INM-700 In-Situ NOx/O2 Monitor

INM-700 In-Situ NOx/O2 Monitor

Product Overview

HORIBA's INM-700 in-situ gas analyzer is designed to meet the requirements of coal-fired power generation plants for cost-effective, low maintenance NOX monitoring. The analyzer uses a ceramic diffusion filter and Zirconium Oxide sensor directly in the gas stream, which eliminates the need for an extraction process for sample collection, and results in lower maintenance. The INM-700 is ideal for inlet SCR control, NOX measurements, and burner balancing/combustion tuning in boiler plant operations.

The INM-700 has the advantage of lower installation, maintenance, and capital costs, and a faster response time. In addition, for compliance strategies, the ceramic filter allows measurements to be taken near the combustion point of the furnace. This technique utilizes combustion modification techniques such as:

  • Low NOX burners (LNB)
  • Over-fire air injection (OFA)
  • Gas re-burn systems
  • Boiler tuning
  • Combustion optimization programs

Applications

  • SCR control
  • Inlet/outlet NOX measurement
  • Replacement of FGAS shelters
  • Burner balancing/combustion tuning
    • Improved burner efficiencies and reduction of NOX
    • Identifying problem areas in the furnace due to gas stratification linked to specific burner columns.

Product Features

  • A NOX sensor using a new technology for coal fired applications which can improve control of the ammonia injection rate in SCR systems.
  • A practical NOX sensor with a fast response time that can be directly installed in the combustion gas stream.
  • Extremely robust sensors that are long lived and capable of withstanding elevated temperatures.

Manufactured by HORIBA

Product Specifications

Model

INM-700

Principle

Zirconia type

Measurement range

Nox: 0 to 100 ppm(minimum),
      0 to 1000ppm(maximum)
O2: 0 to 25%

Repeatability

Nox: ±1.0% of F.S.
O2: ±1.0% of F.S.

Drift

±2.0% of F.S./week

Response time(T90)

10 sec. or less

Display

LED digital display (effective 4 digits) for measuring value
LCD display for parameter setting

Output signal

Nox: DC 4 to 20 mA(maximum load 600 )
O2: DC 4 to 20 mA(maximum load 600)
Corrected Nox: DC 4 to 20mA
(allowable load resistance: 600 )

Calibration

Probe calibration (Automatic or manual)

Warm up time

approx. 5 min

Sensor cable

Max. 50m (164ft.)*1

Location

Indoor or outdoor

Operational temperature

- 10 to 50°C(23 to 122°F)

Humidity

90% RH(no moisture condensation)

Power

AC100V to 240V (50/60Hz)

Power consumption

approx. 60VA

Mass

Probe unit: approx. 10 kg (approx. 22lbs)
Controller unit: approx. 20kg (approx. 44lbs)

Cooling air consumption:
Stack gas application
(Instrument air)

400°C (752°F): approx. 70 L/min.(2.47 cfm)
350°C (662°F): approx. 50 L/min.(1.77 cfm)
300°C (572°F): approx. 40 L/min.(1.41 cfm)
200°C (392°F): approx. 40 L/min.(1.41 cfm)

Purge air
(Instrument air)

Pressure air: about 300kPa
Consumption air: 3 L/min.