Chlorine refining production apparatus

Abstract

The invention relates to a chlorine refining production apparatus. The chlorine refining production apparatus is mainly formed by a chlorine rectifying tower and a tower bottom re-boiler, wherein thechlorine rectifying tower is provided with multiple layers of tower trays, each layer of tower tray is provided with overflow holes, the overflow holes in the adjacent tower trays are alternately arranged, the chlorine rectifying tower is provided with a liquid chlorine inlet, the liquid chlorine inlet is formed in the middle-upper portion of the chlorine rectifying tower, the bottom of the chlorine rectifying tower is provided with a liquid chlorine outlet, the liquid chlorine outlet is connected with the tower bottom re-boiler, an outlet of the tower bottom re-boiler is connected with a vaporized chlorine inlet in the lower portion of the chlorine rectifying tower, and a middle side line of the chlorine rectifying tower is provided with a high-purity chlorine outlet. The calibrated capacity of the apparatus after being put into production is as follows: the material feeding amount reaches 31.2 t / h, the extraction amount of the side line high-purity chlorine reaches 28.1 t / h, and theextraction amount on the tower bottom and the tower top is 3.1 t / h. The high-purity chlorine capable of being obtained by the apparatus has the characteristics that the carbon dioxide content is smaller than 20ppm, the oxygen content is smaller than 20ppm, the nitrogen content is smaller than 50ppm, the water content is smaller than 5ppm, and the purity of the chlorine reaches up to 99.99 percentor higher. The floor occupation area of the chlorine refining production apparatus is small; and compared to an original device, no power consumption is increased.

Description

Technical field [0001] The invention provides a chlorine gas purification production device. Background technique [0002] The purity of the chlorine gas from the electrolytic cell is about 98.8%, and it also contains impurities such as carbon dioxide, oxygen, nitrogen, and hydrogen. Some downstream chlorine products need to use chlorine with less impurities and high purity as raw materials, such as trichloroethylene, tetrachloroethylene, and chloropropylene. At present, the production method of chlorine purification and purification is mainly to cool the chlorine gas after sulfuric acid drying at a certain pressure and temperature with cold water or circulating water to condense the gaseous chlorine into a liquid state, and use the difference between the boiling point of chlorine and impurities to make low-boiling impurities Get separated. Chlorine gas with a lot of impurity gas is used to produce products that do not require high chlorine purity, such as hydrochloric acid and...

AI Technical Summary

Problems solved by technology

The main disadvantage of this production method is: although the purity of chlorine gas has been improved after liquefaction and vaporization, the content of carbon dioxide, nitrogen and oxygen in chlorine gas is still relatively high. 500ppm, nitrogen content 300-500ppm, water content 100-200ppm, chlorine purity between 99.6-99.8%

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