CS242496B1 - A method of regenerating scrubbing oil in the manufacture of an ethylene and an apparatus for its performance - Google Patents

A method of regenerating scrubbing oil in the manufacture of an ethylene and an apparatus for its performance Download PDF

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CS242496B1
CS242496B1 CS843926A CS392684A CS242496B1 CS 242496 B1 CS242496 B1 CS 242496B1 CS 843926 A CS843926 A CS 843926A CS 392684 A CS392684 A CS 392684A CS 242496 B1 CS242496 B1 CS 242496B1
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oil
gas
inert gas
regenerating
ethylene
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CS843926A
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Czech (cs)
Slovak (sk)
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CS392684A1 (en
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Pavol Skubla
Imrich Nemeth
Jozef Bizmar
Vojtech Klausmann
Walter Waradzin
Eva Kohutova
Frantisek Spacek
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Pavol Skubla
Imrich Nemeth
Jozef Bizmar
Vojtech Klausmann
Walter Waradzin
Eva Kohutova
Frantisek Spacek
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Priority to CS843926A priority Critical patent/CS242496B1/en
Publication of CS392684A1 publication Critical patent/CS392684A1/en
Publication of CS242496B1 publication Critical patent/CS242496B1/en

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Abstract

Regenerácia použitého vypieracieho oleja pri výrobě aeetylénu zo zemného plynu spočívá v odstránení z použitého oleja tých zložiek, ktoré sa z plynu do něho vypierajú najmá však naftalénu a polymerotvorných látok s nenasýtenými vazbami. Dosiahne sa to účinkom tepla a stripovania inertným plynom v nádobě, vybavenej miešadlom a otvormi pre přívod inertného plynu, použitého oleja a odvod inertného plynu spolu s parami naftalénu a prchavých podielov a pre odvod regenerovaného oleja. Polymérotvorné zlúčeniny s nenasýtenými vázbami sa čiastočne vystripujú a čiastočne spolymerizujú a odstraňujú sa z regenerovaného oleja iným spůsobom, například filtráciou.The regeneration of used scrubbing oil in the production of ethylene from natural gas consists in removing from the used oil those components which are washed into it from the gas, in particular naphthalene and polymer-forming substances with unsaturated bonds. This is achieved by the effect of heat and stripping with an inert gas in a vessel equipped with a stirrer and openings for the supply of inert gas, used oil and the discharge of inert gas together with naphthalene vapors and volatile components and for the discharge of the regenerated oil. The polymer-forming compounds with unsaturated bonds are partially stripped and partially polymerized and removed from the regenerated oil by another method, for example by filtration.

Description

Vynález rieši sposob regenerácie použitého vypieracieho oleja pri výrobě acetylénu zo zemného plynu a zariadenie pre uskutočnenie tohoto sposobu.SUMMARY OF THE INVENTION The present invention provides a process for the regeneration of scrubbing oil used in the production of acetylene from natural gas and an apparatus for carrying out this process.

Pri parciálnej oxidácii zemného plynu vzniká štiepny plyn, ktorý obsahuje okrem acetylénu, vodíka, oxidu uholnatého, oxidu uhličitého, metánu, etánu, etylénu, aj určité množstvo aromátov (najma naftalénu), Čs, Ci-acetylénov, olefinov a diolefínov, ako aj množstvo dalších neznámých polymérotvorných zlúčenín s nenasýtenými vazbami.Partial oxidation of natural gas produces fission gas which contains, in addition to acetylene, hydrogen, carbon monoxide, carbon dioxide, methane, ethane, ethylene, also a certain amount of aromatics (especially naphthalene), Cs, C 1-acetylenes, olefins and diolefins, other unknown polymer forming compounds with unsaturated bonds.

Acetylén sa zo štiepneho plynu získává odstraňováním jednotlivých zlúčenín absorpciou v selektívnych rozpúštadlách, a to z neztlačeného, ale najmá z komprimovaného štiepneho plynu.Acetylene is obtained from the cleavage gas by removal of the individual compounds by absorption in selective solvents from unpressurized, but in particular compressed, cleavage gas.

Posledný stupeň vypierania štiepneho plynu před jeho kompresiou prebieha v olejovom absorbéri. Tu sa z plynu pri teplote 25 až 35 °C odstraňujú najma aromáty (predovšetkým naftalén), ale aj rožne polymérotvorné zlúčeniny s nenasýtenými vazbami. Vypieracia schopnost oleja sa udržuje odtahováním časti použitého oleja, ktorý sa nahrádza olejom čerstvým. Použitý olej sa už ďalej nevyužívá na technologické účely, ale sa spaluje.The last stage of scrubbing of the fission gas before compression is in the oil absorber. Here, not only aromatics (especially naphthalene), but also various polymer-forming compounds with unsaturated bonds are removed from the gas at a temperature of 25 to 35 ° C. The scrubbing capacity of the oil is maintained by withdrawing a portion of the used oil which is replaced by fresh oil. The used oil is no longer used for technological purposes but is incinerated.

