The present invention relates to a method to produce feed bodies, which are capable of providing free flowing granules and/or powder suitable for firing in an industrial furnace at one or multiple burners, the method comprising the following steps: (i) providing waste material comprising one or more thermoplastic material(s) of more than 40%, based on the total dry weight of the waste and one or more cellulosic material(s) of more than 30%, based on the total dry weight of the waste; (ii) processing the waste material in an extruder, which extruder is equipped with transport, kneading and heating elements such that the waste material is mixed and thermoplastic material is molten; (iii) wherein the material reaches a temperature of between about 110 and 200 °C, for more than about 2 sec before cooling; (iv) pressing the processed waste material through a die with holes between 2-200 mm, and providing feed bodies with a thickness between about 2-200 mm, and a length of between about 2-500 mm.
The invention relates to a method to produce powdery alternative fuel by milling pellets, which pellets are produced by: (i) providing waste material comprising one or more thermoplastic material(s) of more than 40%, based on the total dry weight of the waste and one or more cellulosic material(s) of more than 30%, based on the total dry weight of the waste, wherein the waste has a particle size distribution with more than 80 wt % larger than 5 mm and more than 95 wt % smaller than 60 mm, having a water content of about 8 wt % or less; (ii) subjecting the waste material through a pelletiser with holes between 4-8 mm, and a length ratio of more than 10, such that the output temperature is about 85° C. or lower, (iii) subjecting the pellets through a second pelletiser with holes between 2 and 8 mm, and a length ratio of more than 14, such that the output temperature is about 110° C. or higher; (iv) to provide pellets, (v) and the pellets are cooled to a temperature of about 30° C. or lower. The powdery alternative fuel can be transported in bulk and through blowing lines.
The invention relates to a method to produce powdery alternative fuel by milling pellets, which pellets are produced by: (i) providing waste material comprising one or more thermoplastic material(s) of more than 40%, based on the total dry weight of the waste and one or more cellulosic material(s) of more than 30%, based on the total dry weight of the waste, wherein the waste has a particle size distribution with more than 80 wt% larger than 5 mm and more than 95 wt% smaller than 60 mm, having a water content of about 8 wt% or less; (ii) subjecting the waste material through a pelletiser with holes between 4-8 mm, and a length ratio of more than 10, such that the output temperature is about 85 ºC or lower, (iii) subjecting the pellets through a second pelletiser with holes between 2 and 8 mm, and a length ratio of more than 14, such that the output temperature is about 110 ºC or higher; (iv) to provide pellets, (v) and the pellets are cooled to a temperature of about 30 ºC or lower. The powdery alternative fuel can be transported in bulk and through blowing lines.
The invention relates to a method to produce powdery alternative fuel by milling pellets, which pellets are produced by: (i) providing waste material comprising one or more thermoplastic material(s) of more than 40%, based on the total dry weight of the waste and one or more cellulosic material(s) of more than 30%, based on the total dry weight of the waste, wherein the waste has a particle size distribution with more than 80 wt% larger than 5 mm and more than 95 wt% smaller than 60 mm, having a water content of about 8 wt% or less; (ii) subjecting the waste material through a pelletiser with holes between 4-8 mm, and a length ratio of more than 10, such that the output temperature is about 85 ºC or lower, (iii) subjecting the pellets through a second pelletiser with holes between 2 and 8 mm, and a length ratio of more than 14, such that the output temperature is about 110 ºC or higher; (iv) to provide pellets, (v) and the pellets are cooled to a temperature of about 30 ºC or lower. The powdery alternative fuel can be transported in bulk and through blowing lines.
The invention relates to a method for producing pellets which are capable of providing free flowing powder suitable for firing an industrial furnace from municipal and/or other waste, the process comprising the following steps: (i) providing waste material comprising one or more thermoplastic material(s) of more than 40%, based on the total dry weight of the waste and one or more cellulosic material(s) of more than 30%, based on the total dry weight of the waste, wherein the waste has a particle size distribution with more than 80% larger than 5 mm, more than 95% smaller than 60 mm, (ii) subjecting the waste material through a pelletiser with holes between 4-16 mm and a length ratio of more than 2, and subjecting the pellets through a second pelletiser with holes between 4 and 10 mm, and a length ratio of more than 2 to provide pellets with a diameter between 4 and 10 mm, and a length of between 3 and 50 mm. The invention also relates to pellets obtained and having advantageous properties.
