锂电四氧化三锰合成工艺，对锰液、碱液、络合剂投加比例与反应 pH 控制精度要求较高，反应釜内 pH 控制在 8.5~8.7 区间，是影响成品合成效率与品质的关键因素之一。

南京麦文环保定制化智能加药系统，针对该工艺采用恒定硫酸锰液 + 络合剂投加量，依托 pH 信号闭环自动调节液碱投加的控制方案：硫酸锰液、络合剂保持定量投加，依托反应釜在线 pH 计反馈，通过 PID 闭环调整液碱计量泵，实现反应体系 pH 稳定调控。

现场配置 4 组独立反应釜加药回路，每组配置硫酸锰液、液碱、络合剂计量泵，采用 4 用 1 备泵组冗余设计，支撑连续生产；各组反应釜药剂投加独立调控，互不干扰。系统可复用现场原有药剂储槽、液位监测、卸料泵及釜上 pH 探头，新增计量投加单元与智能控制系统。

整套系统搭载西门子 Smart200 PLC，搭配高精度电磁流量计，实现药剂流量闭环控制；全部管路采用 CPVC 化工管道，配套耐腐双由令球阀，耐受硫酸锰液、液碱、络合剂介质腐蚀，适配锂电合成苛刻工况。

本项目为交钥匙工艺包，提供设备撬装集成、出厂测试、现场安装、联动调试服务。系统有助于优化药剂消耗，实时监测投加数据，助力产品品质稳定，适配锂电正极材料生产工况的自动化加药装备。

NAIJING MAVIN ENVIRONMENTAL｜Intelligent Dosing System for Lithium Manganese Tetroxide Synthesis

The synthesis process of lithium manganese tetroxide imposes stringent requirements on the dosing ratio of manganese solution, alkali solution and complexing agent, as well as the control accuracy of reaction pH value. Maintaining the pH inside the reactor within the range of 8.5~8.7 is one of the critical factors affecting synthesis efficiency and finished product quality.

Nanjing Mavin Environmental provides customized intelligent dosing systems tailored to this process. The control scheme adopts constant dosing of manganese sulfate solution and complexing agent, with automatic adjustment of caustic soda dosing based on pH signal closed-loop feedback: manganese sulfate solution and complexing agent are fed at fixed flow rates. Relying on feedback from the online pH meter installed on the reactor, the PID closed-loop controller modulates the caustic soda metering pump to achieve stable pH regulation of the reaction system.

The site is equipped with 4 independent reactor dosing loops. Each loop is fitted with metering pumps for manganese sulfate solution, caustic soda and complexing agent. A 4-working + 1-standby redundant pump configuration is deployed to support uninterrupted production. Each reactor features independent dosing regulation without cross-interference between loops. The system can reuse existing on-site chemical storage tanks, level monitors, unloading pumps and reactor-mounted pH probes, with only metering dosing units and intelligent control systems newly added.

The complete system is powered by Siemens Smart200 PLC, paired with high-precision electromagnetic flowmeters to realize closed-loop control of chemical flow. All pipelines adopt CPVC chemical piping, equipped with corrosion-resistant double union ball valves, which resist corrosion from manganese sulfate solution, caustic soda and complexing agents, and accommodate the harsh working conditions of lithium material synthesis.

This project is delivered as a turnkey process package, providing skid-mounted equipment integration, factory acceptance testing, on-site installation and joint commissioning services. The system helps optimize chemical consumption, monitor dosing data in real time, and stabilize product quality. It serves as automated dosing equipment suitable for the production conditions of lithium cathode material manufacturing.