High-quality continuous production system for isatoic anhydride

The utility model discloses a high-quality continuous production system for isatoic anhydride, which belongs to the field of isatoic anhydride production, and sequentially comprises a dissolving kettle, a degradation kettle, a hydrolysis kettle and a first solid-liquid separation device, a discharge hole of the second solid-liquid separation device is connected with a transfer tank; and the transfer tank is communicated with an inlet of the first solid-liquid separation device. According to the utility model, after the traditional isatoic anhydride mother liquor is subjected to solid-liquid separation again, new liquid is input into the sewage treatment device, and the discharge port is communicated with the feed port of the first solid-liquid separation device, so that solid-liquid separation of isatoic anhydride subjected to secondary solid-liquid separation is realized by utilizing the centrifugal machine; and the process not only can ensure that the mother liquor after the first solid-liquid separation is