CN113389605B - System and design method for improving steam supply safety of low-pressure shaft seal of thermal power plant - Google Patents
System and design method for improving steam supply safety of low-pressure shaft seal of thermal power plant Download PDFInfo
- Publication number
- CN113389605B CN113389605B CN202110814447.2A CN202110814447A CN113389605B CN 113389605 B CN113389605 B CN 113389605B CN 202110814447 A CN202110814447 A CN 202110814447A CN 113389605 B CN113389605 B CN 113389605B
- Authority
- CN
- China
- Prior art keywords
- shaft seal
- low
- steam
- pressure
- pressure shaft
- 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.)
- Active
Links
Images
Classifications
-
- 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
- F01D25/12—Cooling
-
- 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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
- F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
- F01D11/06—Control thereof
Abstract
The invention discloses a system and a design method for improving steam supply safety of a low-pressure shaft seal of a thermal power plant, wherein an auxiliary steam pipeline and a reheating cold section steam pipeline are communicated with a shaft seal main pipe, a condensed water pipeline is communicated with an atomization nozzle through a temperature reduction water regulating valve, a shaft seal main pipe bushing is arranged at the atomization nozzle, the front end and the rear end of the shaft seal main pipe bushing are provided with a shaft seal main pipe drainage device, a steam outlet is arranged on the shaft seal main pipe, the steam outlet is communicated with one end of a first low-pressure shaft seal steam inlet branch pipe and one end of a second low-pressure shaft seal steam inlet branch pipe through a low-pressure cylinder shaft seal steam inlet main pipe, and the other end of the first low-pressure shaft seal steam inlet branch pipe and the other end of the second low-pressure shaft seal steam inlet branch pipe are communicated with a low-pressure shaft seal in a low-pressure cylinder of a steam turbine; the system can realize automatic stable control of low-pressure shaft seal steam inlet temperature and improve the steam supply safety of the low-pressure shaft seal.
Description
Technical Field
The invention belongs to the technical field of safe operation of steam turbines, and relates to a system and a design method for improving steam supply safety of a low-pressure shaft seal of a thermal power plant.
Background
The shaft seals of the existing large steam turbine are of self-sealing structures, and low-pressure cylinder shaft seals supply steam to enter the low-pressure cylinder shaft seals after water spraying and temperature reducing through steam leakage of high-pressure cylinder shaft seals and medium-pressure cylinder shaft seals. In order to ensure the safety of the low-pressure shaft seal and the shaft seal, the temperature of the shaft seal entering the low-pressure cylinder is usually controlled to be 121-177 ℃ and the pressure is about 0.13 MPa.
However, the steam inlet amount of the shaft seal of the low pressure cylinder is relatively small, a certain 350MW supercritical unit is taken as an example, the rated steam inlet amount is 1.6t/h, the required water reducing amount is about 0.3t/h, the pipeline specification of the main pipe of the shaft seal is phi 219 multiplied by 9, and the steam flow rate at the main pipe of the shaft seal is low to be about 19m/s. When the shaft seal main pipe is used for spraying water to cool steam, the steam flow speed is low, and the low-flow temperature-reducing water cannot be accurately controlled, so that the steam inlet temperature of the low-pressure cylinder is difficult to realize automatic control. Through investigation, the automatic control of the inlet steam temperature of the low-pressure shaft seal is overrun, which is a common problem in the current thermal power plant. Some power plants even need to manually control the steam inlet temperature of the low-pressure shaft seal, so that the workload of operators is greatly increased. If the steam inlet temperature of the low-pressure shaft seal is too high, the front end steam seal and the rear end steam seal of the low-pressure cylinder are seriously overtemperature, so that the gap between the shaft seal is enlarged, the steam leakage quantity of the shaft seal is increased, the steam supply of the lubricating oil system generates condensed water, and the condensed water is leaked into the lubricating oil return system, so that the quality of the lubricating oil is unqualified. If the low-pressure shaft seal steam inlet temperature is controlled to be too low, the shaft seal steam inlet is carried with water, and the phase change can cause serious threat to the safety of the safe operation of the shaft seal and the unit.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a system and a design method for improving the steam supply safety of a low-pressure shaft seal of a thermal power plant.
