Caldo Engineering Ltd.

Caldo Expertise
Caldo technology is based around the filtration of hot gases using low density ceramic filter elements. This technology derives from:

• more than 20 years of hands-on experience developing and commissioning hot gas filtration systems
• 3D CAD using AutoCad Inventor for continuous design improvement
• innovative application of ceramic filtration technology to an increasing range of duties

Caldo has established designs of hot gas filtration equipment in sizes ranging from pilot plants with 36 or less elements to full-scale production units containing more than 1000 elements in a single vessel.

Caldo supplies complete pollution control systems for the treatment of hot gases to meet the EC atmospheric emission limits as set out in directive 2000/76/EC.  Caldo works with third parties to develop complete solutions for the incineration of difficult wastes.

Caldo Products

Ceramic Filter Elements
Caldo supplies ceramic filter elements, gaskets and other ceramic filter components to end-users and OEMs internationally. The supply of these components is backed up by Caldo expertise in the design of ceramic filter vessels.

Caldo supports its customers with advice and problem solving based on its extensive experience of the use of ceramic filters in a wide range of applications.

Hot Gas Filtration Equipment
Caldo has successfully introduced a new design concept for ceramic filters containing 500 - 1500 elements. This allows hot gas filtration using ceramic elements to be considered for a wider range of applications than before.

For filters up to 500 elements, i.e. capacities up to about 8,500 Am3/h, Caldo has long-standing established designs of filter vessels. Caldo has experience of successfully specifying ceramic filtration equipment for a wide range of duties.

Pollution Control Systems
Hot gas filters can form the basis for systems to remove all of the pollutants in emissions to atmosphere from incinerators, furnaces, kilns and other high temperature equipment.

Complete Caldo systems can comprise some or all of the treatment stages:

• afterburners, to complete the combustion of all the VOCs in the gas stream
• selective non-catalytic reduction, SNCR, to remove the nitrogen oxides, NOx
• proprietary heat exchangers to cool the gas, typically from 850°C to 425°C
• dry scrubbing, by the addition of hydrated lime, to remove acid gases such as HCl and SO3
• hot gas filtration to remove solids and reduce particulate emissions to <5mg/m3
• hot gas filtration also to remove the condensed heavy metals

Incineration of Difficult Wastes
Caldo works with a UK company, Explosive and Ordnance Demilitarisation Solutions Ltd (EODS) to design, manufacture and supply complete solutions for the thermal disposal of munitions, typically small arms ammunition.

In this collaboration Caldo supplies engineering design and manufacturing skills to support EODS's knowledge of the end-user requirements. This joint approach has been successful; several incinerators have been built and more are in the pipeline.

Third parties with knowledge of other incinerator opportunities are encouraged to contact Caldo and review their requirements.