Environmental inDUSTRIAL technology
With the German based company EITec-GmbH, CeramicForum proposes design, engineering, supply and installation of a complete range of exhaust gas purification & energy recovery systems.
VOC's - NOx - SOx, HCl, HF, particulates,odor, solvents, heavy metals, furans, etc
Cascade fluor filter / D.L.A. (Dry Lime Adsorbers)
on the left shows one of the largest exhaust air purification systems build by
EITec-GmbH. Most common used at Roofing tile and brick plants, purifying the
smoke gasses from HF, HCl, SOx amd dust within limits. Top section contains the
silo (bin) with absorber material (re-agent).
This silo feeds the reactor
section underneath which consists of vertically place cascades, containing the
bulk absorber material. The exhaust air flows horizontally through the
cascades, scrubbing the air from impurities by means of reaction with the
absorber granulate. (Calcium Carbonate / Calcium Hydroxide, etc.) Discharge unit
and the design of the cascade ensure an even flow of the absorber material,
whereas the the cascade specific dimensions and air pressure parameters ensure
the homogenous flow with perfect reaction time.
The modular construction allows
to custom design according to the study made for each application. Calcium
Hydroxide is recalculated after being fed through a peeling drum underneath. The
waste material could be crushed in an special EITec crushing plant and recycled.
R.T.O. (Regenerative Thermal Oxidizers)
When additives are used in bricks blocks like paper mash, polystyrene and/or sawdust, etc., Carbon Oxides are apparent and "post combustion" is the most effective solution. The thermal reacting part consists
of chambers comprising heat exchanging refractory. An oxidation chamber with
integrated burner is installed above the heat exchanger. Exhaust Air is heated
by a first refractory heat exchanger where partial reaction takes place already,
whereas final reaction is in the oxidation chamber. The hot purified air now
heats up a second heat exchanging refractory bed to cool down and leaving
through the chimney stack.
The heating up and cooling down of refractory beds is
a reversible process by means of closing off and opening dampers in the various
ducts by a computer program management, to minimise the heat loss and can
even be autogenous, in case of sufficient organic contaminants within the
Desulfurisation bag-house / D.I.F.F. (Dry lime Injection Fabric Filter)
When sulphur contents are of very high concentrations, conventional cascades
placed in series can block up, require extreme high maintenance survey and
corrosion is inevitable. EITec-GmbH proposes Reactor + Filter Bag house exhaust
air plant, which is commonly used in the waste disposal industry. In short:
Exhaust gasses passing through a reactor where the contaminants are in contact
with the re-agent fines. H2O can here be added to reduce to a desired
temperature and activate the chemical reaction. The dry particles are then
extracted in the bag filter house. The re-agent can be recycled or discharged in
the waste silo.
EITec the prefers the "Tubular" type heat exchangers: Air/air, air/water, or air/steam. In case of air/air, the exhaust gases are flowing through the pipes and the "new" recuperated air flow is around the pipes. This has the advantage that the exhaust gasses are in a temperature controlled "buffer" situation and there are no cold spots in corners like with the "plate" type heat exchangers. An aditional hot by-pass feature is installed as a security and is activated in case temperatures of the exhaust gasses at the exit are getting too close to the condensation point. Tubelar type heat exchangers with this temperature controlled by-pass can therefor be installed straight after the kiln exhaust, reducing also the air volume and therefor ductwork & scrubber dimenstions. (= investment cost)
Entering in to the decenia of sustainable, durable and waste to energy - EITec has invented a pantented "CoGenDis" process, where oil, gas, carbon black and scrap steel is recovered from "reversed processed" spend vehicle tyres. Complete turn-key projects are available for different annual quanitities.