Jiangsu Nanjing Garbage Incineration Power Plant in North Venous Industrial Park

“West east gas transmission” Shanghai natural gas trunk pipeline network system project

Shanghai Xizang Road Electric Power Cable Tunnel

Shanghai Pudong Foreshore Natural Gas Decentralized Energy Project

Shanghai Middle Yanggao Road Electric Power Tunnel

Macao Onshore Natural Gas Input and Transmission System

12th-Five-Year Plan of Shanghai Gas Development

Hainan CNPC Shennan LNG Storage Project

Shanghai Tower Gas Drainage Pipe Project

Major Projects

Jiangsu Nanjing Garbage Incineration Power Plant in North Venous Industrial Park

Jiangsu Nanjing Garbage Incineration Power Plant in North Venous Industrial ParkJiangsu city Nanjing vein Industrial Park garbage incineration power plant

Business Section: Energy
Location:Nanjing, Jiangsu Province
Project Completion Date:March 2015
Participating Mode: Managing Contractor
Project Category: Garbage Incineration Plant

Jiangsu Nanjing Garbage Incineration Power Plant in North Venous Industrial Park is located in Pukou District in Nanjing and is called ‘Twin Plants’, together with Jiangnan Garbage Incineration Power Plant constructed during the same period. With the widespread public concern over waste incineration flue gas treatment, we innovatively adopted the flue gas purification process of ‘semi dry + dry + activated carbon injection + bag filter +SNCR’. For the leachate and other waste water, we adopted ‘slag pretreatment + anaerobic +MBR+RO’ process. Slag, which is waste incineration product, belongs to general solid waste and all the waste generated by waste incineration can achieve safe disposal. As a key project in infrastructure construction in Nanjing city, this is an important livelihood project that can promote integration of urban and rural life garbage disposal in the city and achieve zero harm, quantity reduction and resource fulfillment of domestic garbage. Thus, this project is crucial to improving the living environment of urban and rural areas and the overall standard of the whole city. After the completion, with daily treatment of municipal solid waste reaching 2,000 tons, Jiangbei Garbage Incineration Power Plant in Venous Industrial Park can help Nanjing digest nearly 1/3 of the domestic garbage.

Major Projects

“West east gas transmission” Shanghai natural gas trunk pipeline network system project

“West east gas transmission” Shanghai natural gas trunk pipeline network system project“West east gas transmission” Shanghai natural gas trunk pipeline network system engineering

Business Section:Energy
Location:Shanghai
Participating Mode:Design & Construction
Gas Transmission Scale:16 billion cubic meters / year

During the planning and designing stage of the“West east gas transmission” Shanghai natural gas trunk pipeline network system project, STEC perserved in overall planning and scientific selection. Considering the urban space layout, STEC has laid, from the outside to the inside, 6.0 MPa super high pressure natural gas pipe network along the suburban ring and 1.6 MPa high pressure natural gas pipeline network along the outer ring, with pressure levels decreasing gradually. This has created a successful model for the city’s safe supply of natural gas.

In terms of the design, in addition to meeting the gas demand of high pressure gas power plants and of high-altitude gas use in super high-rise buildings, we have also successfully developed a number of invention patents and thus filled in the domestic gaps. During the construction, we promoted the "Four New " technology and have achieved a number of breakthroughs in pipe equipment selection, welding inspection, anti-corrosion technology and other aspects, by adhering to the concept of intrinsic safety in the pipeline. For complex construction sites such as the large transport hub and the uneven settlement areas, we actively implemented the innovation technology and have creatively applied new techniques such as combination through the pipeline and non-stop transmission implementation. For difficulties such as tight LNG station construction period and limited shoreline resources, we have not only saved the valuable shoreline resources but also ensured that the construction project runs safely and efficiently, by adopting the innovation in project construction mode, management in construction organization and planning and design in LNG berth. In the research and development process of science and technology, we carried out nearly a hundred overall topic studies, including planning, designing, construction management and so on, which has provided technical support and guarantee to the smooth implementation and safe operation in the project. Based on the summary of engineering construction experience, we have also drawn up ‘Technical Specification of City High Pressure and Super High Pressure Natural Gas Distribution Pipeline Engineering’ and ‘Design Code for LNG Emergency Peak-Shaving Station’, which has laid the foundation for revision of the national relevant fuel gas codes and again closed the domestic gaps.

