{"id":6236,"date":"2021-01-11T13:37:54","date_gmt":"2021-01-11T11:37:54","guid":{"rendered":"http:\/\/www.mtechnology.com.ua\/?p=6236"},"modified":"2023-02-16T20:22:07","modified_gmt":"2023-02-16T18:22:07","slug":"modernization-of-blast-furnace-air-heaters","status":"publish","type":"post","link":"https:\/\/mtechnology.com.ua\/en\/modernization-of-blast-furnace-air-heaters\/","title":{"rendered":"Modernization of blast-furnace air heaters."},"content":{"rendered":"<section  class='av_textblock_section av-av_textblock-0366cc7376be6c9e82a3e9cc8987b64f '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p>At present time, many iron and steel plants use hot-blast stoves with an internal combustion chamber, the main feature of which is parallel placing of the checkerwork and combustion chamber in the same casing. Besides, these hot-blast stoves use a &#8220;pipe-in-pipe&#8221; burner type, into which BF gas (or\u00a0 a BFG + NG\/ COG mix) and fan combustion air is fed.<\/p>\n<p><!--more--><\/p>\n<p>This solutions has the followig disadvantages.:<\/p>\n<p>&#8211; destruction of the lining between the combustion chamber and the checkerwork chamber that leads to mixing of cold and hot blast and, as a consequence, to a decrease of the blast temperature, as well as to an increase of the CO content in flue gas;<\/p>\n<p>&#8211; the use of a &#8220;pipe-in-pipe&#8221; type\u00a0 burner leads to incomplete combustion of CO, uneven distribution of combustion products over the checkerwork, high-temperature creep of refractory bricks in the area of blast-furnace gas combustion under the load of the combustion chamber lining, etc.<\/p>\n<p>&#8211; checkerwork blocks with channels with a diameter of 40 mm have a significantly smaller heating surface than those used in modern stoves with channel diameters of 30 and 20 mm.<\/p>\n<p>The described disadvantages in the design of the BF stoves are shown below.<\/p>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_image-eb407bd7191771ec6bc9806da45fd8bf\">\n.avia-image-container.av-av_image-eb407bd7191771ec6bc9806da45fd8bf img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-av_image-eb407bd7191771ec6bc9806da45fd8bf .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-av_image-eb407bd7191771ec6bc9806da45fd8bf av-styling- avia_animated_image av-animated-when-visible-95 pop-up avia-align-center  avia-builder-el-1  el_after_av_textblock  el_before_av_textblock '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img fetchpriority=\"high\" class='wp-image-6173 avia-img-lazy-loading-not-6173 avia_image ' src='https:\/\/mtechnology.com.ua\/wp-content\/uploads\/2021\/01\/2vel.jpg' alt='' title='2vel'  height=\"490\" width=\"688\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div>\n<section  class='av_textblock_section av-av_textblock-0366cc7376be6c9e82a3e9cc8987b64f '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p>Nonuniform distribution of velocities in the HBS profile along the axis of the &#8220;pipe-in-pipe&#8221; type burner nozzle.<\/p>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_image-5b2d185523563679bab0997e54c25f72\">\n.avia-image-container.av-av_image-5b2d185523563679bab0997e54c25f72 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-av_image-5b2d185523563679bab0997e54c25f72 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-av_image-5b2d185523563679bab0997e54c25f72 av-styling- avia_animated_image av-animated-when-visible-95 top-to-bottom avia-align-center  avia-builder-el-3  el_after_av_textblock  el_before_av_textblock '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img fetchpriority=\"high\" class='wp-image-6242 avia-img-lazy-loading-not-6242 avia_image ' src='https:\/\/mtechnology.com.ua\/wp-content\/uploads\/2021\/01\/massfr.png' alt='' title='massfr'  height=\"834\" width=\"898\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div>\n<section  class='av_textblock_section av-av_textblock-0366cc7376be6c9e82a3e9cc8987b64f '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p>In its projects M TECHNOLOGY carries out modernization of hot-blast stoves with a minimal change in the existing position (keeping the existing casing, maintenance\u00a0 platforms, valves, etc.).<\/p>\n<p>A ceramic burner is used as a burner arrangement. This solution has the following advantages:<\/p>\n<p>&#8211; a ceramic burner improves mixing of air and gas so that combustion is more complete and calorific capacity is higher;<\/p>\n<p>&#8211; the flame of the ceramic burner has a strictly vertical trajectory and spreads parallel to the walls of the combustion chamber, what excludes the possibility of local overheating caused by the nonuniform temperature of the partition, and prevents it from burning through (short circuit), which significantly increases the HBS resistance and thermal efficiency;<\/p>\n<p>&#8211; the burner operates silently with low gas pressure losses. The flame is well controlled, there is no gas pulsation, and a better heating is provided if compared to &#8220;pipe-in-pipe&#8221; burners.<\/p>\n<p>General view of a ceramic burner:<\/p>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_image-3dd98fbf9d70fdd54e87377faea22744\">\n.avia-image-container.av-av_image-3dd98fbf9d70fdd54e87377faea22744 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-av_image-3dd98fbf9d70fdd54e87377faea22744 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-av_image-3dd98fbf9d70fdd54e87377faea22744 av-styling- av-hover-grow avia_animated_image av-animated-when-visible-95 fade-in avia-align-center  avia-builder-el-5  el_after_av_textblock  el_before_av_textblock '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img fetchpriority=\"high\" class='wp-image-6200 avia-img-lazy-loading-not-6200 avia_image ' src='https:\/\/mtechnology.com.ua\/wp-content\/uploads\/2021\/01\/Keramic.png' alt='' title='Keramic'  height=\"551\" width=\"882\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div>\n<section  class='av_textblock_section av-av_textblock-0366cc7376be6c9e82a3e9cc8987b64f '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p style=\"text-align: left;\">Distribution of velocities along the profile of the HBS chamber with a ceramic burner:<\/p>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_image-09d71453c7d5f4ba23923de27d0e7879\">\n.avia-image-container.av-av_image-09d71453c7d5f4ba23923de27d0e7879 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-av_image-09d71453c7d5f4ba23923de27d0e7879 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-av_image-09d71453c7d5f4ba23923de27d0e7879 av-styling- avia_animated_image av-animated-when-visible-95 av-rotateInUpRight avia-align-center  avia-builder-el-7  el_after_av_textblock  el_before_av_textblock '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img fetchpriority=\"high\" class='wp-image-6204 avia-img-lazy-loading-not-6204 avia_image ' src='https:\/\/mtechnology.com.ua\/wp-content\/uploads\/2021\/01\/2vel.png' alt='' title='2vel'  height=\"778\" width=\"1006\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div>\n<section  class='av_textblock_section av-av_textblock-0366cc7376be6c9e82a3e9cc8987b64f '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p>To increase the heating surface of the checkerwork chamber our company replaces the existing checkerwork blocks with a cylindrical channel diameter of 40 mm with blocks that have conical channel diameters of 30 and 20 mm. These solutions make it possible to increase the heating surface area of the checkerwork by almost two times.<\/p>\n<p>Example of a checkerwork block with a conical channel diameter of 30 mm:<\/p>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_image-8419f30696c5d4325529d4f5fd108dbf\">\n.avia-image-container.av-av_image-8419f30696c5d4325529d4f5fd108dbf img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-av_image-8419f30696c5d4325529d4f5fd108dbf .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-av_image-8419f30696c5d4325529d4f5fd108dbf av-styling- avia_animated_image av-animated-when-visible-95 left-to-right avia-align-center  avia-builder-el-9  el_after_av_textblock  el_before_av_textblock '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img fetchpriority=\"high\" class='wp-image-6208 avia-img-lazy-loading-not-6208 avia_image ' src='https:\/\/mtechnology.com.ua\/wp-content\/uploads\/2021\/01\/nas.png' alt='' title='nas'  height=\"443\" width=\"637\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div>\n<section  class='av_textblock_section av-av_textblock-0366cc7376be6c9e82a3e9cc8987b64f '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p>An Example of efficiency calculation of different types of checkerwork blocks:<\/p>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_image-daf17254c12cff11b4e14bd7837c70b9\">\n.avia-image-container.av-av_image-daf17254c12cff11b4e14bd7837c70b9 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-av_image-daf17254c12cff11b4e14bd7837c70b9 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-av_image-daf17254c12cff11b4e14bd7837c70b9 av-styling- avia_animated_image av-animated-when-visible-95 right-to-left avia-align-center  avia-builder-el-11  el_after_av_textblock  el_before_av_textblock '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img fetchpriority=\"high\" class='wp-image-6212 avia-img-lazy-loading-not-6212 avia_image ' src='https:\/\/mtechnology.com.ua\/wp-content\/uploads\/2021\/01\/nas2.png' alt='' title='nas2'  height=\"446\" width=\"688\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div>\n<section  class='av_textblock_section av-av_textblock-0366cc7376be6c9e82a3e9cc8987b64f '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p>All above-mentioned measures make it possible to maximize the efficiency and lifetime of the existing hot-blast stoves with minimum expenses, as well as to improve the environmental and economic performance of the units.<\/p>\n<p>In addition, our company provides a full range of design services for the reconstruction and new construction of both the entire HBS block and individual stoves, which includes, for example: installation of process equipment, design of process pipelines, utility lines, power supply systems, control systems and instrumentation, civil part. Nowadays we have a number of implemented and put in operation projects.<\/p>\n<p style=\"text-align: center;\">Example of civil structures (process pipeline rack).<\/p>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_image-611814f22e78971071fc3e73e5d652e0\">\n.avia-image-container.av-av_image-611814f22e78971071fc3e73e5d652e0 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-av_image-611814f22e78971071fc3e73e5d652e0 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-av_image-611814f22e78971071fc3e73e5d652e0 av-styling- avia_animated_image av-animated-when-visible-95 left-to-right avia-align-center  avia-builder-el-13  el_after_av_textblock  el_before_av_textblock '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img fetchpriority=\"high\" class='wp-image-6223 avia-img-lazy-loading-not-6223 avia_image ' src='https:\/\/mtechnology.com.ua\/wp-content\/uploads\/2021\/01\/konstruction1.png' alt='' title='konstruction1'  height=\"642\" width=\"571\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div>\n<section  class='av_textblock_section av-av_textblock-0366cc7376be6c9e82a3e9cc8987b64f '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p style=\"text-align: center;\">Example of process equipment installation.<\/p>\n<\/div><\/section>\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div><div id='av-layout-grid-1'  class='av-layout-grid-container av-av_layout_row-fce4c03def77e6a0346b798040c7e77a entry-content-wrapper main_color av-flex-cells  avia-builder-el-15  el_after_av_textblock  avia-builder-el-last  grid-row-not-first  container_wrap fullsize'  >\n<div class='flex_cell av-av_cell_one_half-ebe5280c498a4b568c7730bb0189ca45 av-gridrow-cell av_one_half no_margin  avia-builder-el-16  el_before_av_cell_one_half  avia-builder-el-first '  ><div class='flex_cell_inner'>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_image-528df7529f49961125302fd2b39b3a19\">\n.avia-image-container.av-av_image-528df7529f49961125302fd2b39b3a19 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-av_image-528df7529f49961125302fd2b39b3a19 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-av_image-528df7529f49961125302fd2b39b3a19 av-styling- avia_animated_image av-animated-when-visible-95 left-to-right avia-align-center  avia-builder-el-17  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img fetchpriority=\"high\" class='wp-image-6226 avia-img-lazy-loading-not-6226 avia_image ' src='https:\/\/mtechnology.com.ua\/wp-content\/uploads\/2021\/01\/konstruction2.png' alt='' title='konstruction2'  height=\"641\" width=\"791\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div>\n<\/div><\/div><div class='flex_cell av-av_cell_one_half-ebe5280c498a4b568c7730bb0189ca45 av-gridrow-cell av_one_half no_margin  avia-builder-el-18  el_after_av_cell_one_half  avia-builder-el-last '  ><div class='flex_cell_inner'>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_image-96f03db78e340b477f8fe7012007b93e\">\n.avia-image-container.av-av_image-96f03db78e340b477f8fe7012007b93e img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-av_image-96f03db78e340b477f8fe7012007b93e .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-av_image-96f03db78e340b477f8fe7012007b93e av-styling- avia_animated_image av-animated-when-visible-95 right-to-left avia-align-center  avia-builder-el-19  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img fetchpriority=\"high\" class='wp-image-6229 avia-img-lazy-loading-not-6229 avia_image ' src='https:\/\/mtechnology.com.ua\/wp-content\/uploads\/2021\/01\/konstruction3.png' alt='' title='konstruction3'  height=\"654\" width=\"811\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div>\n<\/div><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>At present time, many iron and steel plants use hot-blast stoves with an internal combustion chamber, the main feature of which is parallel placing of the checkerwork and combustion chamber in the same casing. Besides, these hot-blast stoves use a &#8220;pipe-in-pipe&#8221; burner type, into which BF gas (or\u00a0 a BFG + NG\/ COG mix) and [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":6173,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[],"class_list":["post-6236","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-stati"],"_links":{"self":[{"href":"https:\/\/mtechnology.com.ua\/en\/wp-json\/wp\/v2\/posts\/6236","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mtechnology.com.ua\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mtechnology.com.ua\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mtechnology.com.ua\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/mtechnology.com.ua\/en\/wp-json\/wp\/v2\/comments?post=6236"}],"version-history":[{"count":0,"href":"https:\/\/mtechnology.com.ua\/en\/wp-json\/wp\/v2\/posts\/6236\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mtechnology.com.ua\/en\/wp-json\/wp\/v2\/media\/6173"}],"wp:attachment":[{"href":"https:\/\/mtechnology.com.ua\/en\/wp-json\/wp\/v2\/media?parent=6236"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mtechnology.com.ua\/en\/wp-json\/wp\/v2\/categories?post=6236"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mtechnology.com.ua\/en\/wp-json\/wp\/v2\/tags?post=6236"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}