Dedusting air volume automatic control system

The utility model discloses a dust removal air volume automatic control system which comprises a main control cabinet, a main controller is fixed in the main control cabinet, the main controller is in signal connection with a split operation box, the split operation box is in signal connection with a proximity switch, and the proximity switch is electrically connected with a gate valve. During manual operation, each electric furnace gate valve and each salt pot gate valve can be independently controlled in an automatic mode, a knob on the split operation box is shifted to an automatic state, the controller enables the valve of the change-over switch in a'salt adding 'state to be opened to the maximum, the valve of the change-over switch in a'non-salt adding' state to be opened to a set angle, and the knob on the split operation box is shifted to the automatic state; if not, the controller enables the valve to be opened to the maximum, if not, the valve is closed, the dust removal fan can automatically adjust