CN110671158A - High-pressure cylinder air pre-warming and quick-cooling system and adjusting method thereof - Google Patents
High-pressure cylinder air pre-warming and quick-cooling system and adjusting method thereof Download PDFInfo
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- CN110671158A CN110671158A CN201910873754.0A CN201910873754A CN110671158A CN 110671158 A CN110671158 A CN 110671158A CN 201910873754 A CN201910873754 A CN 201910873754A CN 110671158 A CN110671158 A CN 110671158A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/10—Heating, e.g. warming-up before starting
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Abstract
The invention discloses a high-pressure cylinder air pre-warming quick-cooling system and an adjusting method thereof in the field of thermal power generation, wherein the system comprises a steam turbine high-pressure cylinder, a pre-warming quick-cooling device, a high-pressure cylinder positive-warming quick-cooling steam inlet valve, a high-pressure main steam valve, a high-exhaust check valve, a high-pressure main steam valve rear drain valve, a high-exhaust check valve front drain valve, a high-pressure cylinder inverse-warming quick-cooling steam inlet valve, a compressed air steam inlet temperature measuring point, a high-pressure cylinder inner metal wall temperature measuring point and a temperature control system connected with the high-pressure cylinder inner metal wall temperature measuring point; the temperature of the compressed air entering the air cylinder is controlled and adjusted according to the temperature of the metal wall of the steam turbine required by the unit, so that pre-warming and rapid cooling of the high-pressure cylinder are realized, and the device has the characteristics of flexibility and controllability.
Description
Technical Field
The invention relates to the technical field of thermal power generation, in particular to a high-pressure cylinder air pre-heating and quick-cooling system and an adjusting method thereof.
Background
In recent years, novel energy technologies such as photovoltaic power generation and wind power generation are continuously and rapidly developed, and the traditional thermal power generating unit faces severe examination. The development of flexibility transformation as early as possible in a thermal power plant is a great trend, and the participation of a unit in deep peak regulation can not only obtain considerable peak regulation subsidy income, but also encourage the further development of new energy technology.
As such, the more capable a thermal power plant has deep peaking, the more profitable it can take over from. Particularly, in the domestic peak shaving units, frequent starting and stopping of the units are often faced, and how to make the frequently started and stopped units safer, more efficient and more energy-saving.
Based on the above, the invention designs the high-pressure cylinder air pre-heating quick-cooling system and the adjusting method thereof, the high-pressure cylinder thermal stress damage can be effectively reduced through reasonable pre-heating of the high-pressure cylinder, the rotor temperature is above the brittle temperature, the expansion difference in the starting process of the unit can be effectively controlled within a normal range, the unit is changed from the original cold-state starting to the temperature-state starting through the compressed air pre-heating device, the starting time is shortened, the starting efficiency of the unit is improved, and meanwhile, the aim of quickly adjusting the peak is achieved by corresponding national calls.
And when the unit needs to be shut down for maintenance, the device can provide quick cooling for the unit for saving the manpower and material resources brought by time, greatly shorten the time occupied by the shutdown cooling of the unit, save the time cost and improve the availability ratio of the generator set.
Disclosure of Invention
The invention aims to provide a high-pressure cylinder air pre-warming and quick-cooling system and an adjusting method thereof, aiming at some domestic peak regulation units, the high-pressure cylinder air pre-warming and quick-cooling system can be started quickly and stably, the time required by starting the machine is reduced, and the aim of quickly regulating peaks is fulfilled; the compressed air is heated to the temperature matched with the temperature of the cylinder, the compressed air is introduced into a high-pressure cylinder of the steam turbine, and the temperature of the cylinder is raised or lowered by utilizing the temperature difference between the heated compressed air and the cylinder wall, so that the aims of quick pre-warming and quick cooling are fulfilled; the temperature of the compressed air entering the air cylinder is controlled and adjusted according to the temperature of the metal wall of the steam turbine required by the unit, so that pre-warming and rapid cooling of the high-pressure cylinder are realized, and the device has the characteristics of flexibility and controllability.
