Ecopure TAR: Exhaust air purification with heat recovery
The Ecopure® TAR recuperative thermal exhaust air purification process is the best-proven, safest and most universally applicable incineration method, by means of which organic contaminants are transformed mainly into water and carbon dioxide.
The most stringent legal requirements are met. There are no secondary problems such as waste water.
The plants maintain their high removal efficiency throughout their lifetime.
These systems can run fully automatically and require minimum maintenance.
Dürr Ecopure® TAR plants are used worldwide. DÜRR has already built more than 3.000 plants of this type and delivered them to customers.
The recuperative thermal exhaust air purification process Ecopure® TAR is the most suitable method to be applied when
- process exhaust air has to be purified on the one hand , and
- process heating is required at the same time.
The basic component of the exhaust air purification plant is the Ecopure® TAR compact unit. This is where exhaust air purification actually takes place. It consist of:
- Combustion chamber,
- Burner and
- Integrated heat exchanger for pre-heating the exhaust air from production.
Dürr has standardized 7 sizes, so the customer can choose the suitable size to suit the exhaust air volume to be treated.
For larger temperature turndown ratios, the unit can also be supplied with a multi-function bypass.
The exhaust air is supplied to the compact unit at the specific process temperature of the oven.
The exhaust air is pre-heated to 550 °C in the heat exchanger of the compact unit.
In the combustion chamber of the compact unit, the contaminants contained in the exhaust air are incinerated at a temperature of approx. 750 °C, leaving virtually no residues. The energy required for this is covered by the energy of the contaminants contained in the exhaust air - solvents and plasticizers - and the additional fuel fed in, normally natural gas. The clean gas produced during the incineration process leaves the compact unit through the integrated heat exchanger. In the area of application described here (paint shops), the heat still contained in the clean gas is used mainly for heating the ovens and, if heat wheels are installed, is also used for heating air supply units.