CN211144590U - Double-backpressure double-rotor interchange unit with combined operation of electric and steam feed pumps - Google Patents
Double-backpressure double-rotor interchange unit with combined operation of electric and steam feed pumps Download PDFInfo
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- CN211144590U CN211144590U CN201921267126.XU CN201921267126U CN211144590U CN 211144590 U CN211144590 U CN 211144590U CN 201921267126 U CN201921267126 U CN 201921267126U CN 211144590 U CN211144590 U CN 211144590U
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Abstract
The utility model discloses a double-backpressure double-rotor interchange unit with combined operation of an electric water feeding pump and a steam-driven water feeding pump, which is characterized by comprising a deaerator, a low-pressure heater, a condenser, a low-pressure cylinder, the steam-driven water feeding pump and the electric water feeding pump; the low-pressure cylinder, the condenser, the low-pressure heater and the deaerator are sequentially connected, and the deaerator is connected with the steam-driven water-feeding pump or the electric water-feeding pump. For the double-backpressure double-rotor interchange transformation unit adopting the steam-driven water feeding pump, the utility model is additionally provided with the electric water feeding pump meeting the operation requirement, and the operation mode of the electric water feeding pump is adopted during the high-backpressure heat supply operation period; during normal back pressure operation, the operation mode of the original steam feed water pump is adopted. The efficiency of the water feeding pump steam turbine can be kept not to be reduced without modifying the water feeding pump steam turbine and starting a cold and high pressure steam source.
Description
Technical Field
The utility model relates to a two backpressure birotors of electronic and steam feed pump combined operation exchange unit.
Background
The double-backpressure double-rotor interchange heat supply transformation aims at increasing the heat supply capacity of the unit. The double-backpressure double-rotor interchange means that a unit uses a high-backpressure low-pressure rotor with relatively reduced number of stages of moving and static blades during heating and heat supply, circulating water is adopted for direct heat supply, and a condenser has higher running backpressure; in the non-heating period, the low-pressure rotor which is originally designed and equipped is used and operates under normal back pressure. The 300MW grade unit generally sets up the drive feed pump steam turbine, consequently when carrying out the host computer transformation, the drive feed pump steam turbine also need join in marriage to carry out the high back pressure transformation to adapt to host computer condenser high back pressure operating mode. At present, the transformation scheme of a set of rotors is adopted for the driving water feeding pump turbine, namely, the driving water feeding pump turbine only uses one rotor to adapt to the operation of two working conditions of high back pressure and low back pressure, and the efficiency of the driving water feeding pump turbine cannot reach the best due to the fact that the design of the through-flow part needs to adapt to the two working conditions, and the performance of the driving water feeding pump turbine and the heat supply capacity of a host are influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art, and provides a double-backpressure double-rotor exchange unit with combined operation of an electric water feeding pump and a steam-driven water feeding pump, which is used for the double-backpressure double-rotor exchange reconstruction unit with the steam-driven water feeding pump, an electric water feeding pump meeting the operation requirement is additionally arranged, and the operation mode of the electric water feeding pump is adopted during the high-backpressure heat supply operation period; during normal back pressure operation, the operation mode of the original steam feed water pump is adopted.
The utility model provides a technical scheme that above-mentioned problem adopted is: a double-backpressure double-rotor interchange unit with combined operation of an electric feed pump and a steam feed pump is characterized by comprising a deaerator, a low-pressure heater, a condenser, a low-pressure cylinder, the steam feed pump and the electric feed pump; the low-pressure cylinder, the condenser, the low-pressure heater and the deaerator are sequentially connected, and the deaerator is connected with the steam-driven water-feeding pump or the electric water-feeding pump.
Further, during normal back pressure operation, the deaerator is connected with the steam feed water pump; during high back pressure operation, the deaerator is connected with an electric feed water pump.
During the high back pressure operation period, the electric water feeding pump is kept to operate, and the defect of insufficient output of the steam-driven water feeding pump can be overcome; during normal backpressure operation, keep the operation of steam feed pump, steam turbine drive feed pump group economic operation under former design operating mode, not only need not carry out feed pump steam turbine transformation like this, can also satisfy the unit operation needs.
