CS237415B1 - Method of thermal content regenerative recovery from the weak solutions - Google Patents

Description

1

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KaoópeTeHHe othochtch to cnocotfy onTHuanBHoro pereHepa-ΤΗΒΗΟΓΟ KCn0JlI30BaHHH ΤβΠηΟΟΟΑβρΒβΗΗΗ ρβ3 <ί8ΒΛβΗΙΙΗΧ paCTBOpOBejih 37Μπφ-προ ^ κτθΒ NPA Aecoptiuaa patíoweli CPE AU HJIH NPA TEP-unqecKOu pa3AeneHaa, ocedeHHO npsi aÓcoptínaoHHux ana Aecoptim-ohhhx npoueccax c you steam paOoqero BemecTBa GNN xonoAuniHOftΤδΧΗΗΚΗ B COptiUHOHHHX ΤβΠΧΟΒΗΧ HaCOCaX ΑΠΗ ΟΰΟΓρβΒβΤβΒΒβΟΚt8Xhhhh and KOHAauaoHepoB, and raos b npoueccax npoasBOACTBasHepraa ab aHepreiawecxou xoNniCTBe nnn acnosB3OBauaa otxo-AH ^ ero Tenna.

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OdmenpaHHToe pereHepaiHBHoe acnonB3OBaHae TennocoAep-x; AHHH ropawero paatiaBneHHoro pacTBOpa, odpa3yioaierocH NPA TEP-MwwecKOň Aecopduaa padoqero BemecTBa, Hanpauep · R3 abjxkom-ποηθητηοΜ cueca b HRXHeí) qacTH secopóepa npoacxoAHT tinaroAapaotiueHy Tenna c tionee xojioahuií KOHueHTpapoBaHHuu pacTBopou.lípa T3K0M rennoodMeHe norepinephrine Tenna Teu Chun &amp; cie, qeu ÓonBine pa3-Hwua weKAy KOHueHTpauaflua pasÓaBneHHoro and KOHueHTpaposaHHoropacTsopOB. Ho Tax κεκ oóumho ctpsmhtch k Towy, «itoču pa3-hoctb ue ^ Ay KOHueHTpauaHMH paetiaBnenHoro and KOHueHTpapoBaHHoropacTBopaMH thionionBinoíi, to stot odmenpaHHTuň ιιβτοΑ aueeT pHAHeztociaTKOB. 3th ΟβΑΟοτβτκη yBenaMHBaioTCH eme Teii, mto xonoA- 237415 - 2 -

