PLANTS FOR exhaust air purification
Our technology enables an economically cleaning of industrial exhaust air from pollution and odor by intelligent energy reuse.
Remove the industrial exhaust air from odor, organic or other pollutants
Remove the industrial exhaust air from odor, organic or other pollutants (for example solvent processes) and optimize at the same time cost for cleaning installations. The major point is to reduce the pollutants in the effluent air. Our technology removes pollutants and odor simultaneously – optional with integrated heat recovery.
Our experience is your advantage
PROCESS COMBINATIONS FOR EXHAUST AIR PURIFICATION
Adsorptive concentration and thermal oxidation
Concentration by an adsorption wheel and recuperative/regenerative thermal oxidizer
State of the art for huge exhaust air volumes with a low solvent content is concentration of the solvent by an adsorption wheel and a following reuse of the energy of the Volatile Organic Compounds (VOC) by oxidation.
Concentration by adsorption takes usually place in noncombustible zeolites.
If the VOC can be oxidized in a recuperative thermal oxidizer (TO) or in a regenerative thermal oxidizer (RTO) depends on the volume, the VOC-mixture and the concentration in the exhaust air. After concentration of the VOC the oxidation can be typically take place without adding of further fuel (RTO). In a thermal oxidizer (TO) is typically a fuel required.
Commonly the rejected heat can be reused and integrated into the local energy management system.
Combination adsorptive concentration and micro gas turbine
Combination of concentration by adsorption and micro gas turbine/microturbine
The combination of concentration and oxidation of the VOC in a micro gas turbine is an innovative and very economically technique. The oxidation in the micro gas turbine produces electricity.
The concentration is made via zeolite rotor similar to the concentration + recuperation/regenerative thermal oxidation (RTO). After that the air which contains the high concentrated VOC is led to a micro gas turbine. Due to a short exposure time of the VOC in the turbine a catalyst for fine adjustment is followed. For fine adjustment no further energy is required. Additional to electricity it is possible to recover heat or cooling energy with this technology and integrated into the local energy management system.
The amortization of the additional cost compared to the state of the art depend on the local energy costs and it is about 2 – 3 years.
Combination concentration by absorption and condensation
Combination concentration by absorption and condensation
Due to a very high concentration value (up to 100 to 1), which can be achieved by absorption is a combination with solvent recovery economical. Especially for expensive solvents this can be a good alternative in case the recovery is not to complex.
With this process the exhaust air can be free of CO2 and the recovered substance cycle can be closed.
EXHAUST AIR PURIFICATION FOR SOLVENT BASED PROCESSES
According to your data of volume, temperature, solvent content it is possible to evaluate the air cleaning technique in your process.
At high volumes and low concentrations it is recommended to start with a concentration step. It is followed by condensation and oxidation for disposal/recovery of concentrated solvents. In case of oxidation a renewable electricity can be generated.
At high temperature of the exhaust air a oxidation might be the first choice. In case of expensive solvents the recovery via condenser is recommended. For 3-shift operation generation of electricity is most economical.
Based on the parameter of the exhaust air a safe and economical concept for air treatment and energy recovery can be made.
Processes & techniques in exhaust air purification
TYPICAL CASES IN EXHAUST AIR PURIFICATION
QWAIR does have references in the following cases and is able to remove the typical pollutants from the air – efficient and economical.
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We look forward to receiving your non-binding enquiry for the planning and realisation of a plant for industrial exhaust air purification.