Diatomite filtering system

The utility model relates to the field of filtering, in particular to a diatomite filtering system. The diatomite filtering system comprises a main filtering tank, the main filtering tank is internally provided with a filtering device, the filtering device is used for filtering product liquid entering the main filtering tank, and the main filtering tank further comprises a fed-batch inlet; the mixing tank is communicated with the main filtering tank and is used for accommodating a mixed solution formed by the diatomite and the product solution; the metering pump is arranged in a pipeline between the fed-batch inlet and the mixing tank; and the pressure sensor is in communication connection with the metering pump and is used for detecting the pressure of the mixed liquid entering the fed-batch inlet. According to the diatomite filtering system provided by the utility model, the mixing tank can convey a mixed solution with a suitable feeding amount in a suitable range into the main filtering tank, so that the f