The operational environments in municipal environmental protection are diverse, with complex media compositions, placing high demands on equipment for environmental friendliness, stability, sealing performance, and adaptability. Thanks to their reliable and robust design, mortar pumps are widely used in numerous municipal operation and maintenance as well as environmental treatment applications. In municipal wastewater treatment, mortar pumps are employed to convey sludge, sewage slurry, and biochemical sludge generated during the treatment process—media that typically have high solids content, high viscosity, and may contain harmful impurities. These pumps operate smoothly and leak-free, effectively preventing secondary pollution caused by sludge leakage, while also offering excellent wear resistance to withstand the abrasive action of impurities in the sludge, thereby enhancing treatment efficiency. In waste management, mortar pumps are used to handle leachate and ash–slag slurry produced after waste incineration; given the complex and highly corrosive nature of leachate, these pumps are constructed from corrosion-resistant materials to resist leachate erosion and ensure safe delivery of the medium to processing equipment. Moreover, in municipal road construction, river dredging, and pipeline network maintenance, mortar pumps are utilized to convey construction mortars and dredging sludges, adapting seamlessly to challenging outdoor working conditions and allowing flexible mobile operations to meet the diverse conveying needs of municipal projects. The application of mortar pumps in the municipal environmental protection sector effectively enhances the efficiency of municipal operation and maintenance as well as environmental treatment, reduces environmental pollution, and contributes to the improvement of the urban ecological environment. They are suitable for municipal projects and environmental protection initiatives of varying scales, providing strong support for sustainable urban development.