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Showing all 5 results

What is the purpose of a wet separator?

A wet separator is also called a gas scrubber. It is a dust extractor with which harmful substances in the air or gas can be bound and separated. For this purpose, the gas flow is brought into contact with a liquid.

The components contained in the gas, such as dust or pollutants, then pass into the liquid stream. You can use water, another solvent or a suspension such as milk of lime as the washing liquid for the cleaning devices.

How a wet separator works

The function of a wet separator is based on the absorption of pollutants by the liquid used. In order to ensure that the pollutant particles pass into the liquid substance as effectively as possible, it is important that a large liquid surface is created. In addition, the contact time between the gas and the liquid should be as long as possible.

This can be achieved, for example, by

  • Spraying processes,
  • bubble formation,
  • drop generation
  • or sprinkling can be achieved.

All these processes require sufficient energy. In addition, a high concentration level of the substances to be removed in the intermediate phase increases efficiency. The droplets produced during the process are usually larger than the particles to be absorbed and can be easily separated by the so-called droplet separator at the device outlet.

Since the principle of the wet separator is based on the absorption of gases, heat can be generated during the process. The design of the scrubber must take this into account and should also take into account the vapour pressure of the scrubbing liquid.

Wet separators in the range

The wet separator systems at can be divided into two major product classes: Here, the mobility of the device is the most important factor. We distinguish between stationary and mobile systems.

Mobile wet separators from ESTA

Depending on your requirements or the area of application, ESTA‘s mobile units offer maximum flexibility. They are the all-rounders among the wet separators. Their optimised roller system makes them easy to move from one area to another. This gives your staff the opportunity to react very quickly to different boundary conditions. Mobile units are particularly advantageous when the application changes regularly.

Stationary wet separators from ESTA

Stationary systems are used for individual extraction or as a central extraction system with several extraction points. They are the specialists among the extraction units. The separation efficiency of the systems is optimised for maximum efficiency and is therefore significantly more specific than with mobile extraction units.

Therefore, for a specific application, a stationary system is the tool of choice. However, the systems are firmly anchored to a working area and therefore less flexible in their use. In our portfolio we have a range of versatile stationary wet separators from ESTA ready for you.

Wet or dry separator?

The decision between wet and dry separators depends on many factors. First of all, the substances to be removed are decisive. In addition, general conditions such as costs, maintenance effort, flexibility and installation situation play a major role. The most important aspects of dry and wet separators are compared below.

Areas of application for dry separators

A dry separator is usually used when dry, sticky or combustible dust has to be separated. This is the case, for example, in industrial grinding and polishing processes, as well as in metal processing and in the transfer and mixing of dusty solids. Dry separators have the following advantages and disadvantages compared to wet separators:

Advantages and disadvantages of the dry separator compared to the wet separator

Advantages Disadvantages
Lower costs Higher fire risk
Higher flexibility due to different discharge options and safety systems Higher follow-up costs due to wear parts (e.g. filters)
Floodplain installation possible Can only be used for aluminium rooms at high expense
Easier handling
Very high efficiency
Easy dust disposal

Applications for wet separators

Wet separators are preferred for processes with a risk of flying sparks, for the removal of aluminium dust and for explosive and humid rooms. The devices have the following advantages and disadvantages compared to dry separators:

Advantages and disadvantages of the wet separator compared to the dry separator

Advantages Disadvantages
Suitable for aluminium tube Risk of rust on components
Very low fire risk Higher costs for outdoor installation due to necessary freeze protection
Low follow-up costs due to wear Lower efficiency
Less flexibility
More complex handling and dust disposal

Obligations for the operation of a wet separator according to the 42nd BImSchV

Since wet separators often work with water-based washing liquids, their operators are subject to the obligations of the 42nd Ordinance on the Implementation of Federal Immission Control (BImSchV) concerning evaporative cooling systems, cooling towers and similar systems. The aim of the ordinance is to prevent contamination of service water by microorganisms (e.g. legionella) and to prevent contaminated aerosols from entering the air and causing infections.

As an operator, you must fulfil the following obligations:

  • Obligation to notify all installations and their modifications
  • Preparation of a hazard assessment
  • Keeping an operating manual
  • Regular testing of the water for legionella
  • Documentation of sampling
  • Establishment of reference values for germ contamination
  • Inspection of the system by an expert every 5 years.

Wet separator or dry separator? Our technical advisors can help!

Are you interested in purchasing a wet separator and would like to expand your area with it? Our experienced experts are at your disposal around the clock. They will be happy to advise you and provide you with competent and comprehensive support in selecting the right equipment for your requirements. You can reach our team by phone at +49 30 2096579 00 or by e-mail at [email protected]