Particles & dust
Mass loading, particle size, abrasiveness, stickiness, hygroscopic behaviour and residue characteristics.
COOLING • NEUTRALISATION • FILTRATION • ABATEMENT
Flue-gas treatment & filtration for crematoria, incinerators and industrial thermal plants.
CFI Systems designs and integrates complete flue-gas treatment lines combining gas cooling, reagent injection, pollutant abatement, filtration, extraction, instrumentation, emissions monitoring and automation.
CFI Systems develops flue-gas treatment solutions for crematoria, industrial incinerators and other thermal-process plants. For UK crematoria, PG5/2(25), mercury abatement and the 4 December 2029 transition are additional drivers for filtration, retrofit and modernisation projects.
From furnace to stack
01Characterise the flue gas
02Cool & condition
03Neutralise & adsorb pollutants
04Filter & extract
05Monitor & control
Target pollutantsDust, HCl, HF, SO₂, Hg, organics and other species
Treatment technologiesBaghouse, ceramics, dry/semi-dry, scrubbers, WESP
New build & retrofitComplete lines or targeted modernisation
Integrated processCooling, reagents, filtration, extraction and controls
Characterisation
Start with the real flue gas, not with a catalogue filter.
Flue-gas treatment must be sized around flow, temperature, dust loading, chemistry, humidity, peak loads, transient operation and the emission requirements applicable to the site.
HCl, HF, SO₂
Reagent type, stoichiometry, temperature window, contact time and dosing strategy.
Mercury & volatile metals
Adsorption, condensation and capture strategy according to process conditions and target performance.
Dioxins & organics
Controlled cooling, suitable sorbents and coherent upstream combustion or afterburning.
UK CREMATORIA • PG5/2(25)
Flue-gas treatment is a central part of the 2029 upgrade strategy.
The current UK Process Guidance Note PG5/2(25) covers crematoria and sets out emission limits, monitoring requirements, control measures and Best Available Techniques.
Under the current guidance, from 4 December 2029 existing cremators must comply with the emission limit values for new cremators. The guidance also gives flue-gas treatment and mercury abatement a central role in the transition of the existing cremator fleet.
For CFI Systems, this means treating the cremator, cooling stage, reagent system, filtration, extraction, instrumentation and controls as one integrated process. A filter cannot be selected independently from the thermal process that feeds it.
Cooling: bring the flue gas into the correct treatment window.
Mercury abatement: integrate suitable adsorption and capture stages.
Acid gases: neutralise HCl and other target pollutants with controlled reagent dosing.
Filtration: separate dust, reaction products and captured pollutants.
Extraction: maintain stable negative pressure despite changing pressure losses.
Monitoring: coordinate process variables, alarms, trends and emissions data.
Treatment architecture
Cool, react, filter and extract within the correct operating window.
Dry and wet treatment performance depends strongly on temperature, humidity, mixing, residence time and pressure loss. Each stage must therefore be sized together with the next.
Cooling & conditioning
Heat exchanger, dilution, quench or other conditioning solution selected around the process and energy balance.
Reaction & adsorption
Lime, sodium bicarbonate, activated carbon or other suitable sorbents, injected in the right quantity and location.
Separation
Textile bags, ceramic elements, wet treatment or polishing technologies depending on gas conditions and pollutants.
Extraction & control
Fan sizing, variable-speed control, process negative pressure, instrumentation and automation.
Technologies
Select the treatment family around the gas and the required performance.
Several technologies can be combined within the same treatment train. The correct solution depends on temperature, chemistry, dust properties, available footprint, maintenance strategy and emissions objectives.
Textile baghouse filter
Proven dry-filtration architecture with filter bags, cages, hoppers and pulse-jet cleaning after suitable gas cooling.
High-temperature ceramic filtration
Rigid ceramic elements for applications where conventional textile media are not suited to the selected temperature window.
Dry & semi-dry treatment
Reagent injection and adsorption followed by final separation in a dry filtration stage.
Wet scrubbers & Venturi
Gas/liquid contact for cooling, absorption and particulate capture where a wet architecture is justified.
WESP
Optional wet electrostatic polishing for fine particles, aerosols, mists and selected metals.
DeNOx
SNCR or SCR can be integrated where process control alone does not achieve the required NOx performance.
Mercury abatement
Capture strategy must be integrated with temperature, reagent and filtration design.
Mercury control is not just a reagent choice. Gas temperature, contact time, sorbent selection, mixing, filter behaviour and residue management influence the performance of the complete abatement line.
Temperature window
Condition flue gas to a range suitable for the selected adsorption and filtration strategy.
Sorbent dosing
Control activated carbon or another suitable adsorbent according to the selected process architecture.
Contact & capture
Provide effective mixing and sufficient interaction before particulate separation.
Residue management
Design collection, discharge and handling around the characteristics of captured treatment residues.
Retrofit of existing flue-gas lines
Modernise the treatment system without automatically replacing the complete line.
Poor performance can come from a fouled heat exchanger, unsuitable dosing, ageing bags, air ingress, an extraction fan operating away from its duty point, instrumentation drift or outdated control logic.
Measurements & diagnosis
Temperatures, flows, pressures, pressure losses, analyses, reagent consumption and equipment inspection.
Heat exchanger or quench
Cleaning, repair, replacement or resizing to restore the correct treatment window.
Bags, ceramics & cleaning
Media replacement, sealing, pulse cleaning, sequencing and residue discharge improvements.
Automation & analysis
PLC migration, new sensors, analysers, data logging and diagnostics.
UK SEO cluster
Cremation, filtration and retrofit — connected as one technical subject.
The English CFI site now links the main UK cremation topics together so search engines and AI systems can understand the relationship between cremators, PG5/2(25), abatement and modernisation.
Frequently asked questions
Flue-gas treatment for UK crematoria.
Final technical design depends on the process, permit, site constraints, existing equipment and the applicable requirements.
What does PG5/2(25) mean for an existing crematorium?
The current guidance sets the transition toward tighter requirements, including the 4 December 2029 date from which existing cremators must comply with the emission limit values for new cremators.
Can CFI Systems retrofit an existing crematorium filtration system?
Yes. Cooling, reagent dosing, filtration, extraction, instrumentation and control can be assessed individually and as a complete treatment line.
Does mercury abatement require a complete new cremator?
Not necessarily. The right solution depends on the existing cremator, available space, gas conditions, filtration architecture and regulatory context. A technical assessment should define whether retrofit or replacement is appropriate.
Can filtration be engineered together with a new electric or hybrid cremator?
Yes. CFI Systems designs the cremator and downstream flue-gas treatment as an integrated process so temperatures, extraction, controls and treatment stages remain coherent.
Flue-gas treatment project
Tell us about your process, flue gas and emissions objectives.
New line, mercury abatement, textile baghouse, ceramic filtration, reagent system, scrubber, extraction, monitoring or retrofit: CFI Systems studies the complete treatment chain.