Odorant Injection Systems, Sentry Equipment Z10000, Natural Gas Odorizer

www.sentry-equip.com

Z10000 Odorant Injection System

Represented by:Linc Energy Systems(303) 697-6701www.LincEnergySystems.com

http://www.lincenergysystems.com/


Background

Customer base required an odorant injection design capable of odorizing natural gas transmission / distribution lines (up to 10 MMSCF/Hr gas flow)

Unit also needed to be capable of injecting odorant into pipeline pressures as high as 1480 PSIG

Drip style design (Z9000) did not meet required flow rate / pipeline pressure rating


Additional Design Considerations

Simple design (minimize number/complexity of components)

Consistent flow of odorant through flow rate range Large turndown – cover flow rate range without changing parts

Low volume of odorant between bulk tank and pipeline Long MTTF/MTBF – especially odorant section Prevent bubble creation, degassing issues and vapor lock

Low odorant tank blanket pressure Ability to adapt to fluctuating pipeline pressure Enhance mounting flexibility Maintenance friendly – especially in odorant section

System P & ID


Main System Components



10 YEAR WARRANTY ON BELLOWS PUMP


Z10000 specifications Natural Gas Flow: 0.107 to 10.7 MMSCF/Hr

◦ (*At 0.5 lb/mmscf)

Gas Pipeline Pressure: 1480 psi max

Odorant Injection Rate: ◦ 0.50 to 50 cc/min (0.008 to 0.793 gal/Hr)◦ 24.30 to 2430 g/Hr (0.05 to 5.36 lb/Hr)*at Odorant Density = 0.81 g/cc; Viscosity = 0.3 cP@ 20C

+/- .2% accuracy of odorant flow across the operating range


Motor/gearbox output: 0.25 to 25 RPM Pump Power Requirement: 24 VDC; .193HP; 124.8W

(Maximum) Odorant Blanket Pressure: 15 to 30 psig (1-2 barg) Hazardous Classification: Class 1, Div II, groups C, D Ambient Tmax = 60C (140F) Ambient Tmin = -1C (30F)

*Note: If ambient temperature is below -1C (30F), system requires optional heater

Hourly Archives, Audit trail Serial RS-485 Modbus, Open/TCP Modbus (via wireless modem)

Z10000 specifications


Z10000 options

HMI (via serial interface)Wireless ModemEnclosure HeaterSolar package (solar panel, batteries, charge

controller)120 VAC to 24 VDC power supplyPipe stand (non-skid packages) (5) standard odorant tank / containment skid

packages


Typical odorant tank/containment skid (250 gal)


Design decisions

Why select use of electric motor drive?


Design decisions

Why select use of electric motor drive?

Speed control to better control odorant injection. No hazardous exhaust. Large turndown ratio.


Why such low cycle speed? (0.25 to 25 RPM)

Design decisions


Why such low cycle speed? (0.25 to 25 RPM)

Prevent flashing of odorant, gas entrainment and vapor lock

Design decisions


Design decisions

Why bellows, not diaphragm?


Design decisions

Why bellows, not diaphragm?

Metal Bellows designed for infinite cycle life. Diaphragms have a finite life. Also, diaphragms can allow odorant migration through themselves – thus odorizing the hydraulic oil.


Design decisionsWhy isolate bellows capsules from power

unit?


Design decisions

Why isolate bellows capsules from power unit?

Maintenance. Power unit can be removed for maintenance without disturbing the bellows capsules – minimized re-priming effort at start up. Stay away from the “stink”.


Design decisions

Why Ceramic/Ceramic spring less check valves?


Design decisions

Why Ceramic/Ceramic spring less check valves? Very hard - designed for longer life than SS. Ball and seat manufactured as a matched set to optimize sealing. No spring means lower cracking pressure. Lower cracking pressure means less risk of flashing odorant and vapor lock or gas entrainment. Designed for fast response and fast seating.


Design decisions

Why keep the odorant blanket pressure low?


Design decisions

Why keep the odorant blanket pressure low?

To limit how much gas is dissolved in the odorant. Higher pressure means more dissolved gas. Further inhibits vaporization, vapor lock, and gas entrainment.


Summary

Sentry Z10000 odorant injection system provides accurate and continuous injection across entire gas flow range

Infinite cycle life metal bellows pump with no seals in odorant loop

Extensive odorant monitoring, data logging and validation software

CLOSED SYSTEM - No natural gas or odorant exhausted to atmosphere


Questions ?

Odorant Injection Systems, Sentry Equipment Z10000, Natural Gas Odorizer

Design

Transcript of Odorant Injection Systems, Sentry Equipment Z10000, Natural Gas Odorizer