Boiling dryer, also known as fluidized bed, is a kind of equipment used to dry materials. The following is a detailed introduction to it:

I. Basic composition

Boiling dryer is generally composed of heater, fluidized bed main engine, cyclone separator, bag dust collector (optional according to the nature of materials), induced draft fan, console, etc. In addition, it also includes parts such as material truck, control valve, primary filter, sub-high efficiency filter, feed pump, muffler and so on.

Second, the working principle

Boiling dryer uses air heated by heat exchanger to form hot air which is distributed through valve plate and enters the main engine. Wet material enters the dryer from the feeder, and due to the action of wind pressure, the material forms a boiling state in the dryer and makes extensive contact with hot air, thus completing the drying of the material in a short time. It is also said that its working principle is to divide the drying of wet materials into two steps: the raw materials are first dried by the mixed gas of the second-stage drying and the radiator, and the used low-temperature and high-humidity tail gas is discharged outside the machine; The dried semi-finished products are dried by fresh hot air under secondary negative pressure, and the finished products are metered and packaged. The used high-temperature and low-humidity tail gas is used as primary drying, so as to complete a good cycle drying process, and the amount of supplementary hot air can be adjusted at will as needed.

Third, the equipment characteristics

It can improve fluidity, reduce dust flying and improve solubility through powder granulation.

Mixing, granulating and drying are completed in one machine.

Anti-static filter cloth is adopted, and the equipment is safe to operate.

The pressure relief hole is set, so that in case of explosion, the injury probability of equipment operators is small.

The equipment has no dead angle, the loading and unloading is light and fast, and it is washed clean, which meets GMP specifications.

The drying speed is fast and the temperature is low, which can ensure the product quality.

Fourth, the type of equipment

According to the appearance, boiling dryers are divided into horizontal and vertical categories:

Horizontal: also known as box-type boiling dryer.

Vertical: also known as high-efficiency boiling dryer.

In addition, there are XF series box-type boiling dryers and GFG high-efficiency boiling dryers.

V. Scope of application

Pharmaceutical industry: used for granulation and drying of tablets, granules, capsules and other materials.

Food industry: used for granulating and drying cocoa, coffee, milk powder, granular juice, condiments and other materials.

Other industries: drying and coating of powdery or granular wet materials in pesticide, feed, fertilizer, pigment and dye chemical industries.

Six, the operation matters needing attention

Granulator machinery and equipment should be cleared and maintained regularly, especially the granulating oven and boiling dryer should not run for more than 18 hours every day, which will cause the risk of ethanol dust explosion for a long time. Pharmaceutical companies working in three shifts suggest that each shift should be controlled within 6 hours, and 1 hour of downtime equipment should be reserved during the shift change.

Strengthen the management of workers' safety operation, safeguard the vital interests of workers and ensure the smooth progress of production. It is forbidden to work on duty after drinking, lack of sleep or be in a trance.

In the process of operation, check the temperature, pressure and other related parameters at any time, and handle the abnormal situation in time.

When working in a dry room, you must wear protective equipment such as a full-face mask, masks and earplugs to ensure personal safety.

To sum up, the boiling dryer has a wide range of applications and remarkable equipment characteristics, but it also needs to pay attention to related matters in the operation process to ensure the safe operation of the equipment and the personal safety of employees.