Treatment system and treatment method for high-temperature titanium tetrachloride dusty gases

Abstract

The invention discloses a treatment system and a treatment method for high-temperature titanium tetrachloride dusty gases, the system comprises a chlorination furnace, a rotary kiln, a cooling kiln, an elution tower, an elution tower collection tank, a centrifugal machine, a coarse titanium tetrachloride preheater, an elution tower II, a circulating tower heat exchanger I, a circulating tower heatexchanger II, a coolant heat exchanger and a coarse titanium tetrachloride middle tank, the treatment method includes the steps of wet slag baking, condensing and pulping, solid-liquid separation, feedstock heat exchange, primary cooling and secondary cooling, the treatment system and the treatment method have the advantages that existing chilling and gas-solid separation steps are omitted, the wet chlorinated-slag baking step, the condensing and pulping step and the solid-liquid separation step are provided, and accordingly, the recovery rate of titanium tetrachloride is increased by about 1%; in the feedstock heat exchange step, less steam can be used for heating coarse titanium tetrachloride with the temperature of 110-119 DEG C to a set temperature before refining, and accordingly, obvious economic effects are achieved.

Description

technical field [0001] The invention relates to the technical field of titanium tetrachloride production and titanium dioxide production by a chlorination method, in particular to a treatment system and method for high-temperature titanium tetrachloride dust-containing gas. Background technique [0002] The main process steps of titanium tetrachloride production are: batching → chlorination → refining, while the main process steps of titanium dioxide production by chlorination are: batching → chlorination → refining → oxidation → post-treatment, so the production of titanium tetrachloride and chlorination The chlorination section is very important in the production of titanium dioxide by titanium dioxide. The chlorination section includes a reaction process, a separation process, a primary condensation collection process and a secondary condensation collection process, and the chlorinated gas coming out of the chlorination furnace in the reaction process is The high-temperat...

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Problems solved by technology

Disadvantages: 1. Only rely on gravity sedimentation to separate the particles in the gas, so the cross section of the air flow needs to be large enough to reduce the flow velocity of the air flow, otherwise the particles will be taken to the downstream process by the air flow, the larger the gas volume, the greater the cross section Bigger means bigger device

Compared with the first method, the phenomenon of "loosening" is also prone to occur when driving, because the dusty gas contains gaseous titanium tetrachloride and gaseous metal chloride, and after contacting the cold wall of the cyclone dust collector, both of them will drop to the dew point and below the freezing point, liquid and solid appear, blocking the outlet at the bottom of the cyclone, resulting in poor discharge

In addition, under abnormal conditions or when the production load is greatly reduced, analyze according to the centrifugal force fo

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