CN215333020U - Steam inlet system of double-pressure steam turbine for natural gas waste heat power generation - Google Patents
Steam inlet system of double-pressure steam turbine for natural gas waste heat power generation Download PDFInfo
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- CN215333020U CN215333020U CN202120806827.7U CN202120806827U CN215333020U CN 215333020 U CN215333020 U CN 215333020U CN 202120806827 U CN202120806827 U CN 202120806827U CN 215333020 U CN215333020 U CN 215333020U
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Abstract
The utility model discloses a steam inlet system of a double-pressure steam turbine for natural gas waste heat power generation, which comprises a waste heat boiler, wherein a high-pressure steam outlet of the waste heat boiler is connected with a steam turbine steam inlet main throttle valve of a steam turbine through a high-pressure steam pipeline, and a high-pressure steam flow measuring device, a high-pressure steam pressure measuring device and a high-pressure steam temperature measuring device are sequentially installed on the high-pressure steam pipeline at intervals; the low-pressure steam outlet of the waste heat boiler is connected with a steam turbine steam supplementing electric door of a steam turbine through a low-pressure steam pipeline, low-pressure steam flow measuring devices, low-pressure steam pressure measuring devices and low-pressure steam temperature measuring devices are sequentially installed on the low-pressure steam pipeline at intervals, and a steam turbine steam supplementing hydraulic quick-closing valve is installed on a low-pressure steam inlet pipeline between the steam turbine steam supplementing electric door and the steam turbine. The steam inlet system of the double-pressure steam turbine for natural gas waste heat power generation fully utilizes high-pressure steam and low-pressure steam generated by the waste heat boiler, improves the waste heat utilization rate and economic benefit, and has strong stability.
Description
Technical Field
The utility model relates to the technical field of waste heat power generation, in particular to a steam inlet system of a double-pressure steam turbine for natural gas waste heat power generation.
Background
A steam turbine, also called a steam turbine engine, is an external combustion rotary machine that can convert steam heat energy into mechanical work. After entering the steam turbine, the steam passes through a series of annularly configured nozzles and moving blades in sequence, and the heat energy of the steam is converted into mechanical energy for rotating a rotor of the steam turbine. Steam turbines are the main equipment of modern thermal power plants.
The conventional steam turbine steam inlet system is a single-pressure steam turbine steam inlet system, but when natural gas waste heat is used for power generation, the waste heat boiler can adopt a double-pressure steam system, and the single-pressure steam turbine steam inlet system is used, so that the utilization rate of waste heat is not high, and heat energy is wasted. Therefore, in order to fully utilize the heat of the exhaust-heat boiler and improve the utilization rate of the exhaust-heat, it is necessary to provide a steam inlet system of the dual-pressure steam turbine for natural gas exhaust-heat power generation to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the embodiment of the utility model is to provide a steam inlet system of a double-pressure steam turbine for natural gas waste heat power generation, aiming at the problems that the existing steam inlet systems of the steam turbines are single-pressure steam turbine steam inlet systems, the utilization rate of waste heat is low, and heat energy is wasted.
In order to solve the above technical problem, an embodiment of the present invention provides a steam intake system of a dual pressure turbine for natural gas cogeneration, including: the waste heat boiler is characterized in that a high-pressure steam outlet of the waste heat boiler is connected with a steam turbine steam inlet main valve of a steam turbine through a high-pressure steam pipeline, the high-pressure steam pipeline is sequentially provided with a high-pressure steam flow measuring device, a high-pressure steam pressure measuring device and a high-pressure steam temperature measuring device at intervals from one end of the waste heat boiler to one end of the steam turbine steam inlet main valve, the high-pressure steam pipeline between the high-pressure steam temperature measuring device and the steam turbine steam inlet main valve is communicated with a steam turbine body drainage pipeline through a high-pressure branch pipe, and the high-pressure branch pipe is provided with a high-pressure steam drainage electric door; the low-pressure steam outlet of the waste heat boiler is connected with a steam turbine steam supplementing electric door of a steam turbine through a low-pressure steam pipeline, a low-pressure steam flow measuring device, a low-pressure steam pressure measuring device and a low-pressure steam temperature measuring device are sequentially installed on the low-pressure steam pipeline from one end of the waste heat boiler to one end of the steam turbine steam supplementing electric door at intervals, and a steam turbine steam supplementing hydraulic quick closing valve is installed on a low-pressure steam inlet pipeline between the steam turbine steam supplementing electric door and the steam turbine.
