HANGZHOU NUZHUO TECHNOLOGY GROUP CO.,LTD.

Iyo KDON-32000/19000 air separation unit ndiyo huru inotsigira public engineering unit ye200,000 t/a ethylene glycol project. Iyo inonyanya kupa hydrogen yakasvibirira kune yakamanikidzwa gasification unit, ethylene glycol synthesis unit, sulfur recovery, uye sewage treatment, uye inopa yakakwirira uye yakaderera pressure nitrogen kumayuniti akasiyana-siyana ethylene glycol project yekutanga-up purge uye chisimbiso, uye inopawo unit mweya uye mudziyo mhepo.

China NUZHUO Nitrogen Cryogenic Plant Air Separation Unit N2 Generator System Cryogenic Oxygen Plant Liquid factory and suppliers | Nuzhuo

A.TECHNICAL PROCESS

KDON32000/19000 midziyo yekuparadzanisa mhepo yakagadzirwa uye inogadzirwa neNewdraft, uye inotora chirongwa chekuyerera chirongwa cheyakazara yakaderera-kudzvanywa mamorekuru adsorption kucheneswa, air booster turbine yekuwedzera michina yefiriji, chigadzirwa okisijeni mukati compression, yakaderera-kumanikidza nitrogen kunze compression, uye air booster kutenderera. Iyo yakaderera shongwe inotora yakakwirira-inoshanda sieve ndiro shongwe, uye shongwe yepamusoro inotora yakarongeka kurongedza uye yakazara distillation hydrogen-isina argon kugadzirwa maitiro.

Mhepo yakasvibirira inosvetwa kubva mugomba, uye guruva nehumwe hutsvina hwemuchina zvinobviswa nesefa yemhepo inozvichenesa. Mhepo mushure mesefa inopinda mu centrifugal compressor, uye mushure mekumanikidzwa ne compressor, inopinda mumhepo inotonhora shongwe. Ichiri kutonhora, inogona zvakare kuchenesa tsvina inonyungudika nyore mumvura. Mhepo mushure mekubva pashongwe inotonhorera inopinda mu molecular sieve purifier yekuchinja. Carbon dioxide, acetylene uye mwando mumhepo zvinoshambadzirwa. Iyo molecular sieve purifier inoshandiswa mumamodhi maviri ekuchinja, imwe yacho iri kushanda imwe ichigadzira patsva. Kutenderera kwekushanda kwemunatsi kungangoita maawa masere, uye imwe yekuchenesa inochinjirwa kamwe chete maawa mana, uye otomatiki switching inodzorwa nechirongwa chinogadziriswa.

