As new coal-fired power plants come online to meet the growing demand for electricity in the United States and around the world, there is an increasing need to clean plant emissions to meet clean air regulations. Special pumps and valves help to efficiently operate these scrubbers and handle the abrasive slurry used in the flue gas desulfurization (>FGD) ilana.

Pẹlu gbogbo awọn ilọsiwaju imọ-ẹrọ ni idagbasoke awọn orisun agbara titun ni ọgọrun ọdun to kọja, ohun kan ti ko yipada pupọ ni igbẹkẹle wa lori awọn epo fosaili, paapaa edu, lati ṣe ina ina. Die e sii ju idaji awọn ina mọnamọna ni Ilu Amẹrika wa lati edu. Ọkan ninu awọn abajade ti ina sisun ni awọn ile-iṣẹ agbara ni itusilẹ ti sulfur dioxide (SO 2) gaasi.

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TL FGD fifa

Pẹlu awọn ohun elo 140 titun ti o ni awọn ohun elo agbara ina ni opo gigun ti epo ni Amẹrika nikan, awọn ifiyesi nipa ipade awọn ilana afẹfẹ ti o mọ nihin ati ni ayika agbaye n ṣe asiwaju ọna fun awọn ile-iṣẹ agbara titun ati ti o wa tẹlẹ - ti o ni ipese pẹlu awọn ọna ṣiṣe "scrubbing" ti ilọsiwaju. SO2 ti yọkuro ni bayi lati gaasi flue nipasẹ awọn ọna oriṣiriṣi ti a mọ ni isọdọtun gaasi flue (FGD). Gẹgẹbi ipinfunni Alaye Agbara, eyiti o pese awọn iṣiro agbara fun ijọba AMẸRIKA, awọn ohun elo ni a nireti lati mu awọn ohun elo FGD wọn pọ si gigawatts 141 ti agbara lati ni ibamu pẹlu awọn ipilẹṣẹ ipinlẹ tabi Federal.

Awọn eto FGD le lo boya gbẹ tabi awọn ilana tutu. Ilana FGD tutu ti o wọpọ julọ nlo ojutu fifọ (nigbagbogbo slurry limestone) lati fa SO2 lati inu ṣiṣan gaasi. Ilana FGD tutu yoo yọ diẹ sii ju 90% ti SO2 ninu gaasi flue ati awọn nkan pataki. Ni iṣesi kẹmika ti o rọrun, okuta alamọ ti o wa ninu slurry ti yipada si sulfite kalisiomu nigbati slurry limestone ṣe idahun pẹlu gaasi flue ninu ohun mimu. Ni ọpọlọpọ awọn ẹya FGD, afẹfẹ ti fẹ sinu ipin kan ti ohun mimu ati ki o oxidizes sulfite kalisiomu si sulfate kalisiomu, eyiti o le jẹ ki o rọrun ni irọrun ati ki o yọ omi kuro lati ṣe drier, ohun elo iduroṣinṣin diẹ sii ti o le sọnu ni awọn ibi-ilẹ tabi ti a le ta bi ọja fun ṣiṣe simenti, gypsum ogiri tabi bi aropo ajile.

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Slurry fifa

Yiyan fifa soke fun FGD

Nitori slurry limestone yii nilo lati gbe daradara nipasẹ ilana ile-iṣẹ eka kan, yiyan awọn ifasoke to tọ ati awọn falifu - pẹlu oju kan si iye owo iye-aye wọn lapapọ ati itọju - ṣe pataki.

Ilana FGD bẹrẹ nigbati ifunni limestone (apata) ti dinku ni iwọn nipa fifun pa ni ọlọ ọlọ kan ati lẹhinna dapọ pẹlu omi ni ojò ipese slurry. Awọn slurry (nipa 90% omi) ti wa ni ki o si fa soke sinu gbigba ojò. Niwọn bi aitasera ti slurry limestone duro lati yipada, awọn ipo mimu le waye, eyiti o le ja si cavitation ati ikuna fifa.

Ojutu fifa aṣoju fun ohun elo yii ni lati fi sori ẹrọ fifa fifa ọkọ ayọkẹlẹ kan lati koju iru awọn ipo wọnyi. Awọn ifasoke irin simenti nilo lati ṣe iṣelọpọ lati koju iṣẹ slurry abrasive ti o nira julọ ati pe a tun ṣe apẹrẹ lati rọrun pupọ lati ṣetọju ati ailewu. Lominu ni si imọ-ẹrọ ti fifa soke jẹ awọn fireemu gbigbe ti o wuwo ati awọn ọpa, awọn apakan ogiri ti o nipọn ati irọrun rọpo awọn ẹya yiya. Lapapọ awọn idiyele iye owo igbesi aye jẹ pataki nigbati o ba n ṣalaye awọn ifasoke fun awọn ipo iṣẹ ṣiṣe to lagbara gẹgẹbi iṣẹ FGD. Awọn ifasoke alloy chromium giga jẹ apẹrẹ nitori pH ibajẹ ti slurry.

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Slurry fifa

The slurry must be pumped from the absorber tank to the top of the spray tower, where it is sprayed downward as a fine mist that reacts with the upward-moving flue gas. Since pumping volumes typically range from 16,000 to 20,000 gallons of slurry per minute with heads between 65 and 110 feet, rubber-lined >slurry bẹtiroli jẹ ojutu fifa soke ti o dara julọ. Lẹẹkansi, lati pade awọn idiyele idiyele iye-aye, awọn ifasoke yẹ ki o wa ni ipese pẹlu awọn olutọpa iwọn ila opin fun awọn iyara iṣẹ kekere ati igbesi aye gigun, ati pẹlu awọn laini rọba ti o rọpo aaye fun itọju iyara. Ninu ile-iṣẹ agbara ina ti o jẹ deede, awọn ifasoke meji si marun yoo ṣee lo ni ile-iṣọ sokiri kọọkan.

Niwọn igba ti a ti gba slurry ni isalẹ ile-iṣọ, awọn ifasoke ila roba ni a nilo lati gbe slurry lọ si awọn tanki ipamọ, awọn adagun iru, awọn ohun elo itọju egbin tabi awọn titẹ àlẹmọ. Ti o da lori iru ilana FGD, awọn awoṣe fifa omiran miiran wa fun idasilẹ slurry, imularada-tẹlẹ-scrubber ati awọn ohun elo sump epo.

If you want to know more information about the best FGD pump, welcome to >pe wa loni tabi beere kan ń.