Recovery and Utilization Device of Zircon Sand Boiling Chlorination Tail Gas

Abstract

The invention relates to a recycling device for zircon sand boiling chlorination tail gas. The recycling device belongs to a preparation device of zircon halide, and comprises a tail gas storage device, a chlorine separation recovery device and a CO recovery storage device. Firstly, the chlorine in the tail gas is separated and collected, and is used as a raw material for zircon sand boiling chlorination reaction for cycle use; and then synthesis reaction in whichthe tail gas after separation of chlorine, serving as CO, participatesrefers toraw material utilization of a production device. The invention provides a device for completely recycling exhaust gas of a zircon sand boiling chlorination device, which can effectively utilize Cl2 and CO resources and reduce the emission of greenhouse gasCO2. The content of the recycled CO is more than or equal to 98.5%. The recycling rate of chlorine is more than or equal to 98.5%, and the recycling rate of CO is more than or equal to 99.0%. By virtue of complete recycling of the chlorine in the tail gas, 25-40% of the raw material cost of ZrCl4, SiCl4 and zirconium oxychloride products is reduced. The CO in the tail gas is completely recycled, and is used as a raw material of anammonia synthesisdevice, a methanol synthesis device or anacetic acidsynthesisdevice. Precious fossil resources are saved.

Description

Technical field [0001] The invention is a device for recovering and utilizing zircon sand boiling chlorination tail gas. It is a zirconium halide production device. Background technique [0002] Zircon sand is a zircon (ZrSiO) obtained by processing and beneficiating zircon minerals. 4 ) Concentrate, its theoretical composition is: ZrO 2 The content is 67.21%, SiO 2 The content is 32.79%. Zircon sand is the main raw material for producing metal zirconium and its chemical products. Used to prepare silicon tetrachloride, zirconium oxychloride and zirconium dioxide. [0003] The boiling chlorination process of zircon sand, namely the direct chlorination process of zircon sand, refers to the mixing and grinding of zircon sand and petroleum coke according to a certain ratio, and then introducing chlorine gas into the boiling chlorination furnace at a temperature of 950 to 1100°C. Reaction to generate zirconium tetrachloride (ZrCL 4 ) And silicon tetrachloride (SiCl 4 ) The process of...

AI Technical Summary

Problems solved by technology

Not only is it a waste of resources, but also there are safety hazards such as CO combustion, explosion, and poisoning

[0014] 3. CO produced by CO combustion enthalpy 2 , CO 2 It is the main greenhouse gas, which will intensify the greenhouse effect of the atmosphere, lead to global warming, and cause natural disasters, which seriously threaten the survival and development of human beings.

[0015] 4. In the prior art, Cl 2 As the main raw material of the chlorination reaction, due to the lack of recovery and recycling, the consumption of raw materials increases and the production cost of products increases.

[0016] 5. In the prior art, Cl 2 As the main raw material for the chlorination reaction, since there is no recovery and recycling, zircon sand and Cl 2 The molar ratio of zircon sand can only be maintained at about 1:6, which limits the reaction speed of zircon sand chlorination reaction

Affected the improvement of the production capacity of the device