New Technology Of Mine Water Resource Utilization And Development Of New Membrane Material

For a long time, coal mining has been at the expense of the environment in China. With the continuous increase of coal production in China, the environmental problems caused by coal mining become more and more prominent, among which the damage of water resources is the most obvious and most sensitive, because most of the mining areas are located in arid and semi-arid areas in central and western China. In addition,the traditional mining theory emphasizes the disaster of mine water, while ignoring the water resources, and water as the root causes of disasters to be dealt with, "dry", "drainage" and other mine water control methods not only cause a lot of water resources waste, and harmful groundwater can lead to secondary pollution. Therefore, the re-use of mineral water resources become imminent.This paper introduces the current method of mine water recycling.First, the mine water pumped to the ground, the ground water treatment station by flocculation sedimentation, sand carbon filter and ultrafiltration and reverse osmosis purification process and then return to the underground for use. The new process, new method and new material of mine water resource utilization are explored because of its shortcomings, such as long and complicated pipeline, high energy consumption, high dosage, high running cost, poor explosion proof and large space occupied by the ground.The coal industry, energy-saving emission reduction and sustainable development of the new target.In this paper, a tubular membrane (TMF) pretreatment process, using the membrane distillation (MD) process for deep purification process. And the process equipment used compressed air as power, without explosion-proof, modular, according to the site of origin and water quality requirements, removable zero to face separate treatment, can also be assembled to the bottom of the water silo for comprehensive management,save space, without upgrading to Ground, save electricity, no dosing, low operating costs, high water quality, can be reused to the face, not only can provide workers with drinking water, but also for the underground equipment, such as the provision of emulsion water. Long service life of the whole equipment, low operating costs, a face can be completed to move to another face.Because of the hydrophobic porous membrane used for membrane distillation, it is easy to cause the membrane pores to be wetted in the case of membrane contamination, so that the membrane surface becomes hydrophobic and the treated water quality deteriorates. This paper proposes a dense nonporous membrane made of polyurethane. In addition, the micro-phase separation structure of the polyurethane material can accelerate the permeation rate of water molecules and improve the water flux of the membrane.In order to further improve the water flux of the membrane, this paper also proposed the use of hydrophilic zeolite and polyurethane made of dense film for membrane distillation. The pore size of the hydrophilic zeolite only allows the water molecules to pass through, and the molecules of the other salts are prevented from being separated. Therefore, the water flux of the Mixed Matrix Membrane made of zeolite and polyurethane can be greatly improved while ensuring a sufficiently high salt reject rate, and that is a more promising membrane material.