Teledyne 9700 instruction manual Flue Gas Analysis System, Introduction, Overview

Flue Gas Analysis System

General Information

Introduction

1 Overview

The Model 9700 analyzer system (see Figure 1) is an integrally housed combination of analyzers designed to continuously monitor the two primary components of flue gas which are the best indicators of combus- tion efficiency and safe operation. Through use of volumetric percentage measurements of oxygen and combustibles, it is possible to optimize the air-fuel ratio and approach the idealized condition of stoichiometric com- bustion. Additionally, monitoring of combustibles will assure a safe margin to prevent combustible mixtures from approaching LEL levels as a result of a malfunction, before boiler startup, etc. When necessary, appropriate regulation of the combustion process can be made to reduce nitrogen oxide (NOx) emissions and resultant air pollution.

The system is composed of the necessary components to educt a flue gas sample, condition it for analysis, and monitor on a continuous basis the percentage content of oxygen and combustible gases (see Figure 2).

When required, multipoint configurations, which automatically monitor from two to twelve points on a time shared basis, are available. Multipoint sequencing utilizes a stepping switch/timer which operates in conjunction with a solenoid valve on each sample input to control the time duration of the inflow. Indicating lights plus a recorder output show which sample points are being monitored at any given time. Override switches can be operated to omit any number of sample points from the monitoring program. If necessary, time delays can prevent the inadvertent tripping of alarms during the sample sequencing.

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Analytical Instruments