure jar, first low pressure jar and the low pressure jar of second, its characterized in that, the intermediate pressure jar intercommunication is provided with the middling pressure steam pipe, the intercommunication is provided with first butterfly valve on the middling pressure steam pipe, the tip of middling pressure steam pipe communicates respectively and is provided with first low pressure steam pipe and second low pressure steam pipe, the intercommunication is provided with the second butterfly valve on the first low pressure steam pipe, the intercommunication is provided with the third butterfly valve on the second low pressure steam pipe, first low pressure steam pipe with first low pressure jar intercommunication, second low pressure steam pipe with second low pressure jar intercommunication, the intercommunication is provided with the heat supply steam pipe on the middling pressure steam pipe, the heat supply steam pipe is located the front side of first butterfly valve, the intercommunication is provided with the fourth butterfly valve on the heat supply steam pipe, the fourth butterfly valve intercommunication is provided with the heating pipe.
Furthermore, the first butterfly valve, the second butterfly valve, the third butterfly valve and the fourth butterfly valve are all manual butterfly valves of the same type.
Furthermore, the first low-pressure cylinder and the second low-pressure cylinder are both low-pressure turbine cylinders with the same model.
The utility model has the advantages that:
the cooling steam bypass is eliminated, and the stable transition of the large-scale double-low pressure cylinder steam turbine set from the pure condensation working condition to the double-cylinder heat supply working condition is realized through the combined adjustment of the first butterfly valve, the second butterfly valve, the third butterfly valve and the like, so that the complexity of the operation process is reduced, and the reliability of the whole steam turbine set is improved.
Drawings
Fig. 1 is a schematic structural view of a conventional double low-pressure cylinder steam turbine;
fig. 2 is a schematic structural diagram of a large-scale double-low pressure cylinder steam turbine provided by the present invention;
in the figure: 1-intermediate pressure cylinder, 2-first low pressure cylinder, 3-second low pressure cylinder, 4-intermediate pressure steam pipe, 5-first butterfly valve, 6-first low pressure steam pipe, 7-second low pressure steam pipe, 8-second butterfly valve, 9-third butterfly valve, 10-heat supply steam pipe, 11-fourth butterfly valve and 12-heating pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Example 1:
referring to fig. 2, a large double low pressure cylinder steam turbine includes an intermediate pressure cylinder 1, a first low pressure cylinder 2 and a second low pressure cylinder 3, it is characterized in that the intermediate pressure cylinder 1 is communicated with an intermediate pressure steam pipe 4, the intermediate pressure steam pipe 4 is communicated with a first butterfly valve 5, the end part of the middle pressure steam pipe 4 is respectively communicated with a first low pressure steam pipe 6 and a second low pressure steam pipe 7, a second butterfly valve 8 is communicated and arranged on the first low-pressure steam pipe 6, a third butterfly valve 9 is communicated and arranged on the second low-pressure steam pipe 7, the first low-pressure steam pipe 6 is communicated with the first low-pressure cylinder 2, the second low-pressure steam pipe 7 is communicated with the second low-pressure cylinder 3, the middle pressure steam pipe 4 is communicated with a heat supply steam pipe 10, the heat supply steam pipe 10 is positioned at the front side of the first butterfly valve 5, a fourth butterfly valve 11 is communicated with the heat supply steam pipe 10, and a heating pipe 12 is communicated with the fourth butterfly valve 11; the first butterfly valve 5, the second butterfly valve 8, the third butterfly valve 9 and the fourth butterfly valve 11 are all manual butterfly valves with the same model, so that the operating requirements on the first butterfly valve 5, the second butterfly valve 8, the third butterfly valve 9 and the fourth butterfly valve 11 are consistent, and the control and the adjustment are facilitated; first low pressure jar 2 and second low pressure jar 3 are the low pressure turbine cylinder of the same model to guarantee that first low pressure jar 2 and second low pressure jar 3 have the same regulation result under the same regulation circumstances, thereby be convenient for control first low pressure jar 2 and second low pressure jar 3.
