Treatment system for converting mine waste-rock dredging drainage water into production water

Abstract

The invention discloses a treatment system for converting mine waste-rock dredging drainage water into production water. The system comprises a sludge treatment system, as well as a primary water tank with a primary water pump, a pipeline mixer, a star-shaped flocculation tank, a cantboard sedimentation tank, a filtering tank and a clear water tank which are sequentially communicated by virtue of pipelines; the pipeline mixer is communicated with a coagulant aid water tank by virtue of a flocculating agent medicine adding pump, an coagulant aid medicine adding pump and a flocculating agent water tank; the filtering tank is communicated with a pipeline with a Roots blower; a clear water tank is communicated with a backwashing water pump of a filter and is connected with an auxiliary machine circulating water treatment system and a boiler feedwater treatment system in a water-consuming system through delivery pipes; the filter tank is communicated with the primary water tank by virtue of the backwashing drainage pipeline of the filter. By virtue of multi-layered sewage purification, the mine waste-rock dredging drainage water can be effectively subjected to solid-liquid separation treatment, a large quantity of coal dust particles in the water body can be removed, and backwashing drainage water of the filter returns to the primary water tank to be recycled so as not to result in waste of resources, thus saving energy resources.

Description

technical field [0001] The invention relates to a treatment system for transforming gangue dredging drainage into production water. Background technique [0002] Every 1 ton of coal produced in China discharges about 2.5 tons of mine water on average, and the annual discharge of coal mines in the country is about 7 billion to 9 billion cubic meters. In 2009, my country's raw coal production reached 305,000 tons, and the mine water discharge was about 9.15 billion cubic meters. If the waste water is discharged outside without treatment, it will not only waste precious water resources, but also cause serious pollution to the mining area and its surrounding areas. At present, the utilization rate of mine gangue drainage is not high. The main reason is that it is affected by coal mining, which leads to high salinity, high content of suspended solids and large fluctuations (mainly coal dust particles). The composition of mine dredging drainage water is complex, the salt content ...

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Problems solved by technology

[0004] At present, natural settlement or simple coagulation-sedimentation treatment is used to deal with mine gangue drainage. The natural settlement treatment efficiency is low, and the traditional simple coagulation-sedimentation treatment fails to achieve the expected effect. After simple coagulation treatment The water utilization rate of the system is not high, and the general choice is to discharge it on the spot, which causes a great waste of water resources

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