[Haichuan Modular Installation] Modular production of gasoline hydrogenation unit of Guangdong Petrochemical ethylene plant
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From August 23 to 24, 2021, the 1.2 million tons/year ethylene unit gasoline hydrogenation unit module of the Guangdong Petrochemical 20 million tons/year refining and chemical integration project built by the Equipment Manufacturing Branch of Global Sixth Construction Company was officially shipped for shipment, and the "new results of module construction" were freshly released. This module is the first scientific and technological coordination project of independent modular design, modular construction and modular construction of CNPC's refining and chemical equipment. It is an effective carrier of CNPC's transformation and upgrading and high-quality development. It is also a response to the efforts of Huanqiu Company to build a world-class comprehensive service provider for refining and chemical engineering and the group company to build a world-class comprehensive energy company. * * “An important measure of the “One Belt, One Road” strategy.
On September 5, Guangdong Petrochemical's 1.2 million tons/year ethylene plant cracking gasoline hydrogenation process unit PAU-03, contracted by Huanqiu Company EPC, was installed in its entirety. This is a milestone project achievement of Huanqiu Company in implementing the "six modernizations" construction requirements of the group company. It is the first time that Huanqiu Company has completed the project in a large-scale petrochemical plant. The pilot process unit in the chemical plant is a modular construction project with full process flow, full professionalism, and fully independent design, procurement, construction, and installation. It marks that Huanqiu has opened up the entire "six modernization" construction process in the field of refining and chemical engineering construction, and fully reflects Huanqiu's EPC capabilities and integrated project management advantages. The module is a steel structure frame, 42 meters long, 9 meters wide and 13 meters high. It is divided into 3 floors and contains 13 static equipment, 6000 inches of pipelines and supporting electrical instruments. The overall weight is 675 tons. Its main task is to reprocess the by-product "pyrolysis gasoline" of the ethylene unit, hydrogenate and saturate the unsaturated olefins in the pyrolysis gasoline, and perform hydrocracking and purification of hydrocarbon compounds containing other elements.
Standardized design leads the way. Standardized design is the foundation and leader of the "six modernizations" construction. In the module design stage, Huanqiu Beijing Company always adheres to standardized design and rapidly promotes design work with high quality and efficiency. It not only achieves efficiency improvement in the design process, but also has a significant effect on optimizing the source of subsequent processes. Although modular construction is of great benefit and is a new trend in engineering construction, it is not easy to build a small "device". In the design stage, we should not only consider the "device" itself, but also consider how to divide the various modular units.: Each module is designed to meet transportation conditions, and connections between modules should be minimized. Huanqiu Beijing Company actively organized design professionals to carry out multiple rounds of comparison and optimization of design plans based on the characteristics and transportation conditions of the device, combined with cost, cycle and other factors, and finally determined the module division plan, reasonably planned the space layout and optimized the equipment size. The design team accurately designed the connection method between the steel structure and the modules through comprehensive module stress calculations. In addition, they collected the actual weight of equipment, structures, pipes and even bolts and nuts to accurately find the center of gravity of the module, providing technical support for the overall construction and transportation of the module into place.
The advantages of modular construction are obvious. Modular construction has the advantages of short construction period, better construction efficiency and quality controllability, and higher construction safety. The gasoline hydrogenation unit of the ethylene unit is divided into 4 process modules, 3 utility modules and 5 skids according to process functions, which are the gasoline hydrogenation reaction module, the first-stage stabilizing tower/depentanizer heat exchange module, the hydrogenation reactor heat exchange module, the second-stage stripper/de-octane tower heat exchange module, 2 pipe gallery modules, 1 pipe gallery truss module, 1 compressor skid and 4 column skids. The structure is compact and covers all professional categories. The structure and equipment are tall, large and heavy, and the construction process is complex and the amount of work is large. For a long time, the narrow working surface on site has become the main bottleneck restricting the efficiency of this construction. Huanqiu Beijing Company integrated standardized design and procurement innovation, and used factory-based prefabrication to be processed and constructed at the equipment manufacturing plant of Huanqiu Sixth Construction Company. Construction officially started on May 25, and was shipped as a whole on August 24. The construction task was successfully completed in 88 days, shortening the construction period by one month compared to traditional construction methods. Compared with conventional on-site installation, the modular construction method greatly reduces the safety risks caused by cross-site operations, reduces the impact of operations in other areas, and achieves synchronized civil construction and installation operations. * * Improved work efficiency and ensured project quality.