Sulphuric acid production from coking desulfurization wastewater in Hongan, Shanxi
ShanxiHongancokingdesulfurizationwasteliquidacidproductionsuccessfullyputintooperation!Thequalifiedrateofproductsreaches100%！
The role of wet electrostatic precipitators for industrial pollution sources
Atpresent,China'sindustrialdevelopmentisgettingfasterandfaster,leadingtoworseningenvironmentalconditions.Atmosphericgovernanceisaverydifficultproblem,andsmogisalsoprominent.Themaincauseofairpollutionisthatindustrialemissionsofpollutantsexceedthestandard.Inordertosolvetheproblemofairpollution,itisnecessarytocontroltheemissionofatmosphericpollutantsfromthesource.Itisalsodifficulttocompletelystoptheoperationofthefactory.Sothereisawetelectrostaticprecipitator.Wetelectrostaticprecipitatorscaneffectivelycontrolindustrialpollutionsources,domesticpollutionsources,variouspowderstoragesites,agriculturalpollutionsources,etc.,mainlytocontroltheemissionofprecursorpollutants.Amongthem,industrialpollutionsourcesarethemostimportant,includingthermalpower,steel,buildingmaterials,chemicals,oilrefining,non-ferrousmetallurgy,variousboilersandkiln,variouswasteincinerationdevices,varioussurfacesprayingdevices.Accordingtotheresearchdatain2005,PM2.5directlydischargedfromcoal-firedpowerplantsaccountsforabout10%ofthenationalPM2.5emissions,plussecondaryparticulatematterproducedbycoal-firedpowerplants.PM2.5emissionsfromcoal-firedpowerplantsaccountforPM2.5ratiowillbeevenhigher.Thewetelectrostaticprecipitatorisahigh-voltageelectrostaticprecipitatorfortreatinghumidgases.Itismainlyusedtoremoveharmfulsubstancessuchasdust,acidmist,waterdroplets,aerosols,odorsandPM2.5inwetgases.Idealforatmosphericdustpollution.Thewetelectrostaticdemisterhasagoodflexuralmodulus,whichcompletelysolvesthedefectsofperishablemetalandnon-twistingelasticityofthemetalsteelpipe.Italsoovercomestheshortageofplastictubeagingandpoorimpactresistance;theFRPcableprotectiontubehasgoodwaterresistance.Itcanbeusedforlong-termuseinwetorwater;FRPcableprotectiontubeisspeciallydesignedtoresisttheerosionofmanychemicalfluidssuchasacid,alkali,salt,untreatedsewage,corrosivesoilandgroundwater.TheeffectofwetelectrostaticprecipitatorinthetreatmentofPM2.5isunanimouslyrecognizedbytheindustry.Theelectricdemistingequipmentalsomeetstherequirementsofultra-lowemissioninprotectingtheenvironment.TheMinistryofEnvironmentalProtectionclearlystatedinthe"TechnicalPolicyforPreventionandControlofEnvironmentalAirFineParticlesPollution(Trial)"(DraftforComment):Encouragethermalpowerenterprisestoadoptnewtechnologiessuchaswetelectrostaticprecipitatortoprevent"gypsumrain"pollutioncausedbydesulfurization.Asanadvancedfluegastreatmenttechnology,electrostaticprecipitatortechnologyhasbeenwidelyusedindevelopedcountriessuchasEuropeandtheUnitedStates,andhasachievedgoodresults.Wetelectrostaticprecipitatorsplayanindispensableroleintheprotectionanddevelopmentoftheenvironment.
