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Quarrying Reduce NOx


emissions from coal X


optix, based in Worcestershire, has developed the in-line particle sizer XO to maintain optimum coal milling production. As world coal sources vary greatly in fuel properties and loading profi les, uncontrolled combustion conditions force operators to apply boiler settings, which are conservative and far from ideally tuned. Particle sizing technology from Xoptix has been developed for coal milling and is based on over 30 years of knowledge of laser diffraction, which can be used to determine particle size. With the XO inline particle sizer installed to monitor milling production, over milling and under milling can be easily and quickly be detected with real-time measurements, and the process can be adjusted accordingly. If the coal is excessively coarse due


to under milling, then there will be higher levels of un-burnt carbon in the ash. This will adversely affect the effi ciency of the process and create a less saleable by-product. Conversely coal feed which is milled too fi ne produces areas of high temperature which lead to higher levels of NOx emissions and fl ame instability. This results in loss of effi ciency incurred by unnecessarily over grinding of the fuel. An optimum particle size distribution between these two extremes is highly desirable to ensure that power generation costs and emissions are kept to a minimum. Richard Graves explains the importance of accurate milling to control NOx emissions, “Our XO particle sizer helps coal mills to ensure optimisation of milling, which helps save production costs, but also reduces NOx emissions too. We place great importance


PRODUCT SERVICE LISTING September 2014 ABRASION RESISTANT LININGS & ELEVATOR COMPONENTS BLOWER UNITS


Close monitoring of coal milling with the XO particle sizer from Xoptix, safeguards coal from being over-milled and helps keep NOx emissions levels to a minimum.


on producing green technology that helps the environment and this ethos will always remain fi rmly rooted at the heart of the Xoptix culture.”


Generally coal should be pulverized until 92% is smaller than 74 microns and ideally there should be less than 2% greater than 300 microns. Xoptix Limited design, manufacture and distribute particle sizing products for process applications and are proud of their heritage in laser diffraction technology. The sizing of particles from 0.1 to 3000 micron is made easy with a robust and stable unit, with real-time inline monitoring to optimise processes. n For more information contact Xoptix on tel: 01684 899345 or visit: www.xoptix.co.uk


Telephone: 0203 377 3271


Email: steve.good@informa.com Web: www.solidsandbulk.co.uk BULK HANDLING SYSTEMS


ANACONDA BELTING COMPANY KRYPTANE Abrasion Resistant Sheeting


● Buckets ● Belts ● Bolts ● ● Speedswitches ● Fasteners ● Hanger Bearings ●


Bin Level Indicators Couplings


Unit 29 Church Road Business Centre, Church Road, Sittingbourne, Kent ME10 3RS TEL: 01474 709 784 FAX: 01474 709 896 WEBSITE: www.anacondabelting.co.uk


ABRASION RESISTANT LININGS BLOWER UNITS


Process Handling Systems 35 Years experience in the Design,


Supply, Installation and Commissioning of:


• Mechanical Handling and Storage • Pneumatic, Pressure & Vacuum Systems • Bag Discharging & Filling • Sieving, Weighing & Batching • Dust Extraction • Control and SCADA Systems • Equipment manufacturing • Maintenance & Spares


Tel : 020 8571 3988


Email: sales@ibsblowers.com www.ibsblowers.com


BLOWER UNITS BULK STORAGE & HANDLING


48 September 2014 Solids and Bulk Handling


www.solidsandbulk.co.uk


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