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mini spray dryer
mini spray dryer lab spray dryer

1. The beating and color protection of bananas. Choose ripe, non-rotted bananas, peel them, cut them into sections, and put them in clean water immediately.

2. Then use two methods of cold beating and hot beating. Use different doses of 3 color preservatives or mixed color preservatives, and observe the color change of the slurry separately.

3. Spray drying test. The test observation items include spray liquid concentration, selection of additives, dosage of additives, feed rate, inlet temperature, outlet temperature, etc.

4. Product quality and product analysis and testing. Mainly observe the powdering condition, color, taste, water content, solubility, etc. of the product; analyze and test the total sugar, protein, crude fiber, amino acid, mineral elements and toxic elements.

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The spray drying of laboratory spray dryers is a common drying method currently on the market. There have been many results in the complexity of the spray drying process. The low thermal efficiency of spray drying has left equipment researchers and the business community with great research and development. Space needs to continuously improve its processes and processes to meet the needs of the market and the product itself. Starting from the analysis of the research status of spray dryers, the new research results and the development of equipment and technology in the field of laboratory spray dryers are introduced, and the current relatively new research topics and directions are summarized and proposed.

Laboratory spray dryer technology can dry solutions, suspensions, emulsions, etc. The resulting product has small particle size, uniformity, good fluidity and instant dissolution, and has been widely used in many fields such as food, pharmacy, chemical industry, and environmental protection. The article mainly discusses the spray drying process, the type of laboratory spray dryer equipment and the application of spray drying technology.

The laboratory spray dryer uses an atomizer to disperse the material liquid into fine droplets, and the process of quickly evaporating the solvent in the thermal drying medium to form a dry powder. Generally, spray drying is divided into four stages: material liquid atomization; mist group Contact and mix with hot drying medium; evaporation and drying of droplets; separation of dried product from drying medium. The raw material liquid can be a solution, emulsion or suspension, or a liquid form that can be transported by a pump such as a melt or a paste. The product is in the form of powder, granules, hollow spheres or pellets.

Laboratory spray dryers have a very wide range of applications, suitable for food, pharmaceuticals, milk powder, egg yolk, soy sauce, coffee, starch, protein, hormones, serum, antibiotics, enzymes, spices, extracts, organic chemistry, waxes, dyes , Detergents, surfactants, pesticides, preservatives, synthetic resins, pigments and other inorganic chemistry fields, ferrites, ceramics, powders for copying, magnetic materials, metal powders, photosensitive materials, various industrial chemicals, sample waste, etc. Various fuel cell development fields for automobile and ship propulsion.

In laboratory spray dryers, the nutrients of some plants will be lost due to high temperature. For these plants, freeze-drying is an effective method of concentrated preservation. However, some plants do require a certain temperature to remove toxicity. For these plants , Spray drying technology is ideal. Taking soybeans as an example, the concentration process requires a certain temperature to remove a substance called trypsininhibitors.

Laboratory spray dryers are often a step in the manufacturing process. Laboratory spray dryers change the substance from liquid to powder through continuous spraying, mixing and drying. Among the many technologies for storing food, spray drying has its unique advantages. Because the temperature used in this technology is not very high, it can effectively retain the taste, color and nutrition of the food while removing microbial contamination.

The air passes through the filter and heater and enters the air distributor on the top of the laboratory spray dryer. The hot air enters the dryer evenly in a spiral shape. The material liquid of the laboratory spray dryer is pumped from the material liquid tank through the filter to the centrifugal atomizer on the top of the dryer. The laboratory spray dryer sprays the material liquid into very small mist droplets. The material liquid and hot air are combined Flow contact, the water evaporates quickly, and it is dried into a finished product in a very short time. The finished product is discharged from the bottom of the drying tower and cyclone separator, and the exhaust gas is discharged by the fan.

Spray drying is usually used to remove water from raw materials. In addition, the laboratory spray dryer has many other uses, such as: changing the size, shape or density of the substance. The laboratory spray dryer can assist in adding other ingredients during the production process, which helps to produce strict quality standards. product.

