Service Scope: Steam Turbine spare parts supply; steam turbine installation, inspection & overhaul, technological upgrading, turbine technology training, turbine low oil pressure renovation, turbine rotor shaft bend restoration, lower turbine`s vibration and noise, remove speed governing system abnormal volatility or load swing, solve turbine insufficient output, discontent load or other common/exceptional faults.
Contract to overhaul and all kinds of turbine`s remould, turbine dynamic balance and so on, for satisfying practical operation requirements.
Provide technical support and service for operation, inspection, maintenance, accident treatment and so on.
1. Steam Turbine Maintenance/Overhaul Service
Steam turbine normal overhaul, failure treatment; main body components repair, heat exchange tubes of cooler replacement and so on.
2. Technical guidance
Generating or Industrial driving turbine inspection, overhaul, upgrading and other items technical guidance.
3. Thermodynamic System Optimizing Services
For operating or planning projects or equipment, according to end users` actual CHP(or heat-work cooling) requirements, make cycle efficiency analysis, provide system optimizing service.
4. Speed Governing System Remould
Upgrade old hydraulic governing system to digital electro-hydraulic governing system, satisfy flexi-ble configuration all kinds of control strategy requirement.
5. Flow Passage Optimization and Modification
Total modification for steam turbine shall increase old turbine`s economic efficiency with advanced technology, service life also shall be extension.
6. Turbine Parameters Remold and Modification
Apply to processing or procedure transformation (or project site change) cause turbine operation parameters` change.
7. Uncontrolled extraction steam reconstruction
Consideration of turbine security and economic, open a hole for extraction steam normally in order to heat supply reformation.
8. Steam Turbine Engineering Service
Provide small & middle size Steam Turbine Generator or industrial steam turbine complete set engineering, project design and project installation service.
9. Vibration Analysis and Rotor Dynamic Balance
24Hours Service for emergency vibration analysis and wide range rotor dynamic balance service at project site or back to factory.
10. Condensing (extraction condensing) type remodel to back pressure type
Condensing (extraction condensing) steam turbine remodel to back pressure steam turbine
11. Steam Turbine Vacuum System Upgrade
Condenser three-dimension design and upgrade, reduce heat-transfer temperature difference, increase steam exhaust vacuum degree, improve turbine economic efficiency. Water cooling remodel to air cooling.
12. Steam Turbine Enlargement Capacity Reconstruction
Reconstruct the turbine`s capacity which are caused by system or equipment changing.
13. Motor Speed Governing Variable-frequency Remould
Variable-frequency drive remould for pump systems of all kinds of industrial and mining enterprises.
14. Domestic Equipment Reconstruction
Domestic equipment reconstruction for imported turbine
15. Circulating Cooling Water System Optimization and Modification
Optimization and modification of operating circulating cooling water system, reduce operation energy consumption rate.
16. Waste Heat Steam Turbine Gland Seal System Upgrade
After upgrade, steam leakage ( effect gear box oil quality) shall be improved by the reason of waste heat parameters are not stable.
17. Spare Parts Marketing
Normal easily damaged parts warehouse, shorten delivery time.
Case 1
A fertilizer company has 2 sets of steam turbine, model are: CB6-3.43/1.27/0.294 and CB6-3.43/1.17/0.294. Because end user`s power load and steam consumption are changed, the turbines must be reconstructed according to steam parameters, flow change and guarantee high efficiency.
Remould Parameters: turbine max. inlet steam is 100t/h, when inlet steam is 97t/h and inlet pressure is 3.15MPa(g), its extraction steam is 62t/h extraction pressure is 1.51MPa(g), exhaust pressure is 0.21MPa(g), guarantee output is 5800KW (deviation±5% ).
Main job of remould and overhaul:
1. Casing was sent back to manufacture`s factory for rebuilding 2 valve seat hole, expand nozzle block steam passage.
2. Change nozzle block, take out guide blade carrier.
3. The original double row governing stage impeller and blade was changed to single row governing stage impeller and blade, add governing stage sheath, parts of rotor sleeve need to be changed and adjusted.
4. LP stage 3rd diaphragm steam passage inspection optimization.
5. Casing and rotor dismounting and assembling in factory with comprehensive inspection.
6. Rotor low speed dynamic balance test.
7. Governor static test in factory, overspeed test.
8. Dismount & assembly, overhaul at project site.
9. Clear incrustation for steam governing valve, nozzle and blade.
10. Gland seal inspection and replacement, gland sealing clearance adjustment, change the seal block which was severe wear, spring leaf which are damaged should be changed.
11. Every bearing repair and adjust.
12. HP & LP governing steam valve grinding, stroke adjustment.
13. Front bearing pedestal dismounting and inspection, patch oil leaking points.
14. Inspection and patching steam leaking of HP steam governing valve link rod.
15. Turbine mainbody troubleshooting.
After remolding is complete, the 2 turbine sets are running very well.
Case 2
There is a paper mill which has a set of steam turbine: B6-3.43/0.981. Due to processing consumption in workshop and load were changed, the end user request reset new back pressure and achieve the best efficiency within the shortest time.
Parameters reform to: when rated inlet flow: 55t/h, inlet pressure: 3.43±0.2MPa(a), exhaust pressure: 0.59MPa(a), steam rate guarantee value must be 11.65kg/(kw·h), output power must be 4700KW under rated working condition. The reconstruction project is a turnkey project, from preparing components to dismount heat material, equipment dismounting and installation, till to equipment commissioning successfully.
