Combustion

Computational Fluid dynamic (CFD) is a powerful predictive tool used in combustion research. CFD is used for evaluation and optimization of burner and OFA port sizing and location. The numerical modeling provides the detailed boiler performance information that could not be obtained through physical modeling or plant testing. Improper combustion results in either increased level of nitrogen oxide causing air pollution or unburned char particles.


Combustion in Boiler

CFD simulations in utility furnaces have applications such as:
  • Examining the effects of burner tilt (in tangentially fired furnaces), burner swirl, and out-of-service burners on coal misdistribution and ash deposition.
  • Relating the effects of furnace flow patterns to CO and NO emissions and unburned carbon in ash
  • Designing and characterizing the performance of low-NOx burners.
  • Designing high-performance furnace.

Combustion in Tangential Fired boiler

Mewchwell have massive experience in flow modeling, simulation and combustion analysis give the solutions in Tangential coal fired boiler with help of CFD major problem in Sub-critical & super-critical Boilers is that left to right wall have always temperature difference of 40 to 50 deg C.

Mechwell provides the solution by studying the various aspects of Combustion such as

  • Theoretical & excess air requirement for Complete combustion
  • PA & SA Air for Complete Combustions
  • secondary air flow distribution in each corner
  • coal flow at each coal nozzle
  • Primary air distribution
  • Fire ball formation & propagation the furnace
  • Velocity propagation inside the furnace
  • Max. Burnout areas
  • High O2 concentration areas
  • Secondary Combustion Areas

Combustion Analysis in CFBC BOILER

CFD Analysis of CFBC Boiler have lots of complication in flow physics, like like combustions, fluidization ,heat transfer, chemical reactions ,erosion. so Mech-well have massive experience in flow modeling, simulation of CFBC boilers with help of CFD. Major problems CFBC boiler are erosion of Nozzles, erosion of the front & rear water walls, erosion of SH Panels, erosion in Cyclone, high temperature in Cyclone, erosion in second pass of boiler.

Mech-well provides the solution by studying the various aspects of fluidization & combustion such as

  • Theoretical & excess air requirement for Complete combustion
  • Primary & secondary air flow Study
  • Fluidization study
  • Combustion in Boiler
  • Velocity propagation inside the furnace
  • High O2 concentration areas
  • Secondary Combustion areas
  • Cyclone efficiency Study
  • Cyclone erosion

Combustion Analysis in Kilns & Calciner

Modern cement plants have Calciner to increase the productivity of the plant. Inside Caliciner have a strong endothermic reaction known as the calcination process, and another process is the combustion of pulverized solid fuels.

By CFD analysis pulverized fuel particles injection & trajectories can be optimized because it directly affects the energy consumption.

In Kiln major problem of the erosion of the castables & Flame length propagation & Emissions from the kiln.

Mech-well provides the solution by studying the various aspects of in Kilns & Calciners

  • Theoretical & excess air requirement for Complete combustion
  • Injection of coal particles & trajectories
  • Cause of erosion of the Castables
  • Flow from the Kiln to Calciner
  • Velocity propagation inside Kiln & Calciner
  • effect of various Coal Blending on combustion
  • Study of Particle residual time inside Calciner
  • Secondary Combustion areas
  • Study of pollutant emissions