In order to achieve the aim, the system for improving the steam supply safety of the low-pressure shaft seal of the thermal power plant comprises an auxiliary steam pipeline, a reheating cold section steam pipeline, a condensed water pipeline, a temperature reducing water regulating valve, a shaft seal main pipe, an atomizing nozzle, a low-pressure cylinder shaft seal steam inlet main pipe, a turbine low-pressure cylinder, a first low-pressure shaft seal steam inlet branch pipe and a second low-pressure shaft seal steam inlet branch pipe;
the auxiliary steam pipeline and the reheating cold section steam pipeline are communicated with a main shaft seal pipe, a condensed water pipeline is communicated with an atomization nozzle through a temperature reducing water regulating valve, a steam outlet is arranged on the main shaft seal pipe, the steam outlet is communicated with one end of a first low-pressure shaft seal steam inlet branch pipe and one end of a second low-pressure shaft seal steam inlet branch pipe through a main shaft seal steam inlet pipe of a low-pressure cylinder, and the other end of the first low-pressure shaft seal steam inlet branch pipe and the other end of the second low-pressure shaft seal steam inlet branch pipe are communicated with a low-pressure shaft seal in a low-pressure cylinder of the steam turbine;
the first low-pressure shaft seal steam inlet branch pipe is provided with a first low-pressure shaft seal steam inlet branch pipe temperature monitoring device, the second low-pressure shaft seal steam inlet branch pipe is provided with a second low-pressure shaft seal steam inlet branch pipe temperature monitoring device, and the controller is connected with the first low-pressure shaft seal steam inlet branch pipe temperature monitoring device, the second low-pressure shaft seal steam inlet branch pipe temperature monitoring device and the temperature reducing water regulating valve.
A lining is arranged in the shaft seal main pipe, wherein the atomizing nozzle is positioned in the lining.
The condensed water pipeline is communicated with the atomizing nozzle through a temperature-reducing water manual valve and a temperature-reducing water temperature-regulating valve.
The first low-pressure shaft seal steam inlet branch pipe temperature monitoring device and the second low-pressure shaft seal steam inlet branch pipe temperature monitoring device are thermocouples.
The device also comprises a first shaft seal main pipe drainage device and a second shaft seal main pipe drainage device;
the first shaft seal main pipe drainage device and the second shaft seal main pipe drainage device are communicated with the shaft seal main pipe, and the bushing is positioned between the first shaft seal main pipe drainage device and the second shaft seal main pipe drainage device.
The shaft seal main pipe is provided with pressure measuring points, wherein the pressure measuring points, the bushing and the steam outlet are distributed in sequence along the steam flowing direction.
A design method of a system for improving steam supply safety of a low-pressure shaft seal of a thermal power plant comprises the following steps:
inner diameter D of bushing 2 The method comprises the following steps:
wherein G is the design flow entering the low-pressure shaft seal, v is the specific volume of the medium, and ω max Is the medium flow rate.
Distance H between atomizer and bushing outlet 1 Satisfies the condition shown in the formula (4):
H 1 ≥ω max t (4)
wherein omega max T is the time required for complete atomization of the water droplets, which is the maximum flow rate of steam in the liner.
Distance H between atomizer and steam outlet 2 Satisfies the condition shown in the formula (5):
H 2 ≥0.3ω max (5)
wherein omega max Is the maximum flow rate of steam within the liner.
