Dry electrostatic precipitators reduce dust emissions on every continent for leading power and process companies. Using this highly versatile technology Lodge Cottrell is also able to provide many novel options for the upgrading of existing plants to meet ever more stringent emissions limits (IED). Our particulate control expertise extends to Wet-type precipitators with the supply of both vertical and horizontal flow units.
Our Pulse-Jet Fabric Filters achieve dust collection efficiencies of greater than 99.9% and are used throughout industry on a wide range of applications. They provide sound technical and commercially attractive solutions on processes which demand high collection efficiencies with related low dust emissions. These filters require an absolute minimum of attention and maintenance.
Lodge Cottrell Ceramic Filters are an extension to the Pulse-Jet Fabric Filter range and can operate at temperatures up to 500°C. They achieve particulate emissions as low as 1 mg/m3, and can operate in arduous process conditions with high acid gas concentrations. In additon to emission control the ceramic filter is also effective for the reclamation of valuable process materials such as metals and minerals.
Electrostatic Precipitators (dry type)
Lodge Cottrell have supplied dry Electrostatic Precipitators (ESPs) for particulate (dust) removal from customers gas emissions for over 100 years. In fact the principle of such use was discovered by Professor Sir Oliver Lodge who founded our business in 1913. With a century of expertise in the design, construction and operation of dry ESPs Lodge Cottrell are uniquely-placed to meet the demands of today’s customers. Using our experience gained from supplying many thousands of systems across the globe, maintaining these over millions of hours of operation and all the while looking to improve performance we simply offer the best solution to each and every customer.
We offers a comprehensive range of ESP solutions including:
Mechanical or MIGI rapping
Specially designed and selected collector plates and discharge electrodes
Side, top, bottom or front entry
Horizontal or vertical flow
Traditional T/R sets, Intermittent Energisation or High Voltage & Frequency Supply (SMPS)
Refurbishment, maintenance and upgrading of existing ESPs from any manufacturer
Electrostatic Precipitators (wet type) – including detarrers
Wet Electrostatic Precipitators (WESPs) are used to remove dust particles or other undesirable materials (usually aerosols of non-volatile compounds) from fuel or syngas streams and Lodge Cottrell have supplied several hundreds of such systems throughout the world. Typically WESPs are found at steelworks where they are used to remove dust from combustible gases and tar from coking plants. Currently there is a growing demand for WESPs to clean syngas produced in waste-to-energy/energy-from-waste plants using gasification processes.
Lodge Cottrell supply fabric filters to a wide variety of industries and have done so for several decades. Our fabric filters are designed in-house to meet the most stringent emission regulations covering particulate, SO2, heavy metals and dioxin levels.
Filter self-cleaning maybe done using pulse-jet or reverse-air techniques depending upon the needs of the customer. The selection of filter material (media) is governed by the operating conditions of the plant and the pollutant removal capacity of this maybe enhanced by the use of an appropriate conditioning agent (sorbent). In recent times the integration of our fabric filters into more comprehensive flue gas treatment systems, including sorbent injection and ash-handling systems, has become widespread especially n the biomass and waste-to-energy/energy-from-waste markets. Fabric filters are typically used when particulate emissions need to be very low and/or other chemical (gaseous) pollutants need to be removed at the same time.
When plant operating conditions cause flue gas temperatures to be high, then Lodge Cottrell are able use ceramic filter media that still enable customers to meet their emission levels.
Similarly, our ceramic filters can be used when ‘ultra’ filtration is required, with submicron particles removed to such an extent the remaining amounts are almost immeasurably low. Ceramic filters are typically applied in specialist production or waste treatment facilities.
Electrostatic Bag Filter – hybrid
Electrostatic Bag Filters (EBFs) are hybrids between ESPs and fabric filters.
Typically they are selected when a plant operator has an existing ESP that can no longer meet the emission levels required, yet they cannot extend the site housing their air pollution control system. Our company understand the unique challenges required when an ESP is converted into an EBF, and also when such systems are built as new.