Mhepo mushure meiyo molecular sieve adsorber yakakamurwa kuita nzizi nhatu: rukova rumwe runotorwa zvakananga kubva kune molecular sieve adsorber semhepo yemidziyo yekuparadzanisa mhepo, rukova rumwe runopinda mune yakaderera-pressure plate-fin heat exchanger, inotonhodzwa nereflux yakasvibiswa ammonia uye ammonia, yobva yapinda murukova ruviri, rukova rwemhepo, rukova rwemhepo runopatsanurwa. danho rekutanga kudzvanywa kwebooster. Imwe nzizi inotorwa zvakananga uye inoshandiswa seye system mudziyo mhepo uye mudziyo mhepo mushure mekuderedzwa mukumanikidzwa, uye imwe rwizi inoramba ichidzvanywa mu booster uye inokamurwa kuita hova mbiri mushure mekumanikidzwa muchikamu chechipiri. Rukova rumwe runotorwa nekutonhodzerwa kusvika pakamuri tembiricha uye rwunoenda kumagumo eturbine expander kuti iwedzere kudzvanywa, uye yobva yatorwa kuburikidza nehigh-pressure heat exchanger yopinda muexpaner yekuwedzera nekushanda. Iyo yakawedzera hunyoro mweya inopinda mugasi-mvura yekuparadzanisa, uye mweya wakaparadzaniswa unopinda mushongwe yepasi. Mhepo yemvura yakabviswa kubva mugasi-mvura yekuparadzanisa inopinda mushongwe yepasi seyemvura yemhepo reflux mvura, uye imwe nzizi inoramba ichitsikirirwa mubooster kusvika padanho rekupedzisira kudzvanywa, yobva yatonhodzwa kusvika kukamuri tembiricha neinotonhorera uye inopinda mu-high-pressure plate-fin heat exchanger yekutsinhana nemhepo okisijeni uye reflux yakasvibiswa nitrogen. Iyi chikamu chepamusoro-soro yemhepo inonyungudutswa mukati Mushure mokunge mhepo yemvura yabviswa kubva pasi pechitsinhanho chekupisa, inopinda mushongwe yepasi mushure mekuputika. Mushure mekunge mhepo yatanga kunyungudutswa mushongwe yepasi, mhepo yakaonda yemvura, mhepo yeokisijeni-yakapfuma yemvura, yakachena mvura nitrogen uye yakakwirira-kuchena ammonia inowanikwa. Mhepo yakaonda yemvura, mweya weokisijeni-yakawanda yemvura uye yakachena mvura nitrogen yakanyungudutswa mune inotonhorera uye inotsikirirwa mushongwe yepamusoro kuti iwedzere kunyungudutswa. Iyo okisijeni yemvura inowanikwa pazasi peshongwe yepamusoro inotsikirirwa nepombi yeokisijeni yemvura uye yobva yapinda mu-high-pressure plate-fin heat exchanger yekudziyazve, yobva yapinda muokisijeni pombi network. Iyo nitrogen yemvura inowanikwa pamusoro peiyo shongwe yepasi inotorwa uye inopinda mumvura yeammonia yekuchengetedza tank. Iyo yakakwirira-kuchena ammonia inowanikwa pamusoro peiyo shongwe yepasi inodzoserwa neiyo yakaderera-kudzvinyirira kupisa exchanger uye inopinda ammonia pipeline network. Iyo yakaderera-kudzvanywa nitrogen yakawanikwa kubva kumusoro kweiyo shongwe inodzoserwa neiyo yakaderera-pressure plate-fin heat exchanger uye yobva yabuda mubhokisi rinotonhora, yobva yadzvanywa kusvika 0.45MPa nenitrogen compressor uye inopinda muammonia pipeline network. Imwe huwandu hwechikamu cheargon chinotorwa kubva pakati peshongwe yepamusoro uye inotumirwa kune isina kuchena xenon tower. Iyo xenon chikamu chinonyungudutswa mune isina kuchena argon tower kuti iwane crude liquid argon, iyo inozotumirwa pakati peyakanatswa argon tower. Mushure mekuita distillation mune yakanatswa argon tower, yakanatswa mvura xenon inowanikwa pazasi peshongwe. Iyo yakasviba gasi yeammonia inoburitswa kubva kumusoro kweiyo shongwe yepamusoro, uye mushure mekupiswa zvakare neinotonhorera, yakaderera-kumanikidza ndiro-fin kupisa exchanger uye yakakwirira-kumanikidza ndiro-fin kupisa kupisa uye kubuda mubhokisi rinotonhora, inokamurwa kuita zvikamu zviviri: chikamu chimwe chinopinda mumhepo inopisa ye molecular sieve purification system senge molecular dirty gasve uye nitrogen inosara gasi remvura. cooling tower. Kana iyo yemvura yekuchengetedza okisijeni system inoda kutangwa, iyo okisijeni yemvura iri mumvura yekuchengetera okisijeni tangi inochinjirwa mukati memvura okisijeni vaporizer kuburikidza nevharuvhu inoronga, uye yopinda mupombi yeokisijeni network mushure mekuwana yakaderera-kudzvanywa okisijeni; kana iyo yemvura nitrogen backup system inoda kutangwa, iyo liquid ammonia iri mumvura nitrogen yekuchengetera tangi inochinjirwa mukati memvura okisijeni vaporizer kuburikidza nevharuvhu inogadzirisa, uye yobva yamanikidzwa neammonia compressor kuti iwane yakakwirira-kudzvanywa nitrogen uye yakaderera-kudzvanywa ammonia, uye wobva wapinda nitrogen pombi network.