The invention has the following beneficial effects:
according to the system and the design method for improving the steam supply safety of the low-pressure shaft seal of the thermal power plant, when the system and the design method are specifically operated, the controller controls the temperature-reducing water regulating valve according to the temperature measured by the first low-pressure shaft seal steam inlet branch pipe temperature monitoring device and the second low-pressure shaft seal steam inlet branch pipe temperature monitoring device so as to control the amount of the temperature-reducing water entering the main shaft of the shaft seal, and then controls the temperature of the low-pressure Wen Zhoufeng steam entering the low-temperature shaft seal, so that the automatic stable control of the steam inlet temperature of the low-pressure shaft seal is realized, and the steam supply safety of the low-pressure shaft seal is improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a graph of flow characteristics of a desuperheating water flow regulator valve;
the system comprises a manual valve for reducing temperature water 1, a manual valve for reducing temperature water 2, a main shaft seal pipe 3, an atomizing nozzle 4, a bushing 5, a steam outlet 6, a first main shaft seal pipe drainage device 7, a second main shaft seal pipe drainage device 8, a low-pressure cylinder shaft seal steam inlet main pipe 9, a first low-pressure shaft seal steam inlet branch pipe temperature monitoring device 10, a second low-pressure shaft seal steam inlet branch pipe temperature monitoring device 11, a low-pressure cylinder of a steam turbine 12, a pressure measuring point 13, a first low-pressure shaft seal steam inlet branch pipe 14 and a second low-pressure shaft seal steam inlet branch pipe 15.
Detailed Description
In order to make the present invention better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, but not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
In the accompanying drawings, there is shown a schematic structural diagram in accordance with a disclosed embodiment of the invention. The figures are not drawn to scale, wherein certain details are exaggerated for clarity of presentation and may have been omitted. The shapes of the various regions, layers and their relative sizes, positional relationships shown in the drawings are merely exemplary, may in practice deviate due to manufacturing tolerances or technical limitations, and one skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions as actually required.
Referring to fig. 1, the system for improving the steam supply safety of the low-pressure shaft seal of the thermal power plant comprises a manual valve 1 for reducing temperature water, a valve 2 for reducing temperature water, a shaft seal main pipe 3, an atomizing nozzle 4, a bushing 5, a first shaft seal main pipe drainage device 7, a second shaft seal main pipe drainage device 8, a low-pressure cylinder shaft seal steam inlet main pipe 9, a first low-pressure shaft seal steam inlet branch pipe temperature monitoring device 10, a second low-pressure shaft seal steam inlet branch pipe temperature monitoring device 11, a low-pressure cylinder 12 for a steam turbine, a first low-pressure shaft seal steam inlet branch pipe 14 and a second low-pressure shaft seal steam inlet branch pipe 15;
be provided with liner 5 in the bearing seal main pipe 3, wherein, atomizer 4 is located in liner 5, supplementary steam pipe and reheat cold section steam pipe are linked together with bearing seal main pipe 3, and the condensate pipe is linked together with atomizer 4 through manual valve 1 of subtracting warm water and subtracting warm water regulating valve 2, is provided with steam outlet 6 on the bearing seal main pipe 3, steam outlet 6 is linked together with the one end of first low pressure bearing seal steam inlet branch pipe 14 and the one end of second low pressure bearing seal steam inlet branch pipe 15 through low pressure cylinder bearing seal main pipe 9, and the other end of first low pressure bearing seal steam inlet branch pipe 14 and the other end of second low pressure bearing seal steam inlet branch pipe 15 are linked together with the low pressure bearing seal in the steam turbine low pressure cylinder 12.
The first low-pressure shaft seal steam inlet branch pipe 14 is provided with a first low-pressure shaft seal steam inlet branch pipe temperature monitoring device 10, the second low-pressure shaft seal steam inlet branch pipe 15 is provided with a second low-pressure shaft seal steam inlet branch pipe temperature monitoring device 11, and the first low-pressure shaft seal steam inlet branch pipe temperature monitoring device 10 and the second low-pressure shaft seal steam inlet branch pipe temperature monitoring device 11 are thermocouples and are locked with the temperature reducing water regulating valve 2.
