摘要:
The invention discloses method and system of drying renewable sources of energy and raw material. The drying process is carried out under partial vacuum conditions and at lower temperatures than conventional dryers. The temperature to dry the material and the rate of water removal are controlled by regulating the degree of vacuum and the intensity of heat input. A method for drying material to moisture content below 10% by weight, comprises introducing into an ejector a stream with a pressure above ambient pressure, creating partial vacuum in a drying chamber through the secondary nozzle of the ejector when the stream enters the ejector and provides the motive pressure to the primary nozzle of the ejector, said drying chamber having an inlet into which a wet material is introduced and an outlet for taking out the dried material after the drying treatment, drying the wet material using low temperature waste heat.
摘要:
Material processing apparatus (20) includes a housing (22) with a plurality of vertically stacked inverting pan conveyors (42, 44) therein. Each conveyor (42, 44) includes a plurality of conveyor pans (50) traveling between and around aligned front and rear sprocket pairs (90, 92) to define upper and lower conveyor runs (52, 54). Each pan (50) has a perforated base plate (56) presenting a pair of opposed material-supporting surfaces (58, 60). As the pans (50) traverse the sprocket pairs (90, 92), they are inverted, and material (110) carried by the upper run pans (50) is transferred to the lower run pans (50) by passage of the material around and/or between the sprocket pair (90).
摘要:
There is provided a multi-module counterflow drying apparatus (100) for drying material, the apparatus (100) comprising: a material inlet (102); a material outlet (104); a heat inlet (108) for inputting heat to the apparatus such that the heat traverses the apparatus in the opposite direction than the material; and a plurality of mutually interchangeable modules (110) stacked on top of each other, wherein the material is configured to move in the apparatus from one module to another such that the movement direction of the material in a given module is opposite to the movement direction of the material in a module above or below, wherein each module (110) comprises: movable paddles (210) configured to discontinuously move the material forward in the module (110).
摘要:
A multiple product belt drier having a first air permeable conveyor belt on which the materials to be dried are poured to form a first drying path; at least a second air permeable conveyor belt to assure at least a second drying path for drying the materials after the first one; an air blowing mechanism; an air heating mechanism for heating the blown air to dry the materials, and a drying air distribution circuit for distributing the drying air towards the materials and the belts; the drying air circuit being provided so that the drying air circulates downwards through the materials to be dried and the belts, and an air reheating mechanism is provided between the two paths to reheat the air which has passed through the layer of materials on the first belt, before it passes through the layer of materials on the second belt.
摘要:
A method for aerobically air-drying sludge cakes is provided. The method comprises: crushing and dispersing sludge filter cakes into a layer of sludge granules, blowing with positive pressure dry air into the layer of sludge granules moving at low speed or overturned so that the sludge granules experience aerobically exothermic reactions, which make moisture rapidly evaporated from sludge granules and moved to the dry air by mass transferring under the effect of both the external heat and internal heat, physically or chemically sterilizing the sludge granules moving at low speed or overturned, pumping out tail gas by negative pressure from the layer of sludge granules, washing and then discharging, and further pulverizing the dried sludge granules to reach the reclamation requirements. At the same time, an apparatus for carrying out the method is also provided. The method is high in heat conducting and mass transferring efficiency when drying and low in energy consumption for drying. It accelerates the drying speed. The sludge granules can be stably and safely processed during the drying. In addition, the dried tail gas can meet the environment-friendly discharge standard, and the output sludge is good for sludge reclamation.
摘要:
The present invention is a system for processing organic waste using insect larvae, which has the advantage of being able to process large quantities of organic fecal waste material. The system includes a plurality of substantially flat reaction vessels stacked one on top of the other in parallel arrangement to form a processing blocks 11. Each of the reaction vessels in the processing block 11 are dimensioned and configured to contain a quantity of organic waste, each reaction vessel having front and back ends and side edges, the reaction vessels each being separated from the reaction vessel above by an air space 23, the processing block being contained in a plant enclosure having side walls. At least one of the side walls of the plant enclosure (plenum wall 38) is positioned adjacent the processing block such that the plenum wall is adjacent one of the side edges of the reaction vessels. The plenum wall has a plurality of openings which open to the air spaces and the openings positioned on the plenum walls such that openings are immediately adjacent air spaces. The system further includes an air circulation system for circulating purified and adjusted air through the air spaces by passing air through each of the openings in the plenum wall. The system also includes a feeder system for loading raw organic waste onto the reaction vessels and a discharge system for removing processed organic waste from the reaction vessels.
摘要:
The invention comprises method of and apparatus for drying pasty materials. The pasty materials are subjected to a first drying stage (1) at a first temperature, and then subjecting the partially dried pasty material are subjected to a second drying stage (10) at a second temperature. The second temperature is lower than the first temperature. The invention also envisages a method of drying and sterilising a pasty material comprising the steps of subjecting the pasty material to a first heat sterilisation process (1) and then a second heat drying process (10). The invention also envisages a method of drying pasty materials wherein the pasty material is broken into pieces (55) and partially dried (56) to form a crust at least partially over each piece prior to further processing of the pasty
摘要:
A system and a method for reducing the level of moisture of fluent materials or wet solid materials, characterized in that the material to be treated is provided in a particle form and then exposed to a relatively high volumetric flow of gas treating medium which is drawn through the material so as to force the moisture in the center of each individual piece to migrate towards the periphery thereof where it can be easily evaporated. Air at ambient temperature may be used as gas treating medium so as to minimize the level of energy required to provide an efficient drying operation.