Wherein, high pressure steam flow measuring device and low pressure steam flow measuring device are nozzle flowmeter.
Wherein, a high-pressure steam pipeline between the waste heat boiler and the high-pressure steam flow measuring device is communicated with the pressure equalizing box.
Wherein, a first stop valve is arranged on the high-pressure branch pipe between the high-pressure steam drain electric door and the high-pressure steam pipeline.
Wherein, the low pressure steam pipeline between low pressure steam pressure measuring device and the low pressure steam temperature measuring device is through first drain pipe and exhaust-heat boiler drain pipe intercommunication, installs first electronic stop valve on the first drain pipe.
Wherein, connect the gland seal pipeline through the low pressure branch pipe on the low pressure admission line between steam turbine steam supplementing hydraulic pressure fast valve and the steam turbine, through second drain line and exhaust-heat boiler drain line intercommunication on the low pressure admission line between steam turbine steam supplementing hydraulic pressure fast valve and the steam turbine, install the electronic stop valve of second on the second drain line, the second drain line is arranged outward through the branch pipe, installs the second stop valve on the branch pipe.
The embodiment of the utility model has the following beneficial effects: the steam inlet system of the double-pressure steam turbine for natural gas waste heat power generation fully utilizes high-pressure steam and low-pressure steam generated by the waste heat boiler, improves the waste heat utilization rate and economic benefit, and has strong stability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an inlet system of a dual-pressure turbine for natural gas cogeneration according to the present invention.
In the figure: the system comprises a high-pressure steam flow measuring device 1, a high-pressure steam pressure measuring device 2, a high-pressure steam temperature measuring device 3, a steam turbine steam inlet main valve 4, a high-pressure steam drain electric valve 5, a low-pressure steam flow measuring device 6, a low-pressure steam pressure measuring device 7, a low-pressure steam temperature measuring device 8, a steam turbine steam supplementing electric valve 9, a steam turbine steam supplementing hydraulic quick-closing valve 10, a waste heat boiler 11, a high-pressure steam pipeline 12, a steam turbine 13, a high-pressure branch pipe 14, a low-pressure steam pipeline 15, a low-pressure steam inlet pipeline 16, a pressure equalizing box 17, a first stop valve 18, a first drain pipeline 19, a first electric stop valve 20, a low-pressure branch pipe 21, a second drain pipeline 22, a second electric stop valve 23, a branch pipe 24 and a second stop valve 25.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The utility model provides a steam inlet system of a dual-pressure steam turbine for natural gas waste heat power generation, please refer to fig. 1, and fig. 1 is a schematic structural diagram of the steam inlet system of the dual-pressure steam turbine for natural gas waste heat power generation provided by the utility model.
The high-pressure steam outlet of the waste heat boiler 11 is connected with the steam turbine main steam inlet valve 4 of the steam turbine 13 through a high-pressure steam pipeline 12. The high-pressure steam pipeline 12 is sequentially provided with a high-pressure steam flow measuring device 1, a high-pressure steam pressure measuring device 2 and a high-pressure steam temperature measuring device 3 at intervals from one end of the waste heat boiler 11 to one end of the steam turbine steam inlet main valve 4. A high-pressure steam pipeline 12 between the high-pressure steam temperature measuring device 3 and the steam turbine steam inlet main valve 4 is communicated with a steam drain pipeline of a steam turbine 13 body through a high-pressure branch pipe 14, a high-pressure steam drain electric door 5 is installed on the high-pressure branch pipe 14, and a first stop valve 18 is arranged on the high-pressure branch pipe 14 between the high-pressure steam drain electric door 5 and the high-pressure steam pipeline 12. And a high-pressure steam pipeline 12 between the waste heat boiler 11 and the high-pressure steam flow measuring device 1 is communicated with a pressure equalizing box 17.
