Closed Cycle Inert Gas Spray Drying Project

Closed cycle inert gas spray drying project

August 16, 2014 Reading frequency: [4051]

Closed cycle inert gas spray drying project – closed cycle air flow spray drying unit consists of nitrogen closed cycle system, air flow spray dryer, solid gas separation, nitrogen back blowing dust removal, condensation cooling solvent recovery, steam heating and other main parts.

By using nitrogen as the conduction and heat transfer medium, the drying production of organic solvent suspensions, viscous and viscous liquid materials, as well as the recovery of organic solvents, in the fields of pharmaceutical, biochemical, chemical, biological and other technologies, has the practicality of low consumption, energy conservation, and emission reduction. The unit adopts the closed cycle technology, with nitrogen as the conduction and heat transfer medium.

While the liquid material containing organic solvent is dried and produced, the solvent is recycled by the condensation cooling technology. In order to improve the drying intensity and drying production capacity of the unit, the unit adopts the air flow spray drying technology, that is, the liquid (solid content is 50%) material is in the drying process, The liquid material is transported by a peristaltic pump to an airflow type spray gun installed in the drying tower (with 3-7 nozzles required for production capacity) for atomization into liquid droplets, which are in convective contact with the heat transfer gas from top to bottom from bottom to top for heat transfer and exchange, in order to achieve instant moisture drying.

The finished product is collected at the bottom of the drying tower, and the superheated gas is discharged by a circulating fan below the drying tower, and separated by a solid gas separator.

The fine powder material entrained in the superheated air settles to the bottom of the separator for material collection under the cutting cyclone action of the solid gas separator. The superheated gas passes through the nitrogen back blowing dust collector twice to capture the dust material entrained in the gas.

The waste heat gas enters the condenser and cools the medium through the condenser (with a condensation temperature of 3 ℃). Condensate to the dew point to achieve the recovery of organic solvents.

The circulation system is supplemented with nitrogen to achieve a new round of nitrogen closed loop drying production continuity, which meets the process requirements for industrial production in the relevant industries mentioned above.