CN213450523U - Steam extraction reverse cooling device of steam turbine under zero-power working condition of low-pressure cylinder - Google Patents
Steam extraction reverse cooling device of steam turbine under zero-power working condition of low-pressure cylinder Download PDFInfo
- Publication number
- CN213450523U CN213450523U CN202022435070.3U CN202022435070U CN213450523U CN 213450523 U CN213450523 U CN 213450523U CN 202022435070 U CN202022435070 U CN 202022435070U CN 213450523 U CN213450523 U CN 213450523U
- Authority
- CN
- China
- Prior art keywords
- low pressure
- steam
- bypass valve
- low
- extraction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Control Of Turbines (AREA)
Abstract
The utility model belongs to the technical field of the steam turbine cooling, concretely relates to reverse cooling device of steam extraction of steam turbine for under low pressure jar zero power operating mode. The purpose is to solve the technical problems that the prior turboset realizes the long-time operation of the zero power of a low-pressure cylinder under the low vacuum in winter and ensures that the final-stage blade does not exceed the temperature. Technical scheme is including the low pressure jar, the extraction steam valve, the extraction steam pipe way, first low pressure heater, second low pressure heater, exhaust apparatus, the drain line, first bypass valve, the second bypass valve, catch water and bypass pipeline, the one end of first bypass valve links to each other with the extraction steam pipe way, the other end of first bypass valve links to each other with catch water's input, catch water's output passes through bypass pipeline and links to each other with the one end of second bypass valve, the other end of second bypass valve links to each other with the extraction steam pipe way, the utility model discloses a inferior blade temperature control of low pressure jar zero power long-time operation under the low vacuum in winter of steam turbine provides effective adjustment measure.
Description
Technical Field
The utility model belongs to the technical field of the steam turbine cooling, concretely relates to reverse cooling device of steam extraction of steam turbine for under low pressure jar zero power operating mode.
Background
In order to accelerate energy technology innovation, promote flexibility modification work of the coal-fired unit, excavate peak regulation potential of the coal-fired unit and further improve system peak regulation and new energy consumption capacity, in recent years, a plurality of thermal power units are subjected to low-pressure cylinder zero-power modification of a steam turbine, the successful application of the technology improves unit operation flexibility and relieves peak regulation pressure of a power grid.
When the steam turbine unit runs for a long time under the working condition of zero power of the low-pressure cylinder in low vacuum in winter, the vacuum requirement of the unit is high in order to prevent the last-stage and next-last-stage blades of the low-pressure rotor from being overheated, and when the steam turbine unit runs under high vacuum, the anti-freezing risk of the air-cooling condenser is greatly increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving current turboset and realizing the long-time operation of low pressure jar zero power under the low vacuum in winter, guarantee the not super-warm technical problem of low pressure jar last stage blade again simultaneously, provide a reverse cooling device is taken out to steam turbine that is used for under the low pressure jar zero power operating mode.
In order to solve the technical problem, the utility model discloses a technical scheme is:
a reverse cooling device of steam extraction of a steam turbine for a low-pressure cylinder under the zero-power working condition comprises the low-pressure cylinder, a steam extraction valve, a steam extraction pipeline, a first low-pressure heater, a second low-pressure heater, an exhaust device and a drain pipeline, wherein the output end of the low-pressure cylinder is connected with one input end of the first low-pressure heater through the steam extraction pipeline, the steam extraction valve is arranged on the steam extraction pipeline, the output end of the second low-pressure heater is connected with the other input end of the first low-pressure heater through the drain pipeline, the output end of the first low-pressure heater is connected with the input end of the exhaust device through the drain pipeline, the reverse cooling device further comprises a first bypass valve, a second bypass valve, a steam-water separation device and a bypass pipeline, one end of the first bypass valve is connected with the steam extraction pipeline between the steam extraction valve and the first low-pressure heater through the bypass pipeline, and the other end of the first bypass valve is connected with, the output end of the steam-water separation device is connected with one end of a second bypass valve through a bypass pipeline, and the other end of the second bypass valve is connected with a steam extraction pipeline between the low pressure cylinder and the steam extraction valve through the bypass pipeline.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses bypass pipeline, bypass valve and catch water that set up provide effective adjustment measure for the steam turbine low pressure cylinder zero power time operation's time last stage blade temperature control under the low vacuum in winter.
