Method of roasting biomass and control method thereof
The process of heat treatment of lignocellulosic biomass at maximum 300[deg] C under controlled atmosphere in the absence of oxygen, comprises mixing the biomass in a reactor through a hot gas flow, primarily drying the resulting biomass, and roasting the dried biomass (5), where biomass undergoes o...
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| description | The process of heat treatment of lignocellulosic biomass at maximum 300[deg] C under controlled atmosphere in the absence of oxygen, comprises mixing the biomass in a reactor through a hot gas flow, primarily drying the resulting biomass, and roasting the dried biomass (5), where biomass undergoes one or more exothermic transformation reactions. The reactor is provided with a unit for conveying and controlling the forwarding speed v of the biomass through the reactor, a heating unit with gas flow, a unit for collecting steam and gas, and a unit for measuring the pressure in the reactor. The process of heat treatment of lignocellulosic biomass at maximum 300[deg] C under controlled atmosphere in the absence of oxygen, comprises mixing the biomass in a reactor through a hot gas flow, primarily drying the resulting biomass, and roasting the dried biomass, where biomass undergoes one or more exothermic transformation reactions. The reactor is provided with a unit for conveying and controlling the forwarding speed v of the biomass through the reactor, a heating unit with gas flow, a unit for collecting steam and gas, a unit for measuring the pressure in the reactor and the pressure of collected steam and gas, and a unit for measuring and controlling the temperature in the reactor. The forwarding speed v and temperature T of heating gas is adjusted according to recorded temperature to ensure: a separation in the time of steam emissions obtained from the drying of gas and pyrolysis gas obtained from the roasting; and a homogeneous and constant roasting at the end of the process. The roasting takes place in an accurate and reproducible interval at a place of the reactor on the forwarding path of the biomass. The reactor is a rotating furnace, a screw furnace or a multiple hearth furnace comprising a series of N 0floors (1) or circular baking plates (2) laid above one another in a steel envelope (3) lined with insulation, a vertical rotating shaft of rotating speed (omega ) laid along the furnace axis bearing arms (4) equipped with back support for mixing the load and moving through holes through each floor. The biomass is loaded at floor top and moving downwards to form a sturdy bed on each hearth and is heated by a hot gas flow to carry the hearth at a temperature for forced drying and roasting the biomass. The speed of rotation of the shaft and the temperature T of heating gas is controlled during complete roasting of the biomass at the floor N. The complete roa |
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Procédé de traitement thermique d'une charge de biomasse, de préférence lignocellulosique, à 300°C maximum, sous atmosphère contrôlée en défaut d'oxygène, dans lequel la biomasse subit dans un réacteur un brassage et, grâce à un flux de gaz chauds, une première étape de séchage poussé suivie d'une seconde étape de torréfaction, ledit réacteur étant pourvu de moyens de convoyage et de contrôle de la vitesse v d'avancement de la biomasse au travers du réacteur, de moyens de chauffage par flux de gaz, de moyens de prélèvement des vapeurs et gaz, de moyens de mesure de la pression dans le réacteur et de la pression des vapeurs et gaz prélevés, de moyens de mesure et contrôle de la température dans le réacteur, caractérisé en ce que l'on ajuste la vitesse d'avancement v et la température T des gaz de chauffe, dite température de consigne, de manière à assurer :
- une séparation dans le temps des émissions de vapeurs provenant du séchage des gaz et des gaz de pyrolyse provenant de la torréfaction ;
- une torréfaction homogène et constante à la fin du procédé ;