In order to achieve the purpose, the invention provides the following technical scheme: the high-pressure cylinder air pre-warming and quick-cooling system comprises a main steam pipeline connected with an inlet of a high-pressure cylinder of a steam turbine, a high-pressure main steam valve arranged on the main steam pipeline, a reheating cold section steam pipeline connected with an outlet of the high-pressure cylinder of the steam turbine, a high-discharge check valve arranged on the reheating cold section steam pipeline, a pre-warming and quick-cooling device, a forward-warming quick-cooling subsystem and a backward-warming quick-cooling subsystem connected between the high-pressure cylinder of the steam turbine and the pre-warming quick-cooling device, a compressed air inlet temperature measuring point is arranged at an outlet of the pre-warming quick-cooling device, a metal wall temperature measuring point in the high-pressure cylinder is arranged on the inner wall of the high-pressure cylinder of the steam turbine, and the compressed air inlet temperature measuring point and the metal wall temperature.
Preferably, just warm fast cold subsystem includes the trap behind warm fast cold admission valve of high-pressure cylinder and the high-pressure main steam valve, behind the high-pressure main steam valve the trap pass through the pipe connection in on the pipeline between high-pressure main steam valve and the steam turbine high-pressure cylinder, the export of warm fast cold charge in advance links to each other with the warm fast cold admission valve of high-pressure cylinder through the pipeline, the high-pressure cylinder just warms fast cold admission valve and passes through the pipe connection between the trap behind high-pressure main steam valve and the high-pressure main steam valve.
Preferably, the fast cold subsystem of falling warm includes that the high pressure cylinder falls warm fast cold admission valve and the high trap before the check valve of arranging, the high trap passes through the pipe connection before arranging the check valve in on the pipeline between check valve and the steam turbine high-pressure cylinder is arranged to the high pressure, the export of the fast cold device of warming in advance links to each other with the high pressure cylinder fast cold admission valve of falling warm through the pipeline, the high pressure cylinder falls warm fast cold admission valve of warm through the pipe connection in the steam turbine high-pressure cylinder and high before arranging the check valve between the trap.
Preferably, the method for adjusting the high-pressure cylinder air pre-warming quick-cooling system further comprises the following steps:
when the system needs to warm and cool the high-pressure cylinder positively, the pre-warming and quick-cooling device heats the compressed air to a certain temperature value, when a temperature measuring point of the inlet steam of the compressed air is matched with a temperature measuring point of the metal wall in the high-pressure cylinder, the high-pressure main steam valve and the high-exhaust check valve are closed, the positive-warming and quick-cooling steam inlet valve of the high-pressure cylinder is opened, the compressed air enters the high-pressure cylinder of the steam turbine, and when the temperature measuring point of the metal wall in the high-pressure cylinder detects that the required temperature is reached, the positive-warming and quick-cooling steam inlet valve of the high-pressure cylinder is closed;
when the system needs the back-warming and fast-cooling of the high-pressure cylinder, the pre-warming and fast-cooling device heats the compressed air to a certain temperature value, when a temperature measuring point of the inlet steam of the compressed air is matched with a temperature measuring point of a metal wall in the high-pressure cylinder, the high-pressure main steam valve and the high-exhaust check valve are closed, the back-warming and fast-cooling steam inlet valve of the high-pressure cylinder is opened, the compressed air enters the high-pressure cylinder of the steam turbine, when the temperature measuring point of the metal wall in the high-pressure cylinder detects that the required temperature is reached, the back-warming and fast-cooling steam inlet valve of the high-pressure.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention changes the original single quick cooling device into the pre-warming quick cooling device, has one set of equipment with two functions, saves the cost and improves the utilization rate of the equipment;
2. the pre-warming mode is also divided into two modes, one mode is a positive warming mode, the other mode is a reverse warming mode, and different modes and methods can be adopted according to different machine types;
3. the boiler is not required to be pre-heated by steam, the adopted mode is to heat the compressed air, and the steam turbine body reaches certain parameters before the boiler is not ignited, so that the starting time of a boiler induced draft fan, a blower, a primary air fan and a coal pulverizer is delayed, the starting time is shortened, and the energy consumption loss is reduced quite obviously.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the structure of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a high-pressure cylinder of the steam turbine; 2. a pre-warming and quick-cooling device; 3. a positive-heating and quick-cooling steam inlet valve of a high-pressure cylinder; 4. a high pressure main steam valve; 5. a high-discharge check valve; 6. a high-pressure main steam valve and a rear drain valve; 7. a front drain valve of the high-discharge check valve; 8. a high-pressure cylinder reverse-heating fast-cooling steam inlet valve; 9. measuring a point for the inlet steam temperature of the compressed air; 10. and measuring the temperature of the metal wall in the high-pressure cylinder.