B.CONTROL SYSTEM

Zvinoenderana nechiyero uye maitiro emaitiro emidziyo yekuparadzanisa mweya, iyo DCS yakagoverwa control system inogamuchirwa, yakabatanidzwa nekusarudzwa kwepasi rose advanced DCS masisitimu, control valve online analyzers uye zvimwe kuyerwa uye kutonga zvikamu. Mukuwedzera pakukwanisa kupedzisa kushandiswa kwekugadzirisa kwechikwata chekuparadzanisa kwemhepo, inogonawo kuisa mavharuvhu ose ekudzivirira munzvimbo yakachengeteka apo chikwata chinovharwa mutsaona, uye mapombi anowirirana anopinda munharaunda yekuchengetedzwa kwekuchengetedza kuti ave nechokwadi chekuchengetedzwa kwemhepo yekuparadzanisa unit. Mahombe turbine compressor units anoshandisa ITCC control masisitimu (turbine compressor unit integrated control system) kupedzisa iyo unit's overspeed control control, emergency cut-off control uye anti-surge control function, uye inogona kutumira masaini kuDCS control system nenzira yewaya yakaoma uye kutaurirana.

C.Main ekutarisa mapoinzi emhepo yekuparadzanisa unit

Kuongorora kuchena kwechigadzirwa okisijeni uye gasi renitrogen rinosiya yakaderera-kumanikidza kupisa exchanger, kuchena kuongororwa kweyakadzika shongwe yemvura yemhepo, kuongororwa kweyepasi shongwe yakachena yemvura nitrogen, kuchena kuongororwa kwegasi rinobva pashongwe yepamusoro, kuchena kuongororwa kwegasi rinopinda musubcooler, kuchena kuongororwa kweokisijeni yemvura mushongwe yepamusoro, tembiricha mushure me crude condenser reflux yemvura yemhepo inoyerera inoramba ichiyerera kune gas-liquid yemvura inoyerera kune gas-liquid kuyerera kwegasi-mvura inoyerera. tembiricha inoratidza yakasviba nitrogen gasi inosiya yakakwira-kumanikidza kupisa exchanger, kuchena kuongororwa kwemhepo ichipinda yakaderera-kudzvanya kupisa, tembiricha yemhepo ichisiya yakanyanya-kudzvanywa kupisa, tembiricha uye tembiricha musiyano weyakasviba ammonia gasi inosiya kupisa exchanger, gasi kuongororwa pakakwirira tower xenon chikamu chekubvisa chiteshi: zvese izvi ndezvekuunganidza data panguva yekutanga uye yakajairika mashandiro emhepo, iyo inobatsira mhepo yekushanda uye yakajairika mashandiro emhepo. midziyo yekuparadzanisa. Ongororo ye nitrous oxide uye acetylene zvirimo mukutonhodza kukuru, uye kuongororwa kwehunyoro hwemukati mumhepo inosimudzira: kuitira kudzivirira mhepo ine mwando kuti ipinde mudistillation system, zvichikonzera kuomarara uye kuvharika kweyekupisa exchanger chiteshi, inokanganisa kupisa kwekupisa uye kugona, acetylene inoputika mushure mekuunganidza mukutonhora kukuru kunodarika imwe kukosha. Liquid okisijeni pombi shaft chisimbiso gasi kuyerera, kudzvanya kuyerera, yemvura okisijeni pombi inotakura tembiricha yeheater, labyrinth chisimbiso gasi tembiricha, tembiricha yemhepo yemvura mushure mekuwedzera, kuwedzera chisimbiso gasi kudzvanywa, kuyerera, kusiyanisa kuratidzwa kwechiratidzo, mafuta ekuzora, tangi yemafuta uye inotonhorera yekumashure tembiricha, turbine expander yekuwedzera kuguma, booster kupera kwemafuta inlet, kuyerera kwakachengeteka, kuyerera kwese kuyerera, kuyerera kwakachengeteka, kuyerera kwese. turbine expander uye liquid pombi yeokisijeni, uye pakupedzisira kuve nechokwadi chekushanda kwakajairwa kwekuparadzaniswa kwemhepo.

