Self-stirring tube-type leaching reactor

Abstract

A self-stirring tubular dissolution reactor, including a reactor cylinder, an inlet channel, an outlet channel, a turbine device, a stirring shaft and a frame-type flexible stirrer; the reactor cylinder is composed of a cylinder wall and two end plates; the frame type The flexible agitator is located between the inlet channel and the outlet channel, and consists of a shaft sleeve, a frame-type stirring blade and a flexible scraper; the frame-type stirring blade is fixed on the shaft sleeve, and the outer end of the frame-type stirring blade is fixed with a flexible scraper plate, and the flexible scraper is in contact with the cylinder wall; the shaft sleeve is sleeved on the stirring shaft, and the two ends of the stirring shaft are assembled on the two end plates of the reactor cylinder, and the turbine device is also fixed on the stirring shaft; the inlet channel and the outlet channel It is located on both sides of the cylinder wall, where the turbine device is opposite to the inlet channel. The self-stirring tubular dissolution reactor of the present invention is suitable for multiphase flow systems such as solid-liquid, gas-liquid-solid, etc., relying on the pressure energy of the multiphase flow medium to do work on the machine and drive the stirring shaft to rotate without adding energy It plays a stirring role and saves energy.

Description

technical field [0001] The invention relates to a hydrometallurgical stripping reactor, in particular to a self-stirring tubular stripping reactor. Background technique [0002] Mineral dissolution is the most common and basic unit process in metallurgical and chemical processes. With the rapid development of the national economy, the utilization of low-grade complex ores has become more and more important. In order to improve the effective utilization of valuable metals in low-grade complex ores Dissolution, pressure dissolution, is receiving increasing attention from both industry and academia. The dissolution reactor is the core equipment of the pressurized dissolution process. Due to the harsh conditions of the pressurized dissolution process, such as strong acid and strong alkali environment under high pressure, and involving liquid / solid or gas / liquid / solid multiphase reaction systems, at the same time , Equipment scarring is a common problem in hydrometallurgical rea...

AI Technical Summary

Problems solved by technology

[0003] At present, the existing tubular reactors are mainly divided into two categories. One is the traditional tubular reactors commonly used in metallurgical and petrochemical industries. The demand for chemical reactions is widely used, but in order to ensure the high turbulence of the multiphase flow medium in the reactor, it is usually necessary to provide a large power source and consume a lot of energy.

The second type is the improvement on the basis of traditional tubular reactors. For example, in the "inner loop stacked tube dissolution reactor" proposed by Zhang Ting'an (patent application number 200510047338.3), an inner loop stacked tube with stirring device is proposed. The tubular stirring dissolution reactor is mainly used for the dissolution process of minerals such as bauxite. The reactor is mainly driven by a motor to drive the stirring shaft and the blades on the shaft to rotate to form a turbulent flow of the medium; the disadvantage is: the motor drives the stirring shaft, It consumes a lot of energy, and it is difficult to seal the end of the reactor, especially in the high-pressure dissolution process, which is easy to leak

Tan Dingzhong and others proposed the "unpowered pipeline agitator" (patent application with application number 201110327208.0). This reactor includes a driving section cylinder and a mixing section cylinder. The driving element realizes dynamic mixing; its disadvantage is that the fluid medium enters and exits axially at both ends of the cylinder, which is not conducive to the rotation of the driving impeller and the mixing of multiphase flow media from the perspective of fluid mechanics. At the same time, there are many internal components in the cylinder. When the medium system When the solid phase is contained, it will cause wear and blockage of the components. The agitator is only used for the mixing of liquid media (see the original text of Tan Dingzhong's patent "stirring and mixing more than two liquids"), so it is not suitable for solid-liquid or gas-liquid -Solid system

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