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.
Referring to fig. 1, the present invention provides a technical solution: the utility model provides a high-pressure cylinder air warms up fast cold system in advance, include the main steam pipeline that is connected with the 1 import of steam turbine high pressure cylinder and install high-pressure main steam valve 4 on main steam pipeline and install the reheat cold section steam pipeline that is connected with the 1 export of steam turbine high pressure cylinder and install high exhaust check valve 5 on reheat cold section steam pipeline, when compressed air gets into high pressure cylinder 1, high-pressure main steam valve 4 and high exhaust check valve 5 should guarantee that the valve closes, guarantee that compressed air does not leak away through high-pressure main steam valve 4 and high exhaust check valve 5. The system is characterized by further comprising a pre-warming quick-cooling device 2, and a positive-warming quick-cooling subsystem and a back-warming quick-cooling subsystem which are connected between the steam turbine high-pressure cylinder 1 and the pre-warming quick-cooling device 2, wherein a compressed air steam inlet temperature measuring point 9 is installed at an outlet of the pre-warming quick-cooling device 2, a metal wall temperature measuring point 10 in the high-pressure cylinder is installed on the inner wall of the steam turbine high-pressure cylinder 1, the compressed air steam inlet temperature measuring point 9 and the metal wall temperature measuring point 10 in the high-pressure cylinder are connected with an external temperature control system, and the compressed air steam inlet temperature measuring point 9 and the metal wall temperature measuring point 10 in the high-pressure cylinder are parameter bases for monitoring compressed air entering.
As an embodiment of the present invention: just warm fast cold subsystem includes drain valve 6 behind warm fast cold admission valve 3 of high-pressure cylinder and the high pressure main steam valve, drain valve 6 behind the high pressure main steam valve through the pipe connection in on the pipeline between high pressure main steam valve 4 and the steam turbine high pressure cylinder 1, the export of warming fast cold charge device 2 in advance links to each other with the high-pressure cylinder just warm fast cold admission valve 3 through the pipeline, the high pressure cylinder just warms fast cold admission valve 3 through the pipe connection in high pressure main steam valve 4 and high pressure main steam valve between drain valve 6 behind, and the compressed air that the export of warming fast cold charge device 2 in advance can get into high-pressure cylinder 1 through high-pressure cylinder warms fast cold admission valve 3 in advance, realizes that compressed air is just warm the route that gets into high-pressure cylinder 1, and drain valve 6 is the compressed air route that the gaseous outflow after heating high-pressure cylinder 1 behind the high pressure main steam valve.
As another embodiment of the present invention: the fast cold subsystem of falling warm includes that the high pressure cylinder falls warm fast cold admission valve 8 and high drainage trap 7 before the check valve, the high drainage trap 7 before the check valve of falling warm connects in on the pipeline between 5 and the steam turbine high pressure cylinder 1 of high pressure through the pipeline, the export of the fast cold charge valve 2 of pre-warming links to each other with high pressure cylinder fall warm fast cold admission valve 8 through the pipeline, the high pressure cylinder falls warm fast cold admission valve 8 of falling warm through the pipeline connection in the steam turbine high pressure cylinder 1 and high drainage trap before between 7, the compressed air of the fast cold charge valve 2 export outflow of pre-warming can fall warm fast cold admission valve 8 through high pressure cylinder and get into high pressure cylinder 1, realizes that compressed air falls warm route that gets into high pressure cylinder 1, and the high drainage trap 7 is the compressed air through the gaseous route of flowing out after heating high pressure cylinder 1 before the check valve of high drainage.
