CN210622874U - System for cleaning rotor during starting of steam turbine in synthetic ammonia production - Google Patents
System for cleaning rotor during starting of steam turbine in synthetic ammonia production Download PDFInfo
- Publication number
- CN210622874U CN210622874U CN201921579574.3U CN201921579574U CN210622874U CN 210622874 U CN210622874 U CN 210622874U CN 201921579574 U CN201921579574 U CN 201921579574U CN 210622874 U CN210622874 U CN 210622874U
- Authority
- CN
- China
- Prior art keywords
- steam
- valve
- steam turbine
- boiler water
- pipe
- 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
Landscapes
- Control Of Turbines (AREA)
Abstract
The utility model discloses a system for rotor when washing steam turbine in synthetic ammonia production starts, the system contains the steam turbine, be used for letting in the steam pipe network of middling pressure steam in the steam turbine and be equipped with first, two steam gate valves in proper order, quick-closing valve and governing valve, it has the bypass valve to connect in parallel between the steam inlet and the steam outlet of first steam gate valve, be connected with the boiler water pipeline that is used for joining in boiler water to the steam pipe network between second steam gate valve and quick-closing valve, and be equipped with water distribution valve and blind flange along the rivers direction in proper order on the boiler water pipeline, still be equipped with on the boiler water pipeline and be used for sending the partial boiler water of blind flange into the flash tank and carry out the boiler water lateral conduit of vapour-liquid separation; the steam pipe network is also provided with an emptying pipe, and the emptying pipe is provided with a first heating pipe emptying valve and a second heating pipe emptying valve. The utility model discloses utilize saturated wet steam to wash, can realize washing off the purpose of the scaling thing that accumulates on rotor sound blade and the nozzle under the unit non-stop state.
Description
Technical Field
The utility model belongs to the technical field of chemical production, a mode that steam belt water washd chemical industry equipment is related to, especially relate to a system of rotor when steam turbine starts in the synthetic ammonia production with saturated wet steam cleaning.
Background
When the synthetic ammonia device normally operates, because the operating time period of the steam turbine is long, the quality of medium-high pressure steam cannot be well guaranteed, the scaling of the rotor and the main runner of the rotor is more and more, the regulation stage pressure of the steam turbine is obviously increased under the same load, the steam consumption is increased along with the consumption, the work capacity of the steam turbine is finally greatly reduced, and the economic effect is seriously reduced.
Disclosure of Invention
In order to solve the problem that exists among the current steam turbine cleaning process, the utility model discloses a system of rotor when rinsing steam turbine start-up in synthetic ammonia production utilizes saturated wet steam to wash, can realize washing off the purpose of the scaling thing that accumulates on rotor sound blade and the nozzle under the unit non-stop state.
The technical scheme of the utility model is realized like this:
the utility model discloses a system for cleaning a rotor when a steam turbine in synthetic ammonia production is started, which comprises a steam turbine (7) and a steam pipe network for introducing medium-pressure steam into the steam turbine (7), a first steam gate valve (1), a second steam gate valve (2), a quick closing valve (5) and an adjusting valve (6) are sequentially arranged on the steam pipe net along the conveying direction of medium-pressure steam, a bypass valve (9) is connected in parallel between the steam inlet and the steam outlet of the first steam gate valve (1), a boiler water pipeline used for distributing boiler water into the steam pipe network is connected between the second steam gate valve (2) and the quick-closing valve (5), a water distribution valve (4) and a blind flange (3) are sequentially arranged on the boiler water pipeline along the water flow direction, a boiler water branch pipeline for sending part of boiler water of the blind flange (3) into the flash tank (8) for vapor-liquid separation is also arranged on the boiler water pipeline; and an emptying pipe is also arranged on the steam pipe network, and a first heating pipe emptying valve (10) and a second heating pipe emptying valve (11) are arranged on the emptying pipe.
As a preferred embodiment, in order to clean the steam turbine rotor, the blind flange (3) is a blind flange with a hole in the middle, namely, the blind flange without the hole in the middle can be punched and reformed into the blind flange with the hole in the middle, so that the rotor in the steam turbine can be conveniently cleaned.
