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.
U-shaped trough Twin Screw Conveyor
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. Tubular Twin Screw Conveyor (or Round Tube Twin Screw Conveyor)
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

Specification		Main technical performance	Drive device	Drive device			Weight(kg)
Diameter	Length(m)	Yield( t/h)	Rotating speed(min)	Reducer		Electric motor
				Model	Speed ratio	Power(kw)
U 200	-10	9	60	ZQ250	23.34	1.1	726
U 200	-20	9	60	ZQ250	23.34	1.5	1258
U 250	-10	15.6	60	ZQ250	23.34	2.2	960
U 250	-20	15.6	60	ZQ250	23.34	3	1750
U 300	-10	21.2	60	ZQ350	23.34	3	1373
U 300	-20	21.2	60	ZQ350	23.34	4	2346
U 400	-10	51	60	ZQ400	23.34	5.5	1911
U 400	-20	51	60	ZQ500	23.34	11	2049
U 500	-10	87.5	60	ZQ400	23.34	7.5	2381
U 500	-20	87.5	60	ZQ650	23.34	18.5	5389
U 600	-10	134.2	45	ZQ750	23.34	22	3880
U 600	-10	134.2	45	ZQ850	23.34	55	7090

What are the advantages and features of Twin Screw Conveyor?

Due to its double-screw structure, Twin Screw Conveyor has advantages that are difficult to match with single screw conveyors.
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 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.