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Enaronapn "peqapKyhfnian pacTBopa", 3Η3μβτ. dnaronapanepexony Tenna ot ropaqero paatABHeHHoro pacTBopa κ cueca, co-Topyio HyxHO οτηβηπτΒ, b cbmom necopdepe, to θοτβ β κοη, ΟΗΗβ $ oppeKTHŤHKaTOpa, bo3mokho yjiytjuieHHe dea τογο. MTOda npa qtomnpon3oi> uio CMeniHBaHne yeacny pasóaBJíeHHUM pacTBopou pa3nena-euoíí cuecLio. Enaronapa "peqapKynaqaa pacTBopa" b cauou necop-Depe uoxho ycTpaHUTB hsúutok Tenna npenBapaTenBHoe acnapeHaeb KOHueHTpnpoBaHHOu pacTBope. 3to TeopeTHqeCKH Heocnopauoe npeauymecTBO "peqapKynaqaapacTBopa" He Hanin οληβκο npaKTaqecKoro πρπΜβΗβΗΒΗ, Tax KaK3τοτ npHHUHn MOxeT daTB ocymecTBneH tobbko npaweHHTenBHO κodopynoB3HHK) c Tpyóaua, HaBHTtiMH cnapaneodpasHO. HaneacHOCTBTaKoň cacTeMH Tpyd HeynosneTBopHTenBHa, τβκ κβκ uana npoasBO-nnTe.iBHOcTB npa ax B3roTOBneHaa. ynenBHaa ποβθρχηοοτβ and B03-mokhocth peuoHTa. Ohb npaMeHHnacB nosTOMy τοηΒκο b BepxHen od-nacia odorpeBa necopdepa and no cax nop padoTana τοηΒκο c He-3Ha <JHTeJIBHb! M ΤβρΜΟΑΒΗΒΜΒ’ίβΟΚΗΜ 3φφβΚΤ0Μ. 237415-3 - oÓecneqeHHH ηημμθηβιιιηχ ποτερΒ AaBJíeuMH w ocyme-CTBJíeHHH npMHmina npOTHBOTOKa B $ A3E OpOliieHHH CTpeMHTCfl KonpeaejiQHHOMy πλθηοηηομϊ οότβκβΗΗΐο, κοτοροβ iiphmghhmo mKOHCTpyímKK aecopóepa KOJioHHopyCÍ b (, Π that H3saHne 23, CTpamma 244). Sth kojiohhu Tpyč paÓoTaioT c Bep-THKaJiBHhiMH nywKaMH Tpyó, b κοτορκχ pa33eAHeMaH ctieci creKaeib BHS6 ΠΗ6ΗΚΜ, and odorpeB npoH3BO7WTCH wepe3 MejxTpyóHoe npo-CTpaHCTBO Kosyxa. B cjiy ^ ae 3arpH3H6HH0ii otforpeBaioineil cpe-Sbi yxe ee nponycKaioT qepe3 Tpycti. O ^ Hano peajiH3amiH peuHpKy-JIHIÍHH paCTBOpa HéyJIOBJíeΤΒ0ρΗΤΘΛΒΗ3 · C OflHOfo CTOpOHbl, Hoe-MeKTpyd npocTpaHCTBO noAodHOň ceKawH oCorpeBa nweeT ομθηβ <5ojib uioři o6b8m-b it BpeMH K8K κοΛΗΜβοτΒΟ ποτοκβ pa3daBJieH'ňoropacTsopa, cTeKaiomsro b Btue πλθηκμ and H0x: H0ň Yacth kojiohhm, oqenB He3HawTeJieH. CO BU ο CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO flo flo flo flo flo flo flo flo flo flo flo flo BblCOKOft CKOpOCTM ΗβοΟΧΟΑΗΜΟ CJIOKHOerexHHqeCKoe peuieane.

CneAywiiJ ΗθΑΟοτβτοκ coctoht b tom, ητο ceKiin odorpeBaAJin flocToeHHa HncxoaHinero njisHoqHoro οτβκβΗΗΗ pa3AejifleMOi5cuecH, aoohu 6μτβ pacnoAOKeHbí Apyr HaA ApyroM. Sto πρηβοαητ, c oahoU CTopOHH, κ HeaíeJiaTeJihHOMy ποβμιιιθηηιο MHcna ceKUHf o oo-rpeBa m, c Apyroí; Op MS, op op op op op op op op op op op op op op op op op op op op pe pe pe pe pe pe pe pe pe pe 49 49 49 49 49 49 49 49 49 49 3το πρηβοαητTaKse κ orpaHineHHio oxnaHCAeHHH TsruiOHOCHTejifi η to HeaejiasMHMÓojibiiihm pa3H0CTHM TeMnepaTyp MeaAy pa3ČaBJieHHbiM pacTBopou npacTEopoM, KOTopuíi HyaHO pa3aeJiHTB Ha "ropjmelí" CTOpOHe CEK-uhh oóorpeBai ecjiH peunpKyjiamra pacTBopa BtinoxHeHa b bhao CA Moro BepxHero peracipa. H3-3a 3THX TpyAHOCTeií H Μ3-3 $ HH3KOŽS CTeneHH 0Če3raíKH-BaHHH (pa3JiHqwe b KOHueHTpauHH weaay pa3BaBJieHHLiM η κοηηθητ-ρκροΒΗΗΗΜΜ paciBopoM) npaKTH ^ ecKH οτκη3μβ3Κ) BO Bcex cAywa- hx ot penKpKyjiHUHH pacTBopa.