2. The utility model discloses reduced the unit because of the frostproofing risk of air cooling that the operation brought under the low back pressure operating mode in winter, also indirectly reduced the air cooling fan power consumption simultaneously.
3. The utility model discloses the reverse steam of drawing steam with low quality replaces the discharge of intermediate pressure jar to be used for city heat supply with more steam, improved the heating efficiency of unit.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure: 1-a low pressure cylinder, 2-a steam extraction valve, 3-a steam extraction pipeline, 4-a first low pressure heater, 5-a second low pressure heater and 6-an exhaust device; 7-a drain pipeline, 8-a first bypass valve, 9-a second bypass valve, 10-a steam-water separation device and 11-a bypass pipeline.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1, a steam extraction reverse cooling device for a steam turbine under a zero power working condition of a low pressure cylinder comprises a low pressure cylinder 1, a steam extraction valve 2, a steam extraction pipeline 3, a first low pressure heater 4, a second low pressure heater 5, an exhaust device 6 and a drain pipeline 7, wherein an output end of the low pressure cylinder 1 is connected with one input end of the first low pressure heater 4 through the steam extraction pipeline 3, the steam extraction valve 2 is arranged on the steam extraction pipeline 3, an output end of the second low pressure heater 5 is connected with the other input end of the first low pressure heater 4 through the drain pipeline 7, an output end of the first low pressure heater 4 is connected with an input end of the exhaust device 6 through the drain pipeline 7, the steam extraction reverse cooling device further comprises a first bypass valve 8, a second bypass valve 9, a steam-water separation device 10 and a bypass pipeline 11, one end of the first bypass valve 8 is connected with the steam extraction pipeline 3 between the steam extraction valve 2 and the first low pressure heater 4 through the bypass pipeline 11, the other end of the first bypass valve 8 is connected with the input end of a steam-water separation device 10 through a bypass pipeline 11, the output end of the steam-water separation device 10 is connected with one end of a second bypass valve 9 through the bypass pipeline 11, and the other end of the second bypass valve 9 is connected with a steam extraction pipeline 3 between the low pressure cylinder 1 and the steam extraction valve 2 through the bypass pipeline 11.
The utility model discloses the working process is as follows:
when the steam turbine unit operates under a non-zero power working condition, the steam extraction valve 2 is opened, and the extracted steam in the low-pressure cylinder 1 enters the first low-pressure heater 4 from the steam extraction pipeline 3 to heat the condensed water;
when the steam turbine unit operates under the zero-power working condition, the steam extraction valve 2 is closed, the first bypass valve 8 and the second bypass valve 9 are opened, a steam-water mixture (drain water) in the first low-pressure heater 4 enters the bypass pipeline 11 from the steam extraction pipeline 3 and then enters the steam-water separation device 10, and the separated steam reversely enters the low-pressure cylinder 1 to serve as cooling steam under the zero-power working condition, so that the temperature of the secondary-last-stage blade is reduced, zero-power operation under the high-back-pressure working condition is realized, the safety of the steam turbine unit is ensured through the steam-water separation device 10, meanwhile, the utilized low-quality steam is recycled, and high-quality steam is saved, so that more high-quality steam is used for heat supply in winter.
