The medicinal value of Dendrobium officinale, also known as Black Knot Grass or Immortal Grass, is evident. As a perennial herbaceous plant with a sweet taste and a cold nature, Dendrobium officinale mainly belongs to the stomach and spleen meridians, and has various benefits to the human body. Dendrobium extract is an active ingredient extracted from the traditional Chinese medicinal herb Dendrobium, mainly containing polysaccharides, alkaloids, and other substances.

One Principle of spray dryer for Dendrobium officinale extract

After being heated by the heater, the air enters the hot air distributor at the top of the drying tower through the blower. After passing through the hot air distributor, the hot air uniformly enters the drying tower and moves in a spiral shape. At the same time, the feed pump sends the feed liquid to the centrifugal spray at the top of the drying tower, and the feed liquid is sprayed into tiny mist droplets. The surface area of the material liquid in contact with hot air is greatly increased, and the moisture evaporates rapidly, drying it into a dry product in a very short time. Dry products are separated from humid air by a cyclone separator, and the dry air is sent to a small cyclone separator for separation through the aggregate cyclone chamber at the bottom of the cyclone separator, and collected in a collection cylinder. The exhaust gas is discharged through a induced draft fan. The hot air system, blowing system, and air delivery system of the dryer are all equipped with filters such as primary efficiency, medium efficiency, and sub high efficiency. All air entering the drying system is filtered and treated. All parts in contact with the material are made of stainless steel, which meets GMP requirements.

II Characteristics of spray dryer for Dendrobium officinale extract

1. To prevent material from sticking to the wall, the equipment is equipped with air sweeping and tower wall jacket cooling structures, which can effectively prevent product sticking and coking, and improve product quality and yield.

2. The finished product air delivery system separates the dried finished product from the hot and humid air in the system in a timely manner to avoid the possibility of moisture absorption and agglomeration of the finished product.

3. The air entering the dryer is purified in three stages to meet the requirement of 300000 level air intake;

4. Adopting a fast opening punching device, suitable for multi variety production requirements;

5. Material collection adopts two-stage cyclone dust removal device or one-stage cyclone dust removal+wet dust collector;

6. The volume and configuration of spray tower shall be adjusted adaptively according to the material properties to make it more practical;

7. To prevent materials from sticking to the wall, the equipment is equipped with air wall sweeping;

8. The design and production of the entire drying system comply with GMP standards;

III Advantages of spray dryer for Dendrobium officinale extract

1. Efficient and fast: The spray dryer can complete the drying process of plant extracts in a short time, greatly improving the production efficiency. The combination of its spray technology and hot air flow technology enables the water in the droplets to evaporate quickly, saving time and energy costs.

2. Retain active ingredients: spray dryer can control temperature and time during drying, so as to avoid long-term exposure to high temperature and reduce decomposition and loss of active ingredients. This is crucial for the quality of plant extracts, ensuring that the active ingredients are retained and resulting in better efficacy of the final product.

3. Strong controllability: The operating parameters of the spray dryer can be adjusted according to different plant extracts, such as spray speed, temperature, pressure, etc., to achieve the best drying effect. This controllability makes the production process more flexible, adaptable to different types of plant extracts, and improves product consistency and stability.

4. Expandability: The spray dryer can be expanded and adjusted according to the production demand. Whether it is small-scale laboratory research or large-scale industrial production, demand can be met by increasing the number of equipment or adjusting operating parameters. This scalability makes the spray dryer an ideal choice in the plant extraction industry.

5. Good drying effect: the spray dryer can produce even and fine plant extract powder with good solubility and solubility, which is convenient for subsequent processing and application. The rapid evaporation characteristics during the drying process can reduce the agglomeration and adhesion between powders, ensuring the quality and flowability of the final product.

4 Technical requirements of spray dryer for Dendrobium officinale extract

1. Material name: Dendrobium officinale extract;

2. Liquid processing capacity: 150-200kg/h

3、 溶液温度： 45～65℃

4. Water evaporation rate: 150kg/h

5. Product quantity: 30~45 kg/h

6. Product moisture content: 3-5%

7. Inlet air temperature: adjustable from 160-230 ℃

8. Air outlet temperature: adjustable from 80-120 ℃

9. Air heating method: steam+electricity (steam pressure P=0.6MPa)

10. Atomization method: High speed centrifugal atomization (variable frequency atomizer, around 15000-18000 revolutions per minute)

11. Discharge method: Bottom discharge of cyclone separator

12. Dust removal method: Wet dust collector

13. Equipment material requirements: The material in contact with the material should be 304

14. Cooling method: Ice water device cooling