De Nox System
These systems are designed to extract Nitrogen Oxides from the Exhaust Gas. Our Partners in China has long-standing expertise in providing solution to use these oxides and convert in into forms that the industry can use as raw material.
A De-NOx system extracts nitrogen oxides from exhaust gas before it is released. Nitrogen oxides form wherever combustion takes place at high temperature, which makes furnaces, melting operations and fired process equipment the usual sources in metal recycling and steel plants.
Why nitrogen oxides are controlled
NOx is one of the pollutants routinely checked during stack monitoring, and it is regulated because of its role in ground level ozone and acid deposition. For a plant operator the practical consequence is simple: if the stack reading exceeds the limit in your consent conditions, the plant is out of compliance and the correction is usually urgent rather than planned.
Recovering value rather than only removing a pollutant
Our partners have long standing expertise in converting extracted nitrogen oxides into forms that industry can take back as raw material. That changes the economics of the installation. A system treated purely as a compliance cost is dead capital, whereas one producing a recoverable product offsets part of its own operating expense. Whether recovery makes sense for your plant depends on your gas volume and concentration, so it is assessed rather than assumed.
What we need to size a system
- Exhaust gas volume and temperature
- Inlet NOx concentration from stack measurement
- The outlet limit you need to meet
- Whether the process runs continuously or in batches, since batch operations produce peaks that a system sized on averages will miss
- Space available around the existing exhaust route
With those figures a system can be sized properly. Without them any proposal is guesswork dressed up as a specification.
Combining with other stages
Where a plant needs particulate control as well, or sulphur oxide removal alongside NOx, the stages are designed as one exhaust train rather than as separate installations. That gets the sequence right, avoids paying twice for the same fan power, and means the ducting is planned once.
Retrofitting
Adding a De-NOx system to an existing stack is assessed case by case. Gas volume, temperature, available space and the condition of the existing ducting all decide whether a retrofit is practical or whether the exhaust train needs reworking. The physical constraints around the stack usually matter more than the treatment technology itself.
Starting point
Begin with a current stack emission measurement rather than with equipment selection. It tells you exactly which pollutants are out of range and by how much, and it becomes the baseline you measure the installed system against.
It extracts nitrogen oxides from exhaust gas before it is released. Nitrogen oxides form wherever combustion happens at high temperature, so furnaces and melting operations are the usual sources.
Yes. Our partners have long standing expertise in converting these oxides into forms that industry can take back as raw material, which changes the system from a pure compliance cost into something with recoverable value.
It is assessed case by case. Gas volume, temperature, available space and the existing duct and stack layout all decide whether a retrofit is practical or whether the exhaust train needs reworking.
Often yes. Where a plant needs both particulate and gaseous control, the stages are designed as one exhaust train so the equipment is correctly sequenced and you are not paying twice for the same fan power.
Start with a stack emission measurement against the limits in your consent conditions. That tells you which pollutants are actually out of range and prevents you from investing in a system you do not need.
