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A hopper is a large, inverted pyramidal or conical container used in industrial processes to hold particulate matter or flowable material of any sort (e.g. dust, gravel, nuts, or seeds) and dispense these from the bottom when needed. In some specialized applications even small metal or plastic assembly components can be loaded and dispensed by ...
High-density solids with mineral or carbon content as a mixture from coarse and fine grained material. Maximum particle size 50 mm (1.969 in) Dry solids content up to 80 percent by weight; Energy consumption = approx. 50 Wh (180 kJ) per tonne of conveyed material and per kilometer (280 Btu per long ton or 250 Btu per short ton per mile).
Hopper vacuum systems The additional creation of a hopper vacuum is a variation of the vacuum filler concept. The vacuum system is enhanced with an additional vacuum pump, specially designed for the hopper. The hopper is closed and is connected to an upstream reservoir. The vacuum present in the hopper allows filling product to be drawn into ...
Dry decontamination is a method of removing contaminants (such as chemicals, biological particles, or other liquids, gasses, or solids) without the need to use water or other liquids. Decontamination is an essential duty of hazmat responders as it protects victims from harmful reactions to the contaminants.
Dust collectors are used in many processes to either recover valuable granular solid or powder from process streams, or to remove granular solid pollutants from exhaust gases prior to venting to the atmosphere. Dust collection is an online process for collecting any process-generated dust from the source point on a continuous basis.
Mechanical solids removal devices move as slowly as practical to minimize resuspension of settled solids. Tanks are sized to give water an optimal residence time within the tank. Economy favors using small tanks; but if flow rate through the tank is too high, most particles will not have sufficient time to settle, and will be carried with the ...
A Rotary Vacuum Filter Drum consists of a cylindrical filter membrane that is partly sub-merged in a slurry to be filtered. The inside of the drum is held lower than the ambient pressure. As the drum rotates through the slurry, the liquid is sucked through the membrane, leaving solids to cake on the membrane surface while the drum is submerged.
An automated vacuum collection system called Rööri started operation in early 2014 in the new Jätkäsaari residential neighbourhood of Helsinki, Finland. [16] All housing cooperatives and other apartment buildings were obliged to join the network. Each building has a collection point with up to five wastebins or tubes, each for different ...