Recovery of mineral salts and potable water from desalting plant effluents by evaporation. Part II. Proposed simulation system for salt recovery

Journal Article · Sun Apr 01 00:00:00 EST 1990 · Separation Science and Technology; (USA)

DOI:https://doi.org/10.1080/01496399008050342· OSTI ID:6278940

Abdel-Aal, H K; Ba-Lubaid, K M; Shaikh, A A; Al-Harbi, D K ^[1]

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1. King Fahd Univ. of Petroleum and Minerals, Dhahran (Saudi Arabia)

Salt recovery from rejected brines of the Al-Khobar Water Desalination Plant, Saudi Arabia, is studied through the simulation of a modified MSF system. Two phases of concentrations are planned: Phase I will concentrate the main effluent from 6.4 wt% total salt to 28.8%, while Phase II will use the effluents from Phase I as a feed to undergo further evaporation and cooling. NaCl and water are produced throughout this phase, while the end residue product will be essentially MgCl{sub 2}, since it is the most soluble. A mathematical model is developed and used to perform stage-to-stage material and heat balance calculations. Concentrations of NaCl and MgCl{sub 2} in the streams entering and leaving a stage are determined by using the solubility correlation developed in Part I. Simulation results show that by using 5,210 tons/h brine as a feed for Phase I, they can recover 4,430 tons/h fresh water, 277 tons/h NaCl, and 502 tons/h bittern (in which the ratio of MgCl{sub 2}/NaCl is increased to 12) as the very final products of the integrated scheme. This bittern provides 30 tons/h MgCl{sub 2} as an end product.

• OSTI ID: 6278940
• Journal Information: Separation Science and Technology; (USA), Vol. 25:4, Issue 4; ISSN 0149-6395
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
42 ENGINEERING
DESALINATION PLANTS
SIMULATION
CHEMICAL EFFLUENTS
DRINKING WATER
MAGNESIUM CHLORIDES
MATHEMATICAL MODELS
MINERALS
SEAWATER
ALKALINE EARTH METAL COMPOUNDS
CHLORIDES
CHLORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
INDUSTRIAL PLANTS
MAGNESIUM COMPOUNDS
OXYGEN COMPOUNDS
WATER
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)
420200 - Engineering- Facilities
Equipment
& Techniques