CN112983571A - Optimized desalting and descaling method for steam turbine rotor - Google Patents
Optimized desalting and descaling method for steam turbine rotor Download PDFInfo
- Publication number
- CN112983571A CN112983571A CN202110176287.3A CN202110176287A CN112983571A CN 112983571 A CN112983571 A CN 112983571A CN 202110176287 A CN202110176287 A CN 202110176287A CN 112983571 A CN112983571 A CN 112983571A
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- China
- Prior art keywords
- rotor
- steam turbine
- desalting
- optimized
- turbine rotor
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- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000011033 desalting Methods 0.000 title claims abstract description 11
- 150000003839 salts Chemical class 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000004744 fabric Substances 0.000 claims abstract description 7
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- 230000007797 corrosion Effects 0.000 claims abstract description 5
- 238000005260 corrosion Methods 0.000 claims abstract description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000012423 maintenance Methods 0.000 claims abstract description 5
- 229920000742 Cotton Polymers 0.000 claims abstract description 4
- 239000010687 lubricating oil Substances 0.000 claims abstract description 4
- 238000000053 physical method Methods 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims abstract description 3
- 230000001050 lubricating effect Effects 0.000 claims abstract description 3
- 238000010926 purge Methods 0.000 claims description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 244000137852 Petrea volubilis Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
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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
- F01D25/002—Cleaning of turbomachines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/14—Wipes; Absorbent members, e.g. swabs or sponges
- B08B1/143—Wipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- 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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses an optimized desalting and descaling method for a steam turbine rotor, which comprises the following steps: s1, adjusting the pressure to a proper pressure by using a high-pressure water gun through a physical method, and enabling salt scale on the surface of the rotor to fall off through high-speed impact of high-pressure water and the surface of the rotor of the steam turbine; s2, drying the rotor by using a blower to prevent the rotor from being rusted; and S3, finally, wiping the fabric with cotton cloth with lubricating oil to achieve cleaning, lubricating, corrosion preventing and rust preventing maintenance. The invention aims to provide an optimized desalting and descaling method for a steam turbine rotor, so as to achieve the purpose of removing salt scale on the steam turbine rotor while reducing damage to equipment.
Description
Technical Field
The invention relates to an optimized desalting and descaling method for a steam turbine rotor.
Background
The steam-driven blower and the generator of the blast operation part of the steel-clad strand power supply main plant can generate partial corrosion due to salt scale or silicide deposited on the surface of a steam turbine rotor and in a groove under the influence of the quality of boiler steam, the efficiency and the steam consumption of the steam turbine are reduced, the pressure drop of steam flow passing through a partition plate and blades is increased due to the scaling, the reaction degree of working blades is increased accordingly, the vibration of a unit is abnormal, and the partition plate and a thrust bearing can be overloaded by serious persons, so that the rotor is damaged, and the parts of the steam turbine are damaged. Brings adverse effect to the safety production, and influences the power generation of a generator and a blast furnace blower or the stable air supply of the blast furnace, thereby causing huge economic loss.
At present, most industrial steam turbine rotors in China generally have the conditions of salt deposition, scale formation and rust formation. The general descaling method for the rotor of the steam turbine is divided into two main categories. Firstly, descaling by a chemical method and preparing a specific chemical agent; and secondly, descaling by using a physical method, and manually removing by using mechanical tools such as sand blasting, grinding wheels, sand paper or metal scrapers, flat shovels and the like. Chemical agents in the chemical method can corrode a rotor machine component of the steam turbine to a certain extent, and the steam turbine can be damaged. In the second method, the blades and the rotor are seriously damaged due to inaccurate manual control force during physical descaling. And the gap of the groove is very narrow, so that workers and tools are difficult to enter, and partial scale is difficult to clean.
Disclosure of Invention
The invention aims to provide an optimized desalting and descaling method for a steam turbine rotor, so as to achieve the purpose of removing salt scale on the steam turbine rotor while reducing damage to equipment.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to an optimized desalting and descaling method for a steam turbine rotor, which comprises the following steps:
s1, adjusting the pressure to a proper pressure (200-;
s2, drying the rotor by using a blower to prevent the rotor from being rusted;
and S3, finally, wiping the fabric with cotton cloth with lubricating oil to achieve cleaning, lubricating, corrosion preventing and rust preventing maintenance.
Further, in step S2, the strict purging operation is performed 2 times.
Compared with the prior art, the invention has the beneficial technical effects that:
1. the invention is based on the traditional industrial steam turbine rotor desalting and descaling method, improves the process and the material, changes the grinding material into water, is very convenient, reduces the damage to equipment and effectively removes salt scale.
