Rectification dehydration tower and dehydration method for nitrogen dioxide
A technology of nitrogen dioxide and dehydration tower, which is applied in the direction of nitrogen dioxide, nitrogen oxide/oxyacid, liquefaction, etc., and can solve the problem that the top product cannot meet the established requirements and other problems
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[0054] Such as figure 1 As shown, a nitrogen dioxide rectification dehydration tower is provided with a condensation section 3, a rectification section 1 and a reboiler section 2 from top to bottom in the rectification dehydration tower, and the reboiler section 2 is provided with a heat medium introduction pipe 5a and heat medium outlet pipe 5b; the condensation section 3 is provided with a cold medium introduction pipe 6a and a cold medium outlet pipe 6b; the middle part of the dehydration distillation tower is provided with a nitrogen dioxide feed pipe 4a. The nitrogen dioxide feed pipeline is provided with a regulating valve 4b.
[0055] The nitrogen dioxide raw material enters the rectification and dehydration tower for rectification.
[0056] The gas pressure at the top of the rectification dehydration tower is controlled by adjusting the feed flow rate, and the pressure adjustment setting value is 0.23MPaG.
[0057] Dehydration tower feed: phase state (two-phase flow)...
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