Vypierací olej má obsahovat minimálně 15 % vyšších aromátov, kvůli dobrej vypieracej schopnosti naftalénu a Iných aromátov a skládá sa zo zložiek, ktorých body varu ležia přibližné v intervale teplůt 180 až 400 °C. Obsah naftalénu v čerstvom oleji sa pohybuje medzi 0,3 až 0,5 %, v použitom oleji 2,2 až 2,6 %. Z porovnania analýz použitého a čerstvého oleja vyplývá, že látky, ktoré sa v oleji zo štiepneho plynu absorbuji! patria k prchavějším podielom v použitom oleji.The scrubbing oil should contain at least 15% higher aromatics due to the good scrubbing properties of naphthalene and other aromas and consists of components whose boiling points are approximately in the temperature range of 180 to 400 ° C. The naphthalene content of the fresh oil is between 0.3 and 0.5%, and the oil used is between 2.2 and 2.6%. A comparison of the used and fresh oil analyzes shows that the substances that are absorbed from the fission gas in the oil! are among the more volatile fractions in the oil used.

Doteraz, nie sú známe postupy regenerácie použitého vypieracieho oleja z výroby acetylénu zo zemného plynu. Tento sa používá ako topný olej a spaluje sa.To date, there are no known processes for the recovery of spent scrubbing oil from the production of acetylene from natural gas. This is used as fuel oil and is combusted.

Nevýhodou doterajšieho postupu je skutočnosť, že spalovanie použitého oleja je nehospodárne a navýše sa štiepny plyn nasycuje parami prchavějších podielov oleja. čo tiež prispieva k zhoršovaniu kvality zleženia štiepneho plynu před vstupom na jeho kompresiu.A disadvantage of the prior art process is that the combustion of the used oil is uneconomical and, moreover, the fission gas is saturated with the more volatile proportions of oil. which also contributes to the deterioration of the quality of the fission gas degradation prior to its compression input.

Tieto nevýhody odstraňuje postup podl'a předloženého vynálezu, pri ktorom sa použitý olej regeneruje stripovaním inertným plynom pri zvýšenej teplote, pričom sa z něho odstraňujú látky, ktoré olej absorboval zo štiepneho plynu, a to hlavně naftalén a uhlovodíky s nenasýtenými vazbami.These disadvantages are overcome by the process of the present invention, wherein the oil used is regenerated by stripping with an inert gas at an elevated temperature, removing substances which have absorbed the oil from the fission gas, in particular naphthalene and unsaturated hydrocarbons.

Zároveň sa odstráni časf. prchavějších podielov oleja, čím sa zníži možnost ich prieniku do štiepneho plynu. Súčasne časť zlúčenín s nenasýtenými vazbami v oleji spolymerizuje a odstráni sa po regenerácii filtráciou alebo iným vhodným sposobom.At the same time, the time is removed. more volatile proportions of oil, thereby reducing the possibility of their penetration into the fission gas. At the same time, some unsaturated compounds in the oil are polymerized and removed after regeneration by filtration or other suitable means.

Vhodné podmienky pre regeneráciu vypieracieho oleja sú: teplota 150 až 200 °C, s výhodou 180 °C, prletok inertného plynu 50 až 150 m3. h“1 na 1 m3 regenerujúceho sa oleja, s výhodou 120 m3 . h_1. m~3 a doba regenerácie 1 až 6 hodin, s výhodou 4 hodiny.Suitable conditions for regenerating the scrubbing oil are: temperature 150 to 200 ° C, preferably 180 ° C, inert gas flow 50 to 150 m 3 . h -1 for 1 m 3 of regenerating oil, preferably 120 m 3 . h _1 . m- 3 and a regeneration time of 1 to 6 hours, preferably 4 hours.

Množstvo odstripovaného podielu nepřevyšuje 8 % a množstvo odfiltrovaného podielu 2 % z celkového množstva regenerujúceho sa oleja. Celkové straty pri regenerácii použitého oleja nie sú vyššie ako 10 % a nahrádzajú sa čerstvým olejom.The amount of stripped portion does not exceed 8% and the amount of filtered portion is 2% of the total amount of regenerating oil. The total recovery of used oil is not more than 10% and is replaced by fresh oil.

