MC F Series Desilting & Dechalking Hydrocyclones
Overview
Cyclotech recently launched the MC F Series, a range of ultra high efficiency solids removal hydrocyclones dedicated to the following applications:
The MC F Series Desilting and Dechalking Hydrocyclones are:
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Highly efficient, designed to separate particles with a diameter range of 1mm to sub 3µm and with densities less than those of standard silica based sands;
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Manufactured from a range of specialised ceramics and ceramic composites to provide a fit for purpose and economically viable solution for each application;
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Can be packaged in either a steel or composite vessel to remove all corrosion related issues, a common and expensive problem typically associated with standard seawater filtration equipment.
Principle of Operation
A hydrocyclone has no moving parts and achieves solid/liquid separation by virtue of a pressure drop across the unit. A slurry is forced under pressure into the inlet section of the liner via a tangential inlet port. This, together with a narrow cyclone diameter, causes the fluid to spin at high velocity, which creates a high g radial acceleration field. The solid particles, being the denser phase, are forced outwards to the hydrocyclone inner wall. Here, through internal hydrodynamic forces, the solids are ejected from the apex of the cyclone while the liquid exits counter currently via an axial port adjacent to the inlet.
The separated solids from the MC F series Desilting and Dechalking hydrocyclones are either:
Either option negates the requirement for duty/standby operation (which most sea water filter technologies require). Moreover, the continuous solids outlet option ensures that there is no requirement for any control systems, back flushing systems or duty/standby operation which ensures that the system is simple, compact, robust and light weight.
MC F Series Desilting and Dechalking Hydrocyclone Liner Design
The MC F Series Desanding hydrocyclone geometries have been developed in house and have undergone rigorous testing both in the lab and in the field. The trade off between separation efficiency and capacity is a strong function of hydrocyclone diameter. The smaller the diameter, the smaller the particles that can be separated but the lower the capacity of each hydrocyclone. Cyclotech offer two model sizes within the MC F Series range to ensure that an optimised technical and commercial solution can be offered for a diverse range of Desilting and Dechalking applications:
In the MC F Series configuration, large numbers of small diameter Desanding Hydrocyclones are installed in a single vessel to achieve high soilds removal efficiencies at high flow rates. In all cases, the liner packing density is highly efficient which allows Cyclotech to offer compact vessel designs.
High Turn Down (HTD) Vessel Design
For applications requiring very high turndown, Cyclotech offers its HTD compartmentalised vessel approach. Internal baffles are used to divide the vessel into either two or more compartments. Each compartment can be switched in or out of service using external valving, effectively providing a number of hydrocyclone liner banks within a single vessel housing. This operation can be automated. The Cyclotech HTD design has considerable benefits over traditional methods to increase turndown as it removes the need for either blanking liners or multiple vessels. In a typical installation, the Cyclotech HTD design can increase turndown from 3:1, a typical value for a conventionally designed vessel, to 10:1 for a two compartment HTD vessel and over 50:1 for a three compartment HTD vessel. The use of a more efficient liner model in the MC F Series range can increase these quoted turndowns still further.
New-Build Systems
Cyclotech’s MC F Series Desanding hydrocyclone new build systems can range from fully automated packaged systems to stand alone vessels. Standard pressure vessel designs are available at most design pressures and temperatures and to most common design codes such as PD5500, ASME VIII, AS 1210 or GOST-R. Materials of construction range from standard and low temperature carbon steels through to most stainless steels such as Duplex, 6Mo, Super Duplex, 625, 825 and other high end alloy steels. However, corrosion in oxygentated sea water filter systems is a widespread problem and it is generally accepted that all these systems will eventually start leaking due to corrosion. Standard materials for these vessels tends to be carbon steel internally lined with coatings such as Glass Flake. For Seawater Desilting applications, Cyclotech can offer the MC F Series Hydrocyclone systems for these applications manufactured completely from non metallic materials to avoid this corrosion problem. The pressure vessel is fabricated from GRE composite designed generally in accordance with the BS4994 composite pressure vessel code while the internal liner support plates are fabricated from specialised thermo plastics.
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Field Testing.
Cyclotech has a range of MC F and
MC Series single liner test units (up to 300#), which can be used to determine the separation performance of the differing MC and MC F Series models on live fluids. These test units are compact, require no utilities and come complete with all required valving, instrumentation and hosing. Cyclotech can also perform a full particle characterisation analysis of the existing Produced Water Treatment as part of these performance trials. This includes particle size distribution, average solids concentration and oil on solids analyses.
Leased Equipment
Cyclotech can offer an unparalleled fleet of flexible, production scale skid mounted
Sand Management packages available on long or short term
lease contracts. The equipment is available globally but supported at a local level which allows Cyclotech to assist the customer in the design, integration, operation and manning of these temporary systems.
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You are proposing to install a Seawater coarse filter and have a space or weight constraint;
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You are proposing to install a Dual Media filter and have a space or weight constraint;
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You have an emulsion problem which you suspect is causing a colliodal emulsion stability problem;
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You have a fine silt production problem and wish to remove it from your process.
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