Under the pure condensation condition: the first butterfly valve 5, the second butterfly valve 8, and the third butterfly valve 9 are kept in a fully open state, and the fourth butterfly valve 11 is kept in a fully closed state.
The working principle of the embodiment is as follows: the first butterfly valve 5, the second butterfly valve 8 and the third butterfly valve 9 are fully opened, the fourth butterfly valve 11 is fully closed, so that the heat supply load of the unit is zero, and the generating power is ensured by adjusting the amount of the boiler fuel and the steam inlet amount of the steam turbine by coordinating an external control system.
Example 2:
referring to fig. 2, a large double low pressure cylinder steam turbine includes an intermediate pressure cylinder 1, a first low pressure cylinder 2 and a second low pressure cylinder 3, it is characterized in that the intermediate pressure cylinder 1 is communicated with an intermediate pressure steam pipe 4, the intermediate pressure steam pipe 4 is communicated with a first butterfly valve 5, the end part of the middle pressure steam pipe 4 is respectively communicated with a first low pressure steam pipe 6 and a second low pressure steam pipe 7, a second butterfly valve 8 is communicated and arranged on the first low-pressure steam pipe 6, a third butterfly valve 9 is communicated and arranged on the second low-pressure steam pipe 7, the first low-pressure steam pipe 6 is communicated with the first low-pressure cylinder 2, the second low-pressure steam pipe 7 is communicated with the second low-pressure cylinder 3, the middle pressure steam pipe 4 is communicated with a heat supply steam pipe 10, the heat supply steam pipe 10 is positioned at the front side of the first butterfly valve 5, a fourth butterfly valve 11 is communicated with the heat supply steam pipe 10, and a heating pipe 12 is communicated with the fourth butterfly valve 11; the first butterfly valve 5, the second butterfly valve 8, the third butterfly valve 9 and the fourth butterfly valve 11 are all manual butterfly valves with the same model, so that the operating requirements on the first butterfly valve 5, the second butterfly valve 8, the third butterfly valve 9 and the fourth butterfly valve 11 are consistent, and the control and the adjustment are facilitated; first low pressure jar 2 and second low pressure jar 3 are the low pressure turbine cylinder of the same model to guarantee that first low pressure jar 2 and second low pressure jar 3 have the same regulation result under the same regulation circumstances, thereby be convenient for control first low pressure jar 2 and second low pressure jar 3.
Under normal heating conditions: on the basis of embodiment 1, the second butterfly valve 8 and the third butterfly valve 9 are kept in a fully open state, the opening degree of the first butterfly valve 5 is gradually reduced, the heating pipe 12 is communicated with the external heat supply network, and then the opening degree of the fourth butterfly valve 11 is gradually increased to enable the fourth butterfly valve 11 to be in a fully open state, so that the exhaust steam pressure of the intermediate pressure cylinder 1 and the intake steam pressure of the first low pressure cylinder 2 and the second low pressure cylinder 3 are controlled within a normal range.
The working principle of the embodiment is as follows: the second butterfly valve 8 and the third butterfly valve 9 are fully opened, the opening degree of the first butterfly valve 5 is reduced, the fourth butterfly valve 11 is fully opened, the heat supply load of the unit can be gradually increased until the exhaust pressure of the intermediate pressure cylinder 1 or the inlet pressure of the first low pressure cylinder 2 and the second low pressure cylinder 3 reaches the limit value, and therefore the normal heat supply working condition is achieved. And the amount of the boiler fuel and the steam inlet amount of the steam turbine are still adjusted through an external coordination control system to ensure the power generation power.
