Oil Mist Eliminators for the extraction and filtration of oil mist.

contec Oil Mist Separators (COMS)

 
contec Oil Mist Separators (COMS)
/Oil Mist Eliminators for the extraction and filtration of oil mist are used for large-scale compressors, gas and steam turbines, generators and other equipment with oil systems to ensure clean, oil-free exhaust air. 99.98% of solid and liquid particles and aerosols down to 0.1 micron are removed and high-quality oil can be regained.

contec Oil Mist Separators/Oil Mist Eliminators are equipped with a side channel blower that generates adjustable negative pressure in the oil systems. This prevents the leakage of oil mist from the bearings, shaft guide and crankshaft ventilation systems. As the filter elements have a long service life and an automatic oil recycling system, they require little maintenance.

The core of the contec Oil Mist Separators/Oil Mist Eliminators are the glass fiber filter elements developed especially for these applications. The two-layer design with integrated reinforcement fibers optimizes the coalescence effect and ensure a constantly high level of oil separation. The degree of efficiency is 99,98% at a droplet size of 0.1 micron, which means that the exhaust air is far cleaner than that required by German TA regulations of clean air.

For that reason contec Oil Mist Separators have been awarded with the Environmental Technology Prize for 1990. Due to their very compact design, contec Oil Mist Separators are also easy to use under all difficult or restricted spatial conditions.

Installation of the Oil Mist Separators (COMS)/Oil Mist Eliminators on:

  • Lube oil systems (LOS) of gas and steam turbines
  • Fluid grinding plants
  • Vacuum pumps
  • Spray pattern test bench
  • Rotating machines
  • Compressors
  • Large-scale compressors
  • Crankdrives
  • HE fluid grinding plants for diesel injection components

Technical task of the Oil Mist Separators (COMS)/Oil Mist Eliminators:

  • Filtering, separation and regaining high-quality lubrication oil including all its additives

Operational task of the Oil Mist Separators (COMS)/Oil Mist Eliminators:

  • Avoiding oil leakage (at bearings etc.) by creating a permanent slight negative pressure in the lube oil system

Global/environmental task of the Oil Mist Separators (COMS)/Oil Mist Eliminators:

  • High-efficiency filters prevent the emission of oil mist into the atmosphere
  • Protecting the environment by reducing oil mist emission down to < 3-8 mg/m³, cleaner than the German TA regulations of clean air and long­term protection of the environment

Advantages of the Oil Mist Separators (COMS)/Oil Mist Eliminators:

 
Various options of the Oil Mist Separators (COMS)/Oil Mist Eliminators:

Explosion-proof versions/ATEX

  • Explosionsgeschützte Varianten/ATEXThe complete Contec Oil Mist Separator is certified in compliance with EC directive 94/9/EG (ATEX 100a) and can be operated in hazardous areas
  • Up-to-date in terms of state of the art safety technology
  • Suitable for application in explosive gas atmospheres category 2 and 3 (group II)
  • If requested taylor-made configuration in accordance with the ATEX directives for zone 1 (explosive atmospheres are likely to occur) or zone 2 (seldom and short-term explosive atmospheres) group IIC (propane, ethylene, hydrogen)
  • Drives Ex-pressure resistant, VIK, special voltages etc.

Redundant Series

  • Redundante VariantenRedundant motor/blower unit on bracket or frame construction
  • Motor/blower units are controlled separately by hand and check valves
  • Motor/blower unit can be dismantled easily due to hard valves before and after blower
  • Easy maintenance due to laterally reversed construction of motor/blower units

Bypass

  • BypassComplete bypass with integrated check valve
  • Compact integration of a bypass system that is normally installed separately to the OMS/OME
  • „Emergency“-bypass to avoid over pressure in the LOS

Bypass of external air

  • FremdluftumgehungHand valve for admixing system-internal, purified exhaust air to control the negative pressure
  • Suitable for applications in Zone 1 hazardous areas or in areas with very dirty or polluted environmental air

Additional micro filter head piece

  • Zweite FilterstufeAdditional downstream air filter cell H11 for aerosol-free exhaust
  • Reduction of oil aerosols in the exhaust air to less than 2 mg/m³

Series without an blower

  • Baureihe ohne GebläseFilter system without motor/blower unit
  • Filtration and separation of oil mist for lubrication systems with sufficient positive pressure

 

Most important

Residual oil content below 0.1 mg/m³ - separation degree of 99.98% and no particles between 0.2 µm and 0.9 µm in clean gas.

