bridge type conventional thickener overflow outlet

Industrial Sedimentation and Filtration Equipment

HiFlo™ High-Rate Thickeners WesTech HiFlo thickeners are used to separate solids from liquids at high flow rates. These rates are 10 to 20 times higher than those of conventional thickeners. AltaFlo Ultra High-Rate Thickeners The AltaFlo ultra high-rate thickener is a rakeless thickener providing mixing, flocculation, and internal dilution.

High Rate Thickeners - Solid Liquid Separation

High-rate thickeners that are built as dedicated machines are available in sizes up to 40 meter diameter but retrofits of conventional thickeners are often larger in size. When viewed from the outside high-rate thickeners look very much like conventional machines except that their tanks have a greater height to diameter ratio.

US Patent for Deep bed thickener/clarifiers with enhanced ...

Thickener/clarifier 10 as provided with a rotatable rake assembly 63 provides for higher underflow solids concentration, improved overflow clarity, increased rate of influent feed, reduced settling aid usage or any combination of these advantages or results than would be possible in treating slurries in conventional deep bed or low-profile ...

Thickening Basics | PDF

The object of a control system on a High Rate Thickener (HRT), as on a conventional thickener, is to obtain the required underflow density and overflow clarity at all feed conditions. The feed conditions, which may vary, include volumetric and mass feed rate, pulp density, particle size and particle type.

Simeco Shaftless Screw Conveyor - VoR Env

The CCS Shaftless Screw Conveyor consists of an Archimedean screw, without internal shaft, driven by a power transmission rotating inside a trough carrying material loaded through one or more hoppers, to one or more discharge troughs. The machine can be designed in a "pull" configuration, i.e. it pulls the material from the inlet towards ...

Conventional thickeners and clarifiers by ... -

Conventional clarifier/thickener – Design Bridge type For smaller thickeners, up to 30 – 40 m diameter, the rakes and drive mechanism are supported on a bridge superstructure, which straddles the...

Partech Report | PDF | Unit Operations | Hydrology

Bridge Type Bridge Type Column Type Thickener Thickener Thickener Basic Underflow Arrangements Pump Adjacent to Thickener with Buried Piping • Cheap but is susceptible to plugging. • More than one pipes are installed and valves are used to remove blockage. Tunnel • More expensive but has operational and maintenance advantage.

Study on Maximum Flow Rates and Sizing Method of …

（a）Vertical overflow outlet type From inside bottom （b）Horizontal overflow outlet type Figure 4 Reference point of water level 3. Experiment result 3.1. Water supply flow rate and water level rising in vertical overflow outlet type The flow rate was changed to the vertical outlet type overflow pipe, and it was

CHAPTER 5 Clarifiers - Tennessee

5.6.2 Overflow Weirs 5.6.2.1 Since closely spaced multiple overflow weirs tend to increase hydraulic velocities, their spacing should be conservative. 5.6.2.2 Center-feed, peripheral draw-off clarifiers shall not have the overflow weir against the clarifier sidewall. Weir placement shall be 1/10 diameter or greater toward the center.

Sedimentation and Clarification Sedimentation is ... - …

Sedimentation is the next step in conventional filtration plants. (Direct filtration plants omit this step.) The purpose of sedimentation is to enhance the filtration process by removing particulates. Sedimentation is the process by which suspended particles are removed from the water by means of gravity or separation.

Thickener EFK

Thickener EFK works purely by gravity. Discharge of the thick-ened stock is supported by non-contact take off devices via an adjustable overflow weir. Unlike conventional gravity drum thickeners, the EFK thickener consists of circular ring-type dewatering segments. Functional principle of Thickener EFK

Thickener VF Deaerater - Outotec

The Deaeration tank is mounted on the thickener bridge. Part of this patented design incorporates tangential feed inlet and outlet pipes. The internals of the tank are designed so that the feed is received tangentially in the upper section of the tank and passes through an orifice plate to the lower section before exiting to the feedwell.

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Investigation and Design of a Picket Fence Thickener for ...

In the event of these Pumps failing, there is a high level overflow outlet which will discharge any blended sludge to the PFT in the case of Pump Failure. 3.5.3 Picket Fence Thickeners (PFT) Picket fence thickeners enable the thickening and settlement of particles suspended in water into a sludge, which can then be removed for disposal or ...

Conventional Thickeners - Solid Liquid Separation

Conventional Thickeners are generally incorporated in heavy duty applications when the underflow density is high and substantial torques are required to …

HYDRAULIC DESIGN OF ENERGY DISSIPATORS FOR …

Figure 4-A-2. Average Velocity for Abrupt Expansion Below Rectangular Outlet (from reference 54) Figure 4-A-3. Average Velocity for Abrupt Expansion Below Circular Outlet (from reference 54) Figure 4-A-4. Average Depth for Abrupt Expansion Below Rectangular Culvert Outlet Figure 4-A-5. Average Depth for Abrupt Expansion Below Circular Culvert ...

