摘要:
A system for treating feedwater includes a fluidized bed heat exchanger unit connected to receive feedwater and a flash concentrator column connected to receive feedwater discharged from the fluidized bed heat exchanger unit. A spray dryer is provided to receive a solids/liquid slurry discharged from the flash concentrator column. Feedwater can be treated by converting dissolved solids in the feedwater to suspended solids, vaporizing a portion of the feedwater to produce a solids/liquid slurry, and separating solids from the solids/liquid slurry.
摘要:
System and method for treating toxic washwater from ink, paint, pesticides and the like. The wash water is heated to a temperature on the order of 100.degree. F. in a sump positioned beneath a bed of horse manure media containing aerobic fungi and bacteria. Washwater is foam lifted from the sump to a level above the media and allowed to filter down through the media. Hot dry air is blown into the media from the side to maintain the media at a temperature on the order of 100.degree. F. and thereby promote microbiological activity and evaporation of the water in the media. Warm moist air from the media is cooled to condense the moisture, and the condensed moisture is collected as distilled water. A prefilter removes excessive amounts of solids from the washwater before it is introduced into the sump, and a Carnot cycle system provides the necessary heating and cooling for the water, media and air.
摘要:
Distillers syrup or similar liquid solutions or suspensions of organic solids and oil and water is dried to obtain granular solids with improved syrup content by continuously spraying the syrup or liquid onto the upper surface of a previous bed of granular solids while passing air through the previous bed to dry the syrup from the bottom of the bed upwardly. The upper surface layer of the previous bed is maintained at near saturation temperature of the air entering the bottom of the bed due to the cooling effect of evaporation. The syrup or liquid is continuously mixed into the upper surface layer of the granular solids to significantly increase the dried syrup or liquid content. The bottom layer of the graular solids is continuously cut and continuously removed. The bed is rotated relative to apparatus for spraying the syrup or liquid onto the bed, apparatus for mixing the syrup or liquid into the granular solids, apparatus for cutting the bottom layer of the granular solids and apparatus for removing the cut bottom solids from beneath the bed.
摘要:
Preparation of granules by making nuclei grow, in a fluidized bed, by causing a liquid material to solidify thereon. The liquid material is sprayed in the bed upwards, with the aid of a spraying device provided with a central channel through which the liquid material is supplied, and a channel concentric therewith carrying a powerful gas stream, with the liquid material contacting the gas stream and being carried with the gas stream to a dilute zone where the growth of the nuclei takes place, which zone is created by the gas stream and is completely within the fluidized bed. The liquid material is made to come out of the central channel as a virtually closed, conical film, with a thrust exceeding the thrust of the gas stream, and this film is nebulized to very fine droplets with the aid of the gas stream.In this process a very small amount of high-energetic gas is needed, while no agglomeration occurs in the bed.
摘要:
Preparation of granules by making solid nuclei grow in a fluidized bed, by causing a liquid material to solidify thereon, the liquid material being introduced into the bed from the bottom upwards with the aid of a feeding device provided with a central channel through which the liquid material is supplied and a channel concentric therewith through which a powerful gas stream is supplied, which creates a rarefied zone in the bed above the feeding device, wherein the liquid material is made to exit from the central channel into the rarefied zone as a virtually closed, conical film, nuclei from the bed are carried through the film with the aid of the powerful gas stream and next, during transport of the so moistened nuclei through the rarefied zone, the liquid material taken up by the nuclei is allowed to solidify. By this process only a small amount of high-energetic gas is required, while very little agglomeration and dust formation occurs.
摘要:
Granular potassium sorbate is continuously manufactured by spraying an aqueous potassium sorbate solution into or onto a bed of potassium sorbate particles fluidized by heated air.
摘要:
Urea granules are prepared by spraying an aqueous urea solution having a urea concentration of 70-99.9% by weight on to fluidized urea nuclei in the form of droplets having a mean drop diameter of 20-120 .mu.m at a temperature at which the water is evaporated from the solution sprayed on to the nuclei and urea crystallizes on the nuclei to form granules having a desired size.
摘要:
Radiant energy is converted to thermal energy utilizing forced convection through a fluidized bed. The bed is made up of solid, radiant energy absorbing solids in particulate form, which are maintained in fluidized condition by passage of a gas therethrough. Radiant energy impinges upon and is absorbed by the bed, and in turn is transferred thermally to the gas. The gas may be utilized to drive a gas turbine power generator, may be reacted chemically with the particulate solids or the like.
摘要:
A continuous drying and oil extraction process and apparatus wherein counterflow is established between successive vertical beds of stratified oil bearing particles in an extractor and ascending vapor solvent which passes upwardly through the beds agitating the particles therein to produce successive fluidized bed conditions, the vapor carrying liquids upwardly therewith to the top of the extractor.
摘要:
A pollution controlling aqueous waste treatment method, especially suitable for use in connection with pulp and paper mill operations, by which method waste effluents containing carbonaceous substances are subjected to a controlled oxidation process in a fluid bed reactor to effect autogenous combustion and pyrolysis of carbonaceous substances to activated carbon products suitable for such standard uses as purification and heat generation.