Successful Commissioning of a Self-cleaning Evaporator

Another successful commissioning of a self-cleaning fluidized bed heat exchanger – the KLAREN system – in a waste water evaporation plant.The heat exchanger converted to the KLAREN system is the 1st stage of a 4-effect evaporator train to treat waste water from a plant producing dyes for textiles. The heat exchanger earlier experienced severe fouling by salts of calcium, magnesium and silica.

Due to fouling the evaporation capacity of the plant reduced to 50% in 20 days and the plant required cleaning of tubes. Subsequent to the commissioning with Klaren system the plant is operating at design evaporation capacity under stable conditions of the fluidized bed. With the KLAREN system, we make evaporator plants more sustainable.

For more information, please contact us

Business Benefit Self-Cleaning Heat Exchanger

What is the benefit of a self-cleaning heat exchanger for an evaporator?After the first period of operation we can answer this question. The answer comes from the graph that is added to this post. Previous experience of the plant showed that because of fouling of the heat exchanger tubes, the evaporation capacity of the plant reduced with 50% within 12 days of operation. After the retrofit to our technology, using a fluidized bed with cleaning particles, the evaporation capacity remained constant.Before the conversion the average production capacity was only 75% of design. So, with our technology the client has gained 33% production capacity. The benefit would be even greater in case the production loss due to the down-time for cleaning (can take between 2 and 5 days) would be considered as well.When comparing the investment for adding 33% capacity using conventional technology with the investment for a retrofit into the self-cleaning heat exchanger, a decision can be easily made. The investment for a retrofit is a factor of 3 smaller.

Self-cleaning Evaporator Pilot Unit for the Concentration of Digestate

We have successfully operated our self-cleaning evaporator pilot unit for treating digestate from a biogas plant in Germany. The aim was reducing the volume of the Digestate without facing fouling problems and maintaining high heat transfer coefficients with this viscous fluid.

Next year the pilot unit will become available for other evaporation cases.

Order for 3 Evaporator Plants

Shachi Engineering Pvt. Ltd. (Pune), our partner in India, has been granted the order for 3 new waste water treatment plants for the dye-making industry. The plants apply multi-stage evaporation of which the first and second stage will be configured with the self-cleaning technology of Klaren International. The design of the plant has been optimized for steam efficiency and to have a compact design. The order was granted after a successful project in which one of the existing evaporators of this client was revamped into the self-cleaning system and showed constant evaporation where previously fouling was an important issue.

Fluidized bed technology for carbon capture process

Klaren International has worked together with Sustainable Energy Solutions (SES) to experimentally test the use of the fluidized bed heat exchanger technology as a part of SES’ innovative Cryogenic Carbon Capture process.

SES develops innovative solutions to sustainability problems within the energy industry. Their Cryogenic Carbon Capture™ (CCC) technology eliminates most emissions from fossil fuels. This CCC technology is projected to cost half as much as alternatives.

Fouling Conference 2017, Madrid

In the week of June 12th to June 16th the 2017 Fouling Conference was held in Madrid. At the fouling conference, it was again confirmed that fouling is a big problem in industry. Both researchers and industry are working on methods to mitigate it. Marco van Beek, CTO of Klaren International, presented two papers with applications based on the self-cleaning fluidized bed heat exchanger technology:

  1. Fluidized bed heat exchangers for the evaporation of waste waters: design advantages and operational experiences
  2. Horizontal shell side fluidized bed heat exchanger, design considerations and experiences from a pilot unit

The papers will be officially published after peer review by the technical committee Heat Exchanger and Fouling Conference 2017.

Please contact us for more information

ICCI 2017 | 23rd International Energy & Environment Fair & Conference in Istanbul (Turkey)

Klaren International attends the ICCI 2017 | 23rd International Energy & Environment Fair & Conference in Istanbul (Turkey)

From 3-5 May 2017 we attend together with our Turkish business partner Sistemas the ICCI 2017 | 23rd International Energy & Environment Fair & Conference in the Istanbul Expo Center (Turkey). We have a demo unit in the booth to show and explain the working principle of the self-cleaning heat exchanger technology. Please visit us. You can find us at booth D108.


Contact us at:

Klaren International BV
Hanzeweg 35N
3771 NG Barneveld
The Netherlands

Phone: +31 85 27 34 834

Any questions?

We would be happy to answer them.

+31 85 27 34 834