Molecular sieve inodziya huru kudzvanywa, kuyerera kuyerera, molecular sieve mhepo (yakasviba nitrogen) inopinza uye yekubuda tembiricha, kumanikidza chiratidzo, molecular sieve regeneration gasi tembiricha uye kuyerera, kucheneswa system yekupikisa chiratidzo, molecular sieve outlet kumanikidza musiyano chiratidzo, steam inlet tembiricha, kumanikidza chiratidzo alarm, regeneration gasi rekubuda heater H20 tembiricha yekubuda kwemhepo, kuyera sieve yemhepo, conden mhepo inobuda inlet yakaderera tower uye booster flow indication: kuve nechokwadi cheyakajairwa kushandura mashandiro eiyo molecular sieve adsorption system uye kuona kuti iyo CO2 neH20 yemukati yemhepo inopinda mubhokisi inotonhora iri padanho rakaderera. Instrument air pressure indication: kuve nechokwadi chekuti chiridzwa mhepo yekuparadzanisa mhepo uye chiridzwa mhepo inopihwa kune pombi network inosvika 0.6MPa (G) kuve nechokwadi chekushanda kwakajairika kwekugadzirwa.

D. Hunhu hwemhepo yekuparadzanisa unit

1. Maitiro maitiro

Nekuda kweiyo yakakwira okisijeni kudzvanywa kweiyo ethylene glycol purojekiti, iyo KDON32000/19000 mhepo yekuparadzanisa midziyo inotora mhepo inosimudzira kutenderera, yemvura okisijeni yemukati yekutsikirira uye ammonia yekunze compression process, kureva, iyo air booster + liquid oxygen pombi + booster turbine expander inosanganiswa nesangano rinonzwisisika rekunze kwekutsinhanisa okisijeni system kutsiva iyo yekunze compressor. Njodzi dzekuchengetedza dzinokonzerwa nekushandiswa kweokisijeni compressors mune yekunze compression process inoderedzwa. Panguva imwecheteyo, huwandu hukuru hweokisijeni yemvura inoburitswa nekutonhora kukuru inogona kuve nechokwadi chekuti mukana wekuunganidza hydrocarbon mune iyo huru inotonhorera mvura okisijeni inodzikiswa kuti ive nechokwadi chekushanda kwakachengeteka kwemidziyo yekuparadzanisa mweya. Iyo yemukati yekumanikidza maitiro ine yakaderera mari yekudyara uye inonzwisisika gadziriso.

2. Hunhu hwemidziyo yekuparadzanisa mhepo

Iyo yekuzvichenesa yemhepo sefa ine otomatiki control system, iyo inogona otomatiki nguva yekudzokera shure uye inogona kugadzirisa chirongwa zvinoenderana nekukura kwekupokana. Iyo precooling sisitimu inotora yakakwirira-inoshanda uye yakaderera-inopikisa isina kurongeka yekurongedza shongwe, uye mugovani wemvura anotora mutsva, anoshanda uye wepamberi muparadzi, izvo kwete chete kuvimbisa kusangana kwakazara pakati pemvura nemhepo, asi zvakare inovimbisa kupisa kwekuchinjana kuita. Waya mesh demister inogadzikwa pamusoro kuti ive nechokwadi chekuti mweya uri kunze kwemhepo inotonhodza tower hautakure mvura. Iyo molecular sieve adsorption system inotora kureba kutenderera uye kaviri-layer mubhedha kucheneswa. Iyo switching system inotora-isina-isina switching control tekinoroji, uye yakakosha heater heater inoshandiswa kudzivirira kupisa kwemhepo kubva pakudonha kuenda kune yakasviba nitrogen parutivi panguva yekuzvarwa patsva.

Iyo yese maitiro eiyo distillation tower system inotora yepasirese yepamusoro ASPEN uye HYSYS software simulation kuverenga. Iyo yakaderera shongwe inotora yakakwirira-inoshanda sieve ndiro shongwe uye yepamusoro shongwe inotora yakajairwa kurongedza shongwe kuti ive nechokwadi chekudhirowa kwechishandiso uye kuderedza kushandiswa kwesimba.

E.Kukurukurirana pamusoro pemaitiro ekuburutsa uye kutakurwa kwemotokari dzine air-conditioned

1.Mamiriro ezvinhu anofanirwa kusangana asati atanga kupatsanurwa kwemhepo:

Usati watanga, ronga uye nyora hurongwa hwekutanga-up, kusanganisira nzira yekutanga-up uye kubata kwenjodzi yekukurumidzira, nezvimwewo. Zvose zvinoshandiswa panguva yekutanga-up process inofanira kuitwa panzvimbo.

