Device for removing sodium oxalate in production process of aluminum oxide and fine aluminum oxide

The invention discloses a device for removing sodium oxalate in a production process of aluminum oxide and fine aluminum oxide. The device consists of a crystallizer reaction tank, a heat exchanger and a filter press, wherein a mother liquor feeding hole, a seed crystal feeding hole and an alkali feeding hole are formed in the top of the crystallizer reaction tank, a stirrer is arranged in the crystallizer reaction tank and assembled with a variable frequency driving system, and the lower portion of the crystallizer reaction tank is communicated with the heat exchanger, and is also provided with a discharge hole connected with the inlet of the filter press through a pipeline. According to the invention, through the temperature control device and the stirring device, the reaction temperature and the stirring speed in the decomposition process are controlled, and alkali concentration is controlled, so that low-temperature reaction at the temperature of 100 DEG C or below can be achieved, production is easy to o