Design and treatment process of drilling mud decanter centrifuges
Drilling mud decanter centrifuges are widely used in oil drilling, sludge separation, and crude oil recovery, mainly because of its simple structure, convenient construction, and excellent dewatering effect, which can fully meet the requirements of engineering construction. The equipment consists of a drum, a spiral, a differential system, a liquid level baffle, a drive system and a control system. During the separation process, the drilling mud and the flocculant liquid are sent into the drum and rotate together with the drum. The muddy water is separated by the action of the drilling mud centrifuge.
After the treatment of the drilling mud decanter centrifuges, the solid particles with larger specific gravity are settled to the inner wall of the drum to form a sludge layer, and then the relative speed difference between the spiral and the rotating drum is used to push the sludge to the drum end to discharge the slag discharge port. The liquid is discharged from the big end of the drum to achieve sludge dewatering.
When designing a drilling mud centrifuge, its drum wall opening rate should be determined according to the rotating speed of the drum and the nature of the treated material. Since the filtrate flows out from the opening, it has a high flow rate under the action of centrifugal force, so when the filtrate flows through the opening, only a small flow area is required to meet the requirements of the filtrate discharge.
The size of the opening aperture of the drum wall of the drilling mud decanter centrifuges should be based on the principle of small aperture. Because when the opening ratio is determined, the number of holes with small pores is large, so that the spacing between the holes and the holes is small, which is favorable for timely discharge of the filtrate. In addition, the small aperture reduces the weakening of the drum wall strength.