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UenB H3O0peTeHHH '- £ 38ΜβΗΗΤ H3BeCTHbIÍ5 H AO CHX ΠΟρ Ηβ ΒΠΟΑΉβ BcnojiB3yeMMft cnocod peuHpKyjiHUHw pacTBopa aah pereHe- paTMBHoro ηοποα £ 3ΟΒ3Ηηη TenJiocoflepacaHHH pasOaBjíeHHoro pacTBopa 237415-4 - aecopdepa NPN npoueccax copdUHH Ha 3φφοκτΗΐ> ΗΐιΗ h peajiw3yeMi> iflcnocoó, npwwcii paaóaBJíeHHufl pacTBop, T.E. 3yMn $ -npoxyKT se-copdepa oxnaxAaeica b uiispoKOti TennepaTyphoi odjiacin djiaroflapanpesoTBpameHHB nepeoxjiaafleHHH KOHueHTpHpoBaHHoro pacTBopacoaaaeTCH npeanocujiKa AJiH dojiee οοβηογο oxjiaoeHHH OTpado-τβηηογο TennOHOCHTejiH. OAHOBpeueHHO goat yueHLuiHTL · 3aTpaTH Ten ji and Ha ocyme-CTBJíeHne peuHpKyjiHUHH h οτκ83ητβοη ot npuMeHeHHH KOHueHTpa-UhohhoD koje OH h ti suji yBejiHweHHH KOHueHipauHH napa napos pado-qefi cpeaw.

H3JI0 «eHfle C.VU1HQCTH H30dpeTeHHH B ocHOBy H3otfpeTeHWH noJioxeHa TexHHqecKaH 3aaana pa3- 'padOTaTB cnocod, β kotopom ncnojiB3yeTCH Tenjio, codupaioinerocnb Hohen qacin Tiecopdepa ropnqero pa3daBJieHHoro pacTBopa PA tíoqefi cpsjíu &amp; cqei προτκΒοτοκβ ERO and no OTHOuieHHE) κ tjacTHHHOuynoTOKy KOHueHTpnpoBaHHoro. oCe3raKHBaeuoro pacTBopa bhs caizo-ro Aecoptíepa, npHqeu paeóaBJíHHbift pacTBop oxjiaoaeTcn, and pa-Úonee cpeacTBO, T.e. aerKwe κομποηθητη flecopdupyeTCH QAC-n3 ^ τη ηογο noTOKa KOHueHTpnpoBaHHoro pacTBopa h dJiaroaapa noa-ΓΟΗΚβ pacxoaa waCTunHoro ποτοκβ nojiyqa »TCH He3HaqiiTejiBHuepa3HHm> i TeunepaTyp uexjjy odorpeBaiomell cpeaofi h BunapuBaHHeMpacTBopa, dJiaroaaps qeMy ποτβριι NPW neper Tenjia qacTnq κ-Houyu ňOTOKy μηηημθιϊβηη. ΟοοτΒβτοτΒβΗΗΟ w30ÓpeTeHHB 3TA Baaawa peuiaeTc &amp; ^ TEU woποτοκ KOHueHTpHpoBaHHoro pacTBopa, noflaBaeworo to TepimecKoepaaaeJieHHe, PA3 ^ ejiHeTCn Ha SBA ποτοκβ, oíhh H3 κοτορυχ-night naer SJ.oóorpeBaeMuii ol nociopoHHero ηοτομημκη Tenjia secopdep and BTopoís - b aecopdep qacTHHHoro noTOKa, odorpeBaeMbiň 3acqeT tojibko pereHepHpyeworo Tenjia hjih 3a cqeT pereHepnpyeuoroTenjia η ot ηοτοπηηκπ ποοτοροΗΗβΓο Tenjia. Π κ om om OH OH OH OH OH OH OH OH OH a a a a a a a a a a a a a a a a a,,,,,,,,,,,,,,,,,,,,. HacTHHHae ποτοκη KOHueHTpnpoBaHHoro pacTBopaHanpabjihídtch napaJiJieJiBHO to opouieHHé odorpeBaeuoro OT-night pofaero ηοτο ^ ηηκο Tenjia KOxyxoTpydHoro aecopdepa h Koxyxo-Tpydaoro jxeooptíepa qacTHqHoro ποτοκβ, odorpesaeMoro tojibko8a cqeT pereHepnpyeuoro Tenjia hjih 3a cqeT pereHepHpyeuoroTenJia η Tena rpm nocTopoHHero ηοτομηηκη h codiapaioTCH β βηλθ237415 - 5 - ja3ÓaBjieHHoro paCTBOpa b ηκρκηθΙΙ ^ acm aecopdepa οοοτεετοτΒδΗ-ho aecopdepa HacTHHHoro ποτοκβ. 3aTeM ppe ηβοτημηειχ ποτοκβBHOBL OÓBeaWHHIOTCH M OČIMlH ΠΟΤΟΚ pa3ČaBJieHH0IO paCTBOpa no-TiaeTCfl b KayecTBe pereHepaTHBHoro TenaoHOCHTean b uesTpyd-Hoe npocTpaacTBO pereHepamEHO odorpeBaeMoro supplied by a different "and κ Tpyd bπροτΗΒοτοκβ qacTwqHOMy noTOKy KOHneHTpnpoBaHHoro paciBopa. Πο οληowy IIS BapnaHTOB EbinojiHeHWfl cnocoda JMA rapaHro 0ΛΜΗ3Κ0Β0ί5 Kohei ^ HOij TeMnepaTypH secopóepa h oanHaKOEOÍi KOH líeHTpauHM pa3daBJieHHoro paciBopa, βηχολη ^ ογο u3 aecopdepaasecopóepa ηηοτμηηογο ποτοκο, opoiaaioiuMft ποτοκ b aecopdepeyacTnyHoro ποτοκβ of oil-ero KOHqa aonoaHHTeaiHO nponyCKaeT-chloro qepe3 nodopoHHe odorpeBaeuníl HarpeBaiejiBHbií! nysoK. npK?,; ep BfcinojiHeHMH -

