CS243938B1 - A method of commissioning an olefin production facility - Google Patents

A method of commissioning an olefin production facility Download PDF

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CS243938B1
CS243938B1 CS844835A CS483584A CS243938B1 CS 243938 B1 CS243938 B1 CS 243938B1 CS 844835 A CS844835 A CS 844835A CS 483584 A CS483584 A CS 483584A CS 243938 B1 CS243938 B1 CS 243938B1
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Czechoslovakia
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pyrolysis
plant
compressor
medium
substitute
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CS844835A
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Czech (cs)
Slovak (sk)
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CS483584A1 (en
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Marian Metke
Jaroslav Klatik
Ivan Kirst
Jan Stefik
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Marian Metke
Jaroslav Klatik
Ivan Kirst
Jan Stefik
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Priority to CS844835A priority Critical patent/CS243938B1/en
Publication of CS483584A1 publication Critical patent/CS483584A1/en
Publication of CS243938B1 publication Critical patent/CS243938B1/en

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  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Vynález sa týká sposobu-uvádzania zariadenia na výrobu olefínov do prevádzky pomocou náhradného média, napr. zemného plynu, dusíku, rafinérskych plynov a pod. v opačnom poradí technologických operácií ako Je tomu doteraz. Uvádzanie zariadenia do prevádzky sa vykonává tak, že sa najskor niamiesto vlastným pracovným médiom (pyroplynom) připraví pomocou náhradného média nízkoteplotně deliace zariadenie na prevádzkové parametre. Potom sa náhradně médium použije pri uvádzaní kompresora do prevádzky a po dosiahnutí prevádzkových parametrov kompresora sa nastreknú pyrolýzne pece a ich produkt, pyroplyn, postupné vytlačí zo zariadenia náhradně médium.The invention relates to a method of putting an olefin production plant into operation using a substitute medium, e.g. natural gas, nitrogen, refinery gases, etc. in the reverse order of technological operations as it has been done so far. The plant is put into operation by first preparing a low-temperature separation plant for operating parameters using a substitute medium instead of its own working medium (pyrogas). Then the substitute medium is used when putting the compressor into operation and after the compressor operating parameters are reached, the pyrolysis furnaces are injected and their product, pyrogas, gradually pushes the substitute medium out of the plant.

Description

Vynález sa týká sposobu-uvádzania zariadenia na výrobu olefínov do prevádzky pomocou náhradného média, napr. zemného plynu, dusíku, rafinérskych plynov a pod. v opaěnoím poradí technologických operácií ako Je tomu doteraz. Uvádzanie zariadenia do prevádzky sa vykonává tak, že sa najskór niamiesto vlastným pracovným médiom (pyroplynom.) připraví pomocou náhradného média nízkoteplotně deliace zariadenie na prevádzkové parametre. Potom sa náhradně médium použije pri uvádzaní kompresora do prevádzky a po dosiahnutí prevádzkových parametrov kompresora sa nastreknú pyrolýzne pece a ich produkt, pyroplyn, postupné vytlačí zo zariadenia náhradně médium. 243938 243938 3BACKGROUND OF THE INVENTION The present invention relates to an apparatus for the production of olefins by means of a substitute medium, e.g. in the order of technological operations as it has been so far. The commissioning of the equipment is carried out by preparing a low-temperature separating device for operating parameters using a replacement medium, rather than using its own working medium (pyroply.). Subsequently, the medium is used alternatively when the compressor is put into operation and pyrolysis furnaces are injected after the compressor's operating parameters have been reached, and their product, pyrrospheric, is successively expelled from the device. 243938 243938 3

