High-purity quartz sand sewage treatment system and treatment method

The invention discloses a high-purity quartz sand sewage treatment system and method. The system comprises a waste liquid mixing tank, a reaction tank, a mixing mechanism and a communicating pipe, a feeding hole is formed in the top of the waste liquid mixing tank; a first chamber, a second chamber and a third chamber are sequentially formed in the reaction tank from top to bottom, a reaction cylinder is arranged in the first chamber, and flocculation assemblies are arranged in the second chamber and the third chamber; the mixing mechanism comprises a first mixing end and a second mixing end, the first mixing end is arranged in the waste liquid mixing tank, and the second mixing end is arranged in the reaction cylinder; the communicating pipe is used for communicating the waste liquid mixing tank, the reaction tank and the precipitation mechanism with one another. The sewage treatment device provided by the invention has the beneficial effects that the technical problem that sewage discharge does not reach th