Material requirements for horizontal centrifuge propellers

What are the material requirements for the screw propeller of the drilling fluid horizontal centrifuge? Centrifuge is one of the important equipment in the solids control equipment in oil drilling work. Generally, we install it on the last stage of the solids control system to remove fine particles in the mud and ensure safe drilling. Among them, the screw propeller is one of the main components of the drilling fluid centrifuge. Today we will focus on the screw propeller of the centrifuge.

The screw propeller is a main component of the drilling fluid centrifuge. Its structure, materials and parameters are directly related to the separation effect, production capacity and service life of the drilling fluid centrifuge. The only function of the screw is to push the sediment, but its requirements are different in the sedimentation zone and the drying zone. The solid particles in the suspension in the sedimentation zone gradually form a sedimentation zone toward the wall of the drum.

The screw should be beneficial to move the sediment without violently agitating the sediment, resulting in the separation of the separated sediment and the liquid phase. In the drying zone, the spiral not only continues to move the sediment but also creates favorable conditions for the separation of sediment and water.

The screw propeller is generally composed of spiral blades, an inner cylinder, and a feeding chamber.

The spiral blade is a component that directly contacts the sediment to transport the sediment. The common forms are:

A: Connect the integral spiral blade, commonly used and easy to manufacture

B: Continuous ribbon-shaped spiral blade, the blade rigidity is poor, not used much, mainly used for sedimentation and separation.

C: Split spiral blade

D: Spiral blade with additional blades

Spiral is divided into single-head and double-headed. Because double-headed spiral is easy to process and beneficial to balance, most of them are double-headed spiral.

There are two layouts of spiral blades, one is that the spiral blade is perpendicular to the drum bus, which is convenient for welding and correction, and is commonly used in design. One is that the blade is perpendicular to the axis of rotation.

Because the blades of the propeller are in direct contact with the sediment, the blades have high requirements for materials, and the blades need to have high wear resistance. Generally, hard alloys are built-up or spray-welded on the surface of the blades. This processing method is more difficult. At present, a new process for manufacturing wear-resistant blades has appeared, which is characterized by using wear-resistant sheets to be fixed on the tile-shaped workpiece by brazing, welding or bonding, and then welding the two-piece assembly to the spiral blade to make The centrifuge maintains a high production capacity.

Xi’an HL Petroleum Equipment Co., Ltd. specializes in the production of various centrifuges, such as LW355 centrifuge, LW450 centrifuge, LW500 centrifuge, and LW600 centrifuge. We can customize them according to customer needs. Welcome to send inquiry to us: sales@hlsolidscontrol.com.