Twin Screw Conveyor

What is a Twin Screw Conveyor?

Twin Screw Conveyor  is an industrial equipment for conveying materials, which is equipped with two parallel spiral blades. This design enables it to handle some material characteristics or conveying requirements that are difficult for single screw conveyors to handle. The main function of this equipment is to move materials continuously from one point to another to support material transfer in the production process. In terms of structure, common types of Twin Screw Conveyors include U-shaped trough type and tube type. These types of selection usually depend on the physical properties of the conveyed materials and the specific requirements for dust control or material cleanliness.

What are the types of Twin Screw Conveyors?

Twin Screw Conveyors can be divided into multiple types based on factors such as their structural form, the configuration of the spiral shaft, the characteristics of the spiral blades, and specific application requirements. These different designs are designed to better adapt to various material characteristics and conveying conditions.

Features: The trough is U-shaped, and there is usually an openable cover on the top. The two spiral shafts are installed side by side at the bottom of the U-shaped trough.

Advantages: Convenient for observing material status, cleaning and maintenance. Relatively easy to manufacture.

Applicable scenarios: Suitable for horizontal or small angle (usually less than 20°) conveying, materials with relatively less stringent sealing requirements, or materials that need frequent cleaning, such as sludge, filter cake, grain, feed, certain powders, etc.

Features: Two screw shafts are installed in a completely closed circular or nearly circular pipe.

Advantages: Strong sealing, can effectively prevent dust leakage, and avoid moisture or contamination of materials. Compact structure, small footprint.

Applicable scenarios: Materials with high environmental requirements and need to be completely sealed for conveying, such as fine powders. Horizontal and inclined conveying can be achieved, and even a certain degree of vertical conveying can be achieved under special design.

Basic parameters of Twin Screw Conveyor

What are the advantages and features of Twin Screw Conveyor?

With its unique structure and working principle, Twin Screw Conveyor has shown significant advantages in various material conveying scenarios, becoming an ideal choice for many industries to improve efficiency and solve conveying problems. Its advantages are mainly reflected in the following aspects:

Large conveying capacity: Under the same trough cross-sectional size, Twin Screw Conveyor has two screws working at the same time, and its conveying capacity is usually 1.5 to 2 times that of a single screw conveyor, or even higher.

Handling sticky and easily arched materials: When the two screws rotate in opposite directions, they form a self-cleaning area at the bottom of the trough. The interaction between the spiral blades can effectively break up material agglomerations, prevent adhesion and bridging (arching). This makes it very suitable for conveying materials with strong viscosity, high humidity, and poor fluidity.

Self-cleaning ability: The spiral blades can scrape each other during rotation to clean the adhered materials on the blades, reduce material residues, and reduce the risk of blockage.

Mixing and stirring action: The synergistic action of the two screws can mix, stir or disperse the materials to a certain extent while conveying, which is suitable for processes that require mixing while conveying.

Wide range of conveying materials: In addition to sticky materials, it can also convey general powder, granular and block materials.

What are the applications of Twin Screw Conveyor?

Twin Screw Conveyor is used in a variety of industrial production, and its core function is to convey materials. It uses the synergy of two screws to handle materials that are difficult to effectively handle with conventional single screw conveyors.

Handling sticky or easy-to-arch materials: Twin Screw Conveyor is good at handling materials that are easy to adhere, agglomerate or form "bridges" in the silo. The relative rotation of its two screws, especially the reverse meshing design, can effectively break up the clumps of materials and clean up the adhesion on the spiral blades to ensure smooth movement of materials and avoid blockage.

Large conveying volume requirements: When a higher material conveying capacity is required in a limited space, Twin Screw Conveyor is a common choice. Compared with the single screw design, it can provide a larger effective conveying cross-sectional area with similar external dimensions, thereby increasing the material conveying volume per hour.

Material mixing and stirring: While conveying materials, the movement of the twin screws can also mix, stir or disperse the materials to a certain extent. This is very useful for some process links that require homogenization while conveying, such as the initial mixing of different components.

