| Autor: |
Mohamed abdul kareem al-sofi, Salman Khalaf, Adnan Al-Omran |
| Rok vydání: |
1989 |
| Předmět: |
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| Zdroj: |
Desalination. 73:313-325 |
| ISSN: |
0011-9164 |
| DOI: |
10.1016/0011-9164(89)87021-3 |
| Popis: |
Desalination is becoming the vital source of domestic water for the Arabian Peninsula. Reliance on desalination is particularly pronounced along the east coast, i.e. Gulf Coast of Saudi Arabia and other Gulf Cooperation Council (GCC) States. Todate the primary process deployed along the Gulf is Multi-Stage Flash (MSF) evaporation. MSF performance relies primarily on heat transfer between vapour and brine solution along a temperature range of 25–121 Degree C. Almost all MSF evaporators in this region are operated by brine recirculation to improve efficiency and thus reduce cost. Yet recirculation mandates heat transfer with concentrated sea water solution. Due to the concentrated nature of the heat transfer medium, scaling is the most critical factors controlling MSF productivity, especially upper half of the said temperature range. Scale formation cannot be eliminated, but it can be combated. It is particularly essential to minimize scale formation on heat transfer surfaces i.e. tubes inner surfaces. Minimum scale presence in tubes is achieved by either formation prevention or removal. This paper covers five cases: a thru E. Case A pertains to a medium capacity evaporator of 2–3 MIGD distillate production. Case B is a special trial on ball cleaning at an optimized low antiscalant dose rate. This trial was on one of the larger capacity MSF evaporators. Trial B was performed on a 5–7 MIGD evaporator, while cases C thru E are on a third group of evaporator of 5–6 MIGD production capacity. In this last group the three cases are: • C is an antiscalant optimization trial. • D is related to general observations on day to day optimized operation of this group of evaporators and • E is another antiscalant optimization trial. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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