Coal mine underground full-membrane-method modular mine wastewater treatment method and device

Abstract

The invention relates to a coal mine underground full-membrane-method modular mine wastewater treatment method and device, specifically to a coal mine underground full-membrane-method modular mine wastewater treatment method and a coal mine underground full-membrane-method modular mine wastewater treatment device for the water purification method. The device comprises a first water lifting pump, arotational flow solid-liquid separator, a first water production tank, a second water lifting pump, a rotational flow mixer, a rotational flow clarifier, a second water production tank, an ultrafiltration circulating pump, an ultrafiltration separation device, a third water production tank, a nanofiltration water inlet pump, a nanofiltration membrane device, a fourth water production box, a reverse osmosis water inlet pump, a reverse osmosis separation device and a final water production box which are sequentially connected. According to the invention, the whole device is simple in structure,accurate control is carried out on the whole device according to environmental factors, arrangement in a mine is facilitated, purified water meets the requirement for underground water, and the problem that a large amount of energy is consumed due to the fact that a traditional ground water purification device needs to lift underground wastewater to the ground for treatment is solved.

Description

technical field [0001] The field of the invention is the field of wastewater purification, in particular to a method and a device for the treatment of coal mine wastewater by a full-membrane method modularized underground. Background technique [0002] my country is the country with the largest coal output and the largest number of mines in the world, and the discharge of mine water also ranks first in the world. At present, the conventional mine water treatment process in my country is "coagulation-sedimentation-filtration-disinfection": the reaction tank is mainly perforated cyclone or baffle reaction tank, the sedimentation tank is mainly inclined pipe, and the filter tank is generally a valveless filter The pool is disinfected with sodium hypochlorite or chlorine dioxide. These structures are generally larger and are only suitable for surface treatment of mine water. In the treatment process of this conventional process, the amount of coagulant is large, the reaction ti...

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Problems solved by technology

[0004] 1. Generally, the depth of mines is about 600-1000 meters, and the energy consumption required to raise a large amount of underground wastewater is huge. For example, to raise 150m³ / h water to 600 meters, a water pump of about 350kW is required

The waste water contains a large amount of suspended solids and cinders and other impurities, which will also cause frequent system failures.

The comprehensive calculation of the cost of raising the well is very huge, and it is prone to failure, which affects production

[0005] 2. The device is not precisely controlled according to the environmental parameters to eliminate the influence of environmental factors

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