Flue Gas Turbine Research Articles

Signal Processing by Energy Normalization Method Based on Wavelet Packet

Fault diagnosis is a key technology to ensure safe and reliable operation of large electromechanical equipments. Fault feature extraction is important in fault diagnosis process. For non-stationary vibration signal, energy normalization method based on wavelet packet is used to make signal processing with signals decomposed into different frequency bands to perform energy normalization process in corresponding frequency band so as to extract fault feature. Flue Gas Turbine is chosen as research object and analysis shows that energy normalization processing method based on wavelet packet can effectively extract non-stationary signal characteristic parameters and make effective nondestructive testing analysis of equipments condition.

Adaptive multiwavelets via two-scale similarity transforms for rotating machinery fault diagnosis

Fault diagnosis of rotating machinery is very important and critical to avoid serious accidents. However, the complex and non-stationary vibration signals with a large amount of noise make the fault detection to be challenging, especially at the early stage. Based on the inner product principle, fault detection using wavelet transforms is to match fault features most correlative to basis functions, and its effectiveness is determined by the construction and choice of wavelet basis function. In this paper, a new method based on adaptive multiwavelets via two-scale similarity transforms (TSTs) is proposed. Multiwavelets can offer multiple wavelet basis functions and so have the possibility of matching various fault features preferably. TSTs are simple and straightforward methods to design a series of new biorthogonal multiwavelets with some desirable properties. Using TSTs, a changeable and adaptive multiwavelet library is established so as to provide various ascendant multiple basis functions for inner product operation. By the rule of kurtosis maximization principle, optimal multiwavelets most similar to the fault features of a given signal are searched for. The applications to a rolling bearing of outer-race fault and a flue gas turbine unit of rub-impact fault show that the proposed method is an effective approach to detecting the impulse feature components hidden in vibration signals and performs well for rotating machinery fault diagnosis.

Development of novel sorbents for mercury control at elevated temperatures in coal-derived syngas: results of initial screening of candidate materials

For next-generation coal-fired power plants such as the integrated gasification combined cycle (IGCC), controlling mercury emissions from the flue gas (turbine exhaust) may not be the most cost-effective option. Rather, it may be more advantageous to remove mercury from the fuel gas (syngas) before its combustion in a gas turbine. This approach aims to maintain the thermodynamic advantages of the IGCC while achieving the desired mercury control. Supported by U.S. Department of Energy's National Energy Technology Laboratory, RTI is screening chemically reactive solid sorbents to remove mercury. The concept of using reactive solid sorbents is analogous to technology RTI has developed for elevated-temperature syngas desulfurization. The goal is a sorbent tailored to remove mercury at the conditions of the syngas produced in a gasifier fed with carbonaceous feedstocks such as coal and petroleum coke. For the sorbent screening program, RTI has assembled a mercury vapor exposure apparatus and is evaluating selected sorbents for mercury removal at high temperatures (400 to 600 °F) in the simulated syngas. The initial testing has identified several effective candidate sorbents, while confirming the expected failure of conventional sorbents under high-temperature conditions. Mercury uptake by each sorbent was measured by analyzing the exposed material. The experimental protocol includes breakthrough testing and additional quality control runs without a sorbent present.

Kerr-Mcgee announces 2003 capital plan

Commercially proven technology developed by Kerr-McGee Chemical Corp., and now jointly licensed by Kerr-McGee and ABB Lummus Crest Inc., is being used for the production of food-grade and chemical-grade CO2 products from coal. The technology can also be used to recover CO2 from oil or gas-fired boiler flue gases, gas turbine and engine exhausts, and other oxygen-containing waste gases. This paper describes the Kerr-McGee/Lummus Crest appraoch for recovering CO2 from oxygen-containing gases, as well as discusses design aspects of a unit which recovers food-grade CO2 from coal-fired boiler stack gases. Markets for CO2 are also discussed.

Kerr-Mcgee announces 2003 capital plan

Commercially proven technology developed by Kerr-McGee Chemical Corp., and now jointly licensed by Kerr-McGee and ABB Lummus Crest Inc., is being used for the production of food-grade and chemical-grade CO2 products from coal. The technology can also be used to recover CO2 from oil or gas-fired boiler flue gases, gas turbine and engine exhausts, and other oxygen-containing waste gases. This paper describes the Kerr-McGee/Lummus Crest appraoch for recovering CO2 from oxygen-containing gases, as well as discusses design aspects of a unit which recovers food-grade CO2 from coal-fired boiler stack gases. Markets for CO2 are also discussed.

KERR-MCGEE SANCTIONS DEEPWATER GAS DEVELOPMENT

Commercially proven technology developed by Kerr-McGee Chemical Corp., and now jointly licensed by Kerr-McGee and ABB Lummus Crest Inc., is being used for the production of food-grade and chemical-grade CO2 products from coal. The technology can also be used to recover CO2 from oil or gas-fired boiler flue gases, gas turbine and engine exhausts, and other oxygen-containing waste gases. This paper describes the Kerr-McGee/Lummus Crest appraoch for recovering CO2 from oxygen-containing gases, as well as discusses design aspects of a unit which recovers food-grade CO2 from coal-fired boiler stack gases. Markets for CO2 are also discussed.

The Kerr-McGee/ABB Lummus Crest technology for the recovery of CO 2 from stack gases

Commercially proven technology developed by Kerr-McGee Chemical Corp., and now jointly licensed by Kerr-McGee and ABB Lummus Crest Inc., is being used for the production of food-grade and chemical-grade CO 2 products from coal. The technology can also be used to recover CO 2 from oil or gas-fired boiler flue gases, gas turbine and engine exhausts, and other oxygen-containing waste gases. This paper describes the Kerr-McGee/Lummus Crest appraoch for recovering CO 2 from oxygen-containing gases, as well as discusses design aspects of a unit which recovers food-grade CO 2 from coal-fired boiler stack gases. Markets for CO 2 are also discussed.