PL15519B1 - Process for the production of ammonium sulphate from an ammoniacal solution for the purification of gases containing carbonic acid. - Google Patents

Process for the production of ammonium sulphate from an ammoniacal solution for the purification of gases containing carbonic acid. Download PDF

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Publication number
PL15519B1
PL15519B1 PL15519A PL1551929A PL15519B1 PL 15519 B1 PL15519 B1 PL 15519B1 PL 15519 A PL15519 A PL 15519A PL 1551929 A PL1551929 A PL 1551929A PL 15519 B1 PL15519 B1 PL 15519B1
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PL
Poland
Prior art keywords
ammonium sulphate
solution
carbonic acid
ammonium
purification
Prior art date
Application number
PL15519A
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Polish (pl)
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Application filed filed Critical
Publication of PL15519B1 publication Critical patent/PL15519B1/en

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Description

Znane jest stracanie amonjakiem siar¬ czanu amonu, zawartego w roztworze, slu¬ zacym do oczyszczania gazów, przyczem stracanie to odbywa sie bez przerwy i nie¬ zaleznie od pochlaniania przez ten czynnik kwasowych skladników gazu. Po straceniu siarczanu amonu, roztwór amonjakalny zo¬ staje w przyblizeniu zobojetniony zapomo- ca wydzielenia z niego amonjaku, a ten o- statni zostaje natychmiast zuzyty do stra¬ cania swiezych ilosci siarczanu amonu.Roztwór obojetny, odplywajacy z kolumn destylacyjnych, doprowadza sie do urza¬ dzenia, oczyszczajacego gazy i zaopatrzone¬ go w chlodnice. Gazy oczyszczane dostaja sie do tego urzadzenia zmieszane z odpo¬ wiednia iloscia wolnego amonjaku.Wynalazek niniejszy dotyczy stosowa¬ nia tego sposobu do oczyszczania gazów, zawierajacych duze ilosci kwasu weglowe¬ go. Poniewaz w tym przypadku zbedne jest przeprowadzanie zpowrotem amonjaku, po¬ rwanego przez gazy uchodzace z urzadze¬ nia oczyszczajacego, urzadzenie to moze byc zasilane ciecza, nasycona dowolna ilo¬ scia wolnego amonjaku, celem zwiazania calkowitej ilosci kwasu weglowego.Przy tych warunkach zbedne jest zobo¬ jetnianie roztworu amonjakalnego, powsta¬ jacego przy stracaniu siarczanu amonu.Przebieg pracy w urzadzeniu destylacyj- nem, sluzacem do przeprowadzania amo¬ njaku wolnego, zawartego w roztworze, zpowrotem do urzadzenia, w którem siar-czan amonu zostaje stracony, reguluje sie tak, iz zawartosc wolnego amonjaku w roz¬ tworze zmniejsza/sie. Przeprowadza isie to do takiego stopnia, ze po pochlonieciu kwa¬ su weglowego w urzadzeniu, isluzacem do oczyszczania gazów, roztwór ten jest slabo alkaliczny i styka sie z siarczanem wapnia, sluzacem do przemiany weglanu amonu na siarczan amonu.Na rysunku uwidocznione jest schema¬ tycznie urzadzenie, sluzace do przeprowa¬ dzania sposobu niniejszego.Obojetny i chlodny roztwór siarczanu amonu, stezony w przyblizeniu do stanu nasycenia, doprowadza sie do górnej czesci urzadzenia 22, pochlaniajacego amonjak, podczas gdy do dolnej czesci tego urzadze¬ nia doplywa w miejscu 23 wolny amonjak.Otrzymany osad siarczanu amonu zbiera sie w naczyniu istozkowem 24, a amonjakalny roztwór odplywa przewodem 25, przeply¬ wa przez chlodnice 26, dostaje sie do gór¬ nej czesci kolumny destylacyjnej 27, ogrze¬ wanej posrednio para wodma zapomoca we- zownicy 28 i polaczonej ze skraplaczem 29 dla par nasyconych amonjakiem. Amonjak wolny i wydzielony w skraplaczu, powraca do urzadzenia 22, w którem sluzy ponow¬ nie do stracania iz roztworu siarczanu amo¬ nu, podczas gdy woda is-kroplona odplywa zpowrotem do urzadzenia 27.Ogrzewanie posrednie kolumn destyla¬ cyjnych reguluje sie w ten sposób, aby go¬ racy roztwór, odplywajacy z dolnej czesci tego urzadzenia, posiadal pewna alkalicz¬ nosc. Roztwór ten ochladza sie powoli w chlodnicy 26 i w chlodnicy 30 i doplywa nastepnie do górnej czesci urzadzenia 2, pochlaniajacego kwas weglowy i zaopatrzo¬ nego w wezownice chlodnicza 31. Przewo¬ dem / doprowadza sie takie ilosci kwasu weglowego, iz roztwór, odplywajacy prze¬ wodem 6, posiada slaba alkalicznosc. Roz¬ twór ten miesza sie w urzadzeniu 7 z drob¬ no sproszkowanym gipsem, poczem prze¬ plywa przez filtr 8, urzadzenia 9, sliuzaoe do wymiany ciepla, urzadzenie destylacyjne 10 i parownice 19. Roztwór przeplywa na¬ stepnie przez urzadzenie 9 i przewód 32 zpowrotem do urzadzenia 22, w celu powtó¬ rzenia obiegu, podczas gdy amonjak, wy¬ dzielony z urzadzenia 10, dostaje sie do u- rzadzenia 22 przewodem 32.W celu uzupelnienia amonjaku wydzie¬ lonego podczas przebiegu w postaci siarcza¬ nu amonu, mozna doprowadzac do urzadze¬ nia 22 bezposrednio lub przewodem 34 swie- zyNHs. PLIt is known to lose ammonium sulphate contained in a solution for gas purification with ammonium chloride, since this loss takes place without interruption and regardless of the absorption of the acidic components of the gas by this agent. After the ammonium sulphate is lost, the ammoniacal solution becomes approximately neutralized by the separation of ammonia from it, and the latter is immediately used up to lose fresh ammonium sulphate. The inert solution flowing from the distillation columns is fed to the room. A gas cleaner, and equipped with coolers. The gases to be treated enter this apparatus mixed with a suitable amount of free ammonia. The present invention relates to the use of this method to purify gases containing large amounts of carbonic acid. Since in this case it is unnecessary to return the ammonia, broken up by the gases escaping from the purifier, the purifier may be fed with a liquid saturated with any amount of free ammonia in order to bind the total amount of carbonic acid. The desaturation of the ammonium solution formed in the loss of ammonium sulphate is regulated by the distillation apparatus for returning free ammonia contained in the solution to the apparatus where the ammonium sulphate is lost, and the free ammonium content of the solution is reduced. This is done to such an extent that when carbonic acid is absorbed in the device and used for gas purification, this solution is slightly alkaline and comes into contact with calcium sulphate to convert ammonium carbonate to ammonium sulphate. The figure shows the diagram schematically device for carrying out the present process. An inert and cool solution of ammonium sulfate, concentrated approximately to saturation, is fed to the top of the ammonia-absorbing device 22, while free ammonia flows to the bottom of the device at point 23. The resulting ammonium sulphate precipitate is collected in a conical vessel 24, and the ammoniacal solution drains through line 25, flows through coolers 26, reaches the top of the distillation column 27, indirectly heated with steam through tube 28 and connected with condenser 29 for ammonia saturated vapors. As free and separated in the condenser, the ammonia returns to apparatus 22, where it serves again to be lost from the ammonium sulphate solution, while the is-drop water flows back to apparatus 27. The indirect heating of the distillation columns is thus regulated so that the hot solution draining from the bottom of this apparatus has a certain alkalinity. This solution is cooled slowly in the radiator 26 and the radiator 30 and then flows to the upper part of the device 2, which absorbs the carbonic acid and has a cooling coil 31. The line / is fed with such amounts of carbonic acid that the solution is drained through the line 6, has low alkalinity. This solution is mixed in the apparatus 7 with the finely powdered gypsum and then flows through the filter 8, the apparatus 9, for heat exchange, the distillation apparatus 10 and evaporators 19. The solution flows smoothly through apparatus 9 and line 32 back to apparatus 22 to repeat the circulation, while ammonia, separated from apparatus 10, enters apparatus 22 via line 32. In order to replenish the ammonia released during the course in the form of ammonium sulphate, one can to device 22 either directly or via line 34 of fresh NHs. PL