Environmental protection emphasizes that wet electrostatic precipitators are widely used
JudgingfromthesourcesofairpollutioninChina,accordingtorelevantresearchbytheMinistryofEnvironmentalProtection,themainsourcesofairpollutioninChinacanbedividedintoproductivepollution,domesticpollutionandtransportationpollution,amongwhichproductionpollutionislarge.Inthecaseofproductivepollution,atmosphericpollutionisalsoseriousinthermalpowerplants,steelplants,petrochemicalplants,andcementplants.Therefore,withtheincreasingemphasisonenvironmentalprotectionbythestateandtheincreasingeffortstocontrolairpollution,webelievethatthedemandfordustremovalequipmentinkeyairpollutionindustrieswillcontinuetoincrease,andbagdustremovalequipmentwillfullybenefitfrommarketdemand.growthof!Fromtheapplicationoftheelectrostaticprecipitator,accordingtothe“2013-2017ChinaDustRemovalEquipmentManufacturingIndustryProductionandSalesDemandandInvestmentForecastAnalysisReport”releasedbytheProspectiveIndustryResearchInstitute,intheUnitedStates,thecurrentbagboilerdustcontrolfieldinthefieldofboilerdustremovalWithashareofmorethan40%,morethan90%ofthelargedry-processcementkilnusesbagfilters;inEurope,bag-typedustcollectorsaccountfornearly50%ofpowerplantboilers;inAustralia,morethan80%ofthermalpowerplantscurrentlyBothusebagdustremoval.InChina,themarketshareofbagfiltersinsteelandnon-ferrousindustrieshasreachedmorethan90%,andthemarketshareinthecementindustryhasreachedmorethan80%.Theslurryflowsathighspeedinthepump,andtheerosionoftheinnersurfaceofthepumpcasingisalsoverylarge.Thewallthicknessofthepumpcasingisoftenthinnedandworn.Whenthepumpcasingisthinned,theslurryreturnflowaftertheworkoftheimpellerincreasescorrespondingly,thetotalamountofslurrycirculationdecreases,thepressureheadnaturallyfailstoreachtheheightitshouldhave,theabsorptioneffectbecomesworse,theoutputcannotreachtheratedvalue,andthedesulfurizationiscaused.Theefficiencycontinuestodecrease,affectingtheefficiencyofthedesulfurizationsystem.Solution:Whentheslurrycirculationimpellerandthepumpcasingareseriouslyworn,thecurrentoftheslurrycirculationpumpisreduced,theoutputisreduced,andthecirculationisreduced.Atthistime,theoperationshouldbestopped,andthepumpimpellerandthepumpcasingarespeciallyprotected.Grinding,whentheanti-wearworkisprocessedandcured,itcanbeputintooperationhere.Whentheimpellerwearsseriously,thenewimpellercanbereplacedaccordingtotheoperationcycle(Fig.3LaichengPowerPlant#3desulfurizationsystemLaichengPowerPlant#3desulfurizationsystemslurrypumpwornimpeller)tomaintainthenormalslurrycirculation.Thedustcontentinthefluegascontinuestoexceedthedesignallowableamount,whichwillgreatlyreducethedesulfurizationrateandgraduallyprecipitatethepluginsidethepipeline.Inaddition,thesootandflyasharealkaline,andwhenitenterstheslurry,thepHoftheslurrywillrise.SincethepHcontrolduringoperationisnolongercalculatedbyCa/S,butonlybypHfeedbackcontrol,theamountoflimestoneslurryisreducedaccordingly,butthedustisnotconsumed,sothefalsepHvalueisincreasedandthedesulfurizationefficiencyisdecreased..
Talking about the working principle of dry and wet electrostatic precipitators
Theworkingprincipleofthewetelectrostaticprecipitatorissimilartothatofthedrytype.Thehigh-voltagecoronadischargechargesthedustorwatermist,andthechargedparticlesreachthedustcollectingplateundertheactionoftheelectricfieldforce,butthedustisremoved.Thedrytypeelectrostaticprecipitatorusesmechanicalrapping,whilethewettypeelectrostaticprecipitatorusestheflushingliquidtorinsetheelectrode,andthedustcapturedonthedustcollectingboardisflushedintotheashhopperanddischarged.Comparedwiththedrydustcollector,thewetelectrostaticprecipitatorhashighdustremovalefficiency,smallpressureloss,simpleoperation,lowenergyconsumption,nomovingparts,nosecondarydust,lowmaintenancecost,shortproductiondowntime,andcanwork.Duetothecompactstructureofthefluegas,itcanbecombinedwithotherfluegastreatmentequipmentanddiversifieddesignformsduetoitscompactstructure.1.Whenthesameenergyconsumptionisused,theefficiencyofthewetdustcollectorishigherthanthatofthedrydustcollector.Thehighenergywetdustcollectorwashesthedustparticlesbelow0.5mm,andthedustremovalefficiencyisstillhigh.2.Thedustremovalefficiencyofthewetdustcollectorisnotonlycomparabletothatofclothbagsandelectrostaticprecipitators,butalsotothedustremovalconditionsthatthesedustcollectorscannot.Thewetdustcollectorhashighexhaustgastreatmentefficiencyforpurifyinghighspecificresistance,highhumidity,hightemperature,flammableandexplosivedust-containinggas.3.Thewetdustremovercanremovethewatervaporandsometoxicandharmfulgaspollutantsinthegaswhileremovingthedustparticlesofthedustygas.Therefore,thewetdustcollectorcanremovedustandtreatthegasasexhaustgas.Disadvantagesofwetscrubbers:1.Thesedimentdischargedfromthewetdustcollectorneedstobetreated.Theclarifiedwashingwatershouldbereusedrepeatedly,otherwiseitwillnotonlycausesecondarypollution,butalsocausewasteofwaterresources.2.Whenpurifyingcorrosivepollution,thewashingwater(orliquid)willhaveacertaindegreeofcorrosiveness.Therefore,thededustingequipmentshouldhavecertainanti-corrosionmeasures.3.Wetdustcollectorsarenotsuitableforthetreatmentoforganicwastegascontainingwater-repellentandhydraulicdust.4.Theapplicationofwetscrubbersincoldareasispronetofreezing,soanti-freezemeasuresshouldbetaken.Thewetdustcollector,alsoknownasthe"waterprecipitator",isadevicethatbringsdustygasintoclosecontactwiththeliquid,andusestheinertialcollisionofwaterdropletsandparticlesandotherfunctionstotraporenlargetheparticles.Thewetscrubbercombinesthetwoformsofwaterbathandspray.First,thesuctionofthehigh-pressurecentrifugalfanisusedtopressthedust-containinggasintoawatertankfilledwithacertainheightofwater,andthewaterbathwilladsorbapartofthedustinthewater.Afterauniformsplit,thegasflowsfrombottomtotop,whilethehighpressuresprayheadsprayswatermistfromtoptobottomtocapturetheremainingdustparticles.Itsfiltrationefficiencycanreachmorethan85%.