Eonee noapodHO H3odpeTeHne ποηοηηθτοη Ha npwHspax qcy-necTBJieHHH. 3t M3jiaraioTCfl OTseJiBHtie CTaw cnocoda cΠ O MB 10 ΠρΗΗΙξΗΠΗΘΠΒΗΟίί ΟΧθΜΜ yCTaHOBOK.

Ha Φηγ. I - noKa3aHa ycTaHOBKa coraacHO π3ο6ρβτβΗΗΐο c aecop-cepow c KOHueHTpauHOHHoiJ KOJiOHHOft h ae $ JierwaTO-pOM, c napaoeaBHO-noflKJiioqeHHEM, bspthkwibho pac-ΠΟΛΟΧδΗΗΗΜ SeCOptíepOt! ΊβΟΤΗΊΗΟΓΟ ΠΟΤΟΚβ. ΟΧρβ3Λθ “jisHHeM KOHi | eHrpHpoBaHHoro paciBopa dnaroflapn pery-JMpOBaHHW.

Ha φΗΓ. 2 - noKaaaHa ycTaHOBKa coraacHO ΗβοόρβτβΗΗΐο. noaodHanφΗΓ. I HO C Γ0ρΗ30ΗΤ3ΗΒΗΗΜΜ IiyMKaMH 000ΓρβΒ3Τ6ΛΒ-Htrx Tpyd ληη nocTopoHHe-odorpeBaeuoro íecopdepa HC pa3aeJieHHeM doraToro paciBopa no pa3jnwňHu versa AH nonepeqHoro ceqeHHH, npnyeu BCE Maccood-ueHHue saeMOHTbi pacnoaoxeHH b odmefl ρβκτΗφΗκαΐίΗ-OHHOÍ! KOJIOHHe.

Ha φιΐΓ. 3 - noKa3aHa yciaHOBKa coraacHO Η3ο0ρβτβΗΗΐο. noAodHaaφΗΓ. We C Π Π we Π Π Π Π Π Π Π Π Π Π Π Π Π Π Π ac yr yr yr yr yr yr yr yr ico ico pa ico ico ico ico ico ico ico ico ico ico ico ico. 237415 6