- une torréfaction se déroulant dans un intervalle de temps précis et reproductible et à un endroit précis du réacteur, sur le chemin d'avancement de la charge.</description><language>eng ; fre ; ger</language><subject>ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL ; CHEMISTRY ; DESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FORPRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS ; FIRELIGHTERS ; FUELS ; FUELS NOT OTHERWISE PROVIDED FOR ; LIQUEFIED PETROLEUM GAS ; LUBRICANTS ; METALLURGY ; NATURAL GAS ; PEAT ; PETROLEUM, GAS OR COKE INDUSTRIES ; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K ; TECHNICAL GASES CONTAINING CARBON MONOXIDE</subject><creationdate>2010</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=20100526&DB=EPODOC&CC=EP&NR=2189512A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20100526&DB=EPODOC&CC=EP&NR=2189512A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>LEBOUTTE, DIDIER</creatorcontrib><title>Method of roasting biomass and control method thereof</title><description>The process of heat treatment of lignocellulosic biomass at maximum 300[deg] C under controlled atmosphere in the absence of oxygen, comprises mixing the biomass in a reactor through a hot gas flow, primarily drying the resulting biomass, and roasting the dried biomass (5), where biomass undergoes one or more exothermic transformation reactions. The reactor is provided with a unit for conveying and controlling the forwarding speed v of the biomass through the reactor, a heating unit with gas flow, a unit for collecting steam and gas, and a unit for measuring the pressure in the reactor. The process of heat treatment of lignocellulosic biomass at maximum 300[deg] C under controlled atmosphere in the absence of oxygen, comprises mixing the biomass in a reactor through a hot gas flow, primarily drying the resulting biomass, and roasting the dried biomass, where biomass undergoes one or more exothermic transformation reactions. The reactor is provided with a unit for conveying and controlling the forwarding speed v of the biomass through the reactor, a heating unit with gas flow, a unit for collecting steam and gas, a unit for measuring the pressure in the reactor and the pressure of collected steam and gas, and a unit for measuring and controlling the temperature in the reactor. The forwarding speed v and temperature T of heating gas is adjusted according to recorded temperature to ensure: a separation in the time of steam emissions obtained from the drying of gas and pyrolysis gas obtained from the roasting; and a homogeneous and constant roasting at the end of the process. The roasting takes place in an accurate and reproducible interval at a place of the reactor on the forwarding path of the biomass. The reactor is a rotating furnace, a screw furnace or a multiple hearth furnace comprising a series of N 0floors (1) or circular baking plates (2) laid above one another in a steel envelope (3) lined with insulation, a vertical rotating shaft of rotating speed (omega ) laid along the furnace axis bearing arms (4) equipped with back support for mixing the load and moving through holes through each floor. The biomass is loaded at floor top and moving downwards to form a sturdy bed on each hearth and is heated by a hot gas flow to carry the hearth at a temperature for forced drying and roasting the biomass. The speed of rotation of the shaft and the temperature T of heating gas is controlled during complete roasting of the biomass at the floor N. The complete roasting is characterized by a peak of gas pressure peak for roasting almost entirely confined to the level of N floor. Forced drying of the biomass is carried out by one or more previous N' floors, where the localization of gas and steam for forced drying is determined by the position of the pressure peak corresponding to the process. The furnace comprises 6 floors, in which complete drying is entirely carried out in the floors I to III and the roasting is done in floor IV. The steam and gas for forced drying are extracted at the level of floor N-1. The pyrolysis gas for roasting is extracted at the floor N and used as fuel, and oxidized partially in the floor N. The heating gas temperature and the rotation speed of the shaft of the furnace are controlled by analyzing the composition of gas collected from different floors, and pyrometric measurements at different floors. The feeding in biomass of the multiple hearth furnaces is adjusted continuously to maintain the thickness of the constant stocky bed. A sprayer is installed in floor N and used for cooling the heat treated biomass by water vapor at low temperature to prevent its ignition when it is exposed to the air at the furnace outlet. The sprayers are regulated to obtain 3-4% of water in the biomass, which corresponds to the hygroscopic equilibrium of the roasted wood. The extraction of the treated biomass of the furnace is carried out using a cooled screw of sufficient length to bring the temperature of the heat treated biomass below the ignition point.
