Main process of oilseed cleaning
The main process of oilseed cleaning include Screening separation,aspiration,magnetic separation,washing,removeal of mud balls,same-size with oilseeds,ect.
② Aspiration
Aspiration is a method of removing impurities by using the difference in suspension velocity between oil and impurities.
The main purpose of aspiration is to remove light impurities and dust, but also to remove some of the heavier impurities such as stones and soil. This method is often used to clean up oils such as cottonseed and sunflower seeds. The aspiration can be divided into two types: pressure type and suction type.
③Magnetic separation
Magnetic separation is a method of using magnetic force to remove magnetic metal impurities in oilseed. There are two types of magnetic separation devices commonly used in oil plants: rotary magnet separator and pipe magnetic separator.
④Washing
Washing is to use water and oilseed to directly contact to wash off the mud attached to the surface of the oilseed, and according to the principle of different sedimentation speeds of raw materials with different specific gravity in the water, at the same time, the heavy impurities such as stones, sand and metals in the oil are removed.The mud balls, same-size with oilseeds can be loosened into fine particles under the infiltration of water and washed away by water. The use of water washing can also effectively prevent dust from flying.
⑤ Removal of mud balls, same-size with oilseeds
The soil aggregates whose shape and size are equal to or similar to those of oil seeds, and whose specific gravity is not significantly different from that of oil seeds, are called "mud balls, same-size with oilseeds".Especially in rapeseed and soybeans, the content of mud balls, same-size with oilseeds is relatively large, and it cannot be effectively removed by separation and aspiration equipment. A special method and equipment must be used. The main equipment for removing of mud balls, same-size with oilseeds is Iron roller rice milling machine, rubber roller rice hulling machine, disc huller, horizontal hull beater and vertical hull beater, etc.
⑥Cleaning of cottonseed
A certain amount of impurities will be mixed into the cottonseed after delinting in the cotton processing plant during loading, unloading and transportation. These impurities include inorganic impurities and organic impurities. In order to increase the oil yield, improve the quality of oil and cake, and increase the equipment Processing capacity, reduce equipment wear, improve workshop production environment, avoid accidents, impurities must be removed as much as possible.
① Screening separation
Screening separation is a method that uses the difference in particle size (width, thickness, length) between oilseed and impurities and separates impurities with the help of sieve holes.Commonly used screening separation equipment includes fixed sieve, vibrating sieve and rotating sieve. Their main working part is the sieve surface, and the sieve holes should be selected reasonably according to the shape and size of the oilseed and impurity particles.
② Aspiration
Aspiration is a method of removing impurities by using the difference in suspension velocity between oil and impurities.
The main purpose of aspiration is to remove light impurities and dust, but also to remove some of the heavier impurities such as stones and soil. This method is often used to clean up oils such as cottonseed and sunflower seeds. The aspiration can be divided into two types: pressure type and suction type.
③Magnetic separation
Magnetic separation is a method of using magnetic force to remove magnetic metal impurities in oilseed. There are two types of magnetic separation devices commonly used in oil plants: rotary magnet separator and pipe magnetic separator.
④Washing
Washing is to use water and oilseed to directly contact to wash off the mud attached to the surface of the oilseed, and according to the principle of different sedimentation speeds of raw materials with different specific gravity in the water, at the same time, the heavy impurities such as stones, sand and metals in the oil are removed.The mud balls, same-size with oilseeds can be loosened into fine particles under the infiltration of water and washed away by water. The use of water washing can also effectively prevent dust from flying.
⑤ Removal of mud balls, same-size with oilseeds
The soil aggregates whose shape and size are equal to or similar to those of oil seeds, and whose specific gravity is not significantly different from that of oil seeds, are called "mud balls, same-size with oilseeds".Especially in rapeseed and soybeans, the content of mud balls, same-size with oilseeds is relatively large, and it cannot be effectively removed by separation and aspiration equipment. A special method and equipment must be used. The main equipment for removing of mud balls, same-size with oilseeds is Iron roller rice milling machine, rubber roller rice hulling machine, disc huller, horizontal hull beater and vertical hull beater, etc.
⑥Cleaning of cottonseed
A certain amount of impurities will be mixed into the cottonseed after delinting in the cotton processing plant during loading, unloading and transportation. These impurities include inorganic impurities and organic impurities. In order to increase the oil yield, improve the quality of oil and cake, and increase the equipment Processing capacity, reduce equipment wear, improve workshop production environment, avoid accidents, impurities must be removed as much as possible.