GASIFICATION PROCESS EMPLOYING AMMONIA INJECTION FOR MINIMIZING WASTE WATER TREATMENT

A basic material (17), preferably ammonia, is injected into the stream of soot water leaving the gasification reactor (10) prior to being processed in a filtration-type soot removal unit (28). The elevated pH of the soot water causes more metals to remain in the filter cake. Thus, the metals content...

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Bibliographic Details
Main Author TSANG, CHIH-HAO, MARK
Format Patent
LanguageEnglish
French
Published 20.03.2003
Edition7
Subjects
CARBURETTING AIR OR OTHER GASES
CHEMISTRY
COMPOUNDS THEREOF
FUELS
INORGANIC CHEMISTRY
LUBRICANTS
METALLURGY
NON-METALLIC ELEMENTS
PEAT
PETROLEUM, GAS OR COKE INDUSTRIES
PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROMSOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES
TECHNICAL GASES CONTAINING CARBON MONOXIDE
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Summary:A basic material (17), preferably ammonia, is injected into the stream of soot water leaving the gasification reactor (10) prior to being processed in a filtration-type soot removal unit (28). The elevated pH of the soot water causes more metals to remain in the filter cake. Thus, the metals content of the grey water is reduced. More grey water can then be recycled back to the gasification reactor (10), with less grey water being handled by the wastewater treatment unit (34). Un matériau basique (17), de préférence l'ammoniac, est injecté dans le flux d'eaux de ramonage sortant du réacteur de gazéification (10) avant son traitement dans un filtre à suies (28). Le pH élevé des eaux de ramonage fait que le gâteau de boue retient une quantité élevée de métaux, et par conséquent que la teneur en métaux des eaux grises est moindre. Il est ainsi possible de recycler vers le réacteur de gazéification (10) une quantité accrue d'eaux grises, ce qui fait que l'unité de retraitement des eaux usées (34) aura autant d'eaux grises en moins à traiter.
Bibliography:Application Number: WO2002US20263