The invention also comprises an adjusting method of the high-pressure cylinder air pre-warming quick-cooling system, which specifically comprises the following steps:
when the system needs the positive heating or quick cooling of the high-pressure cylinder, the pre-heating quick cooling device 2 can heat the compressed air to a certain temperature, and when the compressed air steam inlet temperature measuring point 9 is matched with the metal wall temperature measuring point 10 in the high-pressure cylinder. And closing the high-pressure main steam valve 4 and the high-discharge check valve 5 to ensure that the compressed air does not leak through the high-pressure main steam valve 4 and the high-discharge check valve 5. The method comprises the steps that a high-pressure cylinder positive-warm-quick-cold air inlet valve 3 is opened to compress air to enter a high-pressure cylinder 1 of the steam turbine, the temperature of the cylinder is raised or lowered by utilizing the temperature difference between heated compressed air and the cylinder wall, the high-pressure cylinder positive-warm-quick-cold air inlet valve 3 is closed after a metal wall temperature measuring point 10 in the high-pressure cylinder reaches the required temperature, and the compressed air after utilization is exhausted from a drain valve 7 in front of a high-exhaust check valve.
When the system needs the back warming or fast cooling of the high pressure cylinder, the pre-warming fast cooling device 2 can heat the compressed air to a certain temperature, and when the compressed air steam inlet temperature measuring point 9 is matched with the metal wall temperature measuring point 10 in the high pressure cylinder. And closing the high-pressure main steam valve 4 and the high-discharge check valve 5 to ensure that the compressed air does not leak through the high-pressure main steam valve 4 and the high-discharge check valve 5. The high-pressure cylinder back-warming-quick-cooling air inlet valve 8 is opened to compress air to enter the high-pressure cylinder 1 of the steam turbine, the temperature of the cylinder is raised or lowered by utilizing the temperature difference between the heated compressed air and the cylinder wall, the back-warming-quick-cooling air inlet valve 8 of the high-pressure cylinder is closed after a metal wall temperature measuring point 10 in the high-pressure cylinder reaches the required temperature, and the compressed air after being utilized is exhausted from a drain valve 6 behind a high-pressure main steam valve.
The devices and temperature control detection between the compressed air steam inlet temperature measuring point 9 and the metal wall temperature measuring point 10 in the high-pressure cylinder and the external temperature control system belong to common standard parts or parts known by the technical personnel in the field, and the structure and the principle of the device can be known by the technical manual or the conventional experimental method.
After the system and the method are adopted, the originally single quick cooling device can be changed into the pre-warming quick cooling device, two functions are provided for one set of equipment, the cost is saved, and the utilization rate of the equipment is improved. Two simultaneous pre-heating modes are also divided into two modes, one mode is a positive heating mode, the other mode is a reverse heating mode, and different modes and methods can be adopted according to different machine types. Thirdly, the steam is not needed to be used for pre-warming, the adopted mode is to heat the compressed air, the steam turbine body reaches certain parameters before the boiler is not ignited, so that the starting time of a boiler induced draft fan, a blower, a primary air fan and a coal pulverizer is delayed, and if the boiler is started by adopting a pre-warming technology every time, the boiler equipment is delayed for 3 h. The induced draft fan is started to save 4000kW of power consumption, the forced draft fan is 800kW, the primary air fan is 1500kW, the coal mill is 400kW, the total electric energy is saved 6700 multiplied by 3 which is 20100kW, the starting time is shortened, and the energy consumption loss is reduced.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (4)
1. The utility model provides a high-pressure cylinder air warms up fast cold system in advance which characterized in that: the device comprises a main steam pipeline connected with an inlet of a turbine high-pressure cylinder (1), a high-pressure main steam valve (4) installed on the main steam pipeline, a reheat cooling section steam pipeline connected with an outlet of the turbine high-pressure cylinder (1), a high-exhaust check valve (5) installed on the reheat cooling section steam pipeline, a pre-warming quick-cooling device (2), a forward-warming quick-cooling subsystem and a back-warming quick-cooling subsystem connected between the turbine high-pressure cylinder (1) and the pre-warming quick-cooling device (2), a compressed air inlet steam temperature measuring point (9) is installed at an outlet of the pre-warming quick-cooling device (2), a metal wall temperature measuring point (10) in the high-pressure cylinder is installed on the inner wall of the turbine high-pressure cylinder (1), and the compressed air inlet steam temperature measuring point (9) and the metal wall temperature measuring point (10) in the high-pressure cylinder are connected with an external temperature control.
