Efficient centrifugal reactor

Abstract

The invention belongs to the field of applications of metallurgical acid sewage heavy metal ion treatment technologies, and relates to an efficient centrifugal reactor, which comprises a shell (1), arotating barrel (3), a baffle (9), a motor (7), a mesh-like mixer (10) and the like, wherein the center of the shell is provided with the motor-driven rotating barrel, the bottom portion of the rotating barrel is provided with a liquid inlet hole (2), and the upper portion is provided with a plurality of liquid outlet holes. According to the present invention, the motor drives the rotating barrelto operate at a high speed, such that the acidic sewage containing heavy metal ions (such as copper, arsenic and the like) and the sodium sulfide solution are highly mixed so as to strengthen the conversion reaction and saving the sodium sulfide solution.

Description

technical field [0001] The invention relates to a high-efficiency centrifugal reactor, which is suitable for the treatment technology of acid sewage heavy metal ions in the metallurgical industry, and in particular relates to the treatment technology of smelting flue gas acid waste water in the nonferrous metal smelting industry. Background technique [0002] The waste acid discharged from the non-ferrous smelting acid system generally has an acidity of 4-11%, a copper content of 500-6000 mg / l, and an arsenic content of 500-4000 mg / l. Domestic smelting enterprises generally adopt the following methods for removing copper and arsenic from waste acid: The waste acid and sodium sulfide are added to the vulcanization reaction tank at the same time for reaction, and a relatively safe gas phase pressure is maintained, so that hydrogen sulfide redissolves into the liquid phase to react with copper and arsenic plasma, and the hydrogen sulfide gas that escapes incompletely reacts with...

AI Technical Summary

Problems solved by technology

[0003] 1. The excess rate of sodium sulfide is relatively large, causing a large amount of unreacted sodium sulfide to enter the subsequent treatment process, which requires costly reprocessing of sulfide

[0004] 2. Leakage of hydrogen sulfide gas, there are risk factors such as poisoning and explosion

The traditional vulcanization reaction mechanism makes it difficult to form a unified acid water vulcanization process between ensuring safety and ensuring the efficiency of copper and arsenic removal

In order to obtain high copper and arsenic removal efficiency, it is necessary to retain excess hydrogen sulfide gas, which has safety risks such as poisoning and explosion.

[0005] 3. There is a risk of gypsum slag and neutralized slag being defined as hazardous waste

If the safety of the vulcanization reaction is guaranteed, it is necessary to reduce the dosage of sodium sulfide, which will reduce the efficiency of copper and arsenic removal, resulting in the production of gypsum slag in the neutralization process at the back end of the reaction. The toxicity and leaching index of the neutralization slag will exceed the standard, and will be defined as hazardous solid waste will be managed in accordance with the special regulations on hazardous waste management, which may make enterprises bear huge solid waste treatment costs

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