a burning ring

Abstract

The invention discloses a combustion ring, which comprises a volute with radial through holes, a titanium tetrachloride gas channel and an oxygen channel, and is characterized in that the hole wall surface of the radial through hole is provided with a cooling medium A jacket, and the end of the jacket does not extend to the end of the radial through hole; an annular chamber is provided in the volute, and a first passage is provided between the annular chamber and the outer wall of the volute, A second channel is provided between the end of the radial through hole; the end of the radial through hole forms a mixed reaction zone of titanium tetrachloride and oxygen. The present invention increases the flow rate of titanium tetrachloride gas entering the reaction zone by setting the first passage, the annular chamber and the second passage, which is beneficial to fully mixing and reacting with oxygen to obtain a suitable particle size of titanium dioxide. In addition, a jacket is installed on the inner wall of the volute, and high-temperature oxygen passes through the center of the jacket. A more effective water cooling method can be used in the jacket to more effectively block the corrosion of the combustion ring by high-temperature oxygen.

Description

【Technical field】 [0001] The present invention belongs to the technical field of titanium dioxide production equipment, specifically relates to a combustion ring of titanium tetrachloride oxidation reaction. 【Background】 [0002] In the production process of chlorinated titanium dioxide, the most important thing is the oxidation reaction, that is, the reaction of titanium tetrachloride and oxygen. Because the oxidation reaction requires the mixed material to reach a very high temperature, it is necessary to heat the oxygen to about 1500 ° C and titanium tetrachloride to about 500 ° C alone. Due to the high oxygen temperature, it will produce high temperature corrosion on the feeding ring, and the heat generated by the reaction will also cause damage to the feeding ring if it cannot be removed in time. [0003] In order to block or reduce high temperature corrosion, the most commonly used method is to open a number of small holes in the inner wall of the combustion ring, and then ...

AI Technical Summary

Problems solved by technology

However, the disadvantage of using cooling gas is that the specific heat capacity of the gas is too small. If the amount of cooling gas introduced is low, the combustion ring cannot be effectively protected from corrosion, and the inner wall of the combustion ring will usually be corroded, so the entire combustion ring needs to be replaced.

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