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As a relatively new type of desulfurization system, long-term high-efficiency desulfurization is a critical issue for commercial spray dispersion system applications. To analyze the coupling effects of different operation parameters, a series of operation performance predictions with their optimizations are implemented. Through the analysis of the operating influencing factors based on artificial intelligence, the key influencing factors of the operation performance are determined. For instance, the tube immersion depth accounts for 46% of the factors that affect the desulfurization efficiency. Moreover, the system stability analysis determines not only the system's fine operation stability, but also identifies several factors, such as the PH and inlet gas temperature, that require key control for operational stability. For instance, the phase margin of the PH, flue gas temperature, and SO2 concentration in flue gas is greater than 0 when the amplitude margin reaches 1 point, allowing the PH control system to demonstrate excellent system operating stability. Then, after a systematic analysis of the operation, several optimizations of the operation are provided. Finally, in recent applications, the optimized spray dispersion has demonstrated excellent desulfurization performance: the desulfurization efficiency was greater than 99%, and the outlet SO2 concentration was less than 15 mg/m3 in three years of operation, which means that near-zero SO2 emissions in long cycles were essentially achieved, and 1/3 and 1/5 of the energy and cost consumption were reduced.

The application of cast-in-situ phosphogypsum as the wall material of building structures can greatly reduce the environmental pollution caused by phosphogypsum. Through the uniaxial compression test of cast-in-situ phosphogypsum specimens, the compressive strength of cast-in-situ phosphogypsum is determined, the constitutive relationship of the material is drawn up, and the elastic modulus and Poisson’s ratio of the material are determined. The results show that when the strain of the specimen is close to the peak strain, the cast-in-situ phosphogypsum has brittle properties and rapidly fails, where the failure state is mainly splitting failure. The retarder has a great influence on the peak stress. When the content of the retarder is about 0.3%, the peak stress is 8.6 MPa and the ultimate strain is 2.54 × 10−3, while the peak stress is 2.8 MPa and the ultimate strain is 2.01 × 10−3. The three segment constitutive fitted equations reflect all the characteristics of the compression specimen. When the strength of the cast-in-situ phosphogypsum is high, the elastic modulus is also high. When the content of the retarder is about 0.3%, the elastic modulus is 5300 MPa, and when the content of retarder is far greater than 0.3%, the elastic modulus is 2000 MPa. The Poisson’s ratio of material is recommended as 0.19.