For reducing the work amount, keep casing and pipelines still, main jobs are following:
1. Change front & rear gland seal and diaphragm seal.
2. Change main shaft assembling (keep mail oil pump and coupling still).
3. Change HP nozzle block, HP guide blade carrier and original 2 stage diaphragm, add 3 stage diaphragm, 5 stage diaphragm adopts special design for satisfy the requirement.
4. Change the original 3 stage impeller and add another 3 stage impeller.
5. Steam governing valve link rod adjust inlet steam, check all butterfly valves matching conditions, improper ones should be changed.
6. Original rotor`s coupling, MOP shall be mounted in new rotor.
7. Rotor balance.
8. Change sylphon of governing system.
9. Change pressure transducer sleeve, adjust hydraulic servo-motor stroke.
10. Governor static test in factory.
11. Clear oil system.
The reconstructed steam turbine is B4.7-3.43/0.59, end user evaluates steam rate, vibration, exhaust temperature very strictly, but the reconstructed steam turbine is running very well and fully meet the design performance.
Steam Turbine Care,Steam Turbine Services Shandong Qingneng Power Co., Ltd. , https://www.steamturbine.be
In October of this year, the “Management Regulations on Recall of Defective Automotive Products†(hereinafter referred to as the "Recall Management Regulations") was implemented for one year. The General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China announced the "Annual Report on the Implementation of Recall Management Regulations on Defective Automotive Products" (hereinafter referred to as "Report") shows that the recall effect has achieved the desired goal.
In the past year, a total of nearly 340,000 vehicles were recalled domestically on March 15 last year. The "Regulations on the Recall of Defective Automobile Products" was promulgated and it was announced that this administrative regulation will be implemented on October 1 this year. The "Report" shows that from March 2004 when the "Recall Management Regulations" was formally promulgated to September 2005, 21 domestic and foreign automakers have implemented 29 voluntary recalls involving 33 types of vehicles and 339,696 vehicles.
In recent years, the public safety problems caused by the entry of defective products into the market have become the focus of public concern. To ensure the implementation of the "Recall Management Regulations," the AQSIQ has formulated four methods involving supporting identification of defective products, information management, expert management and inspection agency management, and established the AQSIQ Defective Product Management Center. A database of experts on defective automotive product recalls was established, 11 testing agencies were approved to undertake technical inspection and experimental tasks for defective automotive products, and a defect product recall information system was initially established.
The recall report achieved the expected goal “Report†shows that “recall management regulations†have been implemented for a year. Most car manufacturers have set up a special management department, established a product quality traceability system, and further improved the quality management system, from the design and manufacturing process. Strengthen the control of product defects, and improve the quality and safety performance of automotive products. Nearly 340,000 defective vehicle recalls have safeguarded the legitimate rights and interests of consumers, improved the protection of the public's life and safety, and deepened the community's understanding of defective vehicle recall systems.
As of September this year, 10 companies have completed the recall plan and submitted a recall summary report to the AQSIQ. Defective product management centers have successively launched recall evaluations. Currently, three companies have completed assessments. From the perspective of recall results, all three companies completed the recall plan on time, with a recall rate of over 80%. Consumer satisfaction was over 94%, and the recall effect reached the expected target.
It is understood that after the implementation of the "Recall Management Regulations," most companies have established a decision-making body for defective vehicle recalls, and special personnel are responsible for the communication and coordination of information with the competent authorities. At the same time, the owner's information file system, complaint information collection and feedback processing system (complaint center), quality information decision tracking system, VIN system, etc. are generally established. Some companies conduct a recall risk assessment at the design stage to perform early prevention of the most likely defects. Some companies have already achieved quality traceability from the supply of spare parts to the entire vehicle production process. Once quality problems occur in parts and components, they can be accurately traced back to the responsible parties, determine the scope and causes of defects, and ensure the timely and accurate elimination of product defects.
Car manufacturers generally establish and improve the user complaints system so that customer service work can not only help consumers solve problems, but also provide an important channel for discovering product defect information. In accordance with the requirements of the "recall management regulations," auto manufacturers generally provide "defect report on auto products" to dealers and maintenance companies all over the country, and provide the report blank form to vehicle owners through the on-board documents to ensure that after-sales service institutions and consumption Able to report possible defect information, so that the competent authorities can promptly identify defects and take effective measures to ensure public safety.
Recall management will be further strengthened. For the future, the “Report†proposes that AQSIQ will further strengthen the recall management of defective automotive products.
The management of M1 (car) car recalls will be further strengthened. The focus will be on strengthening the management of information filing by manufacturers, expanding the channels for collection of defects and complaint information, and learning, researching and exploring more defect investigation techniques and methods. Solve the problem of incomplete owner information in sedan product recall management. On the one hand, it is recommended that through its own after-sales service system, it is necessary to strengthen the collection and arrangement of user information for in-use vehicles, keep abreast of user dynamics, and update user information in a timely manner. On the other hand, it will also strengthen the collection and organization of vehicle owner information through relevant channels for defect investigation and service to enterprises.
According to the work plan of the General Administration of Quality Supervision, Inspection and Quarantine, by the end of this year, M2 and M3 vehicles (more than 9 passenger cars) will be included in the scope of recall management. The current focus is on in-depth investigations and research to understand the characteristics of M2 and M3 vehicles in design, manufacturing, product support, quality management, information collection and after-sales service, in order to formulate more scientific and reasonable management measures.
In addition, a feasibility study was conducted on the recall management of N-type vehicles and other automotive components. Focus on understanding the basic conditions of the relevant industries, and study their production and product characteristics, use of the environment, technology and service levels. When the time is ripe, these products will be gradually included in the scope of recall management.