scholarly journals Effects of Baffles on Flow Distribution in an Electrostatic Precipitator (ESP) of a Coal Based Power Plant

2015 ◽  
Vol 105 ◽  
pp. 529-536 ◽  
Author(s):  
A.S.M. Sayem ◽  
M.M.K. Khan ◽  
M.G. Rasul ◽  
M.T.O. Amanullah ◽  
N.M.S. Hassan
Keyword(s):  
Power Plant ◽  
Electrostatic Precipitator ◽  
Flow Distribution

Coal Gas Dehydration Equipment in Combined Cycle Power Plant

2012 ◽  
Vol 220-223 ◽  
pp. 554-558 ◽  
Author(s):  
Li Chun Xiao ◽  
Zhi Jiang Ding
Keyword(s):  
Power Plant ◽  
Moisture Content ◽  
Electrostatic Precipitator ◽  
Water Pressure ◽  
Water Flow Rate ◽  
Great Influence ◽  
Combined Cycle ◽  
Water Separation ◽  
Combined Cycle Power Plant ◽  
Coal Gas

To reduce the moisture content of coal gas in combined cycle power plant, a new type dehydration equipment is introduced. The curved plate dehydration equipment is composed of many pieces of stainless plate which has some collection hooks at every corner. Meanwhile, a new method on measuring moisture in gas by using superfine fibreglass is introduced.The gas-water separation efficiency was calculated by the difference of moisture content before and after the curved plate dehydration equipment. The dehydration efficiency of curved plate in combined cycle power plant system was tested under different operating load, the results show that gas velocity and gas/liquid ratio have a great influence on the coal gas dehydration efficiency. If the washing water flow rate and pressure are changed, the efficiency will change at the same time. The moisture content is low when the spraying nozle works at a high water pressure. The operation water pressure and working voltage of electrostatic precipitator have been proposed by testing and analysis. It will have great advantage to the safe operation of turbine.

Flow Distribution Measurements From an Air Cooled Condenser in a ~400MW Power Plant

2011 ◽  
Author(s):  
E. J. Walsh ◽  
R. Grimes ◽  
G. Griffin
Keyword(s):  
Power Plant ◽  
Arid Regions ◽  
Large Scale ◽  
Flow Distribution ◽  
Back Pressure ◽  
Low Velocity ◽  
Steam Power ◽  
Air Cooled Condensers ◽  
The World ◽  
Outlet Flow

The use of air cooled condensers in power generation is increasing in many arid regions of the world. The classical A-frame condenser design is implemented in most new installations despite significant empirical evidence that such designs suffer from poor efficiencies and weather effects, and therefore provide significant scope for improvements. An inefficient condenser results in higher back pressure on the turbine, over-sized condensers and increased fan power. This paper addresses the flow distribution from an air cooled condenser for a ∼400MW gas and steam power plant. The results indicate that the flow patterns from the large scale fans results in a severe inhomogeneous distribution of cooling on the condenser fins. These region of high and low velocity are closely related to the outlet flow pattern from the fans, where in the hub region the air mass flow rate is reduced, while in the tip region it is increased. These measurements provide an excellent basis for both understanding the existing deficiencies of the A-frame designs and moreover provide direction for improved designs in the future.

Failure Analysis of Low Pressure Evaporator Tubes in a Typical Combined Cycle Power Plant

2011 ◽  
Vol 110-116 ◽  
pp. 4607-4614
Author(s):  
M. Nematollahi ◽  
M. Rezaeian
Keyword(s):  
Power Plant ◽  
Steam Generator ◽  
Power Plants ◽  
Fluid Dynamic ◽  
Flow Distribution ◽  
Low Pressure ◽  
Combined Cycle ◽  
Two Phase ◽  
Combined Cycle Power Plant ◽  
Suitable Material

Flow-induced corrosion is one of the most prevalent tube damage mechanisms in steam generators of power plants. In this study, tube failure of a steam generator in Fars Combined Cycle Power Plant is evaluated. In addition to analysis of the measured tube thicknesses and the failure statistics data, computational fluid dynamic (CFD) methods are used to simulate flow distribution inside and outside of the tubes in one header of the low pressure circuit of the plant steam generator. The results show that regarding the created two-phase flow pattern inside the tubes, the droplet impingement erosion is the main source of tube failures in the bending areas where the extrados surface of the tubes are partially prone to the droplets. The results are useful for modifying the design of the steam generator from different viewpoints such as, optimal design for appropriate configuration of downcomer, header and footer and tube bending. Also, selecting suitable material for the steam generator tubes and implementation of protective coating in risky areas would benefit from the present results.

scholarly journals Results of the modernization of the electrostatic precipitator at unit B1 of the Thermal Power Plant Kostolac B

2018 ◽  
Vol 22 (Suppl. 5) ◽  
pp. 1623-1634
Author(s):  
Milic Eric ◽  
Predrag Stefanovic ◽  
Zoran Markovic ◽  
Rastko Jovanovic ◽  
Ivan Lazovic ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Power Plant ◽  
Thermal Power Plant ◽  
Electrostatic Precipitator ◽  
Thermal Power ◽  
Bottom Ash ◽  
Acceptance Test ◽  
Working Parameters ◽  
Matter Concentration ◽  
Limiting Value

The electrostatic precipitator system of the lignite fired 350 MWe unit B1 of Thermal Power Plant Kostolac B has been modernized during 2014. The results of complex in site measurements, performed in the frame of performance control test at the beginning of the exploitation period of the upgraded electrostatic precipitator proved that, under normal and guarantee working conditions of the boiler and precipitator, the emission of particulate matter do not exceed limiting value. After the period of precipitator further adjustments, five series of measurements in the frame of acceptance test were performed in accordance with relevant standards. This paper presents results of the investigation of particulate matter concentration, laboratory analysis of the lignite, fly and bottom ash samples, working parameters of the unit and upgraded electrostatic precipitator as well as results of the calculations. The averaged mean particulate concentration at the exit of upgraded electrostatic precipitator of the unit B1 during Acceptance test was below guaranteed value. It is confirmed that adjustments of electrostatic precipitator electrical parameters have improved electrostatic precipitator efficiency, as well that electrostatic precipitator could work highly efficiently in energy save mode with lower power consumption.

ESP Performance Enhancement Analysis by Advanced Modeling Techniques

2004 ◽  
Author(s):  
K. R. Parker ◽  
N. Plaks ◽  
A. M. Zykov ◽  
K. I. Kolchin ◽  
V. K. Konavalov
Keyword(s):  
Power Plant ◽  
Natural Gas ◽  
Performance Optimization ◽  
Performance Enhancement ◽  
Electrostatic Precipitator ◽  
Full Scale ◽  
Particle Properties ◽  
Power Stations ◽  
Modeling Techniques

Electrostatic precipitator (ESP) modeling development has reached the point in which internal algorithms completely simulate the operation and particulate collection physics of full-scale units. The modern ESPVI 4.0 series of models by using advanced techniques are able to evaluate changes in a precipitator’s configuration and operation to optimize its performance. The author’s applied these techniques to ESPs’ at the Kashira Power Plant near Moscow, having relatively small specific collector area’s (SCA), whose performance will have to be enhanced to meet emerging standards. Advanced modeling techniques include determining electrode and particle properties, operation below back corona onset, and effects of improved electrodes and electrical conditions. The precipitators with collection efficiencies of 88.4 (without natural gas co-firing) up to 93% (with partial co-firing) are shown to be capable of efficiencies of up to 99% by application of modest changes in configuration and operation. The advanced modeling techniques described in this paper are not only important for Kashira, they are also applicable to other power stations requiring performance optimization.

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