Industrial Flue Gas Treatment Systems and Services Market to be at Forefront by 2019
Industrial
flue gas treatment system is a set of technologies which is used to
remove hazardous gases such as sulphur dioxide (SO2) and nitrogen
oxide (NOx) from the emission of industries and power plants. Fossil
fuels such as oil and coal contain specified amount of sulphur. When
these fuels are combusted in the presence of air almost 95% or more
sulphur is directly converted into sulphur dioxide (SO2). When flue
gas has excess quantity of oxygen it is again converted into sulphur
tri oxide (SO3). In flue gas treatment system the flue gas is
generally passed through an ash removal device and then through a SO2
absorber.
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Air
pollution is treated as the most serious problem now a day. The
increase in the number of industries and power plants lead to
emission of sulphur dioxide and other gases in atmosphere. This
sulphur dioxide directly reacts with vapors and other compounds in
atmosphere to form acid rain and fog. The increasing concern about
the atmosphere is the major driver for the market of flue gas
treatment system. Reduction in the operating cost by the means of
heat recovery, reduction in stack plume, improvement in operability
of industries, are drawing social attention towards this market. Cost
associated with the installation of gas treatment system and
maintenance restricts the market somewhere. Strict policies regarding
pollution control, advancement in technology and various incentive
benefits provided by appropriate commissions for reducing emission
bring new opportunities to the market.
Flue
gas treatment systems are segmented on the basis of gases types that
are required to be removed from the emission. For removal of NOX the
flue gas is passed through a mixture of active catalyst. This
converts nitrogen oxide (NOx) into naturally occurring nitrogen and
water. Most of the FGD units are based on two levels, one for fly ash
elimination and other for sulphur dioxide reduction. In wet scrubber
system the flue gas usually passes all the way through a fly ash
elimination device, either through an electrostatic precipitator or a
wet scrubber then to a sulphur absorber. Various types of wet
scrubber designs are used such as plate towers, venturi and mobile
packet beds.
A
venturi scrubber is a converging duct and this duct accelerates the
velocity of the gas stream. When a liquid stream is injected, at the
point of maximum velocity turbulence caused by higher velocity
atomizes the liquid into small droplets thus creating a surface area
for mass transfer. In packet bed scrubber a packing material is
placed inside a tower. The packing material can be in the shape of
rings or some specialized shapes designed to maximize the contact
area for liquid and gas. For a specific collection area electrostatic
precipitators are also used. Flue gas enters from the inlet of a
chamber containing two charged electrodes and the suspended particles
get attracted to the opposite polarized electrodes.
The
clean gas leaves the chamber from the outlet. Mercury emission from
the flue gas is a significant environmental concern because of
toxicity and high volatility. Carbon fibers beds are usually used to
remove heavy metals like mercury and organic pollutants from the flue
gas. The flue gas flows parallel through the filter bed while the
absorbent flows from top to bottom. The industrial flue gas treatment
systems are widely used in industries such as power generation,
cement manufacturing, metal and chemical processing.
Maximum
number of power plants and manufacturing industries in North American
region makes the region best suited for the market. In Asia Pacific
region India and China are continually making new investments in the
production industries making the region a great option for the
investors. European countries such as Sweden, Germany and Switzerland
have decided to shift over renewable providing fewer opportunities
for the market.
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Some
of the key players in the flue gas treatment systems are Non-Tel
Systems, STT Environ Corp, Beltran Technologies, Envitech, Agilis
Technology, Classifier Milling Systems, Chattanooga Boiler & Tank
Co. and Ducon Environment System among others.
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