On May 25th, at the construction site of the 5# 100,000 m³ propane (propylene) low-temperature storage tank of Fuzhou Zhongmin New Energy Co., Ltd. undertaken by SPCECC, two blowers took 3.5 hours to blow the dome with a diameter of about 70 meters and a weight of more than 550 tons to " "Blow" to an altitude of 33.3 meters, which is equivalent to the height of an 11-story building, realizing the precise docking of the vaulted roof plate and the pressure-bearing ring. The success of the gas-lifting roof of the propane storage tank not only refreshed the record of SPCECC low-temperature storage tank construction, but also marked that the civil construction of the storage tank has achieved a major node goal. base.

Before the start of construction of the cryogenic storage tank, Li Lihong, the company's deputy chief engineer and director of the technology center, organized experts in the industry to conduct demonstrations many times to discuss the preparation of a special construction plan for the cryogenic storage tank. During the construction process, all staff of the project department carefully organized and arranged meticulously, strictly implemented the work process, strengthened on-site supervision, and ensured that all aspects of the work were correct. A lot of meticulous work embodies the wisdom and painstaking efforts of the management staff. Project manager Li Yinping and executive manager Liu Chao led the construction team to continuously explore the management mode. They actively implemented the "QR code + unique code" measure in the concrete test block inspection, and did a good job of anti-counterfeiting through face recognition of samplers and inspectors , Anti-error work to ensure that the test block detection is foolproof. In order to ensure the safety and quality of construction, a safety and quality inspection system is adopted during the construction process to record in real time the time, work content, construction area and other content of daily picture collection, and store them in the database for everyone to share resources and improve work efficiency. Actively promote the construction of smart construction sites, and use technical means such as high-support formwork detectors to ensure that the verticality and ellipticity of the prestressed concrete exterior walls are smooth and flawless. The whole process has achieved "zero defect", "zero accident" and "zero rework". Odd jobs" goal.

In order to ensure the smooth progress of the cryogenic storage tank jacking, before the "air lift", Li Lihong, the deputy chief engineer, led relevant technical personnel in advance to ensure the verticality, ellipticity, flatness of the inner side of the outer tank, sealing system, balance system, and power system. As well as the measurement and monitoring system, etc., carry out detailed inspections to ensure the smooth implementation of the jacking work. On the day of the jacking, Chairman Gao Jiancheng, Deputy General Manager, Chief Engineer Wang Junjie, Deputy Chief Engineer Wang Yeyi, together with the leaders of the owner, the project team and the leaders of the supervisory unit, witnessed the process of gas lifting of the storage tank.

According to Wang Guoku, manager of a company, the "air lift" operation of storage tanks is one of the most difficult, most complicated and risky nodes in the installation and construction of large storage tanks. The fan system is used to lift the dome of the storage tank slowly to the predetermined position on the top of the storage tank through the air pressure, and realize the fit with the pressure ring of the tank top. During the jacking process, in order to ensure that the dome does not tilt or overturn, a balanced guiding system composed of steel wire ropes and pulley blocks is evenly distributed along the circumference of the storage tank to ensure that the storage tank is lifted according to the design route during the lifting process. At the same time, a pressure and displacement detection system is also installed on the outer tank wall and dome, and real-time monitoring is carried out through the digital intelligent monitoring platform to ensure that the dome reaches the design position safely and smoothly. Through the four major systems of balance guidance, storage tank sealing, jacking power and intelligent monitoring, the parameters such as air pressure, speed, and deflection rate when the tank is lifted are precisely controlled to fully guarantee the safety and stability of the air pressure lift. When the dome is raised to the predetermined position, it is welded to the top of the tank wall while maintaining the pressure inside the tank, so as to complete the entire roof lifting operation.

The construction of Fuzhou Zhongmin New Energy Propane Low Temperature Tank Project not only promoted the construction of Fujian Meide Petrochemical and Wanjing Petrochemical PDH projects in Fuzhou, but also extended polypropylene to downstream enterprises such as Zhongjing Petrochemical, Zhongjiang Petrochemical and Shangjing New Materials. The industrial chain helps Fuzhou complete the closed-loop propane-PDH-polypropylene-BOPP industrial chain.

In recent years, relying on its outstanding construction technology management, SPCECC has successively undertaken the construction of Hengli Petrochemical (Dalian) 20 million tons/year refining and chemical integration project (3 sets of 150,000 m³ storage tanks), Zhejiang Petrochemical 40 million tons/year refining and chemical integration Project large-scale tank group, Shandong Yulong Petrochemical 20 million tons/year refining and chemical integration project oil refining and large-scale chemical tank farm, Yanchang Petroleum No. 3 crude oil depot (510,000 m³) tank group, LNG fields such as Ansai, Yanchuan, and Yinzhen Station cryogenic storage tank project, accumulated and mastered a wealth of construction experience and construction technology. In the future, SPCECC will continue to challenge and innovate, continue to refresh the construction performance of various large storage tanks, maintain a good brand image, and provide a strong guarantee for the adjustment of the national energy structure and the high-quality development of the social economy. Editor/He Yuting