Clean Air
Maintaining clean air is one of today’s most pressing environmental issues. Legislation is becoming ever more stringent and the public is increasingly aware of industry transgressions. It is essential that all companies with the potential to pollute operate and maintain efficient, reliable and effective clean air systems.
Jord has a range of particulate removal and wet scrubbing technology.
The image below shows three of eight scrubber towers Jord supplied in modular form to a polycarbonate plant in Saudi Arabia. Flowrates ranged from 150 to 30,000 Nm3/hr. Target gases in the various vent gas streams distributed around the plant included ethylene oxide.
Packed tower scrubbers are suitable for a wide variety of toxic, hazardous and odorous gases, including hydrochloric and other halogenic acids; hydrogen sulphide; sulphur dioxide; chlorine; ammonia and various amine gases. Jord’s packed tower scrubbers achieve highly efficient absorption. Removal efficiencies of 99.99% are achievable in some of the above applications.
The image below shows a scrubber tower Jord supplied in modular form to a pharmaceutical plant in Singapore. Whilst the flowrate was small, the target gas inlet concentration and gas removal efficiency were both very high.
The image below shows a scrubber tower Jord supplied to an alumina refinery in Australia. The flowrate was large and the target gases were elemental Iodine, hydroiodic and hydrochloric acid. The chemistry required to deal with this mixture was unusual.
The image below shows a scrubber tower Jord supplied to an Ammonium Nitrate plant in Australia. It scrubs particulate from the flue gas emanating from a prilling tower. The flowrate was large and vessel was fabricated from stainless steel.
Mesh pad scrubbers are suitable for applications that target entrained acid droplets and/or processes which are subjected to severe fouling.
The image below shows one of 3 mesh pad towers Jord supplied in modular form to a Phosphate fertilizer plant in Saudi Arabia. These units hydrolyse silicon tetrafluoride, and then scrub out the silica fines and the hydrofluoric and fluosilicic acid that are formed.
Sieve tray scrubbers are suitable for applications that have low inlet particulate concentrations and moderate particle size range, and have moderate removal efficiency and turn-down requirements.
The image below shows a scrubber tower Jord supplied to an Ammonium Nitrate plant in Australia. It scrubs gases and particulate from the flue gas emanating from a prill dryer. The flowrate was large and vessel was fabricated from stainless steel.
Venturi scrubbers are suitable for removing particulates. They can be used for a wide size range of particulates. In practice achieving high removal efficiency means capturing particles in the lowest of size ranges, say less than 3 micron in diameter, and for this they must be operate with high pressure drops across the venturi throat. So venturi scrubbers can remove small particles, but to do so, and achieve very high removal efficiency, requires very high pressure drops (>1100mm WG). Jord provides both fixed and variable throat designs. Variable is preferred where flow conditions vary widely and require frequent adjustments. Jord has such a venturi scrubber incorporated into a uranium calcining unit operating in South Australia.
The main method of removing nitrogen oxides (NOx) uses a reducing agent. This process converts NOx into harmless gases, nitrogen and water vapour. The reducing agent is usually ammonia. The main method for NOx abatement is Selective Catalytic Reduction (SCR). SCR enables reduction of NOx by passing the flue gas through a catalyst after injecting it with ammonia. SCR has the highest removal efficiency among the DeNOx technologies.
The image below shows a SCR vessel Jord supplied to an Ammonium Nitrate plant in Australia. It scrubbed NOx from the flue gas emanating from a nitric acid plant. The pressure and temperature were high and vessel was fabricated from stainless steel.
