Soybean Extruder,Expander

This expander can transfer mechanical energy to thermal energy by extrusion, friction and shearing function of non-equidistance screw extrusion system, and form a certain pressure and temperature in the extruding chamber, so material is sprayed out from the discharging die head to be expanded and formed.

III. Usage and features

This expander is the single equipment integrated in raw material feeding, heating and extruding.

1. Application in oil mills

Crude oil manufactured by extruding and extracting technology is of light color and low acid value, it is easy to make advanced cooking oil in different levels; and bulk weight of material increases after being expanded, so that production capacity of extractor can be greatly improved and residual oil rate of dry cakes is lower than 1%. Raw material is naturally heated to about 110 after entering the extruder, and then sprayed out through die head (that is to say it is expanded and formed). During the extruding process, temperature of mechanical friction heat can inhibit activity of active teichomycin and can kill some fungi and microorganism, so that material will not deteriorate in a longer period.

Technological flow of oil making of rice bran extruding and extracting:

Rice bran → Cleaning → Extruding and forming by extruder and keeping fresh →Extracting of oil

Water content of expanded and stabilized bran is 7~ 9% and its acid value will rise to about 1mgKOH/g oil averagely after being stored for one month.

Technological flow of oil making of soybean extruding and extracting: 

a. Flaking, extruding and extracting: Soybean → Cleaning → Grinding→ Softening→ Flaking→ Extruding→ Cooling and drying→ Extracting

b. Grinding, extruding and extracting: Soybean→ Cleaning → Grinding (Particle size 3mm) →Extruding → Cooling and drying → Extracting

2. Application in soybean protein factories

Soybean→ Cleaning→ Softening→ Flaking→ 

                                                                                       Low temperature pressing 

→Extruding, soybean smell removal & urease inactivation→                                           →

                                                                                       Low temperature extracting

→Manufacturing different kinds of soybean protein

After extruding of soybean, activity of urease UA<0.4.

3. Technological flow for application in rice mills (for a rice mill over 30t/d)

Raw rice→ Cleaning→Husking→Paddy separation→Rice milling→Broken rice separation→Finished white rice

 Rice bran→Extruding, forming and keeping fresh

To oil plant or feed plant ← Finished stabilized bran ← Packing ← Cooling and drying

4. Application in formula feed mills

Soybean→Cleaning→Grinding→Extruding, soybean smell removal and ripping → Making formula feed or other use

The machine can be used for the above applications, as required by different extruding treatment, under 80140 temperature, it can be adjusted by discharging die heads with different apertures, material can be dehydrated by 35% after being expanded.