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AAF’s primary focus is on gas turbine air intake, exhaust, ventilation and acoustic systems for the offshore industry.
Revision Date: 3/9/2020
Tags: 211111 - Crude Petroleum and Natural Gas Extraction 原油和天然气开采, AAF International, Air Filtration Systems, Bag Filter, Gas Turbine, Offshore, Solutions, Emissions Reduction, Operational Efficiency, Filtration, Global
Overcoming level gauging problems in boilers
GWR level instruments are very practical for boilers, deaerators, feedwater heaters, LP/IP/HP heaters and other steam drums. Matt Brummer of Emerson backs up this observation with an analysis in Processing. They are particularly well suited to mounting in bridles, similar in orientation to existing sight glass installations. They are immune to changes in liquid density and temperature. Even in situations in which the DK of vapors is variable, the ability of GWR instruments to self compensate extends accuracy and reliability. In more general level measuring applications, having a probe to guide the microwave signal helps overcome some problems associated with non-contact radar and ultrasonic technologies such as ghost readings from mixer blades, heavy vapors, condensation, ladders and other internal obstructions. The ability for the signal to follow the guide provides a positive reading even in a variety of difficult applications. GWR level instruments are an excellent choice for many difficult applications, particularly those in which it is important to have precise level measurement in a challenging environment. One example A 900-MW CCGT plant in the southeastern U.S. was struggling with a level-controlling problem. It was using DP level instruments in a two-out-of-three (2oo3) voting scheme to keep its three boilers on an even keel. Under normal conditions it operates at 2,300 psi and 650ºF at the drums. During peak demand, production value is more than $1,000 per MW, so any unplanned shutdown costs hundreds of thousands of dollars per hour. Since the area was prone to occasional freezes during the winter, the DP instruments were protected in an enclosure with the impulse lines heat traced. Even with these precautions, the heat tracing was not fully effective, and the plant experienced multiple trips each winter. Getting the plant stabilized after a trip normally involved operator overtime to get things thawed and back in operation. These losses provided additional motivation to find an alternative. The plant changed all three boilers to instruments equipped with dynamic vapor compensation capabilities. The instruments were mounted in external bypass chambers, and the plant’s control system retained the 2oo3 voting scheme. The new configuration met all the ASME B31.1/BPV1 code requirements. After the installation, the plant survived the winter with no outages, or even near misses, related to boiler drum level measurement, allowing the instruments to pay for themselves after just one winter, according to the site engineering manager.
Revision Date: 5/9/2018
Tags: Emerson Electric, Level Sensor, Gas Turbine
Petrobras Awards Fugro Contract for IRM Work Offshore Brazil
Petrobras has awarded Fugro a two-year contract to provide inspection, repair and maintenance (IRM) and pipeline inspection services offshore Brazil. It follows the contractor’s completion of an initial 12-month assignment for Petrobras after taking delivery of the newbuild vessel Fugro Aquarius. The DP-2, ROV support vessel, purpose-built for the Brazilian market by Wilson Sons shipyard in São Paulo, is 83 m (272 ft) long with a deck area of 520 sq m (5,597 sq ft), and equipped with two Fugro-built 150-hp 3,000-m (9,842-ft) water depth work class ROVs.
