INSTALLATION FOR REMOVAL OF SULFATES AND SOLID SUSPENSIONS FROM PHOSPHORIC ACID Russian patent published in 2008 - IPC C01B25/234 

FIELD: chemistry.

SUBSTANCE: installation includes multi-sectional reactor for desulfation with mixers in each section, supplied with line of initial acid feeding and system of feeding of calcium-containing reagent, which consists of successively connected bunker, metering device and mixer, which provides feeding of reactor with uspension of calcium-containing reagent. All reagents are supplied to first section of reactor. Last section is supplied with submersible pump for pumping out reaction suspension, connected with acid communications with two thin-layered precipitation tanks, operating parallelly. Precipitation tanks are supplied with flocculators, packet of plates and mixers and have communications for supply of desulfated suspension, floculant solution and washing water, as well as for removal of clarified desulfated extraction phosphoric acid, condensed pulp and washing waters into collectors, supplied with pumps. Supply of reagents to installation and removal of production and slime acid are carried out continuously.

EFFECT: continuity of installation operation, increase of degree of desulfation and specific productivity in clarification and improvement of operation conditions

1 dwg, 1 ex