Water Treatment

 

Boiler Feed Water Treatment

Multi-layer filter for particle removal upstream of ion exchanger
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Multi-layer filter for particle removal upstream of ion exchanger
Multi-layer filter for particle removal upstream of ion exchanger

In the energy and process engineering industries, high-quality boiler feed water is crucial for the reliable operation of steam generators. Eisenmann offers a wide range of water treatment systems.

Treating boiler feed water usually involves a variety of processes in different combinations. This includes pretreatment of raw water, complete desalination, condensate return treatment, and if required, treatment of resulting waste water.

Desalination

For the desalination stage, we deploy reverse osmosis systems and ion exchangers. We primarily implement reverse osmosis where the raw water has a high salt content and regeneration chemicals are not advisable. If salt content is low, ion exchangers are generally a more cost-effective option. To ensure the highest quality boiler feed water, subsequent treatment is essential, through mixed-bed ion exchangers or electrodeionisation.

Treatment of waste water from boiler feed water treatment

Eisenmann offers a wide variety of options to further treat any resulting waste water.
We can provide concentration systems with evaporators.

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Process Water Treatment

Process water treatment via ion exchange
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Process water treatment via ion exchange Process water treatment via ion exchange

Every process requires suitable process water.
For example, softened water for heating, partially desalinated water
for rinsing and high-purity water for rinsing in the semiconductor industry.

Eisenmann offers a wide range of treatment systems. The treatment of water for use as process water is determined by the raw water quality and the processes.

This includes all filtration processes: from multi-layer filtration to multi-stage reverse osmosis filters; from simple softening systems based on ion exchangers to complex systems for the selective removal of individual ions;
and from pipe flocculation reactors to comprehensive sorption processes

Further Information

 

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Seawater Desalination

Treatment of brackish water via reverse osmosis
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Treatment of brackish water via reverse osmosis
Treatment of brackish water via reverse osmosis

Desalination of brackish and seawater offers a secure supply of drinking water, across the globe. Eisenmann has the right solution for your needs.

Treatment of brackish and seawater encompasses the proper withdrawal of water, the right pretreatment, correct configuration of the membrane stage and effective after-treatment before use. Seawater can be withdrawn directly or through a well. Multi-layer filters, with a suitable dosage of chemicals, are ideal for pretreatment. High-volume flows make deployment of an energy recovery device a cost-effective option; the residual pressure of the concentrate is used to increase membrane feed flow.

Eisenmann can provide everything from individual components to complete turnkey plants

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Water Recycling

Water recycling using an evaporator
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Water recycling using an evaporator
Water recycling using an evaporator

Prevention and reutilization are preferable to disposal. To this end, water recycling technologies should take priority over waste water treatment. With our extensive experience in a wide variety of production processes, Eisenmann can take into account ways of saving and recycling water at the planning stage.

For example, deploying an evaporator enables a pretreatment system for a paint finishing line to be operated without creating waste water. That means a number of regulatory requirements no longer apply.

Another example with both environmental and cost benefits is using a two-stage membrane process to recycle printing inks. The wash water used in this process is treated so that the printing ink can be recovered and the resulting water can be discharged without difficulty.

Membrane processes involve ultrafiltration followed by nanofiltration. Ultrafiltration removes the pigments. The resulting solids remain in circulation until the necessary viscosity for the printing process has been reached inside the concentrate tank. Subsequent nanofiltration removes the remaining organic substances and heavy metals, so that the pure nanofiltrate can be disposed of or reused.

This example shows that, with a combination of resource recovery and waste water treatment, environmental technology offer a rapid return on investment

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