Pressure reduction and discharge device of pressure reactor

Abstract

A pressure reduction and discharge device of a pressure reactor comprises a discharge pipe (3) and a throttling orifice (2) installed on the discharge pipe (3), wherein the discharge pipe (3) extends out of a flash tank from the inside of the flash tank. The throttling orifice (2) is connected with the discharge pipe (3) through a discharge pipe flange (4). Abrasion-resistant taper sleeves (5) are arranged at the positions, in front of and behind the throttling orifice (2), in the discharge pipe (3) respectively. The throttling orifice (2) is a round board with a round hole in the center. Due to the fact that the discharge pipe (3) is provided with the throttling orifice (2), pressure drops generated in front of and behind a discharge valve can be reduced, and it is ensured that the pressure drops and the flow rate of ore pulp at all sections in the discharge pipe are not high; and thus, abrasion to the discharge pipe and the discharge valve from the ore pulp is relieved, and normal operation of production is guaranteed.

Description

Technical field [0001] The invention relates to a pressure vessel decompression discharge device used in a hydrometallurgical leaching process, belonging to the technical field of metal smelting. Background technique [0002] Pressure leaching technology is an advanced hydrometallurgical process developed in the 20th century. The use of this technology to process nickel-containing materials has been successfully industrialized and applied at home and abroad, and has achieved significant economic and social benefits. At present, in the pressure leaching metallurgical process, the pressure kettle is the key equipment of the pressure leaching process, and its normal operation is related to the smooth progress of the entire production process. However, in the actual production process, the failure of the discharge valve and discharge pipe of the pressurization kettle is quite frequent, which severely restricts the further improvement of the pressurization kettle's operating rate and ...

AI Technical Summary

Problems solved by technology

Once the discharge valve is damaged, the liquid level control will fail. On the one hand, the high liquid level will cause the slurry to flood the kettle, and the slurry will rush directly to the roof from the exhaust pipe with the airflow, and even block the steam-water separator, making the backflow unblocked; On the other hand, the liquid level is low. Due to the high temperature in the kettle and the continuous introduction of oxygen, the anti-corrosion layer in the kettle will oxidize and fall off, thereby blocking the discharge pipe; The autoclave must be cooled and depressurized and shut down for processing, which seriously affects the efficient and safe operation of the autoclave and reduces the operating rate

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