Revision Date: 7/24/2017
Tags: Petrobras, Fugro, Pipeline, Support Vessel, Offshore, Contract, Repair Services, Maintenance, Inspection, Brazil
Enterprise Announces Orla II Natural Gas Processing Plant in West Texas (T17)
Enterprise Products Partners L.P. announced June 29 that the company is adding 300 millioncubic feet per day (“MMcf/d”) of incremental capacity at its cryogenic natural gas processing facility currently under construction near Orla, Texas in Reeves County. Orla II, a second processing train at the facility, will double the inlet capacity of the facility to 600,000 MMcf/d and increase extraction of natural gas liquids (“NGLs”) from 40,000 barrels per day (“BPD”) to 80,000 BPD. NGLs from Orla will be delivered into Enterprise’s fully integrated NGL system, including the recently announced Shin Oak Pipeline. The Shin Oak Pipeline is a 24-inch NGL pipeline that will originate at the partnership’s Hobbs NGL fractionation and storage facility in Gaines County, Texas and will transport Permian Basin NGLs to the partnership’s Mont Belvieu NGL complex. Shin Oak will have an initial capacity of 250,000 BPD and will be expandable to 600,000 BPD. Orla’s residue natural gas volumes will be transported to the Waha area through Enterprise’s Texas Intrastate system. The Orla II expansion project is designed to support the continued growth in NGL-rich natural gas production from the Delaware Basin of West Texas and southeastern New Mexico and is supported by long-term commitments. The expansion of the Orla facility will bring the partnership’s total natural gas processing capacity to more than 1 billion cubic feet per day of processing capacity and more than 150,000 BPD of NGL extraction capacity in the Permian Basin. The Orla II capacity is expected to be available in the third quarter of 2018.
Revision Date: 7/17/2017
Tags: 211111 - Crude Petroleum and Natural Gas Extraction 原油和天然气开采, Enterprise Products Partners, Train, Pipeline, Fractionation, Extraction, Pipeline, Capacity Expansion, Construction, Storage, Cryogenic, Gas Processing, USA
Nord Stream 2 Signs Deal with Allseas on Offshore Pipe Laying (T17)
The operator of the Nord Stream 2 project said on April 11 it had signed a contract with Swiss company Allseas for the offshore laying of natural gas pipelines along the bed of the Baltic Sea from Russia to Germany. The company will lay pipelines offshore in 2018 and 2019. Allseas will use three pipelaying vessels: Pioneering Spirit, Solitaire and Audacia. The contract follows a letter of intent agreed between both parties last December. Russia's Gazprom is the only shareholder of Nord Stream 2.
Revision Date: 5/1/2017
Tags: 211111 - Crude Petroleum and Natural Gas Extraction 原油和天然气开采, Allseas, Pipeline, Offshore, LOI, Pipelaying, Russia, Germany
Hydrophobic media provides water removal and prefiltration
Vokes Macrogen GT Duo employs a hydrophobic media that provides effective water removal while in a study of 2 x 250 gas turbines in 2012 also delivered particle filtration to G4 or M5 efficiencies. This means that separate coalescer and prefiltration stages are unnecessary and that the redundant filter phase can be removed. The F9 final filters downstream from the Macrogen GT Duo system ran for a greater number ofhours and had a slightly lower pressure drop (105 against 110 Pascal) over the trial period. This result is due to the fact that the Macrogen has not only reduced the pressure drop but, at the same time, has increased the efficiency of prefiltration (from G4 to M5) better protecting the final filter.
Revision Date: 12/9/2016
Tags: Mann+Hummel, Air Filter
More efficient filters are justified says Carlos Conti of Vokes
Moving from two to three stages has significantly increased system pressure drop but simultaneously reduced the quantity of dust reaching the turbine by approximately 98%, lowering the chance of engine damage – fouling, corrosion and erosion. To quantify this additional pressure drop, it is agreed within the power generation industry that an increase in pressure drop of 50 Pa causes a fall in efficiency of 0.1%. Quantifying the benefit is a balance between reduced fouling and increased pressure drop. The increased pressure drop can be estimated to restrict performance by approximately 0.4%, while cutting fouling provides a 1.2% improvement in output (empirical average). Therefore…
Revision Date: 12/9/2016
Tags: Mann+Hummel, Air Filter
EPA Methods 201A and 202 (and similar methods) remain problematic for gas-fired sources. Dilution methods offer advantages for gas-fired sources.
Revision Date: 4/17/2014
Tags: 221112 - Fossil Fuel 化石燃料, Environ International, Condensible Particulate Matter, Particulate Matter Emission Measurement
Eastman Cyphrex for Versatile Filtration Applications
Eastman Cyphrex thermoplastic microfibers can be made from a wide range of polymers in various shapes and sizes. These fibers are easily dispersed and processed, allowing for blending with other fibers including glass, cellulosic and synthetic.