Kuchenesa, kugezesa uye kuyedza kushanda kweiyo mafuta ekuzora system kunopera. Usati watanga pombi yemafuta ekuzora, gasi rekuvharisa rinofanira kuwedzerwa kudzivirira kubuda kwemafuta. Kutanga, iyo yega-inotenderera sefa yemafuta ekuzora tangi inofanira kuitwa. Kana imwe dhigirii yehutsanana yasvikwa, pombi yeoiri inosungirirwa pakutsvaira nekusefa, asi bepa resefa rinowedzerwa risati rapinda mucompressor uye turbine uye rinogara richitsiviwa kuti ive nechokwadi chekuchena kwemafuta achipinda mumidziyo. Iyo yekutsvaira uye kutumirwa kweiyo inotenderera yemvura system, mvura yekuchenesa sisitimu, uye yekudhonza system yekuparadzanisa kwemhepo inopedzwa. Usati waiswa, pombi inokwenenzverwa neokisijeni yekuparadzaniswa kwemhepo inoda kuderedzwa, kunyungudutswa, uye kupfuudzwa, yobva yazadzwa negasi rekuvharira. Mapaipi, muchina, magetsi, uye zviridzwa (kunze kwezviridzwa zvekuongorora uye metering zviridzwa) zvemidziyo yekuparadzanisa mweya yakaiswa uye yakagadziriswa kuti ikwane.

Ese anoshanda mechanic pombi dzemvura, mvura yeokisijeni pombi, mhepo compressors, booster, turbine expanders, nezvimwe zvine mamiriro ekutanga, uye mamwe anofanirwa kuedzwa pamuchina mumwe chete.

Iyo molecular sieve switching system ine mamiriro ekutanga, uye iyo molecular switching chirongwa yakasimbiswa kuti inokwanisa kushanda zvakajairika. Kudziisa nekucheneswa kwepombi yehutsi hwepamusoro-soro kwapera. Iyo yekumira chiridzwa mhepo system yakaiswa mukushandiswa, kuchengetedza chiridzwa mhepo yekumanikidza pamusoro pe 0.6MPa (G).

2.Kuchenesa kwemhepo yekuparadzanisa unit pipelines

Tanga iyo yekuzora mafuta sisitimu uye yekuisa chisimbiso gasi remhepo turbine, mweya compressor uye inotonhorera pombi yemvura. Usati watanga mhepo compressor, vhura vheruvhu yemhepo compressor uye unama iyo mhepo inopinza yemhepo inotonhorera tower nendiro yebofu. Mushure mekunge mhepo compressor yekubuda pombi yacheneswa, iyo yekupopotera yekumanikidza inosvika kune yakatemerwa kupera simba uye pombi yekuchenesa chinangwa inokodzera, batanidza iyo mhepo inotonhorera tower inlet pombi, tanga iyo mhepo inotonhorera system (isati yacheneswa, mhepo inotonhorera shongwe yekurongedza haifanire kuzadzwa; iyo inlet molecular sieve adsorber inlet inopinza), bvisa iyo inonamira chipfuro, bvisa iyo sieve inopinza inopinza, bvisa iyo sieve inopinza simbi, bvisa iyo sieve inopinza. yekuchenesa sisitimu (isati yacheneswa, iyo molecular sieve adsorber adsorbent haifanirwe kuzadzwa; iyo air inlet inotonhora bhokisi inlet flange inofanirwa kubviswa), misa iyo compressor yemhepo kusvika chinangwa chave chakakodzera, zadza mhepo inotonhorera shongwe yekurongedza uye molecular sieve adsorber adsorbent, uye tangazve iyo sefa, steam system, aircool system turbine, aircool system turbine, aircool system turbine. kuzadza, angangoita mavhiki maviri ekushanda kwakajairwa mushure mekuzvarwa patsva, kutonhora, kuwedzera kumanikidza, adsorption, uye kudzikisira kudzvinyirira. Mushure menguva yekudziya, mapaipi emhepo eiyo system mushure meiyo molecular sieve adsorber uye mapaipi emukati eiyo chikamu cheshongwe anogona kupeperetswa. Izvi zvinosanganisira zvekutsinhanisa kupisa kwepamusoro-soro, zvinotsinhanisa-kupisa, zvinosimudzira mhepo, maturbine ekuwedzera, uye midziyo yeshongwe yekuparadzanisa mweya. Chenjerera kudzora kuyerera kwemhepo ichipinda mumolecular sieve yekuchenesa system kudzivirira yakawandisa mamorekuru sieve resistance inokuvadza mubhedha. Asati aridza fractionation shongwe, zvose mhepo pombi kupinda fractionation shongwe inotonhora bhokisi anofanira akashongedzerwa zvenguva Sefa kudzivirira guruva, welding slag uye mamwe tsvina kupinda kupisa exchanger uye kukanganisa kupisa kuchinjanisa mugumisiro. Tanga iyo yekuzora mafuta uye yekuvharisa gasi system usati waridza turbine expander uye liquid pombi yeokisijeni. Yese gasi yekuvharisa mapoinzi emidziyo yekuparadzanisa mhepo, kusanganisira muromo weiyo turbine expander, inofanira kuvharwa.