Vynález sa týká sposobu uvádzania zariadenia na výrobu olefínov do prevádzký záměnou vlastného pracovného média (pyroplynu) náhradnými médiami, pričom sled technologických operácií (pyrolýza, ko-mpresia, delenie) je ohrátený. V súčasnosti sa uvádzanie zariadenia na výrobu olefínov- do prevádzký -vykonává takým spósobom, že pyrolýzou rafinérskych surovin sa získá pyrolýzny plyn (pyroplyn), ktorý sa po-užíva ako- pracovně médium na náběh kompresora pyroplynu a po dosiahnutí prevádzkových parametrov sa tento plyn expanduje do časti zariadenia na delenie jednotlivých zložiek. Pri expanzii pyroplynu sa využitím Jo-ule-Thomsonovho efektu dosahuje hlboké podchladenie materiálu potřebné ku frakcionácii jednotlivých zložiek. Pri súčasnom spósobe náběhu je pyroplyn využívaný ako nosič tepla, pričom však dochádza k značným materiálovým stratám z toho dovodu, že v počiatočno-m štádiu náběhu nie je ešte zariadenie na technologických parametrech. Nestandardně termodynamické po-dmienky v zariadení neumožňujú dosahovat požadovánu, kvalitu pr-oduktov, čím následné dochádza k ich stratám spalováním na potn-om horáku počas celého náběhu, ktorý trvá aj niekofko dní.BACKGROUND OF THE INVENTION The present invention relates to a process for introducing an olefin production plant by substituting its own working medium (pyrolysis) with substitute media, wherein the sequence of technological operations (pyrolysis, co-compression, separation) is shortened. At present, the introduction of an olefin plant is carried out in such a way that pyrolysis gas is obtained by pyrolysis of the refinery feedstocks (pyrope gas), which is used as a working medium for the start-up of the pyrospheric compressor and is expanded when the operating parameters are reached to the component section of the component separation device. By expanding the pyrolysis, the Jo-ule-Thomson effect achieves a deep undercooling of the material needed to fractionate the individual components. In the current approach, the pyrogas is used as a heat carrier, but there is considerable material loss, with the result that there is no technological parameter at the start-up stage. Non-standard thermodynamic conditions in the device do not allow to achieve the desired quality of the products, which in turn results in combustion losses on the torch during the entire start-up, which lasts several days.

Uvedené nedostatky súčasného spósobu náběhu zariadenia na výrobu olefínov sa oidstránia spósobo-m uvádzania zariadenia do prevádzký, ktorého podstata spočívá v to-m, že sa namiesto vlastného pracovného- média (pyroplynu) použijú na prípra-vu zariadenia na prevádzkové parametre iné vho-dné látky, napr. zemný plyn, vodný plyn, bioplyn, generátorový plyn, ko-ksárenský plyn, rafinérské odpadové plyny, resp. ich zmesi, pričom sa zároveň změní sled technologických operácií a ich poradie je o-brátené, t. j. delenie, kompresia, pyrolýza. 4 Výhodou spos-obu uvádzania zariadenia na výrobu olefínov do prevádzký podfa vynálezu je to, že použitím· náhradného média sa najskor uvedie na prevádzkové parametre deliaca časť, potom časť kompresie pyroplynu a až nakoniec energeticky náročná py-rolýza, ktorá spoitrebúva až 70 % energií výroby. Súčasne dochádza k rýchlemu získavaniu produkto-v polymerizačnej kvality (etylén, pro-pylén) vzhladom k tomu, že pyroplyn vstupuje už do zariadenia, kto-ré je připravené na prevádzkové termodynamické parametre.The aforementioned drawbacks of the present method of starting up the olefin plant are avoided by the process of putting the plant into operation, whereby the other parameters are used instead of the actual working medium (pyropolymer) for the preparation of the plant. substances such as natural gas, water gas, biogas, generator gas, co-cogeneration gas, refinery waste gases, resp. mixtures thereof, while at the same time changing the sequence of the technological operations and their order being omitted, i.e., separation, compression, pyrolysis. The advantage of the method of introducing an olefin plant into operation according to the invention is that, by using a replacement medium, a separating part, then a part of the pyrolysis compression, and ultimately an energy-intensive pyrolysis, which consumes up to 70% of energy, is first introduced to the operating parameters. production. At the same time, the product polymerization quality (ethylene, propylene) is rapidly recovered due to the fact that the pyrosulfene enters the plant which is ready for operational thermodynamic parameters.