2. The high-pressure cylinder air pre-warming and quick-cooling system as claimed in claim 1, wherein: just warm fast cold subsystem includes drain valve (6) behind warm fast cold admission valve (3) of high-pressure jar and the high pressure main steam valve, behind the high pressure main steam valve drain valve (6) through the pipe connection in on the pipeline between high pressure main steam valve (4) and the steam turbine high-pressure jar (1), the export of warm fast cold charge in advance device (2) links to each other through pipeline and high-pressure jar warm fast cold admission valve (3), the high-pressure jar is just warm fast cold admission valve (3) through pipe connection in high pressure main steam valve (4) and high pressure main steam valve between drain valve (6).
3. The high-pressure cylinder air pre-warming and quick-cooling system as claimed in claim 1, wherein: the fast cold subsystem of falling warm includes that the high pressure cylinder falls warm fast cold admission valve (8) and high drainage trap (7) before the check valve, high drainage trap (7) before the check valve through the pipe connection in on the pipeline between check valve (5) and the steam turbine high pressure cylinder (1) is arranged to the high drainage trap, the export of the fast cold charge of warming in advance device (2) links to each other through pipeline and high pressure cylinder fall warm fast cold admission valve (8), the high pressure cylinder falls warm fast cold admission valve (8) through pipe connection in steam turbine high pressure cylinder (1) and high drainage trap before between trap (7).
4. A high-pressure cylinder air pre-warming quick-cooling system according to any one of claims 1 to 3, characterized in that: the method for adjusting the high-pressure cylinder air pre-warming quick-cooling system comprises the following steps:
when the system needs the positive heating and the quick cooling of the high-pressure cylinder, the pre-heating and quick cooling device (2) heats the compressed air to a certain temperature value, when a compressed air steam inlet temperature measuring point (9) is matched with a metal wall temperature measuring point (10) in the high-pressure cylinder, the high-pressure main steam valve (4) and the high-exhaust check valve (5) are closed, the positive heating and quick cooling steam inlet valve (3) of the high-pressure cylinder is opened, the compressed air enters the high-pressure cylinder (1) of the steam turbine, and when the metal wall temperature measuring point (10) in the high-pressure cylinder detects that the required temperature is reached, the positive heating and quick cooling steam inlet valve (3) of the high-pressure cylinder is closed, and the front drain valve (7;
when the system needs the back warming and fast cooling of the high-pressure cylinder, the pre-warming and fast cooling device (2) heats the compressed air to a certain temperature value, when a compressed air steam inlet temperature measuring point (9) is matched with a metal wall temperature measuring point (10) in the high-pressure cylinder, the high-pressure main steam valve (4) and the high-exhaust check valve (5) are closed, the back warming and fast cooling steam inlet valve (8) of the high-pressure cylinder is opened, the compressed air enters the high-pressure cylinder (1) of the steam turbine, and when the metal wall temperature measuring point (10) in the high-pressure cylinder detects that the required temperature is reached, the back warming and fast cooling steam inlet valve (8) of the high-pressure cylinder is closed, and the back drain valve (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910873754.0A CN110671158A (en) | 2019-09-17 | 2019-09-17 | High-pressure cylinder air pre-warming and quick-cooling system and adjusting method thereof |
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| CN201910873754.0A CN110671158A (en) | 2019-09-17 | 2019-09-17 | High-pressure cylinder air pre-warming and quick-cooling system and adjusting method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412552A (en) * | 2020-10-15 | 2021-02-26 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Rapid air pre-warming starting system of steam turbine set |
| CN113623026A (en) * | 2021-09-07 | 2021-11-09 | 济南奔腾时代电力科技有限公司 | Steam turbine high-pressure cylinder warming and cylinder switching control optimization method |
-
2019
- 2019-09-17 CN CN201910873754.0A patent/CN110671158A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412552A (en) * | 2020-10-15 | 2021-02-26 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Rapid air pre-warming starting system of steam turbine set |
| CN113623026A (en) * | 2021-09-07 | 2021-11-09 | 济南奔腾时代电力科技有限公司 | Steam turbine high-pressure cylinder warming and cylinder switching control optimization method |
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