Shuangliang Energy-Saving’s waste heat-driven absorption chiller delivered to Zhejiang Petrochemical

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Recently, 10 waste-heat driven absorption chillers customized by Shuangliang Energy for the renovation and upgrade project of Zhejiang Petrochemical Co., Ltd.’s integrated refining and petrochemical complex have begun to be shipped. With a total cooling capacity of 70 MW, these chillers will help Zhejiang Petrochemical achieve a win-win scenario by enabling both the efficient utilization of refining resources and low-carbon production, thus setting a benchmark for the transformation and upgrading of integrated refining and petrochemical industries in China. Zhejiang Petrochemical’s high-end new materials project adheres to a differentiated development strategy focused on producing large amounts of aromatics while also manufacturing petroleum products. As the level of refining and processing increases, the volume of light components generated as by-products also keeps growing. If such light components are sold directly overseas, their added value is relatively low ； Zhejiang Petrochemical innovatively converted it into ethylene, and concurrently developed downstream derivative production capacity that is in short supply domestically. This has not only effectively expanded its profit margins, but also enhanced the industry’s resilience to risks. The project plans to build 17 production units for substances such as nitric acid, cyclohexanol, adipic acid, hexamethylenediamine, nylon 66, and hexanitrocinene. The products planned by the company are mostly new chemical materials that are in urgent demand in China. The implementation of this project is expected not only to disrupt the oligopolistic competitive landscape in the olefins industry, but also to serve as a direct benchmark model for the transformation and upgrading of China’s chemical industry. As a support for the supply of raw materials needed for high-end new material projects, the integrated refining and chemical processing upgrade project located in the Zhoushan Archipelago Development Zone is a key initiative by Zhejiang Petrochemical to drive industrial structure adjustment. Its aim is to enhance the scale and concentration of the petrochemical industry, thereby promoting the optimization and upgrading of related processing industries and establishing a solid foundation for the production of high-end new materials. The project involves the construction of a new 3-million-ton/year No. 3 slurry bed residuum hydrotreating unit and a new No. 2 oil residue gasification unit with an effective gas production capacity of 240,000 Nm³/h. Through the No. 3 1.2-million-ton/year C1/C2 separation unit, dry gas from the entire plant is recovered, yielding ethane-rich gas and ethylene-rich gas, thereby making full use of C2 resources. The C1/C2 separation process requires a large amount of chilled water. To meet this key requirement, Shuangliang Energy Saving provided 10 waste heat-driven absorption chiller systems with a total cooling capacity of 70 MW; these systems utilize waste heat to supply a \"free source of cold\" for the production facilities, thereby achieving energy savings and reduced consumption in the refrigeration system from the root level. The Shuangliang waste heat-driven absorption chillers have been widely used in various applications such as the separation of C1/C2/C3 gases in the petrochemical industry, deep cryogenic pre-cooling for CCUS, and the cooling of ethylene glycol exhaust gases. Thanks to their mature technology and customized solutions, they serve as a key element for helping energy-intensive industries reduce energy consumption and carbon emissions. With the continued implementation of the “dual carbon” policy, Shuangliang will continue to focus on key sectors such as petrochemicals, expanding the application scenarios of waste heat recovery for cooling and heating. This will help traditional refining and chemical enterprises transition into green and low-carbon integrated service providers, thereby contributing Shuangliang’s strength to the high-quality development of China’s chemical industry.