System and a method for treatment of coal mine drainage water

Abstract

Embodiment of the invention provides a system and a method for the treatment of coal mine drainage water, wherein the system comprises a membrane chemical reactor and a reverse osmosis device; the reverse osmosis device consists of a raw water reverse osmosis unit and a concentrated water reverse osmosis unit; the outlet end of the membrane chemical reactor is connected with the inlet end of the raw water reverse osmosis unit and the concentrated water outlet end of the raw water reverse osmosis unit is connected with the inlet end of the concentrated water reverse osmosis unit; the membrane chemical reactor consists of a coagulation reactor and a microfiltration membrane filter; the outlet end of the coagulation reaction device is connected with the inlet end of the microfiltration membrane filter; the microfiltration membrane filter consists of a water distributing area, a water producing area, a filtration area, a slag storage area and a constant pressure backwashing device. The system and method for treatment of coal mine drainage water provided by the invention embodiment are capable of significantly improving the recovery rate of the coal mine drainage water and reduce the energy consumption of the system.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a treatment system and a treatment method for coal mine drainage water. Background technique [0002] Coal mine drainage water is the water body that gushes out from the coal seam during the coal mining process. Drainage water in coal mines is generally caused by surface infiltration water and water in groundwater layers produced during mine mining, which are polluted by sand and mud particles, dust, dissolved salts, acids, alkalis, coal particles, grease, etc. It can be seen that the pollutants in the dewatering water of coal mines are complex, and if they are discharged directly, they will easily cause environmental pollution. [0003] The existing coal mine drainage water treatment methods usually adopt gravity sedimentation process, such as: flocculation-sedimentation treatment technology, dense medium velocity sinking water treatment technology, magnetic separation ...

AI Technical Summary

Problems solved by technology

[0004] However, when the existing gravity sedimentation process is used to treat the drained water of coal mines, due to the limitation of the purification principle of the gravity sedimentation process itself, when the amount of drained water in coal mines and the content of suspended solids in the water body fluctuate, the quality of the effluent water is vulnerable. impact, resulting in unstable effluent quality

Therefore, the coal mine drainage water treated by the existing gravity sedimentation process can only meet the general needs of spraying, dust reduction or standard discharge, and cannot further reuse the produced water, resulting in a low recycling rate of coal mine drainage water.

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