Abstract：The adipic acid crystallizer is a negative pressure operating equipment, which operates on the principle of vacuum evaporation, cooling, crystallization, and precipitation. The crystallizer discharge process is difficult to operate and requires a "liquid introduction" operation. It is pumped out by a centrifugal pump and transported to a storage tank. It is difficult and time-consuming to introduce liquid from the crystallizer discharge to the pump inlet. Moreover, the crystallizer is prone to flow interruption during daily operation, and the pump inlet and outlet pipelines are easily blocked. The discharge process of the crystallizer, simplifies the operation steps were explored and optimized, and has a significant promoting effect on the quality improvement of adipic acid product crystals. A new discharge process idea is proposed, and based on the experimental measurement results of crystal particle size distribution, a new adipic acid crystallizer discharge device and process are designed, which reduces maintenance costs and operational difficulties, eliminates safety hazards, and ensures the stable operation of the device; Eliminating the interference of the impeller on particle size ensures the subsequent separation effect, which is conducive to the separation of subsequent liquid and solid phases and the drying of the fluidized bed, while significantly reducing the moisture and nitric acid content in the product; After implementation, the liquid level control of the crystallizer becomes more stable, ensuring stable product quality.
王 磊. 己二酸结晶器出料工艺技术研究及应用[J]. 煤炭与化工, 2024, 47(1): 148-150，160..
Wang Lei. Research and application on discharge technology of adipic acid crystallizer. CCI, 2024, 47(1): 148-150，160..