Example 3:
referring to fig. 2, a large double low pressure cylinder steam turbine includes an intermediate pressure cylinder 1, a first low pressure cylinder 2 and a second low pressure cylinder 3, it is characterized in that the intermediate pressure cylinder 1 is communicated with an intermediate pressure steam pipe 4, the intermediate pressure steam pipe 4 is communicated with a first butterfly valve 5, the end part of the middle pressure steam pipe 4 is respectively communicated with a first low pressure steam pipe 6 and a second low pressure steam pipe 7, a second butterfly valve 8 is communicated and arranged on the first low-pressure steam pipe 6, a third butterfly valve 9 is communicated and arranged on the second low-pressure steam pipe 7, the first low-pressure steam pipe 6 is communicated with the first low-pressure cylinder 2, the second low-pressure steam pipe 7 is communicated with the second low-pressure cylinder 3, the middle pressure steam pipe 4 is communicated with a heat supply steam pipe 10, the heat supply steam pipe 10 is positioned at the front side of the first butterfly valve 5, a fourth butterfly valve 11 is communicated with the heat supply steam pipe 10, and a heating pipe 12 is communicated with the fourth butterfly valve 11; the first butterfly valve 5, the second butterfly valve 8, the third butterfly valve 9 and the fourth butterfly valve 11 are all manual butterfly valves with the same model, so that the operating requirements on the first butterfly valve 5, the second butterfly valve 8, the third butterfly valve 9 and the fourth butterfly valve 11 are consistent, and the control and the adjustment are facilitated; first low pressure jar 2 and second low pressure jar 3 are the low pressure turbine cylinder of the same model to guarantee that first low pressure jar 2 and second low pressure jar 3 have the same regulation result under the same regulation circumstances, thereby be convenient for control first low pressure jar 2 and second low pressure jar 3.
Under the working condition of single-cylinder heat supply: in addition to embodiment 2, the third butterfly valve 9 is kept in a fully open state, and the opening degree of the second butterfly valve 8 is gradually reduced to control the exhaust pressure of the intermediate pressure cylinder 1 and the intake pressure of the first low pressure cylinder 2 within normal ranges.
The working principle of the embodiment is as follows: when the heat supply load is increased, the third butterfly valve 9 is kept fully opened, the opening degree of the second butterfly valve 8 is reduced, the heat supply load of the unit is gradually increased until the exhaust steam pressure of the intermediate pressure cylinder 1 or the inlet steam pressure of the first low pressure cylinder 2 reaches a limit value, so that the single-cylinder heat supply working condition is achieved, and the boiler fuel quantity and the steam turbine inlet steam quantity are still adjusted through the external coordination control system to ensure the power generation.
Example 4:
referring to fig. 2, a large double low pressure cylinder steam turbine includes an intermediate pressure cylinder 1, a first low pressure cylinder 2 and a second low pressure cylinder 3, it is characterized in that the intermediate pressure cylinder 1 is communicated with an intermediate pressure steam pipe 4, the intermediate pressure steam pipe 4 is communicated with a first butterfly valve 5, the end part of the middle pressure steam pipe 4 is respectively communicated with a first low pressure steam pipe 6 and a second low pressure steam pipe 7, a second butterfly valve 8 is communicated and arranged on the first low-pressure steam pipe 6, a third butterfly valve 9 is communicated and arranged on the second low-pressure steam pipe 7, the first low-pressure steam pipe 6 is communicated with the first low-pressure cylinder 2, the second low-pressure steam pipe 7 is communicated with the second low-pressure cylinder 3, the middle pressure steam pipe 4 is communicated with a heat supply steam pipe 10, the heat supply steam pipe 10 is positioned at the front side of the first butterfly valve 5, a fourth butterfly valve 11 is communicated with the heat supply steam pipe 10, and a heating pipe 12 is communicated with the fourth butterfly valve 11; the first butterfly valve 5, the second butterfly valve 8, the third butterfly valve 9 and the fourth butterfly valve 11 are all manual butterfly valves with the same model, so that the operating requirements on the first butterfly valve 5, the second butterfly valve 8, the third butterfly valve 9 and the fourth butterfly valve 11 are consistent, and the control and the adjustment are facilitated; first low pressure jar 2 and second low pressure jar 3 are the low pressure turbine cylinder of the same model to guarantee that first low pressure jar 2 and second low pressure jar 3 have the same regulation result under the same regulation circumstances, thereby be convenient for control first low pressure jar 2 and second low pressure jar 3.