The first shaft seal main pipe drainage device 7 and the second shaft seal main pipe drainage device 8 are communicated with the shaft seal main pipe 3, the bushing 5 is positioned between the first shaft seal main pipe drainage device 7 and the second shaft seal main pipe drainage device 8, and the outlet of the low-pressure cylinder 12 of the steam turbine is communicated with the second shaft seal main pipe drainage device 8.
The shaft seal main pipe 3 is provided with a pressure measuring point 13, wherein the pressure measuring point 13, the bushing 5 and the steam outlet 6 are distributed in sequence along the steam flowing direction.
During operation, the low-pressure shaft seal steam supply is led out from a condensed water pipeline, atomized by an atomization nozzle 4 after passing through a low-pressure shaft seal steam supply manual valve 1 and a low-pressure shaft seal steam supply manual valve 2, atomized low-pressure water is mixed with steam in a shaft seal main pipe 3, the temperature of the steam in the shaft seal main pipe 3 is reduced, the cooled steam is led out from a steam outlet 6 and enters a first low-pressure shaft seal steam inlet branch pipe 14 and a second low-pressure shaft seal steam inlet branch pipe 15, and then enters a low-pressure shaft seal in a low-pressure cylinder 12 of a steam turbine, so that the low-pressure shaft seal steam supply is realized.
The design method of the system for improving the steam supply safety of the low-pressure shaft seal of the thermal power plant comprises the following steps:
the designed inner diameter of the shaft seal main pipe 3 is 200mm, the rated steam inlet amount of a low-pressure shaft seal in the low-pressure cylinder 12 of the steam turbine is 1.5t/h, the pressure of the shaft seal main pipe 3 is 0.13MPa, the steam inlet temperature of the low-pressure shaft seal is 121-177 ℃, the pressure fluctuation range of the temperature-reduced water is 1.2-3.5MPa, and the temperature fluctuation range of the temperature-reduced water is 25-45 ℃.
The flow rate characteristic of the desuperheating water regulating valve 2 needs to be close to the linear characteristic, and the flow rate characteristic is shown in fig. 2. The flow of the temperature reducing water is calculated according to a mass conservation equation (1) and an energy conservation equation (2), the designed rated flow of the temperature reducing water regulating valve 2 is 0.5t/h, and linear regulation can be realized within the range of 0.2t/h to 0.8 t/h.
m jq ＝m jws +m zq (1)
m jq H jq ＝m jws H jws +m zq H zq (2)
Inner diameter D of bushing 5 2 Calculated according to the formula (3), wherein G is the design flow entering the low-pressure shaft seal, v is the specific volume of the medium, and ω max For medium flow rate, the medium flow rate is larger than 25m/s under the design working condition, and the inner diameter is selected to be 160mm.
Distance H between atomizer 4 and bushing 5 outlet 1 Satisfies the condition represented by formula (4), ω max For the maximum flow rate of steam in the lining 5, t is the time required for complete atomization of water drops, and the distance between the atomization nozzle 4 and the inlet of the lining 5 is greater than or equal to 5D 2 。
H 1 ≥ω max t (4)
The steam outlet 6 is positioned at the top of the shaft seal main pipe 3, and the distance H between the atomizing nozzle 4 and the steam outlet 6 2 Satisfy the formula (5)Under the condition that the maximum flow rate of the steam outlet 6 is 25m/s, H 2 Is 7.5m in length.
H 2 ≥0.3ω max (5)
The atomizing nozzle 4 is a spring nozzle, the atomizing nozzle 4 extends into the shaft seal main pipe 3 to the position of the axis, and the spraying direction of the atomizing nozzle 4 is consistent with the steam flowing direction.
The first shaft seal main pipe drainage device 7 comprises a manual door, an automatic drainage device and a manual door which are sequentially communicated and is used for timely draining drainage during normal operation; the first shaft seal main pipe drainage device 7 comprises a drainage manual valve and a drainage pneumatic valve which are sequentially communicated and is used for drainage in the starting and stopping processes of the unit.
