Submerged combustion heating water evaporation for natural gas wells

A method for evaporating waste water from a natural gas well having dissolved solids therein, the method comprising:

• providing a holding tank having an inlet for receiving waste water, a submerged combustion chamber with burner suspended within the holding tank, the submerged combustion chamber having a plurality of vertical slots defined therein near a bottom thereof which span a substantial portion of a height of the submerged combustion chamber, and a vent stack coupled to an upper portion of the holding tank for allowing water vapor to exit the holding tank;
• providing the burner with air under positive pressure and natural gas from the natural gas well;
• and,
• burning the natural gas with the burner to generate hot combustion gases under positive pressure within the submerged combustion chamber such that a liquid level within the submerged combustion chamber is lower than a liquid level within the holding tank and the hot combustion gases exit the submerged combustion chamber through the vertical slots and bubble upwardly through liquid in the holding tank.