Experts in air filtration

Introducing our rebranded product range for 2021

Over the years, we’ve carefully developed a great range of products, and we’re proud to announce that we have brought them all together, for the first time, under our new product range.

Our products meet exacting standards, and are in daily use across the world. From filters of all types, all the way up to complex silos, and everything in-between, we've likely got a product that fits your business or project requirements.

Our range includes…

  • cleanPULSE filters
  • cleanDOSE sorbent dispensing systems
  • cleanSORB silos
  • cleanPAC dosing
  • cleanNOx skids
  • cleanSPARK arrestor boxes

At the heart of almost everything we do is a filter. Over the years we have developed a range of filters that you can trust. Under our cleanPULSE brand are different filter types, all of which take out harmful particles from the environment.

We have:

They are named cleanPULSE, because they CLEAN the harmful emissions from the environment, and have a reverse jet PULSE cleaning mechanism.

Our cleanDOSE sorbent dispensing systems are based on dosing reagents using bulk bags.  They all have feeders like the CleanPAC systems, but are larger to accommodate a bulk bag and we have three types:

CleanDOSE Base – here the bulk bag is lifted by forklift truck onto a membrane.  The bulk bag bottom spout is opened via a door.  Periodic agitation may be required.

CleanDOSE Lid – this version has the capacity to take more than one bulk bag full and has a closing lid.  This is a tidier solution since no further agitation should be needed and it protects the dry powder.  A forklift truck is required to lift the bag.

CleanDOSE Lift – this is the same as the lid version but uses an overhead frame and hoist to lift a bulk bag into the dosing hopper.  No forklift is required, only a pallet truck.

Our in house designed cleanNOx skids are designed to reduce the NO and NO2 in the gas stream to meet the requirements of the Industrial Emissions Directive (was the Waste Incineration Directive).

Also known as a Selective Non-Catalytic Reduction system (SNCR) solution, these systems are used to remove harmful oxides of nitrogen from hot flue gases by reaction with urea or ammonia solutions. Filter designs use urea because of the relative minimal COSHH issues when compared to handing ammonia.  The urea solution is injected inside combustion chamber outlets or secondary (dwell) chambers and are mainly used in power plants that burn biomass or municipal or clinical waste.

NOx injection can be a fine art as there are certain limitations required for optimal dosing these are:

  • Gas temperature needs to be between 790°C - 1050°C
  • Ideally 850°C to 950°C for optimum efficiencies
  • Spray pattern and duct distribution
  • Lance design

We offer two different types of cleanNOx skids which are categorised as a ‘basic’ skid which uses urea solution in IBC container and needs to be integrated into a clients controls system, or the full ‘prill ‘skid which has its own control system and uses pellets of prill, mixing with de-mineralised or towns water on site.

PAC Dosing is the process of introducing an amount of powdered activated carbon (PAC) to reduce the heavy metals, dioxins and furans in the gas stream that sodium bicarbonate or lime cannot remove.

By Accurately controlling the ‘dose rate’ of activate carbon you can:

  • Ensure there is enough PAC to provide effective treatment.
  • Avoid unnecessary wastage of PAC

cleanPAC has been developed to offer you a practical solution to PAC Dosing. Our range includes:

To control quality and design flexibility, we have developed our own range of silos which as well as being used for projects, are now available as a standalone product.

Silos are primarily used by our customers as storage for the sorbent injection for acid reduction (sodium bicarbonate, hydrated lime) and for the collection of sorbent and ash from the bag filter (CleanPulse).

We offer:

  • Welded silos
  • Panelled (bolted) silos
  • Silo accessories

Our silos can be painted exactly to your specification and colour - virtually any special requirements can be catered for. If further feeding systems are required these too can be tailor-made to suit your brief.

Much of our work at Filter Designs operates on processes such as aluminium and glass furnaces, pyrolysis plants and waste to energy systems.  High temperatures of up to 1200ᵒC mixed with impurities in the process and/or process variables can lead to sparks exiting the process into our gas treatment plant.

Typically, cyclones are used pre-filter when a high dust loading is anticipated.  However, our filter (see CleanPulse) has an inlet distribution section making it suitable for high dust loading without the need for a cyclone.  Furthermore, cyclones offer little impact surface and no physical barrier for foreign materials, such as a rag, piece of plastic film or other foreign body.

Our cleanSPARK arrestor boxes reduce the risk of fire in the bag filter by knocking out material which is alight in the airstream before they can enter the dust collection unit.

CLICK HERE to find out more about our whole product range.

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Get in touch

T: 01858 419 104

E: [email protected]

Our recent Projects

We were contracted to provide 2 small Ceramic filters suitable for a small volume but with a design maximum temperature of 600°C. In addition the filters will be handling a syngas which cannot be mixed with oxygen so an alternative to compressed air would need to be used for the ‘Cleanpulse’ cleaning of the 25 Ceramic element in each of these CPC78 filters. In addition dosing of small amounts of a re-agent is required so the client also opted for a ‘Cleandose’ 25kg bag skid. Find out more about Project CAD below.

Project SRCL HH - GSA (Gas Suspension Absorber) Reactor Tower

Project BCI - Bag Filter, Gas Suspension Absorber, Reagent Dosing for a Challenging Carbon Process

Filter Designs Ltd. 2020 - Website by 1PCS