The distance between the first low-pressure shaft seal steam inlet branch pipe temperature monitoring device 10 and the second low-pressure shaft seal steam inlet branch pipe temperature monitoring device 11 and the steam outlet 6 is 2m.
The control object of the temperature reducing water regulating valve 2 is the average value of the results measured by the first low-pressure shaft seal steam inlet branch pipe temperature monitoring device 10 and the second low-pressure shaft seal steam inlet branch pipe temperature monitoring device 11.
Claims (5)
1. The system for improving the steam supply safety of the low-pressure shaft seal of the thermal power plant is characterized by comprising an auxiliary steam pipeline, a reheating cold section steam pipeline, a condensate pipeline, a temperature reducing water regulating valve (2), a shaft seal main pipe (3), an atomizing nozzle (4), a low-pressure cylinder shaft seal steam inlet main pipe (9), a steam turbine low-pressure cylinder (12), a first low-pressure shaft seal steam inlet branch pipe (14) and a second low-pressure shaft seal steam inlet branch pipe (15);
the auxiliary steam pipeline and the reheating cold section steam pipeline are communicated with a shaft seal main pipe (3), a condensed water pipeline is communicated with an atomizing nozzle (4) through a temperature reducing water regulating valve (2), a steam outlet (6) is arranged on the shaft seal main pipe (3), the steam outlet (6) is communicated with one end of a first low-pressure shaft seal steam inlet branch pipe (14) and one end of a second low-pressure shaft seal steam inlet branch pipe (15) through a low-pressure cylinder shaft seal steam inlet main pipe (9), and the other end of the first low-pressure shaft seal steam inlet branch pipe (14) and the other end of the second low-pressure shaft seal steam inlet branch pipe (15) are communicated with a low-pressure shaft seal in a low-pressure cylinder (12) of the steam turbine;
the first low-pressure shaft seal steam inlet branch pipe (14) is provided with a first low-pressure shaft seal steam inlet branch pipe temperature monitoring device (10), the second low-pressure shaft seal steam inlet branch pipe (15) is provided with a second low-pressure shaft seal steam inlet branch pipe temperature monitoring device (11), and the controller is connected with the first low-pressure shaft seal steam inlet branch pipe temperature monitoring device (10), the second low-pressure shaft seal steam inlet branch pipe temperature monitoring device (11) and the temperature reducing water regulating valve (2);
a lining (5) is arranged in the shaft seal main pipe (3), wherein the atomizing nozzle (4) is positioned in the lining (5);
inner diameter D of bushing (5) 2 The method comprises the following steps:
wherein G is the design flow entering the low-pressure shaft seal, v is the specific volume of the medium, and ω is the flow velocity of the medium;
distance H between atomizer (4) and bushing (5) outlet 1 Satisfies the condition shown in the formula (4):
H 1 ≥ω max t (4)
wherein omega max Is the maximum flow rate of steam in the liner (5), t is the time required for complete atomization of the water droplets;
distance H between the atomizing nozzle (4) and the steam outlet (6) 2 Satisfies the condition shown in the formula (5):
H 2 ≥0.3 ω max (5)。
2. the system for improving the steam supply safety of the low-pressure shaft seal of the thermal power plant according to claim 1, wherein the condensed water pipeline is communicated with the atomizing nozzle (4) through a desuperheating water manual valve (1) and a desuperheating water regulating valve (2).
3. The system for improving the steam supply safety of the low-pressure shaft seal of the thermal power plant according to claim 1, wherein the first low-pressure shaft seal steam inlet branch pipe temperature monitoring device (10) and the second low-pressure shaft seal steam inlet branch pipe temperature monitoring device (11) are thermocouples.
4. The system for improving the steam supply safety of the low-pressure shaft seal of the thermal power plant according to claim 1, further comprising a first shaft seal main drain device (7) and a second shaft seal main drain device (8);
the first shaft seal main pipe drainage device (7) and the second shaft seal main pipe drainage device (8) are both communicated with the shaft seal main pipe (3), and the bushing (5) is positioned between the first shaft seal main pipe drainage device (7) and the second shaft seal main pipe drainage device (8).
