Used destoner

Types of used destoners

Used destoners are machines that are used to separate stones and other foreign materials from grains. They are essential in grain processing to ensure the quality and safety of the final product. There are several types of destoners, each with specific features and working principles. Here are some of them:

• Horizontal Air Flow Stone Separator

  This type of destoner uses horizontal airflow to separate stones from grains. The grains are spread in a thin layer on a vibrating table, and air is blown through the table in a horizontal direction. The stones, being heavier and having a different shape, fall off the table into a separate collection bin.

• Vertical Air Flow Stone Separator

  In this type, the air is blown vertically upward. The grains are also spread on a vibrating screen, but the airflow direction is different. The lighter grains remain on the screen and are collected for further processing, while the heavier stones fall through the screen into a collection bin below.

• Vibrating Table Stone Separator

  This destoner relies mainly on vibration for separation, although air may also be used. The vibrating table causes the grains and stones to move and settle according to their weight and shape. A few screens may be used to help separate the smaller stones.

• Gravity Separator

  Gravity separators use differences in specific gravity to separate materials. They have a deck that is inclined and vibrated. Lighter materials, like grains, rise to the top, while heavier materials, like stones, settle to the bottom.

• Disc Separator

  This destoner has a series of rotating discs with varying spacing. As the discs rotate, they create a series of air pockets that help separate grains from stones based on their size and shape.

• Magnetic Separator

  Some destoners use magnetic fields to attract and remove magnetic stones or metal contaminants from grains. They are often used when there is a need to remove metal particles.

• Hydraulic Separator

  Hydraulic destoners use water as a medium for separation. The stones sink, and the grains float or remain suspended in the water.

• Combined Separator

  These machines use a combination of methods, such as vibration, air flow, and gravity, to achieve more effective separation.

Design of used destoners

Used destoners have been developed in different designs to suit the various requirements of the customers, the various types of stones and the types of grains in which they are found. Some of the designs include;

• Horizontal Grain Stone Remover

  This design is used for barley, wheat, rice and other cereals that are flattened, oval or round in cross-section. It consists of a feed hopper, a horizontal cylindrical separation chamber, an air blower, an exhaust duct and a suction fan with an exhaust duct. The grain is fed into the separation chamber from the feed hopper. The chamber has a rotating drum with sieves of different mesh sizes. The grain moves through the rotating drum while the stones are separated by gravity and the air blower.

• Vertical Stone Remover for Round Grains

  This machine has a vertical cylindrical separation chamber, an air blower, an exhaust duct, a feed hopper, and a stone trap. The grain is fed into the separation chamber from the feed hopper. The chamber contains a rotating drum with vertical rods. The grain moves through the rods as stones are separated by gravity. The air blower removes light particles.

• Vibrating Stone Separator

  This design is used for round grains like millet, sorghum, and small seeds. It has a vibrating screen, a feed hopper, a stone trap, an air blower, and an exhaust duct. The vibrating screen separates stones by size and weight. The vibrating screen is powered by a vibrating motor.

• Combined Destoner

  This machine can separate stones from various grains and seeds. It has a modular design with interchangeable components. It has a vibrating screen, a horizontal separation chamber, and an air blower. The combined destoner can be adjusted for different grains and seeds.

• Optical Stone Detector

  Advanced technology has been developed to use cameras and scanners to identify stones. It has a conveyor belt, an optical scanner, and a separation system. The optical scanner detects stones and the separation system removes stones from the grain.

• Suction Type Stone Remover

  It is used for small seeds and grains like sesame and small spices. It has a feed hopper, a separation chamber, a suction fan, and a stone trap. The suction fan removes stones and heavy impurities.

Wearing/Matching suggestions of used destoners

Used destoners can be matched with different equipment and worn in a way that suits the functionality and productivity of the factory. Here are five suggestions:

• Efficiency and Reliability

  The destoner should be worn in a way that depicts efficiency and reliability. For example, when matched with a grain conveyor system, it should be ensured that the connection points are secure and leak-proof. This will enhance the efficiency of the grain handling system. Additionally, regular maintenance should be conducted on the used destoner to ensure it is functioning properly. This will ensure that there is no contamination of grains due to malfunctioning of the destoner.

• Separation and Purification

  When destoning rice, worn matching suggestions should focus on separation and purification. For example, when working with a used destoner machine, one should wear a clean laboratory coat, gloves, and safety goggles. This will ensure that contamination is kept at the minimum when separating stones from rice. Additionally, it should be ensured that the destoner machine is clean and free from any residues from the previous operations. This will enhance the purification of rice.

• Integration and Adaptability

  When integrating a used destoner into a grain processing line, flexibility in matching and wearing is important. For instance, one should select a destoner that has adjustable discharge and intake ports. This will facilitate easy integration into existing grain handling systems. Additionally, one should prioritize equipment that is compact and modular. This will enhance easy installation and reconfiguration if need arises.

• Maintenance and Care

  When maintaining and caring for a used destoner, wearable matching suggestions should focus on safety and hygiene. For example, one should put on sturdy gloves and an apron when cleaning the destoner. Moreover, safety goggles should be worn when handling cleaning chemicals. Regular maintenance checks should also be conducted on the destoner. This will ensure that there are no wear and tear components that require replacement.

• Operational Training

  Training operatives to effectively use a used destoner can be enhanced by wearing and matching safety gear. For instance, when conducting training, participants should be encouraged to wear steel-toed boots, hard hats, and high visibility vests. This enhances safety in the training environment. Additionally, trainers should demonstrate the operational steps of the destoner. This includes how to adjust settings, start the machine, and troubleshoot common issues.

Q&A

Q1: How does a destoner separate stones from grains?

A1: A destoner separates stones from grains using a vibrating bed and an air jet. The vibrating bed moves the grain and stone items while the air jet creates an upward current. The stones fall faster and move farther than the grains due to their higher weight and size. This process efficiently separates heavy impurities like stones from lighter grains.

Q2: What are the types of destoners?

A2: There are two main types of used destoners. The first is the horizontal vibrating type, where the grain mixture moves across a vibrating screen. The second is the inclined vibrating type, which uses an inclined screen for separation. Both types effectively remove stones and heavy impurities from grains.

Q3: What are the benefits of a grain destoner?

A3: A grain destoner improves product quality by removing stones and heavy impurities from grains. This ensures a cleaner and safer final product. It also increases efficiency by automating the separation process, saving time, and reducing labor costs. Overall, a grain destoner enhances quality and productivity in grain processing.

Q4: Can a destoner work with different types of grains?

A4: Yes, a destoner can work with various grains, including wheat, rice, and maize. It is adjustable to accommodate different grains and their specific properties. The destoner effectively removes stones and heavy impurities from each type of grain, ensuring a clean and safe final product.

Q5: Are destoners easy to maintain?

A5: Yes, destoners are relatively easy to maintain. Regular maintenance tasks include cleaning the vibrating screen and checking the motor and electrical components. These tasks ensure the destoner operates efficiently and maintains product quality. Most maintenance tasks are straightforward and can be performed by in-house staff with minimal training.