The use of pellets comprising one or more thermoplastic material(s) of more than 40%, based on the total dry weight of the pellets and one or more cellulosic material(s) of more than 20%, based on the total dry weight of the pellets, as a reducing agent in a process for making pig iron in a blast furnace. The pellets can be provided in unground form, as a partial replacement of coke through the top of the blast furnace, or can be provided as reducing agent in the raceway in an amount of higher than 10 kg/ton iron.
The invention relates to a method for producing pellets which are capable of providing free flowing powder suitable for firing an industrial furnace from municipal and/or other waste, the process comprising the following steps: (i) providing waste material comprising one or more thermoplastic material(s) of more than 40%, based on the total dry weight of the waste and one or more cellulosic material(s) of more than 30%, based on the total dry weight of the waste, wherein the waste has a particle size distribution with more than 80% larger than 5 mm, more than 95% smaller than 60 mm, (ii) subjecting the waste material through a pelletiser with holes between 4-16 mm and a length ratio of more than 2, and subjecting the pellets through a second pelletiser with holes between 4 and 10 mm, and a length ratio of more than 2 to provide pellets with a diameter between 4 and 10 mm, and a length of between 3 and 50 mm. The invention also relates to pellets obtained and having advantageous properties.
The invention relates to a method for producing pellets which are capable of providing free flowing powder suitable for firing an industrial furnace from municipal and/or other waste, the process comprising the following steps: (i) providing waste material comprising one or more thermoplastic material(s) of more than 40%, based on the total dry weight of the waste and one or more cellulosic material(s) of more than 30%, based on the total dry weight of the waste, wherein the waste has a particle size distribution with more than 80% larger than 5 mm, more than 95% smaller than 60 mm, (ii) subjecting the waste material through a pelletiser with holes between 4-16 mm and a length ratio of more than 2, and subjecting the pellets through a second pelletiser with holes between 4 and 10 mm, and a length ratio of more than 2 to provide pellets with a diameter between 4 and 10 mm, and a length of between 3 and 50 mm. The invention also relates to pellets obtained and having advantageous properties.
The invention relates to the use of pellets comprising one or more thermoplastic material(s) of more than 40%, based on the total dry weight of the pellets and one or more cellulosic material(s) of more than 20%, based on the total dry weight of the pellets, as a reducing agent in a process for making pig iron in a blast furnace. Said pellets can be provided in unground form, as a partial replacement of coke through the top of the blast furnace, or can be provided as reducing agent in the raceway in an amount of higher than 10 kg/ton iron.
The invention relates to the use of pellets comprising one or more thermoplastic material(s) of more than 40%, based on the total dry weight of the pellets and one or more cellulosic material(s) of more than 20%, based on the total dry weight of the pellets, as a reducing agent in a process for making pig iron in a blast furnace. Said pellets can be provided in unground form, as a partial replacement of coke through the top of the blast furnace, or can be provided as reducing agent in the raceway in an amount of higher than 10 kg/ton iron.
The invention provides a process for producing cement, the process comprising providing heat to a cement manufacturing process using a secondary fuel, wherein the secondary fuel comprises cellulose and plastic and is in the form of pellets of a size between about 3-25 mm thickness, having a calorific value of about 16 GJ/ton or more, and wherein said secondary fuel is supplied at a place between the kiln inlet and the first cyclone, wherein after formation of the cement clinker, the cement clinker is cooled and milled to cement powder. Preferably, the secondary fuel is supplied to the riser pipe or to a pre-kiln combustion chamber. Generally, the secondary fuel is provided at a place which allows the pellets to burn before coming in contact with the cement materials in the kiln, while it also does not rise into the cyclone, thereby preventing blocking of the cyclones.