5. The system for improving the steam supply safety of the low-pressure shaft seal of the thermal power plant according to claim 4, wherein the shaft seal main pipe (3) is provided with pressure measuring points (13), and the pressure measuring points (13), the bushing (5) and the steam outlet (6) are sequentially distributed along the steam flow direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110814447.2A CN113389605B (en) | 2021-07-19 | 2021-07-19 | System and design method for improving steam supply safety of low-pressure shaft seal of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110814447.2A CN113389605B (en) | 2021-07-19 | 2021-07-19 | System and design method for improving steam supply safety of low-pressure shaft seal of thermal power plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113389605A CN113389605A (en) | 2021-09-14 |
| CN113389605B true CN113389605B (en) | 2023-05-30 |
Family
ID=77626661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110814447.2A Active CN113389605B (en) | 2021-07-19 | 2021-07-19 | System and design method for improving steam supply safety of low-pressure shaft seal of thermal power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113389605B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112411B (en) * | 2021-10-30 | 2023-09-08 | 国家能源集团华北电力有限公司廊坊热电厂 | Steam turbine shaft seal system state monitoring system and method |
| CN114382556B (en) * | 2021-12-28 | 2023-08-18 | 东方电气集团东方汽轮机有限公司 | Steam supply structure of steam turbine shaft seal system and adjusting method |
| CN114934817B (en) * | 2022-04-28 | 2023-11-17 | 中国电建集团华东勘测设计研究院有限公司 | Shaft seal steam supply system of middle-low pressure cylinder type steam turbine and operation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701246A (en) * | 2017-11-27 | 2018-02-16 | 辽宁大唐国际锦州热电有限责任公司 | Turbine low pressure cylinder axle envelope spray desuperheating device |
| CN207905867U (en) * | 2018-01-30 | 2018-09-25 | 江苏国信淮安第二燃气发电有限责任公司 | A kind of steam turbine steam shaft seal steam supply system of jet dynamic control |
| CN210662817U (en) * | 2019-07-22 | 2020-06-02 | 重庆卡贝乐化工有限责任公司 | Temperature reducing device for protecting steam pipeline |
| CN211026761U (en) * | 2019-07-08 | 2020-07-17 | 赖祥琴 | Improved atomizer |
| CN112610286A (en) * | 2020-12-30 | 2021-04-06 | 西安热工研究院有限公司 | Multi-steam-source shaft seal steam/gas supply system of power station unit and control method thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8888436B2 (en) * | 2011-06-23 | 2014-11-18 | General Electric Company | Systems and methods for cooling high pressure and intermediate pressure sections of a steam turbine |
| CN205895328U (en) * | 2016-08-08 | 2017-01-18 | 大唐七台河发电有限责任公司 | Power station steam turbine shaft seals and subtracts warm system |
| CN206092082U (en) * | 2016-10-25 | 2017-04-12 | 国家电网公司 | Coal fired power plant steam turbine shaft seal supplies vapour station |
| CN107559051A (en) * | 2017-10-24 | 2018-01-09 | 湛江电力有限公司 | A kind of one grade of steam loss regulating system of turbine shaft seal and its adjusting method |
| CN207348904U (en) * | 2017-10-24 | 2018-05-11 | 湛江电力有限公司 | A kind of one grade of steam loss regulating system of turbine shaft seal |
| CN108194151B (en) * | 2018-02-06 | 2024-04-09 | 湛江电力有限公司 | Steam turbine shaft seal steam supply adjusting device and method |
| CN112282866A (en) * | 2020-11-18 | 2021-01-29 | 贵州电网有限责任公司 | Steam turbine generator unit shaft seal steam supply pipeline heating system and control method thereof |
| CN112879107A (en) * | 2021-03-23 | 2021-06-01 | 西安热工研究院有限公司 | Shaft seal auxiliary steam source heat standby device and control method thereof |
-
2021
- 2021-07-19 CN CN202110814447.2A patent/CN113389605B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701246A (en) * | 2017-11-27 | 2018-02-16 | 辽宁大唐国际锦州热电有限责任公司 | Turbine low pressure cylinder axle envelope spray desuperheating device |