3. Kutonhora kusina uye kwekupedzisira kutumwa kwemhepo yekuparadzanisa unit

Mapaipi ese ari kunze kwebhokisi rinotonhora anopeperetswa, uye ese mapaipi nemidziyo mubhokisi rinotonhora zvinodziiswa uye zvinopeperetswa kuti zvisangane nemamiriro ekutonhora uye kugadzirira bvunzo yekutonhodza.

Kana kutonhora kweshongwe ye distillation kunotanga, mweya unoburitswa nemhepo compressor haugone kupinda mushongwe yedistillation zvachose. Iyo yakanyanya kudzvanywa mweya inoburitswa mumhepo kuburikidza nevharuvhu yemhepo, nekudaro kuchengetedza mhepo compressor discharge pressure isingachinji. Sezvo tembiricha yechikamu chimwe nechimwe cheshongwe ye distillation ichiderera zvishoma nezvishoma, huwandu hwemhepo inofemerwa huchawedzera zvishoma nezvishoma. Panguva ino, chikamu chegasi reflux mune distillation tower inotumirwa kumvura inotonhorera tower. Kutonhora kunofanirwa kuitwa zvishoma nezvishoma uye zvakaenzana, neavhareji yekutonhodza mwero we1 ~ 2 ℃/h kuve nechokwadi chekushisa chakafanana chechikamu chimwe nechimwe. Munguva yekutonhora, simba rekutonhora rekuwedzera gasi rinofanira kuchengetwa pakakwirira. Kana mhepo iri pamagumo anotonhora eiyo main heat exchanger iri pedyo nekupisa kwe liquefaction, danho rekutonhora rinopera.

Nhanho yekutonhora yebhokisi rinotonhora inochengetwa kwenguva yakati, uye kubuda kwakasiyana-siyana uye zvimwe zvikamu zvisina kupera zvinotariswa uye kugadziriswa. Wobva wamisa muchina nhanho nhanho, tanga kurodha pearl jecha mubhokisi rinotonhora, tanga mhepo yekuparadzanisa michina nhanho nhanho mushure mekurodha, uye pinda zvakare padanho rekutonhora. Ziva kuti kana midziyo yekuparadzanisa mhepo yatangwa, gasi rekuvandudza rema molecular sieve rinoshandisa mweya wakacheneswa nesefa yemamorekuru. Kana midziyo yekuparadzanisa mhepo yatangwa uye paine gasi rekuvandudza rakakwana, nzira yakasviba yekuyerera yeammonia inoshandiswa. Munguva yekutonhora, kutonhora mubhokisi rinotonhora zvishoma nezvishoma kunoderera. Iyo inotonhora bhokisi ammonia yekuzadza system inofanirwa kuvhurwa nenguva kudzivirira kudzvanywa kwakashata mubhokisi rinotonhora. Zvadaro midziyo iri mubhokisi rinotonhora inowedzera kutonhora, mhepo inotanga kunyunguduka, mvura inotanga kuoneka mushongwe yepasi, uye nzira ye distillation yepamusoro nepamusoro shongwe inotanga kusimbiswa. Zvadaro zvishoma nezvishoma gadzirisa mavharuvhu rimwe nerimwe kuita kuti kupatsanurwa kwemhepo kufambe zvakanaka.

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