Process and system for advanced treatment of mine water

Abstract

The invention provides a process for the advanced treatment of mine water, which comprises the following steps of: carrying out primary precipitation on the mine water; carrying out coagulation on the mine water which is subjected to the primary precipitation; clarifying the mine water which is subjected to the coagulation; filtering the clarified mine water; adding acid into the filtered mine water; aerating the acidified mine water; carrying out electric adsorption desalination on the aerated mine water; and disinfecting the desalinated mine water. The invention further provides a system for the advanced treatment of the mine water, and the system comprises a primary precipitation tank, a clarification tank, a first filtering device, an aeration tank, an acid tank, an electric adsorption module and a disinfector, wherein an inlet of the clarification tank is communicated with outlet water of the primary precipitation tank, an automatic coagulant adding system is arranged at the inlet of the clarification tank, an inlet of the first filtering device is communicated with the clarification tank, an inlet of the aeration tank is communicated with an outlet of the first filtering device, an outlet of the acid tank is communicated with the aeration tank, acid can be added into the aeration tank through the acid tank, an inlet of the electric adsorption module is communicated with an outlet of the aeration tank, and the disinfector is communicated with a purified water outlet of the electric adsorption module. According to the process and the system for the advanced treatment of the mine water, the salinity of the mine water is effectively lowered.

Description

technical field [0001] The invention belongs to the technical field of mine water treatment, and in particular relates to a mine water advanced treatment process and system. Background technique [0002] Coal is an important basic energy and raw material in my country, and has an important strategic position in the national economy. In my country's primary energy structure, coal accounts for a large percentage and has made great contributions to my country's national economy and social development. However, in the process of coal mining, a large amount of mine water will inevitably be discharged. On the one hand, because the mine water contains a large amount of suspended solids, salt and other substances, random discharge will lead to the destruction of the ecological environment; on the other hand, the random discharge of mine water Emissions also waste water resources, and water shortages restrict mine production. Therefore, it is imperative to treat mine water. [0003...

AI Technical Summary

Problems solved by technology

[0006] However, the mine water treated with "coagulation-clarification-filtering" has a high degree of salinity, and the mine water cannot meet the requirements of reclaimed water of different water quality for various uses, and the calcium ions (Ca 2+ ) and bicarbonate ion (HCO 3 - ) is too high, it will cause fouling of the electro-adsorption module, thereby increasing the number of backwashing of the electro-adsorption module, and ultimately leading to an increase in the cost of advanced mine water treatment

Images