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Chemical Process Industry Requirements tend to have larger gas flows and therefore the scrubbing systems tend to consist of quite large gas scrubber vessels, Parsons manufacture scrubber vessels up to 4.5 metres diameter.
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Front End Design Study |
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Discharge Stacks |
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Process Engineering |
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Scrubber Design |
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Supporting/Access Steel Structures |
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Civil Requirements |
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Liquid Recirculation/Piping/Cooling/Pump Sizing |
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Site Surveying |
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Internals Design |
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Construction Management |
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Liquid Distribution |
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Installation |
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Mist Elimination |
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CDM Compliance |
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Exhaust Ductwork |
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Commissioning |
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Fan Selection |
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Documentation |
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Jobside and Atmospheric Attenuation Requirements/Noise Studies
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Handover |
The above list details the full services offered by Parsons and the client can select which elements they wish Parsons to provide and which they prefer to resource in-house, clear identification of responsibilities at an early stage of a project ensures project completion on time and on budget.
Parsons are equally experienced on Greenfield site projects, or replacement of existing equipment within a working production facility, both represent challenges. The importance of accurate site surveying is just as important in all cases. Parsons utilise state of the art “All Station” laser measuring devices, which are used by experienced engineers who then download the information into a 3D AutoCAD image that forms the basis of the design. Once the site survey has been completed the normal mechanical and process engineering procedures are undertaken to produce manufacturing drawings, during manufacture in Parsons factory the vessels are regularly inspected and dimensional laser checks are carried out and overlaid onto the site General Arrangement Drawings to ensure accurate interfacing.
The Scrubbing vessels tend to be manufactured from 6mm PP reinforced externally with GRP; various resin systems are used to accommodate process design requirements in respect of heat distortion and chemical resistance. In certain cases PP is not recommended and so as alternatives Parsons offer PVDF, ECTFE, FEP and PFA although these materials tend to be thinner.
Parsons have developed considerable expertise in all materials including pure Furane GRP moulded construction.
Generally system pressures fall in the range of 1000 Pa to 6000 Pa and so corrosion resistant fans form an integral element of the system, Parsons manufacture a full range of corrosion resistant fans.
Small scrubbing packages can be skid mounted, which enables the scrubber to be installed within a coated mild steel framework giving access to all parts of the scrubber for the purpose of maintenance. The recirculation pumps, pipe work, ductwork, instrumentation and control panels are all mounted within the skid, fully installed and tested in our works so that all commissioning can be done off site. This facility reduces cost and installation times on site and is a design option that has been used many times by clients both in the UK and Overseas.
On larger scrubber installations Skid mounting is not practical however Parsons have lead the way in skid mounted Recirculation systems which again minimises site installation time and cost.
Plastic Ductwork systems can be quite complex on larger Chemical Processing site’s and reliable flow control and isolation are demanded for safe plant operation Parsons manufacture a full range of manual and actuated dampers for flow control and isolation purposes to complete their ductwork programme. The ductwork programme ranges in size from 110 mm diameter up to 3000 mm diameter is available in pvc or polypropylene reinforced where required with GRP, a range of corrosion resistant attenuators and stacks completes the complete system.
Parsons who manufactures a wide range of plastic storage vessels and reactors also caters for the storage and processing of chemicals. Vessels are manufactured from:
PVC, Polypropylene, Acrylic, PVDF, ECTFE, FEP, PFA reinforced externally where required with GRP in accordance with BS 4994-1987 other standards such as ASME X and DVS 2205 are also available on request.
Vessels are available in rectangular/square styles in complete or sectional design, where space or processes prefer circular vessels up to 4.5 metres diameter 18 metres tall can be produced. Circular vessels tend to be vertical axis but if preferred Parsons can supply Horizontal axis vessels complete with support cradles. Full delivery, installation and commissioning services are available using our own experienced site technicians supervised by our Qualified Engineering Staff.
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Totally enclosed or lids |
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Heaters |
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Man way Entrance Points |
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Lagging |
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Hold Down Feet |
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Access Ladders |
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Lifting Lugs |
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Tanker Filling Pipework |
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Nozzles |
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Storage Bunds |
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Contents Gauges |
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Remote Alarm Systems |
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Discharge Pipework/ Metering/Distribution Systems |
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