In a preferred embodiment, the blow-down pipe is arranged between the boiler water line and the quick-closing valve (5).
In a preferred embodiment, a blowdown tank for receiving condensate after cleaning is provided below the steam turbine.
The method for cleaning the rotor when the steam turbine is started in the production of synthetic ammonia is to add boiler water with the pressure of 12-20 MPa and the temperature of 380-450 ℃ into medium-pressure steam with the pressure of 1.5-2.5 MPa and to the steam turbine to change the boiler water into saturated wet steam with the pressure of 2-4MPa and the temperature of 230-250 ℃, and wash the moving and static blades in the steam turbine when the rotating speed does not exceed 1500 rpm. An on-line cleaning method for the rotor of steam turbine features that the water (16 MPa.420 deg.C) is sprayed to the medium-pressure steam inlet of steam turbine to change the medium-pressure steam into saturated wet steam, and the dirt accumulated on the stator blades of steam turbine is cleaned by the water carried by steam at 1500 rpm.
Further, heating the pipe by medium-pressure steam with the pressure of 1.5-2.5 MPa and the temperature of 210-250 ℃, and condensing and cleaning the steam turbine while applying work to the steam turbine by using saturated wet steam; then, the medium-pressure steam with the pressure of 1.5-2.5 MPa and the temperature of 380-450 ℃ is added into the medium-pressure steam with the pressure of 12-20 MPa and the temperature of 230-250 ℃ to change the boiler water into saturated wet steam with the pressure of 2-4MPa, and the moving and static blades in the steam turbine are washed when the rotating speed does not exceed 1500 rpm.
As a preferred embodiment, the method for cleaning the rotor at the starting time of a steam turbine in the production of synthetic ammonia is realized by the following steps:
(1) low-pressure heating pipe: opening a bypass valve (9) and a second steam gate valve (2) to warm the steam turbine, when the steam pressure in the medium-pressure steam pipe network rises to 1.5-2.5 MPa and the temperature is maintained between 210-250 ℃, the steam turbine is reset and then slowly opens a quick-closing valve (5) and an adjusting valve (6) to start to wash a rotor of the steam turbine, the medium-pressure steam in the medium-pressure steam pipe network is maintained at the pressure of 1.5-2.5 MPa and the temperature of 210-250 ℃ through the bypass valve (9), and the medium-pressure steam is condensed to clean the steam turbine while applying work to the steam turbine through the medium-pressure steam;
(2) low-speed cleaning: controlling the rotating speed of the steam turbine to be 1000-1500 rpm, and regulating a water distribution valve (4) to enable saturated wet steam formed by medium-pressure steam and boiler water to be maintained at 2-4MPa and at a temperature of 230-; in the water injection and temperature reduction process, the opening degree of a boiler water distributing valve (4) is adjusted at any time to ensure that a steam turbine operates at the temperature of saturated wet steam; if the temperature of steam is lower than the saturation temperature during water injection, open water in the steam impacts a steam turbine rotor, so that the vibration of the steam turbine is increased easily, and a steam turbine bearing bush or even the rotor is damaged in serious cases; meanwhile, shaft vibration, shaft displacement and bearing bush temperature change of the steam turbine are closely monitored, equipment damage is avoided, and if vibration values and displacement are seriously deviated, a brake needs to be opened and stopped in time;
(3) and (3) condensate detection: analyzing flushing water flowing out of the steam turbine, stopping distributing boiler water into the steam pipe network by a ratio-variable water distribution valve after the flushing water is analyzed to be qualified, raising the temperature of medium-pressure steam in the steam pipe network to 230-250 ℃ and raising the pressure to 2-4 MPa; the flushed condensed water in the sewage draining tank can be sampled and analyzed once every 10 minutes to analyze SiO in the condensed water2，Na+The conductivity content and the color of the condensate are observed to judge the cleaning effect; and after the condensate is determined to be qualified through analysis, the water distribution valve (4) is closed, water injection is stopped, then the temperature and the pressure of the steam are gradually increased to normal values, the rotating speed is continuously increased, and normal driving and grid connection are carried out. If the rotating speed is not increased, the cleaning is needed to be carried out again, and the final cleaning effect is to be based on the pressure change condition of the wheel chamber after the load is normal.
