MARV 2EX – measurement of dust in wet gas
MARV 2EX – the system is developed according to the requirements of ATEX, Zone 1/2 based on the MARV EX system after receiving requests from our customers to measure dust in wet explosive gas.
MARV 2EX measuring system for applications in explosive atmospheres
The MARV 2EX dust monitoring system is the only system for measuring dust by the extractive method in a technological process saturated with moisture in an explosive environment.
MARV 2EX = EXtractive EX-proof Optical Particle Monitoring CEMS Extractive, isokinetic and continuous measurement of suspended particles with temperature control for wet processes in explosive atmospheres
The system is designed for continuous measurement of the concentration of dust particles in industrial processes. It is an ideal solution for monitoring dust concentrations in wet gases, for example after wet scrubbers or in condensing environments.
The MARV 2EX model is the only one that can measure dust in explosive atmospheres according to ATEX (Zone 1/2) requirements.
For use in explosive environments, the MARV 2EX dust monitoring system uses a special configuration
- nitrogen (N2) heated sampling probe,
- special design optical sensor with nitrogen purge,
- and built-in PLC,
which are placed in a weather-resistant steel housing, where N2 shielding gas is used to protect against the formation of an explosive gas atmosphere.
During operation, the probe continuously samples gas, which is heated in the probe to evaporate any moisture. The remaining particles in the dry gas are directed through the measuring chamber of the optical sensor. The light is directed through a stream of particles, causing the light to scatter. The photodiode detector catches the scattered light and determines the concentration of particles in the gas sample by the amount of scattered light.
Features of MARV 2EX:
- Isokinetic sampling under variable flow conditions
- Constant dust level up to 0.1 mg/m3
- Dust filter for pump protection with automatic back-purge
- Accurate linear measurement for all types of dust
- PLC visualization software, local HMI (option) and WEB HMI for easy parameterization
- Conformity assessment according to the Technical Regulation of legally regulated measuring instruments, certificate No. UA.TR.001 46-19
Application in metallurgical production
BFG (Blast Furnace Gas)
Measurement of dust concentration before reuse of gas in a boiler or gas turbine operating on blast furnace gas (BFG).
Standard volume composition of blast furnace gas:
- CO: 20 – 30 %,
- CO2: 12 – 20 %,
- H2: 1 – 4 %,
- CH4: up to 0,5 %
- rest N2.
Process gas temperature: 80 °C Relative humidity: 100%
BOF (Basic Oxygen Furnace)
Monitoring of dust emissions level after cleaning in a wet scrubber according to state rules (50 mg/m3) or measuring dust before reuse of converter gas in the boiler.
Standard volume composition of basic oxygen furnace gas:
- CO: 55 – 60 %,
- CO2: 12 – 18 %,
- O2: 0,1 – 0,3 %
- rest N2.
Process gas temperature: 70 °C Process pressure: 0,95 – 1,023 Bar Abs. Gas velocity: 5-30 m/s Relative humidity: 100%
MARVILON is a leader in the development of innovative solutions for monitoring technological processes.
MARVILON LLC is an advanced technology company based in Kyiv, Ukraine. We specialize in the development of modern systems for monitoring dust and gases in technological processes. Our mission is to use advanced technologies to increase the productivity and efficiency of your business.
We offer a wide range of services, including the development of systems according to the technical task, preparation of documentation, development of specialized software for system control, supply, chief installation, warranty, and post-warranty support. Our team of professionals is ready to help you realize your technological vision