Procédé de traitement thermique d'une charge de biomasse, de préférence lignocellulosique, à 300°C maximum, sous atmosphère contrôlée en défaut d'oxygène, dans lequel la biomasse subit dans un réacteur un brassage et, grâce à un flux de gaz chauds, une première étape de séchage poussé suivie d'une seconde étape de torréfaction, ledit réacteur étant pourvu de moyens de convoyage et de contrôle de la vitesse v d'avancement de la biomasse au travers du réacteur, de moyens de chauffage par flux de gaz, de moyens de prélèvement des vapeurs et gaz, de moyens de mesure de la pression dans le réacteur et de la pression des vapeurs et gaz prélevés, de moyens de mesure et contrôle de la température dans le réacteur, caractérisé en ce que l'on ajuste la vitesse d'avancement v et la température T des gaz de chauffe, dite température de consigne, de manière à assurer :
- une séparation dans le temps des émissions de vapeurs provenant du séchage des gaz et des gaz de pyrolyse provenant de la torréfaction ;
- une torréfaction homogène et constante à la fin du procédé ;
- une torréfaction se déroulant dans un intervalle de temps précis et reproductible et à un endroit précis du réacteur, sur le chemin d'avancement de la charge.</description><subject>ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL</subject><subject>CHEMISTRY</subject><subject>DESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FORPRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS</subject><subject>FIRELIGHTERS</subject><subject>FUELS</subject><subject>FUELS NOT OTHERWISE PROVIDED FOR</subject><subject>LIQUEFIED PETROLEUM GAS</subject><subject>LUBRICANTS</subject><subject>METALLURGY</subject><subject>NATURAL GAS</subject><subject>PEAT</subject><subject>PETROLEUM, GAS OR COKE INDUSTRIES</subject><subject>SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K</subject><subject>TECHNICAL GASES CONTAINING CARBON MONOXIDE</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2010</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZDD1TS3JyE9RyE9TKMpPLC7JzEtXSMrMz00sLlZIzEtRSM7PKynKz1HIhSgryUgtSs1P42FgTUvMKU7lhdLcDApuriHOHrqpBfnxqcUFicmpeakl8a4BRoYWlqaGRo6GxkQoAQAMbCzJ</recordid><startdate>20100526</startdate><enddate>20100526</enddate><creator>LEBOUTTE, DIDIER</creator><scope>EVB</scope></search><sort><creationdate>20100526</creationdate><title>Method of roasting biomass and control method thereof</title><author>LEBOUTTE, DIDIER</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP2189512A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>2010</creationdate><topic>ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL</topic><topic>CHEMISTRY</topic><topic>DESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FORPRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS</topic><topic>FIRELIGHTERS</topic><topic>FUELS</topic><topic>FUELS NOT OTHERWISE PROVIDED FOR</topic><topic>LIQUEFIED PETROLEUM GAS</topic><topic>LUBRICANTS</topic><topic>METALLURGY</topic><topic>NATURAL GAS</topic><topic>PEAT</topic><topic>PETROLEUM, GAS OR COKE INDUSTRIES</topic><topic>SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K</topic><topic>TECHNICAL GASES CONTAINING CARBON MONOXIDE</topic><toplevel>online_resources</toplevel><creatorcontrib>LEBOUTTE, DIDIER</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>LEBOUTTE, DIDIER</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Method of roasting biomass and control method thereof</title><date>2010-05-26</date><risdate>2010</risdate><abstract>The process of heat treatment of lignocellulosic biomass at maximum 300[deg] C under controlled atmosphere in the absence of oxygen, comprises mixing the biomass in a reactor through a hot gas flow, primarily drying the resulting biomass, and roasting the dried biomass (5), where biomass undergoes one or more exothermic transformation reactions. The reactor is provided with a unit for conveying and controlling the forwarding speed v of the biomass through the reactor, a heating unit with gas flow, a unit for collecting steam and gas, and a unit for measuring the pressure in the reactor. The process of heat treatment of lignocellulosic biomass at maximum 300[deg] C under controlled atmosphere in the absence of oxygen, comprises mixing the biomass in a reactor through a hot gas flow, primarily drying the resulting biomass, and roasting the dried biomass, where biomass undergoes one or more exothermic transformation reactions. The reactor is provided with a unit for conveying and controlling the forwarding speed v of the biomass through the reactor, a heating unit with gas flow, a unit for collecting steam and gas, a unit for measuring