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Biosketch

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Stoker Simulator

stoker schematic

Schematic of Stoker Simulator

The stoker apparatus simulates the combustion environment typically found in stoker-fired boilers. The facility simulates a moving bed in that the air flow rates are varied with time. The ignition plane can be traced as a function of time and operating conditions.

Features

Design

Fabricated from 14" steel pipe; 1.25" concentric castable refractory and 3.5" of insulation.
Four sampling ports (3/8" diameter) at 90o angles to each other at 1" intervals (axially) from the grate
Electric coil is used to provide the ignition energy to the top of the bed

Fuel Fired

Coal, Coal-Biomass Mixture, Coal-Tire Mixture

Fuel Charge

1.7 lb corresponding to a bed thickness of 4.5" giving a midrange area firing density typical of utility-scale stoker boilers (8-50 lbs per sq ft)

Combustion Air

Supplied via distributor plate to the bottom of the chamber

Diagnostics
  • Continuous emission monitoring: CO, CO2, O2, SO2 and NOx within the bed
  • Gateway 2000 computer interface with apparatus to collect temperatures, gas composition data and pressure drop across the bed using Viewdac data collection software