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Magnetic separation method and apparatus for mine water underground treatment

A magnetic separation and mine water technology, applied in mining wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of long treatment cycle, high treatment cost and high freight cost, and achieve reduction Effects of operating costs, accelerating precipitation, and reducing construction costs

Active Publication Date: 2013-08-07
SCIMEE TECH & SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because this method uses nanofiltration membrane separation technology, the treatment capacity is small, and it can only be used in a few occasions that require high water quality. If a large amount of mine water is treated, the treatment cost is high, the freight cost is high, and the treatment cycle is long. lead to the limitation of its application

Method used

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  • Magnetic separation method and apparatus for mine water underground treatment
  • Magnetic separation method and apparatus for mine water underground treatment
  • Magnetic separation method and apparatus for mine water underground treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Such as figure 1 As shown, the magnetic separation device suitable for the underground treatment of mine water given in this embodiment includes a pretreatment mechanism, a magnetic flocculation mechanism, a magnetic precipitation mechanism, a magnetic separation mechanism and a sludge treatment mechanism connected in sequence.

[0040] Wherein the pretreatment mechanism is a grid 2, installed in the water inlet 1 of the device, to remove large particles such as sand, wood chips and floating objects, and regularly transported away after being collected.

[0041] The magnetic flocculation mechanism is composed of a flocculation tank 3, an agitator 4, a coagulant preparation storage tank 5, a coagulant metering pump 6, a coagulant aid preparation storage tank 7, a coagulant aid metering pump 8 and a magnetic seed quantitative dosing machine 9 . The flocculation tank 1 in this embodiment has three stages, which are separated by three partitions 10. Each stage of the flocc...

Embodiment 2

[0046] First remove the large particles of impurities and floating matter in the mine water that is directly transported from the mine through ditches or pipelines, and then according to the mine water test, if the suspended matter content in the mine water is 100-500mg / L, the COD is 30-60mg / L , according to the volume flow rate of mine water according to 500g / m 3 and 20g / m 3 Add ferric oxide and basic aluminum chloride, and stir for 1.5 minutes at a speed of 220 rpm, wherein the density of ferric oxide is 4.0 g / cm 3 , the particle size is 44μm; then the volume flow rate of mine water is 0.5g / m 3 Add anionic polyacrylamide coagulant, and stir for 1.5 minutes at a rotating speed of 30 rpm, and then stir for 4 minutes at a rotating speed of 10 rpm; stop adding magnetic seeds when the magnetic seeds reach equilibrium. 24 hours according to the volume flow of mine water according to 1-2g / m 3 Replenish once again; after the water treated by magnetic flocculation is transported t...

Embodiment 3

[0049] First remove the large particles of impurities and floating matter in the mine water directly transported through ditches or pipelines, and then according to the test of the mine water, if the suspended matter in the mine water is 500-1000mg / L and the COD is 60-80mg / L, Take the volume flow rate of mine water as 1000g / m 3 and 30g / m 3 Add ferric oxide and basic aluminum chloride, and stir for 2 minutes at a speed of 200 rpm, wherein the density of ferric oxide is 4.5g / cm 3 , the particle size is 150μm; then the volume flow rate of mine water is 1.0 g / m 3 Add cationic polyacrylamide coagulant, and stir for 2 minutes at a speed of 20 rpm, and then stir for 3 minutes at a speed of 20 rpm; stop adding magnetic seeds when the magnetic seeds reach equilibrium. 24 hours according to the volume flow of mine water according to 1-2g / m 3 Replenish once again; after the water treated by magnetic flocculation is transported to the sedimentation tank and relies on the self-weight of...

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Abstract

The invention discloses a magnetic separation method for a mine water underground treatment. The method comprises: removing large particle impurities and floating substances in mine water; adding a magnetic seed and a coagulant; stirring for 1-2 min at a rotation speed of 200-250 rotation / min; adding an auxiliary coagulant; stirring for 1-2 min at a rotation speed of 20-50 rotation / min; stirring for 3-5 min at a rotation speed of 10-20 rotation / min; conveying the water with the magnetic flocculation treatment to a precipitation tank; and carrying out nature precipitation through the floc weight, wherein the upper layer clear water can be subjected to standard discharge or be reused, the precipitated magnetic sludge is dispersed, the magnetic seed is separated to be recycled, and the remaining non-magnetic sludge is dewatered and then is conveyed to the on-well, wherein a water content of the dewatered sludge is less than 60%. The invention further discloses a magnetic separation apparatus for the mine water underground treatment, wherein the apparatus is designed according to the method. According to the present invention, the method and the apparatus are matched appropriately, an integration degree is high, an occupation area is small, energy consumption is low, operation cost is low, a treatment effect is good, and the method and the apparatus are especially suitable for construction under the mine.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment recycling methods and devices, and in particular relates to a magnetic separation method and device suitable for underground treatment of mine water. Background technique [0002] Mine water refers to the water that flows into the mine from various sources during the mining process. This kind of water has undergone a series of physical, chemical and biochemical reactions in the groundwater in contact with coal seams and rock formations, coupled with the impact of human activities. Therefore, the water quality of this water has obvious characteristics of the coal industry: high concentration of suspended matter, small particles difficult to Precipitation, and contains waste engine oil, emulsified oil and other organic pollutants. Therefore, the discharge of mine water not only pollutes the environment, but also causes a lot of waste of limited water resources and coal powder. Improving th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12C02F103/10
Inventor 倪明亮黄光华
Owner SCIMEE TECH & SCI CO LTD
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