Compared with the prior art, the utility model, have following advantage and effect: the efficiency of the water feeding pump steam turbine can be kept not to be reduced without modifying the water feeding pump steam turbine and starting a cold and high pressure steam source.
Drawings
Fig. 1 is a schematic structural diagram of a low pressure cylinder during normal back pressure operation in an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a low-pressure cylinder during high-back-pressure operation in the embodiment of the present invention.
In the figure: the device comprises a deaerator 1, a low-pressure heater 2, a condenser 3, a low-pressure cylinder 4, a steam-driven water-feeding pump 5 and an electric water-feeding pump 6.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Referring to fig. 1 to 2, the double-backpressure double-rotor interchange unit with combined operation of the electric and steam feed pumps in the embodiment includes a deaerator 1, a low-pressure heater 2, a condenser 3, a low-pressure cylinder 4, a steam feed pump 5 and an electric feed pump 6; the low-pressure cylinder 4, the condenser 3, the low-pressure heater 2 and the deaerator 1 are connected in sequence, and the deaerator 1 is connected with the steam-driven water-feeding pump 5 or the electric water-feeding pump 6.
During normal back pressure operation, the deaerator 1 is connected with a steam feed water pump 5; during high-back-pressure operation, the deaerator 1 is connected to an electric feed pump 6. During the high back pressure heat supply operation, the operation mode of the electric feed pump 6 is adopted; during normal back pressure operation, the operation mode of the original steam feed water pump 5 is adopted.
In addition, it should be noted that the above contents described in the present specification are only illustrations of the structure of the present invention. All equivalent changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions by those skilled in the art may be made to the described embodiments without departing from the scope of the invention as defined in the accompanying claims.
Claims (1)
1. A double-backpressure double-rotor interchange unit with combined operation of an electric feed pump and a steam feed pump is characterized by comprising a deaerator (1), a low-pressure heater (2), a condenser (3), a low-pressure cylinder (4), the steam feed pump (5) and the electric feed pump (6); the low-pressure cylinder (4), the condenser (3), the low-pressure heater (2) and the deaerator (1) are sequentially connected, and the deaerator (1) is connected with the steam-driven water feed pump (5) or the electric water feed pump (6); during normal back pressure operation, the deaerator (1) is connected with a steam-driven water feeding pump (5); during high back pressure operation, the deaerator (1) is connected with an electric feed water pump (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921267126.XU CN211144590U (en) | 2019-08-07 | 2019-08-07 | Double-backpressure double-rotor interchange unit with combined operation of electric and steam feed pumps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921267126.XU CN211144590U (en) | 2019-08-07 | 2019-08-07 | Double-backpressure double-rotor interchange unit with combined operation of electric and steam feed pumps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211144590U true CN211144590U (en) | 2020-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921267126.XU Active CN211144590U (en) | 2019-08-07 | 2019-08-07 | Double-backpressure double-rotor interchange unit with combined operation of electric and steam feed pumps |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211144590U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177691A (en) * | 2020-08-14 | 2021-01-05 | 华电电力科学研究院有限公司 | Double-backpressure double-rotor interchange type driving water feeding pump steam turbine operation method |
-
2019
- 2019-08-07 CN CN201921267126.XU patent/CN211144590U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177691A (en) * | 2020-08-14 | 2021-01-05 | 华电电力科学研究院有限公司 | Double-backpressure double-rotor interchange type driving water feeding pump steam turbine operation method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Dong Yang Inventor after: Wang Gang Inventor after: Wang Xuetong Inventor after: Xue Guiying Inventor after: Wang Xuedong Inventor after: Yan Yufeng Inventor after: Li Wanjun Inventor after: Zou Pinsong Inventor before: Dong Yang Inventor before: Wang Xuetong Inventor before: Wang Xuedong Inventor before: Yan Yufeng Inventor before: Li Wanjun |
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| CB03 | Change of inventor or designer information |