Magnetic coagulation mine water underground purification technology

Abstract

The invention discloses a magnetic coagulation mine water underground purification technology, relates to a method for carrying out a multistage treatment and purification on sewage generated in the mining industry, and aims to provides a purification technology having the advantages of capability of being carrying out in underground, short purification and separation time, little occupied space, little usage amount, low operation cost, and good purification effect. The technology comprises the following steps: converging the mine water to the front end of an underground central water chamber, filtering to remove the slag, introducing the water into a pre-precipitation tank, wherein in the pre-precipitation tank the sludge is periodically discharged into a sludge tank by a submerged sludge pump; introducing the water, which has been processed in the pre-precipitation tank, into a magnetic coagulation system, adding magnetic powder and a coagulating agent into the water, wherein in this process the suspended matters are transformed into micro floccules taking magnetic powder as the carriers; introducing the water into a magnetic separator after the coagulation, introducing the clean water into an underground water tank after the solid-liquid separation; transferring the coal sludge in the magnetic separator to a magnetic separating magnetic drum so as to absorb and recycle the magnetic powder, then discharging the coal sludge from which magnetic powder has been recycled into a sludge tank, and finally dehydrating the sludge in the sludge tank by a press filter so as to obtain dry sludge cakes.

Description

technical field [0001] The invention relates to a method for multi-stage treatment and purification of sewage produced in the mining industry, in particular to a process method for purifying sewage by using a magnetic field. Background technique [0002] my country's coal production ranks first in the world, and the production and discharge of coal mine water also ranks first in the country's industrial wastewater. According to statistics and calculations, the current production of coal mine water in the country reaches 4.5-5 billion m3 per year. 3 . In the past, the main purpose of mine water treatment in coal mines was to meet the environmental protection requirements of discharge standards. With the increasing shortage of water resources in coal mining areas and the rapid development of the coal circular economy industry with large water consumption, the resource value of mine water has been paid more and more attention, especially In water-scarce mining areas, mine wat...

AI Technical Summary

Problems solved by technology

However, there are several disadvantages in actual operation

[0005] 1) Large footprint;

[0006] 2) Equipment maintenance costs are high;

[0007] 3) Underground excavation is labor-intensive and prone to work-related accidents;

[0008] 4) It is greatly affected by the environment and climate, which seriously affects the treatment effect;

[0009] 5) Great impact on the ground environment

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