A brief introduction to the technical process and application of laboratory spray dryers. Holves is committed to the development and production of spray dryer equipment. After years of hard work, it has rich engineering experience. At the same time, the company has a group of professional technical teams to provide customers with A series of services from professional industrial design to equipment production, installation and commissioning. If you want to know more about spray dryers, please continue to pay attention.

bjholves fermeter

The development of Bioreactor was developed with the development of Bioreactor products and fermentation engineering. The oldest Bioreactor can be traced back to winemaking in ancient times. The ancients used clay pots to make wine. The clay pot is the ancient anaerobic Bioreactor. +If starting from the development history of the fermentation industry, the development history of Bioreactor can be divided into four stages:

The first stage: the first stage from before 1900, at this time because the products are only wine and vinegar. So most of them are anaerobic Bioreactor.

The second stage: from 1900 to 1940 is the second stage. At this stage, when yeast, glycerin, citric acid, lactic acid and other products appeared, there was an aerobic Bioreactor.

The third stage: from 1940 to 1970 is the third stage. With the development of the antibiotic industry, Bioreactor have developed rapidly. At this time, the enlargement of the Bioreactor and the development of the Bioreactor have become a major part. The production of Bioreactor has a professional company for serial production. The volume range is divided into three levels. The laboratory scale is 1L to 50L. The scale of the pilot plant is 50L-5000L. The production scale is above 5000L. Among them, 1L to 10L tanks mostly adopt glass tank structure. Multiple units are put together on the experimental platform to run, and a set of reliable experimental results can be obtained quickly for the amplification of the fermentation tank. At that time, the famous international manufacturers were: West German Braun Company (B.Braun); American N.B.S (New_Braunwick+Scientific+Co.Inc). Japan Marubishi Corporation (B.E.Marubishi)

The fourth stage: From 1970 to the present + 1970s, the success of DNA recombination technology marked the birth of modern biotechnology. The development of Bioreactor has also reached a new era. Since the 1990s, the development of animal cell tanks has diversified the production of fermentation tanks, and the control technology of Bioreactor has become more advanced, such as online gas analyzers and online automatic sampling analysis devices. Make the Bioreactor more perfect.

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bjholves fermeter-2

The cleaning of glass bioreactor tanks is more important, and we are constantly striving to improve the cleaning technology of bioreactor tanks in order to make glass bioreactor tanks work for us. The most common cleaning method used in modern breweries is cleaning in place (CIP), which means that the equipment and pipelines are cleaned and sterilized under airtight conditions without disassembling the parts or pipes of the equipment.

Equipment such as bioreactor tanks cannot be cleaned by filling them with cleaning fluid. The in-situ cleaning of the fermenter is carried out through the scrubber cycle. The scrubber has two types: fixed ball type and rotary jet type. The cleaning fluid is sprayed onto the inner surface of the tank through the scrubber, and then the cleaning fluid flows down the tank wall. Generally, the cleaning fluid will form a film attached to On the tank wall. In this way, the mechanical effect is very small, and the cleaning effect is mainly achieved by the chemical action of the cleaning agent.

The fixed ball-washing scrubber has an action radius of 2m. For horizontal bioreactor tanks, multiple scrubbers must be installed. The pressure of the washing liquid at the nozzle outlet of the scrubber should be 0.2~0.3 MPa; for vertical bioreactor tanks and pressure measuring points In the case of the outlet of the washing pump, not only the pressure loss caused by the pipeline resistance, but also the influence of height on the cleaning pressure must be considered. When the pressure is too low, the action radius of the scrubber is small and the flow rate is not enough, and the sprayed cleaning liquid cannot cover the tank wall; when the pressure is too high, the glass bioreactor tank cleaning liquid will form a mist and cannot form a downward flow along the tank wall The water film or sprayed cleaning fluid is bounced back by the tank wall, reducing the cleaning effect.

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Bioreactor be simply defined as the use of microorganisms to transform one substance into another. The most commonly used microorganisms are bacteria, yeasts, molds, etc. Microbial food and required products exist in the form of slurry, with a viscosity ranging from 2000 to 3000 cp (2 to 3 pa·s), which is called glue or fermentation broth. The microorganisms in the fermenter produce the required products by taking decomposable materials as food under aerobic conditions.

From the perspective of mixing, the fermenter involves gas dispersion, solid suspension, heat transfer, and uniform mixing. Each kind of fermentation has its unique features, therefore, the best structure of the agitator should be carefully studied. The most important issue is usually the transfer of oxygen from the air to the fermentation slurry and the transfer of oxygen from the slurry to the microorganisms. Microbes can only use oxygen at a certain respiration rate, which is similar to human respiration. Bioreactor must be able to provide a good aerobic environment to meet the needs of microbial respiration rates.