OtforpeBaeMaH yacTB gecopdepa X uoxer duTB BunoniieHaKaK BepTHKaJiBHoU, TaK h ropnaoiiTanBuotb Πρη stou otíorpeuaeuancpega. b the cnyqae, ecnn she MO »CET duTB sarpHSHeHHOíl» προ-xogni Ήβρβ.3 Tpyóu odorpeBaeMoro ny ^ 4th OdmensBeCTHO, ijtoHedonBinyjo pasHOCTB Teuneparyp weacgy odéaraHeHHtiM κοΗΐιθΗτρη-poBaHHuu pacTBOpOM (12) h odorpeBae &amp; ioii cpegoň nerwe peann30-B8TB πρκ ΗΟΠΟ3ΙΒ3ΟΒaHHW XΠηΟΗΟΟΜΤβηββ, He IlUiOíHHX CKpblTOÍSTenJiOTH πρη προτΗΒΟΤΟκβ ropnwero TennoHOciiTena, Hanpoep, bBepTMKaaBHHX gecopdepax I (φηΓ.Ι). B cjiyqae ropnaoHTanBHLix oÓorpeBaeuux nyquax 4 κοτορκβlaae npnueHHiOTca npn ncnonB3OBaHnn TennoHocnTeneíi DE3 οκρκ-TOfl TenJIOTLÍ, ΠρΠΗίΧΗΠ npOTHBOTOKa BbinOJlHMM npHÓJlMGHHO TOJ2LKOdnarogapa BbicoKOuy nncjiy odorpeBaeMux nyuKOB 4 (φκΓ.2). íecopdep wacrnyHoro ποτοκθ padoraei Taos dea οκρκτοη, τεπποτΗ odorpeBa '. Πρκ stou Tanze uoaei ηοποπεηοβθτβοη Ββρτη- »KanBHo ropn3OHTanBHo pacnonoTCHne. Πρη stou npegnoqTeHnecnegyeT OTgaTB βθρτηκηπβηο pacnonoaceHHUM gecopdepaM wacmyHoroΠΟΤΟΚΗ, NOCKOJIBKy B HHX Jierqe OCymeCTBHTB ΠρΗΗΙίΗΠ ΠρΟΤΗΒΟΤΟΚΘΗ »upoue Toro, OTCyTCTByeT onacnocTB 3arpa3HeHHH. Ecnn b kh-qecTBe nocopηH noc nocTTopOHOHOHOHOHOHOH sa sa sa sa sa sa sa sa sa sa sa sa sa sa sa sa sa sa sa sa sa sa sa sa sa sa sa sa sa sa sa CT CT CT CT CT CT CT CT CT CT CT. Πρκ stou cnegyeT gasneHnenapa odorpeBa TaK pacnonooTB CTyneHHun, HTOdu b hhkhhx nyy ~ ksx odorpeBa oho duno sum, qeM b BepxHHX (φηΓ.3). Πρηηιχηπ padoTu cornacao cnocody on ycTaHOBKax, onncaa-hhx Ha φιΐΓ. 1-3. cnegy minii:

KoHneHTpnpoBaHHHfi paciBop (12) pa3gejiaeTGfi do not read (14) aa gsa ποτοκθ, ognH to HanpaBnneTCH b gecopdep I.a Βτοροΰ - b napannenBHO BKJiioqeHHter! gecopdep nacinqHoro ποτο-κθ 2. Pa3geneHne nponcxogm οοοτΒβτοτΒβΗΗΟ TennocogepKaHiwdegnoro pacTBopa. codnpaiouierocH b hohhx aacinx gecopdepa I ngecopdepa ίβοτη ^ ηογο ποτοκθ he ayMn ^ -npogyKTa n no uepe He-3HaynTejiBHKX her οκοηομηπθοκη onpaBgaHHux pa3H0CTnx TeunepaTypue &amp; gy oóiunu ποτοκομ paadaBneHHoro pacTBopa IIb KaneciBe cpeguodorpeBa GNN nywKa HarpeBa 7 gecopdepa ηθοτηηηογο Noton 2 nKOJinqec ^ and wacrnyHoro Hykho gera3npoBaTBs danaHca Tenna. nočně 3Toro κοΗρβΗτρηροΒβΗΗΕΐβ pacTBop 12nepea pacnpegennTenBHoe ycTpoiiCTEO 5 nocTynaeT b KonoHHy ge-copdepa I h gecopdep qacTOHoro ποτοκθ 2. 237415 - 7 -

PA3 £ ejieHne κοΗΐίβΗτρκροκαΗΗΟΓΟ pacTBopa ποτοκη 12 Ha, b nocTynawinne aecopdep IH aecopdep μηοτημηογο ποτοκα 2, MO-χβτ προΗΟΧΟΛΗΤΒ h nocne pa3fleneHHH b nonepeqHOM ceqeHHií κο-βοηηη, night npoxooeHHH qepe3 ycipofiCTBO 2uih MaccootíMeHa 6 (φΗΓ.2 3 H).