Revision Date: 4/7/2014
Tags: Eastman Chemical, Microfiber, Filter Media, Air Filter, Air Filtration, International Filtration News
HEPA Filter Advantages Cited in Turbomachinery Article
James Ross of AAF says HEPA filter systems are lasting 80,000 hours. He recommends single stage reverse jet filters for pre filters. Mitsubishi has used HEPA filters for many years and they are widle used on Japanese gas turbines. Steve Medvetz of Gore says the High efficiency filter can eliminate water washing.
Revision Date: 4/2/2014
Tags: 221112 - Fossil Fuel 化石燃料, AAF International, W. L. Gore, Air Filter, HEPA Filter, Air Filtration, Air Intake, Turbomachinery International
HEPA Air Filtration Technology Keeps Compressor Blades Clean
Combustion turbine operators generally experience turbine fouling from airborne particles passing through existing inlet air filters. Fouling can be caused by the particle capture limitations of conventional F-class (EN779:1998) or MERV-class (ASHRAE 52.2) filters. The consequence is reduced performance of the turbine operation.
Revision Date: 3/20/2014
Tags: 221112 - Fossil Fuel 化石燃料, W. L. Gore, Filter Media, Air Filter, HEPA Filter, Air Intake, Air Filtration, Diesel & Gas Turbine Worldwide
Eastman's Cyphrex Microfiber Meets Filtration Needs
Eastman Chemical Company's Cyphrex microfibres for the filtration market have been developed to offer a number of tunable fiber properties including size, shape and material to meet specific end-use applications.
Revision Date: 3/14/2014
Tags: 221112 - Fossil Fuel 化石燃料, Eastman Chemical, Filter Media, Air Filter, Air Filtration, Filtration & Separation
HEPA an Alternative to Compressor Washing
About 10 manufacturers are actively pursuing GT owner/operators for their replacement filter business. But only W L Gore & Associates Inc, Elkton, Md, seems focused on HEPA filters at present. Perhaps the others believe the cost hurdle is too difficult to overcome: Turbine air filters often are considered a commodity with price the deciding factor in the selection process. Gore says its filter media offers a significantly lower pressure drop and longer effective lifetime than competitors’ products.
Revision Date: 11/4/2013
Tags: 221112 - Fossil Fuel 化石燃料, E.ON, W. L. Gore, Air Filter, HEPA Filter, Maintenance, Air Filtration, Air Intake, Combined Cycle Journal
Article by McIlvaine on Gas Turbine Emissions in Air Polluton Control Magazine
In this article, Bob McIlvaine talks about Gas Turbine Emissions and Controls, focusing on intake air filters and NH3 slip monitors.
Revision Date: 3/8/2013
Tags: 221112 - Fossil Fuel 化石燃料, Yokogawa Electric, Nederman, SICK MAIHAK, Analyzer - TDL, Analyzer - NH3, SCR, Air Filter, Ammonia Slip, Air Filtration, Air Intake, Air Pollution Control, Monitoring, Air Pollution Control
Air Inlet System: Make it Right!
This article describes the proper filters and cooling equipment for gas turbine air inlet systems.
Revision Date: 11/29/2012
Tags: 221112 - Fossil Fuel 化石燃料, HEPA Filter, Chiller, Evaporative Cooler, Fogging System, Air Inlet House, Air Filter, Air Filtration, Air Intake, Combined Cycle Journal
Breath of Fresh Air for Gas Turbine Inlet Systems
Analysis of gas turbine inlet filtration system selection based on applications and environment. Author is GE Energy consulting engineer.
Revision Date: 11/27/2012
Tags: 221112 - Fossil Fuel 化石燃料, GE, Air Filter, Air Intake, Air Filtration, Diesel & Gas Turbine Worldwide