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Help CenterFermented Liquid Centrifugal Spray Dryer, Biological Fermented Liquid Spray Drying Equipment
Product Spotlights
2. Wide application
3. High product quality: The powder particle size, moisture content, and fluidity
4. Automatic control
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Overview of Centrifugal Spray Dryer:
The centrifugal spray dryer is the core equipment in modern industry for efficiently converting liquid materials into high - quality powders. Its working principle is that through a high - speed rotating centrifugal atomizer, the liquid raw material is instantly scattered and stretched to form a fine mist net. At the same time, hot air is precisely introduced into the drying tower and comes into efficient co - current or counter - current contact with the mist droplets, enabling the moisture to evaporate rapidly within a few seconds, and finally a uniform and dry powder product is obtained.
The essence of this process lies in "instant drying". With extremely high heat and mass transfer efficiency, even heat - sensitive substances (such as proteins, probiotics, or natural extracts) can be dehydrated at a relatively low temperature, thus maximally retaining their active ingredients and natural properties. By precisely controlling the atomizer rotation speed, inlet air temperature, and air flow pattern, operators can flexibly control the particle size, moisture content, solubility, and fluidity of the finished powder to meet the strict requirements of numerous fields, from food milk powder, pharmaceutical raw materials to high - end ceramic powders and nanomaterials.
Therefore, the centrifugal spray dryer is not only a drying technology but also a precise powder manufacturing system. It realizes an elegant transformation from "liquid" to "powder" in an efficient, continuous, and controllable industrial way and is an indispensable key link in modern production lines that pursue product quality and process efficiency.
Flow Chart of Centrifugal Spray Dryer System
Application of Spray Dryer in the Supply of Fermentation Broth Drying:
Spray drying converts liquid fermentation products (bacterial cells, metabolites, enzymes, etc.) into stable powders in one step and is mainly applied to the following types of products:
Microbial Agents (Bacterial Powders)
Probiotics: This is the most classic application. The fermentation broth of probiotics such as lactic acid bacteria and bifidobacteria is centrifugally concentrated and then mixed with protective agents (such as skim milk powder, oligosaccharides, and trehalose) for spray drying. Despite the thermal damage, by optimizing the process (such as low - temperature and high - air - volume operation and using vitrified matrices), bacterial powders with a relatively high viable cell survival rate can be obtained for use in food, health products, and animal feed.
Industrial Bacterial Agents: Such as nitrogen - fixing bacteria for agriculture, phosphate - solubilizing bacteria, and sewage treatment bacterial agents. For these products, a certain viable cell rate is required, but cost and output are crucial. Spray drying can produce solid bacterial agents that are easy to store, transport, and use at a relatively low cost.
Enzyme preparations
Industrial enzymes produced by fermentation (such as amylase, protease, cellulase) can be directly spray-dried into enzyme powder after preliminary filtration or ultrafiltration concentration. During the drying process, part of the enzyme activity will be lost. However, by adding stabilizers (such as salts, polyhydroxy compounds) and controlling a lower outlet air temperature, the enzyme activity can be maximally maintained. The obtained enzyme powder has good stability and is convenient to use.
Microbial metabolites
Antibiotics: The fermentation broths of some antibiotics that are relatively stable to heat (such as streptomycin, bacitracin) can be spray-dried after pretreatment and used as crude products or feed additives.
Organic acids (such as citric acid, lactic acid): After removing the bacterial cells from the fermentation broth, it can be made into a convenient powder form by spray drying.
Biopolymers (such as xanthan gum, gellan gum): After the fermentation broth is recovered by alcohol precipitation, spray drying is the final step to obtain standard commercial powder products.
Yeast extract/feed yeast: After the yeast fermentation broth is inactivated and autolyzed, spray drying is the key process for producing high-value condiments or feed protein powder.
Fermentation whole broth products
In some feed additive fields, in order to maximally retain all the nutrients in the fermentation broth (including bacterial cells, unconsumed culture medium, metabolites), after being adsorbed by carriers (such as adsorbing the fermentation broth with bran, corncob powder, etc.), spray drying is then carried out to produce compound microbial feed additives.
Industries suitable for centrifugal spray drying:
Food industry
Production of milk powder, soybean milk powder, coffee powder, fruit juice powder, egg powder, yeast, and fruit and vegetable powder.
Drying of seasonings (such as soy sauce powder, yeast extract) and food additives (flavors, pigments).
Low-temperature drying of functional foods (probiotics, enzyme preparations) to protect active ingredients.
Pharmaceutical industry
Drying of raw materials such as antibiotics, vitamins, and traditional Chinese medicine extracts.
Preparation of spray-dried microcapsules for drug slow-release or taste masking (such as granules, capsule fillings).
Chemical engineering and materials
Granulation of dyes, pigments, ceramic powders, catalysts, and polymer particles (such as PVC, PE).
Preparation of precursors for nanomaterials and battery cathode and anode materials (such as lithium battery materials).
Environmental protection and bioengineering
Sludge drying in wastewater treatment and immobilization of microbial preparations (such as biopesticides).
Drying of bioactive products such as enzymes and single-cell proteins.
Other industries
Cosmetics (foundation, talcum powder), ceramic glazes, wettable pesticide powders, etc.
Technical parameters of centrifugal spray dryer
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