Furthermore, the cleaning effect can be improved by increasing the steam amount at the inlet in the modes of increasing the rotating speed, reducing the steam pressure, reducing the exhaust vacuum degree and the like, and the critical rotating speed of the steam turbine is avoided when the rotating speed is increased.
The utility model discloses under equal load, not only the steam turbine regulation level pressure descends obviously, has increased the acting capacity of steam turbine, and the steam consumption volume obviously descends moreover, and economic effect is showing very much. The flow rate of the medium-pressure steam can be saved by about 120t every day, and great economic benefit is created.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 these drawings without inventive exercise.
Fig. 1 is a flow chart of the present invention for cleaning the rotor of a steam turbine when the steam turbine is started.
In the figure: a first steam gate valve; 2. a second steam gate valve; 3. a blind flange with an opening; 4. a water distribution valve; 5. quickly closing the valve; 6. adjusting a valve; 7. a steam turbine; 8. a flash tank; 9. a bypass valve; 10. a first warm pipe blow-down valve; 11. and a second warm pipe emptying valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The system for cleaning the rotor at the start of a steam turbine in the production of synthetic ammonia, as shown in figure 1, comprises the steam turbine (7) and also comprises a steam pipe network for introducing medium-pressure steam into the steam turbine (7), a first steam gate valve (1), a second steam gate valve (2), a quick closing valve (5) and an adjusting valve (6) are sequentially arranged on the steam pipe net along the conveying direction of medium-pressure steam, a bypass valve (9) is connected in parallel between the steam inlet and the steam outlet of the first steam gate valve (1), a boiler water pipeline used for distributing boiler water into the steam pipe network is connected between the second steam gate valve (2) and the quick-closing valve (5), a water distribution valve (4) and a blind flange (3) are sequentially arranged on the boiler water pipeline along the water flow direction, a boiler water branch pipeline for sending part of boiler water of the blind flange (3) into the flash tank (8) for vapor-liquid separation is also arranged on the boiler water pipeline; an emptying pipe is further arranged on the steam pipe network, the emptying pipe is arranged between a boiler water pipeline and a quick closing valve (5), and a first heating pipe emptying valve (10) and a second heating pipe emptying valve (11) are arranged on the emptying pipe; the blind flange (3) is a blind flange with a hole in the middle, and a sewage draining groove for receiving the cleaned condensate is arranged below the steam turbine.
The medium-pressure steam from the steam pipe network firstly passes through a first steam gate valve and a second steam gate valve on an inlet pipeline and then enters a steam turbine to rotate to do work through a quick closing valve 5 and a regulating valve 6; the boiler water is supplied by a boiler water pipeline connecting a water distribution valve 4 and an open blind flange 3 and is used for providing circulating boiler water for a steam turbine 7; the liquid return port is communicated with a water outlet pipe of the surface cooler through a steam turbine; the liquid return port refers to an exhaust steam outlet after the steam turbine completes work, is located at the tail end of the steam turbine, and is connected to the tail end of the steam turbine through a surface cooler and used for providing heat exchange equipment for the exhaust steam of the steam turbine.
The method for cleaning the rotor when the steam turbine is started in the production of synthetic ammonia comprises the steps of warming a pipe by medium-pressure steam with the pressure of 1.5-2.5 MPa and the temperature of 210-250 ℃, and condensing and cleaning the steam turbine while applying work to the steam turbine by using saturated wet steam; then, the medium-pressure steam with the pressure of 1.5-2.5 MPa and the temperature of 380-450 ℃ is added into the medium-pressure steam with the pressure of 12-20 MPa and the temperature of 230-250 ℃ to change the boiler water into saturated wet steam with the pressure of 2-4MPa, and the moving and static blades in the steam turbine are washed when the rotating speed does not exceed 1500 rpm.
