The invention discloses a closed circulation
system for improving gas drainage pump running efficiency. A liquid inlet of a pneumatic
diaphragm pump is connected with a liquid outlet of a
macromolecule drag reduction solution tank, and a liquid outlet
pipe of the pneumatic
diaphragm pump is led into a circulation
water pool. The
macromolecule drag reduction solution tank is internally provided with a pneumatic stirrer, and a feeding hopper is arranged at the top. A liquid outlet of a sinking pump is connected with a liquid inlet of the
macromolecule drag reduction solution tank and a liquid inlet of a gas drainage pump through a tee joint, and a liquid drainage
pipe of the gas drainage pump is connected into the circulation
water pool. The pneumatic stirrer and the pneumatic
diaphragm pump run at a high speed so that a macromolecule drag reduction solution can be fed into the circulation
water pool after being evenly mixed; and meanwhile, a liquid outlet
pipe of the sinking pump supplies water to the macromolecule drag reduction solution tank, a macromolecule drag
reducer is added into the feeding hopper, and continuous liquid preparation and using after preparation instantly of the drag reduction solution can be achieved. The gas drainage pump uses the macromolecule drag reduction solution as a working medium, and the gas drainage pump running efficiency can be greatly improved. The
system is simple in structure and convenient to operate, and drag reduction solution supply closed circulation is achieved.