Ha lifeme tse ncha tse fehlang motlakase ka mashala li tla inthaneteng ho fihlela tlhoko e ntseng e hola ea motlakase United States le lefats'eng ka bophara, ho na le tlhokahalo e ntseng e eketseha ea ho hloekisa mesi ea limela ho fihlela melao e hloekileng ea moea. Lipompompe tse khethehileng le li-valve li thusa ho sebelisa li-scrubber tsena ka nepo le ho sebetsana le slurry ea abrasive e sebelisoang ho fehla khase ea flue desulfurization (>FGD) ts'ebetso.

Ka tsoelopele eohle ea theknoloji ea ho hlahisa mehloli e mecha ea matla lilemong tse lekholo tse fetileng, ntho e ’ngoe e sa kang ea fetoha hakaalo ke ho itšetleha ha rōna ka libeso, haholo-holo mashala, ho fehla motlakase. Karolo e fetang halofo ea motlakase United States e tsoa mashala. E 'ngoe ea liphello tsa ho chesa mashala ka limela tsa motlakase ke ho lokolloa ha sulphur dioxide (SO 2) khase.

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TL FGD Pompo

Kaha ho na le lifeme tse ncha tse 140 tsa motlakase tse fehloang ka mashala tse ntseng li tsoela pele United States feela, matšoenyeho mabapi le ho kopana le melao e hloekileng ea moea mona le lefatšeng ka bophara e etella pele lifeme tse ncha le tse seng li ntse li le teng tsa motlakase - tse nang le lisebelisoa tse tsoetseng pele tsa "ho hlatsuoa". SO2 e se e tlositsoe khase ea flue ka mekhoa e fapaneng eo hangata e tsejoang ka hore ke flue gas desulfurization (FGD). Ho latela Energy Information Administration, e fanang ka lipalo-palo tsa matla bakeng sa mmuso oa US, lits'ebeletso li lebelletsoe ho eketsa lits'ebeletso tsa bona tsa FGD ho li-gigawatts tse 141 tsa bokhoni ba ho ipapisa le matsapa a mmuso kapa a mmuso.

Litsamaiso tsa FGD li ka sebelisa mekhoa e omileng kapa e metsi. Mokhoa o tloaelehileng oa FGD o nang le metsi o sebelisa tharollo ea ho hohla (hangata ke lejoe la mokoetla) ho monya SO2 ho tsoa khase ea khase. Ts'ebetso ea FGD e metsi e tla tlosa ho feta 90% ea SO2 ka khase ea flue le particulate matter. Ka karabelo e bonolo ea lik'hemik'hale, lejoe la mokoetla le ka har'a slurry le fetoloa ho calcium sulfite ha lejoe la mokoetla le kopana le khase ea flue ka har'a mohatelli. Likarolong tse ngata tsa FGD, moea o fefoloa ka har'a karolo e kenang 'me o oxidize calcium sulfite ho calcium sulfate, eo ka nako eo e ka tlhotliloeng habonolo le ho ntšoa metsi hore e be ntho e omileng, e tsitsitseng haholoanyane e ka lahleloang ka har'a lithōle kapa e ka rekisoang e le sehlahisoa sa ho etsa samente, gypsum wallboard kapa joalo ka tlatsetso ea manyolo.

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Pompo ea Seretse

Khetho ea pompo bakeng sa FGD

Hobane seretse sena sa lejoe la mokoetla se hloka ho tsamaea hantle ka har'a ts'ebetso e rarahaneng ea indasteri, ho bohlokoa ho khetha lipompo le li-valve tse nepahetseng - ka leihlo le shebileng litšenyehelo le tlhokomelo ea tsona - ke habohlokoa.

Ts'ebetso ea FGD e qala ha phepelo ea lejoe la mokoetla (lefika) e fokotsoa ka boholo ka ho e pshatla ka leloala la bolo ebe e tsoakoa le metsi ka tanka ea phepelo ea seretse. The slurry (hoo e ka bang 90% ea metsi) e ntan'o pompeloa ka tanka ea ho monya. Kaha ho tsitsa ha slurry ea mokoetla ho atisa ho fetoha, maemo a ho hula a ka etsahala, a ka lebisang ho cavitation le ho hlōleha ha pompo.

Tharollo e tloaelehileng ea pompo bakeng sa kopo ena ke ho kenya pompo ea carbide slurry ho mamella mefuta ena ea maemo. Lipompompo tsa tšepe tse entsoeng ka samente li hloka ho etsoa ho mamella ts'ebeletso e matla ka ho fetisisa ea abrasive slurry mme hape li etselitsoe ho ba bonolo haholo ho li hlokomela le ho sireletseha. Ntho ea bohlokoa ho boenjiniere ba pompo ke liforeimi le li-shafts tse nang le mosebetsi o boima, likarolo tsa lebota tse teteaneng le likarolo tse ka nkeloang sebaka habonolo. Kakaretso ea litšenyehelo tsa potoloho ea bophelo e bohlokoa ha ho hlakisoa lipompo bakeng sa maemo a thata a ts'ebetso joalo ka ts'ebeletso ea FGD. Lipompo tsa alloy tse phahameng tsa chromium li nepahetse ka lebaka la pH e senyang ea slurry.

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Pompo ea Seretse

Seretse se tlameha ho pompuoa ho tloha tanka e monyang ho ea holimo ho tora ea ho fafatsa, moo se fafatsoang ho ea tlase joalo ka moholi o motle o sebetsanang le khase ea flue e eang holimo. Kaha lipompo tsa ho pompa hangata li tloha ho lilithara tse 16,000 ho isa ho tse 20,000 tsa slurry ka motsotso ka lihlooho tse pakeng tsa 65 le 110 feet, rabara-lined>lipompo tsa slurry ke tharollo e molemohali ea ho pompa. Hape, ho fihlela litlhoko tsa litšenyehelo tsa bophelo, lipompo li lokela ho ba le li-impellers tse bophara bo boholo bakeng sa lebelo le tlase la ts'ebetso le nako e telele ea ho apara, le li-rabara tse ka nkeloang sebaka bakeng sa tlhokomelo e potlakileng. Sebakeng se tloaelehileng sa ho fehla matla a mashala, ho tla sebelisoa lipompo tse peli ho isa ho tse hlano toreng ka 'ngoe ea ho fafatsa.

Kaha slurry e bokelloa botlaaseng ba tora, ho hlokahala lipompo tse eketsehileng tse nang le rabara ho tsamaisa slurry ho litanka tsa polokelo, matangoana a li-tailings, lisebelisoa tsa ho hloekisa litšila kapa mechine ea ho hloekisa. Ho itšetlehile ka mofuta oa ts'ebetso ea FGD, mefuta e meng ea pompo e fumaneha bakeng sa ho ntša slurry, ho hlaphoheloa pele ho scrubber le lisebelisoa tsa oli ea sump.

Haeba u batla ho tseba haholoanyane ka pompo e ntle ka ho fetisisa ea FGD, amohela ho >iteanye le rona kajeno kapa o kopa qotso.