Bag type dust collector for producing silicon tetrachloride by direct method

The invention relates to a bag type dust collector for producing silicon tetrachloride by a direct method. The bag type dust collector comprises an outer shell body and a plurality of bag devices, wherein a baffle plate is arranged in the outer shell body to divide the outer shell body into a dust collecting chamber and a gas outlet chamber, the bag devices are fixedly arranged on the baffle plate, a gas inlet of the dust collector is arranged above the dust collecting chamber, a dust outlet is arranged at the bottom of the dust collecting chamber, a fine powder recycling tank is arranged below the dust outlet, a gas outlet of the dust collector is arranged on the side wall of the gas outlet chamber, a heating jacket is arranged on the outer side wall of the dust collecting chamber, and a plurality of bag devices are all made of high-temperature resistant materials. According to the bag type dust collector, a small quantity of fine silicon powder in the gas crude product is recycled through the bag type dust collector, therefore, most of silicon powder in the silicon tetrachloride crude product gas is removed, and the dust collection operation in the following process is avoided.