| CN207905867U (en) * | 2018-01-30 | 2018-09-25 | 江苏国信淮安第二燃气发电有限责任公司 | A kind of steam turbine steam shaft seal steam supply system of jet dynamic control |
| CN211026761U (en) * | 2019-07-08 | 2020-07-17 | 赖祥琴 | Improved atomizer |
| CN210662817U (en) * | 2019-07-22 | 2020-06-02 | 重庆卡贝乐化工有限责任公司 | Temperature reducing device for protecting steam pipeline |
| CN112610286A (en) * | 2020-12-30 | 2021-04-06 | 西安热工研究院有限公司 | Multi-steam-source shaft seal steam/gas supply system of power station unit and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113389605A (en) | 2021-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113389605B (en) | System and design method for improving steam supply safety of low-pressure shaft seal of thermal power plant | |
| EP3715593B1 (en) | Power plant and power output increase controlling method for power plant | |
| CN108999653B (en) | Shaft seal device for adjustable extraction steam turbine and working method of shaft seal device | |
| US20110023491A1 (en) | System and method for supplying fuel to a gas turbine | |
| CN108343479A (en) | A kind of solidifying pumping back of the body heating system and adjusting method based on two units | |
| CN110671162B (en) | Steam pressure matcher and control method thereof | |
| CN111255529B (en) | Rapid response automatic power generation control system and method during operation of heat supply cylinder cutting unit | |
| CN106640246A (en) | Safe operation realizing system and method using pressure energy of natural gas pipeline network | |
| CN112523821A (en) | Network source coordinated heating system and method with self-adaptive steam extraction and heating load | |
| CN106988803B (en) | A kind of low pressure (LP) cylinder linear leaf cooling system and method based on extraction opening | |
| CN111502787B (en) | Method for automatically controlling high side valve in high side and low side combined heat supply unit | |
| CN109611166B (en) | Condensing back-pumping heat supply system for variable working conditions of multi-low pressure cylinder steam turbine and operation method | |
| CN105888753B (en) | Medium-pressure and low-pressure industrial steam supply method and system through medium-pressure and low-pressure communication butterfly valve adjustment and hot press adoption | |
| CN209398458U (en) | A kind of energy saving desuperheat self-sealing system of turbine shaft seal | |
| CN203264894U (en) | Nozzle structure of sound-speed-variable temperature-reduction pressure-reduction capacity-increasing device | |
| CN104405457B (en) | A kind of energy gradient utilization system of back pressure turbine heat supply | |
| CN106884689B (en) | A kind of method of small-sized steam-extracting type heat supply steam turbine steam discharge wet down | |
| CN113446074A (en) | System and method for improving steam supply, water spraying and atomizing effects of low-pressure shaft seal of steam turbine by using auxiliary atomized steam | |
| CN207131453U (en) | A kind of steam turbine of low pressure shaft seal Desuperheating device and the built-in Desuperheating device | |
| CN209068487U (en) | Supercritical carbon dioxide boiler gas side temperature reducing system | |
| CN204238990U (en) | A kind of energy gradient utilization system of back pressure turbine heat supply | |
| CN103263982A (en) | Nozzle structure of temperature and pressure reducing and capacity increasing device with variable sound speed | |
| CN206724137U (en) | A kind of system for preventing economizer exit working medium from vaporizing | |
| CN207245769U (en) | A kind of low pressure (LP) cylinder linear leaf cooling system based on feed pump turbine steam discharge | |
| CN206801621U (en) | A kind of low pressure (LP) cylinder linear leaf cooling system based on extraction opening |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |