Transformer oil which is used in high-power transformers with voltage over 110kV, must be pre-cleaned and dehydrated. \u00a0For these tasks, adsorption method is commonly used. It is based on the use of special substances (sorbents) to absorb moisture. \u00a0Sorbents can be either natural (natural deposits) or artificial (produced commercially).<\/p>\n
Zeolite crystals have a highly developed porous surface, thus ensuring greater moisture content (18-20%). \u00a0In case when moisture concentration is low and temperature is increased, the moisture capacity of zeolites is several times greater than other sorbents (activated alumina, silica gel, etc.).<\/p>\n
NaN-mark zeolites are most often used for effective drying of transformer insulation liquid. \u00a0Their pore size is close to the pore size of CaA-mark zeolites. \u00a0The latter, however, absorb water slightly worse, due to the adsorption of other useful low molecular compounds. \u00a0Zeolites of NaX and CaX marks are not recommended for solving problems of transformer oil drying, as they also absorb ionol.<\/p>\n
The basis of a zeolite unit is parallel set cylinders containing zeolite. \u00a0They have filters installed at their input and output. \u00a0Moreover, zeolite units typically include oil pumps and oil heaters. \u00a0Productivity of this oil purifier depends of transformer oil volume, used by specific enterprises or oil facilities.<\/p>\n
Use of zeolites is preceded by their heating to 400-450 \u00b0C. \u00a0Heating is repeated after sorbents get filled with moisture. \u00a0In the process of drying, heated dry air is forced to adsorbers from top to bottom. \u00a0This prevents overheating of zeolites by a combustible part of transformer oil, thus retaining their structure.<\/p>\n
To start drying waste zeolite, it is necessary to drain as much oil from the cylinder as possible. \u00a0The sorbent is then purged with cool air. \u00a0Fresh zeolites are usually dried for 8-9 hours, and oil-soaked zeolites – for 10-12 hours.<\/p>\n
After completion of drying process, adsorbers are cooled and filled with dry transformer oil, which is pumped to remove dust.<\/p>\n
Often, installation organizations and energy companies use natural zeolites instead of artificial. \u00a0Generally \u00a0they are obtained from rock formations by means of crushing and bringing them up to fractions of 8 mm. \u00a0Restoration of natural sorbent is carried out using the same algorithm as for the artificial zeolite drying.<\/p>\n","protected":false},"excerpt":{"rendered":"
Transformer oil which is used in high-power transformers with voltage over 110kV, must be pre-cleaned and dehydrated. \u00a0For these tasks, adsorption method is commonly used. It is based on the use of special substances (sorbents) to absorb moisture. \u00a0Sorbents can be either natural (natural deposits) or artificial (produced commercially). Zeolite crystals have a highly developedRead More <\/a><\/p>\n","protected":false},"author":7,"featured_media":739,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-738","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"acf":[],"language":"en","_links":{"self":[{"href":"https:\/\/oilfiltration.globecore.com\/en\/wp-json\/wp\/v2\/posts\/738","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oilfiltration.globecore.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/oilfiltration.globecore.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/oilfiltration.globecore.com\/en\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/oilfiltration.globecore.com\/en\/wp-json\/wp\/v2\/comments?post=738"}],"version-history":[{"count":0,"href":"https:\/\/oilfiltration.globecore.com\/en\/wp-json\/wp\/v2\/posts\/738\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oilfiltration.globecore.com\/en\/wp-json\/wp\/v2\/media\/739"}],"wp:attachment":[{"href":"https:\/\/oilfiltration.globecore.com\/en\/wp-json\/wp\/v2\/media?parent=738"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/oilfiltration.globecore.com\/en\/wp-json\/wp\/v2\/categories?post=738"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/oilfiltration.globecore.com\/en\/wp-json\/wp\/v2\/tags?post=738"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}