Wastewater Clarifier Performance

The weir overflow rate (WOR) parameter is used to determine both the potential for short-circuiting in the clarifier and excessive velocities over the weir which would increase the quantity of solids carried out of the clarifier. The weir overflow rate is the number of gallons of wastewater that flow over one lineal foot of weir per day.

Clarifier - an overview | ScienceDirect Topics

Figure 14.1 is a sketch of a bridge thickener where the bridge runs across the thickener tank. The bridge supports the rakes and the motor rotating the rakes sits on a platform in the centre of the tank. The rakes are bolted to the central column which is rotated by the motor. The bridge thickeners have a maximum diameter of about 30 metres.

Raking in gravity thickeners | Request PDF

Thickener rakes are essential in the transport of sediment bed material to the underflow in conventional thickeners, however very few studies of bed transport have been published. In …

StormRax - Trash Racks and Debris Cages from Contech

The StormRax™ line of structural plastic trash racks and debris cages are used to prevent floating and particulate debris from clogging stormwater outlet control structures. StormRax trash racks and debris cages are available in numerous sizes and shapes to accommodate nearly every type of application. WHY CONTECH START A PROJECT. Description.

Thickeners Rev 2 - Wa

Wa offers conventional thickeners, Hirate thickeners, Ultra Hirate thickeners and paste thickeners. Thickener diameters up to 35 m are available with the rake mechanism supported off the bridge by structural steel at the tank walls. Wa design thickener tanks and walls ... Overflow weirs with sawtooth and scum plate baffles where float ...

Uses and Benefits of Flow Measurement in the ... - CiDRA

the thickener operation there are three important process control variables for effective performance and are responsible for measuring the flow rate in three thickener applications: the feed, the underflow discharge, and in the clear water outlet in the overflow.

(PDF) THICKENER DESIGN, CONTROL AND DEVELOPMENT

Conventional thickeners were dev eloped following the pioneering wor k by ... thickener type that are collective ly referred to as High Rate thick ... poor settling and dirt y thickener overflow.

Treatment of coal tailings - ScienceDirect

The centre outlet is typically a 45° cone on bridge type thickeners and a trench on centre column thickeners. Either requires a scraper assembly attached to the rake structure to keep the material moving. A generalised thickener is shown in Fig. 16.4.

SLUDGE THICKENER AND METHOD - PASSAVANT-WERKE

Thickener tank 1 of the first stage is of the conventional, flat design type, its diameter amounts to at least twice the normal sludge level 3. Thus, the load on the thickener floor is kept low. A scraper bridge 4 traveling on top of the cylindrical tank wall carries a stirring device 5 consisting of rabble arms and a bottom scraper mechanism 6 ...

SAG Mill Grinding Circuit Design

This acts as a buffer between the grinding circuit and the flow rate sensitive cycloning and thickening sections. SAG Mill Design and Specification The Kidston plant was designed to process 7500 tpd fresh ore of average hardness; but to optimise profit during the first two years of operation when softer oxide ore will be treated, the process ...

Industrial Sedimentation and Filtration Equipment

HiFlo™ High Rate Thickeners WesTech HiFlo Thickeners are used to separate solids from liquids at high flow rates. These rates are 10 to 20 times higher than those of conventional thickeners. AltaFlo™ Ultra High Rate Thickeners The AltaFlo Ultra High Rate Thickener is a rakeless thickener providing mixing, flocculation, and internal dilution.

Thickeners - Solid Liquid Separation

Thickeners. The separation of solids from a liquid by gravity sedimentation has traces to the early days of civilization. The normal practice at those times was to use jars or pits mainly for the clarification of extracted liquids such as wine or olive oil from contaminating insoluble matter.

Activated Sludge Clarifier Design Improvements - JSTOR

than the conventional scraper-collector mechanisms. In fact, as the clarifiers are often operated, hydraulic sludge collection may be less effective than the conventional approach. Data presented in Table 3, as reported by Katz and Geinopolos,6 indicate that higher return sludge concentrations are obtained with conventional sludge

Biosolids Technology Fact Sheet Gravity Thickening

----- TABLE 1 PERFORMANCE OF CONVENTIONAL GRAVITY THICKENING Type of Solids Primary (PRI) Trickling Filter (TF) Rotating Biological Feed (%TS) 2-7 1-4 1-3.5 Thickened Solids (%TS) 5-10 3-6 2-5 Contactor (RBC) Waste Activated Solids (WAS) PRI + WAS PRI + TF PRI + RBC PRI + Lime PRI + (WAS+ Iron) PRI + (WAS+ Aluminum salts) Anaerobically digested …