The exhaust air filtered in this manner is absolutely dry and clean from a technical point of view. It can remain inside the plant without any risk what-so ever. Complex, expensive exhaust pipe systems have, therefore, become a thing of the past.

The oil which has been separated is directly absolutely clean. It can, therefore, be lead back to the oil tank by means of the oil drainage system. Thanks to their extremely compact design, contec Oil Mist Separators (COMS)/Oil Mist Eliminators are also suitable for use in difficult installation positions. The long service life span of the filter elements (at least one year) and the automatic recirculation of the oil mean that the system requires little maintenance. Thanks to the quick-action fasteners on the cover, filter elements are easy to replace.

contec Oil Mist Separators (COMS)/Oil Mist Eliminators essentially comprise of a side-channel blower and the filter housing containing the filter elements. The side-channel blower causes negative pressure in the filter housing, into which the air containing oil mist is sucked. The air flows through the inlet pillar tube into the cavity in the filter housing where it is distributed to the filter elements. Here the fine oil droplets in the air are retained. They are collected in the element and the air current carries them to the outer surface.

The filter elements used for this purpose have been designed especially for cleaning exhaust air. Since the filter elements comprise of several layers, oil mist which has already been extracted, is prevented from being blown back through the elements.

The oil separated by the filter elements runs down along the outer surface of the elements to the bottom of the housing. It is collected in the ring space around the base of the filters. From here the purified oil is transported to the oil reservoir through the oil outlet and the oil hose connected.

The inorganic composition of the filter elements is fully inert to all lubricating matter and is virtually resistant to all of the chemicals in the air. It is not the elements themselves but the side-channel blower which determines the highest permissible operating temperature for the filter unit.

The longer the filter elements are in operation, the more they become saturated with particles of solid matter. The pores become blocked and as a result the pressure resistance of the filters increases the longer they are in operation. For this reason the blowers of all contec Oil Mist Separators (COMS)/Oil Mist Eliminators have been designed that the required suction power is still available in the case of a relatively high degree of pressure resistance. This means that a long useful life is guaranteed.

The suction T-shaped part of the blower is fitted with a manually operated valve and an air inlet filter. Should, under certain circumstances, the negative pressure produced by the blower be too low, the manual valve can be opened to enable air to flow in from the outside. The degree of negative pressure produced by the blower can be read on the negative pressure gauge.

  1. Entry of air containing oil mist
  2. Layer of fine filter (internal filter layer)
  3. Drainage layer, outer filter layer
  4. Discharge of oil-free, clean air
  5. Oil droplets are drained off

The Problem

This applies particularly to large workshops and factories in which rotating machines such as wheel mechanisms, turbines, turbo units or compressors for producing energy or compressed air are used. This has prompted the government to stipulate maximum pollution levels for these plants. With contec Oil Mist Separators (COMS)/Oil Mist Eliminators these levels can be reliably maintained. The separators fulfil all statutory requirements and the air quality produced is far better than that required by German TA regulations for clean air.

High-power filters with glassfibre fleece elements have proven their worth when it comes to separating oil mist out of the exhaust air produced by rotating machines. The requirement, however, is that the system pressure present or the excess pressure produced by the machine itself must be sufficient to overcome the pressure loss of the filter. This is not the case with many machines, in certain individual applications or under unfavorable operating conditions. For this reason exhaust air with a high concentration of oil is frequently discharged into the atmosphere through the roof of factories by means of complex, expensive pipe systems. The problem is shifted but not solved.

The Solution

The solution to the problem is a blower which extracts the air containing oil mist and discharges it through the filter. This blower should always be installed on the clean side, i.e. behind the filter. This will help to avoid dirt and malfunctioning.

Side-channel blowers have proved to be very successful in this case. They work reliably, have an optimal flow/pressure ratio and are relatively inexpensive. The appropriate filter elements have been designed especially for this application. At degree of effectiveness of 99,98% with a droplet size of 0,1μ accounts the pressure resistance at around 60 m bar.

The Description

contec Oil Mist Separators (COMS)/Oil Mist Eliminators essentially comprise of a side-channel blower and the filter housing containing the filter elements. The side-channel blower causes negative pressure in the filter housing, into which the air containing oil mist is sucked. The air flows through the inlet pillar tube into the cavity in the filter housing where it is distributed to the filter elements.

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Contact

contec GmbH Industrieausrüstungen
Heideweg 24
53604 Bad Honnef
Germany

P. +49 (0)2224 9893-0
F. +49 (0)2224 9893-20