Knowing how to size a thickener and determine the capacity required to handle a pre-determined 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 ...
This paper presents a development of thickening theory which provides a reliable and easy-to-use method for determining the size of continuous thickeners from batch settling tests. It also offers a description of thickener operation performance based upon the proposed method. Thickener Operation Figure 13 shows a log-log relationship between underflow concentration and unit area at various ...
Thickener Sizing. Contact Details MIP House, 4A Coombe Place, Rivonia 2128 Telephone Number: +27 (0) 11 234 1007 Fax Number: +27 (0)86 682 2394 Emergency Number:
3. Dynamic thickener testwork. This is the method through which the most accurate thickener sizing and prediction of process performance is achieved. Most reputable and experienced thickener suppliers have developed a number of dynamic testwork units of various sizes and configurations.
My topic is about calculations for Sizing a high rate thickener: During the last decade, various methods have been utilized in sizing a thickener such as Coe and Clevenger, Talmage and Fitch and Wilhem-Naide. Which method is superior (recommended) in sizing a high rate thickener? Which value of impa
Thickener sizing should account for variability in both the quantit y and quality of feed that is presented . to it. Testwork data should indic ate the frequency and extent of slow-settling solids
We generally operate at a thickener rake speed of 8 to 12m/min Thus gearbox output rpm = = rake tip speed (m/min) π x diameter (m) = 8 π X 12 = 0.21 rpm (d) Electric motor sizing To size an electric motor, we would use the following calculation; P = 2 π N T
Many thickener installations operate with water recovery below design limits largely through conservative control and low prioritization of thickener optimization. The operation of the thickener must accommodate fluctuations – control for disturbances – in the process feed stream to deliver a clear overflow and thickened underflow.
There are several thickener designs in use; most are of the settlement type developed for industrial applications, which uses heavy duty scrapers with a picket fence attachment. A design developed in the UK by the WRc ( Warden, 1983 ), for waterworks sludge thickening applications, consists of a cylindrical tank of water depth 2–3.5 m with a shallow sloping floor (1 in 20).
In order to develop rational methods of measurement and laboratory testing, it becomes necessary to study the general phenomena of settling rates. Since it was desired to give the public the benefit of these methods at as early a date as possible, together with the knowledge of the general principles of slime settling necessary for a clear understanding of the laboratory tests, we have ...
There are several thickener designs in use; most are of the settlement type developed for industrial applications, which uses heavy duty scrapers with a picket fence attachment. A design developed in the UK by the WRc ( Warden, 1983 ), for waterworks sludge thickening applications, consists of a cylindrical tank of water depth 2–3.5 m with a shallow sloping floor (1 in 20).
Correct thickener and clarifier sizing ensures dependability and efficiency with a margin of safety for process upsets, allowing the greatest operational flexibility. Our experienced engineers are ready to help you with equipment sizing and selection. We will work with you to …
Request PDF | On Feb 1, 2014, Gh.A. Parsapour and others published Effect of settling test procedure on sizing thickeners | Find, read and cite all the research you need on ResearchGate
10-02-2014· In the great majority of metallurgical application the thickener sizing is determined by clarification or mass settling zones. However, if the solids must be retained in the compression zone in the batch tests for long time (usually over 4 h) in order to reach the desired underflow concentration, solids compressibility must be controlled .
Barry A. Wills, James A. Finch FRSC, FCIM, P.Eng., in Wills' Mineral Processing Technology (Eighth Edition), 2016. 15.2.5 Thickener Sizing. Sizing methods include by experience, cylinder (or jar) settling tests, and pilot plant testwork (McIntosh, 2009).Experience (or “rule of thumb”) is used if there is no sample, or to prepare a rough first draft for sizing equipment for budget purposes ...
thickener in a peripheral launder. The conventional thickener relies on the settling velocity of the particles, due to gravity, being greater than the upward velocity of water being displaced to the overflow launder. The conventional thickener can be used with or …
A thickener operates pretty much like a settling tank. The feed enters from the middle, are distributed radially, the settled sludge is collected from the underflow, the effluent exits over the weirs. In a continuously operated thickener, there are different zones of concentration. The topmost dear zone ...