Zariadenie na uskutočňovanie sposobu (obr.) pozostáva z válcovitéj nádoby 1, ktorá je vybavená miešadlom 2, pričom v hornej časti nádoby sú otvory pre přívod použitého oleja 3, pre přívod inertného plynu 4, pre odvod inertného plynu spolu s prchavými podielmi použitého oleja 5 a pre odvod regenerovaného oleja 6. Olej v nádobě sa vyhrieva na regeneračnú teplotu vhodným spůsobom, například pomocou duplikátora, hadu a pod.The apparatus (Fig.) Consists of a cylindrical vessel 1 equipped with a stirrer 2, with openings for the used oil inlet 3, an inert gas inlet 4, an inert gas outlet together with the volatile proportions of the used oil 5 in the upper part of the vessel. and for recovering the regenerated oil 6. The oil in the vessel is heated to the regeneration temperature in a suitable manner, for example by means of a duplicator, a snake or the like.

Regenerácia použitého oleja sa může vykonávat vsádzkovým alebo kontinuálnym postupom.The regeneration of the oil used may be carried out in a batch or continuous process.

K výhodám navrhovaného spůsobu patří zníženie spotřeby čerstvého vypieracieho oleja a zníženie jeho prchavosti, čo sa odrazí vo vyššej kvalitě štiepneho plynu.The advantages of the proposed process include a reduction in the consumption of fresh scrubbing oil and a reduction in its volatility, which is reflected in a higher quality of fission gas.

Příklad 1Example 1

Do 1 litrovej sulfonačky vybavenej miešadlom sa čerpadlom dávkuje 150 ml. h-1 použitého oleja. Zádrž oleja v sulfonačke je 600 ml a teplota oleja 180 °C. Súčasne sa pod miešadlo privádza rúrkou dusík o prietoku 20 l.h-1. Dusík nasýtený parami prchavých podielov opúšťa sulfonačku cez kondenzátor, kde sa z něho oddělí 10 ml.150 ml is dosed into a 1 liter sulphonator equipped with a stirrer. h -1 of the oil used. The oil retention in the sulfonator is 600 ml and the oil temperature is 180 ° C. At the same time, a nitrogen flow of 20 lh -1 is fed under the stirrer. Nitrogen saturated with volatile volatiles leaves the sulfonator through a condenser where 10 ml is separated.

. h_1 naftalénovej frakcie. Zo sulfonačky sa odtahuje cez chladič 140 ml. h-1 regenerovaného oleja, z ktorého sa zachytia na filtri 2 g . h-1 polymérnych látok. Použitý olej obsahoval 2,6 % naftalénu, zatial' čo regenerovaný iba 0,3 %. Experimentálně nameraná rozpustnost naftalénu v regenerovanom oleji bola rovnaká ako v oleji čerstvom.. h_1 of the naphthalene fraction. 140 ml of the sulphonator is drawn through a condenser. h -1 of regenerated oil from which 2 g is collected on the filter. h -1 of polymeric substances. The oil used contained 2.6% naphthalene while recovered only 0.3%. The experimentally measured solubility of naphthalene in the recovered oil was the same as in fresh oil.

Claims (2)

242406 PREDMET242406 PREDMET 1. Sposob regenerácie vypieracieho olejapři výrobě acetylénu zo zemného plynu vy-značujúci sa tým, že sa olej stripuje inert-ným plynom o prietoku 50 až 150 m3. ti*1na 1 m3 oleja, pri teplote oleja 150 až 200 °Ca době regenerácie 1 až 6 hodin.A process for regenerating an oil scrubber for the production of acetylene from natural gas, characterized in that the oil is stripped with an inert gas having a flow rate of 50 to 150 m 3. at 1 m 3 of oil, at an oil temperature of 150 to 200 ° C and a recovery time of 1 to 6 hours. 2. Zariadenie na uskutočňovanie sposobupodlá bodu 1 vyznačujúce sa tým, že sa VYNÁLEZU skládá z válcovitéj nádoby (1), vybavenejmiešadlom (2), pričom v hornéj časti ná-doby sú otvory pre přívod (3) použitéhooleja, pre přívod (4) inertného plynu, preodvod (5) inertného plynu spolu s prchavý-mi podielmi použitého oleja a pre odvod (6) regenerovaného oleja. 1 list výkresov2. Apparatus for carrying out the process according to claim 1, characterized in that the invention consists of a cylindrical vessel (1) equipped with an agitator (2), wherein in the upper part there are openings for the inlet (3) of the used oil for the inlet (4) of inert the gas, the inert gas transfer (5) together with the volatile portions of the oil used and the removal (6) of the recovered oil. 1 sheet of drawings
CS843926A 1984-05-25 1984-05-25 A method of regenerating scrubbing oil in the manufacture of an ethylene and an apparatus for its performance CS242496B1 (en)

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