DOUBLE WALL LANCE
A lance 4 for injecting a fuel through a tuyere 3 is a double tube. Pulverized coal is injected through an inner tube 21 of the double wall lance 4. Oxygen is injected through an outer tube 22 of the double wall lance 4. Notches 23 are formed in a injecting front end of the inner tube 21 of the doub...
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| creator | Murao, Akinori Watakabe, Shiro Fujiwara, Daiki |
| description | A lance 4 for injecting a fuel through a tuyere 3 is a double tube. Pulverized coal is injected through an inner tube 21 of the double wall lance 4. Oxygen is injected through an outer tube 22 of the double wall lance 4. Notches 23 are formed in a injecting front end of the inner tube 21 of the double wall lance 4. The concentration of oxygen in a gas composed of a carrier gas for the pulverized coal and a gas injected through the outer tube is 35% by volume or more. Even in an operation using pulverized coal having a volatile matter content of 25 mass% or less at a high pulverized coal ratio of 150 kg/t or more, the combustion temperature can be increased, and consequently CO2 emissions can be reduced. The specific oxygen consumption can be suppressed by decreasing the oxygen concentration to less than 70% by volume. The notches 23 may be circumferentially evenly spaced in the inner tube 21 of the double wall lance 4 and further improve combustion efficiency. |
| format | Patent |
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Oxygen is injected through an outer tube 22 of the double wall lance 4. Notches 23 are formed in a injecting front end of the inner tube 21 of the double wall lance 4. The concentration of oxygen in a gas composed of a carrier gas for the pulverized coal and a gas injected through the outer tube is 35% by volume or more. Even in an operation using pulverized coal having a volatile matter content of 25 mass% or less at a high pulverized coal ratio of 150 kg/t or more, the combustion temperature can be increased, and consequently CO2 emissions can be reduced. The specific oxygen consumption can be suppressed by decreasing the oxygen concentration to less than 70% by volume. The notches 23 may be circumferentially evenly spaced in the inner tube 21 of the double wall lance 4 and further improve combustion efficiency.</description><language>eng ; fre ; ger</language><subject>BLASTING ; CHEMISTRY ; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE ; FURNACES ; HEATING ; KILNS ; LIGHTING ; MANUFACTURE OF IRON OR STEEL ; MECHANICAL ENGINEERING ; METALLURGY ; METALLURGY OF IRON ; OVENS ; RETORTS ; WEAPONS</subject><creationdate>2023</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20231129&DB=EPODOC&CC=EP&NR=4283233A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20231129&DB=EPODOC&CC=EP&NR=4283233A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Murao, Akinori</creatorcontrib><creatorcontrib>Watakabe, Shiro</creatorcontrib><creatorcontrib>Fujiwara, Daiki</creatorcontrib><title>DOUBLE WALL LANCE</title><description>A lance 4 for injecting a fuel through a tuyere 3 is a double tube. Pulverized coal is injected through an inner tube 21 of the double wall lance 4. Oxygen is injected through an outer tube 22 of the double wall lance 4. Notches 23 are formed in a injecting front end of the inner tube 21 of the double wall lance 4. The concentration of oxygen in a gas composed of a carrier gas for the pulverized coal and a gas injected through the outer tube is 35% by volume or more. Even in an operation using pulverized coal having a volatile matter content of 25 mass% or less at a high pulverized coal ratio of 150 kg/t or more, the combustion temperature can be increased, and consequently CO2 emissions can be reduced. The specific oxygen consumption can be suppressed by decreasing the oxygen concentration to less than 70% by volume. The notches 23 may be circumferentially evenly spaced in the inner tube 21 of the double wall lance 4 and further improve combustion efficiency.</description><subject>BLASTING</subject><subject>CHEMISTRY</subject><subject>DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE</subject><subject>FURNACES</subject><subject>HEATING</subject><subject>KILNS</subject><subject>LIGHTING</subject><subject>MANUFACTURE OF IRON OR STEEL</subject><subject>MECHANICAL ENGINEERING</subject><subject>METALLURGY</subject><subject>METALLURGY OF IRON</subject><subject>OVENS</subject><subject>RETORTS</subject><subject>WEAPONS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2023</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZBB08Q918nFVCHf08VHwcfRzduVhYE1LzClO5YXS3AwKbq4hzh66qQX58anFBYnJqXmpJfGuASZGFsZGxsaOhsZEKAEA0Y8dIA</recordid><startdate>20231129</startdate><enddate>20231129</enddate><creator>Murao, Akinori</creator><creator>Watakabe, Shiro</creator><creator>Fujiwara, Daiki</creator><scope>EVB</scope></search><sort><creationdate>20231129</creationdate><title>DOUBLE WALL LANCE</title><author>Murao, Akinori ; Watakabe, Shiro ; Fujiwara, Daiki</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP4283233A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>2023</creationdate><topic>BLASTING</topic><topic>CHEMISTRY</topic><topic>DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE</topic><topic>FURNACES</topic><topic>HEATING</topic><topic>KILNS</topic><topic>LIGHTING</topic><topic>MANUFACTURE OF IRON OR STEEL</topic><topic>MECHANICAL ENGINEERING</topic><topic>METALLURGY</topic><topic>METALLURGY OF IRON</topic><topic>OVENS</topic><topic>RETORTS</topic><topic>WEAPONS</topic><toplevel>online_resources</toplevel><creatorcontrib>Murao, Akinori</creatorcontrib><creatorcontrib>Watakabe, Shiro</creatorcontrib><creatorcontrib>Fujiwara, Daiki</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Murao, Akinori</au><au>Watakabe, Shiro</au><au>Fujiwara, Daiki</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>DOUBLE WALL LANCE</title><date>2023-11-29</date><risdate>2023</risdate><abstract>A lance 4 for injecting a fuel through a tuyere 3 is a double tube. Pulverized coal is injected through an inner tube 21 of the double wall lance 4. Oxygen is injected through an outer tube 22 of the double wall lance 4. Notches 23 are formed in a injecting front end of the inner tube 21 of the double wall lance 4. The concentration of oxygen in a gas composed of a carrier gas for the pulverized coal and a gas injected through the outer tube is 35% by volume or more. Even in an operation using pulverized coal having a volatile matter content of 25 mass% or less at a high pulverized coal ratio of 150 kg/t or more, the combustion temperature can be increased, and consequently CO2 emissions can be reduced. The specific oxygen consumption can be suppressed by decreasing the oxygen concentration to less than 70% by volume. The notches 23 may be circumferentially evenly spaced in the inner tube 21 of the double wall lance 4 and further improve combustion efficiency.</abstract><oa>free_for_read</oa></addata></record> |
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| language | eng ; fre ; ger |
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| subjects | BLASTING CHEMISTRY DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE FURNACES HEATING KILNS LIGHTING MANUFACTURE OF IRON OR STEEL MECHANICAL ENGINEERING METALLURGY METALLURGY OF IRON OVENS RETORTS WEAPONS |
| title | DOUBLE WALL LANCE |
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