The sodium sulfate crystal salt drying unit in a coal chemical industry's concentrated brine resource utilization device is prone to product salt failure during the drying process, the workload of workers is large, the surrounding working environment is dusty and the operating environment is poor, and the inlet pipe of the bag filter is easy to block , Equipment cleaning and parts replacement are frequent, maintenance is frequent, part of the maintenance space environment is poor, and the device cannot operate safely and stably for a long period of time.In view of the above-mentioned problems, the process flow and equipment of the sodium sulfate crystal salt drying unit in the concentrated brine resource utilization device were optimized and modified.After the renovation, good environmental and social benefits have been achieved. The operating cost of the entire concentrated brine resource utilization device is reduced, and the recovery rate of the device unit operation is improved.