The low-pressure steam outlet of the waste heat boiler 11 is connected with a steam turbine steam supplementing electric door 9 of a steam turbine 13 through a low-pressure steam pipeline 15. The low-pressure steam pipeline 15 is sequentially provided with a low-pressure steam flow measuring device 6, a low-pressure steam pressure measuring device 7 and a low-pressure steam temperature measuring device 8 at intervals from one end of the waste heat boiler 11 to one end of the steam turbine steam supplementing electric door 9. The low-pressure steam pipeline 16 between the low-pressure steam pressure measuring device 7 and the low-pressure steam temperature measuring device 8 is communicated with a drain pipeline of the waste heat boiler through a first drain pipeline 19, and a first electric stop valve 20 is installed on the first drain pipeline 19. A steam turbine steam supplementing hydraulic quick closing valve 10 is arranged on a low-pressure steam inlet pipeline 16 between the steam turbine steam supplementing electric door 9 and a steam turbine 13. The low-pressure steam inlet pipeline 16 between the steam turbine steam supplementing hydraulic quick closing valve 10 and the steam turbine 13 is connected with a steam seal pipeline through a low-pressure branch pipe 21. The low-pressure steam inlet pipeline 16 between the steam turbine steam supplementing hydraulic quick-closing valve 10 and the steam turbine 13 is communicated with a waste heat boiler drain pipeline through a second drain pipeline 22, a second electric stop valve 23 is installed on the second drain pipeline 22, the second drain pipeline 22 is arranged outside through a branch pipe 24, and a second stop valve 25 is installed on the branch pipe 24.
Wherein, the high pressure steam flow measuring device 1 and the low pressure steam flow measuring device 6 are both nozzle flow meters.
The utility model discloses a steam inlet system of a double-pressure steam turbine for natural gas waste heat power generation, which comprises the following steps: the high-pressure steam that exhaust-heat boiler came flows through high-pressure steam flow measuring device, this measuring device can measure high-pressure steam flow, so that the operating personnel carries out corresponding operation according to the flow, high-pressure steam pressure measuring device can detect high-pressure steam's pressure, high-pressure steam temperature measuring device can detect high-pressure steam temperature, high-pressure operating personnel adjusts the switch of the hydrophobic electrically operated gate of high-pressure steam according to high-pressure steam temperature in the unit start-up process, control high-pressure steam pressure, open steam turbine admission main throttle after high-pressure steam temperature and pressure reach predetermined numerical value, the start-up of admission steam turbine, drive the generator operation after the steam turbine starts, convert the heat energy that exhaust-heat boiler produced high-pressure steam into the electric energy. The low pressure steam flow measuring device is used for measuring low pressure steam flow, supply the operation personnel to carry out corresponding operation according to the flow, low pressure steam pressure measuring device can detect the pressure of low pressure steam, low pressure steam temperature measuring device can detect low pressure steam temperature, when the unit reaches certain load after, operating personnel carries out corresponding operation according to low pressure steam temperature and pressure, open steam turbine mend vapour electrically operated gate and steam turbine mends vapour hydraulic pressure fast valve, low pressure steam gets into the steam turbine and does work, turn into the electric energy with the heat energy of high pressure steam and low pressure steam through turbo generator set.
When the unit normally operates, an operator takes corresponding operations by observing the flow rate, the temperature, the pressure, the flow rate, the temperature and the pressure of the high-pressure steam, so that the safe and stable operation of the unit is ensured. Under the abnormal emergency condition, the steam turbine protection device acts or an operator operates to quickly close the main throttle valve of the steam turbine and the steam turbine steam supplementing hydraulic quick closing valve, so that the safety shutdown is realized.