Claims (2)

Zastrzezenia patentowe. 1. Sposób wytwarzania siarczanu amo¬ nu z roztworu amonjakalnego, sluzacego do oczyszczania gazów, które zawieraja w przyblizeniu 100% kwasu weglowego, zna¬ mienny tern, ze siarczan amonu zostaje stracony zapomoca amonjaku oddzielnie od roztworu siarczanu amonu, a z roztworu, otrzymanego po straceniu siarczanu amonu, wydziela sie wolny amonjak do takiego stop¬ nia, iz roztwór siarczanu amonu jest po po¬ chlonieciu kwasu weglowego i zmieszaniu z gipsem, w celu otrzymania siarczanu amo¬ nu, nasycony. Patent claims. 1. A method of producing ammonium sulphate from an ammonium sulfate solution for the purification of gases which contain approximately 100% carbonic acid, meaning that ammonium sulphate is lost by means of ammonia separately from the ammonium sulphate solution, and from the solution obtained after waste ammonium sulphate is released, free ammonium is released to such an extent that the ammonium sulphate solution is saturated after chlorination of carbonic acid and mixed with gypsum to obtain ammonium sulphate. 2. Sposób wedlug zastrz. 1, znamienny tern, ze wolny amonjak, wydzielony z roz¬ tworu amonjakalnego, sluzy do stracania swiezych ilosci siarczanu ajmonli, a roztwór siarczanu, otrzymany po zmieszaniu roz¬ tworu z gipsem, zostaje destylowanyr wzglednie stezony, w celu wydzielenia a- monjaku. Union Chimiaue Belge S o c i e t e A n o o y m e; Zastepca: Inz. H. Sokal, rzecznik patentowy.Do opisu patentowego Nr 15519. Druk L. Boguslawskiego i Ski. Warszawa. PL2. The method according to claim A method according to claim 1, characterized in that the free ammonia separated from the ammoniacal solution is used to lose fresh amounts of ajmonli sulfate, and the sulfate solution obtained after mixing the solution with gypsum is distilled or relatively concentrated in order to separate the a monjack. Union Chimiaue Belge S o c i e t e A n o o o y m e; Deputy: Inz. H. Sokal, patent attorney. To the patent description No. 15519. Print by L. Boguslawski and Ski. Warsaw. PL
PL15519A 1929-02-06 Process for the production of ammonium sulphate from an ammoniacal solution for the purification of gases containing carbonic acid. PL15519B1 (en)

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PL15519B1 true PL15519B1 (en) 1932-02-29

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