Continuous mine acid wastewater treatment system and treatment method

Abstract

The invention discloses a continuous mine acid wastewater treatment system and a continuous mine acid wastewater treatment method. The continuous mine acid wastewater treatment system comprises two groups of treatment tanks, buffer tanks and drainage channels, wherein two groups of the treatment tanks are the same and are connected in parallel; the buffer tanks are connected at the outlets of the treatment tanks by pipelines; the drainage channels are arranged at the outlets of the buffer tanks; the treatment tanks comprise a first-level primary deposition tank, a second-level primary deposition tank, a first-level filter tank, a second-level filter tank, a third-level filter tank and a secondary deposition tank, wherein the first-level primary deposition tank, the second-level primary deposition tank, the first-level filter tank, the second-level filter tank and the third-level filter tank are connected in sequence and gradually reduced in height; and a medicine adding device is arranged on each of the first-level filter tank, the second-level filter tank and the third-level filter tank. According to the continuous mine acid wastewater treatment system and the continuous mine acid wastewater treatment method disclosed by the invention, the mine acid wastewater is gradually treated by adopting an overflowing way, so that liquid supernatant can be timely overflowed while the deposition is ensured during the whole treatment process, and therefore, the treatment time is shortened and the efficiency is improved. Moreover, the gradual overflowing treatment way is adopted, so that the energy consumption and the investment cost are low and the treatment process is easy to control. Moreover, the wastewater is neutralized by calcium carbonate without secondary pollution.

Description

technical field [0001] The invention relates to a continuous mine acid wastewater treatment system and a treatment method, belonging to the technical field of mine wastewater treatment. Background technique [0002] Southwest China contains a large amount of metal ore and coal resources, and most of the metal mines and coal mines contain a large amount of metal sulfides. During the mining process of mineral resources, under the action of microorganisms and oxygen, through S 2- → SO 4 2- After the process, sulfate compounds are formed and dissolved in water, which increases the concentration of heavy metal ions in the water, resulting in a decrease in the pH value of the water and making the water body acidic. [0003] At present, there are mainly the following methods for the treatment of mine acid wastewater at home and abroad, but there are different problems: [0004] Adsorption method: Activated carbon has limited adsorption capacity for pollutants, and waste of satu...

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Problems solved by technology

[0010] The purpose of the present invention is to provide a continuous mine acid wastewater treatment system and treatment method to solve the problems of high investment cost, large amount of waste residue, complicated operation, long treatment period and easy secondary pollution in the traditional mine wastewater treatment method. pollution problem

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