Flash Dryer Production Process

Changzhou Purner Drying Equipment Manufacturing Co., Ltd. has a unique perspective on the production process of flash drying machines. The flash drying machine is an ideal equipment for handling filter cakes, paste-like materials, thixotropic, heat-sensitive materials, as well as granular and powdered materials. It has a vast application prospect in industries such as dyes, fine chemicals, chemical fibers, petroleum, and food. In some southern regions, the humidity in winter is only 0.0008 kg water/kg absolute dry air, but in spring and summer, the atmospheric humidity can reach 0.025 kg water/kg absolute dry air, which is more than three times higher than that in winter. Therefore, operating hot air drying at a lower exhaust temperature (＜90℃) will result in a decrease in drying speed and an increase in required time when the atmospheric humidity rises in spring and summer. The equipment is compact, with a small footprint, high production efficiency, continuous production, and achieves large output with small equipment. The higher the hot air temperature, the more thermal energy it contains, and the lower the relative humidity of the hot air, which enhances its ability to absorb and carry moisture, making it very conducive to drying. Moreover, the drying thermal efficiency is also very high.
Material is carried upwards with the twisted airflow due to centrifugal force. Large pieces, which have not yet reached moisture content and thus have a higher specific gravity, are more affected by centrifugal force. As their twisting radius increases, when it exceeds the separator's radius, they are trapped inside the drying chamber for further drying and breakdown until they just overflow. Fine particles that meet the drying requirements are carried along with the hot airflow into the gas-solid separator. The exhaust is then discharged into the atmosphere by the induced draft fan. Wet particle clusters that have not reached the drying requirements are thrown towards the vessel wall by the airflow's upward movement and the centrifugal force. After being separated by the classifier, they fall back to the bottom of the drying chamber, where they are further broken down and dried until reaching the required particle size and moisture content.