{"id":9239,"date":"2020-06-30T18:56:47","date_gmt":"2020-06-30T10:56:47","guid":{"rendered":"https:\/\/dmi65.com\/industries\/traitement-de-leau-pour-la-production-delectricite\/"},"modified":"2020-06-30T18:56:47","modified_gmt":"2020-06-30T10:56:47","slug":"traitement-de-leau-pour-la-production-delectricite","status":"publish","type":"page","link":"https:\/\/dmi65.com\/fr\/industries\/traitement-de-leau-pour-la-production-delectricite\/","title":{"rendered":"Traitement de l\u2019eau pour la production d\u2019\u00e9lectricit\u00e9"},"content":{"rendered":"

[vc_row][vc_column][vc_column_text css=\u00a0\u00bb.vc_custom_1593503585420{margin-top: 15px !important;margin-bottom: 15px !important;}\u00a0\u00bb]Traitement de l\u2019eau pour la production d\u2019\u00e9lectricit\u00e9 :<\/strong> En janvier 2016, Quantum Filtration Medium a effectu\u00e9 une s\u00e9rie de visites sur place afin d\u2019\u00e9valuer les options de modernisation de l\u2019usine de traitement de l\u2019eau qui fournit de l\u2019eau \u00e0 la centrale de Kuala Langat (KLPP).<\/a> L\u2019objectif \u00e9tait de mettre en \u00e9vidence les options \u00e0 faible co\u00fbt avec un faible impact sur la capacit\u00e9 de l\u2019usine \u00e0 accro\u00eetre la performance, l\u2019efficacit\u00e9 et la fiabilit\u00e9 de l\u2019usine, et la capacit\u00e9 de mieux faire face aux changements saisonniers de charge rencontr\u00e9s dans l\u2019approvisionnement en eau brute.<\/p>\n

L\u2019exploitation de KLPP a commenc\u00e9 depuis 1996 \u00e0 l\u2019aide de turbines \u00e0 gaz \u00e0 cycle combin\u00e9 et l\u2019usine contribue actuellement \u00e0 hauteur de 675 MW de capacit\u00e9 de production d\u2019\u00e9lectricit\u00e9 au r\u00e9seau. La capacit\u00e9 de l\u2019usine \u00e0 fournir de l\u2019\u00e9lectricit\u00e9 au r\u00e9seau conform\u00e9ment \u00e0 son obligation en vertu de l\u2019accord d\u2019achat d\u2019\u00e9lectricit\u00e9 d\u00e9pend d\u2019un certain nombre de facteurs, y compris un approvisionnement fiable en eau propre aux fins du refroidissement. En moyenne, KLPP tire 20 000 m\u00e8tres cubes d\u2019eau trait\u00e9e pour son fonctionnement quotidien. Pour un fonctionnement optimal et la dur\u00e9e de vie de la plante, l\u2019eau doit \u00eatre aussi propre que possible avec une faible teneur en substance organique ou inorganique qui aurait un impact sur le fonctionnement de la plante.<\/p>\n

Il y a quatre secteurs principaux de l\u2019usine o\u00f9 le potentiel d\u2019am\u00e9liorations consid\u00e9rables a \u00e9t\u00e9 identifi\u00e9.
\n\u2022 La possibilit\u00e9 d\u2019ajouter de l\u2019eau de forage \u00e0 l\u2019approvisionnement en eau brute
\n\u2022 Clarification de l\u2019eau brute avant d\u2019entrer dans la plante
\n\u2022 Optimisation du programme de d dosage flocculent\/polym\u00e8re (type inc. et taux de dosage)
\n\u2022 Changement des m\u00e9dias dans les filtres \u00e0 sable rapides en DMI65\u00ae[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text css=\u00a0\u00bb.vc_custom_1593503610377{margin-bottom: 0px !important;}\u00a0\u00bb]BORE WATER ADDITION<\/strong><\/p>\n

It was suggested that the area surrounding the plant be assessed for suitability and potential quality and quantity of several bores to add to the plant raw water supply. The addition of bores would not only provide greater flexibility in terms of seasonal blending with river water to ensure sufficient quantities of water in the dry season, could also be used to lower suspended solids and turbidity loadings on the plant during the wet season.<\/p>\n

There is a likelihood that there will be traces of iron and manganese in the bore water, but the use of DMI65 filtration media will remove this and provide an improvement to the usual mechanical filtration duties.<\/p>\n

CLARIFICATION<\/strong><\/p>\n

The high turbidity and suspended solids levels in the raw water could be greatly reduced by clarification prior to entering the water treatment plant. The existing plant is fixed in size and capacity, however a pre-clarification stage will dramatically reduce the load on the current plant.<\/p>\n

A traditional clarifier and upstream floc\/polymer dosing system to handle 1ML\/hr would cost well over USD $1M and take up a considerable land area to install and was therefore not practical in this case. With a very low retention time this type of system would also require very high chemical usage.<\/p>\n

POLYMER OPTIMISATION<\/strong><\/p>\n

A range of polymer samples were supplied during the site visit. Jar testing has been carried out using the range of samples and highlighted a particular polymer most suited to this raw water. A local polymer supply company is able to supply a very similar product in powdered form and at a very reasonable price that would suit the mixing\/batching system mentioned above.<\/p>\n

MEDIA CHANGE-OUT IN RAPID SAND FILTERS<\/strong><\/p>\n

During our visit one of the rapid sand filters was drained for inspection. The sand in the filters has never been changed and is now very hard-packed and is in need of replacement. The filter was filled whilst we were watching and the infiltration rate of the incoming water was very poor with most of the water just flowing across over the top of the sand and down through cracks in the hard packed sand rather than down through it. We proposed to replace the media with DMI65\u00ae filtration media<\/a>.<\/p>\n

The DMI65 will remove the existing and cope with any rise in iron or manganese levels that can be encountered in raw water sources with varying quality. The DMI65 requires a low level of free chlorine (0.2-0.3mg\/L) to activate the media. This is easily achieved as it only requires moving of the existing chlorine dosing point to just prior to the media filters. The chlorine residual will remain and still act as disinfection for the treated water lagoon.<\/p>\n

The DMI65\u00ae also provides the perfect filtration coefficient resulting in excellent mechanical filtration lowering suspended solids and turbidity levels.<\/p>\n

The addition of the DMI media and replacement of the filtration nozzles improved not only the quality of water from the media filters, but also the quantity of water through the filters.<\/p>\n

Sample Results<\/p>\n

\"\"<\/p>\n

With a peak NTU of 1000 and an average inlet TSS of 286 you can see that the outlet of lagoon B has been maintained generally around 80 NTU with an average of 86 NTU.<\/p>\n

OVERALL PLANT OUTPUT<\/strong><\/p>\n

The results from the plant post media filters after the replacement of the old sand media with the new DMI65 media have been consistently excellent.<\/p>\n

The expected results from the media filters after the upgrade were:<\/p>\n