Knowing how to size a thickener and determine the capacity required to handle a predetermined tonnage of a certain pulp, by overflowing a clear solution and obtaining the desired pulp density of thickener discharge, depends upon the settling rate of that particular pulp. The settling rate of any pulp is easily determined by simple laboratory tests such as outlined below: Laboratory Test ...
Get PriceLABORATORY TESTING FOR DESIGN OF THICKENER CIRCUITS Joseph M. Keane K D Engineering Co., Inc. 1844 W. Grant Road, Suite 106 Tucson, Arizona 85745 Introduction Feed dilution or solidsliquid weight The English word "sedimentation" ratio is derived from the Latin verb "sedere" Size and shape of the particulate meaning to sink down.
Get PriceBeginners Guide to Thickeners; Beginners Guide to Thickeners. Thickening is a process where a slurry or solidliquid mixture is separated to a dense slurry containing most of the solids and an overflow of essentially clear water (or liquor in leaching processes).
Get PriceFeedwells are a significant factor in thickener performance. The cuttingedge design of the Outotec Vane Feedwell marks the first major innovation in the thickening and clarifying industry since the early 1990s. One of the main design features is the interconnected upper and lower zones.
Get PriceDesign Data For Thickener How to Size a Thickener Mineral Processing Metallurgy. Knowing how to size a thickener and determine the capacity required to handle a predetermined tonnage of a certain pulp, by overflowing a clear solution and obtaining the desired pulp density of thickener discharge, depends upon the settling rate of that particular pulp.
Get PriceIt is employed mainly in design calculations to determine the required thickener area, the most important design parameter, and ultimately the maximum steady state underflow concentration that is possible for a given solid throughput. In addition, the capital cost of a thickener will be dependent on the calculated required settling area.
Get PriceDrum Thickener PRS: reliable thickening and dewatering of pulps. The performance of the gravity drum thickener is based on 50 years of pulp dewatering experience. The Drum Thickener PRS is a simple, cost efficient, and reliable filter for dewatering stock and broke ( and recycled fibers) in a consistency range of –%.
Get PriceThickening or dewatering may be defined as the removal of a portion of the liquid from a pulp or slime made up of a mixture of finely divided solids and liquids. The early methods of thickening employed plain, flatbottomed tanks into which the pulp was fed until the tank was full. The solids were then allowed to settle as long as required, the top liquid was decanted, the settled solids were ...
Get PriceOn the method of thickener area calculation based on the data of batchsettling test (Received 7 May 1985, accepted in evised form 3 October 1985) Nearly all of the current methods for the thickener area calculation stem from the work of Cot and Clevenger (1916).
Get PricexvEPA United States Environmental Protection Agency Biosolids Technology Fact Sheet Gravity Thickening DESCRIPTION Thickening is the process by which biosolids are condensed to produce a concentrated solids product and a relatively solidsfree supernatant.
Get PriceNov 30, 2017· The phenomenological theory of continuous thickening of flocculated suspensions in an ideal cylindrical thickener is .. provides a method for thickener design. for design and operation of steady state continuous thickeners.
Get Pricedesign of gravity sludge thickener design of gravity sludge thickener CHAPTER 3 SLUDGE THICKENING. Thickening is a procedure used to increase the solids content of sludge by removing a . generally accomplished by physical means including co settling, gravity settling, . practice to design these processes for both thickening and clarification.
Get PriceEPRI Environmental Industrial Environmental Research EPA600/879009 Protection Agency Laboratory April 1979 ^ Office of Research Research Triangle Park NC 27711 and Development Electric Power 3412 Hillview Avenue P/N 3283 Research Institute Palo Alto CA 94303 Lime FGD Systems Data …
Get PriceThe Difference Between a Clarifier and a Thickener is subtle as they will visually look the same. Fundamentally, thickeners and clarifiers are both used to settle solids which results in the separation of liquids and solids. Thickeners are used to concentrate solids, while clarifiers are used to purify liquids. A thickener will give you a high density underflow while a clarifier will not.
Get PriceThe costeffectiveness of sludge thickening should be considered prior to treatment and/or disposal. Capacity Thickener design should provide adequate capacity to meet peak demands. Septicity Thickener design should provide means to prevent septicity during the thickening process.
Get PriceThe Role of Thickeners in Optimizing Coatings Formulation Clemens ... as well as for the design of new rheology modifiers for next generation paints based on new binder systems. ... high shear viscosity data at plotted versus low shear data at 1000 s1; extract from Figure 6. Despite the fact that the measurements on electrophoretic ...
Get PriceThickener Design Methods . Thickener Design Methods. thickener design by coe and clevenger newstonight. Thickener Design Methods pdf BitBin. 30 11 2017· The flux curve determined by the method of Coe and Clevenger was invalid for all feed fluxes A case study shows how the required thickener area would vary. Get Price.
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Get PriceThe process control systems need a very good understanding if the thickener operation as well. My advice is to get a basic understanding of the principles and then discuss your issues with the experts the thickener suppliers and rake suppliers and get them to look at a design which suits your application.
Get PriceCase studies and generalized experiences will be discussed in detail to emphasize the numerous sludge treatment and disposal alternatives. Data will be presented to assist the design engineer in selecting the optimum unit processes for inclusion in a particular conceptual design.
Get PriceThe AMIRA P266 'Improving Thickener Technology' series of projects has sought to provide a firm scientific basis for feedwell and thickener design, a requirement as pressures on water usage in the ...
Get PriceOct 23, 2000· Thickener performance, especially for synthetic associative thickeners, depends on interactions with latexes and surfaceactive paint ingredients such as surfactants and dispersants. However, each of the four classes of organic thickeners is characterized by several attributes that are fairly independent of paint type and composition (see Table 1).
Get PriceA design method for thickeners and clarifiers known as the batch flux curve technique was developed over 20 years ago, but still is not wellknown in design and operating circles. An informal survey of major clarifier and thickener manufacturers found that none of the firms surveyed use this method for sizing and maximizing operating conditions.
Get PriceTheory and Application of Thickener Design A G WATERS ABSTRACT THEORY the sedimentation vessel has a constant crosssectionalarea the process is onedimensional and so there is no radial variation in concentration for any horizontallaycr iii) the slurry can be treated as a continuum with a continuous liquid and solid phase interacting with each ...
Get PriceChapter 5 Sludge treatment Sludge definition: ... Design of gravity thickeners:Primary and secondary sludge are either treated in separate thickeners or in one common thickener. The following table gives the design criteria ... The following data is given:
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Get PriceThe gravity thickening design is similar to a clarifier. Thickeners are usually circularshaped; the feed is carried out through a pipe to a central hood serving as distribution and still area, with a height that has no effect on compaction or compression bottom area. Except for small thickeners, static and with hopper floo r, these units have ...
Get Priceoffered to enhance performance of existing thickeners and clarifiers. tHiCkener design MIP Thickeners and Clarifiers are designed to operate continuously for 24 hours per day. Process selections are based on test work coupled with our vast experience in the field of thickening. It is our belief that a thickener should not be designed on the ...
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Get Pricehigh loaded static thickener. In some cases, it is not advisable to look for a high level of thickening ( direct dewatering using centrifugation, in order to reduce machine size see high pressure centrifuges). Dimensioning is then calculated with reference to the first part of …
Get PriceTechniques and methodologies for improving thickener performance ... based upon a knowledge of thickener design, plant flows and assessment of the flocculation behaviour of the feed slurry ...
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