Inclined Plate Clarifier (parallel plate, lamella) Theory of Operation. Basic concepts and theories of clarification. If you are unfamiliar with basic inclined plate clarifier (plate settler, parallel plate clarifier, lamella plate settler, etc.) design principles, a review of the "Inclined Plate Clarifier (parallel plate, lamella) Theory of Operation" might prove helpful.
01-01-1985· Chemical Engineering Science VoL. 40, No. 7, pp. 1301 1303, 1985 Printed in Great Britain. Shorter Communications 0009 2509/85 53.00 + .00 Pergamon Press Ltd. Calculation of thickener area and depth based on the data of batch-settling test (Received 7 June 1983; accepted 15 November 1983) vo V2 F=C w Upon rearrangement eqn (5) becomes: pt\c C2 the area of a cross-section is given as …
The 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. The ...
Barry A. Wills, James A. Finch FRSC, FCIM, P.Eng., in Wills' Mineral Processing Technology (Eighth Edition), 2016. 15.2.5 Thickener Sizing. Sizing methods include by experience, cylinder (or jar) settling tests, and pilot plant testwork (McIntosh, 2009).Experience (or “rule of thumb”) is used if there is no sample, or to prepare a rough first draft for sizing equipment for budget purposes ...
Picket Fence Thickener Sizing: The Industry Standard Maximum Upward Flow Velocity (according to Water Research Council (WRC) = 1.5 m/hour. Maximum Upward Solids Loading (according to WRC) = 4 kg/m 2.hour. Volume of settled backwash sludge = B. Volume of Clarifier Sludge = C (as calculated above) Total Volume of Incoming Sludge = B+C
01-01-1985· Chemical Engineering Science VoL. 40, No. 7, pp. 1301 1303, 1985 Printed in Great Britain. Shorter Communications 0009 2509/85 53.00 + .00 Pergamon Press Ltd. Calculation of thickener area and depth based on the data of batch-settling test (Received 7 June 1983; accepted 15 November 1983) vo V2 F=C w Upon rearrangement eqn (5) becomes: pt\c C2 the area of a cross-section is given as …
Testwork and sizing for paste thickeners. Posted by Matrix on 29th March 2006 As we approach the Paste06 conference in Ireland at the beginning of April, ... Unit mud volume is defined as “the volume of thickener bed (mud) required to achieve a given underflow % solids at a throughput of 1 t/h of dry solids”.
16-10-2019· Sizing a clarifier. A starting point for sizing clarifiers for most sand and mineral processing applications is 1gpm/ft or 2.2m3/hr/m2 ... How to size a thickener.
DELKOR, your sedimentation specialist supplies its clients with a wide variety of thickening equipment, with designs of up to 100 m in diameter. We leverage our experience from over 35 years of providing thickening and clarifying solutions to the mining, minerals processing and chemical industries to provide you with the most suitable and efficient sedimentation solution for your individual ...
Clarifier Sizing Spreadsheet. Below is a link to a clarifier sizing spreadsheet developed by HydroFlo Tech. By inputting the major design criteria, you can solve for the clarifier projected surface area and overall clarifier volume. The spreadsheet operates on Microsoft Excel 2003 or later.
EIMCO and Dorr-Oliver thickeners are available in both bridge-supported and column-supported designs. We offer beam- or truss-type bridges, depending on thickener diameter. In the bridge-supported design, suitable for thickeners up to 50 m in diameter, the drive is supported by the bridge, driving the rakes with a centre shaft.. Column-supported design drives are supported by a stationary ...
Sizing a Component Thickener Our wastewater thickeners are sized to provide an optimum floor loading rate for a specific influent mixture of primary and secondary sludge. Table 2 lists typical loading rates for different influent profiles. To calculate the required thickening area, divide the total daily solids load in pounds, by the rate from
Monroe Environmental builds Primary and Secondary Circular Clarifiers for industrial and municipal wastewater treatment, as well as Flocculating Clarifiers and Solids Contact Clarifiers for clean water or potable water applications. Our experienced staff will provide high efficiency, low maintenance systems that will provide the highest return on investment.