Specifically, the method for cleaning the rotor when the steam turbine is started in the production of synthetic ammonia is realized by the following steps:
(1) low-pressure heating pipe: opening a bypass valve (9) and a second steam gate valve (2) to warm the steam turbine, when the steam pressure in the medium-pressure steam pipe network rises to 1.5-2.5 MPa and the temperature is maintained between 210-250 ℃, pressing a reset button after the start condition is met, slowly opening a quick closing valve (5) and an adjusting valve (6) after the steam turbine is reset, starting to flush the steam turbine, wherein the process that the steam turbine runs from a low rotating speed to a high rotating speed is one process, the medium-pressure steam in the medium-pressure steam pipe network is maintained at the pressure of 1.5-2.5 MPa and the temperature of 210-250 ℃ through the bypass valve (9), and the steam turbine is condensed to be cleaned while the medium-pressure steam works on the steam turbine;
(2) low-speed cleaning: controlling the rotating speed of the steam turbine to be 1000-1500 rpm, and regulating a water distribution valve (4) to enable saturated wet steam formed by medium-pressure steam and boiler water to be maintained at 2-4MPa and at a temperature of 230-; in the water injection and temperature reduction process, the opening degree of a boiler water distributing valve (4) is adjusted at any time to ensure that a steam turbine operates at the temperature of saturated wet steam; if the temperature of steam is lower than the saturation temperature during water injection, open water in the steam impacts a steam turbine rotor, so that the vibration of the steam turbine is increased easily, and a steam turbine bearing bush or even the rotor is damaged in serious cases; meanwhile, shaft vibration, shaft displacement and bearing bush temperature change of the steam turbine are closely monitored, equipment damage is avoided, and if vibration values and displacement are seriously deviated, a brake needs to be opened and stopped in time;
(3) and (3) condensate detection: analyzing flushing water flowing out of the steam turbine, stopping distributing boiler water into the steam pipe network by a ratio-variable water distribution valve after the flushing water is analyzed to be qualified, raising the temperature of medium-pressure steam in the steam pipe network to 230-250 ℃ and raising the pressure to 2-4 MPa; the flushed condensed water in the sewage draining tank can be sampled and analyzed once every 10 minutes to analyze SiO in the condensed water2，Na+The conductivity content and the color of the condensate are observed to judge the cleaning effect; and after the condensate is determined to be qualified through analysis, the water distribution valve (4) is closed, water injection is stopped, then the temperature and the pressure of the steam are gradually increased to normal values, the rotating speed is continuously increased, and normal driving and grid connection are carried out. If the rotating speed is not increased, the cleaning is needed to be carried out again, and the final cleaning effect is to be based on the pressure change condition of the wheel chamber after the load is normal.
After the unit is normally driven, the steam consumption is obviously reduced under the same load (70 t/h before cleaning and 65.3t/h after cleaning), and the economic effect is very obvious; the pressure of the adjusting stage is obviously reduced (3.2 MPa is reduced to 2.3 MPa), and the work doing capability of the steam turbine is improved; the vibration of the high-pressure side is obviously reduced from 53-56 μm to 37-39 μm.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A system for cleaning a rotor during the start-up of a steam turbine in the production of synthetic ammonia comprises a steam turbine (7) and is characterized in that: the steam boiler is characterized by further comprising a steam pipe network used for introducing medium-pressure steam into a steam turbine (7), wherein a first steam gate valve (1), a second steam gate valve (2), a quick closing valve (5) and a regulating valve (6) are sequentially arranged on the steam pipe network along the conveying direction of the medium-pressure steam, a bypass valve (9) is connected between a steam inlet and a steam outlet of the first steam gate valve (1) in parallel, a boiler water pipeline used for distributing boiler water into the steam pipe network is connected between the second steam gate valve (2) and the quick closing valve (5), a water distribution valve (4) and a blind flange (3) are sequentially arranged on the boiler water pipeline along the water flow direction, and a boiler water branch pipeline used for sending part of the boiler water of the blind flange (3) into a flash evaporation tank (8) for steam-liquid separation is further arranged on the boiler water pipeline; and an emptying pipe is also arranged on the steam pipe network, and a first heating pipe emptying valve (10) and a second heating pipe emptying valve (11) are arranged on the emptying pipe.
