HRS to supply mechanical vapour recompression for EU-funded ZLD project
HRS Heat Exchangers has been awarded an order for the design, manufacture and installation of a Mechanical Vapour Recompression (MVR) Evaporation System for the LIFE Desirows consortium, which is demonstrating a circular economy zero liquid discharge (ZLD) project to improve water quality in the Murcia region of Spain.
LIFE Desirows is an EU-funded research project which is studying a way of extracting useful salts and products from the brines which are generated by reverse osmosis (RO) technology which is used to create irrigation water.
If not treated properly, these brines contribute to the level of nitrates being discharged into water courses in the region which then causes a deterioration in water quality. This deterioration of water quality has had a negative effect on the tourism industry, which together with agriculture is the main economic driver in the region of Murcia.
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LIFE Desirows Consortium
To find an urgent solution to the issue, a consortium of companies has teamed up with the Polytechnic University of Cartagena (UPCT) to investigate a treatment solution for the agricultural brines which present an environmental challenge in the Mar Menor and Mediterranean areas around Murcia.
The consortium has developed a process which removes nutrients and separates different salts from the brine, so that they can be used as fertilisers. Firstly, a double RO process generates a second brine which then goes through a denitrification and chemical precipitation process which removes the nutrients and the salts. The resulting solution is then thermally concentrated using a cooling tower and mechanical vapour compression to produce a saturated solution.
Finally, the precipitated salts are removed from this saturated solution using Wind-Aided Intensified Evaporation, providing a true zero liquid discharge solution which converts the environmentally unfriendly brine into clean water for irrigation, fertiliser and salts for industrial use. The technology has potential applications in a range of situations, but in the LIFE Desirows project, it prevents the leakage of unwanted substances from agriculture into water courses.
The processes are powered by renewable electrical sources, including solar PV and biomass, further improves the project’s environmental credentials, and the project is by the LIFE Program of the European Union.
HRS MVR evaporation solution
HRS is providing the consortium with a forced recirculation evaporator driven by mechanical vapour recompression (MVR). MVR evaporation is one of the most economical ways of concentrating waste streams and doesn’t require a thermal energy source. The electrical energy needed to drive the MVR compressor is supplied photovoltaic solar panels, as using renewable energy is one of the pillars of the LIFE Desirows project.
The evaporation module uses HRS corrugated tube technology which is ideal for the concentration of brine. The corrugated tubes generate extra product turbulence, which provides enhanced heat transfer and also delays heat exchanger fouling. Both of which are crucial features when dealing with challenging products such as brines and waste waters.
Tomas Stiebe, one of HRS’s evaporation experts commented: “HRS is delighted to contribute with a technical solution for this environmental challenge. With both our office and manufacturing facility being in the Murcia region. As a company with local facilities, we are aware of the environmental problems suffered in the Mar Menor and are delighted to be able to try to help solve them.”
“Product trials were conducted with the Polytechnic University of Cartagena to investigate the evaporation process and ensue the right choice of technology. HRS have delivered several zero liquid discharge systems to customers in Spain, giving us the confidence to solve the concentration part of the LIFE Desirows system with our corrugated tube MVR evaporator.”
HRS Heat Exchangers
- 01923 232 335
- info@uk.hrs-he.com
- http://www.hrs-heatexchangers.com
- 3 Abloy House Hatters Lane Watford Hertfordshire WD18 8AJ GB
About us
HRS Heat Exchangers operates at the forefront of thermal technology, offering innovative and effective heat transfer products worldwide, focusing on managing energy efficiently. Providing a range of heat exchangers, modules and complete processing systems that help you to optimise production, make the most of raw materials, whilst reducing energy consumption, waste and emissions. With 40 years’ experience specialising in design and manufacture of an extensive range of turnkey systems and components incorporating our corrugated tube and scraped surface heat exchanger technology, in compliance with the Global Standards. HRS has a global network of offices: UK, Spain, USA, Malaysia, Australia, India, Russia and Mexico; with manufacturing plants in the UK, India and Spain. Our patented and proven heat transfer technologies, combined with our knowledge make it possible to offer best in class solutions for a wide range of industries and applications.
What we do in a nutshell
HRS Heat Exchangers operates at the forefront of thermal technology, offering innovative and effective heat transfer products worldwide, focusing on managing energy efficiently.
Where we supply to
UK Ireland, Europe, Asia, Australia, South America, North America