Under the working condition of cutting double cylinders for heat supply: on the basis of embodiment 3, the exhaust pressure of the intermediate pressure cylinder 1 and the intake pressure of the second low pressure cylinder 3 are controlled within the normal range by gradually reducing the opening degree of the third butterfly valve 9.
The working principle of the embodiment is as follows: when the heat supply load continues to increase, the opening degree of the third butterfly valve 9 is reduced, so that the heat supply load of the unit is gradually increased until the exhaust steam pressure of the intermediate pressure cylinder 1 or the inlet steam pressure of the second low pressure cylinder 3 reaches a limit value, and therefore the double-cylinder heat supply working condition is achieved, and the power generation power is still ensured by adjusting the boiler fuel quantity and the steam inlet quantity of the steam turbine through the external coordination control system.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (3)
1. A large-scale steam turbine with double low-pressure cylinders comprises a medium-pressure cylinder (1), a first low-pressure cylinder (2) and a second low-pressure cylinder (3), and is characterized in that the medium-pressure cylinder (1) is communicated with a medium-pressure steam pipe (4), the medium-pressure steam pipe (4) is communicated with a first butterfly valve (5), the end parts of the medium-pressure steam pipe (4) are respectively communicated with a first low-pressure steam pipe (6) and a second low-pressure steam pipe (7), the first low-pressure steam pipe (6) is communicated with a second butterfly valve (8), the second low-pressure steam pipe (7) is communicated with a third butterfly valve (9), the first low-pressure steam pipe (6) is communicated with the first low-pressure cylinder (2), the second low-pressure steam pipe (7) is communicated with the second low-pressure cylinder (3), the medium-pressure steam pipe (4) is communicated with a heat supply pipe (10), and the heat supply pipe (10) is positioned on the front side of the first butterfly valve (5), the heating steam pipe (10) is communicated with a fourth butterfly valve (11), and the fourth butterfly valve (11) is communicated with a heating pipe (12).
2. A large double low pressure cylinder steam turbine according to claim 1, wherein: the first butterfly valve (5), the second butterfly valve (8), the third butterfly valve (9) and the fourth butterfly valve (11) are all manual butterfly valves of the same type.
3. A large double low pressure cylinder steam turbine according to claim 1, wherein: the first low-pressure cylinder (2) and the second low-pressure cylinder (3) are both low-pressure turbine cylinders of the same type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020681993.4U CN211900705U (en) | 2020-04-29 | 2020-04-29 | Large-scale double-low pressure cylinder steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020681993.4U CN211900705U (en) | 2020-04-29 | 2020-04-29 | Large-scale double-low pressure cylinder steam turbine |
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| CN211900705U true CN211900705U (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020681993.4U Expired - Fee Related CN211900705U (en) | 2020-04-29 | 2020-04-29 | Large-scale double-low pressure cylinder steam turbine |
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| CN (1) | CN211900705U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432219A (en) * | 2020-11-20 | 2021-03-02 | 西安西热节能技术有限公司 | Double-cold-source efficient heating system suitable for large four-exhaust steam turbine unit |
| CN113864848A (en) * | 2021-06-16 | 2021-12-31 | 暨南大学 | Full-working-condition efficient heating system and method for cogeneration unit |
-
2020
- 2020-04-29 CN CN202020681993.4U patent/CN211900705U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432219A (en) * | 2020-11-20 | 2021-03-02 | 西安西热节能技术有限公司 | Double-cold-source efficient heating system suitable for large four-exhaust steam turbine unit |
| CN113864848A (en) * | 2021-06-16 | 2021-12-31 | 暨南大学 | Full-working-condition efficient heating system and method for cogeneration unit |
| CN113864848B (en) * | 2021-06-16 | 2023-11-21 | 暨南大学 | Full-working-condition efficient heat supply system and method for cogeneration unit |
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| GR01 | Patent grant | ||
| 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: 20201110 Termination date: 20210429 |