BGZ series closed cycle spray dryer

1Closed cycle spray dryer

closed formCirculating spray dryerWorking Principle:

The closed cycle spray drying system works in a closed environment. The drying medium is inert gas, usually N2, which is suitable for drying materials containing toxic gas or materials prone to oxidation during the drying process; The system uses inert gas as the circulating gas, which has a protective effect on dry materials. The circulating gas undergoes processes of moisture loading and dehumidification, and the medium can be reused; Nitrogen enters after being heated by the heaterdrying towerThe liquid material is transported to the centrifugal nozzle by a screw pump, and the liquid is circulated at high speednebulizerThe atomized powder material is discharged from the bottom of the tower, and the evaporated organic solvent gas is compressed by the negative pressure of the fan. The dust trapped in the gas is separated by a cyclone separator and a spray tower, and the saturated organic solvent gas is condensed into a liquid through a condenser and discharged from the condenser. The non condensable gas medium is continuously heated and reused as a drying carrier in the system. And regular, ordinaryCentrifugal spray dryingThe purpose of dehumidification is achieved through continuous air supply and exhaust, which is also an explosion-proof closed typeCentrifugal spray drying equipmentCompared to regular centrifugationSpray drying equipmentAn obvious difference; The drying medium in the drying system is operated under positive pressure internally, maintaining a certain positive pressure value. If the internal pressure drops, the pressure transmitter automatically controls the inlet to ensure system pressure balance.

The closed cycle spray drying system is mainly used for products containing alcohol and flammable and explosive solvents in the slurry, or products that are easily oxidized and cannot contact the air. The products produced by this machine are consistent and can be used to manufacture spherical materials. It is suitable for precision high ceramics such as tungsten carbide, silicon nitride, nano ceramics, and pharmaceutical intermediates.

2、 Product application

Non oxide ceramics (AeN, Si3N4, etc.), hard alloys, high-performance battery materials, etc. Seasoning and health products. Pharmaceuticals, vitamins, and organic medicines. Synthetic resin and paraffin wax. Alcoholic explosion-proof hazardous products include soy protein powder, soybean meal ethylene glycol monobutyl ether, guanidine nitrate, sodium cyanate, acetylacetone, acetonitrile, chemical and intermediate products, etc

3、 Explosion proof closed cycleCentrifugal spray dryer

▲ Explosion proof closed cycle centrifugeSpray dryerSystem composition

The explosion-proof closed cycle centrifugal spray dryer system consists of the main engine of the centrifugal spray dryer, heater with air filter, blower, moisture separator, large and small cooling towers, spray tower, exhaust fan, primary cyclone separator, secondary cyclone separator, pump, oxygen detector, pipeline and control valve.

▲ Working principle of explosion-proof closed cycle centrifugal spray dryer system

Firstly, heated nitrogen gas is filled into the drying tower, and the dried liquid material is transported to the centrifugal nozzle through an infusion pump. The liquid material is atomized into small droplets by a high-speed rotating centrifugal atomizer, and the droplets undergo sufficient heat exchange with the hot nitrogen gas in the drying tower. The liquid part of the material is instantly evaporated, and the powder material formed by the solid part settles at the bottom of the tower. Then, the dried powder material is discharged from the bottom of the tower. Among them, the evaporated organic solvent gas is subjected to dust removal treatment by devices such as cyclone separators and spray towers under the action of a fan, and then the saturated organic solvent gas after dust removal is condensed into liquid and discharged from the condenser. During this process, the inert gas used as a drying medium is continuously heated and reused as a drying carrier within the system.

The explosion-proof closed cycle centrifugal spray drying system works in a closed environment. The drying medium is inert gas such as nitrogen. The drying tower is operated under positive pressure. If the internal pressure drops, the pressure transmitter can automatically control the amount of nitrogen entering to ensure the system pressure balance. Due to the use of nitrogen as a circulating carrier, it has a protective effect on dry materials. Nitrogen and other circulating carriers play a role in carrying, removing, and circulating moisture, and their carrier media can be reused. However, conventional conventional centrifugal spray drying achieves the purpose of moisture removal through continuous air supply and exhaust, and its tower is controlled by negative pressure operation, which is also the obvious difference between explosion-proof closed centrifugal spray drying system and conventional centrifugal spray drying system. Therefore, the explosion-proof closed cycle centrifugal spray drying system is suitable for drying organic solvent materials, toxic gas materials and materials prone to oxidation in the drying process.

▲ New technical theory of explosion-proof closed cycle centrifugal spray dryer:

(1) The closed circulation system is applied to the explosion-proof centrifugal spray dryer;

(2) The application of pressure differential automatic transmission and online oxygen detection technology makes the system safer and product quality more guaranteed;

(3) Application of intelligent automatic control technology to traditional centrifugal sprayDrying equipmentUpgraded;

(4) Innovative mechanical seal leak free technology has effectively solved the leakage problem of such systems.