The maximum shear stress that each microorganism can bear is different. Yeasts and bacteria are single-celled plants and very small. Yeasts are irregularly ovoid with a diameter of about 0.004~0.01mm. Bacteria are even smaller. Most of the bacteria have a maximum size of less than 0.007mm and have a variety of shapes. Many bacillus are rod-shaped, yeast proliferate through germination, bacteria proliferate through double division, and molds are multicellular filaments that proliferate through the vegetative growth of hyphae. This kind of mycelial growth structure of mold inevitably makes the mold very sensitive to shearing. The maximum shear force generated by the agitator should be carefully studied to avoid hindering the growth of these microorganisms.

With the increase in the output of antibiotic products, the single tank volume of the fermentation tank tends to be large-scale, and many new problems have been raised for the designer of the fermentation tank. We should make the structure and stirring form of large-scale fermentation tanks more suitable for the microbial metabolism process in fermentation production, increase the oxygen transfer rate in the fermentation broth, and increase the fermentation production level. This is the eternal theme of the large-scale fermentation tank designers.

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The long-term use of centrifugal spray drying equipment is inevitable. It’s not that the quality of the products produced by the manufacturer is problematic. No matter what is used for a long time, there will be some minor problems. Although it will not affect the work for a while, if it is not handled in time, minor faults will become It’s a big problem, so it’s important to learn some simple centrifugal spray drying equipment maintenance methods by yourself:

1. The nozzle speed is too low and the evaporation rate is too low. The main reason is the analysis of the damage of the centrifugal nozzle assembly, so stop using the nozzle and check the inside of the nozzle. The possible analysis is: reduction of air volume in the entire space, low temperature of hot air inlet, equipment leakage, cold air entering the drying room, etc. Remedy: Check whether the normal speed centrifuge.

2. The improper dust removal of the pulse bag filter:
1) improper selection of cloth bag;
2)clogged or damaged cloth bag;
3) too long pulse period;
4) poor grounding;
5) damaged pulse valve.

1) Choose a cloth bag with higher filtration accuracy;
2) Clean or replace the cloth bag;
3) Adjust the cycle of back blowing;
4) Check the grounding wire;
5) Replace the pulse valve.

3.If it is equipped with a water-foam dust collector, water will spray at the air outlet of the water-foam dust collector.

Analysis: The water retaining net is blocked.
Answer: Clean or replace the water retaining net.

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bjholves fermeter

1. If the joint of the inlet pipe and the outlet pipe leaks air, when the problem is not solved by tightening the joint, add or replace the packing.

2. The pressure gauge and safety valve should be checked regularly, and if there is any malfunction, they should be replaced or repaired in time.

3. When cleaning the fermentation tank, please use a soft brush to scrub, do not scratch with a hard tool, so as not to damage the surface of the fermentation tank.

4. The supporting instrument should be checked once a year to ensure normal use.

5. Electrical appliances, meters, sensors and other electrical equipment are strictly prohibited from directly contacting water and steam to prevent moisture.

6. When the equipment is out of use, it should be cleaned in time to drain the remaining water in the fermentation tank and various pipes; loosen the fermentation tank cover and hand hole screws to prevent deformation of the sealing ring.

7. Carbon steel equipment such as operating platforms and constant temperature water tanks should be painted regularly (once a year) to prevent corrosion.

8. Check the oil level of the reducer frequently. If the lubricating oil is insufficient, increase it in time.

9. Regularly replace the lubricating oil of the reducer to extend its service life.

10. If the glass fermentation tank is not used temporarily, it is necessary to empty the fermentation tank and drain the remaining water in the tank and in each pipeline.

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Spray Dryer,Mini Spray Dryer
Mini Spray Dryer

The dry bulk density of a spray dryer is also called bulk density, which plays a decisive role in the drying effect of the product, so determining the dry bulk density is a very important task. Generally, when designing a spray dryer, the dry bulk density should be set. Only in this way can the product achieve a better drying effect. The dry bulk density of the spray dryer can not be determined casually, and various comprehensive factors should be considered when determining, as follows:

Equipment type

If a parallel-flow spray dryer is used, products with higher bulk density can be obtained, so choose according to actual needs.

