Solvent recovery method for supercritical CO2 drying in silicon-based aerogel production
A recovery method and supercritical technology, applied in separation methods, gel preparation, vapor condensation, etc., can solve the problems of increasing the difficulty of equipment production, large processing capacity of the compressor 20, loss of carbon dioxide raw materials, etc., and reduce energy consumption. and equipment manufacturing and processing difficulty, reducing equipment investment, and reducing the effect of raw material investment
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[0029] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0030] The specific implementation of the present invention is embodied in three aspects: 1. A first-stage condenser is added at the gas phase outlet of the separation kettle to fully condense the solvent and recover it downstream by flash distillation. 2. Multi-stage flash compression is set downstream of the liquid phase of the separation kettle, and the flash pressure is reasonably selected and controlled to fully separate the solvent and carbon dioxide. 3. Add a rectification...
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