the pressure in the reactor and the pressure of collected steam and gas, and a unit for measuring and controlling the temperature in the reactor. The forwarding speed v and temperature T of heating gas is adjusted according to recorded temperature to ensure: a separation in the time of steam emissions obtained from the drying of gas and pyrolysis gas obtained from the roasting; and a homogeneous and constant roasting at the end of the process. The roasting takes place in an accurate and reproducible interval at a place of the reactor on the forwarding path of the biomass. The reactor is a rotating furnace, a screw furnace or a multiple hearth furnace comprising a series of N 0floors (1) or circular baking plates (2) laid above one another in a steel envelope (3) lined with insulation, a vertical rotating shaft of rotating speed (omega ) laid along the furnace axis bearing arms (4) equipped with back support for mixing the load and moving through holes through each floor. The biomass is loaded at floor top and moving downwards to form a sturdy bed on each hearth and is heated by a hot gas flow to carry the hearth at a temperature for forced drying and roasting the biomass. The speed of rotation of the shaft and the temperature T of heating gas is controlled during complete roasting of the biomass at the floor N. The complete roasting is characterized by a peak of gas pressure peak for roasting almost entirely confined to the level of N floor. Forced drying of the biomass is carried out by one or more previous N' floors, where the localization of gas and steam for forced drying is determined by the position of the pressure peak corresponding to the process. The furnace comprises 6 floors, in which complete drying is entirely carried out in the floors I to III and the roasting is done in floor IV. The steam and gas for forced drying are extracted at the level of floor N-1. The pyrolysis gas for roasting is extracted at the floor N and used as fuel, and oxidized partially in the floor N. The heating gas temperature and the rotation speed of the shaft of the furnace are controlled by analyzing the composition of gas collected from different floors, and pyrometric measurements at different floors. The feeding in biomass of the multiple hearth furnaces is adjusted continuously to maintain the thickness of the constant stocky bed. A sprayer is installed in floor N and used for cooling the heat treated biomass by water vapor at low temperature to prevent its ignition when it is exposed to the air at the furnace outlet. The sprayers are regulated to obtain 3-4% of water in the biomass, which corresponds to the hygroscopic equilibrium of the roasted wood. The extraction of the treated biomass of the furnace is carried out using a cooled screw of sufficient length to bring the temperature of the heat treated biomass below the ignition point.
Procédé de traitement thermique d'une charge de biomasse, de préférence lignocellulosique, à 300°C maximum, sous atmosphère contrôlée en défaut d'oxygène, dans lequel la biomasse subit dans un réacteur un brassage et, grâce à un flux de gaz chauds, une première étape de séchage poussé suivie d'une seconde étape de torréfaction, ledit réacteur étant pourvu de moyens de convoyage et de contrôle de la vitesse v d'avancement de la biomasse au travers du réacteur, de moyens de chauffage par flux de gaz, de moyens de prélèvement des vapeurs et gaz, de moyens de mesure de la pression dans le réacteur et de la pression des vapeurs et gaz prélevés, de moyens de mesure et contrôle de la température dans le réacteur, caractérisé en ce que l'on ajuste la vitesse d'avancement v et la température T des gaz de chauffe, dite température de consigne, de manière à assurer :
- une séparation dans le temps des émissions de vapeurs provenant du séchage des gaz et des gaz de pyrolyse provenant de la torréfaction ;
- une torréfaction homogène et constante à la fin du procédé ;
- une torréfaction se déroulant dans un intervalle de temps précis et reproductible et à un endroit précis du réacteur, sur le chemin d'avancement de la charge.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL CHEMISTRY DESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FORPRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS FIRELIGHTERS FUELS FUELS NOT OTHERWISE PROVIDED FOR LIQUEFIED PETROLEUM GAS LUBRICANTS METALLURGY NATURAL GAS PEAT PETROLEUM, GAS OR COKE INDUSTRIES SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K TECHNICAL GASES CONTAINING CARBON MONOXIDE |
| title | Method of roasting biomass and control method thereof |
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