Pri náběhu zariadenia na výrobu olefínov do prevádzký sa najskor prieto-k-om dusíka o tlaku 1,9 MPa podchladzo-valo nízkoteplotně zariadenie za chodu chladiacich kompreeo-rov (ety,lénovéh-α -a pro-pylénového), potom sa dusík o tlaku 0,6 MPa privie-dol do odlučovače sania 1. stupňa pyroplyno-vého kompresora, ktorý sa uviedo-1 do ch-odu na 1 000 ot.. min'1. Ďalej sa otáčky kompresora zvýšili na 2 000 ot.min-1 a zároveň sa nastrekla surovina na rafinérsku pec. Po nástreku pyrolýznej pece sa otáčky kompresora zvýšili na spodnú hranicu automatickej rgulácie otáčok a nastrekla sa surovina na ďalšiu pyr-olýznu pec. V tejto fáze uvádzania zariadenia na výrobu olefínov do prevádzký dochádza k po-stupnej náhradě náhradného média vlastným pracovným médiom (pyro-plynom).When the olefin production plant starts up, the low temperature apparatus is first cooled by a flow of nitrogen at a pressure of 1.9 MPa while the cooling additives (ethyl, n-α-α-propylene) are running, then the nitrogen is a pressure of 0.6 MPa is fed to the suction separator of the 1st stage of the pyrospheric compressor, which is brought to 1000 rpm. Furthermore, the speed of the compressor was increased to 2,000 rpm while the raw material was injected into the refinery furnace. After spraying the pyrolysis furnace, the speed of the compressor was increased to the lower limit of the automatic speed control and the feedstock was injected into another pyrolysis furnace. At this stage of putting the olefin plant into operation, the replacement of the replacement medium takes place with its own working medium (pyro-gas).

Po následnom překročení kritických otáčok pyroplynovéh-o kompresora sa dosiaho-1 prevá-dzkový tlak 3,5 MPa na jeho výtlaku a pracovný plyn sa přepustil do časti zariadenia vopred pripravenej náhradným médiom na technologické parametre. Výroba produktov požadovanej kvality podlá tohto postupu sa dosahuje bez zbyto-čných, strát pracovného média (pyroplynu).After the critical speed of the pyros-gas compressor has been exceeded, the discharge pressure of 3.5 MPa is reached at its discharge and the working gas is discharged to a part of the equipment previously prepared by the substitute medium for the technological parameters. The production of the required quality products according to this process is achieved without unnecessary loss of working medium (pyrolyte).

Claims (2)

PREDMETOBJECT 1. Spóso-b uvádzania do prevádzký zariadenia na výrobu olefínov- poz-ostávajúceho z pyrolýznej časti, časti kompresie pyroplynu a z časti delenia· pyrolýznych plynov- vyznačujúci sa tým, že sa najskor naplní časť delenia plynov pomocou náhradného média s výhodou o-bsahujúceho zl-ožky pyrolýzneho plynu, potom sa náhradně médium použije pri uvádzaní pyroplynového kompre- vynalezu so-ra do p-rev-ádzky a po do-siahnutí prevádzkových parametrov tohto kompresora sa nastreknú pyrolýzne pece.1. A method for introducing into operation an apparatus for producing olefin remaining from a pyrolysis section, a portion of a pyrolyse compression and a part of a pyrolysis gas separation, characterized in that a part of the gas separation portion is first filled with a substitute medium preferably containing zinc. pyrolysis gas, then the medium is used alternatively to bring the pyrolysis compressor to the p-stage and pyrolysis furnaces are injected after the operating parameters of the compressor have been reached. 2. Sposob podlá bodu 1, vyznačujúci sa tým, že ako náhradně médium sa použijú s výhodou dusík, vodík, uhlovodíky C( až C6 alebo ich zmesi alebo pyro-plyn z nezávislého zdroja.2. Process according to claim 1, characterized in that nitrogen, hydrogen, C (up to C6 or mixtures thereof or pyro-gas from an independent source) are preferably used as substitute media.
CS844835A 1984-06-25 1984-06-25 A method of commissioning an olefin production facility CS243938B1 (en)

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CS243938B1 true CS243938B1 (en) 1986-07-17

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