New High Temperature Filter Cartridge
25 August 2006, News release from MQP Ltd
The X 650 Pleated cartridge is a unique new filter element capable of operating continuously at temperatures of 290 C enabling baghouse filters to be upgraded by simple retro fitting of the cartridge into the existing tube plate.
No modifications are required and baghouse filter performance can be significantly improved by an up to doubling of filter cloth area resulting in:
The X 650 cartridge has been developed by BDH Tech, a Canadian company based in Chicoutimi, Quebec specialising in filtration. BDH are the leading supplier of both low temperature and high temperature filtration media in Canada and developed this exciting new technology to meet the increasing need for effective high temperature filtration.
BDH's products are exclusively marketed in Europe by MQP Limited based in Solihull, England. In addition to technical support from BDH MQP is supported in Europe by BMH Consulting who bring a wealth of industry knowledge built up over years of experience in the filter business which ensures that all project proposals are fully engineered to the highest standard.
The construction of the X650 cartridge features:
X650 cartridge showing metal end caps and heavy duty banding
X650 Cartridge showing high temperature aluminium joint between end caps and media
The unique feature of the X650 cartridge that enables it to operate continuously at temperatures up to 290 C is the way that the joints between the media and the end caps are constructed. A patented process using a liquid aluminium potting alloy ensures a joint which is capable of withstanding temperatures up to 600 °C
X650 Cartridges are available in the following formats:
|Length||No of pleats||Cloth area|
|1.65m||44 with depth of 25.5mm||3.7m2|
|2.0m||44 with depth of 25.5mm||4.5m2|
|4.0m||35 with depth of 25.5mm||7.0m2|
TECHNICAL DATA SHEET FOR FIBRE GLASS FILTER MEDIA (NON-WOVEN)
|CONSTRUCTION:||Needle Felt with Teflon membrane|
|TREATMENT:||With Phenolic resin|
|WEIGHT :||575 g / m2|
|AIR PERMEABILITY :||25 l / minute / dm2 (@ 200 Pa)|
|THICKNESS :||1.0 ±0.25 mm|
|MAXIMUM TEMPERATURE:||280° C|
The X650 was first introduced at Quebec Iron and Titanium in Canada in 2004 and has been in continuous production use on all four 960 compartment baghouse filters each treating 100,000m3/hr of waste gas since November 2005. Since then product has been applied in a number of other applications including waste incineration, soil desorption, and titania micronization.
The industrial experience is summarized in two cases studies below:
Case history | Rotary kiln calcination
Ore of TiO2 and Fe2O3 is calcined at 1200 C in a rotary kiln at a rate of 100 T per hour. At the outlet of the kiln, the gas is cooled to 240C by mixing with ambient air and then passed to a bag house where it is treated by X650.
Objective: Reduction of emissions to less than 15 kg/h for the total of the four baghouses.
Goal achieved: emissions are now down to 7 kg/h with X650
|Initial bags of Fiberglass with E-PTFE Membrane (Gore)||New fiberglass pleated elements X600 (44 pleats of 25 mm of pleat depth) (BDHTECH)|
|Baghouse type||Pulse jet||Pulse jet|
|Bags dimensions||140 x 4295 mm||140 x 1640 mm|
|Surface of 1 bag||1.95 2||3.62 m2|
|Number of bags||960||960|
|Air flow||100,000 m3/h||100,000 m3/h|
|Air-to-cloth ratio||0.89 m/minute||0.48 m/minute|
|/\ Pressure||1.5-3.0 kPa||0.6-1.5 kPa|
|Temperature||220° C||220° C|
|Dust composition||TiO2, Fe2O3, SiO2||TiO2, Fe2O3, SiO2|
|Mean particle size||5 µ||5 µ|
|Gas composition||N2, CO2, CO,SO2(1000 PPM)||N2, CO2, CO,SO2(1000 PPM)|
|Cleaning frequency||8 seconds||1800 seconds (30minutes)|
|Service time||3-12 months||> 18 months|
|Dust load ( g/m3)||4||4|
Case History 2 Microniser for reducing particle size of TiO2
TiO2 is used as a pigment in paint. It is obtained by treating an ore containing TiO2 and Fe2O3 and impurities by chlorine which results in the production of TiCl4 as a liquid that is easily separated from the impurities. The liquid is then evaporated and fed into an oxygen rich flame at more than 1500 C.
Some grades of finished product require finer TiO2 particles. For these applications, the TiO2 is projected at high velocity together with steam on a steel plate. This reduces the particle size. This is part of the plant is referred to as the micronizer and the final ground product then is separated from steam using X650 cartridges.
Objective: Increase lifetime to decrease downtime and cost of manpower for bags replacements.
Currently bags are changed every 6 weeks and the plant has 4 baghouses.
Target is to get a 1 year lifetime and the current installation of x650 cartridges has been in operation for 8months with no signs of deterioration
|Initial bags of Nomex||New fiberglass pleated elements X600 with PTFE membrane (44 pleats of 25.4 mm of pleat depth)|
|Baghouse type||Pulse jet||Pulse jet|
|Bags dimensions||150 x 3048 mm||150 x 1640 mm|
|Surface of 1 bag||1.44 2||3.62 m2|
|Number of bags||135||135|
|Air flow||5400 kg of steam/ hour||5400 kg of steam/ hour|
|Air-to-cloth ratio||Not known||Not known|
|/\ Pressure||2.0 -3.7 kPa||0.2 -1.0 kPa|
|Temperature||170° C||170° C|
|Mean particle size||0.5-1.0 µ||0.5-1.0 µ|
|Gas composition||Air and water||Air and water|
|Cleaning frequency||4 seconds||8 seconds|
|Service time||6 weeks||> 24 weeks ( still in operation)|
|Dust load ( g/m3)||2800 kg/h||2800 kg/h|
What to do next
MQP can provide expert technical consultancy on any proposed application to assess performance and potential benefits. Once an application has been positively evaluated then normally several X650 cartridges would be supplied for insertion into the existing baghouse tubeplate for an initial assessment over a period of 3 months. The trial units should then be returned to BDH for a detailed assessment of wear and cleaning characteristics in the particular application environment. If performance is satisfactory then the next stage would be to equip one complete compartment and monitor all characteristics including pressure drop, life, emissions and cleaning frequency.
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For further information please email MQP Ltd