The influence of additives

If you want to obtain products with low bulk density, such as instant coffee, instant tea, some paint powder, etc., you can add nitrogen or carbon dioxide into the dry material. However, if you add inorganic salt, such as sodium chloride, the bulk density will increase, so you should add it carefully and not add it wrong, because it may have an adverse effect.

Feed concentration

The feed concentration is directly proportional to the bulk density. The lower the feed concentration, the lower the bulk density, and the smaller the production capacity.

Hot air and exhaust air temperature

If the temperature difference between hot air and exhaust air temperature is larger, the bulk density of the product will be lower; if the temperature difference is small, the bulk density will be higher. However, the temperature difference cannot be too small. Because the temperature difference is small, the amount of air required is large, which increases the required power and heat energy, which will adversely affect it, so it cannot be too small.

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bjholves fermeter

There are many types of fermenter/bioreactor. The common function of different fermenter/bioreactor is to understand literally. It is used for fermentation objects, but the specific functions are slightly different. Today I introduce the role of two commonly used fermentation tanks commonly used in industrial fermentation.

Tower fermenter/bioreactor: This is a multi-layer tower structure, after the gas dispersion effect, oxygen is introduced into the tank body to ferment the fermentation broth, the same, there are requirements for strains. Mechanical stirring type: The fermentation tank has excellent sealing, which makes a sterile system inside its tank body, which can allow many specific bacteria to multiply inside.

Self-priming fermenter/bioreactor: This is a fermentation method realized by high-speed rotation of the impeller inside the tank. Through the rotation of the impeller, the air is sucked into the tank, and the high-speed rotation will form a vacuum state, so it is only suitable for bacteria that do not require high oxygen content.

Different types are inseparable from the following four structures:

1. Fermentation tank

2. Stirring system, including: driving motor, stirring shaft; turbine stirrer, stirring blade; baffle; shaft seal (end face shaft seal).

3. Heat transfer system, including: interlayer heat transfer, coil heat transfer (generally there are 4 groups, 6 groups, 8 groups).

4. Ventilation system, including single-hole tube and porous ring tube.

The specific operation of the fermenter is similar:

1. First turn on the power switch and system switch in order.

2. After the control computer enters the startup interface, select the administrator and enter the password to log in to the system.

3. Select the sterilization control option, set the sterilization temperature to 121℃, and the time to 30min.

4. Open the pure steam master valve, sampling port intake valve, sampling port steam exhaust valve, seed transfer pipeline inlet valve and seed transfer pipeline exhaust valve, and sterilize the sample port and seed transfer pipeline.

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  1. The spray dryer should be easy to operate and maintain, easy to clean and disinfect. Not only to prevent outsiders and miscellaneous bacteria from flowing outside, but also to have online cleaning and online sterilization functions.
  2. The material of the contact part of the spray dryer equipment and the material should be non-toxic, corrosion-resistant, not chemically react with the material, and must not have easy-to-shed coatings, fibers and particulate materials.
  3. The inner wall of the spray dryer equipment must be smooth and flat, without concave structure, and all corners should be rounded.
  4. The spray dryer is driven steadily, and noise, dust, and sewage discharge should comply with the relevant national regulations.
  5. The spray dryer itself has good airtightness, and all lubricants and coolants should avoid contact with materials and packaging containers.
  6. Models: Open circulation, vertical down-flow type, high-speed centrifugal rotary disk spray dryer is recommended, especially for Chinese medicine. If the particle size of the dry powder is required to be above 100 mesh (150μm), a pressure nozzle spray dryer can be selected.
  7. In order to meet the hygienic requirements, the air entering the tower must be sterilized and filtered. Except for the injection level of 100, the purification degree can be considered as 100,000…300,000. The drying tower should be operated under a slightly positive pressure. The finished product is output at the lower part of the cone of the drying tower, and the finished product is collected and packed in a clean room.
  8. In order to ensure that the exhaust gas emission concentration meets environmental protection requirements, secondary dust removal should be considered. In the first stage, high-efficiency cyclone separators are used for dry powder recovery. In the second stage, dry bag filters or wet dust collectors can be used for tail powder recovery. For dryers with strong hygroscopicity and multi-variety production, wet dust collectors are more suitable.
  9. If you want to know more about the spray dryer,Please continue to follow Holves or Whatsapp/wechat:+8618610459929
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