Real Time Monitoring of Mixed Flammable Gas
Features & Advantages
- Continuous monitor 24/7
- Response time: 30 sec
- Monitor respectively %LEL (Lower Explosion Limit)
@ +/- 5% or better
- Monitor two types of flammable gas concentration
@ +/- 0.5% or better
- Explosion proof certified (ATEX / IECEx / TIIS)
Working Principle
- Select two or more gas monitors.
- One gas monitor has higher sensitivity to one type of gas.
- The rest of gas monitor has lesser sensitivity to other type of gas.
- Compute one type of gas concentration referring the values derived from two or more gas sensors.
- Compute other type of gas concentration referring the values derived from two or more gas sensors.
- LEL% can be calculated based on each gas concentration.
Application
Gas calorimeter, CH4 meter
OHC-800(optical and sound velocity sensor)
CH4, H2, CO2 component analysis
（Control for methanation process）
OHC-800(optical and sound velocity sensor)
CH4, H2, CO, CO2, N2 component analysis
(for flare stack optimization and by-product gas in iron factory)
OHC-800(optical and sound velocity sensor)
SO2, SO3 component analysis
SD-3DRI(Infrared sensor)
vs Gas Chromatograph Analyzer
| Our Analyzer | Gas Chromatography | |
|---|---|---|
| Detection Method | Combination of Optical Interferometric and Infrared (or with other) |
Distribution and adsorption |
| Continuous Monitoring | Possible | Impossible (Need to take sample periodically) |
| Response time | In 30 sec. | 3~4 minutes |
| Operating cost | Sensor detecting parts can endure more than 5 years | Column shall be changed every 1~3 years |
| Maintenance | User can change consumable parts | Require support by equipment supplier |
| Total Cost | Less than ½ of Gas Chromatography | Over USD 200K for three years operation |
*Conclusion
All in one explosion-proof gas meter which features high accuracy, continuous measurement and high-speed response than Gas Chromatography
Specifications
| Item | Specification |
|---|---|
| %LEL | Range: 0 – 100% Accuracy: +/- 5 %LEL (guaranteed) |
| Flammable Gas 1 | Unit: vol% Accuracy: +/- 0.3 vol% (expected) |
| Flammable Gas 2 | Unit: vol% Accuracy: +/- 0.2 vol% (expected) |
| IP Rating | Equivalent to IP67 (to be confirmed when propose) |
| Ex Proof Class | ATEX: II 2G Ex db (details to be confirmed when propose) IECEx: Ex db (details to be confirmed) |
Case Studies
Before:
To prevent VOC concentration from reaching LEL, a petrochemical company wanted to monitor following values
- Concentration of Methanol
- Concentration of Methyl-acetate
- %LEL as mixture of methanol and methyl-acetate
Analyzer can monitor VOC gas concentration after 3 min of taking sample and cannot operate it continuously.
And explosive gas monitoring system by other brands can monitor only %LEL which is not reliable.
After:
This customer can monitor following all parameter on real time.
- Methanol concentration
- Methyl-acetate concentration
- %LEL
Furthermore, introduction cost was 30% lower than existing system.