How to improve the spray drying effect of spray dryer?

 Spray dryer is a kind of continuous atmospheric pressure dryer. Special equipment is used to spray the liquid material into a mist, so that it is dried in contact with hot air. It is used for drying to generate powdery and granular solid products such as amino acids, proteins, ceramics and pharmaceuticals from solutions, emulsions, suspensions and pumpable pasty liquid raw materials, as well as intermediates, food dyes, whiteners and plastic resins.

  The air is filtered and heated and enters into the air distributor at the top of the dryer, and the hot air enters into the drying chamber uniformly in spiral shape. The material liquid is sprayed into very fine mist liquid beads through the high-speed centrifugal atomiser at the top of the tower (rotating), and contacted with the hot air in parallel flow, and can be dried into finished products in a very short time. The finished product is continuously output from the bottom of the drying tower and cyclone separator, and the exhaust gas is exhausted by the fan.

  Spray dryer drying speed, the material is atomised, the surface area is greatly increased, in the hot air stream, can instantly evaporate 95% -98% of the water, the completion of the drying time is only a few seconds, especially for heat-sensitive materials drying.

  Spray dryer has good uniformity, fluidity and solubility, high purity and good quality products. The production process is simplified and the operation control is convenient. For the moisture content of 40-60% (special materials up to 90%) of the liquid can be dried into powder products, drying without crushing and screening, reduce production processes, improve product purity. The product particle size, bulk density, water, within a certain range can be adjusted by changing the operating conditions, control and management are very convenient.

  The spray drying process is completely dependent on the product of the composition. Some are very easy and others very difficult to dry. In this connection, it should be noted that it is necessary to ensure the longest possible operating time before it is necessary to stop cleaning the plant.

  The total moisture content of the expelled air is one of the important parameters. It depends on the product of the composition, e.g. a high total moisture content in the discharge air allows drying of products with a high protein content, whereas a high carbohydrate content requires a low moisture content in order to avoid sticking to the chambers, ducts and cyclone powders. This is why the total moisture content in the ambient air is an important parameter to know before the plant is designed, as to reduce the ‘drying potential’ if the total moisture of the ambient environment is high. 2.

Another important parameter to know is the solids content in the concentrate. This is viscosity driven and therefore also depends on the product of the composition.

   In the process of using the equipment, sometimes there will not be able to dry, or the drying effect is not good, this time should be how to solve it?

In response to the spray dryer does not dry or does not warm up, it is recommended that the user can first carry out some checks on the equipment themselves to check the severity of the problem, if it is a problem that can be solved by yourself, you can solve it by yourself in time. But if the problem is not caused by the airflow, what should be done? Suggest that users can refer to the following practices, I hope to help you.

1, check whether the hose is clogged or bent, so the hose is clogged or bent will affect the air flow out of the device, once the air circulation is not good, the dryer can not be normal temperature, which in turn affects the drying effect.

2, if confirm that the hose is not blocked or bent, then check whether the material is overloaded, because once the material is overloaded, it is easy to cause the machine blocked, the air is no way to free circulation.

3, once the dryer is overheated, it will also affect the performance of the machine, and even damage indicated. If the thermal overload has been cut off, you can carry out a simple reset. If it is found that the equipment has been damaged more seriously, then it is necessary to want to find a professional maintenance personnel to deal with the problem.

Users need to note that in the ordinary use of equipment in the process should also pay attention to the maintenance and maintenance of spray dryer, so that the machine to maintain a long and stable operation of the state, better service to the production.