求翻译：Liuguo chemical powdery ammonium phosphate production plant raw materials using phosphoric acid extraction of dilute acid tank and the concentrated phosphoric acid storage tank bottom slag acid, DAP system can balance the dilute acid washing liquid, solid content is high, nutrition is fluctuant bigger, neutralization and concentration of ammonium phosphate slurry viscosity, slurry liquidity poor, device operation cycle is short. Process control indexes are difficult to stabilize product nutrient fluctuated. In view of these problems, through analysis and Research on the device of circulating water, concentration, a hot-air system production process carried out a series of technical reformation, the device can have more than design production capacity, product quality has improved steadily.是什么意思？

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