1, ambient temperature: 0 ℃ ~ + 40 ℃, relative humidity 97%, at an elevation of less than 1000m. 2, the working system: continuous type, suitable for containing explosive gas (methane) and coal dust in coal mine water emulsion softened water treatment and pumping stations. 3, to adapt to the roadway: the installation of the horizontal gradient of no more than 3 °; roadway width 3.6m, height 3.6m. 4, underground water pipe water hardness of 528mg / L, softened water treatment equipment requires the ability to deal with the hardness of not less than 600mg / L. Effluent hardness of less than 120mg / L, consistent with People's Republic of China coal industry standards: MT76-2002, and circulating water standards.