A contract was successfully signed for the 220°C ultra-high temperature screw steam heat pump to be used in the expansion project and raw material upgrade initiative of CNPC’s Urumqi Petrochemical aromatics facility at No. 711 Institute

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Recently, CSIC Institute 711 successfully secured a contract for the expansion project of PetroChina’s Urumqi petrochemical aromatics plant and the related renovation of its raw material supply systems. The project will use a super-high-temperature screw steam heat pump at 220°C, with a designed steam compression and recovery capacity of 350 tons per hour. Aromatic compound plants and the PTA plants downstream of them generate large amounts of waste heat steam during production, which has traditionally been difficult to utilize efficiently. The project will utilize ultra-high-temperature screw steam heat pumps operating at 220°C to \"pressurize and heat\" this low-pressure steam, allowing it to be reused as high-quality process steam in the production process. This approach enables the hierarchical utilization of heat and the overall optimization of the energy system. It is estimated that once the project is operational, it will enable a reduction of 576,700 tons of carbon dioxide emissions per year alone; this is equivalent to saving around 230,000 tons of standard coal. Its steam generation capacity is sufficient to replace a medium-sized coal-fired boiler. The application of this groundbreaking technology is made possible by the \"Aromatic hydrocarbons low-temperature high-efficiency recovery technology and related equipment,\" which was developed jointly by No. 711 Research Institute together with Sinopec Engineering Construction Company, Sinopec Fujian United Petrochemical, Jiujiang Petrochemical and other entities. The first set of such equipment has been successfully deployed in practical applications, and it has been officially included by the **Energy Bureau in the \"Fourth Batch of Major Technical Equipment for Use in the Energy Sector.\" The implementation of this project represents the continued application of the first set of technological achievements, providing the industry with an industrial carbon-reduction approach that can be replicated on a large scale. In the future, No. 711 Institute will continue to focus on high-temperature heat pumps and screw expanders as key technologies to promote the efficient utilization of industrial waste heat and the upgrading of steam system designs, thereby helping China’s petrochemical industry to develop a more efficient, low-carbon, and safe energy system.