The invention relates to a process for firing an industrial furnace, in particular for electricity generation, wherein coal or cokes together with a secondary fuel comprising cellulose and plastic, in the form of pellets of a size larger than about 3 mm thickness, and having a caloric value of about 16 GJ/ton or more is ground to a powder wherein about 95 wt % or more has a particle size smaller than 2 mm and wherein the d50 of the particle size distribution is between about 5 and about 100 μm, wherein the powder is injected in the flame of the furnace. In this process the grinding is performed in a roller mill or ball mill, and the amount of pellets used together with the coals preferably is about 3 wt % or more, relative to the coal.
F23G 5/00 - Procédés ou appareils, p. ex. incinérateurs, spécialement adaptés à la combustion de déchets ou de combustibles pauvres
F23G 5/033 - Procédés ou appareils, p. ex. incinérateurs, spécialement adaptés à la combustion de déchets ou de combustibles pauvres comportant un traitement préalable consistant en une désagrégation ou un broyage
C10L 5/40 - Combustibles solides à base essentielle de matières d'origine non minérale
F23G 5/08 - Procédés ou appareils, p. ex. incinérateurs, spécialement adaptés à la combustion de déchets ou de combustibles pauvres comportant un chauffage supplémentaire
F23G 7/12 - Procédés ou appareils, p. ex. incinérateurs, spécialement adaptés à la combustion de déchets particuliers ou de combustibles pauvres, p. ex. des produits chimiques de matières plastiques, p. ex. de caoutchouc
13.
PROCESS FOR PRODUCING CEMENT USING A SECONDARY FUEL
The invention provides a process for producing cement, the process comprising providing heat to a cement manufacturing process using a secondary fuel, wherein the secondary fuel comprises cellulose and plastic and is in the form of pellets of a size between about 3-25 mm thickness, having a calorific value of about 16 GJ/ton or more, and wherein said secondary fuel is supplied at a place between the kiln inlet and the first cyclone, wherein after formation of the cement clinker, the cement clinker is cooled and milled to cement powder. Preferably, the secondary fuel is supplied to the riser pipe or to a pre-kiln combustion chamber. Generally, the secondary fuel is provided at a place which allows the pellets to burn before coming in contact with the cement materials in the kiln, while it also does not rise into the cyclone, thereby preventing blocking of the cyclones.
The invention relates to a process for firing an industrial furnace, in particular for electricity generation, wherein coal or cokes together with a secondary fuel comprising cellulose and plastic, in the form of pellets of a size larger than about 3 mm thickness, and having a caloric value of about 16 GJ/ton or more is ground to a powder wherein about 95 wt% or more has a particle size smaller than 2 mm and wherein the d50 of the particle size distribution is between about 5 and about 100 µm, wherein the powder is injected in the flame of the furnace. In this process the grinding is performed in a roller mill or ball mill, and the amount of pellets used together with the coals preferably is about 3 wt% or more, relative to the coal.
04 - Huiles et graisses industrielles; lubrifiants; combustibles
39 - Services de transport, emballage et entreposage; organisation de voyages
40 - Traitement de matériaux; recyclage, purification de l'air et traitement de l'eau
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Fuels; fuel mixtures. Advisory services relating to energy or heat distribution. Transforming cellulose, plastic or plastic waste fractions
into pellets to be used as co-fuel in furnaces or kilns;
generating electricity; generating heat; treatment of waste
materials; advisory services relating to energy or heat
production; advisory services relating to cellulose, plastic
or plastic waste fractions being used as fuel to generate
energy in lime kilns, cement kilns and industrial boilers
and furnaces. Scientific and technological services and research and
design relating thereto; analysis and diagnosis of fuels and
waste fractions; development services relating to energy or
heat production; development services relating to lime
production; development services relating to cement
production; development services relating to industrial
boilers and furnaces; analysis and development services
relating to the development of technology to convert
cellulose, plastic or plastic waste fractions into energy
pellets for co-combustion in power plants, lime kilns or
cement kilns; consultations in industrial design, technical
research and environmental protection; engineering advisory
services; technical professional studies with respect to the
development of technology on separation, drying, pelletizing
and grinding of waste fractions.
