Mechanical drying of Colombian coffee beans

The invention relates to a method for drying coffee beans, which is characterized in that it comprises the following steps:

The coffee drying equipment comprises a hot air stove, a hot fan connected with the hot air stove, a hot air chamber connected with the hot air stove, and a drying chamber connected with the hot air chamber. A hot air outlet is arranged between the hot air chamber and the drying chamber, and the drying chamber is provided with a material outlet, and the drying chamber comprises an upper drying pool and a lower drying tank. The drying room is provided with an upper pool drying network and a lower pool drying network, the upper pool drying network is arranged above the lower pool drying network, the upper pool drying network is the upper drying pool, and the upper pool drying network is between the upper pool drying network and the lower pool drying network. the hot tuyere comprises an upper hot tuyere and a lower hot tuyere, the upper hot tuyere is arranged between the hot air chamber and the lower drying pool, and the lower hot tuyere is arranged below the lower pool drying network. The upper pool drying net is provided with a discharge port, and the discharge port is provided with a discharge port cover plate.

2) loading coffee beans for the first time

After the peeling, degumming and soaking coffee beans are filtered, they are poured into the upper drying pool and flattened, more than one cylinder is evenly inserted on the coffee beans, one end of the cylinder is closed, and the other end is in contact with the upper pool drying network.

[0004] 3) remove epidermis moisture

Open the upper hot tuyere and close the lower hot tuyere, and penetrate and dry the coffee beans in the upper drying pool until the moisture content of the coffee beans reaches 21% Murray 23%.

[0005] 4) Open the discharge cover, let the coffee beans from the upper drying pool flow to the lower drying pool, and flatten the coffee beans that fall to the lower layer.

5) second loading

After the peeled, degummed and soaked coffee beans are filtered, they are poured into the drying pool and flattened, more than one cylinder is evenly inserted on the coffee beans, and the cylinder is in contact with the upper drying net.

6) balance and removal of biological moisture

Keep the upper hot tuyere open and the lower hot tuyere closed so that the coffee from the upper hot tuyere to the upper drying pool can penetrate and dry at the same time, resulting in back pressure on the coffee from the lower drying pool until the moisture content of the coffee beans in the lower drying chamber is reduced to 15% 17%.

7) Rapid drying

Open the lower hot tuyere and close the upper hot tuyere, while drying the coffee in the lower pool quickly, the coffee in the upper drying pool is dried through hot air until the moisture content of the coffee beans in the lower pool reaches 11%-13%. 8) unload the coffee beans from the lower drying room and put them into storage.

9) repeat the third to eighth steps.

[0006] the method of the invention makes the coffee drying process not affected by natural factors, and can reduce the labor intensity of workers, save space, and improve the drying uniformity of coffee beans. Reasonable arrangement of penetration drying and back pressure drying sequence can save energy and make full use of energy.

X technology original text link: http://www.x-jishu.com/zhuanli/01/201410046293.html