How to...
To implement the chemistry of SCR, sophisticated process technology need to be employed. The most important process steps and their associated technical equipment are shown below.
PPM provides a range of unique products to achieve all this requirements economically and reliably.
Storing, level control and transport of reactant (40% urea)
Storage tank and pipework will usually be provided by the customer.
All material coming in contact with urea must be corrosion-resistant.
Dosing of reactant
Booster pump and dosing device - All In One
Mechanical equipment for pressurization and accurate flow control should be durable, reliable and easy to maintain.
Injection and atomization of reactant
Air cooled injector with two-component jet
Pressurized air is used to form a spray of uniformly sized droplets. Optimal air consumption ensures economic operation.
Evaporation of reactant and formation of ammonia
Injection Pipe
Previously formed droplets must not bounce against any surfaces. Incomplete transformation causes excessive urea consumption.
Mixing of exhaust gas & ammonia
Mixing pipe
Homogenous distribution of NOx and ammonia at minimal pressure loss is one secret for economic operation.
Catalytic conversion of nitrogen oxides
Converter filled with catalysts
Highest performance at minimal pressure loss while avoiding any ammonia slip results in significant cost saving in the long-run.
Automatic catalyst cleaning
Dust blowing system
Running the engines with particular fuels can call for an automatic cleaning system in order to keep high performance levels at all times.
Instrumentation and control
Control cubicle, operation panel, sensors
A user friendly HMI paired with long-lasting electrotechnical components will enable a seamless integration in the normal course of life.