Milk Powder LPG Spray Dryer Steam Energy Saving Environmental Protection

Product Specification

1. The general production process of milk powder is as follows: acceptance of raw materials → pretreatment and standardization → concentration → spray drying → cooling storage → packaging → finished product
2. Acceptance and pretreatment of raw milk
3. Batching: In the production process of milk powder, except for a few varieties (such as whole milk powder and skim milk powder), all products must go through the batching process, and the batching ratio is determined according to the product requirements. The equipment used for batching mainly includes batching tank, water-powder mixer and heater.
4. Homogenization: When producing whole milk powder, whole sweet milk powder and skim milk powder, it is generally not necessary to go through homogenization operation, but if diced vegetable oil or other materials that are not easy to mix are added to the ingredients of milk powder, homogenization operation is required. The pressure during homogenization is generally controlled at 14-21 MPa, and the temperature is preferably controlled at 60℃. After homogenization, the fat globules become smaller, which can effectively prevent the fat from floating and is easy to digest and absorb.
5. Sterilization: Different products can choose appropriate sterilization methods according to their own characteristics. The most common method nowadays is to use high temperature short-time sterilization, because this method results in less loss of nutrients in milk and better physical and chemical properties of milk powder.
6. Vacuum concentration: After sterilization, the milk is immediately pumped into a vacuum evaporator for decompression (vacuum) concentration to remove most of the water in the milk (65%), and then enters the drying tower for spray drying to improve product quality and reduce costs. Generally, the raw milk is required to be concentrated to 1/7 of the original volume and the dry matter of the milk reaches about 45%. The temperature of the concentrated milk is generally 47-50℃, and the concentration levels of different products are as follows: Whole milk powder concentration: 11.5-13 degrees Baume; corresponding milk solid content: 38%-42%. Skim milk powder concentration: 20-22 degrees Baume; corresponding milk solid content: 35%-40%. Individual fat sweet milk powder concentration: 15-20 degrees Baume, corresponding milk solid content: 45%-50%, and the concentration of concentrated milk is increased when producing large-particle milk powder.
8. Spray drying: Concentrated milk still contains a lot of water, and it must be spray dried to get milk powder.
9. Cooling: In equipment without secondary drying, cooling is required to prevent fat separation, and then it can be packaged after sieving (20-30 mesh). In equipment with secondary drying, the milk powder enters the cooling bed after secondary drying and is cooled to below 40°C. Then it is sent to the milk powder warehouse through the powder sieve for packaging.

From the acceptance of raw materials, this is a step. After getting the milk, it is necessary to purify the milk and initially remove some bacteria and even some impurities. There is a cooling storage, which is a continuous work. After that, there is a batching process. According to the requirements of the formula, the required microorganisms, trace elements, and various auxiliary materials are added as a batching.

Product Introduction:
Centrifugal spray dryer has high automation, convenient operation and good product quality. It is suitable for solutions, emulsions, suspensions and even viscous liquid materials.
The so-called centrifugal spray dryer is to use a centrifugal atomizer to dry certain liquid materials. It is one of the most widely used dryers in industrial production. Spray drying is the most widely used process in liquid process forming and drying industry. It is most suitable for generating powder and granular products from solutions, emulsions, suspensions and pumpable lake-like liquid raw materials. Therefore, when the particle size distribution, residual moisture content, bulk density and particle shape meet precise standards, spray drying is a very ideal process.

Product function:
1 Fast drying speed, the surface area of ​​the liquid is greatly increased after atomization, and 95%-98% of the water can be evaporated instantly in the hot air flow. It takes only 5-15 seconds to complete the drying process, with the characteristics of instant drying.
2 The special air distribution device reduces the equipment resistance and effectively provides the dryer with a processing air position.
3 The production process is simplified and suitable for continuous control production. Liquids with a moisture content of 40-90% can be dried into powder at one time, reducing crushing, screening and other processes to improve product purity.
4 The material completes the drying process in a short time, which is suitable for drying heat-sensitive materials and can maintain the color, aroma and taste of the material.
5 The product has good dispersibility, fluidity and solubility, and the product particle size, looseness and moisture content are adjustable within a certain range.

Application range:
1 Food industry: dense milk powder, gram protein, cocoa milk powder, milk substitute, pig blood powder, egg white (yellow), etc.
2 Food and plants: oats, chicken juice, coffee, instant tea, spiced meat, protein, soybean, peanut protein, hydrolyzate, etc.
3 Sugars: corn syrup, corn starch, glucose, pectin, maltose, potassium sorbate, etc.
4 Plastic resin: AB, ABS emulsion, urea resin, phenolic resin, dense glue (urea) formaldehyde resin, polyethylene, polyvinyl fluoride, etc.
5 Chemical industry: sodium (potassium) fluoride, alkaline dye pigment, dye intermediate, compound fertilizer, formaldehyde silicate, catalyst, sulfuric acid agent, amino acid, white carbon black, etc.
6 Ceramics: alumina, tile materials, magnesium oxide, talcum powder, etc.

Technical specification:

Note: The amount of water evaporation is related to the characteristics of the material and the hot air inlet and outlet temperatures. When the outlet temperature is 90oC, the water evaporation curve is shown in the figure above (for model selection reference). As the product is constantly updated, the relevant parameters will change without prior notice.

Ordering instructions

◎Name and physical properties of the material liquid: solid content (or water content), viscosity, surface tension, and PH value.

◎Powder capacity after drying, allowable residual moisture content, particle size, and allowable maximum temperature.

◎Output and daily opening hours.

◎Available energy: available steam pressure, electrical capacity, available coal, oil, and gas.

◎Control requirements: Whether the inlet and outlet temperatures need to be controlled automatically.

◎Powder collection requirements: Whether to install a bag trap and environmental requirements for exhaust gas emissions.

◎Other special requirements.