Pollution Control

Spraying nozzles for NOx reduction

Process

Common issues with NOx reduction

Industrial factories have a legal obligation to control industrial pollution (EU VII) regarding the amount of NOx emission. Facing air quality law, waste management law, and health problems, industries are aware of the strict regulation. The use of spray nozzle / injection lance for NOx reduction is common in Pollution control to clean the air. But heat, clogging issues, exterior deterioration can damage the nozzles, requiring additional investment to maintain them.

We, at IKEUCHI Group, gathered the knowledge of the damages done to analyze them and offer solutions to ensure a longer life-time of our products.

Example of some damages observed:

  • Heat damages: figure 1 of an injection lance used for 1 month in a boiler tube with ca. 1000°C
  • Clogging issues: figure 2 of a clogged nozzle tip with crystallized urea
  • Exterior deterioration: figure 3 of a damaged nozzle tip due to fly ash particles scrubbing against it and changing its shape

Damages-on-nozzles

Solution: Optimal injection lance with protective equipment for a long-life usage

In order to control “air contamination” worldwide, our R&D department produce optimal injection lance. The performance of our nozzles is a key factor for IKEUCHI, thus, we have been developing heat resistance nozzles (from 400°C up to 1,000°C heat resistance) with clog-resistance design and even spray distribution.

In addition, we offer optional equipment to protect them: Protective air tube, Water-cooling jacket, and Retracting mount equipment

Protective-equipment

Where can they be used: 

  • Applications for SNCR (Selective Non-Catalytic Reduction): Cement plants, waste incinerators, cool power stations
  • Applications for SCR (Selective Catalytic Reduction): Ships, power plants, gas engine power plants

Example of Systems / Products used for this solution

DOVVA-G series  Flat Spray Pneumatic Spray Nozzles for SNCR with semi-fine atomization to optimize the reaction with ammonia water

SETOJet series  Clog-resistant Fine Fog Nozzles for SCR to reach full evaporation with smaller droplets

Solutions

Benefits

  • Fine atomization for efficient reaction
  • Less maintenance cost with a less clogging structure against urea precipitation (SCR) and long-life usage with protective equipment (SCR/SNCR)
  • Energy saving with low air consumption

Advantages of the solution

  • Custom-built solution with nozzle lances, flanged connections, and other optional mounting systems to meet each specifications
  • Long-life usage thanks to the optional equipment to protect the injection lance
  • Clog-resistant design
  • Various option of spray capacity and angles to cover a wide area with an even distribution
  • 20 years of good reference with over 2.000 pcs of lance nozzles (DOVVA-G series) supplied in Asian countries yearly

SNCR

Other applications for these nozzles

  • Denitration: Gas cooling
  • Moisture control: Flue gas
  • Combustion: Waste water
  • Spraying: Oil, lubricant, mold release agent, honey. aqueous urea, rust preventive, glaze, viscous liquid, slurry

Related applications