Claims (1)
1. The utility model provides a reverse cooling device of steam turbine extraction for under low pressure jar zero power operating mode, includes low pressure jar (1), extraction valve (2), extraction pipeline (3), first low pressure feed water heater (4), second low pressure feed water heater (5), exhaust apparatus (6) and drain pipe (7), the output of low pressure jar (1) is continuous with an input of first low pressure feed water heater (4) through extraction pipeline (3), extraction valve (2) set up on extraction pipeline (3), the output of second low pressure feed water heater (5) is continuous with another input of first low pressure feed water heater (4) through drain pipe (7), the output of first low pressure feed water heater (4) is continuous with the input of exhaust apparatus (6) through drain pipe (7), its characterized in that: still include first bypass valve (8), second bypass valve (9), catch water (10) and bypass line (11), the one end of first bypass valve (8) is passed through bypass line (11) and is extracted steam pipe way (3) between steam valve (2) and first low pressure heater (4) and link to each other, the other end of first bypass valve (8) is passed through bypass line (11) and is linked to each other with the input of catch water (10), the output of catch water (10) is passed through bypass line (11) and is linked to each other with the one end of second bypass valve (9), the other end of second bypass valve (9) is passed through bypass line (11) and is linked to each other with extraction steam pipe way (3) between low pressure cylinder (1) and steam valve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022435070.3U CN213450523U (en) | 2020-10-28 | 2020-10-28 | Steam extraction reverse cooling device of steam turbine under zero-power working condition of low-pressure cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022435070.3U CN213450523U (en) | 2020-10-28 | 2020-10-28 | Steam extraction reverse cooling device of steam turbine under zero-power working condition of low-pressure cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213450523U true CN213450523U (en) | 2021-06-15 |
Family
ID=76295891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022435070.3U Expired - Fee Related CN213450523U (en) | 2020-10-28 | 2020-10-28 | Steam extraction reverse cooling device of steam turbine under zero-power working condition of low-pressure cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213450523U (en) |
-
2020
- 2020-10-28 CN CN202022435070.3U patent/CN213450523U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111365748B (en) | Heat supply method and heat supply system of cogeneration unit | |
| CN109812866B (en) | Two-stage tandem type exhaust steam waste heat recovery heating system | |
| CN110185510B (en) | Cascade heating system of back pressure engine for cutting off low-pressure cylinder steam inlet coupling of thermoelectric unit and adjusting method | |
| CN115200064B (en) | Adjusting method of heating system combining vapor compressor with high back pressure heating | |
| CN113339089A (en) | Efficient peak regulation steam turbine system and working method thereof | |
| CN210087416U (en) | Thermoelectric unit cuts off low pressure jar steam admission coupling backpressure machine step heating system | |
| CN209780975U (en) | 135MW superhigh pressure backpressure heat supply reforms transform steam turbine | |
| CN212003287U (en) | Deep recycling system for exhaust waste heat of steam turbine of water supply pump of heat supply unit | |
| CN213450523U (en) | Steam extraction reverse cooling device of steam turbine under zero-power working condition of low-pressure cylinder | |
| CN212508456U (en) | Little steam discharge flow air cooling island system of preventing frostbite based on flue gas waste heat utilization | |
| CN215718991U (en) | High-efficient peak regulation steam turbine system | |
| CN210087417U (en) | Thermoelectric unit cuts off low pressure jar steam admission coupling heat pump step heating system | |
| CN212930547U (en) | Waste heat utilization device of indirect air cooling system | |
| CN209744495U (en) | Double-backpressure and heat pump combined heating system of air cooling unit with power of more than 300MW | |
| CN213838697U (en) | Energy-saving starting system suitable for direct air cooling unit | |
| CN110230521B (en) | Cascade heating system for heat pump by cutting off steam inlet coupling of low-pressure cylinder of thermoelectric unit and adjusting method | |
| CN210663026U (en) | Novel heating system | |
| CN212339365U (en) | Steam turbine exhaust steam recycling and heat supply system based on low-pressure cylinder cutting operation | |
| CN211119594U (en) | Double-backpressure series step heating system of air cooling unit | |
| CN210688177U (en) | Recovery device for high-temperature steam condensate and waste heat | |
| CN112855287A (en) | Low-pressure-increasing operation system and method for steam extraction temporary complementary coupling low-pressure-saving under cylinder cutting working condition | |
| CN219222634U (en) | Exhaust steam cascade heat supply energy-saving system of indirect air cooling unit | |
| CN218816564U (en) | System for peak shaving under pure condensing working condition of coal machine | |
| CN209942893U (en) | Latent heat recovery system for exhaust vaporization of steam turbine | |
| CN218455253U (en) | Novel heat supply network system suitable for large-temperature-difference heat supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210615 Termination date: 20211028 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |