【Ten Years of Rapid Development in Chemical Equipment】From 1634 to 2021: SHANGGU developed China’s first set of SPC units, which were successfully tested

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Happy May Day 2024! Safety first. Let’s give praise and support to the achievements made in China’s chemical engineering technology and equipment. **********************【Ten Years of Progress in Chemical Engineering Equipment】A continuously updated summary post is available; feel free to join the discussions at https://bbs.hcbbs.com/thread-3576046-1-1.html (Source: Haichuan Chemical Engineering Forum) ***************** Shanggu has successfully tested the first SPC unit developed in China. In November 2021, Shanggu managed to successfully test the first SPC unit developed independently in China. This unit will be used in a chemical project in South China that has an annual production capacity of 150,000 tons of maleic anhydride. 　　It is understood that the main process routes for maleic anhydride production are the benzene oxidation method and the n-butane method, with the latter being the trend at present due to its greener nature. Focusing on the n-butane-based maleic anhydride production process, Shaanxi Gas Turbine developed an optimized configuration of an axial flow compressor, motor, and turbine mounted on the same shaft, namely the “SPC unit”. 　　In this system, an electrically driven axial flow compressor is used to supply the compressed air required for the synthesis process in the phosgene reactor. The heat generated by the reactor is recovered by a boiler and converted into high-temperature, high-pressure steam; this steam then drives a turbine. By connecting the compressor through a clutch, it is possible to significantly reduce the current drawn by the motor, thereby saving power from the external electrical grid. This approach enables the efficient operation of the facility and promotes economic efficiency as well as environmental sustainability. 　　The SPC unit features a coaxial arrangement of the axial flow compressor, turbine, and electric/generator, replacing the traditional separate-axis arrangements of turbine + axial flow compressor and turbine + generator. Through technological innovation, this unit is created, enabling cost savings for users and improving energy efficiency; it has thus received high recognition from users. 　　Shanxi Blower also developed customized control solutions for users, including emergency shutdown procedures for the reactor, feedforward control schemes for fans, as well as control strategies for emergency shutdown of the reactor and load shedding of the turbine when three units are operating simultaneously.