Twin Screw Conveyor Manufacturers

Manufacturers can produce a variety of Twin Screw Conveyors to meet the requirements of conveying equipment for different industries and material characteristics. Whether it is a U-shaped Twin Screw Conveyor, which is suitable for horizontal or small-angle inclined conveying of powdered, granular and small block materials; or a tubular Twin Screw Conveyor, its fully enclosed design can effectively prevent dust leakage. We can provide high-quality products to ensure the stability and continuity of materials during the conveying process. When selecting a Twin Screw Conveyor, the manufacturer will fully consider the physical properties of the material (such as bulk density, particle size, humidity, abrasiveness, adhesion, etc.), the required conveying volume, conveying length and height, as well as on-site installation space restrictions and working environment (such as corrosiveness, temperature, etc.). Through in-depth analysis of these key parameters, we can provide matching equipment models, materials and drive configurations. In addition, the manufacturer also has customization capabilities. Whether it is the size of the equipment, the form of transportation, the design of the inlet and outlet, special sealing requirements (such as air tightness, pressure resistance) or special needs for cleaning convenience, we can carry out in-depth design and production and provide customized products.

What is the price of Twin Screw Conveyor?

The price of Twin Screw Conveyor is affected by the type of equipment and many factors. Twin Screw Conveyor is not a single product, and its types are diverse to meet different material characteristics and working conditions. Common classifications include U-type Twin Screw Conveyor and tubular Twin Screw Conveyor. U-type Twin Screw Conveyor is suitable for conveying powdered, granular and block materials. It has a simple structure, is easy to clean, and has a relatively low price. Tubular Twin Screw Conveyor adopts a closed design to effectively avoid material contamination and dust leakage. The price will be slightly higher than the U-type. In addition to the type of equipment, factors such as material selection, equipment processing capacity, conveying length and angle will also affect the final quotation of the equipment. For example, the material can be carbon steel, stainless steel, and wear-resistant alloy. The main material of the conveyor can be carbon steel, or wear-resistant materials can be selected according to the wearability of the material. The higher the material grade, the higher the cost. The larger the processing capacity of the equipment, the larger the diameter, the longer the length, and the more powerful the motor, which will increase the manufacturing cost. The longer the conveying length, the more materials and supporting structures are required; the larger the inclination angle, the higher the design requirements for the drive system and spiral blades, which drives up the price.

Twin Screw Conveyor Cases

Twin Screw Conveyor is widely used in many industries due to its stability and adaptability. Here are some typical application cases:

Cement and building materials industry

In the production process of building materials such as cement, lime, mineral powder, sand and gravel, the material conveying volume is large and the abrasiveness is high. Twin Screw Conveyor plays a key role here. For example, it can be used for:

Conveying cement clinker: conveying from the clinker silo to the mill, or from the mill to the packaging machine to ensure continuous and stable production.

Conveying mineral powder and coal powder: During the preparation process, the material flow is precisely controlled to avoid dust pollution.

Conveying sand and gravel aggregates: conveying sand and gravel of different particle sizes from the silo to the mixing station to achieve automatic proportioning.

Chemical industry

The chemical industry has various requirements for material conveying, including powdery and granular materials, as well as corrosive or flammable and explosive materials. Twin Screw Conveyor can be used for:

Transport of various chemical powders: such as polyethylene, polypropylene particles, calcium carbonate, talcum powder, etc., from storage tanks to reactors or packaging.

Precise dosing of auxiliaries and additives: During the mixing or reaction process, a small but critical amount of material is accurately measured and transported through the Twin Screw Conveyor.

Transport of hazardous materials: For toxic, flammable and explosive materials, a fully enclosed tubular Twin Screw Conveyor is used, and special seals and explosion-proof motors are used to ensure safe operation and avoid leakage.

Twin Screw Conveyor provides a conveying solution for handling various types of materials. Its structural feature is the presence of two screws, which enables the equipment to cope with some material characteristics that are difficult to handle with single screw conveyors, such as material adhesion or agglomeration. The actual operating performance of the equipment depends on the physical properties of the conveyed materials and the specific configuration of the equipment itself, including the form and rotation of the spiral blades. As a mechanical device, Twin Screw Conveyor plays a role in maintaining the smooth process during material transfer and is an integral part of the material management link in many production lines.