{"id":6674,"date":"2021-09-30T13:27:21","date_gmt":"2021-09-30T10:27:21","guid":{"rendered":"https:\/\/rusgazcryo.ru\/turboexpanders-for-air-separation-units\/"},"modified":"2025-11-26T08:44:38","modified_gmt":"2025-11-26T05:44:38","slug":"turbodetandery-nizkogo-srednego-vysokogo-davleniya-dlya-vozduhorazdelitelnyh-ustanovok","status":"publish","type":"post","link":"https:\/\/rusgazcryo.ru\/en\/turbodetandery-nizkogo-srednego-vysokogo-davleniya-dlya-vozduhorazdelitelnyh-ustanovok\/","title":{"rendered":"Turboexpanders for Air Separation Units"},"content":{"rendered":"\n<p>To cool gases in the process cycle, expansion machines are used; they are the key equipment for reducing temperature in the technological cycle.<br\/>The operation of a turboexpander is based on expansion of the gas flow with extraction of external mechanical work.<br\/>The design is a centripetal turbine with a radial-axial impeller and a shaft equipped with one of several types of load devices for absorbing the external work: an oil brake, a blower stage, a compressor stage, or an electric generator.<br\/><br\/>In air separation units, a cryogenic cycle is implemented by means of a turboexpander in order to achieve low temperatures and subsequently liquefy the process air before it is fed into the rectification column of the cold box.<\/p>\n\n<h2 class=\"wp-block-heading\">Principle of operation of a turboexpander<\/h2>\n\n<ul class=\"wp-block-list\">\n<li>Initial expansion of the flow occurs in the passages of the nozzle guide vanes, followed by further expansion in the impeller.<br\/>The external work obtained on the expander wheel is transmitted to the unit shaft and then to a braking device, where this work is absorbed; <\/li>\n\n\n\n<li>During expansion of the flow, the working pressure decreases, and, as a result, its temperature is reduced.<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">Features of turboexpanders for ASUs<\/h2>\n\n<ul class=\"wp-block-list\">\n<li>Single-stage or multi-stage expander sections;<\/li>\n\n\n\n<li>Oil hydrodynamic or hydrostatic bearings;<\/li>\n\n\n\n<li>Load device in the form of a compressor stage;<\/li>\n\n\n\n<li>No contamination of the flow path with oil;<\/li>\n\n\n\n<li>Controllable parameters: flow rate and pressure;<\/li>\n\n\n\n<li>Unit power depends on pressure drop and flow rate;<\/li>\n\n\n\n<li>An automated protection system prevents emergency operating modes, including overspeed (\u201crunaway\u201d);<\/li>\n\n\n\n<li>High efficiency of the expander stage, improving the overall technical and economic performance of the ASU.<\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading\">Turboexpander design work includes<\/h3>\n\n<ul class=\"wp-block-list\">\n<li>Thermodynamic calculation of the expander stage characteristics and determination of braking device characteristics;<\/li>\n\n\n\n<li>Determination of actual gas-dynamic parameters;<\/li>\n\n\n\n<li>Optimization of the combined operation of compressor and expander stages;<\/li>\n\n\n\n<li>Optimization of the unit\u2019s flow path.<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">Production<\/h2>\n\n<p>Gas turboexpanders are manufactured at the cryogenic and compressor equipment plant of Hangzhou Oxygen Plant Group.<\/p>\n\n<p><strong>RusGazKrio LLC<\/strong>, which has more than fifteen years of experience working with this Chinese company, offers turboexpanders at manufacturer prices, suitable for:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Air separation, refrigeration and helium units;<\/li>\n\n\n\n<li>Hydrogen liquefiers.<\/li>\n<\/ul>\n\n<p>RusGazKrio successfully cooperates with Hangzhou Oxygen Plant Group, which develops and manufactures equipment for cold generation.<br\/>High-tech production lines and qualified personnel make it possible to solve complex tasks in the production of turboexpander units for liquefaction of air, nitrogen and natural gas over a wide range of operating conditions. <\/p>\n\n<p>We offer installation, commissioning, service maintenance of the supplied equipment and other services as requested by the customer.<\/p>\n\n<p><\/p>\n\n<p><\/p>\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>To cool gases in the process cycle, expansion machines are used; they are the key equipment for reducing temperature in the technological cycle.The operation of a turboexpander is based on expansion of the gas flow with extraction of external mechanical work.The design is a centripetal turbine with a radial-axial impeller and a shaft equipped with<\/p>\n","protected":false},"author":1,"featured_media":6675,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[143],"tags":[],"class_list":["post-6674","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-turbodetandery"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - 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