Device for improving titanium tetrachloride refining heat exchange efficiency and method thereof

Abstract

The invention relates to a device for improving titanium tetrachloride refining heat exchange efficiency and a method thereof, the device comprises a water atomization device and a vaporization unit, a spray head in the water atomization device is installed on a steam pipeline at the inlet end of a heat exchanger and is used for spraying water mist into the steam pipeline, and the spray head is arranged at the position, close to the superheated steam inlet end, of the steam pipeline; the vaporization unit is a venturi tube, and the venturi tube is arranged in the steam pipeline at the downstream of the spray head and used for vaporizing the water mist and mixing the vaporized water mist with the superheated steam to obtain saturated steam; according to the method for improving the titanium tetrachloride refining heat exchange efficiency, the superheated steam is converted into saturated steam, and the steam temperature is reduced. On one hand, the problem that the refining yield is influenced by outsourcing steam flow fluctuation in winter can be solved, and production is met under low steam pressure; on the other hand, steam can be directly saved by 3-4 t / h, and cost reduction and efficiency improvement are achieved.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal smelting equipment, and in particular relates to a device and method for improving the heat exchange efficiency of titanium tetrachloride refining. Background technique [0002] At present, the industrial production of sponge titanium is mainly the method of reducing titanium tetrachloride with liquid magnesium at high temperature. In the reduction reaction process, excess liquid magnesium is firstly added into a closed reactor, and then titanium tetrachloride is continuously added. As an important part of the production of sponge titanium, a large amount of steam needs to be used as energy in the refined production of titanium tetrachloride; Gasification occurs, and titanium tetrachloride gas can come out from the top of the primary distillation tower and the secondary distillation tower. The temperature of titanium tetrachloride after heating is 140~160°C, so it can be inferred that t...

AI Technical Summary

Problems solved by technology

When the superheated steam passes through the refining heat exchanger, the latent heat of the steam cannot be effectively utilized, the outlet steam pressure is still greater than 0.4MPa, the temperature is greater than 160°C, and the steam utilization rate is extremely low; and when the steam pressure is low (less than 0.8MPa), the refining heat load Insufficient, extremely low output, great impact on production and quality

[0004] In addition, the thermal stress generated by the superheated steam on the surface of the heat exchanger tube will greatly shorten the service life of the heat exchanger

Continued excessive introduction of superheated steam will also cause cracking of the weld seam of the heat exchanger tube, and the steam will enter the titanium tetrachloride, resulting in an increase in the oxygen content of titanium tetrachloride and fluctuations in the oxygen content of titanium sponge

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