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Evaporators
HRS ’ s largest ever evaporator cleans up
HRS Heat Exchangers has recently completed construction of its largest ever evaporator at its production facility in Murcia , Spain
Outside an industrial unit on the outskirts of Lorguí in south-east Spain , a large industrial structure has slowly risen over the last year . In fact , the 16m unit is the largest evaporation unit ever constructed by HRS Heat Exchangers and will soon be dismantled for transport and installation at its operating site . In this piece , Matt Hale , International Sales & Marketing Director at HRS explains the purpose of the unit , and how the company has tackled this unique challenge .
All text and images courtesy of HRS Heat Exchangers
The combined evaporator and crystalliser , which will have a total capacity of nine tonnes per hour once operational , has a footprint of 135 m 2 and is designed to treat concentrated waste brine produced by an on-site reverse osmosis plant resulting in the production of distillate – which is returned as process water – and crystallised waste . As such the HRS evaporator unit will form part of an upgraded zero liquid discharge ( ZLD ) system for treating the client ’ s challenging waste stream and meeting local environmental regulations . have significant disadvantages and often fail to protect local environments from the pollution and damage caused by hazardous wastes . In general terms , zero liquid discharge ( ZLD ) is a liquid waste stream treatment which involves transforming liquid waste streams from industrial plants into clean water , which can be reused in the process , together with the minimum quantity unt of solid residues , which often include valuable by-products that can be sold or reused . The effective design of any ZLD system is dependent on the correct analysis of the waste stream , making it essential to have an accurate analysis of composition , flow rates , chemistry , etc . Without this , any designed solution will fail to deliver the required results . ZLD systems often begin with a pre-treatment phase ( in this case reverse osmosis ) followed by an evaporation phase to remove most of the water , and a further concentration or crystallisation phase to produce the final solid residue . Heat exchangers play a crucial role in reducing the running costs of a ZLD system utilising surplus and regenerated heat and minimising the amount of fresh energy required by the process .
Matt Hale , International Sales & Marketing Director , HRS Heat Exchangers
Zero liquid discharge Historically , hazardous wastes have been treated by a number of different physical , thermal , chemical and biological methods , including precipitation , high temperature incineration and even burial in specialist secure sites . However , many of these treatment methods
New HRS evaporator system The new system , which has been manufactured for an un-named Spanish client operating in the heavy industry sector , has a total weight of 54 tonnes and covers a total area ( across all four operating levels ) of 420 m 2 . In total it includes 19 tanks , 15 heat exchangers of different sizes , and
26 Heat Exchanger World May 2023 www . heat-exchanger-world . com