2. The invention has simple operation, reliable work, easy implementation, convenient maintenance and prolonged service life of equipment. Through adjusting suitable squirt pressure, realize the washing to different rotors, the adaptability is stronger.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is a flow chart of the optimized method for removing salt and scale of the turbine rotor of the present invention.
Detailed Description
A turbine rotor optimized desalting and descaling method comprises the following steps of cleaning with high-pressure water by adjusting proper pressure to remove salt scale on the surface, wherein the working principle is as follows: the salt scale on the surface of the rotor is fallen off by utilizing the high-speed impact of high-pressure water and the surface of the steam turbine rotor; as shown in fig. 1, the specific descaling process is as follows:
firstly, a physical method is utilized, a high-pressure water gun is adopted, and the pressure is adjusted to be proper (200 and 300 kilograms), so that salt scale in narrow groove gaps can be removed conveniently, and the steam turbine rotor cannot be damaged.
Secondly utilize the hair-dryer to weather the rotor, strictly sweep the operation 2 times, prevent to cause the rotor corrosion.
Finally, the cotton cloth with the lubricating oil is used for wiping, so that the cleaning, the lubrication, the corrosion prevention and the rust prevention maintenance are realized.
The steam turbines of the steam blowers and the generators of the blast operation department of the steel-clad strand power supply main plant effectively solve the problems of desalting, descaling and derusting of the rotors by using the method and create a prerequisite for safe production. The failure time of a blast furnace blower and a turbonator is reduced, the steam consumption is reduced, and the efficiency of a steam turbine is improved, so that the cost is reduced, and the benefit is created. After the invention is used by 3 blast furnace blowers (generators), the average steam consumption of each blower is reduced by about 0.32 ton, and each blower operates for about 8000 hours every year. The steam cost is saved each year: 3 × 0.32t × 8000 h × 3.318GJ/t × 25.3 gyuan/GJ ═ 64.47 ten thousand yuan. The influence on blast furnace steelmaking is particularly great.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (2)
1. An optimized desalting and descaling method for a steam turbine rotor is characterized by comprising the following steps:
s1, adjusting the pressure to 200 and 300 kilograms by using a high-pressure water gun by using a physical method, and enabling salt scale on the surface of the rotor to fall off by using high-speed impact of high-pressure water and the surface of the rotor of the steam turbine;
s2, drying the rotor by using a blower to prevent the rotor from being rusted;
and S3, finally, wiping the fabric with cotton cloth with lubricating oil to achieve cleaning, lubricating, corrosion preventing and rust preventing maintenance.
2. The method for optimizing the salt and scale removal of a steam turbine rotor as claimed in claim 1, wherein said step S2 comprises 2 strict purging operations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110176287.3A CN112983571A (en) | 2021-02-07 | 2021-02-07 | Optimized desalting and descaling method for steam turbine rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110176287.3A CN112983571A (en) | 2021-02-07 | 2021-02-07 | Optimized desalting and descaling method for steam turbine rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112983571A true CN112983571A (en) | 2021-06-18 |
Family
ID=76394309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110176287.3A Pending CN112983571A (en) | 2021-02-07 | 2021-02-07 | Optimized desalting and descaling method for steam turbine rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112983571A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100243001A1 (en) * | 2009-03-30 | 2010-09-30 | Gte Turbine Efficiency Sweden Ab | Turbine cleaning system |
| CN206981317U (en) * | 2017-04-12 | 2018-02-09 | 安徽誉特双节能技术有限公司 | Turbine rotor automatic cleaning apparatus |
| US20180236503A1 (en) * | 2015-12-28 | 2018-08-23 | Mitsubishi Hitachi Power Systems, Ltd. | Turbine blade maintenance method |
| US20190292938A1 (en) * | 2016-10-14 | 2019-09-26 | General Electric Company | Gas turbine engine wash system |
-
2021
- 2021-02-07 CN CN202110176287.3A patent/CN112983571A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100243001A1 (en) * | 2009-03-30 | 2010-09-30 | Gte Turbine Efficiency Sweden Ab | Turbine cleaning system |
| US20180236503A1 (en) * | 2015-12-28 | 2018-08-23 | Mitsubishi Hitachi Power Systems, Ltd. | Turbine blade maintenance method |
| US20190292938A1 (en) * | 2016-10-14 | 2019-09-26 | General Electric Company | Gas turbine engine wash system |
| CN206981317U (en) * | 2017-04-12 | 2018-02-09 | 安徽誉特双节能技术有限公司 | Turbine rotor automatic cleaning apparatus |
Non-Patent Citations (2)
| Title |
|---|
| 刘世浩: "汽轮机结垢分析及应对措施", 《石油化工技术与经济》 * |
| 刘尚贤: "高压水射流技术在火电厂中的应用", 《四川电力技术》 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210618 |
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| RJ01 | Rejection of invention patent application after publication |