What are the methods for automatic pressure regulation of wet electrostatic precipitators?
What is the current status of the purification equipment in China's sulfuric acid plants in recent years?
Themainuseofthesulphuricacidplantpurificationsectionistofilterandselectdust,becausetheuseofbagfiltersisextremelyextensive.WhatisthecurrentstatusofthebagfilterinChinainrecentyears?Infact,thetypeofbagfilterisincomparablymore,andeachdifferenttypehasthisdifferentfunctionandcharacteristics.However,thedemandforbag-typedustcollectorsinChinaislarge,andthedust-removingfiltermaterialisalsocomparable.Good,especiallythelowtemperatureresistantfiberfiltermaterial,hasarelativelybroaddevelopmentprospect,andiswidelyusedthroughoutthemarket.Inthepasttwoyears,undertheplanofthe12thFive-YearPlan,wehaveputforwardarequestforthescopeofconditionalcover,andputforwardahigherrequest,andgas,water,sound,slag,etc.willbeusedbytheforcepointtofilter.Goinginthedata,becausethewholeprocessoffilteringdataandthefutureofstagnationisextremelyoptimistic.However,itisinthemanagementareaoftheentirefluegas,andthesulfuricacidequipmentroastingsection,duetoitshighdustremovalfrequency,focusesonthefactthatitwillnotformasecondarypurification,whichiseasiertorecyclethandrymaterials,becauseitisusedinternationallyinChina.Itstilllosttherelativelybroadimplementation,accountingfor80%oftheentiredustremovalfacility.AsChina'sentirelightindustryisstillrelativelyprosperous,becausemanyvillagesaremovingtowardslightindustrialcities,becauseoftheformationofsignificantairpurification.However,duetotheincreasingdemandforenvironmentalprotection,thedevelopmentofbagfiltersisstillverygood.Theunderstandingofsulfuricacidplantconvertersisnotcomprehensive.Environmentalprotectionequipmentshallalsoincludepowerequipmentfortransportingpollutant-containingfluidsubstances,suchaspumps,fans,conveyors,etc.;andalsoincludemonitoringandcontrolinstrumentationinstrumentsthatensurethenormaloperationofpollutionpreventionfacilities,suchastestinginstruments,pressuregauges,flowmonitoringdevices,etc..Environmentalgovernanceisanurgenttask,andweshouldpaymoreattentiontoenvironmentalprotection.Environmentalprotectionequipmentshouldincludecompletesetsofequipment:suchasairpurifiers,sewagetreatmentequipment,ozonegenerators,industrialoxygengenerators,etc.Equipmentthatcanbeusedtomanagetheenvironmentinindustryorathome.Thedrysuctionsectionofthesulfuricacidequipmentreferstothemechanicalproducts,structuresandsystemsmanufacturedandconstructedbytheproductionunitorthebuildinginstallationunitforcontrollingenvironmentalpollutionandenvironmentallyfriendlyactivatedcarbonintheconversionsectionofthesulfuricacidequipment.Somepeoplethinkthatenvironmentalprotectionequipmentreferstomechanicalprocessingproductsthatcontrolenvironmentalpollution,suchasdustcollectors,weldingsmokepurifiers,singlewatertreatmentequipment,noisecontrollers,etc.
