摘要:
The application relates to a sludge drying method (100) according to one embodiment. The method comprises treating (116) sludge chemically in a chemical conditioning tank (248) for producing sludge floes in the sludge, separating (120), in an electric dryer by means of an electric field, water present in the sludge from its solid material, and compressing (120), in the electric dryer, water mechanically out of the sludge. The method further comprises pretreating (112) the to-be-dried sludge with ultrasound for at least weakening the cell structure of the sludge, thereby enabling the internal water stored in sludge cells to be removed in the electric dryer.
摘要:
Provided are systems and methods for drying a cereal grass, such as alfalfa, barley, clover, rye grass, Timothy grass, and the stalks, stems, grains and leaves of a cereal grass, such as oats, wheat, buckwheat, maize, millet, rice and sorghum. The systems include a first pressing roll and a second pressing roll that form a nip through which the cereal grass or forage crop can be pressed, pressing the liquid out of the cereal grass or forage crop to form a first product stream comprising a dewatered cereal grass or forage crop and a second product stream comprising liquid pressed out of the cereal grass or forage crop; at least one suction device for collecting the second product stream; an atomizer for converting the second product stream into droplets that can be applied to the surface of the first product stream; a drying chamber; and a circulation system for moving a drying medium through the drying chamber.
摘要:
A system for drying a wet lactose product stream includes a disperser configured to disperse agglomerated lactose particulates in a wet lactose stream into a dispersed wet lactose stream. A back-mixed partial drying zone is configured to at least partially dry the dispersed wet lactose stream by recirculating a partially dried lactose stream with the dispersed wet lactose stream. A plug-flow secondary drying zone is configured to dry the partially dried lactose stream to generate a substantially dried lactose stream.
摘要:
The present invention relates to a process for the torrefaction of a biomass feedstock for the production of a biofuel, the process comprising: (i) torrefaction of a biomass feedstock in a toroidal bed reactor, wherein the toroidal bed reactor comprises a reaction chamber with a substantially circumferentially directed flow of fluid generated therein to cause the biomass feedstock to circulate rapidly about an axis of the reaction chamber in a toroidal band, and to heat the biomass feedstock, wherein the fluid comprises gas or gases introduced into the reaction chamber and wherein the chamber is maintained under an oxygen-depleted atmosphere.
摘要:
The invention relates to a method and to a device for drying byproducts which are obtained during the treatment of raw materials containing starch and sugar, in particular after the fermentation and distillation thereof. According to the invention, the byproduct is fractionated in a clarifying phase having a high liquid portion and in a thickening phase. Said thickening phase is transformed, according to a conditioning method, into particles having a uniform geometry and said particles are dried in a pneumatic fluidised bed drying system having a relative intergranular void volume in the fluidised bed of between 0.5 and 0.92.
摘要:
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.
摘要:
A method and system for drying a water containing substance, such as manure, into a single dry product, wherein an airflow is conditioned, in order for the airflow to be able to take up moisture, and wherein a substance / airflow interface is provided, in order to allow the air to take up moisture from the substance at the interface to thereby dry the substance, wherein the method comprises the steps of heating the airflow, separating the substance in a relatively solid fraction and a liquid, using the relatively solid fraction to create a first, static substance / airflow interface, using the liquid fraction to create a second, dynamic substance / airflow interface, guiding the airflow to the first substance / airflow interface to dry the relatively solid fraction of the water containing substance, and thereafter guiding the airflow to the second substance / airflow interface to pre-dry the liquid fraction of the water containing substance, mixing the pre-dried liquid fraction with water containing substance.
摘要:
L'invention concerne un procédé de production en continu d'un produit en poudre, notamment du lait en poudre, à partir du produit à l'état liquide, dans lequel on effectue au moins une étape d'évaporation sous vide (El) du mélange à l'état liquide pour obtenir le produit à l'état visqueux, et on réalise au moins une étape de séchage (E2, E3) du produit à l'état visqueux pour obtenir le produit sous forme solide. Selon un aspect de l'invention, ladite étape de séchage (E2, E3) comprend au moins une première étape de traitement thermomécanique (E2) au moyen d'une machine de traitement thermomécanique dans laquelle on injecte simultanément le produit à l'état visqueux provenant de l'étape d'évaporation sous vide et une proportion déterminée de produit en poudre de la même famille que le produit à l'état liquide.
摘要:
The invention relate to wood processing engineering, in particular to sawn timber drying process, including thick-walled and round logs, with the aid of vacuum-impulse action performed on timber arranged in sealed drying chambers. The inventive method for drying thick-walled timber and logs consists in supplying steam to said drying chambers (1, 2), equalising humidity along the cross section of said sawn timber (28) inside and outside thereof and in heating the timber. Said operations are carried out with the aid of air ducts (23, 24) circled by sections, fans (20), distributors (24), air heaters (21) and guiding elements (25, 26,27) which uniformly distribute a flow through the height and length of stacked sawn timber (28). The distribution of steam and a wood syrup saturated steam-air mixture is carried out in two operations i.e. at first, in diffusers arranged between the fans (20) and the air heaters (21) and, afterwards with the aid of the guiding elements (25, 26,27) on at least two levels. The inventive method for drying thick-walled timber, i.e. beams, logs etc makes it possible to avoid the occurrence of stresses, cracks or warping of wood.
摘要:
A system and method for comminution, blending and processing of particles of a material and an additive using a high pressure fluid energy mill (104). The mill outputs a slurry comprised of particles of the material, the additive and the energy transfer fluid. The slurry is introduced into a hydrocyclone (310) for separating particles by size. The slurry is introduced into a spray dryer (108). The spray dryer atomizes the slurry, which falls through a heat zone, vaporizing the fluid. A collector (112) catches the dry falling particles.