Alkaline leaching equipment in process of preparing aluminum hydroxide from aluminum ash

Abstract

The application discloses a kind of alkali leaching equipment in the process of aluminum ash preparation aluminum hydroxide, the equipment is integrated heating and temperature control on the basis of alkali leaching tank, containing heat buffer cavity in the flue gas conduction path downstream of calcination flue gas passageway, phase change temperature in cavity encapsulation matches the phase change heat storage material of alkali leaching process interval to dynamically buffer flue gas heat fluctuation;Multi-source sensing unit real-time acquisition reaction slurry temperature, flue gas temperature and flow data;Dual-mode control execution mechanism is accurately controlled flue gas heat input by main flow regulating valve and assisted by tank wall auxiliary heating element to fine-tune;Control module fuses feedforward compensation and feedback fine-tuning logic, and cooperate flue gas bypass branch, waste heat cascade recovery unit and double fault-tolerant mechanism, effectively overcome the problem of alkali leaching reaction temperature instability caused by calcination flue gas waste heat non-steady-state fluctuation, while ensuring high-precision temperature control of alumina leaching reaction, realize the full-chain efficient utilization of flue gas waste heat from high-temperature buffer to low-temperature preheating.

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