KoHneHTpupoBáHHuří pacTBop CTeKaeT b BHse πβθηκη qepe3ycTpoňciBO λπη MaccoodtíeHa 6 H 4 B nyqoK HarpeBa Ascopdepe I cooTseTCTEeHHO qepe3 yCTpoftCTBO / UIH MaccooÓMeHa nyqoKHarpeBa 6 h 7 h 8 hjim 7 b aecopdepe ίθοτημηογο ποτοκβ second Πρπ 3τοιζTspt,: nqecKM OTsejiHioTCH jieroe κοΜΠΟΗβΗΤΗ (flera3auHH hjih ae -copduHfl). PA3 (5aBJieHHbifl pacTBop, codupaioinwflCH b hhxhhx wacTHXsecopdepa IH Becopdepa qacTHqHoro ποτοκθ second οόΒβΛΜΗΗδτοπ, πρκ xejiaHHH b cóopHHice pacTBopa 22 h HenocpeflGTEeHHO nocneπροχοΛΜ b KaqecTBe CPE / u odorpeBa qepe3 nyqoK odorpeBa 7 FLE-copdepa uadOHoro noTOKa 2 b προτηβοτοκ κ no opocwTeaBHOtóy -τοκγ CLtecH, KOTopyB Hyxno pa32ejiHTB h npn one hundred meters oxnaxAaeTcn.nocne Stora ρ8308βτι6ηηβιΑ pacTBop II yxoflHT H3 ycTpo CTga ^ fle-COpÓUHH. yaaJieHHtie κοιζποηθητη προχοηπτ Taoe b προτΗΕΟτοκβ kcuecH, KOTopyio HyxHO PA3, ziejiHTB him b HenocpencTBeHHOu -Also Koh c Hen CCH3 BBepx qepe3 necopdep I h necopdep qacmqHO noTOKa ro-2, one hundred meters HacmnaioT NPA b ycTpoflCTBe OH MaccoodMeHa 6 npOXOXfllUHÍl KOHIíeHTpHpOBaHHblří paCTBOp 12 npHqeU ΚΟΗΙξβΗΤρβΙίΗΗnapa padoqero cpencTaa he nerKoJi φρβκρΗΗ B03paciaeT b HanpaB-JieHHH CCH3 BBepx. 3aBHQHM0CTH b OT ΚΟΗΙίβΗΤρβΙΙΗΗ ΠΟΑΒΟΒΗΜΟΓΟ KOHnsHTpupoBaHHoro pacTBopa 12 on TpedyeMofi hhctoth napapadouero cpescTBa 13 Heodxoma KOHueHTpanHOHHan 3BMine npHTOKa κοηιχθητρηροβηηηγγ pacTBopa 12. B ycraHOBKax, H3odpaxeHHHX Ha $ ηγ. 1-3, npenycMOTpeHasTa HeodxoíHMOTB h b KaqecTBe peuHpKyjiHUHOHHoro reHepaTopanoxa3aH oxβφπβΓκβτορ 17 c 15 φ φ λ ox ox ox ox ox ň.

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Claims (3)

23741512 of the present invention A method for recovering the heat content produced in the form of a collecting product of dilute thermal desorption solutions or distillation with slight loss of regenerative heat transfer, obtaining a low boiling agent as the main fraction and a concentrated solution of the concentrated solution as the main fraction, and the diluted solution being significantly different in concentration characterized in that the progressive heat distribution of the concentrated solution (12) is divided into two streams, one of which proceeds heated up from the side heat source of the desorber (1), and the other - into the heated by regenerated heat or recovered heat and heat from a partial flow desorber of the partial flow desorber, wherein dividing the amount of enriched solution (12) into two partial streams is carried out depending on the useful heat content of the total amount of dilute solution (11) and consumption of the heat in the desorber (1) heated from the side source of heat, and that in the desorber (1) the heating bundle (4) or one or more heating bundles (7, 8) are irrigated by partial streams of the concentrated solution, then, in the form of a dilute solution, a desorber (1) or a partial stream desorber (2) is collected in the lower portions of the desorber (1), and the combined dilute stream (11) is passed through the blanket desorber bundle heating space (7) as a regenerative heating medium countercurrent to a partial stream of concentrated solution. 2. Process according to claim 1, characterized in that, in order to ensure the same final temperature of the desorption and the same concentration of the diluted solution coming from the desorber (1) and the desorber of the partial stream (2), the stream is irrigated by the hot end in the partial stream desorber (2) is additionally passed through an indirectly heated heating bundle (8). Recognized by the invention on the basis of the results of the expert review by the Patent Inventory Office, Berlin, DD. 3 drawings