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High Rate Thickeners

Description The High-Rate thickeners became popular in the mid 1980 s and are relatively newcomers to the sedimentation line of equipment As already discussed previously Thickeners are a major component in a plant layout and occupy large spaces which may be saved by introducing high-rate machin Furthermore, they are normally positioned far away from the center of the plant so to allow ....

The Mill Dorr Thickener

Jul 24, 2018 0183 32 Dorr Thickener This was posted on the Steel Mill Facebooks group and it is a good explanation and use of a Dorr thickener The explanation an photos by ,...

CHAPTER 6 DESIGN AND CONSTRUCTION OF SLUDGE ,

CHAPTER 6 DESIGN AND CONSTRUCTION OF SLUDGE TREATMENT FACILITIES Thus, anaerobic digestion has its importance The solids recovery rate varies at each stage of sludge treatment and is shown in Table 63 Table 63 Example of solids recovery rate in each treatment stage Source Guideline and Manual for Planning and Design in Japan, JSWA, 2009...

Conventional Thickeners

The picture on the right shows a 6 meter diameter wooden tank Dorr thickener installed back in 1908 in the Kennicott Copper Mill in McCarthy, Alaska and in 2011 I had the thrilling opportunity to fly from Chitina to McCarthy in a six seater plane to visit the abandoned mill , Hence, they are always of a robust design to meet the most ....

Lamella Sedimentation A Compact Separation Technique

to the Dorr thickener design concept As will be explained below, modern grav ity lamella sedimentation technology has now succeeded in combining recent results in fluid dynamics research and the design possibilities that modern materials technol ogy offers Furthermore, gravity lamella sedimentation technology is profiting from...

Most common problems in thickener operations part 2

The design stage is the most relevant aspect to determine the diameter area and the torque of the thickener For a fit for purpose design, the industry and tank manufacturers recommend a to carry out laboratory and pilot tests with representative samples along the mining plan, b to perform sensitivity analysis versus mineral particle size ....

THE DORR COMPANY / pgs

In 1906 Dorr was engaged as consultant on the remodeling of the dry crushing mill of the Mogul Mining Co, which was having trouble with slime collection He conceived the idea of continuous slime thickening in flat-bottomed tanks and developed the first Dorr continuous thickener In 1910 came the Dorr agitator and inciples later two new pr...

524 The thickener

Oct 22, 2021 0183 32 A four-tray thickener is illustrated in Figure 512 this type of equipment generally gives a better performance for clarification than for thickening Figure 512 Four-tray Dorr thickener The satisfactory operation of the thickener as a clarifier depends upon the existence of a zone of negligible solids content towards the top...

THE HISTORY OF DORR

1925 -Dorr develops washing tray thickener and opens overseas offices inParis and Berlin 1927 Dorr designs Detritor for sewage degritting 1928 Oliver acquires United Filter, and with it the company s principal manufacturing facility in Hazleton, Pennsylvania Also develops and markets first Oliver-Campbell cane mud...

Thickeners and clarifiers Complete range of reliable and ,

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 ,...

Thickening Agent

The thickener was applied at various concentrations 0, 4, 8, or 12 g/l in the pretreatment bath to determine the effect of cationization on the optimal level of thickenerThe concentrations of soda ash and urea in the pre-treatment were 40 and 100 g/l respectivelyThe fabrics, untreated cotton and cotton cationized with 100 g/l reactant, were printed with the cyan ink at 360 and 720 dpi ....

A description of the sedimentation process during dynamic ,

conditions of thickeners, consideration should be made for test work to be conducted under dynamic continuous sedimentation conditions rather than the current batch methods 1 Introduction Eleven years after the development of the continuous thickener by Dorr in 1905, Coe and Clevenger...

Design of Scalloped

Some thickeners such as the Center, Hardinge and Hydrotator types combine thickening with filtering2 while others such as the Dorr type are pure thickeners l 2 , 3 A schematic diagram of the traction type Dorr thickener is shown in Fig 1 This type is appropriate for tanks over 15 m 50 ft in diameter...

Thickening in the 20th century a historical perspective ,

May 01, 2003 0183 32 This paper reviews the development of thickening theory and practice during the 20th century It starts with the early design of the Dorr thickener and describes the progress made in understanding the process in the laboratory and in the plant The major contributions of Coe and Clevenger, Comings and Kynch are given in detail and the recent developments by several authors, ,...

