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GEA PARAFORMALDEHYDE PLANT

IP.com Disclosure Number: IPCOM000243838D
Publication Date: 2015-Oct-20
Document File: 1 page(s) / 68K

Publishing Venue

The IP.com Prior Art Database

Related People

Karin Nordström Dyvelkov: CONTACT

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PARAFORMALDEHYDE PLANT: IP.COM

Abstract

Since 2004 GEA has successfully delivered Paraformaldehyde Production Plants which typically consist of 5 process stages a 1 or 2 stage concentration unit followed by a 3 stage spray congealing fluid bed drying fluid bed cooling unit in closed cycle configuration

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GEA PARAFORMALDEHYDE PLANT

GEA PARAFOMALDEHYDE PLANT CONCEPT

Since 2004 GEA has successfully delivered Paraformaldehyde Production Plants which typically consist of 5 process stages:

• a 1 or 2-stage concentration unit followed by • a 3-stage spray congealing + fluid bed drying + fluid bed cooling unit in closed cycle configuration

PROCESS DESCRIPTION

Concentration

The Formaldehyde fed from the feed tank has a concentration of 35-60%, typically 50%. It will be supplied level controlled to the 1st stage evaporator if the formaldehyde concentration is <60%. If the formaldehyde concentration is approx. 60% only 1 evaporator may be required, depending on the requested plant capacity.

The pre-concentrated product from the 1st stage evaporator - approx. 75% now - is supplied to the 2nd stage evaporator, where it will be further concentrated to approx. 85% by weight formaldehyde.

The evaporators may e.g. be of the falling film type or thin film type or a combination of these.

Necessary vacuum is generated with 2 separately installed liquid (water) ring vacuum pumps.

The distillates from both concentration steps are formaldehyde solutions to be used for other purposes or can be partly recycled to the formaldehyde plant.

Spray Congealing, Fluid Bed Drying and Fluid Bed Cooling
The spray congealing unit (often referred to as a spray cooler) and the fluid bed dryer are in the same closed cycle loop with nitrogen as cooling/drying gas at a slightly increased pressure.

The concentrated liquid formaldehyde from the c...