Major Projects

Shanghai Xizang Road Electric Power Cable Tunnel

Shanghai Xizang Road Electric Power Cable Tunnel Tibet Shanghai road power cable tunnel

Business Section:Energy
Location:Shanghai
Project Completion Date: Feb. 2007
Participating Mode: Managing Contractor
Project Category:Electric Power Tunnel

Shanghai Xizang Road Electric Power Cable Tunnel is a major municipal civil engineering project, providing safe, stable and adequate power supply for the World Expo, together with Expo power cable tunnel. The project is located in the downtown area, with skyscrapers along the road. Underground soil structure is complicated, with various pipelines densely covered, crossing Suzhou Creek and metro equipment layer under construction along the way. In order to make the tunnel smoothly pass through the underground crack, we adopted three-dimensional control jacking optimization scheme. By using 350-meter curvature radius curve jacking technique, this project successfully avoided underground buildings and smoothly passed through No. 3 and No. 4 entrances and exits of the Metro Line 8 and the stations of Line 9 and Line 10 in operation. The nearest crossing distance is only 48 centimeters. In pipe jacking construction process, we used ‘complete construction technique for pipe jacking perturbation in a complex environment’ and made technical researches and improvement on the pipe jacking machine, slurry sleeve technology, micro disturbance control technology respectively as below: The lateral frictional resistance of the outer wall of the tube is controlled within 1KPA; 3500 mm-diameter pipe jacking excavates 1.3 km one time; the deviation after linking up is less than 5 cm. While ensuring the linking of interval tunnels, we met the target of small disturbance to the surrounding environment. Also, this project was given the golden award of Shanghai Municipal Engineering Award, first prize of QC Outstanding Achievements in Gas Industry and in Shanghai Municipal Engineering and QC Group Award for Best Results in Shanghai Municipal Engineering Construction. The construction of Xizang road electric power cable tunnel is the main tunnel to connect Shanghai city center and expo power cable tunnel.

Major Projects

Shanghai Pudong Foreshore Natural Gas Decentralized Energy Project

Shanghai Pudong Foreshore Natural Gas Decentralized Energy ProjectShanghai Pudong foreshore natural gas distributed energy projects

Business Section: Energy
Location: Shanghai
Project Starting Date:April, 2015
Participating Mode: Managing Contractor
Project Category:Energy Station

Shanghai Pudong Foreshore Natural Gas Decentralized Energy Project is located in foreshore area 56-01 plot, along Huangpu River’s south extension. The total construction area is 20,750 square meters, with 10,800 square meters above the ground and 9,950 square meters under the ground. This super large urban complex of commerce and residence adopts the natural gas decentralized energy system in an area of 420,000 square meters. Compared to the normal centralized system, this decentralized system is more energy-efficient, cleaner, more economical and safer. STEC has contracted this project and innovatively used natural gas as fuel. With the help of two 345 kilowatts gas internal combustion engine generating sets and their supporting facilities and one 1,800 kilowatts domestic gas turbine demonstration platform, we provided cooling and heating air conditioner with high quality and reliability near the load center, through the new energy supply technologies such as the combined cooling, heating and power system as well as energy storage. The project’s comprehensive energy utilization rate reaches more than 70%. Compared with the traditional cold and heat source and electric energy dispersion, the CCHP technology of foreshore energy stations can greatly reduce energy consumption and emissions of carbon dioxide and sulfur dioxide. In the process of developing the foreshore into ’24-hour City’, this project not only brings closer the foreshore area and international financial cities like New York and London, but also develops a more environmentally friendly area.

Major Projects

Shanghai Middle Yanggao Road Electric Power Tunnel

Shanghai Middle Yanggao Road Electric Power TunnelShanghai Yang High Road Power Tunnel

Business Section:Electric Power
Location:Shanghai
Project Completion Date:April 2006
Participating Mode:Managing Contractor
Project Category:Electric Power Tunnel

As a large-scale comprehensive project combining civil engineering, installation and electricity, Shanghai Middle Yanggao Road Power Tunnel Project is our country’s largest power tunnel. It is also a landscape engineering project to place all overhead high voltage lines under the ground in Pudong. After the completion, the ‘cobweb’ in the air on the south side of Shanghai Middle Yanggao Road completely disappeared. Middle Yanggao Road Power Tunnel was 3,180 meters in length and was divided into two parts: the tunnel and working well construction, among which the tunnel is about 2,800 meters in length along with cables of 22 million volts, which mainly supplies the People's Square and Lujiazui area. During the tunnel construction, we adopted the trenchless pipe jacking technology, dividing the construction into nine sections, among which 4 sections crossing under the road and 3 sections respectively crossing under East Yan’an Road, Luoshan Road Overpass and raw water box culvert. Top section construction imposes high requirements on environment deformation control. As there was no mature construction experience in ‘large-caliber, long-distance and hyperbolically curved pipe jacking underground butting construction’, construction is of great difficulty. The tunnel can allow small maintenance vehicles to enter. Therefore, if there is a power failure, maintenance will not affect ground traffic on Middle Yanggao Road. This makes line maintenance of the high voltage cable and daily maintenance more convenient. In addition, the monitoring equipment in the tunnel and the card access system into and out of the tunnel can prevent theft of the buried cables and make the power line safer.

Major Projects

Macao Onshore Natural Gas Input and Transmission System

Macao Onshore Natural Gas Input and Transmission SystemMacao onshore natural gas input and transmission system engineering

Business Section: Energy
Location:Macao
Participating Mode:Design + Build
Gas Transmission Scale: 126,000 Cubic Meters Per Hour

Macao Onshore Natural Gas Input and Transmission System is the first natural gas pipeline in Macao. STEC undertakes its design and partial construction. The main content of the design is ’Two Stations One Line’, that is, 5.28 km gas pipeline, the road central gate station as well as the metering station of the power plant, which mainly supplies the power plant, needs to residents and utilities on Macao Road. STEC brings together professionals in the pipeline, gate stations, equipment, materials, construction, water supply and drainage, electrical control into the Macao project team and they are responsible for the implementation of this project. Macao natural gas pipeline mainly supplies the power plant, residents’ needs and utilities on Macao Road. The gas source is borrowed from Zhuhai Hengqin, crossing to Macao through underwater directional drilling. After entering into the ring gate station on the Macao Road for the filtering metering, natural gas goes to Macao Power Plant, with gas design pressure of 4.0 Mpa, pipe length of 5.1 km and the total gas flow rate of 126,000 cubic meters / hour. The construction of this project helps optimize the energy structure in this area, enrich local energy varieties, relieve the tension of the energy supply and also has positive significance in reducing excessive reliance on fuel products for a long time, strengthening local risk reduction capabilities and ensuring energy supply safety as well as reducing exhaust emissions and environmental pollution.

Major Projects

12th-Five-Year Plan of Shanghai Gas Development

12th-Five-Year Plan of Shanghai Gas DevelopmentShanghai gas development “12th Five Year Plan”

Business Section:Energy
Location: Shanghai
Participating Mode:Plan
Gas Transmission Scale:400 thousand tons / year

The 12th-Five-Year Plan of Shanghai Gas Development, based on the development of the 11th-five-year plan, puts forward strategic thoughts, clear objectives and detailed tasks of gas development in the city and proposes safeguard measures. Through effective implementation of the plan, by the end of the ‘12th Five- Year’ plan, the artificial coal gas would exit smoothly, the scale of natural gas supply would reach 10 billion cubic meters, with the proportion in the primary energy consumption structure rising to 11%, the supply scale of liquefied petroleum gas would maintain at around 400 thousand tons per year and all the city's gas users would have more than 15 days’ supply in emergencies. This plan is a programmatic document of developing the gas industry in the city during the ‘12th Five-Year’ plan. We established the position and characteristics of our city, we think and plan our development of the gas industry based on the nationwide environment and has formed two part project achievements- ‘Preliminary Study on “12th Five-Year” Plan in Shanghai Gas industry’ and ‘Shanghai Gas Development 12th Five-Year Plan’, which has an important guiding role in promoting the regional joint development, realizing interconnection of natural gas trunk pipeline network in Yangtze Delta Region and establishing a national natural gas trading center.

Major Projects

Hainan CNPC Shennan LNG Storage Project

Hainan CNPC Shennan LNG Storage ProjectHainan petroleum storage project Shennan LNG

Business Section: Energy
Location:Hainan Province
Participating Mode:Design & Build
Gas Transmission Scale:4 million tons / year

In the process of adjusting the energy structure in our country, one of the important measures is to speed up the development and utilization of LNG. As the forerunner of the LNG industry in China, STEC has undertook design and part of the construction work in the first, second and third phase of Hainan CNPC Shennan LNG storage project. The first phase includes two 20-thousand-cubic-meter single containment tanks and a 40-thousand-cubic-meter quay with annual transportation scale of 800 thousand tons. The second phase includes expanding one 80-thousand-cubic-meter all-inclusive storage tank with annual transportation scale of 1.2 million tons. The third phase includes expanding one 80-thousand-cubic-meter all-inclusive storage tank with annual transportation scale of 2 million tons. In terms of the design, STEC broke through the shackles of traditional pipeline design by entering into the high end area of low temperature refrigeration technology for the first time, which has far-reaching significance in accelerating the development of new energy and other emerging industries, such as LNG. As the supporting project of Hainan gasification and the first domestic LNG secondary receiving station, Hainan CNPC Shennan LNG storage project can receive, store and transport LNG. The natural gas stored is connected with natural gas pipeline network around the island of Hainan Province through transportation and pipeline distribution. This can not only thoroughly solve the ‘gas panic’ problem in Hainan but also distribute natural gas to the users inside and outside Hainan Province and therefore balance the upstream supply and the downstream market demand.

Major Projects

Shanghai Tower Gas Drainage Pipe Project

Shanghai Tower Gas Drainage Pipe ProjectShanghai central gas drainage pipe project

Business Section: Energy
Location:Shanghai
Participating Mode: Design + Build
Gas Transmission Scale: 4,000 Cubic Meters Per Hour

Shanghai Tower is China's first and the world's third tallest building, with 118 floors in the main building with a total height of 632 meters. As its supporting project - Shanghai Tower Gas Drainage Pipe Project reaches 121 floors directly through pipelines, once again recreating the world's highest gas supply record, over Shanghai Global Financial Center. We undertook the design of the internal pipelines and the alarm system of Shanghai Tower and its gas installation project. In terms of the design, we added the automatic alarm and automatic cutting system into the gas system, which could ensure the gas source could be cut timely and effectively once gas leakage occurs, and prevent fire and explosion accidents to ensure gas safety. In construction, 150mm-diameter seamless steel pipe needed to be installed from the underground fourth floor to the top of Shanghai Tower, with only the diameter length up to 600 meters. The height of the pipeline construction is unprecedented. In addition, the settlement of the construction itself also brings some difficulties to the relatively static installation of natural gas pipeline. As the project is carried out in super high-rise building, safety issues are the primary factor. Therefore, before construction, we successfully overcame difficulties such as the gas pipe installation work high above the ground and multiplication of pipe bearing pressure, by comprehensively analyzing gas source, pressure, safety and geography factors. By arranging the bearing support and the telescopic compensator at the bottom of each gas vertical tube in Shanghai Tower, the total 6-ton-weight vertical tube in 120 floors with the diameter of 500 meters was properly dissipated. This has effectively solved the high construction pipeline deformation problem and ensured transmission security of natural gas with 4,000 cubic meters per hour. The smooth implementation of this project can further improve STEC’s high-rise gas construction and management standards and provide a reliable reference point for similar projects in the future.