DMF Solvent Recovery & Distillation System for Sale
Phoenix Equipment Corporation
Buying and Selling Chemical Plants & Equipment
***Other possible applications include: DMAC (Dimethylacetamide) Solvent Recovery***
Phoenix recently acquired this used skid-mounted DMF (Dimethylformamide) distillation system, which is now available for sale. See more information below including full plant details and equipment included.
This DMF Recovery and Distillation System was designed by KOCH to recover 14-35% DMF from wastewater. The system consists of a Distillation Column (CL-7001) with Koch-Glitsch valve trays, Feed Preheater (HE-7001), Steam Heater (HE-7002), Reboiler (HE-7003), Product Cooler (HE-7004), Column Condenser (HE-7005), Bottom Purge Cooler (HE-7006), Heat Recovery Condenser (HE-7007), Reflux Drum (TK-7002), Bottoms Pump (PU-7002), Product Pump (PU-7003), and Reflux Pump (PU-7004). Utilities consist of steam, cooling water, electricity, and instrument air. The wastewater feed containing DMF, water, and formic acid is fed via Feed Preheater (HE-7001) and Steam Heater (HE-7002) to the Distillation Column (CL-7001) operating at atmospheric pressure. The column bottoms are circulated by pump PU-7002, through Reboiler (HE-7003) where 180 psig steam is used to generate vapors to strip water from the feed. The formic acid in the feed forms a maximum boiling point azeotrope with the DMF and is rejected in a small purge stream from the reboiler loop. Prior to leaving the unit this purge stream is cooled in the Bottoms Purge Cooler (HE-7006) to 115°F and filtered by 3-stage dual cartridge filters. Part of the filtered purge stream is recycled to the suction of pump PU-7002 as coolant for the magnets. A vapor side draw is taken which contains the dry DMF product. The vapor product is condensed on the shell side of feed preheater (HE-7001) and then cooled to 115°F in Product Cooler (HE-7004) using 85°F cooling water. The vapor from the stripping section, containing steam and a small quantity of DMF, is condensed in Column Condenser (HE-7005) and subcooled to 140°F. The condensate flows by gravity to the Reflux Drum from where it is pumped by PU-7004, either returning to the column as reflux or to battery limits of the system for disposal. When the Heat Recovery Condenser (HE-7007) is in service, the vapors are first partially condensed in HE-7007 by 35% wt Propylene Glycol before passing to HE-7005 for remaining condensation and subcooling as before. The DMF product contains less than 150 ppm water wt. The DMF concentration in the distillate product is less than 0.1% wt.
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