Laser gas analysis
Fields of application
The ZSS laser gasanalyser r is designed for waste incinerators, district heating systems, industrial boilers, and chemical plants.
Benefits
The ZSS laser gasanalyser r provides continuous measurement of HCl in flue gases at waste incineration plants and industrial waste disposal facilities; NH₃ in power plants and denitrification systems; and CO, CO₂, and O₂ in steel mills and chemical plants, with an extremely fast response time. Since the ZSS is installed directly on the stack—the duct through which the gas to be analyzed flows (in-situ installation)—gas conditioning is not required. Highly tolerant of dust, the ZSS can be installed upstream of filtration systems, where so-called extractive (sampling) measurement is generally difficult.
| General | |
| Principle | Laser |
| Method | In-situ |
| Measurable components and scales | Please refer to the table below |
| Light source | Near-infrared semiconductor laser |
| Laser class | CLASS 1 (The high-temperature version and the air-bleed version of O2- analysers s correspond to CLASS 3B) |
| Supply voltage | 100-240 Vac, 50/60 Hz |
| Power consumption | 80 VA |
| Calibration interval | Every 6 months (depending on operating environment) |
| Display | Backlit LCD |
| Information displayed | Component, concentration (instantaneous value, average, corrected instantaneous O2 value, corrected average O2 value), alarm |
| Weight | Receiver and transmitter: approx. 10 kg each Controller: approx. 8 kg |
| Dimensions | Receiver (400 (D) x 180 (W) x 155 (H) mm) Transmitter (400 (D) x 240 (W) x 160 (H) mm) Controller (137 (D) x 255 (W) x 440 (H) mm) |
| IP index | IP65 |
| Performance | |
| Answer | ≤ 4 s (≤2 s for high-speed version) |
| Repeatability | ≤ ± 1.0% FS (depending on components and scales) CO + O2 measurement: ±2% FS |
| Linearity | ≤ ± 1.0% FS (depending on components and scales) CO + O2 measurement: ±3% FS |
| Zero drift | ≤ ± 2.0% FS for 6 months (depending on component and scale) CO + O2 measurement: ± 4% FS for 6 months |
| Effect of interference | ≤ ± 2.0% PE |
| Detection limit | ≤ 1% of minimum scale |
| Input/output signals | |
| Analog outputs | 4-20 mAcc or 1-5 Vcc, 2 or 4 points Measured and corrected O2 values. Possibility of switching between instantaneous and average values |
| Analog inputs | 4-20 mAcc, 2 points Sample gas pressure, temperature, flow velocity, O2 content, water concentration, air purge pressure *Inputs are used for concentration compensation, O2 correction and alarm output. |
| Digital outputs | Relay contact output, 6 points Low light transmission, high/low limit alarm, fault analyser, calibration in progress/hold current measurement, power failure, system fault |
| Digital inputs (optional) | Photocoupler voltage input, 3 points Reset of average value, alternation between instantaneous value and sliding average value, maintenance of remote measurement |
| Installation environment | |
| Ambient temperature | -20 to +55 °C (receiver, transmitter) -5 to +45 °C (controller) |
| Ambient humidity | ≤ 90% RH |
| Optical path length | 0.5 to 10 m (0.5 to 5 m for CO + O2 measurement) |
| Standard flange | JIS 10K, 50A, 100A, DN50/PN10 or ANSI # 150 2B |
| Purge gas | See table below. Purge gas pressure : ≥ 0.3 MPa |
| Purge gas flow | ≥ 20 L/min |
| Gas conditions | See table below Humidity: ≤50 %vol (non-condensing) Pressure: ± 10 kPa (Consult us for pressures above the limit.) Dust: Standard version: ≤5 g/m3 (N) High-dust version: ≤20 g/m3 (N) |
| Measurable components and scales | |||||||
| single-beam analyser 1 component | Measurable components | Scale min.* | Max. scale* | Gas temperature | Purge gas | 4th code | |
| HCl | 10 ppm | 5000 ppm | ≤ 400 °C | Air instrument | C | ||
| NH3 | 15 ppm | 5000 ppm | ≤ 450 °C | W | |||
| CO (high scale) | 2.0%vol | 100%vol | ≤ 300 °C | A | |||
| CO (low scale) | 200 ppm | 1%vol | ≤ 400 °C | M | |||
| CO2 | 2.0%vol | 100%vol | ≤ 300 °C | G | |||
| CH4 | 100 ppm | 100%vol | ≤ 300 °C | R | |||
| O2 | 10%vol | 100%vol | ≤ 300 °C | N2 | P | ||
| O2 (high temperature) | 4%vol | 100%vol | ≤ 1200 °C | Q | |||
| O2 (instrument air purge) | 25%vol | 100%vol | 400 °C ... 1200 °C | Air instrument | T | ||
| single-beam 2-component analyser | CO + CO2 | 2.5%vol | 100%vol | ≤ 300 °C | Air instrument | K | |
| 2-component double-beam analyser | ppm CO + O2 (instrument air purge) | CO | 200 ppm | 2%vol | 400 °C ... 1200 °C | Air instrument | V |
| O2 | 25%vol | 100%vol | |||||
| ppm CO + O2 (high temperature) | CO | 200 ppm | 2%vol | ≤ 1200 °C | N2 | U | |
| O2 | 5%vol | 50%vol | |||||
| %vol CO + O2 | CO | 2%vol | 50%vol | ≤ 300 °C | S | ||
| O2 | 10%vol | 100%vol | |||||
*The measurement scales described above correspond to an optical path of 1 m.
Optimize combustion in incinerators, industrial boilers, and chemical plants with Fuji Electric's laser gas analysers .
Laser gas analyser - ZSS
Reference : ZSS