2. The system for cleaning a rotor at the start-up of a steam turbine in the production of synthetic ammonia according to claim 1, wherein: the blind flange (3) is a blind flange with a hole in the middle.
3. The system for cleaning a rotor at the start-up of a steam turbine in the production of synthetic ammonia according to claim 1, wherein: the blow-down pipe is arranged between a boiler water pipeline and the quick-closing valve (5).
4. The system for cleaning a rotor at the start-up of a steam turbine in the production of synthetic ammonia according to claim 1, wherein: and a sewage discharge groove for receiving the cleaned condensate is arranged below the steam turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921579574.3U CN210622874U (en) | 2019-09-23 | 2019-09-23 | System for cleaning rotor during starting of steam turbine in synthetic ammonia production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921579574.3U CN210622874U (en) | 2019-09-23 | 2019-09-23 | System for cleaning rotor during starting of steam turbine in synthetic ammonia production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210622874U true CN210622874U (en) | 2020-05-26 |
Family
ID=70761258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921579574.3U Active CN210622874U (en) | 2019-09-23 | 2019-09-23 | System for cleaning rotor during starting of steam turbine in synthetic ammonia production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210622874U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513161A (en) * | 2019-09-23 | 2019-11-29 | 天脊煤化工集团股份有限公司 | In a kind of cleaning Ammonia Production when steam turbine starting rotor system and method |
-
2019
- 2019-09-23 CN CN201921579574.3U patent/CN210622874U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513161A (en) * | 2019-09-23 | 2019-11-29 | 天脊煤化工集团股份有限公司 | In a kind of cleaning Ammonia Production when steam turbine starting rotor system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104653296B (en) | Automation water wash system for gas-turbine unit | |
| CN205977285U (en) | Turbo -engine lube circulation cleaning system | |
| CN210622874U (en) | System for cleaning rotor during starting of steam turbine in synthetic ammonia production | |
| CN213793058U (en) | Online descaling system based on steam turbine superheated steam admission | |
| CN217652903U (en) | Device for cleaning coagulation pump filter screen on line | |
| JP3950835B2 (en) | Filter cleaning mechanism in groundwater circulation system | |
| JP3451459B2 (en) | Underground seawater pumped storage power plant equipped with reverse osmosis seawater desalination equipment | |
| CN208534861U (en) | The online impeller cleaning system of centrifugal air compressor in a kind of air separation unit | |
| CN209801595U (en) | Heat pipe mode phase change heat supply system | |
| CN110513161A (en) | In a kind of cleaning Ammonia Production when steam turbine starting rotor system and method | |
| CN111810844A (en) | Efficient steam drainage collecting and recycling system and using method thereof | |
| CN208054953U (en) | A kind of vacuum evaporation equipment | |
| RU2429436C2 (en) | System of drainage cleaning | |
| CN206801839U (en) | A kind of combustion engine compressor blade cleaning device for adjusting flushing water pump outlet pressure | |
| KR100785175B1 (en) | Flood control system | |
| CN213865498U (en) | Decide online pipeline system that washes of cold water ion exchanger resin | |
| JPH09137437A (en) | Hydraulic power plant | |
| JP7492387B2 (en) | Oil-containing wastewater purification system | |
| CN220119358U (en) | Energy-saving type gas turbine combined cycle power plant boiler makeup water system | |
| CN212584736U (en) | Efficient steam drainage collecting and recycling system | |
| CN213831639U (en) | Steam car washer | |
| CN218954626U (en) | Automatic emptying pipeline system of intelligent car washer | |
| CN215808426U (en) | System for automatically adjusting water level of hot well during startup | |
| CN218608521U (en) | Separation equipment and compressor unit | |
| CN216518452U (en) | Anti-blocking device for sulfur foam pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |