Summary of CEEC activities:

- The company has two open and joint national scientific research platforms, two national energy investment technology research centers, three research and development platforms for power plant operation and maintenance.

- Non-destructive testing (Ultrasonic welding seam detection technology of stainless steel (dissimilar steel) - Comprehensive detection technology for heat transfer pipes of heat exchangers (can be used for steam generators, condensers, high and low pressure heaters and other transmission pipes Heat exchangers of various heat exchangers) - Comprehensive detection technology for corrosion of containers and pipelines - Ultrasonic fuzzy array detection technology for small and suitable pipe welds with a diameter of 19 mm or more and a wall thickness of 2 mm - Equipment and technology Cleaning the exterior of the pipeline, suitable for cleaning exterior materials and various types of equipment - Recordable ultrasonic testing technology (automatic) - Leak detection technology for the inner tube of buried double-walled pipe - Digital beam technology (CR DR) - Inspection technology Steam Turbine - Defective diagnostics of large caliber thick pipes and fittings and HDPE pipes - Furnace pipe detection technology - Thick wall coating peeling technology)

- Life assessment and management of aging (various methods of comprehensive analysis and testing to assess aging - Comprehensive analysis and testing methods to assess aging - Diagnosis and evaluation of aging Kabul - Monitoring and management of pipeline corrosion - Online strain and temperature monitoring - Biological Corrosion Monitoring and Corrosion Reduction Technology of Seawater Pipeline - Digital Factory)

- Performance testing and equipment monitoring (leakage testing, restraint testing and structural integrity testing - Test of thermal expansion, vibration and dynamic effects of pipelines and high energy equipment)

- Water wall surface repair technology

- Refueling services

- Special maintenance of equipment

- Industry training

- Technical services in the field of new energy

 

Introduction of National Power Plant Operation Service Technology Co., Ltd:

  1. Company Profile

The State Power Plant Operation Services Technology Company is a subsidiary of State Power Investment.

It was registered in March 2008 with a registered capital of 350 million yuan. A high-tech company with high technology, high quality personnel and strong emergency service capabilities to provide safety assurance and operation and maintenance services for the energy industry.

 The company is headquartered in the Oasis Science and Technology Park of the Shanghai Kaojing Technology Development Zone. The company has established research, development and testing bases in Qingpu Park, Zhangjiang High-tech Industrial Development Zone in Shanghai, and has a technical service guarantee base.

SNP Operation has two open and joint national scientific research platforms, two national energy investment technology research centers, three power plant operation and maintenance technology research and development platforms, and its subsidiaries, Shanghai Mucheng Engineering Supervision Co., Ltd., and Suzhou Tianhe China Power Engineering Technology Co., Ltd., is a joint stock company.

 "Technology Research and Development Laboratory" and "National Investment Robot Technology Research Center" have won 59 national and provincial science and technology awards, 56 licenses, 83 effective application patents and 46 computer software copyrights. Specialized technical service modes such as life guarantee, one-step delivery and menu-based selection. The core business fully covers thermal energy, hydropower, renewable energy, petrochemicals and other engineering in the construction, commissioning, production, and decommissioning industries at all stages.

  1. Overview of the main business scope

 The company has been actively developing and continuously improving the service life guarantee capabilities of the power plant (71 special technologies in five main areas). It has capabilities in non-destructive inspection, life assessment and aging management, refueling services, special maintenance, performance testing and equipment monitoring, and strong technical experience and service capabilities.

  1. Non-destructive testing: pre-service inspection and in-service inspection services for power stations; non-destructive testing technology and process development, service and consulting; non-destructive testing automation equipment development, production and sales.
  2. Life assessment and aging management: equipment life assessment; component material failure analysis; power plant aging assessment, analysis, management and material aging test; metal material physical and chemical inspection; operational safety assessment and optimization, etc.
  3. Performance test and equipment monitoring: power station performance test, equipment online inspection and monitoring, pipe system vibration and thermal displacement measurement, valve online monitoring and inspection, support and hanger system inspection, etc.
  4. Refueling service: loading and unloading simulator design and development, refueling process development and service, refueling training and service, fuel and control rod inspection and maintenance system development and service, etc.
  5. Equipment special repair and maintenance: heat exchanger and pipeline washing and foreign body pickup services; equipment testing, maintenance, repair, replacement and other technical development and services; power station overhaul services; special equipment and tools development for maintenance.
  6. Industry training: training of non-destructive inspection personnel for civil safety equipment, training of personnel related to power plant inspection and maintenance, etc.

3. Related core business

3.1 Non-destructive testing field

Always maintain China’s leading position in power plant life guarantee service technology, and become a model of domestic power professional services, providing technical services for 37 power units in operation in mainland China; at the same time actively exploring domestic and foreign markets, in the petrochemical field and the thermal power market has expanded to South America and Southeast Asia, serving 57 thermal power units both inside and outside the State Power Investment Corporation.

After years of technology precipitation, non-destructive testing technology has core competitiveness and provides customers with a number of customized solutions:

(1) Stainless steel (dissimilar steel) ultrasonic welding seam detection technology for coarse-grained materials, suitable for stainless steel (dissimilar steel) equipment and pipelines of various specifications and grades with a thickness of 150mm or less. The detection technology features: dual crystal longitudinal wave detection technology and phased array Detection technology, CIVA simulation technology to determine the optimal probe parameters, proficiency test block (simulating natural defects) process verification, signal recognition technology for related display determination, endpoint diffraction technology for defect height measurement, software calculation to achieve defect position correction, and automatic scanning Check to realize data recording and offline analysis.

(2) Comprehensive detection technology for heat transfer tubes of heat exchangers (applicable to steam generators, condensers, high- and low-pressure heaters and other heat transfer tubes of various heat exchangers):

Helium leak detection, high sensitivity, detection leak rate of at least 10-9Pa·m3/s, high detection efficiency, large area detection of dense heat transfer tubes, and sealing welding of heat transfer tubes, which can realize non-stop inspection Leaks, such as condenser heat transfer tubes.

Single-tube leak detection by differential pressure method: A combination of programmable controller and touch screen is used to automatically measure, analyze, calculate and control related data, and automatically calculate the relative leak rate of the tested part to achieve rapid detection. , Quickly judge whether the inspected piece exceeds the allowable standard value, and finally draw a conclusion whether the inspected piece is qualified. The advantages of detection technology: it can eliminate the influence of external factors such as temperature and volume deformation, high detection sensitivity, accurate and reliable results, and accurate positioning of leaking pipes.

Endoscope inspection: Industrial endoscope visual inspection is a non-destructive inspection method that uses industrial endoscopes to observe parts that are not easily observed by the human eye to achieve long-distance observation and inspection. It can detect the internal structure of components such as heat transfer tubes. And the state of the inner surface, and monitor, record, store and analyze the target image. Advantages: The endoscope objective lens has a large pixel size of 440,000; the probe is waterproof and oil-proof; has a 120° guiding function; high-intensity light source and advanced image processing to obtain static pictures and dynamic videos; a variety of specifications of probes and lenses can be replaced to meet different inspections Requirements; with phase measurement function.

Heat transfer tube eddy current testing: conventional eddy current testing technology, heat exchanger non-ferromagnetic heat transfer tube eddy current inspection, heat exchanger ferromagnetic heat transfer tube remote field inspection, special testing technology (rotating eddy current, array eddy current), etc.

Spiral heat transfer tube eddy current inspection: Realize the possibility of the spiral heat transfer tube on one side of the whole tube, the radius of curvature is 105mm, the inner diameter is 9mm; the formation of multi-zone noise measurement and analysis technology (NOS); the detection probability of multi-zone defects (POD), freedom Segment, support area, AVB area, etc.

Ultrasonic inspection of longitudinal welds in the expansion area: for the longitudinal welds of ferritic stainless steel heat transfer tubes with coarse grains; to solve the uneven inner wall of the weld, the influence of weld bead and spatter; the inspection area is located in the expansion area, and the tube sheet and expansion are excluded. The influence of the tube.

(3) Comprehensive detection technology for container and pipeline corrosion:

Guided wave detection technology: suitable for equipment, pipes and elbows of various specifications and brands, long detection distance: 300m, directional emission (forward, reverse, and two-way); 100% coverage, and simultaneous detection of internal and surface defects; efficiency High, no need to destroy the coating in a large area or excavate the pipeline in a large area; permanent installation: it is convenient to realize long-term online structural health monitoring.

Electromagnetic ultrasonic testing technology: It can detect cracks in pipes and water tanks, concave surfaces and corrosion, and high reliability: It can detect 1% cross-sectional loss to avoid missed detection; non-contact testing, the pipe surface does not need to be polished, and no couplant is needed (lifting up 3mm or so).

Magnetic flux leakage detection technology: suitable for straight pipe sections of various specifications and brands; multi-channel detection: the probe can cover 190mm in the circumferential direction at a time; high precision: it can distinguish micro-hole defects with a diameter of 1mm and a wall thickness of 20%.

Phased array ultrasonic testing technology: large-area high-resolution corrosion imaging operation; accurate drawing of images representing the thickness of the workpiece; rapid scanning of very large areas; data can be easily exported for future analysis.

Phased array corrosion (wear) profiling technology: phased array full-scale profiling of complex structures; corrosion (wear) morphology display; automatic scanning, data storage, and three-dimensional display.

(4) Ultrasonic phased array detection technology for small-diameter pipe welds, suitable for small-diameter pipe welds with a diameter of more than 19mm and a wall thickness of 2mm.

(5) Equipment and pipeline foreign matter cleaning technology, suitable for foreign matter cleaning of various types of equipment, pipelines and narrow spaces; underwater (15m) video inspection and foreign matter (including discrete foreign matter) grabbing in pools; narrow spaces (3.8~10mm); steam turbines Video inspection of blades and foreign body grabbing, etc.

(6) Recordable (automatic) ultrasonic testing technology: use automatic or semi-automatic scanners with two-dimensional encoders to scan the welds to be inspected, integrate position information with ultrasonic signals, and use special software for data Display, realize the whole-process recording and display of ultrasonic test data, effectively reducing the influence of personnel factors on test results.

(7) Leakage location technology for buried double-wall pipe inner pipe: leak detection is carried out by injecting tracer gas into the double-wall pipe interlayer and pressurizing it. When there is a leak in the inner pipe, it will be displayed under the effect of pressure difference. The tracer gas will leak into the inner tube; on the side of the inner tube, the concentration and gas flow of the tracer gas are measured by the inhalation probe and the mass spectrometer, and the software calculates the leak rate and location of the leaking point. High positioning accuracy.

(8) Digital ray technology (CR DR), digital ray inspection technology is a ray inspection technology that can obtain digital inspection images; digital ray technology (cold cathode) is suitable for butt joints and socket welds of pipes with a transillumination thickness of 18mm or less, The equipment is light, small, easy to carry, convenient for on-site use, fast imaging, real-time display of results, image sensitivity is generally 1-2 levels higher than the standard requirements, high safety, low environmental dose rate, and small isolation boundary range.

(9) Steam turbine inspection technology: suitable for the inspection of preventive maintenance of various types of steam turbines. Conventional/electromagnetic surface wave inspection of blade body, phased array ultrasonic inspection of blade root, automatic inspection of rotor center hole (visual, eddy current, ultrasonic), phased array ultrasonic inspection of butt welds of large shafts, etc.

(10) Large-caliber ultra-thickness and HDPE pipes and pipe fittings defect detection, developed thick-walled HDPE (high-density polyethylene/plastic pipes) and electrofusion hot-melt joint ultrasonic inspection technology, automatic ultrasonic inspection device and defect imaging system.

(11) Furnace tube detection technology: The furnace tube automatic detection technology independently developed by China National Corporation has been put into industrial applications, and a complete set of program customization, process research and development, mechanical design, and on-site implementation have been established according to customer product testing needs. ability. The inspection techniques used include ultrasonic testing, eddy current testing and liquid penetration testing, which have successively provided guarantee for the smooth operation of petrochemical companies such as Shanghai Jinshan Petrochemical, Caohejing Chemical Plant, Nanjing Yangzi Petrochemical, Shandong Qilu Petrochemical and other petrochemical companies.

Manual inspection of furnace tubes and process pipelines: including ultrasonic inspection of pipe butt weld contact method; local water immersion inspection of furnace tube base material; furnace tube reflection method inspection and penetration method inspection;

Vertical furnace tube automatic detection: automatic detection device crawls along the outside of the furnace tube, applicable pipe diameter range: 110mm-150mm in diameter; comes with a water collection circulation system to ensure that the furnace is dry; realizes high-speed scanning and improves maintenance efficiency;

Furnace tube eddy current testing: suitable for pre-service and in-service testing of base materials of various centrifugal casting furnace tubes; it can detect internal and external wall defects of the tube, and has a high detection sensitivity for internal surface defects; the detection speed is fast and the data can be saved.

(12) Thick-walled container surfacing layer peeling detection technology: suitable for the surfacing layer peeling inspection of thick-walled containers with a diameter greater than Ф2000mm, especially suitable for random inspection and follow-up inspection of the surfacing layer peeling area; intuitive to the inspected surfacing layer peeling area Imaging. It can realize spot inspection and patrol inspection in a certain area, and meet the needs of power plant, petrochemical, coal chemical industry and other fields of thick-walled container surfacing layer peeling inspection.

The scanning speed is adjustable. Light weight (9kg), convenient on-site installation and convenient transportation; scanning range: 950mm×950mm, scanning time is less than 10 minutes; real-time data storage, offline analysis, data traceability; defect shape drawing, area calculation, and intuitive inspection results; The system is remotely controlled, the software man-machine interface is friendly, and the operation is convenient.

3.2 Performance test

The operation of China National Corporation is in the leading position in China and the world's first-class level in the field of power performance test technology.

3.2.1 Containment leak rate test and structural integrity test

It is the only company in China to undertake ILRT/LLRT tests for concrete containment and steel containment. The steel containment structure integrity test and measurement system and the overall tightness test and measurement system developed for the first time in the domestic containment test field have realized the full-process automatic collection of all measurement parameters, and have real-time comparison analysis, abnormal state alarm and other functions. Moreover, the system is temporarily deployed, which reduces the cost of power plant operation and maintenance, and has reached the international advanced level after expert appraisal.

3.2.2 Thermal expansion, vibration and dynamic effects (TEDEV) test of high-energy pipelines and equipment

It can verify whether the installation and support of safety-related high-energy pipelines and equipment meet the requirements; verify that the expected steady-state or transient-induced displacement will not produce excessive stress and fatigue.

Through independent research and development, the National Corporation has developed a high-energy pipeline thermal expansion, dynamic effects and vibration (TEDEV) test system, breaking the foreign technology monopoly on the distributed acquisition and analysis system of the super large channel of power plants, and greatly reducing the TEDEV test carried out by domestic power plants. It has comprehensively mastered the analysis and evaluation technology of high-energy pipeline TEDEV test, and improved the ability of domestic high-energy pipeline test, analysis and evaluation. It is in the leading position in the industry and has become one of the few domestic and foreign companies with TEDEV test capabilities.

3.3 Life assessment and aging management business

National Corporation has inspection, monitoring and aging state assessment technology for power plant equipment and pipelines, pipeline corrosion detection and management capabilities, seawater pipeline microbial corrosion monitoring and mitigation technology, advanced active aging management technology, pipeline vibration and valve leakage test bench, power plant aging management information visualization system and aging management information system for inspection.

China National Corporation has the conventional test capabilities for chemical and mechanical properties of materials, such as electrochemical workstations, ferrite meters, salt spray testing machines, tensile machines, impact testing machines, etc., as well as scanning electron microscopes, corrosion fatigue circuits, and high temperature High-voltage circuits, etc., have formed a unique service ability to study the aging mechanism and aging state of materials under extremely harsh working conditions.

China National Corporation has configured a dedicated management team for laboratories and equipment, formulated a systematic management system, and obtained DLAC laboratory accreditation and CMA certification. Over the years, the State Power has been deeply involved in major power plants across the country, conventional power plants and chemical plants in Shanghai and surrounding areas, and expanded its business areas to Jiangxi and other provinces. Provide physical and chemical inspection, failure analysis and aging management services for owners. Two major brand service capabilities have gradually formed, namely, on-site physical and chemical inspection of metal materials and aging management of hydrogen production furnaces and reformer tubes in chemical plants.

(1) Comprehensive analysis and test methods for material aging assessment include:

Metallographic microscopic analysis: It can analyze materials such as carbon steel, CrMo steel, stainless steel, HK40 steel, HP40 steel, 304H, 316L, dual-phase steel, etc.;

Scanning electron microscopy and energy spectrum analysis;

Mechanical performance test (normal temperature and high temperature);

Corrosion test (salt spray, electrochemistry, stress corrosion; normal temperature, high temperature, water environment); ferrite content analysis; in-situ temperature and strain measurement, etc.

(2) Physical and chemical inspection

Metal materials and products (mechanical properties): room temperature tensile test, impact test, hardness test;

Metallic materials and products (microstructure): microstructure inspection and rating, grain size, spheroidization level, microscopic morphology, composition plane distribution, intergranular corrosion, etc.

(3) Cable aging detection and evaluation

Realize aging status tracking through on-site condition monitoring, multi-factor aging model construction and life evaluation, evaluate the aging status and remaining life of important cables, optimize maintenance and replacement plans, based on preliminary tests, have established a combination of accelerated thermal aging, humidity, heat, and irradiation Aging test technology and model; cable aging database, used to support the management of cable aging status, carry out trend analysis and tracking; can be used to find defects in time, comprehensively evaluate cable status, predict remaining life, and ensure the reliability of important power and instrument control cables.

(4) Pipeline corrosion monitoring and management

Including three aspects of on-site non-destructive testing, physical and chemical testing, and online monitoring, and a full-process service integrating testing, analysis and management; through various on-site monitoring methods to grasp the pipeline status and degradation trends, guide inspection and maintenance, and reduce failure risks. With complete testing methods, evaluation technology, and management software development technology, it can carry out a full range of inspection, evaluation, and management services including thermal power, hydropower, pressure pipelines, buried pipelines, raw water/fire-fighting water pipelines, and small branch pipes.

Long-term undertaking of pipeline corrosion monitoring and management program and software development in various aspects of petrochemical, chemical, hydropower, etc., including on-site metallographic, hardness and mechanical performance testing; guided wave, metal magnetic memory, hysteresis loop, phased array , Internal visual inspection and other non-destructive monitoring; passive environmental monitor, microbial film monitoring and other environmental monitoring; FFS evaluation of local defects.

(5) Online monitoring of strain and temperature

Through the principle of optical fiber Rayleigh scattering, temperature and strain are measured in situ, which is suitable for various scenes from pipelines to large-scale structural parts and special-shaped structural parts.

Strain and temperature online monitoring technology can carry out on-site and laboratory tests; when combined with digital workshops, the temperature and strain of equipment and plant structures can be displayed in real time, and coupled to the equipment three-dimensional model or photos; working temperature up to 500 ℃; Yes Achieve millimeter-level spatial resolution (equivalent to one measuring point every 5mm); the repeatability of strain measurement can reach ±5με, and the repeatability of temperature measurement can reach ±0.2 ℃.

(6) Seawater pipeline biological corrosion monitoring and mitigation technology

Through microbiological corrosion monitoring; optimization of agent addition; active prevention of microbial corrosion technology, etc.

(7) Digital Factory

Three-dimensional laser scanning can be used to realize the installation and positioning of the factory’s equipment, analyze the entry and exit paths, and truly reflect the spatial structure of the device\pipeline\equipment; use 3D virtual simulation technology to truly reproduce the space environment of the plant and equipment for equipment management, personnel training, Maintenance training and program verification provide an immersive environment, which can effectively reduce the working time of staff in high-risk environments.

China National Corporation has formed a set of service plans for aging management recommendations, aging state testing and analysis, and remaining life assessment. The program can be extended to rail transit, chemical and conventional power plants. Aging management for systems, components, and structures.

3.4 Vibration test of pipeline/piping system

There are a large number of rotating equipment related to safe operation in power plants, such as pumps, motors, etc. The vibration of the equipment not only affects its own service life, but also causes vibration of pipelines or other equipment. Vibration testing and fault diagnosis are extremely important.

National Corporation has accumulated a wealth of engineering practice experience in vibration testing and data analysis of rotating equipment, fault diagnosis of rotating equipment, analysis of vibration and noise exceeding standards, vibration control solutions, rotor dynamic balance solutions, etc., which can solve a series of pipeline vibrations. problem.

3.5 Water wall surfacing repair technology

Use automatic welding method to surfacing corrosion-resistant and wear-resistant materials on the outer surface of water-wall tubes in waste power plants, thermal power plants, etc. After surfacing, the abrasion resistance of water-wall tubes is significantly improved, the exposure rate is reduced, and the service life is changed from the original the extension of the 2 years to 5 years reduces unplanned shutdowns of units and increases the boiler load rate.

3.6 Technical Services in the New Energy Field

In the fields of new energy such as photovoltaics and wind power, the National Corporation has taken full advantage of power plant operation and maintenance technology and robotics, and actively carried out photovoltaic inspection drones, photovoltaic cleaning robots, wind turbine blade inspection drones, and wind turbine tower wall climbing inspections/ Technical development, product sales and technical services such as cleaning robots, remote online monitoring systems for key components of wind power.

  1. non-power station customer service experience

4.1 In the past 10 years, it has provided nearly 200 technical services for the upstream and downstream industrial chain each year, involving equipment manufacturing, petrochemical industry and research institutes, etc.; such as Shanghai No. 1 Machine Tool Plant, Shanghai Special Inspection Institute, Shanghai Heavy Machinery Plant, Shanghai Kaiquan Pump Industry (Group) Co., Ltd., Institute of Metal Research, Chinese Academy of Sciences, China First Heavy Machinery Manufacturing Co., Ltd., Chongqing Materials Research Institute, Shanghai Petrochemical, Atlas Copco (shanghai) Process Equipment Co. Ltd, Covestro Polymerization Chemicals (China) Co., Ltd., Roquette (China) Fine Chemicals, Waigaoqiao Power Plant, Caojing Power Plant, Shidongkou Power Plant, Wujing Power Plant and other conventional power plants, as well as chemical companies such as Jinshan Petrochemical, Qilu Petrochemical, and Yangzi Petrochemical technical services.

4.2 Overseas customer business

National Operations is committed to the development of overseas markets. In 2016, National Corporation signed a data analysis technical support agreement with Swedish Sandvik Company, and implemented a beneficial attempt to "go global" for National Corporation's operations.

The maintenance decision analysis technology was successfully implemented in 2018 and was successfully applied to the state assessment work of the pressure pipes of the Pangal, Coya and Hlh hydropower stations of Pacific Hydropower Corporation, which saved the customers a large amount of replacement and maintenance costs and carried out the metal supervision work of Vietnam's Yongxin Thermal Power Plant. And promote the establishment of a long-term partnership with SPIC overseas companies.