A kind of titanium tetrachloride preheater

Abstract

The invention discloses a titanium tetrachloride preheater, which comprises an L-shaped combustion section, a mixing section, a convection section, a preheating section and a chimney, and is characterized in that: the high-temperature flue gas produced by the combustion section After mixing evenly in the mixing section, heat exchange is performed with the heating coil in the convection section. The burner is located at the end of the horizontal combustion section, and the inlet end of the combustion section is provided with an eccentric annular flue gas channel with a wide top and a narrow bottom. The invention is safer A reliable titanium tetrachloride preheater with higher thermal efficiency can overcome various problems existing in the existing titanium tetrachloride preheater.

Description

technical field [0001] The invention relates to the technology and equipment for heating titanium tetrachloride in large and medium-sized chlorination titanium dioxide devices. Background technique [0002] At present, in the domestic chlorination titanium dioxide production industry, the titanium tetrachloride preheating furnace mainly adopts a vertical structure main body, the lower part is a radiation section, the upper part is a convection section, the top is a chimney, and the furnace body of the radiation section is equipped with a spiral The bottom of the furnace is equipped with a burner, and the high-temperature radiant heat generated by the burner directly heats the spiral coil, and the heated titanium tetrachloride is vaporized in the radiation section and overheated to the temperature required by the process, and then flows from the bottom of the radiation section There is a horizontal coil in the upper convection section. After heat exchange in the radiation sec...

AI Technical Summary

Problems solved by technology

[0003] Its shortcomings are: 1. In the radiant section of the titanium tetrachloride preheater, the coil will be unevenly heated due to unstable flame control or installation deviation, and the overheated part will affect the life of the coil material. Part of it will form condensation corrosion on the corrosive gas in the combustion gas, and it will also cause corrosion to the material of the coil; 2. The thermal efficiency of the preheater is low. Due to the vertical furnace structure, most of the high-temperature gas generated by the burner has not yet Timely heat exchange is directly discharged from the chimney through the furnace. Although there is a convection section to collect the heat of the high-temperature flue gas, the overall thermal efficiency is about 70%.

Images