Abstract:
Bei einem Verfahren zur Trocknung von staubförmigen, insbesondere einer Vergasung zuzuführenden Brennstoffen, wie Kohle, Petrolkoks, biologischen Abfällen od. dgl., wobei der Brennstoff in einer Mühle zerkleinert und mittels eines Förder- und Trocknungsgases einem Filter- /Abscheider zugeführt und wenigstens ein Teil des Förder- /Trocknungsgases im Kreislauf nach Erwärmung in die Mühle wieder zurückgeführt wird, sollen die bekannten Nachteile nicht nur vermeiden, sondern insbesondere ein kostengünstiges Mahl- und Trocknungsverfahren und eine entsprechende Anlage vorgeschlagen werden mit geringen Emissionen und einem niedrigen Inertgasbedarf. Dies wird verfahrensmäßig dadurch erreicht, dass ein Teil des Förder- /Trocknungsgasstromes in einem Sprühturm od. dgl. abgekühlt und entfeuchtet wird, wobei ein Teil des den Sprühturm verlassenden, getrockneten Gases der Umgebung und/oder einer Feuerung und der andere Teil dem Förder-/ Trocknungsgasstrom wieder zugeführt wird.
Abstract:
The invention relates to a method and burner for injecting pulverized coal into a rotary kiln that uses pulverized coal as fuel in order to produce quick lime of excellent hydration level. The invention calcines lime stone charged into the rotary kiln, and uses pulverized coal as fuel of a heat source applied to the lime stone charged in the rotary kiln. The invention also provides a method and apparatus for producing quick lime by using the pulverized coal. The invention can use pulverized fossil fuel (hereinafter will be referred to as pulverized coal), which is created during coke manufacturing and cooling processes and collected by a dust collector, in order to produce quick lime of excellent hydration level while decreasing SOx (sulfide) and NOx (nitride) generation.
Abstract:
Le système de chauffe indirecte selon l'invention est un système dans lequel circule un combustible solide sous forme de particules, comportant une station de broyage, un foyer (7), au moins un silo intermédiaire, un séparateur, au moins un cyclone et éventuellement un ventilateur de recirculation des gaz, il est caractérisé en ce qu'un dépoussiéreur (10) capte les particules les plus fines qui sont ensuite introduites dans le foyer (7) par au moins une canalisation spécifique (52) et brûlées par au moins un brûleur spécifique (71). Les particules ultra fines sont stockées dans un silo spécifique (10) et dosées dans un alimentateur (61) puis mélangées dans des proportions bien définies avec de l'air chaud puis transportées jusqu'au brûleur spécifique (71) par la canalisation spécifique (52).
Abstract:
The present invention relates to the field of fossil fuel combustion arrangement. It relates in particular to a fuel distribution assembly for equal and homogenous pulverized fuel distribution in pulverized fuel conduits throughout. It also relates to a system for providing an equal and homogenous pulverized fuel distribution.
Abstract:
A solid biomass-to-energy combustion method includes introducing an oxygen containing gas into a combustion chamber of a suspension furnace to form a flow of gas through the combustion chamber; injecting a particulate solid biomass fuel into the combustion chamber through a port in the furnace wall and into the gas flow, and combusting the particulate solid biomass fuel in the gas flow to form a flame in the gas flow.
Abstract:
The invention relates to a device and method for controlling the fuel-air ratio during the combustion of ground coal in the firing system of a coal power plant, which comprises means for the pneumatic delivery of ground coal to the burners of the firing system of the coal power plant and means for feeding combustion air to the burners or into the firing chamber of the firing system of the coal power plant and in which the amount of combustion air and the amount of carrier air is controlled. The aim of the invention is to achieve a high reliability of the control combined with low maintenance of the air mass measurement devices for measuring the amount of combustion air and carrier air. According to the invention, this aim is achieved by a measurement device for measuring the amount of combustion air which, according to the correlation measurement method, evaluates the triboelectric effects on sensors which are arranged in series in the direction of flow of the combustion air and thus measures the flow velocity of the combustion air. To this end, between 0.1 mg and 10 mg of fine-grained particles having a particle diameter of between 20 µm and 200 µm are introduced per m3 air into the suctioned fresh air. The introduction of particles into the suctioned fresh air is carried out essentially during the starting phase of a firing system of a coal power plant. The measurement of the amount of carrier air is preferably carried out by means of a correlation measurement device that evaluates the triboelectric effects on sensors which are arranged in series in the carrier air stream in the direction of flow of the carrier air.
Abstract:
According to a method for drying fuels in the form of dust, particularly to be fed to a gasification process, such as coal, petroleum coke, biological waste, or the like, wherein the fuel (1) is crushed in a mill (2) and fed to a filter/separator (3) by means of a propellant and drying gas, and at least part of the propellant/drying gas in the circuit is returned to the mill (2) after heating, the known disadvantages are not only to be avoided, but particularly a cost-effective milling and drying method and a corresponding system are to be provided, having low emissions and a low inert gas requirement. This is achieved according to the method in that part of the propellant/drying gas flow in cooled down and dehumidified in a spray tower (6), or the like, wherein part of the dried gas exiting the spray tower is fed to the environment and/or a firing process, and the other part is returned to the propellant/drying gas flow.