Planning and Design of Hard

Jan 01, 1988 0183 32 The sedimentation properties of the slurry, expressed as the sedimentation rate, determine the area of Dorr thickeners used to clarify washery and flotation water The approximate unit feed load of a Dorr thickener as a function of slurry sedimentation rate is VI = 065VS, 77 where V D -- unit load of the Dorr thickener, m 3 /h m 2 Vs ....

PDF Thickening in the 20th century A historical perspective

Abstract and Figur This paper reviews the development of thickening theory and practice during the 20 th century It starts with the early design of the Dorr thickener and describes the ....

Sewage Sludge Thickening Tests

made design engineers and sewage treatment plant operators have striven for this goal Inert or stable materials have been concentrated in thickeners by industry for years However, sew age sludge presents a special problem the sludges are unstable and decom position occurs during the time re quired for thickening concentration...

Circular clarifier

The basic machine design provides for flash mix, coagulation, flocculation, solids recirculation, clarification, and positive sludge removal in a single basin - eliminating the need for multiple tanks and associated piping and pumping , Other FL Dorr-Oliver Eimco products Thickening and clarifying gravity thickener Deep Cone ....

Dorr thickener Article about Dorr thickener by The Free ,

Disclaimer All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only...

A Century of Research in Sedimentation and Thickening

21 The invention of the Dorr thickener and thickener design 1900-1940 Classification, clarification and thickening all in-volve the settling of one substance in solid particulate form through a second substance in liquid form, but the development of each one of these operations has followed different paths While clarification deals with...

Dorr Thickener 3D CAD Model Library GrabCAD

Oct 31, 2018 0183 32 Dorr Thickener for water The Computer-Aided Design CAD files and all associated content posted to this website are created, uploaded, managed and owned by third party users...

Design of Scalloped

A schematic lia gram of thr traction type Dorr thickener is shown in Fig 1 This type is appropriatr for tanks over 15 m 50 ft in diametrr This tank emplovs a rotating raking mechanism which moves the settled material towartt the central discharge For this and other thickeners, it ,...

Marvine Colliery, Dorr Thickener Plant No 1, West side ,

The Marvine Collier Dorr Thickener No 1 is important to the history of the anthracite mining industry, as this type of thickener apparatus was rare in anthracite mining operations Research indicates that this particular Dorr separator was the first of its kind to be constructed and used in Delaware and Hudson Coal Company operations...

PDF THICKENER DESIGN, CONTROL AND DEVELOPMENT

Given recent developments in thickener design and modelling, this should not be the case , 1904 and Dorr Conventional thickeners are cha racterised by low solids ,...

Heritage Brands Ovivo Water

Ovivo is a powerful global brand with renowned trademarks, possessing more than 150 years of expertise and references in water treatment The combined strengths of our heritage brands, whether owned by Ovivo or used via license, and extensive system integration knowhow create one of the most comprehensive banks of technology in the sector as well as one of the most impressive list of referenc...

Counter Current Decantation

Apr 22, 2017 0183 32 Dorr Thickener The mechanics of the decantation system is of the simplest, but is worthy of study nonetheless The Dorr thickener is universally used for the separation and is so well known and so standardized that it need only be mentioned in passing It has been fully described by Mr Dorr himself in a paper read before the Institute...

How a Thickener Works

Jul 13, 2016 0183 32 The Dorr torq thickener is a new development in the unit thickener field The raking mechanism is supported from a stationary central pier on which the driving motor and gear reduction are mounted The feed may be introduced at the center through a launder suspended above the top of the liquid leavel or by means of a siphon feed through the ....

Dynamic modeling of industrial thickener for control design

This paper provides a concise review of the contributions to research in sedimentation and thickening that were made during the 20th century, starting from the invention of the Dorr thickener in 1905...

Clarifier Drives

Your source for new, used, and refurbished clarifier driv Featuring Eimco clarifier drives, Dorr-Oliver Drives, Ovivo drives, and many more...

Beginners guide to thickeners

Jun 16, 2017 0183 32 Beginners guide to thickeners Thickening is a process where a slurry or solid-liquid mixture is separated to a dense slurry containing most of the solids and an overflow of essentially clear water or liquor in leaching processes The driving force for the separation is gravitational, where the differences in phase densities drive the ....