Patent ID: 11920473
Assignee: NANCHANG UNIVERSITY
Field: Environmental technology (Chemistry)
Classification: CPC E  C  F | IPC C  E  F

Claim 9:
10. A method for integrated control of acid wastewater plugging and discharging of an abandoned mine, wherein, the method is applied to the device of claim 1, the method comprising:
starting an agent supply pump by the central controller and adding an agent into the mine water by the agent bucket when a pH sensor detects that a pH value of mine water is smaller than 6; and stopping the agent supply pump by the central controller when the pH sensor detects that the pH value of the mine water is larger than or equal to 6;
opening a gas supply valve by the central controller when a CO2 concentration sensor detects that a concentration of CO2 in the inner side of the airtight wall is lower than 90% or a O2 concentration sensor detects that a concentration of O2 in the inner side of the airtight wall is higher than 5%, supplementing CO2 gas to the inner side of the airtight wall by the CO2 gas source, CO2 gas arriving at a plurality of aeration discs by the gas conveying pipe, the CO2 gas being dissolved in the mine water in an aeration form to displace dissolved oxygen in the mine water, and meanwhile, the CO2 gas arriving a space above the mine water in the inner side of the airtight wall of the abandoned mine; and closing the gas supply valve by the central controller when the CO2 concentration sensor detects that the concentration of CO2 in the inner side of the airtight wall is higher than or equal to 90% or the O2 concentration sensor detects that the concentration of O2 in the inner side of the airtight wall is lower than or equal to 5%;
when a water level of the mine water is raised to the lower inlet of the first siphon pipe, the mine water starting to enter an inlet section of the first siphon pipe; when the water level of the mine water arrives to a highest position of the first siphon pipe, the mine water starting to enter an outlet section of the first siphon pipe to form a siphoning effect, the mine water being discharged continuously, and the water level of the mine water being declined from the highest position of the first siphon pipe to the upper inlet of the first siphon pipe due to the siphoning effect;
when the mine water is raised too fast and reaches an overflow port position of the overflow pipe, overflown mine water entering the liquid storage bucket, the liquid storage bucket declining due to increase of weight and driving the flood discharge valve to rise, and the flood discharging valve being opened to discharge flood; a second siphon pipe is arranged in the liquid storage bucket and is fixed to a porous floating body, the porous floating body absorbing water gradually and sinking, the second siphon pipe immersing in water within a period of time and water in the liquid storage bucket entering the second siphon pipe to form the siphoning effect, and the overflown mine water in the liquid storage bucket then being discharged, the liquid storage bucket rising due to decrease of weight and driving the flood discharge valve to decline, and the flood discharging valve being closed to plug the mine water in the airtight wall again;
when the flood discharge valve is required to be started in a forced manner, opening a liquid storage valve by the central controller, the mine water entering the liquid storage bucket through a liquid storage pipe, and the liquid storage bucket accumulating liquid internally to increase weight, the liquid storage bucket declining and driving the flood discharge valve to lift and start;, when the CO2 concentration sensor detects that the concentration of CO2 in the inner side of the airtight wall is lower than 85% for over 2 minutes or the O2 concentration sensor detects that the concentration of O2 in the inner side of the airtight wall is higher than 10% for over 2 minutes, starting the remote alarm by the central controller;
when a pressure sensor detects that a pressure value is lower than 0.3 MPa, starting the remote alarm by the central controller; and
when the pH sensor detects that the pH value of the mine water is smaller than 5.5 for over 10 minutes, starting the remote alarm by the central controller.