Making changes to processes can bring about improvements, but is not without risk. Matt Hale, International sales & marketing director, HRS Heat Exchangers, says trial units can reduce that risk


here is a lot of truth to the old saying ‘seeing is believing’. There’s nothing

like seeing the results with your own eyes in order to tell whether or not a trial has been successful; if new equipment delivers everything that you hoped for; or if changes to production have delivered the expected improvements in quality. Trials are also invaluable for assessing product quality parameters, testing system designs and environmental performance, consumer research, or producing samples for chemical or microbial analysis, or even assessing the feasibility of a particular process. Due to the complexity of modern waste

treatment and environmental processes, it can be hard to assess multiple options and the processing of small batches. That’s why HRS has developed a range of portable and trial units, which allow clients to test a variety of equipment including tubular and scraped surface heat exchangers and pilot evaporation plants. If you already have a successful

treatment process, making changes can provide cost savings or other financial and

at the client’s own facility. These types of trial not only help to inform the design of the heat exchanger, but can also provide buyers and users with the confidence to invest in, and install, new equipment. In today’s competitive market, everyone

is looking for the next trend. However, the environmental performance of businesses is now often as important as its products themselves, and so staying up to date with the latest waste treatment techniques and infrastructure is crucial. In some markets, trials are required for

processes to be approved prior to licensing; for example, where wastewater streams are discharged to the environment. Trials also allow potential treatment issues or glitches to be identified and rectified before investing in a full-size facility, and can even inform assessments such as Hazard Analysis and Critical Control Points (HACCP) before full-scale installation. Buying dedicated equipment for trials

environmental improvements; but it is not without risks. Before making wholesale changes – for example, altering the temperature and time regimes for an evaporation process – it can be reassuring to find out what the effect on both the end material and the overall process will be. After all, nobody wants to invest in major changes to production equipment which then have to be reversed. One way to do this with heat exchangers

is with a trial unit for in situ testing of equipment, or by performing trials and analysis on materials and waste streams

It is important to understand the effect new equipment or processes may have

can be prohibitively expensive. However, good equipment which is flexible enough to be used for a variety of trial and production purposes can quickly repay the initial investment. To facilitate this type of trial, HRS has produced a range of trial-size equipment with the reliability and performance of their full-size counterparts, but which have been specifically designed to be easily portable between sites. The modular nature of many HRS heat

Matt Hale, sales & marketing director


Babcock Wanson has provided animal by-products processor and recycler, P Waddington & Co with an efficient solution for odour abatement and process steam production at its site in Bradford, West Yorkshire. The company recycles all animal by-products into energy and biofuels through its tallow, meat and bonemeal products. To minimise odour from the process, Babcock Wanson has supplied a Deodorising Oxidiser, specifically designed to abate odours and vapour emissions generated by the production process. Process off-gases are oxidised at a temperature of 850-900°C within the Oxidiser’s chamber with a dwell

time of approximately 1.0 second, before being discharged to the atmosphere as a harmless and odour free exhaust. The Deodorising Oxidisers have an overall thermal efficiency of circa 85% which is in part achieved through the use of a waste heat steam boiler which recovers valuable high grade energy from the flue gas stream and feeds it back into the process. Furthermore, the tallow produced from the on-site processing can be used as biofuel for the site steam boilers, or is sent for further re-processing into bio-fuels. The oxidiser, has the potential to offer P Waddington & Co considerable energy savings. Unlike standard Thermal Oxidisers, Deodorising Oxidisers are tailored to meet the particular

requirements of the rendering process. Managing director, Mark Waddington, said: “This is our second oxidiser that we have purchased from Babcock Wanson. The first oxidiser performed exactly the way they said that it would and we fully expect this to be no different. We chose Babcock Wanson because of the past history that we have with them and because it was important that the project went with as few problems as possible. We weren’t confident that the other suppliers could deliver the project as well as Babcock Wanson. Babcock Wanson’s service has been first class.” Babcock Wanson

exchangers means they can also provide trial units of many heat exchanger models. Recent examples include using trial versions of the HRS R Series of scraped surface heat exchangers. In each case, mounting the trial heat exchanger and relevant controls on pallets or a purpose-designed suitable skid frame not only aids delivery and installation of the equipment, but makes it easier to move around production facilities, for example to investigate the use of different lines and possible installation locations. Evaporation is often a key part of waste

stream processing and HRS has trial evaporator units available which can be configured for a range of waste treatment applications. Investing in any new processing

equipment not only represents a significant capital outlay, but results in inevitable disruption during installation, however by trialling equipment prior to investment both users and manufacturers can be sure that the best solution has been chosen.

HRS Heat Exchangers

32 NOVEMBER 2019 | PROCESS & CONTROL 

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