The steam inlet system of the double-pressure steam turbine for natural gas waste heat power generation fully utilizes high-pressure steam and low-pressure steam generated by the waste heat boiler, improves the waste heat utilization rate and economic benefit, and has strong stability.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. The utility model provides a steam admission system of two pressure steam turbines for natural gas cogeneration, includes: the waste heat boiler is characterized in that a high-pressure steam outlet of the waste heat boiler is connected with a steam turbine steam inlet main valve of a steam turbine through a high-pressure steam pipeline, the high-pressure steam pipeline is sequentially provided with a high-pressure steam flow measuring device, a high-pressure steam pressure measuring device and a high-pressure steam temperature measuring device at intervals from one end of the waste heat boiler to one end of the steam turbine steam inlet main valve, the high-pressure steam pipeline between the high-pressure steam temperature measuring device and the steam turbine steam inlet main valve is communicated with a steam turbine body drainage pipeline through a high-pressure branch pipe, and the high-pressure branch pipe is provided with a high-pressure steam drainage electric door; the low-pressure steam outlet of the waste heat boiler is connected with a steam turbine steam supplementing electric door of a steam turbine through a low-pressure steam pipeline, a low-pressure steam flow measuring device, a low-pressure steam pressure measuring device and a low-pressure steam temperature measuring device are sequentially installed on one end of the low-pressure steam pipeline from one end of the waste heat boiler to one end of the steam turbine steam supplementing electric door at intervals, and a steam turbine steam supplementing hydraulic quick-closing valve is installed on a low-pressure steam inlet pipeline between the steam turbine steam supplementing electric door and the steam turbine.
2. The steam inlet system of the dual pressure steam turbine for natural gas cogeneration according to claim 1, wherein the high pressure steam flow measuring device and the low pressure steam flow measuring device are both nozzle flow meters.
3. The steam inlet system of the dual pressure steam turbine for natural gas cogeneration according to claim 1, wherein the high pressure steam pipeline between the exhaust heat boiler and the high pressure steam flow measuring device is communicated with a pressure equalizing tank.
4. The steam inlet system of the dual pressure steam turbine for natural gas cogeneration according to claim 1, wherein a first stop valve is provided on the high-pressure branch pipe between the high-pressure steam trap electric door and the high-pressure steam pipeline.
5. The steam inlet system of the dual pressure steam turbine for natural gas waste heat power generation according to claim 1, wherein the low pressure steam pipeline between the low pressure steam pressure measuring device and the low pressure steam temperature measuring device is communicated with the waste heat boiler drain pipeline through a first drain pipeline, and a first electric stop valve is installed on the first drain pipeline.
6. The steam inlet system of the double-pressure steam turbine for natural gas waste heat power generation according to claim 1, wherein a steam seal pipeline is connected to the low-pressure steam inlet pipeline between the steam turbine steam supplementing hydraulic quick closing valve and the steam turbine through a low-pressure branch pipe, the low-pressure steam inlet pipeline between the steam turbine steam supplementing hydraulic quick closing valve and the steam turbine is communicated with the waste heat boiler drain pipeline through a second drain pipeline, a second electric stop valve is installed on the second drain pipeline, the second drain pipeline is arranged outside through a branch pipe, and a second stop valve is installed on the branch pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120806827.7U CN215333020U (en) | 2021-04-16 | 2021-04-16 | Steam inlet system of double-pressure steam turbine for natural gas waste heat power generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120806827.7U CN215333020U (en) | 2021-04-16 | 2021-04-16 | Steam inlet system of double-pressure steam turbine for natural gas waste heat power generation |
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| CN215333020U true CN215333020U (en) | 2021-12-28 |
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| CN202120806827.7U Active CN215333020U (en) | 2021-04-16 | 2021-04-16 | Steam inlet system of double-pressure steam turbine for natural gas waste heat power generation |
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| CN (1) | CN215333020U (en) |
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2021
- 2021-04-16 CN CN202120806827.7U patent/CN215333020U/en active Active
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