The invention discloses a
waste gas purifying treatment technology for reusing an internal circulation solution. The purifying treatment technology comprises the following steps: 1, collecting target treatment waste gases generated by a
waste gas generation source by a gas collection hood, and conveying the collected waste gases to a
waste gas purifying
tower through a main gas tube, and allowing the waste gases to upward flow from the lower portion of the waste gas purifying
tower and to be purified by a downward flowing circulation solution, wherein the circulation solution is repeatedly recycled until saturation and failure; and 2, lifting a failure circulation solution in a circulation solution tank to a coagulation reaction tank through a
circulating pump, carrying out a coagulation reaction, allowing the coagulated failure circulation solution to automatically flow into a
flocculation reaction tank, carrying out a
flocculation reaction, allowing the flocculated solution to automatically flow into a high efficiency
sedimentation tank, and allowing the purified circulation solution to flow into the circulation solution tank. The failure circulation solution is coagulated, flocculated and deposited to obtain the purified circulation solution, and the purified circulation solution is reused, so the cost is saved,
pollution is reduced, and energy saving and emission reduction requirements are met; and the technology also has the advantages of concise flow, stable recycling and small occupied area.