The spray dryer is a type of continuous atmospheric dryer in operation. In the process of operation, its special equipment is used to spray the liquid into a mist, so that it can be contacted with hot air and be Dry, when used, can be used to dry heat-sensitive liquids, viscous liquids, and suspensions such as milk, eggs, tannins, and drugs. It is also used for drying fuels, intermediates, soap powders and inorganic salts.
Spray dryer operating principle
During the operation of the spray dryer, its air is effectively filtered and heated, so that it can effectively enter the top air distributor of its dryer to a certain extent, and its hot air can be effectively used during operation. The spiral atomizer enters into the drying chamber, and the high-speed centrifugal atomizer for the material liquid passing through the top of the tower body during the use, and the (rotation) spray is formed into fine mist-like liquid beads, and is in contact with the hot air in the current. Can be dried to a finished product in a short time. The finished product is continuously output from the bottom of the drying tower and the cyclone separator, and the exhaust gas is evacuated by the induced draft fan.
Spray dryer product introduction
Spray dryers are best suited for the efficient production of powdered and granular fixed products from solutions, pastes, suspensions, and emulsions during operation. Therefore, when the finished product has a particle size distribution, residual moisture content, When the bulk density and particle shape must meet exacting standards, spray drying is a very desirable process.
Spray dryer performance characteristics
1. The spray drying machine has a fast drying speed. During the operation process, the material liquid will greatly increase its surface after atomization. Instant evaporation of 95% to 98% of the moisture can be achieved in the hot air stream. The drying time is only a few seconds, especially suitable for the drying of heat-sensitive materials.
2. The spray dryer will have good uniformity, solubility, and fluidity to a certain degree, and the product will be of high purity and good quality when it is operated.
3. The biochemical process of the spray dryer is simple and easy to operate. When used, the liquid containing 40-60% moisture (up to 90% of special materials) can be dried into a powder product at one time. It is convenient for control and management.
To a certain extent, a spray dryer is a device that can perform drying and granulation at the same time. According to the process, the pressure ball can automatically adjust the pressure of the feed liquid pump, the size of the spray hole, and the flow rate. Get the desired spherical particles in a certain size ratio. The spray dryer is a type of continuous atmospheric dryer. The liquid material is sprayed with a special device into a mist, and it is brought into contact with hot air and dried.