Method for mixing solid powder and liquid and axial flow type mixer therefor

Abstract

A process for mixing solid powder and liquid and axial flow mixer therefore are disclosed. The axial flow mixer comprises a solid powder proportioning valve, a liquid proportioning valve, and a mixing head connected together in turn, wherein there are inner chambers in above three parts, and these inner chambers form an vertically-interconnected and hermetic chamber, the solid powder proportioning valve is used for adding the solid powder and adjusting the inlet size; the inner chamber of the liquid proportioning valve is used as a channel for solid powder, and there is another channel to the mixing head from the outside used for adding liquid, and the channel opening size can be adjusted; the mixing head is used for mixing the solid powder and liquid. The process comprises adjusting the valve opening of the solid powder proportioning valve and the liquid proportioning valve, and adding the mixed liquid and solid powder into mixer according to given proportion; mixing firstly in mixing head; spraying the mixed slurry into slurry mixing tank, at the same time, continuously monitoring the density of cement slurry by control system. In the invention, multivariable control can be realized and the solid powder and liquid can be mixed in low energy consumption.

Description

technical field [0001] The invention relates to a method for mixing solid powder and liquid and a mixer used therefor. Background technique [0002] The essential equipment in well completion is the cementing slurry preparation equipment, and the most important execution equipment is the mixer. With the development of cementing technology, various mud mixing vehicles or mud mixing skids have appeared one after another. At present, the mixers commonly used in field cementing equipment are all high-energy injectors. The disadvantage of this type of mixer is single variable control, that is, only the amount of mixed water can be controlled, and the amount of dry ash cannot be controlled. The pulp speed is small and the energy required is high. [0003] This problem also exists in various other industrial production processes that require the mixing of solid powder and liquid. Contents of the invention [0004] The technical problem to be solved by the present invention is ...

AI Technical Summary

Problems solved by technology

At present, the mixers commonly used in field cementing equipment are all high-energy injectors. The disadvantage of this type of mixer is single variable control, that is, only the amount of mixed water can be controlled, and the amount of dry ash cannot be controlled. Low pulp speed and high energy requirement

Images