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Tomato Spray Dryer Food Processing

With the development of the food industry, more and more food ingredients are processed by spray drying. Various hydrophilic colloids and modified starches are being widely used in this field to improve the dispersibility, moisture absorption resistance and instant solubility of food ingredients. Tomato spray dryer are designed for dairy and food products, where the spray drying process is more difficult due to the high carbohydrate, fatty substances or protein content of these products. The equipment is used to produce a variety of products, which typically consist of ingredients such as whey powder, fruit or vegetable powder, spices, proteins and blended products.


The small scale spray dryer system works in a closed environment. The system uses inert gas (such as nitrogen) as the drying medium, which is suitable for the spray dryer food processing process of easily oxidizable, flammable and explosive materials, and is specially used for hydrocarbons (such as ethanol, Methanol, acetone, n-hexane, butanol, DMF, toluene, etc.) organic solvent suspension, no oxidation in the whole process, inert gas (such as nitrogen) can be recycled. The products produced by this machine have good consistency and can produce spherical materials, especially suitable for high-precision ceramics such as tungsten carbide, silicon nitride, nano-ceramics, and pharmaceutical intermediates. 

First, the principle of small scale spray dryer:

The system uses inert gas as the circulating gas, which has a protective effect on the dried materials and can be recycled. The circulating gas undergoes the process of carrying moisture, dehumidification, heating and drying, and the medium can be reused; nitrogen is heated by a heater and then enters the drying process. Tower, the liquid material is transported to the atomizer through the feeding pump, the powder material atomized by the atomizer is discharged from the bottom of the tower, and the evaporated organic solvent gas is under the negative pressure of the fan, and the dust trapped in the gas is passed through. After the cyclone separator and the small scale spray dryer tower are dedusted, the saturated organic solvent gas is condensed into a liquid and discharged from the condenser. The drying medium in the drying system is inert gas, and the inside is positive pressure operation to maintain a certain nitrogen content. If the internal pressure drops, the pressure transmitter will automatically control the air intake to ensure the system pressure balance. The air passes through the filter and heater, and enters the air distributor at the top of the drying tower, and the hot air enters the drying chamber uniformly in a spiral shape. The feed liquid is pumped from the feed liquid tank through the filter to the centrifugal atomizer at the top of the dryer, so that the feed liquid is tomato spray dryer into extremely small mist droplets. Dry in a short time to powdery finished product. The finished product is discharged from the bottom of the drying tower and the cyclone separator, and the exhaust gas is discharged by the fan.


The drying tower compartment of the spray dryer food processing has a built-in conveyor belt at the bottom. Concentrated product enters the drying tower compartment through a set of nozzles; specially designed air distributors will create an airflow pattern within the drying tower compartment that forces the particles down into the conveyor belt. Here the first stage of drying will be completed. Since the powder stays on the conveyor for a few minutes, there is enough time to complete the drying and cooling process of the powder while maintaining the desired powder temperature. The ability of small scale spray dryer to control and maintain the exact air temperature in the different parts enables precise processing of powder properties, which gives the equipment a wide range of options and flexibility for the product type and agglomeration structure that may be required to be obtained. Due to the perforated design of the conveyor belt, the drying air first passes through a "pad" of powder that has accumulated together, which acts as a filter layer, and finally through the perforated conveyor belt. Only a very small amount of particles on the conveyor belt will remain in the dry air.

Second, the characteristics of spray dryer food processing:

1. Prevent product oxidation and improve product quality.

2. It is easy to realize dust-free and aseptic operation.

3. The solvent in the feed liquid can be recovered.

4. Improve the preservation of aromatic ingredients.

5. It can dry combustible liquid or carry out cooling granulation.

6. It can dry materials with strong heat sensitivity.

7. It can achieve low pollution and no pollution.

8. The deodorizing device can be omitted.

9. It can achieve low temperature drying below 100 degrees Celsius. 

10. The drying speed is fast, generally only 5-15 seconds, with the characteristics of instant drying;

11. The drying process of the material is completed in a short time, which is suitable for drying heat-sensitive materials, and can maintain the color and fragrance of the material, and the purity and quality of the finished product are high. 

12. The production process is simplified, the operation control is convenient, and it is suitable for continuous production control. Liquids with a moisture content of 40%-90% can be dried into powder at one time, reducing the processes of crushing and screening. 

13. The product has good dispersibility, fluidity and solubility, and the particle size, bulk density and water content of the product can be adjusted within a certain range.


Third, Applicable materials for tomato spray dryer:

1. Beverage/food/spice

Chocolate, coffee, meat, mustard, spices, soy sauce, black tea

2. Dairy products

Nursing milk powder (infant milk powder), skim milk, whole milk, casein, cheese, cream, condensed milk, whey products

3. Wheat flour

Wheat flour for baking, baby cereal, sauce base, tomato soup base

4. Fruits/wild vegetables

Apple, Apricot, Avocado, Banana, Ginseng, Coconut, Cranberry, Garlic, Mango, Onion, Orange, Red Pepper, Pineapple, Strawberry, Tomato

5. Fatty powder

Non-dairy creamer, fish oil, lard, lecithin, mayonnaise, tallow, vegetable oil

6. Carbohydrates

Caramel, glucose syrup, corn syrup, honey, malt extract, molasses, sorbitol, various sugars

7. Protein foods

Stock, Egg, Fish Extract, Hydrolyzed Vegetable Protein, Hydrolyzed Yeast Powder, Whey Protein Concentrate

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