Freshness preservation is the core of maintaining the flavor and taste of coffee beans, and nitrogen filling preservation has become the most mainstream and effective coffee bean fresh-keeping technology in the modern coffee industry. Special nitrogen generators for coffee bean preservation are professional gas production equipment developed for the fresh-keeping needs of coffee raw beans, roasted beans and ground coffee, which can stably provide high-purity inert nitrogen gas, isolate air oxygen and moisture, and effectively delay the oxidation, mildew and flavor loss of coffee beans. Coffee beans are rich in aromatic substances, fats and oils. After contacting with oxygen in the air, they are prone to oxidative deterioration, resulting in the loss of unique coffee fragrance, sour taste deterioration and rancidity. At the same time, the moisture in the air will cause coffee beans to absorb water and mildew, shortening the shelf life greatly. Nitrogen is a colorless, odorless, non-toxic and chemically stable inert gas, which can completely isolate coffee beans from air after filling, and lock the fresh flavor of coffee beans for a long time.

The nitrogen generator for coffee bean preservation is optimized and designed for the food fresh-keeping scenario, with stable nitrogen purity between 99.5% and 99.9%, which fully meets the food-grade fresh-keeping standard. The equipment adopts safe and environmentally friendly physical air separation technology, no chemical additives in the gas production process, and the produced nitrogen is food-grade safe, which will not cause secondary pollution to coffee beans and meet food safety production specifications. The equipment is compact in structure, simple to operate, and can be matched with automatic coffee packaging machines, nitrogen flushing sealing machines and other equipment to realize assembly line nitrogen flushing and fresh-keeping packaging. It is suitable for small coffee workshops, medium and large coffee processing factories and coffee brand production bases. Compared with traditional bottled nitrogen, special nitrogen generators for coffee preservation have lower operating costs, can work continuously for 24 hours, and realize on-demand nitrogen supply, avoiding waste of bottled gas. Long-term use of nitrogen filling preservation can effectively extend the shelf life of roasted coffee beans from 1-2 months to 12-18 months, completely retain the rich aroma and mellow taste of coffee beans, and greatly improve the product quality and market competitiveness of coffee products.