Analyse à l’aide de chromatographes en phase gazeuse de la qualité du biométhane gazeux injecté dans le réseau
Respectez les normes d’injection de biométhane dans le réseau grâce à une analyse fiable des composants
Réduisez les coûts et assurez l’interchangeabilité du biométhane avec le gaz naturel
Différentes technologies permettent d’épurer le biogaz et de le transformer en biométhane/gaz naturel renouvelable (GNR). L’objectif des technologies de valorisation consiste à obtenir une grande pureté du méthane et de faibles pertes de ce gaz tout en consommant peu d’énergie. La technologie de production et la matière première de biogaz affectent la composition du biométhane. La matière première du biogaz peut consister en déchets alimentaires, gaz de décharge, déchets d’élevage, traitement des eaux usées et résidus de cultures.
Lors de l’introduction du biométhane dans le réseau, il est impératif de déterminer la qualité du gaz et la quantité d’énergie introduite, ainsi que de vérifier la précision de ces valeurs. Un chromatographe en phase gazeuse (GC) constitue une méthode fiable d’identification de l’analyse des composants du biométhane ainsi que de surveillance de sa qualité, de son pouvoir calorifique et de son indice de Wobbe. Emerson propose deux solutions de chromatographes en phase gazeuse pour répondre aux besoins d’analyse du biométhane. Ces chromatographes en phase gazeuse sont certifiés conformes aux normes de métrologie industrielles et nationales.
Cliquez pour continuer la lecture Réduisez les coûts et assurez l’interchangeabilité du biométhane avec le gaz naturel
Solutions pour les produits
Designed for optimum reliability and flexibility, the Rosemount 700XA Process GC provides extended gas composition analysis with remote operation capabilities in an explosion-proof, field-mountable design. This reduces the need for elaborate analyzer shelters or temperature control requirements. Whether it is heating value measurement, trace contaminant monitoring, or product quality and process control, the Rosemount 700XA offers the flexibility to combine measurements in a single, transmitter-style GC, reducing footprint and total cost of ownership.
- Industry's first transmitter-style gas chromatograph capable of combining the measurement of natural gas energy content, hydrogen sulfide, speciation of total sulfur compounds to trace levels, and hydrocarbon dew point (HCDP) calculations in a single-analyzer solution
- Explosion-proof and ATEX/IECEX safety rating enables field installation without enclosure even in Class 1, Division 1 areas
- No instrument air for purge or oven required, reducing power consumption over traditional air purged GC units
Input
Analog Intputs: Six self-powered isolated outputs (4–20 mA)
Digital inputs: Five inputs, user assignable, optically isolated, rated to 30V DC @ 0.5 A
Digital inputs: Five inputs, user assignable, optically isolated, rated to 30V DC @ 0.5 A
Output
Analog outputs: Six self-powered isolated outputs (4–20 mA)
Digital outputs: Five user-assignable outputs, Form C and electromechanically isolated, 24V DC
Digital outputs: Five user-assignable outputs, Form C and electromechanically isolated, 24V DC
Communication Protocol
Ethernet: Two ports – one RJ-45 and one four-wire – with 10/100 mbps
Serial: Three termination blocks, configurable as RS-232, RS-422 or RS-485 and one RS-232 D-sub (9-pin) Modbus/PC Connection
Serial: Three termination blocks, configurable as RS-232, RS-422 or RS-485 and one RS-232 D-sub (9-pin) Modbus/PC Connection
Rosemount 770XA Natural Gas Chromatographs provide the most accurate analysis of natural gas available in a field mounted gas chromatograph (GC). The 700XA features a design that increases analytical capability, maximizes ease of use, and widens the range of analysis options in a GC with an ambient temperature rating of -20 °C to 60 °C/ -4 °F to 140 °F. These enhanced features make the 700XA ideal for natural gas custody transfer and applications requiring advanced analysis such as C9+ (with hydrocarbon dew point and cricondentherm calculations) and C6+ with hydrogen sulfide (H2S).
- Best C6+ heating value/BTU repeatability available
- ± / -0.01 % (± / -0.1 BTU/1000 BTU) in temperature controlled environment
- ± / 0.02% (± / -0.2 BTU/1000 BTU) in uncontrolled environment (-20° to 60 °C/-4° to 140 °F) with a three minute cycle time
Input
Analog inputs: Two standard isolated inputs filtered with transient protection, 4–20 mA (user scalable and assignable)
Digital inputs: Five inputs, user assignable, optically isolated, rated to 30V DC @ 0.5 A
Digital inputs: Five inputs, user assignable, optically isolated, rated to 30V DC @ 0.5 A
Output
Analog outputs: Six self-powered isolated outputs (4–20 mA)
Digital outputs: Five user-assignable outputs, Form C and electromechanically isolated, 24V DC
Digital outputs: Five user-assignable outputs, Form C and electromechanically isolated, 24V DC
Ports
Serial Communication Ports: Three termination blocks, configurable as RS-232, RS-422 or RS-485 and one RS-232 D-sub (9-pin) Modbus/PC Connection
